Coal transportation device with anti-falling function

Abstract

The invention discloses a coal conveying device with an anti-falling function, and relates to the technical field of material treatment, the coal conveying device comprises a rack, a double-shaft motor is fixedly mounted at the top of the rack, a conveying belt is arranged on the surface of the rack, the double-shaft motor rotatably penetrates through the conveying belt, and supporting frames are fixedly mounted on the left side and the right side of the conveying belt; a collecting box is fixedly mounted on the inner side of the rack, and a material collecting device, a water spraying device and a cleaning device are arranged on the surface of the rack; wherein the receiving device comprises a feeding plate, a fixing plate, a stacking plate, a limiting plate, an extrusion rod, an elastic telescopic rod and a push block, the feeding plate is slidably mounted on the inner wall of the fixing plate, the fixing plate is fixedly mounted on the inner side of the rack, and the stacking plate is rotatably mounted at the top of the fixing plate; and therefore, the coal on the stacking plate is concentrated in the center of the feeding plate, the coal is concentrated and collected into a subsequent conveying belt, and the conveying efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of material processing, and specifically to a coal transportation device with an anti-falling function. Background Art

[0002] The coal transportation device with an anti-falling function involves material engineering, mechanical engineering, electrical engineering, automation technology, safety engineering, and environmental protection technology. By comprehensively utilizing the above technologies, a coal conveyor belt system with excellent performance, safety, and reliability can be designed to meet the needs of different industrial sites.

[0003] The patent with the patent announcement number CN209635343U discloses a new type of coal conveying equipment, including a feeding plate, a first conveyor belt, a base, and a transfer box. The right side of the feeding plate is provided with a first conveyor belt, the first conveyor belt is installed on the base, and the right side of the first conveyor belt is provided with a transfer box; the bottom of the transfer box is welded and fixed with a clamping block, the clamping block is slidably installed in a chute, the chute is opened on the bottom inner wall of the installation box, the installation box is a box structure missing the upper side and the right side, and a propulsion mechanism is arranged on the right side of the transfer box; three installation boxes are placed on the second conveyor belt, the second conveyor belt is clamped on the conveyor rollers, and the conveyor rollers are fixed on the upper end surface of the base through installation brackets. This utility model has a simple structure, is convenient for transforming existing equipment, can greatly improve the coal conveying efficiency, reduce the cost during the conveying process at the same time, and has strong market competitiveness.

[0004] In the above patent, after the transfer box in the invention is filled, it is very easy to use a forklift to transport the transfer box away, which greatly improves the coal conveying efficiency. However, the current measuring equipment has the following problems: A large amount of coal will accumulate at the feeding port after overflowing coal enters the conveyor belt. If the accumulation is too much, it will overflow from the feeding port, and due to the excessive accumulation of coal, it is impossible to timely understand the weight of the coal, resulting in a large amount of coal surging in when entering the conveyor belt, thus reducing the subsequent transportation efficiency of the coal. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a coal transportation device with an anti-falling function, which solves the problems raised in the above background art.

[0006] To achieve the above purposes, the present invention is realized through the following technical solutions: A coal transportation device with an anti-falling function includes a frame, a double-shaft motor is fixedly installed at the top of the frame, a conveyor belt is arranged on the surface of the frame, the double-shaft motor rotates through the conveyor belt, support frames are fixedly installed on the left and right sides of the conveyor belt, a collection box is fixedly installed inside the frame, and a material receiving device, a water spraying device, and a cleaning device are arranged on the surface of the frame; Among them, the material receiving device includes a feeding plate, a fixing plate, a stacking plate, a limiting plate, a pressing rod, an elastic telescopic rod and a pushing block. The feeding plate is slidably installed on the inner wall of the fixing plate, the fixing plate is fixedly installed inside the frame, the stacking plate is rotatably installed on the top of the fixing plate, the limiting plate is fixedly installed at the bottom of the fixing plate, the pressing rod is fixedly installed at the bottom of the feeding plate, the elastic telescopic rod is fixedly installed at the bottom of the limiting plate, and the pushing block is rotatably installed at the bottom of the elastic telescopic rod. When the pressing rod descends, it will squeeze the pushing block, causing the top block opened on the pushing block to move upward. During the upward movement of the top block, it continuously presses against the stacking plate.

[0007] According to the above technical solution, a first spring is arranged between the feeding plate and the limiting plate, and the pushing block is provided with a top block. When the weight of the coal pile is too heavy, it will cause the feeding plate to descend, and the feeding plate will drive the pressing rod to descend while descending.

[0008] According to the above technical solution, the water spraying device includes a machine top box, a water tank, a rotating shaft, a semi-gear, a reciprocating rack, a push rod A, a pipeline, a water outlet pipeline, a water blocking plate, a water outlet plate, a piston rod and a water outlet. The machine top box is fixedly installed on the support frame, the water tank is fixedly installed inside the machine top box, the rotating shaft fixedly penetrates the inner and outer walls of the machine top box, the semi-gear is fixedly installed on the surface of the rotating shaft, the reciprocating rack is slidably installed on the surface of the semi-gear, the push rod A is fixedly installed at the bottom of the reciprocating rack, the pipeline fixedly penetrates the inner and outer walls of the water tank, the water blocking plate is fixedly installed on the inner wall of the water outlet pipeline, the water outlet plate is fixedly installed on the front side of the piston rod, the piston rod is slidably installed on the inner wall of the water outlet pipeline, and the water outlet is fixedly installed on the surface of the piston rod away from the pipeline.

[0009] According to the above technical solution, the double-shaft motor is rotationally connected to the rotating shaft through a belt, the semi-gear and the reciprocating rack are meshed, and a second spring is arranged between the water outlet plate and the piston rod. By starting the double-shaft motor, the rotating shaft is driven to rotate through the belt, the rotating shaft rotates to drive the semi-gear to rotate, and the semi-gear rotates to drive the reciprocating rack to move back and forth.

[0010] According to the above technical solution, the water spraying device further includes a rotating rod and a push rod B. The rotating rod is rotatably installed at the bottom of the water outlet. The push rod B is fixedly installed inside the support frame. When the rotating rod touches the push rod B, the rotating rod will be squeezed by the push rod B, causing the rotating rod to rotate backward, so as to achieve the effect of spraying water at multiple angles.

[0011] According to the above technical solution, a first torsion spring is arranged between the rotating rod and the water outlet, and a spray nozzle is arranged at the bottom of the rotating rod.

[0012] According to the above technical scheme, the cleaning device includes a C push rod, a slider, a slide rod, a vibration block, a scraper, a toggle rod, a discharge plate and an arc slider, the C push rod is fixedly installed on the front side of the water outlet, the slider is fixedly installed on the bottom of the set-top box, the slide rod is slidably installed on the bottom of the slider, the vibration block is fixedly installed on the surface of the slide rod, the scraper is fixedly installed on the surface of the slide rod, the toggle rod is fixedly installed on the rear side of the vibration block, the discharge plate is rotatably installed on the rear side of the frame, and the arc slider is fixedly installed on the bottom of the discharge plate near the toggle rod.

[0013] According to the above technical solution, the opposite surface of the sliding rod is set as an inclined surface, and the surface of the scraper is provided with a brush. When the C push rod moves forward, it will contact the inclined surface opened on the sliding block, causing the sliding block to move left and right. When the sliding block moves left and right, it will drive the scraper to scrape left and right, thereby achieving the effect of cleaning the conveyor belt.

[0014] The present invention provides a coal transportation device with an anti-falling function. It has the following beneficial effects: (1) The present invention, through the setting of the material receiving device, allows coal to flow in from the conveyor belt. When the amount of coal is too much, it will fall to the top of the feed plate. When the weight of the coal piled on the feed plate is too heavy, the feed will be pressed down. The feed plate descends to cooperate with the limiting plate and the squeezing rod to squeeze the push block, so that the top block on the push block continuously supports the stacking plate, so that the stacking plates on both sides are closed toward the center, so that the coal on the stacking plates is concentrated in the center of the feed plate, so that the coal is processed centrally.

[0015] (2) (2) The present invention, through the arrangement of the water spraying device, part of the water enters the pipeline under the action of gravity, and the rotating shaft rotates to cooperate with the half gear and the reciprocating rack to push the A push rod to move back and forth, so that the A push rod squeezes the water outlet, and the water outlet squeezes the piston rod, and the piston rod drives the water outlet plate to advance, so that the air in the water outlet pipeline is compressed. When the water outlet plate is reset, the pressure in the water outlet pipeline decreases, and the water in the pipeline is drawn into the water outlet pipeline through the No. 1 one-way valve provided on the water blocking plate, and then drawn into the water outlet through the No. 2 one-way valve provided on the water outlet plate, thereby achieving the effect of intermittent squeezing water spraying, reducing the waste of water resources, and preventing excessive water spraying from causing excessive moisture in the coal to affect subsequent processing.

[0016] (3) The present invention, through the setting of the water spraying device, pushes the water outlet through the A push rod, and the water outlet moves forward while the rotating rod moves forward. When the rotating rod contacts the B push rod, the B push rod squeezes the rotating rod, so that the rotating rod is pushed by the B push rod to achieve multi-angle movement of the spray nozzle, thereby increasing the area covered by the water spray and achieving a better water spraying effect.

[0017] (4) The present invention, through the setting of the cleaning device, pushes the inclined surface on the slide bar through the C push rod, so that the slide bar moves left and right. The left and right movement of the slide bar will drive the scraper and the brush on the scraper to move left and right, so as to achieve the effect of cleaning the conveyor belt and improve the service life of the conveyor belt. When the slide bar is reset, the vibration block on the slide bar will hit the conveyor belt to generate vibration, so that the coal slag remaining on the conveyor belt will fall from the conveyor belt into the collection box below through the vibration generated by the vibration block, so as to achieve the effect of coal slag recovery and improve the efficiency of coal secondary utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial cross-sectional schematic diagram of the material receiving device of the present invention; Figure 3 It is a partial cross-sectional schematic diagram of the water spray device of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement of part A; Figure 5 This is a schematic diagram of the cross-sectional structure of the piston rod of the present invention; Figure 6 It is a partial cross-sectional schematic diagram of the cleaning device of the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the structure of part B in the middle is enlarged; Figure 8 It is a partial cross-sectional schematic diagram of the cleaning device of the present invention; Figure 9 It is a schematic diagram of the position relationship between the scraper and the arc slider in the present invention.

[0019] In the figure: 1, frame; 2, double-axis motor; 3, conveyor belt; 31, support frame; 4, collection box; 501, feed plate; 5011, fixed plate; 502, stacking plate; 503, limit plate; 504, extrusion rod; 505, elastic telescopic rod; 506, push block; 601, top box; 602, water tank; 603, rotating shaft; 604, half gear; 605, reciprocating rack; 606, A push rod; 607, pipeline; 6071, water outlet pipeline; 608, water blocking plate; 609, water outlet plate; 610, piston rod; 611, water outlet; 612, rotating rod; 613, B push rod; 701, C push rod; 702, slider; 703, slide rod; 704, vibration block; 705, scraper; 706, toggle rod; 8, discharge plate; 81, arc slider. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figure 1-2 , an embodiment of the present invention is: a coal transportation device with an anti-falling function. A double-shaft motor 2 is fixedly installed on the top of a frame 1. A conveyor belt 3 is arranged on the surface of the frame 1. The double-shaft motor 2 rotates through the conveyor belt 3. Support frames 31 are fixedly installed on the left and right sides of the conveyor belt 3. A collection box 4 is fixedly installed inside the frame 1. A material receiving device is arranged on the surface of the frame 1; Among them, the material receiving device includes a feeding plate 501, a fixing plate 5011, a stacking plate 502, a limiting plate 503, a pressing rod 504, an elastic telescopic rod 505 and a pushing block 506. The feeding plate 501 is slidably installed on the inner wall of the fixing plate 5011. The fixing plate 5011 is fixedly installed inside the frame 1. The stacking plate 502 is rotatably installed on the top of the fixing plate 5011. The limiting plate 503 is fixedly installed on the bottom of the fixing plate 5011. The pressing rod 504 is fixedly installed on the bottom of the feeding plate 501. The elastic telescopic rod 505 is fixedly installed on the bottom of the limiting plate 503. The pushing block 506 is rotatably installed on the bottom of the elastic telescopic rod 505.

[0022] A first spring is arranged between the feeding plate 501 and the limiting plate 503. The pushing block 506 is provided with a top block. The first spring is arranged to drive the feeding plate 501 and the limiting plate 503 to reset. The top block is arranged to make the pushing block 506 better contact.

[0023] When this embodiment works: Coal is input from the conveyor belt 3. When too much coal accumulates on the conveyor belt 3, the coal will fall onto the surface of the feeding plate 501. When the quantity of the accumulated coal is large and the weight is too heavy, the feeding plate 501 will descend. When the feeding plate 501 descends, it will drive the pressing rod 504 to descend. When the pressing rod 504 descends, it will squeeze the pushing block 506 to rotate. When the pushing block 506 rotates, it will drive the top block to move upward. When the top block moves upward, it will push the stacking plate 502 to rotate upward. When the stacking plate 502 rotates upward, it will guide the coal accumulated on the stacking plate 502 to the top of the feeding plate 501. The coal on the top of the feeding plate 501 will move towards the conveyor belt 3, so as to collect the fallen coal. The two stacking plates 502 close to the center of the feeding plate 501, so that the coal on the stacking plates 502 falls in the middle of the feeding plate 501, and the coal is centrally processed.

[0024] Please refer to Figure 1-5, on the basis of the above embodiments, in another embodiment of the present invention, it further includes a water spraying device. The water spraying device includes a top box 601, a water tank 602, a rotating shaft 603, a semi-gear 604, a reciprocating rack 605, a push rod A 606, a pipeline 607, a water outlet pipeline 6071, a water blocking plate 608, a water outlet plate 609, a piston rod 610, and a water outlet 611. The top box 601 is fixedly installed on the support frame 31. The water tank 602 is fixedly installed inside the top box 601. The rotating shaft 603 fixedly penetrates the inner and outer walls of the top box 601. The semi-gear 604 is fixedly installed on the surface of the rotating shaft 603. The reciprocating rack 605 is slidably installed on the surface of the semi-gear 604. The push rod A 606 is fixedly installed at the bottom of the reciprocating rack 605. The pipeline 607 fixedly penetrates the inner and outer walls of the water tank 602. The water blocking plate 608 is fixedly installed on the inner wall of the water outlet pipeline 6071. The water outlet plate 609 is fixedly installed on the front side of the piston rod (610). The piston rod 610 is slidably installed on the inner wall of the water outlet pipeline 6071. The water outlet 611 is fixedly installed on the surface of the piston rod 610 away from the pipeline 607. The double-shaft motor 2 is rotationally connected to the rotating shaft 603 through a belt. The semi-gear 604 and the reciprocating rack 605 are meshed. A first one-way valve is arranged inside the water blocking plate 608. A second one-way valve is arranged inside the water outlet plate 609. A second spring is arranged between the water outlet plate 609 and the piston rod 610. By arranging the first one-way valve, water can only move in the direction of the water outlet plate 609. By arranging the second one-way valve, water can only move in the direction of the water outlet 611. By arranging the second spring, the water outlet plate 609 and the piston rod 610 are driven to reset.

[0025] The water spraying device further includes a rotating rod 612 and a push rod B 613. The rotating rod 612 is rotatably installed at the bottom of the water outlet 611. The push rod B 613 is fixedly installed inside the support frame 31.

[0026] A first torsion spring is arranged between the rotating rod 612 and the water outlet 611. A spray nozzle is arranged at the bottom of the rotating rod 612. By arranging the first torsion spring, the rotating rod 612 and the water outlet 611 are driven to reset. By arranging the spray nozzle, the area covered by the sprayed water is enlarged.

[0027] When the present embodiment is working, the dual-axis motor 2 is started, and the belt drives the rotating shaft 603 to rotate, the rotating shaft 603 rotates to drive the half gear 604 to rotate, and the half gear 604 rotates to drive the reciprocating rack 605 to move back and forth, and the reciprocating rack 605 moves forward to drive the A push rod 606 to move forward, and the A push rod 606 touches and squeezes the water outlet 611 when it moves forward, and the squeezing of the water outlet 611 will cause the piston rod 610 to move forward, and the piston rod 610 will squeeze the spring between the water outlet plate 609 and the piston rod 610 when it moves forward, so that the water in the pipeline 607 flows into the water outlet plate 609 and the water blocking plate 608 through the one-way valve in the water blocking plate 608, and when the reciprocating rack 605 moves backward, the A push rod 606 will reset. When the A push rod 606 is reset, the water outlet 611 is separated from the squeezing of the A push rod 606, and at the same time, the spring between the water outlet plate 609 and the piston rod 610 is reset and rebounds, pushing the piston rod 610 to reset. When the piston rod 610 is reset, the water outlet plate 609 is driven to reset. The water outlet plate 609 is reset so that the water in the water outlet plate 609 and the water blocking plate 608 flows into the direction of the water outlet 611 through the one-way valve in the water outlet plate 609, thereby achieving a water spraying effect. When the reciprocating rack 605 moves forward, it drives the water outlet 611 to move forward, and at the same time, the rotating rod 612 also moves forward. When the rotating rod 612 contacts the B push rod 613, the rotating rod 612 will be squeezed by the B push rod 613, causing the rotating rod 612 to rotate backward, thereby achieving a multi-angle water spraying effect.

[0028] See also Figure 1-9 On the basis of the above embodiment, another embodiment of the present invention further includes a cleaning device, which includes a C push rod 701, a slider 702, a slide bar 703, a vibration block 704, a scraper 705, a toggle rod 706, a discharge plate 8 and an arc slider 81. The C push rod 701 is fixedly installed on the front side of the water outlet 611, the slider 702 is fixedly installed on the bottom of the set-top box 601, the slide bar 703 is slidably installed on the bottom of the slider 702, the vibration block 704 is fixedly installed on the surface of the slide bar 703, the scraper 705 is fixedly installed on the surface of the slide bar 703, the toggle rod 706 is fixedly installed on the rear side of the vibration block 704, the discharge plate 8 is rotatably installed on the rear side of the frame 1, and the arc slider 81 is fixedly installed on the bottom of the discharge plate 8 near the toggle rod 706.

[0029] The opposite surface of the slide bar 703 is set as an inclined surface, and the surface of the scraper 705 is provided with a brush. The inclined surface allows the slide bar 703 to be contacted more flexibly, and the brush improves the cleaning efficiency of the scraper 705.

[0030] When this embodiment works: when the reciprocating rack 605 moves forward, it drives the water outlet 611 to move forward. At the same time, the C push rod 701 moves forward. When the C push rod 701 moves forward, it will contact the inclined surface formed on the slider 702, causing the slider 702 to move left and right. When the slider 702 moves left and right, it will drive the scraper 705 to scrape left and right, achieving the effect of cleaning the conveyor belt 3. When the slider 702 moves left and right, it will drive the vibration block 704 to move towards the center, thus contacting the support frame 31 to generate vibration. The vibration generated by the support frame 31 will be transmitted to the conveyor belt 3, achieving the effect of vibrating off the coal slag on the conveyor belt 3. When the vibration block 704 moves left and right, it will drive the toggle rod 706 to move left and right. When the toggle rod 706 moves left and right, it will contact the arc surface on the arc slider 81, causing the discharge plate 8 to rotate up and down.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal transport device with an anti-falling function, comprising a frame (1), characterized in that: A double-axis motor (2) is fixedly mounted on the top of the frame (1); a conveyor belt (3) is arranged on the surface of the frame (1); the double-axis motor (2) rotates and passes through the conveyor belt (3); support frames (31) are fixedly mounted on the left and right sides of the conveyor belt (3); a collecting box (4) is fixedly mounted on the inner side of the frame (1); and a material receiving device, a water spraying device and a cleaning device are arranged on the surface of the frame (1); The material receiving device comprises a feed plate (501), a fixed plate (5011), a stacking plate (502), a limiting plate (503), an extrusion rod (504), an elastic telescopic rod (505) and a push block (506); the feed plate (501) is slidably mounted on the inner wall of the fixed plate (5011); the fixed plate (5011) is fixedly mounted on the inner side of the frame (1); the stacking plate (502) is rotatably mounted on the top of the fixed plate (5011); the limiting plate (503) is fixedly mounted on the bottom of the fixed plate (5011); the extrusion rod (504) is fixedly mounted on the bottom of the feed plate (501); the elastic telescopic rod (505) is fixedly mounted on the bottom of the limiting plate (503); and the push block (506) is rotatably mounted on the bottom of the elastic telescopic rod (505).

2. The coal transportation device with anti-falling function according to claim 1 is characterized in that: A No. 1 spring is provided between the feed plate (501) and the limiting plate (503), and the push block (506) is provided with a top block.

3. The coal transportation device with anti-falling function according to claim 2 is characterized in that: The water spray device comprises a set-top box (601), a water tank (602), a rotating shaft (603), a half gear (604), a reciprocating rack (605), a push rod A (606), a pipeline (607), a water outlet pipeline (6071), a water blocking plate (608), a water outlet plate (609), a piston rod (610) and a water outlet (611); the set-top box (601) is fixedly mounted on the top of the support frame (31); the water tank (602) is fixedly mounted inside the set-top box (601); the rotating shaft (603) is fixedly mounted through the inner and outer walls of the set-top box (601); and the half gear (604) is fixedly mounted on the rotating shaft. The reciprocating rack (605) is slidably mounted on the surface of the half gear (604), the A push rod (606) is fixedly mounted on the bottom of the reciprocating rack (605), the pipe (607) is fixedly mounted through the inner and outer walls of the water tank (602), the water blocking plate (608) is fixedly mounted on the inner wall of the water outlet pipe (6071), the water outlet plate (609) is fixedly mounted on the front side of the piston rod (610), the piston rod (610) is slidably mounted on the inner wall of the water outlet pipe (6071), and the water outlet (611) is fixedly mounted on the surface of the piston rod (610) away from the pipe (607).

4. The coal transportation device with anti-falling function according to claim 3 is characterized in that: The dual-axis motor (2) is connected to the rotating shaft (603) via a belt, the half gear (604) is meshed with the reciprocating rack (605), a No. 1 one-way valve is arranged inside the water blocking plate (608), a No. 2 one-way valve is arranged inside the water outlet plate (609), and a No. 2 spring is arranged between the water outlet plate (609) and the piston rod (610).

5. The coal transportation device with anti-falling function according to claim 4 is characterized in that: The water spray device further comprises a rotating rod (612) and a B push rod (613), wherein the rotating rod (612) is rotatably mounted at the bottom of the water outlet (611), and the B push rod (613) is fixedly mounted on the inner side of the support frame (31).

6. The coal transportation device with anti-falling function according to claim 5, characterized in that: A first torsion spring is provided between the rotating rod (612) and the water outlet (611), and a spray nozzle is provided at the bottom of the rotating rod (612).

7. The coal transportation device with anti-falling function according to claim 6 is characterized in that: The cleaning device comprises a C push rod (701), a slider (702), a slide bar (703), a vibration block (704), a scraper (705), a toggle rod (706), a discharge plate (8) and an arc slider (81), wherein the C push rod (701) is fixedly mounted on the front side of the water outlet (611), the slider (702) is fixedly mounted on the bottom of the set-top box (601), the slide bar (703) is slidably mounted on the bottom of the slider (702), the vibration block (704) is fixedly mounted on the surface of the slide bar (703), the scraper (705) is fixedly mounted on the surface of the slide bar (703), the toggle rod (706) is fixedly mounted on the rear side of the vibration block (704), the discharge plate (8) is rotatably mounted on the rear side of the frame (1), and the arc slider (81) is fixedly mounted on the bottom of the discharge plate (8) near the toggle rod (706).

8. The coal transportation device with anti-falling function according to claim 7, characterized in that: The opposite surface of the sliding rod (703) is arranged as an inclined surface, and the surface of the scraper (705) is provided with a brush.

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