DE8712537U1 - Cleaning pipe for continuous sewage pipes - Google Patents

Description

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The innovation concerns a cleaning pipe of the type specified in the preamble of claim 1.

Such cleaning pipes were previously usually installed in the continuous pipe line, &zgr;·&Bgr;. in the basement floor, whereby access to the cover and, after removing it, to the inspection shaft was always possible through an inspection shaft covered on top. If it later became necessary to install a shut-off device, e.g. due to overloading of the sewer network or to protect the building or when installing a sewage lifting system, then the installed cleaning pipe had to be removed at considerable expense and replaced by a cleaning pipe with at least one backflow stop. This required considerable construction work. If it became necessary at a later point in time, e.g. because a toilet or urinal had to be installed in the basement of a granny flat, to make the shut-off device suitable for sewage containing faeces, the cleaning pipe with the backflow device for sewage free from faeces had to be broken out of the basement floor and a cleaning pipe with a backflow device for sewage containing faeces had to be installed. This required a great deal of construction work. Backflow devices for sewage free from faeces contain at least one operating closure in the form of a backflow flap, which keeps the pipe closed in the normal state and closes it even more tightly in the event of backflow due to water pressure, but opens again automatically once the backflow has ended and the water flows through in the direction of drainage. The relevant regulations can be found in DIN standard 1997, part 1, which also stipulates that in addition to this operational closure, the backflow device must contain an emergency closure, with which the pipe can be closed at will by actuating it. However, this emergency closure is only required in the Federal Republic of Germany, while other countries only require the operational closure. A backflow device for sewage containing faeces requires at least one operational closure, which must be open under normal conditions, i.e. when there is no backflow, and is usually formed by a backflow closure flap that is then held in the open position. The relevant regulations are contained in DIN standard 19578, part 1. This also requires that a suitable sewage containing faeces

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The backflow preventer must contain an emergency closure* with which the pipe can also be closed at any ^time by actuating it. This emergency closure is also usually formed by a backflow preventer flap. However, not all countries require this emergency closure. The construction work required to convert from one sewage system to another is expensive and labor-intensive for the builder.

The innovation is based on the task of creating a cleaning pipe of the type mentioned at the beginning, with which any construction work for the building owner to convert to the various wastewater systems is avoided. The task is solved in accordance with the innovation with the features specified in the characterizing part of claim 1.

Based on the base body of the cleaning pipe, which the builder must install anyway for inspection purposes when constructing the building, the two kits can be used to convert to a different sewage system at any time, i.e. for sewage free of faeces with a risk of backflow and for sewage containing faeces with a risk of backflow, without any changes being necessary on site. All that is needed is to remove the cover from the cleaning pipe and insert the respective kit into the base body in order to meet the new requirements quickly and easily. This is not only cost-effective and involves less work for the builder, but also for the wholesaler, who simplifies inventory because the base body is the same for all sewage systems and only the kits differ from one another.

The kits were designed in such a way that they either meet the standards applicable in the Federal Republic of Germany or the regulations in other countries, i.e. that either an operating closure and an emergency closure or only an operating closure for the respective sewage system is included in the kit.

A practical embodiment is shown in claim 2. The backflow flaps of the first kit thus meet the requirements of DIN 1997, because the two backflow flaps automatically close in the event of backflow.

close, then open again without external influence after the backflow has been eliminated. The backflow closure flap or the flaps of the second kit are coupled with a swivel drive so that they are held in the open position in accordance with DIN regulations during operation and are only closed in the event of a backflow.

The embodiment according to claim 3 is specifically tailored to the DIN standards in the Dutch Republic of Germany. Theoretically, more than two back-pressure relief valves could be provided for each valve cover. However, two are sufficient for the requirements that arise in practice.

Another important idea is contained in claim k . The kits here include insert parts that form the sealing seats for the backflow flaps, so that the sealing requirements are easily met. In principle, it would be conceivable to provide the cleaning pipe with the base body in the basic design with molded-in sealing sites, for which no insert parts are then required. This would mean that stop surfaces for the flaps are firmly molded into the base body. On the other hand, the insert parts have the advantage that they can be removed even after a long period of operation and, if necessary, replaced with new ones or cleaned.

The embodiment of claim 5 is also expedient because it ensures a simple and functionally reliable attachment of the backflow closure flaps, which can even be removed if necessary and do not require any special mounting on the base body or on the closure cover.

The feature of claim 6 is also important because it eliminates the need for additional position securing parts for the insert parts or backflow closure flaps, and on the other hand, when the closure cover is removed, the removable parts can be accessed immediately. The cover presses on the insert part and covers it like a shoulder for better position securing.

A safe function with good sealing effect is achieved in the embodiment according to claim 7. The angle lever offers a heavy weight displacement

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for automatic closing and particularly favorable turning conditions.

For sewage containing faeces, it is difficult to ensure a perfect seal in the event of a backflow. With the embodiment according to claim 8, the pot-shaped sealing element with its cavity achieves a perfect sealing effect even if a solid object should become trapped between the backflow closure flap and the sealing seat, which can never be avoided in sewage containing faeces.

The good sealing effect in waste water containing faeces is also due to the feature _;

times of claim 9, because the widened soft rubber seal together " ^:

men with the cup-shaped sealing element can also cope with larger, hard objects without losing the sealing effect.

Another important idea is contained in claim 10. This is the return f

The drive which acts on the lock flap is responsible for the so-called emergency shut-off |

It is designed as a closure that can be closed at will in the event of a backflow.

Since the drive is also able to ventilate the backflow flap again after the end of the backflow situation, the risk of the backflow flap sticking and

no longer works properly. _k

In accordance with German regulations, the embodiment according to claim 11 is also appropriate because the two backflow stop flaps are kept open in the normal operating position and can only be closed arbitrarily in an emergency. ^:

Finally, the embodiment of claim 12 is also useful, which relates to a sewage system containing faeces, in which at least one backflow closure flap is automatically moved from the operating position to the closed position via the liquid sensor when a backflow occurs.

Based on the drawings, the design forms of the innovation object are

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Fig. 1 shows a longitudinal section through an embodiment of a conventional cleaning pipe,

Fig. 2 a first kit for the cleaning pipe of Fig. 1,
Fig. 3 shows a second kit for the cleaning pipe of Fig. 1, Fig. ¹ T the cleaning pipe of Fig. 1 with the first kit and Fig. 5 shows a cleaning pipe modified in detail, basically corresponding to the cleaning pipe of Fig. 1, with the second kit.

A cleaning pipe 1 according to Fig. 1, which is, for example, concreted into a basement floor and there allows a control function in the connecting line between a toilet, bath, shower, washbasin, washing machine or the like and the further sewer system, has a base body 2 in which an inspection shaft 3 is formed which is open at the top and has an inspection opening f at the top. The opening 4 is surrounded by an inspection shaft opening edge 5. On the inlet side, the base body 2 has a connection piece 8, while on the outlet side a connection piece 6 is provided. In this embodiment of the cleaning pipe 1, a blunt end 9 and a spigot end 7 are connected to the pieces 8 and 6, for example by means of tensioning straps, in order to be able to exchange and vary. However, it would also be conceivable to form the cleaning pipe 1 in one piece with the parts 7 and 9. A cover 10 is removably attached to the opening edge 5 and sealed with seals. By lifting the cover 10, you have free access to the inspection shaft 3 and can clean the line without hindrance.

The cleaning pipe 1 is equally suitable for sewage containing faeces and sewage free of faeces. In the event of a backflow, however, the sewage backing up in the sewage system can reach the connected devices via the cleaning pipe and escape from them. To prevent this, the cleaning pipe 1 of Fig. 1 is designed in such a way that a backflow device for sewage free of faeces can be used as a first kit A according to Fig. 2. This consists of a closure cover 11, the edge dimensions of which correspond to those of the closure cover 10 of Fig. 1, as well as a rear backflow closure flap 12 and an inner

Distance behind it is arranged second backflow closure flap 13. With this kit A, the cleaning pipe 1 can be made into a backflow device for sewage free from faeces, provided that 2 sealing seats are attached or molded into the base body. The two backflow closure flaps 12 and 13 are at least functionally connected to the closure cover 11 in a manner not further highlighted, ie they are molded onto it or attached to it. However, it is also conceivable to provide the two backflow closure flaps 12 and 13 as separate insert parts separated from the closure cover 11.

If authorities do not set mandatory closure regulations, the second backflow flap 13 with its drive (to be explained later) can be omitted, as indicated by the dot-dash line x. The closure cover 11 would then look in its right half in Fig. 2 exactly like the closure cover 10 according to Fig. 1.

In the first kit A, the backflow closure flap 12 has a pivot axis 1* for an L-shaped angle lever 16, to which a disk-shaped flap body 17 with a peripheral seal 18 is attached. The pivot axis 1k can be arranged in a bearing 15 which is either attached to the closure cover 11 or is separate from it. The pivot axis 1* can conveniently be lifted out of the bearing 15.

The second backflow closure flap 13 is designed essentially the same as the first closure flap 12. Its pivot axis is arranged in a bearing 19. A pressure cam 20 is formed on its angle lever, which has an upper pressure surface and lateral ears 22. In the closure cover 11, a shaft with a square 24 is rotatably mounted, on which a locking cam 21 is arranged, which can work together with the pressure surface on the pressure cam 20 and has projections 23 which, in a certain rotational position of the square 2k , grip under the ears 22 in order to lift the backflow closure flap 13. A manual operating lever 25 is connected to the shaft carrying the square 2k , which is between the two points indicated by a double arrow.

can be moved back and forth between the highlighted positions. In the position of the hand lever 25 shown in solid lines, the rear firing pin 13 is

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locked in its closed position. In the position of the hand lever 25 shown in dotted lines, the backflow flap 13 can be freely pivoted.

£ An electromotive drive could also be mounted on the shaft carrying the square 2&PSgr;

Drive so that the emergency operation of the backflow flap 13 could also be carried out remotely.

In order to create a backflow closure for sewage containing faeces, the cleaning pipe 1 according to Fig. 1 is converted with a second kit B according to Fig. 3, which has a closure cover 26 corresponding in outline to the closure cover 10 of Fig. 1. Furthermore, the second kit B \ includes a first backflow closure flap 27 and a second backflow closure

flap 28, which are provided at a sufficient distance from each other and functionally cooperate with the closure cover 26.

Both backflow closure covers 27 and 28 can be attached or attachable to the closure cover 26 or can also form separate insert parts that can be inserted into the inspection shaft 3 of the cleaning pipe 1. Provided that corresponding sealing seats are attached or can be inserted in the cleaning shaft 3 of the base body 2, the two backflow closure flaps 27 and 28 then work together with these sealing seats as backflow closures.

The backflow closure flap 27 in the second kit B according to Fig. 3 has a pivot axis 29 for a pivot lever 30 which is connected in one piece to a flap body 3f and contains a guide curve 31 which works together with a control element 32 which belongs to a rotary drive 33 which is housed in the closure cover 26. A pot-shaped, elastic sealing element 35 is attached to the flap body 3f which contains a reinforcement plate 36 and defines a cavity 37. In the basic position, the backflow closure flaps 27 and 28 are held in the raised position shown in Fig. 3 because, according to the standard regulations, the backflow closures for sewage containing faeces must be open in the normal operating position.

Furthermore, a liquid sensor 38 is attached to the cover 26, which is connected via a signal line to a control device (not shown).

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The rotary drive 33 is connected to the control device via a line 40.

The backflow closure flap 28 corresponds essentially to the backflow closure flaps 12 and 13 of Fig. 2. The only difference is that its angle lever 43 is in positive connection via a joint 42 with a pivot cam 41, which sits on the shaft carrying the square and can be rotated by means of a hand lever 45.

In the second kit B, the second backflow closure flap 28 with its rotary drive can also be omitted if the respective local requirements only require a single backflow closure flap 27. The closure cover 26 would then be designed in its right half in Fig. 3 in accordance with the closure cover 10 of Fig. 1.

In Fig. 4, the cleaning pipe 1 of Fig. 1 is converted into a backflow valve 1A for sewage-free wastewater using the first kit A. In addition to the embodiment of the first kit A shown in Fig. 2, the pivot axis 14 of the backflow valve 12 is mounted in an upper part 47 of an insert part 48, which is pushed into the inspection shaft from above and secured in position on a seat 50 formed there. The closure cover 11 rests on the upper part 47 from above and in this way secures the insert part 48 against being pushed out and moved sideways. The insert part 48 forms a sealing seat 49 for the backflow valve 12.

Similarly, for the second backflow closure flap 13, an insert part 54 is inserted from above and fixed on a seat 51 formed in the base body 2, which forms a sealing seat 55. The upper part of the insert part 54, designated 53, is fixed from above by the closure cover 11. In Fig. 4, the backflow closure flap 13 is locked in its emergency closure position, while the backflow closure flap 12 can pivot freely.

According to Fig. 5, a backflow preventer is formed from a base body 2', already explained with reference to Fig. 1, with a one-piece spigot end 7 ^l and stub end 9'.

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Closure IB' for waste water containing caustic water is formed by means of the second kit B. However, the second kit B is expanded compared to the embodiment of Fig. 3 by insert parts 57 and 61, which form sealing seats 59 and 62 for the two backflow closure flaps 27 and 28. The insert part 57 is supported by a projection 58 on the bearing 50 of the base body 2 and is secured in position from above on its upper part 56 by the closure cover 26. The sealing seat 59 is formed here by a wide foam rubber or flexible rubber seal, which works excellently with the pot-shaped sealing element on the backflow closure flap 27 to ensure a perfect sealing seat even when impurities or solid particles are clamped between them.

The insert part 61 is also fixed from above via its upper part 60 by the closure cover 26 and pressed onto a seat 51 in the base body 2'. The seats 50 and 51 are also provided in advance in the base body 2 of the cleaning pipe 1 according to Fig. 1. The pivot axes of the two backflow closure flaps 27 and 28 are mounted on the upper parts 56 and 60 of the insert parts 57 and 61, respectively, in the embodiment according to Fig. 5.

In Fig. 5, the backflow device IB ¹ for sewage containing faeces is shown in its normal working position, in which the two backflow closure flaps 27 and 28 are held in their open position. If a backflow occurs, the liquid sensor 38 detects this and controls the drive 33 via the control device (not shown) so that it pivots the backflow closure flap 27 into its closed position and prevents the sewage from being pushed back beyond the stump end 9'. In addition, the second backflow closure flap 28 can also be brought into the closed position by hand using the handle k5 (emergency closure). It would also be conceivable to operate the second backflow closure flap 28 remotely using an electric motor drive.

The individual components of the design forms in Fig. 1 to 5, except the shafts, drives and seals, are made of a wastewater-resistant plastic, die-cast, light metal or cast iron.

Claims (1)

PATENT ATTORNEY! DIPL.-ING. VOLKER £ASJSE EUROPEAN PATENT ATTORNEY Telephone 0841/81082 and 82083 Tel. 55 880 sas d Fax (0841) 82083 11.09.1987
Ks-76 Gm &bull;Patemanirald Dipl.-Ing. V. Sasse, Parrentstr. 27, 8070 Ingolstadf S/M Registrant: Bernhard Kessel, Bahnhofstr. 3 L 8071 Lenting Cleaning pipe for continuous sewage pipelines Protection claims 1. Cleaning pipe for continuous sewage pipelines, with a base body having an inspection shaft with connecting pieces arranged at both ends and with a removable closure cover closing the inspection shaft opening on the inspection shaft opening edge, characterized by two optionally attachable kits (A, B) for the inspection shaft (3) of the base body (2, 2'), each of which consists of a closure cover (11, 26) and at least one backflow closure flap (12, 13; 27, 28) which is at least functionally connected to the closure cover (11, 26), the base body (2, 2') with the first kit (A) having a backflow device (IA) for sewage-free wastewater, ie the backflow closure flap (12, 13) hangs freely swinging in front of the throughflow opening in the normal operating state, and with the second kit (B) forms a backflow device (IB ¹ ) for sewage containing faeces, ie the backflow flap (27, 28) is kept free of the flow opening in the normal operating state. 2. Cleaning pipe according to claim 1, characterized in that the backflow closure flap (12, 13) of the first kit (A) is freely pivotable, Bank accounts! Deutsche Bank Ingolstadt 23 Ip 3Io BLZ 71170007 .. ..PostschccUtonto-Munich* <t«5 940'8oo BLZ 700I0070 while the backflow flap (27, 28) of the second kit (B) is coupled to a swivel drive (33, 45) arranged in the closure cover (26). 3. Cleaning pipe according to claim 1 and 2, characterized in that both kits (A, B) each consist of the closure cover (11, 26) and two backflow closure flaps (12, 13, 27, 28) arranged at a distance one behind the other. 4. Cleaning pipe according to one of claims 1 to 3, characterized in that the backflow closure flap (12, 13, 27, 28) of each kit (A, B) includes an insert part (48, 54, 57, 61) which can be fitted into the inspection shaft (3) and forms a sealing seat (49, 55, 59, 62). 5. Cleaning pipe according to claim 4, characterized in that the backflow closure flaps (12, 13, 27, 28) are pivotably mounted, preferably liftable, on the insert part (48, 54, 57, 61). 6. Cleaning pipe according to at least one of claims 1 to 5, characterized in that the closure cover (11, 26) closing the inspection shaft opening (4) and sitting on the opening edge (5) presses against the insert part (48, 54, 57, 61) and secures this and, if applicable, the backflow closure flap (12, 13, 27, 28) in the inspection shaft (3). 7. Cleaning pipe according to one of claims 1 to 6, characterized in that the backflow closure flaps (12, 13, 27, 28) of the two kits (A, B) each have a flap body (17, 34) fastened in an angle lever (16, 30, 43) with a peripheral seal (18, 35). 8. Cleaning pipe according to claim 7, characterized in that at least one backflow closure flap (27) of the second kit (B) has a cup-shaped sealing element with a cavity (37) attached to the flap body (34) as a peripheral seal (35). 9. Cleaning pipe according to claims 4 and 8, characterized in that Hi it ti «· *·** I * &diams; · &ogr; 4 « · at least the insert part ( 57) associated with the backflow prevention cap ( 27) with the pot-shaped sealing element has a circumferential, widened rubber sealing strip (59). 10. Air pipe according to at least one of claims 1 to 9, characterized in that an externally operable mechanical and/or electric motor drive (25, 2k, 21, 23) is provided in the closure cover (11) of the first kit (A) for the deliberate closing and, if necessary, venting of at least one backflow closure flap (13). 11. Cleaning pipe according to at least one of claims 1 to 9, characterized in that in the second kit (B) the backflow closure flap or flaps (27, 28) are each coupled to a pivot drive (33, 45, 41, 42) arranged in the closure cover (26)* 12. Cleaning pipe according to claim 11, characterized in that a liquid sensor (38) projecting into the inspection shaft (3) is arranged in the closure cover (26) of the second kit (B), that the pivot drive (33) of at least one backflow closure flap (27) has a drive motor connected to a control device, and that the liquid spring (38) is connected to the control device for switching on the drive motor in a signal-transmitting manner.