CN113199975A

CN113199975A - Ore auxiliary unloading equipment on mining dump truck

Info

Publication number: CN113199975A
Application number: CN202110657520.XA
Authority: CN
Inventors: 杨辉; 赵乾杨; 叶永旺
Original assignee: Henan Yuexin Intelligent Machinery Co ltd
Current assignee: Henan Yuexin Intelligent Machinery Co ltd
Priority date: 2021-06-12
Filing date: 2021-06-12
Publication date: 2021-08-03
Anticipated expiration: 2041-06-12
Also published as: CN113199975B

Abstract

The invention relates to the field of mining dump trucks, and particularly discloses ore auxiliary unloading equipment on a mining dump truck. Through installation push mechanism for the in-process of unloading, the push pedal can promote piling up the joint at the inside ore of hopper for the efficiency that the ore was emptyd has avoided the ore to be difficult to the phenomenon that drops downwards behind the inside joint of hopper, improves the efficiency of emptying the ore.

Description

Ore auxiliary unloading equipment on mining dump truck

Technical Field

The invention relates to unloading equipment, in particular to ore auxiliary unloading equipment on a mining dump truck, and belongs to the field of ore dump trucks.

Background

The mining dump truck is a common engineering instrument in the ore mining process, has large volume, stable gravity center and large carrying capacity, can carry a large amount of ores at one time, and is popular in the ore mining industry. The main purpose of a mining dump truck in use is to transport ore from a pit to a designated location for dumping.

The existing ore dumper can produce a large amount of dust in the process of dumping ores and discharging, and the dust drifts in the air, so that the environment is polluted to a certain extent. The ore is easy to extrude and clamp in the dump truck due to accumulation, so that part of the ore is not easy to fall off from the dump truck in the unloading process, the unloading is insufficient, and the unloading efficiency is influenced.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides ore auxiliary unloading equipment on a mining dump truck.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides an ore auxiliary unloading equipment on mining dump truck, is including installing the push mechanism in the hopper inside, extrusion mechanism is all installed to the inside both sides of hopper, and clearance mechanism is all installed to the outside both sides of hopper, and the top of hopper still slidable mounting has dust removal mechanism.

Push mechanism includes the push pedal, and push pedal slidable mounting is in the inside of hopper, and the moving direction of push pedal is unanimous with the length direction of hopper, and the push pedal is provided with a plurality of wind hole towards one side of hopper direction of unloading, and clearance mechanism includes the gasbag, and the wind hole passes through pipeline and gasbag through connection.

The extrusion mechanism comprises a plurality of push rods, one end of each push rod can be in contact with the push plate, one end of each push rod is pressed by the push plate, the other end of each push rod extrudes the air bag, and the push rods are movably mounted in the side walls of the hopper.

Optionally, the outer walls of the two sides of the hopper are provided with loading cavities along the length direction, the air bag is placed inside the loading cavities, and one end of the push rod facing the outer side of the hopper can extend into the loading cavities.

Optionally, the inner wall of the hopper and the installation position of the push rod are both provided with a first through hole and a second through hole, the first through hole and the second through hole are concentrically arranged, the diameter of the first through hole is smaller than that of the second through hole, the first through hole faces the inside of the hopper, the second through hole faces the outside of the hopper, and the push rod is inserted into the first through hole and the second through hole.

Optionally, the push rod is connected with a first outer ring plate at the outer wall of the end of the second through hole, and a plurality of first return springs are connected between one side of the first outer ring plate and the side wall of the end at the intersection of the first through hole and the second through hole.

Optionally, a start-stop switch is installed in the inner wall of the second through hole on any side far away from the discharge end of the hopper, the first outer ring plate can press the start-stop switch, and a ball is installed at one end, far away from the air bag, of the push rod.

Optionally, a hydraulic column is installed on one side of the push plate, which is far away from the discharge end of the hopper, and a fixed end of the hydraulic column is installed outside the hopper.

Optionally, the two sides and the bottom of the outer wall of the push plate are both connected with rubber pads, and two sets of positioning assemblies for fixing the rubber pads are mounted on the two sides and the lower portion of the outer wall of the push plate.

Optionally, the locating component includes adjusting bolt and inserted bar, and the inside of push pedal and the installation department of inserted bar are provided with the mounting hole, and inserted bar movable mounting has the locating plate in the inside of mounting hole, the inside fixed mounting of mounting hole, and the inserted bar runs through the one end outer wall connection that faces the rubber pad from the locating plate has the outer ring plate of second, installs a plurality of second return springs between outer ring plate of second and the rubber pad.

Optionally, adjusting bolt and push pedal threaded connection, and the inside of push pedal and adjusting bolt's installation department are provided with and load the storehouse, and the bottom that loads the storehouse extends to the inside that loads the storehouse, and the bottom that loads the storehouse is connected with the cam, and the one end of inserted bar extends to the inside that loads the storehouse can contact with the protruding end of cam, and one side that the rubber pad orientation inserted bar was provided with the recess that is used for the inserted bar to peg graft.

Optionally, dust removal mechanism includes the shielding curtain, the both ends of shielding curtain are connected with first end frame and second end frame respectively, the one end of unloading is kept away from at the hopper top to second end frame fixed mounting, first end frame and hopper slidable mounting, the top both sides of hopper all are provided with the sliding tray along length direction, the bottom both ends of first end frame all are connected with the bracing piece, electronic slider is installed to the bottom of bracing piece, electronic slider slidable mounting is in the inside of sliding tray, a plurality of shower nozzle is installed to the top below of first end frame, the shower nozzle leads to pipe to be connected with the delivery port of the inside water pump of water tank, the water tank is installed in outer wall one side of hopper, electronic slider and water pump all with open and stop the on-off electricity and be connected.

The invention has the beneficial effects that:

1. through installation push mechanism for the in-process of unloading, the push pedal can promote piling up the joint at the inside ore of hopper for the efficiency that the ore was emptyd has avoided the ore to be difficult to the phenomenon that drops downwards behind the inside joint of hopper, improves the efficiency of emptying the ore.

2. Through setting up extrusion mechanism and clearance mechanism for the ball of push rod tip is pressed to both sides to the push pedal when the inside of hopper removes, can produce certain vibrations after push pedal and the ball contact, and the vibrations power of production can promote the joint to pile up the ore together and scatter each other, and the ore can accelerate and drop downwards. Meanwhile, the upper part of the hopper is covered after the shielding curtain is driven to be unfolded, dust generated when the ore is dumped is blocked by the shielding curtain, and the dust cannot float in the air at will and can only be discharged from the discharge opening. Water is sprayed to the ore in dumping from a plurality of spray heads, dust falling treatment can be carried out on the generated dust by sprayed water mist, and meanwhile, the dust generated after the ore is dumped can be reduced, so that the environment protection is facilitated.

3. Through setting up dust removal mechanism, make the push rod receive the back of pressing of push pedal, the one end of push rod is pressed the gasbag, the inside gas of gasbag is discharged from the gas vent, outwards discharge in following a plurality of wind hole afterwards, the combustion gas blows the inside of hopper, blow inside remaining impurity and the ore of hopper, and then make the more abundant comprehensive of the inside clearance of hopper, the inside difficult impurity that remains of hopper, mining self-discharging mine car can load different types of ore at any time, need not clearance once more before the loading, the flexibility in the mining self-discharging mine car work has been improved.

4. Through the outside installation rubber pad at the push pedal for the outside rubber pad of push pedal can be dismantled it if more wearing and tearing take place in work, and change it. Utilize locating component installation rubber pad for the rubber pad is difficult for dropping in the outside of push pedal, and stability can need not glue or other apparatus and fixes.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the hopper structure of the present invention.

Fig. 3 is a side view of fig. 2 of the present invention.

FIG. 4 is a schematic view of the internal structure of the hopper of the present invention.

FIG. 5 is a schematic view of the mounting structure of the push rod and the hopper of the present invention.

FIG. 6 is an enlarged view of detail A in FIG. 4 according to the present invention.

Fig. 7 is a schematic view of a first end frame structure according to the present invention.

FIG. 8 is a schematic diagram of the structure of the push plate of the present invention.

FIG. 9 is an enlarged view of detail B in FIG. 8 according to the present invention.

FIG. 10 is a schematic view of an installation structure of an adjusting bolt and a push plate according to the present invention.

In the figure: 1. a hopper; 2. a loading chamber; 3. a first end frame; 4. a curtain; 5. a second end frame; 6. pushing the plate; 7. a wind hole; 8. a ball bearing; 9. a water tank; 10. a hydraulic column; 11. a first perforation; 12. a first return spring; 13. a first outer ring plate; 14. a start-stop switch; 15. a push rod; 16. a second perforation; 17. a sliding groove; 18. an air bag; 19. an electric slider; 20. a support bar; 21. a spray head; 22. a rubber pad; 23. adjusting the bolt; 24. a cam; 25. positioning a plate; 26. a second return spring; 27. mounting holes; 28. inserting a rod; 29. a second outer ring plate; 30. and (6) loading the bin.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-10, an ore auxiliary unloading device on a mining dump truck comprises a pushing mechanism installed inside a hopper 1, squeezing mechanisms are installed on two sides inside the hopper 1, cleaning mechanisms are installed on two sides outside the hopper 1, and a dust removing mechanism is further installed on the top of the hopper 1 in a sliding manner.

Push mechanism includes push pedal 6, and push pedal 6 slidable mounting is in the inside of hopper 1, and push pedal 6's moving direction is unanimous with the length direction of hopper 1, and push pedal 6 is provided with a plurality of wind hole 7 towards one side of hopper 1 direction of unloading, and clearance mechanism includes gasbag 18, and wind hole 7 passes through pipeline and gasbag 18 through connection.

The extrusion mechanism comprises a plurality of push rods 15, one end of each push rod 15 can be in contact with the push plate 6, one end of each push rod 15 is pressed by the push plate 6, the other end of each push rod 15 extrudes the air bag 18, and the push rods 15 are movably arranged in the side wall of the hopper 1.

As a technical optimization scheme of the invention, the outer walls of two sides of the hopper 1 are respectively provided with the loading cavity 2 along the length direction, the air bag 18 is placed in the loading cavity 2, one end of the push rod 15 facing the outer side of the hopper 1 can extend into the loading cavity 2, the loading cavity 2 facilitates the placement of the air bag 18, and the push rod 15 can press the air bag 18 after being pressed by the push plate 6.

As a technical optimization scheme of the invention, a first through hole 11 and a second through hole 16 are arranged at the installation positions of the inner wall of the hopper 1 and the push rod 15, the first through hole 11 and the second through hole 16 are arranged concentrically, the diameter of the first through hole 11 is smaller than that of the second through hole 16, the first through hole 11 faces the inner part of the hopper 1, the second through hole 16 faces the outer side of the hopper 1, the push rod 15 is inserted into the first through hole 11 and the second through hole 16, and the push rod 15 can move in the two through holes.

As a technical optimization scheme of the invention, the outer wall of the end of the push rod 15, where the second through hole 16 is, is connected with a first outer ring plate 13, a plurality of first return springs 12 are connected between one side of the first outer ring plate 13 and the side wall of the end part, where the first through hole 11 and the second through hole 16 meet, and the first return springs 12 can drive the push rod 15 to return to the original position.

As a technical optimization scheme of the invention, a start-stop switch 14 is arranged in the inner wall of a second through hole 16 on any side far away from the discharge end of the hopper 1, a first outer ring plate 13 can press the start-stop switch 14, a ball 8 is arranged on one end of a push rod 15 far away from an air bag 18, and the start-stop switch 14 can control the operation and the closing of an electric slide block 19 and a water pump after being pressed.

As a technical optimization scheme of the invention, a hydraulic column 10 is arranged on one side of the push plate 6, which is far away from the discharging end of the hopper 1, the fixed end of the hydraulic column 10 is arranged outside the hopper 1, and the hydraulic column 10 can drive the push plate 6 to move in the hopper 1.

As a technical optimization scheme of the invention, two sides and the bottom of the outer wall of the push plate 6 are both connected with rubber pads 22, two groups of positioning assemblies for fixing the rubber pads 22 are respectively arranged on two sides and the lower part of the outer wall of the push plate 6, and the positioning assemblies facilitate the installation of the rubber pads 22 outside the push plate 6.

As a technical optimization scheme of the invention, the positioning assembly comprises an adjusting bolt 23 and an insert rod 28, a mounting hole 27 is formed in the mounting position of the inner part of the push plate 6 and the insert rod 28, the insert rod 28 is movably mounted in the mounting hole 27, a positioning plate 25 is fixedly mounted in the mounting hole 27, the insert rod 28 penetrates through the positioning plate 25 and is connected with a second outer ring plate 29 towards the outer wall of one end of the rubber pad 22, a plurality of second return springs 26 are mounted between the second outer ring plate 29 and the rubber pad 22, and the insert rod 28 can be driven to move in the push plate 6 by screwing the adjusting bolt 23.

As a technical optimization scheme of the invention, the adjusting bolt 23 is in threaded connection with the push plate 6, a loading bin 30 is arranged at the mounting position of the inner part of the push plate 6 and the adjusting bolt 23, the bottom end of the loading bin 30 extends to the inner part of the loading bin 30, the bottom end of the loading bin 30 is connected with the cam 24, one end of the inserted link 28 extends to the inner part of the loading bin 30 and can be contacted with the convex end of the cam 24, a groove for inserting the inserted link 28 is formed in one side, facing the inserted link 28, of the rubber pad 22, and the convex end of the cam 24 is contacted with or separated from the inserted link 28, so that the inserted link 28 can be driven to move.

As a technical optimization scheme of the invention, the dust removing mechanism comprises a shielding curtain 4, two ends of the shielding curtain 4 are respectively connected with a first end frame 3 and a second end frame 5, the second end frame 5 is fixedly arranged at one end of the top of the hopper 1 far away from the discharging material, the first end frame 3 is slidably arranged with the hopper 1, two sides of the top of the hopper 1 are respectively provided with a sliding groove 17 along the length direction, two ends of the bottom of the first end frame 3 are respectively connected with a supporting rod 20, the bottom of the supporting rod 20 is provided with an electric slider 19, the electric slider 19 is slidably arranged in the sliding groove 17, a plurality of nozzles 21 are arranged below the top of the first end frame 3, the nozzles 21 are connected with a water outlet of a water pump in the water tank 9 through a water pipe, the water tank 9 is arranged at one side of the outer wall of the hopper 1, the electric slider 19 and the water pump are both electrically connected with a start-stop switch 14, the dust removing mechanism can reduce dust floating in the air, can be beneficial to the environmental protection.

When the mining dump truck is used, the hopper 1 is installed on the mining dump truck for use, when the mining dump truck moves to a preset position for loading ores, the first end frame 3 is positioned at one end of the hopper 1 far away from unloading materials, the shielding curtain 4 is stored and folded, and the push plate 6 is also positioned at one end of the hopper 1 far away from unloading materials. After the external mining machine puts the ore into the hopper 1, the mining dump truck conveys the ore to a set position for unloading.

In the unloading process, one end of the hopper 1 is jacked upwards by a hydraulic component below the mining dump truck, the unloading end of the hopper 1 rotates below, and then ore in the hopper 1 is dumped outwards. When unloading, the flexible end extension of hydraulic pressure post 10 promotes push pedal 6 outwards, and push pedal 6 can promote piling up the joint in 1 inside ore of hopper for the efficiency that the ore was emptyd has avoided the ore to be difficult to the phenomenon that drops downwards behind 1 inside joint of hopper, improves the efficiency of empting the ore.

The push plate 6 presses the balls 8 at the ends of the push rods 15 on the two sides when moving in the hopper 1, and the balls 8 rotate after contacting with the outer wall of the push plate 6, so that abrasion to a rubber pad 22 on the outer wall of the push plate 6 can be reduced. And the push plate 6 can produce certain vibrations after contacting with ball 8, and the vibrations power of production can promote the joint to pile up the ore of together and scatter each other, and the ore can accelerate to drop downwards. When the push rod 15 close to the second end frame 5 is pushed, the first outer ring plate 13 outside the push rod 15 moves inside the second through hole 16 to press the start/stop switch 14, so that the electric slider 19 and the water pump start to operate. The electric slider 19 drives the first end frame 3 to move towards the discharge end at the upper part of the hopper 1, so as to unfold the curtain 4. The upper portion of hopper 1 is sealed after shielding curtain 4 expandes, and the dust that produces when the ore is emptyd is blockked by shielding curtain 4, and the dust can not float in the air at will, only can outwards discharge from the discharge opening. When first end frame 3 removed, the shower nozzle 21 top was carried with the inside water of water tank 9 to the water pump, and water spouts to the ore in empting from a plurality of shower nozzle 21, and the dust fall processing can be carried out with the dust that produces to the water smoke that sprays, can reduce the dust that the ore produced after empting simultaneously, is favorable to the protection of environment.

Push rod 15 receives push pedal 6's the back of pressing, push rod 15's one end is pressed gasbag 18, the gas of the inside of gasbag 18 is discharged from the gas vent, outwards discharge in following a plurality of wind hole 7, the combustion gas blows the inside of hopper 1, blow 1 inside remaining impurity of hopper and ore, and then make 1 inside clearance of hopper more abundant comprehensive, 1 inside difficult remaining impurity of hopper, mining self-discharging mine car can load different types of ore at any time, need not clearance once more before the loading, the flexibility in the mining self-discharging mine car work has been improved. After the ore has been poured, the pusher 6 moves inside the hopper 1 and returns to the original position. And the push plate 6 presses and pushes the push rod 15 once again in the process of moving back, and the air bag 18 is cleaned once again. After the ball 8 is disengaged from the side wall of the push plate 6, the first return spring 12 can drive the push rod 15 to return to the initial position for the next use. In the process that the push plate 6 moves back, the first outer ring plate 13 presses the start-stop switch 14 again, and the electric sliding block 19 drives the first end frame 3 to move towards the other end on the hopper 1, so that the shielding curtain 4 is accommodated. The water pump also stops running, and the spray head 21 stops spraying water, so that the consumption of water resources is saved. The first outer ring plate 13 does not go over the start-stop switch 14 every time it moves, but it is simply pressed.

The rubber pad 22 on the outside of the push plate 6 can be removed and replaced if it is worn out more during operation. The adjusting bolt 23 is screwed to drive the cam 24 to be separated from one end of the inserted rod 28, and the second return spring 26 drives the inserted rod 28 to move towards one end inside the mounting hole 27, so that one end of the inserted rod 28 is moved out of the rubber pad 22, and the waste rubber pad 22 can be detached and removed. A new rubber pad 22 is installed outside the push plate 6, and then the adjusting bolt 23 is screwed, so that the convex end of the cam 24 is abutted against one end of the inserted rod 28, and one end of the inserted rod 28 is pushed to enter a groove inside the rubber pad 22, and the rubber pad 22 is fixed. The rubber pad 22 is not easy to fall off outside the push plate 6, the performance is stable, and glue or other apparatuses are not needed for fixing.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The ore auxiliary unloading equipment on the mining dump truck comprises a pushing mechanism arranged in a hopper (1), and is characterized in that extrusion mechanisms are arranged on two sides in the hopper (1), cleaning mechanisms are arranged on two sides outside the hopper (1), and a dust removal mechanism is arranged on the top of the hopper (1) in a sliding manner;

the pushing mechanism comprises a push plate (6), the push plate (6) is slidably mounted in the hopper (1), the moving direction of the push plate (6) is consistent with the length direction of the hopper (1), one side, facing the discharging direction of the hopper (1), of the push plate (6) is provided with a plurality of air holes (7), the cleaning mechanism comprises an air bag (18), and the air holes (7) are in through connection with the air bag (18) through a pipeline;

the extrusion mechanism comprises a plurality of push rods (15), one end of each push rod (15) can be in contact with the push plate (6), one end of each push rod (15) is pressed by the push plate (6) and the other end of each push rod extrudes the air bag (18), and the push rods (15) are movably arranged in the side wall of the hopper (1).

2. The ore auxiliary unloading device on the mining dump truck is characterized in that the outer walls of two sides of the hopper (1) are provided with loading cavities (2) along the length direction, air bags (18) are placed inside the loading cavities (2), and one end, facing the outer side of the hopper (1), of the push rod (15) can extend into the loading cavities (2).

3. The ore auxiliary unloading device on the mining dump truck is characterized in that a first through hole (11) and a second through hole (16) are formed in the mounting positions of the inner wall of the hopper (1) and the push rod (15), the first through hole (11) and the second through hole (16) are concentrically arranged, the diameter of the first through hole (11) is smaller than that of the second through hole (16), the first through hole (11) faces the inner portion of the hopper (1), the second through hole (16) faces the outer side of the hopper (1), and the push rod (15) is inserted into the first through hole (11) and the second through hole (16).

4. The ore auxiliary unloading device on the mining dump truck is characterized in that the push rod (15) is connected with a first outer ring plate (13) at the outer wall of the end of the second through hole (16), and a plurality of first return springs (12) are connected between one side of the first outer ring plate (13) and the side wall of the end part of the intersection of the first through hole (11) and the second through hole (16).

5. The ore auxiliary unloading device on the mining dump truck is characterized in that a start-stop switch (14) is installed in the inner wall of a second through hole (16) on any side far away from the unloading end of the hopper (1), the first outer ring plate (13) can press the start-stop switch (14), and a ball (8) is installed on one end, far away from the air bag (18), of the push rod (15).

6. The ore auxiliary unloading device on the mining dump truck as claimed in claim 1, characterized in that a hydraulic column (10) is installed on one side of the push plate (6) far away from the discharging end of the hopper (1), and the fixed end of the hydraulic column (10) is installed outside the hopper (1).

7. The ore auxiliary unloading device on the mining dump truck as claimed in claim 6, wherein two sides and the bottom of the outer wall of the push plate (6) are connected with rubber pads (22), and two groups of positioning assemblies for fixing the rubber pads (22) are arranged on two sides and below the outer wall of the push plate (6).

8. The ore auxiliary unloading device on the mining dump truck as claimed in claim 7, wherein the positioning assembly comprises an adjusting bolt (23) and an insertion rod (28), a mounting hole (27) is formed in the mounting position of the inner portion of the push plate (6) and the insertion rod (28), the insertion rod (28) is movably mounted in the mounting hole (27), a positioning plate (25) is fixedly mounted in the mounting hole (27), the insertion rod (28) penetrates through the positioning plate (25) and is connected with a second outer ring plate (29) towards the outer wall of one end of the rubber pad (22), and a plurality of second return springs (26) are mounted between the second outer ring plate (29) and the rubber pad (22).

9. The ore auxiliary unloading device on the mining dump truck as claimed in claim 8, wherein the adjusting bolt (23) is in threaded connection with the push plate (6), a loading bin (30) is arranged at the mounting position of the inner part of the push plate (6) and the adjusting bolt (23), the bottom end of the loading bin (30) extends to the inner part of the loading bin (30), a cam (24) is connected to the bottom end of the loading bin (30), one end of the inserted link (28) extends to the inner part of the loading bin (30) and can be in contact with the convex end of the cam (24), and a groove for inserting the inserted link (28) is formed in one side, facing the inserted link (28), of the rubber pad (22).

10. The ore auxiliary unloading device on the mining dump truck according to claim 5, wherein the dust removing mechanism comprises a shielding curtain (4), two ends of the shielding curtain (4) are respectively connected with a first end frame (3) and a second end frame (5), the second end frame (5) is fixedly installed at one end of the top of the hopper (1) far away from the unloading, the first end frame (3) is slidably installed with the hopper (1), two sides of the top of the hopper (1) are respectively provided with a sliding groove (17) along the length direction, two ends of the bottom of the first end frame (3) are respectively connected with a support rod (20), the bottom of the support rod (20) is provided with an electric slider (19), the electric slider (19) is slidably installed inside the sliding groove (17), a plurality of spray heads (21) are installed below the top end of the first end frame (3), the spray heads (21) are connected with a water outlet of a water pump inside the water tank (9) through a water pipe, the water tank (9) is installed on one side of the outer wall of the hopper (1), and the electric sliding block (19) and the water pump are electrically connected with the start-stop switch (14).