DE19630709C2 - Sliding device for a device for inspection, leak testing and, if necessary, for the rehabilitation of sewer pipes and side channels - Google Patents

Description

The invention relates to a displacement device for a Device for inspection, leak test and where appropriate, renovation of sewer pipes and Side channels according to the preamble of protection claim 1.

Such devices are in many Embodiments have become known. All embodiments has in common that with one or more driving units in a main channel is moved and that on the driving unit a guide cable is arranged on the free front End of a device for renovation and inspection of this Side channel is provided. Such a device can consist of an air bubble, for example which the side channel can be sealed airtight can then - in connection with also to the Driving units arranged air bubbles - one Leak test of duct sections including the from the side duct branching off the duct.

EP 598986 A1 shows a device for testing Channels with two to each other steplessly via a rack Pinion system sliding against each other, which Shift in the longitudinal direction of the channel takes place. On the  in the direction of displacement of the front carriage is a test head rigidly arranged. Purpose these two to each other sliding carriage is that of between the Trolley formed test room varies within the channel can be and thus the device itself can set different test situations. On Retracting the rigidly attached to the front trolley Probe in side channels branching off the channel not described and also not with the device possible.

DE 43 28 575 A1 also shows a device for Check channels that are within a channel includes movable trolley with test head, whereby between the sealing arrangements of the vehicle pivoting lock part is attached, which one Satellite probe at the free end of a telescopic Feed device carries. Through the independent telescopic feed device can Satellite probe at an angle to the longitudinal axis of the Trolley into a side channel branching off the channel be moved. The disadvantage here is that the Satellite probe of the sluice part its own, from Drive of the trolley separate feed device needed.

DE 42 20 900 A1 again shows a device for Checking channels, which provides that two of each other spaced sealing arrangements by means of a first Feed device can be moved, and regardless of the front seal arrangement by means of a second feed device relative to the first, rear seal assembly can be moved. On Retracting the seal assemblies from the channel branching side channels is not described.  

WO 94/05989 shows a device for examination, Maintenance and repair of secondary channels through insertion a camera from a main channel to a side channel Deflection frame by means of drive by recoil one after medium emerging from the rear of the camera housing. Here is a completely different feed principle of the test head for the Side channel shown.

The invention is therefore based on the object Sliding device for a device of the entry mentioned type so that a substantial simple and reliable sliding drive for the Guide cable in the side channel is suggested.

To achieve the object, the invention is completed by characterized the technical teaching of claim 1.

An essential feature of the invention is that the axial Sliding drive for the guide cable through a Shift the guide cable between the two Driving units is generated.

In a preferred embodiment of the invention it is provided that the device according to the invention is preferred used for leak testing of a duct section becomes. This channel section consists of a section of the Main channel in connection with one branching from it Section of the side channel.

Here, the device is characterized in that Leak test of a duct section of the main duct and the side channel branching from each of the Driving units with an inflatable and plug-shaped Main channel sealing rubber bubbles is connected to that at the front, free end of the guide cable another Inflatable rubber bladder that can be inserted into the side channel  is arranged, and that the displacement drive for the Guide cable is formed in that the firmly with the a guide cable connected together with this drive unit is displaceable.

This means that the guide cable is no longer from pulled out of the main channel and this Guide cable a corresponding axial displacement drive is assigned, but the guide cable becomes immediate shifted between the two driving units so that it because of this shift is now possible for the first time according to the difference in displacement this more or insert less deeply into a side channel.

In a first preferred embodiment of the present The invention therefore provides that the sliding drive of the guide cable is formed by the distance is changeable between the two driving units and that the guide cable on one of the two drive units is attached. This causes that at first the drive cable long apart stretched in the space between the two driving units is arranged and not yet in the side channel is retracted. Now the distance between the two Driving units changed, for example, the two Driving units coupled by a piston-cylinder unit are and this piston-cylinder unit is acted upon, then this leads to the guide cable in the space between the two driving units accordingly on the second (fixed) drive unit is moved because yes the distance between the two driving units is reduced. This can now be used to ensure that the front free end of the guide cable by means of a fixed driving unit attached guide device is introduced into the side channel and - with increasing Distance reduction between the two driving units -  then drives the front free end of the guide cable increasingly into the side channel.

According to the invention there is therefore no active one Sliding drive for the guide cable even in the Way that the guide cable no longer from one Length memory pulled out using frictional rollers must become. The effective length of the guide cable remains same, because only the base of the guide cable, which one is arranged on a driving unit, in comparison in Distance to the other driving unit is changed.

In another embodiment of the invention it is provided that the sliding drive of the guide cable consists of a guide ring on an axial Slidably driven guidance between the driving units is. Such a guide ring can have a revolving cable, via a piston-cylinder arrangement or moved using other shifting devices, the length difference of the guide cable from a Length memory is taken from one of the two Driving units is arranged. Such a length memory can, for example, a cable drum or a spiral cable be, which allows the guide cable from this Length memory - which is arranged in a drive unit - is pulled out. Here, too, the axial one is omitted Sliding drive of the guide cable by appropriate Friction rollers and instead just becomes a foot point or a fastening point of the guide cable in the space shifted between the two driving units, one more active feed of the guide cable into the side channel accomplish.

In a further embodiment of the present invention it is provided that the length memory of the Guide cable from a simple loop of the  Guide cable exists, the loop length of the Guide cable is changed with a sliding drive.

Common to all embodiments is that it is not What is more necessary is a frictional drive on the Guide cable to put this out of a in the main channel deduct length memory located. So there is Advantage that the entire driving unit together with the guide cables arranged on it a completely self-sufficient Unity forms for the first time for a section Leakage test can be used because all Drives for the guide cable in the area between the Driving units are arranged and also the length memory the guide cable in one of the drive units or on one of the driving units is arranged.

In the following the invention based on several Drawings illustrating execution paths explained in more detail. Here go from the drawings and their description further features and advantages essential to the invention Invention.

Show it:

Fig. 1 schematically shows a device according to the invention in a first embodiment for leak testing a channel section;

Fig. 2 schematically shows the operation of the device according to Fig. 1;

Fig. 3 schematically shows a second embodiment;

Fig. 4 schematically shows a third embodiment;

Fig. 5 schematically shows a fourth embodiment.

Referring to Figs. 1 and 2, an apparatus for leak testing sections of a main channel 30 and a branching off the side channel 31 is shown.

The device consists essentially of two mutually spaced-apart driving units 4 , 10 , of which each driving unit 4 , 10 is of identical design with regard to the drive and the sealing elements.

From an open access of the main channel 30, the air supply 1 and the control and function cable 2 will be guided through the main channel 30 to a solenoid valve and control block 3, which is disposed on the rear side of the rear drive unit. 4 The various air and supply lines and signal cables are introduced into the device from this solenoid valve and control block. The rear driving unit essentially consists of a vehicle, which is either actively driven and takes place via corresponding drive motors or which is also passively driven, namely via corresponding pulling cables, of which such a pulling cable 16 for the displacement of the front driving unit 10 is shown schematically.

A rubber bladder 12 is arranged on the rear driving unit 4 , which, when inflated, encloses the driving unit 4 from all sides and causes a completely sealed, plug-like closure in the main channel 30 at position 18 .

There is also an observation camera 7 on the driving unit 4 and there is an articulated cylinder 5 in the driving unit 4 with one end, the piston rod 5 a of which is coupled to the front driving unit 10 in a likewise articulated holding head 23 .

Furthermore, the guide cable 6 is arranged in the rear driving unit 4 , which extends into the space between the two driving units 4 , 10 and which is provided with a rubber bladder 13 at its front free end. The guide cable is an air-filled hose for the compressed air supply to the rubber bladder 13 . In special cases, additional lines are also carried in the guide cable 6 , namely electrical connecting lines for an observation and surveillance camera for positioning the free end of the guide cable 6 in the side channel. Here, the rubber bladder 13 is arranged over the housing of the surveillance camera and then seals the side channel between the rubber bladder and the camera housing.

Air connecting lines 14 and electrical connecting lines 15 go forward from the rear driving unit 4 to the front driving unit 10 . This driving unit 10 is also equipped with a rubber bladder 11 which, when fully expanded, lies all around against the inner wall of the main duct 30 and causes a plug-like, complete closure of the main duct 30 at position 19 .

The section-by-section leak test of the main duct 30 between positions 18 , 19 and 20 is carried out as follows:
First, the apparatus shown in Fig. 1 under optical observation with the observation camera 7 of the traction cable 16 and is brought to the position shown in Fig. 1 position with the aid. As soon as the front travel unit 10 is in position 19 , the rubber bladder 11 is inflated and the front airtight seal of the main channel 30 is thus formed at position 19 . Next, the guide cable 6 with the axial displacement drive according to the invention is to be inserted into the side channel 31 .

For this purpose, the piston-cylinder unit 5 a, 5 is acted on, so that the piston rod 5 a is inserted into the cylinder 5 and - after the front driving unit 10 is locked in the main channel 30 - the rear driving unit 4 is thus in the direction of the arrow 22 move to the front driving unit 10 while reducing the mutual distance 24 ( FIG. 2). Thereby, the effective length of the guide cable 6 due to the reduction in the distance 24 is reduced between the driving units 4, 10 and the front end of the guide wire 6 is inserted over a guide device 9 in the side channel 31 in the direction of arrow 21st

The guide device 9 consists of an approximately half-shell-shaped structure which is rotatably connected to the drive shaft of a rotary motor 8 . In this way, the slip into the mouth of the side channel 31 can be easily found by driving the guide device 9 (by rotation and inclination). After reducing the distance between the driving units 4 , 10 , the guide cable 6 then assumes approximately its position 6 'and the rubber bladder 13 its position 13 '. It is now filled with air, expands and lies airtight on the side channel 31 at position 20 .

Finally, the rubber bladder 12 of the rear driving unit 4 is now expanded, so that it also lies sealingly and drop-like on the inside of the main duct and the main duct and the side duct in the test area 17 are now sealed airtight between positions 18 , 19 , 20 . A corresponding overpressure can now be introduced into this test area 17 via the rear air supply 1 and via the driving unit 4 and it is measured how long this overpressure lasts. A section-by-section leak test of the main channel and the adjoining side channel 31 is thus accomplished.

It goes without saying that the exemplary embodiment shown here is only to be understood as an example. Instead of attaching a rubber bladder 13 to the front free end of the guide cable 6 , other devices can be attached to the guide cable 6 , such as. B. an inspection camera in connection with a lighting device, a refurbishment device, an injection device with which injection compound is injected into a defective side channel, or an adhesive device with which curable adhesive compounds are optionally introduced into the side channel 31 in connection with curable sleeves and glued or filled there ,

Important in this embodiment is that an axial displacement drive of the guide cable 6, is omitted in the direction of arrow 22 and in the opposite direction because the guide wire is caught in the rear driving unit 6 and the driving unit is designed to be variable, even in their distance to the front truck unit 10th

This technical teaching is shown schematically in Fig. 2, where it can be seen that it is only a change in the distance 24 between the driving units 4 , 10 is important to the guide cable 6 , the base 25 is attached to the one driving unit 4 in Insert arrow direction 21 into the side channel 31 .

An active, acting in the axial direction of the guide cable 6 the axial displacement drive for the guide cable 6 can thus be omitted.

Fig. 3 shows a modified embodiment in which it can be seen that instead of the piston-cylinder arrangement 5 , 5 a and a fixed distance between the driving units 4 , 10 can be provided, which distance z. B. is accomplished by an articulated connection 29 as shown in FIG. 3. On this articulated connection 29 , a guide ring 26 can be displaced in the axial direction, to which guide ring 35 the guide cable 6 is fastened. The displacement drive for the guide ring 26 is accomplished by a circumferential cable 27 , which is guided over a deflection roller 28 , the deflection roller 28 being arranged in one of the driving units 4 , 10 and at least one of the deflection rollers 28 being driven in rotation.

The guide cable 6 can in this case be withdrawn from a length memory, which is implemented as an example as a cable drum 34 which is arranged in the rear driving unit 4 . If the cable 27 is now moved in the direction of the arrow 22 by appropriate drive of one of the deflection rollers 28 , then the guide cable 6 is likewise moved into a side channel 31 in the direction of the arrow 21 .

Fig. 4 shows a modification of the embodiment of FIG. 3, where it can be seen that the length memory is not designed as a cable drum 34 but only as a cable loop 32 , the base 25 of which is attached to the front driving unit 10 . The displacement drive for the guide ring 26 can be carried out by a piston-cylinder unit 36 , which is only shown schematically, which is arranged in the rear driving unit 4 .

FIG. 5 shows, as a further modification that the length of memory instead may also be designed as a cable 33 as a cable storage drum 34. In this case, the guide wire 6 is wound spirally so as to form the length memory which can be moved out of which the guide cable 6 pulled out in the direction of the arrow 22 and also in the opposite direction to the direction of the arrow 22.

Here too, the guide cable 6 is held in a fastening 35 on the axially displaceable guide ring 26 .

drawing Legend

1

air supply

2

Control and functional cables

3

Solenoid valve and control block

4

Driving unit (rear)

5

cylinder

5

a piston rod

6

management cable

6

'' Guide cable

7

Surveillance cameras

8th

rotary engine

9

guiding device

10

Driving unit (front)

11

Rubber bladder (front)

12

Rubber bladder (rear)

13

Rubber bladder (side)

13

'' Rubber bladder (side)

14

Lufverbindungsleitung

15

connecting line

16

rope

17

inspection

18

position

19

position

20

position

21

arrow

22

arrow

23

holding head

24

distance

25

nadir

26

guide ring

27

rope

28

idler pulley

29

connection

30

main channel

31

side channel

32

cable loop

33

cable storage

34

cable drum

35

attachment

36

Piston-cylinder unit

Claims (9)

1. Sliding device for a device for inspection, leak testing and, if necessary, refurbishment of sewer pipes and side ducts with at least two driving units ( 4 , 10 ) that are spaced apart and displaceable in the main duct ( 30 ) and a guide cable ( 6 ) that can be inserted into the side duct ( 31 ) , which is attached to one of the two travel units ( 4 or 10 ) and to which an axial displacement drive is assigned, characterized in that the displacement drive for the guide cable ( 6 ) can be produced by a mutual displacement of the two travel units ( 4 , 10 ) relative to one another is. 2. Device according to claim 1, characterized in that the base ( 25 ) of the guide cable ( 6 ) is attached to one of the two driving units ( 4 or 10 ). 3. Device according to one of claims 1 or 2, characterized in that the displacement drive of the guide cable ( 6 ) consists of a guide ring ( 26 ) which is displaceably driven on an axial guide between the driving units ( 4 , 10 ) ( Fig. 3rd ). 4. Device according to one of claims 1, 2 or 3, characterized in that the guide cable ( 6 ) from a length memory ( 34 , 32 , 33 ) is withdrawn ( Fig. 3-5). 5. Apparatus according to claim 1 to 4, characterized in that the displacement drive consists of a between the drive units ( 4 , 10 ) arranged between the pulleys ( 28 ) displaceably driven rope ( 27 ) ( Fig. 3). 6. Device according to one of claims 1 to 5, characterized in that the displacement drive consists of a piston-cylinder unit ( 36 ) ( Fig. 4). 7. Device according to one of claims 1 to 6, characterized in that the two driving units ( 4 , 10 ) are each actively driven separately from each other. 8. Device according to one of claims 1 to 6, characterized in that only one of the two driving units ( 4 or 10 ) is actively driven and that the other driving unit ( 10 or 4 ) is displaceable in the main channel by a traction cable ( 16 ). 9. Device according to one of claims 1 to 8, characterized in that the distance between the two driving units ( 4 , 10 ) is constant, and is bridged by an articulated connection ( 29 ).