RU23481U1 - INTEGRAL CONNECTION OF PIPES FROM REINFORCED THERMOPLAST - Google Patents

Description

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INTEGRAL CONNECTED PIPES FROM REINFORCED TERMONLAST

The utility model relates to pipeline transport and can be used to repair field pipelines in the oil refining and petrochemical industries.

A one-piece pipe connection with the inner lining is known, including adapter sleeves between the pipe ends, couplings (endings) in the connection zone and a vertical welded butt joint (USSR, AS No. 1737216, MKI 5 F 16 L 13/11, pr. 12.09. 89, publ. BI No. 20, 1992).

The disadvantage of this connection is the low strength, fragility due to the gluing of the adapter sleeve with the coupling.

The closest technical solution to the claimed one is an integral connection of pipes made of reinforced thermoplastic, containing a sleeve with ends, located between the end surfaces of the pipes and covering the ends with their cylindrical surfaces, as well as a sleeve covering the cylindrical surfaces of the sleeve. Fixing elements are rigidly connected to the sleeve. The sleeve is made of two parts, the ends of which are molded to the pipes, while the parts of the sleeve are welded together at the end surfaces (vertical welded butt joint). At the tip of the sleeve made thrust surfaces, mating with the locking elements (RF Patent No. 2087785, MNC 6 F 16 L 13/11, etc. 12.05.93, publ. BI No. 23, 1997) prototype.

MPK7R16b 13/11

This connection allows to increase the reliability of the welded joint and the equal strength of the connection with the pipe body, however, at the junction of the endings with the pipe, internal stress zones are observed. According to which during the operation of the pipe there is a softening of the connection of the pipe with the tips, and therefore its service life is reduced.

The objective of this utility model is to improve the permanent connection of pipes.

The technical result that will be achieved by using the claimed utility model is to increase the service life of the pipes.

The technical result is achieved by the fact that in an integral connection of pipes made of reinforced thermoplastic, we contain; we have a sleeve with endings, we embrace them; pipe ends and a welded vertical butt joint, slotted grooves are made at the end of the restored pipe, and protrusions are made on the inner surface of the enclosing endings, combined with slotted grooves of pipes.

For a more reliable connection of the tip to the pipe, annular grooves are made on the spline protrusions of the restored pipe.

The essence of the proposed technical solution lies in the constructive solution of connecting the endings with the ends of the pipes made of reinforced thermoplastic.

The execution of slotted grooves at the end of the restored pipe coinciding with the protrusions of the female ending provides a more reliable connection between them due to the heat shrinkage of the step-like surface (vertical and horizontal surfaces of the grooved grooves with similar surfaces of the grooves), i.e. After heating the tips, the inner diameter of the sleeve decreases, due to which a durable thermoplastic connection is formed at the contact point of the tip and the pipe being restored (to be repaired). which in turn leads to a sharp increase in the service life of the pipes.

The execution on the spline protrusions of the restored pipe annular grooves further increases the reliability of the connection of the pipe with the tip due to the perception of axial force.

From the analysis of scientific, technical and patent literature, the implementation of the step-like joint between the end face of the pipe being restored and the tip is not revealed, which allows us to conclude that the claimed technical solution meets the novelty criterion

The utility model is illustrated by drawings, where in FIG. 1 is a sectional view of a general view of an integral pipe connection; FIG. 2 is a section AA from FIG. 1, in FIG. 3 is a section BB of FIG. 2.

The one-piece connection contains a pipe 1, a sleeve 2 with endings 3, covering the ends of the pipes 1, and a welded vertical butt joint of reinforced thermoplastic 4. At the end of the restored (to be repaired) pipe 1, slotted grooves 5 are made, on the splined surfaces of which annular grooves 6 are cut, and on the inner surface of the female ending 3 protrusions 6 are made.

The useful model is as follows. At the end of the restored pipe 1, slotted grooves 5 are preliminarily performed, on the splined protrusions of which annular grooves 6 are cut, and on the inner surfaces of the tip 3, protrusions 7. Then, the sleeve 2 with the tip 3 is put on the pipe 1 so that the tabs 7 of the tip enter the slotted grooves 5 pipes. The ends of the pipes with bushings are butt welded according to known technology. After that, heaters are installed on the outer surfaces of the endings (or heated by any other known method) and the endings are heated with pipe ends. As a result, there is a stepwise connection of the grooves 5 with the protrusions 7 and the tip 3 is firmly connected to the end face of the restored pipe 1, the heaters with

3

the tips are removed and the integral connection of pipes from reinforced thermoplastic is ready for further operation.

For a stronger connection of the restored pipe 1 s

the tip 3 they are additionally connected along the annular grooves 6,

which allows the tip covering the restored pipe to perceive axial force. The annular grooves can be made of various shapes (for example, rectangular, triangular, semicircular, etc.).

Claims (2)

1. An integral connection of pipes made of reinforced thermoplastic, containing a sleeve with endings covering the ends of the pipes, and a welded vertical butt joint, characterized in that slotted grooves are made at the end of the pipe being restored, and protrusions combined with slotted grooves on the inner surface of the ending end thereof. pipes. 2. The one-piece connection according to claim 1, characterized in that annular grooves are cut on the spline protrusions of the restored pipe.