EP4537947A1 - A combined spray and suction nozzle for a water provision device, a method of cleaning a well and a computer program product - Google Patents

Abstract

A combined spray and suction nozzle (10) for a water supply device (50), wherein the water supply device provides a suction flow and a liquid flow comprising a liquid for the nozzle. The nozzle (10) has a discharge region (12) for discharging the liquid and a suction region (14) for sucking away suction material with the suction flow. In a second aspect, a method for cleaning a borehole (B) with a water supply device (50) and such a nozzle (10), the method comprising, among other things, the discharge of a liquid and the sucking away of suction material through the nozzle. In a third aspect, a computer program product (CPP) for operation on a water supply device (50), wherein the proposed method is controllable by the computer program product.

Description

The present invention relates to a combined spray and suction nozzle for a water supply device, wherein the water supply device provides a suction stream and a liquid stream comprising a liquid for the nozzle. The nozzle has a discharge region for discharging the liquid and a suction region for sucking away suction material with the suction stream. In a second aspect, the invention relates to a method for cleaning a borehole using a water supply device and such a nozzle, wherein the method comprises, among other things, the discharge of a liquid and the sucking away of suction material through the nozzle. In a third aspect, the invention relates to a computer program product for operation on a water supply device, wherein the proposed method is controllable by the computer program product.

Background of the invention:

Core drilling machines are known in the art, with which essentially cylindrical cores can be cut out of a substrate, such as concrete or masonry. Such a core drilling leaves a borehole that must be frequently cleaned for further use. Boreholes can also be created using drills or hammer drills, which use a drill or hammer drill to create holes in a substrate. It is often planned to insert threaded rods or dowels into the created borehole in order to attach larger objects, such as lamps or fastening systems, to walls or ceilings. To ensure the secure and stable attachment of the threaded rods or dowels, thorough cleaning of the borehole is necessary, as residual dust or particles that have undesirably remained in the borehole can significantly reduce the load-bearing capacity of the borehole.

Various methods for cleaning boreholes are known in the state of the art. For example, brushes are known with which the boreholes can be brushed out after core drilling. However, brushing the boreholes can Significant amounts of dust can enter the environment and subsequently enter the respiratory tracts of workers on a construction site. Blow-out or extraction solutions are also known, for example, using hollow-hole drills to extract drilling debris from the borehole. However, hollow-hole drills have a thread that can force some of the dust or drilling debris against the inner walls of the borehole, where it is often difficult to remove.

The object underlying the present invention is to overcome the above-described deficiencies and disadvantages of the prior art and to provide a device and method for improved borehole cleaning. In particular, borehole cleaning is to be standardized to enable the most uniform and consistent cleaning of boreholes possible, especially when a large number of similar boreholes are to be cleaned.

The problem is solved by the subject matter of the independent claims. Advantageous embodiments of the subject matter of the independent claims can be found in the dependent claims.

Description of the invention:

According to the invention, a combined spray and suction nozzle is provided for a water supply device, wherein the water supply device provides a suction flow and a liquid flow comprising a liquid for the nozzle. The nozzle has a discharge region for discharging the liquid and a suction region for sucking away suction material with the suction flow. Within the meaning of the invention, it is preferred that the water supply device is designed to provide a suction flow and a liquid flow for the nozzle, wherein the liquid flow comprises a liquid. With the discharge region, the nozzle can discharge liquid or the liquid flow, while the nozzle can suck away suction material from a borehole with the suction region. For this purpose, the nozzle can be subjected to a negative pressure which generates a suction flow. In other words, the water supply device is designed to generate a negative pressure for generating a suction flow or for sucking away suction material.

The nozzle may, for example, comprise first openings for providing liquid or a liquid stream, as well as second openings through which the suction material can be sucked out of the borehole. For this purpose, the nozzle may have an air channel that is in fluid communication with second openings. The air channel and the second openings may be a negative pressure, which can be provided, for example, by the water supply device. In other words, the water supply device is designed to provide a negative pressure. With the help of the negative pressure, a suction flow can be generated in the air channel of the nozzle, with which the suction material can be sucked out of the borehole through the second openings of the nozzle. The air channel can, for example, be arranged inside the nozzle. A possible embodiment of the invention with an internal air channel is, for example, in Figure 2 Of course, the air channel can also be arranged in an outer area of the nozzle and enclose an inner liquid channel. Such a possible embodiment of the invention is shown, for example, in Figure 1 shown.

The fluid or fluid stream can be forced into the borehole through the first openings of the nozzle under pressure. This pressure, as well as the fluid itself, can also be provided by the water supply device.

According to the invention, it is preferred that the suction of the suctioned material can take place continuously. However, it can equally well be preferred that the suction take place at short intervals or with pressure pulses. The specific design of the suction process can be controlled by the computer program product. Preferably, the suction and the discharge of liquid can take place simultaneously or alternately. Tests have shown that the invention can enable particularly good spraying of the borehole, whereby undercuts in the borehole walls can be exposed or freed of drilling dust residue. By cleaning these undercuts, dowels or dowel systems, for example, can be fastened in the boreholes with a homogeneous holding force. In other words, the invention can reduce holding force fluctuations when using a group of dowels, thereby enabling higher loads to be applied.

The proposed nozzle is preferably designed to be inserted into a borehole, which is created, for example, during a (core) drilling operation. The nozzle can be connected to a water supply device and provide a suction flow and a liquid flow. The liquid flow, which in the context of the invention is discharged via the discharge area of the nozzle, can be used to flush the borehole. The resulting mixture of liquid and drilling cuttings (= «suction cuttings») can be sucked out of the borehole with the suction flow and further processed by the water supply device. For example, the suction cuttings can be cleaned by the water supply device in the sense that the Drilling cuttings are separated from the fluid and reused to clean the borehole. The discharge of fluid and the suction of the suctioned material can preferably take place sequentially. However, within the meaning of the invention, it is particularly preferred that the discharge of fluid and the suction of the suctioned material take place simultaneously or essentially simultaneously.

According to the invention, it is preferred that the water supply device be used in conjunction with a core drilling machine. Core drilling machines can be connected to a core bit as a tool, wherein the core drilling machine is configured to cut essentially cylindrical cores from a subsoil to be processed. Larger boreholes, for example, having a diameter of approximately 50 mm and more, can be used, for example, to accommodate cable ducts and pipelines. Smaller boreholes with a diameter of 10 to 50 mm can be used, for example, to accommodate dowels or threaded rods. Of course, the proposed nozzle can also be used in conjunction with a drilling machine or a hammer drill. The boreholes can be created, for example, with a percussion drill. Concrete drills of all kinds, twist drills, or hollow hole drills can be used as tools, but are not limited to these. Threaded rods can then be inserted into the boreholes, whereby the threaded rods can be secured with a chemical or mechanical fastening. For example, expansion anchors, self-tapping anchors, and/or screw anchors, such as the Hilti Universal Screw "HUSS," can be inserted into the drilled hole to secure additional objects in the area of the drilled hole. Drill holes can be drilled downwards into a substrate, laterally into a wall, or overhead into a ceiling.

The substrate can be, for example, concrete, masonry, or the like, whereby the core drilling rig can be used to drill downwards, i.e., vertically, into the ground, or forwards, i.e., horizontally, into a vertical wall. Overhead applications can also be upgraded with such a system without significant water loss and with the best possible cleanliness. Water is often used as a flushing and cooling agent in the operation of (core) drilling rigs. The water can be provided, for example, via a water management system (WMS) and can cool the drill bit, which can become hot due to friction during core drilling. The water management system (WMS) is preferably referred to as a "water supply device" within the meaning of the present invention. The proposed combined spray and suction nozzle can also preferably be referred to as a "WMS nozzle" within the meaning of the invention. Such water supply devices are used in particular for the supply and treatment of liquids on a construction site and are preferably designed to collect, clean and then release in a purified form liquids accumulating on construction sites. Preferably, such a device can be used to keep a liquid circuit on a construction site in operation and to ensure that flushing or cooling water is always available - for example, for core drilling work. Such devices for the supply and treatment of liquids enable core drilling work in particular to be carried out on construction sites where water is not freely available and which may not be easily supplied with water pipes.

In the context of the present invention, liquids are referred to in particular as mixtures comprising used flushing or cooling water, as well as drilling cuttings and/or dust. The liquids thus composed can preferably also be referred to as "drilling fluid," "suction material," or "drilling mud" within the meaning of the invention. In addition to macroscopic drilling cuttings and dust particles, the drilling fluid can also contain traces of various chemicals, such as cleaning or cooling agents, which can improve the function of the flushing or cooling fluid. Furthermore, additives can be used that increase frost protection and/or bonding to the substrate. Furthermore, additives that can reduce the curing time can also be provided.

Preferably, the supplied water can be used to flush the borehole, which may be created, for example, during core drilling. This means that dust or particles that could hinder the continuation of the drilling process are flushed out of the borehole by the cooling water. This allows the borehole to be cleaned so that it is subsequently available in a flushed state for further use. For the purposes of the invention, it is preferred that dust or particles that may arise during the drilling process and often remain in the borehole even after the drilling process has been completed be referred to as "drilling cuttings." This drilling cuttings can be converted into a mixture of drilling cuttings and liquid by the liquid that is discharged into the borehole via the discharge area of the nozzle. For the purposes of the invention, this mixture of drilling cuttings and liquid is preferably referred to as "suction material," whereby the drilling cuttings can be suctioned out of the borehole via the suction area of the nozzle. This makes it possible to provide a very effective cleaning routine for a borehole after completion of a drilling operation, which, as tests have shown, enables reliably good, reproducible cleaning qualities, especially when several boreholes are to be cleaned one after the other.

A key advantage of the invention is that the boreholes can be not only cleaned but also dried by sucking away the suction material with the suction stream. This overcomes a key disadvantage of the prior art, where the cleaning quality often depends on a manual step or on the current air humidity. If the proposed invention not only cleans the borehole to be cleaned but also dries it to a predetermined extent, the borehole can be particularly well prepared for the insertion of a mechanical anchor, a threaded rod, and/or a chemical anchor. It has been shown that boreholes that are sprayed and dried using the proposed nozzle or the proposed cleaning routine exhibit particularly good adhesion values and, above all, only a small standard deviation in the variables that characterize the cleaning quality of a borehole.

According to the invention, it is preferred that the proposed combined spray and suction nozzle can be inserted into a borehole after the drill core has been cut out of the subsoil. A cleaning routine can then be carried out with the water supply device, which includes flushing and cleaning the borehole, as well as drying it. The cleaning routine of the water supply device can preferably be stored in the water supply device as part of a control program or as part of a computer program product. The cleaning routine comprises, in particular, the steps of dispensing liquid into the borehole and suctioning suction material out of the borehole, wherein the liquid is dispensed from the dispensing region of the nozzle and the suction material is suctioned through the suction region of the nozzle. The suction of suction material takes place, in particular, with the aid of the suction flow provided by the water supply device. In order to carry out the cleaning routine, the proposed combined spray and suction nozzle has a dispensing region for dispensing the liquid and a suction region for suctioning suction material with the suction flow. With this nozzle and the present invention, a preferably automated cleaning routine for a borehole can advantageously be carried out, wherein the borehole is preferably the result of core drilling with a core drilling rig. If a drilling machine or a hammer drill is used as the drilling rig, it is preferred within the meaning of the invention that the proposed nozzle can be inserted into the borehole after the drilling operation of the rig has been completed.

Drilling holes with a drilling rig is often not done as a single hole. Rather, it is preferred that a large number of core holes, for example, are drilled consecutively and in close proximity to one another. For example, ten holes to accommodate threaded rods drilled next to each other into a concrete ceiling in order to attach a large, heavy object, such as a lamp or a work of art, to the ceiling. In order to achieve a good load-bearing capacity of the group of ten drill holes, it is important that the drill holes have a uniform load-bearing capacity or make an essentially similar contribution to the overall load-bearing capacity of the group of drill holes. This cannot always be guaranteed, or cannot be sufficiently guaranteed, when cleaning the drill holes manually or by the user. In fact, with manual cleaning, which may depend on the experience and skills of the person carrying out the work, there is a risk that a high degree of variation in the quality of the cleaning and, accordingly, a high degree of variation in the load-bearing capacities of the individual drill holes will be observed. Since the overall load-bearing capacity of the group of boreholes depends significantly on the individual load-bearing capacity of the "weakest link in the chain," i.e., the individual load-bearing capacity of the worst-cleaned borehole, a significant advantage of the present invention is that it enables particularly uniform and consistently good cleaning of all boreholes in a group of boreholes. The improved cleaning of the boreholes can be achieved, in particular, by combining fluid delivery and cuttings suction through the proposed nozzle or with the cleaning routine.

It has been shown that the invention, with the proposed nozzle and the proposed cleaning routine, achieves good cleaning and drying results even when the boreholes are not perfectly round or circular, but rather asymmetrical, chipped, or otherwise "un-round." This result was completely surprising, but all the more important because those skilled in the art know that perfectly round or symmetrical boreholes are the exception rather than the rule. A further advantage of the invention is that it reduces the dust load or exposure of the worker performing the drilling. Conventional methods for cleaning boreholes often involve the use of brushes or compressed air, or the dust is simply blown dry out of the borehole. This can cause the dust to undesirably enter the worker's respiratory tract. By using the liquid stream, which mixes with the drilling debris during the cleaning routine and can be sucked away as suction by the proposed nozzle, the dust is advantageously bound before it can enter the worker's respiratory tract. Furthermore, the setup effort on the construction site can be advantageously reduced. Instead of the numerous tools previously required for borehole cleaning (brushes, compressed air attachments, etc.), only the proposed WMS nozzle is now required. Furthermore, borehole cleaning is made easier for the user. simplified by allowing borehole cleaning to be carried out, preferably automatically, by the water supply device in combination with the proposed nozzle. This advantageously eliminates a multi-step, complex borehole cleaning process and replaces it with a preferably automated cleaning routine.

In the context of the present invention, a borehole cleaning system is preferably also disclosed, with which this preferably automated routine for cleaning a borehole can be carried out. The borehole cleaning system comprises a proposed nozzle and a water supply device, wherein the water supply device provides a suction stream comprising air and a liquid stream comprising a liquid to the nozzle. The nozzle has a discharge region for discharging the liquid and a suction region for sucking away suction material with the suction stream. The nozzle can be inserted into a borehole and there discharge a liquid into the borehole to flush the borehole. The liquid is preferably discharged through first openings of the nozzle, wherein the liquid is discharged in particular in the form of a liquid stream. The first openings of the nozzle are preferably arranged in the discharge region of the nozzle. The liquid stream is provided by the water supply device. In addition to the discharge region, the nozzle has a suction or suction region with second openings through which the mixture of liquid and drilling material can be sucked out of the borehole. For this purpose, the second openings or the suction area of the nozzle can be subjected to a negative pressure provided by the water supply device. This negative pressure creates a suction flow with which the suction material, which preferably corresponds to a mixture of fluid and drilling debris, can be sucked out of the borehole. The drilling rig itself is preferably not part of the borehole cleaning system.

According to the invention, it is preferred that the discharge region forms an upper region of the nozzle and the suction region forms a lower region of the nozzle. This arrangement of the different functional regions of the proposed nozzle enables particularly good flushing of the borehole and effective suction of the suctioned material. This is because the mixture of liquid and dust or drilling cuttings that forms in the borehole after the liquid is introduced preferably collects in a lower region of the borehole. By providing the suction region in a lower region of the proposed nozzle, the suction of the suctioned material can take place in the lower region of the borehole, so that the suctioned material can advantageously be removed or suctioned away essentially completely from the borehole.

According to the invention, it is preferred that the discharge region has a plurality of first openings for discharging the liquid and the suction region has a plurality of second openings for sucking away the suctioned material. The first openings can preferably be referred to as injection or pressure openings. The first openings are preferably designed to introduce the liquid into the borehole, wherein the liquid can preferably be injected into the borehole at high pressure. The liquid can, for example, be introduced into the borehole at a pressure of up to 1 bar to 300 bar. A pressure between 5 and 20 bar, for example 6 bar, is particularly preferred. Of course, all whole or rational numerical values between 1 bar and 300 bar are preferred as pressure.

The second openings can preferably be referred to as suction openings. The second openings can be subjected to a negative pressure, which can be provided by the water supply device. According to the invention, the negative pressure with which the suction material is suctioned through the second openings is in a range between 50 and 1,000 millibars (mbar). This corresponds to negative pressure values of approximately 0.05 to approximately 1 bar. According to the invention, it is particularly preferred that the negative pressure with which the suction material is suctioned through the second openings is in a range of or at 250 mbar. The inventors have recognized that the higher the negative pressure, the faster the borehole can be dried.

In the context of the present invention, the vacuum values are specified in millibars and as positive numerical values. However, those skilled in the art know that a vacuum has a negative sign. Thus, the phrase "a higher vacuum" within the meaning of the invention preferably means that the associated vacuum value is a greater distance from the pressure = 0 bar than a "lower" vacuum. Consequently, a "higher" vacuum has a greater magnitude than a "lower" vacuum.

It is preferred within the meaning of the invention that the first and/or second openings follow a specific pattern and are arranged on the nozzle according to this pattern. It has been shown that a particularly large number of openings can be accommodated on the nozzle by a structured and uniform arrangement of the openings. However, it may also be preferred within the meaning of the invention that the arrangement of the openings on the nozzle does not follow a uniform pattern or structure. In this case, there is a high degree of freedom in the design and manufacture of the nozzle.

The nozzle can have different sizes and/or different diameters. For example, the sizes and/or diameters of different nozzles can be adapted to the sizes and diameters of the boreholes or the boreholes created there. For example, a nozzle for a borehole with a diameter of 20 mm can have a diameter that correlates with the borehole diameter of 20 mm. Preferably, a nozzle used in a borehole with a borehole diameter of 40 mm can have a diameter approximately twice as large as the nozzle used in the borehole with a borehole diameter of 40 mm.

According to the invention, it is preferred that the discharge area be movable to enable good angular coverage when flushing a borehole. The discharge area can preferably be referred to as a "spray unit," whereby the spray unit can be movable to enable the largest possible angular coverage in the borehole. According to the invention, this preferably means that the movable design of the spray unit or discharge area allows the nozzle to reach and/or flush the largest possible angular range of the borehole.

Alternatively or additionally, the suction area of the nozzle can also be designed to be movable in order to enable good angular coverage when extracting suction material from a borehole. The suction area can preferably be referred to as a "suction unit," whereby the suction unit can be designed to be movable in order to achieve the largest possible angular coverage when extracting suction material from the borehole. In the context of the invention, this preferably means that the movable design of the suction area or suction unit allows the nozzle to particularly effectively extract and subsequently dry the largest possible angular area of the borehole.

It is preferred within the meaning of the invention that a movement of the discharge area and/or the suction area of the nozzle is formed by a rotation, an oscillation, and/or a rotation of the nozzle and/or its components. Preferably, in the context of the invention, the nozzle, the spray unit, and/or the suction unit can rotate, oscillate, and/or rotate in the borehole. The proposed nozzle preferably has a rotating or at least partially rotating combined spray and suction head, whereby the nozzle can be inserted into a borehole created, for example, by a core drilling process. The proposed nozzle can have different opening angles and/or geometries at its tip or at its lowest area in order to achieve an optimal cleaning effect. The nozzle can preferably also be referred to as a "spray nozzle." The nozzle is preferably configured to rotate, oscillate, and/or rotate within the borehole to achieve a 360° cleaning and spraying action or a substantially 360° cleaning and spraying action. The suction region of the nozzle is preferably configured to convey or transport the drilling cuttings detached from the borehole, primarily from the side walls of the borehole.

According to the invention, it is preferred that the water supply device can be connected to a suction hose. The suction hose of the water supply device is preferably designed to connect the proposed combined spray and suction nozzle to the water supply device. The suction hose can, for example, comprise hose-in-hose technology, wherein a pressure or air hose can be provided inside the suction hose. The pressure or air hose can, for example, have a diameter of approximately 10 mm, whereas the suction hose has a diameter between 30 and 60 mm, preferably more than 35 mm and particularly preferably in a range of 45 to 55 mm. According to the invention, it is preferred that the suction hose unit can be connected to the nozzle unit using a bayonet lock.

1. a) Einführen der Düse in ein Bohrloch,
2. b) Bereitstellung eines Saugstroms und eines Flüssigkeitsstroms, der eine Flüssigkeit umfasst, durch die Wasserbereitstellungsvorrichtung,
3. c) Abgabe der Flüssigkeit durch einen Abgabebereich der Düse,
4. d) Absaugen von Sauggut mit dem Saugstrom durch den Saugbereich der Düse.

In a second aspect, the invention relates to a method for cleaning a borehole with a water supply device and a proposed spray and suction nozzle, the method being characterized by the following method steps:

1. a) Inserting the nozzle into a borehole,
2. b) providing a suction flow and a liquid flow comprising a liquid by the water supply device,
3. c) Dispensing the liquid through a dispensing area of the nozzle,
4. d) Suction of suction material with the suction flow through the suction area of the nozzle.

The terms, definitions, and technical advantages introduced for the nozzle preferably apply analogously to the cleaning method. The proposed method can be used to carry out a preferably automated routine for cleaning a borehole, wherein the borehole may, for example, be the result of a drilling operation or a core drilling operation. The proposed cleaning method can be implemented in a water supply device, for example in the form of a computer program product. This enables the water supply device to carry out the proposed borehole cleaning method essentially automatically or automatically. The task of the user of the water supply device and nozzle system is preferably to insert the combined spray and suction nozzle into the borehole to be cleaned and to ensure that the nozzle remains in the borehole during the procedure.

The fluid for cleaning the borehole is preferably discharged through first openings in the nozzle, with the fluid being discharged in particular in the form of a fluid stream. The first openings of the nozzle are preferably arranged in the discharge region of the nozzle. The fluid stream is provided by the water supply device, wherein the fluid stream may in particular comprise water as a flushing agent. In addition, the fluid or fluid stream may comprise chemical additives, such as cleaning or antifreeze agents, or the like, to further enhance the flushing, cleaning, or antifreeze effect. The additives may also influence the condition of the borehole walls, thereby improving the adhesion of a dowel. In this case, the chemical additive may be referred to as a "primer." In addition to the discharge region, the spray and suction nozzle has a suction region with second openings through which the mixture of fluid and drilling cuttings can be suctioned out of the borehole. For this purpose, the second openings or the suction region of the nozzle can be subjected to a negative pressure provided by the water supply device. The negative pressure creates a suction flow with which the suction material, which preferably corresponds to the mixture of liquid and drilling material, can be sucked out of the borehole.

According to the invention, it is preferred that the borehole is also dried by the suction of the suctioned material. Advantageously, the wall of the borehole can be dried after the suction of the suctioned material. The drying of the interior of the borehole occurs particularly when the suctioned material has been completely or essentially completely suctioned out of the borehole. The negative pressure applied to the second openings of the suction area then preferably generates an air flow with which the borehole or its inner walls can be dried.

It is preferred according to the invention that the spray and suction nozzle, the discharge area and/or the suction area are designed to be movable in order to enable good angular coverage during cleaning and/or drying of the borehole. Preferably, a movement of the nozzle, the discharge area and/or the suction area can be formed by rotation, oscillation and/or circulation. It is preferred according to the invention that the suction flow is provided by supplying the suction area of the nozzle with a negative pressure. Preferably, the suction flow can be provided by applying a negative pressure to the second openings of the nozzle. According to the invention, it is preferred that the suction flow be generated or provided by the water supply device.

In a further aspect, the invention relates to a computer program product for operating the water supply device, wherein the proposed method for cleaning a borehole can be controlled by the computer program product. The terms, definitions, and technical advantages introduced for the spray and suction nozzle and the borehole cleaning method preferably apply analogously to the computer program product. The fact that the borehole cleaning method is controllable by the computer program product preferably means, within the meaning of the invention, that the cleaning method can be carried out with the aid of the computer program product. In particular, the computer program product enables the controlled and automated execution of the proposed cleaning and drying method, particularly when several similar boreholes are to be cleaned or dried one after the other and in close proximity to one another. In this way, the computer program product can support the execution of the borehole cleaning method and ensure a uniform process. Controlling the proposed method by the computer program product advantageously enables a particularly uniform and consistent execution of the method, so that the boreholes can be cleaned or dried particularly evenly and effectively. This makes it possible, for example, to achieve particularly uniform cleaning and drying of the boreholes in a group of boreholes, whereby this uniform cleaning and drying can advantageously lead to particularly high cleaning quality and good adhesion of the individual boreholes and thus to a particularly high overall load-bearing capacity of the group of boreholes.

The computer program product can in particular be configured to control the method for cleaning a borehole using a water supply device and a proposed nozzle. In the sense of the invention, this preferably means that the cleaning of a borehole using a water supply device and a proposed nozzle is the subject of the proposed computer program product. In this case, the computer program product can in particular be operated on the water supply device. Preferably, the computer program product can be stored on the water supply device. For this purpose, the water supply device can comprise corresponding storage means. The computer program product can cause the Method steps of the cleaning method are carried out in a specific order and in compliance with specified parameters. For example, in the context of the proposed computer program product, a specific pressure for dispensing the liquid can be specified. Alternatively or additionally, it may be preferred that a specific negative pressure for suctioning off the suctioned material is specified or set in the context of the proposed computer program product. In addition, for example, a specific time for drying the borehole can be specified. If the nozzle, the dispensing area and/or the suction area are movable, the proposed computer program product can, for example, include information on how to carry out the movement, for example angle information, speeds and/or start and end points of the movement, without being limited thereto. The proposed computer program product can, for example, be downloaded from the Internet or a cloud to a PC and then transferred to the water supply device and stored there. Changes to the computer program product can be made in a similar manner. Alternatively or additionally, the water supply device may be capable of communicating with the Internet or a cloud to download the computer program product directly to the water supply device and store it there. The computer program product may preferably also include different variants, for example, provided for different sizes of proposed nozzles or boreholes.

Further advantages emerge from the following description of the figures. The figures, the description, and the claims contain numerous features in combination. The skilled person will expediently consider the features individually and combine them into further meaningful combinations.

In the figures, identical and similar components are numbered with the same reference numerals.

Fig. 1

Ansicht einer bevorzugten Ausgestaltung eines Systems zur Bohrlochreinigung, das eine Wasserbereitstellungsvorrichtung und eine Sprüh- und Absaug-Düse umfasst.

Fig. 2

Ansicht einer alternativen Ausgestaltung eines Systems zur Bohrlochreinigung, das eine Wasserbereitstellungsvorrichtung und eine Sprüh- und Absaug-Düse umfasst.

It shows:

Fig. 1

View of a preferred embodiment of a borehole cleaning system comprising a water supply device and a spray and suction nozzle.

Fig. 2

View of an alternative embodiment of a borehole cleaning system comprising a water supply device and a spray and suction nozzle.

Examples of implementation and description of figures:

Figure 1 shows a preferred embodiment of a spray and suction nozzle 10 that can be used in a system 100 (not shown) for borehole cleaning. In addition to the nozzle 10, such a system 100 can comprise a water supply device 50 (not shown). The water supply device 50 can be connected to the nozzle 10 via a suction hose 52 (not shown). The nozzle 10 can be introduced into a borehole B that was created, for example, by core drilling. Core drilling devices are known in the prior art for this purpose, but are not shown here. In addition, boreholes B can be created in a conventional manner using drilling devices such as drilling machines or hammer drills. The boreholes B created are essentially cylindrical, although those skilled in the art will know that boreholes B are often not perfectly round or symmetrical. This can be due, for example, to inhomogeneities in the subsoil U from which a core is cut.

The nozzle 10 can have an upper region 22 and a lower region 24, with a discharge region 12 arranged in the upper region 22 and a suction region 14 in the lower region 24. The discharge region 12 can have first openings 16 through which a liquid can be discharged into the borehole B. The borehole B can be flushed with liquid to loosen drilling dust and dust particles. This creates a mixture of liquid and drilling debris, which is preferably referred to as "suction debris" within the meaning of the invention. This suction debris can be suctioned away through second openings 18 of the nozzle 10. The second openings 18 are preferably arranged in a suction region 14 of the nozzle 10, i.e., in its lower region 24. The lowermost part 20 of the nozzle can preferably be formed by a tip. The tip 20 of the nozzle 10 can have different opening angles. It is preferred in the sense of the invention that the nozzle 10 can have different diameters D, wherein the diameters preferably correlate with the diameters of the boreholes B. In other words, the diameter D of the nozzle can be selected depending on the diameter of a borehole B.

Through the first openings 16 of the discharge area 12 of the nozzle 10, a liquid—preferably water—can be injected into the borehole B to be cleaned. The discharge area 12 of the nozzle 10 can, in particular, form a spray unit with which the liquid of the water supply device 50 is introduced—preferably under pressure—into the borehole B. The pressure with which the liquid is introduced into the borehole B can, for example, be in a range of up to 6 bar.

The liquid is provided in the form of a liquid stream from the water supply device 50 and transferred to the nozzle 10 through the suction hose 52.

In borehole B, the fluid mixes with the drilling material remaining there, such as drilling dust or particles. This mixture is referred to as "suction material" within the meaning of the invention, whereby the suction material can be sucked away via the second openings 18 of the nozzle 10. It is particularly preferred within the meaning of the invention that the second openings 18 of the nozzle 10 can be subjected to a negative pressure, whereby the negative pressure is provided by the water supply device 50 and transmitted to the nozzle 10 via the suction hose 52. For example, the water supply device 50 can have a motor (not shown) that drives a turbine (not shown) to generate a negative pressure and thereby an air flow for sucking away the suction material.

By suction, the suction material is transported away from the borehole B and thus removed. The borehole B can thus be cleaned and well prepared for further use. The suction of the suction material takes place in particular via the suction area 14 of the nozzle 10, which preferably forms a suction unit of the nozzle 10. When the suction material has been completely or essentially completely suctioned out of the borehole B, the borehole B is preferably empty or essentially empty. The suction flow with which the suction material was previously suctioned out of the borehole then preferably consists of an air flow with which the interior of the borehole B can be dried. In the sense of the invention, this preferably means that air is sucked in through the second openings 18 of the nozzle 10, whereby this air flows past the inner walls of the borehole B and thereby dries the walls of the borehole B.

A computer program product (CPP) can be operated on the water supply device 50, which can control the above-described cleaning routine consisting of introducing liquid and sucking out the suctioned material. This makes it possible to provide a cleaning process for boreholes B that preferably always proceeds in the same or essentially the same way, which can, in particular, enable uniform holding forces of the boreholes B. In this way, particularly good adhesion of objects that are to be subsequently fastened in the borehole B can be achieved. For example, dowels or threaded rods can be fastened in the borehole B to attach large, heavy objects to a ceiling or a wall.

At the Figure 1 In the embodiment of the nozzle 10 shown, the suction area 14 is provided in an upper area 22 of the nozzle 10. The suction area 14 comprises an air duct 26, which in the case of the Figure 1 illustrated embodiment of the nozzle 10 in the sense external is arranged such that the air channel 26 encloses an internal liquid channel 28. The discharge area 12 is in the Figure 1 illustrated embodiment of the nozzle 10 in the lower region 24, ie in the region of the tip 20 of the nozzle 10.

At the Figure 2 In the illustrated embodiment of the nozzle 10, the suction region 14 is provided in a lower region 24 of the nozzle 10. The suction region 14 can be plate-shaped and, for example, have a circular or substantially circular basic shape. On the circumference of the plate-shaped suction region 14, which in Figure 2 As shown, second openings 18 are arranged to suck the suction material out of the borehole B. An air channel 26 is provided inside the nozzle 10, which in the case of the Figure 2 In the illustrated embodiment, the nozzle 10 is formed internally. In the upper region 22 of the nozzle 10, the air channel 26 is surrounded by the discharge region 12 with the first openings 16 for discharging the liquid or the liquid stream.

The nozzle 10 may comprise a cover 30 with which the borehole B can be covered when the nozzle 10 is arranged in the borehole B. As a result, a negative pressure U can be generated in the borehole B.

List of reference symbols

10

combined spray and suction nozzle

12

Drop-off area

14

(Suction) area

16

first openings

18

second openings

20

Tip of the nozzle or lowest area

22

upper area of the nozzle

24

lower area of the nozzle

26

Air duct, extraction duct

28

Liquid channel, supply channel for the liquid

30

cover

50

Water supply device

52

Suction hose

100

Borehole cleaning system

B

borehole

CPP

Computer program product

D

Diameter of the nozzle

U

negative pressure

Claims (15)

Combined spray and suction nozzle (10) for a water supply device (50), wherein the water supply device (50) provides a suction flow and a liquid flow comprising a liquid for the nozzle (10),
characterized in that
the nozzle (10) has a discharge area (12) for discharging the liquid and a suction area (14) for sucking away suction material with the suction flow. Nozzle (10) according to claim 1
characterized in that
the discharge area (12) forms an upper area (22) of the nozzle (10) and the suction area (14) forms a lower area (24) of the nozzle (10). Nozzle (10) according to claim 1 or 2
characterized in that
the discharge area (12) has a plurality of first openings (16) for discharging the liquid and the suction area (14) has a plurality of second openings (18) for sucking off the suction material. Nozzle (10) according to one of the preceding claims
characterized in that
the discharge area (12) is designed to be movable in order to enable good angular coverage when flushing a borehole (B). Nozzle (10) according to one of the preceding claims
characterized in that
the suction area (14) is designed to be movable in order to enable good angular coverage when sucking suction material out of a borehole (B). Nozzle (10) according to one of the preceding claims
characterized in that
a movement of the discharge area (12) and/or the suction area (14) of the nozzle (10) is formed by a rotation, an oscillation and/or a circulation of the nozzle (10) becomes. Nozzle (10) according to one of the preceding claims
characterized in that
can be connected to a suction hose (52) of the water supply device (50). Method for cleaning a borehole (B) with a water supply device (50) and a nozzle (10) according to one of the preceding claims, wherein the method is characterized by the following method steps : a) Inserting the nozzle (10) into a borehole (B), b) providing a suction flow and a liquid flow comprising a liquid by the water supply device (50), c) Dispensing the liquid through a dispensing area (12) of the nozzle (10), d) Suction of suction material with the suction flow through the suction area (14) of the nozzle (10). Method according to claim 8
characterized in that
the borehole (B) is also dried by suctioning off the suction material. Method according to claim 8 or 9
characterized in that
the nozzle (10), the discharge area (12) and/or the suction area (14) are designed to be movable in order to enable good angular coverage when cleaning and/or drying the borehole (B). Method according to claim 10
characterized in that
a movement of the nozzle (10), the discharge area (12) and/or the suction area (14) is formed by a rotation, an oscillation and/or a circulation. Method according to one of claims 8 to 11
characterized in that
the suction flow is provided by applying a negative pressure to the suction area of the nozzle (10). Method according to claim 12
characterized in that
the suction flow is provided by applying a negative pressure to the second openings (18) of the nozzle (10). Method according to one of claims 8 to 13
characterized in that
the suction flow is generated by the water supply device (50). Computer program product (CPP) for operation on the water supply device (50), wherein the method according to one of claims 8 to 14 is controllable by the computer program product (CPP).

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