DE1930253U - PLASTIC PIPE FOR LONGITUDINAL FORCE PIPE CONNECTIONS. - Google Patents

Description

A607 762 * 11/19/65

DR. F. EBERHARD ^{PZ 0211}

Patent attorney Essen, 18. ΝονΓ'1965

Utility model registration P 22 421 / 47f Gbm

"Plastic pipe for restrained pipe connections" Applicant: Carboplast Kunststoffwerk GmbH

The invention relates to a plastic pipe for restrained connections Pipe connections in which an expanding ring that engages in a recess in the pipe socket is attached to a retaining ring of the The spigot of the pipe to be connected sits restrained. In known embodiments of such tubes is the expansion ring that creates the frictional connection of the pipe connection is equipped with an uncovered, outer section, which enables easy removal by hand. But such a training has the disadvantage that from the human Will independently appearing pressures, which are unavoidable, especially in the case of pipes laid underground, the Press the expansion ring together and thereby cancel the frictional connection of the pipe connection.

The invention has set itself the task of a Kuaatstoffrohr to create, whose restrained pipe connections do not run the risk of an arbitrary breaking of the connection subject. According to the invention, the solution lies in the proposal to shape the plastic pipe in such a way that the pipe socket is designed in two stages that the retaining ring of the pipe in the front wide socket step and the top end pot is performed in the rear narrow sleeve step, and that the expansion ring section facing the outer space is also covered against radial pressure.

Further the plastic pipe according to the invention advantageous Features can be found in the subclaims and are explained in more detail below with reference to the drawing with two exemplary embodiments. Show it:

Fig. 1 in section a plastic pipe, the expansion ring of which is flush with the socket end, and

DR. F. EBERHARD
PATENT ADVOCATE

Fig. 2 shows a section of a plastic pipe, the section of the expansion ring facing the outside protruding from the socket end and covered by a screw ring.

According to Fig. 1, the plastic pipe is a pipe socket 1 provided, in the recess 1c of which an expansion ring 2 engages,

of

which sits on a retaining ring 4 of the pipe 3 to be connected in a longitudinally force-locking manner. The pipe socket 1 is two-stage formed and leads in its front wide socket step 8 with two annular cams 4a in annular grooves of the pipe inserted and glued to this retaining ring 4- The head section of the pipe spigot end is in the rear narrow socket step 9 led. The section facing the outside space of the expansion ring 2 is covered against radial pressure in that it is flush with the socket end 1a. the Spreader ring 2 has an annular groove 2f and a rounded collar 2g, around its to the socket recess 1c or the retaining ring 4 to keep abutting end faces sufficiently small for the purpose of reduced frictional forces, so that by means of an in the recess 2h to be used at any time band clamp 7 of Expanding ring 2 can be easily pressed together and removed, as indicated by dashed lines in the figure.

In order to avoid damaging notch effects, the relevant inner edges, in particular the edge 1e of the socket recess 1c, rounded shape. The seal itself is made possible by the elastic double-pen diene ring, which is known per se 5 causes that against the socket elbow 1f and the retaining ring 4 supports.

In the embodiment according to Figure 2, the dem Outside facing section of the expansion ring 2 against the socket end 1 a and is through a into the socket end 1 a screw-in screw ring that retains its shape against radial pressure

DR. F. EBERHARD ³

PATENT ADVOCATE

10 covered, with which it ends flush with 2e. There to solve To unscrew the screw ring 10 of the pipe connection and the expansion ring 2 can then be pushed off without being compressed, its socket recess 1c and Retaining ring 4 adjacent end faces formed smooth. To avoid contamination of the cavity between expansion ring 2 and pipe 3 To avoid this, it is advisable to put on a sealing bandage, which is indicated by a dashed curve with no figures should be. In addition, the plastic pipe is also as far as it is is not shown below the break line - designed in the same way as the pipe according to Figure 1.

The pipe connection according to the invention represents a clamping connection which, despite a simple structure and more convenient Handling is characterized by a high level of reliability.

Protection claims:

Claims (4)

| _β η «υ U ι DR. F. EBERHARD _4_ PATENT ADVOCATE Protection claims: . Plastic pipe for longitudinal pipe connections, in which one engages in a recess in the pipe socket Spreader ring rests with longitudinal force on a retaining ring of the spigot end of the pipe to be connected, characterized in that the pipe socket (i) is designed in two stages with a guide for the retaining ring (4) in the front, wide sleeve stage (8) and of the spigot end head in the rear narrow socket step (9), and that also the expansion ring section facing the outer space is covered against radial pressure. 2. Plastic pipe according to claim!, Characterized in that that the expansion ring (2) protrudes against the socket end (1a) and can be rotated into the socket end (1a), against radial pressure dimensionally stable screw ring (10 ') is covered. 3. Plastic pipe according to claim 1, characterized in that that the expansion ring (2) with the socket end (la) ends flush or slightly sunk and a recess (2h). having. 4. Plastic pipe according to claim 3, characterized in that that the expanding ring (2) has an annular groove (2f) and a rounded collar (2g), which at the socket recess (ic) or the retaining ring (4) are in contact Reduce the face of the expansion ring (2). {β '* ® * » tfefciässs C @ 5isfceifeas $ esa $ s" ü &<issisp $ SsI <3; s «fess« lagei «« ^ sss «« ds »« sa «Sw 4 Js ^ Ä ^ «δ« Μ W ^P «Utst # .v) g! Feia 0ii3 _S wTJcii!« Fl «asififJBsisa Μ3ε & λ dsäs k> Sm im re <iteftÄ« »toi» *** ® gi & Sääaiasfed äSesssäs » wmäts. Ad ääcs «asfeia * ife -« *? «« W i Λο iSääSsfos »fiefee» 0Ä te ^ i *