Coal dressing detection device

Abstract

The utility model relates to the technical field of coal mine detection, and discloses a coal dressing detection device which comprises a coal mine screening detection mechanism, and a supporting guide mechanism used for assisting the moving direction of the coal mine screening detection mechanism is arranged at the lower end of the coal mine screening detection mechanism. A discharging opening and closing mechanism used for controlling the coal mine discharging speed is arranged at the upper end of the coal mine screening detection mechanism, and an opening and closing driving mechanism used for driving the discharging opening and closing mechanism to operate is arranged on one side of the coal mine screening detection mechanism. A screening detection driving mechanism used for driving the coal mine screening detection mechanism and the discharging opening and closing mechanism to horizontally move in a reciprocating mode is arranged at the position, close to one side, of the upper end of the supporting and guiding mechanism. The driving mechanism is mainly used for driving the coal mine screening detection mechanism and the discharging opening and closing mechanism to move in a reciprocating mode in the horizontal direction, and due to the movement, coal can be evenly distributed on a screen, and the screening efficiency and the quality detection accuracy can be improved.

Description

Technical Field

[0001] This utility model relates to the field of coal mine testing technology, specifically to a coal preparation testing device. Background Technology

[0002] Coal preparation and testing equipment is a precision device specifically designed for coal testing and analysis. It covers the entire process from coal sampling, screening, crushing, drying, sample preparation to experimental analysis. It can accurately measure key indicators in coal such as moisture, ash, volatile matter, fixed carbon, total sulfur, calorific value, and carbon and hydrogen content, providing a scientific basis for coal quality control, environmental assessment, and industry applications.

[0003] In existing coal preparation and testing processes, the screening stage is often crucial. Screening effectively classifies coal according to particle size to meet the needs of different industrial applications. However, due to the high cost of professional screening equipment, many coal processing companies generally choose manual labor for this stage. Manual screening is not only inefficient and difficult to meet the needs of large-scale production, but also the screening effect is difficult to guarantee. Workers are prone to fatigue after long hours of work, leading to a decrease in screening accuracy and potentially resulting in mixed particle sizes, thus affecting the quality of the coal and its subsequent applications. In addition, manual screening poses safety hazards. Workers are easily injured when handling large pieces of coal or sharp coal gangue. More seriously, manual screening may lead to resource waste and environmental pollution. Due to poor screening results, some valuable coal may be discarded as waste, which not only wastes resources but may also pollute the environment. At the same time, the dust and noise generated during manual screening also pose a threat to the health of workers. Therefore, those skilled in the art provide a coal preparation and testing device to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a coal preparation and testing device to solve the problems of low efficiency in existing manual screening methods, which are difficult to meet the needs of large-scale production. Furthermore, the screening effect is unreliable, and workers are prone to fatigue after long hours of work, leading to decreased screening accuracy and potential particle size mixing, thus affecting coal quality and subsequent applications. In addition, manual screening poses safety hazards; workers are easily injured when handling large pieces of coal or sharp coal gangue. More seriously, manual screening may lead to resource waste and environmental pollution. Due to poor screening results, some valuable coal may be discarded as waste, causing not only resource waste but also potential environmental pollution. Simultaneously, the dust and noise generated during manual screening also pose a threat to workers' health.

[0005] This utility model provides the following technical solution: a coal preparation and testing device, including a coal mine screening and testing mechanism. The lower end of the coal mine screening and testing mechanism is provided with a support and guide mechanism to assist the movement direction of the coal mine screening and testing mechanism. The upper end of the coal mine screening and testing mechanism is provided with a feeding opening and closing mechanism to control the coal feeding speed. One side of the coal mine screening and testing mechanism is provided with an opening and closing drive mechanism to drive the feeding opening and closing mechanism to operate. The upper end of the support and guide mechanism is provided with a screening and testing drive mechanism to drive the coal mine screening and testing mechanism and the feeding opening and closing mechanism to reciprocate horizontally.

[0006] As a preferred embodiment of the above technical solution, the support and guiding mechanism includes a base plate, and support blocks are fixedly connected to both ends of the upper side of the base plate. Two optical axes are fixedly connected between the two support blocks on one side and the two support blocks on the other side, and sliding sleeves are slidably sleeved on the outer side of the two optical axes.

[0007] As a preferred embodiment of the above technical solution, the coal mine screening and testing mechanism includes a collection frame, which is fixedly connected to the upper end of the sliding sleeve. Pulleys are fixedly connected to the center of the lower end of the collection frame at four opposite corners. The four pulleys are in contact with the base plate. Six sliding grooves are arranged on the two inner walls of the collection frame that are far apart from each other. A door is rotatably connected to the center of one side of the collection frame near the bottom.

[0008] As a preferred embodiment of the above technical solution, each of the twelve slid grooves is slidably fitted with a slide rail, and the twelve slide rails are detachably connected to the twelve slid grooves respectively. Six sieve frames are fixedly connected between the six slide rails on one side and the six slide rails on the other side. A sieve screen is fixedly connected to the center of each of the six sieve frames. A collection box is provided on the bottom wall of the collection frame, and the collection box is detachably connected to the collection frame.

[0009] As a preferred embodiment of the above technical solution, the feeding opening and closing mechanism includes a support frame, which is fixedly connected to the top of the collection frame. The support frame has guide holes at the four diagonal corners of its upper center. Guide rods are slidably fitted inside the four guide holes. Dust covers are fixedly connected to the upper ends of the four guide rods. Multiple mounting holes are arranged through the support frame at the center of both sides.

[0010] As a preferred embodiment of the above technical solution, a rotating rod is rotatably sleeved inside each of the multiple mounting holes. Multiple louvers are fixedly connected between the multiple rotating rods on one side and the multiple rotating rods on the other side. A driving plate is fixedly connected to the end of each of the multiple rotating rods on one side away from the multiple louvers. A sliding buckle is fixedly connected to the end of the driving plate on the side away from the multiple louvers. A door latch is rotatably connected to the center of the support frame near the lower part of the door side.

[0011] As a preferred embodiment of the above technical solution, the opening and closing drive mechanism includes a support bar and an electric push rod. The support bar is fixedly connected to the upper part of the collection frame near the multiple drive plates. The electric push rod is fixedly connected to the collection frame near the support bar. A guide groove is formed through the center of the support bar on one side. A guide rail is slidably fitted inside the guide groove. A connecting bar is fixedly connected to one side of the guide rail. Multiple movable plates are arranged and fixedly connected at the center of the upper end of the connecting bar. Limiting slots are formed through the center of the centers of the multiple movable plates. Multiple sliding buckles are slidably fitted inside the multiple limiting slots. A docking lug is fixedly connected to the center of the lower end of the connecting bar. One side of the docking lug is fixedly connected to the output end of the electric push rod.

[0012] As a preferred embodiment of the above technical solution, the screening and detection driving mechanism includes a motor, which is fixedly connected to the upper end of the base plate on the side away from the box door, and a rotating wheel is fixedly connected to the output end of the motor. A sleeve is fixedly connected to the upper center of one side of the rotating wheel, and a transmission arm is rotatably sleeved on the outside of the sleeve. The end of the transmission arm away from the sleeve is rotatably connected to the center of the corresponding side of the collection frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] When the coal preparation and testing device is in use, after the coal enters the device, the flow rate is first controlled by the feeding opening and closing mechanism to ensure that an appropriate amount of coal enters the coal mine screening and testing mechanism. The screens in the coal mine screening and testing mechanism screen the coal step by step. During the screening process, the screening and testing drive mechanism drives the coal mine screening and testing mechanism and the feeding opening and closing mechanism to move back and forth in the horizontal direction to improve screening efficiency and accuracy, thereby avoiding material blockage during coal feeding. The opening and closing drive mechanism adjusts the opening and closing state of the feeding opening and closing mechanism according to actual needs to control the coal feeding speed. The support and guide mechanism is located at the lower end of the coal mine screening and testing mechanism. Its main function is to provide support and assist the coal mine screening and testing mechanism in moving in the horizontal direction, which ensures the stability and accuracy of the screening process. The coal mine screening and testing mechanism is the core part of the device, used for step-by-step screening and filtering of coal, and includes multiple screens with different mesh sizes. The screen is used to classify coal particles and detect their quality. The feeding opening and closing mechanism is located at the top of the coal mine screening and detection mechanism to control the coal feeding speed. By adjusting the opening degree of the opening and closing mechanism, the flow rate of coal entering the coal mine screening and detection mechanism can be precisely controlled, thereby optimizing the screening effect. The opening and closing drive mechanism is located on one side of the coal mine screening and detection mechanism to drive the operation of the feeding opening and closing mechanism. By providing power, the opening and closing drive mechanism can precisely control the opening and closing state of the feeding opening and closing mechanism, thereby achieving the adjustment of the feeding speed. The screening and detection drive mechanism is located on one side of the upper end of the support and guide mechanism. Its main function is to drive the coal mine screening and detection mechanism and the feeding opening and closing mechanism to move back and forth in the horizontal direction. This movement not only helps the coal to be evenly distributed on the screen, but also improves the screening efficiency and the accuracy of quality detection. This device has low assembly cost and greatly reduces the workload of workers. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of a coal preparation and testing device;

[0016] Figure 2 A three-dimensional disassembled structural diagram of a coal preparation and testing device;

[0017] Figure 3 A three-dimensional disassembled structural diagram of a coal preparation and testing device from another perspective;

[0018] Figure 4 A three-dimensional disassembled structural diagram of the coal mine screening and testing mechanism of a coal preparation and testing device;

[0019] Figure 5 A three-dimensional disassembled structural diagram of the feeding opening and closing mechanism of a coal preparation and testing device;

[0020] Figure 6 This is a three-dimensional disassembled structural diagram of the opening and closing drive mechanism of a coal preparation and testing device.

[0021] Legend:

[0022] 1. Support and guiding mechanism; 101. Base plate; 102. Support block; 103. Optical axis; 104. Sliding sleeve; 2. Coal mine screening and testing mechanism; 201. Collection frame; 202. Pulley; 203. Slide groove; 204. Box door; 205. Slide rail; 206. Screen frame; 207. Screen mesh; 208. Collection box; 3. Discharge opening and closing mechanism; 301. Support frame; 302. Guide hole; 303. Guide rod; 304. Dust cover; 305. Mounting hole; 306. Rotating rod; 307. Opening and closing louver; 308. Drive plate; 309. Sliding buckle; 3010. Door latch; 4. Opening and closing drive mechanism; 401. Support bar; 402. Electric push rod; 403. Guide groove; 404. Guide rail; 405. Connecting bar; 406. Movable plate; 407. Limiting groove; 408. Docking lug; 5. Screening and detection drive mechanism; 501. Motor; 502. Rotary wheel; 503. Sleeve column; 504. Transmission arm. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] like Figures 1-3As shown, this utility model provides a technical solution: a coal preparation and testing device, including a coal mine screening and testing mechanism 2. A support and guide mechanism 1 is provided at the lower end of the coal mine screening and testing mechanism 2 to assist in its movement direction. A feeding opening and closing mechanism 3 is provided at the upper end of the coal mine screening and testing mechanism 2 to control the coal feeding speed. An opening and closing drive mechanism 4 is provided on one side of the coal mine screening and testing mechanism 2 to drive the feeding opening and closing mechanism 3. A screening and testing drive mechanism 5 is provided on one side of the upper end of the support and guide mechanism 1 to drive the coal mine screening and testing mechanism 2 and the feeding opening and closing mechanism 3 to reciprocate horizontally. When coal enters... When coal enters the device, the flow rate is first controlled by the feeding opening and closing mechanism 3 to ensure that an appropriate amount of coal enters the coal mine screening and testing mechanism 2. The screen 207 in the coal mine screening and testing mechanism 2 performs step-by-step screening of the coal. During the screening process, the screening and testing drive mechanism 5 drives the coal mine screening and testing mechanism 2 and the feeding opening and closing mechanism 3 to move back and forth in the horizontal direction to improve screening efficiency and accuracy, thereby avoiding material blockage during coal feeding. The opening and closing drive mechanism 4 adjusts the opening and closing state of the feeding opening and closing mechanism 3 according to actual needs to control the coal feeding speed. The support and guide mechanism 1 is located at the lower end of the coal mine screening and testing mechanism 2. Its main function is to provide support and assist the coal mine screening and testing mechanism 2 in moving horizontally, ensuring stability and accuracy during the screening process. The coal mine screening and testing mechanism 2 is the core component of the device, used for step-by-step screening and filtering of coal. It includes multiple screens 207 with different mesh sizes to classify coal particle size and detect its quality. The feeding opening and closing mechanism 3 is located at the upper end of the coal mine screening and testing mechanism 2 to control the coal feeding speed. By adjusting the opening degree of the opening and closing mechanism, the flow rate of coal entering the coal mine screening and testing mechanism 2 can be precisely controlled, thereby optimizing the screening effect. The opening and closing drive mechanism 4 is located in the coal mine... One side of the screening and testing mechanism 2 is used to drive the operation of the feeding opening and closing mechanism 3. By providing power, the opening and closing drive mechanism 4 can precisely control the opening and closing state of the feeding opening and closing mechanism 3, thereby realizing the adjustment of the feeding speed. The screening and testing drive mechanism 5 is set on one side of the upper end of the support and guide mechanism 1. Its main function is to drive the coal mine screening and testing mechanism 2 and the feeding opening and closing mechanism 3 to move back and forth in the horizontal direction. This movement not only helps the coal to be evenly distributed on the screen 207, but also improves the screening efficiency and the accuracy of quality detection. This device not only has a low assembly cost, but also greatly reduces the workload of workers.

[0025] As one implementation method in this embodiment, such as Figure 4As shown, the support and guiding mechanism 1 includes a base plate 101. Support blocks 102 are fixedly connected to both ends of the upper side of the base plate 101. Two optical axes 103 are fixedly connected between two support blocks 102 on one side and two support blocks 102 on the other side. Sliding sleeves 104 are slidably fitted onto the outer sides of the two optical axes 103. The coal mine screening and detection mechanism 2 includes a collection frame 201. The collection frame 201 is fixedly connected to the upper end of the sliding sleeves 104. Pulleys 202 are fixedly connected to the four diagonal points of the lower center of the collection frame 201. The 02 is in contact with the substrate 101. Six grooves 203 are arranged on both inner walls of the collection frame 201, away from each other. A door 204 is rotatably connected to the lower center of one side of the collection frame 201. Slide rails 205 are slidably fitted inside each of the twelve grooves 203, and the twelve slide rails 205 are detachably connected to the twelve grooves 203. Six sieve frames 206 are fixedly connected between the six slide rails 205 on one side and the six slide rails 205 on the other side. A sieve is fixedly connected to the center of each of the six sieve frames 206. A collection box 208 is installed on the bottom wall of the collection frame 201 and the mesh 207. The collection box 208 is detachably connected to the collection frame 201. When coal is fed into the collection frame 201, it is screened through screens 207 of different mesh sizes. Coal of different particle sizes falls onto different screen frames 206, and the finer ash falls into the collection box 208 for collection. The coal mine screening and detection mechanism 2 moves horizontally by sliding the sliding sleeve 104 on the optical axis 103. This movement can be driven by the screening and detection drive mechanism 5. The coal preparation and testing device achieves automated screening and testing. The base plate 101, support block 102, and pulley 202 work together to ensure the stability and support of the coal mine screening and testing mechanism 2 during movement, preventing shaking and deviation during screening. The detachable design of the screen frame 206, screen 207, and collection box 208 facilitates the replacement of screens 207 with different mesh sizes, cleaning, and maintenance of the entire device. Through the coordinated work of the support and guide mechanism 1 and the coal mine screening and testing mechanism 2, this coal preparation and testing device achieves efficient screening and accurate collection of coal.

[0026] As one implementation method in this embodiment, such as Figure 5As shown, the feeding opening and closing mechanism 3 includes a support frame 301, which is fixedly connected to the top of the collecting frame 201. Guide holes 302 are provided at the four opposite corners of the upper center of the support frame 301. Guide rods 303 are slidably fitted inside each of the four guide holes 302. Dust covers 304 are fixedly connected to the upper ends of the four guide rods 303. Multiple mounting holes 305 are arranged through the support frame 301 on both sides of the inner center. Rotary mounting elements are rotatably fitted inside each of the multiple mounting holes 305. Rod 306, with multiple rotating rods 306 on one side and multiple rotating rods 306 on the other side fixedly connected to multiple opening and closing louvers 307. A drive plate 308 is fixedly connected to the end of each rotating rod 306 on one side away from the multiple opening and closing louvers 307. A sliding buckle 309 is fixedly connected to one end of each drive plate 308 on the side away from the multiple opening and closing louvers 307. A latch 3010 is rotatably connected to the lower center of the support frame 301 near the door 204, for controlling material feeding. At the specified speed, the sliding buckle 309 and the driving plate 308 are driven by the opening and closing drive mechanism 4, which in turn drives the rotating rod 306 and the opening and closing louver 307 to rotate. The rotation of the opening and closing louver 307 changes its opening degree, thereby controlling the speed and amount of coal falling from the support frame 301 into the collection frame 201. The dust cover 304 is slidably connected by the guide rod 303 and the guide hole 302, and can move up and down when needed. When the dust cover 304 is in the closed state, it can effectively prevent dust generated during the coal feeding process. The support frame 301, as the main frame of the feeding opening and closing mechanism 3, provides sufficient stability and support to ensure the stability and reliability of the opening and closing louver 307 and the dust cover 304 during operation. The feeding opening and closing mechanism 3 realizes the control of coal feeding speed and dust prevention function through the rotation of the opening and closing louver 307 and the up and down movement of the dust cover 304. At the same time, the support frame 301 and the guide rod 303 and other structures ensure the stability and reliability of the entire mechanism.

[0027] As one implementation method in this embodiment, such as Figure 6As shown, the opening and closing drive mechanism 4 includes a support bar 401 and an electric push rod 402. The support bar 401 is fixedly connected to the upper part of the collection frame 201 near the multiple drive plates 308. The electric push rod 402 is fixedly connected to the collection frame 201 near the support bar 401. A guide groove 403 is provided through the center of the support bar 401 on one side. A guide rail 404 is slidably fitted inside the guide groove 403. A connecting bar 405 is fixedly connected to one side of the guide rail 404. The upper center of the connecting bar 405 is... Multiple movable plates 406 are fixedly connected in a row. Each movable plate 406 has a limiting slot 407 extending through its center. Multiple sliding buckles 309 are slidably fitted inside the limiting slots 407. A mating lug 408 is fixedly connected to the center of the lower end of the connecting strip 405. One side of the mating lug 408 is fixedly connected to the output end of the electric push rod 402. When the electric push rod 402 is activated, its output end pushes the mating lug 408 and the connecting strip 405 along the guide groove 403 and guide rail 404. The guide bar 405 moves linearly, causing the limiting slot 407 on the movable plate 406 to slide onto the sliding buckle 309, thus connecting the connecting bar 405 and the opening / closing louver 307 through the drive plate 308 and the sliding buckle 309. As the connecting bar 405 continues to move, the sliding buckle 309 and the drive plate 308 drive the opening / closing louver 307 to rotate around the rotating rod 306, thereby changing the opening degree of the opening / closing louver 307 and controlling the coal feeding speed. The arrangement of the groove 403 and guide rail 404 ensures the stability and straightness of the connecting bar 405 during movement, preventing transmission errors caused by shaking or offset. The opening and closing drive mechanism 4 achieves precise control and drive of the opening and closing louver 307 through the power transmission of the electric push rod 402 and the guiding effect of the guide groove 403 and guide rail 404. At the same time, the arrangement of the movable plate 406 and the limiting slot 407 ensures reliable connection and transmission between the connecting bar 405 and the opening and closing louver 307.

[0028] As one implementation method in this embodiment, such as Figures 2-3As shown, the screening and detection drive mechanism 5 includes a motor 501, which is fixedly connected to the upper end of the base plate 101 on the side away from the door 204. A rotating wheel 502 is fixedly connected to the output end of the motor 501. A sleeve 503 is fixedly connected to the upper center of one side of the rotating wheel 502. A transmission arm 504 is rotatably sleeved on the outside of the sleeve 503. The end of the transmission arm 504 away from the sleeve 503 is rotatably connected to the center of the corresponding side of the collection frame 201. When the motor 501 starts, its output end drives the rotating wheel 502 to rotate. The rotation of the rotating wheel 502 further drives the sleeve 503 to rotate. Since the transmission arm 504 is rotatably sleeved on the outside of the sleeve 503, the transmission arm 504 will swing with the rotation of the sleeve 503. The end of the transmission arm 504 away from the sleeve 503 is rotatably connected to the center of the corresponding side of the collection frame 201. Therefore, when the transmission arm 504 swings, it will drive the collection frame 201 to move in the horizontal direction.

[0029] Working principle: When coal is fed into the collection frame 201, it is screened through screens 207 with different mesh sizes. Coal of different particle sizes falls onto different screen frames 206, and the finer ash falls into the collection box 208 for collection. The coal mine screening and detection mechanism 2 moves horizontally by sliding the sliding sleeve 104 on the optical shaft 103. This movement is powered by the screening and detection drive mechanism 5 to achieve automated screening and detection. The base plate 101, support block 102, and pulley 202 work together to ensure the stability and support of the coal mine screening and detection mechanism 2 during movement, preventing shaking and deviation during screening. The detachable design of the screen frame 206, screen 207, and collection box 208 facilitates the replacement of screens 207 with different mesh sizes. The entire device is cleaned and maintained. When it is necessary to control the feeding speed, the sliding buckle 309 and the driving plate 308 are driven by the opening and closing drive mechanism 4, which in turn drives the rotating rod 306 and the opening and closing louver 307 to rotate. The rotation of the opening and closing louver 307 changes its opening degree, thereby controlling the speed and amount of coal falling from the support frame 301 into the collection frame 201. The dust cover 304 is slidably connected by the guide rod 303 and the guide hole 302, and can move up and down when needed. When the dust cover 304 is in the closed state, it can effectively prevent dust generated during the feeding process. The support frame 301, as the main frame of the feeding opening and closing mechanism 3, provides sufficient stability and support to ensure the stability and reliability of the opening and closing louver 307 and the dust cover 304 during operation. To ensure reliability, the feeding opening and closing mechanism 3 controls the coal feeding speed and provides dust prevention through the rotation of the opening and closing louvers 307 and the up and down movement of the dust cover 304. Simultaneously, the support frame 301 and guide rod 303 ensure the stability and reliability of the entire mechanism. When the electric push rod 402 is activated, its output end pushes the docking lug 408 and connecting strip 405 to move linearly under the guidance of the guide groove 403 and guide rail 404. The movement of the connecting strip 405 causes the limiting slot 407 on the movable plate 406 to slide onto the sliding buckle 309, thus connecting the connecting strip 405 and the opening and closing louvers 307 through the drive plate 308 and the sliding buckle 309. As the connecting strip 405 continues to move, the sliding buckle 309 and the drive plate 308 continue to move. The transmission action of the 8-axis drives the louver 307 to rotate around the rotating rod 306, thereby changing the opening degree of the louver 307 and controlling the coal feeding speed. The guide groove 403 and guide rail 404 ensure the stability and straightness of the connecting bar 405 during movement, preventing transmission errors caused by shaking or offset. This opening and closing drive mechanism 4 achieves precise control and drive of the louver 307 through the power transmission of the electric push rod 402 and the guiding action of the guide groove 403 and guide rail 404. At the same time, the movable plate 406 and the limiting slot 407 ensure reliable connection and transmission between the connecting bar 405 and the louver 307. When the motor 501 starts, its output end drives the rotating wheel 502 to rotate.The rotation of the rotating wheel 502 further drives the sleeve 503 to rotate. Since the transmission arm 504 is rotatably sleeved on the outside of the sleeve 503, the transmission arm 504 swings as the sleeve 503 rotates. The end of the transmission arm 504 furthest from the sleeve 503 is rotatably connected to the center of the corresponding side of the collection frame 201. Therefore, when the transmission arm 504 swings, it drives the collection frame 201 to move horizontally.

[0030] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A coal preparation and testing device, comprising a coal mine screening and testing mechanism (2), characterized in that: The lower end of the coal mine screening and testing mechanism (2) is provided with a support and guide mechanism (1) for assisting the movement direction of the coal mine screening and testing mechanism (2). The upper end of the coal mine screening and testing mechanism (2) is provided with a feeding opening and closing mechanism (3) for controlling the coal feeding speed. The side of the coal mine screening and testing mechanism (2) is provided with an opening and closing drive mechanism (4) for driving the feeding opening and closing mechanism (3) to operate. The upper end of the support and guide mechanism (1) is provided with a screening and testing drive mechanism (5) for driving the coal mine screening and testing mechanism (2) and the feeding opening and closing mechanism (3) to move back and forth horizontally.

2. The coal preparation and testing device according to claim 1, characterized in that: The support and guide mechanism (1) includes a base plate (101). Support blocks (102) are fixedly connected to both ends of the upper side of the base plate (101). Two optical axes (103) are fixedly connected between the two support blocks (102) on one side and the two support blocks (102) on the other side. Sliding sleeves (104) are slidably sleeved on the outer side of the two optical axes (103).

3. The coal preparation and testing device according to claim 2, characterized in that: The coal mine screening and testing mechanism (2) includes a collection frame (201), which is fixedly connected to the upper end of the sliding sleeve (104). The lower center of the collection frame (201) is fixedly connected to four opposite corners with pulleys (202). The four pulleys (202) are in contact with the base plate (101). The two inner walls of the collection frame (201) that are far apart from each other are provided with six sliding grooves (203). A door (204) is rotatably connected to the lower center of one side of the collection frame (201).

4. The coal preparation and testing device according to claim 3, characterized in that: Each of the twelve slid grooves (203) is fitted with a slide rail (205), and the twelve slide rails (205) are detachably connected to the twelve slid grooves (203). Six slide rails (205) on one side and six slide rails (205) on the other side are fixedly connected to six sieve frames (206). A sieve mesh (207) is fixedly connected to the center of each of the six sieve frames (206). A collection box (208) is provided on the bottom wall of the collection frame (201), and the collection box (208) is detachably connected to the collection frame (201).

5. The coal preparation and testing device according to claim 4, characterized in that: The feeding opening and closing mechanism (3) includes a support frame (301), which is fixedly connected to the top of the collection frame (201). The support frame (301) has guide holes (302) at the four diagonal corners of the upper center of the support frame (301). Guide rods (303) are slidably fitted inside the four guide holes (302). Dust covers (304) are fixedly connected to the upper ends of the four guide rods (303). Multiple mounting holes (305) are arranged through the center of the support frame (301) on both sides.

6. The coal preparation and testing device according to claim 5, characterized in that: Rotating rods (306) are rotatably sleeved inside the multiple mounting holes (305). Multiple louvers (307) are fixedly connected between the multiple rotating rods (306) on one side and the multiple rotating rods (306) on the other side. A driving plate (308) is fixedly connected to the end of the multiple rotating rods (306) on one side away from the multiple louvers (307). A sliding buckle (309) is fixedly connected to the end of the driving plate (308) on the side away from the multiple louvers (307). A door latch (3010) is rotatably connected to the center of the support frame (301) near the door (204).

7. The coal preparation and testing device according to claim 6, characterized in that: The opening and closing drive mechanism (4) includes a support bar (401) and an electric push rod (402). The support bar (401) is fixedly connected to the upper part of the collection frame (201) near the multiple drive plates (308). The electric push rod (402) is fixedly connected to the side of the collection frame (201) near the support bar (401). A guide groove (403) is provided through the center of the support bar (401) on one side. A guide rail (404) is slidably fitted inside the guide groove (403). 4) A connecting strip (405) is fixedly connected to one side. Multiple movable plates (406) are fixedly connected to the upper center of the connecting strip (405). Limiting slots (407) are opened through the center of the multiple movable plates (406). Multiple sliding buckles (309) are slidably sleeved inside the multiple limiting slots (407). A docking lug (408) is fixedly connected to the lower center of the connecting strip (405). One side of the docking lug (408) is fixedly connected to the output end of the electric push rod (402).

8. The coal preparation and testing device according to claim 3, characterized in that: The screening and detection drive mechanism (5) includes a motor (501), which is fixedly connected to the upper end of the base plate (101) away from the box door (204). The output end of the motor (501) is fixedly connected to a wheel (502). A sleeve (503) is fixedly connected to the upper center of one side of the wheel (502). A transmission arm (504) is rotatably sleeved on the outside of the sleeve (503). The end of the transmission arm (504) away from the sleeve (503) is rotatably connected to the center of the corresponding side of the collection frame (201).

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