DE20103407U1 - Resealable concrete sleeve - Google Patents

Description

KSG-30J1

Re-sealable concrete socket

The invention relates to a pipe connection for pipes, in particular concrete pipes with a pipe spigot and a pipe bell, containing

- a circumferential test space between two ring sealing elements and

- an annular body made of a post-sealing material, wherein the test chamber is connected to at least one test line, is to be tested with a test pressure and, if a leak is detected, the post-sealing material is to be activated.

A pipe connection of the type mentioned above is known from DE 196 01 652 A1. When a pipe spigot and a pipe bell are pushed together, a mechanical seal and a hose seal are pressed together to form a test chamber. The test chamber is connected to a test line. The hose seal is filled with a grouting material and connected to a feed channel that is connected to the test line. A gas is fed into the test chamber via the test line. If a leak is detected, the grouting material is caused to escape via the feed channel and a ring seal is positioned in front of the hose seal.

The disadvantage is that the test line runs through all the pipes. On the one hand, a lot of pipe material is used up and on the other hand, it is not certain that the test lines will not break or become clogged during pipe production. Another disadvantage is that the additional seal is too far away from the test area. In addition, it is difficult to determine which pipe seal is actually defective when there are a large number of pipe seals one behind the other.

The task therefore arises of further developing a pipe connection of the type mentioned above in such a way that the leak test and the subsequent sealing can be produced more easily and cost-effectively.

According to the invention, this object is achieved by the features of claim 1 or 2.

The advantages achieved with the invention are in particular that each test chamber can be separately tested and then, if it is leaking, sealed individually. Expensive pipe material is saved by testing and sealing on site. It is also ensured that the test pipes are not broken or blocked. By introducing the post-sealing body into the test chamber, it is ensured that a double seal, as originally intended, is still implemented. Post-sealing before the double seals, which can impair the reliability of the post-sealing, is effectively avoided.

By means of the measures listed in the subclaims, advantageous further developments and improvements of the pipe connection specified in claim 1 or 2 are possible.

·

Embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description.

Show it.

Fig. 1 a first pipe connection between two pipes in a schematic partial section and

Fig. 2 a second pipe connection of two pipes in a schematically shown partial section.

Figure 1 shows a connection between two pipes.

A pipe bell 2 made of concrete is lined with a plastic lining body 3 that extends into the pipe duct. Two sealing chambers 4, 5 are placed next to each other and spaced apart from each other in the plastic lining body 3. An external test line 8, 9 is arranged between the two sealing chambers and leads to the outside (arrow 12). The external test line 8, 9 is embedded in the concrete casing of the pipe bell 2. The plastic lining body 3 is at least partially embedded in the concrete material of the pipe bell 2.

A pipe spigot end 1 is inserted into the pipe bell with the two inserted ring sealing elements 6, 7. Once the pipe spigot end 1 is inserted, a circumferential test space 10 is formed between the pipe spigot end 1, the two ring sealing elements 6, 7 and the plastic lining body 3.

Once all pipes have been laid, air or a liquid is introduced into the test chamber 10 at a pressure of approximately 0.2 bar.

If the test chamber 10 cannot hold the pressure, this indicates a leak in one of the two ring sealing elements 6, 7. In this case, a gel is introduced via the external test line 8, 9, which forms a post-sealing body 11 that is arranged all around the test chamber 10. If the gel is capable of swelling, it is ensured that the post-sealing body 11 replaces the leaky seal.

Figure 2 shows another embodiment of a pipe connection.

In this case too, a pipe bell 22 is at least partially lined with a plastic lining body 23, into which two sealing chambers 24, 25 are placed next to each other and spaced apart. A ring sealing element 26, 27 is inserted into each of the two sealing chambers 24, 25.

The plastic lining body 23 is connected to the pipe interior 32 of one of the two pipes via an internal test line 29.

If a pipe spigot end 21 is pushed into the pipe bell 22, the pipe spigot end 21, the two adjacent ring sealing elements 26, 27 and the plastic lining body 23 form a circumferential test chamber 30.

Using a motor-driven cart, it is possible to connect a test device to the internal test line 29 and check the tightness of the two ring sealing elements 26, 27. In this case, a pressure of about 0.2 bar is also used. Gases or liquids can be used as the test medium.

If a drop in pressure is detected, there is a leak in one of the two ring sealing elements 2 6, 27. In this case, a swellable gel is introduced via the internal test line 29, which forms a circumferential post-sealing body 31 in the test chamber 30. This ensures that
the double sealing of the pipe connection is restored
is.

Claims (9)

1. Pipe connection for pipes, in particular concrete pipes with a pipe spigot end ( 1 ) and a pipe bell ( 2 ), containing - a circumferential test chamber ( 10 ) between two ring sealing elements ( 6 , 7 ) and - an annular body ( 11 ) made of a sealing material, the test chamber ( 10 ) being connected to at least one test line ( 8 , 9 ), to be tested with a test pressure and, if a leak is detected, the sealing material ( 11 ) is to be activated, characterized , - that in the tube bell ( 2 ) two circumferential sealing chambers ( 4 , 5 ) are introduced at a distance from one another, into each of which a ring sealing element 6 , 7 ) is inserted - that the test chamber ( 10 ) is to be formed with the ring sealing elements ( 6 , 7 ) resting on the pipe spigot end ( 1 ), which is connected to at least one test line ( 8 , 9 ) leading through the pipe spigot end ( 1 ) to the outside ( 12 ), and - that the tightness of both ring sealing elements ( 6 , 7 ) is to be checked via the test line ( 8 , 9 ) and, in the event of a leak, a circumferential re-sealing body ( 11 ) as a ring body made of the re-sealing material is to be introduced into the test chamber ( 10 ) via the test line ( 8 , 9 ). 2. Pipe connection for pipes, in particular concrete pipes with a pipe spigot end ( 21 ) and a pipe bell ( 22 ), comprising - a circumferential test space ( 30 ) between two ring sealing elements ( 26 , 27 ) and - an annular body ( 31 ) made of a sealing material, the test chamber ( 30 ) being connected to at least one test line ( 28 , 29 ), to be tested with a test pressure and, if a leak is detected, the sealing material ( 31 ) is to be activated, characterized, - that in the tube bell ( 32 ) two circumferential sealing chambers ( 34 , 35 ) are introduced at a distance from one another, into each of which a ring sealing element ( 26 , 27 ) is inserted - that the test chamber ( 30 ) is to be formed with the ring sealing elements ( 26 , 27 ) resting on the pipe spigot end ( 21 ), which is connected to at least one test line ( 28 , 29 ) leading through the pipe spigot end ( 1 ) into the pipe interior ( 32 ), and - that the tightness of both ring sealing elements ( 26 , 27 ) is to be tested via the test line ( 28 , 29 ) and, in the event of a leak, a circumferential post-sealing body ( 31 ) as a ring body made of the post-sealing material is to be introduced into the test chamber ( 30 ) via the test line ( 28 , 29 ). 3. Pipe according to claim 1 or 2, characterized in that the pipe bell ( 2 ; 22 ) is at least partially lined with a plastic lining body ( 3 ; 23 ). 4. Pipe according to claim 1 or 3 or 2 or 3, characterized in that a first plastic lining body ( 3 ) is connected to the external test line ( 8 , 9 ) and is arranged in a first pipe bell ( 2 ) during the formation thereof. 5. Pipe according to claim 1 or 3 or 2 or 3, characterized in that a second plastic lining body ( 23 ) is connected to the internal test line ( 29 ) and is arranged in the formation of a second pipe bell ( 22 ) therein. 6. Pipe according to one of the preceding claims, characterized in that the plastic lining body ( 3 ; 23 ) and the outer and inner test lines ( 8 , 9 ; 29 ) are formed from polyvinyl chloride (PVC). 7. Pipe according to one of the preceding claims, characterized in that the sealing is carried out with air or water. 8. Pipe according to one of the preceding claims, characterized in that the sealing material is a swellable gel, a two-component foam plastic. 9. Pipe according to one of the preceding claims, characterized in that the test pressure is 0.2 bar.