A borehole gas pressure monitoring device

Abstract

The utility model relates to pressure monitoring device field discloses a kind of borehole gas pressure monitoring devices, including monitoring device ontology, the outside fixed connection of monitoring device ontology has fixed structure, the inside fixed connection of fixed structure has separating device, collecting device and water release device, the fixed structure includes channel steel, the bottom of monitoring device ontology is located in channel steel, the top of channel steel is fixedly connected with multiple rectangular tubes, the top of rectangular tube is fixedly connected with square tube, the top of square tube is fixedly connected with support block, the inside of support block is fixedly connected with two reinforcing bars, the top of support block is fixedly connected with lifting ring. In the utility model, by setting fixed structure, the stereoscopic support frame of channel steel is matched with rectangular tube, square tube constructs, cooperate the reinforcing effect of reinforcing bar, can effectively resist underground vibration, impact and other external interference, avoid device displacement or damage, improve the stability of monitoring data.

Description

Technical Field

[0001] This utility model relates to the field of pressure monitoring devices, and in particular to a borehole gas pressure monitoring device. Background Technology

[0002] Borehole gas pressure monitoring devices are used in underground mining and geological exploration fields such as coal mines. By deploying relevant components in boreholes drilled into target rock formations such as coal seams, these devices enable real-time or periodic monitoring of gas pressure in the coal seam. They are key equipment for preventing disasters such as gas outbursts and ensuring safe production in mines. They also provide core data support for gas reserve assessment and extraction plan formulation.

[0003] Currently available borehole gas pressure monitoring devices encounter complex gas flow conditions around the borehole due to roadway fissures during pressure testing. This can lead to gas leakage or the mixing of other gases, making it impossible to accurately measure the true gas pressure of the coal seam. Furthermore, traditional borehole gas pressure monitoring devices also have shortcomings in gas-water separation. Many devices use a simple gravity settling gas-water separation method, relying on the gravity of water to achieve gas-water separation and allowing water to flow into the drain pipe. This can easily disturb the oil seal during settling, thus affecting the gas pressure distribution inside the coal seam and consequently the accuracy of the measurement data.

[0004] Therefore, those skilled in the art have provided a borehole gas pressure monitoring device to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies and provide a borehole gas pressure monitoring device. This device features a fixed structure that ensures stability in the complex and harsh environment of underground coal mines, preventing displacement or damage due to external factors and improving the stability of monitoring data. It also includes a separation device that utilizes the unique centrifugal separation and gravity settling effects of a gas-water separator to more accurately separate moisture and impurities from the gas, reducing interference from moisture in gas pressure measurement and improving accuracy. Furthermore, it incorporates a collection device using a novel gas collector and related intake regulating valves to enhance the stability of gas collection, reduce pressure fluctuations, and improve the accuracy of gas pressure measurement. Finally, it includes a water discharge device that utilizes buoyancy to automatically discharge accumulated water, improving the automation and efficiency of the monitoring device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A borehole gas pressure monitoring device includes a monitoring device body, a fixing structure fixedly connected to the outside of the monitoring device body, a push door fixedly connected to the front side of the fixing structure, and a separation device, a collection device and a water discharge device fixedly connected inside the fixing structure. The fixing structure includes a channel steel located at the bottom of the monitoring device body. Multiple rectangular tubes are fixedly connected to the top of the channel steel, square tubes are fixedly connected to the top of the rectangular tubes, a support block is fixedly connected to the top of the square tubes, two reinforcing ribs are fixedly connected to the inner side of the support block, and a lifting ring is fixedly connected to the top of the support block. Through the above technical solution, a fixed structure is set up, and the channel steel provides a stable support foundation for the entire monitoring device body. Multiple rectangular tubes and square tubes are set up to construct a three-dimensional support frame for the device, which enhances the overall strength and deformation resistance of the device.

[0007] Furthermore, the separation device includes a gas-water separator, the bottom of which is fixedly connected to a channel steel, a water vapor separation regulating valve is fixedly connected to the top of which, a first automatic air intake regulating valve is fixedly connected to one side of which, and a pneumatic butterfly valve and a handle-operated clamp butterfly valve are fixedly connected to the top of which. By employing the above technical solution, a separation device is set up. The gas-water separator utilizes a combination of centrifugal separation and gravity sedimentation to efficiently separate moisture and impurities mixed in the gas, thereby improving the gas-water separation effect and the accuracy of data measurement.

[0008] Furthermore, the collection device includes a gas collector, the bottom of which is fixedly connected to a channel steel, a second automatic air intake regulating valve is fixedly connected to one side of the gas collector, and a handle-operated clamp butterfly valve and two second flanges are fixedly connected to the bottom and top of the gas collector, respectively. By using the above technical solution and setting up a collection device, the gas collector can collect the separated gas in a concentrated manner, reduce gas leakage, and improve the airtightness of the device and the accuracy of data measurement.

[0009] Furthermore, the water discharge device includes a first water discharger and a second water discharger, which are connected through a pipeline. Two supports are fixedly connected to the bottom of the second water discharger, and the bottom of the supports is fixedly connected to a channel steel. A float base is fixedly connected inside the second water discharger, a float through rod is fixedly connected to the top of the float base, a float is fixedly connected to the outside of the float through rod, and a float sleeve is sleeved on the top of the float through rod. By using the above technical solution, a water discharge device is set up, and the first and second water dischargers form a double guarantee to ensure that the water generated after gas-water separation can be completely discharged, avoiding the accumulation of water inside the device that affects gas pressure measurement, improving the accuracy of measurement, and enhancing the automation level and working efficiency of the device.

[0010] Furthermore, the fixed structure is provided with multiple protective plates on its exterior, and the protective plates are fixed to the fixed structure by screws and threads. By using the above technical solutions and installing protective plates, the core components can be encased to prevent dust, gravel, water, and other debris in the coal mine from corroding and impacting the internal components, thereby improving the equipment's protective properties, extending its service life, and reducing the difficulty and time cost of maintenance operations.

[0011] Furthermore, the gas-water separator is externally fixedly connected to multiple pipes, the gas-water separator is connected to the gas collector through the pipes, the bottom of the gas-water separator is connected to a bend, the top of the gas-water separator is fixedly connected to a connecting pipe, the gas-water separator is connected to the first water drainer through the connecting pipe, and both ends of the pipes, bends and connecting pipes are fixedly connected to a second flange. By using the above technical solutions and installing pipelines, the gas separated by the gas-water separator can be transported to the gas collector, improving the smoothness of collection, reducing gas leakage and pressure loss during transportation, and reducing pollution. The installation of a second flange improves the sealing of the connection between the pipeline and the equipment, preventing gas leakage, while also facilitating the disassembly, replacement and maintenance of the pipeline, and improving the ease of maintenance of the device.

[0012] Furthermore, the gas collector is externally fixedly connected to multiple pipes, the bottom of the gas collector is connected to a bend pipe, the top of the gas collector is fixedly connected to a water vapor transparent separator, the top of the water vapor transparent separator is fixedly connected to a pressure gauge and a thin tube, the top of the thin tube is fixedly connected to a pressure sensor, the top of the gas collector is fixedly connected to two bellows, one end of the bellows is fixedly connected to a connecting pipe, and one end of the connecting pipe is connected to the first water discharge device. Through the above technical solution, the external pipes of the gas collector can be connected to other auxiliary equipment according to actual monitoring needs, expanding the function of the device. The bends can be installed to drain any residual water or impurities inside the gas collector, keeping the inside of the collector clean.

[0013] Furthermore, both ends of the first and second water drainers are fixedly connected to a first flange, the top of the first water drainer is fixedly connected to a plurality of handle-operated butterfly valves, and the top of the second water drainer is fixedly connected to a plurality of pneumatic butterfly valves. The above technical solution involves setting a first flange to improve the sealing and firmness of the connection between the first and second water drainers and other pipelines, preventing water leakage. A handle-operated wafer butterfly valve is installed to manually control the opening and closing of the water drainers when needed, improving the degree of automation. A pneumatic butterfly valve is used to control the start-up and operation of the second water drainer, which can be flexibly opened or closed according to the actual water accumulation situation. In conjunction with the automatic water draining mechanism, the flexibility and reliability of water draining control are improved.

[0014] Furthermore, the monitoring device body is internally fixedly connected to a DC power supply, a mine-use explosion-proof and intrinsically safe programmable controller, and an explosion-proof vacuum circuit breaker; Through the above technical solutions, a DC power supply is set up to provide a stable DC power supply, ensuring the continuity of monitoring. A mine-use explosion-proof and intrinsically safe programmable controller is set up to realize the intelligent operation of the device, receive data transmitted by detection components such as pressure sensors, perform data processing and storage, and provide a certain degree of safety by being explosion-proof. An explosion-proof vacuum circuit breaker is set up with good arc extinguishing performance and explosion-proof characteristics, which can quickly cut off the circuit, protect electrical components from damage, and improve the safety of the underground working environment of the device.

[0015] This utility model has the following beneficial effects: 1. The borehole gas pressure monitoring device proposed in this utility model, through the setting of a fixed structure, utilizes a three-dimensional support frame constructed with channel steel and rectangular and square tubes, and reinforced with reinforcing ribs, to effectively resist external interference such as vibration and impact in the mine, avoid device displacement or damage, improve the stability of monitoring data, reduce the difficulty of device handling and installation by using lifting rings, adapt to the needs of working in narrow underground spaces, and use protective plates to provide all-round protection for internal core components, extend the service life of the device, and improve the stability and applicability of the device in the complex environment of underground coal mines.

[0016] 2. The borehole gas pressure monitoring device proposed in this utility model, by setting up a separation device and a collection device, uses a gas-water separator combined with a water-vapor separation regulating valve and a first automatic air intake regulating valve to accurately separate moisture and impurities in the gas. By using a gas collector in conjunction with a second automatic air intake regulating valve, the processed gas can be collected stably, reducing pressure fluctuations and improving the accuracy, authenticity and reliability of gas pressure measurement.

[0017] 3. The borehole gas pressure monitoring device proposed in this utility model significantly improves the automation level and operational reliability of the device by setting up a water discharge device. The first and second water discharge devices form a double guarantee, ensuring that the water accumulated after gas-liquid separation can be completely discharged. The float ball inside the second water discharge device constructs an automatic water discharge structure, realizing automatic water discharge, improving the automation level and working efficiency of the device, reducing labor costs, and improving monitoring results.

[0018] 4. The borehole gas pressure monitoring device proposed in this utility model realizes intelligent operation and remote data transmission by setting up a mine-use explosion-proof and intrinsically safe programmable controller, which is compatible with the modern coal mine automated monitoring system and improves the automation level of the device operation. The explosion-proof vacuum circuit breaker can quickly cut off the power supply in the event of a circuit fault, prevent safety accidents and improve the safety of the device. The DC power supply ensures the continuous operation of the device in the event of an unstable power supply environment and improves the practicality of the device. Attached Figure Description

[0019] Figure 1 This is a perspective view of a borehole gas pressure monitoring device proposed in this utility model; Figure 2 This is a front view of the internal structure of a borehole gas pressure monitoring device proposed in this utility model; Figure 3 This is a rear view of the internal structure of a borehole gas pressure monitoring device proposed in this utility model; Figure 4 This is a schematic diagram of the internal structure of the second water discharge device of a borehole gas pressure monitoring device proposed in this utility model; Figure 5 This is a schematic diagram of the gas-water separator structure of a borehole gas pressure monitoring device proposed in this utility model; Figure 6 This is a schematic diagram of the gas collector structure of a borehole gas pressure monitoring device proposed in this utility model.

[0020] Explanation of reference numerals in the attached figures: 1. Monitoring device body; 2. Fixing structure; 201. Channel steel; 202. Rectangular tube; 203. Square tube; 204. Support block; 205. Reinforcing rib; 206. Lifting ring; 3. Push door; 4. Protective plate; 5. Separation device; 501. Gas-water separator; 502. Water-vapor separation regulating valve; 503. First automatic air intake regulating valve; 6. Collection device; 601. Gas collector; 602. Second automatic air intake regulating valve; 7. Screw; 8. Water discharge device; 801. First water discharger; 802. Second water discharger ; 803, float base; 804, float through rod; 805, float; 806, float sleeve; 9, pipe; 10, bend; 11, water vapor transparent separator; 12, pressure gauge; 13, thin tube; 14, pressure sensor; 15, connecting pipe; 16, bellows; 17, DC power supply; 18, mine explosion-proof and intrinsically safe programmable controller; 19, explosion-proof vacuum circuit breaker; 20, bracket; 21, pneumatic butterfly valve; 22, first flange; 23, handle-operated clamp butterfly valve; 24, connecting pipe; 25, second flange. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Reference Figure 1-6 This utility model provides a specific implementation method: A borehole gas pressure monitoring device includes a monitoring device body 1. A fixing structure 2 is fixedly connected to the outside of the monitoring device body 1. A push door 3 is fixedly connected to the front of the fixing structure 2. A separation device 5, a collection device 6, and a water discharge device 8 are fixedly connected inside the fixing structure 2. The fixing structure 2 includes a channel steel 201 located at the bottom of the monitoring device body 1. Multiple rectangular tubes 202 are fixedly connected to the top of the channel steel 201. Square tubes 203 are fixedly connected to the top of the rectangular tubes 202. A support block 204 is fixedly connected to the top of the square tubes 203. Two reinforcing ribs 205 are fixedly connected to the inner side of the support block 204. A lifting ring 206 is fixedly connected to the top of the support block 204. The fixing structure 2 and the channel steel 201 form the basis of the entire monitoring device. The main body 1 provides a stable supporting foundation. Multiple rectangular tubes 202 and square tubes 203 are used to construct a three-dimensional supporting frame for the device, enhancing its overall strength and resistance to deformation. The separation device 5 includes a gas-water separator 501. The bottom of the gas-water separator 501 is fixedly connected to the channel steel 201. A water-vapor separation regulating valve 502 is fixedly connected to the top of the gas-water separator 501. A first automatic air intake regulating valve 503 is fixedly connected to one side of the gas-water separator 501. A pneumatic butterfly valve 21 and a handle-operated clamp butterfly valve 23 are fixedly connected to the top of the gas-water separator 501. The gas-water separator 501 utilizes a combination of centrifugal separation and gravity sedimentation to efficiently separate moisture and impurities mixed in the gas, improving the gas-water separation effect and the accuracy of data measurement. The gas collection device 6 includes a gas collector 601, the bottom of which is fixedly connected to a channel steel 201. A second automatic air intake regulating valve 602 is fixedly connected to one side of the gas collector 601. A handle-operated clamp butterfly valve 23 and two second flanges 25 are fixedly connected to the bottom and top of the gas collector 601, respectively. By setting up the gas collection device 6, the gas collector 601 can collect the separated gas in a concentrated manner, reducing gas leakage and improving the airtightness of the device and the accuracy of data measurement. The water discharge device 8 includes a first water discharger 801 and a second water discharger 802, which are connected by a pipeline. Two supports 20 are fixedly connected to the bottom of the second water discharger 802. The bottom is fixedly connected to the channel steel 201. A float base 803 is fixedly connected inside the second water drainer 802. A float through-rod 804 is fixedly connected to the top of the float base 803. A float 805 is fixedly connected to the outside of the float through-rod 804. A float sleeve 806 is fitted onto the top of the float through-rod 804. A water draining device 8 is provided. The first water drainer 801 and the second water drainer 802 form a double protection system, ensuring that the water generated after gas-water separation can be completely drained, preventing water accumulation inside the device from affecting gas pressure measurement, improving measurement accuracy, and enhancing the automation and efficiency of the device. Multiple protective plates 4 are provided on the outside of the fixed structure 2. The protective plates 4 are threadedly fixed to the fixed structure 2 by screws 7.The gas-water separator 501 is designed to enclose core components, preventing corrosion and impact from dust, gravel, water, and other debris in the coal mine. This enhances the equipment's protection, extends its service life, and reduces maintenance difficulty and time costs. Multiple pipes 9 are fixedly connected to the exterior of the gas-water separator 501. The gas-water separator 501 is connected to the gas collector 601 via these pipes. A bend 10 is connected to the bottom of the gas-water separator 501, and a connecting pipe 15 is fixedly connected to the top. The gas-water separator 501 is connected to the first water drainer 801 via the connecting pipe 15. Second flanges 25 are fixedly connected to both ends of the pipes 9, bends 10, and connecting pipe 15. The pipes 9 are designed to separate the gas from the gas-water separator 501. The gas is conveyed to the gas collector 601 to improve the smoothness of collection, reduce gas leakage and pressure loss during the transportation process, and reduce pollution. A second flange 25 is installed to improve the sealing of the connection between the pipeline and the equipment, prevent gas leakage, and facilitate the disassembly, replacement and maintenance of the pipeline, thus improving the convenience of the device's maintenance. Multiple pipes 9 are fixedly connected to the outside of the gas collector 601. The bottom of the gas collector 601 is connected to a bend 10. A water vapor transparent separator 11 is fixedly connected to the top of the gas collector 601. A pressure gauge 12 and a thin tube 13 are fixedly connected to the top of the water vapor transparent separator 11. A pressure sensor 14 is fixedly connected to the top of the thin tube 13. Two bellows 16 are fixedly connected to the top of the gas collector 601. One end of pipe 16 is fixedly connected to a connecting pipe 24, and one end of the connecting pipe 24 is connected through to the first water drainer 801. The pipe 9 outside the gas collector 601 can be connected to other auxiliary equipment according to actual monitoring needs to expand the function of the device. A bend 10 is provided to drain any residual water or impurities that may remain inside the gas collector 601, keeping the inside of the collector clean. Both ends of the first water drainer 801 and the second water drainer 802 are fixedly connected to a first flange 22. Multiple handle-operated clamp butterfly valves 23 are fixedly connected to the top of the first water drainer 801, and multiple pneumatic butterfly valves 21 are fixedly connected to the top of the second water drainer 802. The first flange 22 is provided to improve the sealing and firmness of the connection between the first water drainer 801 and the second water drainer 802 and other pipelines. To prevent water leakage, a handle-operated clamp-on butterfly valve 23 is provided, allowing manual control of the water discharger's opening and closing when needed, improving automation. A pneumatic butterfly valve 21 controls the start-up and operation of the second water discharger 802, flexibly opening or closing according to actual water accumulation. Working in conjunction with the automatic water discharge mechanism, it enhances the flexibility and reliability of water discharge control. The monitoring device body 1 is internally connected to a DC power supply 17, a mine-use explosion-proof and intrinsically safe programmable controller 18, and an explosion-proof vacuum circuit breaker 19. The DC power supply 17 provides stable DC power to ensure continuous monitoring. The mine-use explosion-proof and intrinsically safe programmable controller 18 enables intelligent operation of the device and receives data from detection components such as the pressure sensor 14, performing data processing and storage.Furthermore, it provides explosion-proof protection and a certain level of safety. The explosion-proof vacuum circuit breaker 19 has excellent arc-extinguishing performance and explosion-proof characteristics, enabling it to quickly cut off the circuit, protect electrical components from damage, and improve the safety of the downhole working environment.

[0023] Working Principle: When the borehole gas pressure monitoring device is in operation, the DC power supply 17 inside the monitoring device body 1 is first turned on to supply power. The intrinsically safe and explosion-proof programmable controller 18 is activated for overall control, and the explosion-proof vacuum circuit breaker 19 is activated to ensure circuit safety. After the gas to be monitored is drawn into the gas-water separator 501, the intrinsically safe and explosion-proof programmable controller 18 controls the opening and closing of the first automatic air intake regulating valve 503 to automatically adjust the air intake flow rate, avoiding sudden changes in gas flow rate from affecting the separation effect. The gas-water separator 501 is activated, using the dual principles of centrifugal separation and gravity sedimentation to separate the water and impurities in the gas. The operator can adjust the valve to remove the gas. The water-vapor separation regulating valve 502 optimizes the separation parameters to ensure thorough separation under different operating conditions. During the separation process, the pneumatic butterfly valve 21 is activated to control the start and stop of the gas-water separator 501. The control handle clamp butterfly valve 23 can cut off the gas path in case of abnormality. Then, the dried gas after being processed by the gas-water separator 501 is transported to the gas collector 601 through pipeline 9. The mine explosion-proof and intrinsically safe programmable controller 18 controls the second automatic air intake regulating valve 602, which, together with the first automatic air intake regulating valve 503, stably controls the gas flow rate entering the gas collector 601, avoiding gas pressure fluctuations in the collector. At this time, the water vapor at the top of the gas collector 601 is controlled. The transparent separator 11 performs secondary dehydration on the gas, ensuring that the gas is dry. A portion of the gas enters the pressure gauge 12, providing workers with a visual pressure reading. The other portion enters the pressure sensor 14 through the thin tube 13. The pressure sensor 14 converts the pressure signal into an electrical signal and transmits it to the mine explosion-proof and intrinsically safe programmable controller 18, enabling real-time data acquisition and remote transmission. Finally, the water produced during gas-water separation flows partly into the first drainer 801 of the water discharge device 8 through the bend 10 at the bottom and the connecting pipe 15 at the top of the gas-water separator 501, and partly through the bend 10 at the bottom and the corrugated pipe 16 at the top of the gas collector 601. Connecting pipe 24 also flows into the first drainer 801. After the first drainer 801 initially collects the accumulated water, it is transported to the second drainer 802 through the pipeline. When the water in the second drainer 802 reaches the set water level, the float 805 rises along the float rod 804 under the action of buoyancy, triggering the draining mechanism to automatically open and drain water. After the water level drops, the float 805 falls back, and the draining mechanism closes, realizing unattended automatic water drainage. If the automatic draining mechanism fails, the drainage can be manually controlled by the handle on the top of the first drainer 801 to clamp the butterfly valve 23 and the pneumatic butterfly valve 21 on the top of the second drainer 802, forming a double guarantee to avoid water accumulation affecting monitoring.

[0024] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0025] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A borehole gas pressure monitoring device, comprising a monitoring device body (1), characterized in that: The monitoring device body (1) is externally fixedly connected to a fixed structure (2), and a push door (3) is fixedly connected to the front side of the fixed structure (2). The fixed structure (2) is internally fixedly connected to a separation device (5), a collection device (6), and a water discharge device (8). The fixed structure (2) includes a channel steel (201), which is located at the bottom of the monitoring device body (1). Multiple rectangular tubes (202) are fixedly connected to the top of the channel steel (201), and square tubes (203) are fixedly connected to the top of the rectangular tubes (202). A support block (204) is fixedly connected to the top of the square tubes (203). Two reinforcing ribs (205) are fixedly connected to the inner side of the support block (204), and a lifting ring (206) is fixedly connected to the top of the support block (204).

2. The borehole gas pressure monitoring device according to claim 1, characterized in that: The separation device (5) includes a gas-water separator (501), the bottom of which is fixedly connected to a channel steel (201), a water vapor separation regulating valve (502) is fixedly connected to the top of which, a first automatic air intake regulating valve (503) is fixedly connected to one side of which, and a pneumatic butterfly valve (21) and a handle clamp butterfly valve (23) are fixedly connected to the top of which.

3. The borehole gas pressure monitoring device according to claim 1, characterized in that: The collection device (6) includes a gas collector (601), the bottom of which is fixedly connected to a channel steel (201), a second automatic air intake regulating valve (602) is fixedly connected to one side of the gas collector (601), and a handle-operated clamp butterfly valve (23) and two second flanges (25) are fixedly connected to the bottom and top of the gas collector (601), respectively.

4. The borehole gas pressure monitoring device according to claim 1, characterized in that: The water discharge device (8) includes a first water discharger (801) and a second water discharger (802). The first water discharger (801) and the second water discharger (802) are connected through a pipeline. The bottom of the second water discharger (802) is fixedly connected to two supports (20). The bottom of the supports (20) is fixedly connected to a channel steel (201). The inside of the second water discharger (802) is fixedly connected to a float base (803). The top of the float base (803) is fixedly connected to a float through rod (804). The outside of the float through rod (804) is fixedly connected to a float (805). The top of the float through rod (804) is sleeved with a float sleeve (806).

5. The borehole gas pressure monitoring device according to claim 1, characterized in that: The fixed structure (2) is provided with multiple protective plates (4) on its exterior, and the protective plates (4) are threadedly fixed to the fixed structure (2) by screws (7).

6. The borehole gas pressure monitoring device according to claim 2, characterized in that: The gas-water separator (501) is externally fixedly connected to multiple pipes (9). The gas-water separator (501) is connected to the gas collector (601) through the pipes (9). The bottom of the gas-water separator (501) is connected to a bend (10). The top of the gas-water separator (501) is fixedly connected to a connecting pipe (15). The gas-water separator (501) is connected to the first water drainer (801) through the connecting pipe (15). The two ends of the pipes (9), bend (10) and connecting pipe (15) are all fixedly connected to a second flange (25).

7. The borehole gas pressure monitoring device according to claim 3, characterized in that: The gas collector (601) is externally fixedly connected to multiple pipes (9). The bottom of the gas collector (601) is connected to a bend (10). The top of the gas collector (601) is fixedly connected to a water vapor transparent separator (11). The top of the water vapor transparent separator (11) is fixedly connected to a pressure gauge (12) and a thin tube (13). The top of the thin tube (13) is fixedly connected to a pressure sensor (14). The top of the gas collector (601) is fixedly connected to two corrugated pipes (16). One end of the corrugated pipe (16) is fixedly connected to a connecting pipe (24). One end of the connecting pipe (24) is connected to the first water drainer (801).

8. A borehole gas pressure monitoring device according to claim 4, characterized in that: Both ends of the first drainer (801) and the second drainer (802) are fixedly connected to a first flange (22). The top of the first drainer (801) is fixedly connected to a plurality of handle-operated clamp butterfly valves (23), and the top of the second drainer (802) is fixedly connected to a plurality of pneumatic butterfly valves (21).

9. The borehole gas pressure monitoring device according to claim 1, characterized in that: The monitoring device body (1) is internally fixedly connected to a DC power supply (17), a mine explosion-proof and intrinsically safe programmable controller (18), and an explosion-proof vacuum circuit breaker (19).

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