AT396011B - Pipe connection, in particular for steel-reinforced concrete pipes - Google Patents

Abstract

A pipe connection having a sliding ring seal 4 which is arranged in the excess travel region of the pipe ends which have been pushed into one another and consist of an elastic material, in which case an excess-travel ring 6 may be attached to one pipe 1; 2. In order to ensure reliable sealing over a long period, the invention provides that those parts such as the sliding ring seal 4 and excess-travel ring 6 which are held on the pipes 1, 2 connected to one another are connected to the pipe 1, 2 which holds the respective part 6; 4 via a permanently elastic intermediate layer 10, 11. <IMAGE>

Description

AT396 011B

The invention relates to a pipe connection, in particular for reinforced concrete pipes with a slide ring seal made of an elastic material and arranged in a push-over area of the plug-in pipe ends, wherein a push-over ring is attached to a pipe.

Such a pipe connection was known from AT-PS 382 224. In this known connection, a slip ring is embedded in a gradation of the outer jacket of the one tube and connected to the tube with claws protruding into the wall of the tube. The mechanical seal arranged on the second tube of the connection is inserted in a circumferential groove and is held only by elastic pressure of the seal on the groove base.

In these known pipe connections, it has been found that there can be problems with regard to the tightness of the connection, which are caused in particular by the fact that, due to the different coefficients of thermal expansion between the pipes made of concrete and the metallic slip ring, gaps are formed . Additional sealing measures, such as. B. the application of a sealant to the transition areas between the concrete pipe and the slip ring were only imperfect, especially with regard to long-term sealing.

The aim of the invention is to avoid these disadvantages and to propose a connection of the type mentioned at the outset, which is distinguished by a high degree of tightness.

According to the invention this is achieved in that the slide ring and possibly the mechanical seal, which are held on the interconnected pipes, are connected to the pipe holding the respective part via a permanently elastic intermediate layer.

This elastic intermediate layer prevents the formation of gaps between the thrust ring and the pipe holding it, since the movements of these parts which are due to different coefficients of thermal expansion can be absorbed by the elastic intermediate layer.

A further improvement in the tightness of the pipe connection can be achieved by connecting the mechanical seal to the pipe holding it via an elastic intermediate layer. In this way, the disadvantage can be avoided that when the pipes to be connected are pushed into one another, there is a local upturning of the mechanical seal due to the friction between the inner wall of the slide ring and the mechanical seal which is essentially triangular in cross section. This development of the invention is particularly advantageous in the case of pipes with a large diameter.

According to a further feature of the invention it can be provided that the intermediate layer is connected with an adhesive to the parts adjacent to it.

In this way, a full-surface connection of the intermediate layer with the parts adjacent to it is made possible. Both hardening and permanently elastic adhesives can be used.

According to another feature of the invention, it can be provided that the intermediate layer is connected to the parts adjoining it by vulcanization.

These measures result in a particularly secure and tight connection between the elastic intermediate layer and the parts adjacent to it

Furthermore, it can also be provided that the intermediate layer is formed by a layer of an elastic adhesive

This results in a particularly simple construction of the connection according to the invention, in which at the same time a secure connection of the corresponding parts is ensured

The invention will now be explained in more detail with reference to the drawing, the figure showing an inventive connection of two pipes (1) and (2)

In this case, a push ring (6) is inserted on the outside of the tube (1) and is held by a claw (5) inserted into the wall of the tube (1). A permanently elastic intermediate layer (10) is inserted between the inner wall of the push ring (6) and the outside of the tube (1), which can also extend over the end face of the push ring (6).

The tube (2) has a shoulder (3) with a smaller diameter, which can be inserted into the push ring (6). This approach (3) holds an almost triangular mechanical seal (4) in the undeformed state. A permanently elastic intermediate layer (11), which is connected to these two parts, can also be arranged between the mechanical seal (4) and the lateral surface of the extension (3)

The intermediate layers can be formed by foils or thin plates made of plastic, rubber or the like. The connections of these intermediate layers (10) or (11) with the tube (1) and the slip ring (6) or with the tube (2) are preferably area-acting connections, such as bonds or z. B. compounds produced by vulcanization.

According to a preferred embodiment of the invention, the intermediate layers (10) or (11) can also be formed by layers of permanently elastic adhesives which simultaneously form the corresponding parts, such as the tube (1) with the push-over ring (6) or the shoulder (3) of the tube (2) with the mechanical seal (4).

Between the butt abutting end faces of the pipes (1) and (2) a ring (7) made of homogeneous wood is inserted, which is shielded from the inside of the pipe by a permanently elastic joint seal (8). -2-

Claims (3)

AT 396 011 B PATENT CLAIMS 1. Pipe connection, in particular for reinforced concrete pipes, with a slide ring seal made of an elastic material, which is arranged in a push-over area of the pipe ends which are inserted into one another, wherein a push-on ring is fastened to a pipe, characterized in that the Slide ring (6) and optionally the mechanical seal (4), which are held on the interconnected pipes (1, 2), via a permanently elastic intermediate layer (10; 11) with the pipe (1; 2) are connected. 2. Pipe connection according to claim 1, characterized in that the elastic intermediate layer (10; 11) is connected with an adhesive to the parts lying against it (1, 6; 2, 4), in particular by vulcanization 3. Pipe connection according to claim 1, characterized in that the elastic intermediate layer (10; 11) is formed by a layer of an elastic adhesive Hiezu 1 sheet drawing P -3-