An industrial gas pipeline isolation device

Abstract

This application provides an industrial gas pipeline isolation device, relating to the technical field of gas pipeline isolation devices. It includes a gas pipeline, a PLC control system, a safety interlock component, a remote control component, a venting component, and a liquid level monitoring and water supply component; a water seal is installed within the gas pipeline. This device improves the reliability of the electric butterfly valve and water seal isolation combination, reduces production costs for industrial enterprises, and effectively reduces the accident rate. The device employs automated control, avoiding the possibility of accidents caused by human error and inadequate monitoring. The first and second electric gate valves provide dual protection for the water supply system, reducing energy costs. The safety valve and the first electric gate valve in this device form a safety pressure relief device, fundamentally preventing gas leakage accidents caused by water seal rupture. The explosion-proof camera and level gauge in this device automatically manage the water seal level, providing dual monitoring of the water seal level and greatly reducing safety risks.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal gas pipeline isolation devices, in particular to an industrial coal gas pipeline isolation device. BACKGROUND

[0002] The traditional electric butterfly valve + water seal isolation method used in industrial enterprise coal gas pipelines has the defects that the electric butterfly valve cannot be closed tightly, personnel need to be on duty in the coal gas dangerous area for 24 hours to maintain the effective height of the water seal, and once the effective height of the water seal cannot be maintained or the pipe network pressure abnormally increases, the pipeline gas will break through the water seal on the pressure side to reach the maintenance isolation area, causing personal injury. Through analysis of similar accidents in the past, maintaining the effective water level of the water seal and timely and safely relieving the pressure exceeding the water seal capacity in the abnormal state of the pipe network are the keys to engineering technical measures.

[0003] At present, there is no large-diameter coal gas pipeline isolation device with safety interlocking function and automatic safety emergency disposal function in the domestic industry. The traditional electric butterfly valve + water seal isolation device has the defects that the electric butterfly valve frequently operates during use, causing the valve to be unable to be closed tightly and causing leakage, and the water seal in the water filling state is in a long-term pressure-bearing state, which will cause the isolation device to fail once the water level of the water seal cannot be maintained or the pipe network abnormally increases in pressure, and then cause a large amount of gas leakage, which is prone to cause heavy and major production safety accidents. In addition, during the isolation of the coal gas water seal, the overflow outlet of the overflow drain is full of overflow for a long time, causing a large amount of industrial water to be wasted and increasing the water treatment cost of the industrial enterprise. SUMMARY

[0004] The purpose of the present application is to provide an industrial coal gas pipeline isolation device with safety relief pressure and liquid level monitoring small flow water replenishment function, which improves the job efficiency of the industrial enterprise, improves the reliability of the electric butterfly valve and water seal isolation combination, adopts automatic control, avoids the possibility of accidents caused by personnel misoperation and monitoring failure, reduces energy costs, automatically relieves pressure, essentially avoids the occurrence of water seal breakthrough gas leakage accidents, double-monitors the water seal liquid level, ensures its safety and effectiveness, and greatly reduces the beneficial effects of safety risks, to solve the problems raised in the background technology.

[0005] To achieve the above purpose, the present application provides the following technical scheme:

[0006] An industrial coal gas pipeline isolation device, comprising:

[0007] A coal gas pipeline, a water seal is arranged in the coal gas pipeline;

[0008] A PLC control system;

[0009] A safety interlocking assembly connected to the coal gas pipeline and connected with the PLC control system;

[0010] remote control assembly;

[0011] diffusion assembly, the diffusion assembly is connected to the gas pipeline and connected with the PLC control system;

[0012] liquid level monitoring and water replenishing assembly, the liquid level monitoring and water replenishing assembly is connected with the gas pipeline and the safety interlocking assembly respectively and connected with the PLC control system.

[0013] As a further scheme of the present application, the safety interlocking assembly comprises:

[0014] electric butterfly valve, the electric butterfly valve is connected to the gas pipeline;

[0015] main pipe electric gate valve, the main pipe electric gate valve is connected with the liquid level monitoring and water replenishing assembly;

[0016] bypass electric gate valve, the bypass electric gate valve is connected with the liquid level monitoring and water replenishing assembly.

[0017] As a further scheme of the present application, the remote control assembly comprises:

[0018] explosion-proof camera;

[0019] overflow drain, the explosion-proof camera is arranged at one side of the overflow drain;

[0020] downcomer, the downcomer is connected to the gas pipeline and connected with the gas pipeline;

[0021] downcomer primary valve;

[0022] downcomer secondary valve, the downcomer primary valve, the downcomer secondary valve and the overflow drain are connected to the downcomer in sequence.

[0023] As a further scheme of the present application, the diffusion assembly comprises:

[0024] diffusion pipe, the diffusion pipe is connected to the gas pipeline;

[0025] diffusion detection hole, the diffusion detection hole is arranged at one side of the gas pipeline and connected with the diffusion pipe;

[0026] diffusion gate valve, the diffusion gate valve is arranged at one side of the diffusion pipe and connected with the diffusion pipe;

[0027] safety valve, the safety valve is arranged at one side of the electric gate valve and connected with the electric gate valve;

[0028] first electric gate valve, the first electric gate valve is arranged at one side of the gas pipeline and connected with the diffusion pipe.

[0029] As a further embodiment of the present invention: two sets of the venting detection hole, venting gate valve, and venting pipe are respectively provided, located on one side of the water seal, and used to detect the pressure in the gas pipeline and vent the gas in the gas pipeline.

[0030] As a further aspect of the present invention: the opening pressure of the safety valve is set to 1.12 times the working pressure of the gas pipeline, and less than the working pressure of the water seal; when the water seal is full of water and the electric butterfly valve is not tightly closed and there is leakage, the electric butterfly valve shaft head is not fully closed, and a signal is fed back to the PLC control system, and the PLC control system controls the electric gate valve to open; when the gas pipeline pressure gradually increases, when the gas pipeline pressure increases to the opening pressure of the safety valve, the safety valve opens and releases the gas.

[0031] As a further embodiment of the present invention: the liquid level monitoring and water replenishment component includes:

[0032] A water inlet pipe is connected to the gas pipeline; both the bypass electric gate valve and the main electric gate valve are connected to the water inlet pipe.

[0033] Second electric gate valve;

[0034] The check valve, the second electric gate valve, and the check valve are all connected to the water supply pipe;

[0035] A level gauge, one end of which is located inside the water seal and connected to the gas pipeline, and the other end of which extends out of the gas pipeline.

[0036] As a further aspect of the present invention: it includes a drainage component, the drainage component comprising:

[0037] A downcomer is connected to and communicates with the gas pipeline.

[0038] Downcomer primary valve;

[0039] Secondary valve for downcomer;

[0040] The drain valve, the primary valve of the downcomer, the secondary valve of the downcomer, and the drain valve are connected in sequence to the downcomer.

[0041] Compared with the prior art, the beneficial effects of the present invention are:

[0042] 1. This device integrates safe pressure relief and liquid level monitoring with small-flow water replenishment functions, forming an automated, integrated, and unmanned industrial large-diameter gas pipeline isolation device.

[0043] 2. This device solves the problem of monitoring water seal levels and manually replenishing water when personnel are exposed to hazardous working environments for extended periods. Under the same existing technical conditions, the use of this invention can effectively improve the work efficiency of industrial enterprises, enhance the reliability of electric butterfly valves and water seal isolation combinations, reduce industrial production costs, and effectively reduce the accident rate.

[0044] 3. This device adopts automated control, which inherently controls the risk points. Operators monitor and perform remote operations from the main control room, avoiding the possibility of accidents caused by human error and inadequate monitoring. Under the existing process conditions, the first electric gate valve and the second electric gate valve realize the dual protection function of the water supply system, preventing continuous large-volume water replenishment due to the failure of a single electric gate valve, and reducing energy costs.

[0045] 4. The safety valve and the first electric gate valve in this device form a safety pressure relief device, which provides a safety warning for overpressure in the gas pipeline and performs automatic pressure relief, thus fundamentally avoiding the occurrence of gas leakage accidents caused by water seal rupture.

[0046] 5. The explosion-proof camera and level gauge in this device enable automatic management of the water seal level, providing dual monitoring of the water seal level to ensure its safety and effectiveness, and greatly reduce safety risks. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0048] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0049] Figure 1 This is a schematic diagram of an industrial gas pipeline isolation device provided in an embodiment of this application.

[0050] Figure 2 for Figure 1 A magnified view of part A in the image.

[0051] Figure 3 for Figure 2 A magnified view of part B in the image.

[0052] Markings in the image:

[0053] 1. Gas flow direction; 2. Electric butterfly valve; 3. Venting detection port; 4. Venting gate valve; 5. Venting pipe; 6. Safety valve; 7. First electric gate valve; 8. Water inlet pipe; 9. Second electric gate valve; 10. Check valve; 11. Bypass electric gate valve; 12. Water flow direction; 13. Main electric gate valve; 14. Drainage device; 15. Downcomer secondary valve; 16. Downcomer primary valve; 17. Overflow drain; 18. Level gauge; 19. Explosion-proof camera; 20. Water seal; 21. Gas pipeline. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0055] Please refer to the attached document. Figures 1 to 3 This application provides an industrial gas pipeline 21 isolation device, comprising:

[0056] Gas pipeline 21, the gas flow direction 1 in gas pipeline 21 is as shown in the attached figure. Figure 1 As shown, a water seal 20 is provided inside the gas pipeline 21. The middle part of the gas pipeline 21 is V-shaped and forms a V-shaped cavity. The water seal 20 is located inside the V-shaped cavity.

[0057] PLC control system;

[0058] Safety interlock component, the safety interlock component is connected to the gas pipeline 21 and connected to the PLC control system;

[0059] Remote control components;

[0060] The venting assembly is connected to the gas pipeline 21 and is also connected to the PLC control system.

[0061] The liquid level monitoring and water replenishment component is connected to the gas pipeline 21, the safety interlock component, and the PLC control system.

[0062] This device integrates safe pressure relief and low-flow water replenishment functions, forming an automated, integrated, and unmanned isolation device for large-diameter gas pipelines in industrial enterprises. This device solves the problem of monitoring the water level of the water seal 20 and manually replenishing water during prolonged exposure to hazardous working environments. Under the same existing technological conditions, adopting this invention can effectively improve the operational efficiency of industrial enterprises, enhance the reliability of the electric butterfly valve 2 and the water seal 20 isolation combination, reduce industrial production costs, and effectively reduce the accident rate. This device employs automated control, providing inherent safety control for risk points. Operators monitor and perform remote operations from the main control room, avoiding the possibility of accidents caused by human error or inadequate monitoring. Under existing technological conditions, the first electric gate valve 7 and the second electric gate valve 9 provide dual protection for the water supply system, preventing continuous large-flow water replenishment due to a single electric gate valve failure, thus reducing energy costs. In this device, safety valve 6 and the first electric gate valve 7 form a safety pressure relief device, which provides a safety warning for overpressure in the gas pipeline 21 and performs automatic pressure relief, effectively preventing gas leakage accidents caused by the rupture of the water seal 20. The explosion-proof camera 19 and the level gauge 18 in this device automatically manage the water seal 20 level, providing dual monitoring to ensure its safety and effectiveness, and greatly reducing safety risks.

[0063] In a preferred embodiment of the present invention, the safety interlock component includes:

[0064] Electric butterfly valve 2 is fixedly connected to the gas pipeline 21. The opening and closing status of the electric butterfly valve 2 and the water seal 20 realize the interlocking function of the gas supply water pipe 8.

[0065] The main electric gate valve 13 is fixedly connected to the liquid level monitoring and water replenishment assembly.

[0066] Bypass electric gate valve 11 is fixedly connected to the liquid level monitoring and water replenishment component.

[0067] In a preferred embodiment of the present invention, the remote control component includes:

[0068] Explosion-proof camera 19;

[0069] An explosion-proof camera 19 is installed on one side of the overflow drain 17 and monitors the overflow drain 17 in real time.

[0070] The downcomer is fixedly connected to the gas pipeline 21 and is connected to the gas pipeline 21.

[0071] Downcomer primary valve 16;

[0072] The downcomer secondary valve 15, downcomer primary valve 16, downcomer secondary valve 15, and overflow drain 17 are sequentially fixedly connected to the downcomer.

[0073] In a preferred embodiment of the present invention, the venting component includes:

[0074] Vent pipe 5 is connected to gas pipeline 21;

[0075] Venting detection hole 3 is located on one side of gas pipeline 21 and is connected to vent pipe 5;

[0076] Venting gate valve 4 is located on one side of venting pipe 5 and is fixedly connected to venting pipe 5.

[0077] Safety valve 6 is located on one side of the electric gate valve and is fixedly connected to the electric gate valve.

[0078] The first electric gate valve 7 is located on one side of the gas pipeline 21 and is fixedly connected to the vent pipe 5.

[0079] Among them, there are two sets of vent detection holes 3, vent gate valves 4 and vent pipes 5, which are respectively located on one side of the water seal 20, and detect the pressure in the gas pipeline 21 and vent the gas in the gas pipeline 21.

[0080] This device achieves safe pressure relief through a venting component. Specifically, the opening pressure of safety valve 6 is set to 1.12 times the working pressure of gas pipeline 21, and less than the working pressure of water seal 20. When water seal 20 is full of water and electric butterfly valve 2 is not fully closed, causing leakage, a signal indicating that the electric butterfly valve 2 shaft is not fully closed is fed back to the remote PLC control system. The PLC control system then controls the first electric gate valve 7 to open. As the pressure in gas pipeline 21 gradually increases, until it reaches the opening pressure of safety valve 6, safety valve 6 opens, releasing gas and completely eliminating the risk of gas leakage caused by the continuous increase in pressure in gas pipeline 21 puncturing water seal 20, thus ensuring production safety.

[0081] In a preferred embodiment of the present invention, the liquid level monitoring and water replenishment component includes:

[0082] Water supply pipe 8 is fixedly connected to gas pipeline 21; bypass electric gate valve 11 and main electric gate valve 13 are both fixedly connected to water supply pipe 8; the water flow direction 12 in water supply pipe 8 is as shown in the attached figure. Figure 1 As shown;

[0083] Second electric gate valve 9;

[0084] The check valve 10, the second electric gate valve 9 and the check valve 10 are all fixedly connected to the water supply pipe 8;

[0085] The level gauge 18 has one end located inside the water seal 20 and is fixedly connected to the gas pipeline 21, while the other end extends out of the gas pipeline 21.

[0086] This device achieves low-flow water replenishment through a liquid level monitoring and replenishment component. Specifically, when the electric butterfly valve 2 is closed, feedback is sent to the remote PLC control system. The PLC control system controls the main electric gate valve 13 and the second electric gate valve 9 to open, allowing production water to be injected into the V-type water seal 20 via the check valve 10 and the second electric gate valve 9. When the explosion-proof camera 19 monitors continuous overflow from the overflow drain 17, the explosion-proof camera 19 sends a signal back to the remote PLC control system. Simultaneously, the liquid level gauge 18 on the water seal 20 sends liquid level information back to the remote PLC control system. When both the liquid level information and the video information meet safety standards, the control system controls the main electric gate valve 13 to close and the bypass electric gate valve 11 to open, continuously replenishing water at a low flow rate to ensure the high reliability of the water seal 20 and reduce energy costs. Otherwise, a large volume of water is continuously injected.

[0087] A preferred embodiment of the present invention includes a drainage component, which comprises:

[0088] The downcomer is fixedly connected to the gas pipeline 21 and is connected to the gas pipeline 21.

[0089] Downcomer primary valve 16;

[0090] Downcomer secondary valve 15;

[0091] The drain valve 14, the downcomer primary valve 16, the downcomer secondary valve 15, and the drain valve 14 are sequentially fixedly connected to the downcomer; by opening the downcomer primary valve 16 and the downcomer secondary valve 15, the water in the V-shaped water seal 20 is discharged through the downcomer and the drain valve 14.

[0092] This device integrates safe pressure relief and low-flow water replenishment functions, forming an automated, integrated, and unmanned isolation device for large-diameter gas pipelines in industrial enterprises. This device solves the problem of monitoring the water level of the water seal 20 and manually replenishing water during prolonged exposure to hazardous working environments. Under the same existing technological conditions, adopting this invention can effectively improve the operational efficiency of industrial enterprises, enhance the reliability of the electric butterfly valve 2 and the water seal 20 isolation combination, reduce industrial production costs, and effectively reduce the accident rate. This device employs automated control, providing inherent safety control for risk points. Operators monitor and perform remote operations from the main control room, avoiding the possibility of accidents caused by human error or inadequate monitoring. Under existing technological conditions, the first electric gate valve 7 and the second electric gate valve 9 provide dual protection for the water supply system, preventing continuous large-flow water replenishment due to a single electric gate valve failure, thus reducing energy costs. In this device, safety valve 6 and the first electric gate valve 7 form a safety pressure relief device, which provides a safety warning for overpressure in the gas pipeline 21 and performs automatic pressure relief, effectively preventing gas leakage accidents caused by the rupture of the water seal 20. The explosion-proof camera 19 and the level gauge 18 in this device automatically manage the water seal 20 level, providing dual monitoring to ensure its safety and effectiveness, and greatly reducing safety risks.

[0093] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0094] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0095] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An industrial gas duct partitioning device, characterized by, The utility model relates to a coal gas pipeline safety system, which comprises: a coal gas pipeline with a water seal therein; a PLC control system; a safety interlocking assembly connected to the coal gas pipeline and the PLC control system; the safety interlocking assembly comprises an electric butterfly valve connected to the coal gas pipeline; a remote control assembly; a diffusion assembly connected to the coal gas pipeline and the PLC control system; the diffusion assembly comprises a diffusion pipe, a first electric gate valve and a safety valve, the diffusion pipe is connected to the coal gas pipeline, the first electric gate valve is arranged on one side of the coal gas pipeline and connected to the diffusion pipe, and the safety valve is arranged on one side of the first electric gate valve and connected to the first electric gate valve; a liquid level monitoring and water replenishing assembly connected to the coal gas pipeline, the safety interlocking assembly and the PLC control system; when the water seal is filled with water and the electric butterfly valve is not tightly closed and there is a leakage, a signal that the shaft head of the electric butterfly valve is not closed to the right position is fed back to the PLC control system, the PLC control system controls the first electric gate valve to be opened, when the pressure of the coal gas pipeline gradually increases, the pressure of the coal gas pipeline increases to the opening pressure of the safety valve, the safety valve is opened, and the coal gas is diffused.

2. A device according to claim 1, characterised in that The safety interlocking assembly further comprises: a main pipe electric gate valve connected to the liquid level monitoring and water replenishing assembly; a bypass electric gate valve connected to the liquid level monitoring and water replenishing assembly.

3. A device according to claim 1, wherein The remote control assembly comprises: an explosion-proof camera; an overflow drain, the explosion-proof camera is arranged on one side of the overflow drain; a downcomer connected to the coal gas pipeline and connected to the coal gas pipeline; a downcomer primary valve; a downcomer secondary valve, the downcomer primary valve, the downcomer secondary valve and the overflow drain are sequentially connected to the downcomer.

4. A device according to claim 1, wherein The diffusion assembly further comprises: a diffusion detection hole arranged on one side of the coal gas pipeline and connected to the diffusion pipe; a diffusion gate valve arranged on one side of the diffusion pipe and connected to the diffusion pipe.

5. A device according to claim 4, wherein The diffusion detection hole, the diffusion gate valve and the diffusion pipe are respectively provided with two groups and arranged on one side of the water seal, and the pressure in the coal gas pipeline and the coal gas in the diffusion coal gas pipeline are detected.

6. A device according to claim 5, wherein The opening pressure of the safety valve is set to 1.12 times of the working pressure of the coal gas pipeline and less than the working pressure of the water seal.

7. A device according to claim 2, wherein The liquid level monitoring and water replenishing assembly comprises: a water inlet pipe connected to the coal gas pipeline; the bypass electric gate valve and the main pipe electric gate valve are both connected to the water inlet pipe; a second electric gate valve; a check valve, the second electric gate valve and the check valve are both connected to the water inlet pipe; a liquid level meter, one end of the liquid level meter is arranged in the water seal and connected to the coal gas pipeline, and the other end of the liquid level meter extends out of the coal gas pipeline.

8. A device according to claim 1, wherein The utility model further comprises a water drainage assembly, which comprises: a downcomer connected to the coal gas pipeline and connected to the coal gas pipeline; a downcomer primary valve; a downcomer secondary valve; a water drainage overflow drain, the downcomer primary valve, the downcomer secondary valve and the water drainage overflow drain are sequentially connected to the downcomer.

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