A device and method for testing friction sparks in non-metallic materials used in mining.

Abstract

This invention discloses a friction spark testing device and method for non-metallic materials used in mining, comprising a main body of the testing device, an operating control console, and a gas supply source. The main body of the testing device is connected to both the operating control console and the gas supply source. The main body of the testing device includes a test platform, a test chamber, a friction disc, a rotary drive assembly, and a pneumatic clamping assembly. The rotary drive assembly, the test chamber, and the pneumatic clamping assembly are all mounted on the test platform. One end of the rotary drive assembly extends into the test chamber and is rotatably connected to it. The friction disc is fixedly connected to the end of the rotary drive assembly located inside the test chamber. One end of the pneumatic clamping assembly is fixedly connected to the test platform, and the other end is retractably connected to the test chamber. The pneumatic clamping assembly is connected to both the gas supply source and the operating control console, and the rotary drive assembly is connected to the operating control console. This invention can effectively and reliably verify the explosion-proof performance and wear resistance of non-metallic materials used in underground mining.

Description

Technical Field

[0001] This invention belongs to the technical field of testing devices for coal mines, specifically relating to a testing device and method for friction sparks of non-metallic materials used in mining. Background Technology

[0002] Because friction between metal or non-metal materials in underground mines may cause explosions of flammable gases, the safety performance of metal or non-metal materials under friction conditions in underground mines is receiving increasing attention. Therefore, before using materials, it is necessary to conduct tests under friction conditions to verify their explosion-proof performance and wear performance, and whether they meet the standards for use in underground mines. When the temperature generated by friction of a material sample exceeds 150°C or sparks are generated, it may ignite flammable explosive gases or coal dust. Under specified specific pressure and in a flammable explosive gas environment, metal or non-metal materials undergo relative frictional movement. During the friction process, their wear performance and explosion-proof performance should meet the requirements of industry safety standards. Industry safety standards stipulate that: (1) When a material sample is subjected to friction testing in a sealed explosion-proof box, friction sparks or friction temperature rise must not ignite or ignite flammable explosive gases; (2) The test temperature must not exceed 150°C; (3) The maximum friction coefficient and wear amount generated by the material sample during the friction process should meet the requirements of the product design.

[0003] Currently, existing friction testing devices and methods for verifying the explosion-proof and wear-resistance properties of non-metallic materials used in underground mining have the following problems: During the friction test, parameters such as the friction temperature of the material sample and the friction rotation speed of the friction disc cannot be effectively monitored and displayed in real time; and the clamping force applied to the material sample on the friction disc cannot be adjusted according to different force requirements. Therefore, there is an urgent need to develop a testing device and method that can effectively solve the above problems for verifying the explosion-proof and wear-resistance properties of non-metallic materials used in underground mining. Summary of the Invention

[0004] The present invention addresses the above-mentioned problems and overcomes the shortcomings of the prior art by providing a device and method for testing friction sparks in non-metallic materials used in mining.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] On one hand, the present invention provides a friction spark testing device for non-metallic materials used in mining, including a main body of the testing device, an operation control console, and a gas supply source, wherein the main body of the testing device is connected to the operation control console and the gas supply source respectively;

[0007] The main body of the test device includes a test bench, a test chamber, a rotary drive assembly, and a pneumatic clamping assembly. The rotary drive assembly, the test chamber, and the pneumatic clamping assembly are all installed on the test bench. One end of the rotary drive assembly extends into the test chamber and is rotatably connected to the test chamber. A friction disc is fixedly connected to the end of the rotary drive assembly located in the test chamber.

[0008] One end of the pneumatic clamping assembly is fixedly connected to the test bench, and the other end of the pneumatic clamping assembly is reciprocally connected to the test chamber and opposite to the friction disk. A non-metallic material sample block is fixed on the end of the pneumatic clamping assembly opposite to the friction disk. The pneumatic clamping assembly is connected to the air supply source and the operation control console respectively. The rotary drive assembly is connected to the operation control console.

[0009] The friction spark test device for non-metallic materials used in mining also includes a methane detector, a temperature measuring device, and an igniter. The temperature measuring device and the igniter are both located inside the test chamber. The temperature measuring device and the igniter are both connected to the operation control console. The methane detector is connected to the inside of the test chamber and is used to measure the concentration of the methane-air mixture in the test chamber in real time.

[0010] In a preferred embodiment of the present invention, the test bench is provided with a first mounting frame, a second mounting frame, and a third mounting frame, which are connected from top to bottom on the test bench. The rotary drive assembly includes a drive motor, a small pulley, a transmission belt, a large pulley, a first bearing housing, a second bearing housing, a first coupling, a torque and speed sensor, a second coupling, a thrust bearing, and a main shaft. The drive motor is mounted on the third mounting frame, and the power output shaft of the drive motor is connected to the small pulley. The first bearing housing, the large pulley, the second bearing housing, the first coupling, the torque and speed sensor, and the second coupling are sequentially mounted on the first mounting frame and connected together by the main shaft. The main shaft is connected to the test chamber via a thrust bearing, and the small pulley and the large pulley are connected via a transmission belt. One end of the pneumatic clamping assembly is fixedly mounted on the top of the test bench and is positioned opposite to the rotary drive assembly.

[0011] As another preferred embodiment of the present invention, the test chamber is fixedly installed on the second mounting frame. The test chamber is provided with a first shaft mounting hole, a second shaft mounting hole, and a rod mounting hole. A mixing fan is also provided on the second mounting frame. The power output shaft end of the mixing fan passes through the second shaft mounting hole into the test chamber and is connected to a fan. A thrust bearing is fixedly installed on the first shaft mounting hole. The two sides of the thrust bearing are fixedly installed on the first shaft mounting hole of the test chamber by locking rings and guard plates. The other end of the pneumatic clamping assembly is connected to the rod mounting hole.

[0012] As another preferred embodiment of the present invention, the pneumatic clamping assembly includes a cylinder, a pressure sensor, a push rod, and a push rod sleeve. The push rod sleeve is fixedly connected to the rod mounting hole position inside the test chamber. The push rod passes through the rod mounting hole and the push rod sleeve and can reciprocate therein. The cylinder is fixedly connected to the top of the test bench. A pressure sensor is connected between the cylinder and the push rod. The push rod is opposite to the friction disc. A placement groove is opened on the opposite end of the push rod and the friction disc. A non-metallic material sample block is fixed in the placement groove.

[0013] Furthermore, the cylinder is also connected to a cylinder solenoid valve, which is fixedly installed on the first mounting frame. The cylinder solenoid valve is connected between the cylinder and the air supply source, and is also connected to the operation control console. The reciprocating motion of the cylinder is controlled by the cylinder solenoid valve, thereby driving the push rod to move.

[0014] As another preferred embodiment of the present invention, the test chamber includes a sealed chamber and a flip-top. The flip-top is sealed at the top of the sealed chamber. A temperature measuring device and an igniter are installed inside the sealed chamber. The temperature measuring device uses thermocouples, which are evenly distributed inside the sealed chamber. An igniter hole and a temperature probe wire lead-out hole are provided on the wall of the sealed chamber. The temperature probe wire connected to the thermocouple is led out of the sealed chamber through the temperature probe wire lead-out hole and electrically connected to the operating control console. The ignition control wire connected to the igniter is led out of the sealed chamber through the igniter hole and electrically connected to the operating control console.

[0015] As another preferred embodiment of the present invention, the top of the sealed chamber is open, one end of the flip cover is hinged to the top opening of the sealed chamber, and the other end of the flip cover is sealed to the sealed chamber by a cover lock. The flip cover is provided with a pressure relief port, which communicates with the inside of the test chamber. The pressure relief port is covered with a plastic film and tied tightly.

[0016] As another preferred embodiment of the present invention, the sealed box is further provided with an observation window, a detection nozzle, an air vent, and an air filling nozzle, and the detection nozzle is connected to a methane detector.

[0017] As another preferred embodiment of the present invention, the operation console includes a control panel, a control box, and an electrical control circuit. The electrical control circuit is located inside the control box, and the control panel is located on the front side of the control box. The control panel is equipped with a temperature digital display, a speed and torque digital display, a pressure digital display, start and stop buttons for controlling the operation of the rotary drive assembly and the pneumatic pressing assembly, a scheduling knob for controlling the rotation speed of the rotary drive assembly, start and stop buttons for controlling the operation of the mixing fan, and start and stop buttons for controlling the operation of the igniter.

[0018] On the other hand, the present invention provides a method for testing friction sparks in non-metallic materials used in mining, comprising the following steps:

[0019] (1). Connect the power supply to the main body of the test device and the operating console. The temperature digital display, speed and torque digital display, and pressure digital display on the operating console will all light up and enter the working state.

[0020] (2). Fix the non-metallic material sample block in the placement slot at the end of the top rod inside the test chamber, close the flip cover of the test chamber and lock it tightly with the cover lock, and cover and tie the pressure relief port with plastic film.

[0021] (3) Fill the sealed chamber of the test chamber with a standard methane and air mixture through the gas filling nozzle, and use a methane detector to measure the concentration of the methane and air mixture in the sealed chamber of the test chamber in real time through the detection nozzle. Stop filling when the gas concentration reaches the required level.

[0022] (4). Press the start button on the control panel to control the operation of the mixing fan. The mixing fan will drive the fan to run, so that the explosive mixed gas is evenly distributed in the sealed chamber of the test chamber.

[0023] (5) Connect the cylinder of the pneumatic pressing assembly to the air supply source, press the start button on the control console to control the cylinder to work, the cylinder drives the push rod to press the non-metallic material sample block onto the friction plate, control the cylinder solenoid valve through the control console, and adjust the pressure of the cylinder on the friction plate to achieve the design specific pressure required for the non-metallic material sample block, and keep this specific pressure constant.

[0024] (6). Press the start button on the control console to control the operation of the drive motor of the rotary drive component. Control the drive motor to rotate and accelerate it by the scheduling knob. After reaching the required number of revolutions for the non-metallic material sample block, the friction disk stabilizes at the required number of revolutions.

[0025] (7). The temperature display on the control panel shows the temperature between the friction disc and the non-metallic material sample block. When the temperature exceeds 150°C, press the stop button on the control panel to stop the drive motor of the rotating drive component. The friction disc will stop rotating.

[0026] (8) If the methane and air mixture in the sealed chamber of the test chamber is not ignited during the test, and the temperature of the friction disc and the non-metallic material sample block does not exceed 150°C when they reach thermal equilibrium, and it is necessary to manually ignite the methane and air mixture, press the start button on the control panel to start the igniter and ignite the mixture; after the explosion, the gas and flame will be discharged through the pressure relief port, and the test will end.

[0027] (9) During the test, record the dimensions of the non-metallic material sample block, the pressure on the non-metallic material sample block, the rotation speed of the friction disc, the highest temperature of the non-metallic material sample block, and the concentration of the test gas in the sealed chamber of the test chamber before and after the test.

[0028] (10) Calculate the wear amount and friction coefficient based on the thickness of the non-metallic material sample block measured before and after the test.

[0029] The beneficial effects of this invention are as follows:

[0030] This invention can effectively and reliably verify the explosion-proof performance and wear resistance of non-metallic materials used in underground mines, and has the following advantages: the clamping force of the non-metallic material sample block can be adjusted according to different force requirements; the relative rotation speed of the friction disc can be adjusted according to different requirements, with a maximum operating speed of up to 20m / s; the data acquisition is real-time and accurate, and the temperature of the non-metallic material sample block and the temperature, rotation speed, torque and other values ​​of the friction disc can be displayed in real time. Attached Figure Description

[0031] Figure 1 This is a schematic block diagram illustrating the components of the present invention;

[0032] Figure 2 This is a schematic diagram of the main structure of the test apparatus of the present invention;

[0033] Figure 3 This is one of the schematic diagrams of the test chamber structure of the present invention;

[0034] Figure 4 This is a second schematic diagram of the test chamber structure of the present invention;

[0035] Figure 5 This is the third schematic diagram of the test chamber structure of the present invention;

[0036] Figure 6 This is the fourth schematic diagram of the test chamber structure of the present invention.

[0037] In the diagram, the markings are as follows: 1 is the fan; 2 is the mixing fan; 3 is the drive motor; 4 is the small pulley; 5 is the transmission belt; 6 is the first bearing housing; 7 is the large pulley; 8 is the second bearing housing; 9 is the first coupling; 10 is the torque and speed sensor; 11 is the second coupling; 12 is the thrust bearing; 13 is the friction disc; 14 is the non-metallic material sample block; 15 is the cover lock; 16 is the push rod; 17 is the pressure sensor; 18 is the cylinder; 19 is the test chamber; 20 is the igniter hole; and 21 is the temperature probe. 1. Wire lead-out hole; 22. Solenoid valve for cylinder; 23. Pressure relief port; 24. Air inlet nozzle; 25. Test bench; 26. Locking ring; 27. Protective plate; 28. Placement slot; 29. ​​Main spindle; 30. Top rod sleeve; 31. First mounting frame; 32. Second mounting frame; 33. Third mounting frame; 34. Flip cover; 35. First shaft mounting hole; 36. Sealed box; 37. Second shaft mounting hole; 38. Test nozzle; 39. Air vent nozzle; 40. Observation window; 41. Rod mounting hole. Detailed Implementation

[0038] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0039] Reference Figures 1 to 6 As shown in the figure, the friction spark testing device for non-metallic materials used in mining provided by this embodiment of the invention includes a main body of the testing device, an operating control console, and a gas supply source. The main body of the testing device is connected to the operating control console and the gas supply source respectively. The main body of the testing device includes a test platform 25, a test chamber 19, a rotary drive assembly, and a pneumatic clamping assembly. The rotary drive assembly, the test chamber 19, and the pneumatic clamping assembly are all mounted on the test platform 25. One end of the rotary drive assembly extends into the test chamber 19 and is rotatably connected to the test chamber 19. A friction disc 13 is fixedly connected to the end of the rotary drive assembly located inside the test chamber 19. One end of the pneumatic clamping assembly is fixedly connected to the test platform 25. The other end of the pneumatic clamping assembly is reciprocally connected to the test chamber 19 and is opposite to the friction disc 13. A non-metallic material sample block 14 is fixed on the opposite end of the pneumatic clamping assembly and the friction disc 13. The pneumatic clamping assembly is connected to the air supply source and the operation control console. The rotary drive assembly is connected to the operation control console. The mining non-metallic material friction spark test device also includes a methane detector, a temperature measuring device, and an igniter. The temperature measuring device and the igniter are both located inside the test chamber 19. The temperature measuring device and the igniter are both connected to the operation control console. The methane detector is connected to the inside of the test chamber 19. The methane detector is used to measure the concentration of the methane and air mixture in the test chamber 19 in real time.

[0040] The test bench 25 is equipped with a first mounting frame 31, a second mounting frame 32, and a third mounting frame 33, which are connected from top to bottom on the test bench 25. The rotary drive assembly includes a drive motor 3, a small pulley 4, a transmission belt 5, a large pulley 7, a first bearing housing 6, a second bearing housing 8, a first coupling 9, a torque and speed sensor 10, a second coupling 11, a thrust bearing 12, and a main shaft 29. The drive motor 3 is mounted on the third mounting frame. On the frame 33, the power output shaft of the drive motor 3 is connected to the small pulley 4; the first bearing seat 6, the large pulley 7, the second bearing seat 8, the first coupling 9, the torque and speed sensor 10, and the second coupling 11 are sequentially arranged on the first mounting frame 31 and connected together by the main shaft 29. The main shaft 29 is connected to the test chamber 19 by the thrust bearing 12, and the small pulley 4 and the large pulley 7 are connected by the transmission belt 5. One end of the pneumatic clamping assembly is fixedly installed on the top of the test bench 25 and is arranged opposite to the rotary drive assembly. The torque and speed sensor 10 can be used to detect the rotational speed and torque of the friction disc 13 and transmit them to the speed and torque digital display on the operation control console for display.

[0041] The test chamber 19 is fixedly installed on the second mounting frame 32. The test chamber 19 is provided with a first shaft mounting hole 35, a second shaft mounting hole 37, and a rod mounting hole 41. The second mounting frame 32 is also provided with a mixing fan 2. The power output shaft end of the mixing fan 2 passes through the second shaft mounting hole 37 into the test chamber 19 and is connected to a fan 1. A thrust bearing 12 is fixedly installed on the first shaft mounting hole 35. The two sides of the thrust bearing 12 are fixedly installed on the first shaft mounting hole 35 of the test chamber 19 by locking rings 26 and guard plates 27. The other end of the air pressure clamping assembly is connected to the rod mounting hole 41.

[0042] The pneumatic clamping assembly includes a cylinder 18, a pressure sensor 17, a push rod 16, and a push rod sleeve 30. The push rod sleeve 30 is fixedly connected to the rod mounting hole 41 inside the test chamber 19. The push rod 16 passes through the rod mounting hole 41 and the push rod sleeve 30 and can reciprocate within them. The cylinder 18 is fixedly connected to the top of the test bench 25. The pressure sensor 17 is connected between the cylinder 18 and the push rod 16. The push rod 16 is opposite to the friction disc 13. A placement groove 28 is opened on the opposite end of the push rod 16 and the friction disc 13. A non-metallic material sample block 14 is fixed in the placement groove 28. The pressure sensor 17 can be used to detect the pressure of the non-metallic material sample block 14 being pressed on the friction disc 13 and transmit it to the pressure digital display on the operation control panel for display.

[0043] The cylinder 18 is also connected to a cylinder solenoid valve 22, which is fixedly installed on the first mounting frame 31. The cylinder solenoid valve 22 is connected between the cylinder 18 and the air supply source. The cylinder solenoid valve 22 is also connected to the operation control console. The reciprocating motion of the cylinder 18 is controlled by the cylinder solenoid valve 22, thereby driving the push rod 16 to move.

[0044] The test chamber 19 includes a sealed chamber 36 and a flip cover 34. The flip cover 34 is sealed on the upper end of the sealed chamber 36. A temperature measuring device and an igniter are installed inside the sealed chamber 36. The temperature measuring device uses thermocouples, which are evenly distributed inside the sealed chamber 36. An igniter hole 20 and a temperature probe wire lead-out hole 21 are provided on the wall of the sealed chamber 36. The temperature probe wire connected to the thermocouple is led out of the sealed chamber 36 through the temperature probe wire lead-out hole 21 and electrically connected to the operation control panel. The ignition control wire connected to the igniter is led out of the sealed chamber 36 through the igniter hole 20 and electrically connected to the operation control panel.

[0045] The top of the sealed chamber 36 is open, and one end of the flip cover 34 is hinged to the top opening of the sealed chamber 36. The other end of the flip cover 34 is sealed to the sealed chamber 36 by the cover lock 15. The flip cover 34 is provided with a pressure relief port 23, which communicates with the inside of the test chamber 19. The pressure relief port 23 is covered and tied with a plastic film. The method of covering and tying the pressure relief port 23 with a plastic film is low in cost and highly replaceable.

[0046] The sealed chamber 36 is also equipped with an observation window 40, a detection nozzle 38, an air vent 39, and an air filling nozzle 24. The detection nozzle 38 is connected to a methane detector. The methane detector is connected to the interior of the test chamber 19 through the detection nozzle 38. The air vent 39 can be used to vent the gas inside the sealed chamber 36. The air filling nozzle 24 can be used to fill the empty sealed chamber 36 with gas. The observation window 40 allows for observation of the interior of the test chamber 19 at any time.

[0047] The operation console includes a control panel, a control housing, and an electrical control circuit. The electrical control circuit is located inside the control housing, and the control panel is located on the front of the control housing. The control panel is equipped with a digital temperature display, a digital speed and torque display, a digital pressure display, start and stop buttons for controlling the operation of the rotary drive assembly and the pneumatic pressing assembly, a control knob for controlling the rotation speed of the rotary drive assembly, start and stop buttons for controlling the operation of the mixing fan, and a start button for controlling the operation of the igniter. The electrical control circuit is a conventional circuit in the prior art and will not be described in detail here.

[0048] The present invention provides a method for testing friction sparks in non-metallic materials used in mining, comprising the following steps:

[0049] (1). Connect the operation console to the external power supply of the test device. The temperature digital display, speed and torque digital display, and pressure digital display on the operation console will all be lit up, indicating that the device is in working condition.

[0050] (2). Fix the non-metallic material sample block 14 in the placement groove 28 at the end of the top rod 16 inside the test chamber 19, close the flip cover 34 of the test chamber 19 and lock it with the cover lock 15, and cover and tie the pressure relief port 23 with a plastic film.

[0051] (3). The standard methane and air mixture is filled into the sealed chamber 36 of the test chamber 19 through the filling nozzle 24, and the concentration of the methane and air mixture in the sealed chamber 36 of the test chamber 19 is measured in real time through the detection nozzle 38 using a methane detector. The filling is stopped after the gas concentration reaches the required level.

[0052] (4). Press the start button on the control panel to control the operation of the mixing fan 2. The mixing fan 2 drives the fan 1 to run, so that the explosive mixed gas is evenly distributed in the sealed chamber 36 of the test chamber 19.

[0053] (5) Connect the cylinder 18 of the pneumatic pressing assembly to the air supply source, press the start button on the operation control panel to control the operation of the cylinder 18, the cylinder 18 drives the push rod 16 to press the non-metallic material sample block 14 onto the friction plate 13, control the cylinder solenoid valve 22 through the operation control panel, and adjust the pressure of the cylinder 18 on the friction plate 13 to achieve the design specific pressure required for the non-metallic material sample block 14 and keep this specific pressure constant.

[0054] (6). Press the start button on the control console to control the operation of the drive motor 3 of the rotary drive component, control the drive motor 3 to rotate and accelerate it by the scheduling knob, and after reaching the required number of revolutions of the non-metallic material sample block 14, the friction disk 13 stabilizes at the required number of revolutions;

[0055] (7). The temperature display on the control panel shows the temperature between the friction disk 13 and the non-metallic material sample block 14. When the temperature exceeds 150°C, press the stop button on the control panel to control the operation of the drive motor 3 of the rotation drive assembly, and the friction disk 13 will stop rotating.

[0056] (8). If the methane and air mixture in the sealed chamber 36 of the test chamber 19 is not ignited during the test, and the temperature of the friction disc 13 and the non-metallic material sample block 14 when they reach thermal equilibrium does not exceed 150°C, and it is necessary to manually ignite the methane and air mixture, press the start button on the control panel to start the igniter and ignite the mixture; after the explosion, the gas and flame will be discharged through the pressure relief port 23, and the test will end.

[0057] (9) During the test, record the dimensions of the non-metallic material sample block 14, the pressure on the non-metallic material sample block 14, the rotation speed of the friction disc 13, the highest temperature of the non-metallic material sample block 14, and the concentration of the test gas in the sealed chamber 36 of the test chamber 19 before and after the test.

[0058] (10) Calculate the wear amount and friction coefficient based on the thickness of the non-metallic material sample block 14 measured before and after the test.

[0059] The friction spark testing device for non-metallic materials in mining according to the present invention can achieve the following functions: In a sealed test chamber 19 filled with flammable and explosive gas, a non-metallic material sample block 14 is loaded onto a friction disc 13 at a designed specific pressure. The friction disc 13 rotates at a designed speed and remains constant. The test ends when the temperature rise between the non-metallic material sample block 14 and the friction disc 13 reaches thermal equilibrium. If the friction spark or high temperature ignites the flammable and explosive gas, the explosion pressure and flame will be released from the pressure relief port 23. If the flammable gas is not ignited during the test, it will be ignited and discharged by an igniter. Inside the sealed test chamber 19, thermocouples are arranged in a reasonable manner to achieve real-time temperature measurement between the non-metallic material sample block 14 and the friction disc 13. The rotation speed of the friction disc 13 is continuously adjustable by adjusting the speed control knob on the control panel. The specific pressure of the non-metallic material sample block 14 is applied by a cylinder 18 and continuously adjustable by a solenoid valve 22.

[0060] The flammable and explosive gas used in the test was a mixture of methane and air, with a methane concentration (volume ratio) of 6.3% to 7.0%, and the purity of the methane gas being greater than or equal to 99%.

[0061] Specifically, the working principle of the non-metallic material friction spark testing device of the present invention is as follows: The non-metallic material sample block 14 is fixedly installed in the placement groove 28 of the top rod 16 inside the sealed chamber 36 of the test chamber 19, and the flip cover 34 at the upper end of the sealed chamber 36 is locked. Standard methane gas is charged into the sealed chamber 36 through the charging nozzle 24. During charging, the methane concentration is continuously monitored using a methane detector. When the methane concentration reaches the specified concentration, charging into the sealed chamber 36 is stopped, and all charging nozzles 24 are closed. The mixing fan 2 is turned on, driving the fan 1 to operate, so that the explosive gas is evenly distributed within the sealed chamber 36. Connect cylinder 18 to the air supply source and press the start button on the control panel to operate cylinder 18. The push rod 16 presses the non-metallic material sample block 14 onto the friction disc 13. Adjust the air supply pressure to achieve the required design specific pressure for the sample and maintain this specific pressure. Press the start button on the control panel to operate the drive motor 3. The power output shaft of the drive motor 3 drives the small pulley 4 to rotate and accelerate. The small pulley 4 transmits the rotational motion to the large pulley 7 through the transmission belt 5, driving the main shaft 29 to rotate the friction disc 13 to the required number of revolutions for the non-metallic material sample block 14, and then stabilizes at the required number of revolutions. The thrust bearing 12 bears the clamping force transmitted by the push rod 16. At this time, the temperature measuring device collects the temperature between the non-metallic material sample block 14 and the friction disc 13 in real time. When the temperature exceeds 150°C, press the stop button on the control panel to stop the drive motor 3 of the rotation drive assembly, and the friction disc 13 stops rotating. If the flammable explosive gas is not ignited during the test, and the temperature of the non-metallic material sample block 14 when it reaches thermal equilibrium does not exceed 150°C, the flammable explosive gas must be manually ignited. Press the start button on the control panel to activate the igniter and detonate the flammable explosive gas inside the sealed chamber 36. After the explosion, the gas and flame will be discharged through the pressure relief port 23, and the test will end.

[0062] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of the present invention.

Claims

1. A non-metallic material friction spark testing device for mining, characterized by: The utility model provides a kind of mine non-metallic material friction spark test device, including test device main body, operation console and gas supply source, the test device main body is connected with operation console, gas supply source respectively;The test device main body includes test table, test box, rotating drive component and gas pressure compression component, rotating drive component, test box, gas pressure compression component are installed on test table, rotating drive component one end enters test box and can be rotatably connected between test box, rotating drive component end fixedly connected with friction disc in test box;Gas pressure compression component one end is fixedly connected on test table, the other end of gas pressure compression component is reciprocatingly movably connected in test box and opposite with friction disc, non-metallic material sample block is fixed on the opposite end of gas pressure compression component and friction disc, gas pressure compression component is connected with gas supply source, operation console respectively, rotating drive component is connected with operation console;The mine non-metallic material friction spark test device further includes methane determinator, temperature measuring device, igniter, temperature measuring device, igniter are arranged in test box;Temperature measuring device, igniter are connected with operation console, methane determinator is communicated with test box inside, methane determinator is used for real-time measurement of the concentration of methane and air mixture gas in test box; The test table is provided with first mounting rack, second mounting rack, third mounting rack, the first mounting rack, the second mounting rack, the third mounting rack are connected on the test table from top to bottom;The rotating drive component includes drive motor, small pulley, transmission belt, large pulley, first bearing seat, second bearing seat, first coupling, torque speed sensor, second coupling, thrust bearing, main shaft;Drive motor is arranged on the third mounting rack, and the power output shaft end of drive motor is connected with small pulley;First bearing seat, large pulley, second bearing seat, first coupling, torque speed sensor, second coupling are sequentially arranged on the first mounting rack and are connected together through main shaft, and the main shaft is connected between the test box through thrust bearing, and small pulley and large pulley are connected through transmission belt, and one end of gas pressure compression component is fixedly installed on the top of test table and is oppositely arranged with rotating drive component; The gas pressure compression component includes cylinder, pressure sensor, ejector rod and ejector rod sleeve, the ejector rod sleeve is fixedly connected to the position of the rod mounting hole inside the test box, the ejector rod is inserted into the rod mounting hole and the ejector rod sleeve and can reciprocate therein, the cylinder is fixedly connected to the top of the test table, the pressure sensor is connected between the cylinder and the ejector rod, the ejector rod is opposite to the friction disc, and a placing groove is formed in the opposite end of the ejector rod and the friction disc, and the non-metallic material sample block is fixed in the placing groove; The cylinder is further connected with cylinder solenoid valve, the cylinder solenoid valve is fixedly installed on the first mounting rack, the cylinder solenoid valve is connected between the cylinder and the gas supply source, and the cylinder solenoid valve is further connected with the operation console, the reciprocating motion of the cylinder is controlled through the cylinder solenoid valve, so as to drive the ejector rod to move. The operation console comprises a control panel, a control box body and an electrical control circuit, the electrical control circuit is arranged inside the control box body, and the control panel is arranged on the front side of the control box body; a temperature digital display meter, a rotating speed and torque digital display meter and a pressure digital display meter are arranged on the control panel.

2. A device for testing non-metallic materials for frictional sparking in a mine as claimed in claim 1, characterised in that: The test box is fixedly installed on the second mounting rack, the test box is provided with a first shaft mounting hole, a second shaft mounting hole and a rod mounting hole, the second mounting rack is further provided with a mixed fan, a power output shaft end of the mixed fan passes through the second shaft mounting hole into the test box and is connected with a fan, a thrust bearing is fixedly installed on the first shaft mounting hole, the thrust bearing is fixedly installed on the first shaft mounting hole of the test box through locking rings and guard plates on both sides of the thrust bearing, and the other end of the air pressure pressing assembly is connected to the rod mounting hole.

3. A device for testing non-metallic materials for frictional sparking in a mine as claimed in claim 2, characterised in that: The test box comprises a sealed box body and a flip cover, the flip cover sealing cover is arranged on the upper end of the sealed box body, a temperature measuring device and an igniter are arranged inside the sealed box body, the temperature measuring device adopts a thermocouple, the thermocouples are uniformly arranged in the sealed box body, an igniter hole and a temperature measuring probe line leading-out hole are formed in the wall of the sealed box body, the temperature measuring probe line connected to the thermocouples is led out of the sealed box body through the temperature measuring probe line leading-out hole and is electrically connected to the operation console, and the ignition control line connected to the igniter is led out of the sealed box body through the igniter hole and is electrically connected to the operation console.

4. A device for testing non-metallic materials for frictional sparking in a mine as claimed in claim 3, characterised in that: The top of the sealed box body is an opening, one end of the flip cover is hinged to the top opening of the sealed box body, the other end of the flip cover is sealingly connected to the sealed box body through a cover lock, a pressure relief port is arranged on the flip cover, the pressure relief port communicates with the inside of the test box, and the pressure relief port is covered with a plastic film and is tightly tied.

5. A device for testing non-metallic materials for frictional sparking in mines as claimed in claim 3, wherein: The wall of the sealed box body is further provided with an observation window, a detection air nozzle, an air exhaust nozzle and an air filling nozzle, and the detection air nozzle is connected to a methane detector.

6. A device for testing non-metallic materials for frictional sparking in mines as claimed in claim 1, wherein: The control panel is further provided with start and stop buttons for respectively controlling the work of the rotary driving assembly and the air pressure pressing assembly, a scheduling knob for controlling the rotating speed of the rotary driving assembly, start and stop buttons for controlling the work of the mixed fan, and start and stop buttons for controlling the work of the igniter.

7. A method of testing non-metallic materials for frictional sparking in mining, characterized by: The method comprises the following steps: (1) connect the operation console to the power supply of the test device main body, the temperature digital display meter, the rotating speed and torque digital display meter and the pressure digital display meter on the operation console are lighted, and the operation console enters a working state; (2) fix the non-metal material sample block in the placing groove at the top rod end of the test box, close the flip cover of the test box and tightly seal the flip cover with the cover lock, cover the plastic film on the pressure relief port and tightly tie the plastic film; (3) fill the standard methane and air mixed gas into the sealed box body of the test box through the air filling nozzle, and use the methane detector to measure the concentration of the methane and air mixed gas in the sealed box body of the test box in real time through the detection air nozzle, stop filling the gas after the gas concentration reaches the requirement; (4) press the start button of the mixed fan on the operation console, the mixed fan drives the fan to rotate, and the mixed gas with explosiveness is uniformly distributed in the sealed box body of the test box. (5) Connect the cylinder of the pneumatic pressing assembly to the air supply, press the start button on the operation console to control the cylinder, the cylinder drives the ejector rod to press the non-metallic material sample block on the friction disc, control the cylinder with the electromagnetic valve, adjust the pressure of the cylinder on the friction disc with the electromagnetic valve, to achieve the required design pressure of the non-metallic material sample block, and keep the pressure unchanged; (6) Press the start button on the operation console to control the driving motor of the rotating drive assembly, control the driving motor to rotate and accelerate by the speed knob, and when the non-metallic material sample block reaches the required number of revolutions, the friction disc stabilizes at the required number of revolutions; (7) The temperature digital display on the operation console displays the temperature between the friction disc and the non-metallic material sample block, when the temperature exceeds 150℃, press the stop button on the operation console to control the driving motor of the rotating drive assembly, the friction disc stops rotating; (8) If the methane and air mixture gas in the sealed box of the test box is not detonated during the test, and the temperature of the friction disc and the non-metallic material sample block when the heat balance state is reached also does not exceed 150℃, manual detonation of the methane and air mixture gas is required, press the start button on the operation console to control the ignition device, start the ignition device, and detonate the mixture gas; After the explosion, the gas and flame will be discharged through the pressure relief port, and the test is completed; (9) During the test, record the size of the non-metallic material sample block, the pressure on the non-metallic material sample block, the rotation speed of the friction disc, the highest temperature of the non-metallic material sample block, and the concentration of the test gas in the sealed box of the test box before and after the test; (10) According to the thickness of the non-metallic material sample block before and after the test, calculate the wear amount and the friction coefficient.

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