Automatic coal dust cleaning device for bucket wheel machine coal falling barrel

Abstract

The utility model discloses an automatic coal dust cleaning device for a bucket wheel machine coal falling barrel, and relates to the technical field of coal dust cleaning equipment. The coal shaking device comprises a cantilever connected to a coal falling barrel, a push rod motor is fixedly arranged on the cantilever, a scraper structure is hinged to the end of a push rod on the push rod motor, linear guide rails are arranged on the two sides of the push rod motor respectively, connecting rods are arranged on the linear guide rails in a sliding mode, and the end, close to one side of a coal shaking barrel, of each connecting rod is fixedly connected with the scraper structure. According to the utility model, the electric mechanism is designed, remote control is realized, and coal dust near the coal falling barrel below the cantilever belt is automatically cleaned; daily maintenance work is simple, and easy-to-wear products are convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of coal dust cleaning equipment, and more specifically, to an automatic coal dust cleaning device for the coal dropping barrel of a bucket wheel stacker-reclaimer. Background Art

[0002] The bucket wheel stacker-reclaimer is a key equipment in the yards of thermal power plants, coal mines, and bulk cargo terminals, mainly used for the stacking and reclaiming operations of bulk materials such as coal in the yard. When the bucket wheel stacker-reclaimer reclaims materials, the bucket wheel at the head of the boom extends into the material pile to reclaim materials. The bucket wheel rotates and discharges through the chute, pours onto the boom belt, the boom belt then pours onto the boom coal dropping barrel, and then to the tail car belt conveyor of the bucket wheel stacker-reclaimer, and enters the ground belt conveyor system for transportation. During the coal reclaiming operation of the bucket wheel stacker-reclaimer, when the coal dropping barrel falls, a large amount of coal dust is generated, and a relatively thick layer of coal dust is generated around the coal dropping barrel. Therefore, after each shift of operation, the operating personnel use a water gun to wash the boom belt, the slewing platform of the trolley, etc. of the bucket wheel stacker-reclaimer to wash away the coal dust. The coal dust generated under the boom belt near the coal dropping barrel is thicker than that in other places. However, due to the presence of the motor of the belt conveyor and the support frame of the idler roller at this place, it is difficult to wash the coal dust under the belt, resulting in long-term coal accumulation. The long-term coal accumulation is prone to oxidation and spontaneous combustion in the air, affecting production safety. At present, the method of manual cleaning is adopted to regularly remove the coal accumulation under the boom belt near the coal dropping barrel. However, manual cleaning is very difficult, it is difficult to clean thoroughly, and the labor intensity of the personnel is relatively large. Content of the Utility Model

[0003] In order to overcome the above technical deficiencies, the utility model provides an automatic coal dust cleaning device for the coal dropping barrel of a bucket wheel stacker-reclaimer, which can automatically clean the coal dust near the coal dropping barrel under the boom belt.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: an automatic coal dust cleaning device for the coal dropping barrel of a bucket wheel stacker-reclaimer, including a boom connected to the coal dropping barrel, a push rod motor is fixedly arranged on the boom, the end of the push rod on the push rod motor is hinged with a scraper structure, and a linear guide rail is arranged on each side of the push rod motor. A connecting rod is slidably arranged on the linear guide rail, and the end of the connecting rod close to the coal dropping barrel is fixedly connected with the scraper structure.

[0005] The working principle of the utility model is as follows: when automatic cleaning work is to be carried out, the upper computer issues an instruction to the PLC of the full-automatic control system of the bucket wheel stacker-reclaimer, and the PLC then drives the push rod motor (drives as soon as it is powered on). The push rod of the push rod motor advances, driving the scraper structure to advance. The connecting rod advances synchronously along the linear guide rail (the scraper structure is fixed to the connecting rod, and the connecting rod is arranged on the linear guide rail. The beneficial point is that the scraper structure is in balanced force and walks in a straight line during the cleaning process), assisting the scraper structure to automatically clean the coal dust on the lower side of the boom belt and near the edge of the coal dropping barrel.

[0006] Preferably, the scraper structure includes an arc-shaped scraper and a connecting bracket disposed on the arc-shaped scraper. The connecting bracket is connected to the connecting rod and the push rod on the push rod motor, and is used for connecting and supporting the arc-shaped scraper. The arc-shaped scraper is used for effectively cleaning the coal dust near the coal dropping cylinder.

[0007] Preferably, a rubber scraper head is provided on the arc-shaped scraper, and the rubber scraper head fits the upper surface of the cantilever. The rubber scraper head can reduce the gap between the scraper and the cantilever and make the cleaning more effective.

[0008] Preferably, an arc-shaped groove is provided on the arc-shaped scraper, and the arc-shaped groove is disposed toward the side of the coal dropping cylinder. The scraper is designed to be arc-shaped and matches the round shape of the coal dropping cylinder, reducing the push rod stroke during cleaning.

[0009] Preferably, the connecting bracket includes two sets of connecting short rods and one set of connecting long rods. The ends of the two sets of connecting short rods are fixedly connected to the arc-shaped scraper on the side away from the arc-shaped groove, and both ends of the connecting long rod are fixedly connected to the side wall near the other end of the connecting short rod.

[0010] Preferably, a slider is provided between the connecting rod and the linear guide rail. The slider is fixedly disposed at the end of the connecting rod, and a limit switch I is provided on the linear guide rail, and a limit switch II is provided inside the push rod motor. The limit switch I is used to detect the situation where the slider on the linear guide rail moves to the limit position, and is used to trigger the polarity reversal of the electrodes of the push rod motor, so that the push rod on the push rod motor advances instead of retreats. After the limit switch II is triggered, the push rod retreats and changes to advance. The limit switch I can be arranged at any position on the linear guide rail according to the on-site installation conditions and requirements, and the position can be flexibly adjusted.

[0011] Preferably, a rear fixing bracket for the push rod motor and a front fixing bracket for the push rod motor are provided on the cantilever, and the push rod motor is fixed by the rear fixing bracket for the push rod motor and the front fixing bracket for the push rod motor. The rear fixing bracket for the push rod motor is used to fix the motor part at the tail end of the push rod motor, and the front fixing bracket for the push rod motor is used to define the linear direction when the push rod advances or retreats, so that it will not deviate due to other forces.

[0012] Preferably, two sets of connecting sections arranged up and down are provided on the scraper between the two sets of connecting short rods, a connecting shaft is provided between the two sets of connecting sections, and the connecting shaft is rotatably connected to the end of the push rod of the push rod motor. It is convenient to realize the disassembly and connection between the push rod motor and the scraper.

[0013] Compared with the prior art, the beneficial effects of the present utility model are: (1) An electric mechanism is designed to remotely control and automatically clean the coal dust near the coal dropping cylinder under the cantilever belt; (2) The daily maintenance work of the present utility model is simple, and the replacement of easily worn parts is convenient. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of an automatic coal dust cleaning device for a coal dropping cylinder of a bucket wheel machine of the present utility model.

[0015] Figure 2 It is a partial structural schematic diagram of an automatic coal dust cleaning device for the coal dropping chute of a bucket wheel machine of the present utility model.

[0016] Figure 3 It is a partial structural schematic diagram of the guide rail cleaning mechanism of the present utility model.

[0017] In the figure: coal dropping chute 100; boom 101; boom belt 102; push rod motor 200; push rod 201; rear fixed bracket 202 of the push rod motor; front fixed bracket 203 of the push rod motor; linear guide rail 300; connecting rod 301; slider 302; limit switch 1 303; scraper structure 400; arc-shaped scraper 401; rubber scraping head 402; connecting bracket 403; arc-shaped groove 404; connecting short rod 405; connecting long rod 406; connecting section 407; connecting shaft 408; mounting bracket 500; servo motor 501; fan 502. Specific embodiments

[0018] The technical solution of the utility model will be further specifically described below through specific embodiments in conjunction with the drawings: Embodiment 1: Refer to the appendix Figure 1 , appendix Figure 2 , an automatic coal dust cleaning device for the coal dropping chute of a bucket wheel machine, including a boom 101 connected to the coal dropping chute 100, a boom belt 102 connected through a mounting bracket is provided on the upper side of the boom 101, a push rod motor 200 is fixedly provided between the boom 101 and the boom belt 102, a scraper structure 400 is hinged to the end of the push rod 201 on the push rod motor 200, a linear guide rail 300 is provided on each side of the push rod motor 200, the two groups of linear guide rails 300 are arranged parallel to the push rod 201, a connecting rod 301 is slidably provided on the linear guide rail 300, and the end of the connecting rod 301 close to the coal dropping chute 100 is fixedly connected to the scraper structure 400.

[0019] The scraper structure 400 includes an arc-shaped scraper 401 and a rubber scraping head 402 provided on the arc-shaped scraper 401. The arc-shaped scraper 401 adopts an arc design for effective cleaning of coal dust near the coal dropping chute. The rubber scraping head 402 is made of rubber material and is arranged along the lower arc edge of the arc-shaped scraper 401. The rubber scraping head 402 is in contact with the upper surface of the boom 101. The rubber scraping head 402 can reduce the gap between the arc-shaped scraper 401 and the boom 101, making the cleaning more effective.

[0020] A slider 302 is provided between the connecting rod 301 and the linear guide 300. The slider 302 is fixedly arranged at the end of the connecting rod 301. A limit switch 303 is provided on the linear guide 300, and a limit switch 2 is provided inside the push rod motor 200. The limit switch 303 is used to detect the situation where the slider 302 on the linear guide 300 moves to the limit position. The limit switch 303 is used to trigger the polarity reversal of the electrodes of the push rod motor 200, so that the push rod on the push rod motor 200 advances instead of retreats, and the push rod retreats and changes to advance after the limit switch 2 is triggered. The limit switch 303 can be arranged at any position on the linear guide 300 according to the on-site installation conditions and requirements, and the position can be flexibly adjusted.

[0021] A rear fixed bracket 202 for the push rod motor and a front fixed bracket 203 for the push rod motor are provided on the cantilever 101. The push rod motor 200 is fixed by the rear fixed bracket 202 for the push rod motor and the front fixed bracket 203 for the push rod motor. The rear fixed bracket 202 for the push rod motor is used to fix the motor part at the tail end of the push rod motor 200, and the front fixed bracket 203 for the push rod motor is used to define the linear direction when the push rod advances or retreats, so that it will not deviate due to other forces.

[0022] The working principle of the push rod motor 200 is as follows: After the motor is decelerated by gears, it drives a pair of lead screw nuts. The rotational motion of the motor is changed into a linear motion, and the push rod action is completed by using the forward and reverse rotation of the motor. Complex actions such as rotation and rocking can be completed through various mechanisms such as levers, rockers or connecting rods. By changing the length of the lever arm, the stroke can be increased or enlarged.

[0023] The working principle of the present utility model is as follows: When automatic cleaning work is to be performed, the upper computer issues an instruction to the PLC of the full-automatic control system of the turbine. The PLC then drives the push rod motor 200 (driving when powered on). The push rod 201 on the push rod motor 200 advances, driving the arc-shaped scraper 401 to advance. The connecting rod 301 advances synchronously along the linear guide 300 (the scraper assembly 400 is fixed to the end of the connecting rod 301, and the connecting rod 301 is arranged on the linear guide 300. The beneficial point is that the arc-shaped scraper 401 is in balanced force and walks in a straight line during the cleaning process), driving the slider 302 to advance. When the slider 302 reaches the limit switch 303, the signal of the limit switch 303 is triggered, and the signal is sent to the PLC. The PLC stops supplying power to the push rod motor 200.

[0024] Beneficial effects: (1) An electric mechanism is designed to remotely control and automatically clean the coal dust near the coal chute under the cantilever belt; (2) The daily maintenance work of the present utility model is simple, and the replacement of easily worn parts is convenient; (3) The design of the arc-shaped scraper and the rubber scraper head can effectively clean the coal dust near the coal chute.

[0025] Embodiment 2: Refer to the appendix Figure 1 , the appendix Figure 2 , in this embodiment, the scraper structure is further defined. An automatic coal dust cleaning device for the coal dropping pipe of a bucket wheel machine includes a coal dropping pipe 100 and a boom 101. The coal dropping pipe 100 is connected to the boom 101. A boom belt 102 is provided on the upper side of the boom 101. A push rod motor 200 is fixedly provided between the boom 101 and the boom belt 102. The end of the push rod 201 on the push rod motor 200 is hinged to a scraper structure 400. One linear guide 300 is provided on each side of the push rod motor 200. The two groups of linear guides 300 are arranged parallel to the push rod 201. A connecting rod 301 is slidably provided on the linear guide 300. The end of the connecting rod 301 on the side close to the coal dropping pipe 100 is fixedly connected to the scraper structure 400.

[0026] The scraper structure 400 includes an arc-shaped scraper 401 and a connecting bracket 403 provided on the arc-shaped scraper 401. The connecting bracket 403 is connected to the connecting rod 301 and the push rod 201 on the push rod motor 200 for connecting and supporting the arc-shaped scraper 401. The arc-shaped scraper 400 is used for effectively cleaning the coal dust near the coal dropping pipe 100.

[0027] A rubber scraping head 402 is provided on the arc-shaped scraper 401. The rubber scraping head 402 is attached to the upper surface of the boom 101. The rubber scraping head 402 can reduce the gap between the arc-shaped scraper 401 and the boom 101, making the cleaning more effective.

[0028] An arc-shaped groove 404 is provided on the arc-shaped scraper 401. The arc-shaped groove 404 is arranged on the side facing the coal dropping pipe 100. The arc-shaped scraper is designed to be arc-shaped and matches the round shape of the coal dropping pipe 100, reducing the push rod stroke during cleaning.

[0029] The rubber scraping head 402 is made of rubber material and is arranged along the lower arc edge of the arc-shaped scraper 401. The rubber scraping head 402 is attached to the upper surface of the boom 101. The rubber scraping head 402 can reduce the gap between the arc-shaped scraper 401 and the boom 101, making the cleaning more effective.

[0030] The connecting bracket 403 includes two groups of connecting short rods 405 and one group of connecting long rods 406. The ends of the two groups of connecting short rods 405 are fixedly connected to the arc-shaped scraper 401 on the side away from the arc-shaped groove 404. The two ends of the connecting long rod 406 are fixedly connected to the side walls close to the other ends of the connecting short rods 405.

[0031] A slider 302 is provided between the connecting rod 301 and the linear guide 300. The slider 302 is fixedly arranged at the end of the connecting rod 301. A limit switch 303 is provided on the linear guide 300, and a limit switch 2 is provided inside the push rod motor 200. The limit switch 303 is used to detect the situation where the slider 302 on the linear guide 300 moves to the limit position. The limit switch 303 is used to trigger the polarity reversal of the electrodes of the push rod motor 200, so that the push rod on the push rod motor 200 advances instead of retreats. After the limit switch 2 is triggered, the push rod retreats and changes to advance. The limit switch 303 can be arranged at any position on the linear guide 300 according to the on-site installation conditions and requirements, and the position can be flexibly adjusted.

[0032] A rear fixed bracket 202 for the push rod motor and a front fixed bracket 203 for the push rod motor are provided on the cantilever 101. The push rod motor 100 is fixed by the rear fixed bracket 202 for the push rod motor and the front fixed bracket 203 for the push rod motor. The rear fixed bracket 202 for the push rod motor is used to fix the motor part at the tail end of the push rod motor 200, and the front fixed bracket 203 for the push rod motor is used to define the linear direction when the push rod advances or retreats, so that it will not deviate due to other forces.

[0033] Two connecting sections 407 arranged vertically are provided on the arc-shaped scraper 401 between the two connecting short rods 405. A connecting shaft 408 is provided between the two connecting sections 407. The connecting shaft 408 is rotatably connected to the end of the push rod 201 on the push rod motor 200. It is convenient to realize the disassembly and connection between the push rod motor 200 and the arc-shaped scraper 401.

[0034] The working principle of the push rod motor 200 is as follows: After the motor is decelerated by gears, it drives a pair of lead screw nuts. The rotational motion of the motor is changed into a linear motion, and the push rod action is completed by the forward and reverse rotation of the motor. Complex actions such as rotation and rocking can be completed through various mechanisms such as levers, rockers or connecting rods. By changing the length of the lever arm, the stroke can be increased or enlarged.

[0035] The working principle of the present utility model is as follows: When automatic cleaning work is to be performed, the host computer issues an instruction to the PLC of the fully automatic control system of the turbine. The PLC then drives the push rod motor 200 (driving it as soon as it is powered on). The push rod 201 on the push rod motor 200 advances, driving the arc-shaped scraper 401 to advance. The connecting rod 301 advances synchronously along the linear guide 300 (the scraper structure 400 is fixed to the end of the connecting rod 301, and the connecting rod 301 is arranged on the linear guide 300. The beneficial point is that during the cleaning process, the arc-shaped scraper 401 is in balanced force and moves in a straight line), driving the slider 302 to advance. When the slider 302 reaches the limit switch 1 303, the signal of the limit switch 1 303 is triggered, and the signal is sent to the PLC. The PLC stops supplying power to the push rod motor 200.

[0036] Beneficial effects: (1) An electric mechanism is designed to remotely control and automatically clean the coal dust near the coal dropping cylinder under the cantilever belt; (2) The daily maintenance work of this utility model is simple, and the replacement of easily worn parts is convenient; (3) The design of the arc-shaped scraper and the rubber scraping head can effectively clean the coal dust near the coal dropping cylinder; (4) The connecting bracket, in a U-shaped structure, is convenient for realizing the stable connection of the connecting rod, the push rod motor and the arc-shaped scraper.

[0037] Embodiment 3:

[0038] See the appendix Figure 1 The appendix Figure 2 In this embodiment, a guide rail cleaning mechanism is added. An automatic coal dust cleaning device for the coal dropping cylinder of a bucket wheel machine includes a coal dropping cylinder 100 and a cantilever 101. The coal dropping cylinder 100 is connected to the cantilever 101. There is a cantilever belt 102 on the upper side of the cantilever 101. A push rod motor 200 is fixedly arranged between the cantilever 101 and the cantilever belt 102. The end of the push rod 201 on the push rod motor 200 is hinged to a scraper structure 400. A linear guide 300 is provided on each side of the push rod motor 200. The two groups of linear guides 300 are arranged parallel to the push rod 201. A connecting rod 301 is slidably arranged on the linear guide 300. The end of the connecting rod 301 close to the coal dropping cylinder 100 is fixedly connected to the scraper structure 400.

[0039] The scraper structure 400 includes an arc-shaped scraper 401 and a connecting bracket 403 arranged on the arc-shaped scraper 401. The connecting bracket 403 is connected to the connecting rod 301 and the push rod 201 on the push rod motor 200 for connecting and supporting the arc-shaped scraper 401. The arc-shaped scraper 400 is used for effectively cleaning the coal dust near the coal dropping cylinder 100.

[0040] The arc-shaped scraper 401 is provided with a rubber scraping head 402, and the rubber scraping head 402 is attached to the upper surface of the cantilever 101. The rubber scraping head 402 can reduce the gap between the arc-shaped scraper 401 and the cantilever 101, making the cleaning more effective.

[0041] The arc-shaped scraper 401 is provided with an arc-shaped groove 404, and the arc-shaped groove 404 is arranged towards the side of the coal dropping cylinder 100. The arc-shaped scraper is designed to be arc-shaped and matches the circular shape of the coal dropping cylinder 100, reducing the push rod stroke during cleaning.

[0042] The rubber scraping head 402 is made of rubber material and is arranged along the lower arc edge of the arc-shaped scraper 401. The rubber scraping head 402 is attached to the upper surface of the cantilever 101. The rubber scraping head 402 can reduce the gap between the arc-shaped scraper 401 and the cantilever 101, making the cleaning more effective.

[0043] The connecting bracket 403 includes two groups of connecting short rods 405 and one group of connecting long rods 406. The ends of the two groups of connecting short rods 405 are fixedly connected to the arc-shaped scraper 401 on the side away from the arc-shaped groove 404, and both ends of the connecting long rod 406 are fixedly connected to the side wall near the other end of the connecting short rod 405.

[0044] A slider 302 is provided between the connecting rod 301 and the linear guide 300. The slider 302 is fixedly arranged at the end of the connecting rod 301. A limit switch one 303 is provided on the linear guide 300, and a limit switch two is provided inside the push rod motor 200. The limit switch one 303 is used to detect the situation where the slider 302 on the linear guide 300 moves to the limit position. The limit switch one 303 is used to trigger the polarity reversal of the electrodes of the push rod motor 200, so that the push rod on the push rod motor 200 advances instead of retreats, and the push rod retreats instead of advancing after the limit switch two is triggered. The limit switch one 303 can be arranged at any position on the linear guide 300 according to the on-site installation conditions and requirements, and the position can be adjusted flexibly.

[0045] The cantilever 101 is provided with a rear fixing bracket 202 for the push rod motor and a front fixing bracket 203 for the push rod motor. The push rod motor 100 is fixed by the rear fixing bracket 202 for the push rod motor and the front fixing bracket 203 for the push rod motor. The rear fixing bracket 202 for the push rod motor is used to fix the motor part at the tail end of the push rod motor 200, and the front fixing bracket 203 for the push rod motor is used to define the linear direction when the push rod advances or retreats, so that it will not deviate due to other forces.

[0046] There are two sets of connecting sections 407 arranged vertically on the arc-shaped scraper 401 between the two sets of connecting short rods 405. A connecting shaft 408 is arranged between the two sets of connecting sections 407. The connecting shaft 408 is rotatably connected to the end of the push rod 201 on the push rod motor 200. It is convenient to realize the disassembly and connection between the push rod motor 200 and the arc-shaped scraper 401.

[0047] See appendix Figure 3 The guide rail cleaning mechanism includes a mounting bracket 500 arranged at the tail end of the connecting rod 301. A servo motor 501 is fixedly arranged on the mounting bracket 500. A fan 502 is arranged on the output shaft of the servo motor 501. The air outlet of the fan 502 extends out of the connecting rod 301, and can blow and clean the coal dust falling on the linear guide rail 300 when the connecting rod 301 is running, preventing the linear guide rail from accumulating coal dust and affecting the linear operation of the connecting rod 301.

[0048] The working principle of the push rod motor 200 is as follows: After the motor is decelerated by gears, it drives a pair of lead screw nuts. The rotational motion of the motor is changed into a linear motion, and the push rod action is completed by using the forward and reverse rotation of the motor. Complex actions such as rotation and rocking can be completed through various mechanisms such as levers, rockers or connecting rods. By changing the length of the lever arm, the stroke can be increased or enlarged.

[0049] The working principle of the present utility model is as follows: When automatic cleaning work is to be carried out, the upper computer issues an instruction to the PLC of the turbine full-automatic control system, and the PLC then drives the push rod motor 200 (driving as soon as it is powered on). The push rod 201 on the push rod motor 200 advances, driving the arc-shaped scraper 401 to advance, and the connecting rod 301 advances synchronously along the linear guide rail 300 (the scraper knot 400 is fixed to the end of the connecting rod 301, and the connecting rod 301 is arranged on the linear guide rail 300. The beneficial point is that the arc-shaped scraper 401 is in balanced force and walks in a straight line during the cleaning process), driving the slider 302 to advance. When the slider 302 reaches the limit switch 1 303, the signal of the limit switch 1 303 is triggered, and the signal is sent to the PLC, and the PLC stops supplying power to the push rod motor 200.

[0050] Beneficial effects: (1) An electric mechanism is designed to remotely control and automatically clean the coal dust near the coal dropping cylinder under the cantilever belt; (2) The daily maintenance work of the present utility model is simple, and the replacement of easily worn parts is convenient; (3) The design of the arc-shaped scraper and the rubber scraper head can effectively clean the coal dust near the coal dropping cylinder; (4) The connecting bracket is in a U-shaped structure, which is convenient to realize the stable connection between the connecting rod, the push rod motor and the arc-shaped scraper.

Claims

1. An automatic coal dust cleaning device for the coal dropping pipe of a bucket wheel stacker-reclaimer, characterized in that It includes a cantilever connected to the coal dropping chute. A push rod motor is fixedly installed on the cantilever. The end of the push rod on the push rod motor is hinged with a scraper structure. A linear guide rail is provided on each side of the push rod motor. A connecting rod is slidably arranged on the linear guide rail. The end of the connecting rod close to the coal dropping chute is fixedly connected to the scraper structure.

2. The automatic coal dust cleaning device for the coal dropping pipe of a bucket wheel stacker-reclaimer according to claim 1, wherein The scraper structure includes an arc-shaped scraper and a connecting bracket arranged on the arc-shaped scraper.

3. The automatic coal dust cleaning device for the coal dropping pipe of a bucket wheel stacker-reclaimer according to claim 2, characterized in that, The arc-shaped scraper is provided with rubber scraping heads, and the rubber scraping heads are attached to the upper surface of the cantilever.

4. The automatic coal dust cleaning device for the coal dropping pipe of the bucket wheel stacker-reclaimer according to claim 3, characterized in that, The arc-shaped scraper is provided with an arc-shaped groove, and the arc-shaped groove is arranged towards the coal dropping chute side.

5. The automatic coal dust cleaning device for the coal dropping pipe of a bucket wheel stacker-reclaimer according to claim 2, characterized in that, The connecting bracket includes two groups of connecting short rods and one group of connecting long rods. The ends of the two groups of connecting short rods are fixedly connected to the arc-shaped scraper on the side away from the arc-shaped groove. Both ends of the connecting long rod are fixedly connected to the side wall close to the other end of the connecting short rod.

6. The automatic coal dust cleaning device for the coal dropping pipe of a bucket wheel stacker-reclaimer according to any one of claims 1-5, characterized in that A slider is arranged between the connecting rod and the linear guide rail. The slider is fixedly arranged at the end of the connecting rod. A limit switch I is arranged on the linear guide rail, and a limit switch II is arranged inside the push rod motor.

7. An automatic coal dust cleaning device for the coal chute of a bucket wheel stacker-reclaimer according to claim 1, characterized in that, A push rod motor rear fixing bracket and a push rod motor front fixing bracket are arranged on the cantilever. The push rod motor is fixed by the push rod motor rear fixing bracket and the push rod motor front fixing bracket.

8. The automatic coal dust cleaning device for the coal dropping pipe of a bucket wheel stacker-reclaimer according to claim 6, characterized in that, Two sets of connecting sections arranged up and down are provided on the scraper between the two groups of connecting short rods. A connecting shaft is arranged between the two sets of connecting sections, and the connecting shaft is rotatably connected to the end of the push rod of the push rod motor.

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