DE20212414U1 - Method for connecting plastic pipes and tubes has the widened end of one pipe with a stepped outer profile to hold a sealing ring which is secured by a clip fastening retaining ring - Google Patents

Abstract

A method for connecting plastic pipes and tubes has a widened end of one pipe into which is pushed the plain end of the connecting pipe. The widened end has an outer stepped profile (5) to hold a sealing ring (4). The seal is secured by a retaining ring (7) which is clipped over the profile without requiring any additional fasteners. The pipes are made via plastic injection moulding and require no post moulding work.

Description

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&bull;&igr; I .'* PATENTA &ngr; w Ä L &tgr;&egr; .:. D-3*36390lftersloh, Vennstraße 9 Telephone (0 52 41) 1 30 54 Fax (0 52 41) 129 61 Dipl.-Ing. Gustav Meldau Dipl. Phys. Dr. Hans-Jochen Strauss Date: 12.08.2002 Dipl.-Ing. Hubert Flötotto Our reference: C0988 hF

CKW Company for Plastics Processing mbH Am Tomlaich 1

99887 Catterfeld / Thuringia

Connector for plastic pipes

The invention relates to a connector for plastic pipes with an end widened to accommodate a pipe socket, in which a circumferential groove for an annular seal is embedded.

Connecting pieces for plastic pipes are known from the state of the art, such as angle pieces, Y pieces, cross pieces or the like, which have a flared end. The connecting pipe is inserted into the flared end, with a circumferential groove in the area of the flared end being inserted to seal it, in which a ring seal is located. The introduction of the groove using a folding mandrel in the injection molding process is very costly, and the subsequent milling of the groove in the flared area of the pipe results in unavoidable dimensional differences.

A connecting piece manufactured in this way is therefore complex to manufacture, since an appropriate tool arrangement must be kept in stock, especially for the introduction of a groove.

It is therefore the object of the invention to further develop a connecting piece for plastic pipes in view of the prior art which overcomes the disadvantages described.

This object is achieved according to the invention in that a stepped support with a wall for enclosing the ring seal is formed on the widened end, and a collar ring works together with the wall to clamp the sealing ring. Due to this design, the entire connecting piece can be manufactured as such with injection molding tools without having to arrange grooves using a folding mandrel. Because of the stepped support, on which a surrounding wall for the ring seal is formed, the connecting piece can be manufactured as an injection molded part, so that hardly any rejects are produced due to the exact dimensional compliance.

The ring seal is also easy and simple to insert. After inserting the ring, the union ring is first pushed onto the pipe socket end to be connected, and the pipe socket end is then inserted into the expanded area. The clamp connection is then made with the union ring which is pressed onto the wall, so that the sealing connection between the two pipe ends is created.

In an advantageous development of the invention, the wall and the corresponding coupling ring have a conicity. The coupling ring itself has an upper collar edge covering the ring seal, as well as a lower collar edge which engages behind the stepped support to clamp the coupling ring. Due to this design, it is achieved that the coupling ring can perform a clamping hold, since the lower collar edge covers the

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stepped support. The upper edge of the collar holds the seal on the stepped support.

An embodiment of the invention is explained in more detail with reference to the single figure.

The single figure shows, in a sectional side view, preferably an end region of an angle connector with an inserted connecting pipe socket.

The figure shows an end region of the connector 1 for plastic pipes with an end 3 which is widened to accommodate a pipe socket 2 and in which an annular seal 4 is embedded. According to the invention, a stepped support 5 with a wall 6 for enclosing the annular seal 4 is formed on the widened end 3, with a collar ring 7 cooperating with the wall 6 for clamping the sealing ring 5.

The wall 6 and the corresponding union ring 7 have a conicity. As can be seen from the sectional view of the single figure, the union ring 7 has an upper collar edge 8 covering the ring seal 4 and a lower collar edge 9 which engages behind the stepped support 5 to clamp the union ring 7. It goes without saying that with regard to the assembly of the two parts, the end area of the connecting piece 1 and the pipe socket 2, the ring seal 4 is first pressed onto the stepped support 5, which in turn is enclosed by the wall 6. Before the pipe socket 2 is inserted into the widened end 3, the union ring 7 is first pushed onto the pipe socket 2, wherein after inserting the pipe socket 2 into the widened end 3, the union ring 7 is pressed onto the wall 6 in such a way that the lower collar edge 9 in particular snaps into place below the stepped support 5, so that the collar edge 8 covers the ring seal 4 from above.

Claims (3)

1. A connecting piece for plastic pipes with an end which is widened to receive a pipe socket and in which a circumferential groove for an annular seal is let in, characterized in that a stepped support ( 5 ) with a wall ( 6 ) for enclosing the annular seal ( 4 ) is formed on the widened end ( 3 ), and a collar ring ( 7 ) cooperates with the wall ( 6 ) for clamping the sealing ring ( 4 ). 2. Connecting piece according to claim 1, characterized in that the wall ( 6 ) and the corresponding coupling ring ( 7 ) have a conicity. 3. Connecting piece according to claim 2, characterized in that the coupling ring ( 7 ) has an upper collar edge ( 8 ) covering the ring seal ( 4 ) and a lower collar edge ( 9 ) which engages behind the stepped support ( 5 ) for clamping the coupling ring ( 7 ).