DE3941884A1 - Concrete water drainage pipe - consists of lengths joined end-to-end with sealing ring between end faces - Google Patents

Abstract

The concrete water drainage pipe is constructed from lengths of pipe joined end-to-end with a sealing ring fitted between the joint faces. Each length of pipe (1)has a guide ring (4) projecting from one end and firmly fixed to the concrete. This guide ring (4) guides the elastomeric selaing ring (6) and the next length (1') of concrete pipe into position as the two lengths (1,1') are placed end to end. The axial length of the sealing ring (6) is such that it extends to the portion of reduced dia. of the adjoining length of pipe (1'). The guide ring (4) extends beyond the end of the sealing ring (6). USE - Concrete water drainage pipes.

Description

The invention relates to a pipe connection for drainage ducts when driving with concrete pipes, on one of them Tube ends each have a radially non-expandable, by An concreting during the manufacturing process of the concrete pipe radially outer guide ring attached on one side which protrudes axially over the end wall of the pipe end, but not radially beyond the contour of the pipe string protrudes.

According to leaflet M 151 of the Sewage Technology Association. V. (ATV), D-5205 St. Augustin 1, "General principles for pipe connections of drainage channels and pipes for pipe jacking", edition June 1985, is between pipe connections with loose (picture 2 ) and with one-sided (picture 1 ) Differentiate guide rings. Pipe connections with (double-sided) loose guide rings are usually used for those pipes in which, due to the special manufacturing process, one-sided fastening of the guide ring is not possible during the manufacture of this pipe. As far as the lo sen guide rings in such pipes such. B. stone pipes, for reasons of assembly safety already pre-assembled on one side on the pipes in the pipe works, it is necessary to prevent the development of changes in position and deformation of the guide rings, the pipes in a package to la together and to send. This packaging is expensive and only for relatively short pipes of smaller nominal widths - such as. B. with the stoneware pipes - possible.

Concrete pipes, which due to their greater length, their greater wall thickness and their up to approx. DN 4000 Diameter considerably heavier and unwieldy than z. B. Stoneware pipes are usually suitable not for packaging. In order to keep the sweat in concrete pipes Pre-assembly of the loose guide rings on the construction site to avoid this, they are already in the pipe works at the Fer cleaning of the concrete pipes on the outer wall of one pipe end fixed on one side by concreting. The water tightness of this attachment is questioned if himself - e.g. B. when transporting the pipes - by on the feet ring and blows and / or by Wit influences the fastening of the guide ring the outer wall of the concrete pipe - at least on one or elsewhere - loosens in mostly invisible ways. This leads to water circulation at these points, which confirms the tightness of the finished pipeline the known adverse consequences for groundwater and endanger the waste water treatment. When sealing the located between the insertion tube and the guide ring Gaps with a loose sealing ring are further sources of error len given such. B. Ver for cost reasons too small or insufficient quality the sealing rings, incorrect pre-assembly for rolling rings, un even curling, twisting, etc., which too Leaks in the pipe connection.

The invention has the task of a pipe connection of a to create the type mentioned, in which the tightness between the guide ring and the outer wall of the concrete pipe even if the attachment is loosened Guide ring is further guaranteed and at the Monta error when sealing the insertion tube reliably be avoided.  

This task is accomplished according to the invention by the union solved the following features:

• a) in the axial area of the pipe end, that of the concrete Guide ring is covered is between the outside wall of the concrete pipe and the guide ring an axial inner seal of an elastomeric sealing element orderly,
• b) the section of the radially unilateral attachment of the Guide ring on the outer wall of the concrete pipe at least around the axial extent of the contact surface the inner seal that this in the axial area of the Tube end occupies, axially shorter than the ge accounts for the entire axial width over which the guide ring in the axial area of the pipe end is sufficient,
• c) the inner one arranged in the axial region of the pipe end The seal is radial over the one de end wall of the concrete pipe going axially axial extension with an axially outer seal the gap between the guide ring and the Insert tube seals, firmly connected.

Due to the on the outer wall of the concrete pipe and on the radi alen inner wall of the guide ring arranged axially inner seal of the elastomeric sealing element is the tightly critical interface between the concreted feet ring and outer wall of the concrete pipe securely sealed against water circulation if the attachment of the guide ring on the outer wall of the Has loosened the concrete pipe. The result of the plant resulting in the inner seal on the guide ring - in the As a rule, relatively small - axial shortening of the section the radial one-sided attachment of the guide ring has on the outer wall of the concrete pipe in terms of Durability of this attachment on the transport when Installation and no disadvantage in long-term operation Foils if when dimensioning the axial width of the Füh  ring in the axial area of the pipe end early forth a length surcharge to prevent water circulation ability was taken into account. Where this was not the case must now be the part of the guide ring that extends over the Axial region of the pipe end extends, for the sake of secure fastening of the guide ring to the concrete pipe taking into account the axial width of the contact surface surface of the inner seal should be axially wider will measure.

The from the inner seal over the front wall of the Be Tonrohres axially extending axial extension with the axially outer sealing ring in a defined Ab stood firmly connected from the end wall of the pipe end, which of the assembly and functional position of the outer sealing ring in the between the guide ring and the gap located in the insertion tube. Due to the fact that this is usually done at the factory The elastomeric sealing element can be pre-assembled the construction site errors in the selection and preassembly of the outer sealing ring and when retracting the insertion tube in the axially over the end wall of the other pipe end Avoid protruding guide ring and tightness the pipe connection also in this sealing section guarantee.

According to an advantageous embodiment of the invention for still assembly and functional reliability the pipe connection provided that at least one of the elastomeric parts of the sealing element, such as inner ones tion, axial extension or outer sealing ring, through Gluing or vulcanization attached to the guide ring is.

Another training of the he serves the same purpose Pipe connection according to the invention, according to the at least one the elastomeric parts of the sealing element, preferably the outer sealing ring, by means of a clamping ring on the  ring is attached.

According to another development of the invention itself - possibly with the omission of a bond, Vulkanisa tion or clamping - a particularly simple and funk tion-safe pipe connection in that the axial Extension has an axial stiffness that a shear-proof position of the outer sealing ring during assembly of the insertion tube and with external water pressure guaranteed.

Pre-assemble the inner seal on the concrete pipe more easily or to make them simple when manufacturing the concrete pipe Close to the end wall formwork of the concrete pipe Being able to connect is an advantageous Embodiment of the invention proposed that one of the axial extension outgoing flange into the radial between the two concrete pipes Butt joint is enough. With this in the radial butt joint pinched flange will also be the inner seal even with high external pressure due to the presence of groundwater in its position ensuring the tight function in the The end wall of the pipe end of the sealing groove remains captured.

Based on the embodiment shown in the drawing games, the invention is explained in more detail. It show in partial axial cross section

Fig. 1, the tube end of a concrete pipe with it anbeto ned guide ring,

Fig. 2 shows a complete pipe joint of two concrete pipes before operating with a guide ring and endmontiertem sealing element,

Fig. 3 shows the pipe end of a concrete pipe with a concreted guide ring and a concrete pre-assembled sealing element.

In Fig. 1, the concrete pipe 1 manufactured for the construction of a drainage channel in the tunneling process has at its pipe end 2 a sealing groove 5 running along its end wall 3 on the guide ring 4 cast in concrete.

In Fig. 2 is in the sealing groove 5 of the pipe end 2 an axially inner seal 6 of the elastomer Dichtele element 7 under radial compression, whereby the connec tion between the guide ring 4 and the outer wall of the concrete pipe res 1 is securely sealed. The flange 8 adjoining the seal 6 extends into the butt joint 9 located between the two concrete pipes 1 and 1 '. The flange 8 is used when inserting the seal 6 in the sealing groove 5 as a work-saving stop surface for the Mon days of the seal 6 . In the operating state of the drainage channel, the flange 8 clamped in the butt joint 9 also serves as an axial abutment for the seal 6 when the water acts on the seal 6 . The extending from the flange 8 axially to the axially outer sealing ring 10 , the axial extension 11 of the sealing element 7 forms due to their large radia len wall thickness and the resulting axial stiffness, the position fixing of the sealing ring 10 when installing the insert tube 1 'required axi ale Support. In the same way, the axial extension 11 is effective in the event of strong external water pressure, which in the absence of this axially stiff extension 11 and the flange 8 urge the sealing ring 10 radially deformed in the gap 12 into the butt joint 9 and thereby the sealing of the pipe connection against pressures of the groundwater. The rest of the butt joint 9 shown here is filled with a pressure transmission ring 13 made of waterproof glued plywood.

In the sealing element 7 shown in FIG. 3, the axially inner seal 6 was already concreted into the wall of the concrete pipe 1 during its manufacture. This eliminates all subsequent sealing-relevant pre-assembly work both in the pipe mill and at the construction site. The seal 6 has a plurality of axially projecting sealing ribs 14 and a sealing lip 15 , which ensure that the seal 6 is securely anchored in the wall in the wall of the concrete pipe 1 . The remaining parts of the sealing element 7 are very similar to those of the sealing element 7 is provided in Fig. 2.

Reference symbol list

1 and 1 ′ concrete pipes
2 pipe ends (of 1 )
3 end wall (of 2 )
4 guide ring
5 sealing groove
6 seal (axially inner)
7 sealing element
8 flange
9 butt joint
10 sealing ring (axially outer)
11 extension (axial)
12 gap (between 1 ′ and 4 )
13 pressure transmission ring
14 sealing ribs (on 6 )
15 sealing lip (at 6 )

State of the art mentioned in the patent application:

"General principles for pipe connections of drainage channels and pipes in pipe jacking "leaflet M 151 of the Sewage Technology Association e. V. (ATV), D-5205 St. Augustin 1 - June 1985 edition.

Claims (5)

1. Pipe connection for drainage channels during tunneling with concrete pipes, at the one pipe ends of which a radially non-expandable, by concreting during the manufacturing process of the concrete pipe radially outside einsei fixed guide ring is arranged, which projects axially over the end wall of the pipe end, but over the con ture of the pipe string does not protrude radially, characterized by the union of the following characteristics:

• a) is covered in the axial region of the pipe end (2), the th from anbetonier guide ring (4), an elastomeric sealing element (7) arranged an axially inner seal (6) between the outer wall of the concrete pipe (1) and the guide ring (4) ,
• b) the section of the radially unilateral fastening of the guide ring ( 4 ) on the outer wall of the concrete pipe ( 1 ) is at least around the axial extent of the contact surface of the inner seal ( 6 ) which this in the axial region of the pipe end ( 2 ) on the guide ring ( 4 ) takes an axially shorter dimension than the entire axial width over which the guide ring ( 4 ) extends in the axial region of the pipe end ( 2 ),
• c) the inner seal ( 6 ) arranged in the axial region of the pipe end ( 2 ) is by means of an axially extending axial extension ( 11 ) with an axially outer sealing ring ( 10 ) via the radially running end wall ( 3 ) of the concrete pipe ( 1 ) , which seals the gap ( 12 ) between the guide ring ( 4 ) and the insertion tube ( 1 '), firmly connected.

2. Pipe connection according to claim 1, characterized in that at least one of the elasto meren parts of the sealing element ( 7 ), such as inner seal ( 6 ), axial extension ( 11 ) or outer sealing ring ( 10 ), by gluing or vulcanization on the guide ring ( 4 ) is attached. 3. Pipe connection according to claims 1 or 2, characterized in that at least one of the elastomeric parts of the sealing element ( 7 ), preferably before the outer sealing ring ( 10 ), by means of a clamping ring on the guide ring ( 4 ) is attached. 4. Pipe connection according to claims 1 to 3, characterized in that the axial extension ( 11 ) has an axial stiffness, the shear-proof position of the outer sealing ring ( 10 ) during the installation of the insertion tube ( 1 ') and with external water pressure load What guaranteed. 5. Pipe connection according to claims 1 to 4, characterized in that one of the axial extension ( 11 ) outgoing flange ( 8 ) in the between the two concrete pipes ( 1 and 1 ') located radial butt joint ( 9 ).