CN216666895U - A steel epoxy sleeve for increasing the axial restraint force of the pipeline - Google Patents

Abstract

The utility model discloses a steel epoxy sleeve for increasing the axial restraint force of a pipeline, which comprises two first steel sleeves, two second steel sleeves and an epoxy resin glue layer, wherein the epoxy resin layer is coated on a pipeline repairing part, the two first steel sleeves are fixed on the pipeline through flanges, the two first steel sleeves are arranged on two end faces of the epoxy resin glue layer, one end of each first steel sleeve is provided with an outer wedge-shaped structure, the two first steel sleeves are symmetrically arranged relative to a pipeline defect part, the two second steel sleeves are arranged on the peripheral wall of the epoxy resin glue layer, one end of each second steel sleeve is provided with an inner wedge-shaped structure matched with the corresponding first steel sleeve, the other end of each second steel sleeve is provided with a locking flange, the two second steel sleeves are connected to the peripheral side of the epoxy resin glue layer through flanges, and the outer wedge-shaped structures are matched with the inner wedge-shaped structures. The utility model discloses a solve the pipeline and restore the position and receive easy damage problem along axial extension behind the axial stress.

Description

A steel epoxy sleeve for increasing the axial restraint force of the pipeline

technical field

The utility model belongs to the technical field of pipeline repair, in particular to a steel epoxy sleeve for increasing the axial restraint force of the pipeline.

Background technique

Pipelines are the most important way of transporting natural gas. Natural gas pipelines have become the focus of pipeline construction at home and abroad. During the service period of pipelines, the main loads received by pipelines include dead loads such as pipeline structure self-weight, overburden load, and fluid gravity, as well as traffic loads, ground stacking loads, and temperature loads. , pipeline internal pressure, floating load, seismic load and other live loads.

The steel epoxy sleeve repair technology is a widely used pipeline repair method at present. It can repair the defective parts of the pipeline without affecting the pipeline transportation. However, the pipeline repaired by the epoxy steel sleeve continues to serve. During the process, the above-mentioned loads will still be affected, and the repaired part of the pipeline is prone to expand and damage in the axial direction after being subjected to axial stress.

Utility model content

The purpose of the utility model is to propose a steel epoxy sleeve which increases the axial restraint force of the pipeline in order to solve the problem that the repaired part of the pipeline is easy to expand and damage in the axial direction after being subjected to axial stress.

In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

A steel epoxy sleeve for increasing the axial restraint force of a pipeline, comprising two first steel sleeves, two second steel sleeves, and an epoxy resin adhesive layer, the epoxy resin adhesive layer wrapping the pipeline At the repair site, the two first steel sleeves are fixed on the pipeline through flanges, the two first steel sleeves are arranged on both ends of the epoxy resin adhesive layer, and one end of the first steel sleeve is An outer wedge-shaped structure is provided, the two first steel sleeves are symmetrically arranged with respect to the defective part of the pipeline, the outer wedge-shaped structure end of the first steel sleeve is in contact with the epoxy resin adhesive layer, and the two second A steel sleeve is arranged on the outer peripheral wall of the epoxy resin adhesive layer, one end of the second steel sleeve is provided with an inner wedge structure matched with the first steel sleeve, and the other end of the second steel sleeve is arranged There are locking flanges, the two second steel sleeves are connected to the outer peripheral side of the epoxy resin adhesive layer through flanges, and the outer wedge-shaped structure and the inner wedge-shaped structure are mutually matched.

As a further description of the above technical solution:

The first steel sleeve includes two first half-arc plates, the two first half-arc plates are connected by flanges, one end of the first half-arc plates is provided with an outer wedge-shaped structure, and the two first half-arc plates are After the half-arc plates are spliced together, the outer wedge-shaped structure is in the shape of a conical cylinder.

As a further description of the above technical solution:

The second steel sleeve is assembled from two second half-arc plates through flange connection, and an axial end of the second half-arc plate is provided with a locking flange, and the locking flange is provided with a locking flange. On the outer peripheral wall of the second half-arc plate, the locking flange on the second steel sleeve forms a circular ring as a whole, and the inner peripheral wall of the other end of the second half-arc plate forms an inner wedge-shaped structure.

As a further description of the above technical solution:

Four reinforcing ribs are arranged at equal intervals on the circumference between the locking flange and the second steel sleeve.

As a further description of the above technical solution:

A sealing plate is arranged between the two second steel sleeves, the sealing plate is arranged at the end of the second half-arc plate, and the sealing plate is used to block the gap between the two second steel sleeves .

As a further description of the above technical solution:

A through hole is opened on the second steel sleeve.

To sum up, due to the adoption of the above-mentioned technical solutions, the beneficial effects of the present utility model are:

(1) The epoxy steel sleeve utilizes the mutual force between the two second steel sleeves and the frictional force between the first steel sleeve and the pipeline to increase the axial restraint force on the repaired part of the pipeline, Simple structure and convenient installation.

(2) The reinforcing rib between the second steel sleeve and the locking flange can not only strengthen the connection stability between the locking flange and the second steel sleeve, but also provide positioning for the hydraulic caliper.

(3) The sealing plate seals the gap between the two second steel sleeves to prevent the epoxy resin from overflowing when the epoxy resin is injected into the annular cavity.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is the explosion schematic diagram of the present utility model;

Figure 3 is a cross-sectional view of the utility model.

Legend description: 1. The first steel sleeve; 2. The first half-arc plate; 3. The second steel sleeve; 4. The second half-arc plate; 5. The epoxy resin layer; 6. The locking flange; 7. Reinforcing ribs; 8. Through holes; 9. Sealing plate.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Figures 1-3, the utility model provides a technical solution:

A steel epoxy sleeve for increasing the axial restraint force of a pipeline comprises two first steel sleeves 1 , two second steel sleeves 3 , and epoxy resin glue. The two first steel sleeves 1 are fixed on the pipeline, the inner peripheral wall of the first steel sleeve 1 is attached to the outer peripheral wall of the pipeline, the two first steel sleeves 1 are symmetrical with respect to the repair part of the pipeline, and the two first steel sleeves 1 1 with a certain distance between them. The epoxy resin adhesive layer 5 is covered on the pipeline repairing part, and the epoxy resin adhesive layer 5 is solidified by epoxy resin adhesive, and the epoxy resin adhesive layer 5 is arranged between the two first steel sleeves 1 . The first steel sleeve 1 is connected by two first half-arc plates 2 through flanges. One end of the first half-arc plates 2 is provided with an outer wedge-shaped structure. After the two first half-arc plates 2 are spliced together, the outer wedge-shaped structure is a conical cylinder. The outer wedge structures on the two first steel sleeves 1 are arranged facing each other.

Two second steel sleeves 3 are arranged on the outer peripheral side of the first steel sleeve 1 and the epoxy resin adhesive layer 5 , an annular cavity is formed between the second steel sleeve 3 and the outer peripheral wall of the pipeline, and the epoxy resin adhesive layer 5 Located in the annular cavity, the second steel sleeve 3 is assembled by two second half-arc plates 4 through flange connection, and the axial end of the second half-arc plate 4 is provided with a locking flange 6 to lock the The tightening flange 6 is welded and fixed on the outer peripheral wall of the second half arc plate 4, the locking flange 6 on the second steel sleeve 3 forms a circular ring as a whole, and the inner peripheral wall of the other end of the second half arc plate 4 is formed The inner wedge-shaped structure, the inner wedge-shaped structure of the second steel sleeve 3 is adapted to the outer wedge-shaped structure of the first steel sleeve 1, and the locking flange 6 and the second steel sleeve 3 are welded and fixed at equal intervals around the circumference. Reinforcing ribs 7, two second steel sleeves 3 are symmetrically arranged, the locking flanges 6 on the two second steel sleeves 3 are arranged opposite to each other and have a certain interval, and a Sealing plate 9, the sealing plate 9 is arranged at the end of the second half arc plate 4, the sealing plate 9 and the locking flange 6 are located at the same end of the second half arc plate 4, the sealing plate 9 extends out of the second steel sleeve 3 At the end, the sealing plate 9 is welded and fixed on the inner peripheral wall of the second half-arc plate 4, the sealing plate 9 is in a semi-circular ring shape, the sealing plate 9 is welded and fixed on the inner peripheral wall of the second half-arc plate 4, and the two sealing plates 9 are spliced into a circular ring. The sealing plate 9 is used to block the gap between the two second steel sleeves 3 .

Working principle: First determine the installation position of the first steel sleeve 1 according to the reinforcement part of the pipe, mark the installation position with a marker, then polish the marked area on the pipe, and then pass the two first half-arc plates 2 through Flange installation, two first steel sleeves 1 are symmetrically arranged with respect to the pipe reinforcement.

Then install the second steel sleeve 3, match the inner wedge-shaped structure of the two second half-arc plates 4 with the outer wedge-shaped structure of the first steel sleeve 1, and then connect the two second half-arc plates through flanges 4. The other steel sleeve is installed in the same way; after the installation of the two second steel sleeves 3 is completed, there is a certain distance between the locking flanges 6 of the two second steel sleeves 3, and the two The locking flanges 6 of the two steel sleeves 3 are tightened by bolts, and four hydraulic clamps are used to clamp the locking flanges 6. Four hydraulic clamps are arranged at equal intervals around the circumference, and each hydraulic clamp clamps the second steel sleeve. At the reinforcing rib 7 of the cylinder 3, the four hydraulic pliers apply the same force and then tighten the bolts on the locking flange 6. During the tightening process, the second steel sleeve 3 and the first steel sleeve 1 are clamped. During the clamping process of the hydraulic caliper, the two second steel sleeves 3 tend to move towards each other. While the first steel sleeve 1 and the second steel sleeve 3 are clamped, the second steel sleeve 3 is opposite to the first steel sleeve. The cylinder 1 generates a certain pressure at the position of the wedge-shaped structure, which increases the friction between the first steel sleeve 1 and the outer peripheral wall of the pipeline. Both ends generate axial force, and the axial force all points to the reinforcement part of the pipeline. When the reinforcement part of the pipeline is subjected to the expansion force, the generated axial force will offset it.

Use sealing material to seal the gap between the two second steel sleeves 3 and between the second steel sleeve 3 and the first steel sleeve 1, to the gap formed between the second steel sleeve 3 and the outer peripheral wall of the pipeline. The annular cavity is filled with epoxy resin glue. The annular cavity is evacuated through the through hole 8 of one second steel sleeve 3 and then the epoxy resin is injected into the annular cavity from the through hole 8 of the other second steel sleeve 3. When the through hole 8 is evacuated Close the feed valve when epoxy resin is spilled. After the epoxy resin is cooled and formed, the sleeve is installed.

The sealing material is a mixture of 6 parts of epoxy resin glue and 10 parts of wollastonite powder.

The above descriptions are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (6)

1. A steel epoxy sleeve for increasing the axial restraint force of the pipeline is characterized in that it comprises two first steel sleeves (1), two second steel sleeves (3), an epoxy resin adhesive layer ( 5), the epoxy resin adhesive layer is covered on the pipeline repair site, the two first steel sleeves (1) are fixed on the pipeline through flanges, and the two first steel sleeves (1) are provided On both ends of the epoxy resin adhesive layer (5), one end of the first steel sleeve (1) is provided with an outer wedge-shaped structure, and the two first steel sleeves (1) are symmetrically arranged with respect to the defective part of the pipeline , the end of the outer wedge structure is in contact with the epoxy resin adhesive layer (5), and the two second steel sleeves (3) are arranged on the outer peripheral wall of the epoxy resin adhesive layer (5). One end of the second steel sleeve (3) is provided with an inner wedge structure matched with the first steel sleeve (1), and the other end of the second steel sleeve (3) is provided with a locking flange (6), The two second steel sleeves (3) are connected to the outer peripheral side of the epoxy resin adhesive layer (5) through flanges, and the outer wedge-shaped structure and the inner wedge-shaped structure are adapted to each other. 2 . The steel epoxy sleeve for increasing the axial restraint force of the pipeline according to claim 1 , wherein the first steel sleeve ( 1 ) comprises two first half-arc plates ( 2 ). 3 . , the two first half-arc plates (2) are connected by flanges, one end of the first half-arc plate (2) is provided with an outer wedge-shaped structure, and after the two first half-arc plates (2) are spliced, The outer wedge-shaped structure is in the shape of a cone. 3. The steel epoxy sleeve for increasing the axial restraint force of the pipeline according to claim 2, wherein the second steel sleeve (3) consists of two second half-arc plates (4) It is assembled by flange connection, and an axial end of the second half arc plate (4) is provided with a locking flange (6), and the locking flange (6) is arranged on the second half arc plate (4). The outer peripheral wall of the arc plate (4), the locking flange (6) on the second steel sleeve (3) forms a circular ring as a whole, and the inner peripheral wall of the other end of the second half arc plate (4) An inner wedge-shaped structure is formed. 4. A steel epoxy sleeve for increasing the axial restraint force of the pipeline according to claim 3, characterized in that: the connection between the locking flange (6) and the second steel sleeve (3) Four reinforcing ribs (7) are arranged at equal intervals on the circumference. 5. The steel epoxy sleeve for increasing the axial restraint force of the pipeline according to claim 3, wherein a sealing plate (9) is arranged between the two second steel sleeves (3). The sealing plate (9) is arranged at the end of the second half-arc plate (4), and the sealing plate (9) is used to block the gap between the two second steel sleeves (3). 6 . The steel epoxy sleeve for increasing the axial restraint force of the pipeline according to claim 1 , wherein a through hole ( 8 ) is formed on the second steel sleeve ( 3 ). 7 .

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