Draining device for pneumatically controlling extraction pipeline on inner side of belt
By designing a pneumatically controlled water drain device on the inner side of the belt, the problems of gas leakage and poor sealing during drainage in existing devices have been solved, achieving stable operation and efficient drainage of the gas extraction system.
Patent Information
- Application Number
- CN202511749981.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-01-06
AI Technical Summary
Existing drainage devices cannot maintain a closed negative pressure environment in the gas extraction pipeline during drainage operations, leading to gas leakage, energy waste and air pollution, affecting extraction efficiency, and valves that are not tightly sealed, which can easily form continuous leakage points, resulting in long-term incomplete operation of the extraction system.
Design a pneumatically controlled water discharge device for a belt conveyor inside a pumping pipeline. Utilizing a filter container, an extended storage container, a cylinder, and a negative pressure self-priming valve, the device achieves air-water separation and automatic discharge of accumulated water through gravity settling and pneumatic control. It ensures that the valve is sealed during non-drainage periods and that the accumulated water is quickly discharged and the seal is rapidly reset during drainage by relying on gravity and pressure difference.
To minimize the gas leakage window, ensure the airtightness of the extraction system during non-drainage periods, improve extraction efficiency, prevent gas concentration dilution, avoid energy waste and air pollution, and achieve stable system operation.
Smart Images
Figure CN121273408A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of auxiliary equipment for gas extraction operations, and in particular to a pneumatically controlled water discharge device for a gas extraction pipeline on the inner side of a belt conveyor. Background Technology
[0002] Gas drainage is a core safety measure for coal mine production. However, water accumulation in drainage pipelines is a common technical problem in the industry. Water accumulation can clog pipelines, reduce drainage efficiency, and may also cause equipment corrosion and safety accidents. During the drilling and subsequent stages of the 42107 coal seam, a large amount of water gushed into the borehole gas collection pipe. The existing handling methods have significant drawbacks: manual water drainage requires crossing an operating conveyor belt, and the operation in the confined space poses an extremely high risk to personal safety; if the conveyor belt is pressed to stop the water drainage, the production process will be interrupted, resulting in production capacity loss.
[0003] Existing drainage devices cannot maintain the necessary closed negative pressure environment for gas extraction pipelines during drainage operations. At the moment of opening the drainage system, the pipeline system is directly or indirectly connected to the outside atmosphere, causing a large amount of gas to leak into the roadway air. This not only wastes energy and causes potential air pollution, but also directly disrupts the negative pressure stability of the extraction system, leading to a sharp drop in extraction efficiency. The extracted gas concentration is diluted by the air, affecting subsequent gas utilization. In addition, conventional valves are prone to not closing tightly or not sealing properly after drainage, creating a continuous leakage point after closure, causing the extraction system to operate in an incomplete state for a long time.
[0004] To address the aforementioned issues, this solution utilizes the negative pressure generated within the extraction pipeline and the valve core itself during the water collection and storage phase. The valve core remains firmly adhered to the valve seat, forming a self-sealing mechanism that ensures the airtightness of the extraction system during non-drainage periods. When drainage is required, the valve opens under pneumatic force, but the pressure inside the storage container remains balanced with the ambient pressure. Water is discharged primarily by gravity and instantaneous pressure differential, minimizing the window of gas leakage. After the drainage command is completed, the valve, in conjunction with the newly established negative pressure adsorption force of the pipeline, quickly closes, achieving a seal. Summary of the Invention
[0005] To overcome the limitations of existing drainage devices, which struggle to maintain the necessary closed negative pressure environment for gas extraction pipelines during drainage operations, the system is directly or indirectly connected to the external atmosphere at the moment drainage begins. This results in a large leakage of gas into the roadway air, causing not only energy waste and potential air pollution but also directly disrupting the negative pressure stability of the extraction system, leading to a sharp decline in extraction efficiency. The extracted gas concentration is diluted by the air, affecting subsequent gas utilization. Furthermore, conventional valves are prone to incomplete closure or leaks after drainage, creating a persistent leak point and causing the extraction system to operate under incomplete conditions for extended periods.
[0006] The technical solution of the present invention is as follows: a pneumatically controlled water discharge device for a conveyor belt inner side extraction pipeline, comprising a filter container, a water inlet, an extended storage container, a cylinder, and a negative pressure self-priming valve. The water inlet is provided above the filter container, the extended storage container is provided on one side of the filter container, the cylinder is provided inside the extended storage container, and the negative pressure self-priming valve is provided on one side of the extended storage container.
[0007] Preferably, the filter container is used as a primary treatment unit to separate gas and water using the principle of gravity sedimentation, while intercepting solid impurities. The water inlet is used to introduce the mixture of water and gas in the extraction pipeline. The extended storage container is used to collect and temporarily store the separated water, providing sufficient volume to avoid frequent discharge. The cylinder is used to convert the energy of compressed air into mechanical motion to drive the valve opening and closing. The negative pressure self-priming valve is used to automatically seal under negative pressure conditions to prevent gas leakage. When the pneumatic control is triggered, the valve opens to discharge the water.
[0008] Preferably, a filter screen is installed inside the filter container. The filter container is located downstream of the water inlet, and the water inlet is welded to the filter container. The filter screen is snapped together with the filter container to perform impurity interception.
[0009] Preferably, a gas extraction and drainage pipe is provided on one side of the negative pressure self-priming valve. The gas extraction and drainage pipe is used to safely discharge the water accumulated in the drain after separation into the water tank, while ensuring that the negative pressure in the extraction pipeline is not destroyed and that the gas does not leak.
[0010] Preferably, the cylinder is directly connected to the drive rod of the negative pressure self-priming valve, and a pneumatic control valve is provided below the cylinder. The pneumatic control valve is used to control the airflow direction and adjust the cylinder's movement.
[0011] Preferably, a compressed air pipe is installed below the pneumatic control valve. The compressed air pipe is used to transport the compressed air inherent in the coal mine, drive the cylinder to open the negative pressure self-priming valve, and automatically release water.
[0012] Preferably, a transparent water level gauge is installed on the outside of the filter container. The transparent water level gauge is connected to the filter container by threads and is used to visually display the water level height inside the filter container.
[0013] Preferably, a mounting bracket is provided on one side of the filter container, and the filter container is connected to the support structure inside the belt through the mounting bracket.
[0014] Preferably, a pneumatically controlled water discharge device for a belt conveyor inside a pumping pipeline includes the following steps during operation: S11: Under the negative pressure of the extraction system, the device automatically completes the introduction of gas-water mixture into the pipeline, gas-water separation, impurity filtration, gas return, and safe temporary storage of accumulated water; S12: Powered by an external compressed air system, it drives the cylinder to open the drain valve, using pressure difference and gravity to quickly discharge the temporarily stored water, and automatically resets to restore the system seal after completion.
[0015] Preferably, the following steps are included when collecting and storing accumulated water: S21: Moisture-rich methane gas, driven by the negative pressure of the extraction system, enters the device through the water inlet welded above the filter container. The inlet is directly connected to the main extraction pipeline inside the conveyor belt, ensuring that the accumulated water at the mining face can be continuously collected. S22: After entering the filter container, due to the sudden increase in the cross-sectional area of the flow channel, the gas velocity decreases significantly. Under the action of gravity, the denser water droplets and some solid particles separate from the gas due to inertia and settle to the bottom of the container, thus initially achieving gas-water separation; S23: Before flowing to the outlet, the fluid after preliminary separation must pass through a filter screen installed inside the filter container. This screen is designed for easy replacement with a snap-fit connection and effectively traps fine solid impurities such as coal dust and rock dust carried in the mixture, preventing them from entering subsequent components and causing valve blockage or wear. S24: After settling and filtration, the relatively dry methane gas is drawn in by the main negative pressure of the system and flows back into the main extraction pipeline through the connecting pipe between the filter container and the extended storage container, and is then transported to the surface methane utilization system; S25: The separated liquid water, under the influence of gravity, drips or flows along the wall into the extended storage container connected to the side of the filter container; S26: The water level accumulated in the extended storage container can be displayed using a transparent water level gauge. Operators can remotely observe the water accumulation inside the device from a safe position outside the conveyor belt. S27: Throughout the collection phase, the negative pressure self-priming valve installed at the drain outlet of the extended storage container remains tightly closed under the influence of the negative pressure inside the extraction pipeline and the pressure difference between the inside and outside of the container, ensuring that gas does not leak from the drain outlet.
[0016] Preferably, the pneumatic control and automatic drainage include the following steps: S31: When the water level is observed to have reached the predetermined high level through the transparent water level gauge, the operator triggers a command to switch the pneumatic control valve installed below the cylinder; S32: After the pneumatic control valve reverses, the constant-pressure compressed air from the underground compressed air network of the coal mine, which is transported through the compressed air pipe, is guided to the air inlet of the cylinder through the outlet pipe of the pneumatic control valve; S33: Compressed air enters the rodless chamber of the cylinder, pushing the piston inside to move linearly against the spring force or reverse air pressure. The extension or retraction of the piston rod is converted into the mechanical force to open the valve through a mechanism directly connected to the valve stem of the negative pressure self-priming valve. S34: The cylinder pulls open the valve core of the negative pressure self-priming valve, separating it from its valve seat, forming a flow path from the inside of the extended storage container to the gas extraction drain pipe; S35: After the negative pressure self-priming valve is opened, the extended storage container is connected to the air through the gas extraction and drainage pipe. At this time, under the combined action of the static pressure formed by the water level in the container and the negative pressure of the extraction pipeline, the accumulated water is quickly forced in and discharged into the water tank through the gas extraction and drainage pipe. S36: After observing that the water level gauge shows that the water level has dropped to a safe low level, the control signal is canceled, the pneumatic control valve reverses again, cuts off the compressed air supply to the cylinder, and exhausts the air from the rod chamber. The piston rod of the cylinder is reset under the drive of the internal spring or reverse air pressure, which drives the valve core of the negative pressure self-priming valve to return to the closed position; S37: After the negative pressure self-priming valve is closed, its valve core is tightly fitted to the valve seat under the mechanical force and the negative pressure adsorption force gradually restored by the extraction system. The device returns to its initial state and waits for the next water collection cycle.
[0017] The beneficial effects of this invention are: Existing drainage devices struggle to maintain the necessary closed negative pressure environment for gas extraction pipelines during drainage operations. The moment drainage begins, the pipeline system is directly or indirectly connected to the outside atmosphere, causing a large amount of gas to leak into the roadway air. This not only wastes energy and causes potential air pollution but also directly disrupts the negative pressure stability of the extraction system, leading to a sharp drop in extraction efficiency. The extracted gas concentration is diluted by the air, affecting subsequent gas utilization. Furthermore, conventional valves are prone to incomplete closure or leaks after drainage, creating a persistent leakage point after closure, further complicating the extraction process. The extraction system operates under incomplete conditions for extended periods. In this solution, during the water collection and storage phase, the system relies on the negative pressure generated inside the extraction pipeline and the valve core itself to remain firmly adhered to the valve seat, forming a self-sealing mechanism. This ensures the airtightness of the extraction system during non-drainage periods. When drainage is required, the valve opens under pneumatic force, but the pressure inside the storage container remains balanced with the ambient pressure. The water is discharged primarily by gravity and instantaneous pressure difference, minimizing the window period for gas leakage. After the drainage command is completed, the valve and the newly established pipeline negative pressure work together to quickly close, achieving a seal. Attached Figure Description
[0018] Figure 1 The diagram shown is a schematic diagram of the plan structure of a pneumatically controlled water discharge device for an extraction pipeline on the inner side of a belt, according to the present invention. Explanation of reference numerals in the attached drawings: 1. Filter container; 2. Water inlet; 3. Transparent water level gauge; 4. Extended storage container; 5. Cylinder; 6. Compressed air pipe; 7. Gas extraction and drainage pipe; 8. Negative pressure self-priming valve; 9. Mounting bracket; 10. Pneumatic control valve. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0020] Please see Figure 1 The present invention provides an embodiment of a pneumatically controlled water discharge device for a conveyor belt inner side extraction pipeline, comprising a filter container 1, a water inlet 2, an extended storage container 4, a cylinder 5, and a negative pressure self-priming valve 8. The water inlet 2 is provided above the filter container 1, the extended storage container 4 is provided on one side of the filter container 1, the cylinder 5 is provided inside the extended storage container 4, and the negative pressure self-priming valve 8 is provided on one side of the extended storage container 4.
[0021] Preferably, the filter container 1 is used as a primary treatment unit to separate gas and water using the principle of gravity sedimentation, while intercepting solid impurities. The water inlet 2 is used to introduce the mixture of water and gas in the extraction pipeline. The extended storage container 4 is used to collect and temporarily store the separated water, providing sufficient volume to avoid frequent discharge. The cylinder 5 is used to convert the energy of compressed air into mechanical motion to drive the valve opening and closing. The negative pressure self-priming valve 8 is used to automatically seal under negative pressure conditions to prevent gas leakage. When the pneumatic control is triggered, the valve opens to discharge the water.
[0022] Preferably, a filter screen is installed inside the filter container 1. The filter container 1 is located downstream of the water inlet 2. The water inlet 2 is welded to the filter container 1, and the filter screen is snap-fitted to the filter container 1 to perform impurity interception.
[0023] Preferably, a gas extraction and drainage pipe 7 is provided on one side of the negative pressure self-priming valve 8. The gas extraction and drainage pipe 7 is used to safely discharge the water accumulated in the drain after separation into the water tank, while ensuring that the negative pressure in the extraction pipeline is not destroyed and that the gas does not leak.
[0024] Preferably, the cylinder 5 is directly connected to the drive rod of the negative pressure self-priming valve 8, and a pneumatic control valve 10 is provided below the cylinder 5. The pneumatic control valve 10 is used to control the airflow direction and adjust the action of the cylinder 5.
[0025] Preferably, a compressed air pipe 6 is provided below the pneumatic control valve 10. The compressed air pipe 6 is used to transport the compressed air inherent in the coal mine, drive the cylinder 5 to open the negative pressure self-priming valve 8, and automatically release water.
[0026] Preferably, a transparent water level gauge 3 is provided on the outside of the filter container 1. The transparent water level gauge 3 is connected to the filter container 1 by threads and is used to visually display the water level height inside the filter container 1.
[0027] Preferably, a mounting bracket 9 is provided on one side of the filter container 1, and the filter container 1 is connected to the support structure inside the belt through the mounting bracket 9.
[0028] Preferably, a pneumatically controlled water discharge device for a belt conveyor inside a pumping pipeline includes the following steps during operation: S11: Under the negative pressure of the extraction system, the device automatically completes the introduction of gas-water mixture into the pipeline, gas-water separation, impurity filtration, gas return, and safe temporary storage of accumulated water; S12: Powered by an external compressed air system, it drives cylinder 5 to open the drain valve, using pressure difference and gravity to quickly discharge the temporarily stored water, and automatically resets to restore the system seal after completion.
[0029] Preferably, the following steps are included when collecting and storing accumulated water: S21: Moisture-rich methane gas, driven by the negative pressure of the extraction system, enters the device through the water inlet 2 welded above the filter container 1. The inlet is directly connected to the extraction main pipeline inside the conveyor belt, ensuring that the accumulated water at the mining face can be continuously collected. S22: After entering the filter container 1, due to the sudden increase in the cross-sectional area of the flow channel, the gas velocity decreases significantly. Under the action of gravity, the denser water droplets and some solid particles separate from the gas due to inertia and settle to the bottom of the container, thus initially achieving gas-water separation; S23: Before flowing to the outlet, the fluid after preliminary separation must pass through a filter screen installed inside the filter container 1, which is easy to replace with a snap-fit connection. This filter screen effectively traps fine solid impurities such as coal dust and rock dust carried in the mixture, preventing them from entering subsequent components and causing valve blockage or wear. S24: After settling and filtration, the relatively dry methane gas is drawn in by the main negative pressure of the system and flows back into the main extraction pipeline through the connecting pipe between the filter container 1 and the extended storage container 4, and is then transported to the surface methane utilization system; S25: The separated liquid water, under the action of gravity, drips or flows along the wall into the extended storage container 4 connected to the side of the filter container 1; S26: The water level accumulated in the extended storage container 4 can be displayed using the transparent water level gauge 3. Operators can remotely observe the water accumulation inside the device from a safe position outside the belt. S27: Throughout the collection phase, the negative pressure self-priming valve 8 installed at the drain outlet of the extended storage container 4 remains tightly closed under the influence of the negative pressure inside the extraction pipeline and the pressure difference between the inside and outside of the container, ensuring that gas does not leak from the drain outlet.
[0030] Preferably, the pneumatic control and automatic drainage include the following steps: S31: When the water level is observed to have reached the predetermined high level through the transparent water level gauge 3, the operator triggers a command to switch the pneumatic control valve 10 installed below the cylinder 5; S32: After the pneumatic control valve 10 reverses, the constant pressure compressed air from the underground compressed air network of the coal mine, which is transported through the compressed air pipe 6, is guided to the air inlet of the cylinder 5 through the outlet pipeline of the pneumatic control valve 10; S33: Compressed air enters the rodless chamber of cylinder 5, pushing the piston inside to move linearly against the spring force or reverse air pressure. The extension or retraction of the piston rod is converted into the mechanical force to open the valve through a mechanism directly connected to the valve stem of the negative pressure self-priming valve 8. S34: Cylinder 5 pulls open the valve core of the negative pressure self-priming valve 8, separating it from its valve seat, forming a flow path from the inside of the extended storage container 4 to the gas extraction drain pipe 7; S35: After the negative pressure self-priming valve 8 is opened, the inside of the extended storage container 4 is connected to the air through the gas extraction and drainage pipe 7. At this time, under the combined action of the static pressure formed by the water level in the container and the negative pressure of the extraction pipeline, the accumulated water is quickly forced in and discharged into the water tank through the gas extraction and drainage pipe 7. S36: After observing that the water level gauge 3 shows that the water level has dropped to a safe low level, the control signal is canceled, the pneumatic control valve 10 reverses again, cuts off the compressed air supply to the cylinder 5, and exhausts the air from its rod chamber. The piston rod of the cylinder 5 is reset under the drive of the internal spring or reverse air pressure, which drives the valve core of the negative pressure self-priming valve 8 to return to the closed position; S37: After the negative pressure self-priming valve 8 is closed, its valve core is tightly fitted to the valve seat under the mechanical force and the negative pressure adsorption force gradually restored by the extraction system, and the device returns to its initial state, waiting for the next water collection cycle.
[0031] Example 1 Background: During the excavation of two roadways in a coal mine, a large amount of water was generated in the gas extraction borehole of the coal seam. The water accumulated in the gas extraction pipeline located inside the conveyor belt, which seriously threatened the stable operation of the extraction system. In order to solve the problem of the extremely high safety risk caused by manually draining water by crossing the conveyor belt and the production capacity loss caused by emergency shutdown, the device described in this embodiment is applied to this scenario.
[0032] Implementation method: First, near the heavily waterlogged gas collection pipeline on the inside of the conveyor belt, use the mounting bracket 9 to reliably fix the main body of the device to the side of the roadway or a solid support structure to ensure its stability. Then, connect the water inlet 2 at the top of the device to the reserved interface of the gas collection pipeline through a flange, so that the gas-water mixture can be directly introduced into the device. Next, connect one end of the gas drainage pipe 7 to the outlet of the negative pressure self-priming valve 8, and reliably introduce the other end into the water tank or drainage ditch in the roadway. Finally, connect the compressed air pipe 6 to the existing compressed air network of the mine and provide an air source for the pneumatic control valve 10, thus completing the installation of the entire device and the connection of the medium pipeline.
[0033] Moisture-rich gas, driven by the negative pressure of the extraction system, enters the filter container 1 through the inlet 2. Due to the sudden expansion of the flow channel cross-sectional area, the gas flow rate slows down. The mixed fluid undergoes initial separation in the filter container 1 based on the principle of vacuum gravity sedimentation. The denser water droplets and some solid particles settle downwards. Subsequently, the fluid passes through the filter screen connected by snaps inside the filter container 1, where fine impurities such as coal dust and rock dust are effectively intercepted. The relatively dry gas after filtration is drawn away by the negative pressure of the main extraction pipeline through the connecting pipe between the filter container 1 and the extended storage container 4, and continues to be transported. The separated liquid water drips or flows along the wall into the extended storage container 4 for temporary storage. During this entire collection stage, the operator can safely observe the water level through the threaded transparent water level gauge 3 on the outside of the belt. At the same time, thanks to the negative pressure inside the extraction pipeline, the valve core of the negative pressure self-priming valve 8 is tightly adsorbed on the valve seat, keeping it closed and sealed to prevent gas leakage.
[0034] When the water level in the extended storage container 4 reaches the predetermined high level as observed by the transparent water level gauge 3, the operator triggers a command from a safe position outside the belt, causing the pneumatic control valve 10 to switch. Compressed air is then delivered from the compressed air pipe 6 through the switched pneumatic control valve 10 to the air inlet of the cylinder 5. The compressed air drives the piston rod inside the cylinder 5 to move linearly. This movement is converted into a strong pulling force through the mechanism directly connected to the valve stem of the negative pressure self-priming valve 8, overcoming the negative pressure suction force and forcibly pulling the valve core open, causing it to detach from the valve seat. This opens a flow path from the inside of the extended storage container 4 to the gas extraction drain pipe 7. After the valve is opened, the extended storage container 4 is briefly connected to the atmosphere through the gas extraction drain pipe 7. Under the combined action of the static pressure of the water column inside the container and the negative pressure of the extraction pipeline, the accumulated water is quickly forced in and discharged into the water tank through the gas extraction drain pipe 7. After the water level is observed to drop to a safe low level, the operator cancels the control signal, the pneumatic control valve 10 is reset, the compressed air supply to the cylinder 5 is cut off and the air is exhausted. Under the action of the internal return spring, the piston rod of the cylinder 5 drives the valve core of the negative pressure self-priming valve 8 to return and tightly fit the valve seat. The device returns to the initial sealing state and waits for the next working cycle.
[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A belt inside pneumatic control extraction line drain device; characterized by: The utility model relates to a kind of belt inside pneumatic control extraction pipeline water collector device, when working, including the following steps:
2. A belt inside pneumatic control extraction line water drainer device according to claim 1, characterized in that: S11: device is automatically completed to the introduction of gas-water mixture in pipeline, gas-water separation, impurity filtration, gas reflux and the safe temporary storage of accumulated water under the negative pressure effect of extraction system; 3. A belt inside pneumatic control extraction line water drainer device according to claim 1 characterized in that: S12: power is provided by external compressed air system, drive cylinder (5) opens drain valve, and the temporarily stored accumulated water is quickly discharged using pressure difference and gravity, and is automatically reset to restore system seal after completion.
4. A belt inside pneumatic control extraction line water drainer device according to claim 1 characterized in that: When collecting and storing accumulated water, including the following steps:
5. A belt inside pneumatic control extraction line water drainer device according to claim 4, characterized in that: S21: water-rich gas is driven by the negative pressure of the extraction system, enters the device through the water inlet pipe (2) welded above the filter container (1), the inlet is directly connected to the extraction main pipeline on the inside of the belt, ensuring that the accumulated water on the mining face can be continuously collected; 6. A belt inside pneumatic control extraction line water drainer device according to claim 1 characterized in that: S22: after entering the filter container (1), due to the sudden increase in flow area, the gas flow rate decreases significantly, and the water droplets and part of the solid particles with higher density are separated from the gas due to inertia and gravity, and settle to the bottom of the container, preliminarily achieving gas-water separation; 7. A belt inside pneumatic control extraction line water drainer device according to claim 1 characterized in that: 8. A belt inner side pneumatic control extraction pipeline drain device according to any one of claims 1-7, characterized in that: 9. A belt inside pneumatic control extraction line water drainer device according to claim 8 characterized in that: S23: After the initial separation of the fluid, before flowing to the outlet, it must pass through the filter screen installed inside the filter container (1), which is connected by buckle for easy replacement. The filter screen effectively traps fine solid impurities such as coal dust and rock dust carried in the mixed liquid, preventing them from entering the subsequent components and causing valve blockage or wear; S24: After settling and filtering, the relatively dry gas gas is drawn into the main extraction pipeline by the communication pipeline between the filter container (1) and the extended storage container (4) under the main negative pressure of the system, and is transported to the ground gas utilization system; S25: The separated liquid water drips or flows along the wall into the extended storage container (4) connected to the side of the filter container (1) under the action of gravity; S26: The water level accumulated in the extended storage container (4) can be displayed by the transparent water level gauge (3), and the operator can observe the internal water accumulation from a safe position outside the belt; S27: During the entire collection stage, the negative pressure self-suction valve (8) installed at the drain outlet of the extended storage container (4) is always in a tightly closed state under the action of the internal negative pressure of the extraction pipeline and the pressure difference between the inside and outside of the container, ensuring that the gas does not leak from the drain.
10. A belt inside pneumatic control extraction line water drainer device according to claim 8 characterized in that: When performing pneumatic control and automatic drainage, the following steps are included: S31: When the water level reaches the predetermined high level through the transparent water level gauge (3), the operator triggers the command to reverse the pneumatic control valve (10) installed below the air cylinder (5); S32: After the pneumatic control valve (10) is reversed, the constant pressure compressed air from the coal mine underground pressure pipe network is introduced into the air inlet of the air cylinder (5) through the outlet pipeline of the pneumatic control valve (10); S33: The compressed air enters the rodless cavity of the air cylinder (5), pushing the internal piston to move linearly against the spring force or reverse air pressure. The extension or contraction of the piston rod is converted into mechanical force to open the valve through the mechanism directly connected to the valve stem of the negative pressure self-suction valve (8); S34: The air cylinder (5) pulls the valve core of the negative pressure self-suction valve (8) away from its valve seat, forming a flow path from the inside of the extended storage container (4) to the gas extraction and drainage pipe (7); S35: After the negative pressure self-suction valve (8) is opened, the inside of the extended storage container (4) is connected to the air through the gas extraction and drainage pipe (7). At this time, under the combined action of the static pressure formed by the water level height in the container and the negative pressure of the extraction pipeline, the accumulated water flow is quickly pressed into and through the gas extraction and drainage pipe (7), and quickly discharged into the sump; S36: After observing that the water level gauge (3) displays that the water level has dropped to a safe low level, the control signal is canceled, the pneumatic control valve (10) is reversed again, the compressed air supply to the air cylinder (5) is cut off, and the rod cavity is exhausted. The piston rod of the air cylinder (5) is driven by the internal spring or reverse air pressure to reset, and the valve core of the negative pressure self-suction valve (8) returns to the closed position; S37: After the negative pressure self-suction valve (8) is closed, the valve core is tightly attached to the valve seat under the mechanical force and the gradually restored negative pressure suction force of the extraction system, and the device returns to the initial state, waiting for the next water collection cycle.