Large-size pressed coal cleaning device and method

Abstract

The invention provides a large-size pressed coal cleaning device and method.The large-size pressed coal cleaning device comprises a transfer unit and a lifting unit, the transfer unit comprises a rail and a rail car arranged on the rail in a sliding mode, a cavity groove used for containing a cavity is formed in the rail car, the lifting unit comprises a structural table, and the structural table is supported above the rail through a lifting device; a square window is formed in the position, corresponding to the rail, of the structural table, the square window is matched with the cavity in size, a cutting unit and a positioning unit are arranged on the structural table, the cutting unit comprises a rotating body and a face milling cutter, the face milling cutter is arranged below the square window, the rotating body can drive the face milling cutter to rotate, and the positioning unit is connected with the face milling cutter. And the face milling cutter can be driven to transversely or longitudinally move in the square window. The large-size briquette cleaning device can effectively reduce the labor intensity of cleaning large-size briquettes, greatly improve the cleaning speed and shorten the cleaning time.

Description

Technical Field

[0001] The invention relates to the technical field of shaped coal production, and in particular to a large-size pressed coal cleaning device and method. Background Art

[0002] Regarding the research on coal seam hydraulic fracturing, hydraulic cutting, hydraulic punching, blasting fracturing and other permeability enhancement technologies, physical simulation experiments are an effective research method, considering the limited means of on-site monitoring in coal mines and the difficulty in obtaining effective data, the relevant theories need to be improved, the establishment of constitutive models in numerical simulations and the verification of simulation results. In order to effectively explore the multi-field coupling evolution laws of pressure field, stress field, deformation field, temperature field and other fields in the process of fluid seepage in the coal seam under pressure and pressure relief during the process of coal seam permeability enhancement, it is generally achieved by making coal mold specimens and arranging various sensors inside them. Small-sized coal mold specimens are easy to prepare, but the sensors that can be arranged and the permeability enhancement measures taken are limited. Therefore, the preparation of large-sized coal mold specimens is the basis for related research on coal seam permeability enhancement technology. At present, large-size coal specimens are prepared by pressing and molding, that is, using a specific cavity and a hydraulic servo device to press the coal powder in the cavity into shaped coal specimens through high stress loading in layers. Sensors are arranged in layers during the pressing process, and then coal seam permeability enhancement experiments are carried out. The changes in various physical quantities inside the coal specimens are monitored by sensors.

[0003] The above experimental process has supporting devices available, so the overall workload of the experimenters is not large. However, after each experiment, the coal molds in the cavity need to be cleaned. Since there is no suitable cleaning device to quickly clean it, it can only be cleaned manually, and the whole cleaning process is time-consuming and laborious. Since the coal molds are pressed under high stress and have a certain strength, ordinary small shovels and small spades can no longer clean them. They can only be cleaned gradually by using tools such as awls and hammers, and hammers are used to hit the awls to cause small-scale damage to the coal molds. Large-sized coal mold specimens are generally made of several hundred kilograms of coal powder, so the cleaning work is very cumbersome and time-consuming. Taking a cubic coal mold with a side length of 500 mm as an example, it takes at least 5 hours for two people to clean it together, and the cleaning process is very physically demanding. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention aims to provide a large-sized pressed coal cleaning device and method, so as to reduce the labor intensity of cleaning large-sized pressed coal, increase the cleaning speed and shorten the cleaning time.

[0005] In order to achieve the above-mentioned purpose, the present invention proposes a large-size pressed coal cleaning device, including a transfer unit and a lifting unit, the transfer unit includes a track and a track car slidably arranged on the track, the track car is provided with a cavity groove for placing the cavity, the lifting unit includes a structural platform, the structural platform is supported above the track by a lifting device, a square window is opened at the position corresponding to the track on the structural platform, the size of the square window matches the size of the cavity, a cutting unit and a positioning unit are arranged on the structural platform, the cutting unit includes a rotating body and a face milling cutter, the face milling cutter is arranged below the square window, the rotating body can drive the face milling cutter to rotate, the positioning unit is connected to the face milling cutter, and can drive the face milling cutter to move horizontally or vertically in the square window.

[0006] In the above scheme: the rotating body includes a gyrator, the gyrator is provided with a latching tooth inside, the latching tooth can hold the face milling cutter located below it and drive it to rotate, the lower part of the gyrator is connected to a protective tube, the protective tube is sleeved outside the face milling cutter, the gyrator rotates inside, and the outside does not rotate. The rotating body also includes an external pipeline, which provides power to the gyrator by connecting to a power box.

[0007] In the above scheme: the positioning unit includes a drive device A and a drive device B, the drive device B includes a longitudinally arranged guide rail B, a transversely arranged hydraulic drive B and a slide rail body B, one end of the guide rail B is slidably placed in the slide rail body B, the driving end of the hydraulic drive B is connected to the guide rail B and can drive the guide rail B to move laterally along the slide rail body B; the drive device A includes a transversely arranged guide rail A, a longitudinally arranged hydraulic drive A and a slide rail body A, one end of the guide rail A is slidably placed in the slide rail body A, the driving end of the hydraulic drive A is connected to the guide rail A and can drive the guide rail A to move longitudinally along the slide rail body A, the guide rail A and the guide rail B are distributed on two adjacent sides of the square window, and the guide rail A and the guide rail B are staggered up and down, and the guide rail A and the guide rail B are both provided with a first rail groove along their length direction, and the protective tube is longitudinally penetrated in the upper and lower first rail grooves. The function of the protective tube is to prevent the face milling cutter from contacting the guide rails A and B. When the guide rail B moves laterally, it can drive the protective tube to move laterally, thereby driving the rotator and the face milling cutter to move laterally. When the guide rail A moves longitudinally, it can drive the protective tube to move longitudinally, thereby driving the rotator and the face milling cutter to move longitudinally, thereby enabling the face milling cutter to achieve longitudinal and transverse milling.

[0008] In the above scheme: a free rotating body is rotatably arranged at a corner of the structural platform near the square window, and a secondary telescopic arm is connected to the free rotating body, and the other end of the secondary telescopic arm is movably sleeved on the protection tube and supported at the bottom end of the guide rail A. The secondary telescopic arm plays a supporting role and can perform telescopic movement when the protection tube moves to follow the movement of the protection tube.

[0009] In the above scheme: the structural platform is provided with an inverted L-shaped suspension platform, the inverted L-shaped suspension platform is provided with a second rail groove extending transversely, the end of the guide rail B away from the hydraulic drive B is provided with a T-shaped suspension rod upward, and the top end of the T-shaped suspension rod is slidably connected to the second rail groove through a pulley. The L-shaped suspension platform and the T-shaped suspension rod are combined to play the role of suspending and supporting the guide rail B.

[0010] In the above scheme: the guide rail B is supported at the bottom end of the rotator, and a slide groove is arranged on the top surface of the guide rail B along its length direction. The bottom end of the rotator is slidably connected to the slide groove through a pulley, so as to facilitate the movement of the entire rotating unit along the slide groove of the guide rail B.

[0011] In the above scheme: the third rail groove is provided in the slide rail body A and the slide rail body B along the length direction thereof, and the corresponding ends of the guide rail A and the guide rail B are slidably connected to the corresponding third rail groove through a pulley. The pulley cooperates with the third rail groove to reduce the resistance of the guide rail when it moves inside the slide rail body and direct the movement of the guide rail.

[0012] In the above scheme: the track is a double track extending longitudinally, a plurality of pin holes are provided in the middle position of the two tracks, the pin holes are evenly arranged in the longitudinal direction, the track car is a flatbed car, the cavity groove is opened in the middle of the top surface of the track car, and through holes are also provided at the front and rear ends of the track car corresponding to the middle position of the two tracks, the through holes are equipped with fixing pins, and the fixing pins can pass through the through holes and be inserted into the pin holes to fix the track car on the track, which is easy to operate.

[0013] The present invention also proposes a large-size pressed coal cleaning method. Based on the large-size pressed coal cleaning device, the cleaning method comprises the following steps:

[0014] S1, cavity transfer and fixation;

[0015] After the experiment is completed, the cavity containing the briquette and the sensor is transferred to the cavity slot of the rail car using lifting equipment, and pushed to the bottom of the square window of the structural platform, and then the rail car is fixed on the track.

[0016] S2, the face milling cutter enters the briquette;

[0017] The rotating unit (the movement of the rotating unit can be manually controlled or software controlled) is adjusted to a position close to a corner of the square window, the rotating unit is started, and the face milling cutter enters the coal mold by adjusting the height of the structural table.

[0018] S3, face milling cutter moves to mill coal;

[0019] First, the four sides of the coal mold are milled, and then the coal mold is milled in a grid-like cutting manner to divide the coal mold into several blocks; or the coal molds of the designed milling depth are directly milled into powder.

[0020] S4, stop milling and clean the coal;

[0021] Turn off the rotating unit, stop milling, control the structure table to rise, and remove the milled coal in the cavity; small square coal can be cleaned with a small shovel, and coal powder can be sucked out with a vacuum cleaner.

[0022] S5. Continue to clean the briquette layers;

[0023] The control structure platform descends, and the coal molds and their internal sensors are cleaned layer by layer according to the above steps until the cleaning is completed; the layered cleaning is related to the arrangement of the sensors (the sensors are arranged in layers), that is, the coal molds need to be cleaned in layers according to the position of each sensor, and each layered cleaning needs to meet the following requirements: a sufficient safety distance is left between the face milling cutter and the top surface of the corresponding layer sensor.

[0024] S6, transfer chamber;

[0025] After the coal molds and sensors inside the cavity are cleaned, the rail car is released and pushed to make the cavity leave the structural platform so that it can be hoisted.

[0026] The beneficial effects of the present invention are:

[0027] 1. The device has a simple structure and is easy to produce. It can effectively reduce the labor intensity of cleaning large-sized coal shapes, greatly improve the cleaning speed and reduce the cleaning time. 2. The device is easy to use. By controlling the lifting and lowering of the structure table, the advance and retraction of the face milling cutter can be controlled. It is easy to learn and master, and has high flexibility and can be adjusted according to actual needs. 3. The method of cleaning coal shapes is ingenious. The coal shapes are milled through a grid-like cutting method and are divided into several blocks so that they can be cleaned and shoveled out with an ordinary shovel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 It is a structural schematic diagram of a large-size pressed coal cleaning device.

[0030] Figure 2 It is a schematic diagram of the structure of the cavity.

[0031] Figure 3 It is a schematic diagram of milling grooves on coal briquettes.

[0032] Figure 4 It is a structural diagram of a face milling cutter.

[0033] Figure 5 is an enlarged view of the protection tube.

[0034] Figure 6 This is an enlarged view of the slideway on guide rail B.

[0035] Figure 7 is an enlarged view of the T-type suspension rod.

[0036] Figure 8 It is an enlarged view of the sliding connection between the slide rail body B and the guide rail.

[0037] Fig. 9 yes Figure 2 sectional view of . DETAILED DESCRIPTION

[0038] like Figure 1 —As shown in FIG9 , a large-size pressed coal cleaning device is mainly composed of a transfer unit, a lifting unit, a cutting unit and a positioning unit.

[0039] The transfer unit includes a track 2 and a track car 3 slidably arranged on the track 2. The track car 3 is provided with a cavity slot 26 for placing the cavity 1 (the cavity 1 is pressurized with shaped coal 27). The lifting unit includes a structural platform 4, which is supported above the track 2 by a lifting device 5. The lifting device 5 is 4 hydraulic columns distributed on both sides of the track 2. A square window 6 is opened on the structural platform 4 at the position corresponding to the track 2. The size of the square window 6 matches the size of the cavity 1. Generally, the side length of the square window 6 should be at least 100 mm greater than the side length of the shaped coal 27 inside the cavity 1.

[0040] A cutting unit and a positioning unit are arranged on the structural platform 4. The cutting unit includes a rotating body and a face milling cutter 7. The face milling cutter 7 is arranged below the square window 6. The rotating body can drive the face milling cutter 7 to rotate; the positioning unit is connected to the face milling cutter 7 and can drive the face milling cutter 7 to move horizontally or vertically in the square window 6.

[0041] The face milling cutter 7 consists of a shank with a length of 600-1000 mm, a cutter body with a length of 100 mm and a blade. The diameter of the shank is 10-15 mm; the milling diameter of the blade is 15-20 mm; the end of the cutter body is tapered and provided with a blade, which facilitates the face milling cutter 7 to enter the coal mold 27.

[0042] Preferably, the rotating body includes a rotator 8, the rotator 8 is provided with a latching tooth inside, the latching tooth can hold the face milling cutter 7 located below it and drive it to rotate, the lower part of the rotator 8 is connected to a protective tube 9, the protective tube 9 is sleeved outside the face milling cutter 7, the rotator 8 rotates inside, and the outside does not rotate. The rotating body also includes an external pipeline, which provides power to the rotator 8 by connecting to a power box.

[0043] Preferably, the positioning unit comprises a drive device A and a drive device B.

[0044] The driving device B includes a longitudinally arranged guide rail B10, a transversely arranged hydraulic drive B11 and a slide rail body B12. One end of the guide rail B10 is slidably placed in the slide rail body B12. The driving end of the hydraulic drive B11 is connected to the guide rail B10 and can drive the guide rail B10 to move laterally along the slide rail body B12.

[0045] The driving device A includes a transversely arranged guide rail A13, a longitudinally arranged hydraulic drive A14 and a slide rail body A15. One end of the guide rail A13 is slidably placed in the slide rail body A15. The driving end of the hydraulic drive A14 is connected to the guide rail A13 and can drive the guide rail A13 to move longitudinally along the slide rail body A15.

[0046] The guide rails A13 and B10 are distributed on two adjacent sides of the square window 6, and the guide rails A13 and B10 are staggered up and down. The guide rails A13 and B10 are both provided with first rail grooves 16 along their length direction, and the protection tube 9 is longitudinally penetrated in the upper and lower first rail grooves 16. The function of the protection tube 9 is to prevent the face milling cutter 7 from contacting the guide rails A13 and B10. When the guide rail B10 moves horizontally, it can drive the protection tube 9 to move horizontally, thereby driving the rotator 8 and the face milling cutter 7 to move horizontally. When the guide rail A13 moves longitudinally, it can drive the protection tube 9 to move longitudinally, thereby driving the rotator 8 and the face milling cutter 7 to move longitudinally, thereby enabling the face milling cutter 7 to achieve longitudinal and transverse milling.

[0047] The plane on which the rotating unit can move is the plane covered by the two mutually perpendicular guide rails by moving their first rail grooves 16. This plane should be smaller than the area of ​​the square window 7. Therefore, the length of the first rail groove 16 should be smaller than the side length of the square window 7 110 mm, that is, smaller than 10 mm of the side of the coal mold 27 in the cavity 1.

[0048] Preferably, a free-rotating body 17 is rotatably provided at a corner of the structural platform 4 near the square window 6, and a secondary telescopic arm 18 is connected to the free-rotating body 17. The other end of the secondary telescopic arm 18 is movably sleeved on the protection tube 9 and supported at the bottom end of the guide rail A13. The secondary telescopic arm 18 plays a supporting role and can perform telescopic movement when the protection tube 9 moves to follow the movement of the protection tube 9.

[0049] Preferably, an inverted L-shaped suspension platform 19 is provided on the structural platform 4, and a second rail groove extending transversely is provided on the inverted L-shaped suspension platform 19, and a T-shaped suspension rod 21 is provided upward at one end of the guide rail B10 away from the hydraulic drive B11, and the top end of the T-shaped suspension rod 21 is slidably connected to the second rail groove through a pulley. The L-shaped suspension platform 19 and the T-shaped suspension rod 21 are combined to play the role of suspending and supporting the guide rail B10.

[0050] Preferably, the guide rail B10 is supported at the bottom end of the rotator 8, a slide groove 22 is provided on the top surface of the guide rail B10 along its length direction, and the bottom end of the rotator 8 is slidably connected to the slide groove 22 through a pulley, so as to facilitate the movement of the entire rotating unit along the slide groove 22 of the guide rail B10.

[0051] Preferably, the slide rail body A15 and the slide rail body B12 are both provided with a third rail groove 23 along their length direction, and the corresponding ends of the guide rail A13 and the guide rail B10 are slidably connected to the corresponding third rail groove 23 through pulleys. The pulley cooperates with the third rail groove 23 to reduce the resistance of the guide rail when it moves inside the slide rail body and to orient the movement of the guide rail.

[0052] Preferably, the track 2 is a double track extending longitudinally, a plurality of pin holes 24 are provided in the middle of the two tracks 2, the pin holes 24 are evenly arranged in the longitudinal direction, the distance between adjacent pin holes 24 is 100-200 mm, the track vehicle 3 is a flatbed vehicle, the cavity groove 26 is opened in the middle of the top surface of the track vehicle 3, and a through hole 20 is further provided at the front and rear ends of the track vehicle 3 corresponding to the middle of the two tracks 2, the through hole 20 is equipped with a fixing pin 25, and the fixing pin 25 can pass through the through hole 20 and be inserted into the pin hole 24 to fix the track vehicle 3 on the track 2, which is easy to operate.

[0053] A large-sized pressed coal cleaning method is based on the large-sized pressed coal cleaning device, and the cleaning method comprises the following steps:

[0054] S1, cavity transfer and fixation;

[0055] After the experiment is completed, the chamber 1 containing the briquette 27 and the sensor 28 is transferred to the chamber slot of the rail car 3 by using the lifting equipment, and pushed to the bottom of the square window 6 of the structure platform 4, and then the rail car 3 is fixed on the track 2 by the fixing pin 25. If the height of the structure platform 4 is not enough for the chamber 1 to move directly under it, the structure platform 4 can be raised first.

[0056] S2, the face milling cutter enters the briquette;

[0057] Adjust the rotating unit (the movement of the rotating unit can be manually controlled or software controlled) to a position (initial position) close to a corner of the square window 6, start the rotating unit, and adjust the height of the structural table 4 so that the face milling cutter 7 enters the coal mold 27, the depth of which is generally 5-10 cm, depending on the position of the sensor 28 arranged inside the coal mold 27.

[0058] S3, face milling cutter moves to mill coal;

[0059] First, the coal mold 27 is milled around, and then the coal mold 27 is milled in a grid-like cutting manner to divide the coal mold 27 into several blocks with a side length of about 50-100 mm, so that it can be cleaned with an ordinary shovel; or the coal mold 27 of the designed milling depth is directly milled into powder.

[0060] S4, stop milling and clean the coal;

[0061] The rotating unit is turned off, and the control structure table 4 is raised. The experimenter uses a small shovel or other tool to remove the milled coal 27 in the cavity 1. The small square coal 27 can be cleaned with a small shovel, and the coal powder can be sucked out with a vacuum cleaner.

[0062] S5. Continue to clean the briquette layers;

[0063] The control structure platform 4 descends, and the briquette 27 and the internal sensors 28 are cleaned layer by layer according to the above steps until the cleaning is completed. The layered cleaning is related to the arrangement of the sensors 28 (the sensors 28 are arranged in layers), that is, the briquette 27 needs to be cleaned in layers according to the positions of the sensors 28, and each layered cleaning needs to meet the following requirements: a sufficient safety distance is left between the face milling cutter and the top surface of the corresponding layer sensor 28.

[0064] Take the cavity 1 with a size of 800×800×800mm and the internal coal mold 27 with a size of 500×500×500mm as an example. The first layer of sensors is 100mm away from the top of the coal mold 27. Assuming that the diameter of the sensor 28 is 5mm and its center is in line with the center of the measure hole 29, the distance between the top of the sensor 28 and the top surface of the coal mold 27 is 95mm. To ensure safety, a safety distance of not less than 5mm is reserved. The distance that the face milling cutter 7 penetrates into the coal mold 27 can be set to 90mm at one time. After meshing the coal mold 27 or completing all cutting according to the corresponding steps, use a small shovel or dust suction device to clean up the small pieces of coal mold 27 or coal powder shoveled off. Then gradually remove the first layer of sensors; the second layer of sensors is 150mm away from the first layer of sensors, so the top of the second layer of sensors is 150mm away from the top surface of the remaining shaped coal 27 after the first cleaning of the shaped coal 27, leaving a 5mm safety distance, that is, the face milling cutter 7 needs to cut the shaped coal 27 with a depth of 145mm this time. If the maximum cutting depth of the face milling cutter 7 is 100mm, it can be cut twice, one time with a cutting depth of 75mm, and one time with a cutting depth of 70mm; this cycle is repeated until the third layer of sensors is removed. The remaining shaped coal 27 with a depth of about 110mm can still be cut twice, or 100mm can be cut at one time, but it is necessary to ensure that the safety distance between the inner wall of the cavity 1 and the face milling cutter 7 is not less than 5mm.

[0065] In actual application, if the hardness coefficient of the coal 27 is relatively large and the cutting depth of the face milling cutter 7 is limited at one time, the cutting depth of the face milling cutter 7 can be reduced each time.

[0066] S6, transfer chamber;

[0067] After the cleaning of the coal 27 and the sensor 28 inside the cavity 1 is completed, the fixing pin 25 is taken out to release the fixation of the rail car 3, and the rail car 3 is pushed so that the cavity 1 leaves the structural platform 4 so as to be hoisted.

Claims

1. A large-size pressed coal cleaning device, characterized in that: The invention comprises a transfer unit and a lifting unit, wherein the transfer unit comprises a track (2) and a track vehicle (3) slidably arranged on the track (2), wherein the track vehicle (3) is provided with a cavity groove (26) for placing a cavity (1), wherein the lifting unit comprises a structural platform (4), wherein the structural platform (4) is supported above the track (2) by a lifting device (5), wherein a square window (6) is provided on the structural platform (4) at a position corresponding to the track (2), wherein the size of the square window (6) matches the size of the cavity (1), wherein a cutting unit and a positioning unit are arranged on the structural platform (4), wherein the cutting unit comprises a rotating body and a face milling cutter (7), wherein the face milling cutter (7) is arranged below the square window (6), wherein the rotating body can drive the face milling cutter (7) to rotate, and wherein the positioning unit is connected to the face milling cutter (7) and can drive the face milling cutter (7) to move horizontally or vertically in the square window (6).

2. The large-size pressed coal cleaning device according to claim 1 is characterized in that: The rotating body comprises a rotator (8), wherein the rotator (8) is provided with latching teeth inside, and the latching teeth can hold the face milling cutter (7) located below it and drive it to rotate; the lower part of the rotator (8) is connected with a protective tube (9), and the protective tube (9) is loosely sleeved outside the face milling cutter (7).

3. The large-size pressed coal cleaning device according to claim 2 is characterized in that: The positioning unit includes a driving device A and a driving device B; The driving device B comprises a longitudinally arranged guide rail B (10), a transversely arranged hydraulic drive B (11) and a slide rail body B (12). One end of the guide rail B (10) is slidably placed in the slide rail body B (12). The driving end of the hydraulic drive B (11) is connected to the guide rail B (10) and can drive the guide rail B (10) to move transversely along the slide rail body B (12). The driving device A comprises a transversely arranged guide rail A (13), a longitudinally arranged hydraulic drive A (14) and a slide rail body A (15), one end of the guide rail A (13) is slidably placed in the slide rail body A (15), the driving end of the hydraulic drive A (14) is connected to the guide rail A (13) and can drive the guide rail A (13) to move longitudinally along the slide rail body A (15), the guide rail A (13) and the guide rail B (10) are distributed on two adjacent sides of the square window (6), and the guide rail A (13) and the guide rail B (10) are staggered up and down, and the guide rail A (13) and the guide rail B (10) are both provided with a first rail groove (16) along their length direction, and the protective tube (9) is longitudinally penetrated in the upper and lower first rail grooves (16).

4. The large-size pressed coal cleaning device according to claim 3 is characterized in that: A free-rotating body (17) is rotatably arranged at a corner of the structural platform (4) near the square window (6), and a secondary telescopic arm (18) is connected to the free-rotating body (17). The other end of the secondary telescopic arm (18) is movably sleeved on the protective tube (9) and supported on the bottom end of the guide rail A (13).

5. The large-size pressed coal cleaning device according to claim 3 is characterized in that: An inverted L-shaped suspension platform (19) is arranged on the structural platform (4), and a second rail groove extending transversely is arranged on the inverted L-shaped suspension platform (19). An end of the guide rail B (10) away from the hydraulic drive B (11) is upwardly provided with a T-shaped suspension rod (21), and the top end of the T-shaped suspension rod (21) is slidably connected to the second rail groove via a pulley.

6. The large-size pressed coal cleaning device according to claim 5, characterized in that: The guide rail B (10) is supported at the bottom end of the rotator (8), a slide groove (22) is provided on the top surface of the guide rail B (10) along its length direction, and the bottom end of the rotator (8) is slidably connected to the slide groove (22) via a pulley.

7. The large-size pressed coal cleaning device according to claim 3 is characterized in that: The slide rail body A (15) and the slide rail body B (12) are both provided with a third rail groove (23) along their length direction, and the corresponding ends of the guide rail A (13) and the guide rail B (10) are slidably connected to the corresponding third rail groove (23) through pulleys.

8. The large-size pressed coal cleaning device according to claim 3 is characterized in that: The track (2) is a double track extending longitudinally, a plurality of pin holes (24) are arranged at the middle positions of the two tracks (2), and the pin holes (24) are evenly arranged in the longitudinal direction. The track vehicle (3) is a flatbed vehicle, and the cavity groove (26) is opened in the middle of the top surface of the track vehicle (3). The front and rear ends of the track vehicle (3) are also provided with through holes (20) corresponding to the middle positions of the two tracks (2), and the through holes (20) are equipped with fixing pins (25), and the fixing pins (25) can pass through the through holes (20) and be inserted into the pin holes (24) to fix the track vehicle (3) on the track (2).

9. A method for cleaning large-sized pressed coal, characterized in that: Based on the large-size pressed coal cleaning device according to any one of claims 1 to 8 above, the cleaning method comprises the following steps: S1, cavity transfer and fixation; After the experiment is completed, the chamber (1) containing the briquette (27) and the sensor (28) is transferred to the chamber slot of the rail car (3) by using a lifting device, and pushed to the bottom of the square window (6) of the structural platform (4), and then the rail car (3) is fixed on the track (2); S2, the face milling cutter enters the briquette; The rotating unit is adjusted to a position close to a corner of the square window (6), the rotating unit is started, and the height of the structural table (4) is adjusted so that the face milling cutter (7) enters the coal mold (27); S3, face milling cutter moves to mill coal; First, the coal mold (27) is milled around its periphery, and then the coal mold (27) is milled in a grid-like cutting manner to divide the coal mold (27) into a plurality of blocks; S4, stop milling and clean the coal; The rotating unit is turned off, and the control structure platform (4) is raised to remove the milled coal briquettes (27) in the cavity (1); S5. Continue to clean the briquette layers; The control structure platform (4) is lowered, and the briquette (27) and the sensor (28) therein are cleaned layer by layer according to the above steps until the cleaning is completed; S6, transfer chamber; After the cleaning of the coal molds (27) and the sensor (28) inside the cavity (1) is completed, the fixing of the rail car (3) is released and the rail car (3) is pushed so that the cavity (1) leaves the structural platform (4) so ​​as to be hoisted.

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