Coal rock sample sampling and detecting device

Abstract

The utility model discloses a coal rock sample sampling and detecting device which comprises a mounting box, a vacuum pump, a rechargeable battery and a PLC (programmable logic controller) are arranged in the mounting box, a box cover is arranged at the top of the mounting box, and a sampling tank top pressure driving feeder, a crushing mechanism and a lifting rotary grinding mechanism are sequentially arranged in the mounting box from top to bottom. The lifting rotary type grinding mechanism is connected with a gas collection detection device through a gas collection pipe, and the PLC is in control connection with the vacuum pump, the smashing mechanism and the lifting rotary type grinding mechanism through signal lines. The device is scientific in principle and easy to operate, gas production components and proportions in the crushing and grinding processes of samples are detected on site, on one hand, a new thought can be provided for understanding the action of tectonic stress in the coalification process, and a perfect coalification action theory is established; on the other hand, a gas production source and a gas production mechanism in the tectonic coal deformation process are disclosed, and a scientific basis is provided for geological prospecting, coal mine excess gas source research and coal and gas outburst prevention and control.

Description

Technical Field

[0001] This utility model belongs to the field of coal and rock sample sampling and testing technology, specifically relating to a coal and rock sample sampling and testing device. Background Technology

[0002] Currently, the common method for sampling and testing coal or rock underground is to use sampling containers to collect the samples and then take them to a laboratory above ground for testing. This sampling and testing method has the following disadvantages and limitations:

[0003] (1) The sampling tank takes a long time to travel from the mine to the laboratory, and many sampling tanks are not properly sealed. In particular, for coal samples, the gas in the coal samples may be lost during long-term transportation, which will affect the accuracy of the test results.

[0004] (2) At present, the detection of coal samples is usually carried out by gas desorption test. Gas desorption can effectively predict and control the risk of gas release through accurate measurement and analysis of desorption law. It is of great value for coal mine safety and coalbed methane development. However, this detection method cannot be used to detect rock samples. Utility Model Content

[0005] In order to solve the above-mentioned technical problems in the prior art, this utility model provides a coal and rock sample sampling and testing device that is easy to operate, has high accuracy in detection results, and can detect both coal and rock samples.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a coal and rock sample sampling and testing device, comprising a horizontally arranged base plate, a traveling wheel at the bottom of the base plate, a mounting box on the base plate, a vacuum pump, a rechargeable battery and a PLC controller inside the mounting box, the vacuum pump outlet connected to the outside of the mounting box, a feeding port at the top of the mounting box, a box cover at the feeding port, and, from top to bottom, a sampling tank top pressure drive feeder, a crushing mechanism and a lifting and rotating grinding mechanism inside the mounting box, wherein the lifting and rotating grinding mechanism is connected to a gas collection and detection device through a gas collection pipe, and the PLC controller is connected to the vacuum pump, the crushing mechanism and the lifting and rotating grinding mechanism respectively through signal lines.

[0007] The sampling tank top pressure drive feeder includes several diagonal braces. The lower ends of the diagonal braces are fixed on the side wall of the mounting box. The upper ends of all the diagonal braces are fixedly connected to a point to form a conical tip. All the diagonal braces are on the same outer circle of the cone.

[0008] The crushing mechanism includes two crushing rollers spaced apart from each other on the left and right. There is a crushing gap channel that is open from top to bottom between the two crushing rollers. The front and rear ends of the crushing rollers are rotatably connected to the front and rear side walls of the mounting box through bearings. Each crushing roller is driven to a crushing motor located on the outside of the mounting box. Inside the mounting box, there is a guide plate above each of the two crushing rollers. The lower sides of the two guide plates are adjacent to each other and parallel to the crushing gap channel.

[0009] The lifting and rotating grinding mechanism includes an electric push rod, a grinding motor, grinding balls, a guide cylinder, and a grinding base. The electric push rod is vertically positioned, with its lower end hinged to the base plate. Its upper end is connected to the bottom of the grinding motor via a pressure sensor. The left and right inner walls of the mounting box are equipped with slide rails. Slider blocks that slide along the same slide rails are located on both sides of the grinding motor. The main shaft of the grinding motor is vertically upward and has a horizontally mounted connecting plate. The grinding base is located on top of the connecting plate, which is fixedly connected to the bottom of the grinding base with bolts. The grinding base has an open-top grinding groove, which includes an upper cylindrical section, a middle cylindrical section, and a lower spherical section. The middle cylindrical section is a cone shape that is larger at the top and smaller at the bottom. The diameter of the upper cylindrical section is equal to the diameter of the upper end of the middle cylindrical section. The lower end of the middle cylindrical section is seamlessly connected to the upper end of the lower spherical section. The guide cylinder is set vertically. The outer circle of the upper part of the guide cylinder is fixedly connected to the inner side wall of the mounting box through a connecting rod. The grinding ball is fixedly set at the lower end of the guide cylinder and extends into the grinding groove. The lower end of the guide cylinder has a feeding hole that communicates with the grinding groove. The bottom surface of the feeding hole is the outer surface of the grinding ball.

[0010] A guide ring is fixedly installed on the upper port of the grinding base and fitted outside the guide cylinder. A sealing ring is fixedly installed on the inner circle of the guide ring and slides and seals with the outer circle of the guide cylinder. A guide cone is installed between the two crushing rollers and the upper port of the guide cylinder. A mounting frame is installed on the inner wall of the mounting box outside the guide cone. A sealing motor is installed at the bottom of the mounting frame. The main shaft of the sealing motor is connected to a horizontally set sealing plate for sealing the upper port of the guide cylinder. The sealing plate is located below the lower port of the guide cone.

[0011] The feed cylinder is equipped with an anti-blocking conveyor, which includes a micro-motor for conveying materials located at the upper part of the feed cylinder. The outer circle of the micro-motor is fixedly connected to the inner wall of the feed cylinder through a radial rod. The main shaft of the micro-motor is vertically downward and connected to a conveying shaft coaxial with the feed cylinder. The outer circle of the conveying shaft is equipped with spiral blades. The upper end of the micro-motor is equipped with a guide cone that is pointed at the top and thick at the bottom. The front side of the mounting box is equipped with multiple transparent observation windows spaced from top to bottom. The right side of the mounting box is equipped with a cleaning door that is horizontally corresponding to the grinding seat.

[0012] The gas collection and detection device includes a gas collection pipe, a touch screen display, a gas storage tank, and a mining gas detector. A pipe connector is located on the upper side of the feed cylinder. The gas collection pipe inlet is connected to the pipe connector, and the gas collection pipe outlet is connected to the gas storage tank inlet. A vacuum pump and a first solenoid valve are installed on the gas collection pipe. The detection port of the mining gas detector is connected to the gas storage tank outlet via a detection pipe. A second solenoid valve is installed on the detection pipe. The touch screen display is located on the front side of the mounting box. A PLC controller is bidirectionally connected to the touch screen display. The output terminals of the PLC controller are connected to the vacuum pump, crushing motor, electric push rod, grinding motor, sealing motor, pressure sensor, vacuum pump, first solenoid valve, and second solenoid valve, respectively. The signal output terminal of the mining gas detector is connected to the signal input terminal of the touch screen display.

[0013] By adopting the above technical solution, compared with the prior art, this utility model has the following beneficial effects:

[0014] 1) In this invention, drill cuttings generated after drilling on-site are used as samples, immediately loaded into a sampling container, and poured into a crushing and grinding testing device on-site for real-time testing. The testing method involves detecting the composition and proportion of gases generated during the grinding process. The gas components include methane, carbon dioxide, carbon monoxide, hydrogen, hydrogen sulfide, nitrogen, etc. This operating method makes the test results more accurate.

[0015] 2) The sampling canister uses an upper loading port and a lower discharging port. Each conical arc-shaped plate in the discharging hopper automatically opens upon pressing, with torsion springs ensuring a good seal when the conical arc-shaped plates are not subjected to external force. Before discharging, the canister body is sealed in the mounting box and a vacuum is applied to reduce the opportunity and time for the sample to come into contact with air, thus improving detection accuracy. The conical arc-shaped grooves at the lower end of the conical arc-shaped plates form a discharging drive groove, which engages with the conical tip at the upper end of the inclined support rod fixed inside the mounting box. Pressing down on the canister easily opens the conical arc-shaped plates, making feeding very convenient.

[0016] 3) In order to shorten the grinding time and improve the detection efficiency, a crushing mechanism is specially set up to crush large samples into granules. The crushing mechanism adopts a roller structure, and each crushing roller is driven by a crushing motor. They can be driven at the same speed or at different speeds, which can be adjusted according to different samples.

[0017] 4) When the sample is coal dust, gas is generated during the crushing process; therefore, it is not necessary to seal the upper port of the feed cylinder. If the sample is rock dust, almost no gas is generated during the crushing process. Therefore, the sealing motor is started to drive the sealing plate to seal the upper port of the feed cylinder, which increases efficiency when the air pump is used for extraction. Three to four discharge holes are evenly arranged circumferentially at the lower end of the feed cylinder. Due to the small diameter of the discharge holes, an anti-clogging conveyor is installed inside the feed cylinder to avoid clogging. This conveyor uses a micro-motor to drive the spiral blades for feeding. The guide cone design makes the discharge from the upper port of the feed cylinder smoother.

[0018] 5) The setting of multiple transparent observation windows facilitates the observation of various parts inside the installation box, thereby improving the detection efficiency; the setting of guide ring and sealing ring not only seals the inside of the grinding tank, but also provides good concentric guidance when the grinding seat rotates.

[0019] 6) The grinding tank consists of an upper cylindrical section, a middle cylindrical section, and a lower spherical section from top to bottom. This structure not only facilitates sample falling into the lower spherical section but also enhances the grinding effect when combined with the grinding balls. The connecting plate and the grinding base are bolted together for easy disassembly and installation of the grinding base. Sliding blocks on both sides of the grinding motor are slidably connected to the rails on the inner wall of the mounting box to ensure the stability of the grinding motor during lifting and lowering as well as during the rotation of the grinding base.

[0020] In summary, this utility model is based on sound principles and is easy to operate. It allows for the on-site detection of the gas composition and proportion during the crushing and grinding process of samples. On the one hand, it can provide new insights into the role of tectonic stress in coalification and establish a comprehensive theory of coalification. On the other hand, it reveals the gas source and mechanism during the deformation of tectonic coal, providing a scientific basis for geological prospecting, research on the sources of excessive gas in coal mines, and prevention and control of coal and gas outbursts. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the sampling container;

[0023] Figure 3 yes Figure 2 A bottom view;

[0024] Figure 4 This is a schematic diagram showing the connection between the gas collection and detection device, the feed cylinder, and the grinding seat;

[0025] Figure 5 This is a block diagram of the electrical control principle in this utility model. Detailed Implementation

[0026] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0027] like Figures 1-5 As shown, this utility model discloses a coal and rock sample sampling and testing device, comprising a horizontally arranged base plate 8 with wheels 9 at its bottom. A mounting box 10 is mounted on the base plate 8, containing a vacuum pump 11, a rechargeable battery (not shown), and a PLC controller 51. The outlet of the vacuum pump 11 is connected to the outside of the mounting box 10. A feeding port is located at the top of the mounting box 10, with a cover 12 at the feeding port. Inside the mounting box 10, from top to bottom, are a sampling tank top-pressure driven feeder, a crushing mechanism, and a lifting and rotating grinding mechanism. The lifting and rotating grinding mechanism is connected to a gas collection and detection device via a gas collection pipe 13. The PLC controller 51 is connected to the crushing mechanism and the lifting and rotating grinding mechanism via signal lines. The rechargeable battery powers the crushing mechanism, the lifting and rotating grinding mechanism, and the PLC controller 51. All electrical components in this utility model are explosion-proof.

[0028] The sampling tank top pressure drive feeder includes several diagonal braces 14. The lower ends of the diagonal braces 14 are fixed on the side wall of the mounting box 10. The upper ends of all the diagonal braces 14 are fixedly connected to a point to form a conical tip 15. All the diagonal braces 14 are on the outer circle of the same cone.

[0029] The crushing mechanism includes two crushing rollers 16 spaced apart from each other, with a crushing gap channel 17 that is open from top to bottom between the two crushing rollers 16. The front and rear ends of the crushing rollers 16 are rotatably connected to the front and rear side walls of the mounting box 10 through bearings. Each crushing roller 16 is driven to the front or rear side by a crushing motor 53 located outside the mounting box 10. Inside the mounting box 10, above the two crushing rollers 16, there is a guide plate 18. The lower sides of the two guide plates 18 are adjacent to and parallel to the crushing gap channel 17.

[0030] The lifting and rotating grinding mechanism includes an electric push rod 19, a grinding motor 20, grinding balls 21, a guide cylinder 22, and a grinding seat 23. The electric push rod 19 is vertically arranged, and its lower end is hinged to the base plate 8. The upper end of the electric push rod 19 is connected to the bottom of the grinding motor 20 via a pressure sensing plate 24 (thin circular pressure sensor). The inner walls of the left and right sides of the mounting box 10 are provided with slide rails 25. The left and right sides of the grinding motor 20 are provided with sliders 26 that slide along the slide rails 25 on the same side. The main shaft of the grinding motor 20 is vertically upward and a connecting plate 27 is horizontally provided. The grinding seat 23 is located on top of the connecting plate 27 and is fixed to the bottom of the grinding seat 23 by bolts. The grinding base 23 has an open-top grinding groove 28. The grinding groove 28 includes an upper cylindrical section 29, a middle cylindrical section 30, and a lower spherical section 31. The middle cylindrical section 30 is a cone shape with a larger upper part and a smaller lower part. The diameter of the upper cylindrical section 29 is equal to the diameter of the upper end of the middle cylindrical section. The lower end of the middle cylindrical section 30 is seamlessly connected to the upper end of the lower spherical section 31. The guide cylinder 22 is vertically arranged. The upper outer circle of the guide cylinder 22 is fixedly connected to the inner wall of the mounting box 10 through the connecting rod 6. The grinding ball 21 is fixedly arranged at the lower end of the guide cylinder 22 and extends into the grinding groove 28. The lower end of the guide cylinder 22 has a discharge hole 32 that communicates with the grinding groove 28. The bottom surface of the discharge hole 32 is the outer circular surface of the grinding ball 21.

[0031] A guide ring 33 is fixedly provided at the upper port of the grinding seat 23 and sleeved on the outside of the guide cylinder 22. A sealing ring 34 is fixedly provided on the inner circle of the guide ring 33 and slides and seals with the outer circle of the guide cylinder 22. A guide cone cylinder 35 is provided between the two crushing rollers 16 and the upper port of the guide cylinder 22. A mounting frame 36 is provided on the inner wall of the mounting box 10 and located on the outside of the guide cone cylinder 35. A sealing motor 37 is provided at the bottom of the mounting frame 36. The main shaft of the sealing motor 37 is connected to a horizontally set sealing plate 38 for sealing the upper port of the guide cylinder 22. The sealing plate 38 is located below the lower port of the guide cone cylinder 35.

[0032] The guide cylinder 22 is equipped with an anti-blocking conveyor, which includes a conveying micro motor 39 located in the upper part of the guide cylinder 22. The outer circle of the conveying micro motor 39 is fixedly connected to the inner wall of the guide cylinder 22 through a radial rod 40. The main shaft of the conveying micro motor 39 is vertically downward and connected to a conveying shaft coaxial with the guide cylinder 22. The outer circle of the conveying shaft is provided with a spiral blade 41. The upper end of the conveying micro motor 39 is provided with a guide cone 42 that is pointed at the top and thick at the bottom. The front side of the mounting box 10 is provided with multiple transparent observation windows spaced from top to bottom. The right side of the mounting box 10 is provided with a cleaning door 43 that is horizontally corresponding to the grinding seat 23.

[0033] The gas collection and detection device includes a gas collection pipe 13, a touch screen display 52, a gas storage tank 44, and a mining gas detector 45. A pipe connector 46 is provided on the upper side of the feed cylinder 22. The gas inlet of the gas collection pipe 13 is connected to the pipe connector 46, and the gas outlet of the gas collection pipe 13 is connected to the gas inlet of the gas storage tank 44. A vacuum pump 47 and a first solenoid valve 48 are provided on the gas collection pipe 13. The detection port of the mining gas detector 45 is connected to the gas outlet of the gas storage tank 44 through a detection pipe 49. A second solenoid valve 50 is provided on the detection pipe 49. The touch screen display 52 is located on the front side of the mounting box 10. The PLC controller 51 is bidirectionally connected to the touch screen display 52. ​​The output terminal of the PLC controller 51 is connected to the vacuum pump 11, the crushing motor 53, the electric push rod 19, the grinding motor 20, the sealing motor 37, the pressure sensing plate 24, the vacuum pump 47, the first solenoid valve 48, and the second solenoid valve 50, respectively. The signal output terminal of the mining gas detector 45 is connected to the signal input terminal of the touch screen display 52.

[0034] This utility model enables on-site testing of coal and / or rock samples, including the following steps:

[0035] (1) Drilling holes in the coal mine to obtain coal cuttings and / or rock cuttings samples, and loading the samples into a sampling container;

[0036] (2) Pour the sample from the sampling container into the crushing and grinding testing device;

[0037] (3) The crushing and grinding detection device crushes and grinds the sample from top to bottom, collects the gas generated by the sample during the grinding process, and detects the composition of the collected gas.

[0038] (4) After the test is completed, clean up the powder sample after grinding.

[0039] The sampling tank in step (1) includes a cylindrical tank body 1. The upper end of the tank body 1 is connected to a tank cover 2 by a threaded connection. The lower end of the tank body 1 is provided with a discharge hopper 3 that is larger at the top and smaller at the bottom, forming a cone shape. The discharge hopper 3 is composed of several conical arc plates 4 with the same structure joined together. The length direction of the joint surface between two adjacent conical arc plates 4 is along the generatrix direction of the discharge hopper 3. The upper side of each conical arc plate 4 is hinged to the lower edge of the tank body 1 by a hinge 5. A torsion spring (not shown in the figure) is installed on the pin of the hinge 5. The spring arms at both ends of the torsion spring are pressed against the tank body 1 and the conical arc plate 4 respectively. Under the action of the torsion spring, each conical arc plate 4 is pressed against each other and sealed. Each conical arc plate 4 has a conical arc groove with the same structure on the inner side of its lower end. All the conical arc grooves are enclosed to form a discharge drive groove 7 that is pointed at the top and thick at the bottom.

[0040] The specific process of loading the sample into the sampling container in step (1) is as follows: hold the container 1, unscrew the container cover 2, load the coal dust and / or rock dust samples from the borehole into the container 1, and then close the container cover 2.

[0041] The specific process of step (2) is as follows: unscrew the box cover 12, vertically insert the sample tank 1 into the feeding port, and insert the conical tip 15 at the upper end of the inclined support rod 14 into the discharge drive groove 7 at the lower end of the discharge hopper 3. The outer diameter of the tank 1 is equal to the diameter of the feeding port. The tank 1 seals the feeding port. Operate the touch screen 52 to start the vacuum pump 11. The vacuum pump 11 extracts the air inside the installation box 10. When the vacuum degree inside the installation box 10 reaches the required level, turn off the vacuum pump 11. Then press down on the tank 1, and the discharge hopper at the lower end of the tank 1 will open. 3. The discharge drive groove 7 moves downward along the discharge tip. Multiple diagonal braces 14 generate a horizontal thrust on the discharge drive groove 7. The horizontal thrust overcomes the elastic force of the torsion spring and pushes the discharge drive groove 7 outward. The conical arc plate 4 rotates outward with the pin of the hinge 5 as the fulcrum. The lower end of the conical arc plate 4 gradually opens to form the discharge port. The sample falls from the tank 1 downward onto the two guide plates 18 in the mounting box 10. After all the samples in the tank 1 have fallen, the tank 1 is taken out upward and the box cover 12 is quickly screwed on to close the feeding port.

[0042] The specific process of step (3) is as follows: control the touch screen 52, start the crushing motor 53 and the conveying micro motor 39. The crushing motor 53 drives the crushing roller 16 to rotate. The sample on the two guide plates 18 slides into the crushing gap channel 17 between the two crushing rollers 16 to crush the larger sample. The crushed granular sample falls into the guide pyramidal cylinder 35 and then slides into the guide cylinder 22. The conveying micro motor 39 drives the spiral blade 41 to rotate. The spiral blade 41 conveys the granular sample downward and through the discharge hole at the lower end of the guide cylinder 22. 32 falls into the grinding tank 28. After the sample on the two grinding rollers 16 is observed to be completely crushed, the grinding motor 53 is turned off. After the granular sample in the guide cylinder 22 is observed to be completely conveyed downwards, the conveying micro motor 39 is turned off. If the sample is rock, the sealing motor 37 is started. The sealing motor 37 drives the sealing plate 38 to rotate above the guide cylinder 22 to seal the upper port of the guide cylinder 22. Then, the electric push rod 19, the grinding motor 20 and the air pump 47 are started, the first solenoid valve 48 is opened, the electric push rod 19 extends, and drives the grinding motor 20 and the grinding seat. 23 moves upward, and simultaneously, slider 26 slides upward along slide rail 25. Grinding motor 20 drives grinding seat 23 to rotate via connecting plate 27. The granular sample inside grinding seat 23 is ground by grinding balls 21. When pressure sensor 24 detects that the pressure has reached the set value, it transmits the pressure signal to PLC controller 51. PLC controller 51 sends a stop command to electric push rod 19. Grinding motor 20 continues to drive grinding seat 23 to rotate, and the sample particles inside grinding seat 23 are ground into powder. The gas generated during the grinding process is pumped by vacuum pump 47. The gas is drawn into the storage tank 44 and stored. After grinding for the set time, the grinding motor 20 and the air pump 47 are turned off, the first solenoid valve 48 is closed, and the second solenoid valve 50 is opened. The gas in the storage tank 44 is transported to the mining gas detector 45 for testing. The mining gas detector 45 detects the composition and proportion of the gas and displays the specific data on the touch screen 52. Finally, the second solenoid valve 50 is closed, and the electric push rod 19 is started. The electric push rod 19 retracts, driving the grinding motor 20 and the grinding seat 23 to move downwards and reset. This completes the gas production detection of the sample.

[0043] The specific process of step (4) is as follows: open the cleaning door 43, unscrew the bolts between the connecting plate 27 and the grinding seat 23, take out the grinding seat 23, and pour out the sample powder inside the grinding seat 23; then release the gas in the gas storage tank 44.

[0044] It should be noted that the PLC controller 51, touch screen display 52 (bidirectional signal), vacuum pump 11, crushing motor 53, electric push rod 19, grinding motor 20, sealing motor 37, pressure sensor 24, vacuum pump 47, first solenoid valve 48, second solenoid valve 50, and mine gas detector 45 in this utility model are all existing technologies and are commercially available. The automatic control via the touch screen display is all on / off control and does not involve new computer programs. The mine gas detector 45's detection of the composition and proportions of mixed gases such as methane, carbon dioxide, carbon monoxide, hydrogen, hydrogen sulfide, and nitrogen is also conventional technology. The mine gas detector 45 is a multi-parameter gas detector.

[0045] This invention can also close the first solenoid valve 48 and the second solenoid valve 50, and store the collected mixed gas in the gas storage tank 44. This invention can be transported to the coal mine laboratory for testing using instruments such as gas chromatograph and infrared gas analyzer.

[0046] The above embodiments illustrate the basic principles and features of this utility model, but the above descriptions are merely preferred embodiments and are not limited to these embodiments. Those skilled in the art, inspired by this application, can make many modifications and improvements without departing from the spirit and scope of the claims, all of which fall within the protection scope of this utility model. Therefore, the patent and scope of protection of this utility model should be determined by the appended claims.

Claims

1. A coal rock sample sampling and detecting device, characterized in that: The device comprises a horizontally arranged bottom plate, a walking wheel arranged at the bottom of the bottom plate, a mounting box arranged on the bottom plate, a vacuum pump, a rechargeable battery and a PLC controller arranged in the mounting box, an outlet of the vacuum pump being communicated with the outside of the mounting box, a feeding opening arranged at the top of the mounting box, a box cover arranged at the feeding opening, a sampling tank top pressure driven discharger, a crushing mechanism and a lifting rotary grinding mechanism arranged in the mounting box from top to bottom, the lifting rotary grinding mechanism being connected with a gas collection and detection device through a gas collection pipe, and the PLC controller being connected with the vacuum pump, the crushing mechanism and the lifting rotary grinding mechanism through signal lines.

2. The coal rock sample sampling and detecting device according to claim 1, characterized in that: The sampling tank top pressure driven discharger comprises a plurality of inclined support rods, the lower ends of the inclined support rods being fixedly arranged on the side walls of the mounting box, the upper ends of all the inclined support rods being fixedly connected to form a conical point, and all the inclined support rods being arranged on the outer circle of the same conical body.

3. The coal rock sample sampling and detecting device according to claim 2, characterized in that: The crushing mechanism comprises two crushing rollers arranged at intervals, a crushing gap channel being arranged between the two crushing rollers, the two crushing rollers being rotatably connected to the front and rear side walls of the mounting box through bearings, and a crushing motor being arranged outside the mounting box and being drivingly connected to the front side or the rear side of each crushing roller; the mounting box is provided with a guide plate above each crushing roller, and the lower sides of the two guide plates are adjacent to and parallel to the crushing gap channel.

4. The coal rock sample sampling and detecting device according to claim 3, characterized in that: The lifting rotary grinding mechanism comprises an electric push rod, a grinding motor, a grinding ball, a guide cylinder and a grinding seat, the electric push rod being vertically arranged, the lower end of the electric push rod being arranged on the bottom plate through a hinge, the upper end of the electric push rod being connected to the bottom of the grinding motor through a pressure sensing sheet, the left and right inner walls of the mounting box being provided with slides, the left and right sides of the grinding motor being provided with sliding blocks sliding along the same side slide, the main shaft of the grinding motor being vertically upward and horizontally provided with a connecting disc, the grinding seat being arranged on the top of the connecting disc, the connecting disc being fixedly connected to the bottom of the grinding seat through bolts, the grinding seat being provided with a grinding groove with an open top, the grinding groove comprising an upper cylindrical segment, a middle cylindrical segment and a lower spherical segment, the middle cylindrical segment being conical with a large upper part and a small lower part, the diameter of the upper cylindrical segment being equal to the diameter of the upper end of the middle cylindrical segment, the lower end of the middle cylindrical segment being seamlessly connected to the upper end of the lower spherical segment, the guide cylinder being vertically arranged, the upper part of the guide cylinder being fixedly connected to the inner wall of the mounting box through a connecting rod, the grinding ball being fixedly arranged at the lower end of the guide cylinder, the grinding ball extending into the grinding groove, and the guide cylinder being provided with a discharging hole communicated with the grinding groove at the lower end, the bottom surface of the discharging hole being the outer surface of the grinding ball.

5. The coal rock sample sampling and detecting device according to claim 4, characterized in that: A guide ring is fixedly arranged on the outer part of the guide cylinder at the upper port of the grinding seat, a sealing ring is fixedly arranged in the inner circle of the guide ring and slidingly and sealingly matched with the outer circle of the guide cylinder, a guide quadrangular pyramid cylinder is arranged between the lower part of the two crushing rollers and the upper port of the guide cylinder, a mounting frame is arranged on the outer side of the guide quadrangular pyramid cylinder, a sealing motor is arranged at the bottom of the mounting frame, a sealing plate is arranged at the main shaft of the sealing motor and horizontally arranged for sealing the upper port of the guide cylinder, and the sealing plate is arranged below the lower port of the guide quadrangular pyramid cylinder.

6. The coal rock sample sampling and detecting device according to claim 5, characterized in that: The material guiding barrel is internally provided with a blockage preventing material conveying device, which comprises a material conveying micro motor arranged at the upper portion of the material guiding barrel, an outer circle of the material conveying micro motor is fixedly connected with the inner wall of the material guiding barrel through a radial rod, a main shaft of the material conveying micro motor is vertically downward and is connected with a conveying shaft coaxial with the material guiding barrel, an outer circle of the conveying shaft is provided with helical blades, and an upper end of the material conveying micro motor is provided with a material guiding cone with a sharp upper end and a thick lower end.

7. The coal rock sample sampling and detecting device according to claim 6, characterized in that: The gas collecting and detecting device comprises a gas collecting pipe, a touch display screen, a gas storage tank and a mine gas detector, a pipe joint is arranged on the upper portion of the material guiding barrel, a gas inlet of the gas collecting pipe is connected with the pipe joint, a gas outlet of the gas collecting pipe is connected with a gas inlet of the gas storage tank, a gas suction pump and a first electromagnetic valve are arranged on the gas collecting pipe, a detection port of the mine gas detector is connected with a gas outlet of the gas storage tank through a detection pipe, a second electromagnetic valve is arranged on the detection pipe, the touch display screen is arranged on the front side of the external portion of the mounting box, a PLC controller is bidirectionally signal connected with the touch display screen, output ends of the PLC controller are respectively connected with the vacuum pump, the crushing motor, the electric push rod, the grinding motor, the sealing motor, the pressure sensing sheet, the gas suction pump, the first electromagnetic valve and the second electromagnetic valve, and a signal output end of the mine gas detector is connected with a signal input end of the touch display screen.

Images