Device for preventing impeller coal feeder of automobile coal unloading ditch from being blocked by coal and preventing belt from being scratched

Abstract

The invention relates to the technical field of thermal power plant coal unloading devices, and discloses a device for preventing an impeller coal feeder of an automobile coal unloading ditch from coal blockage and belt scratching, the device comprises a coal hopper, a coal conveying belt and the impeller coal feeder, an isolation grate is arranged between the coal hopper and the coal conveying belt, and the isolation grate is movably arranged between the coal hopper and the coal conveying belt through an adjusting assembly; the adjusting assembly enables the isolation grate to be obliquely arranged between the coal hopper and the coal conveying belt, the inclination angle a of the isolation grate is adjusted by the adjusting assembly to change within the range of 10-90 degrees, and the isolation grate is further provided with a dredging assembly used for dredging materials on the grate. By arranging the adjusting assembly and the dredging assembly, the isolating grate can be arranged between the coal bucket and the coal conveying belt in an inclined mode through the adjusting assembly, and the arranged dredging assembly can dredge coal blocked on the isolating grate in the modes of vibration, rolling, discharging and the like; the screening device has the advantages that the screening effect is good, the blocking phenomenon is not prone to occurring, and it is guaranteed that the isolation grate cannot be damaged.

Description

Technical Field

[0001] The invention relates to a device for preventing coal blockage and belt scratching of an impeller coal feeder in a coal unloading ditch of a vehicle, and belongs to the technical field of coal unloading devices in thermal power plants. Background Art

[0002] Currently, the transportation and unloading of coal are crucial aspects of the daily operations of thermal power plants, directly impacting their normal power generation and production efficiency. Generally speaking, coal for thermal power plants is transported and unloaded primarily through two methods.

[0003] The first option is to transport the coal by train using a dumper for loading and unloading. The other option is to transport the coal by truck using a truck unloading ditch and an impeller coal feeder. Compared to train transport, the coal transported by truck often comes from small coal mines and is mostly mixed coal. Due to the relatively low management and screening standards during the mining and production processes in small coal mines, this mixed coal is often mixed with impurities such as stones, wood, and iron. The presence of these impurities not only affects the coal's combustion efficiency but also creates many potential problems for subsequent loading and unloading equipment, such as easily causing coal blockage in the impeller coal feeder and scratching the conveyor belt below.

[0004] To this end, the current common approach is to add grates to the top of the coal hopper to control the mixing of such impurities. However, since coal can also get stuck on the grates, the current common method is to use a grab bucket to intentionally collide with the grates to clear the blockage. However, controlling the grab bucket is very challenging for the operator's operational ability. If the operator is not careful in operation, it is very easy to cause the grate to break, thus affecting the effect of screening out impurities. At the same time, most common grates are horizontally installed on the top of the coal hopper. For example, the utility model patent with Chinese patent application number CN200420017246.1 discloses an automatic coal hopper feeder, in which the coal grate is directly installed horizontally on the top of the small coal hopper. The material flow on the horizontally set grate is relatively slow, which will lead to insufficient contact between the material and the grate, which may cause some qualified materials to fail to pass through the grate in time, thereby reducing the screening efficiency. In addition, on the horizontal grate, the material may accumulate on the grate surface due to mutual squeezing, agglomeration, etc., which can easily lead to blockage. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a device for preventing coal blockage and belt scratching of the impeller coal feeder of the automobile coal unloading ditch.

[0006] The technical solutions of the present invention are as follows: A device for preventing coal blockage and belt scratching of an impeller coal feeder in a coal unloading ditch of an automobile, comprising a coal hopper, a coal conveying belt and an impeller coal feeder. An isolation grate is provided between the coal hopper and the coal conveying belt. The isolation grate is movably arranged between the coal hopper and the coal conveying belt by means of an adjustment component. The adjustment component causes the isolation grate to be tilted and arranged between the coal hopper and the coal conveying belt. The inclination angle a of the isolation grate is adjusted by the adjustment component to vary within a range of 10 to 90 degrees. The isolation grate is also provided with a dredging component for dredging material on the grate.

[0007] Furthermore, a storage box is provided at one side end position of the isolation grate, and this side end of the isolation grate is rotatably connected to the top opening position of the storage box by setting a movable shaft. When the adjustment component adjusts the isolation grate, the isolation grate rotates around the center line of the movable shaft. A support frame is provided at the other side end position of the isolation grate, one end of the support frame is connected to the external frame, and the other end is hinged to this side end of the isolation grate.

[0008] Furthermore, the adjustment assembly is arranged at the bottom of the isolation grate away from the storage box. The adjustment assembly includes an oil cylinder, the piston part of the oil cylinder is installed at the bottom of the isolation grate, and the bottom of the oil cylinder is installed on the external frame. The oil cylinder is also connected to the control valve group and the oil pump body in sequence in the direction away from the isolation grate through a high-pressure oil pipe. The oil pump body is also connected to the oil tank and the oil pump motor.

[0009] Furthermore, the dredging component includes a vibration motor, which is installed on the side wall of the isolation grate.

[0010] Furthermore, the device also includes an electrical control system, which is electrically connected to the adjustment component and the dredging component respectively, and is used to control the working states of the adjustment component and the dredging component.

[0011] Furthermore, a material sliding plate is provided on the movable shaft, and the material sliding plate is vertically arranged to the isolation grate. When the isolation grate drives the movable shaft to rotate, the material sliding plate follows the movement and can be rotated into the top opening of the storage box.

[0012] Furthermore, the dredging component includes a first mounting block provided on both side walls of the isolation grate, and the first mounting blocks are symmetrically provided on the side walls of the same side of the isolation grate, a second mounting block is provided above each first mounting block, a hydraulic cylinder is provided on the top of one of the first mounting blocks, the bottom of the hydraulic cylinder is installed on this first mounting block, the piston part of the hydraulic cylinder is installed on the corresponding second mounting block, and a limiting slide is provided on the top of the remaining first mounting blocks, and each limiting slide is movable through the corresponding second mounting block, wherein a sliding rod is provided between the second mounting blocks on both sides of one side, the sliding rod is slidably connected with the first slider, and the second mounting blocks on both sides of the other side are rotatably connected, and a first motor is also provided on one of the second mounting blocks on this side, the electric spindle of the first motor is connected together, and a second slider is also provided on the screw rod, and the second slider is threadedly connected to the screw rod by setting a threaded mounting hole, and a crushing roller is also provided between the first slider and the second slider.

[0013] Furthermore, the crushing roller is rotatably connected between the first slider and the second slider, and a transmission cavity is also opened in the second slider. The corresponding side end of the crushing roller is movably inserted into the transmission cavity, and a first bevel gear is provided on the end of the crushing roller that penetrates into the transmission cavity. A second motor is provided on the top of the second slider, and the electric spindle of the second motor is movably inserted into the transmission cavity. A second bevel gear is provided on the electric spindle of the second motor, and the second bevel gear is meshed and connected with the first bevel gear.

[0014] Furthermore, the isolation grate includes a main body plate, which is provided with a plurality of through slots distributed in a transverse array, and each through slot is provided with a plurality of spacer blocks, which are evenly distributed along the length direction of the through slot to divide the through slot into a plurality of filter grids of the same shape and size.

[0015] Furthermore, the dredging component includes several dredging shafts, and the number and distribution of the spacer blocks in each through slot are adapted so that the spacer blocks at corresponding positions in adjacent through slots are on the same straight line. The dredging shaft is movably arranged to pass through each through slot, and one dredging shaft corresponds to all the spacer blocks on a straight line. All the spacer blocks on the same straight line are fixedly arranged on the top of the corresponding dredging shaft. A dredging plate is provided at the bottom of each dredging shaft. When the dredging shaft rotates, the dredging plate can follow the movement and rotate into the corresponding filter grid. A transmission box is also provided on one side wall of the main plate. The corresponding side end of each dredging shaft is movably inserted into the transmission box. A transmission gear is provided on the end of each dredging shaft that penetrates into the transmission box. All the transmission gears are rotatably connected by setting a transmission chain. A third motor is also provided on the outer wall of the transmission box. The electric spindle of the third motor movably penetrates the transmission box and is connected to one of the dredging shafts.

[0016] The present invention has the following beneficial effects: The present invention is provided with an adjustment component and a dredging component. The adjustment component can make the isolation grate be inclined and set between the coal hopper and the coal conveyor belt. The inclined isolation grate uses gravity to make the coal material falling on the isolation grate slide downward more smoothly under the action of its own gravity along the downward component of the isolation grate surface, so that the coal material is not easy to accumulate on the isolation grate. At the same time, the inclined isolation grate can also increase the contact time and contact area between the coal material and the isolation grate, so that the coal material of qualified particle size can be more fully screened out. The dredging component can dredge the coal material blocked on the isolation grate by vibration, rolling, exclusion and other methods. The dredging effect is good and will not cause damage to the isolation grate. Compared with the existing technology, it has the advantages of good screening effect, not easy to be blocked, and ensuring that the isolation grate will not be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A top view of the first embodiment of the present invention; Figure 2 It is a front view of the first embodiment of the present invention; Figure 3 A top view of the dredging assembly in the second embodiment of the present invention; Figure 4 It is a side view of the dredging assembly in the second embodiment of the present invention; Figure 5 is a cross-sectional view of the second sliding block in the second embodiment of the present invention; Figure 6 A top view of the dredging assembly in Example 3 of the present invention; Figure 7 It is a partial cross-sectional view of the isolation grate in the third embodiment of the present invention.

[0018] The reference numerals in the figures are as follows: 1. Coal hopper; 2. Isolation grate; 3. Storage box; 4. Movable shaft; 5. Support frame; 6. External frame; 7. Oil cylinder; 8. High-pressure oil pipe; 9. Control valve group; 10. Oil pump body; 11. Oil tank; 12. Oil pump motor; 13. Vibration motor; 14. Electrical control system; 15. Slide plate; 16. First mounting block; 17. Second mounting block; 18. Hydraulic cylinder; 19. Limiting slide column; 20. Slide rod; 21. , first slider; 22, screw rod; 23, first motor; 24, second slider; 25, threaded mounting hole; 26, crushing roller; 27, transmission chamber; 28, first bevel gear; 29, second motor; 30, second bevel gear; 31, main plate; 32, through groove; 33, spacer block; 34, filter grid; 35, dredging shaft; 36, dredging plate; 37, transmission box; 38, transmission gear; 39, transmission chain; 40, third motor. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1: Please refer to Figure 1 and Figure 2 The present embodiment provides a device for preventing coal blockage and belt scratching of an impeller coal feeder in a coal unloading ditch of a car, comprising a coal hopper 1, a coal conveying belt and an impeller coal feeder. The coal conveying belt is arranged below the coal hopper 1 and is used to receive and transport the coal falling from the coal hopper 1. The impeller coal feeder can move to the position of the coal hopper 1 during the unloading process to stir up the coal in the coal hopper 1 so that it can be discharged from the coal hopper 1.

[0021] An isolation grate 2 is installed between the coal hopper 1 and the coal conveyor belt. The screening aperture of the adjacent grate can be selected and set according to actual conditions. The isolation grate 2 is movably installed between the coal hopper 1 and the coal conveyor belt by means of an adjustment component. The adjustment component tilts the isolation grate 2 between the coal hopper 1 and the coal conveyor belt. The inclination angle a of the isolation grate 2 is adjusted by the adjustment component within a range of 10 to 90 degrees to accommodate the required screening work and the subsequent discharge of the material screened from the isolation grate 2. The isolation grate 2 is also equipped with a dredging component for clearing the material on the grate to prevent material clogging on the isolation grate 2.

[0022] In this embodiment, a storage box 3 is provided at the right end of the isolation grate 2. This end of the isolation grate 2 is rotatably connected to the top opening of the storage box 3 by providing a movable shaft 4, so that when the adjustment component adjusts the isolation grate 2, the isolation grate 2 can rotate around the center line of the movable shaft 4 to perform the required swinging, thereby achieving precise adjustment of the tilt angle a. A support frame 5 is provided at the left end of the isolation grate 2. The bottom end of the support frame 5 is hinged to the external frame 6, and the top end of the support frame 5 is hinged to this end of the isolation grate 2 to support the isolation grate 2, so that it can be more firmly positioned between the coal hopper 1 and the coal conveyor belt.

[0023] In this embodiment, the adjustment assembly is arranged at the bottom of the left end of the isolation grate 2. The adjustment assembly includes an oil cylinder 7. The piston portion of the oil cylinder 7 is hinged to the bottom of the isolation grate 2. The bottom of the oil cylinder 7 is fixedly mounted on the external frame 6. The external frame 6 is arranged below the isolation grate 2. The oil cylinder 7 is also connected to a control valve group 9 and an oil pump body 10 in sequence in the direction away from the isolation grate 2 through a high-pressure oil pipe 8. The oil pump body 10 is also connected to an oil tank 11 and an oil pump motor 12. The oil pump motor 12 and the oil tank 11 provide support for the operation of the oil pump body 10. The control valve group 9 is used to control the oil flow input by the oil pump body 10. The oil pump body 10 provides support for the operation of the oil cylinder 7.

[0024] In this embodiment, the dredging component includes two vibration motors 13, and the two vibration motors 13 are respectively fixedly mounted on the side walls of the isolation grate 2. When the vibration motor 13 starts working, the vibration of the vibration part can make the isolation grate 2 vibrate, so as to shake out the material blocking the isolation grate 2, thereby achieving the dredging of the isolation grate 2.

[0025] In this embodiment, for ease of use, the device also includes an electrical control system 14, which is electrically connected to the adjustment component and the dredging component respectively. The electrical control system 14 is used to control the working status of the adjustment component and the dredging component to achieve intelligent control, thereby facilitating use by operators.

[0026] In this embodiment, in order to facilitate the unloading work, a material sliding plate 15 is fixedly provided on the movable shaft 4. The material sliding plate 15 is arranged perpendicular to the isolation grate 2. When the isolation grate 2 drives the movable shaft 4 to rotate, the material sliding plate 15 follows the movement and can be rotated into the top opening of the storage box 3, so as to assist the material on the isolation grate 2 to be discharged into the storage box 3.

[0027] The working principle of this embodiment is that before the truck unloading ditch is unloaded, the coal conveyor belt and impeller coal feeder are activated. The impeller coal feeder is moved to the material collection point and the impeller is rotated to stir the coal from the truck into the coal hopper 1. During the process of falling, the coal falls onto the isolation grate 2. The inclination angle a of the isolation grate 2 is adjusted to 10-20 degrees by the adjustment assembly. The specific adjustment method is to start the operation of the oil pump body 10, the oil pump motor 12, and the control valve group 9. The required oil is injected into the oil cylinder 7 through the high-pressure oil pipe 8 to make it expand and contract accordingly, thereby adjusting the posture of the isolation grate 2. The isolation grate 2 with an inclination angle a of 10-20 degrees can effectively screen out impurities in the coal. After being screened by the isolation grate 2, the coal finally falls onto the coal conveyor belt and is transported to the desired location by the coal conveyor belt. When there are too many impurities on the isolation grate 2 and the coal on the isolation grate 2 cannot flow down by itself, the operator can start the vibration motor 13 to start working. The vibration motor 13 makes the isolation grate 2 vibrate to shake out the material blocking the isolation grate 2, thereby clearing the isolation grate 2 and allowing the coal on the isolation grate 2 to continue to flow down smoothly. When there are too many debris on the isolation grate 2, which affects the falling amount of coal or causes coal blockage, the staff controls the adjustment component to start working, so that it adjusts the inclination angle a of the isolation grate 2 to 80-90°, so that the debris on the isolation grate 2 can be dumped into the debris storage box 3, and the isolation grate 2 is cleaned. During this process, the chute plate 15 can be rotated into the top opening of the debris storage box 3 to play an auxiliary transportation role. After the debris on the isolation grate 2 is dumped, the staff controls the adjustment component to start working, reset the isolation grate 2, and then the required coal unloading work can continue.

[0028] Example 2: Please refer to Figures 3-5This embodiment provides a device for preventing coal blockage and belt scratching of the impeller coal feeder of the coal unloading ditch of the automobile. The difference between this device and the first embodiment lies in the difference in the structure of the dredging component. In this embodiment, the dredging component includes a first mounting block 16 provided on both side walls of the isolation grate 2, and the first mounting blocks 16 are symmetrically provided on the same side wall of the isolation grate 2. That is, the number of the first mounting blocks 16 is four, and the first mounting blocks 16 are distributed on the isolation grate 2 in a rectangular shape. A second mounting block 17 is provided above each first mounting block 16, and a hydraulic cylinder 18 is provided on the top of one of the first mounting blocks 16. The bottom of the hydraulic cylinder 18 is fixedly mounted on this first mounting block 16, and the piston part of the hydraulic cylinder 18 is fixedly mounted on the corresponding second mounting block 17. The tops of the remaining first mounting blocks 16 are all provided with a limiting slide 19, and each limiting slide 19 is movable through the corresponding second mounting block 17. Through the above-mentioned setting, when the hydraulic cylinder 18 starts to work, it can drive the corresponding second mounting block 17 to perform corresponding up and down movements, so that the remaining second mounting blocks 17 can follow the movement along the corresponding limiting slide column 19, thereby realizing the control of the horizontal height of all second mounting blocks 17.

[0029] A slide bar 20 is disposed between the two second mounting blocks 17 on the left side of the isolation grate 2, parallel to the isolation grate 2. A first slider 21 is slidably connected to the slide bar 20. A screw rod 22 is disposed between the two second mounting blocks 17 on the right side of the isolation grate 2, parallel to the isolation grate 2. The two ends of the screw rod 22 are rotatably connected to the corresponding second mounting block 17. A first motor 23 is also fixedly mounted on one of the second mounting blocks 17 on the right side of the isolation grate 2. The electric spindle of the first motor 23 is movable through the second mounting block 17 and is fixedly connected to the corresponding side end of the screw rod 22, so as to drive the screw rod 22 to rotate during operation. A second slider 24 is also disposed on the screw rod 22. The second slider 24 is threadedly connected to the screw rod 22 through a threaded mounting hole 25, so as to move along the screw rod 22 when the screw rod 22 rotates. The principle of this is the same as that of a conventional screw nut, and will not be described in detail here. A crushing roller 26 is also provided between the first slider 21 and the second slider 24. Through the above arrangement, when coal is blocked on the isolation grate 2, the hydraulic cylinder 18 is controlled to start working to control the horizontal height of the second mounting block 17, so as to adjust the horizontal height of the slide bar 20 and the screw rod 22, thereby adjusting the height of the crushing roller 26 to be able to contact the isolation grate 2, so as to crush the material blocked on the isolation grate 2. At the same time, the second motor 29 is controlled to start working, and by driving the screw rod 22 to rotate, the second slider 24 is able to rotate along the screw rod 22, thereby driving the crushing roller 26 and the first slider 21 to move in accordance with the movement, so as to completely cover the material blocked on the isolation grate 2, thereby clearing the isolation grate 2.

[0030] To further improve the dredging capacity of the dredging assembly, in this embodiment, the crushing roller 26 is also rotatably connected between the first slider 21 and the second slider 24. A transmission chamber 27 is also provided in the second slider 24. The corresponding side ends of the crushing roller 26 are movably inserted into the transmission chamber 27. A first bevel gear 28 is fixedly provided on the end of the crushing roller 26 that penetrates the transmission chamber 27. A second motor 29 is fixedly provided on the top of the second slider 24. The electric spindle of the second motor 29 is movably inserted into the transmission chamber 27. A second bevel gear 30 is fixedly provided on the electric spindle of the second motor 29. The second bevel gear 30 is meshed and connected with the first bevel gear 28. Through the above arrangement, when the second motor 29 starts working, it can drive the second bevel gear 30 to rotate, thereby driving the first bevel gear 28 to rotate under the action of the meshing connection, and then driving the crushing roller 26 to rotate. The rotation of the crushing roller 26 can better crush the materials it contacts, thereby improving the dredging capacity.

[0031] Example 3: Please refer to Figure 6 and Figure 7 This embodiment provides a device for preventing coal blockage and belt scratches in the impeller coal feeder of a coal unloading ditch of a car. The difference between this device and the first embodiment lies in the difference in the structure of the isolation grate 2 and the structure of the dredging component. In this embodiment, the isolation grate 2 is selected as a grate with an unconventional structure. The isolation grate 2 includes a main body plate 31, which is provided with a plurality of through slots 32 distributed in a transverse array. Each through slot 32 is provided with a plurality of spacer blocks 33. The spacer blocks 33 are evenly distributed along the length of the through slot 32 in the through slot 32, thereby dividing the through slot 32 into a plurality of filter grids 34 of the same shape and size. The specific number of through slots 32 and spacer blocks 33 can be selected and set according to actual conditions and is not limited here.

[0032] In this embodiment, the dredging component includes several dredging shafts 35. The number and distribution of the spacer blocks 33 in each through groove 32 are adapted so that the spacer blocks 33 at corresponding positions in adjacent through grooves 32 are on the same straight line. The dredging shaft 35 is movably arranged to pass through each through groove 32, and one dredging shaft 35 corresponds to all the spacer blocks 33 on a straight line. All the spacer blocks 33 on the same straight line are fixedly set on the top of the corresponding dredging shaft 35, and in order to ensure that the subsequent dredging shaft 35 can rotate normally, each spacer block 33 is movably set in the corresponding through groove 32. A dredging plate 36 is fixedly provided at the bottom of each dredging shaft 35. When the dredging shaft 35 rotates, the dredging plate 36 can follow the movement and rotate into the corresponding filter grid 34. A transmission box 37 is also fixedly provided on the right side wall of the main plate 31. The corresponding side end of each dredging shaft 35 is movably inserted into the transmission box 37. A transmission gear 38 is fixedly provided on the end of each dredging shaft 35 that penetrates into the transmission box 37. All transmission gears 38 are rotatably connected by a transmission chain 39. A third motor 40 is also provided on the outer wall of the transmission box 37. The electric spindle of the third motor 40 is movably inserted into the transmission box 37 and is fixedly connected to one of the dredging shafts 35.

[0033] With the aforementioned arrangement, when coal becomes stuck on the isolation grate 2, the third motor 40 is activated, driving the corresponding dredging shaft 35 to rotate. This, in turn, causes all dredging shafts 35 to rotate under the action of the transmission gear 38 and the transmission chain 39. After all dredging shafts 35 rotate, their dredging plates 36 follow suit and rotate into the corresponding filter cells 34, clearing coal or impurities stuck in the filter cells 34 and pushing them out of the isolation grate 2. The inclination angle a of the isolation grate 2 can then be adjusted to 80-90° using the adjustment assembly, allowing the coal or impurities on the isolation grate 2 to be discharged into the debris storage box 3 for collection, thus providing excellent dredging capabilities. When screening is required, the dredging shafts 35 are rotated by controlling the third motor 40, causing the dredging plates 36 to be perpendicular to the main plate 31. At this point, the filter cells 34 can perform an effective screening operation.

[0034] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for preventing coal blockage and belt scratching of an impeller coal feeder in a coal unloading ditch of a car, comprising a coal hopper (1), a coal conveying belt and an impeller coal feeder, characterized in that: An isolation grate (2) is provided between the coal hopper (1) and the coal conveyor belt. The isolation grate (2) is movably provided between the coal hopper (1) and the coal conveyor belt by providing an adjustment component. The adjustment component causes the isolation grate (2) to be tilted and provided between the coal hopper (1) and the coal conveyor belt. The tilt angle a of the isolation grate (2) is adjusted by the adjustment component and changes within the range of 10 to 90 degrees. The isolation grate (2) is also provided with a dredging component for dredging materials on the grate.

2. The device for preventing coal blockage and belt scratching of the impeller coal feeder of a truck coal unloading ditch according to claim 1, characterized in that: A storage box (3) is provided at one end portion of the isolation grate (2). The end portion of the isolation grate (2) is rotatably connected to the top opening of the storage box (3) by providing a movable shaft (4). When the adjustment component adjusts the isolation grate (2), the isolation grate (2) rotates around the center line of the movable shaft (4). A support frame (5) is provided at the other end portion of the isolation grate (2). One end of the support frame (5) is connected to the external frame (6), and the other end is hinged to the end portion of the isolation grate (2).

3. The device for preventing coal blockage and belt scratching of the impeller coal feeder of a truck coal unloading ditch according to claim 2, characterized in that: The adjustment assembly is arranged at the bottom of the isolation grate (2) away from the storage box (3), and the adjustment assembly includes an oil cylinder (7). The piston portion of the oil cylinder (7) is mounted on the bottom of the isolation grate (2), and the bottom of the oil cylinder (7) is mounted on the external frame (6). The oil cylinder (7) is also connected to a control valve group (9) and an oil pump body (10) in sequence in a direction away from the isolation grate (2) through a high-pressure oil pipe (8). The oil pump body (10) is also connected to an oil tank (11) and an oil pump motor (12).

4. The device for preventing coal blockage and belt scratching of the impeller coal feeder of a truck coal unloading ditch according to claim 1, characterized in that: The dredging assembly comprises a vibration motor (13), which is mounted on the side wall of the isolation grate (2).

5. The device for preventing coal blockage and belt scratching of the impeller coal feeder of a truck coal unloading ditch according to claim 1, characterized in that: The device further comprises an electrical control system (14), which is electrically connected to the adjustment component and the dredging component respectively and is used to control the working states of the adjustment component and the dredging component.

6. The device for preventing coal blockage and belt scratching of the impeller coal feeder of a truck coal unloading ditch according to claim 2, characterized in that: The movable shaft (4) is also provided with a material sliding plate (15), which is arranged perpendicularly to the isolation grate (2). When the isolation grate (2) drives the movable shaft (4) to rotate, the material sliding plate (15) follows the rotation and can be rotated into the top opening of the storage box (3).

7. The device for preventing coal blockage and belt scratching of the impeller coal feeder of a truck coal unloading ditch according to claim 1, characterized in that: The dredging assembly includes first mounting blocks (16) provided on both side walls of the isolation grate (2), and the first mounting blocks (16) are symmetrically provided on the same side wall of the isolation grate (2), and a second mounting block (17) is provided above each first mounting block (16), a hydraulic cylinder (18) is provided on the top of one of the first mounting blocks (16), the bottom of the hydraulic cylinder (18) is installed on the first mounting block (16), and the piston of the hydraulic cylinder (18) is installed on the corresponding second mounting block (17), and the tops of the remaining first mounting blocks (16) are provided with limiting slides (19), and each limiting slide (19) is movable through the corresponding second mounting block ( 17), a slide bar (20) is provided between the second mounting blocks (17) on both sides of one side, a first slide bar (21) is slidably connected to the slide bar (20), a screw rod (22) is rotatably connected between the second mounting blocks (17) on both sides of the other side, a first motor (23) is also provided on one of the second mounting blocks (17) on this side, the electric spindle of the first motor (23) is connected to the screw rod (22), a second slide bar (24) is also provided on the screw rod (22), the second slide bar (24) is threadedly connected to the screw rod (22) by providing a threaded mounting hole (25), and a crushing roller (26) is also provided between the first slide bar (21) and the second slide bar (24).

8. The device for preventing coal blockage and belt scratching of the impeller coal feeder of a truck coal unloading ditch according to claim 7, characterized in that: The crushing roller (26) is rotatably connected between the first slider (21) and the second slider (24). A transmission cavity (27) is further provided in the second slider (24). The corresponding side end of the crushing roller (26) is movably inserted into the transmission cavity (27). A first bevel gear (28) is provided on the end of the crushing roller (26) that penetrates into the transmission cavity (27). A second motor (29) is provided on the top of the second slider (24). The electric main shaft of the second motor (29) is movably inserted into the transmission cavity (27). A second bevel gear (30) is provided on the electric main shaft of the second motor (29). The second bevel gear (30) is meshed and connected with the first bevel gear (28).

9. The device for preventing coal blockage and belt scratching of the impeller coal feeder of a truck coal unloading ditch according to claim 1, characterized in that: The isolation grate (2) comprises a main body plate (31), the main body plate (31) being provided with a plurality of through slots (32) distributed in a transverse array, each through slot (32) being provided with a plurality of spacer blocks (33), the spacer blocks (33) being evenly distributed in the through slot (32) along the length direction of the through slot (32), thereby dividing the through slot (32) into a plurality of filter grids (34) of the same shape and size.

10. The device for preventing coal blockage and belt scratching of the impeller coal feeder of a truck coal unloading ditch according to claim 9, characterized in that: The dredging assembly includes a plurality of dredging shafts (35), the number and distribution of the spacer blocks (33) in each through groove (32) are adapted so that the spacer blocks (33) at corresponding positions in adjacent through grooves (32) are on the same straight line, the dredging shaft (35) is movably arranged to pass through each through groove (32), and one dredging shaft (35) corresponds to all the spacer blocks (33) on a straight line, and all the spacer blocks (33) on the same straight line are fixedly arranged on the top of the corresponding dredging shaft (35), and a dredging plate (36) is arranged at the bottom of each dredging shaft (35), and the dredging plate (36) is arranged when the dredging shaft (35) rotates. It can follow the movement and rotate to enter the corresponding filter grid (34). A transmission box (37) is also provided on one side wall of the main body plate (31). The corresponding side end of each dredging shaft (35) is movably inserted into the transmission box (37). A transmission gear (38) is provided on the end of each dredging shaft (35) inserted into the transmission box (37). All the transmission gears (38) are rotatably connected by setting a transmission chain (39). A third motor (40) is also provided on the outer wall of the transmission box (37). The electric spindle of the third motor (40) is movably inserted into the transmission box (37) and is connected to one of the dredging shafts (35).

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