CN211450045U

CN211450045U - Coating structure for repairing gas pipeline

Info

Publication number: CN211450045U
Application number: CN201922293666.1U
Authority: CN
Inventors: 王庆; 陈幸福; 程勇; 赵璇; 周玉洁; 孔亚琼
Original assignee: Aerosun Tola Expansion Joint Co ltd
Current assignee: Aerosun Tola Expansion Joint Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-09-08
Anticipated expiration: 2029-12-19

Abstract

The utility model relates to a cladding structure for repairing a gas pipeline, which comprises a cladding piece formed by connecting a left annular plate, a corrugated pipe, a middle connecting pipe, a middle annular plate, an external connecting pipe and a right annular plate in sequence; the middle ring plate, the external connecting pipe and the right ring plate form a structure with a cross section in a shape like a Chinese character 'men', and the cross section can be coated outside the damaged corrugated pipe on the gas pipeline; the left annular plate and the right annular plate are fixedly connected to a gas pipeline. The utility model relates to a rationally, simple structure, simple to operate can realize under the circumstances of not shutting down, repairs the gas piping that appears the damage, has not only guaranteed the incessant of production and has gone on, can also simplify operating procedure, raises the efficiency, reduces expenses such as manual work, is worth promoting.

Description

Coating structure for repairing gas pipeline

Technical Field

The utility model relates to a pipeline connection structure, especially a cladding structure for gas pipeline repairs, specific cladding structure who repairs gas pipeline that says so.

Background

The medium in the gas pipeline equipment is gas, and the main component is carbon monoxide. Carbon monoxide is colorless, odorless, tasteless and insoluble gas, is inflammable and explosive, can form an explosive mixture when being mixed with air, can cause combustion and explosion when meeting open fire and high temperature, and simultaneously has strong toxicity to cause human poisoning. When the corrugated pipe compensator for the gas pipeline equipment leaks and fails, if the corrugated pipe compensator is directly cut and replaced, the gas in the pipeline equipment is easy to explode, so that the whole pipeline equipment is required to be stopped, and the gas in the pipeline equipment is replaced by nitrogen gas filled in the pipeline equipment, and then the failed compensator can be cut and replaced. However, this method requires a long downtime of the entire pipeline apparatus, which has a great influence on the normal operation of the production, and therefore, improvement is urgently required.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a repair gas piping's cladding structure to the problem that meets at present in gas piping repair process, can realize under the circumstances of not shutting down, repair damaged gas piping appearing, not only can guarantee the normal clear of production, can also simplify the operating procedure, raise the efficiency, reduce expenses such as manual work.

The technical scheme of the utility model is that:

a cladding structure for repairing a gas pipeline comprises a cladding piece formed by sequentially connecting a left ring plate, a corrugated pipe, a middle connecting pipe, a middle ring plate, an external connecting pipe and a right ring plate; the middle ring plate, the external connecting pipe and the right ring plate form a structure with a cross section in a shape like a Chinese character 'men', and the cross section can be coated outside the damaged corrugated pipe on the gas pipeline; the left annular plate and the right annular plate are fixedly connected to a gas pipeline.

Further, the fireproof glass fiber reinforced plastic composite material further comprises a wrapping cover, wherein the wrapping cover is made of fireproof silica gel cloth; the wrapping cover is positioned in the wrapping piece and wraps the damaged corrugated pipe, and the edges of two sides of the wrapping cover are fixedly connected to the gas pipeline through a pipe hoop so that a first sealing cavity is formed in the wrapping cover; and a second sealing cavity is formed among the cladding piece, the gas pipeline and the wrapping cover.

Further, an exhaust pipe communicated with the interior of the wrapping cover is arranged on the wrapping cover; the exhaust pipe can extend out of the external connecting pipe from a flange port arranged on the external connecting pipe.

Furthermore, a blind flange can be arranged on the flange opening to seal the flange opening.

Further, the external connecting pipe is also provided with an air inlet and an air outlet; ball valves are respectively arranged on the air inlet and the air outlet.

The utility model has the advantages that:

the utility model relates to a rationally, simple structure, simple to operate can realize under the circumstances of not shutting down, repairs the gas piping that appears the damage, has not only guaranteed the incessant of production and has gone on, can also simplify operating procedure, raises the efficiency, reduces expenses such as manual work, is worth promoting.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Wherein: 1-wrapping a cover; 2-pipe hoop; 3-exhaust pipe I; 4-intermediate connection pipe; 5-external connection pipe; 6-a corrugated tube; 7-middle ring plate; 8-broken bellows; 9-a gas pipe; 10-left ring plate; 11-right ring plate; 12-a second sealed chamber; 13-an air inlet; 14-an air outlet; 15-flange mouth; 16-an oxygen content detector; 17-exhaust pipe II; 18-first sealed chamber.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1.

A cladding structure for repairing a gas pipeline comprises a cladding piece formed by sequentially connecting a left ring plate 10, a corrugated pipe 6, a middle connecting pipe 4, a middle ring plate 7, an external connecting pipe 5 and a right ring plate 11. The middle ring plate 7, the outer connecting pipe 5 and the right ring plate 11 form a structure with a cross section in a shape like a Chinese character 'men', and can be coated outside the damaged corrugated pipe 8 on the gas pipeline 9. The left annular plate 10 and the right annular plate 11 are fixedly connected on the gas pipeline 9, so that the whole cladding piece is fixedly connected with the gas pipeline.

The cladding structure also comprises a wrapping cover 1. The wrapping cover 1 is made of fireproof silica gel cloth and has a good fireproof function. The wrapping cover 1 is arranged in the wrapping piece and wraps the damaged corrugated pipe 8, and the edges of two sides of the wrapping cover are fixedly connected on the gas pipeline 9 through the pipe hoop 2, so that a first sealing cavity 18 is formed in the wrapping cover, and the gas at the damaged part can be prevented from continuously leaking outwards. At the same time, a second sealed chamber 12 is formed between the cladding and the gas pipe 9 and the wrap-around cover 1.

Furthermore, an exhaust pipe I3 is provided on the packing cover 1 and penetrates the interior thereof, and the exhaust pipe I3 extends out of the external pipe 5 from a flange port 15 provided on the external pipe 5, so as to exhaust the gas in the first sealed chamber 18. The flange opening 15 can be closed by fitting a blind flange thereto.

The external connecting pipe 5 is also provided with an air inlet 13 and an air outlet 14, and the air inlet 13 and the air outlet 14 are respectively provided with a ball valve which can control the opening and closing of the air inlet and the air outlet.

The utility model discloses a construction method includes following step:

1) in a factory, a left ring plate 10, a corrugated pipe 6, a middle connecting pipe 4, a middle ring plate 7, an external connecting pipe 5 and a right ring plate 11 are sequentially welded into a cladding piece, and the cladding piece is axially divided into two equal parts or three equal parts so as to be convenient to transport and install;

2) wrapping the damaged corrugated pipe 8 on the gas pipeline 9 by using the wrapping cover 1, and fixing the edges of two sides of the wrapping cover 1 on the gas pipeline 9 by using the pipe hoop 2 to form a first sealing cavity 18;

3) enclosing all the equal parts of the coating parts outside the gas pipeline 9 and the coating cover 1, and connecting and fixing the parts at the splicing positions by using reserved pull rod nuts; then, the exhaust pipe I3 is led out from the flange port 15 so as to lead out the gas in the first sealed cavity 18; meanwhile, the pressure in the gas pipe is adjusted to be positive pressure, so that the gas stored in the first sealed cavity 18 can be discharged from the exhaust pipe I3;

4) adhering and sealing longitudinal splicing seams among the equal parts of coating parts by using a paper adhesive tape, and adhering and sealing circumferential seams at the joints of the left ring plate 10 and the right ring plate 11 and the gas pipeline 9 so as to form a second sealing cavity 12 and prevent external air from entering the second sealing cavity 12;

5) filling nitrogen with the pressure of 20KPa into the second sealed cavity 12 from the gas inlet 13, simultaneously opening the gas outlet 14, discharging the gas in the second sealed cavity 12 through the gas outlet pipe II17, and replacing the gas in the second sealed cavity 12 to form a mixed gas of nitrogen and coal gas;

6) detecting the oxygen content in the discharged gas by an oxygen content detector 16 arranged at the nozzle part of the exhaust pipe II 17; when the detection value is smaller than the explosion limit value, the cladding piece is welded;

7) after all welding seams are welded, splicing all equal parts of cladding pieces into a complete cladding piece, firmly connecting the complete cladding piece with a gas pipe, cutting off the exhaust pipe I3, and sealing the flange opening 15 by using a blind flange; at the same time, the ball valves at the gas inlet 13 and the gas outlet 14 are closed, so that the second seal chamber 12 is completely sealed.

In the step 3) and the step 5), the exhaust pipe I3 and the exhaust pipe II17 respectively extend to a construction site beyond 15 meters, so that the site safety is ensured.

In the step 6), welding longitudinal splicing seams of the enclosed equal parts of the cladding pieces, and then welding circumferential welding seams at the outer sides of the joints of the left ring plate and the right ring plate and the gas pipeline; the paper tape does not need to be torn off during welding.

The utility model has the advantages of it is following:

1. the gas pipeline equipment can be kept without stopping, and the cost loss is reduced.

2. The potential safety hazard caused by the leakage of the on-site gas is eliminated.

3. Replace the damaged bellows, possess the compensation simultaneously.

The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.

Claims

1. A cladding structure for repairing a gas pipeline is characterized in that: the cladding structure comprises a cladding piece formed by sequentially connecting a left ring plate, a corrugated pipe, a middle connecting pipe, a middle ring plate, an external connecting pipe and a right ring plate; the middle ring plate, the external connecting pipe and the right ring plate form a structure with a cross section in a shape like a Chinese character 'men', and the cross section can be coated outside the damaged corrugated pipe on the gas pipeline; the left annular plate and the right annular plate are fixedly connected to a gas pipeline.

2. The coating structure for repairing a gas pipe as claimed in claim 1, wherein: the fireproof silica gel cloth is characterized by also comprising a wrapping cover, wherein the wrapping cover is made of fireproof silica gel cloth; the wrapping cover is positioned in the wrapping piece and wraps the damaged corrugated pipe, and the edges of two sides of the wrapping cover are fixedly connected to the gas pipeline through a pipe hoop so that a first sealing cavity is formed in the wrapping cover; and a second sealing cavity is formed among the cladding piece, the gas pipeline and the wrapping cover.

3. The coating structure for repairing a gas pipe as claimed in claim 2, wherein: an exhaust pipe communicated with the interior of the wrapping cover is arranged on the wrapping cover; the exhaust pipe can extend out of the external connecting pipe from a flange port arranged on the external connecting pipe.

4. The coating structure for repairing a gas pipe as claimed in claim 3, wherein: the flange opening can be provided with a blind flange to seal the flange opening.

5. The coating structure for repairing a gas pipe as claimed in claim 1, wherein: the external connecting pipe is also provided with an air inlet and an air outlet; ball valves are respectively arranged on the air inlet and the air outlet.