DE8436583U1 - Device for testing pipes - Google Patents

Description

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Patent Attorneys 4e3ÖQüter »loh1, V * rin« iee # e, PoeHech V4

phone: (O 52 41) 130 54

G.Meldau D «sum

H.-J.StraUß Un. «FZ.tciien M 846" jS / lf.

10

15th

20th

company

Josef Messmann AhIdersweg

rapcriuur y ι

"Device for testing pipes"

The innovation relates to a device for testing pipes or the like. Made of stoneware, clay, concrete or similar, porous materials for impermeability to liquids.

I The previously usual visual inspection for defects in such

i 30 pipes is not sufficient if tightness is guaranteed

I have to. According to a proposal by DE-OS 32 11 452, darar-

i ti ge pipes filled with water, exposed to overpressure.

I Water that passes through makes imperfections recognizable and obscures I Separation of defective pipes and renovation. This pro I 35 however, especially with larger pipe diameters, requires

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substantial measures to the seal against the overpressure too reach. In addition, the pipe wall itself is subjected to tensile stress, a stress that is regularly encountered with concrete pipes leads to overloads if there are high demands on the tightness and therefore also a high overpressure for detection fine pore-like imperfections is necessary.

This is where the innovation begins, on which the task is based, a Specify generic device which avoids these disadvantages "and in which an inspection of pipes can be carried out economically in a simple manner.

According to the innovation, this task is solved by

- A portal-like frame with a portal width greater than that greatest length of the test items,

- a nozzle holder with nozzles above the test piece support, connectable to a water supply,

- a pair of faceplates, each on a faceplate carrier, where the faceplate carriers are displaceable in the direction of the axis of the test specimen and are provided with drive means for this purpose, and wherein the end disks have seals on the side facing the test object,

- a vacuum generator with drive, with its suction nozzle with one of the having an approximately centrally arranged suction opening End disk is connected and wherein a vacuum breaking device is provided.

This arrangement enables the two open ends of the pipe to be tested to be cut off with the help of the end disks. which are moved against the pipe ends via the drive of the faceplate carrier. With the help of the vacuum generator then a negative pressure is generated in the test specimen, which affects the end disks sucks against the openings. Additional forces for pressing the end disks are therefore not necessary. The pipe wall is at the applied process to pressure, which is particularly the case

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Testing of concrete pipes is important. With the help of the spray nozzles that are provided above the test piece support, the test piece sprayed with water from the outside. The water penetrating by capillary action is accelerated in the area of imperfections by the negative pressure promoted, moisture builds up on imperfections on the inner wall Spots that can be visually recognized when the test specimen has been removed from the device. To the end disks for The vacuum breaking device is advantageous to be able to withdraw removal in a simple manner. The vacuum breaker can tion can of course also be seen in the fact that when the drive of the vacuum generator is switched off, air is passed through the vacuum generator is sucked back into the test object. After removing the test specimen from the device, if there are moist stains on the basis of their size, a decision can be made as to whether the test specimen should be discarded j

is or can be redeveloped. j

It is also proposed that the end disks also yield Support elements are attached to the disc carriers. This fastening ensures that the end disks are in good contact even if the contact surfaces are not exactly angled to the pipe axis or if the pipe axis is not at right angles to the end faces.

A further development is given that the drive means of Faceplate carriers are designed as working cylinders that can be acted upon by a pressure fluid. It is further suggested that Return springs are provided. As an alternative to this, it is proposed that return counterweights be provided; in addition, it is proposed that the working cylinder which can be acted upon by pressure fluid is designed as a double-acting cylinder. This embodiment makes the drive for moving the faceplate carriers and thus the faceplates pneumatic or hydraulic causes over the working cylinder. In the case of single-acting working cylinders, return springs or return counterweights are provided to move the end disks out of their position after the vacuum has been broken.

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sition to solve. This does not apply if the working cylinder is double acting cylinders are formed.

A further development is given in that each of the spray nozzles can be shut off individually. It is also suggested that each of the spray nozzles is provided with a solenoid valve, the Solenoid valves can be operated in groups or individually. Through the Individual shut-off of the spray nozzles, it is possible to arrange the length of the spray path and thus the water consumption Adapt test objects. This significantly reduces water consumption.

A preferred embodiment is given that a Guide traverse to accommodate the drive means and the guide roll the faceplate carrier is provided. Next is presented suggest that the guide traverse and the nozzle carrier with the Spray nozzle is firmly connected. It is also suggested that that the suspension traverse can be raised and that a drive is provided for it. Finally, it is proposed that the drive as an electrically or pneumatically driven motor with gear and two cable drums is formed and that of the cable drums Outgoing cables interact with the liftable guide cross-member, with the motor on the upper cross-member of the portal-shaped Frame is arranged and the upper ends of the supports of the por tai-shaped gesture! IsUmI have scrolling for the cables. In this embodiment, the drive of the end disks is safely housed and the end disk carriers are guided so that a good contact with the end faces of the test objects is guaranteed. Due to the fixed connection between the nozzle holder and the guide cross-member there is no need for a special holder for the nozzle holder. This is This is particularly significant when the guide traverse can be lifted after the further training, then the nozzle carrier is lifted with the guide traverse. This lifting capacity allows specimens of different diameters to be carried out at a substantially constant distance between the nozzle outlet and the apex of the pipe to be tested

subject to an examination. In order to enable the guiding traverse to be lifted evenly across the portal, it is advisable to provide a motor with two cable drums, with a gear unit being suitably connected between the motor and the cable drums. Both rope pulls are each driven by a rope drum either unwound when lowering the guide cross member or wound up when the guide cross member is raised. The use of a motor ensures that the drive is synchronized. Lateral guide rails provided in the vertical supports make the guide traverse easier to move.

A special embodiment is given by the fact that av: i lower End of the supports of the portal-shaped frame each with a chassis Drive is provided. In this embodiment it is possible to have a number of modules arranged one behind the other in a test line Check pipelines one after the other without removing the pipelines have to be moved.

A control panel is provided for operation, which at least the Means for receiving the test specimen intervene in this. This control panel enables easy operation and monitoring of the Testing process possible, from this control panel at least all important processes can be switched on or off and monitored. It goes without saying that the control panel can also be provided with the switching mechanism for driving the chassis and that the desired monitoring instruments and control lights can be provided.

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A preferred embodiment is given in that the both end disks are provided with means for receiving the test specimen, with the means for receiving ^ of the test item overlap this outside and after another Al Alternatively, the means for receiving the test item are included in this fen. A further development of the latter is given by the fact that the in means engaging the test specimen form at least three segments that can be laid against the inner wall of the test specimen and - in addition - that the means that can be introduced into the test specimen are form-fitting in the interior of which insertable projections are formed. The front disk is the carrier of these means and, at least in the area the contact surface of the annular end walls with the seal Mistake. This receptacle, which is ultimately connected to the guide cross-member, allows the test item to be removed from its support. be lifted.

A further development is given that both end disks are designed to be rotatable with means for receiving the test object and at least one of them is provided with a drive. These Further development allows the test specimen, which has been picked up and lifted from its support, to be rotated during irrigation. In order to an even distribution of water over the entire outer surface of the test object is achieved.

For checking the inner surface of the test object during the Testing it is suggested that at least one of the end disks is provided with an axially displaceable lance, at the tip of which a sensor head is arranged, the lance centrally through the End disk is guided and with the sensor head on one side borrowed boom at a variable distance from the axis of the lance is arranged. It is also proposed that the sensor head a contains optical sensor and a light source. Alternatively, it is proposed that the sensor be designed as an electrical sensor which was resting against the inner wall of the test object with two springs lowing contacts is provided, a development thereby

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is characterized in that the contacts are designed as brush rollers are. This training bypasses the visual inspection after irrigation; it allows observation of the inner surface during the watering. It goes without saying that before the Observation a certain time must have passed before the water has penetrated the damaged areas and a wet stain on the wall is found formed on the inner top. This wet spot differs from the surroundings in terms of its reflectivity, with a sensor sensitive to brightness grading the dark one Discoloration of the moist area allowed to be recognized. A light source is required for the examination, which illuminates the surface in the area of the viewing angle of the sensor, whereby the sensor is protected against direct incidence of light from the light source. The light source is expediently located directly in the sensor head brought. Another optical ancestor is given by the fact that added a fluorescent dye to the sprayed water and that the excitation of the dye by a light with a spectral energy distribution outside the wavelength range of the fluorescent light takes place. It is possible to use the sensor to focus fully on the fluorescent light and its spectral energy distribution, e.g. through filters, so that the excitement does not interfere with the sensor. The electrical test proposed as an alternative to this is based on the fact that the surface conductivity the wet spot is greatly increased, with the improved guiding ability of the water through existing in the material of the test object Soluble substances - such as alkalis from binding cement in concrete pipes - or from added substances that increase the conductivity of the water Salts, is given. The increase in conductivity between the two resiliently located on the inner ^ surface of the test object Contacts signals that a wet spot has been reached. From the depth of insertion of the sensor carrier and the angular position of the sensor head the damaged area is marked on the outside using both the optical and the electrical method, the extent of which can also be determined.

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A further development is given that the lance with a Sealing head carrier is provided, the sealing head carrier being parallel runs to the lance outside the test specimen and wherein the sealing head carrier is arranged opposite the sensor head and has an application head for a sealant. It is also suggested that the application head is a spray head. Alternatively, it is proposed that the application head be a spatula head. In the end it is proposed that the spray head or spatula head is connected to a storage container for the sprayable or spatula-able sealant. This further development makes it possible to apply a sealant, e.g. a sealing slurry, a fluid or a sealing spatula, directly to the damaged areas detected by the sensor, using the spray head in such a way that the damaged area indicated on the inside is covered on the outer wall. For this purpose, the sealant becomes sufficiently wide both when sprayed on and when applied with a spatula out beyond the area covered by the sensor. The connection of the spray head or spatula head with a storage container for The sealant that can be sprayed or troweled allows automatic operation, whereby the spray or trowel head can be acted upon, for example, when the storage container is above a control is then pressurized when the sensor reports a damp spot.

A further development is given that at least one Side of the test device a septum for the spray water is arranged with a water collection container and that a pump is provided, the output of which is connected to the nozzle carrier. This arrangement makes it possible to work in a water-saving manner, since the Test is carried out with circulating water. The draining water is expediently collected in a ditch which has an overflow to a collecting container in which the suction of the pump or - when using a submersible pump - the pump itself is arranged. The overflow weir prevents coarse contaminants from entering the collecting tank. Floating impurities can be removed by a grid on the overflow.

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plant or by one in front of the overflow edge and the abltand thereof arranged retaining screed undercutting the water surface be held back.

I 5 Another development is given by the fact that at the lower end

! the supports of the portal-shaped frame each have a chassis with

? drive is provided. Through these chassis, with the help of which the

Device can be placed on rails, the test

; direction and it can move from test object to test object.

10 will drive. In addition, a process is also available in different

I dene test positions possible, whereby in the individual test positions

\ for example pipes of different materials or different

The dimensions are to be checked.

I 15 Another development is given by the fact that a control panel I preferably provided on a narrow outside of the portal

\ . is that at least with the switches and controls for the

\ Drives of the faceplate carrier of the vacuum generator for the Mag

valves of the spray nozzles and provided with a vacuum indicator

I is 20. With this control panel, the entire radio ft tion of the test device can be monitored. It goes without saying

I myself that in automatic mode displays e.g. in the form of

ί control lamps for monitoring the operational sequence are possible;

I in particular is the function monitoring of the sensor and

25 of the light head, whereby the sensor head is expediently provided with a calibration device - in the case of the optical system a phantom to be introduced into the beam path, simulating the wet spot, electrical system, a resistor to be switched between the contacts, simulating the increased conductivity is. 30th

The mode of operation in the automatic process is indicated by

a) Bringing the pipe into a test position, recording of the pipe and lifting;

b) Pulling the vacuum and sprinkling the outer wall of the 35 pipe;

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c) Rotating the pipe and checking the inner pipe wall by changing the depth of the sensor as the rotation progresses; t

d) Applying sealant to the outer wall of the <| 5 pipe in the areas where on the inner wall |

The wettest! 1 of the pipe are recognizable; |

e) After sealing all identified damp spots, put down and remove the pipe from the rack. '

10 This way of working, which can run fully automatically, is

it is easy to check pipes for damage, Ϊ

Different pipe diameters can also be tested with the test system J

can be recorded, whereby only the means for receiving the, 1

Tube or provided with means for receiving the tube f

15 end disks have to be replaced.

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The essence of the innovation is shown in detail with reference to FIGS shown as an example. Show it

Figure 1: A view of the test device in the direction of the test line

Figure 2: A plan view of the device and Figure 3: A side view of the device.

Figure 4: Detail of device with sensor and sealing head carrier In the figures, the portal-like frame 1 consists of side supports 1.1 which are connected to one another at their upper ends via an upper cross member 1.1. The support track 5 on which the test objects 2 are placed leads through this portal-like frame. Under the upper transverse traverse 1, the guide traverse 12 is arranged, which also extends over the entire width between the supports 1.2. 15th

The two end disk supports 7, which are provided with the end disks 6, are mounted displaceably in the guide traverse. whereby between the faceplate carrier 7 and the faceplate 6 elastic members 11 are interposed.

On the side of the end disks facing the test object Sealing washers 6.1 are provided, which seal against the end faces of the test object 2. One of the end disks 6 is provided with the vacuum generator 9, which acts as a side channel blower

is formed and flanged directly onto the faceplate.

The vacuum generator is driven by the Mottr 9.1, the sucked air is blown out through the nozzle 9.2. For flange-mounting on the end plate 6, in order to achieve a transition from the suction cross-section of the vacuum generator 9 to the nozzle, a Transition piece HO flanged in between.

The other of the two end disks 6 is provided with a vacuum breaker 10 which, after the test time has expired, for one Testing is opened. After the vacuum has collapsed, you can

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the end disks 6 without major forces to be overcome, be withdrawn from the examinee.

The faceplate carrier 7 are L-shaped, the horizontal legs of the faceplate carrier 7 rollers 7.1 are provided, which rest on the running surfaces of the cross member 12.

A nose 7.2 receives the pull rod 8.1 of the working cylinder 8. A working cylinder 8 is provided for each of the end disks.

The cross member 12 is to the plant over a large area of pipe diameters to make usable, arranged to be liftable, the lateral ends of the cross member 12 at the lateral Vertikai support 1.2 provided rails 16 are guided. Around To avoid tilting, it is advantageous to make the guided lengths greater than the height of the side cross member itself is. In order to be able to lift the cross member 12 without tilting, a drive is a drive motor 13, a gear 14 and two Cable drums 14.1 provided, each of the cable drums 14.1 one of the pulls 15.1 or 15.2.

When using a normal gear 14, both rotate Cable drums 14.1 in the same sense; in order to be able to lower the cross member 12 evenly via both cables 15.1 and 15.2 therefore both cable drums are charged in the corresponding winding direction be.

The cables are pulled over the upper pulleys 1.3 on the two Ends of the upper cross member 1.1 deflected and they are to the

Guide traverse 12 posted. Below the guide traverse

12 and firmly connected to it, the nozzle carrier 3 with the spray nozzles 4, which via a - connection with - not shown the water supply is connected and its spray nozzles 4 can be shut off individually via valves (not shown in detail).

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At the bottom of the side vertical prop 1.1 is on each I side of the portal a chassis 17 with a drive motor 17.1

¹ intended. It goes without saying that this landing gear is only

_; is used when the test facility is not stationary

I 5 is used, with stationary use it is advantageous i to train the test specimen support 5 as a conveyor.

A control panel 18 provided on the narrow side of the test device 1 allows all processes to be monitored and controlled.

1 Finally, FIG. 4 shows a section of the device

I. 1 for checking pipes, whereby the test item 2 in its position

I treatment of the - not shown in Figure 4 - support rails

j! 5 is held in position. The end disk 6, which is on the

I 15 end disk carrier 7 and the pull rod 8.1 with the hydraulic I or pneumatically operated pressure cylinder can be connected via

I. . these are driven against the face of the test object, with

■ the form-fit insertable into the interior of the test object 2

i sentence 30 picks up the test item. The beveled front

, ^J 20 edge of the receptacle 30 as a guide cone. The test object 2 picked up on both sides can now be lifted by lifting the guide cross-member 12

I. be lifted with the help of the tension members 15.2 and 15.1 (Fig.l).

j This makes the test item 2 rotatable. Through a - not detailed-

■ Provided - the drive on the test item 2 or advantageously

t 25 engages the end plate 6, the specimen can during treatment] Watering can be rotated around its axis. Through the end disk 6

the sensor carrier 21 is introduced, at the tip of which in the accommodated test object 2 the sensor head 22 is redial adjustable on one Extension arm 23 is attached. 30th

'. The guide bush 28 represents the pin washer bearing d & r, which the

Rotation of the end disk 6 allows -jnd at the same time takes on the sealed sliding bearing for the sensor carrier 21. Furthermore the bearing 28 is connected to the faceplate carrier 7, via which the test object 2 is lifted from its support.

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The sensor head 22 undertakes the objective examination of the inner wall on penetrating water. This is done by changing the appearance of the inner surface, which changes from a white gray on the dry surface to a dark gray on the moist surface. In order to c changes the degree of reflection of the surface and thus the constant light emitted by the light source in the sensor and reflected back to a light-sensitive cell in the sensor. In this way and In this way, the flaw in the test item can be correctly located in terms of depth and angular position. One via a connecting member 29 is rigid

jQ with the sensor carrier 21 connected sealing head carrier 24, at the tip of which a sealing head 25 is located, is axially displaced together with the sensor carrier. Sensor head 22 and sealing head 25 are facing one another - only separated by the wall of test object 2 - opposite one another. If the test head 22 finds a damp spot, the sealing I

Ig head 25 activated and this Ste'.le with a sealing clip or the like. sprayed. A design of the sealing head 25 as a spatula also allows sealing with fillers, via the advance of the sensor carrier 21 and the sealing head carrier 24 is carried out by a drive motor 26, with the sealing head carrier 24 in a socket 27 in the faceplate carrier 7 is guided and the movement of the sealing head carrier 24 is transmitted through the intermediate member 29 to the sensor carrier 21.

The water used in the test collects at the bottom of the fore |

direction and runs downhill in the collecting ditch 31, in |

the coarse impurities settle out. An overflow to a |

Collecting basin 32 allows the reuse of the 1 that has been pre-clarified in this way Water by using a pump 33, here a submersible pump. The 1st The output of the submersible pump is through a - not shown here ^ e- η

- Line connected to the DUsträger 3 (Fig.l). J

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Claims (29)

15 20 25 30 1. Device for testing pipes or the like. Made of stoneware, clay, concrete or similar porous materials for impermeability to liquids, characterized by - A portal-like frame (1) with a portal width greater than the greatest length of the test items (2) - A nozzle holder (3) with nozzles (4) above the test specimen support (5), connectable to a water supply, - a pair of end disks (6) each on a end disk carrier (7), wherein the "tirnscheibträger (7) in the direction of the axis of the test specimen (2) are displaceable and provided with drive means for this, and the end disks (6) on the test object (2) have the facing side seals (6.1), - A vacuum generator (9) with drive (9.1), with its suction nozzle (10) is connected to one of the end disks (6) having an approximately centrally arranged suction opening and wherein a Vacuum breaking device (10) is provided. 2. Apparatus according to claim 1, characterized in that the end disks (6) are attached to the end disk supports (7) with resilient support elements (11). 3. Apparatus according to claim 1 or 2, characterized in that the drive means of the end disk carrier (7) are designed as working cylinders (8) which can be acted upon by a pressure fluid. 4. Apparatus according to claim 3, characterized in that return springs are provided. - 2 - · ": · :: ·": ^": \ hüti - js / if •• »•••« • ill ι ·> ^ - • t m f 5. Apparatus according to claim 3, characterized in that return counterweights are provided. 6. Apparatus according to claim 3, characterized in that the working cylinder (8) which can be acted upon by a pressure fluid are designed as double-acting cylinders. 7. Device according to one of claims 1 to 6, characterized in that each of the spray cans (4) can be shut off individually. 8. Apparatus according to claim 7, characterized in that each of the spray nozzles ' 1) is provided with a solenoid valve, the solenoid valves being operable in groups or individually. 9. Device according to one of claims 1 to 8, characterized in that a guide traverse (12) for receiving the drive means (8) and the guide rollers (7.1) of the faceplate carrier (7) is provided. 10. The device according to claim 9, characterized in that the guide cross member (12) and the nozzle carrier (3) with the spray nozzles (4) is firmly connected. 11. The device according to claim 9 or 10, characterized in that the guide crossmember (12) is liftable, and that a drive is provided for it. 12. The device according to claim 11, characterized in that the drive is an electrically or pneumatically driven motor (13) with gear (14) and two cable drums (14.1) and that of the cable drums (14.1) outgoing cable trains (13.1, 15.2 ) interact with the liftable guide cross-member (12), the motor (13) on the upper cross-member>. (1.1) of the portal-shaped frame (1) is arranged and the upper ends of the supports (1.2) of the portal-shaped frame (l) UmlenkroHen (1.3) for the cables t ■ «III» I lilt I * * Il t I. • · * I to HI I • · · · I It I l | - • 5 5.. ·: · ":.%. ·:. Μ 846 - js / if (15.1,15.2). ί 13. Device according to one of claims 1 to 12, characterized gekehnzeich- | ₍ net that the two end disks (6) with means for receiving the &. ' Test specimen (2) are provided. jl 14. Apparatus according to claim 13, characterized in that the means for receiving the test object overlap this outside. 15. The device according to claim 13, characterized in that the means for receiving the test object engage in this. U 16. The apparatus according to claim 15, characterized in that the test piece (2) engaging in ί MUTEL at least 3 against the inner wall of the specimen · (2) form which can be placed segments. 17. The device according to claim 15 or 16, 'characterized in that j the means which can be introduced into the test object (2) is designed as a projection which can be inserted into j the interior thereof. |. I. 18. Device according to one of claims 13 to 17, characterized marked f records that at least one of the end disks (6) with means i Ϊ is provided with a drive to hold the test item (2). 19. Device according to one of claims 13 to 18, characterized in that at least one of the end disks (6) with a
axially displaceable lance (21) is provided, at the tip of which a
Sensor head (22) is arranged, the lance (21 'through centrally
the end disk i6) is guided and the sensor head (22) on a lateral support (23) at a variable distance from the
Axis of the lance (21) is arranged. 20. The device according to claim 19, characterized in that the sensor head (22) contains an optical sensor and a light source.
35 .7 & .7 "ftf -!, *:. ' * ♦ '·.:. «. M 846 - jS / if Device according to Claim 19, characterized in that the sensor head (22) is designed as an electrical probe which is provided with 2 springs which contacts bear against the inner wall of the test object (22).
5 22 * Device according to claim 21, characterized in that the sliding contacts are designed as brush rollers. 23. Device according to one of claims 19 to 22, marked thereby characterized, that the lance is provided with a sealing head support (24) (21), wherein the sealing head support (24) extends parallel to the lance (21) outside of the test specimen (2) and wherein the seal head carrier (24) an application head arranged opposite the sensor head (22) (25) for a sealant.
15th 24. The device according to claim 23, characterized in that the application head (25) is a spray head. 25. The device according to claim 23, characterized in that the application head (25) is a spatula head. 26. Device according to one of claims 23 to 25, characterized in that the spray head or spatula head (25) is connected to a storage container for the sprayable or spatula-able sealant. 27. Device according to one of the preceding claims 1 to 26, characterized in that a collecting trench (31) for the spray water with a water collecting container (32) is arranged on at least one side of the test device (1) and that a pump (33 ) is provided, the output of which is connected to the nozzle holder (3). 28. Device according to one of claims 1 to 27, characterized gekennzeich- net that at the lower end of the supports (1.2) of the portal-shaped overall > ■ · · ■ t · ι mi ι * · • · ■ ■ t t ( • · * · ■ · * ftf <f •• SB · Il ■ t> I stells (1) each a chassis (17) with drive (17.1) is provided. 29. Device according to one of claims 1 to 28, characterized in that a control panel (18) is preferably provided on a "narrow outside of the portal (1), which at least with the switches and control elements for the drives of the faceplate carrier (7) , the vacuum generator (9), for the solenoid valves of the SprM nozzles (4) and with a vacuum indicator.