EP2393615B1 - Method and device for hydrodynamically eliminating defects in the interior of pipelines - Google Patents
Method and device for hydrodynamically eliminating defects in the interior of pipelines Download PDFInfo
- Publication number
- EP2393615B1 EP2393615B1 EP10707207.6A EP10707207A EP2393615B1 EP 2393615 B1 EP2393615 B1 EP 2393615B1 EP 10707207 A EP10707207 A EP 10707207A EP 2393615 B1 EP2393615 B1 EP 2393615B1
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- EP
- European Patent Office
- Prior art keywords
- pressure jet
- jet nozzle
- pressure
- push rod
- pipeline
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/0433—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided exclusively with fluid jets as cleaning tools
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/006—Arrangements or methods for cleaning or refurbishing water conduits
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
Definitions
- the invention relates to a method for the hydrodynamic removal of impurities in the interior of pipelines, in particular for the rehabilitation and cleaning of water-bearing pipelines in domestic and industrial areas.
- liquid or flowable materials such as paint, mortar and the like are disposed of through the drain, where they narrow the flow area of the pipe after its hardening similar to the described incrustations.
- liquid or flowable materials such as paint, mortar and the like are disposed of through the drain, where they narrow the flow area of the pipe after its hardening similar to the described incrustations.
- full closures of pipelines can be found where concrete already accidentally enters a pipeline during the construction phase of a building. If this remains unnoticed until the concrete has hardened, the defect only becomes noticeable when the building is put into operation. A refurbishment is then often only possible at great expense by renewing the pipeline.
- hydrodynamic pipe cleaning is known, which has established itself especially in the channel cleaning.
- the state of the art are exemplified by DE 103 23 298 A1 . DE 1 165 945 B . DE 197 03 317 A1 and DE 295 13 288 U1 called.
- a flushing head introduced into the pipe to be cleaned is supplied with pressurized cleaning liquid via a connected flushing hose.
- the cleaning liquid is not only used to clean the inner walls of the tube, but at the same time generates a rebound effect based feed movement of the flushing head in the pipe to be cleaned.
- the rinsing heads have radially obliquely rearwardly directed recoil openings, so that with exit of the high-pressure liquid jets from these openings on the one hand the dirt on the pipe inner walls are rinsed off and, secondly, the flushing head undergoes an advancing movement due to the repulsive force of the cleaning liquid.
- the flushing head therefore only has to be introduced into a starting opening and then works by itself through the piping system before the flushing hose together with the flushing head is manually or mechanically retracted again to the starting opening in the final operation.
- a rinsing head is also already known in which, in addition to the recoil openings, a forwardly directed nozzle opening generates a pressure jet.
- Such devices have in common that most of the working fluid needed for the feed and is introduced at high speed against the direction of movement of the flushing head in the pipeline.
- US-A-5,988,188 discloses a method and apparatus for hydrau-dynamic removal of imperfections in the interior of pipelines, wherein a pressure jet nozzle can be inserted by means of a push rod in a pipeline.
- the object of the invention is to provide a method and a device, with which incrustations in pipelines caused by incrustation, deposits, concrete closures, root ingrowths and the like can be removed quickly and efficiently and at the same time gentle on the tube and economically.
- the invention utilizes the kinetic energy of a fluid jet impinging upon an impurity under high pressure and high velocity to eliminate the disturbance.
- the feed force for the pressure jet nozzle is generated solely by means of a push rod.
- the kinetic energy inherent in the pressure jet is therefore fully and effectively translated into work to eliminate the impurity, so that lower pump or compressor capacity is sufficient to achieve excellent remediation results compared to known high pressure wash techniques. So it is achieved with less total energy a better work result.
- the pressure necessary for the invention depends not only on the selected nozzle and tube geometry crucial also of the type, in particular the material to rehabilitating pipeline.
- For high-strength steel pipelines it is possible to work with water pressures of up to 300 bar in the remediation operation, while the sometimes very brittle PVC pipelines in the domestic area should only be exposed to reduced water pressures of up to 150 bar during cleaning.
- the operating pressure for use in the domestic sector is below 250 bar.
- Another advantage of the invention results from its universal applicability.
- defects whether it be a simple Versehr section with fat, fecal matter, paper, root system, etc., or hard pipe wall deposits, such as lime or urine brick, cement, mortar or concrete, with a device quickly and be removed reliably.
- the invention is capable of successively removing solid closures of concrete, to which the operating pressure is advantageously increased to 250 bar to 500 bar or up to 600 bar and more.
- the targeted use of the invention in the field of impurity is by inserting a connected to a pressure hose pressure jet nozzle by means of a push rod to the point of failure, then by establishing a predetermined distance of the pressure jet nozzle to the point of failure and by subsequently pressurizing the pressure jet nozzle via the connected pressure hose with a pressurized Working fluid reached.
- the size of the distance depends on the jet angle of the pressure jet nozzle, wherein the outlet opening of the pressure jet nozzle is so far away from the point of failure that the pressure jet emerging from the pressure jet nozzle at the point of impurity the entire Internal pipe circumference recorded.
- a Druchstrahl is provided in the form of a rotating spot beam according to the invention.
- a jet angle at which the generated pressure jet leaves the frontal central outlet opening in relation to the longitudinal axis of the pressure jet nozzle is between 15 ° and 45 °.
- the pressure jet nozzle is pushed into the pipeline with the aid of the push rod in the direction of the pipe's slope, ie in the direction of flow, so that the pressure jet is discharged together with the dissolved incrustations in the direction of the duct system. Since there is no backward directed jet of pressure in the invention, there is thus no risk that liquid will escape at the access opening to the pipeline and cause damage there.
- a suitable embodiment of the invention provides for connecting the pressure jet nozzle to the push rod via a 180 ° bend in order to change the orientation of the pressure jet. This guarantees that during the hydrodynamic application no liquid and impurities escape at the housing-side pipe ends.
- the pressure jet emerging from the pressure jet nozzle is a rotating spot beam according to the present invention.
- the impinging pressure jet effectively splits the adhering deposits without damaging the pipe wall.
- the push rod for inserting the pressure jet nozzle of a device according to the invention in a pipeline is characterized by a compressive strength and flexural rigidity, which are sufficiently large to absorb the pressure-dependent recoil and torsional forces from the pressure jet and at the same time to transmit feed forces to the pressure jet nozzle. Since in most cases the pipeline to be rehabilitated has one or more changes of direction in the section from the insertion opening to the point of failure, in addition to the pressure stability, the bowability of the push rod is another determining factor for the suitable bending stiffness of the push rod.
- Suitable push rods are made for example of glass fiber reinforced plastic with a diameter of 5 mm to 12 mm and can be formed by either axially assembled rod or rod-shaped elements or a quasi endless rod, which is unwound in the required length of a reel. With such thrust rods, pressure jet nozzles can be pushed into pipes over lengths of up to 150 m and more.
- a push rod as a propulsion-generating means also brings with it the advantage that the operator at the site the pressure jet nozzle with muscle power or motor driven starting from any inlet opening, selectively pushed into the pipe system through bends and branches forward until the pressure jet nozzle finally the Pipe section has reached with the impurity.
- the reaching of the defect is monitored either "online” using a mounted in the immediate vicinity of the pressure jet nozzle camera system or "blind” determined by abutting the pressure jet nozzle at the fault.
- the push rod can now be removed to unfold the optimal cleaning performance first by a predetermined distance from this blockage point, namely by retraction, ie opposite to the direction of insertion or, when using a 180 ° - tube bend, by further insertion in the insertion direction by the pressure jet nozzle through the narrowed or blocked section.
- the pressure jet due to its high impact energy, crushes the incrustations, deposits or the like and rinses them away in the flow direction of the tube.
- the push rod gives the operator a feedback and thus allows a precise and sensitive guiding of the pressure jet nozzle within the pipeline, both forward and backward. In combination with a camera system, it is thus possible to eliminate defects in a highly targeted manner and thus extremely effectively.
- the front of the pressure jet nozzle end portion of the push rod has a lower bending stiffness on as the remaining push rod.
- a steel compression spring which is fastened with its first end to the pressure jet nozzle and with its second end to the push rod.
- Such an embodiment also has the advantage that the pressure hose is guided in the last section before the pressure jet nozzle within the compression spring and thus supported by this and protected from mechanical stress.
- the pressure jet nozzle is inserted within a housing.
- the housing has, for example, the shape of a hollow cylindrical sleeve, in the receptacle of which the pressure jet nozzle can be inserted axially and fixed by means of radial threaded screws or clamping pins.
- the housing may also be formed by a plurality of shells, preferably two half-shells which, when joined together, surround the pressure jet nozzle and leave only the area of the nozzle opening and the connection to the push rod free.
- pressure jet nozzles can also be used which have a nozzle insert inserted in the nozzle body and determining the spray steel geometry. To change the spray jet geometry, it is therefore only necessary to replace the nozzle insert instead of the entire nozzle body.
- the pipe cleaning device may additionally comprise a tubular running gear, on which the high pressure cleaning nozzle itself and optionally the subsequent longitudinal portion of the Duckschlauches are arranged.
- the chassis has an integrated drive, such as electric drive, for automatically driving on the pipe system.
- the finding of the defect and thus finding the position up to which the pressure jet nozzle in the first step of the invention must be inserted into the pipe is greatly facilitated by the optional use of a pipe inspection camera, which is mounted in the vicinity of the pressure jet nozzle and in the direction of Pressure jet shows. About a connected to the camera video data line along the pressure hose back to the insertion opening of the invention Device is performed, recorded by the camera video images of the pipe interior are displayed to the operator on a corresponding monitor. So not only can the defect be found and analyzed easily, but also the removal of the defect can be monitored online.
- the components to be introduced into the tube comprising a pressure hose, a push rod and, if appropriate, supply lines for the camera system, are advantageously connected to one another, so that virtually a combined strand is created.
- these components can be selectively connected at axial distances with longitudinal restraint or guided within a tubular envelope. In this way, not only the handling of the device is facilitated, but the lines is protected in the case of full wrap from damage and contamination.
- the individual components such as pressure jet nozzle, compression spring, push rod, camera and the like are connected to each other by means of detachable bayonet or other types of quick connectors. This allows the rapid replacement of non-functional components, the simple conversion of the device for a different purpose using the same parts and the space-saving stowage of the device for transport to the job site.
- a centering aid may be provided in the manner of a union nut or sliding sleeve, which surrounds the high-pressure cleaning nozzle on the outer circumference and lifts by support on the pipe inner wall, the outlet opening of the pressure jet nozzle on or in the vicinity of the pipe longitudinal axis.
- a union nut or sliding sleeve which surrounds the high-pressure cleaning nozzle on the outer circumference and lifts by support on the pipe inner wall, the outlet opening of the pressure jet nozzle on or in the vicinity of the pipe longitudinal axis.
- inventive method and the device according to the invention are particularly advantageous in the renovation of pipelines with diameters of 70 mm to 200 mm used in the home.
- the method and / or device can also be used to clean ground canals and to remove ingrown shrubs or tree roots.
- the pressures used are below 250 bar, but can reach up to 600 bar and more for special applications (eg full closure with high-strength concrete). Decisive for the upper pressure limit is the strength of the pipeline, which must not be damaged.
- the outlet openings of the pressure jet nozzles vary in the order of 0.2 mm to 1.2 mm, preferably from 0.3 mm to 0.7 mm.
- the demand for working fluid is normally between 10 l / min and 25 l / min.
- the in the FIGS. 1 to 8 illustrated invention relates only to the end portion of a device 4 according to the invention, which is introduced to eliminate an impurity in a pipe 1.
- the total length of the device 4 including the complete pressure hose 8 and push rod 9 depends on the particular circumstances on site and can be 120 m and more. In the home and living area in most cases total lengths of about 35 m are sufficient.
- FIGS. 1 to 4 show a first embodiment of the invention.
- 1 denotes a longitudinal section of a pipeline to be rehabilitated, which has incrustations 2 on its inner circumference, which considerably reduce the flow cross-section of the pipeline 1.
- the direction of the pipe 1 and thus the direction of flow is indicated by the arrow 3.
- the illustrated device 4 comprises a pressure jet nozzle 5 in the form of a spot jet rotation nozzle, which has at its tip a central opening 6 from which a working fluid emerges in the form of a single concentrated punctiform and thus high-energy pressure jet 7.
- the angle ⁇ at which the generated pressure jet 7 leaves the frontal central outlet opening 6 with respect to the longitudinal axis of the pressure jet nozzle 5 is referred to as the jet angle and amounts to 15 ° to 45 °, depending on the nozzle geometry used.
- This obliquely emerging pressure jet 7 rotates while maintaining the jet angle ⁇ about the longitudinal axis of the pressure jet nozzle 5, so that the result is a closed circular line as the spray pattern.
- the device 4 according to the invention can also be operated with pressure jet nozzles 5 which have other jet patterns, for example an elliptical line, a circular spiral line or other closed lines.
- pressure jet nozzles 5 which have other jet patterns, for example an elliptical line, a circular spiral line or other closed lines.
- the pressure jet nozzle 5 is connected to its rear end to a pressure hose 8, which is to a compressor, not shown, outside the Piping leads and is pressurized from there with a working fluid.
- a working fluid is preferably water used. More generally, the working fluid is a fluid that may optionally be supplemented with abrasive solids.
- the push rod 9 is made of glass fiber reinforced plastic and serves to apply feed forces to the pressure jet nozzle 5, to which the push rod 9 is inserted manually or by motor in the piping system.
- pressure hose 8 and push rod 9 are longitudinally positively connected with each other at predetermined longitudinal intervals, which can be done most easily by wrapping with an adhesive tape. It is also possible to guide the pressure hose 8 and push rod 9 into the rehabilitation area within a common hose-like sheath 10, for example within a heat-shrinkable tube, whereby additional protection against damage or soiling is achieved.
- the longitudinal section of the push rod 9 lying directly in front of the pressure jet nozzle 5 is formed by a compression spring 11 which has a lower flexural strength than the remaining push rod 9.
- a compression spring 11 which has a lower flexural strength than the remaining push rod 9.
- a sleeve-like coupling piece 12 To insert the compression spring 11 in the device 4 is seated on the end of the push rod portion 9 made of fiberglass reinforced plastic, a sleeve-like coupling piece 12, in which the compression spring 11 is axially inserted with its end and secured against withdrawal.
- the opposite end of the compression spring 11 is rigidly connected to the pressure jet nozzle 5, for which purpose a sleeve 13 is welded to the pressure jet nozzle 5, in which the compression spring 11 is inserted with its end and fixed.
- the pressure jet nozzle 5 is not directly, but coupled via an intermediate sleeve-shaped receptacle 14 to the pressure hose 8.
- this serving as a connection adapter receiving sleeve 14 can be depending on the present constipation situation, the z. B. characterized by the pipe diameter, the clogging material or the Verstopfungsabunk, a correspondingly adapted pressure jet nozzle 5 quickly and easily remove and remove.
- radially continuous grub screws 15 which engage in corresponding radial openings or grooves of a Einsteckfortsatzes the Druckstrahldüse 5, be solved before the Pressure jet nozzle 5 pulled out and a new nozzle can be inserted into the receiving sleeve 14.
- the illustrated embodiment of the device 4 includes a camera 16, the video signal recorded via a video data line 17 for display to a non-illustrated TV unit located outside the pipeline system transmits.
- the connection of the camera 16 to the push rod 9 is in the 3 and 4 particularly clearly visible.
- the camera 16 is connected to the push rod 9 restrained.
- the secondary sleeve 18 is welded to the camera 16 for this purpose.
- the video data line 17 emerging from the rear end of the camera 16 continues together with the push rod 9 and the pressure hose 8 inside the tubular sheath 10.
- the device 4 according to the invention With the pressure jet nozzle 5 is first pushed so far in the (partially) clogged pipe 1 with the compressor off until the pressure jet nozzle 5 has reached the impurity.
- the device 4 according to the invention generates only an obliquely forward, i. directed in the direction of insertion pressure jet 7, which normally has in the flow direction 3 of the pipeline 1.
- the insertion of the pressure jet nozzle 5 thus takes place actively with the help of the push rod 9, which is sufficiently pressure-stable due to its bending stiffness to apply a sufficient feed force to the pressure jet nozzle 5, but at the same time is sufficiently flexible to follow the course of the pipe even in areas of bends and branches can.
- the pressure jet nozzle 5 is withdrawn from the impurity by the distance A, before the pressure jet nozzle 5 is pressurized with working fluid.
- the distance A By maintaining the distance A, it is ensured that the pressure jet 7 reaches the inner circumference of the pipeline 1 at a given jet angle ⁇ in the plane of the defect. There causes the pressure beam 7 due to its kinetic energy crushing and flushing the incrustations 2 and thus eliminating the impurity.
- the device 4 is pulled out by means of the push rod 9 back to the starting opening.
- the insertion direction coincides with the flow direction 3 of the pipe 1. Since the pressure jet 3 is directed forward, that is to say in the insertion direction, the working fluid can run off together with the dissolved incrustations 2 in the direction of flow 3 of the pipeline 1. However, if only the way through the (partially) blocked pipe is opposite to its direction of flow available, ie in a downpipe for example by a corresponding basement connection from bottom to top in the building, for example, because pushing in the direction of flow is not possible because of the absence of the respective rental party is, then such a device would be 4, as in the Fig.
- the invention provides for the use of a 180 ° tube bend which is interposed between the pressure jet nozzle 5 on the one hand and the push rod 9 or pressure hose 8 on the other hand.
- the orientation of the pressure jet 7 is rotated so that the working fluid and the comminuted impurities in the flow direction 3 are disposed of even when the pressure jet nozzle 7 is pushed in against the direction of flow 3 of the tube 1.
- the end of the push rod 9 is fork-shaped with the bar sections 9 'and 9 " on, on which they are rigidly attached with their ends.
- FIGS. 6 to 8 show the embodiment of the invention, in which the pressure jet nozzle 5 is disposed within a housing 20.
- the housing 20 consists of two half-shells 21 and 22, which are constructed substantially mirror-inverted and can be assembled with the aid of centering bolts and screws precisely to a whole.
- the housing 20 encloses a rotationally symmetrical cavity along the axis 23, which is open towards the front sides of the housing 20 and which serves to receive the pressure jet nozzle 5 (FIG. Fig. 8 ).
- the cavity is composed of a cylindrical portion 25 of smaller diameter, an axially adjoining substantially conical portion 26 and a second cylindrical portion 27 of larger diameter.
- the frontal opening of the section 27 is narrowed by a circumferential annular web 28.
- FIG. 6 shows the housing 20 is divided in the longitudinal direction in a cylindrical central portion 29, from which the housing 20 tapers to both sides.
- the angle of inclination of the bevels 19, 24 with respect to the axis 23 is between 20 ° and 35 °.
- the central part 29 is provided with parallel to the axis 23 runners 30 on which the housing 20 is supported on the pipe inner wall, thereby reducing the sliding resistance.
- housing provides a circular cross-section housing circumference, from which extend the longitudinal skids in the radial direction and with a uniform mutual circumferential distance.
- housing with a smooth surface, ie without runners, is encompassed by the invention.
- FIG. 8 The combination of the housing 20 with a device according to the FIGS. 1 to 5 is in FIG. 8 shown. It can be seen how from the housing 20, namely of the section 27, the pressure jet nozzle 5 is enclosed substantially free of play. In this case, the annular web 28 engages in a corresponding recess on the pressure jet nozzle 5, so that an axial fixation of the pressure jet nozzle 5 between the annular web 28 and section 26 is given.
- spacer rings may be inserted between the pressure jet nozzle 5 and the inner circumference of the section 27 in order to be able to insert smaller pressure jet nozzles into the housing 20, even in diameter.
- the pressure jet nozzle 5 At the lying in the housing interior end of the pressure jet nozzle 5 includes a compression spring 32, which in turn embodies the more flexible part of the push rod 9. On the pressure jet nozzle 5 associated end of the compression spring 32 is fixedly seated a ring 33 which fills the conical portion 26 positively and so a tension and pressure-resistant locking the compression spring 32 in the housing 20 causes.
- the compression spring 32 extends through the cylindrical portion 25 therethrough and extends with its lying outside of the housing 20 end into a receiving bore of a sleeve-like coupling piece 34, where it is firmly anchored. From the opposite longitudinal end of the coupling piece 34 extends a passage 35, which merges in its further course in the receiving bore.
- a coupling piece 34 in the longitudinal direction penetrating channel which serves to guide the pressure hose 8 into the interior of the compression spring 32, where the pressure hose 8 is guided axially to the pressure jet nozzle 5.
- the coupling piece 32 also has an axial blind bore 36, in which the glass fiber reinforced plastic existing part of the push rod 9 is tension and pressure resistant attached.
- a receptacle for a camera can be integrated in the housing 20.
- the recording in the manner of a cylindrical recess can thereby emerge monolithically from the housing wall and allows axial insertion of the camera.
- Supply and data lines for the camera are advantageously guided in such an embodiment in addition to the pressure hose within the compression spring.
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Description
Die Erfindung betrifft ein Verfahren zum hydrodynamischen Beseitigen von Störstellen im Inneren von Rohrleitungen, insbesondere zur Sanierung und Reinigung von wasserführenden Rohrleitungen im häuslichen und industriellen Bereich.The invention relates to a method for the hydrodynamic removal of impurities in the interior of pipelines, in particular for the rehabilitation and cleaning of water-bearing pipelines in domestic and industrial areas.
Die Problematik sich verengender Durchflussquerschnitte wasserführender Rohrleitungen sowohl bei der Trinkwasserversorgung als auch der Wasserableitung ist hinlänglich bekannt. Durch Bildung von Inkrustationen an der Innenwandung der Rohrleitungen verringert sich der Durchflussquerschnitt im Laufe der Jahre nicht selten auf ein Drittel und weniger des ursprünglichen Rohrquerschnitts, mit der Folge, dass die Durchflussleistung der Rohrleitung erheblich sinkt. Solche Inkrustationen bestehen in der Regel aus Wasser-, Kalk-, Urin- oder Seifenstein und sind aufgrund ihrer großen Härte nur schwer zu entfernen. Gleichzeitig bergen solche kritischen Störstellen stets die Gefahr, dass es bei Durchleitung größerer Inhaltsstoffe im abzuleitenden Wasser zu einem plötzlichen Vollverschluss der Rohrleitung kommt. Eine andere Ursache für Querschnittsverengungen oder -verschlüsse ist die Folge bewussten oder unbewussten menschlichen Fehlverhaltens. So werden nicht mehr benötigte, flüssige oder fließfähige Stoffe, wie zum Beispiel Farben, Mörtel und dergleichen durch den Abfluss entsorgt, wo sie den Durchflussquerschnitt der Rohrleitung nach ihrem Erhärten ähnlich den beschriebenen Inkrustationen verengen. Nicht selten sind sogar Vollverschlüsse von Rohrleitungen anzutreffen, bei denen Beton schon während der Bauphase eines Gebäudes versehentlich in eine Rohrleitung gelangt. Bleibt dies bis zum Erhärten des Betons unbemerkt, so macht sich die Störstelle erst mit Inbetriebnahme des Bauwerks bemerkbar. Eine Sanierung ist dann oftmals nur noch unter großem Aufwand durch Erneuerung der Rohrleitung möglich.The problem of narrowing flow cross sections of water-bearing pipelines both in the drinking water supply and the drainage is well known. Through the formation of incrustations on the inner wall of the pipelines, the flow cross section is often reduced over the years to one third and less of the original pipe cross section, with the result that the flow rate of the pipeline decreases significantly. Such incrustations usually consist of water, lime, urine or soapstone and are difficult to remove due to their high hardness. At the same time, such critical defects always entail the risk of a sudden full closure of the pipeline when larger components are carried in the water to be discharged. Another cause of cross-sectional constrictions or occlusions is the result of conscious or unconscious human misconduct. Thus, no longer required, liquid or flowable materials, such as paint, mortar and the like are disposed of through the drain, where they narrow the flow area of the pipe after its hardening similar to the described incrustations. Not infrequently, even full closures of pipelines can be found where concrete already accidentally enters a pipeline during the construction phase of a building. If this remains unnoticed until the concrete has hardened, the defect only becomes noticeable when the building is put into operation. A refurbishment is then often only possible at great expense by renewing the pipeline.
Zur Beseitigung solcher Störstellen sind zahlreiche Verfahren und Vorrichtungen bekannt. Man unterscheidet hierbei grundsätzlich zwischen chemischen, mechanischen und hydrodynamischen Rohrreinigungsverfahren bzw. -vorrichtungen.Numerous methods and devices are known for eliminating such defects. In principle, a distinction is made between chemical, mechanical and hydrodynamic pipe cleaning methods or devices.
Bei der chemischen Rohrreinigung werden spezielle Reinigungsflüssigkeiten, meist Säuren einer bestimmten Konzentration, in das inkrustierte Rohr eingefüllt mit der Absicht, die Inkrustationen aufzulösen. Da die chemischen Reaktionen im zu reinigenden Rohr jedoch unkontrolliert ablaufen, ist der Reinigungserfolg unsicher, so dass der Vorgang unter Umständen öfters wiederholt werden muss, bis sich der erwünschte Effekt einstellt. Zum anderen stellen die verwendeten Chemikalien eine erhebliche Belastung der Umwelt dar, was angesichts eines gesteigerten Umweltbewusstseins seitens der Bevölkerung nicht mehr hinnehmbar ist.In chemical pipe cleaning special cleaning liquids, usually acids of a certain concentration, are filled into the encrusted pipe with the intention of dissolving the incrustations. However, since the chemical reactions in the pipe to be cleaned run unchecked, the cleaning success is uncertain, so that the process may have to be repeated more often, until the desired effect sets. On the other hand, the chemicals used represent a significant burden on the environment, which is no longer acceptable given the increase in environmental awareness on the part of the population.
Bei der mechanischen Rohrreinigung werden meist elektrisch angetriebene Rohrreinigungsvorrichtungen, wie zum Beispiel flexible Spiralen, von Hand in das Rohr eingeführt und in Rotation versetzt. Wegen ihrer Fähigkeit, auch feste Ablagerungen von den Rohrinnenwänden zu beseitigen, sind solche Vorrichtungen weit verbreitet, stoßen jedoch doch dort an ihre Grenzen, wo die Innenablagerungen schlagresistenter als die umgebenden Rohrwände selbst sind. Dies ist insbesondere bei Kunststoffrohren der Fall, beispielsweise PVC-Rohren, die vielfach schon vor über 20 Jahren in Gebäuden verlegt worden sind. Im Laufe der Jahre haben sich aus solchen Kunststoffrohren die beigefügten Weichmacher gelöst, mit der Folge einer extremen Versprödung der Rohre und der Gefahr eines Bruchs bei Schlagbeanspruchung durch mechanische Rohrreinigungsvorrichtung.In mechanical pipe cleaning usually electrically driven pipe cleaning devices, such as flexible spirals, manually inserted into the tube and set in rotation. Because of their ability to also remove solid deposits from the pipe interior walls, such devices are widely used, yet they reach their limits where the interior deposits are more impact resistant than the surrounding pipe walls themselves. This is the case in particular with plastic pipes, for example PVC pipes, which have often been laid in buildings over 20 years ago. Over the years, the plasticizers have dissolved from such plastic pipes, with the result of extreme embrittlement of the pipes and the risk of breakage during impact stress by mechanical pipe cleaning device.
Schließlich ist als dritte Rohrreinigungsmethode die hydrodynamische Rohrreinigung bekannt, die sich vor allem bei der Kanalreinigung etabliert hat. Zum Stand der Technik seien beispielhaft die
In der Praxis stellt sich jedoch häufig das Problem, dass das zu sanierende Rohr nur von dem im Gebäudeinneren liegenden Ende der Rohrleitung zugänglich ist, also beispielsweise von einem Waschbecken- oder Toilettenablauf. Der Spülkopf muss daher von einem Wohnraum aus in die Rohrleitung eingeführt werden, was dazu führt, dass die Rückstoßöffnungen zur Erzeugung der Vortriebskraft in Richtung der Einschuböffnung gerichtet sind. Im Zuge der Reinigung des Rohres gelangen also große Volumina an Flüssigkeit zur Einschuböffnung, die dort aufgefangen werden müssen. Aufgrund der großen Mengen und der darin enthaltenen, hygienisch oft bedenklichen Feststoffe ist dies kaum möglich mit der Folge größerer Verschmutzungen oder Überschwemmungen im Wohnungsinneren.In practice, however, often poses the problem that the pipe to be rehabilitated is accessible only from the lying inside the building end of the pipe, so for example, from a sink or toilet drain. The flushing head must therefore be introduced from a living space in the pipeline, which means that the recoil openings are directed to generate the driving force in the direction of the insertion opening. In the course of cleaning the tube thus reach large volumes of liquid to the insertion opening, which must be collected there. Due to the large quantities and contained therein, hygienic often questionable solids, this is hardly possible with the result of greater pollution or flooding in the interior of the apartment.
Ein weiterer Nachteil bekannter hydrodynamischer Rohrreinigungsverfahren mittels derartiger Spülköpfe ist grundsätzlicher Natur und basiert auf deren Rückstoßprinzip zur Erzeugung einer Vorwärtsbewegung im Rohr. Zur Entfernung harter Feststoffablagerungen, wie Kalk- oder Urinstein, an den Rohrinnenwänden ist ein Druckstrahl mit hoher kinetischer Energie notwendig, das heißt, es sind unter Umständen Drücke von bis zu mehreren Hundert bar notwendig. Zwar werden bekannte Spülköpfe auch mit hohen Drücken von bis zu 200 bar und mit entsprechend hohen Durchflussmengen an Reinigungsflüssigkeit von mehreren 100 l/min bis zu 1400 l/min betrieben, jedoch wird die Energie des aus den Düsen austretenden Wassers nur zu einem Bruchteil in Reinigungsleistung umgesetzt. Der überwiegende Teil dient dem Vortrieb des Spülkopfes durch die Rohrleitung. Dies ist auf dem Gebiet der Kanalreinigung sicherlich hinnehmbar und vielleicht sogar erwünscht, weil hier beim Durchqueren langer Kanalstrecken die bei der Sanierung anfallenden Flüssigkeitsvolumina als Transportmedium genutzt werden, um die auf der Rohrsohle lose aufliegenden Fremdkörper, wie zum Beispiel körnige Ablagerungen oder Stein- und Kiesansammlungen, in einem Spülstrom der Kläranlage zuzuleiten.Another disadvantage of known hydrodynamic pipe cleaning method by means of such rinsing heads is fundamental in nature and is based on their recoil principle for generating a forward movement in the pipe. To remove hard solid deposits, such as lime or urine scale, on the pipe inner walls, a pressure jet with high kinetic energy is necessary, that is, it may be necessary pressures of up to several hundred bar. Although known rinsing heads are also operated at high pressures of up to 200 bar and with correspondingly high flow rates of cleaning liquid of several 100 l / min up to 1400 l / min, however, the energy of the water leaving the nozzles becomes only a fraction of the cleaning power implemented. The predominant part is the propulsion of the flushing head through the pipeline. This is certainly acceptable in the field of sewer cleaning, and perhaps even desirable, because here, when traversing long channel sections, the volumes of liquid recovered during remediation are used as transport medium around the debris loosely resting on the bottom of the pipe, such as granular deposits or aggregates of stone and gravel to be fed to the sewage treatment plant in a flushing stream.
Anders gestaltet sich jedoch die Ausgangslage bei Rohren im Hausbereich, wo die Störungen häufig durch Verkrustungen aus Urinstein verursacht werden. Diese extrem widerstandsfähigen Ablagerungen lassen sich mit oben beschriebenen Vorrichtung nicht zufriedenstellend beseitigen. Entweder besitzt der Druckstrahl zu wenig Energie, da ein Teil der vom Kompressor erzeugten Energie für den Vortrieb benötigt wird, oder die Vorrichtung ist bei Erzeugung eines wirksamen Druckstrahls derart überdimensioniert, dass zwar die Energie des Druckstrahls zur Entfernung der Inkrustationen ausreichen würde, die dabei am Rohrende im Wohnungsbereich anfallenden Wassermengen jedoch nicht mehr zu kontrollieren sind.However, the situation is different for pipes in the home, where the disturbances are often caused by incrustations of urine stone. These extremely resistant deposits can not be satisfactorily eliminated with the device described above. Either the pressure jet has too little energy, since a portion of the energy generated by the compressor is required for propulsion, or the device is so oversized when generating an effective pressure jet, that although the energy of the pressure jet would be sufficient to remove the incrustations, the Pipe end in the housing area incurred amounts of water, however, are no longer to control.
Das Dokument
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung bereit zu stellen, mit dem durch Inkrustation, Ablagerungen, Betonverschlüsse, Wurzeleinwachsungen und dergleichen verursachte Störstellen in Rohrleitungen schnell und wirkungsvoll und dabei rohrschonend und wirtschaftlich entfernt werden können.Against this background, the object of the invention is to provide a method and a device, with which incrustations in pipelines caused by incrustation, deposits, concrete closures, root ingrowths and the like can be removed quickly and efficiently and at the same time gentle on the tube and economically.
Gelöst wird diese Aufgaben durch ein Verfahren mit den Merkmalen des Patentanspruches 1, sowie eine Vorrichtung mit den Merkmalen des Patentanspruches 5.These objects are achieved by a method having the features of
Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.Advantageous developments emerge from the subclaims.
Die Erfindung nutzt ebenso wie der eingangs erwähnte Stand der Technik die kinetische Energie eines unter hohem Druck und hoher Geschwindigkeit auf eine Störstelle treffenden Flüssigkeitsstrahls zur Beseitigung der Störung. Gemäß der Erfindung wird die Vorschubkraft für die Druckstrahldüse allein mittels eines Schubstabs erzeugt. Die dem Druckstrahl innewohnende kinetische Energie wird daher vollständig und effektiv in Arbeitsleistung zur Beseitigen der Störstelle umgesetzt, so dass eine im Vergleich zu bekannten Hochdruckspültechniken geringere Pumpen- oder Kompressorleistung ausreicht, um exzellente Sanierungsergebnisse zu erzielen. Es wird also mit weniger Gesamtenergie ein besseres Arbeitsergebnis erreicht. Dies eröffnet die Möglichkeit, die gerätetechnische Ausstattung wie zum Beispiel den Kompressor zur Erzeugung des notwendigen Förder- und Reinigungsdrucks oder die Druckstrahldüse kleiner zu dimensionieren, was sich sowohl bei der Anschaffung als auch Handhabung der Gerätschaften als vorteilhaft erweist.The invention, as well as the prior art mentioned at the outset, utilizes the kinetic energy of a fluid jet impinging upon an impurity under high pressure and high velocity to eliminate the disturbance. According to the invention, the feed force for the pressure jet nozzle is generated solely by means of a push rod. The kinetic energy inherent in the pressure jet is therefore fully and effectively translated into work to eliminate the impurity, so that lower pump or compressor capacity is sufficient to achieve excellent remediation results compared to known high pressure wash techniques. So it is achieved with less total energy a better work result. This opens up the possibility of dimensioning the device-related equipment such as the compressor for generating the necessary conveying and cleaning pressure or the pressure jet nozzle smaller, which proves to be advantageous both in the purchase and handling of the equipment.
Der für die Erfindung notwendige Druck hängt dabei außer von der gewählten Düsen- und Schlauchgeometrie entscheidend auch von der Art, insbesondere dem Material, der zu sanierenden Rohrleitung ab. Bei hochfesten Stahlrohrleitungen kann mit Wasserdrücken von bis zu 300 bar im Sanierungsbetrieb gearbeitet werden, während die teilweise sehr spröden PVC-Rohrleitungen im Hausbereich bei der Reinigung nur reduzierten Wasserdrücken von bis zu maximal 150 bar ausgesetzt werden sollten. Im Regelfall beträgt der Betriebsdruck beim Einsatz im häuslichen Bereich jedoch unter 250 bar. Diese in Relation zu bekannten hydrodynamischen Rohrspülverfahren hohen Betriebsdrücke haben den Vorteil, dass nur sehr geringe Mengen an Arbeitsflüssigkeit in einer Größenordnung zwischen 10 l/min und 25 l/min benötigt werden. Während bei den bekannten hydrodynamischen Rohrspülverfahren wegen der gleichzeitig zum Vortrieb und zur Reinigung benötigten hohen Wasserdurchflussmengen ein Vielfaches an Wassermenge vorzuhalten ist, die zum Einsatzort entweder im Tanklastwagen transportiert oder einem Hydranten entnommen und dann mit großen und leistungsstarken Pumpen dem Spülkopf zugeführt werden muss, genügt für die Durchführung des erfindungsgemäßen Verfahrens bzw. den Betrieb der erfindungsgemäßen Vorrichtung in den meisten Fällen bereits der von einer häuslichen Wasserzapfstelle bereitgestellte Wasservolumenstrom. Dies macht die erfindungsgemäße Vorrichtung bei gleichzeitig verbesserter Wirkung nicht nur platzsparender sondern auch erheblich energiesparender als bekannte Vorrichtungen, so dass der den Druck erzeugende Kompressor in den meisten Fällen ohne Starkstromanschluss auskommt. Sollte die aus dem häuslichen Wasseranschluss verfügbare Wassermenge nicht reichen, so kann die erforderliche Wassermenge auch mittels eines Behälters bereit gestellt werden, der aufgrund der geringen benötigten Wassermengen relativ klein dimensioniert sein kann.The pressure necessary for the invention depends not only on the selected nozzle and tube geometry crucial also of the type, in particular the material to rehabilitating pipeline. For high-strength steel pipelines, it is possible to work with water pressures of up to 300 bar in the remediation operation, while the sometimes very brittle PVC pipelines in the domestic area should only be exposed to reduced water pressures of up to 150 bar during cleaning. As a rule, however, the operating pressure for use in the domestic sector is below 250 bar. These high operating pressures in relation to known hydrodynamic pipe flushing methods have the advantage that only very small quantities of working fluid in the order of magnitude of between 10 l / min and 25 l / min are required. While in the known hydrodynamic Rohrspülverfahren due to the simultaneously required for propulsion and cleaning high water flow rates a multiple amount of water is to be transported to the place of use either tanker or taken from a hydrant and then fed with large and powerful pumps the rinsing, is sufficient the implementation of the method according to the invention or the operation of the device according to the invention in most cases already provided by a domestic Wasserzapfstelle water volume flow. This makes the device according to the invention at the same time improved effect not only space-saving but also considerably less energy than known devices, so that the pressure-generating compressor gets along in most cases without power connection. If the amount of water available from the domestic water connection is not sufficient, then the required amount of water can also be provided by means of a container, which can be relatively small due to the small amounts of water required.
Ein weiterer Vorteil der Erfindung ergibt sich aus deren universeller Anwendbarkeit. So können Störstellen, unabhängig davon, ob es sich dabei um eine einfache Versehrnutzung mit Fett, Fäkalien, Papier, Wurzelwerk etc., oder aber um harte Rohrwandablagerungen, wie beispielsweise Kalk- oder Urinstein, Zement, Mörtel oder Beton handelt, mit einer Vorrichtung schnell und zuverlässig entfernt werden. Es hat sich sogar gezeigt, das die Erfindung in der Lage ist, Vollverschlüsse aus Beton sukzessive abzutragen, wozu der Betriebsdruck vorteilhafterweise auf 250 bar bis 500 bar oder auch bis zu 600 bar und mehr gesteigert wird.Another advantage of the invention results from its universal applicability. Thus, defects, whether it be a simple Versehrnutzung with fat, fecal matter, paper, root system, etc., or hard pipe wall deposits, such as lime or urine brick, cement, mortar or concrete, with a device quickly and be removed reliably. It has even been shown that the invention is capable of successively removing solid closures of concrete, to which the operating pressure is advantageously increased to 250 bar to 500 bar or up to 600 bar and more.
Der gezielte Einsatz der Erfindung im Bereich der Störstelle wird durch Einschieben einer an einem Druckschlauch angeschlossenen Druckstrahldüse mittels eines Schubstabs bis zur Störstelle, durch anschließendes Herstellen eines vorbestimmten Abstandes der Druckstrahldüse zur Störstelle und durch anschließendes Beaufschlagen der Druckstrahldüse über den angeschlossenen Druckschlauch mit einer unter Druck stehenden Arbeitsflüssigkeit erreicht. Bei sich über den ganzen Rohrinnenumfang erstreckenden Inkrustationen hängt die Größe des Abstandes von dem Strahlwinkel der Druckstrahldüse ab, wobei die Austrittsöffnung der Druckstrahldüse so weit von der Störstelle entfernt ist, dass der aus der Druckstrahldüse austretende Druckstrahl an der Störstelle den gesamten Rohrinnenumfang erfasst. Je kleiner also der Strahlwinkel ist, desto weiter muss die Druckstrahldüse von der Störstelle entfernt werden, damit dem austretenden Druckstrahl genügend Wegstrecke bereitgestellt wird, um an der Störstelle schließlich auf die betroffene Rohrwan zu treffen. Dabei ist erfindungsgemäß einen Druchstrahl in Form eines rotierenden Punktstrahls vorgesehen. Auch bei einem Vollverschluss, z.B. aus Beton, wird durch Einhalten eines vorbestimmten Abstandes die Wirksamkeit des Druckstrahls optimiert. Erfindungsgemäß ist einen Strahlwinkel, unter welchem der erzeugte Druckstrahl in Bezug zur Längsachse der Druckstrahldüse die stirnseitige zentrale Austrittsöffnung verläßt, zwischen 15° und 45°.The targeted use of the invention in the field of impurity is by inserting a connected to a pressure hose pressure jet nozzle by means of a push rod to the point of failure, then by establishing a predetermined distance of the pressure jet nozzle to the point of failure and by subsequently pressurizing the pressure jet nozzle via the connected pressure hose with a pressurized Working fluid reached. In incrustations extending over the entire tube inner circumference, the size of the distance depends on the jet angle of the pressure jet nozzle, wherein the outlet opening of the pressure jet nozzle is so far away from the point of failure that the pressure jet emerging from the pressure jet nozzle at the point of impurity the entire Internal pipe circumference recorded. Thus, the smaller the jet angle, the farther the pressure jet nozzle must be removed from the defect, so that sufficient distance is provided to the exiting pressure jet in order finally to hit the affected pipe wall at the defect site. In this case, a Druchstrahl is provided in the form of a rotating spot beam according to the invention. Even with a full closure, such as concrete, the effectiveness of the pressure jet is optimized by maintaining a predetermined distance. According to the invention, a jet angle at which the generated pressure jet leaves the frontal central outlet opening in relation to the longitudinal axis of the pressure jet nozzle is between 15 ° and 45 °.
Falls die gegebenen Umstände es erlauben, wird die Druckstrahldüse mit Hilfe des Schubstabs in Gefällerichtung der Rohrleitung, also in Fließrichtung, in die Rohrleitung eingeschoben, so dass der Druckstrahl zusammen mit den gelösten Inkrustationen in Richtung des Kanalsystems abgeleitet wird. Da bei der Erfindung kein nach hinten gerichteter Druckstrahl vorhanden ist, besteht somit keine Gefahr, dass an der Zugangsöffnung zur Rohrleitung Flüssigkeit austritt und dort Schaden anrichtet ist.If the circumstances allow it, the pressure jet nozzle is pushed into the pipeline with the aid of the push rod in the direction of the pipe's slope, ie in the direction of flow, so that the pressure jet is discharged together with the dissolved incrustations in the direction of the duct system. Since there is no backward directed jet of pressure in the invention, there is thus no risk that liquid will escape at the access opening to the pipeline and cause damage there.
Aber selbst in dem Fall, dass die Arbeitsflüssigkeit zur Einschuböffnung zurückfließt, beispielsweise weil die Störstelle aus einem vollständigen Verschluss des Rohrquerschnitts besteht oder weil die Einschuböffnung in Fließrichtung stromabwärts der Störstelle liegt, so ist es aufgrund der wesentlich geringeren anfallenden Mengen an Flüssigkeit nun möglich, diese im Bereich der Einschuböffnung aufzufangen und geordnet zu entsorgen.But even in the case that the working fluid flows back to the insertion opening, for example, because the impurity consists of a complete closure of the tube cross-section or because the insertion opening in the flow direction downstream of the impurity, it is now possible due to the much lower accumulating amounts of liquid catch in the area of the insertion opening and disposed of properly.
Ein solcher Fall, bei dem die Einschuböffnung stromabwärts der Störstelle liegt, tritt beispielsweise bei Fallrohrleitung im Hausbereich auf, wenn die erfindungsgemäße Vorrichtung über eine entsprechende Öffnung im Gebäudekeller eingeschoben wird. Um aber auch bei derartigen Einsätzen mit einem Druckstrahl in Fließrichtung arbeiten zu können, sieht eine geeignete Ausführungsform der Erfindung vor, die Druckstrahldüse über einen 180°-Rohrbogen mit dem Schubstab zu verbinden, um die Orientierung des Druckstrahls zu ändern. Dadurch ist garantiert, dass während der hydrodynamischen Anwendung keine Flüssigkeit und Verunreinigungen an den wohnungsseitigen Rohrleitungsenden austreten.Such a case, in which the insertion opening is downstream of the defect occurs, for example, in the case of downpipes in the house area, when the device according to the invention is inserted through a corresponding opening in the building basement. However, in order to be able to work with a pressure jet in the direction of flow even in such applications, a suitable embodiment of the invention provides for connecting the pressure jet nozzle to the push rod via a 180 ° bend in order to change the orientation of the pressure jet. This guarantees that during the hydrodynamic application no liquid and impurities escape at the housing-side pipe ends.
Der aus der Druckstrahldüse austretende Druckstrahl ist gemäß der vorliegenden Erfindung ein rotierender Punktstrahl. Im Falle harter, feststoffartiger Ablagerungen zerteilt der auftreffende Druckstrahl die anhaftenden Ablagerungen wirkungsvoll, ohne dabei die Rohrwand zu beschädigen. Durch einen energiereichen, rotierenden Punktstrahl können sogar betonartige Komplettverschlüsse, wie sie in Folge von Fahrlässigkeiten während der Bauphase von Gebäuden auftreten können, sukzessive abgetragen und fortgespült werden.The pressure jet emerging from the pressure jet nozzle is a rotating spot beam according to the present invention. In the case of hard, solid-like deposits, the impinging pressure jet effectively splits the adhering deposits without damaging the pipe wall. By means of a high-energy, rotating spot beam, even concrete-type complete closures, such as can occur as a result of negligence during the construction phase of buildings, can be successively removed and washed away.
Der Schubstab zum Einschieben der Druckstrahldüse einer erfindungsgemäßen Vorrichtung in eine Rohrleitung zeichnet sich durch eine Druckfestigkeit und Biegesteifigkeit aus, die ausreichend groß sind, um die druckabhängigen Rückstoß- und Torsionskräfte aus dem Druckstrahl aufzunehmen und gleichzeitig Vorschubkräfte auf die Druckstrahldüse zu übertragen. Da in den meisten Anwendungsfällen die zu sanierende Rohrleitung in dem Teilabschnitt von der Einschuböffnung bis zur Störstelle einen oder mehrere Richtungswechsel aufweist, ist neben der Druckstabilität die Bogengängigkeit des Schubstabs ein weiterer bestimmender Faktor für die geeignete Biegesteifigkeit des Schubstabs. Geeignete Schubstäbe bestehen beispielsweise aus glasfaserverstärktem Kunststoff mit einem Durchmesser von 5 mm bis 12 mm und können sowohl von axial zusammengesetzten stab- oder stangenförmigen Elementen oder einem quasi Endlosstab gebildet sein, der in der erforderlichen Länge von einer Haspel abgewickelt wird. Mit solchen Schubstäben lassen sich Druckstrahldüsen über Längen von bis zu 150 m und mehr in Rohrleitungen einschieben.The push rod for inserting the pressure jet nozzle of a device according to the invention in a pipeline is characterized by a compressive strength and flexural rigidity, which are sufficiently large to absorb the pressure-dependent recoil and torsional forces from the pressure jet and at the same time to transmit feed forces to the pressure jet nozzle. Since in most cases the pipeline to be rehabilitated has one or more changes of direction in the section from the insertion opening to the point of failure, in addition to the pressure stability, the bowability of the push rod is another determining factor for the suitable bending stiffness of the push rod. Suitable push rods are made for example of glass fiber reinforced plastic with a diameter of 5 mm to 12 mm and can be formed by either axially assembled rod or rod-shaped elements or a quasi endless rod, which is unwound in the required length of a reel. With such thrust rods, pressure jet nozzles can be pushed into pipes over lengths of up to 150 m and more.
Der Einsatz eines Schubstabs als vortriebserzeugendes Mittel bringt ferner den Vorteil mit sich, dass das Bedienpersonal am Einsatzort die Druckstrahldüse mit Muskelkraft oder motorbetrieben von einer beliebigen Einführungsöffnung aus startend, gezielt in das Rohrsystem über Biegungen und Abzweige hindurch vorwärts schieben kann, bis die Druckstrahldüse schließlich den Rohrabschnitt mit der Störstelle erreicht hat. Das Erreichen der Störstelle wird entweder "online" anhand eines in der nahen Umgebung der Druckstrahldüse montierten Kamerasystems überwacht oder "blind" durch Anschlag der Druckstrahldüse an der Störstelle festgestellt. Ebenfalls mit Hilfe des Schubstabs kann nun nachfolgend die Druckstrahldüse zur Entfaltung der optimalen Reinigungsleistung zunächst um eine vorbestimmte Distanz von dieser Verstopfungsstelle entfernt werden, nämlich durch Zurückziehen, also entgegen der Einführungsrichtung oder, bei Verwendung eines 180°- Rohrbogens, durch weiteres Einschieben in Einschubrichtung durch den verengten oder verstopften Abschnitt hindurch. Beim anschließenden Beaufschlagen der Druckstrahldüse mit Arbeitsflüssigkeit zerkleinert der Druckstrahl durch seine hohe Aufprallenergie die Inkrustationen, Ablagerungen oder dergleichen und spült diese in Fließrichtung des Rohres weg. Bei diesen Arbeitsschritten gibt der Schubstab dem Bedienpersonal eine Rückmeldung und erlaubt so ein präzises und feinfühliges Führen der Druckstrahldüse innerhalb der Rohrleitung und zwar sowohl vor- als auch rückwärts. In Kombination mit einem Kamerasystem können auf diese Weise Störstelle äußerst zielgerichtet und damit äußerst wirkungsvoll beseitigt werden.The use of a push rod as a propulsion-generating means also brings with it the advantage that the operator at the site the pressure jet nozzle with muscle power or motor driven starting from any inlet opening, selectively pushed into the pipe system through bends and branches forward until the pressure jet nozzle finally the Pipe section has reached with the impurity. The reaching of the defect is monitored either "online" using a mounted in the immediate vicinity of the pressure jet nozzle camera system or "blind" determined by abutting the pressure jet nozzle at the fault. Also with the help of the push rod can now be removed to unfold the optimal cleaning performance first by a predetermined distance from this blockage point, namely by retraction, ie opposite to the direction of insertion or, when using a 180 ° - tube bend, by further insertion in the insertion direction by the pressure jet nozzle through the narrowed or blocked section. During the subsequent pressurization of the pressure jet nozzle with working fluid, the pressure jet, due to its high impact energy, crushes the incrustations, deposits or the like and rinses them away in the flow direction of the tube. In these steps, the push rod gives the operator a feedback and thus allows a precise and sensitive guiding of the pressure jet nozzle within the pipeline, both forward and backward. In combination with a camera system, it is thus possible to eliminate defects in a highly targeted manner and thus extremely effectively.
Um den in das Rohr vordringenden Endabschnitt der erfindungsgemäßen Vorrichtung mit der Druckstrahldüse am Ende flexibler zu gestalten, um damit die Bogengängigkeit im Bereich von Rohrabzweigungen und Rohrbögen zu verbessern, weist gemäß einer vorteilhaften Ausführungsform der Erfindung der vor der Druckstrahldüse liegende Endabschnitt des Schubstabs eine geringere Biegsteifigkeit auf als der restliche Schubstab. Das kann beispielsweise durch den Einsatz einer Stahldruckfeder geschehen, die mit ihrem ersten Ende an der Druckstrahldüse und mit ihrem zweiten Ende an dem Schubstab befestigt ist. Eine solche Ausführungsform hat zudem den Vorteil, dass der Druckschlauch im letzten Abschnitt vor der Druckstrahldüse innerhalb der Druckfeder geführt und somit von dieser gestützt und vor mechanischer Beanspruchung geschützt ist.In order to make the end penetrating into the pipe end portion of the device according to the invention with the pressure jet nozzle at the end more flexible, so as to improve the arcability in the range of pipe branches and pipe bends, according to an advantageous embodiment of the invention, the front of the pressure jet nozzle end portion of the push rod has a lower bending stiffness on as the remaining push rod. This can be done, for example, by the use of a steel compression spring, which is fastened with its first end to the pressure jet nozzle and with its second end to the push rod. Such an embodiment also has the advantage that the pressure hose is guided in the last section before the pressure jet nozzle within the compression spring and thus supported by this and protected from mechanical stress.
Zum Schutz der Druckstrahldüse vor Beschädigung oder übermäßigem Verschleiß oder zur Anpassung der Vorrichtung an die spezifischen Gegebenheiten vor Ort ist die Druckstrahldüse innerhalb eines Gehäuses eingesetzt. Das Gehäuse besitzt beispielsweise die Form einer hohlzylindrischen Hülse, in deren Aufnahme sich die Druckstrahldüse axial einstecken und mittels radialer Gewindeschrauben oder Klemmstifte feststellen lässt. Das Gehäuse kann auch von mehreren Schalen gebildet sein, vorzugsweise zwei Halbschalen, die zusammengefügt die Druckstrahldüse umgeben und lediglich den Bereich der Düsenöffnung und des Anschlusses an den Schubstab frei lassen. Vorteilhafterweise können auch Druckstrahldüsen zum Einsatz kommen, die einen im Düsenkörper eingesteckten, die Spritzstahlgeometrie bestimmenden Düseneinsatz aufweisen. Zur Veränderung der Spritzstrahlgeometrie ist es folglich nur noch erforderlich, den Düseneinsatz anstatt des gesamten Düsenkörpers auszuwechseln.To protect the pressure jet nozzle against damage or excessive wear or to adapt the device to the specific conditions on site, the pressure jet nozzle is inserted within a housing. The housing has, for example, the shape of a hollow cylindrical sleeve, in the receptacle of which the pressure jet nozzle can be inserted axially and fixed by means of radial threaded screws or clamping pins. The housing may also be formed by a plurality of shells, preferably two half-shells which, when joined together, surround the pressure jet nozzle and leave only the area of the nozzle opening and the connection to the push rod free. Advantageously, pressure jet nozzles can also be used which have a nozzle insert inserted in the nozzle body and determining the spray steel geometry. To change the spray jet geometry, it is therefore only necessary to replace the nozzle insert instead of the entire nozzle body.
Zur Verbesserung der Führung und Positioniergenauigkeit der Hochdruckreinigungsdüse im zu durchquerenden Rohrsystem sowie zur Bewältigung größerer Distanzen kann die Rohrreinigungsvorrichtung zusätzlich ein rohrgängiges Fahrwerk umfassen, auf welchem die Hochdruckreinigungsdüse selbst und gegebenenfalls der anschließende Längsabschnitt des Duckschlauches angeordnet sind. Vorteilhafterweise verfügt das Fahrwerk über einen integrierten Antrieb, beispielsweise Elektroantrieb, zum selbsttätigen Befahren des Rohrsystems.To improve the guidance and positioning accuracy of the high-pressure cleaning nozzle in the pipe system to be traversed and to handle larger distances, the pipe cleaning device may additionally comprise a tubular running gear, on which the high pressure cleaning nozzle itself and optionally the subsequent longitudinal portion of the Duckschlauches are arranged. Advantageously, the chassis has an integrated drive, such as electric drive, for automatically driving on the pipe system.
Das Auffinden der Störstelle und damit das Auffinden der Position, bis zu welcher die Druckstrahldüse im ersten erfindungsgemäßen Verfahrensschritt in das Rohr eingeschoben werden muss, wird durch den optionalen Einsatz einer Rohrinspektionskamera stark erleichtert, die in der nahen Umgebung der Druckstrahldüse angebracht ist und in Richtung des Druckstrahls zeigt. Über eine an die Kamera angeschlossene Videodatenleitung, die entlang des Druckschlauchs zurück zur Einschuböffnung der erfindungsgemäßen Vorrichtung geführt ist, werden die von der Kamera aufgenommenen Videobilder des Rohrinnenraums dem Bedienpersonal an einem entsprechenden Monitor angezeigt. So kann nicht nur die Störstelle problemlos aufgefunden und analysiert, sondern auch die Beseitigung der Störstelle online überwacht werden.The finding of the defect and thus finding the position up to which the pressure jet nozzle in the first step of the invention must be inserted into the pipe is greatly facilitated by the optional use of a pipe inspection camera, which is mounted in the vicinity of the pressure jet nozzle and in the direction of Pressure jet shows. About a connected to the camera video data line along the pressure hose back to the insertion opening of the invention Device is performed, recorded by the camera video images of the pipe interior are displayed to the operator on a corresponding monitor. So not only can the defect be found and analyzed easily, but also the removal of the defect can be monitored online.
Die in das Rohr einzuführenden Komponenten, umfassend einen Druckschlauch, einen Schubstab und gegebenenfalls Versorgungsleitungen für das Kamerasystem, sind vorteilhafterweise miteinander verbunden, so dass quasi ein zusammengefasster Strang entsteht. Dazu können diese Komponenten in axialen Abständen punktuell längskraftschlüssig miteinander verbunden oder aber innerhalb einer schlauchförmigen Umhüllung geführt sein. Auf diese Weise wird nicht nur die Handhabung der Vorrichtung erleichtert, sondern die Leitungen ist im Falle der vollständigen Umhüllung auch vor Beschädigung und Verschmutzung geschützt.The components to be introduced into the tube, comprising a pressure hose, a push rod and, if appropriate, supply lines for the camera system, are advantageously connected to one another, so that virtually a combined strand is created. For this purpose, these components can be selectively connected at axial distances with longitudinal restraint or guided within a tubular envelope. In this way, not only the handling of the device is facilitated, but the lines is protected in the case of full wrap from damage and contamination.
Um eine einfache und weitestgehende Zerlegbarkeit der Vorrichtung zu erreichen, sind die einzelnen Komponenten wie zum Beispiel Druckstrahldüse, Druckfeder, Schubstab, Kamera und dergleichen mittels lösbarer Bajonett- oder andere Arten von Schnellverbindungen miteinander verbunden. Dies erlaubt den schnellen Austausch von nicht mehr funktionsfähigen Komponenten, den einfachen Umbau der Vorrichtung für einen anderen Einsatzzweck unter Verwendung gleicher Teile und das platzsparende Verstauen der Vorrichtung für den Transport zum Einsatzort.In order to achieve a simple and extensive dismantling of the device, the individual components such as pressure jet nozzle, compression spring, push rod, camera and the like are connected to each other by means of detachable bayonet or other types of quick connectors. This allows the rapid replacement of non-functional components, the simple conversion of the device for a different purpose using the same parts and the space-saving stowage of the device for transport to the job site.
Zur optimalen Ausnutzung des zur Längsachse der Druckstrahldüse in der Regel symmetrischen Sprühbilds, kann es für manche Anwendungen, wie zum Beispiel vollumfängliche Inkrustationen, von Vorteil sein, die Druckstrahldüse möglichst zentral innerhalb des zu reinigenden Rohres zu positionieren. Zu diesem Zweck kann eine Zentrierhilfe nach Art einer Überwurfmutter oder Überschiebehülse vorgesehen sein, die die Hochdruckreinigungsdüse am Außenumfang umgreift und durch Abstützen an der Rohrinnenwandung die Austrittsöffnung der Druckstrahldüse auf oder in die Nähe der Rohrlängsachse anhebt. Bei Ablagerungen im Sohlbereich hingegen genügt es im Regelfall, die Druckstrahldüse beim Einschieben lediglich auf der Rohrsohle aufliegen zu lassen, so dass die Düsenöffnung in etwa auf Höhe des unteren Drittelspunkts des Rohrinnendurchmessers liegt.For optimum utilization of the spray pattern, which as a rule is symmetrical with respect to the longitudinal axis of the pressure jet nozzle, it may be advantageous for some applications, such as full incrustations, to position the pressure jet nozzle as centrally as possible within the pipe to be cleaned. For this purpose, a centering aid may be provided in the manner of a union nut or sliding sleeve, which surrounds the high-pressure cleaning nozzle on the outer circumference and lifts by support on the pipe inner wall, the outlet opening of the pressure jet nozzle on or in the vicinity of the pipe longitudinal axis. In the case of deposits in the sole region, on the other hand, it is generally sufficient to allow the pressure jet nozzle to rest on the sole of the pipe during insertion, so that the nozzle opening lies approximately at the level of the lower third of the inner diameter of the pipe.
Das erfindungsgemäße Verfahren bzw. die erfindungsgemäße Vorrichtung sind besonders vorteilhaft bei der Sanierung von Rohrleitungen mit Durchmessern von 70 mm bis 200 mm im Hausbereich einsetzbar. Jedoch ist es ebenso möglich, mit einem solchen Verfahren bzw. einer solchen Vorrichtung Rohrleitungen und Kanäle größerer Nennweiten zu sanieren. Auch kann das Verfahren bzw. die Vorrichtung neben der Beseitigung von Inkrustationen und Vollverschlüssen ebenso zur Reinigung von Grundkanälen und zum Entfernen von eingewachsenen Busch- bzw. Baumwurzeln eingesetzt werden.The inventive method and the device according to the invention are particularly advantageous in the renovation of pipelines with diameters of 70 mm to 200 mm used in the home. However, it is also possible to rehabilitate pipelines and channels of larger nominal sizes with such a method and such a device. Also For example, in addition to the removal of incrustations and full closures, the method and / or device can also be used to clean ground canals and to remove ingrown shrubs or tree roots.
Die zur Anwendung kommenden Drücke liegen im Regelfall unter 250 bar, können aber für spezielle Sonderfälle (z.B. Vollverschluss durch hochfesten Beton) bis zu 600 bar und mehr reichen. Maßgebend für die Druckobergrenze ist die Festigkeit der Rohrleitung, die nicht zu Schaden kommen darf. Die Austrittsöffnungen der Druckstrahldüsen variieren in einer Größenordnung von 0,2 mm bis 1,2 mm, vorzugsweise von 0,3 mm bis 0,7 mm. Der Bedarf an Arbeitsflüssigkeit liegt im Normalfall zwischen 10 l/min und 25 l/min.As a rule, the pressures used are below 250 bar, but can reach up to 600 bar and more for special applications (eg full closure with high-strength concrete). Decisive for the upper pressure limit is the strength of the pipeline, which must not be damaged. The outlet openings of the pressure jet nozzles vary in the order of 0.2 mm to 1.2 mm, preferably from 0.3 mm to 0.7 mm. The demand for working fluid is normally between 10 l / min and 25 l / min.
Die nachfolgenden Zeichnungen zeigen ein Ausführungsbeispiel der erfindungsgemäßen Rohrreinigungsvorrichtung in jeweils schematischen Darstellungen. Es zeigen
- Fig. 1
- eine Seitenansicht auf den innerhalb einer zu sanierenden Rohrleitung befindlichen Endabschnitt einer erfindungsgemäßen Vorrichtung,
- Fig. 2
- eine vergrößerte Seitenansicht des vorderen Endabschnitts der in
Fig. 1 dargestellten Vorrichtung, - Fig. 3
- eine vergrößerte Seitenansicht des die Kamera aufnehmenden Längsabschnitts der in den
Fig. 1 und 2 dargestellten Vorrichtung, - Fig. 4
- eine vergrößerte Detailansicht des Anschlussbereichs der Kamera an die übrige Vorrichtung,
- Fig. 5
- eine Seitenansicht auf eine zweite Ausführungsform einer erfindungsgemäßen Vorrichtung,
- Fig. 6
- eine Seitenansicht auf eine Halbschale eines Gehäuses für eine Druckstrahldüse einer erfindungsgemäßen Vorrichtung entlang der in
Fig. 7 dargestellten Linie VI-VI, - Fig. 7
- einen Querschnitt durch das in
Fig. 6 dargestellte Gehäuse entlang der dortigen Linie VII - VII und - Fig. 8
- einen Längsschnitt durch das Ende einer erfindungsgemäßen Vorrichtung mit einem Gehäuse entsprechend der
Figuren 6 .und 7
- Fig. 1
- a side view of the located within a pipeline to be rehabilitated end portion of a device according to the invention,
- Fig. 2
- an enlarged side view of the front end portion of in
Fig. 1 illustrated device, - Fig. 3
- an enlarged side view of the camera receiving longitudinal portion of the in the
Fig. 1 and 2 illustrated device, - Fig. 4
- an enlarged detail view of the connection area of the camera to the rest of the device,
- Fig. 5
- a side view of a second embodiment of a device according to the invention,
- Fig. 6
- a side view of a half-shell of a housing for a pressure jet nozzle of a device according to the invention along the in
Fig. 7 represented line VI-VI, - Fig. 7
- a cross section through the in
Fig. 6 shown housing along the line there VII - VII and - Fig. 8
- a longitudinal section through the end of a device according to the invention with a housing according to the
FIGS. 6 and 7 ,
Die in den
Die
Die in den
Die Druckstrahldüse 5 ist mir ihrem rückwärtigen Ende an einen Druckschlauch 8 angeschlossen, der zu einem nicht dargestellten Kompressor außerhalb des Rohrleitungssystems führt und von dort aus mit einer Arbeitsflüssigkeit druckbeaufschlagt wird. Als Arbeitsflüssigkeit kommt vorzugsweise Wasser zur Anwendung. Ganz allgemein handelt es sich bei der Arbeitsflüssigkeit um ein Fluid, das gegebenenfalls auch mit abrasiven Feststoffen ergänzt sein kann. In etwa parallel zum Druckschlauch 8 führt ein ebenfalls von außerhalb des Rohrleitungssystems kommender zur Druckstrahldüse 5 führender druckstabiler aber flexibler Schubstab 9, der beispielsweise auf einer Haspel abwickelbar zur Verfügung steht. Der Schubstab 9 besteht aus glasfaserverstärktem Kunststoff und dient dazu, Vorschubkräfte auf die Druckstrahldüse 5 aufzubringen, wozu der Schubstab 9 manuell oder motorisch in das Rohrleitungssystem eingeschoben wird. Um ein gemeinsames Einschieben oder Herausziehen von Druckschlauch 8 und Schubstab 9 zu ermöglichen, sind diese in vorbestimmten Längsabständen längskraftschlüssig miteinander verbunden, was am einfachsten durch Umwickeln mit einem Klebeband geschehen kann. Es ist auch möglich Druckschlauch 8 und Schubstab 9 bis in den Sanierungsbereich innerhalb einer gemeinsamen schlauchartigen Umhüllung 10 zu führen, beispielsweise innerhalb eines Schrumpfschlauchs, wodurch eine zusätzlicher Schutz vor Beschädigung oder Verschmutzung erreicht wird.The
Bei dem Ausführungsbeispiel gemäß der
Wie insbesondere
Als weiteres Hilfsmittel, um die Störstelle in der Rohrleitung 1 zunächst auffinden und dann den Sanierungsvorgang online überwachen und kontrollieren zu können, umfasst die dargestellte Ausführungsform der Vorrichtung 4 eine Kamera 16, die über eine angeschlossene Videodatenleitung 17 das aufgenommene Videosignal zur Anzeige an eine nicht dargestellte außerhalb des Rohrleitungssystem befindliche TV-Einheit überträgt. Der Anschluss der Kamera 16 an den Schubstab 9 ist in den
Zur Beseitigung einer Störstelle innerhalb einer Rohrleitung 1, beispielsweise Inkrustationen 2 am Rohrinnenumfang, wird die erfindungsgemäße Vorrichtung 4 mit der Druckstrahldüse 5 voran bei abgeschaltetem Kompressor zunächst so weit in die (teil)verstopfte Rohrleitung 1 eingeschoben, bis die Druckstrahldüse 5 die Störstelle erreicht hat. Im Gegensatz zu den bekannten, sich nach dem Rückstoßprinzip selbsttätig durch das zu reinigende Rohr bewegenden Spülköpfen mit schräg nach rückwärts gerichteten Austrittsöffnungen erzeugt die erfindungsgemäße Vorrichtung 4 nur einen schräg nach vorne, d.h. in Einschubrichtung gerichteten Druckstrahl 7, der im Normalfall in Fließrichtung 3 der Rohrleitung 1 weist. Das Einschieben der Druckstrahldüse 5 geschieht also aktiv mit Hilfe des Schubstabs 9, der aufgrund seiner Biegesteifigkeit ausreichend druckstabil ist, um eine ausreichende Vorschubkraft auf die Druckstrahldüse 5 aufzubringen, gleichzeitig aber genügend flexibel ist, um dem Rohrleitungsverlauf auch in Bereichen von Krümmungen und Abzweigen folgen zu können.To eliminate an impurity within a
Würde man nach Erreichen dieser Anschlagstellung den Kompressor einschalten, d.h. die Druckstrahldüse 5 mit Arbeitsflüssigkeit beaufschlagen, dann würde der Druckstrahl 7 im Falle eines kompletten Verschlusses der Rohrleitung 1 aufgrund des Strahlwinkels nur einen geringen zentralen Bereich des verstopften Querschnitts frei legen. Bei lediglich verengten Rohrleitungsquerschnitten würde der Druckstrahl 7 seine Wirkung erst hinter der Störstelle entfalten und die Störstelle bliebe bestehen.Would you turn on the compressor after reaching this stop position, ie pressurize the
Für eine effektive Bearbeitung der Störstelle wird daher die Druckstrahldüse 5, von der Störstelle um den Abstand A zurückgezogen, bevor die Druckstrahldüse 5 mit Arbeitsflüssigkeit druckbeaufschlagt wird. Durch Einhalten des Abstandes A wird sichergestellt, dass der Druckstrahl 7 bei gegebenem Strahlwinkel α in der Ebene der Störstelle den Innenumfang der Rohrleitung 1 erreicht. Dort bewirkt der Druckstrahl 7 aufgrund seiner kinetischen Energie ein Zerkleinern und Fortspülen der Inkrustationen 2 und damit Beseitigen der Störstelle. Nach Beendigung der Sanierung wird die Vorrichtung 4 mittels des Schubstabs 9 wieder zur Startöffnung herausgezogen.For effective processing of the impurity therefore the
Bei der in den
Um die im Reinigungsbetrieb wirkenden Rückstoßkräfte der Druckstrahldüse 5 besser auffangen zu können, insbesondere bei hohen Drücken von über 300 bar, ist gemäß der in
Die
Wie aus
Eine nicht dargestellte Ausführungsform des Gehäuses sieht einen im Querschnitt kreisförmigen Gehäuseumfang vor, von dem aus sich die Längskufen in radialer Richtung und mit einheitlichem gegenseitigen Umfangsabstand erstrecken. Ebenso sind Gehäuse mit einer glatten Oberfläche, also ohne Kufen, von der Erfindung umfasst.An unillustrated embodiment of the housing provides a circular cross-section housing circumference, from which extend the longitudinal skids in the radial direction and with a uniform mutual circumferential distance. Likewise, housing with a smooth surface, ie without runners, is encompassed by the invention.
Die Kombination des Gehäuses 20 mit einer Vorrichtung gemäß den
Ohne im einzelnen dargestellt zu sein können zwischen der Druckstrahldüse 5 und dem Innenumfang des Abschnitts 27 Abstandsringe eingefügt sein, um auch im Durchmesser kleinere Druckstrahldüsen in das Gehäuse 20 einsetzen zu können.Without being shown in detail, spacer rings may be inserted between the
An das im Gehäuseinneren liegende Ende der Druckstrahldüse 5 schließt eine Druckfeder 32 an, die wiederum den flexibleren Teil der Schubstabs 9 verkörpert. Auf dem der Druckstrahldüse 5 zugeordneten Ende der Druckfeder 32 sitzt ortsfest ein Ring 33, der den konischen Abschnitt 26 formschlüssig ausfüllt und so ein zug- und druckfester Verriegelung der Druckfeder 32 im Gehäuse 20 bewirkt. Die Druckfeder 32 erstreckt sich durch den zylindrischen Abschnitt 25 hindurch und reicht mit ihrem außerhalb des Gehäuses 20 liegenden Ende in eine Aufnahmebohrung eines muffenartigen Kupplungsstücks 34, wo sie fest verankert ist. Von dem gegenüberliegenden Längsende des Kupplungsstücks 34 erstreckt sich ein Durchlass 35, der in seinem weiteren Verlauf in die Aufnahmebohrung übergeht. Auf diese Weise entsteht ein das Kupplungsstück 34 in Längsrichtung durchdringender Kanal, der dazu dient, den Druckschlauch 8 ins Innere der Druckfeder 32 zu leiten, wo der Druckschlauch 8 axial zur Druckstrahldüse 5 geführt ist. Das Kupplungsstück 32 weist ferner eine axiale Sackbohrung 36 auf, in der der aus glasfaserverstärkten Kunststoff bestehende Teil des Schubstabs 9 zug- und druckfest befestigt ist.At the lying in the housing interior end of the
Der Vorteil dieser Ausführungsform der Erfindung liegt neben der geschützten Aufnahme der Druckstrahldüse 5 im Gehäuse 20 in dem axialen Anschluss der Druckfeder 32 und des Druckschlauchs 8 an die Druckstrahldüse 5. Dadurch werden Vorschubkräfte zentrisch in das Gehäuse 20 eingeleitet und die Gefahr des Verkantens der Vorrichtung in der Rohrleitung 1 verringert. Unterstützt wird dieser Effekt durch die Schrägen 19 und 24, mit Hilfe derer Vorsprünge und Absätze in der Rohrleitung 1 überwunden werden.The advantage of this embodiment of the invention is in addition to the protected recording of the
Die vorliegende Erfindung ist nicht auf die Merkmalskombinationen der einzelnen in den Figuren beschriebenen Ausführungsformen beschränkt. Vielmehr liegen im Rahmen der Erfindung auch Kombinationen von Merkmalen unterschiedlicher Ausführungsformen, soweit diese an den Sinn und Zweck der Erfindung anknüpfen. So kann beispielsweise in das Gehäuse 20 eine Aufnahme für eine Kamera integriert sein. Die Aufnahme nach Art einer zylindrischen Vertiefung kann dabei monolithisch aus der Gehäusewand hervorgehen und ermöglicht ein axiales Einschieben der Kamera. Versorgungs- und Datenleitungen für die Kamera werden bei einer solchen Ausführungsform vorteilhafterweise neben dem Druckschlauch innerhalb der Druckfeder geführt.The present invention is not limited to the feature combinations of the individual embodiments described in the figures. Rather, in the context of the invention, combinations of features of different embodiments, as far as they are based on the purpose of the invention. For example, a receptacle for a camera can be integrated in the
Claims (14)
- A method for hydrodynamically eliminating defects in the interior of pipelines (1), in particular for sanifying and cleaning water-carrying pipelines (1) in the domestic and industrial sector, wherein a pressure jet (7) acting on the defect is generated with the aid of a pressure jet nozzle (5) having a central outlet opening (6) supplied with working fluid via a pressure hose (8), while the pressure jet nozzle (5) is moved relative to the pipeline (1), having the following method steps:a) connecting the pressure jet nozzle (5) to a tension and compression resistant push rod (9),b) inserting the pressure jet nozzle (5) into the pipeline (1) with the aid of the push rod (9) up to the defect,c) further pushing or withdrawing the pressure jet nozzle (5) until a predetermined distance to the defect is reached, wherein the pressure jet nozzle (5) points to the defect,d) generating a pressure jet (7) in the form of a rotating spot jet only in the direction of the defect having a jet angle at which the pressure jet generated (7) leaves the front, central outlet opening (6) in relation to the longitudinal axis of the pressure jet nozzle (5), between 15° and 45° in the case of an operating pressure of up to 600 bar and greater,e) generating a movement of the pressure jet nozzle (5) in the direction of the defect.
- The method according to claim 1, characterised in that in order to achieve the predetermined distance (A) to the defect the pressure jet nozzle (5) is moved away from the defect so far that the pressure jet (7) leaving the pressure jet nozzle (5) covers the entire inner circumference of the pipeline (1) in the region of the defect.
- The method according to claim 1 or 2, characterised in that the pressure jet (7) leaving the pressure jet nozzle (5) is directed in the flow direction of the pipeline (1).
- The method according to any one of claims 1 to 3, characterised in that the pressure jet nozzle (5) is inserted into the pipeline (1) in or against the flow direction (3) of the pipeline (1).
- A device for hydrodynamically eliminating defects in the interior of pipelines (1), in particular for sanifying and cleaning water-carrying pipelines (1) in the domestic and industrial sector, having a pressure jet nozzle (5) with a central outlet opening (6), movable relative to the pipeline (1), for generating a rotating spot jet having a jet angle at which the pressure jet generated (7) leaves the front, central outlet opening (6) in relation to the longitudinal axis of the pressure jet nozzle (5), between 15° and 45°, a pressure hose (8) being connected to said pressure jet nozzle to supply a pressurised working fluid, wherein the device has a tensile and compression resistance push rod (9), at the one end of which the pressure jet nozzle (5) is arranged and is insertable into the pipeline (1), wherein the device has a housing (20) in which the pressure jet nozzle (5) is accommodated substantially free of play.
- The device according to claim 5, characterised in that the push rod (9) is connected to the pressure jet nozzle (5) on the longitudinal axis of the pressure jet nozzle (5).
- The device according to claim 5, characterised in that the push rod (9) is divided in two at the end thereof associated with the pressure jet nozzle (5) and the two parts are respectively fixed laterally to the pressure jet nozzle (5).
- The device according to any one of claims 5 to 7, characterised in that the push rod (9) is rigidly connected to the pressure jet nozzle (5).
- The device according to any one of claims 5 to 7, characterised in that in order to elastically connect the push rod (9) to the pressure jet nozzle (5) the end section of the push rod (9) associated with the pressure jet nozzle (5) has a lower flexural strength than the rest of the push rod (9), in particular in that the end section is formed by a compression spring (11, 32).
- The device according to claim 9, characterised in that the end section is formed in a tubular manner and the pressure hose (8) is guided inside the end section.
- The device according to any one of claims 5 to 10, characterised in that a pipe bend, preferably a 180° pipe bend is inserted between the push rod (9) and the pressure jet nozzle (5).
- The device according to any one of claims 5 to 11, characterised in that in order to adapt the housing (20) to different pressure jet nozzles (5) adapter elements, for example radially operating spacer rings are arranged between the housing interior and the pressure jet nozzle (5).
- The device according to any one of claims 5 to 11, characterised in that the pressure jet nozzle (5) or the housing (20) is surrounded by a centring element which has a support surface for contacting the inner wall of the pipeline (1) such that the pressure jet nozzle (5) is positionable at a radial distance to the pipeline (1).
- The device according to any one of claims 5 to 13, characterised in that at least the push rod (9) and the pressure hose (8) are guided inside a common casing (10), preferably also further supply lines (17).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910007946 DE102009007946A1 (en) | 2009-02-06 | 2009-02-06 | Method and device for pipe cleaning |
| PCT/EP2010/000768 WO2010089146A2 (en) | 2009-02-06 | 2010-02-08 | Method and device for hydrodynamically eliminating defects in the interior of pipelines,in particular for reclaiming and cleaning water-bearing pipelines in household and industrial areas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2393615A2 EP2393615A2 (en) | 2011-12-14 |
| EP2393615B1 true EP2393615B1 (en) | 2016-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10707207.6A Active EP2393615B1 (en) | 2009-02-06 | 2010-02-08 | Method and device for hydrodynamically eliminating defects in the interior of pipelines |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2393615B1 (en) |
| DE (2) | DE102009007946A1 (en) |
| WO (1) | WO2010089146A2 (en) |
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| DE102011053172B4 (en) * | 2011-08-31 | 2017-05-24 | Mitsubishi Hitachi Power Systems Europe Gmbh | Flushing device for cleaning a branched from a manifold pipe of a pipe system |
| FR3008909A1 (en) * | 2013-07-23 | 2015-01-30 | Areva Nc | DEVICE FOR CLEANING A PIPE COMPRISING TRACTION MEANS OF A CLEANING HEAD |
| DE202014105354U1 (en) | 2014-11-07 | 2014-11-19 | Hydrotec Germany Gmbh | Device for cleaning pipes |
| EP3017885B1 (en) | 2014-11-07 | 2020-04-08 | IMS Robotics GmbH | Device for cleaning tubes |
| DE202017104354U1 (en) * | 2017-07-20 | 2018-08-08 | Jürgen Herm | Device for the hydrodynamic removal of imperfections in the interior of pipelines, in particular for the rehabilitation and cleaning of water-bearing pipelines in domestic, municipal and industrial areas |
| DE102018129147B4 (en) | 2018-11-20 | 2022-01-20 | Maik Huck | Process and device for paint coating pipelines |
| CN116163403B (en) * | 2023-03-14 | 2025-10-21 | 中国市政工程东北设计研究总院有限公司 | Method for removing pipeline sludge and microorganisms and pipeline cleaning system |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1338917A (en) * | 1919-11-18 | 1920-05-04 | Hall Edward | Conduit-cleaner |
| GB638211A (en) * | 1947-08-25 | 1950-06-07 | Robert Walton | An improved device for spraying continuous internal surfaces |
| DE1165945B (en) | 1960-02-01 | 1964-03-19 | Hammelmann Paul Fa | Nozzle head with hose connection for pipe cleaning |
| DK488376A (en) * | 1976-10-28 | 1978-04-29 | Iss Servisystem As | PROCEDURE AND DEVICE FOR REMOVING FIXED COATINGS ON THE INSIDE OF PIPES |
| US4420852A (en) * | 1981-05-08 | 1983-12-20 | David Bowlsby | Drain cleaning machines |
| US5253664A (en) * | 1992-07-14 | 1993-10-19 | Jet Blast Products Corporation | Drain blaster |
| DE4328744C1 (en) | 1993-08-26 | 1994-12-22 | Spraying Systems Deutschland G | Nozzle |
| US5584093A (en) * | 1994-10-21 | 1996-12-17 | Clean-Aire International, Inc. | Duct cleaning apparatus |
| US5735016A (en) * | 1994-10-21 | 1998-04-07 | Clean-Aire International, Inc. | Duct cleaning apparatus |
| US5626684A (en) * | 1995-01-26 | 1997-05-06 | Rodarte; Frank | Method and apparatus for sewage surcharge dissipation |
| DE29513288U1 (en) | 1995-08-18 | 1995-10-12 | Preussag Rohrsanierung GmbH, 13587 Berlin | Cleaning facility |
| US5988188A (en) * | 1996-12-31 | 1999-11-23 | Jir, Inc. | Method and apparatus to remove obstructions from sewers without cutters or chemicals |
| DE19703317A1 (en) | 1997-01-30 | 1998-08-06 | Lufthansa Technik Ag | Method and device for cleaning pipelines |
| DE29904362U1 (en) | 1999-03-10 | 1999-05-12 | Ehle, Friedhelm, 04827 Gerichshain | Cleaning device for pipes or tubular channels |
| DE10323298B4 (en) * | 2003-05-21 | 2007-03-08 | Herbert Grunwald | Process for the rehabilitation of incrusted water pipelines |
-
2009
- 2009-02-06 DE DE200910007946 patent/DE102009007946A1/en not_active Withdrawn
-
2010
- 2010-02-08 EP EP10707207.6A patent/EP2393615B1/en active Active
- 2010-02-08 DE DE202010018297.2U patent/DE202010018297U1/en not_active Expired - Lifetime
- 2010-02-08 WO PCT/EP2010/000768 patent/WO2010089146A2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP2393615A2 (en) | 2011-12-14 |
| DE102009007946A1 (en) | 2011-03-17 |
| DE202010018297U1 (en) | 2015-08-07 |
| WO2010089146A3 (en) | 2011-10-27 |
| WO2010089146A2 (en) | 2010-08-12 |
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