A coal mine underground gas concentration monitoring device and gas concentration control system

Abstract

The present application relates to the field of monitoring alarm device, specifically discloses a kind of coal mine underground gas concentration monitoring device and gas concentration control system, comprising: gas detector body top is equipped with siren, gas detector body one side is sealingly connected with fan, fan one end is sealingly connected with connecting pipe through flange, and connecting pipe end is fixedly connected with rectangular tube;Sealing sleeve frame is equipped with several, sealing sleeve frame is vertically fixedly connected with rectangular tube bottom tube body, slidingly connected with slider in sealing sleeve frame, and air duct is formed in slider one side;Guide rail is fixedly connected at the top of rectangular tube, and guide rail below is communicated with rectangular tube interior, slidingly connected with sliding mounting seat in guide rail inner wall, and sliding mounting seat bottom is fixedly connected with travelling crane frame, travelling crane frame bottom is rotatably connected with roller, and roller and slider top are intermittently connected with rolling connection, solve the existing gas concentration monitoring, gas detector is fixed at a place, prone to the problem of smaller monitoring range.

Description

Technical Field

[0001] This invention relates to the field of monitoring and alarm devices, specifically to a coal mine underground gas concentration monitoring device and a gas concentration control system. Background Technology

[0002] In coal mining operations, it is inevitable that the tunnel will pass through gas-bearing areas during construction. If the gas concentration in the mine is too high, it can easily cause an explosion and safety accident. Therefore, monitoring gas is particularly important during coal mining.

[0003] Chinese patent CN213298056U discloses a tunnel gas concentration monitoring and early warning device, including a housing. An air passage is fixedly installed at the rear end of the inner end of the housing. The upper and lower ends of the air passage pass through the upper and lower ends of the housing, respectively. A central controller, a gas concentration sensor, and a buzzer are installed at the inner end of the housing. A data display screen is fixedly installed on the front wall of the housing. The sensing end of the gas concentration sensor passes through the side wall of the air passage and extends to the inner end of the air passage. The output end of the gas concentration sensor is electrically connected to the central controller. The output end of the central controller is electrically connected to the input end of the buzzer and the data display screen.

[0004] However, when monitoring the gas concentration inside a tunnel, the gas monitoring equipment is usually fixed in one place and the gas concentration is only monitored at that location. This monitoring method can only monitor the gas concentration in a relatively small area. Summary of the Invention

[0005] The purpose of this invention is to provide a coal mine underground gas concentration monitoring device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coal mine underground gas concentration monitoring device, the coal mine underground gas concentration monitoring device comprising:

[0007] The gas detector body has an alarm on the top and a fan sealed to one side of the gas detector body. One end of the fan is sealed to a connecting pipe through a flange, and a rectangular tube is fixedly connected to the end of the connecting pipe.

[0008] A sealing frame is provided, and the sealing frame is vertically and fixedly connected to the bottom tube of the rectangular tube. A slider is slidably connected inside the sealing frame, and an air duct is opened on one side of the slider.

[0009] The guide rail is fixedly connected to the top of the rectangular tube, and the bottom of the guide rail is connected to the inside of the rectangular tube. A sliding mounting seat is slidably connected to the inner wall of the guide rail. A traveling frame is fixedly connected to the bottom of the sliding mounting seat. A roller is rotatably connected to the bottom of the traveling frame. The roller and the top of the slider are intermittently engaged in rolling connection.

[0010] Preferably, a plurality of the sealing sleeves are equidistantly distributed at the bottom of the rectangular tube, and the connection between the sealing sleeves and the rectangular tube is sealed. The sealing sleeves have a rectangular frame structure and connect the inside of the rectangular tube with the external environment.

[0011] Preferably, the slider has a cuboid structure, and the sidewalls of the slider are tightly fitted with the sealing sleeve frame. The top of the slider has rounded corners on two sides perpendicular to the rectangular tube routing lines, and the top of the slider has an overall arched structure.

[0012] Preferably, the air duct has an overall L-shaped structure, with the top opening of the air duct located near the center of one side of the top arched surface of the slider, and the bottom opening of the air duct located near the bottom of one side wall of the slider.

[0013] Preferably, a limiting plate is fixedly connected to the bottom of the sealing sleeve frame. The limiting plate has an overall U-shaped structure. An installation groove is provided on the side of the slider away from the bottom opening of the air duct. The installation groove also has a U-shaped cross-section and complements the limiting plate. The limiting plate is slidably connected to the installation groove.

[0014] Preferably, a spring is vertically fixed to the top of the limiting plate. There are four springs, which are evenly distributed vertically above the limiting plate. The top of the spring is in close contact with the top wall of the mounting groove.

[0015] Preferably, the guide rail is fixedly connected to the top of the rectangular tube in an inverted manner, and a reciprocating screw is rotatably connected to the end walls of both ends of the guide rail. A motor is fixedly connected to the outer side of the end wall of the guide rail near the fan, and one end of the reciprocating screw passes through the end wall of the guide rail and is fixedly connected to the output end of the motor.

[0016] Preferably, the sliding mounting base has a mounting hole that is threadedly connected to the reciprocating lead screw, and the sliding mounting base is threadedly connected to the reciprocating lead screw.

[0017] Preferably, the cross-sectional shape of the crane frame is U-shaped, and fixed shafts are vertically fixedly connected to the two side walls at the bottom of the crane frame. The roller is rotatably connected to the shaft body of the fixed shaft located in the groove at the bottom of the crane frame. Limiting strips are fixedly connected to the inner side wall of the rectangular tube. There are four limiting strips, and the four limiting strips are arranged in pairs to cooperate with each other to form a limiting groove. The two ends of the fixed shaft are slidably connected to the limiting grooves formed by the two sets of limiting strips.

[0018] A gas concentration control system includes the aforementioned underground gas concentration monitoring device for coal mines.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This invention uses a motor to drive a reciprocating lead screw to rotate, which, in conjunction with the threaded connection of the sliding mounting base and the limiting action of the guide rail and the limiting strip, drives the gantry frame to reciprocate linearly inside the rectangular tube. The bottom roller of the gantry frame contacts and slides against each slider, pushing the slider downwards. This allows external ambient gas to enter the rectangular tube from each section of the pipeline and be drawn into the tube by a fan for detection. This solves the problem of limited monitoring range caused by fixing the gas detector in one place in existing gas concentration monitoring methods. Furthermore, through the cooperation between the gas detector and the motor, when the gas concentration in the current area exceeds the standard, the fan can draw in and treat the air in that area, thereby reducing the gas concentration and minimizing safety hazards. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall internal structure of the present invention;

[0023] Figure 3 This is a cross-sectional view of the connection structure between the sealing sleeve frame and the slider in this invention;

[0024] Figure 4 This is a cross-sectional view of the slider structure in this invention.

[0025] In the diagram: 1. Gas detector body; 2. Alarm; 3. Fan; 4. Connecting pipe; 5. Rectangular tube; 6. Guide rail; 7. Motor; 8. Sealing sleeve frame; 9. Slider; 10. Reciprocating screw; 11. Limiting strip; 12. Sliding mounting seat; 13. Crane frame; 14. Fixed shaft; 15. Roller; 16. Limiting plate; 17. Spring; 18. Air duct; 19. Mounting groove. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1:

[0028] Please see Figures 1-4 This invention provides a technical solution: a coal mine underground gas concentration monitoring device, comprising: a gas detector body 1, an alarm 2 on the top of the gas detector body 1 for convenient alarm to alert workers that the gas concentration is too high; a fan 3 sealed to one side of the gas detector body 1, a connecting pipe 4 sealed to one end of the fan 3 via a flange, and a rectangular tube 5 fixedly connected to the end of the connecting pipe 4; the fan 3 provides power to draw gas from inside the rectangular tube 5 and blow it to the gas detector body 1 for convenient detection; a sealing frame 8, of which several are provided, and the sealing frame 8 is vertically fixedly connected to the bottom of the rectangular tube 5; a slider 9 is slidably connected inside the sealing frame 8, and an air duct 18 is opened on one side of the slider 9, through which air is drawn through the several sealing frames 18. A cover frame 8 is slidably connected to several sliders 9, which are distributed in different sections of the rectangular tube 5 to facilitate the detection of methane concentration in different areas and avoid missed detections due to poor gas flow inside the mine tunnel; a guide rail 6 is fixedly connected to the top of the rectangular tube 5 and communicates with the inside of the rectangular tube 5 below; a sliding mounting seat 12 is slidably connected to the inner wall of the guide rail 6; a traveling frame 13 is fixedly connected to the bottom of the sliding mounting seat 12; a roller 15 is rotatably connected to the bottom of the traveling frame 13; the roller 15 and the top of the slider 9 are intermittently engaged in rolling connection, thereby pushing the slider 9 downward to ensure the air duct 18 is unobstructed; each fixed connection in the device is equipped with a sealing component; a methane concentration control system includes the above-mentioned underground methane concentration monitoring device for coal mines.

[0029] By drawing air from inside the rectangular tube 5 using the blower 3, a negative pressure environment is created inside the rectangular tube 5. The sliding mounting seat 12 drives the roller 15 to move above one of the sliders 9, pushing the slider 9 downward, thereby clearing the air duct 18 of the slider 9. This allows the gas from the outside of the rectangular tube 5 in that area to be drawn and transported to the gas detector body 1, thus enabling periodic checks on the gas concentration in different areas along the wiring of the rectangular tube 5. This solves the problem of discrepancies between the detection results and the actual situation caused by poor air circulation inside the mine tunnel, thereby reducing safety hazards.

[0030] Example 2:

[0031] Based on Example 1, in order to ensure measurement accuracy, several sealing frames 8 are equidistantly distributed at the bottom of the rectangular tube 5, and the connection between the sealing frames 8 and the rectangular tube 5 is sealed to prevent gas leakage from causing errors in the detected concentration. The sealing frames 8 have a rectangular frame structure and connect the inside of the rectangular tube 5 with the external environment. The slider 9 has a cuboid structure, and the side wall of the slider 9 fits tightly with the sealing frames 8. The top of the slider 9 has rounded corners on two sides perpendicular to the routing of the rectangular tube 5. The top of the slider 9 has an arched structure to facilitate the sliding connection of the roller 15 with it and to apply a downward thrust to the slider 9. The air duct 18 has an L-shaped structure. The top opening of the air duct 18 is located near the center of one side of the arched surface of the top of the slider 9, and the bottom opening of the air duct 18 is located near the bottom of one side wall of the slider 9. Under normal conditions, the bottom opening of the air duct 18 is blocked by the inner side wall of the sealing frames 8.

[0032] By equidistantly distributing several sealing frames 8 along the rectangular tube 5 pipeline, it is convenient to detect the gas concentration in different areas along the pipeline path of the rectangular tube 5. Under normal circumstances, each area of ​​the rectangular tube 5 is a closed pipeline structure, avoiding the existence of gaps that could leak gas, thus preventing the sampling gas from mixing with the leaked gas and affecting the actual gas concentration of the sampling gas.

[0033] Example 3:

[0034] Based on Embodiment 1, in order to facilitate the limiting and guiding of the slider 9 and ensure that the air duct 18 is in a closed state under normal conditions, a limiting plate 16 is fixedly connected to the bottom of the sealing sleeve frame 8. The limiting plate 16 has an overall U-shaped structure and is fixedly connected to the inner side wall of the sealing sleeve frame 8 by bolts. An installation groove 19 is provided on the side of the slider 9 away from the bottom opening of the air duct 18. The cross-sectional shape of the installation groove 19 is also U-shaped and complements the limiting plate 16. The limiting plate 16 and the installation groove 19 are slidably connected. A spring 17 is vertically fixedly connected to the top of the limiting plate 16. There are four springs 17, which are evenly distributed vertically above the limiting plate 16. The top of the spring 17 is in close contact with the top wall of the installation groove 19.

[0035] The spring 17 pushes the slider 9 downwards, and further contacts the bottom of the limiting plate 16 above the bottom wall of the mounting groove 19, thereby limiting the position of the slider 9 inside the sealing frame 8. This ensures that the top of each slider 9 is at the same height under normal conditions, which facilitates the application of thrust by the roller 15. At the same time, it ensures that the bottom opening of the air duct 18 is always blocked by the inner wall of the sealing frame 8 under normal conditions.

[0036] Example 4:

[0037] Based on Embodiment 1, to facilitate the automatic reciprocating linear motion of the crane frame 13 and ensure the stability of the crane frame 13's motion, the guide rail 6 is fixedly connected to the top of the rectangular tube 5 in an inverted manner. The top of the rectangular tube 5 has a slot that mates with the guide rail 6. The side walls of the guide rail 6 smoothly transition to the slot walls at the top of the rectangular tube 5. Reciprocating screws 10 are rotatably connected to the end walls of both ends of the guide rail 6. A motor 7 is fixedly connected to the outer side of the end wall of the guide rail 6 near the fan 3. One end of the reciprocating screw 10 passes through the end wall of the guide rail 6 and is fixedly connected to the output end of the motor 7. The sliding mounting base 12 has a mounting hole that is threadedly connected to the reciprocating screw 10. The sliding mounting base 12 and the reciprocating screw 10... The 0-threaded connection is powered by the motor 7 to rotate the reciprocating screw 10, which in turn drives the sliding mounting seat 12 to move the gantry frame 13 reciprocating branch line. The gantry frame 13 has a U-shaped cross section, and fixed shafts 14 are vertically fixed to the two side walls at the bottom of the gantry frame 13. The roller 15 is rotatably connected to the shaft of the fixed shaft 14 located in the groove at the bottom of the gantry frame 13. Limiting strips 11 are fixedly connected to the inner side wall of the rectangular tube 5. There are four limiting strips 11. The four limiting strips 11 are arranged in pairs to form a limiting groove, which facilitates the engagement of the end of the fixed shaft 14. The two ends of the fixed shaft 14 are slidably connected to the limiting groove formed by the two sets of limiting strips 11.

[0038] The limiting groove formed by the combination of two sets of limiting strips 11 slides and limits the fixed shaft 14, which is used to share the upward reaction force generated by the gantry frame 13 pushing the slider 9, and to prevent the guide rail 6 and the reciprocating screw 10 from deforming due to excessive radial force.

[0039] Example 5:

[0040] Based on Example 1, in order to further optimize the function of the detection device and improve the safety of the working environment, a gas processing device is provided at one end of the gas detector body 1. The gas processing device is connected to the fan 3 pipeline. The detection probe of the gas detector body 1 is located at the gas outlet of the fan 3 pipeline and is electrically connected to the alarm 2. The alarm 2 is electrically connected to the motor 7.

[0041] The gas extraction device treats the gas drawn out by the blower 3 to prevent gas leakage. At the same time, when the alarm 2 sounds, it sends an electrical signal to the motor 7 to stop the motor. At this time, the roller 15 slides into contact with the slider 9 at the gas excess area, so that the air duct 18 is unobstructed. This allows the gas in the rectangular tube 5 with excessive gas concentration to be extracted and treated, reducing safety hazards. The motor 7 is restarted after the gas detector body 1 detects that the gas concentration of the extracted gas has reached the standard.

[0042] In actual use, the rectangular tube 5 runs in a straight line and is fixedly installed near the top of the mine tunnel. During testing, the blower 3 and motor 7 are started. The blower 3 provides power to continuously draw gas from inside the rectangular tube 5, and the motor 7 drives the reciprocating screw 10 to rotate. The sliding mounting seat 12 and the traveling frame 13 are fixed as an integral structure. Under the limiting action of the limiting strip 11 and the guide rail 6, the traveling frame 13 makes reciprocating linear motion inside the rectangular tube 5. When the traveling frame 13 moves above one of the sliders 9, the bottom roller 15 of the traveling frame 13 contacts the top of the slider 9, and pushes the slider 9 downward through the arched shape of the top of the slider 9, so that the bottom opening of the air duct 18 is freed from the obstruction of the sealing sleeve frame 8, making the air duct 18 unobstructed. The external gas in this section of the rectangular tube 5 enters the interior of the rectangular tube 5 through the air duct 18, and is then transported to the position of the gas detector body 1 under the suction action of the blower 3, completing the internal gas flow of the rectangular tube 5 in this section of the mine tunnel. This invention for detecting methane gas content uses a motor 7 to drive a reciprocating screw 10 to rotate. This, in conjunction with the threaded connection of the sliding mounting base 12 and the limiting positions of the guide rail 6 and the limiting strip 11, drives the gantry frame 13 to perform reciprocating linear motion inside the rectangular tube 5. The bottom roller 15 of the gantry frame 13 contacts and slides with each slider 9, thereby pushing the slider 9 downward. This allows external ambient gas in each section of the rectangular tube 5 to enter the interior of the rectangular tube 5 and be drawn to the methane detector body 1 by the fan 3 for detection. This solves the problem that fixing the methane detector in one place when monitoring methane concentration in existing methods can easily lead to a small monitoring range. Furthermore, through the cooperation between the methane detector body 1 and the motor 7, when the methane concentration in the current area exceeds the standard, the fan 3 can draw in and treat the air in that area, thereby reducing the methane concentration in the gas environment and reducing safety hazards.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coal mine underground gas concentration monitoring device, characterized in that: The underground gas concentration monitoring device in the coal mine includes: The gas detector body (1) is equipped with an alarm (2) on the top of the gas detector body (1). A fan (3) is sealed and connected to one side of the gas detector body (1). A connecting pipe (4) is sealed and connected to one end of the fan (3) through a flange. A rectangular pipe (5) is fixedly connected to the end of the connecting pipe (4). A sealing frame (8) is provided in several parts. The sealing frame (8) is vertically and fixedly connected to the bottom tube of the rectangular tube (5). A slider (9) is slidably connected inside the sealing frame (8). An air duct (18) is opened on one side of the slider (9). The guide rail (6) is fixedly connected to the top of the rectangular tube (5), and the bottom of the guide rail (6) is connected to the inside of the rectangular tube (5). A sliding mounting seat (12) is slidably connected to the inner wall of the guide rail (6). A traveling frame (13) is fixedly connected to the bottom of the sliding mounting seat (12). A roller (15) is rotatably connected to the bottom of the traveling frame (13). The roller (15) is intermittently engaged and rolled in a rolling connection with the top of the slider (9). The bottom of the sealing sleeve frame (8) is fixedly connected to a limiting plate (16). The limiting plate (16) has an overall structure in the shape of a U-shape. The slider (9) has an installation groove (19) on the side away from the bottom opening of the air duct (18). The cross-sectional shape of the installation groove (19) is also U-shaped, and it complements the limiting plate (16). The limiting plate (16) and the installation groove (19) are slidably connected. A spring (17) is vertically fixedly connected to the top of the limiting plate (16). There are four springs (17). The four springs (17) are evenly distributed vertically above the limiting plate (16). The top of the springs (17) is in close contact with the top wall of the installation groove (19).

2. The coal mine underground gas concentration monitoring device according to claim 1, characterized in that: Several sealing frames (8) are evenly distributed at the bottom of the rectangular tube (5), and the connection between the sealing frame (8) and the rectangular tube (5) is sealed. The sealing frame (8) has a rectangular frame structure and connects the inside of the rectangular tube (5) with the external environment.

3. The coal mine underground gas concentration monitoring device according to claim 1, characterized in that: The slider (9) has a cuboid structure, and the side wall of the slider (9) is tightly fitted with the sealing sleeve frame (8). The top of the slider (9) has rounded corners on two sides perpendicular to the routing of the rectangular tube (5). The top of the slider (9) is an arched structure.

4. The coal mine underground gas concentration monitoring device according to claim 1, characterized in that: The air duct (18) has an overall L-shaped structure. The top opening of the air duct (18) is located near the center of the top arched surface of the slider (9), and the bottom opening of the air duct (18) is located near the bottom of one side wall of the slider (9).

5. The coal mine underground gas concentration monitoring device according to claim 1, characterized in that: The guide rail (6) has a rectangular box structure and is fixedly connected to the top of the rectangular tube (5) in an upside-down manner. The two end walls of the guide rail (6) are rotatably connected to a reciprocating screw (10). The outer side of the end wall of the guide rail (6) near the fan (3) is fixedly connected to a motor (7). One end of the reciprocating screw (10) passes through the end wall of the guide rail (6) and is fixedly connected to the output end of the motor (7).

6. The coal mine underground gas concentration monitoring device according to claim 1, characterized in that: The sliding mounting base (12) has a mounting hole that is threadedly connected to the reciprocating lead screw (10), and the sliding mounting base (12) is threadedly connected to the reciprocating lead screw (10).

7. The coal mine underground gas concentration monitoring device according to claim 1, characterized in that: The gantry frame (13) has an inverted U-shaped structure, and a fixed shaft (14) is vertically fixed to the two side walls at the bottom of the gantry frame (13). The roller (15) is rotatably connected to the shaft of the fixed shaft (14) located in the groove at the bottom of the gantry frame (13). Limiting strips (11) are fixedly connected to the inner side wall of the rectangular tube (5). There are four limiting strips (11). The four limiting strips (11) are arranged in pairs to form a limiting groove. The two ends of the fixed shaft (14) are slidably connected to the limiting groove formed by the two sets of limiting strips (11).

8. A gas concentration control system, characterized in that: The coal mine underground gas concentration monitoring device includes any one of the claims 1-7 above.

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