RU2378560C1 - Sag pipe coupling - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention is related to devices for repair of pipeline sections, including submerged crossings, without interruption in product transit. Coupling consists of two half couplings and nozzles for supply of composite compound. Upper half coupling is equipped with indicator nozzles, fastening brackets, mechanism for control of vertical position of reservoir. Mechanism consists of basket for installation of reservoir with composite compound, barrel, ring, hinged nut, support, stop bush, ball valve, short coupling, lock-nut, coupling cover, needle. Lower half coupling comprises positioning pins, which join upper and lower half couplings, dog bolts, mount bolts, fastening chain, yokes, rubber seals. Reservoir for composite compound consists of balloon and inbuilt heat removal system, including radiator, bus bars, supports. Coupling is installed onto repaired section of pipeline, filled with composite compound, matured until complete hardening.

EFFECT: strengthening of corroded or damaged section of pipeline, increased reliability of pipeline operation.

2 cl, 8 dwg

Description

The invention relates to the construction and is used in the repair of pipelines for various purposes, including underwater crossings and makes it possible to strengthen a corroded or otherwise damaged section of the pipeline without stopping the pumping of the product.

Most effectively, the present invention can be used for pipelines transporting any liquid product, for example oil, oil products, gaseous products.

As a material in the manufacture of pipes for pipelines, steel is used. During the operation of pipelines, the surface is exposed to corrosion and mechanical damage.

The “intelligent” diagnostic tools used on the main pipelines make it possible to detect defects of various types in the linear part of the pipeline.

As a prototype, a device for repairing a pipeline (GB 2210134 A, published on 06/01/1989) was selected, consisting of a cylindrical steel coupling with nozzles installed on defective sections of the pipeline.

The coupling consists of two cylindrical coupling halves - lower and upper, which are joined together by welds when mounting the coupling to the pipe being repaired symmetrically with respect to the defect, completely covering it. The coupling halves are butt welded with longitudinal seams with preliminary cutting of the edges. The inner diameter of the coupling exceeds the outer diameter of the pipeline by an amount sufficient to form an annular gap between them to compensate for the ovality of the pipe and the coupling. The tolerance on the size of the annular gap allows repairing pipelines with geometry defects in the cross section and bending of the longitudinal axis. In the lower coupling half is an inlet steel pipe, designed to connect a flexible hose to it, through which composite material is fed. In the upper coupling half is the outlet steel pipe. The ends of the coupling are filled with quick-setting sealant. The resulting volume between the pipe and the coupling through the inlet pipe in the lower coupling half is filled with a composite material based on epoxy resin, hardening to the required strength within 24 hours. The composite material adheres to the pipe and the coupling, strengthens the damaged part of the pipeline and provides a sufficiently effective discharge of the defective pipe. In the coupling there are control openings designed to release air and control the level of the composite material during pouring. As the coupling fills with composite material, bolts are screwed into the control holes. In addition, in both coupling halves there are threaded holes into which mounting bolts are screwed, designed to adjust the clearance between the coupling and the pipe and perform the function of supports when installing the coupling on the pipeline.

In addition to a coupling with a welded joint of the coupling halves, a coupling with a flange connection of the coupling halves can be used, in this case the coupling of the coupling halves is carried out using studs that tighten the flanges.

The disadvantages of the known device are the following:

coupling halves are fastened with the power of welding, which makes it very difficult to install them when repairing pipelines in underwater passages;

sealing the ends with a special sealant, which freezes in conditions of work under water and at low temperatures, not having time to completely seal the ends;

high cost of construction.

The objective of the present invention is to provide such a device that could provide the resource and durability of the pipeline having a defective section of at least the service life of the pipeline itself with damage for the period of operation and reducing the installation time of the structure on the defective section.

The objective of the invention is achieved by the fact that when repairing a defective area, a cylindrical coupling is installed, consisting of two coupling halves and nozzles for supplying a composite composition, the upper coupling coupling is equipped with indicator nozzles, mounting brackets, a mechanism for regulating the vertical position of the container, including a basket for installing the container with composite composition, barrel, ring, swivel nut, support, locking sleeve, ball valve, short coupling, lock nut, coupling cover, needle, lower coupling half, incl. This includes the following structural elements: locating pins connecting the upper and lower coupling halves, hinged bolts, locating bolts, fixing chain, clamps, rubber seals. The container for the composite composition consists of a cylinder and a heat sink system built into it, including a radiator, tires and supports.

figure 1 - General view of the coupling;

figure 2 is an end view of the coupling;

figure 3 - design of the basket;

figure 4 - lower coupling half;

5 is a container for a composite composition;

6 is a booster pump;

7 is a mechanism for regulating the position of the tank.

On Fig presents a table that shows the amount of composite composition required for each size of the coupling.

The proposed coupling consists of two coupling halves, an upper 1 and a lower 2. On the upper coupling 1, nozzles 5 are installed with mechanisms for regulating the vertical position of a container with a composite composition. A basket 11 is mounted on the nozzle by a bolted connection, representing a welded structure consisting of uprights 12, a belt 13 welded to a disk 14, into which a container with a composite composition 10 having a higher density and specific gravity than the environment through which the pipeline passes .

On the upper coupling half 1 there are additional nozzles 6, which are indicators of visual control of the space filling by the composite between the outer surface of the defective section of the pipeline and the inner surface of the coupling, as well as for further control of the mechanical properties of the composite during further operation of the pipeline.

The lower coupling half 2 is equipped with mounting pins 3, which serve to ensure the accuracy of the connection of two coupling halves 1 and 2 when installing the coupling on a damaged section of the pipeline.

The transportation of the lower and upper coupling halves is carried out using the handles 36.

To ensure a guaranteed gap between the outer surface of the defective section of the pipeline and the inner surface of the coupling in a given range, taking into account the compensation of the ellipse of the pipe being repaired, there are mounting bolts 4 for adjusting the gap in the section being repaired.

Four corners 7 are welded to the lower coupling half 2 at an angle to the longitudinal axis of the coupling with slots for adjusting the tension of the chain 15 and holes for the carabiner.

At the ends of the coupling half welded clamps 16 for rubber mechanical seals 17, which are glued to the clamps 16.

The fastening of two coupling halves is carried out with folding bolts 8.

A mechanism 9 for regulating the vertical position of the container is installed on the nozzle 5 for filling with the composite compound, which can change the angle of rotation up to 30 ° in any direction, which ensures filling the space between the outer surface of the defective part of the pipeline and the inner surface of the coupling with the composite compound in the repaired areas located to the position close to vertical.

The container 10 for the composite composition is a cylinder 18 with a heat sink system - radiator 19, tires 20, 21 and supports (legs) 22. To create a pressure that accelerates the filling of the space between the outer surface of the defective section of the pipeline and the inner surface of the coupling with the composite compound, a manual a booster pump, consisting of a bulb 23, inlet 24 and outlet 25 valves.

The composite composition comes from the tank into the mechanism for regulating the vertical position of the tank with the composite composition.

The mechanism 9 for regulating the vertical position of the container includes a barrel, a ring 27, a hinge nut 28, a support 29, a locking sleeve 30, a ball valve 31, a short coupling 32, a lock nut 33, a coupling cover 34 and a needle 35.

Capacity 10 is inserted into the basket 11 bottom up. The cork is pierced by a needle 35, abutting against the ring 27. The composite composition begins to be supplied after opening the ball valve 31 into the coupling space, displacing the substance from which the environment consists.

For each type of coupling of the VN-1 duking coupling, the table (Fig. 8) shows the amount of composite composition needed to fill the space between the outer surface of the pipeline being repaired and the inner surface of the coupling.

The work of the invention is as follows.

The soil through which the repair section of the pipeline passes is selected, freeing the surface of the pipe with defects, then it is cleaned. The lower half-coupling 2 is brought under the pipe. The upper half-coupling 1 is fixed to the lower half-coupling 2 by means of the fixing chain 15 and hold it until the half-coupling 1 and 2 are fastened with the help of fixing pins 3. Using the fixing bolts 4, the required clearance between the external the surface of the defective section of the pipeline and the inner surface of the coupling. In the basket 11, mounted on the nozzles 5 (the number of nozzles depends on the length of the defective section of the pipeline) are inserted containers with a composite composition 10, the covers of which are pierced by a needle 35. The containers have a heat sink that prevents the composite composition from overheating due to the chemical reaction after mixing the components . The composite composition begins to enter the mechanism for regulating the vertical position of the container with the composite composition. To enter the composite composition into the volume formed by the outer surface of the defective section of the pipeline and the inner surface of the sleeve, ball valves 31 are opened. Depending on the environment in which the repair section of the pipeline is located, a more rapid supply of the composite composition may be necessary. For example, when working under water in the winter season or in the North, an additional pumping device is installed, which can be equipped with either a manual drive or an electric powered nuclear power source. Indicator pipes 6 show the end of the process of filling the space with composite between the inner surface of the coupling and the outer surface of the repair section of the pipeline. The second purpose of the indicator tubes 6 is the analysis of the mechanical characteristics of the composite material during the further operation of the pipeline (they are removed at regular intervals).

Claims (2)

1. Dukerny coupling, consisting of two coupling halves and nozzles for supplying a composite composition, characterized in that the upper coupling coupling is equipped with indicator pipes, mounting brackets, a mechanism for regulating the vertical position of the container, including a basket for installing containers with a composite composition, a barrel, a ring, swivel nut, support, locking sleeve, ball valve, short coupling, lock nut, coupling cover, needle, lower coupling half, including the following structural elements: mounting pins connecting the upper lower and lower coupling halves, hinged bolts, installation bolts, fixing chain, clamps, rubber seals. 2. The coupling according to claim 1, characterized in that the container for the composite composition consists of a cylinder and a heat sink system built into it, including a radiator, tires and supports.

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