RU2789821C1 - Method for repairing fiberglass pipes - Google Patents

Abstract

FIELD: pipeline transport.

SUBSTANCE: invention relates to the field of pipeline transport and can be used in the construction and repair of pipelines made of fiberglass materials. A method for repairing fiberglass pipes includes installing a bandage on the outer surface of a defective fiberglass pipeline. Two segments with internal end grooves at the ends are used as a bandage. After installing the segments, they are fastened together. In the process of bonding, a heat-insulating gasket is installed between the segments and the fiberglass pipeline. Sealing elements are installed along the ends of the fastened segments. Behind the sealing elements, prefabricated pushers are installed and fastened together. After fastening the prefabricated pushers, they are axially displaced towards the ends of the fastened segments with the possibility of sealing elements resting against the inner end grooves and compression, and subsequent fixation from further axial displacement.

EFFECT: proposed method improves the efficiency of repairing fiberglass pipes at any ambient temperature, promptly eliminates the leakage of the pumped liquid, reduces the amount of earthworks and optimizes the cost of repair work.

1 cl, 5 dwg

Description

The invention relates to the field of pipeline transport and can be used in the construction and repair of pipelines made of fiberglass materials.

A known method of repairing a fiberglass pipeline (patent RU No. 2193715, IPC F16L 1/028, 47/08, publ. 11/27/2002), including the removal of a defective area, the manufacture of a repair area in the form of a metal pipe with sealing elements in the grooves and the calibration of internal pipeline channels from the side of the defective section under the outer diameter of the metal pipe. It is used to repair fiberglass pipelines with high pressure and tightness requirements. In the known method, the pipeline with a defective section is first excavated, the defective section is removed, the repair section is made in the form of a metal pipe with sealing elements in the grooves, and the internal channels of the pipeline are calibrated from the side of the defective section to the outer diameter of the metal pipe. Next, a metal pipe is introduced into one section of the pipeline, and then into another, followed by fastening the metal pipe to sections of the pipeline adjacent to the remote section.

The disadvantage of this technical solution is the use of a pipe made of metal, the expansion temperature of which may differ from the temperature of the expansion of the fiberglass pipeline to be repaired. The disadvantage is also a large amount of earthwork associated with the opening of the soil at the length of the pipe with the defective area, as well as the removal of the defective area. The proposed method requires calibration of the internal channels of the pipeline, which increases labor costs. The installation of the repair site in the proposed method is carried out in the inner cavity of the pipeline, which significantly narrows its working section.

Also known is a method for repairing fiberglass pipes using a threaded insert (patent RU No. 2742961, IPC F16L 47/16, F16L 47/06, publ. a site with consolidation and sealing at the ends of the pipeline adjacent to a remote defective area. In this case, at least one end of the repaired fiberglass pipe is ground with a cone, on which a threaded insert is installed with preliminary application of a thermosetting adhesive composition on the inner surface of the threaded insert and/or on the outer surface of the pipe cone. Then, an element of the repair kit is introduced into the raised sections of the repair pipes, which has two opposite threads at the ends. When lowering the pipeline, the specified element is rotated, ensuring its gradual lead with elements with the left internal thread and the right internal thread.

The disadvantage of this method is a large amount of excavation: it is necessary to open the soil along the length of the pipe with a defective section, as well as at the ends of the repaired pipes to lift them (the larger the diameter of the pipeline, the longer the section to lift). Other disadvantages are the duration of the repair due to the need for polymerization of the adhesive composition and the difficulty of polymerization of the adhesive composition at low temperatures in winter.

The closest is the method of repairing fiberglass pipes by lamination (see "Guidelines for the repair of flared fiberglass pipes "HELYXtm" of the Limited Liability Company BioPlast LLC www.helyx.ru, pp. 6-7), including the installation of a fiberglass pipeline on the outer surface ( to the defect site) of a bandage using a filler of resin and fiberglass or a repair layer of fiberglass or repair segments.

The disadvantage of this method is the complexity of quality control of manual work in the field in any weather. Another disadvantage is the difficulty of resin polymerization at low temperatures in winter, as well as the need to ensure a dry and fat-free condition of the pipeline surface to be repaired, which requires its complete emptying.

The technical objectives of the invention are to increase the efficiency of the method of repairing fiberglass pipes by increasing the reliability and ensuring the quality of work, including at negative ambient temperatures, as well as reducing the volume of earthworks and optimizing the cost of repair work.

The set technical problems are solved by the method of repairing fiberglass pipes, including the installation of a bandage on the outer surface of a fiberglass pipeline with a defect.

The new one is that two segments with internal terminals at the ends are used as a bandage, after installing the segments, they are fastened with each other, during the fastening of the segments and the fiberglass pipeline, the heat -insulating laying is installed, sealing elements are installed along the ends of the fastened segments, and behind the sealing elements Installed and fastened together prefabricated pushers, after fastening the prefabricated pushers, they carry out their axial displacement towards the ends of the fastened segments with the possibility of stopping the sealing elements to the internal terminal grooves and the compression and subsequent fixation from further axial displacement.

In FIG. 1 shows a fiberglass pipe in the area of a defect in a fiberglass pipeline of segments with internal end grooves, sealing elements made of elastic material and prefabricated pushers.

In FIG. 2 shows the view A-A.

In FIG. 3 shows a B-B view.

In FIG. 4 shows the process of fastening the segments to each other and the process of fastening prefabricated pushers.

In FIG. 5 shows the process of compression of sealing elements made of elastic material by axial displacement of prefabricated pushers.

The way to repair fiberglass pipes is as follows.

Two segments 3 (Fig. 1, FIG. 2) that perform the bandage function (i.e. use two segments are used on the outer surface of the area of the fiberglass pipeline 1 (FIG 1) with a defect 2), with end grooves 4 ( Fig. 1) at the ends, which can be made of steel or solid polymeric material (for example, fiberglass, textolite, etc.). After installing the segments 4 (Fig. 4) they are fastened together. If segments 3 are performed from steel, fastening is carried out with welding, if segments 3 are performed from polymer material, fastening is carried out by gluing. In the process of fastening between segments 3 and fiberglass pipeline 1, a thermal insulation gasket is installed (it is not depicted in FIG. 1-4), for example, from asbestos, in order to avoid a fiberglass burn. To strengthen gluing, winding of fiberglass, impregnated with glue, can be carried out.

On the ends of the fastened segments 3 (Fig. 1), sealing elements 5 of elastic material are installed, for example, representing cut rings or bundles, wound on fiberglass pipeline 1. Behind the sealing elements 5 are installed and fastened together with welding tacks, prefabricated pushers 6 (FIG 1 , figure 3, figure 4), which are segments made of steel. After fastening the prefabricated pushers 6 (FIG. 5), their axial displacement is carried out towards the ends of the fastened segments 3. At the same time, the prefabricated pushers 6 shift the sealing elements 5 inside the ends of the fastened segments 3 until they stop their internal end grooves 4 and compression, sealing the cavity between fastened segments 3 and the repair site of the pipeline 1. After that, the prefabricated pushers 6 are fixed from further axial displacement. If segments 3 are made of steel, fixation is carried out by welding tacks to them of prefabricated pushers 6. If segments 3 are made of polymeric material, then axial displacement and fixation of prefabricated pushers 6 is carried out by a thread made on the outer surface of prefabricated pushers 6 and on the inner surface of the end grooves 4 segments 3.

This ensures tightness, increases the reliability and quality of repair work. During the repair of fiberglass pipes, the working section of the pipeline is not narrowed, the bandage is installed on the outer surface of the pipeline, without requiring the pipeline to be emptied and the defective section to be removed (it is necessary to open only the place of the pipeline rupture). In this case, there is no need to calibrate the ends of the repaired pipeline.

The proposed method improves the efficiency of repairing fiberglass pipes at any ambient temperature, promptly eliminates the leakage of the pumped liquid, reduces the amount of earthworks and optimizes the cost of repair work.

Claims (1)

A method for repairing fiberglass pipes, including installing a bandage on the outer surface of a fiberglass pipeline with a defect, characterized in that two segments with internal end grooves at the ends are used as a bandage, after installing the segments, they are fastened together, in the process of fastening between the segments and the fiberglass pipeline a heat-insulating gasket is installed, sealing elements are installed at the ends of the fastened segments, prefabricated pushers are installed and fastened together behind the sealing elements, after fastening the prefabricated pushers, they are axially displaced towards the ends of the fastened segments with the possibility of sealing elements resting against the internal end grooves and compression and subsequent fixation from further axial displacement.

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