An intelligent gas concentration control device and control method for high-gas coal mine recovery working face

Abstract

The present invention provides an intelligent control device for gas concentration in a high-gas coal mine recovery working face and a control method thereof. The intelligent control device for gas concentration in a high-gas coal mine recovery working face comprises a mounting base, and also comprises: a control mechanism, the control mechanism is arranged on the top of the mounting base, the control mechanism comprises a ventilation pipe and a guide pipe; a movable mechanism, the movable mechanism is arranged on one side of the mounting base, the guide pipe is slidably connected with the mounting base through the movable mechanism, and the movable mechanism is used to control the guide pipe to move inside the ventilation pipe; and a temperature control mechanism, the temperature control mechanism is arranged on the outer wall of the ventilation pipe, and is used to cooperate with the guide pipe controlled to move by the movable mechanism to cool the mine tunnel. The present invention enables the support plate to drive the guide pipe to move inside the ventilation pipe through the arrangement of the movable mechanism and the gas detection device, so as to change the position of extracting gas and prevent the gas concentration in different areas inside the mine tunnel from being inconsistent.

Description

Technical Field

[0001] The present invention belongs to the technical field of coal mine gas, and in particular relates to an intelligent gas concentration control device for a high-gas coal mine recovery working face and a control method thereof. Background Art

[0002] During the mining process of coal seams or mineral deposits, the working space where coal or minerals are directly mined is generally called the mining face or simply the mining area. Gas is a flammable and toxic gas. It is formed by the decomposition of organic matter in coal seams under long-term high temperature and high pressure. It often occurs during the coal mining process. It is a gas associated with the formation and metamorphism of coal. The permeability of gas is 1.6 times that of air. It is difficult to dissolve in water, does not support combustion, and cannot maintain breathing. When it reaches a certain concentration, it can cause people to suffocate due to lack of oxygen, and can cause combustion or explosion.

[0003] A Chinese patent with application number CN201911030134.7 discloses a device and method for accurately and quantitatively controlling the concentration of gas extraction. Based on the correlation between the gas extraction borehole leakage, the pure gas flow rate and the extracted gas concentration, the flow change function of the extracted gas mixture is determined by the derived gas pure flow rate exponential decay law and the set target gas concentration. Since the extraction negative pressure determines the flow rate of the extracted gas mixture, the extraction negative pressure is formed by the high-speed rotation of the explosion-proof fan blade driven by the pneumatic motor. The metering pump is accurately controlled by the controller, and then the amount of air injected into the pneumatic motor per unit time is controlled. The speed of the pneumatic motor can be accurately controlled, and finally the precise control of the extraction negative pressure is achieved. The invention eliminates the continuous and large fluctuations in gas concentration during the extraction process, so that the gas concentration is maintained near the target gas concentration C during the extraction process and is drained out, thereby ensuring the quantitative, controllable and stable output of the extracted gas concentration, and finally achieving safe and efficient utilization of gas.

[0004] During the coal mining process, gas in the coal seam is released, causing gas to accumulate inside the mining work space. It is necessary to monitor the gas concentration inside the mine in real time and regulate the emission of gas inside the mine. However, when the existing equipment is controlling the gas concentration, the extraction position remains unchanged, resulting in a high gas concentration at the beginning of the extraction equipment when extracting gas inside the mine, making it difficult to quickly extract gas in a constant time to reduce the gas concentration. After the extraction equipment has been working for a certain period of time, the gas concentration in the area is too low, and the extraction equipment will bring out the gas in the mine, affecting the working environment in the mine, and causing inconsistent gas concentrations in different areas of the mine, causing the gas detection device to have inaccurate detection accuracy when detecting gas concentration, affecting the operation of the extraction equipment, and causing the gas concentration inside the mine to quickly reach the threshold after the equipment stops working, which is not convenient for actual use. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the extraction position remains unchanged, resulting in inconsistent gas concentrations in different areas inside the mine.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A gas concentration intelligent control device for a high-gas coal mine recovery working face includes a mounting base and:

[0008] A regulating mechanism, the regulating mechanism is arranged on the top of the mounting base, the regulating mechanism comprises a ventilation pipe and a guide pipe, the outer wall of the guide pipe is fixedly connected with a plurality of discharge pipes, the ventilation pipe is fixedly connected to the top of the mounting base, and is used to connect to the outside to ventilate the inside of the mine tunnel, the guide pipe is slidably connected to the inside of the ventilation pipe, and is used to guide the gas inside the mine tunnel into the inside of the discharge pipe;

[0009] A movable mechanism, wherein the movable mechanism is arranged on one side of the mounting base, the guide tube is slidably connected to the mounting base via the movable mechanism, and the movable mechanism is used to control the guide tube to move inside the ventilation tube;

[0010] and a temperature control mechanism, wherein the temperature control mechanism is arranged on the outer wall of the ventilation pipe and is used to cooperate with the movable mechanism to control the movement of the guide pipe to cool the mine tunnel.

[0011] Preferably, the regulating mechanism also includes an air inlet pipe fixedly connected to the outer wall of the ventilation pipe, one end of the guide pipe located inside the ventilation pipe is fixedly connected to a first piston member, the first piston member is slidably connected to the inner wall of the ventilation pipe, a plurality of air outlets are formed on the outer wall of one end of the guide pipe close to the first piston member, the other end of the guide pipe is fixedly connected to a first filter plate, and one side of the first filter plate located inside the guide pipe is connected to a first fan.

[0012] Preferably, the inner wall of the ventilation pipe is fixedly connected with a fixing ring, the bottom of the fixing ring is fixedly connected with a connecting rod, one end of the connecting rod passing through the first piston member is fixedly connected with a cleaning ring, the connecting rod is sealingly and slidingly connected to the first piston member, the cleaning ring is located inside the guide pipe, the cleaning ring can contact with the inner wall of the guide pipe, and can clean the adsorbed matter on the inner wall of the guide pipe, the top of the ventilation pipe is connected with the outside world, the top of the ventilation pipe is fixedly connected with a second filter plate, and the second filter plate is located on one side inside the ventilation pipe and is connected to a second fan.

[0013] Preferably, a cooling cavity is provided between the outer wall of the guide pipe and the inner wall of the ventilation pipe, the number of the air outlets is consistent with the number of the discharge pipes, and the positions of the air outlets correspond one-to-one with the positions of the discharge pipes.

[0014] Preferably, the movable mechanism includes a driving motor, which is fixedly connected to a side of the mounting base close to the ventilation pipe, the output end of the driving motor is fixedly connected to a vertically arranged reciprocating screw, the other end of the reciprocating screw is fixedly connected to a limit piece fixedly connected to the mounting base, the outer wall of the reciprocating screw is threadedly connected to a horizontally arranged support plate, the support plate is slidably connected to the mounting base, and the top of the support plate is fixedly connected to a discharge pipe fixedly connected to the guide pipe.

[0015] Preferably, a sealing ring is fixedly connected to the top inner wall of the feeding tube, and a limiting ring is fixedly connected to the bottom inner wall of the feeding tube. A positioning ring slidably connected to the inner wall of the feeding tube is arranged below the limiting ring. A first elastic member is connected between the top of the positioning ring and the bottom of the limiting ring. A sealing member is provided inside the feeding tube, and the sealing member can seal the sealing ring and the limiting ring. An extrusion rod is fixedly connected to the bottom of the sealing member, and the first elastic member is sleeved on the outer wall of the extrusion rod.

[0016] Preferably, the temperature control mechanism includes a transfer bin fixed on the outer wall of the ventilation duct, the outer side of the transfer bin is fixedly connected to a water inlet pipe, a mounting groove is provided on the top of the mounting base, a water outlet pipe is fixedly connected to the inside of the mounting groove, one end of the water outlet pipe is connected to the transfer bin, the other end of the water outlet pipe is fixedly connected to a nozzle, and a one-way valve is provided between the water outlet pipe and the transfer bin.

[0017] Preferably, the water outlet pipe is fixedly connected to a boosting pipe near the outer wall of the guide pipe, a second piston member is slidably connected inside the boosting pipe, a movable rod is fixedly connected to the bottom of the second piston member and is sealingly and slidably connected to the guide pipe, the bottom end of the movable rod passes through the guide pipe, a second elastic member is connected between the bottom of the second piston member and the inner wall of the guide pipe, and a fixing member corresponding to the position of the movable rod is fixedly connected to the outer wall of the guide pipe.

[0018] Preferably, a controller is connected to the side of the mounting base close to the guide pipe, and a gas detection device is provided on the support plate, and the gas detection device can detect the gas concentration inside the mine tunnel. The gas detection device, the first fan, the second fan and the drive motor are all electrically connected to the controller, and the controller can control the working status of the first fan, the second fan and the drive motor.

[0019] A method for controlling gas concentration in a high-gas coal mine working face comprises the following steps:

[0020] S1. The gas detection device detects the gas concentration in the mine in real time and transmits the collected data to the controller;

[0021] S2. When the gas detection device detects that the gas concentration inside the mine reaches a threshold, the controller controls the first fan, the second fan and the drive motor to work;

[0022] S3. The driving motor drives the support plate to move back and forth, so that the guide pipe moves inside the ventilation pipe, and gas is extracted at different positions inside the mine tunnel to control the gas concentration inside the mine tunnel.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention is provided with a movable mechanism and a gas detection device. When the gas detection device detects that the gas concentration inside the mine tunnel reaches a threshold value, the controller controls the first fan, the second fan and the driving motor to work, so that the support plate drives the guide pipe to move inside the ventilation pipe, changes the position of extracting gas, and prevents the gas concentration in different areas inside the mine tunnel from being inconsistent. At the same time, the support plate moves together with the gas detection device, so that the gas detection device detects the gas concentration in different areas inside the mine tunnel, improves the accuracy of equipment detection, adjusts the speed of the driving motor in real time according to the gas concentration, and adjusts the frequency of gas discharge from the guide pipe and the cooling chamber to the outlet through the speed of the driving motor. When the gas concentration is high, the gas is quickly extracted to reduce the gas concentration. When the gas concentration is too low, the gas carried by the extraction equipment in the mine tunnel is reduced, thereby reducing the impact on the working environment in the mine tunnel.

[0025] 2. The present invention is provided with a temperature control mechanism, a ventilation pipe and a feeding pipe. During the movement of the support plate toward the direction close to the ventilation pipe, the air entering the ventilation pipe through the second fan will enter the interior of the air intake pipe, and will be discharged to the interior of the mine tunnel through the air intake pipe, thereby achieving ventilation and cooling, and ensuring a better working environment in the mine tunnel. At the same time, the cleaning ring moves from the top to the bottom of the guide pipe to clean the adsorbed matter on the inner wall of the guide pipe. When the support plate moves toward the direction away from the ventilation pipe, the gas inside the guide pipe will enter the interior of the cooling chamber through the air outlet. At this time, part of the gas inside the ventilation pipe will enter the interior of the discharge pipe. The air entering the discharge pipe will mix with the gas inside the discharge pipe to reduce the gas concentration inside the discharge pipe, thereby preventing the gas concentration inside the pipeline from increasing and causing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0027] In the attached picture:

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the flow guide tube of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the ventilation pipe of the present invention;

[0031] Figure 4 It is a schematic diagram of the internal structure of the flow guide tube of the present invention;

[0032] Figure 5 It is a schematic diagram of the internal structure of the ventilation pipe of the present invention;

[0033] Figure 6 It is a schematic diagram of the internal structure of the control mechanism of the present invention;

[0034] Figure 7 For the present invention Figure 6 Schematic diagram of the structure of part A in FIG.

[0035] Figure 8 For the present invention Figure 6 Schematic diagram of the structure of part B.

[0036] In the figure: 1. mounting base; 11. mounting slot; 12. controller; 13. gas detection device; 2. regulating mechanism; 21. ventilation pipe; 22. flow guide pipe; 23. discharge pipe; 24. first piston member; 25. gas outlet; 26. first filter plate; 27. first fan; 28. fixing ring; 29. ​​connecting rod; 210. cleaning ring; 211. second filter plate; 212. second fan; 213. cooling chamber; 214. air inlet pipe; 3. movable mechanism; 31. Driving motor; 32, reciprocating screw; 33, limiting member; 34, supporting plate; 35, feeding pipe; 36, blocking ring; 37, limiting ring; 38, positioning ring; 39, first elastic member; 310, blocking member; 311, extrusion rod; 4, temperature control mechanism; 41, transfer chamber; 42, water inlet pipe; 43, water outlet pipe; 44, nozzle; 45, one-way valve; 46, boosting pipe; 47, second piston member; 48, movable rod; 49, second elastic member; 410, fixing member. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] During the coal mining process, gas in the coal seam is released, causing gas to accumulate inside the mining work space. It is necessary to monitor the gas concentration inside the mine in real time and regulate the emission of gas inside the mine. However, when the existing equipment is controlling the gas concentration, the extraction position remains unchanged, resulting in a high gas concentration at the beginning of the extraction equipment when extracting gas inside the mine, making it difficult to quickly extract gas in a constant time to reduce the gas concentration. After the extraction equipment has been working for a certain period of time, the gas concentration in the area is too low, and the extraction equipment will bring out the gas in the mine, affecting the working environment in the mine, and causing inconsistent gas concentrations in different areas of the mine, causing the gas detection device to have inaccurate detection accuracy when detecting gas concentration, affecting the operation of the extraction equipment, and causing the gas concentration inside the mine to quickly reach the threshold after the equipment stops working, which is not convenient for actual use.

[0040] refer to Figure 1 - Figure 3 and Figure 6 , a gas concentration intelligent control device for a high-gas coal mine recovery working face, comprising a mounting base 1, characterized in that it also includes:

[0041] The regulating mechanism 2 is arranged on the top of the mounting base 1. The regulating mechanism 2 includes a ventilation pipe 21 and a guide pipe 22. The outer wall of the guide pipe 22 is fixedly connected with a plurality of discharge pipes 23. The ventilation pipe 21 is fixedly connected to the top of the mounting base 1 and is used to connect to the outside to ventilate the inside of the mine tunnel. The guide pipe 22 is slidably connected to the inside of the ventilation pipe 21 and is used to guide the gas inside the mine tunnel into the inside of the discharge pipe 23.

[0042] The movable mechanism 3 is arranged on one side of the mounting base 1. The guide tube 22 is slidably connected to the mounting base 1 through the movable mechanism 3. The movable mechanism 3 is used to control the movement of the guide tube 22 inside the ventilation tube 21:

[0043] and a temperature control mechanism 4, which is arranged on the outer wall of the ventilation pipe 21 and is used to cooperate with the movable mechanism 3 to control the moving guide pipe 22 to cool the mine tunnel;

[0044] The regulating mechanism 2 also includes an air inlet pipe 214 fixedly connected to the outer wall of the ventilation pipe 21, one end of the guide pipe 22 located inside the ventilation pipe 21 is fixedly connected to a first piston member 24, and the first piston member 24 is slidably connected to the inner wall of the ventilation pipe 21. A plurality of air outlets 25 are provided on the outer wall of one end of the guide pipe 22 close to the first piston member 24, and the other end of the guide pipe 22 is fixedly connected to a first filter plate 26, and one side of the first filter plate 26 located inside the guide pipe 22 is connected to a first fan 27, and the first fan 27 can draw the gas in the mine tunnel into the inside of the guide pipe 22, and the first filter plate 26 is used to filter the gas entering the inside of the guide pipe 22 to prevent the gas from carrying larger impurities into the inside of the guide pipe 22;

[0045] The top of the ventilation pipe 21 is connected to the outside, that is, the space on the ground. A second filter plate 211 is fixedly connected to the top of the ventilation pipe 21. A second fan 212 is connected to one side of the second filter plate 211 located inside the ventilation pipe 21. The second fan 212 can draw external gas into the ventilation pipe 21. The second filter plate 211 is used to filter the gas entering the ventilation pipe 21 to prevent the gas from carrying more impurities into the ventilation pipe 21.

[0046] A cooling chamber 213 is provided between the outer wall of the flow guide pipe 22 and the inner wall of the ventilation pipe 21. The number of the air outlets 25 is consistent with the number of the discharge pipes 23. The positions of the air outlets 25 correspond to the positions of the discharge pipes 23. The discharge pipes 23 can be connected to a gas collection device to collect the discharged gas and realize the utilization of the gas. The gas collection device is a prior art and will not be described in detail here.

[0047] The movable mechanism 3 includes a driving motor 31, which is fixedly connected to a side of the mounting base 1 close to the ventilation pipe 21, and the output end of the driving motor 31 is fixedly connected to a vertically arranged reciprocating screw 32, and the other end of the reciprocating screw 32 is fixedly connected to a limiter 33 fixedly connected to the mounting base 1, and the outer wall of the reciprocating screw 32 is threadedly connected to a horizontally arranged support plate 34, and the support plate 34 is slidably connected to the mounting base 1, and the top of the support plate 34 is fixedly connected to a feed pipe 35 fixedly connected to the guide pipe 22;

[0048] A controller 12 is connected to one side of the mounting base 1 close to the guide pipe 22, and a gas detection device 13 is provided on the support plate 34. The gas detection device 13 can detect the gas concentration inside the mine tunnel. The gas detection device 13 can be a contact combustion type gas sensor. The prior art will not be repeated here. The gas detection device 13, the first fan 27, the second fan 212 and the drive motor 31 are all electrically connected to the controller 12. The controller 12 can control the working states of the first fan 27, the second fan 212 and the drive motor 31. When the controller 12 receives different gas concentration signals from the gas detection device 13, the controller 12 will adjust the rotation speed of the drive motor 31, that is, when the gas concentration is higher, the rotation speed of the drive motor 31 is faster, and vice versa, when the gas concentration is lower, the rotation speed of the drive motor 31 is slower. The rotation speed of the drive motor 31 is adjusted in real time according to the gas concentration to save energy.

[0049] In the initial state, the guide tube 22 can be close to the bottom of the mounting base 1, the support plate 34 is at the lower limit position of the reciprocating screw rod 32, and the gas concentration threshold of the gas detection device 13 is set according to actual conditions.

[0050] In actual use, when the gas detection device 13 detects that the gas concentration inside the mine tunnel reaches a threshold value, the controller 12 receives a detection signal from the gas detection device 13, and the controller 12 controls the first fan 27, the second fan 212 and the drive motor 31 to work. The drive motor 31 drives the reciprocating screw 32 to rotate, so that the support plate 34 reciprocates on the reciprocating screw 32, and the support plate 34 moves toward the direction close to the ventilation pipe 21. When the support plate 34 moves toward the direction close to the ventilation pipe 21, the first piston member 24 will contact with the fixing ring 28. At this time, the gas inside the guide pipe 22 and the cooling chamber 213 will enter the exhaust pipe 23 through the air outlet 25, and the gas will be discharged through the exhaust pipe 23. When the support plate 34 moves in the direction away from the ventilation pipe 21, the gas inside the guide pipe 22 will enter the cooling chamber 213 through the air outlet 25 for cooling. At this time, part of the gas inside the ventilation pipe 21 will enter the exhaust pipe 23, and part of the gas will enter the mine tunnel through the air inlet pipe 214.

[0051] During this process, when the gas concentration increases, the controller 12 will control the speed of the drive motor 31 to increase, and vice versa, when the gas concentration decreases, the controller 12 will control the speed of the drive motor 31 to decrease. The speed of the drive motor 31 is adjusted in real time according to the gas concentration. The faster the speed, the faster the reciprocation of the support plate 34. The frequency of gas discharge from the guide tube 22 and the cooling chamber 213 to the outlet 25 is then adjusted by the speed of the drive motor 31. Since the gas detection device 13 is set on the support plate 34, the gas detection device 13 will move together with the support plate 34, thereby detecting the gas concentration in different areas inside the mine tunnel and improving the accuracy of the detection.

[0052] The present invention is provided with a movable mechanism 3 and a gas detection device 13. When the gas detection device 13 detects that the gas concentration inside the mine tunnel reaches a threshold value, the controller 12 controls the first fan 27, the second fan 212 and the drive motor 31 to work, so that the support plate 34 drives the guide pipe 22 to move inside the ventilation pipe 21, changes the position of extracting gas, and prevents the gas concentration in different areas inside the mine tunnel from being inconsistent. At the same time, the support plate 34 moves together with the gas detection device 13, so that the gas detection device 13 detects the gas concentration in different areas inside the mine tunnel, improves the accuracy of equipment detection, and adjusts the speed of the drive motor 31 in real time according to the gas concentration. The frequency of gas discharge from the guide pipe 22 and the cooling chamber 213 to the gas outlet 25 is adjusted by the speed of the drive motor 31. When the gas concentration is high, the gas is quickly extracted to reduce the gas concentration. When the gas concentration is too low, the gas carried by the extraction equipment in the mine tunnel is reduced, thereby reducing the impact on the working environment in the mine tunnel.

[0053] Example 2

[0054] On the basis of the above-mentioned embodiment, when gas is extracted, coal powder will be carried into the interior of the pipeline. On the one hand, impurities such as coal powder will be accumulated inside the pipeline, resulting in a smaller inner diameter of the pipeline, affecting emissions. On the other hand, since the mining face is located underground, the long-term operation of the mining equipment will cause the internal temperature to rise. When gas is extracted, heat flow will be carried into the pipeline, causing the organic matter in the coal powder adsorbed inside the pipeline to undergo thermal cracking inside the pipeline, producing methane, which will increase the gas concentration inside the pipeline and create a safety hazard.

[0055] refer to Figure 4 - Figure 8 The inner wall of the ventilation pipe 21 is fixedly connected with a fixing ring 28, and the bottom of the fixing ring 28 is fixedly connected with a connecting rod 29. One end of the connecting rod 29 that passes through the first piston member 24 is fixedly connected with a cleaning ring 210. The connecting rod 29 is sealingly and slidably connected with the first piston member 24. The cleaning ring 210 is located inside the guide pipe 22. The cleaning ring 210 can contact the inner wall of the guide pipe 22 and can clean the adsorbed matter on the inner wall of the guide pipe 22. In the initial position, the guide pipe 22 can be close to the bottom of the mounting base 1. The support plate 34 is at the lower limit position of the reciprocating screw rod 32, and the cleaning ring 210 is located at the inner top limit position of the guide pipe 22.

[0056] A blocking ring 36 is fixedly connected to the inner wall of the top of the feeding tube 35, and a limiting ring 37 is fixedly connected to the inner wall of the bottom of the feeding tube 35. A positioning ring 38 slidably connected to the inner wall of the feeding tube 35 is arranged below the limiting ring 37. A first elastic member 39 is connected between the top of the positioning ring 38 and the bottom of the limiting ring 37. A blocking member 310 is arranged inside the feeding tube 35. The blocking member 310 can block the blocking ring 36 and the limiting ring 37. An extrusion rod 311 is fixedly connected to the bottom of the blocking member 310. The first elastic member 39 is sleeved on the outer wall of the extrusion rod 311. In the initial state, the blocking member 310 blocks the limiting ring 37. The top of the blocking member 310 is conical, which is convenient for coal powder to fall from the blocking member 310. The inner side of the blocking ring 36 can be inclined, which is convenient for coal powder to fall from the blocking ring 36.

[0057] The temperature control mechanism 4 includes a transfer chamber 41 fixed on the outer wall of the ventilation pipe 21, and the outer side of the transfer chamber 41 is fixedly connected with a water inlet pipe 42. A mounting groove 11 is provided on the top of the mounting base 1, and a water outlet pipe 43 is fixedly connected inside the mounting groove 11. One end of the water outlet pipe 43 is connected to the transfer chamber 41, and the other end of the water outlet pipe 43 is fixedly connected to a nozzle 44. The outlet on the nozzle 44 is small, so that the sprayed water becomes water mist. A one-way valve 45 is provided between the water outlet pipe 43 and the transfer chamber 41. The water inlet pipe 42 is connected with a water supply device for supplying water to the water inlet pipe 42. The water supply device can be a water tank or a water tower. The prior art will not be repeated here.

[0058] The water outlet pipe 43 is fixedly connected to a boosting pipe 46 near the outer wall of the guide pipe 22, and a second piston member 47 is slidably connected inside the boosting pipe 46. The bottom of the second piston member 47 is fixedly connected to a movable rod 48 that is sealingly and slidably connected to the guide pipe 22. The bottom end of the movable rod 48 passes through the guide pipe 22. A second elastic member 49 is connected between the bottom of the second piston member 47 and the inner wall of the guide pipe 22. The outer wall of the guide pipe 22 is fixedly connected to a fixing member 410 corresponding to the position of the movable rod 48. In the initial state, the second piston member 47 is located at the bottom of the boosting pipe 46.

[0059] In actual use, when the gas detection device 13 detects that the gas concentration inside the mine tunnel reaches a threshold value, the controller 12 receives a detection signal from the gas detection device 13, and the controller 12 controls the first fan 27, the second fan 212 and the drive motor 31 to work. The drive motor 31 drives the reciprocating screw 32 to rotate, so that the support plate 34 reciprocates on the reciprocating screw 32. During the movement of the support plate 34 toward the ventilation pipe 21, the air entering the ventilation pipe 21 through the second fan 212 will enter the interior of the intake pipe 214, and be discharged into the mine tunnel through the intake pipe 214. Ventilation and cooling are achieved to ensure a better working environment in the mine tunnel. At the same time, the cleaning ring 210 moves from the top to the bottom of the guide pipe 22 to clean the adsorbent on the inner wall of the guide pipe 22, so that the adsorbent gathers at the bottom of the cleaning ring 210 and enters the lower feed pipe 35. When the support plate 34 moves in a direction away from the ventilation pipe 21, the gas inside the guide pipe 22 will enter the cooling chamber 213 through the air outlet 25. At this time, part of the gas inside the ventilation pipe 21 will enter the exhaust pipe 23. The air entering the exhaust pipe 23 is mixed with the gas inside the exhaust pipe 23. It is used to reduce the concentration of gas inside the discharge pipe 23 to prevent the gas concentration inside the pipe from increasing and causing safety hazards. Part of the gas inside the discharge pipe 23 enters the mine tunnel through the air inlet pipe 214 for ventilation, ensuring a better working environment in the mine tunnel in real time, accelerating the circulation of gas inside the mine tunnel, and facilitating the discharge of gas inside the mine tunnel. At the same time, when the support plate 34 moves away from the ventilation pipe 21, the extrusion rod 311 will first contact and squeeze the bottom of the mounting base 1, so that the positioning ring 38 moves toward the direction close to the limit ring 37, the first elastic member 39 is compressed, and the blocking member 310 moves away. The blocking member 310 moves in the direction away from the limiting ring 37, so that the blocking member 310 blocks the blocking ring 36. In the process of the blocking member 310 moving in the direction away from the limiting ring 37, the airflow inside the discharge pipe 35 will blow on the top of the blocking member 310, so that the adsorbed material on the top of the blocking member 310 is discharged from the gap between the extrusion rod 311 and the limiting ring 37 through the airflow. In the process of the support plate 34 moving in the direction close to the ventilation pipe 21, the first elastic member 39 is reset, and the blocking member 310 collides with the limiting ring 37 to generate vibration, so that the adsorbed material inside the pipeline falls off and falls onto the blocking member 310 through the vibration.

[0060] Furthermore, since air will enter the mine tunnel through the air inlet pipe 214, the circulation of gas inside the mine tunnel will be accelerated. Affected by the mine tunnel environment, the coal powder inside the mine tunnel will be stirred and floated, affecting the work of the workers. In the process of the support plate 34 moving toward the direction close to the ventilation pipe 21, the fixing member 410 on the outer wall of the guide pipe 22 will preferentially contact and squeeze with the movable rod 48, so that the second piston member 47 moves toward the direction close to the water outlet pipe 43, and the second elastic member 49 is compressed. The second piston member 47 squeezes the water inside the water outlet pipe 43, so that the water enters the inside of the nozzle 44 under the action of pressure and is discharged in the form of water mist. The coal powder inside the mine tunnel is adsorbed by the water mist, and the degree of floating of the coal powder inside the mine tunnel is reduced. At the same time, since the pressure changes from high to low in the process of water turning into water mist, it leads to The temperature of the water mist is relatively low, which can cool down the inside of the mine tunnel, reduce the working environment temperature, and improve the comfort level. During the movement of the support plate 34 in the direction away from the ventilation pipe 21, the second elastic member 49 is reset, and the second piston member 47 moves in the direction away from the water outlet pipe 43, so that the water inside the transfer bin 41 enters the water outlet pipe 43 through the one-way valve 45, circulates and replaces the water inside the transfer bin 41, and cools down the outer wall of the replaced water ventilation pipe 21, so that the gas inside the cooling chamber 213 is cooled to avoid gas extraction. The equipment carries heat flow into the pipeline, so that the organic matter in the coal powder adsorbed inside the pipeline undergoes thermal cracking inside the pipeline to produce methane, which increases the gas concentration inside the pipeline, causing safety hazards. The adsorbed matter includes impurities such as coal powder.

[0061] The present invention is provided with a temperature control mechanism 4, a ventilation pipe 21 and a feed pipe 35. When the gas detection device 13 detects that the gas concentration inside the mine tunnel reaches a threshold value, the support plate 34 moves toward the direction close to the ventilation pipe 21, and the air entering the ventilation pipe 21 through the second fan 212 will enter the interior of the air intake pipe 214, and be discharged to the interior of the mine tunnel through the air intake pipe 214, so as to realize ventilation and cooling, and ensure a better working environment in the mine tunnel. At the same time, the cleaning ring 210 moves from the top to the bottom of the guide pipe 22 to clean the adsorbed material on the inner wall of the guide pipe 22. When the support plate 34 moves in a direction away from the ventilation pipe 21, the gas inside the guide pipe 22 will enter the interior of the cooling chamber 213 through the air outlet 25. At this time, part of the gas inside the ventilation pipe 21 will enter the interior of the discharge pipe 23. The air entering the discharge pipe 23 is mixed with the gas inside the discharge pipe 23, so as to reduce the gas concentration inside the discharge pipe 23 and prevent the gas concentration inside the pipeline from increasing and causing safety hazards.

[0062] Example 3

[0063] On the basis of the above embodiment, this embodiment further provides a method for controlling gas concentration in a high-gas coal mine working face, comprising the following steps:

[0064] S1. The gas detection device 13 detects the gas concentration in the mine in real time and transmits the collected data to the controller;

[0065] S2. When the gas detection device 13 detects that the gas concentration inside the mine reaches the threshold, the controller 12 controls the first fan 27, the second fan 212 and the drive motor 31 to work;

[0066] S3. The driving motor 31 drives the support plate 34 to move back and forth, so that the guide pipe 22 moves inside the ventilation pipe 21, and gas is extracted at different positions inside the mine tunnel to achieve control of the gas concentration inside the mine tunnel.

[0067] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent gas concentration control device for a high-gas coal mine recovery working face, comprising a mounting base (1), characterized in that: Also includes: A regulating mechanism (2), the regulating mechanism (2) being arranged on the top of the mounting base (1), the regulating mechanism (2) comprising a ventilation pipe (21) and a guide pipe (22), the outer wall of the guide pipe (22) being fixedly connected to a plurality of discharge pipes (23), the ventilation pipe (21) being fixedly connected to the top of the mounting base (1) and being used to communicate with the outside world to ventilate the interior of the mine tunnel, the guide pipe (22) being slidably connected to the interior of the ventilation pipe (21) and being used to guide the gas inside the mine tunnel into the interior of the discharge pipe (23); A movable mechanism (3), the movable mechanism (3) being arranged on one side of the mounting base (1), the guide tube (22) being slidably connected to the mounting base (1) via the movable mechanism (3), and the movable mechanism (3) being used to control the movement of the guide tube (22) inside the ventilation tube (21); and a temperature control mechanism (4), wherein the temperature control mechanism (4) is arranged on the outer wall of the ventilation pipe (21) and is used to cooperate with the movable mechanism (3) to control the movement of the guide pipe (22) to cool the mine tunnel.

2. The intelligent gas concentration control device for a high-gas coal mine recovery working face according to claim 1 is characterized in that: The control mechanism (2) further comprises an air inlet pipe (214) fixedly connected to the outer wall of the ventilation pipe (21); one end of the air guide pipe (22) located inside the ventilation pipe (21) is fixedly connected to a first piston member (24); the first piston member (24) is slidably connected to the inner wall of the ventilation pipe (21); a plurality of air outlets (25) are provided on the outer wall of one end of the air guide pipe (22) close to the first piston member (24); the other end of the air guide pipe (22) is fixedly connected to a first filter plate (26); and one side of the first filter plate (26) located inside the air guide pipe (22) is connected to a first fan (27).

3. The intelligent gas concentration control device for a high-gas coal mine recovery working face according to claim 2 is characterized in that: The inner wall of the ventilation pipe (21) is fixedly connected with a fixing ring (28), the bottom of the fixing ring (28) is fixedly connected with a connecting rod (29), one end of the connecting rod (29) passing through the first piston member (24) is fixedly connected with a cleaning ring (210), the connecting rod (29) is sealingly and slidably connected with the first piston member (24), the cleaning ring (210) is located inside the guide pipe (22), the cleaning ring (210) can contact with the inner wall of the guide pipe (22), and can clean the adsorbed matter on the inner wall of the guide pipe (22), the top of the ventilation pipe (21) is connected with the outside, the top of the ventilation pipe (21) is fixedly connected with a second filter plate (211), and the second filter plate (211) is located inside the ventilation pipe (21) and is connected to a second fan (212) on one side thereof.

4. The intelligent gas concentration control device for high-gas coal mine recovery working face according to claim 3 is characterized in that: A cooling cavity (213) is provided between the outer wall of the guide pipe (22) and the inner wall of the ventilation pipe (21); the number of the air outlets (25) is consistent with the number of the discharge pipes (23); and the positions of the air outlets (25) correspond one-to-one to the positions of the discharge pipes (23).

5. The intelligent gas concentration control device for high-gas coal mine recovery working face according to claim 4 is characterized in that: The movable mechanism (3) comprises a driving motor (31), the driving motor (31) being fixedly connected to a side of the mounting base (1) close to the ventilation pipe (21), the output end of the driving motor (31) being fixedly connected to a vertically arranged reciprocating screw (32), the other end of the reciprocating screw (32) being fixedly connected to a limiter (33) fixedly connected to the mounting base (1), the outer wall of the reciprocating screw (32) being threadedly connected to a horizontally arranged support plate (34), the support plate (34) being slidably connected to the mounting base (1), and the top of the support plate (34) being fixedly connected to a feed pipe (35) fixedly connected to the guide pipe (22).

6. The intelligent gas concentration control device for high-gas coal mine recovery working face according to claim 5 is characterized in that: A sealing ring (36) is fixedly connected to the inner wall of the top of the feeding tube (35), and a limiting ring (37) is fixedly connected to the inner wall of the bottom of the feeding tube (35). A positioning ring (38) slidably connected to the inner wall of the feeding tube (35) is arranged below the limiting ring (37). A first elastic member (39) is connected between the top of the positioning ring (38) and the bottom of the limiting ring (37). A sealing member (310) is arranged inside the feeding tube (35), and the sealing member (310) can seal the sealing ring (36) and the limiting ring (37). An extrusion rod (311) is fixedly connected to the bottom of the sealing member (310), and the first elastic member (39) is sleeved on the outer wall of the extrusion rod (311).

7. The intelligent gas concentration control device for high-gas coal mine recovery working face according to claim 6 is characterized in that: The temperature control mechanism (4) comprises a transfer chamber (41) fixed on the outer wall of the ventilation pipe (21), the outer side of the transfer chamber (41) is fixedly connected to a water inlet pipe (42), the top of the mounting base (1) is provided with a mounting groove (11), the interior of the mounting groove (11) is fixedly connected to a water outlet pipe (43), one end of the water outlet pipe (43) is connected to the transfer chamber (41), the other end of the water outlet pipe (43) is fixedly connected to a nozzle (44), and a one-way valve (45) is provided between the water outlet pipe (43) and the transfer chamber (41).

8. The intelligent gas concentration control device for high-gas coal mine recovery working face according to claim 7 is characterized in that: The water outlet pipe (43) is fixedly connected to a boosting pipe (46) near the outer wall of the guide pipe (22); a second piston member (47) is slidably connected inside the boosting pipe (46); the bottom of the second piston member (47) is fixedly connected to a movable rod (48) that is sealingly and slidably connected to the guide pipe (22); the bottom end of the movable rod (48) passes through the guide pipe (22); a second elastic member (49) is connected between the bottom of the second piston member (47) and the inner wall of the guide pipe (22); and the outer wall of the guide pipe (22) is fixedly connected to a fixing member (410) corresponding to the position of the movable rod (48).

9. The intelligent gas concentration control device for high-gas coal mine recovery working face according to claim 8 is characterized in that: A controller (12) is connected to one side of the mounting base (1) close to the guide pipe (22); a gas detection device (13) is provided on the support plate (34); the gas detection device (13) is capable of detecting the gas concentration inside the mine tunnel; the gas detection device (13), the first fan (27), the second fan (212) and the drive motor (31) are all electrically connected to the controller (12); and the controller (12) is capable of controlling the working states of the first fan (27), the second fan (212) and the drive motor (31).

10. A method for controlling gas concentration in a high-gas coal mine recovery working face, using a gas concentration intelligent control device for a high-gas coal mine recovery working face according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The gas detection device (13) detects the gas concentration in the mine in real time and transmits the collected data to the controller; S2. When the gas detection device (13) detects that the gas concentration inside the mine tunnel reaches a threshold value, the controller (12) controls the first fan (27), the second fan (212) and the drive motor (31) to work; S3. The driving motor (31) drives the support plate (34) to move back and forth, so that the guide pipe (22) moves inside the ventilation pipe (21), and gas is extracted at different positions inside the mine tunnel, thereby achieving control of the gas concentration inside the mine tunnel.

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