Gas flow main pipe online replacement system

Abstract

The invention discloses a gas flow main pipe online replacement system, and relates to the technical field of online replacement. The gas flow main pipe online replacement system comprises a main pipe, a bypass pipe and connecting pieces, the bypass pipe is located on the outer side of the main pipe, the main pipe and the bypass pipe are both sleeved with the connecting pieces, the main pipe comprises a modularized gas conveying pipe and a main pipe ball valve, and the main pipe ball valve is located on the outer side of the modularized gas conveying pipe. The number of the modularized gas conveying pipes is multiple. According to the online replacement system for the gas flow main pipe, the overhauling ball valves are arranged and can be connected with the bypass pipeline, a bypass is formed by closing the main pipeline ball valves on the two sides of the overhauling section and opening the overhauling ball valves connected with the bypass pipeline, and the main pipeline which is damaged or needs to be upgraded can be replaced under the condition that production is not stopped; the system can effectively reduce production stagnation caused by maintenance or replacement of the main pipeline, and the production efficiency and the economical efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipelines, and in particular to an online replacement system for a gas flow main pipe. Background Art

[0002] The transmission of fluids through pipelines is a common technology that has been widely used. When a part of the pipeline suddenly leaks or bursts due to corrosion or other unexpected situations during operation, emergency repairs are required. Conventional technology can use local clamps-rubber pads to plug leaks, while for bursts and other situations that require pipeline replacement, production can only be stopped. The pipeline is shut down, and the suspension of production to replace the pipeline will bring economic losses to the enterprise. If the mid-term maintenance is not handled properly, it is easy to cause production and safety accidents. The online replacement system for gas flow mains is mainly to be able to replace damaged or upgraded gas mains without stopping production during the gas transportation process. This system can effectively reduce production stagnation caused by the maintenance or replacement of gas mains, and improve production efficiency and economy.

[0003] In the prior art, when a local gas flow main pipeline leaks, temporary blocking measures are generally taken to temporarily solve the problem in order to ensure production efficiency; when the gas flow main pipeline is seriously damaged and needs to be repaired or replaced, the traditional repair and replacement methods require stopping the use of the pipeline, and the pipeline shutdown causes shutdown of work and production, affecting production efficiency.

[0004] The traditional replacement method requires stopping the use of the pipeline, resulting in shutdowns and production stoppages, which affects production efficiency and cannot guarantee the continuity and stability of production. Temporary blocking measures can temporarily alleviate the problem but cannot fundamentally eliminate safety hazards. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an online replacement system for a gas flow main, which solves the problem that the traditional replacement method requires the pipeline to be stopped, resulting in shutdowns, affecting production efficiency, and failing to ensure the continuity and stability of production; although temporary blocking measures can temporarily alleviate the problem, they cannot fundamentally eliminate the safety hazard.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a gas flow main online replacement system, comprising a main pipeline, a bypass pipeline and a connector, wherein the bypass pipeline is located outside the main pipeline, and the outsides of the main pipeline and the bypass pipeline are sleeved with connectors, characterized in that the main pipeline comprises a modular gas pipeline and a main pipeline ball valve, and the main pipeline ball valve is located outside the modular gas pipeline, and the modular gas pipeline is provided with a plurality of them, and a docking flange is provided outside the modular gas pipeline, and the docking flange is located at both ends of the modular gas pipeline; The bypass pipeline includes a bypass gas pipe and an input end. The input end is located outside the bypass gas pipe. There are multiple bypass gas pipes. The bypass gas pipe is provided with a docking flange like the modular gas pipe. The docking flange is located at both ends of the bypass gas pipe.

[0007] Preferably, a plurality of main line ball valves are provided, and the main line ball valve is located between two modular gas pipes, and the main line ball valve is fixedly connected to the modular gas pipes.

[0008] Preferably, the main pipeline also includes a tee and a maintenance ball valve, the maintenance ball valve is located outside the tee, the tee is located between two groups of modular gas pipes, and the tee is fixedly connected to the modular gas pipes, and the tee is arranged between the main pipeline ball valves.

[0009] Preferably, the inspection ball valve is fixedly connected to the three-way pipe. The inspection ball valve is located outside the modular gas pipe and is not connected to the modular gas pipe. The design of the inspection ball valve facilitates the establishment of a bypass pipeline. The bypass pipeline is used to allow the gas flow to bypass the damaged modular gas pipe, which facilitates the repair and replacement of the damaged part while ensuring the continuity and stability of production.

[0010] Preferably, both ends of the main line ball valve and the three-way pipe are provided with docking flanges, and the modular gas pipeline, the main line ball valve and the three-way pipe are arranged in sequence: modular gas pipeline, three-way pipe, modular gas pipeline, main line ball valve, and the main line ball valve and the three-way pipe are located at both ends of the modular gas pipeline.

[0011] Preferably, a plurality of the bypass gas pipelines are connected in series, and a flow pressure detector is provided on the bypass gas pipeline located in the middle, and the flow pressure detector is fixedly connected to the bypass gas pipeline.

[0012] Preferably, the input end is located between the bypass gas supply pipe and the inspection ball valve, docking flanges are fixedly provided at both ends of the input end, the input end is fixedly connected to the inspection ball valve, an air intake valve is provided on the outside of the input end, the other end of the air intake valve is connected to a hose, and the other end of the hose is connected to a liquefied gas tank.

[0013] Preferably, the bypass pipeline also includes an output end, both ends of which are fixedly provided with docking flanges, the output end is fixedly connected to the bypass gas pipe, and the output end is located on one side of the principle input end, the output end is fixedly connected to the outside of the inspection ball valve, the outside of the output end is fixedly connected with a compression pump, and the compression pump is connected to a gas storage tank. By utilizing the air intake valve, liquefied gas tank, compression pump and gas storage tank, gas impurities in the bypass pipeline can be removed to ensure the purity of the coal gas flow in the pipeline.

[0014] Preferably, the connecting piece includes a card shell and a sealing gasket, the sealing gasket is located on the inner side of the card shell, the card shell is provided with two groups, a card slot is opened on the inner side of the card shell, the sealing gasket is clamped on the inner side of the card slot, a protective pad is provided on the outer side of the card shell, a bolt is inserted into the inner side of the protective pad, and the bolt passes through the card shell.

[0015] Preferably, the sealing gasket is sleeved on the outside of the docking flange, and the card shell is clamped on the outside of the docking flange.

[0016] The present invention discloses an online replacement system for a gas flow main pipe, which has the following beneficial effects: The coal gas flow main online replacement system is provided with a maintenance ball valve, which can be connected to a bypass pipeline. By closing the main pipeline ball valves on both sides of the maintenance section and opening the maintenance ball valve connected to the bypass pipeline to form a bypass, the main pipeline that is damaged or needs to be upgraded can be replaced without stopping production. This system can effectively reduce production stagnation caused by main pipeline maintenance or replacement, and improve production efficiency and economy. A bypass pipeline is provided, and by utilizing an air inlet valve, a liquefied gas tank, a compression pump and a gas storage tank, the liquefied gas tank stores liquefied coal gas, and the compression pump can compress the gas into and out of the gas pipe, and can remove gas impurities in the bypass pipeline to ensure the purity of the coal gas flow in the pipeline.

[0017] The gas flow main online replacement system establishes a bypass pipeline, connects the input end to the inspection ball valve before the main line ball valve in front of the damaged modular gas pipeline, and connects the output end to the inspection ball valve after the main line ball valve behind the damaged modular gas pipeline. The input and output ends are connected by a bypass gas pipeline and sealed with connectors; connects the liquefied gas tank to the air inlet valve, opens the air inlet valve and the liquefied gas tank to inject gas into the bypass pipeline, and at the same time opens the compression pump to extract air impurities in the bypass pipeline and compresses them into the gas storage tank. This operation is performed until the gas purity in the bypass pipeline meets the standard.

[0018] The gas flow main online replacement system closes the air intake valve and the compression pump to seal the bypass pipe, opens the inspection ball valve connected to the bypass pipe, and then closes the main pipe ball valves at both ends of the modular gas pipe that needs repair, so that the gas flow bypasses the damaged part and continues to be transported from the bypass pipe. The damaged modular gas pipe is then replaced. After the replacement is completed, the main pipe ball valve is opened to unblock the main pipeline, the inspection ball valve is closed, and a sealing test is performed on the connection of the replaced modular gas pipe to ensure that there is no leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the main pipeline structure of the present invention; Figure 3 It is a structural schematic diagram of the bypass pipeline of the present invention; Figure 4 It is a structural schematic diagram of the input end of the bypass pipeline of the present invention; Figure 5 It is a structural schematic diagram of the output end of the bypass pipeline of the present invention; Figure 6 It is a schematic structural diagram of the connecting piece of the present invention.

[0020] In the figure: 1. main pipeline; 11. modular gas pipeline; 12. main pipeline ball valve; 13. three-way pipe; 14. inspection ball valve; 2. bypass pipeline; 21. bypass gas pipeline; 211. flow pressure detector; 22. input end; 221. intake valve; 222. hose; 223. liquefied gas tank; 23. output end; 231. compression pump; 232. gas storage tank; 3. connector; 31. card shell; 311. card slot; 32. sealing gasket; 33. protective pad; 34. bolt. DETAILED DESCRIPTION

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0023] The embodiment of the present application provides an online replacement system for a gas flow main, thereby solving the problem that the traditional replacement method requires stopping the use of the pipeline, causing shutdowns and production stops, affecting production efficiency, and failing to ensure the continuity and stability of production; temporary blocking measures can temporarily alleviate the problem, but cannot fundamentally eliminate the safety hazard, and achieves the replacement of the gas flow main while ensuring production, thereby eliminating the safety hazard.

[0024] The embodiment of the invention discloses an online replacement system for a gas flow main pipe.

[0025] According to the attached Figure 1-6As shown, it includes a main pipeline 1, a bypass pipeline 2 and a connector 3, the bypass pipeline 2 is located outside the main pipeline 1, and the outsides of the main pipeline 1 and the bypass pipeline 2 are sleeved with the connector 3, and it is characterized in that the main pipeline 1 includes a modular gas pipeline 11 and a main pipeline ball valve 12, the main pipeline ball valve 12 is located outside the modular gas pipeline 11, and the modular gas pipeline 11 is provided with a plurality of them, and a docking flange is provided outside the modular gas pipeline 11, and the docking flange is located at both ends of the modular gas pipeline 11; The bypass pipeline 2 includes a bypass gas pipe 21 and an input end 22. The input end 22 is located outside the bypass gas pipe 21. The bypass gas pipe 21 is provided with multiple bypass gas pipes. The bypass gas pipe 21 is provided with a docking flange like the modular gas pipe 11. The docking flanges are located at both ends of the bypass gas pipe 21.

[0026] A maintenance ball valve 14 is provided, and the maintenance ball valve 14 can be connected to the bypass pipe 2. By closing the main pipeline ball valves 12 on both sides of the maintenance section and opening the maintenance ball valve 14 connected to the bypass pipe 2 to form a bypass, the main pipeline that is damaged or needs to be upgraded can be replaced without stopping production. This system can effectively reduce production stagnation caused by main pipeline maintenance or replacement, and improve production efficiency and economy; a bypass pipe 2 is provided, and by utilizing an air intake valve 221, a liquefied gas tank 223, a compression pump 231 and a gas storage tank 232, the liquefied gas tank 223 stores liquefied coal gas, and the compression pump 231 can compress the gas into the gas storage tank 232, so that the gas impurities in the bypass pipe 2 can be removed to ensure the purity of the coal gas flow in the pipe.

[0027] A plurality of main line ball valves 12 are provided. The main line ball valves 12 are located between two modular gas pipelines 11 , and the main line ball valves 12 are fixedly connected to the modular gas pipelines 11 .

[0028] The main pipeline 1 also includes a tee 13 and a maintenance ball valve 14. The maintenance ball valve 14 is located outside the tee 13. The tee 13 is located between two groups of modular gas pipes 11. The tee 13 is fixedly connected to the modular gas pipes 11, and the tee 13 is arranged between the main pipeline ball valves 12.

[0029] The inspection ball valve 14 is fixedly connected to the three-way pipe 13 . The inspection ball valve 14 is located outside the modular gas pipeline 11 and is not connected to the modular gas pipeline 11 .

[0030] Both ends of the main line ball valve 12 and the three-way pipe 13 are provided with docking flanges. The modular gas pipeline 11, the main line ball valve 12 and the three-way pipe 13 are arranged in sequence as follows: modular gas pipeline 11, three-way pipe 13, modular gas pipeline 11, main line ball valve 12, and the main line ball valve 12 and the three-way pipe 13 are located at both ends of the modular gas pipeline 11.

[0031] A plurality of bypass gas pipelines 21 are connected in series, and a flow pressure detector 211 is provided on the bypass gas pipeline 21 in the middle, and the flow pressure detector 211 is fixedly connected to the bypass gas pipeline 21 .

[0032] The input end 22 is located between the bypass gas pipe 21 and the inspection ball valve 14. The two ends of the input end 22 are fixedly provided with docking flanges. The input end 22 is fixedly connected to the inspection ball valve 14. An air intake valve 221 is provided on the outside of the input end 22. The other end of the air intake valve 221 is connected to a hose 222. The other end of the hose 222 is connected to a liquefied gas tank 223.

[0033] The bypass pipeline 2 also includes an output end 23, at both ends of which are fixedly provided with docking flanges, the output end 23 is fixedly connected to the bypass gas pipe 21, and the output end 23 is located on one side of the principle input end 22, the output end 23 is fixedly connected to the outside of the maintenance ball valve 14, and a compression pump 231 is fixedly connected to the outside of the output end 23, and the compression pump 231 is connected to the gas storage tank 232.

[0034] The connector 3 includes a card shell 31 and a sealing gasket 32. The sealing gasket 32 ​​is located on the inner side of the card shell 31. The card shell 31 is provided with two groups. A card slot 311 is provided on the inner side of the card shell 31. The sealing gasket 32 ​​is clamped on the inner side of the card slot 311. A protective pad 33 is provided on the outer side of the card shell 31. A bolt 34 is inserted into the inner side of the protective pad 33. The bolt 34 passes through the card shell 31.

[0035] The sealing gasket 32 ​​is sleeved on the outer side of the butt flange, and the clamping shell 31 is clamped on the outer side of the butt flange.

[0036] Working principle: First, the main pipeline 1 is inspected to determine the damaged part of the modular gas pipeline 11, and the damaged modular gas pipeline 11 is marked by design; Then, a bypass pipeline 2 is established, the input end 22 is connected to the inspection ball valve 14 before the main line ball valve 12 in front of the damaged modular gas pipeline 11, and the output end 23 is connected to the inspection ball valve 14 after the main line ball valve 12 behind the damaged modular gas pipeline 11, and the input end 22 and the output end 23 are connected by the bypass gas pipeline 21, and sealed by the connector 3; Then, connect the liquefied gas tank 223 to the air inlet valve 221, open the air inlet valve 221 and the liquefied gas tank 223 to inject gas into the bypass pipeline, and at the same time, open the compression pump 231 to extract air impurities in the bypass pipeline 2 and compress them into the gas storage tank 232, and perform this operation until the gas purity in the bypass pipeline 2 meets the standard; Finally, close the air intake valve 221 and the compression pump 231 to seal the bypass pipe 2, open the inspection ball valve 14 connected to the bypass pipe 2, and then close the main line ball valves 12 at both ends of the modular gas pipe 11 that needs to be repaired, so that the gas flow bypasses the damaged part and continues to be transported from the bypass pipe 2. Then replace the damaged modular gas pipe 11. After the replacement is completed, open the main line ball valve 12 to make the main pipeline 1 unobstructed, close the inspection ball valve 14, and perform a sealing test on the connection of the replaced modular gas pipe 11 to ensure that there is no leakage.

[0037] A maintenance ball valve 14 is provided, and the maintenance ball valve 14 can be connected to the bypass pipe 2. By closing the main pipeline ball valves 12 on both sides of the maintenance section and opening the maintenance ball valve 14 connected to the bypass pipe 2 to form a bypass, the main pipeline that is damaged or needs to be upgraded can be replaced without stopping production. This system can effectively reduce production stagnation caused by main pipeline maintenance or replacement, and improve production efficiency and economy; a bypass pipe 2 is provided, and by utilizing an air intake valve 221, a liquefied gas tank 223, a compression pump 231 and a gas storage tank 232, the liquefied gas tank 223 stores liquefied coal gas, and the compression pump 231 can compress the gas into the gas storage tank 232, so that the gas impurities in the bypass pipe 2 can be removed to ensure the purity of the coal gas flow in the pipe.

[0038] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas flow main online replacement system, comprising a main pipeline (1), a bypass pipeline (2) and a connector (3), characterized in that: The bypass pipeline (2) is located outside the main pipeline (1), and the outsides of the main pipeline (1) and the bypass pipeline (2) are both sleeved with connecting pieces (3); The main pipeline (1) comprises a modular gas pipeline (11) and a main pipeline ball valve (12), wherein the main pipeline ball valve (12) is located outside the modular gas pipeline (11), and the modular gas pipeline (11) is provided with a plurality of them. A docking flange is provided outside the modular gas pipeline (11), and the docking flange is located at both ends of the modular gas pipeline (11); The bypass pipeline (2) comprises a bypass gas pipeline (21) and an input end (22). The input end (22) is located outside the bypass gas pipeline (21). A plurality of bypass gas pipelines (21) are provided. Like the modular gas pipeline (11), the bypass gas pipeline (21) is provided with a docking flange. The docking flanges are located at both ends of the bypass gas pipeline (21).

2. The on-line replacement system for gas flow main pipe according to claim 1, characterized in that: A plurality of main line ball valves (12) are provided, and the main line ball valves (12) are located between two modular gas transmission pipes (11), and the main line ball valves (12) are fixedly connected to the modular gas transmission pipes (11).

3. The on-line replacement system for gas flow main pipe according to claim 1, characterized in that: The main pipeline (1) further comprises a three-way pipe (13) and a maintenance ball valve (14), wherein the maintenance ball valve (14) is located outside the three-way pipe (13), the three-way pipe (13) is located between two groups of modular gas pipelines (11), the three-way pipe (13) is fixedly connected to the modular gas pipelines (11), and the three-way pipe (13) is arranged between the main pipeline ball valves (12).

4. The on-line replacement system for gas flow main pipe according to claim 3, characterized in that: The inspection ball valve (14) is fixedly connected to the three-way pipe (13); the inspection ball valve (14) is located outside the modular gas transmission pipe (11) and is not connected to the modular gas transmission pipe (11).

5. The on-line replacement system for gas flow main pipe according to claim 3, characterized in that: Both ends of the main line ball valve (12) and the three-way pipe (13) are provided with docking flanges. The modular gas transmission pipe (11), the main line ball valve (12) and the three-way pipe (13) are arranged in sequence: modular gas transmission pipe (11), three-way pipe (13), modular gas transmission pipe (11), main line ball valve (12). The main line ball valve (12) and the three-way pipe (13) are located at both ends of the modular gas transmission pipe (11).

6. The on-line replacement system for gas flow main pipe according to claim 1, characterized in that: A plurality of the bypass gas supply pipes (21) are connected in series, and a flow pressure detector (211) is provided on the bypass gas supply pipe (21) located in the middle, and the flow pressure detector (211) is fixedly connected to the bypass gas supply pipe (21).

7. The on-line replacement system for gas flow main pipe according to claim 1, characterized in that: The input end (22) is located between the bypass gas transmission pipe (21) and the inspection ball valve (14); two ends of the input end (22) are fixedly provided with docking flanges; the input end (22) is fixedly connected to the inspection ball valve (14); an air intake valve (221) is provided outside the input end (22); the other end of the air intake valve (221) is connected to a hose (222); the other end of the hose (222) is connected to a liquefied gas tank (223).

8. The on-line replacement system for gas flow main pipe according to claim 1, characterized in that: The bypass pipeline (2) further comprises an output end (23), both ends of which are fixedly provided with docking flanges, the output end (23) is fixedly connected to the bypass gas transmission pipe (21), and the output end (23) is located on one side of the principle input end (22), the output end (23) is fixedly connected to the outside of the inspection ball valve (14), the outside of the output end (23) is fixedly connected to a compression pump (231), and the compression pump (231) is connected to a gas storage tank (232).

9. The on-line replacement system for gas flow main pipe according to claim 1, characterized in that: The connecting member (3) comprises a card shell (31) and a sealing gasket (32), wherein the sealing gasket (32) is located inside the card shell (31), and the card shell (31) is provided with two groups. A card slot (311) is provided inside the card shell (31), and the sealing gasket (32) is clamped inside the card slot (311). A protective pad (33) is provided outside the card shell (31), and a bolt (34) is inserted inside the protective pad (33), and the bolt (34) passes through the card shell (31).

10. The on-line replacement system for gas flow main pipe according to claim 9, characterized in that: The sealing gasket (32) is sleeved on the outside of the docking flange, and the clamping shell (31) is clamped on the outside of the docking flange.

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