Intelligent coal mine gas extraction device

Abstract

The utility model provides an intelligent coal mine gas extraction device which comprises an extraction pipeline, a gas collecting tank and an automatic control device, one end of the extraction pipeline is provided with an extraction pipe opening, the other end of the extraction pipeline is communicated with the gas collecting tank, and the automatic control device is fixed to the side, away from the extraction pipeline, of the gas collecting tank. The automatic control device comprises a pressure sensor and a controller, the pressure sensor is used for collecting pressure in the gas collecting tank, an electric valve is arranged at the extraction pipe opening, and the electric valve is in electric signal connection with the controller. According to the utility model, the gas collecting tank is arranged on the extraction pipeline, the gas concentration and the extraction negative pressure in the gas collecting tank are detected through the pressure sensor, and the opening of the electric valve is controlled through the controller, so that the real-time monitoring and automatic adjustment of the single-hole negative pressure are realized, and the extraction efficiency and the safety are improved.

Description

Technical Field

[0001] This utility model relates to the field of coal mine gas extraction technology, and in particular to an intelligent coal mine gas extraction device. Background Technology

[0002] Coalbed methane, commonly known as coal gas, is both a valuable energy resource in my country and a major hidden danger to coal mine safety. During coal mining, the accumulation of methane not only affects the safety of coal mine production but also poses a threat to the health of workers.

[0003] In the process of underground gas drainage in coal mines, drainage efficiency is affected by a variety of factors, among which excessively low drainage negative pressure is a key issue. Mines typically use overall negative pressure regulation, but traditional methods cannot meet the precise requirements of individual well negative pressure, leading to reduced drainage efficiency. To solve this problem, a new type of gas drainage device is urgently needed, capable of intelligently regulating the negative pressure of individual wells, thereby improving gas drainage efficiency.

[0004] In view of this, the inventor has designed a smart coal mine gas extraction device, which leads to this invention. Utility Model Content

[0005] To solve the above problems, the technical solution of this utility model is as follows:

[0006] A smart coal mine gas extraction device is characterized by comprising an extraction pipeline, a gas collection tank, and an automatic control device. One end of the extraction pipeline has an extraction port, and the other end is connected to the gas collection tank. The automatic control device includes a pressure sensor and a controller. The side wall of the gas collection tank has a sensor opening. The detection end of the pressure sensor extends into the gas collection tank through the sensor opening and is fixedly connected to the gas collection tank. An electric valve for controlling the flow rate of the extracted gas is provided at the extraction port, and the electric valve is electrically connected to the controller.

[0007] Preferably, one end of the gas collecting tank is connected to a manifold, and the end of the manifold away from the gas collecting tank has a protrusion.

[0008] Preferably, the electric valve is a regulating valve, fixed to the extraction pipe opening and connected to the extraction pipe opening.

[0009] Preferably, the extraction pipe is a circular pipe, and the outer wall of the extraction pipe is fitted with a heat insulation layer.

[0010] Preferably, the outer wall of the insulation layer is fitted with an explosion-proof device.

[0011] Preferably, the automatic control device further includes a concentration sensor, the detection end of which extends through a sensor opening into the gas collection tank and is fixedly connected to the gas collection tank, and the concentration sensor is electrically connected to the explosion-proof device.

[0012] Preferably, the explosion-proof device is longer than the extraction pipeline, and the explosion-proof device and the end of the extraction pipeline away from the gas collection tank form a fixed groove, and the electric valve is located in the fixed groove and is fixedly connected to the extraction pipe opening.

[0013] Preferably, the explosion-proof device is an intrinsically safe explosion-proof device for mining.

[0014] Preferably, the gas collection tank, extraction pipeline, and electric valve are connected by flanges in sequence.

[0015] The technical solution provided by this utility model has the following beneficial effects:

[0016] 1. This utility model achieves real-time monitoring and automatic adjustment of single-hole negative pressure by setting a gas collection tank on the extraction pipeline, detecting the extraction negative pressure in the gas collection tank through a pressure sensor, and then controlling the opening of the electric valve through a controller, thereby improving extraction efficiency and safety.

[0017] 2. This utility model incorporates an explosion-proof device on the outside of the extraction pipeline and a concentration sensor on the gas collection tank. By detecting the gas concentration, the explosion-proof device can be automatically activated when necessary, reducing the risk of gas explosion and ensuring the safety of miners.

[0018] 3. This utility model reduces the temperature loss of gas during pipeline transmission and minimizes its impact on the environment by installing a heat insulation layer on the outer wall of the extraction pipeline. Attached Figure Description

[0019] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0020] in:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 yes Figure 1 A magnified view of the structure at point A in the middle;

[0023] Figure 3 This is a structural schematic diagram of the interface of the extraction pipeline in this utility model.

[0024] Label Explanation:

[0025] 1. Extraction pipeline; 2. Gas collection tank; 3. Automatic control device; 31. Concentration sensor; 32. Pressure sensor; 33. Controller; 4. Extraction pipe inlet; 5. Electric valve; 6. Manifold; 61. Protrusion; 7. Insulation layer; 8. Explosion-proof device; 81. Fixing groove. Detailed Implementation

[0026] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0027] Please see Figures 1 to 3 This is a preferred embodiment of a coal mine gas intelligent extraction device, comprising an extraction pipeline 1, a gas collection tank 2, and an automatic control device 3. One end of the extraction pipeline 1 has an extraction port 4, and the other end is connected to the gas collection tank 2. The automatic control device 3 is fixed to the side of the gas collection tank 2 away from the extraction pipeline 1. The automatic control device 3 includes a pressure sensor 32 and a controller 33. The detection end of the pressure sensor 32 extends into the gas collection tank 2 through a sensor opening and is directly installed on the opening via threads or a flange. An explosion-proof sealing gasket is required at the interface to ensure airtightness and explosion-proof safety. The device is used to collect the pressure inside the gas collection tank 2. An electric valve 5 is provided at the extraction port 4, and the electric valve 5 is connected to the controller. In this invention, an electric actuator is provided on the side of the electric valve 5. The electric actuator is electrically connected to the controller 33 to regulate the electric valve 5. The combination of the electric valve 5 and the controller 33 achieves precise control, ensuring that the extraction negative pressure is stable within the set range. The controller 33 is connected to the electric actuator via an electrical signal, resulting in fast response and high adjustment accuracy. The pressure sensor 32 is connected to the gas collection tank 2 to monitor the pressure inside the tank in real time, preventing excessively high or low pressure. The electric valve 5 and the electric actuator meet explosion-proof requirements and are suitable for flammable and explosive environments. The electric valve 5 and the electric actuator are installed outside the extraction pipe port 4 for easy inspection and maintenance. The automatic control device 3 is centrally arranged, reducing maintenance workload and improving work efficiency.

[0028] In this invention, the extraction pipe 1 is a PVC pipe, which has a certain degree of flexibility to prevent the extraction pipe 1 from breaking or dislodging, while avoiding the impact of pipe gaps on fluid flow and reducing the risk of gas leakage. The pressure sensor 32 is connected to the gas collection tank 2 and can detect the extraction negative pressure inside in real time. The controller 33 is a PLC controller, which is connected to the electric actuator via electrical signals. The electric actuator drives the opening of the electric valve 5. The pressure sensor 32 detects the extraction negative pressure inside the gas collection tank 2. The PLC controller collects the data transmitted by the pressure sensor 32, compares and analyzes it with the preset standard negative pressure, and issues adjustment commands. If the detected negative pressure is within the standard range, the controller will adjust the pressure accordingly. When the pressure value is lower than the standard value, the PLC controller determines that the negative pressure needs to be increased and sends a signal. The electric actuator opens the electric valve 5, increasing the opening degree of the electric valve 5. After the opening degree of the electric valve 5 is increased, the gas flow rate increases, and the extraction negative pressure increases accordingly, stabilizing the extraction speed and improving extraction efficiency. The PLC controller continuously monitors the adjusted negative pressure value to ensure that it remains stable within the standard range. The PLC controller records sensor data and the adjustment process for subsequent analysis and optimization. It supports remote monitoring and data transmission, realizing intelligent management. By installing pressure sensor 32 and controller 33, real-time monitoring and automatic adjustment of single-hole negative pressure can be achieved, improving extraction efficiency and safety.

[0029] Please refer to Figure 1 One end of the gas collection tank 2 is connected to a manifold 6. The end of the manifold 6 away from the gas collection tank 2 has a protrusion 61. All gas extracted from the single hole in the well through the extraction pipe needs to be connected to the manifold 6 to be collected and stored in the gas pumping station above ground. The protrusion 61 facilitates better connection when the manifold 6 is connected to the gas pumping station above ground. At the same time, the structure of the protrusion 61 is used to guide the gas flow. The manifold 6 is directly connected to the gas collection tank 2, which is simple in structure and easy to install. In addition, the design of the manifold 6 can balance the gas pressure and prevent the pressure in the gas collection tank 2 from being too high or too low, which is convenient for the controller 33 to adjust. This allows the system to operate efficiently, safely and stably during the gas extraction process, while reducing operating costs.

[0030] Please refer to Figures 1 to 3 The electric valve 5 is a regulating valve, fixed to and connected to the extraction pipe port 4. The regulating valve can precisely control the flow rate by changing the opening degree of the valve core, thereby achieving precise adjustment of the negative pressure of single-hole extraction. When used in conjunction with the controller 33, the valve opening can be dynamically adjusted according to real-time monitoring data to ensure that the negative pressure is stable within the set range. The electric actuator of the regulating valve has a fast response speed and can quickly adjust the valve opening according to the instructions of the controller 33. The regulating valve has good sealing performance and can effectively prevent gas leakage. The regulating valve can adapt to different flow and pressure requirements and is suitable for complex geological conditions and variable gas concentrations.

[0031] Please refer to Figures 1 to 3 The extraction pipeline 1 is a circular pipe, and a heat insulation layer 7 is installed on the outer wall of the extraction pipeline 1. The heat insulation layer 7 can effectively reduce the heat loss of gas inside the extraction pipeline 1, maintain the gas temperature stably, and in high-temperature environments, the heat insulation layer 7 can block the transfer of external heat to the inside of the pipeline, prevent the gas temperature from becoming too high, avoid the risk of pipeline material aging or gas explosion caused by high temperature, improve the safety of the working environment, ensure personnel safety, and reduce the probability of safety accidents. This enables the system to operate efficiently, safely, and stably during the gas extraction process, while reducing operating costs and adapting to the needs of complex mining environments.

[0032] Please refer to Figures 1 to 3 An explosion-proof device 8 is installed on the outer wall of the insulation layer 7. The explosion-proof device 8 is directly installed on the outer wall of the insulation layer 7. It is easy to operate, maintain and replace. The equipment has a simple structure and low failure rate. It improves the reliability and stability of the system while reducing equipment failure and downtime, and improves production efficiency.

[0033] Specifically, the explosion-proof device 8 is an intrinsically safe explosion-proof device for mining. This device limits the energy (voltage, current, and power) in the circuit to ensure that even in a fault condition, no sparks or high temperatures sufficient to ignite explosive gases are generated. In the circuit design, Zener diodes are used to limit voltage, and resistors are used to limit current, while also transmitting low-energy signals such as sensor and control signals. During signal transmission, the energy of the circuit is always limited within a safe range, so even if the circuit is short-circuited or open-circuited, no danger will occur. Furthermore, the concentration sensor 31 and pressure sensor 32 monitor the changes in gas concentration and pressure in the gas collection tank 2 in real time. If an abnormality is detected, the equipment will trigger an alarm or automatically cut off the power supply to ensure safety during the extraction process. The intrinsically safe explosion-proof device 8 ensures safe operation in flammable and explosive environments by limiting the energy of the circuit. Its workflow includes energy limiting, signal transmission, and fault protection, and it is widely used in sensors, communication equipment, and control systems. Intrinsically safe equipment has advantages such as high safety and high reliability, and is an important guarantee for safe production in mines.

[0034] Please refer to Figure 1The automatic control device 3 also includes a concentration sensor 31. The detection end of the concentration sensor 31 extends into the gas collection tank 2 through a sensor opening and is directly installed on the opening via threads or a flange. An explosion-proof sealing gasket must be installed at the interface to ensure airtightness and explosion-proof safety. The concentration sensor 31 is connected to the gas collection tank 2 to collect the methane concentration within the tank. The concentration sensor 31 is electrically connected to the explosion-proof device 8. The concentration sensor 31 monitors the methane concentration in the gas collection tank 2 in real time, providing accurate data support. The electrical connection to the explosion-proof device 8 ensures the real-time nature and reliability of the monitoring data. When the methane concentration exceeds the safety threshold, the explosion-proof device 8 can automatically activate protective measures. Simultaneously, the concentration sensor 31 provides methane concentration data, and the controller 33 can dynamically adjust the extraction negative pressure according to concentration changes.

[0035] Please refer to Figures 1 to 3. The explosion-proof device 8 is longer than the extraction pipeline 1. The explosion-proof device 8 and the end of the extraction pipeline 1 furthest from the gas collection tank 2 form a fixed groove 81. The electric valve 5 is placed in the fixed groove 81 and is fixedly connected to the extraction pipe port 4. The explosion-proof device 8 and the end of the extraction pipeline 1 furthest from the gas collection tank 2 form a fixed groove 81. The electric valve 5 is located in the fixed groove 81 and is fixedly connected to the extraction pipe port 4. The explosion-proof device 8 and the extraction pipeline 1 are integrated together through the fixed groove 81, resulting in a compact structure and saving space. The electric valve 5 is directly placed in the fixed groove 81 and fixedly connected to the extraction pipe port 4, reducing additional connecting parts. This not only reduces the equipment footprint, making it suitable for mining environments with limited space, but also simplifies the installation process and improves installation efficiency. The design of the fixed groove 81 allows the electric valve 5 and the explosion-proof device to be integrated together. The installation position of device 8 is fixed, which facilitates alignment and connection. During maintenance, only the fixing groove 81 needs to be opened to inspect and replace the electric valve 5 or the explosion-proof device 8, reducing installation and maintenance costs. The explosion-proof device 8 is tightly connected to the extraction pipeline 1 through the fixing groove 81 to ensure sealing and prevent gas leakage. The electric valve 5 is placed in the fixing groove 81 and is protected by the explosion-proof device 8 to avoid damage caused by external impact or environmental factors. The design of the fixing groove 81 reduces gas leakage and improves extraction efficiency. The integrated design of the explosion-proof device 8 and the electric valve 5 can reduce energy consumption.

[0036] Please refer to Figures 1 through 3. The gas collection tank 2, extraction pipeline 1, and electric valve 5 are connected by flanges in sequence. The flange connection uses bolts for fastening and gaskets to effectively prevent gas leakage. Under high pressure and high flow rate conditions, the flange connection can still maintain good sealing performance, effectively preventing gas leakage and pipeline detachment, and improving system safety.

[0037] The implementation principle of the intelligent coal mine gas extraction device provided by this utility model is as follows: During gas extraction, the gas enters the extraction channel through the borehole and then enters the gas collection tank 2. During this period, the heat insulation layer 7 reduces the temperature loss of the gas. The sensor detects the gas concentration and pressure and then transmits the detection data to the controller 33. The controller 33 has a preset standard pressure and analyzes and compares the data transmitted by the sensor. When the extraction negative pressure is detected to be less than the standard pressure, the controller 33 sends a signal to make the electric actuator open the electric valve 5 to increase the flow rate. Conversely, it closes the electric valve 5 to reduce the flow rate. The controller 33 continuously monitors the adjusted negative pressure value to ensure that it is stable within the standard range. If the standard value is still not reached after adjustment, the controller 33 will make further adjustments until the negative pressure value meets the requirements.

[0038] In summary, this utility model, by setting a gas collection tank 2 on the extraction pipeline 1, using a pressure sensor 32 and a concentration sensor 31 to detect the gas concentration and extraction negative pressure in the gas collection tank 2, and then using a controller 33 to control the opening of the electric valve 5, achieves real-time monitoring and automatic adjustment of single-hole negative pressure, thereby improving extraction efficiency and safety.

[0039] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A smart coal mine gas extraction device, characterized in that: The system includes an extraction pipe (1), a gas collection tank (2), and an automatic control device (3). One end of the extraction pipe (1) has an extraction port (4), and the other end is connected to the gas collection tank (2). The automatic control device (3) includes a pressure sensor (32) and a controller (33). The side wall of the gas collection tank (2) has a sensor opening. The detection end of the pressure sensor (32) extends into the gas collection tank (2) through the sensor opening and is fixedly connected to the gas collection tank (2). An electric valve (5) for controlling the flow rate of the extracted gas is provided at the extraction port (4). The electric valve (5) is electrically connected to the controller (33).

2. The intelligent coal mine gas extraction device according to claim 1, characterized in that, One end of the gas collection tank (2) is connected to a manifold (6), and the end of the manifold (6) away from the gas collection tank (2) is provided with a protrusion (61).

3. The intelligent coal mine gas extraction device according to claim 1, characterized in that, The electric valve (5) is a regulating valve, fixed to the extraction pipe port (4) and connected to the extraction pipe port (4).

4. The intelligent coal mine gas extraction device according to claim 1, characterized in that, The extraction pipe (1) is a circular pipe, and the outer wall of the extraction pipe (1) is fitted with a heat insulation layer (7).

5. The intelligent coal mine gas extraction device according to claim 4, characterized in that, The outer wall of the insulation layer (7) is fitted with an explosion-proof device (8).

6. The intelligent coal mine gas extraction device according to claim 5, characterized in that, The automatic control device (3) also includes a concentration sensor (31). The detection end of the concentration sensor (31) extends into the gas collection tank (2) through the sensor opening and is fixedly connected to the gas collection tank (2). The concentration sensor (31) is electrically connected to the explosion-proof device (8).

7. The intelligent coal mine gas extraction device according to claim 5, characterized in that, The explosion-proof device (8) is longer than the extraction pipe (1). The explosion-proof device (8) and the end of the extraction pipe (1) away from the gas collection tank (2) form a fixed groove (81). The electric valve (5) is located in the fixed groove (81) and is fixedly connected to the extraction pipe opening (4).

8. The intelligent coal mine gas extraction device according to claim 5, characterized in that, The explosion-proof device (8) is an intrinsically safe explosion-proof device (8) for mining.

9. The intelligent coal mine gas extraction device according to claim 1, characterized in that, The gas collection tank (2), the extraction pipeline (1), and the electric valve (5) are connected by flanges in sequence.

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