A coal sample tank and method for online testing of coal spontaneous combustion tendency characteristics

Abstract

The present invention relates to a coal sample tank for online testing of coal spontaneous combustion tendency characteristics, including a bearing frame, a bearing tank, a sealing cover, a rotating mechanism, a guide column, a bearing arm, a test tank and a driving circuit. The bearing tank is embedded in the bearing frame, the upper end surface is connected to the sealing cover, the rotating mechanism is connected to the bottom of the bearing tank, the lower end surface of the guide column is connected to the bottom of the bearing tank through the rotating mechanism, the outer side surface of the test tank is connected to the outer side surface of the guide column through the bearing arm, and the driving circuit is embedded in the outer surface of the bearing frame. The detection method includes four steps: equipment prefabrication, coal sample debugging, test operation and detection reset. On the one hand, the present invention can effectively meet the needs of coal sample detection operations of different structural types, and greatly improve the remote control capability and remote data acquisition capability of the detection operation; on the other hand, it can simultaneously realize the test operation of multiple different coal samples under different detection conditions, greatly improving the efficiency of the detection operation and reducing the operating cost of the detection operation.

Description

Technical Field

[0001] The invention relates to a coal sample spontaneous combustion characteristic testing device, in particular to a coal sample tank and a testing method for online coal spontaneous combustion tendency characteristic testing. Background Art

[0002] The determination of coal oxidation characteristics is an important factor in ensuring the safety of coal mine production and restricting the smooth development of coal mine production capacity and working face. In response to this problem, various types of coal sample spontaneous combustion characteristics detection devices and corresponding detection methods have been developed, such as the patent application number "2004100414272" "A kind of adiabatic test method and device for simulating the spontaneous combustion process of coal" and the patent application number "201610268808.7 Although the patented technologies such as "Test Method for the Influence of Space and Multi-component Gas on Spontaneous Combustion Tendency of Coal" can meet the needs of coal sample characteristic detection operations to a certain extent, in use, on the one hand, the equipment system structure is complex to varying degrees, the operation is cumbersome and difficult, and during the detection operation, it is impossible to meet the needs of multiple types of coal sample detection operations at the same time, which leads to the low efficiency of the current detection operation. At the same time, when the current detection equipment is in operation, when performing the detection data output operation, the data output is performed through manual recording, ordinary industrial computers, PC computers and printers, which makes it impossible to remotely obtain the detection data and remotely control the coal sample detection operation throughout the process, which seriously affects the flexibility and convenience of the detection operation.

[0003] Therefore, in view of this situation, it is urgent to develop a special equipment for testing the spontaneous combustion characteristics of coal samples and a corresponding detection method to meet the needs of practical use. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a coal sample spontaneous combustion characteristics testing device and an applicable method to overcome the above defects and meet the needs of actual testing operations.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A coal sample tank for online testing of coal spontaneous combustion tendency characteristics comprises a bearing frame, a bearing tank, a sealing cover, a rotating mechanism, a guide column, a bearing arm, a test tank, a temperature sensor, a pressure sensor and a driving circuit. The bearing frame is a frame structure whose axis is vertically distributed with a horizontal plane. The bearing tank is embedded in the bearing frame and coaxially distributed with the bearing frame. The upper end face of the bearing tank is connected with the sealing cover and forms a closed cavity structure. The sealing cover and the lower end face of the bearing tank are both provided with at least a guide port and a plurality of through holes. The rotating mechanism is embedded in the bearing tank, connected with the bottom of the bearing tank and coaxially distributed. The guide column is coaxially distributed with the bearing tank, and the lower end face is connected with the bottom of the bearing tank through the rotating mechanism. The upper end face is 0-10 cm lower than the lower end face of the sealing cover. There are at least two test tanks, which are embedded in the bearing tank and uniformly distributed around the axis of the guide column. The axis of the test tank is parallel to the axis of the bearing tank, and the outer side of the test tank is connected with the outer side of the guide column through at least one bearing arm. The test tank comprises a tank body, a pressure-bearing movable The tank body is a cylindrical hollow tubular cavity structure. The pressure-bearing piston is embedded in the tank body and coaxially distributed with the tank body. The lower end face of the pressure-bearing piston is connected to the lifting drive mechanism. The lifting drive mechanism is embedded in the tank body and parallel to the axis of the tank body. The lifting drive mechanism is connected to the inner surface of the tank body. The upper and lower end faces of the tank body are both provided with drainage ports. The pressure-bearing piston is provided with air vents. The drainage ports and the air vents are coaxially distributed. The drainage ports on the upper and lower end faces of the tank body are respectively connected with the through holes on the bearing tank and the sealing cover through the guide pipe. A number of temperature sensors are respectively embedded in the bearing tank and each test tank. The number of pressure sensors is consistent with the number of test tanks. At least one pressure sensor is arranged in each test tank. The pressure sensor is embedded in the connection position between the pressure-bearing piston and the lifting drive mechanism and coaxially distributed with the lifting drive mechanism. The driving circuit is embedded in the outer surface of the bearing frame and is electrically connected to the rotary mechanism, the temperature sensor and the pressure sensor respectively.

[0007] Furthermore, the inner surface of the carrying frame is slidably connected to the outer surface of the carrying tank by at least two slide rails, the slide rails are evenly distributed around the axis of the carrying frame and parallel to the axis of the carrying frame, and two turntable mechanisms are provided on the outer surface of the carrying frame, the turntable mechanisms are symmetrically distributed on both sides of the carrying tank, and the turntable mechanisms are perpendicular to and intersect with the axis of the carrying tank, and the turntable mechanisms are also electrically connected to the drive circuit.

[0008] Furthermore, the carrying tank is provided with at least one carrying chute coaxially distributed with the carrying tank, and the carrying chute is provided with a plurality of sliders, the front end surface of the slider is connected to the outer surface of the test tank, and the rear end surface of the slider is embedded in the carrying chute and slidably connected to the carrying chute.

[0009] Furthermore, the bearing arm is a telescopic rod structure with at least two stages, and its rear end face is slidably connected to the outer surface of the guide column through a connecting slide groove, the connecting slide groove is distributed parallel to the axis of the guide column and is evenly distributed around the axis of the guide column, and the front end face of the bearing arm is connected to the positioning clamp through a turntable mechanism, and the positioning clamp is covered on the outside of the test tank and is coaxially distributed with the test tank.

[0010] Furthermore, the tank body includes a bearing cavity, a ballast cover, a heat dissipation fin, an elastic pad, and a guide rail. The bearing cavity is a hollow cylindrical tubular structure, and its upper and lower end surfaces are connected to the ballast cover to form a closed cavity structure. The ballast cover is provided with a drainage air port coaxially distributed with the bearing cavity. There are a number of heat dissipation fins connected to the outer surface of the bearing cavity and evenly distributed around the axis of the bearing cavity. The heat dissipation fins are at an angle of 0°-90° to the axis of the bearing tank, and the total outer surface area of ​​the heat dissipation fins is 1.5-3 times the outer surface area of ​​the bearing cavity. The guide rail is embedded in the bottom of the bearing tank and is a ring structure coaxially distributed with the bearing tank. There is at least one elastic pad on the ballast cover on the lower end surface of the bearing cavity, and it is slidably connected to the guide rail through the elastic pad. The distance between the guide rail and the sealing cover of the lower end surface of the bearing cavity is not less than 10 cm.

[0011] Furthermore, the driving circuit is a circuit system based on a programmable controller, and the driving circuit is further provided with at least one serial communication terminal.

[0012] A method for testing a coal sample tank for online testing of coal spontaneous combustion tendency characteristics comprises the following steps:

[0013] S1, equipment prefabrication, first assemble the bearing frame, bearing tank, sealing cover, slewing mechanism, guide column, bearing arm, test tank, temperature sensor, pressure sensor and driving circuit constituting the present invention, then connect the assembled present invention with the testing equipment through the turntable mechanism outside the bearing frame, and adjust the vertical distribution of the main line of the bearing frame with the horizontal plane through the turntable mechanism, then connect the bearing tank with the external heat bath system through the guide port, connect each coal sample tank with the high-pressure gas source and gas phase analyzer of the testing equipment, and finally electrically connect the driving circuit with the main control circuit of the detection equipment to complete the assembly of the present invention;

[0014] S2, coal sample debugging, after completing step S1, firstly, according to the needs of the detection operation, prepare several coal samples of structural volume, and uniformly compile identification codes for the prepared coal samples, then prepare an experimental data collection table for the coal samples according to the identification codes, and formulate a detection operation process plan for each coal sample in the data collection table, and then adjust the number of test tanks in the carrier tank and the structural volume of the test tank according to the structural type of the coal sample, and then fill the coal sample into the corresponding test tank, set the corresponding identification number for the detection cavity according to the embedded coal sample number, and enter the identification number of the detection cavity into the experimental data collection table in S1 and match it with the coal sample identification code, and then seal each test tank and the carrier tank in turn;

[0015] S3, test operation, after completing step S2, firstly, high temperature medium is introduced into the carrying tank through the external heat bath system box, and each test tank in the carrying tank is heated by the high temperature medium, and when heated to the detection operation process plan requirement set in step S2, the lifting drive mechanism in each test tank is driven to operate, and the lifting drive mechanism drives the pressure-bearing piston to pressurize the coal sample, and when the pressure of the pressurized coal sample reaches the detection operation process plan requirement set in step S2, the gas of the high-pressure gas source of the test equipment is pressure-regulated and transported to each test tank respectively, and the gas is made to flow from top to bottom along the axis of the test tank, and finally discharged from the bottom of the test tank and transported to the gas analyzer for analysis, and the test operation is completed;

[0016] S4, detection reset, after completing the detection operation of step S3, first cool down and reduce the pressure of each test tank, so that the detection chamber returns to normal temperature and pressure, then open each test tank and take out the tested coal sample, and clean the inside of the test tank. After completing the cleaning operation, return to step S2 for subsequent operations until all coal sample detection operations are completed.

[0017] Furthermore, the external heat bath system is any one of a water bath, an oil bath and a steam bath.

[0018] Furthermore, the coal sample in step S2 is any one of a coal pillar directly collected from a coal seam by a sampling device and a coal pillar prepared by pressing coal particles with a particle size of 0.1-50 mm.

[0019] The present invention has a high degree of integration and operation automation, is simple and flexible to operate, and can effectively improve the efficiency and detection accuracy of coal sample detection operations. On the one hand, it can effectively meet the needs of coal sample detection operations of different structural types, and greatly improve the remote control capability and remote data acquisition capability of the detection operation, thereby improving the versatility and convenience of the operation of the present invention; on the other hand, it can simultaneously realize testing operations on multiple different coal samples under different detection conditions, thereby greatly improving the efficiency of the detection operation and reducing the operating cost of the detection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

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

[0022] Figure 2 It is a schematic diagram of the partial structure of the tank body;

[0023] Figure 3 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] like Figure 1 and 2 As shown, a coal sample tank for online coal spontaneous combustion tendency characteristic test comprises a bearing frame 1, a bearing tank 2, a sealing cover 3, a slewing mechanism 4, a guide column 5, a bearing arm 6, a test tank 7, a temperature sensor 8, a pressure sensor 9 and a driving circuit 10. The bearing frame 1 is a frame structure with an axis vertically distributed to a horizontal plane. The bearing tank 2 is embedded in the bearing frame 1 and coaxially distributed with the bearing frame 1. The upper end surface of the bearing tank 2 is connected to the sealing cover 3 to form a closed cavity structure. The sealing cover 3 and the lower end surface of the bearing tank 2 are both provided with at least A guide port 11 and a plurality of through holes 12, a rotating mechanism 4 is embedded in the carrying tank 2, connected to the bottom of the carrying tank 2 and coaxially distributed, a guide column 5 is coaxially distributed with the carrying tank 2, a lower end surface is connected to the bottom of the carrying tank 2 through the rotating mechanism 4, and an upper end surface is 0-10 cm lower than the lower end surface of the sealing cover 3, at least two test tanks 7 are embedded in the carrying tank 2 and evenly distributed around the axis of the guide column 5, the axis of the test tank 7 is parallel to the axis of the carrying tank 2, and the outer side surface of the test tank 7 is connected to the outer side surface of the guide column 5 through at least one carrying arm 6.

[0026] In this embodiment, the test tank 7 includes a tank body 71, a pressure-bearing piston 72, and a lifting drive mechanism 73. The tank body 71 is a cylindrical hollow tubular cavity structure. The pressure-bearing piston 72 is embedded in the tank body 71 and is coaxially distributed with the tank body 71. The lower end surface of the pressure-bearing piston 72 is connected to the lifting drive mechanism 73. The lifting drive mechanism 73 is embedded in the tank body 71 and is distributed parallel to the axis of the tank body 71. The lifting drive mechanism 73 is connected to the inner surface of the tank body 71. The upper and lower end surfaces of the tank body 71 are both provided with drainage ports 74. The pressure-bearing piston 72 is provided with air vents 75. The drainage ports 74 and the air vents 75 are coaxially distributed. The drainage air ports 74 on the upper and lower end surfaces of the tank body 71 are connected to the through holes 12 on the carrier tank 2 and the sealing cover 3 through the guide pipes, respectively. A number of temperature sensors 8 are respectively embedded in the carrier tank 2 and each test tank 7. The number of pressure sensors 9 is consistent with the number of test tanks 7. At least one pressure sensor 9 is provided in each test tank 7. The pressure sensor 9 is embedded in the connection position between the pressure-bearing piston 72 and the lifting drive mechanism 73, and is coaxially distributed with the lifting drive mechanism 73. The drive circuit 10 is embedded in the outer surface of the carrier frame 1, and is electrically connected to the rotary mechanism 4, the temperature sensor 8, and the pressure sensor 9, respectively.

[0027] In this embodiment, the inner surface of the carrying frame 1 is slidably connected to the outer surface of the carrying tank 2 through at least two slide rails 13, and the slide rails 13 are evenly distributed around the axis of the carrying frame 1 and are distributed parallel to the axis of the carrying frame 1. Two turntable mechanisms 14 are provided on the outer surface of the carrying frame 1, and the turntable mechanisms 14 are symmetrically distributed on both sides of the carrying tank 2, and the turntable mechanisms 14 are perpendicular to and intersect with the axis of the carrying tank 2, and the turntable mechanisms 14 are also electrically connected to the drive circuit 10.

[0028] For further optimization, the carrying tank 2 is provided with at least one carrying chute 15 coaxially distributed with the carrying tank 2, and the carrying chute 15 is provided with a plurality of sliders 16, the front end surface of the slider 16 is connected to the outer surface of the test tank 7, and the rear end surface of the slider 16 is embedded in the carrying chute 15 and is slidably connected to the carrying chute 15.

[0029] At the same time, the carrying arm 6 is a telescopic rod structure of at least two stages, and its rear end face is slidably connected to the outer surface of the guide column 5 through a connecting slide groove 17. The connecting slide groove 17 is distributed parallel to the axis of the guide column 5 and is evenly distributed around the axis of the guide column 5. The front end face of the carrying arm 6 is connected to the positioning clamp 18 through a turntable mechanism 14. The positioning clamp 18 is covered on the outside of the test tank 7 and is coaxially distributed with the test tank 7.

[0030] It is worth noting that the tank body 71 includes a bearing cavity 701, a ballast cover 702, a heat dissipation fin plate 703, an elastic pad 704, and a guide rail 705. The bearing cavity 701 is a hollow cylindrical tubular structure, and its upper end face and lower end face are connected to the ballast cover 702 to form a closed cavity structure. The ballast cover 702 is provided with a drainage air port 74 coaxially distributed with the bearing cavity 701. The heat dissipation fin plates 703 are connected to the outer surface of the bearing cavity 701 and are uniformly distributed around the axis of the bearing cavity 701. 3 forms an angle of 0°-90° with the axis of the carrying tank 2, and the total outer surface area of ​​the heat dissipating fin plate 703 is 1.5-3 times the outer surface area of ​​the carrying cavity 701. The guide rail 705 is embedded in the bottom of the carrying tank 2 and is a ring-mounted structure coaxially distributed with the carrying tank 2. There is at least one elastic pad 704 on the ballast cover 702 on the lower end surface of the carrying cavity 701, and is slidably connected to the guide rail 705 through the elastic pad 704. The distance between the guide rail 705 and the sealing cover on the lower end surface of the carrying cavity 701 is not less than 10 cm.

[0031] In this embodiment, the driving circuit 10 is a circuit system based on a programmable controller, and the driving circuit is further provided with at least one serial communication terminal.

[0032] like Figure 3 As shown, a method for testing a coal sample tank for online testing of coal spontaneous combustion tendency characteristics comprises the following steps:

[0033] S1, equipment prefabrication, first assemble the bearing frame, bearing tank, sealing cover, slewing mechanism, guide column, bearing arm, test tank, temperature sensor, pressure sensor and driving circuit constituting the present invention, then connect the assembled present invention with the testing equipment through the turntable mechanism outside the bearing frame, and adjust the vertical distribution of the main line of the bearing frame with the horizontal plane through the turntable mechanism, then connect the bearing tank with the external heat bath system through the guide port, connect each coal sample tank with the high-pressure gas source and gas phase analyzer of the testing equipment, and finally electrically connect the driving circuit with the main control circuit of the detection equipment to complete the assembly of the present invention;

[0034] S2, coal sample debugging, after completing step S1, firstly, according to the needs of the detection operation, prepare several coal samples of structural volume, and uniformly compile identification codes for the prepared coal samples, then prepare an experimental data collection table for the coal samples according to the identification codes, and formulate a detection operation process plan for each coal sample in the data collection table, and then adjust the number of test tanks in the carrier tank and the structural volume of the test tank according to the structural type of the coal sample, and then fill the coal sample into the corresponding test tank, set the corresponding identification number for the detection cavity according to the embedded coal sample number, and enter the identification number of the detection cavity into the experimental data collection table in S1 and match it with the coal sample identification code, and then seal each test tank and the carrier tank in turn;

[0035] S3, test operation, after completing step S2, firstly, high temperature medium is introduced into the carrying tank through the external heat bath system box, and each test tank in the carrying tank is heated by the high temperature medium, and when heated to the detection operation process plan requirement set in step S2, the lifting drive mechanism in each test tank is driven to operate, and the lifting drive mechanism drives the pressure-bearing piston to pressurize the coal sample, and when the pressure of the pressurized coal sample reaches the detection operation process plan requirement set in step S2, the gas of the high-pressure gas source of the test equipment is pressure-regulated and transported to each test tank respectively, and the gas is made to flow from top to bottom along the axis of the test tank, and finally discharged from the bottom of the test tank and transported to the gas analyzer for analysis, and the test operation is completed;

[0036] S4, detection reset, after completing the detection operation of step S3, first cool down and reduce the pressure of each test tank, so that the detection chamber returns to normal temperature and pressure, then open each test tank and take out the tested coal sample, and clean the inside of the test tank. After completing the cleaning operation, return to step S2 for subsequent operations until all coal sample detection operations are completed.

[0037] Wherein, the external heat bath system is any one of a water bath, an oil bath and a steam bath.

[0038] Meanwhile, the coal sample in step S2 is any one of a coal pillar directly collected from a coal seam by a sampling device and a coal pillar prepared by pressing coal particles with a particle size of 0.1-50 mm.

[0039] The present invention has a high degree of integration and operation automation, is simple and flexible to operate, and can effectively improve the efficiency and detection accuracy of coal sample detection operations. On the one hand, it can effectively meet the needs of coal sample detection operations of different structural types, and greatly improve the remote control capability and remote data acquisition capability of the detection operation, thereby improving the versatility and convenience of the operation of the present invention; on the other hand, it can simultaneously realize testing operations on multiple different coal samples under different detection conditions, thereby greatly improving the efficiency of the detection operation and reducing the operating cost of the detection operation.

[0040] It should be understood by those skilled in the art that the present invention is not limited by the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal sample tank for online testing of coal spontaneous combustion tendency characteristics, characterized by: The coal sample tank for online coal spontaneous combustion tendency characteristic test includes a bearing frame, a bearing tank, a sealing cover, a rotating mechanism, a guide column, a bearing arm, a test tank, a temperature sensor, a pressure sensor and a driving circuit. The bearing frame is a frame structure with an axis vertically distributed to a horizontal plane. The bearing tank is embedded in the bearing frame and coaxially distributed with the bearing frame. The upper end face of the bearing tank is connected to the sealing cover and forms a closed cavity structure. The sealing cover and the lower end face of the bearing tank are both provided with at least a guide port and a plurality of through holes. The rotating mechanism is embedded in the bearing tank, connected to the bottom of the bearing tank and coaxially distributed. The guide column is coaxially distributed with the bearing tank, and the lower end face is connected to the bottom of the bearing tank through the rotating mechanism. The upper end face is 0-10 cm lower than the lower end face of the sealing cover. There are at least two test tanks, which are embedded in the bearing tank and evenly distributed around the axis of the guide column. The axis of the test tank is parallel to the axis of the bearing tank, and the outer side of the test tank is connected to the outer side of the guide column through at least one bearing arm. The test tank includes a tank body, a pressure-bearing piston , a lifting drive mechanism, the tank body is a cylindrical hollow tubular cavity structure, the pressure-bearing piston is embedded in the tank body, coaxially distributed with the tank body, and the lower end surface of the pressure-bearing piston is connected to the lifting drive mechanism, the lifting drive mechanism is embedded in the tank body and distributed parallel to the axis of the tank body, and the lifting drive mechanism is connected to the inner surface of the tank body, the upper end surface and the lower end surface of the tank body are both provided with drainage ports, and the pressure-bearing piston is provided with air holes, the drainage ports and the air holes are coaxially distributed, and the drainage ports on the upper end surface and the lower end surface of the tank body are respectively connected with the through holes on the bearing tank and the sealing cover through the guide pipe, a plurality of temperature sensors are respectively embedded in the bearing tank and each test tank, the number of the pressure sensors is consistent with the number of the test tanks, and at least one pressure sensor is arranged in each test tank, the pressure sensor is embedded at the connection position between the pressure-bearing piston and the lifting drive mechanism, and coaxially distributed with the lifting drive mechanism, the driving circuit is embedded in the outer surface of the bearing frame, and is respectively electrically connected to the rotary mechanism, the temperature sensor, and the pressure sensor; The inner surface of the carrying frame is slidably connected to the outer surface of the carrying tank through at least two slide rails, the slide rails are evenly distributed around the axis of the carrying frame and are distributed parallel to the axis of the carrying frame, and the outer surface of the carrying frame is provided with two turntable mechanisms, the turntable mechanisms are symmetrically distributed on both sides of the carrying tank, and the turntable mechanisms are perpendicular to and intersect the axis of the carrying tank, and the turntable mechanisms are also electrically connected to the driving circuit; At least one load-bearing chute coaxially distributed with the load-bearing tank is provided in the load-bearing chute, and a plurality of sliders are provided in the load-bearing chute, the front end surface of the slider is connected to the outer surface of the test tank, and the rear end surface of the slider is embedded in the load-bearing chute and slidably connected to the load-bearing chute; The bearing arm is a telescopic rod structure of at least two stages, and its rear end face is slidably connected to the outer surface of the guide column through a connecting slide groove, and the connecting slide groove is parallel to the axis of the guide column and evenly distributed around the axis of the guide column. The front end face of the bearing arm is connected to the positioning clamp through a turntable mechanism, and the positioning clamp is covered outside the test tank and is coaxially distributed with the test tank.

2. The coal sample tank for online testing of coal spontaneous combustion tendency characteristics according to claim 1, characterized in that: The tank body includes a bearing cavity, a ballast cover, a heat dissipation fin, an elastic pad, and a guide rail. The bearing cavity is a hollow cylindrical tubular structure, and its upper end face and lower end face are connected to the ballast cover to form a closed cavity structure. The ballast cover is provided with a drainage air port coaxially distributed with the bearing cavity. There are several heat dissipation fins connected to the outer surface of the bearing cavity and evenly distributed around the axis of the bearing cavity. The heat dissipation fins are at an angle of 0°-90° with the axis of the bearing tank, and the total outer surface area of ​​the heat dissipation fins is 1.5-3 times the outer surface area of ​​the bearing cavity. The guide rail is embedded in the bottom of the bearing tank and is a ring structure coaxially distributed with the bearing tank. There is at least one elastic pad on the ballast cover on the lower end face of the bearing cavity, and it is slidably connected to the guide rail through the elastic pad. The distance between the guide rail and the sealing cover of the lower end face of the bearing cavity is not less than 10 cm.

3. The coal sample tank for online testing of coal spontaneous combustion tendency characteristics according to claim 1, characterized in that: The driving circuit is a circuit system based on a programmable controller, and the driving circuit is further provided with at least one serial communication terminal.

4. The method for testing a coal sample tank for online testing of coal spontaneous combustion tendency characteristics according to claim 1, characterized in that: The testing method of the coal sample tank for online coal spontaneous combustion tendency characteristic testing comprises the following steps: S1, equipment prefabrication, first assemble the support frame, support tank, sealing cover, slewing mechanism, guide column, support arm, test tank, temperature sensor, pressure sensor and driving circuit that constitute the test coal sample tank, then connect the assembled test coal sample tank to the test equipment through the turntable mechanism outside the support frame, and adjust the vertical distribution of the main line of the support frame to the horizontal plane through the turntable mechanism, then connect the support tank to the external heat bath system through the guide port, connect each coal sample tank to the high-pressure gas source and gas phase analyzer of the test equipment, and finally electrically connect the driving circuit to the main control circuit of the detection equipment to complete the assembly of the test coal sample tank; S2, coal sample debugging, after completing step S1, firstly, according to the needs of the detection operation, prepare several coal samples of structural volume, and uniformly compile identification codes for the prepared coal samples, then prepare an experimental data collection table for the coal samples according to the identification codes, and formulate a detection operation process plan for each coal sample in the data collection table, and then adjust the number of test tanks in the carrier tank and the structural volume of the test tank according to the structural type of the coal sample, and then fill the coal sample into the corresponding test tank, set the corresponding identification number for the detection cavity according to the embedded coal sample number, and enter the identification number of the detection cavity into the experimental data collection table in S1 and match it with the coal sample identification code, and then seal each test tank and the carrier tank in turn; S3, test operation, after completing step S2, firstly, high temperature medium is introduced into the carrying tank through the external heat bath system box, and each test tank in the carrying tank is heated by the high temperature medium, and when heated to the detection operation process plan requirement set in step S2, the lifting drive mechanism in each test tank is driven to operate, and the lifting drive mechanism drives the pressure-bearing piston to pressurize the coal sample, and when the pressure of the pressurized coal sample reaches the detection operation process plan requirement set in step S2, the gas of the high-pressure gas source of the test equipment is pressure-regulated and transported to each test tank respectively, and the gas is made to flow from top to bottom along the axis of the test tank, and finally discharged from the bottom of the test tank and transported to the gas analyzer for analysis, and the test operation is completed; S4, detection reset, after completing the detection operation of step S3, first cool down and reduce the pressure of each test tank, so that the detection chamber returns to normal temperature and pressure, then open each test tank and take out the tested coal sample, and clean the inside of the test tank. After completing the cleaning operation, return to step S2 for subsequent operations until all coal sample detection operations are completed.

5. The method for testing a coal sample tank for online testing of coal spontaneous combustion tendency characteristics according to claim 4, characterized in that: The external heat bath system is any one of a water bath, an oil bath and a steam bath.

6. The method for testing a coal sample tank for online testing of coal spontaneous combustion tendency characteristics according to claim 4, characterized in that: The coal sample in step S2 is any one of a coal pillar directly collected from a coal seam by a sampling device and a coal pillar prepared by pressing coal particles with a particle size of 0.1-50 mm.

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