RU130034U1 - PIPELINE REPAIR COUPLING - Google Patents

Abstract

1. A coupling for repairing a pipeline containing two half-shells, characterized in that each half-shell is made of three layers, the inner layer made of carbon fiber and the outer layers of fiberglass. 2. The pipe repair sleeve according to claim 1, characterized in that the edges of the half shells are overlapped. The pipe repair sleeve according to claim 1, characterized in that the edges of the half shells are bolted.

Description

The utility model relates to pipeline transport and can be used in the repair of operating pipelines with defects, mainly crack-like, in particular, operating gas pipelines, oil pipelines.

A known analogue is a coupling for repairing a pipeline containing two half-shells (see, for example, the description of the invention to the RF patent No. 2191317, IPC F16L 55/18, publication date 10/20/2002).

A disadvantage of the known coupling is the need to connect the half shells by welding, which is a laborious process and is not always applicable due to fire hazard.

The closest analogue to the welded coupling for repairing the pipeline contains two half-shells (see, for example, the description of the invention to RF patent No. 2285192, IPC F16L 55/18, publication date 10/10/2006).

The disadvantage of the closest analogue is the need to connect the half shells by welding, which is a time-consuming process and is not always applicable due to fire hazard.

The technical result is expressed in reducing fire hazard and improving the manufacturability of the pipeline repair process.

The essence of the claimed coupling for repairing a pipeline is characterized by the fact that it contains two half-shells and differs from the closest analogue in that each half-shell is made of three layers, with the inner layer made of carbon fiber and the outer layers of fiberglass.

The essence of the claimed coupling for the repair of the pipeline is illustrated by drawings, which show the following.

Figure 1 is a side view of the coupling located on the pipeline;

figure 2 is a view of the coupling with a bolted connection of the half shells on the side.

The coupling for repairing the pipeline contains two half-shells 1, 2 interconnected along the longitudinal sections by gluing (Fig. 1) or bolted joints 5 (Fig. 2). Each half-shell 1, 2 is made three-layer, with the inner layer made of carbon fiber, and the outer layers of fiberglass.

The half-shells 1, 2 are made in the form of a half-cylinder (Fig. 1, 2).

The thicknesses of the carbon fiber and fiberglass layers are generally not equal. In the particular case of half shells 1, 2, the thickness of the layers of carbon fiber reinforced plastic and fiberglass can be the same. Taking into account the known properties of fiberglass and carbon fiber as materials, it is possible to obtain half shells 1, 2 with the required strength characteristics for specific pipelines 4 with given wall thicknesses, internal limit values of fluid pressures, taking into account the nature and magnitude of the forces of external influences on the pipeline 4 (Fig. .12).

The lateral edges of both half shells 1, 2 can be made with a bevel angle of about 30 ° or less. Preferably, 5 ° to 15 °.

It is possible to use half shells 1, 2 with additional layers of carbon fiber reinforced plastic and fiberglass, i.e. with the total number of layers of each half shell 1, 2 more than three.

The coupling for repair of the pipeline is used as follows.

Previously, taking into account the nature of the defect of the pipeline 4 detected by known methods, half-shells of the required length and internal radius are prepared. Reduce the product pressure in the pipeline 4. Remove soil around the pipeline 4, revealing the damaged area. Remove the anti-corrosion coating from the pipeline 4 and clean the surface of the pipeline 4. Prepare the required amount of composite material 3 based on epoxy resin. The cleaned surface of the pipeline 4 is coated with a composite material 3 based on epoxy resin. They cover the repaired section of the pipeline 4 with half-shells 1 2. It is preferable to first set the half-shell 2 as the lower one, and then the half-shell 1 as the upper one. When joining half-shells 1, 2 with an overlap, the epoxy resin-based composite material 3 is also applied to the sides of the side edges of the half-shells 1, 2 facing each other. Compress the half shells 1, 2 by crimping them on the pipe 4 with external devices, for example, contractible metal tape couplings with a bolted connection to the ends of the clutch tape. In this case, part of the composite material 3 is squeezed out from under the half-shells 1, 2 (Fig. 1). Surplus composite material can be removed from the surface of the pipe 4 outside the places of pressing the half shells 1, 2. Compression of the half shells 1, 2 is carried out for the time of hardening of the composite material 3 based on epoxy resin. After the curing of the epoxy resin-based composite material 3, the external devices are removed.

To enhance the strength of the coupling, the connection of the half shells 1, 2 can be performed with additional elements pre-installed on the edges of the longitudinal sides, to enable bolted connections 5 (figure 2). At the work site, half-shells 1, 2 of the coupling are connected to each other by the longitudinal sides of the bolted joints 5.

Claims (3)

1. The coupling for repair of the pipeline, containing two half-shells, characterized in that each half-shell is made of three-layer, and the inner layer is made of carbon fiber, and the outer layers of fiberglass. 2. The pipe repair sleeve according to claim 1, characterized in that the edges of the half shells are overlapped. 3. The coupling for repair of the pipeline according to claim 1, characterized in that the edges of the half shells are connected by bolted connections.

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