Device and system for judging state of drainer through pressure difference value and change trend

Abstract

The invention relates to the technical field of gas pipe network safety, in particular to a device and system for judging the state of a drainer through a pressure difference value and a change trend. According to the device, the pressure and liquid level conditions of the drainer are monitored through the gas pipeline pressure gauge, the high-pressure chamber pressure gauge, the high-pressure chamber liquid level meter, the low-pressure chamber pressure gauge and the low-pressure chamber liquid level meter, and collected data are transmitted to the control box to be processed. According to the system provided by the invention, the collected data is uploaded to the gas safety bus platform, so that whether the drainer breaks down or not is judged in time, an alarm work order is pushed, the labor cost of maintenance work is greatly reduced, and the personal safety of maintenance personnel is protected.

Description

Technical Field

[0001] This invention relates to the field of gas pipeline safety technology, and more specifically, to a device and system for judging the status of a drainer by pressure difference and its changing trend. Background Technology

[0002] When gas is transported in pipelines, some saturated gas and mechanical water will separate out, adversely affecting gas delivery, pipeline facilities, and user experience. Therefore, it is essential to drain the condensate from the pipelines promptly. Current technology uses gas drainers to address this issue.

[0003] Currently, the vertical multi-stage water-sealed gas drainers widely used in domestic steel plants are purely mechanical structures and generally have the following problems: 1. Unclear internal conditions: The gas drainer mainly relies on the water seal height to seal the gas. Due to gas pressure fluctuations and water shortages, the internal water seal height may be insufficient, easily leading to water seal rupture and gas leakage accidents. Pressure fluctuations and water shortages cannot be observed from the outside of the drainer. 2. The gas contains impurities such as dust and tar. During long-term operation, these impurities accumulate with the gas condensate in the drainer's drain pipe and various compartments, causing blockages. The large accumulation of condensate in the pipes prevents the drainer from draining properly, resulting in gas pipeline pressure fluctuations, affecting normal gas use and pipeline safety.

[0004] Second, untimely handling of accidents: When a gas drainer leaks, it can only be discovered by inspection personnel, and then emergency repair personnel are dispatched to the scene. By this time, a long time has passed since the leak occurred, and it is very likely that nearby people have been poisoned by gas or an explosion has occurred.

[0005] 3. Heavy maintenance workload: To ensure the normal operation of the drainers, an inspection is usually arranged every 8 hours, and paper records need to be made manually; at the same time, some drainers are often short of water due to the pressure fluctuation of the gas pipeline, and maintenance personnel need to be frequently arranged to go to the site to replenish water. The workers are often exposed to the gas environment, which can easily lead to safety accidents due to human negligence. Summary of the Invention

[0006] The purpose of this invention is to address the problems existing in the prior art by providing a device and system for judging the status of a drainer through pressure difference and its changing trend. It monitors the pressure and liquid level of the drainer through a gas pipeline pressure gauge, a high-pressure chamber pressure gauge, a high-pressure chamber level gauge, a low-pressure chamber pressure gauge, and a low-pressure chamber level gauge, and transmits the collected data to a control box for processing, thereby enabling timely fault detection, reducing maintenance work, and ensuring personnel safety.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A device for determining the status of a drainer by pressure difference and its changing trend includes a gas pipeline, a drainer, and a water supply device. A gas pipeline pressure gauge is installed on the gas pipeline to monitor pressure. The gas pipeline is connected to the drainer via a drain pipe, on which two water collection valves are installed sequentially from top to bottom. The drainer includes a high-pressure chamber, a medium-high-pressure chamber, a medium-low-pressure chamber, and a low-pressure chamber, connected sequentially by a downpipe. A high-pressure chamber pressure gauge and a high-pressure chamber level gauge are installed on the high-pressure chamber to monitor pressure and level. A low-pressure chamber pressure gauge and a low-pressure chamber level gauge are installed on the low-pressure chamber. The system monitors pressure and liquid level. A control box is installed on the gas pipeline, and a data acquisition gateway device is installed inside the control box. The data acquisition gateway device collects, processes, and outputs the monitored pressure and liquid level. A drain outlet is installed on the low-pressure chamber, and the drain outlet is connected to a drain pipe. A water inlet is installed on the side wall of the high-pressure chamber. The water supply device includes a water supply pipe fixedly connected to the water inlet and a pressure water supply structure. The end of the water supply pipe away from the water inlet is fixedly connected to the pressure water supply structure, and the pressure water supply structure extends into the high-pressure chamber to inject water.

[0009] Furthermore, the low-pressure chamber is equipped with an exhaust valve for emergency pressure relief, the low-pressure chamber is connected to an anti-leakage device, a CO alarm is installed on the outside of the anti-leakage device, and the drain pipe is connected to the gas pipeline through a flared opening.

[0010] Furthermore, the maximum outer diameter of the pressure water supply structure is smaller than the inner diameter of the water inlet. The pressure water supply structure includes a retractable tubular elastic sensitive element bellows. The pressure water supply structure is fixedly connected to the water supply pipe through the bellows. An outer pipe is fixedly connected to the end of the bellows away from the water supply pipe. A retractable tubular elastic sensitive element expansion joint is fixedly connected to the inner wall of the outer pipe. The expansion joint communicates with the bellows. A movable component is fixedly connected to the end of the expansion joint away from the bellows. The outer wall of the movable component slides against the inner wall of the fixed component. A guide cylinder is fixedly installed inside the outer tube. The movable component slides against the inner wall of the guide cylinder to allow the movable component to move along the axis. The movable component has a movable water outlet on the side near the expansion joint, and the fixed component has a fixed water outlet on the side near the guide cylinder. The relative displacement of the movable water outlet and the fixed water outlet forms an overlapping area. The displacement of the movable component along the axis is positively correlated with the area of ​​the overlapping area. An outer tube water outlet is opened on the side wall of the outer tube, and the position of the outer tube water outlet matches the position of the fixed water outlet.

[0011] Furthermore, one end of the outer tube is a closed end fixed to the corrugated pipe, and the other end is an open end. Inside the outer tube, limiting ring one, limiting ring two, and limiting ring three are fixedly installed in sequence, thereby dividing the internal space of the tube into inner cavity one, inner cavity two, inner cavity three, and inner cavity four in sequence. The expansion joint is located in inner cavity one, and the inner wall of limiting ring one slides against the outer wall of the expansion joint and the movable part. The fixing part is fixedly installed in inner cavity two and inner cavity three by fixing limiting ring one, limiting ring two, and limiting ring three in sequence.

[0012] Furthermore, the guide cylinder is fixedly installed in the inner cavity four by fixing the limiting ring three; the movable part is fixedly installed with a base on the side near the guide cylinder, the base slides against the inner wall of the guide cylinder, the base is fixedly connected to a spring and a guide rod passing through the central axis of the spring; the other end of the spring is fixed to the inner wall of the guide cylinder, the guide rod passes through the guide cylinder and is fixedly connected to a sleeve, and the inner wall of the sleeve slides against the outer wall of the outer tube.

[0013] Furthermore, the fixed water outlet is located in the inner cavity three; the axial length of the sleeve covers the water outlet of the outer pipe, and the outer diameter of the sleeve is smaller than the inner diameter of the water inlet.

[0014] A system for determining the condition of a drainer based on pressure difference and its changing trend includes the following steps:

[0015] S1. Sensors collect data in real time and transmit the collected data: The gas pipeline pressure gauge, high-pressure chamber pressure gauge, high-pressure chamber level gauge, low-pressure chamber pressure gauge and low-pressure chamber level gauge transmit the monitoring data to the data acquisition gateway device in real time.

[0016] S2. Data Acquisition and Transmission by Control Box Acquisition Gateway: The control box acquisition gateway packages the data, adds a timestamp, and uploads it to the gas safety bus platform;

[0017] S3. Platform data preprocessing: After receiving the data, the platform removes outlier values ​​and uses an averaging algorithm to eliminate transient interference.

[0018] S4. Calculate and compare the data with the set values: Calculate the pressure difference between the gas pipeline and the high-pressure chamber, and compare the gas pipeline pressure, high-pressure chamber pressure, low-pressure chamber pressure, high-pressure chamber liquid level, low-pressure chamber liquid level, and pressure difference between the gas pipeline and the high-pressure chamber with the preset safety thresholds.

[0019] S5. Determine whether the gas pipeline system is faulty based on the comparison results; if the calculation results are within the safety threshold, continue to monitor subsequent data; if the comparison and calculation results exceed the safety threshold, push alarm work orders according to the fault situation.

[0020] Furthermore, in S4, the pressure difference between the gas pipeline and the high-pressure chamber = gas pipeline pressure - high-pressure chamber pressure.

[0021] Furthermore, in S5, the fault determination logic for determining whether the gas pipeline system is faulty based on the comparison results is as follows:

[0022] To determine if the drain pipe, bell mouth, water collection valve one, and water collection valve two are abnormal: when the change rate of the liquid level in the high-pressure chamber is <1%, and the absolute value of the pressure difference between the gas pipeline and the high-pressure chamber is >10% of the pipeline operating pressure, it is determined that the drain pipe, bell mouth, water collection valve one, and water collection valve two are blocked.

[0023] Judgment of high-pressure chamber abnormality: When the pressure in the high-pressure chamber is higher than the pressure in the gas pipeline and the liquid level in the high-pressure chamber continues to drop: when the liquid level in the high-pressure chamber is less than 10% of the normal water level in the high-pressure chamber and the water seal pressure corresponding to the water level in the high-pressure chamber is less than 1.5 times the operating pressure of the gas pipeline, a gas breakdown warning is issued for the high-pressure chamber; when there is no water overflow from the anti-leakage device connected to the low-pressure chamber, the water level in the low-pressure chamber continues to drop and the pressure in the low-pressure chamber is ≤0Pa, the high-pressure chamber is determined to be blocked;

[0024] Judgment of low-pressure chamber abnormalities: When the pressure in the low-pressure chamber is greater than or equal to the pressure in the high-pressure chamber and the liquid level in the low-pressure chamber continues to drop, the liquid level in the low-pressure chamber is less than 10% of the normal water level in the low-pressure chamber, and the water seal pressure corresponding to the water level in the low-pressure chamber is less than 1.5 times the operating pressure of the gas pipeline, a gas breakdown warning is issued for the low-pressure chamber; when the 30-day height change rate of the water level in the low-pressure chamber is less than 1% and there is no water overflow from the anti-leakage device connected to the low-pressure chamber, it is determined that the low-pressure chamber is blocked.

[0025] Judgment of abnormality of the leak prevention device: When the pressure value of the low pressure chamber is equal to the pressure corresponding to the water level height of the low pressure chamber at this time, and the pressure of the low pressure chamber and the water level height of the low pressure chamber remain unchanged, it is determined that the gas has broken through the high and low pressure chambers of the drainer, the leak prevention device is activated and a gas leakage warning is issued; if the CO alarm on the outside of the leak prevention device sounds briefly or continuously, it is determined that the leak prevention device has failed and a gas leakage accident has occurred.

[0026] Furthermore, it also includes the following steps: S6, Intelligent interlocking control system handles faults;

[0027] In S6, the execution logic for handling faults in the intelligent interlocking control system is as follows:

[0028] If the drain pipe, bell mouth, water collection valve one, and water collection valve two are determined to be abnormal, the gas pipeline is shut off. Nitrogen is used to purge and replace the gas pipeline and the inside of the drainer to reduce the CO content and clear the blockage area. Water is then added to the high-pressure chamber and low-pressure chamber of the drainer in sequence until overflow. When adding water to the high-pressure chamber, it is confirmed that the low-pressure chamber exhaust valve is open. The low-pressure chamber exhaust valve is then closed. After the gas pipeline and drainer are purged and replaced with nitrogen and pass the test, the gas is introduced.

[0029] When the high-pressure chamber is determined to be abnormal, close water collection valve one and water collection valve two, and plug the blind plate on the lower side of water collection valve two; purge and replace the drainer and drain pipe with nitrogen to reduce the CO content and clear the blockage area; replenish water to the high-pressure chamber and low-pressure chamber of the drainer in sequence until water continuously overflows from the outlet of the anti-leakage device connected to the low-pressure chamber. When replenishing water to the high-pressure chamber, confirm that the low-pressure chamber exhaust valve is in the open position, close the low-pressure chamber exhaust valve, and after the drainer, drain pipe and drainer are qualified by nitrogen purging and replacement, remove the blind plate on the lower side of water collection valve two and perform the coal gas introduction operation;

[0030] When the leak prevention device is determined to be abnormal or malfunctioning, close water collection valve one and water collection valve two, and plug the blind plate under water collection valve two; purge and replace the drainer and drain pipe with nitrogen to reduce CO content; replenish water to the high-pressure chamber and low-pressure chamber of the drainer in sequence until water continuously overflows from the outlet of the leak prevention device connected to the low-pressure chamber. When replenishing water to the high-pressure chamber, confirm that the low-pressure chamber exhaust valve is open and close the low-pressure chamber exhaust valve; check the internal components of the leak prevention device for damage and repair or replace them; when the leak prevention device's leak prevention sealing mechanism is activated due to gas overpressure fluctuations and insufficient water levels in the high-pressure and low-pressure chambers, replenish water to the high-pressure and low-pressure chambers to restore their water levels to normal before putting the leak prevention device into operation; when the leak prevention device's leak prevention sealing mechanism is activated due to excessive instantaneous discharge of condensate from the gas pipeline, depressurize the low-pressure chamber, and close the low-pressure chamber exhaust valve after the leak prevention device returns to normal operation, then put the drainer into normal use.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] (1) The device provided by the present invention monitors the pressure and liquid level of the drainer by a gas pipeline pressure gauge, a high-pressure chamber pressure gauge, a high-pressure chamber level gauge, a low-pressure chamber pressure gauge and a low-pressure chamber level gauge, and transmits the collected data to the control box for processing, so as to realize timely detection of faults, reduce maintenance work and ensure personnel safety.

[0033] (2) The device provided by the present invention optimizes the anti-clogging design by extending the water replenishment device into the high-pressure chamber, thereby avoiding the backflow of sediment from the bottom of the high-pressure chamber into the water replenishment port.

[0034] (3) The system provided by the present invention transmits the data collected by the sensor to the data acquisition gateway device and uploads it to the gas safety bus platform, thereby determining whether the drainer is faulty and pushing alarm work orders, which greatly reduces labor costs and protects the personal safety of maintenance personnel. Attached Figure Description

[0035] Figure 1 This is a structural diagram of the device of the present invention;

[0036] Figure 2This is a schematic diagram of the device of the present invention operating under normal pressure conditions;

[0037] Figure 3 This is a schematic diagram of the water replenishment device of the present invention;

[0038] Figure 4 This is a cross-sectional view of the water replenishment device of the present invention;

[0039] Figure 5 This is a three-dimensional structural view of the water supply pipe and corrugated pipe of the present invention;

[0040] Figure 6 This is a three-dimensional structural view of the telescopic joint and movable component of the present invention;

[0041] Figure 7 This is a schematic diagram showing the disassembled moving parts and fixing parts of the present invention;

[0042] Figure 8 This is a flowchart of the system of the present invention.

[0043] In the diagram: 1. Gas pipeline; 11. Gas pipeline pressure gauge; 2. Control box; 3. Drain pipe; 31. Water collection valve one; 32. Water collection valve two; 4. Drainer; 41. High-pressure chamber; 412. High-pressure chamber pressure gauge; 413. High-pressure chamber level gauge; 42. Medium-high pressure chamber; 43. Medium-low pressure chamber; 44. Low-pressure chamber; 441. Air vent valve; 442. Low-pressure chamber pressure gauge; 443. Low-pressure chamber level gauge; 45. Downpipe; 46. Drainer outlet; 5. Supplement 6. Water inlet; 61. Water supply device; 62. Water supply pipe; 63. Corrugated pipe; 64. Outer pipe; 65. Limiting ring one; 66. Limiting ring two; 67. Limiting ring three; 68. Outer pipe outlet; 69. Expansion joint; 60. Gasket; 61. Fixing component; 62. Fixed outlet; 63. Movable component; 64. Movable outlet; 65. Guide tube; 66. Spring; 67. Guide rod; 68. Connecting component; 68. Limiting ring four; 68. Sleeve. Detailed Implementation

[0044] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the invention.

[0045] In the description of this invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, 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 this invention.

[0046] Example 1:

[0047] Please see Figure 1-2 A device for determining the status of a drainer by pressure difference and its changing trend includes a gas pipeline 1, a control box 2, a drain pipe 3, and a drainer 4. The gas pipeline 1 is connected to the drainer 4 through the drain pipe 3 so that the condensate discharged from the gas pipeline 1 enters the drainer 4 through the drain pipe 3.

[0048] Gas pipeline 1 is installed above drainer 4. Control box 2 is installed on gas pipeline 1. Control box 2 contains a data acquisition gateway device. The data acquisition gateway device converts data from various parts of the gas pipeline system and uploads it to the gas safety bus platform through its built-in data acquisition gateway software module.

[0049] A gas pipeline pressure gauge 11 is installed on the gas pipeline 1. The gas pipeline pressure gauge 11 is used to monitor the pressure inside the gas pipeline 1 and transmit the collected data to the data acquisition gateway device.

[0050] The drain pipe 3 is installed with water collection valve 1 31 and water collection valve 2 32 from top to bottom. Water collection valve 1 31 and water collection valve 2 32 serve as intermediate interfaces to guide condensate to the inlet of the drainer 4. The drain pipe 3 is connected to the gas pipe 1 through a bell mouth.

[0051] The middle section of the drain pipe 3 is connected to the first water collection valve 31 and the second water collection valve 32 through two bends, and the minimum bend angle in the middle section of the drain pipe 3 is greater than 30°.

[0052] The drainer 4 includes a high-pressure chamber 41, a medium-high-pressure chamber 42, a medium-low-pressure chamber 43, a low-pressure chamber 44, and a drain outlet 46. The pressure inside the high-pressure chamber 41, the medium-high-pressure chamber 42, the medium-low-pressure chamber 43, and the low-pressure chamber 44 decreases sequentially. Each pair of high-pressure chamber 41, the medium-high-pressure chamber 42, the medium-low-pressure chamber 43, and the low-pressure chamber 44 is connected by a downpipe 45.

[0053] A pressure gauge 412 and a level gauge 413 are installed on the top of the high-pressure chamber 41 to monitor the pressure and level inside the high-pressure chamber 41, respectively.

[0054] The low-pressure chamber 44 is equipped with an exhaust valve 441, which is used to release pressure on the drain 4 in an emergency.

[0055] A pressure gauge 442 and a level gauge 443 are installed on the top of the low-pressure chamber 44 to monitor the pressure and level inside the low-pressure chamber 44, respectively.

[0056] The drain outlet 46 is installed on the low-pressure chamber 44 and is connected to the drain pipe.

[0057] like Figure 2 As shown (arrows indicate liquid flow direction), under normal working conditions of the gas pipeline network system, before gas is supplied to gas pipeline 1, water is injected into drainer 4 to ensure that the indoor pressure is normal and the water level is balanced; after gas is supplied, the condensate in gas pipeline 1 enters high-pressure chamber 41 through drain pipe 3, and the liquid levels in high-pressure chamber 41, medium-high pressure chamber 42, medium-low pressure chamber 43 and low-pressure chamber 44 remain stable.

[0058] Furthermore, the device provided by the present invention for judging the state of a drainer by pressure difference and change trend also includes a water inlet 5 and a water supply device 6. The water inlet 5 is installed at the bottom of the high-pressure chamber 41 near the ground, and the water inlet 5 is detachably connected to the water supply device 6. Since the gas contains impurities such as dust and tar, they enter the drainer 4 with the gas condensate during long-term operation and are deposited at the bottom of the high-pressure chamber 41. When the water supply device 6 is in the disassembled state, the inside of the drainer 4 can be cleaned through the water inlet 5.

[0059] The water replenishment device 6 includes a water replenishment pipe 61 and a pressure water replenishment structure. The water replenishment pipe 61 is equipped with a flange and is detachably connected to the water replenishment port 5 through the flange. The water replenishment pipe 61 is fixedly connected to the pressure water replenishment structure. When the water replenishment pipe 61 is connected to the water replenishment port 5, the pressure water replenishment structure extends into the high-pressure chamber 41.

[0060] During actual operation, the water inlet 5 is always lower than the normal water level in the high-pressure chamber 41, thus forming a liquid seal barrier to block the gas. Furthermore, because the pressure water supply structure extends into the interior of the high-pressure chamber 41, compared to the traditional sidewall water supply, it optimizes the anti-clogging design and avoids the situation where sediment at the bottom of the high-pressure chamber 41 flows back into the water inlet 5 under the sidewall water supply design. At the same time, the extended water supply achieves subsurface water supply in the pressure environment of the high-pressure chamber 41, avoiding water seal disturbance caused by pressure mismatch and water level oscillation caused by water flow impact under the traditional sidewall water supply.

[0061] The pressure water supply structure includes a bellows 62, an outer pipe 63, an expansion joint 64, a guide cylinder 68, and a sleeve 69. The bellows 62 is a retractable tubular elastic sensitive element, such as... Figure 5 As shown, one end of the corrugated pipe 62 is fixedly connected to the water supply pipe 61. The outer diameter of the corrugated pipe 62 is smaller than the outer diameter of the water supply pipe 61. By setting the corrugated pipe 62, the pressure water supply structure can move inside the high-pressure chamber 41, so as to prevent the bottom of the high-pressure chamber 41 from being submerged by silt formed by the accumulation of impurities such as dust and tar, which would lead to a reduction in water supply efficiency.

[0062] The end of the corrugated pipe 62 away from the water supply pipe 61 is fixedly connected to the outer pipe 63. The outer diameter of the outer pipe 63 is larger than that of the corrugated pipe 62, and the outer diameter of the outer pipe 63 is smaller than the inner diameter of the water supply port 5.

[0063] The outer tube 63 is hollow inside, with one end being a closed end fixed to the corrugated pipe 62 and the other end being an open end. Limiting ring 1 631, limiting ring 2 632 and limiting ring 3 633 are fixedly installed on the inner wall of the outer tube 63 in sequence. Limiting ring 1 631, limiting ring 2 632 and limiting ring 3 633 divide the interior of the outer tube 63 into inner cavity 1, inner cavity 2, inner cavity 3 and inner cavity 4 from left to right.

[0064] The expansion joint 64 is located in the inner cavity. One end of the expansion joint 64 is fixedly connected to the inner wall of the outer tube 63 near the bellows 62. The expansion joint 64 is a retractable tubular elastic sensitive element.

[0065] One end of the expansion joint 64 away from the bellows 62 is fixedly connected to the movable part 67. The limiting ring 631 is located at the connection between the expansion joint 64 and the movable part 67. The inner wall of the limiting ring 631 slides against the outer wall of the expansion joint 64 and the movable part 67. The outer wall of the gasket 65 is fixedly installed on the inner wall of the inner cavity. The limiting ring 631 is fixedly connected to one side of the gasket 65. The inner wall of the gasket 65 slides against the outer wall of the expansion joint 64.

[0066] The outer wall of the movable part 67 slides onto the inner wall of the fixed part 66. The fixed part 66 is fixedly installed in the inner cavity 2 and the inner cavity 3. One end of the fixed part 66 is fixedly connected to the limiting ring 1 631, the middle part is fixedly connected to the limiting ring 2 632, and the other end is fixedly connected to the limiting ring 3 633.

[0067] The guide tube 68 is fixedly installed in the inner cavity 4, with one end fixedly connected to the limiting ring 633, and the other end fixedly connected to the inner wall of the outer tube 63 through the connector 683. The guide tube has a hollow structure, and its hollow internal shape matches the moving part 67.

[0068] The guide tube 68 is closed at one end and open at the other. The open end of the guide tube 68 provides displacement space for the movable part 67. A base is fixedly installed on the movable part 67, and the base and the movable part 67 slide against the inner wall of the guide tube 68. The end of the base away from the movable part 67 is fixedly connected to a spring 681 and a guide rod 682 that passes through the central axis of the spring 681. The other end of the spring 681 is fixed to the inside of the closed end of the guide tube 68, and a limiting ring 684 is fixedly connected to the outside of the closed end of the guide tube 68. The other end of the guide rod 682 passes through the closed end of the guide tube 68 and is fixedly connected to a sleeve 69. The outer wall of the guide rod 682 slides against the inner wall of the limiting ring 684.

[0069] The axial displacement of the movable part 67 drives the base to compress and release the spring 681, thereby causing the guide rod 682 to push the sleeve 69 to perform synchronous telescopic movements.

[0070] Several movable water outlets 671 are opened on the side of the movable part 67 near the expansion joint 64, and several fixed water outlets 661 are opened on the side of the fixed part 66 near the guide tube 68. The fixed water outlets 661 are located in the cavity three.

[0071] When the movable part 67 is located within cavities two and three, the cylindrical wall of the movable part 67 and the cylindrical wall of the fixed part 66 together seal the movable outlet 671 and the fixed outlet 661. When the movable part 67 is axially displaced into the guide tube 68, the relative displacement of the movable outlet 671 and the fixed outlet 661 forms an overlapping area, which forms a water passage. The distance of displacement of the movable part 67 increases the overlapping area, thereby increasing the water passage cross-section and increasing the flow rate.

[0072] The inner wall of the sleeve 69 slides against the outer wall of the outer tube 63, and closes the open end of the outer tube 63. The outer tube 63 has an outer tube outlet 634 that connects to the cavity three on its side wall; the axial length of the sleeve 69 extends to cover the outer tube outlet 634.

[0073] The outer diameter of the sleeve 69 is smaller than the inner diameter of the water inlet 5, so that the pressure water supply structure can extend into the water inlet 5 and enter the high-pressure chamber 41.

[0074] When the movable part 67 is in the initial position, that is, when the movable part 67 is in the cavity two and the cavity three, the sleeve 69 completely seals the outer pipe outlet 634; when the guide rod 682 pushes the sleeve 69 to move axially, the sleeve 69 gradually moves away from the outer pipe outlet 634 so that the water passage is exposed and staged drainage is realized. At the same time, the displacement of the sleeve 69 is positively correlated with the water flow rate of the water passage.

[0075] When the water replenishment device 6 is installed at the water inlet 5, the pressure water replenishment structure extends into the bottom of the high pressure chamber 41. The bottom of the high pressure chamber 41 is deposited with silt formed by the accumulation of impurities such as dust and tar. Since the water replenishment device 6 is not replenishing water, the sleeve 69 completely covers the water outlet 634 of the outer pipe to prevent silt from entering the water replenishment device 6.

[0076] When water is replenished using the water replenishment device 6, the water flows sequentially through the water replenishment pipe 61, the corrugated pipe 62, and the expansion joint 64 into the movable part 67. Since the movable outlet 671 and the fixed outlet 661 are blocked at this time, the continuously injected water causes the water pressure to push the movable part 67 to move axially along the fixed part 66, the expansion joint 64 is stretched, and the relative displacement of the movable outlet 671 and the fixed outlet 661 forms an overlapping area. The water flows through the overlapping area formed by the movable outlet 671 and the fixed outlet 661.

[0077] Simultaneously, due to the axial displacement of the movable part 67 along the fixed part 66, the guide rod 682 pushes the sleeve 69 to move axially. The outer pipe outlet 634 gradually opens as the sleeve 69 moves, and water flows through the outer pipe outlet 634 into the high-pressure chamber 41, realizing the water replenishment operation. The greater the water flow at the water replenishment pipe 61, the greater the water pressure in the pressure water replenishment structure, the greater the axial displacement of the movable part 67, and the greater the compression displacement of the spring 681. When the spring 681 is compressed to the maximum working compression displacement, the axial displacement of the movable part 67 is the greatest, the movable outlet 671 and the fixed outlet 661 completely overlap, the outer pipe outlet 634 is fully open, and the water flow rate is the greatest at this time.

[0078] The device provided by this invention enables real-time monitoring of the gas pipeline 1 and the drainer 4 through the gas pipeline pressure gauge 11, the high-pressure chamber pressure gauge 412, the high-pressure chamber level gauge 413, the low-pressure chamber pressure gauge 442, and the low-pressure chamber level gauge 443. At the same time, the water replenishment device 6 avoids the problem of water shortage in the drainer due to gas pipeline pressure fluctuations, eliminating the need for frequent on-site water replenishment by maintenance personnel, thereby saving manpower and improving efficiency.

[0079] Example 2:

[0080] Please see Figure 1-8 A system for determining the status of a drainer based on pressure differential and its changing trend includes the following steps:

[0081] S1. Sensors collect data in real time and transmit the collected data: The gas pipeline pressure gauge, high-pressure chamber pressure gauge, high-pressure chamber level gauge, low-pressure chamber pressure gauge and low-pressure chamber level gauge transmit the monitoring data to the data acquisition gateway device in real time.

[0082] S2. Data Acquisition and Transmission by Control Box Acquisition Gateway: The control box acquisition gateway packages the data, adds a timestamp, and uploads it to the gas safety bus platform;

[0083] S3. Platform data preprocessing: After receiving the data, the platform removes outlier values ​​and uses an averaging algorithm to eliminate transient interference.

[0084] S4. Calculate data and compare with set values: Calculate the pressure difference between the gas pipeline and the high-pressure chamber, and compare the data and calculation results with the preset safety threshold.

[0085] S5. Determine whether the gas pipeline system is faulty based on the comparison results; if the calculation results are within the safety threshold, continue to monitor subsequent data; if the comparison and calculation results exceed the safety threshold, push alarm work orders according to the fault situation.

[0086] Furthermore, the fault diagnosis logic is determined as follows:

[0087] To determine if the drain pipe, bell mouth, water collection valve 1, and water collection valve 2 are abnormal: when the liquid level in the high-pressure chamber does not change (i.e., the height change rate is <1%), and the absolute value of the pressure difference between the gas pipeline and the high-pressure chamber is >10% of the pipeline operating pressure, it is determined that the drain pipe, bell mouth, water collection valve 1, and water collection valve 2 are blocked.

[0088] Determining High-Pressure Chamber Abnormalities: When the pressure in the high-pressure chamber is higher than the pressure in the gas pipeline and the liquid level in the high-pressure chamber continues to drop, either of the following two conditions must be met to determine that the high-pressure chamber is abnormal: the liquid level in the high-pressure chamber is less than 10% of the normal water level in the high-pressure chamber, and the water seal pressure corresponding to the water level in the high-pressure chamber is less than 1.5 times the operating pressure of the gas pipeline, a gas breakdown warning is issued for the high-pressure chamber; when there is no water overflow from the anti-leakage device connected to the low-pressure chamber, the water level in the low-pressure chamber continues to drop, and the pressure in the low-pressure chamber is ≤0Pa, the high-pressure chamber is determined to be blocked.

[0089] Determining Low-Pressure Chamber Anomalies: A low-pressure chamber is considered abnormal if the pressure in the low-pressure chamber is greater than or equal to the pressure in the high-pressure chamber and the liquid level in the low-pressure chamber continues to drop, meeting either of the following two conditions: Low-pressure chamber liquid level < 10% of the normal low-pressure chamber water level; or the water seal pressure corresponding to the low-pressure chamber water level < 1.5 times the operating pressure of the gas pipeline. Low-pressure chamber gas breakdown warning: If the 30-day height change rate of the low-pressure chamber water level is less than 1% and there is no water overflow from the leak-proof device connected to the low-pressure chamber, it is determined to be a low-pressure chamber blockage.

[0090] Judgment of abnormality of the leak prevention device: When the pressure value of the low pressure chamber is equal to the pressure corresponding to the water level height of the low pressure chamber, and the pressure and water level height of the low pressure chamber remain unchanged, it is determined that the gas has broken through the high and low pressure chambers of the drainer, the leak prevention device is activated and a gas leakage warning is issued; if the CO alarm fixed on the outside of the leak prevention device sounds briefly or continuously, it is determined that the leak prevention device has failed and a gas leakage accident has occurred.

[0091] This invention collects data in real time using sensors, determines faults based on the collected data, and then pushes alarm work orders according to the fault situation, thus avoiding casualties caused by untimely accident handling.

[0092] Example 3:

[0093] Please see Figure 1-8 Based on Embodiments 1 and 2, a system for determining the status of a drainer by pressure difference and its changing trend is provided. Unlike Embodiment 1, actuators are installed on the first water collection valve 31, the second water collection valve 32, the air vent valve 441, and the water inlet 5 to support the automatic start and stop of the control system.

[0094] According to embodiment 2, it also includes:

[0095] S6, Intelligent Interlocking Control System for troubleshooting.

[0096] If the drain pipe, bell mouth, water collection valve one, and water collection valve two are determined to be abnormal, the gas supply to the gas pipeline shall be stopped. The gas pipeline and the inside of the drainer shall be purged with nitrogen to reduce the CO content to below 24 ppm. Then, the blocked area shall be cleared. After clearing, the high and low pressure chambers of the drainer shall be replenished with water until they overflow (when replenishing the high pressure chamber, ensure that the low pressure chamber exhaust valve is open, and close the low pressure chamber exhaust valve after replenishing the water). After the gas pipeline and drainer are purged with nitrogen and the oxygen content is qualified (less than 1%), the gas supply shall be restored.

[0097] When an abnormality is detected in the high-pressure chamber, the operator, wearing a positive-pressure air respirator, closes water collection valves one and two, and plugs the blind flange on the lower side of water collection valve two. The drainer and drain pipe are purged with nitrogen until the CO content drops below 24 ppm. Then, the blocked area in the high-pressure chamber is cleared. After clearing, water is added to the high and low-pressure chambers of the drainer sequentially until water continuously overflows from the outlet of the leak prevention device connected to the low-pressure chamber (when adding water to the high-pressure chamber, ensure the low-pressure chamber exhaust valve is open; close the low-pressure chamber exhaust valve after adding water). After the drainer, drain pipe, and high and low-pressure chambers of the drainer are purged with nitrogen (oxygen content less than 1%), the blind flange on the lower side of water collection valve two is removed, and the coal gas ignition operation is performed.

[0098] When the leak prevention device is determined to be abnormal or malfunctioning, the operator, wearing a positive pressure air respirator, closes water collection valve one and water collection valve two, and plugs a blind flange on the lower side of water collection valve two. Purge and replace the drainer and drain pipe with nitrogen to reduce the CO content to below 24 ppm; sequentially replenish water to the high and low pressure chambers of the drainer until water continuously overflows from the outlet of the leak prevention device connected to the low pressure chamber (when replenishing water to the high pressure chamber, ensure the low pressure chamber exhaust valve is open, and close the low pressure chamber exhaust valve after replenishment). Inspect the internal components of the leak prevention device for damage and repair or replace them; if the leak prevention device's leak-proof sealing mechanism is activated due to gas overpressure fluctuations and insufficient water levels in the high and low pressure chambers, replenish water to both chambers to restore normal water levels before putting the leak prevention device into operation; if the leak prevention device's leak-proof sealing mechanism is activated due to excessive instantaneous discharge of condensate from the gas pipeline, depressurize the low pressure chamber, and close the low pressure chamber exhaust valve after the leak prevention device returns to normal operation, then the drainer can be put into normal use.

[0099] This invention determines the fault based on data collected by sensors, and then handles the fault through an intelligent interlocking control system with manual assistance, thereby achieving timely early warning and handling of accidents and ensuring personnel safety.

Claims

1. A device for determining the status of a drainer by measuring pressure difference and its changing trend, characterized in that: The system includes a gas pipeline, a drainer, and a water supply device. A gas pipeline pressure gauge is installed on the gas pipeline to monitor pressure. The gas pipeline is connected to the drainer via a drain pipe, which is sequentially equipped with a water collection valve (first and second) from top to bottom. The drainer comprises a high-pressure chamber, a medium-high-pressure chamber, a medium-low-pressure chamber, and a low-pressure chamber, sequentially connected by a downpipe. A high-pressure chamber pressure gauge and a high-pressure chamber level gauge are installed on the high-pressure chamber to monitor pressure and level. A low-pressure chamber pressure gauge and a low-pressure chamber level gauge are installed on the low-pressure chamber to monitor pressure and level. The gas... A control box is installed on the pipeline, and a data acquisition gateway device is installed inside the control box. The data acquisition gateway device collects, organizes, and outputs the monitored pressure and liquid level. A drain outlet is installed on the low-pressure chamber, and the drain outlet is connected to a drain pipe. A water inlet is installed on the side wall of the high-pressure chamber. The water supply device includes a water supply pipe fixedly connected to the water inlet and a pressure water supply structure. The end of the water supply pipe away from the water inlet is fixedly connected to the pressure water supply structure, and the pressure water supply structure extends into the high-pressure chamber to inject water.

2. The device for determining the state of a drainer by pressure difference and its changing trend according to claim 1, characterized in that: The low-pressure chamber is equipped with an exhaust valve for emergency pressure relief. The low-pressure chamber is connected to a leak prevention device, and a CO alarm is installed on the outside of the leak prevention device. The drain pipe is connected to the gas pipeline through a flared opening.

3. The device for determining the state of a drainer by pressure difference and its changing trend according to claim 1, characterized in that: The maximum outer diameter of the pressure water supply structure is smaller than the inner diameter of the water supply port. The pressure water supply structure includes a retractable tubular elastic sensitive element bellows. The pressure water supply structure is fixedly connected to the water supply pipe through the bellows. The end of the bellows away from the water supply pipe is fixedly connected to an outer pipe. The inner wall of the outer pipe is fixedly connected to a retractable tubular elastic sensitive element expansion joint. The expansion joint communicates with the bellows. The end of the expansion joint away from the bellows is fixedly connected to a movable component. The outer wall of the movable component slides against the inner wall of the fixed component. The fixed component is fixedly installed inside the outer pipe. A guide cylinder is fixedly installed inside the outer pipe. The movable component slides against the inner wall of the guide cylinder to allow the movable component to move along the axis. The movable component has a movable water outlet on the side near the telescopic joint, and the fixed component has a fixed water outlet on the side near the guide tube. The relative displacement of the movable water outlet and the fixed water outlet forms an overlapping area. The displacement of the movable component along the axis is positively correlated with the area of ​​the overlapping area. The outer pipe has an outer pipe water outlet on its side wall, and the position of the outer pipe water outlet matches the position of the fixed water outlet.

4. The device for determining the state of a drainer by pressure difference and its changing trend according to claim 3, characterized in that: One end of the outer tube is a closed end fixed to the corrugated pipe, and the other end is an open end. Inside the outer tube, limiting ring 1, limiting ring 2, and limiting ring 3 are fixedly installed in sequence, thereby dividing the internal space of the tube into inner cavity 1, inner cavity 2, inner cavity 3, and inner cavity 4 in sequence. The expansion joint is located in inner cavity 1, and the inner wall of limiting ring 1 slides against the outer wall of the expansion joint and the movable part. The fixing part is fixedly installed in inner cavity 2 and inner cavity 3 by fixing limiting ring 1, limiting ring 2, and limiting ring 3 in sequence.

5. The device for determining the state of a drainer by pressure difference and its changing trend according to claim 4, characterized in that: The guide cylinder is fixedly installed in the inner cavity four by the limiting ring three; the movable part is fixedly installed on the side near the guide cylinder, the base slides against the inner wall of the guide cylinder, the base is fixedly connected to a spring and a guide rod passing through the central axis of the spring; the other end of the spring is fixed to the inner wall of the guide cylinder, the guide rod passes through the guide cylinder and is fixedly connected to a sleeve, and the inner wall of the sleeve slides against the outer wall of the outer tube.

6. The device for determining the state of a drainer by pressure difference and its changing trend according to claim 5, characterized in that: The fixed water outlet is located in the inner cavity three; the axial length of the sleeve covers the water outlet of the outer pipe, and the outer diameter of the sleeve is smaller than the inner diameter of the water inlet.

7. A system for determining the status of a drainer based on pressure difference and its changing trend, as described in any one of claims 1-6, characterized in that: Includes the following steps: S1. Sensors collect data in real time and transmit the collected data: The gas pipeline pressure gauge, high-pressure chamber pressure gauge, high-pressure chamber level gauge, low-pressure chamber pressure gauge and low-pressure chamber level gauge transmit the monitoring data to the data acquisition gateway device in real time. S2. Data Acquisition and Transmission by Control Box Acquisition Gateway: The control box acquisition gateway packages the data, adds a timestamp, and uploads it to the gas safety bus platform; S3. Platform data preprocessing: After receiving the data, the platform removes outlier values ​​and uses an averaging algorithm to eliminate transient interference. S4. Calculate and compare the data with the set values: Calculate the pressure difference between the gas pipeline and the high-pressure chamber, and compare the gas pipeline pressure, high-pressure chamber pressure, low-pressure chamber pressure, high-pressure chamber liquid level, low-pressure chamber liquid level, and pressure difference between the gas pipeline and the high-pressure chamber with the preset safety thresholds. S5. Determine whether the gas pipeline system is faulty based on the comparison results; if the calculation results are within the safety threshold, continue to monitor subsequent data; if the comparison and calculation results exceed the safety threshold, push alarm work orders according to the fault situation.

8. A system for determining the status of a drainer based on pressure difference and its changing trend, as described in claim 7, characterized in that: In S4, the pressure difference between the gas pipeline and the high-pressure chamber = gas pipeline pressure - high-pressure chamber pressure.

9. A system for determining the status of a drainer based on pressure difference and its changing trend, as described in claim 7, characterized in that: In step S5, the fault determination logic for determining whether the gas pipeline system is faulty based on the comparison results is as follows: To determine if the drain pipe, bell mouth, water collection valve one, and water collection valve two are abnormal: when the change rate of the liquid level in the high-pressure chamber is <1%, and the absolute value of the pressure difference between the gas pipeline and the high-pressure chamber is >10% of the pipeline operating pressure, it is determined that the drain pipe, bell mouth, water collection valve one, and water collection valve two are blocked. Judgment of high-pressure chamber abnormality: When the pressure in the high-pressure chamber is higher than the pressure in the gas pipeline and the liquid level in the high-pressure chamber continues to drop: when the liquid level in the high-pressure chamber is less than 10% of the normal water level in the high-pressure chamber and the water seal pressure corresponding to the water level in the high-pressure chamber is less than 1.5 times the operating pressure of the gas pipeline, a gas breakdown warning is issued for the high-pressure chamber; when there is no water overflow from the anti-leakage device connected to the low-pressure chamber, the water level in the low-pressure chamber continues to drop and the pressure in the low-pressure chamber is ≤0Pa, the high-pressure chamber is determined to be blocked; Judgment of low-pressure chamber abnormalities: When the pressure in the low-pressure chamber is greater than or equal to the pressure in the high-pressure chamber and the liquid level in the low-pressure chamber continues to drop, the liquid level in the low-pressure chamber is less than 10% of the normal water level in the low-pressure chamber, and the water seal pressure corresponding to the water level in the low-pressure chamber is less than 1.5 times the operating pressure of the gas pipeline, a gas breakdown warning is issued for the low-pressure chamber; when the 30-day height change rate of the water level in the low-pressure chamber is less than 1% and there is no water overflow from the anti-leakage device connected to the low-pressure chamber, it is determined that the low-pressure chamber is blocked. Judgment of abnormality of the leak prevention device: When the pressure value of the low pressure chamber is equal to the pressure corresponding to the water level height of the low pressure chamber at this time, and the pressure and water level height of the low pressure chamber remain unchanged, it is determined that the gas has broken through the high and low pressure chambers of the drainer, the leak prevention device is activated and a gas leakage warning is issued; if the CO alarm on the outside of the leak prevention device sounds briefly or continuously, it is determined that the leak prevention device has failed and a gas leakage accident has occurred.

10. A system for determining the status of a drainer based on pressure difference and its changing trend, as described in claim 9, characterized in that: It also includes the following steps: S6, Intelligent Interlocking Control System for troubleshooting; In S6, the execution logic for handling faults in the intelligent interlocking control system is as follows: If the drain pipe, bell mouth, water collection valve one, and water collection valve two are determined to be abnormal, the gas pipeline is shut off. Nitrogen is used to purge and replace the gas pipeline and the inside of the drainer to reduce the CO content and clear the blockage area. Water is then added to the high-pressure chamber and low-pressure chamber of the drainer in sequence until overflow. When adding water to the high-pressure chamber, it is confirmed that the low-pressure chamber exhaust valve is open. The low-pressure chamber exhaust valve is then closed. After the gas pipeline and drainer are purged and replaced with nitrogen and pass the test, the gas is introduced. When the high-pressure chamber is determined to be abnormal, close water collection valve one and water collection valve two, and plug the blind plate on the lower side of water collection valve two; purge and replace the drainer and drain pipe with nitrogen to reduce the CO content and clear the blockage area; replenish water to the high-pressure chamber and low-pressure chamber of the drainer in sequence until water continuously overflows from the outlet of the anti-leakage device connected to the low-pressure chamber. When replenishing water to the high-pressure chamber, confirm that the low-pressure chamber exhaust valve is in the open position, close the low-pressure chamber exhaust valve, and after the drainer, drain pipe and drainer are qualified by nitrogen purging and replacement, remove the blind plate on the lower side of water collection valve two and perform the coal gas introduction operation; When the leak prevention device is determined to be abnormal or malfunctioning, close water collection valve one and water collection valve two, and plug the blind plate under water collection valve two; purge and replace the drainer and drain pipe with nitrogen to reduce CO content; replenish water to the high-pressure chamber and low-pressure chamber of the drainer in sequence until water continuously overflows from the outlet of the leak prevention device connected to the low-pressure chamber. When replenishing water to the high-pressure chamber, confirm that the low-pressure chamber exhaust valve is open and close the low-pressure chamber exhaust valve; check the internal components of the leak prevention device for damage and repair or replace them; when the leak prevention device's leak prevention sealing mechanism is activated due to gas overpressure fluctuations and insufficient water levels in the high-pressure and low-pressure chambers, replenish water to the high-pressure and low-pressure chambers to restore their water levels to normal before putting the leak prevention device into operation; when the leak prevention device's leak prevention sealing mechanism is activated due to excessive instantaneous discharge of condensate from the gas pipeline, depressurize the low-pressure chamber, and close the low-pressure chamber exhaust valve after the leak prevention device returns to normal operation, then put the drainer into normal use.

Images