RU172205U1 - COUPLING FOR REPAIR OF UNDERWATER PIPELINE - Google Patents

Abstract

The utility model relates to pipeline transport and is intended for repair work on underwater crossings of trunk pipelines without the use of welding. The coupling consists of two half-couplings having longitudinal flanges, means of fastening and tightening the half-couplings between each other, sealing units, including stop flanges, elastic gaskets, annular locking inserts, an annular ring. Two protruding cones are made on the outer surface of the annular locking inserts, and the annular clips are made with two conical grooves. When assembling the assembly, the outer surfaces of the cones of the locking inserts enter into interaction with the reciprocal conical grooves of the annular clips. Sealing elements are located between the stop flange and the annular ring. The proposed design of the coupling is reliable, contains a minimum number of components and parts, the possibility of its reusable use without welding, the simplicity and convenience of its installation on the defective pipe section.

Description

The utility model relates to pipeline transport and is intended for repair work on underwater crossings of trunk pipelines without the use of welding.

A known clutch for repair of an undersea pipeline, consisting of two half-couplings having longitudinal flanges, and means for fastening and tightening the half-couplings together, from the ends of the coupling is equipped with sealing units (patent for utility model of the Russian Federation 45011, published on 10.04.2005).

The disadvantages of the analogue are the relatively low strength of fastening of the coupling on the repaired section of the pipeline.

A device is known for sealing a pipe for repair of an underwater pipeline, adopted as a prototype consisting of two parts with longitudinal flanges, containing sealing units, each of which includes spring-sealed annular locking inserts, two elastic gaskets, locking inserts and persistent flanges (EP 2489911, published 08/22/2012). The known design contains a significant number of individual parts, including springs. The design is difficult to assemble and use, the area of the crimped surface of the repaired pipeline is not sufficient to ensure strong engagement of the coupling with the pipeline.

The task the utility model is aimed at is the development of a simple and reliable device designed for the rapid repair of underwater crossings of gas pipelines without the use of welding, which provides strong engagement of the coupling with the repaired section, if there is sufficient sealing.

The technical result is to increase the strength of the fastening of the coupling on the repaired section of the pipeline.

The problem is solved due to the design of the coupling, consisting of two half-couplings having longitudinal flanges, means of fastening and tightening the half-couplings between each other, sealing units, including stop flanges, elastic gaskets, ring locking inserts, ring clips, according to the utility model on the outer surface of each ring two protruding cones are made of the locking insert, and each annular ring is made with two conical grooves, while during assembly of the sealing assembly, the outer surfaces of the cones are The bearing inserts interact with the mating conical grooves of the ring cages, and the sealing elements are located between the stop flange and the ring cage.

Between the features of the proposed utility model and the technical result, there is the following causal relationship.

The implementation of the coupling with sealing units, consisting of a minimum number of parts and the proposed form of their implementation, provide reliable pressing of the coupling half to the pipe with the formation of a strong and thus tight connection.

The essence of the utility model is illustrated by drawings:

in FIG. 1. shows the coupling, a General view;

in FIG. 2 - section sealing unit;

in FIG. 3 shows an annular locking insert;

in FIG. 4 - ring clip.

The coupling consists of two detachable coupling halves 1 and 2 (Fig. 1), made in the form of half cylinders with longitudinal flanges 3 and 4, means of fastening and tightening the coupling halves between each other 5, including studs with nuts passing through holes made in the longitudinal flanges 3 and 4. In the inner part of each coupling half 1 and 2 place the nodes of the sealing 6 (Fig. 2). Each of the sealing nodes 6 consists of an end stop flange 7 (Fig. 1, 2), in which holes are made for the passage of the pressure pins 8 (Fig. 1, 2), elastic seals 9 (Fig. 2), which carry out the sealing of the repaired area the pipeline. The sealing unit 6 also includes an annular locking insert 10 (Fig. 2, 3), on the outer surface of which there are two protruding cones 11 (Fig. 3), annular rings 12, in the inner part of which the conical grooves 13. All parts of the sealing unit are made detachable, consisting of at least two parts. When assembling the sealing unit 6, the outer surfaces of the protruding cones 11 of the locking inserts 10 interact with the counter conical grooves 13 of the annular rings 12. To fix the locking insert 10 from longitudinal movement, stops 14 are made inside each coupling half 1 and 2. To prevent the coupling halves 1 and 2 from being divided between themselves during installation on longitudinal flanges 3, 4, hinges 15 are made on one side of the coupling (Fig. 1), which are mounted at the top when mounting the coupling.

In the above-water position, before installing the coupling on the inner surfaces of the coupling halves 1, 2, grease is applied, then the sealing units are installed 6. The coupling is installed as follows: when the coupling is closed, the coupling is lowered under water, its placement is centered over the cleaned repair section of the pipeline, using hydraulic cylinders (not shown) open the coupling, point to the repaired section of the pipeline and close around the pipeline. Next, tighten the coupling body along the longitudinal flanges 3 and 4 by means of fastening 5. After the final tightening of all the studs on the longitudinal flanges 3 and 4, the coupling is strengthened and sealed from its ends by sequentially tightening the clamping studs 8 on the thrust flange 7. The force from the thrust flange 7 is transmitted through the seals 9 to an annular ferrule 12, which, with its conical grooves 13, presses the locking insert 10 to the area to be repaired, firmly securing the damaged pipe of the main pipelines with simultaneous sealing with seals 9. To improve sealing, two or more elastic seals 9 can be used.

The advantage of the proposed design of the coupling is the simplification of the design, the reliability of its operation in connection with the minimum number of components and parts, the possibility of its reusable use for repair with the possibility of dismantling and reinstalling it on the underwater crossings of the main pipelines without cutting the pipeline without welding, as well as simplicity and ease of installation on a defective pipe section.

Claims (1)

A coupling for repair of a subsea pipeline, consisting of two half-couplings having longitudinal flanges, means of fastening and tightening the half-couplings between each other, sealing units, including stop flanges, elastic seals, ring locking inserts, ring clips, characterized in that on the outer surface of each ring locking two protruding cones are made of the insert, and each annular ring is made with two conical grooves, while during assembly of the sealing assembly the outer surfaces of the cones of the locking inserts go into engagement with the mating conical annular yokes grooves and sealing elements are arranged between the thrust flange and the annular yoke.

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