Gas detection system and method for coal mine

Abstract

The invention relates to the technical field of coal mine tunnel gas detection, in particular to a gas detection system and method for a coal mine, and the detection system comprises a strip-shaped mounting seat, a liftable supporting column, a track walking wheel structure, a gas detector, an extraction pipeline gas detection structure and a coal mine tunnel gas detection structure, the gas detector is mounted below the mounting base, a first sampling inspection opening and a second sampling inspection opening are formed in the front end and the rear end of the gas detector respectively, and the first sampling inspection opening of the gas detector is connected with a coal mine tunnel gas detection structure arranged above the mounting base; and a second sampling port of the gas detector is respectively connected with the two extraction pipeline gas detection structures through a three-way control valve. By means of the design, gas detection in a coal mine tunnel can be automatically completed instead of an inspector, gas detection in a gas suction pipeline system can be completed, the working intensity is greatly reduced, and gas detection is accurate and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine gas detection, and in particular to a gas detection system and method for coal mines. Background Art

[0002] In order to ensure safety, coal mine operations often arrange gas pipeline suction systems in coal mine tunnels, through which gas is pumped to designated locations for storage and treatment. However, in order to prevent leakage, the gas content in the pipeline needs to be tested frequently, and for safe operations, gas detection in coal mine tunnels also needs to be performed frequently. Existing detection methods often involve manual sampling in coal mine tunnels with sampling detectors, but there is currently no mature detection device that can complete gas detection in pipelines and in coal mine tunnels. Therefore, the inspectors either conduct detection in pipelines or in coal mine tunnels, which has great limitations. This method will also greatly increase the workload of inspectors, which is very inconvenient. In addition, the detection accuracy is often linked to the inspectors' experience, and the results of different detection heights and positions are often different. The detection results of different personnel will also be inconsistent. Therefore, in order to solve the above problems, it is particularly important to design a gas detection system and method for coal mines. Summary of the invention

[0003] In order to solve the above-mentioned problem, the present invention designs a gas detection system and method for coal mines. Through this design, not only can the inspectors be replaced to automatically complete the gas detection inside the coal mine tunnels, but also the gas detection in the gas suction pipeline system can be completed, which greatly reduces the workload. In addition, the gas detection is accurate and convenient, which plays a role in increasing practical performance.

[0004] In order to solve the above-mentioned technical problems, the present invention provides a gas detection system for coal mines, which includes a long strip-shaped mounting seat, a liftable support column, a track walking wheel structure, a gas detector, an extraction pipeline gas detection structure and a coal mine tunnel gas detection structure. The mounting seat is horizontally placed and a liftable support column is vertically arranged at the bottom of each left and right end. The lower end of the liftable support column is connected to the track walking wheel structure and is connected to the I-shaped track at the bottom of the coal mine tunnel through the track walking wheel structure. A tilting mechanism is arranged between the lower end of the liftable support column and the track walking wheel structure. The gas detector is installed below the mounting seat. A first sampling port and a second sampling port are respectively arranged at the front and rear ends of the gas detector. The first sampling port of the gas detector is connected to the coal mine tunnel gas detection structure arranged above the mounting seat, and the second sampling port of the gas detector is connected to two extraction pipeline gas detection structures through three-way control valves. The two extraction pipeline gas detection structures are respectively installed on two liftable support columns.

[0005] Further: the gas detector is detachably connected to the bottom of the U-shaped sliding seat through the lower mounting plate, the U-shaped sliding seat is slidably connected to the outside of the mounting seat, the vertical cross-section of the mounting seat is also U-shaped, and a left and right adjustment servo motor is installed on the back of the U-shaped sliding seat. The output shaft of the left and right adjustment servo motor extends into the mounting seat and is connected to the rotating gear. The back of the mounting seat is provided with a through groove for the output shaft of the left and right adjustment servo motor to pass through. The mounting seats on the upper and lower sides of the rotating gear are provided with matching tooth structures, and the rotating gear is respectively meshed with the tooth structures on the upper and lower sides, and the left and right ends of the mounting seat can also be detachably installed with limit baffles.

[0006] Furthermore: the coal mine gas detection structure includes a guide support frame, a guide outer cylinder and a telescopic detection tube. The guide support frame is fixed to the top of the U-shaped sliding seat through an upper mounting plate. The guide outer cylinder is vertically fixed between the upper end of the guide support frame and the upper mounting plate. The lower end of the telescopic detection tube passes through the guide support frame and extends into the guide outer cylinder and is connected to the rubber outer ring body. The rubber outer ring body is fixed on the outside of the lower end of the telescopic detection tube and is piston-connected in the guide outer cylinder up and down. The lower end of the telescopic detection tube extended into the guide outer cylinder is open. The rubber outer ring body is connected to the upper mounting plate through a first spring arranged in the guide outer cylinder. An air guide hole is opened on the side wall of the lower end of the guide outer cylinder, and the air guide hole is connected to the first sampling port through a first hose.

[0007] Furthermore: a connecting seat is fixed on the outer wall of the upper end of the telescopic detection tube, and a contact wheel is installed on each of the left and right sides of the connecting seat. The telescopic detection tube contacts the top wall in the coal mine tunnel through the contact wheel and there is a gap between its upper end and the top wall in the coal mine tunnel.

[0008] Furthermore: the liftable support column includes an upper column body, a lower rod body and a lift-adjustable electric cylinder, the upper end of the upper column body is fixed to the bottom of the mounting seat, the bottom of the upper column body is provided with a guide hole matching the lower rod body, the upper end of the lower rod body extends into the guide hole, the lift-adjustable electric cylinder is installed on the outer wall of the lower end of the upper column body and its shaft end is connected to the transmission member, the side wall of the upper column body is also provided with a guide notch for the transmission member to extend into, the transmission member extends into the upper column body along the guide notch and is connected to the upper end of the lower rod body, and the transmission member can slide up and down along the guide notch.

[0009] Furthermore: the lower end of the lower rod body is connected to the support block as a whole, and the track walking wheel structure includes a support frame, a connecting frame arranged above the support frame and connected to the support frame as a whole, a walking wheel bracket arranged below the support frame and connected to the support frame as a whole, and a track walking wheel installed on the walking wheel bracket. Two connecting frames are arranged above the support frame, and the two connecting frames are connected to the tilting mechanism arranged in the support block. A walking wheel bracket is respectively arranged at the bottom of the left and right ends of the support frame, and the two walking wheel brackets are arranged opposite to each other and have reinforcing ribs between the support frame. The two walking wheel brackets are connected to the I-shaped track through the track walking wheel, and one of the walking wheel brackets is also equipped with a walking wheel driving motor for driving the track walking wheel to rotate.

[0010] Furthermore: the tilting mechanism includes a support shaft and an adjustable telescopic electric cylinder horizontally installed in the lower end of the support block, the bottom of the support block is provided with a notch relative to the position of the two connecting frames, the two connecting frames extend into the support block from the notch and are connected to the support shaft, and an adjustable telescopic electric cylinder is installed on each of the support frames on the front and rear sides of the support block, the adjustable telescopic electric cylinder is movably installed on the support frame and its shaft end is movably connected to the support block.

[0011] Furthermore: the extraction pipeline gas detection structure includes a pipe reel, a delivery hose, a suction hose and a suction detection head. A placement tube for placing the suction detection head is provided on the outer wall of the upper column. The suction detection head is composed of a conducting end, a threaded section and a fixed end connected in sequence. The conducting end is fixedly connected to the threaded section. An external thread is provided on the outer wall of the threaded section and is rotatably connected to the fixed end. A placement hole matching the fixed end is provided at one end of the placement tube. A limited transmission plate is fixed on the outer wall of the threaded section. The pipe reel is hollow and its The horizontal rotation is connected between the two mounting plates, the two mounting plates are connected as a whole with the mounting frame and are fixed to the outer wall of the upper column through the mounting frame, one end of the suction hose extends into the placement tube and is connected to the fixed end, the other end of the suction hose is wound around the reel and is connected to the internal space of the reel, a mechanical sealing joint connected to the reel is provided on the outer wall of one mounting plate, one end of the delivery hose is connected to the three-way control valve, the other end of the delivery hose is connected to the mechanical sealing joint and is connected to the suction hose through the reel, and a crank handle that rotates the reel is provided on the other mounting plate.

[0012] Furthermore: a tank to be inspected that matches the gas detection structure of the extraction pipeline is fixed on the inner wall of the coal mine tunnel, the tank to be inspected is connected to the gas suction pipeline system arranged in the coal mine tunnel, and a switch valve is arranged between the tank to be inspected and the gas suction pipeline system. The tank to be inspected specifically consists of a tank body, an upper cover body, a sampling port arranged on the side wall of the tank body, an exhaust pipe, a valve core and a second spring, the lower end of the tank body is connected to the gas suction pipeline system, and the upper end of the tank body is sealed by the upper cover body, the sampling port is outwardly convex, and its inner wall is composed of an internal threaded section and a piston-type sealing section, the internal threaded section of the sampling port matches the threaded section of the suction detection head, and the exhaust pipe is one-way sealed The air suction pipe is shaped and arranged horizontally, with one sealed end located in the sampling inspection port and the open end extending into the tank body. The inner diameter of the conducting end of the suction detection head is larger than the outer diameter of the air suction pipe. The valve core is ring-shaped and piston-connected between the piston sealing section of the sampling inspection port and the air suction pipe. The valve core is also connected to the tank body through a second spring. An air suction hole is provided on the outer wall of the air suction pipe in the sampling inspection port, and the air suction hole is sealed by the valve core. An external thread is provided on the outer wall of the open end of the air suction pipe, which extends into the tank body and is connected to the nut structure through the external thread. The outer wall of the air suction pipe is also provided with an annular protrusion connected thereto, and the air suction pipe is horizontally fixed to the side wall of the tank body through the cooperation of the annular protrusion and the nut structure.

[0013] The present invention also provides a gas detection method for coal mines, which is specifically divided into a pipeline gas detection method and a coal mine tunnel gas detection method, wherein the pipeline gas detection method specifically refers to first driving the track walking wheel with the walking wheel driving motor to move it to the pipeline gas detection point with the detection system, pulling the suction detection head and connecting the threaded section into the sampling inspection port by rotating the limit transmission plate, using the conducting end to squeeze the valve core to open the suction hole, and then opening the switch valve between the tank to be sampled and the gas suction pipeline system, and then using the gas detector to perform gas detection, and the detection result is recorded and uploaded. After the detection is completed, the switch valve is first closed, and then Continue to use the gas detector to suck for 3-5s, then reversely rotate the limit transmission plate to separate the suction detection head from the sampling port, and turn the handle to put the suction detection head back into the placement tube for storage; the method for gas detection in the coal mine tunnel specifically refers to first making the contact wheel contact with the top of the coal mine tunnel through a liftable support column, so that the telescopic detection tube extends to the top of the coal mine tunnel, and then starting the walking wheel drive motor, using it to drive the track walking wheel to move along the I-shaped track, and avoiding by translation and tilting during the movement. The gas detector is sampled 3 times every 20-30m, and the maximum value is recorded and uploaded

[0014] After adopting the above structure, the present invention has the following beneficial effects:

[0015] 1. The present invention can not only replace the inspectors to automatically complete the gas detection inside the coal mine tunnel, but also complete the gas detection in the gas suction pipeline system, which greatly reduces the work intensity, and the gas detection is accurate and convenient.

[0016] 2. The present invention can avoid obstacles not only by tilting, but also by translating. By utilizing this design, gas detection can still be completed during the avoidance process, thereby increasing practical performance.

[0017] 3. The present invention provides a contact wheel at the upper end of the telescopic detection tube. This design can effectively prevent the telescopic detection tube from colliding with the top wall of the coal mine tunnel, and the distance between the upper end and the top wall of the coal mine tunnel can be kept consistent, thereby ensuring the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a usage state diagram of the present invention.

[0020] Figure 2 This is a partial structural diagram of the coal mine gas detection structure.

[0021] Figure 3 This is the structural diagram of the gas detection structure for extraction pipelines.

[0022] Figure 4 This is the connection structure diagram of the hose reel.

[0023] Figure 5 This is a structural diagram of the tilting mechanism.

[0024] Figure 6 This is the internal structure diagram of the tank to be inspected.

[0025] In the figure: 1 is a mounting seat, 2 is a gas detector, 3 is an I-shaped track, 4 is a coal mine tunnel, 5 is a lower mounting plate, 6 is a U-shaped sliding seat, 7 is a rotating gear, 8 is a tooth structure, 9 is a limit baffle, 10 is a guide support frame, 11 is a guide outer cylinder, 12 is a telescopic detection tube, 13 is an upper mounting plate, 14 is a connecting seat, 15 is a contact wheel, 16 is a through groove, 17 is an upper column, 18 is a lower rod body, 19 is a lifting and adjusting electric cylinder, 20 is a support block, 21 is a support frame, 22 is a connecting frame, 23 is a walking wheel bracket, 24 is a reinforcing rib, 25 2 is the track walking wheel, 26 is the walking wheel driving motor, 27 is the adjusting telescopic electric cylinder, 28 is the supporting shaft, 29 is the hose reel, 30 is the conveying hose, 31 is the suction hose, 32 is the suction detection head, 33 is the placement tube, 34 is the limit transmission plate, 35 is the crank handle, 36 is the mounting plate, 37 is the mounting frame, 38 is the mechanical sealing joint, 39 is the gas suction pipeline system, 40 is the tank to be inspected, 40-1 is the tank body, 40-2 is the upper cover body, 40-3 is the inspection port, 41 is the valve core, 42 is the exhaust pipe, 43 is the second spring, and 44 is the nut structure. DETAILED DESCRIPTION

[0026] like Figure 1 A gas detection system for a coal mine shown in the figure comprises a long strip-shaped mounting seat 1, a liftable support column, a track walking wheel structure, a gas detector 2, an extraction pipeline gas detection structure and a coal mine tunnel gas detection structure. The mounting seat is horizontally placed and a liftable support column is vertically arranged at the bottom of each of the left and right ends. The lower end of the liftable support column is connected to the track walking wheel structure and is connected to the I-shaped track 3 at the bottom of the coal mine tunnel 4 through the track walking wheel structure. A tilting mechanism is arranged between the lower end of the liftable support column and the track walking wheel structure. The gas detector 2 is installed below the mounting seat. A first sampling port and a second sampling port are respectively arranged at the front and rear ends of the gas detector. The first sampling port of the gas detector is connected to the coal mine tunnel gas detection structure arranged above the mounting seat. The second sampling port of the gas detector is connected to two extraction pipeline gas detection structures through three-way control valves. The two extraction pipeline gas detection structures are respectively installed on two liftable support columns. The present invention utilizes the track walking wheel structure to carry the detection system along the I-shaped track in the coal mine tunnel. Through the extraction pipeline gas detection structure and the coal mine tunnel gas detection structure, it can not only replace the inspectors to automatically complete the gas detection inside the coal mine tunnel, but also complete the gas detection in the gas suction pipeline system, which greatly reduces the work intensity and makes the gas detection accurate and convenient.

[0027] like Figure 2The gas detector shown is detachably connected to the bottom of the U-shaped sliding seat 6 through the lower mounting plate 5. The U-shaped sliding seat 6 is slidably connected to the outside of the mounting seat. The vertical section of the mounting seat is also U-shaped. A left-right adjustment servo motor is installed on the back of the U-shaped sliding seat. The output shaft of the left-right adjustment servo motor extends into the mounting seat and is connected to the rotating gear 7. The back of the mounting seat is provided with a through slot 16 for the output shaft of the left-right adjustment servo motor to pass through. The mounting seats on the upper and lower sides of the rotating gear are provided with matching tooth structures 8. The rotating gear is respectively meshed with the tooth structures on the upper and lower sides. The left and right ends of the mounting seat can also be detachably installed with limit baffles 9. The present invention can adjust the horizontal position of the gas detection structure of the coal mine tunnel by starting the left-right adjustment servo motor, so as to avoid obstacles in the coal mine tunnel. It can avoid obstacles not only by tilting, but also by translation. By using this design, gas detection can still be completed during the avoidance process, which plays a role in increasing practical performance.

[0028] like Figure 1 and Figure 2 The coal mine gas detection structure shown includes a guide support frame 10, a guide outer cylinder 11 and a telescopic detection tube 12. The guide support frame is fixed to the top of the U-shaped sliding seat through an upper mounting plate 13. The guide outer cylinder is vertically fixed between the upper end of the guide support frame and the upper mounting plate. The lower end of the telescopic detection tube passes through the guide support frame and extends into the guide outer cylinder and is connected to the rubber outer ring body. The rubber outer ring body is fixed to the outer side of the lower end of the telescopic detection tube and is connected to the guide outer cylinder in an upper and lower piston-like manner, extending into the guide outer cylinder. The lower end of the telescopic detection tube is open, and the rubber outer ring body is connected to the upper mounting plate through a first spring arranged in the guide outer cylinder body. An air guide hole is provided on the side wall of the lower end of the guide outer cylinder body, and the air guide hole is connected to the first sampling port through a first hose; a connecting seat 14 is fixed on the outer wall of the upper end of the telescopic detection tube, and a contact wheel 15 is installed on each of the left and right sides of the connecting seat. The telescopic detection tube contacts the top wall in the coal mine tunnel 4 through the contact wheel, and there is a gap between its upper end and the top wall in the coal mine tunnel 4. The present invention is provided with a contact wheel at the upper end of the telescopic detection tube. Through this design, the telescopic detection tube can be effectively prevented from colliding with the top wall of the coal mine tunnel, and the distance between its upper end and the top wall in the coal mine tunnel can be kept consistent, thereby ensuring the accuracy of the detection.

[0029] like Figure 1The liftable support column shown includes an upper column 17, a lower rod 18 and a lift adjustment electric cylinder 19. The upper end of the upper column is fixed to the bottom of the mounting seat. A guide hole matching the lower rod is provided at the bottom of the upper column. The upper end of the lower rod extends into the guide hole. The lift adjustment electric cylinder is installed on the outer wall of the lower end of the upper column and its shaft end is connected to the transmission member. A guide notch for the transmission member to extend into is also provided on the side wall of the upper column. The transmission member extends into the upper column along the guide notch and is connected to the upper end of the lower rod. The transmission member can slide up and down along the guide notch.

[0030] like Figure 1 and Figure 5 The lower end of the lower rod body is connected to the support block 20 as a whole, and the track walking wheel structure includes a support frame 21, a connecting frame 22 arranged above the support frame and connected to it as a whole, a walking wheel bracket 23 arranged below the support frame and connected to it as a whole, and a track walking wheel 25 installed on the walking wheel bracket. Two connecting frames are arranged above the support frame, and the two connecting frames are connected to the tilting mechanism arranged in the support block 20. A walking wheel bracket is respectively arranged at the bottom of the left and right ends of the support frame, and the two walking wheel brackets are arranged opposite to each other and reinforcing ribs 24 are arranged between the support frames. The two walking wheel brackets are connected to the I-shaped track 3 through the track walking wheel, and one of the walking wheel brackets is also equipped with a walking wheel driving motor 26 for driving the track walking wheel to rotate.

[0031] like Figure 1 and Figure 5 The tilt mechanism shown includes a support shaft 28 and an adjustable telescopic electric cylinder 27 installed horizontally in the lower end of the support block. A notch is provided at the bottom of the support block relative to the position of the two connecting frames. The two connecting frames extend into the support block from the notch and are connected to the support shaft. An adjustable telescopic electric cylinder is installed on each of the support frames on the front and rear sides of the support block. The adjustable telescopic electric cylinder is movably installed on the support frame and its shaft end is movably connected to the support block. The present invention can tilt the detection system by controlling the adjustable telescopic electric cylinders on the front and rear sides, thereby avoiding obstacles that cannot be avoided by left and right translation, thereby increasing practicality.

[0032] like Figure 3 and Figure 4The gas detection structure of the extraction pipeline shown includes a pipe reel 29, a conveying hose 30, a suction hose 31 and a suction detection head 32. A placement tube 33 for placing the suction detection head is provided on the outer wall of the upper cylinder. The suction detection head is composed of a conducting end, a threaded section and a fixed end connected in sequence. The conducting end is fixedly connected to the threaded section. An external thread is provided on the outer wall of the threaded section and is rotatably connected to the fixed end. A placement hole matching the fixed end is provided at one end of the placement tube. A limited transmission plate 34 is fixed on the outer wall of the threaded section. The pipe reel is hollow and its horizontal Rotatingly connected between two mounting plates 36, the two mounting plates 36 are connected with the mounting frame 37 as a whole and fixed to the outer wall of the upper column through the mounting frame, one end of the suction hose extends into the placement tube and is connected to the fixed end, the other end of the suction hose is wound on the hose reel and is connected to the internal space of the hose reel, a mechanical seal joint 38 connected to the hose reel is provided on the outer wall of one mounting plate, one end of the delivery hose is connected to the three-way control valve, the other end of the delivery hose is connected to the mechanical seal joint and is connected to the suction hose through the hose reel, and a crank 35 that rotates with the hose reel is provided on the other mounting plate. The present invention adopts this structure to not only quickly complete the detection of gas in the gas pipeline suction system, but also effectively avoid the occurrence of knots, obstructions and unnecessary damage to the suction hose.

[0033] like Figure 1 and Figure 6A tank 40 to be inspected that matches the gas detection structure of the extraction pipeline is fixed on the inner wall of the coal mine tunnel shown in the figure. The tank to be inspected is connected to the gas suction pipeline system 39 arranged in the coal mine tunnel. A switch valve is arranged between the tank to be inspected and the gas suction pipeline system 39. The tank to be inspected specifically consists of a tank body 40-1, an upper cover body 40-2, an inspection port 40-3 arranged on the side wall of the tank body, an exhaust pipe 42, a valve core 41 and a second spring 43. The lower end of the tank body is connected to the gas suction pipeline system 39, and the upper end of the tank body is sealed by the upper cover body. The inspection port is in an outward convex shape, and its inner wall is composed of an internal threaded section and a piston-type sealing section. The internal threaded section of the inspection port matches the threaded section of the suction detection head. The suction pipe is in a one-way sealing shape and is arranged horizontally. Its sealed end is located in the sampling port, and its open end extends into the tank body. The inner diameter of the conducting end of the suction detection head is larger than the outer diameter of the suction pipe. The valve core is in a ring shape and is piston-connected between the piston-type sealing section of the sampling port and the suction pipe. The valve core is also connected to the tank body through a second spring. A suction hole is provided on the outer wall of the suction pipe in the sampling port. The suction hole is sealed by the valve core. An external thread is provided on the outer wall of the open end of the suction pipe, which extends into the tank body and is connected to the nut structure 44 through the external thread. An annular protrusion connected to it is also provided on the outer wall of the suction pipe. The suction pipe is horizontally fixed to the side wall of the tank body through the cooperation of the annular protrusion and the nut structure. The present invention adopts this structure to achieve a good sealing effect, effectively avoid gas leakage, and is more convenient for disassembly and assembly and later maintenance. It has the advantages of simple structure, convenient use, practicality and high efficiency.

[0034] The present invention also provides a gas detection method for coal mines, which is specifically divided into a pipeline gas detection method and a gas detection method in a coal mine tunnel, wherein the pipeline gas detection method specifically refers to first driving the track walking wheel with the walking wheel driving motor to move it to the pipeline gas detection point with the detection system, pulling the suction detection head and connecting the threaded section into the sampling inspection port by rotating the limit transmission plate, using the conducting end to squeeze the valve core to open the suction hole, and then opening the switch valve between the tank to be sampled and the gas suction pipeline system, and then using the gas detector to perform gas detection, and the detection result is recorded and uploaded, and after the detection is completed, the switch valve is closed first, and then the gas is continued to be used. Use the gas detector to suck for 3-5s, then reversely rotate the limit transmission plate to separate the suction detection head from the sampling port, and turn the handle to put the suction detection head back into the placement tube for storage; the method for gas detection in the coal mine tunnel specifically refers to first making the contact wheel contact with the top of the coal mine tunnel through a liftable support column, so that the telescopic detection tube extends to the top of the coal mine tunnel, and then starting the walking wheel drive motor, and using it to drive the track walking wheel to move along the I-shaped track. During the movement, it avoids by lifting, translation and tilting. The gas detector conducts 3 inspections every 20-30m, and the maximum value is recorded and uploaded.

[0035] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A gas detection system for coal mines, characterized in that: The utility model comprises a long strip-shaped mounting seat, a liftable support column, a track walking wheel structure, a gas detector, an extraction pipeline gas detection structure and a coal mine tunnel gas detection structure. The mounting seat is horizontally placed and a liftable support column is vertically arranged at the bottom of each of the left and right ends. The lower end of the liftable support column is connected to the track walking wheel structure and is connected to the I-shaped track at the bottom of the coal mine tunnel through the track walking wheel structure. A tilting mechanism is arranged between the lower end of the liftable support column and the track walking wheel structure. The gas detector is installed below the mounting seat. A first sampling port and a second sampling port are respectively arranged at the front and rear ends of the gas detector. The first sampling port of the gas detector is connected to the coal mine tunnel gas detection structure arranged above the mounting seat. The second sampling port of the gas detector is connected to two extraction pipeline gas detection structures through three-way control valves. The two extraction pipeline gas detection structures are respectively installed on two liftable support columns.

2. A gas detection system for coal mines according to claim 1, characterized in that: The gas detector is detachably connected to the bottom of the U-shaped sliding seat through a lower mounting plate. The U-shaped sliding seat is slidably connected to the outside of the mounting seat left and right. The vertical cross-section of the mounting seat is also U-shaped. A left and right adjustment servo motor is installed on the back of the U-shaped sliding seat. The output shaft of the left and right adjustment servo motor extends into the mounting seat and is connected to the rotating gear. A through groove is provided on the back of the mounting seat for the output shaft of the left and right adjustment servo motor to pass through. The mounting seats on the upper and lower sides of the rotating gear are provided with matching tooth structures. The rotating gear is respectively meshed with the tooth structures on the upper and lower sides. Limit baffles can also be detachably installed on the left and right ends of the mounting seat.

3. A gas detection system for coal mines according to claim 2, characterized in that: The coal mine gas detection structure includes a guide support frame, a guide outer cylinder and a telescopic detection tube. The guide support frame is fixed to the top of the U-shaped sliding seat through an upper mounting plate. The guide outer cylinder is vertically fixed between the upper end of the guide support frame and the upper mounting plate. The lower end of the telescopic detection tube passes through the guide support frame and extends into the guide outer cylinder and is connected to the rubber outer ring body. The rubber outer ring body is fixed on the outside of the lower end of the telescopic detection tube and is piston-connected in the guide outer cylinder up and down. The lower end of the telescopic detection tube extending into the guide outer cylinder is open. The rubber outer ring body is connected to the upper mounting plate through a first spring arranged in the guide outer cylinder. An air guide hole is opened on the side wall of the lower end of the guide outer cylinder, and the air guide hole is connected to the first sampling port through a first hose.

4. A gas detection system for coal mines according to claim 3, characterized in that: A connecting seat is fixed on the outer wall of the upper end of the telescopic detection tube, and a contact wheel is installed on each of the left and right sides of the connecting seat. The telescopic detection tube contacts the top wall in the coal mine tunnel through the contact wheel and there is a gap between its upper end and the top wall in the coal mine tunnel.

5. A gas detection system for coal mines according to claim 1, characterized in that: The liftable support column includes an upper column body, a lower rod body and a lift adjustment electric cylinder. The upper end of the upper column body is fixed to the bottom of the mounting seat. A guide hole matching the lower rod body is provided at the bottom of the upper column body. The upper end of the lower rod body extends into the guide hole. The lift adjustment electric cylinder is installed on the outer wall of the lower end of the upper column body and its shaft end is connected to the transmission member. A guide notch for the transmission member to extend into is also provided on the side wall of the upper column body. The transmission member extends into the upper column body along the guide notch and is connected to the upper end of the lower rod body. The transmission member can slide up and down along the guide notch.

6. A gas detection system for coal mines according to claim 5, characterized in that: The lower end of the lower rod body is connected to the support block as a whole, and the track walking wheel structure includes a support frame, a connecting frame arranged above the support frame and connected to the support frame as a whole, a walking wheel bracket arranged below the support frame and connected to the support frame as a whole, and a track walking wheel installed on the walking wheel bracket. Two connecting frames are arranged above the support frame, and the two connecting frames are connected to the tilting mechanism arranged in the support block. A walking wheel bracket is respectively arranged at the bottom of the left and right ends of the support frame, and the two walking wheel brackets are arranged opposite to each other and reinforcing ribs are arranged between the support frames. The two walking wheel brackets are connected to the I-shaped track through the track walking wheel, and a walking wheel driving motor that drives the track walking wheel to rotate is also installed on one of the walking wheel brackets.

7. A gas detection system for coal mines according to claim 6, characterized in that: The tilting mechanism includes a support shaft and an adjustable telescopic electric cylinder horizontally installed in the lower end of the support block. A notch is opened at the bottom of the support block relative to the position of the two connecting frames. The two connecting frames extend into the support block from the notch and are connected to the support shaft. An adjustable telescopic electric cylinder is installed on each of the support frames on the front and rear sides of the support block. The adjustable telescopic electric cylinder is movably installed on the support frame and its shaft end is movably connected to the support block.

8. A gas detection system for coal mines according to claim 1, characterized in that: The extraction pipeline gas detection structure includes a pipe reel, a delivery hose, a suction hose and a suction detection head. A placement tube for placing the suction detection head is arranged on the outer wall of the upper cylinder. The suction detection head is composed of a conducting end, a threaded section and a fixed end connected in sequence. The conducting end is fixedly connected to the threaded section. An external thread is arranged on the outer wall of the threaded section and is rotatably connected to the fixed end. A placement hole matching the fixed end is opened at one end of the placement tube. A limited transmission plate is fixed on the outer wall of the threaded section. The pipe reel is hollow and its horizontal rotation The utility model discloses a kind of rotatable conveying device, and the utility model discloses a rotatable conveying device, and the rotatable conveying device is a kind of ...

9. A gas detection system for coal mines according to claim 8, characterized in that: A tank to be inspected that matches the gas detection structure of the extraction pipeline is fixed on the inner wall of the coal mine tunnel. The tank to be inspected is connected to the gas suction pipeline system arranged in the coal mine tunnel. A switch valve is arranged between the tank to be inspected and the gas suction pipeline system. The tank to be inspected specifically consists of a tank body, an upper cover body, a sampling port arranged on the side wall of the tank body, an exhaust pipe, a valve core and a second spring. The lower end of the tank body is connected to the gas suction pipeline system, and the upper end of the tank body is sealed by the upper cover body. The sampling port is in an outward convex shape, and its inner wall is composed of an internal threaded section and a piston-type sealing section. The internal threaded section of the sampling port matches the threaded section of the suction detection head. The exhaust pipe is in a one-way sealed shape and is The air suction pipe is connected with the air suction pipe in a horizontal direction, and the air suction pipe is connected with the air suction pipe in a horizontal direction.

10. A gas detection method for coal mines, characterized in that: It is specifically divided into pipeline gas detection method and coal mine gas detection method. The pipeline gas detection method specifically refers to first driving the track walking wheel with the walking wheel driving motor to move it to the pipeline gas detection point with the detection system, pulling the suction detection head and connecting the threaded section into the sampling inspection port by rotating the limit transmission plate, using the conducting end to squeeze the valve core to open the suction hole, and then open the switch valve between the tank to be inspected and the gas suction pipeline system, and then use the gas detector to perform gas detection, and the detection results are recorded and uploaded. After the detection is completed, the switch valve is closed first, and then the gas detector is used to continue to suck for 3-5 seconds. s, then reversely rotate the limit transmission plate to separate the suction detection head from the sampling inspection port, and turn the crank to put the suction detection head back into the placement tube for storage; the method for gas detection in the coal mine tunnel specifically refers to first making the contact wheel contact with the top of the coal mine tunnel through a liftable support column, so that the telescopic detection tube extends to the top of the coal mine tunnel, and then starting the walking wheel drive motor, using it to drive the track walking wheel to move along the I-shaped track. During the movement, it avoids by lifting, translation and tilting. The gas detector conducts 3 random inspections every 20-30m, and the maximum value is recorded and uploaded.

Images