Coal unloading machine conveyor belt coal powder scraping device

Abstract

The application discloses a coal unloading machine conveying belt coal powder scraping device, which comprises a base, the base is provided with a sliding groove, a sliding block is sealingly and slidably connected in the sliding groove, a U-shaped block is fixedly connected to the upper surface of the sliding block, and a pressure adjusting mechanism is arranged on the U-shaped block; the pressure adjusting mechanism comprises fixed plates a and b, the fixed plates a and b are fixedly connected to the two inner side walls opposite to the U-shaped block respectively, a cleaning cylinder is rotatably connected to the fixed plates a and b through bearings, a gear ring is rotatably connected to the inner side wall of the cleaning cylinder through a bearing, an installation groove is formed in the inner side wall of the cleaning cylinder, and a push block is slidably connected in the installation groove. The application has the advantages that the conveying belt can be cleaned at the same time, the friction force between the cleaning cylinder and the conveying belt can be automatically monitored, the friction force can be automatically adjusted according to the friction force, the degree of automation is higher, dust can be absorbed during cleaning, and environmental pollution is avoided.

Description

Technical Field

[0001] This invention relates to the field of coal conveying technology, and in particular to a coal powder scraping device for a coal unloading machine conveyor belt. Background Technology

[0002] Coal is a solid combustible mineral formed gradually from ancient plants buried underground through complex biochemical and physicochemical changes. After being mined, coal requires various processing steps to separate the raw coal into different products for different uses. After being unloaded by a coal unloader, the coal is generally transported to different processing stations via conveyor belts for further processing. During the conveyor belt transportation process, coal dust often adheres to the conveyor belt, especially with coke and coal, where material adhesion to the belt surface is particularly severe. A large amount of coal adhering to the conveyor belt surface not only contaminates subsequently transported coal but also increases the weight of the conveyor belt itself, thus increasing its load. Therefore, during coal transportation, scraping devices are often used to remove the coal dust adhering to the conveyor belt.

[0003] In existing technologies, scraping devices typically use a rotating cleaning cylinder. The friction between the cleaning cylinder and the conveyor belt scrapes off the attached coal dust, thus ensuring the cleanliness of the conveyor belt surface. However, the friction between the cleaning cylinder and the conveyor belt is generally fixed. When cleaning the coal dust layer, too little friction may result in incomplete cleaning, while too much friction can easily damage the conveyor belt. The friction is not adjustable, making it inconvenient to use. Furthermore, during the cleaning process, coal dust flies everywhere, polluting the environment and affecting the health of processing personnel. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art by proposing a coal powder scraping device for the conveyor belt of a coal unloading machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a coal powder scraping device for a coal unloading machine conveyor belt, including a base, the base having a sliding groove, a slider being slidably connected in the sliding groove, a U-shaped block being fixedly connected to the upper surface of the slider, and a pressure regulating mechanism being provided on the U-shaped block;

[0006] The pressure regulating mechanism includes a fixed plate a and a fixed plate b, which are fixedly connected to the two inner sidewalls of the U-shaped block respectively. A cleaning cylinder is rotatably connected to the fixed plates a and b via bearings. A gear ring is rotatably connected to the inner sidewall of the cleaning cylinder via bearings. An installation groove is provided on the inner sidewall of the cleaning cylinder, and a push block is slidably connected within the installation groove. A force-sensitive resistor is fixedly connected to the inner end wall of the installation groove. The push block is fixedly connected to the gear ring, which is driven by a driving assembly. A functional cavity is provided within the U-shaped block, and an electromagnet is fixedly connected to the inner end wall of the functional cavity. The electromagnet is electrically connected to the force-sensitive resistor via a wire. A conductive block is slidably connected within the functional cavity. The conductive block is a hollow structure with a permanent magnet slidably connected inside. Several second springs are fixedly connected between the permanent magnet and the inner wall of the conductive block. Two conductive plates are fixedly embedded in the inner sidewall of the functional cavity. The conductive plates and the conductive block are jointly connected to an regulating assembly.

[0007] In the aforementioned coal unloading machine conveyor belt coal powder scraping device, the adjusting component includes an adjusting motor, which is fixedly connected to the side wall of the base. The conductive sheet, conductive block, and adjusting motor are electrically connected via wires. The base has a liquid chamber that communicates with a sliding groove. A pump plate is slidably connected and sealed inside the liquid chamber. Hydraulic oil is filled between the pump plate and the slider. A threaded cylinder is rotatably connected to the base via a bearing. One end of the threaded cylinder extends into the liquid chamber, and the other end extends outside the base. A screw is threadedly connected to the threaded cylinder. One end of the screw located inside the liquid chamber is fixedly connected to the side wall of the pump plate. A driven gear is interference-fitted to the threaded cylinder. A drive gear is fixedly connected to the output shaft of the adjusting motor, and the drive gear meshes with the driven gear.

[0008] In the aforementioned coal unloading machine conveyor belt coal powder scraping device, the drive assembly includes a drive motor. The drive motor is fixedly connected to the side wall of the U-shaped block via a bracket. The output end of the drive motor is fixedly connected to a main shaft. The main shaft is rotatably connected to the U-shaped block and the fixed plate a via bearings and extends into the cleaning cylinder. A main gear is interference-fitted to a section of the main shaft inside the cleaning cylinder. Multiple auxiliary gears are rotatably connected to the side wall of the fixed plate a inside the cleaning cylinder via bearings. The auxiliary gears mesh with the main gear and the gear ring.

[0009] In the aforementioned coal unloading machine conveyor belt coal powder scraping device, a dust collection mechanism is provided at the U-shaped block. The dust collection mechanism includes a dust storage box with a U-shaped cross-section and an opening facing one side. The dust storage box is fixedly connected to the upper surface of the base. A filter bag is fixedly connected to the inner wall of the dust storage box. The U-shaped block and the fixed plate b are connected through a dust inlet pipe. One end of the dust inlet pipe extends through into the cleaning cylinder, and the other end is fixedly connected through to the top wall of the dust storage box and extends to engage with it. The main shaft is interference-fitted with a dust collection fan. A dust collection hood is fixedly connected to the end of the dust inlet pipe located inside the cleaning cylinder. The cleaning cylinder has several dust collection holes.

[0010] In the above-mentioned coal unloading machine conveyor belt coal powder scraping device, the side wall of the fixed plate a is provided with an annular groove, and a connecting block is slidably connected in the annular groove. The connecting block is fixedly connected to the side wall of the gear ring, and the cross-section of the connecting block and the annular groove are both T-shaped.

[0011] In the above-mentioned coal dust scraping device for the coal unloading machine conveyor belt, the dust collection hood is fixedly connected to a support block by a rod, the main shaft is rotatably connected to the side wall of the support block by a bearing, and a filter screen is fixedly connected to the inner side wall of the cleaning cylinder.

[0012] In the above-mentioned coal unloading machine conveyor belt coal powder scraping device, the top wall and bottom wall of the functional cavity are provided with limiting grooves. The functional cavity is slidably connected to the conductive block through the limiting grooves. A first spring is fixedly connected between the conductive block and the inner wall of the functional cavity.

[0013] Compared with existing technologies, the advantages of this invention are:

[0014] 1. The toothed ring rotates, and the pusher pushes the cleaning cylinder to rotate, thereby cleaning the conveyor belt. The magnitude of the pushing force of the pusher pushing the cleaning cylinder to rotate represents the magnitude of the friction between the cleaning cylinder and the conveyor belt. This force is sensed by a force-sensitive resistor, so that the friction between the cleaning cylinder and the conveyor belt can be monitored at all times during the cleaning process.

[0015] 2. After monitoring the friction force, the change in the resistance of the force-sensitive resistor is used to control the change in the resistance of the electromagnet. When the friction force is not within the normal range, either too high or too low, the regulating motor will rotate. Through the meshing of the drive gear and the driven gear, the screw cylinder will rotate, and the pump plate will slide through the screw, thereby adjusting the height of the cleaning cylinder and thus the pressure between the cleaning cylinder and the conveyor belt. This adjusts the friction force, allowing the friction force between the two to be freely adjusted, effectively avoiding damage to the conveyor belt due to excessive friction force and incomplete cleaning due to insufficient friction force.

[0016] 3. By monitoring the friction force, the friction force is automatically adjusted, eliminating the need for manual adjustment, thus increasing the automation level of the device and making it more convenient to use;

[0017] 4. While the cleaning cylinder removes coal dust, the drive component causes the vacuum fan to rotate, and the direction of its rotation is always opposite to that of the cleaning cylinder. The rotation of the vacuum fan pumps the air in the cleaning cylinder into the dust collection box, thereby creating negative pressure inside the cleaning cylinder. The dust generated during cleaning is then directly sucked into the cleaning cylinder through the suction hole, preventing it from flying and polluting the environment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a coal powder scraping device for a coal unloading machine conveyor belt proposed in this invention;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0020] Figure 3 for Figure 1 Enlarged view of point B in the image;

[0021] Figure 4 for Figure 1 Enlarged view of point C in the image;

[0022] Figure 5 for Figure 1 Partial cross-sectional view at DD in the middle;

[0023] Figure 6 for Figure 1 Partial cross-sectional view of EE in the image;

[0024] Figure 7 This is a schematic diagram of the circuit connection of the adjusting component in the coal powder scraping device of the coal unloading machine conveyor belt proposed in this invention.

[0025] In the diagram: 1. Base, 2. Sliding groove, 3. Slider, 4. U-shaped block, 5. Fixing plate a, 6. Fixing plate b, 7. Cleaning cylinder, 8. Dust suction hole, 9. Main shaft, 10. Drive motor, 11. Main gear, 12. Secondary gear, 13. Gear ring, 14. Push block, 15. Mounting groove, 16. Force-sensitive resistor, 17. Annular groove, 18. Connecting block, 19. Functional cavity, 20. Electromagnet, 21. Conductive block, 22. Limiting groove, 23. First spring, 24. Permanent magnet, 25. Second spring, 26. Conductive sheet, 27. Liquid cavity, 28. Pump plate, 29. Hydraulic oil, 30. Threaded cylinder, 31. Screw, 32. Adjusting motor, 33. Drive gear, 34. Driven gear, 35. Protective plate, 36. Dust inlet pipe, 37. Dust collection box, 38. Filter bag, 39. Dust collection hood, 40. Support block, 41. Dust suction fan, 42. Filter screen. Detailed Implementation

[0026] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0027] Example

[0028] Reference Figure 1-7 A coal powder scraping device for a coal unloading machine conveyor belt includes a base 1, a sliding groove 2 is provided on the base 1, a slider 3 is slidably connected in the sliding groove 2, a U-shaped block 4 is fixedly connected to the upper surface of the slider 3, and a pressure regulating mechanism is provided on the U-shaped block 4.

[0029] The pressure regulating mechanism includes a fixed plate a5 and a fixed plate b6, which are fixedly connected to the two inner sidewalls opposite to the U-shaped block 4. A cleaning cylinder 7 is rotatably connected to the fixed plates a5 and b6 via bearings. A cleaning layer is attached to the outer wall of the cleaning cylinder 7. A gear ring 13 is rotatably connected to the inner sidewall of the cleaning cylinder 7 via bearings. An installation groove 15 is provided on the inner sidewall of the cleaning cylinder 7. A push block 14 is slidably connected within the installation groove 15. A force-sensitive resistor 16 is fixedly connected to the inner end wall of the installation groove 15. The resistance of the force-sensitive resistor 16 increases with increasing pressure. The U-shaped block 4 is large and small. Push block 14 is fixedly connected to gear ring 13, which is driven by a drive assembly. A functional cavity 19 is provided inside the U-shaped block 4. An electromagnet 20 is fixedly connected to the inner wall of the functional cavity 19. The electromagnet 20 is electrically connected to a force-sensitive resistor 16 via a wire. A conductive block 21 is slidably connected inside the functional cavity 19. The conductive block 21 is made of aluminum alloy, ensuring good conductivity while remaining unaffected by the magnetic force of the electromagnet 20. The conductive block 21 has a hollow structure and a permanent magnet 24 is slidably connected inside. The electromagnet 20... The electric current generates a magnetic repulsion force on the permanent magnet 24. Several second springs 25 are fixedly connected between the permanent magnet 24 and the inner wall of the conductive block 21. By placing the permanent magnet 24 inside the conductive block 21 and using the second springs 25, the sudden increase in the magnetic force of the electromagnet 20 when encountering large clumps of coal powder is avoided, preventing the conductive block 21 from suddenly moving. Two conductive plates 26 are fixedly embedded in the inner wall of the functional cavity 19. The conductive plates 26 and the conductive block 21 are connected to an adjustment assembly. Rotation of the gear ring 13 pushes the cleaning cylinder 7 to rotate via the push block 14, thereby cleaning... The rotation of the cylinder 7 cleans the conveyor belt. When pushing, the pushing force of the pusher 14 to push the cleaning cylinder 7 to rotate consists of the force required for the cleaning cylinder 7 to rotate itself and the frictional force on the cleaning cylinder 7. Since the force required for the cleaning cylinder 7 to rotate itself is fixed, the magnitude of the pushing force is determined by the frictional force between the cleaning cylinder 7 and the conveyor belt. This force is sensed by the force-sensitive resistor 16, so that during the cleaning process, the force-sensitive resistor 16 can monitor the frictional force between the cleaning cylinder and the conveyor belt at all times, and automatically adjust the frictional force based on the monitoring results.

[0030] It is worth mentioning that by monitoring the friction force and automatically adjusting it, no manual adjustment is required, making the device more automated and easier to use.

[0031] The adjustment assembly includes an adjustment motor 32. Both the adjustment motor 32 and the drive motor 10 are servo motors, which can freely control their speed and direction of rotation. This is existing technology. The adjustment motor 32 is fixedly connected to the side wall of the base 1. The conductive sheet 26, the conductive block 21, and the adjustment motor 32 are electrically connected by wires, as shown in the diagram. Figure 7 As shown, when the conductive block 21 contacts different conductive sheets 26, the motor 32 can be supplied with electricity in different directions, thus causing it to rotate in different directions. The base 1 has a liquid chamber 27, which is connected to the sliding groove 2. A pump plate 28 is slidably connected inside the liquid chamber 27. Hydraulic oil 29 is filled between the pump plate 28 and the slider 3. The contact area between the pump plate 28 and the hydraulic oil 29 is smaller than the contact area between the slider 3 and the hydraulic oil 29, making the hydraulic transmission smoother. Since the hydraulic oil 29 cannot be compressed, its pressure is equal everywhere. Since P=F / S, that is, the larger the area, the greater the pressure, a smaller force at the pump plate 28 can generate a larger force at the slider 3. A threaded cylinder 30 is rotatably connected to the base 1 through a bearing. One end of the threaded cylinder 30 extends into the liquid chamber 27, and the other end extends into the outside of the base 1. The threaded cylinder 30 is threadedly connected to the screw 31. The end of the screw 31 located in the liquid chamber 27 is fixedly connected to the side wall of the pump plate 28. The threaded cylinder 30 is interference-fitted with the driven gear 34. The output shaft of the adjusting motor 32 is fixedly connected to the drive gear 33. The drive gear 33 meshes with the driven gear 34. When adjusting the friction force, the conductive block 21 contacts different conductive plates 26, causing the adjusting motor 32 to rotate in different directions. Then, through the threaded connection between the threaded cylinder 30 and the screw 31, the pump plate 28 moves. The hydraulic oil causes the slider 3 to move, thereby adjusting the height of the cleaning cylinder 7, and thus adjusting the pressure between the cleaning cylinder 7 and the conveyor belt, and adjusting the friction force.

[0032] The drive assembly includes a drive motor 10, which is fixedly connected to the side wall of the U-shaped block 4 via a bracket. The output end of the drive motor 10 is fixedly connected to a main shaft 9. The main shaft 9 is rotatably connected to the U-shaped block 4 and the fixed plate a5 via bearings and extends into the cleaning cylinder 7. A main gear 11 is interference-fitted to a section of the main shaft 9 inside the cleaning cylinder 7. Multiple auxiliary gears 12 are rotatably connected to the side wall of the fixed plate a5 inside the cleaning cylinder 7 via bearings. The auxiliary gears 12 mesh with the main gear 11 and the gear ring 13. The main gear 11, auxiliary gears 12, and gear ring 13 form a planetary gear system. Driven by the planetary gears, the cleaning cylinder 7 rotates, and the vacuum fan 41 rotates simultaneously. This allows only one motor to complete the cleaning of the conveyor belt and the removal of cleaning powder, making the device more efficient.

[0033] A dust collection mechanism is installed at the U-shaped block 4. The dust collection mechanism includes a dust collection box 37 with a U-shaped cross-section and an opening facing one side. The dust collection box 37 is fixedly connected to the upper surface of the base 1. A filter bag 38 is fixedly connected to the inner wall of the dust collection box 37. A dust inlet pipe 36 is fixedly connected to the U-shaped block 4 and the fixing plate b6. One end of the dust inlet pipe 36 extends into the cleaning cylinder 7, and the other end is fixedly connected to the top wall of the dust collection box 37 and extends to engage with it. A vacuum fan 41 is interference-fitted to the main shaft 9. A dust collection hood 39 is fixedly connected to the end of the dust inlet pipe 36 located inside the cleaning cylinder 7. The cleaning cylinder 7 is open. The device has several suction holes 8 and is connected to a planetary gear system consisting of a main gear 11, a secondary gear 12, and a gear ring 13. According to the working principle of planetary gears, the main gear 11 and the gear ring 13 rotate in opposite directions. This allows the main shaft 9 to drive the gear ring 13 and the cleaning cylinder 7 to rotate simultaneously, while also driving the suction fan 41 to rotate. The rotation of the suction fan 41 pumps the air in the cleaning cylinder 7 into the dust collection box 37, thereby creating a negative pressure inside the cleaning cylinder 7. The dust generated during cleaning is then directly sucked into the cleaning cylinder through the suction holes 8, preventing it from flying and polluting the environment.

[0034] The side wall of the fixed plate a has an annular groove 17, and a connecting block 18 is slidably connected in the annular groove 17. The connecting block 18 is fixedly connected to the side wall of the gear ring 13. The cross-section of the connecting block 18 and the annular groove 17 is T-shaped. The sliding connection between the T-shaped annular groove 17 and the connecting block 18 is more stable, preventing the connecting block 18 from sliding out of the annular groove 17.

[0035] The dust collection hood 39 is fixedly connected to the support block 40 by a rod. The main shaft 9 is rotatably connected to the side wall of the support block 40 by a bearing. The support block 40 provides a certain support for the main shaft 9, ensuring the smooth rotation of the main shaft 9. The inner side wall of the cleaning cylinder 7 is fixedly connected to the filter screen 42. The filter screen 42 is set to prevent the sucked coal dust from flying to the main gear 11 and the auxiliary gear 12, which would affect the meshing between them.

[0036] Limiting grooves 22 are provided on the top and bottom walls of the functional cavity 19. The functional cavity 19 is slidably connected to the conductive block 21 through the limiting grooves 22. A first spring 23 is fixedly connected between the conductive block 21 and the inner wall of the functional cavity 19.

[0037] In this invention, during the conveyor belt conveying process, the cleaning cylinder 7 comes into contact with the conveyor belt, and the drive motor 10 is turned on. The drive motor 10 drives the main shaft 9 to rotate, and the rotation of the main shaft 9 drives the main gear 11 which is interference-fitted with it. The main gear 11 then drives the gear ring 13 to rotate through the secondary gear 12. When the gear ring 13 rotates, it drives the push block 14 to rotate. The push block 14 pushes the cleaning cylinder 7 to rotate. Through the friction between the cleaning cylinder 7 and the conveyor belt, the coal powder on the conveyor belt is scraped off.

[0038] While the main shaft 9 rotates, it also drives the vacuum fan 41 to rotate in the opposite direction to the rotation of the cleaning cylinder 7. The rotation of the vacuum fan 41 pumps the air in the cleaning cylinder 7 into the dust collection box 37, thereby creating a negative pressure in the cleaning cylinder 7. The dust generated during cleaning is directly sucked into the cleaning cylinder through the suction hole 8. The scraped coal dust is sucked into the dust collection box 37, filtered through the filter bag 38, and then the clean air is discharged.

[0039] While scraping off coal dust, the friction between the conveyor belt and the cleaning cylinder 7 is monitored by the force-sensitive resistor 16. The pushing force of the pusher block 14 to rotate the cleaning cylinder 7 consists of the force required for the cleaning cylinder 7 to rotate and the friction force on the cleaning cylinder 7. Since the force required for the cleaning cylinder 7 to rotate is fixed, the pushing force is determined by the friction force between the cleaning cylinder 7 and the conveyor belt. This force is sensed by the force-sensitive resistor 16, so that the friction force between the cleaning cylinder and the conveyor belt can be monitored at all times during the cleaning process.

[0040] When the force-sensitive resistor 16 monitors friction, if the friction is too great, the pressure on the force-sensitive resistor 16 will be greater, thus reducing its resistance. This decrease in resistance causes a corresponding increase in the magnetic force of the electromagnet 20 connected to it. The increased magnetic force of the electromagnet 20 increases the magnetic repulsion force on the permanent magnet 24, causing the permanent magnet 24 to slide the conductive block 21 to the right until it contacts the conductive plate 26 on the right. At this point, the regulating motor 32 is energized and begins to rotate. The rotation of the regulating motor 32 drives the drive gear 33 to rotate, thereby causing the driven gear meshing with the drive gear 33 to rotate. When gear 34 rotates, the driven gear 34 drives the threaded cylinder 30 to rotate. The rotation of the threaded cylinder 30, through its threaded connection with the screw 31, causes the screw 31 to drive the pump plate 28 to slide to the left. This causes the hydraulic oil 29 in the sliding groove 2 to be drawn into the liquid chamber 27, thereby lowering the position of the slider 3 and causing the position of the U-shaped block 4 to drop. This reduces the pressure between the cleaning cylinder 7 and the conveyor belt, reducing their friction until the friction is adjusted to the normal value. At this point, the pressure on the force-sensitive resistor 16 causes the conductive block 21 to be positioned between the two conductive plates 26. At this point, the adjusting motor 32 is de-energized and stops rotating, and the friction is at the normal value.

[0041] Conversely, if the friction is too small, the change in the resistance of the force-sensitive resistor 16 causes a change in the magnetic force of the electromagnet 20, which in turn causes the conductive block 21 to contact the conductive plate 26 on the left side. This causes the regulating motor 32 to be energized in the reverse direction and rotate in the reverse direction, thereby causing the pump plate 28 to move to the right and pump hydraulic oil into the sliding groove 2. This causes the slider 3 to rise, increasing the pressure between the cleaning cylinder 7 and the conveyor belt, and thus increasing the friction. By monitoring and adjusting the friction, the cleaning cylinder 7 and the conveyor belt can maintain a suitable friction at all times, effectively avoiding problems caused by excessive or insufficient friction.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coal dust scraping device for a coal unloading machine conveyor belt, comprising a base (1), characterized in that, The base (1) has a sliding groove (2), and a slider (3) is slidably connected in the sliding groove (2). A U-shaped block (4) is fixedly connected to the upper surface of the slider (3), and the U-shaped block (4) is provided with a pressure adjustment mechanism. The pressure regulating mechanism includes a fixed plate a (5) and a fixed plate b (6). The fixed plates a (5) and b (6) are fixedly connected to the two inner sidewalls opposite to the U-shaped block (4). The fixed plates a (5) and b (6) are rotatably connected to a cleaning cylinder (7) via bearings. A gear ring (13) is rotatably connected to the inner sidewall of the cleaning cylinder (7) via bearings. An installation groove (15) is provided on the inner sidewall of the cleaning cylinder (7). A push block (14) is slidably connected in the installation groove (15). A force-sensitive resistor (16) is fixedly connected to the inner end wall of the installation groove (15). The push block (14) is fixedly connected to the gear ring (13). The gear ring (13) is driven by a drive assembly. The U-shaped block (4) has a functional cavity (19) inside. An electromagnet (20) is fixedly connected to the inner wall of the functional cavity (19). The electromagnet (20) is electrically connected to the force-sensitive resistor (16) through a wire. A conductive block (21) is slidably connected inside the functional cavity (19). The conductive block (21) is a hollow structure and a permanent magnet (24) is slidably connected inside. Several second springs (25) are fixedly connected between the permanent magnet (24) and the inner wall of the conductive block (21). Two conductive plates (26) are fixedly embedded in the inner side wall of the functional cavity (19). The conductive plates (26) and the conductive block (21) are connected to an adjustment component.

2. The coal powder scraping device for a coal unloading machine conveyor belt according to claim 1, characterized in that, The adjustment assembly includes an adjustment motor (32), which is fixedly connected to the side wall of the base (1). The conductive sheet (26), the conductive block (21), and the adjustment motor (32) are electrically connected by wires. The base (1) has a liquid chamber (27) that communicates with the sliding groove (2). A pump plate (28) is slidably connected inside the liquid chamber (27). Hydraulic oil (29) is filled between the pump plate (28) and the slider (3). The base (1) is rotatably connected by a screw through a bearing. The threaded cylinder (30) has one end extending into the liquid chamber (27) and the other end extending into the outside of the base (1). The threaded cylinder (30) is threadedly connected to a screw (31). One end of the screw (31) located in the liquid chamber (27) is fixedly connected to the side wall of the pump plate (28). The threaded cylinder (30) is interference-fitted with a driven gear (34). The output shaft of the regulating motor (32) is fixedly connected to a drive gear (33). The drive gear (33) meshes with the driven gear (34).

3. The coal powder scraping device for a coal unloading machine conveyor belt according to claim 1, characterized in that, The drive assembly includes a drive motor (10), which is fixedly connected to the side wall of the U-shaped block (4) via a bracket. The output end of the drive motor (10) is fixedly connected to a main shaft (9). The main shaft (9) is rotatably connected to the U-shaped block (4) and the fixing plate a (5) via bearings and extends into the cleaning cylinder (7). A main gear (11) is interference-fitted to a section of the main shaft (9) inside the cleaning cylinder (7). Multiple auxiliary gears (12) are rotatably connected to the side wall of the fixing plate a (5) inside the cleaning cylinder (7) via bearings. The auxiliary gears (12) mesh with the main gear (11) and the gear ring (13).

4. A coal powder scraping device for a coal unloading machine conveyor belt according to claim 3, characterized in that, A dust collection mechanism is provided at the U-shaped block (4). The dust collection mechanism includes a dust collection box (37) with a U-shaped cross-section and an opening facing one side. The dust collection box (37) is fixedly connected to the upper surface of the base (1). A filter bag (38) is fixedly connected to the inner wall of the dust collection box (37). The U-shaped block (4) and the fixing plate b (6) are connected together by a dust inlet pipe (36). One end of the dust inlet pipe (36) extends through into the cleaning cylinder (7), and the other end is fixedly connected through to the top wall of the dust collection box (37) and extends to engage with it. The main shaft (9) is interference-fitted with a dust suction fan (41). The end of the dust inlet pipe (36) located inside the cleaning cylinder (7) is fixedly connected to a dust collection hood (39). The cleaning cylinder (7) has several dust suction holes (8).

5. A coal powder scraping device for a coal unloading machine conveyor belt according to claim 1, characterized in that, The side wall of the fixed plate a is provided with an annular groove (17), and a connecting block (18) is slidably connected in the annular groove (17). The connecting block (18) is fixedly connected to the side wall of the gear ring (13). The cross-section of the connecting block (18) and the annular groove (17) are both T-shaped.

6. A coal powder scraping device for a coal unloading machine conveyor belt according to claim 4, characterized in that, The dust collection hood (39) is fixedly connected to a support block (40) by a rod. The main shaft (9) is rotatably connected to the side wall of the support block (40) by a bearing. A filter screen (42) is fixedly connected to the inner side wall of the cleaning cylinder (7).

7. A coal powder scraping device for a coal unloading machine conveyor belt according to claim 1, characterized in that, The functional cavity (19) has a limiting groove (22) on its top and bottom walls. The functional cavity (19) is slidably connected to the conductive block (21) through the limiting groove (22). A first spring (23) is fixedly connected between the conductive block (21) and the inner wall of the functional cavity (19).

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