U-shaped water seal device, operating method and puncture treatment method

Abstract

This invention belongs to the field of pipeline water seal technology, and discloses a U-shaped water seal device, its operation method, and a puncture treatment method. The U-shaped water seal device includes a U-shaped pipe, a water reservoir, a drain pipe, a water supply component, and an overflow pipe. The U-shaped pipe opens upwards; the water reservoir is lower than the U-shaped pipe; the drain pipe connects the bottom of the U-shaped pipe and the water reservoir, with a discharge valve at one end of the drain pipe connected to the U-shaped pipe and an inlet valve at the other end; the water supply component includes a first branch pipe and a second branch pipe, the first branch pipe connecting to the side of the U-shaped pipe, with a first shut-off valve at the end of the first branch pipe connected to the U-shaped pipe, and the second branch pipe connecting to the drain pipe between the discharge valve and the inlet valve, with a second shut-off valve on the second branch pipe; the overflow pipe connects to the water reservoir and extends upwards from the water reservoir, with a low-level overflow port and a high-level overflow port, and a low-level shut-off valve at the low-level overflow port.

Description

Technical Field

[0001] This invention relates to the field of pipeline water seal technology, and in particular to a U-shaped water seal device, its operation method, and a method for handling puncture. Background Technology

[0002] U-shaped water seals are a common shut-off device used on gas pipelines. Together with gas valves, they are used to cut off the gas in the pipeline for a short period of time.

[0003] In existing technology, a U-shaped water seal includes an upper U-shaped tube and a lower water seal container. The U-shaped water seal has two operating states: an aeration state and a water-flow state. In the aeration state, the U-shaped tube is aerated, and the water seal container is water-sealed. In the water-flow state, both the U-shaped tube and the water seal container are water-flowing.

[0004] When the gas is being supplied, significant pressure fluctuations within the pipe can cause the water seal container to rapidly deplete, resulting in insufficient liquid level and potentially rupture of the water seal, leading to gas leakage. To address gas leaks, water is often injected into the water seal container through the side of a U-shaped pipe. However, water can easily accumulate inside the U-shaped pipe, obstructing flow. In severe cases, a water seal can form within the U-shaped pipe, cutting off the gas supply and causing the gas user to suddenly shut off their gas supply, resulting in a gas accident and a secondary accident. Summary of the Invention

[0005] One objective of this invention is to provide a U-shaped water seal device that facilitates both air and water flow, preventing the formation of a water seal inside the U-shaped tube during the breakdown process, which would affect the passage of gas through the U-shaped tube.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] U-shaped water seal device, including:

[0008] A U-shaped tube with its opening facing upwards;

[0009] A water storage tank lower than the U-shaped pipe;

[0010] A drain pipe is connected between the bottom of the U-shaped tube and the water reservoir. One end of the drain pipe connected to the U-shaped tube is equipped with a discharge valve, and the other end of the drain pipe connected to the water reservoir is equipped with an inlet valve.

[0011] The water supply assembly includes a first branch pipe and a second branch pipe. The first branch pipe is connected to the side of the U-shaped pipe, and a first shut-off valve is provided on the end of the first branch pipe connected to the U-shaped pipe. The second branch pipe is connected to a drain pipe between the discharge valve and the inlet valve, and a second shut-off valve is provided on the second branch pipe.

[0012] An overflow pipe is connected to the water storage tank and extends upward from the water storage tank. The overflow pipe is equipped with a low-level overflow port and a high-level overflow port. The high-level overflow port is lower than the top of the U-shaped pipe and higher than the bottom of the U-shaped pipe. The low-level overflow port is lower than the bottom of the U-shaped pipe and higher than the water storage tank. A low-level shut-off valve is provided at the low-level overflow port.

[0013] Another objective of this invention is to provide a method for operating a U-shaped water seal device to achieve a water-flow state and cut off the flow of coal gas.

[0014] To achieve this objective, the present invention adopts the following technical solution:

[0015] The operating method of the U-shaped water seal device, based on the above-mentioned U-shaped water seal device, includes the following steps:

[0016] The second shut-off valve is closed, the first shut-off valve is open, the discharge valve and the inlet valve are open, and the low-position shut-off valve is closed, so that the U-tube is in a water-flow state, the U-tube is water-sealed, and the water tank, drain pipe and overflow pipe form a water seal, and water overflows from the high-position overflow port.

[0017] Another objective of this invention is to provide a method for operating a U-shaped water seal device, which enables the gas to pass smoothly through the U-shaped pipe and the drain pipe to be in a water seal state.

[0018] To achieve this objective, the present invention adopts the following technical solution:

[0019] The operating method of the U-shaped water seal device, based on the above-mentioned U-shaped water seal device, includes the following steps:

[0020] The second shut-off valve is closed, the first shut-off valve is open, the discharge valve and the inlet valve are open, and the low-position shut-off valve is open, so that the U-tube is in a venting state, and the water tank, drain pipe and overflow pipe form a water seal, and water overflows from the low-position overflow port.

[0021] Another objective of this invention is to provide a method for handling the breakdown of a U-shaped water seal device, so as to avoid the formation of a water seal inside the U-shaped tube during the process of handling the breakdown and restoring the gas flow, which would affect the passage of gas through the U-shaped tube and cause a secondary accident.

[0022] To achieve this objective, the present invention adopts the following technical solution:

[0023] A method for handling the breakdown of a U-shaped water seal device, implemented based on the aforementioned U-shaped water seal device, wherein the breakdown occurs while the U-shaped water seal device is in a ventilated state, including:

[0024] Step S1: Close the drain valve and disconnect the U-tube from the drain pipe;

[0025] Step S2: Close the first shut-off valve to stop water injection into the U-tube, open the second shut-off valve, and supply water to the water tank through the second branch pipe until water overflows from the low-level overflow port. Then, stop water injection through the second branch pipe.

[0026] Step S3: Close the second shut-off valve and open the discharge valve;

[0027] Step S4: Open the first shut-off valve.

[0028] As an optional embodiment of the above-mentioned U-shaped water seal device breakdown treatment method, the U-shaped water seal device further includes a normal drain pipe and a water seal state regulating pipe. Both the normal drain pipe and the water seal state regulating pipe are connected to the low-level overflow port. The normal drain pipe is equipped with a leak-proof drainer and a normal pipe valve. Compared with the leak-proof drainer, the normal pipe valve is farther away from the drain end of the normal drain pipe. The water seal state regulating pipe is equipped with a low-level shut-off valve, and the overflow pipe is equipped with a high-level shut-off valve that is higher than the low-level overflow port and lower than the high-level overflow port. In step S, the low-level shut-off valve remains open. In steps S and S', the low-level shut-off valve remains closed, the normal pipe valve remains open, and the high-level shut-off valve remains closed.

[0029] As an optional embodiment of the above-mentioned U-shaped water seal device breakdown treatment method, the water supply assembly further includes a water supply pipe and a water replenishment pipe. The first branch pipe and the second branch pipe are both connected to the water supply pipe, and the first branch pipe and the second branch pipe are both connected to the water replenishment pipe. The water supply pipe is equipped with a water supply valve, and the water replenishment pipe is equipped with a water replenishment valve. The diameter of the water supply pipe is larger than the diameter of the water replenishment pipe. In step S2, the water supply valve is opened. In step S3, the water supply valve is closed. In step S4, the water replenishment valve is opened.

[0030] As an optional embodiment of the above-mentioned U-shaped water seal device breakdown handling method, the U-shaped water seal device further includes a level gauge installed on the overflow pipe and a leak alarm for detecting the gas concentration at the low-level overflow port and issuing an alarm. The level gauge is not lower than the low-level overflow port. The U-shaped water seal device breakdown handling method further includes: when the leak alarm issues an alarm and the level gauge indicates that the liquid level is lower than the preset liquid level value, steps S1 and S2 are executed sequentially; when the gas concentration detected by the leak alarm is lower than the preset concentration value, steps S3 and S4 are executed sequentially.

[0031] As an optional embodiment of the above-mentioned U-shaped water seal device breakdown treatment method, the U-shaped water seal device also includes a remote work platform. The remote work platform can receive the information collected by the leak alarm and the level gauge, and can remotely control the discharge valve, the inlet valve, the first shut-off valve and the second shut-off valve.

[0032] As an optional embodiment of the above-mentioned U-shaped water seal device breakdown treatment method, the discharge valve, the inlet valve, the first shut-off valve and the second shut-off valve are all electrically controlled explosion-proof valves.

[0033] As an optional embodiment of the above-mentioned method for handling the breakdown of the U-shaped water seal device, the leakage alarm is a CO alarm.

[0034] Beneficial effects:

[0035] When a water seal ruptures in a U-shaped water seal device under ventilation conditions, causing gas to leak from the overflow pipe, close the discharge valve to disconnect the connection between the U-shaped pipe and the drain pipe. This prevents gas from leaking outwards through the drain pipe and water tank from the overflow pipe, while allowing gas to continue flowing through the U-shaped pipe. Close the first shut-off valve to stop water supply to the U-shaped pipe, preventing the formation of a water seal and avoiding gas blockage, thus maintaining gas flow. Open the second shut-off valve, allowing the second branch pipe to supply water to the water tank until water overflows from the low-level overflow port, indicating that a water seal has been formed between the water tank, overflow pipe, and drain pipe. Close the second shut-off valve and open the discharge valve to restore the water seal effect of the water tank, overflow pipe, and drain pipe on the U-shaped pipe; open the first shut-off valve to restore the U-shaped water seal device to ventilation mode. Using the U-shaped water seal device provided by this invention, it is convenient to realize both air-permeable and water-permeable states. When the U-shaped water seal device is punctured and gas leakage occurs, the puncture treatment method of this invention can effectively prevent water accumulation in the U-shaped pipe, thereby keeping the gas in a conductive state and avoiding secondary accidents. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the U-shaped water seal device provided in an embodiment of the present invention;

[0037] Figure 2 This is a flowchart of the U-shaped water seal device breakdown treatment method provided in the embodiment of the present invention.

[0038] In the picture:

[0039] 1. Gas passage; 11. U-shaped pipe;

[0040] 2. Water storage container;

[0041] 3. Drain pipe; 31. Discharge valve; 32. Inlet valve;

[0042] 4. Water supply components; 41. First branch pipe; 411. First shut-off valve; 42. Second branch pipe; 421. Second shut-off valve; 43. Water supply pipe; 431. Water supply valve; 44. Water supply pipe; 441. Water supply valve;

[0043] 5. Overflow pipe; 51. High-level shut-off valve; 52. High-level drain pipe; 53. Normal drain pipe; 531. Leak-proof drainer; 532. Normal pipe valve; 54. Water seal status regulating pipe; 541. Low-level shut-off valve;

[0044] 6. Level gauge;

[0045] 7. Leakage alarm. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0047] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0050] like Figure 1 As shown, this embodiment provides a U-shaped water seal device, which includes a U-shaped pipe 11, a water reservoir 2, a drain pipe 3, a water supply component 4, and an overflow pipe 5.

[0051] Specifically, the U-shaped pipe 11 opens upwards and serves as part of the gas passage 1, allowing gas to pass through. The U-shaped pipe 11 can also be a V-shaped pipe, as long as it allows for drainage and gas conduction. The water reservoir 2 is located below the U-shaped pipe 11, and a drain pipe 3 connects the bottom of the U-shaped pipe 11 to the water reservoir 2. The overflow pipe 5 is connected to the water reservoir 2 and extends upwards from it. The overflow pipe 5 has a low-level overflow port and a high-level overflow port. The low-level overflow port is below the bottom of the U-shaped pipe 11 and above the water reservoir 2, ensuring that the U-shaped pipe 11 is in a ventilated state. The high-level overflow port is lower than the top of the U-shaped pipe 11 and higher than the bottom of the U-shaped pipe 11. A low-level shut-off valve 541 is provided at the low-level overflow port. When the low-level shut-off valve 541 is closed, water flows out from the high-level overflow port, so that the U-shaped pipe 11 is in a water-passing state. The U-shaped pipe 11 is water-sealed, and gas cannot pass through.

[0052] like Figure 1 As shown, the water supply assembly 4 includes a first branch pipe 41 and a second branch pipe 42. The first branch pipe 41 is connected to the side of the U-shaped pipe 11, and a first shut-off valve 411 is provided on the end of the first branch pipe 41 connected to the U-shaped pipe 11 to control the opening and closing of the first branch pipe 41. A drain valve 31 is provided on the end of the drain pipe 3 connected to the U-shaped pipe 11 to control the opening and closing of the drain pipe 3 and the U-shaped pipe 11. An inlet valve 32 is provided on the end of the drain pipe 3 connected to the water storage tank 2 to control the opening and closing of the drain pipe 3 and the water storage tank 2. The second branch pipe 42 is connected to the drain pipe 3 between the drain valve 31 and the inlet valve 32, and a second shut-off valve 421 is provided on the second branch pipe 42 to control the opening and closing of the second branch pipe 42 and the drain pipe 3.

[0053] The working principle of the U-shaped water seal device is as follows:

[0054] With the U-tube 11 in the ventilated state, the second shut-off valve 421 is closed, the first shut-off valve 411 is open, the discharge valve 31 and the inlet valve 32 are open, and the low-position shut-off valve 541 is open. At this time, the gas passes through the U-tube 11, and the first branch pipe 41 replenishes a small amount of water into the U-tube 11. The replenished water enters the U-tube 11, which facilitates the carrying of condensate in the gas into the drain pipe 3. The water reservoir 2, the drain pipe 3, and the overflow pipe 5 form a water seal, and the water overflows from the low-position overflow port, forming a dynamic balance with the replenished water in the first branch pipe 41 and the carried condensate.

[0055] With the U-tube 11 in a water-flow state, the second shut-off valve 421 is closed, the first shut-off valve 411 is open, the discharge valve 31 and the inlet valve 32 are open, and the low-position shut-off valve 541 is closed. A water seal is formed inside the U-tube 11, cutting off the gas supply. The first branch pipe 41 replenishes a small amount of water to the U-tube 11, and the water overflows from the high-position overflow port, forming a dynamic balance with the water replenishment from the first branch pipe 41.

[0056] When the U-shaped water seal device in the ventilated state experiences water seal rupture, causing gas to leak from the overflow pipe 5, close the discharge valve 31 to cut off the connection between the U-shaped pipe 11 and the drain pipe 3, preventing gas from leaking out of the overflow pipe 5 through the drain pipe 3 and the water tank 2, while allowing gas to continue flowing through the U-shaped pipe 11. Close the first shut-off valve 411 to stop water supply to the U-shaped pipe 11, preventing the formation of a water seal within the U-shaped pipe 11 and thus blocking the gas flow. Open the second shut-off valve 421, and the second branch pipe 42 supplies water to the water tank 2 until water overflows from the low-level overflow port, indicating that a water seal has been formed between the water tank 2, the overflow pipe 5, and the drain pipe 3. Close the second shut-off valve 421 and open the discharge valve 31, thereby restoring the water seal effect of the water tank 2, the overflow pipe 5, and the drain pipe 3 on the U-shaped pipe 11; open the first shut-off valve 411 to restore the U-shaped water seal device to the ventilated state.

[0057] This embodiment also provides a method for operating a U-shaped water seal device. Based on the above-mentioned implementation of the U-shaped water seal device, the water flow state of the U-shaped water seal device is realized, and the gas flow is cut off. The method for operating the U-shaped water seal device includes the following steps: the second shut-off valve 421 is closed, the first shut-off valve 411 is opened, the discharge valve 31 and the inlet valve 32 are opened, and the low-position shut-off valve 541 is closed, so that the U-shaped pipe 11 is in a water-flow state, the U-shaped pipe 11 is water-sealed, and the water storage 2, the drain pipe 3 and the overflow pipe 5 form a water seal, and the water overflows from the high-position overflow port.

[0058] This embodiment also provides a method for operating a U-shaped water seal device. Based on the above-described U-shaped water seal device, the device is in a ventilated state, allowing gas to pass smoothly through the U-shaped pipe 11, and the drain pipe 3 is in a water-sealed state. The method for operating the U-shaped water seal device includes the following steps: the second shut-off valve 421 is closed, the first shut-off valve 411 is opened, the discharge valve 31 and the inlet valve 32 are opened, and the low-position shut-off valve 541 is opened, so that the U-shaped pipe 11 is in a ventilated state, and the water storage tank 2, the drain pipe 3, and the overflow pipe 5 form a water seal, with water overflowing from the low-position overflow port.

[0059] This embodiment also provides a method for handling the breakdown of a U-shaped water seal device, so as to avoid the formation of a water seal inside the U-shaped pipe 11 during the process of handling the breakdown and restoring the gas flow, which would affect the passage of gas through the U-shaped pipe 11 and cause a secondary accident.

[0060] The method for handling U-shaped water seal device breakdown is based on the aforementioned U-shaped water seal device. The breakdown occurs when the U-shaped water seal device is in a ventilated state. Figure 2 As shown, the specific methods for handling the breakdown of the U-shaped water seal device include:

[0061] Step S1: Close the drain valve 31 to disconnect the connection between the U-shaped pipe 11 and the drain pipe 3;

[0062] Step S2: Close the first shut-off valve 411 to stop water injection into the U-tube 11, open the second shut-off valve 421, and supply water to the water storage tank 2 through the second branch pipe 42 until water overflows from the low-level overflow port, and then stop water injection through the second branch pipe 42.

[0063] Step S3: Close the second shut-off valve 421 and open the discharge valve 31;

[0064] Step S4: Open the first shut-off valve 411.

[0065] The U-shaped water seal device rupture handling method provided in this embodiment involves closing the discharge valve 31 to cut off the connection between the U-shaped pipe 11 and the drain pipe 3, preventing gas from leaking out through the drain pipe 3 and the water tank 2 from the overflow pipe 5, while allowing gas to continue flowing through the U-shaped pipe 11. The first shut-off valve 411 is closed to stop water supply to the U-shaped pipe 11, preventing the formation of a water seal within the U-shaped pipe 11 and thus preventing gas blockage. The second shut-off valve 421 is opened, and the second branch pipe 42 supplies water to the water tank 2 until water overflows from the low-level overflow port, indicating that a water seal has been formed between the water tank 2, the overflow pipe 5, and the drain pipe 3. The second branch pipe 42 stops supplying water. During this process, the water flow is cut off by the drain valve and will not overflow into the U-shaped pipe 11. Close the second shut-off valve 421 and open the discharge valve 31 to restore the water seal effect of the water reservoir 2, overflow pipe 5 and drain pipe 3 on the U-shaped pipe 11; open the first shut-off valve 411 and the first branch pipe 41 continuously replenishes water at a small flow rate, so that the U-shaped water seal device returns to the air-ventilated state.

[0066] like Figure 1 As shown, optionally, the U-shaped water seal device also includes a normal drain pipe 53 and a water seal state regulating pipe 54. Both the normal drain pipe 53 and the water seal state regulating pipe 54 are connected to the low overflow port. The normal drain pipe 53 is equipped with a leak-proof drainer 531 and a normal pipe valve 532. Compared with the leak-proof drainer 531, the normal pipe valve 532 is far away from the drain end of the normal drain pipe 53. The water seal state regulating pipe 54 is equipped with a low-level shut-off valve 541, and the overflow pipe 5 is equipped with a high-level shut-off valve 51 that is higher than the low overflow port and lower than the high overflow port.

[0067] The normal drain pipe 53 is used for drainage in the ventilated state. The water seal state regulating pipe 54 is used to regulate the water seal state. Specifically, when the U-shaped water seal device switches from the water-flow state to the ventilated state, the water seal state regulating pipe 54 can be used to quickly drain water, reduce the liquid level in the overflow pipe 5, and quickly switch to the ventilated state. When the U-shaped water seal device breaks down, the water seal state regulating pipe 54 can be used to quickly overflow water into the overflow pipe 5 and quickly switch to the ventilated state.

[0068] In step S2, the high-position shut-off valve 51 remains open, and the low-position shut-off valve 541 remains open, draining the gas from the drain pipe 3, water tank 2, and overflow pipe 5 to prevent gas blockage and achieve rapid water replenishment to the water tank 2 and overflow pipe 5. In steps S3 and S4, the low-position shut-off valve 541 remains closed, the normal operating valve 532 remains open, and the high-position shut-off valve 51 remains closed, ensuring that water can only overflow from the leak-proof drain 531. The leak-proof drain 531 has the function of draining and blocking gas, preventing gas leakage and improving operational safety. In this embodiment, the leak-proof drain 531 is a float-type drain valve. The diameter of the normal operating drain pipe 53 is smaller than the diameter of the water seal regulating pipe 54. The low-position shut-off valve 541 is an industrial gate valve. When the U-shaped pipe 11 switches from the water-passing state to the air-passing state, the low-position shut-off valve 541 is also opened, and the water in the U-shaped pipe 11 is quickly discharged using the water seal state regulating pipe 54, thereby improving the switching efficiency of the U-shaped water seal device.

[0069] When the U-shaped water seal device is in the venting state, the water reservoir 2, drain pipe 3, and overflow pipe 5 form a water seal, and water overflows from the normal drain pipe 53, the normal pipe valve 532, and the leak-proof drain 531. When the U-shaped water seal device is in the water-flow state, that is, when the water seal is inside the U-shaped pipe 11, the low-level shut-off valve 541 is closed, the normal pipe valve 532 is closed, the high-level shut-off valve 51 is open, and water overflows from the high-level overflow port.

[0070] like Figure 1 As shown, the U-shaped water seal device further includes a high-level drainage pipe 52, which is connected to a high-level overflow port to guide the overflow water to the wastewater recycling tank. The normal drainage pipe 53 and the water seal state regulating pipe 54 also guide the water to the wastewater recycling tank.

[0071] like Figure 1 As shown, optionally, the water supply component 4 also includes a water supply pipe 43 and a water replenishment pipe 44. The first branch pipe 41 and the second branch pipe 42 are both connected to the water supply pipe 43, and the first branch pipe 41 and the second branch pipe 42 are both connected to the water replenishment pipe 44. The water supply pipe 43 is equipped with a water supply valve 431, and the water replenishment pipe 44 is equipped with a water replenishment valve 441. The diameter of the water supply pipe 43 is larger than the diameter of the water replenishment pipe 44. In step S2, the water supply valve 431 is opened to quickly replenish water in the water storage tank 2 and the overflow pipe 5, thereby improving the efficiency of emergency handling. In step S3, the water supply valve 431 is closed to replenish water in the water storage tank 2 after it is depleted. In step S4, the water replenishment valve 441 is opened to replenish water to the water storage tank 2 at a small flow rate to meet the overflow requirements under the ventilation state.

[0072] like Figure 1As shown, optionally, the U-shaped water seal device also includes a level gauge 6 installed on the overflow pipe 5 and a leak alarm 7 for detecting the gas concentration at the low-level overflow port and issuing an alarm. The level gauge 6 is not lower than the low-level overflow port. The U-shaped water seal device breakdown handling method further includes: when the leak alarm 7 issues an alarm and the level gauge 6 indicates that the liquid level is lower than the preset liquid level value, it indicates that the water tank 2 is severely short of water and the water seal of the water tank 2 has failed. Steps S1 and S2 are executed sequentially to replenish water to the water tank 2. When the gas concentration detected by the leak alarm 7 is lower than the preset concentration value, it indicates that the water seal effect of the water tank 2 has been restored. Steps S3 and S4 are executed sequentially to keep the U-shaped water seal device in a ventilated state. In this embodiment, the leak alarm 7 is a CO alarm and has explosion-proof function.

[0073] To achieve unattended, safe, and rapid operation, the U-shaped water seal device may optionally include a remote control station. The remote control station can receive information collected by the leak alarm 7 and the level gauge 6, and can remotely control the discharge valve 31, the inlet valve 32, the first shut-off valve 411, and the second shut-off valve 421.

[0074] Furthermore, the discharge valve 31, inlet valve 32, first shut-off valve 411, and second shut-off valve 421 are all electrically controlled explosion-proof valves. Using electrically controlled explosion-proof valves allows for remote control while preventing the generation of electrical sparks that could lead to an explosion in the event of a gas leak. In this embodiment, the high-level shut-off valve 51, low-level shut-off valve 541, water supply valve 431, and water replenishment valve 441 are also electrically controlled explosion-proof valves, facilitating remote operation and preventing explosions due to gas leaks. Examples of electrically controlled explosion-proof valves include explosion-proof electric ball valves or gate valves.

[0075] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A U-shaped water seal device, characterized in that, include: U-shaped tube with opening facing upwards (11); Water reservoir (2) below the U-shaped pipe (11); A drain pipe (3) is connected between the bottom of the U-shaped pipe (11) and the water reservoir (2). One end of the drain pipe (3) connected to the U-shaped pipe (11) is provided with a discharge valve (31), and the other end of the drain pipe (3) connected to the water reservoir (2) is provided with an inlet valve (32). The water supply assembly (4) includes a first branch pipe (41) and a second branch pipe (42). The first branch pipe (41) is connected to the side of the U-shaped pipe (11). A first shut-off valve (411) is provided on one end of the first branch pipe (41) connected to the U-shaped pipe (11). The second branch pipe (42) is connected to the drain pipe (3) between the discharge valve (31) and the inlet valve (32). A second shut-off valve (421) is provided on the second branch pipe (42). An overflow pipe (5) is connected to the water reservoir (2). The overflow pipe (5) extends upward from the water reservoir (2). The overflow pipe (5) is provided with a low overflow port and a high overflow port. The high overflow port is lower than the top of the U-shaped pipe (11) and higher than the bottom of the U-shaped pipe (11). The low overflow port is lower than the bottom of the U-shaped pipe (11) and higher than the water reservoir (2). A low-level shut-off valve (541) is provided at the low overflow port.

2. A method for operating a U-shaped water seal device, characterized in that, The implementation of the U-shaped water seal device according to claim 1 includes the following steps: The second shut-off valve (421) is closed, the first shut-off valve (411) is open, the discharge valve (31) and the inlet valve (32) are open, and the low-position shut-off valve (541) is closed, so that the U-tube (11) is in a water-passing state, the U-tube (11) is water-sealed, and the water storage device (2), the drain pipe (3) and the overflow pipe (5) form a water seal, and water overflows from the high-position overflow port.

3. The operating method of the U-shaped water seal device, characterized in that, The implementation of the U-shaped water seal device according to claim 1 includes the following steps: The second shut-off valve (421) is closed, the first shut-off valve (411) is open, the discharge valve (31) and the inlet valve (32) are open, and the low-position shut-off valve (541) is open, so that the U-tube (11) is in a venting state, and the water reservoir (2), the drain pipe (3) and the overflow pipe (5) form a water seal, and water overflows from the low-position overflow port.

4. A method for handling the breakdown of a U-shaped water seal device, characterized in that, Based on the implementation of the U-shaped water seal device according to claim 1, the U-shaped water seal device breaks down while in a ventilated state, including: Step S1: Close the discharge valve (31) and disconnect the connection between the U-shaped pipe (11) and the drain pipe (3); Step S2: Close the first shut-off valve (411) to stop water injection into the U-tube (11), open the second shut-off valve (421), and supply water to the water storage tank (2) through the second branch pipe (42) until water overflows from the low-level overflow port. Then, stop water injection through the second branch pipe (42). Step S3: Close the second shut-off valve (421) and open the discharge valve (31); Step S4: Open the first shut-off valve (411).

5. The method for handling the breakdown of the U-shaped water seal device according to claim 4, characterized in that, The U-shaped water seal device also includes a normal drain pipe (53) and a water seal state regulating pipe (54). Both the normal drain pipe (53) and the water seal state regulating pipe (54) are connected to the low-level overflow port. The normal drain pipe (53) is equipped with a leak-proof drain device (531) and a normal pipe valve (532). Compared to the leak-proof drain device (531), the normal pipe valve (532) is located away from the drain end of the normal drain pipe (53). The water seal state regulating pipe (54) The overflow pipe (5) is provided with a low-position shut-off valve (541) and a high-position shut-off valve (51) that is higher than the low-position overflow port and lower than the high-position overflow port. In step S2, the high-position shut-off valve (51) remains open and the low-position shut-off valve (541) remains open. In steps S3 and S4, the low-position shut-off valve (541) remains closed, the normal pipe valve (532) remains open, and the high-position shut-off valve (51) remains closed.

6. The method for handling the breakdown of the U-shaped water seal device according to claim 4, characterized in that, The water supply assembly (4) further includes a water supply pipe (43) and a water replenishment pipe (44). The first branch pipe (41) and the second branch pipe (42) are both connected to the water supply pipe (43) and the first branch pipe (41) and the second branch pipe (42) are both connected to the water replenishment pipe (44). The water supply pipe (43) is equipped with a water supply valve (431) and the water replenishment pipe (44) is equipped with a water replenishment valve (441). The diameter of the water supply pipe (43) is larger than the diameter of the water replenishment pipe (44). In step S2, the water supply valve (431) is opened. In step S3, the water supply valve (431) is closed. In step S4, the water replenishment valve (441) is opened.

7. The method for handling the breakdown of the U-shaped water seal device according to claim 4, characterized in that, The U-shaped water seal device further includes a level gauge (6) installed on the overflow pipe (5) and a leak alarm (7) for detecting the gas concentration at the low-level overflow port and issuing an alarm. The level gauge (6) is not lower than the low-level overflow port. The U-shaped water seal device breakdown handling method further includes: when the leak alarm (7) issues an alarm and the level gauge (6) indicates that the liquid level is lower than the preset liquid level value, steps S1 and S2 are executed in sequence; when the gas concentration detected by the leak alarm (7) is lower than the preset concentration value, steps S3 and S4 are executed in sequence.

8. The method for handling the breakdown of the U-shaped water seal device according to claim 7, characterized in that, The U-shaped water seal device also includes a remote work platform, which can receive the information collected by the leak alarm (7) and the level gauge (6). The remote work platform can remotely control the discharge valve (31), the inlet valve (32), the first shut-off valve (411), and the second shut-off valve (421).

9. The method for handling the breakdown of the U-shaped water seal device according to claim 8, characterized in that, The discharge valve (31), the inlet valve (32), the first shut-off valve (411), and the second shut-off valve (421) are all electrically controlled explosion-proof valves.

10. The method for handling the breakdown of the U-shaped water seal device according to claim 7, characterized in that, The leakage alarm (7) is a CO alarm.

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