A coal gas drainer monitoring device

Abstract

The utility model discloses a kind of coal gas drainer monitoring devices, including shell, the upper portion of the shell is provided with coal gas pipeline, water tank is installed on the inner wall of the shell, monitoring assembly is provided in the inside of the water tank, the monitoring assembly is used to monitor the state inside the water tank.The filter screen in fixed shell can efficiently intercept coal tar, rust particles and dust etc. in coal gas pipeline, the condensed water after filtration is impurity-free, can avoid the detection end of water level sensor and pressure sensor in monitoring assembly being contaminated, ensure that monitoring data is accurate and reliable, avoid misleading operation and maintenance decision, four water level sensors in the left and right sides of the inner wall of water tank respectively monitor high liquid level threshold and low liquid level threshold, when liquid level reaches high threshold, controller automatically opens the second electromagnetic valve drainage of water tank bottom drain pipe, avoid condensed water overflow and pour back coal gas pipeline, simultaneously through hydrostatic pressure of liquid column, resist the slight positive pressure in coal gas pipeline, prevent coal gas breakthrough and enter water tank.

Description

Technical Field

[0001] This utility model relates to the field of gas drainer monitoring technology, specifically a gas drainer monitoring device. Background Technology

[0002] Gas drainers are key equipment in gas transmission pipeline systems. They are mainly used to collect and drain condensate, water, and small amounts of impurities from gas pipelines to prevent water from clogging the pipelines and causing abnormal gas transmission pressure, or to prevent water from mixing with gas and causing safety hazards.

[0003] According to application number CN201720206297.6, a gas pipeline drainer capable of automatically monitoring and controlling its operating status is disclosed. The drainer comprises a drain pipe, a water storage tank, and a monitoring device. The lower end of the drain pipe is connected to the water storage tank, and the upper end is connected to the gas pipeline via a manual valve. The monitoring device includes a controller, a high-level sensor, a low-level sensor, a water supply solenoid valve, and a drain solenoid valve. The high-level and low-level sensors are mounted on the side wall of the water storage tank, and their output switching signals are connected to the controller. The control coils of the water supply solenoid valve and the drain solenoid valve are connected to the controller. The water storage tank is connected to a water source and the atmosphere via the water supply solenoid valve and the drain solenoid valve, respectively.

[0004] The above-mentioned cases do not have the effect of filtering condensate, which causes impurities such as coal tar, rust particles, and dust in the gas pipeline to directly enter the drainer with the condensate. In the short term, this will cause blockage of the drainer's pipes and valves. At the same time, the impurities will also cover the monitoring sensors, causing contamination of the sensor detection end, resulting in false alarms such as false liquid levels, which will mislead operation and maintenance decisions. To address this, we provide a gas drainer monitoring device. Utility Model Content

[0005] The purpose of this utility model is to provide a gas drainer monitoring device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a gas drainer monitoring device, comprising a housing, a gas pipeline disposed above the housing, a water tank installed on the inner wall of the housing, a monitoring component disposed inside the water tank for monitoring the state inside the water tank, a filter connection component disposed on the water tank for filtering impurities in the water, and a drive limiting component disposed on the housing for limiting and fixing the filter structure inside the filter connection component.

[0007] Optionally, the monitoring component includes a partition, a water level sensor, and a pressure sensor. The partition is installed on the inner wall of the water tank. There are four water level sensors, which are installed on the left and right sides of the inner wall of the water tank, respectively. There are two pressure sensors, which are installed on the top of the inner wall of the water tank, respectively.

[0008] Optionally, the filter connection assembly includes a fixed shell, and there are two fixed shells installed on the left and right sides of the top of the water tank respectively. The bottom of the fixed shell is connected to the water tank through a pipe, and the top of the fixed shell is equipped with a water inlet pipe that is connected to it. The top of the water inlet pipe passes through the shell and extends to the outside of it, and is connected to the gas pipeline through a flange.

[0009] Optionally, a filter screen is provided inside the fixed shell, and baffles are installed on the inner wall of the fixed shell at the top and bottom of the filter screen. A sealing plate is provided on the opposite side of the two fixed shells, and a slot is opened on the side of the sealing plate near the filter screen.

[0010] Optionally, the drive limiting assembly includes a servo motor and a mounting block. The servo motor is mounted on the top of the inner wall of the housing. There are two mounting blocks, each mounted on the top of the inner wall of the housing. A forward-rotating threaded rod is rotatably connected to the groove on the right side of the left mounting block via a bearing. A reverse-rotating threaded rod is rotatably connected to the groove on the left side of the right mounting block via a bearing. The forward-rotating threaded rod and the reverse-rotating threaded rod are fixedly connected by a fixed shaft.

[0011] Optionally, a drive gear is mounted on the surface of the servo motor output shaft, and a driven gear that meshes with the drive gear is mounted on the surface of the fixed shaft at a position corresponding to the drive gear.

[0012] Optionally, both the surface of the forward-rotating threaded rod and the surface of the reverse-rotating threaded rod are threadedly connected to limit plates. A fixing block is provided on the side of the limit plate away from the servo motor, and the two fixing blocks are fixedly connected by a guide rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The filter screen inside the fixed shell of this utility model can efficiently intercept coal tar, rust particles and dust in the gas pipeline. The filtered condensate is free of impurities, which can prevent the detection ends of the water level sensor and pressure sensor in the monitoring components from being contaminated, ensuring accurate and reliable monitoring data and avoiding misleading operation and maintenance decisions. The four water level sensors on the left and right sides of the inner wall of the water tank monitor the high liquid level threshold and the low liquid level threshold respectively. When the liquid level reaches the high threshold, the controller automatically opens the second solenoid valve of the drain pipe at the bottom of the water tank to drain the water, preventing the condensate from overflowing and backflowing into the gas pipeline. At the same time, the hydrostatic pressure of the liquid column counteracts the slight positive pressure in the gas pipeline, preventing the gas from breaking through and entering the water tank.

[0014] 2. The drive limiting component of this utility model achieves the effects of rapid limiting and convenient disassembly and assembly through automated design, which facilitates the disassembly and replacement of the filter screen inside the fixed shell. The limiting plate presses the sealing plate, which improves the sealing effect between the fixed shell and the filter screen. The pressing force can be precisely controlled by the speed of the servo motor, avoiding the problem of poor sealing or filter screen deformation caused by uneven manual fixing force. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a gas drainer monitoring device according to an embodiment of the present utility model; Figure 2 This is a three-dimensional structural cross-sectional view of a gas drainer monitoring device according to an embodiment of the present utility model; Figure 3 This is a three-dimensional structural cross-sectional view of the fixed shell and the drive limiting component according to the embodiment of this utility model; Figure 4 This is a three-dimensional structural cross-sectional view of the fixing shell and limiting plate according to the embodiments of this utility model; Figure 5 This is a three-dimensional structural diagram of the fixed shell and the drive limiting component according to an embodiment of the present utility model.

[0017] In the diagram: 1. Housing; 100. Gas pipe; 101. Water tank; 2. Monitoring component; 21. Partition; 22. Water level sensor; 23. Pressure sensor; 3. Filter connection component; 31. Fixed housing; 32. Water inlet pipe; 33. Filter screen; 34. Stop block; 35. Sealing plate; 36. Slot; 4. Drive limit component; 41. Servo motor; 42. Mounting block; 43. Forward threaded rod; 44. Reverse threaded rod; 45. Fixed shaft; 46. Drive gear; 47. Driven gear; 48. Limit plate; 49. Fixed block; 410. Guide rod; 5. Positioning block; 6. Positioning groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-5 A gas drainer monitoring device includes a housing 1. An audible and visual alarm is bolted to the right side of the housing 1 to emit an alarm sound. The housing 1 has a closed structure design to protect internal components from corrosion after a gas leak, extending the overall lifespan of the equipment. The housing 1 is made of 304 stainless steel. A water outlet pipe is installed at the bottom of the housing 1 and is connected to it. A fixed door is hinged to the front of the housing 1, and a controller is installed on the front of the fixed door. An audible and visual alarm, a water level sensor 22, a pressure sensor 23, a first solenoid valve, a second solenoid valve, and a servo motor 41 are electrically connected to the controller. A gas pipeline 100 is installed above the housing 1, through which gas is transmitted from left to right. The gas pipeline 100 is the main pipeline for transporting gas. Condensation is generated due to the temperature difference between the inside and outside of the pipeline, providing the drainer with condensate containing impurities. The pipeline slope design ensures that the condensate flows towards the inlet pipe 32 without water accumulation. A water tank 10 is installed on the inner wall of the housing 1. 1. Water tank 101 stores filtered condensate, providing monitoring space for monitoring component 2. It also blocks gas entry through a water seal and uses the hydrostatic pressure of the liquid column to counteract the slight positive pressure of the gas pipeline 100. Water tank 101 is internally divided into left and right chambers by a partition 21, which can respectively receive filtered condensate from the two fixed shells 31. Even if one side's filter is clogged, the other side can still drain normally, improving system redundancy. Water supply pipes connected to the top left and right sides of the front of water tank 101 are installed, each equipped with a valve. When the liquid level is too low, water can be manually added through the supply pipes to maintain the water seal height and prevent gas leakage. Drainage pipes connected to the bottom left and right sides of water tank 101 are installed, each equipped with a second solenoid valve. The drainage pipes can automatically drain water based on the signal from water level sensor 22 without manual operation. Water tank 101 is made of 304 stainless steel. The first and second solenoid valves can be linked with the controller and sensors for automatic control. For example, the second solenoid valve opens when the liquid level is high, and the first solenoid valve closes when the filter is clogged.

[0020] The water tank 101 is equipped with a monitoring component 2, which includes a partition 21, water level sensors 22, and pressure sensors 23. The partition 21 is installed vertically on the inner wall of the water tank 101, dividing the water tank 101 into two independent chambers. This ensures that a failure on one side does not affect the overall operation. The partition 21 is made of 304 stainless steel and is fixedly connected to the water tank 101 by welding. There are four water level sensors 22, which are installed on the left and right sides of the inner wall of the water tank 101, respectively. The two water level sensors 22 on the same side monitor the high liquid level threshold (80% of the water tank 101's volume) and the low liquid level threshold (20% of the water tank 101's volume), respectively. This provides signal basis for drainage and water replenishment, and can provide real-time feedback on liquid level changes. It is electrically connected to the controller. When the liquid level reaches a high threshold, the second solenoid valve is automatically opened to drain the water, and when it reaches a low threshold, a water replenishment reminder is triggered, realizing unattended operation. There are two pressure sensors 23, which are installed on the top of the inner wall of the water tank 101. The pressure sensors 23 monitor the pressure inside the water tank 101 in real time to determine whether there is gas seepage. The detection range is adapted to the 100 micro-positive pressure of the gas pipeline, from -10kPa to 10kPa. When the pressure is >500Pa, a gas seepage signal is detected, and an audible and visual alarm is immediately triggered. Working in conjunction with the water level sensor 22, it can determine whether the pressure abnormality is caused by excessive liquid level, avoiding false alarms.

[0021] A filter connection assembly 3 is provided on the water tank 101. The filter connection assembly 3 includes two fixed shells 31, which are respectively installed on the left and right sides of the top of the water tank 101. The fixed shells 31 serve as the mounting carriers for the filter screen 33, and connect the water inlet pipe 32 to the water tank 101, guiding the condensate to be filtered before entering the water tank 101. The fixed shells 31 are made of 304 stainless steel. The bottom of the fixed shells 31 is connected to the water tank 101 through a pipe, and the top of the fixed shells 31 is equipped with the water inlet pipe 32, which is connected to the fixed shells 31. The water inlet pipe 32 is equipped with a first solenoid valve and is connected to a gas pipe. The gas pipeline 100 and the fixed housing 31 supply condensate containing impurities. The flow of water is controlled by a first solenoid valve. The top of the inlet pipe 32 penetrates the housing 1 and extends to its exterior, connecting to the gas pipeline 100 via a flange. The inlet pipe 32 is made of 304 stainless steel with a polytetrafluoroethylene coating on the inner wall to prevent coal tar adhesion. A filter screen 33 is installed inside the fixed housing 31. The filter screen 33 intercepts impurities such as coal tar, rust particles, and dust in the condensate, preventing them from entering the water tank 101, clogging the pipes, and contaminating the sensor. The filter screen 33 is made of 120-150 mesh stainless steel woven mesh, ensuring a smooth flow. The filter screen 33 can be repeatedly cleaned and reused. The surface of the filter screen 33 is in contact with the inner wall of the fixed housing 31. A stop block 34 is installed on the inner wall of the fixed housing 31 at both the top and bottom of the filter screen 33. The side of the stop block 34 closest to the filter screen 33 is in contact with the filter screen 33. The stop block 34 supports the filter screen 33 from both top and bottom, limiting its vertical displacement. The stop block 34 is made of 304 stainless steel and is fixedly connected to the inner wall of the fixed housing 31 by welding. A sealing plate 35 is provided on each opposite side of the two fixed housings 31. The sealing plate 35 is made of 304 stainless steel and is located near the fixed housing. A fluorosilicone sealing gasket is attached to one side of the shell 31. A sealing plate 35 covers the opening side of the fixed shell 31, sealing the gap between the fixed shell 31 and the outside. At the same time, the horizontal position of the filter screen 33 is fixed by the slot 36. The side of the sealing plate 35 near the fixed shell 31 is in contact with the fixed shell 31. The side of the sealing plate 35 near the filter screen 33 has a slot 36. The side of the filter screen 33 near the slot 36 passes through the fixed shell 31 and the slot 36 and extends into the interior of the slot 36, contacting the inner wall of the slot 36. The slot 36 accommodates the edge of the filter screen 33, realizing the integrated fixation of the filter screen and the sealing plate 35. The groove width is precisely matched to the filter screen thickness, ensuring smooth filter screen insertion and achieving edge sealing of the filter screen through the clamping force of the sealing plate 35. Two positioning blocks 5 are installed on the side of the sealing plate 35 near the fixed shell 31. The fixed shell 31 has a positioning groove 6 on the side near the positioning blocks 5, corresponding to the position of the positioning blocks 5. The side of the positioning block 5 near the positioning groove 6 penetrates the positioning groove 6 and extends into it, contacting the inner wall of the positioning groove 6. The positioning block 5 is inserted into the positioning groove 6 of the fixed shell 31, achieving precise positioning of the sealing plate 35. The square structure design can limit the rotation and horizontal displacement of the sealing plate 35.Ensure that the sealing plate 35 is fully aligned with the opening of the fixed shell 31.

[0022] A drive limiting assembly 4 is provided on the housing 1. The drive limiting assembly 4 includes a servo motor 41 and mounting blocks 42. The servo motor 41 is installed on the top of the inner wall of the housing 1 and provides power to the drive limiting assembly 4. It drives the forward-rotating threaded rod 43 and the reverse-rotating threaded rod 44 to rotate through gear transmission. The speed can be precisely controlled from 0-1000 r / min. The clamping force is adjusted by the controller to avoid uneven manual operation that may cause poor sealing or filter deformation. It has built-in overload protection. When the limiting plate 48 presses against the sealing plate 35, the motor automatically stops to prevent damage to the components. There are two mounting blocks 42, which are installed on the top of the inner wall of the housing 1 respectively. The mounting blocks 42 support the forward-rotating threaded rod 43 and the reverse-rotating threaded rod through bearings. 44. To ensure stable rotation of the threaded rods, a forward-rotating threaded rod 43 is rotatably connected to the groove on the right side of the left mounting block 42 via a bearing, and a reverse-rotating threaded rod 44 is rotatably connected to the groove on the left side of the right mounting block 42 via a bearing. The forward-rotating threaded rod 43 and the reverse-rotating threaded rod 44 are fixedly connected by a fixed shaft 45. The threaded rod surface has a trapezoidal thread, which has high transmission efficiency and good self-locking performance. After rotation stops, the limiting plate 48 will not shift due to vibration. The forward and reverse thread design allows the limiting plates 48 on both sides to be pressed towards the middle or separated to both sides simultaneously, ensuring that the sealing plate 35 is subjected to uniform force. The fixed shaft 45 connects the forward-rotating threaded rod 43 and the reverse-rotating threaded rod 44, ensuring that they rotate on the same axis. The two ends of the fixed shaft 45 are welded. The servo motor 41 output shaft is fixedly connected to the forward-rotating threaded rod 43 and the reverse-rotating threaded rod 44 respectively. A drive gear 46 is mounted on the surface of the fixed shaft 45, and a driven gear 47 is mounted on the surface of the fixed shaft 45 at the position corresponding to the drive gear 46. The drive gear 46 and the driven gear 47 constitute a gear transmission mechanism, which transmits the power of the servo motor 41 to the fixed shaft 45, driving the threaded rod to rotate. The surfaces of the forward-rotating threaded rod 43 and the reverse-rotating threaded rod 44 are threadedly connected to limit plates 48. The limit plates 48 are threadedly connected to the threaded rods and move towards the sealing plate 35 under the guidance of the guide rod 410, pressing the sealing plate 35 to seal the fixed shell 31. The limit plates 48 are made of 304 stainless steel plate. The bottom of the limit plate 48 slides in contact with the top of the water tank 101, which serves as a guide for the limit plate 48, converting the force of the rotation of the threaded rod into a force that drives the limit plate 48 to move left and right. A fixing block 49 is provided on the side of the limit plate 48 away from the servo motor 41. The bottom of the fixing block 49 is fixedly connected to the top of the water tank 101. The two fixing blocks 49 are fixedly connected by a guide rod 410. One end of the guide rod 410 is fixedly connected to one side of the fixing block 49 by welding, and the other end needs to pass through the two limit plates 48 and be fixedly connected to another fixing block 49 by welding. The inner wall of the limit plate 48 slides in contact with the surface of the guide rod 410, providing guidance for the movement of the limit plate 48 and preventing the limit plate 48 from rotating or tilting.

[0023] When in use, the first solenoid valve of the water inlet pipe 32 is opened, and the condensate containing impurities in the gas pipeline 100 enters the water inlet pipe 32 through the flange and flows to the fixed shell 31. After the condensate enters the fixed shell 31, it is first filtered by the filter screen 33. Coal tar adheres to the surface of the filter screen, and rust particles and dust are intercepted. The filtered clean condensate flows into the water tank 101 through the bottom pipe of the fixed shell 31. When the condensate in a certain chamber of water tank 101 rises to the high liquid level threshold, which is 80% of the volume, the water level sensor 22 on that side sends a signal, and the controller automatically opens the second solenoid valve of the corresponding drain pipe. After draining to the low liquid level threshold of 20%, the valve is closed to prevent the water seal from failing. The pressure sensor 23 monitors the internal pressure of water tank 101 in real time and transmits the signal to the controller. When the filter screen 33 needs to be disassembled and replaced due to the adsorption of a large amount of impurities, the first solenoid valves of the two water inlet pipes 32 are closed by the controller, and the servo motor 41 is started on the controller. The servo motor 41 drives the double threaded rod to rotate through the drive gear 46 and the driven gear 47. The limiting plate 48 separates to both sides along the guide rod 410, releasing the clamping force on the sealing plate 35. The sealing plate 35 can be pulled manually, and it can be pulled out from one side of the fixed shell 31 with one hand, so that the slot 36 separates from the filter screen 33, exposing the filter screen 33. The filter screen 33 can then be pulled out from the fixed shell 31 and replaced with a new filter screen 33. Then, the sealing plate 35 and the slot 36 limit and seal the filter screen 33. The servo motor 41 is started again, so that the limiting plate 48 moves close to the sealing plate 35 and applies pressure to the sealing plate 35 to complete the installation.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas drain monitoring device, characterized in that: The device includes a housing (1), a gas pipe (100) is provided on the top of the housing (1), a water tank (101) is installed on the inner wall of the housing (1), a monitoring component (2) is provided inside the water tank (101) to monitor the state inside the water tank (101), a filter connection component (3) is provided on the water tank (101) to filter impurities in the water, and a drive limiting component (4) is provided on the housing (1) to limit and fix the filter structure inside the filter connection component (3).

2. The gas drain monitoring device according to claim 1, characterized in that: The monitoring component (2) includes a partition (21), a water level sensor (22), and a pressure sensor (23). The partition (21) is installed on the inner wall of the water tank (101). There are four water level sensors (22) installed on the left and right sides of the inner wall of the water tank (101), and there are two pressure sensors (23) installed on the top of the inner wall of the water tank (101).

3. The gas drain monitoring device according to claim 1, characterized in that: The filter connection assembly (3) includes a fixed shell (31), there are two fixed shells (31) and they are respectively installed on the left and right sides of the top of the water tank (101). The bottom of the fixed shell (31) is connected to the water tank (101) through a pipe. The top of the fixed shell (31) is equipped with an inlet pipe (32) that is connected to it. The top of the inlet pipe (32) passes through the shell (1) and extends to the outside of it and is connected to the gas pipe (100) through a flange.

4. The gas drain monitoring device according to claim 3, characterized in that: The interior of the fixed shell (31) is provided with a filter screen (33). A stop block (34) is installed on the inner wall of the fixed shell (31) at the top and bottom of the filter screen (33). A sealing plate (35) is provided on the opposite side of the two fixed shells (31). A slot (36) is provided on the side of the sealing plate (35) near the filter screen (33).

5. The gas drain monitoring device according to claim 1, characterized in that: The drive limiting assembly (4) includes a servo motor (41) and a mounting block (42). The servo motor (41) is mounted on the top of the inner wall of the housing (1). There are two mounting blocks (42), which are respectively mounted on the top of the inner wall of the housing (1). A forward threaded rod (43) is rotatably connected to the groove on the right side of the left mounting block (42) via a bearing. A reverse threaded rod (44) is rotatably connected to the groove on the left side of the right mounting block (42) via a bearing. The forward threaded rod (43) and the reverse threaded rod (44) are fixedly connected by a fixed shaft (45).

6. The gas drain monitoring device according to claim 5, characterized in that: A drive gear (46) is mounted on the surface of the output shaft of the servo motor (41), and a driven gear (47) that meshes with the drive gear (46) is mounted on the surface of the fixed shaft (45) at a position corresponding to the drive gear (46).

7. The gas drain monitoring device according to claim 5, characterized in that: The surfaces of the forward-rotating threaded rod (43) and the reverse-rotating threaded rod (44) are threadedly connected to a limiting plate (48). A fixing block (49) is provided on the side of the limiting plate (48) away from the servo motor (41). The two fixing blocks (49) are fixedly connected by a guide rod (410).

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