DE3209358C1 - Socket pipe connection for pipes made of plastics - Google Patents

Abstract

A pipe socket (1) on a plastic pipe has a circumferential flexible zone with an elastic ring (5), which is placed on externally, and a covering compression ring (6), located over the latter. This produces circumferential sealing between the pipe socket (1) and a tip end (2) which is to be inserted, without any exposed sealing ring, as a result of which assembly is simplified and detrimental effects on the sealing ring caused by corrosive media are prevented. <IMAGE>

Description

Claims: 1. Socket pipe connection for pipes made of plastics, Consists of a pipe socket, a spigot to be inserted and a circumferential one Sealing between the two parts, d a d u r c h marked that the seal by a circumferential, flexible zone of the pipe socket (1) with an externally attached, elastic ring (5) and an overlying cover pressure ring (6) is formed.

2. socket pipe connection according to claim 1, characterized in that that the circumferential, flexible zone by forming an outer bead (3) on the Pipe socket (1) for producing a thin, inner web (4) with both sides of the Bead (3) circumferential retaining webs (7) for the cover pressure ring (6) is formed.

The invention relates to a socket pipe connection according to the Preamble of claim 1.

Compounds of this type are well known.

This is done in the socket, in many cases in one at the socket base molded bead, a flexible sealing ring inserted. That at the construction site The cut end of the spigot is first chamfered in order to reduce the frictional resistance. A lubricant is then applied to provide the necessary insertion forces to reduce. Nevertheless, because of the high frictional resistance between the sealing ring and to exert considerable insertion forces on the spigot. As an example of one Pipe connection with a circumferential bead on the socket base to accommodate the flexible Sealing ring may be a version according to CH-PS 3 87 399.

In order to avoid high frictional resistance, it has already been proposed to use sealing rings, which when inserting the spigot can move into a cavity. This is not only affecting the elasticity of the Material, but also the construction of the sealing ring. DE-OS 27 09 426 shows, for example, an air cushion between the sealing ring and the socket base. CH-PS 405837 shows an expanded sealing ring. In both cases the sealing ring can give way, which reduces the frictional forces.

A socket pipe connection for pipes made of plastics is to be created which can be installed even more easily than before. Furthermore should the contact of the sealing ring with aggressive substances flowing through the pipeline Media are prevented.

According to the invention, this is done by the feature of the Claim 1 mentioned feature.

In contrast to the known seals, there is no sealing ring more between the inner surface of the pipe socket and the outer surface of the spigot end. Rather, it presses a ring, supported by the cover pressure ring, the circumferential flexible zone of the pipe socket towards the spigot end. The very smooth inner wall of the pipe socket opposes the spigot to be pushed in with a significantly lower resistance as an internal sealing ring of any kind. Nevertheless, the flexible Zone perfectly sealing to the spigot end.

Since only the pipe material slides on each other, can on a chamfering of the spigot can be dispensed with. The lower frictional resistance allowed it is not necessary to apply a lubricant.

Nevertheless, the required insertion forces are lower than with the usual assembly up to now. The ring placed on the outside of the flexible zone comes out also not in connection with flowing medium. He can therefore neither before the assembly in its effect even in the fully assembled pipeline due to aggressive media be affected.

The circumferential, flexible zone is easiest by molding an outer, circumferential bead to produce a thin, inner web. The thickness of the bar has proven to be less than 1 mm, in a special case 1/3 mm proven. Because of the outer cover pressure ring, this results in spite of this training no weakening of the pipe socket.

The drawing shows an embodiment of the invention. It shows Fig. 1 to F i g. 3 longitudinal sections through differently designed pipe sleeves with assigned pointed ends, each left in the original state and right with a finished one Sealing element.

In a pipe socket 1, a spigot 2 is to be inserted, in which the known Chamfering can be omitted. The pipe socket 1 has a circumferential flexible zone in illustrated case in the form of an outer bead 3 and a thin, inner web 4. The thin web 4 is by an externally attached, elastic ring 5 and an overlying cover pressure ring 6 pressed slightly inward so that he sealingly rests against the spigot end 2 to be inserted. Smooth plastics slide on top of each other, which means that low insertion forces are required. The ring 5 is coming not in contact with flowing media.

Claims (1)

F i g. 1 shows a simply pushed-on cover pressure ring 6. Fig. 2 shows additional retaining webs 7 for the cover pressure ring 6. According to FIG. 3 represents the cover pressure ring 6 represents a sleeve to be pushed on in the case of a double socket.