A material conveying device for ore screening

Abstract

The present invention discloses a material conveying device for ore screening, which relates to the technical field of ore conveying, and comprises a bracket and a feeding device, wherein a conveying device is fixedly installed on the top of the bracket, a feeding port is fixedly installed on the inner wall of the conveying device, and a buffer plate is fixedly installed on the surface of the bracket; wherein the feeding device comprises a driving device, a transition bucket, a partition plate, an elastic telescopic rod, an air pressure box, an air pressure plate, an air inlet, a sliding block and a protrusion, wherein the driving device drives the transition bucket to move left and right, and the left and right movement of the transition bucket will evenly put the ore into the feeding port, and then the partition plate will divide the ore, the driving device is slidably installed on the surface of the feeding port, the transition bucket is fixedly installed on the output end of the driving device, and the partition plate is fixedly installed on the inner wall of the feeding port to prevent the ores from piling up, which results in the over-pile ore rolling down when the ore is conveyed, which is easy to cause an accident.

Description

Technical Field

[0001] The invention relates to the technical field of ore conveying, in particular to a material conveying device for ore screening. Background Art

[0002] Ore conveyor is a kind of equipment used to transport ore from mines, pits or ore yards to ore processing equipment or ore storage areas. They are usually used in mines, mining sites and ore processing plants to efficiently and safely transport large amounts of ore to where it is needed.

[0003] The patent with the patent announcement number CN211254004U relates to a material conveying device for ore screening, and relates to the field of ore conveying technology. The patent includes ore conveying equipment, buffer equipment and cleaning brushes. The ore conveying equipment includes a conveyor belt, and a conveyor roller is provided inside both ends of the conveyor belt, and a support frame is provided at both ends of the conveyor roller. The conveyor roller and the support frame are rotatably connected, and a connecting plate is fixedly installed between the two support frames. Several groups of linearly arranged limit columns are fixedly installed on the side surface of the conveyor belt, and the number of limit columns in each group is ten. A skirt plate is provided on both sides of the conveyor belt, and a support plate is fixedly installed on one side of the shorter support frame. A drive motor is fixedly installed above the support plate, and the output end of the drive motor is fixedly connected to one end of the lower conveyor roller. By setting a buffer device, the patent can buffer the ore falling from the top of the conveyor belt to prevent the ore from falling directly into the screening machine and causing damage to the screening machine.

[0004] In the above patent, by setting up a buffer device, the ore falling from the top of the conveyor belt can be buffered to prevent the ore from falling directly into the screening machine and causing damage to the screening machine. However, when the ore falls on the conveyor belt, the dust splashed will not only affect the cleanliness of the production environment, but may also cause harm to the health of the workers. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a material conveying device for ore screening, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a material conveying device for ore screening, including a bracket and a feeding device, wherein a conveying device is fixedly installed on the top of the bracket, a feeding port is fixedly installed on the inner wall of the conveying device, and a buffer plate is fixedly installed on the surface of the bracket; wherein the feeding device includes a driving device, a transition bucket, a partition plate, an elastic telescopic rod, an air pressure box, an air pressure plate, an air inlet, a sliding block and a protrusion, wherein the driving device drives the transition bucket to move left and right, and the left and right movement of the transition bucket will evenly put the ore into the feeding port, and then the partition plate will divide the ore, the driving device is slidably installed on the surface of the feeding port, and the transition bucket is fixedly installed on the inner wall of the conveying device. The movable part is fixedly installed on the output end of the driving device, the partition plate is fixedly installed on the inner wall of the feed port, the air pressure box is fixedly installed on the surface of the feed port, the air pressure plate is slidably installed on the inner wall of the air pressure box, the air inlet is fixedly installed on the surface of the air pressure box, the fixed end of the elastic telescopic rod is fixedly installed on the surface of the air pressure plate, the free end of the elastic telescopic rod is fixedly installed on the surface of the transition bucket, the sliding block is slidably installed on the surface of the transition bucket, and the protrusion is fixedly installed on the top of the feed port; wherein, the conveying equipment is provided with a limiting device for preventing the ore from sliding downward, and the transition bucket will push the fixed end of the elastic telescopic rod to move in the direction of the air pressure box, and the fixed end of the elastic telescopic rod moves in the direction of the air pressure box.

[0007] According to the above technical solution, a No. 1 spring is arranged between the air pressure box and the air pressure plate, a one-way valve is arranged inside the air inlet, an air outlet is arranged at the bottom of the air pressure box, a filter plate is arranged on the surface of the air outlet, and a No. 2 spring is arranged between the sliding block and the transition bucket.

[0008] According to the above technical scheme, the limiting device includes a trapezoidal block, a support plate, a limiting column, a support seat, a rotating rod, a curved plate and a connecting plate. The conveying equipment will drive the limiting column to move during transportation, the movement of the limiting column will drive the support seat to move, and the movement of the support seat will drive the rotating rod to move. The trapezoidal block is fixedly installed on the inner wall of the conveying equipment, the support plate is fixedly installed inside the conveying equipment, the limiting column is fixedly installed on the top of the conveying equipment, the support seat is fixedly installed on the top of the limiting column, the rotating rod is rotatably installed inside the support seat, the curved plate is fixedly installed on the top of the rotating rod, and the connecting plate is fixedly installed on the bottom of the rotating rod. The curved plate will drive the connecting plate to rotate upward during the downward rotation, and the upward rotation of the connecting plate will push the ore forward.

[0009] According to the above technical solution, the support plate is in contact with the surface of the conveyor belt, a No. 1 torsion spring is arranged between the rotating rod and the support seat, and the arc plate is in contact with the surface of the trapezoidal block.

[0010] According to the above technical scheme, it also includes a protective device and a cleaning device, the protective device includes a rotating plate, a fixed block, a rack, a gear, a fixed rod, a limit block and a brush, the movement of the limit column drives the fixed block to move, the movement of the fixed block drives the rack to move, the movement of the rack will contact the gear, the rack will push the gear to rotate upward, the rotating plate is rotatably installed at the bottom of the feed port, the fixed block is fixedly installed on the surface of the limit column, the rack is fixedly installed on the top of the fixed block, the gear is rotatably installed on the inner wall of the conveying equipment, the fixed rod is fixedly installed on the surface of the gear, the limit block is fixedly installed on the inner wall of the conveying equipment, the brush is fixedly installed on the inner wall of the conveying equipment, and the brush will be contacted by the rack during the movement.

[0011] According to the above technical solution, a No. 2 torsion spring is arranged between the rotating plate and the feed port, the gear and the rack surface are meshed, the limit block is arranged under the fixed rod, and a No. 3 torsion spring is arranged between the gear and the conveying equipment.

[0012] According to the above technical solution, the cleaning device includes a friction wheel, a round rod, a rotating rod, a rotating plate, a rotating wheel and a collecting trough. The movement of the conveying equipment will drive the friction wheel to rotate, the rotation of the friction wheel will drive the round rod to rotate, the rotation of the round rod will contact the rotating plate, and the round rod will push the rotating plate to rotate downward. The friction wheel is rotatably installed inside the conveying equipment, the round rod is fixedly installed on the surface of the friction wheel, the rotating rod is rotatably installed on the inner wall of the conveying equipment, the rotating plate is fixedly installed on the surface of the rotating rod, the rotating wheel is rotatably installed on the surface of the rotating plate, and the collecting trough is fixedly installed on the surface of the bracket.

[0013] According to the above technical solution, the friction wheel is in contact with the surface of the conveyor belt, and a No. 4 torsion spring is arranged between the rotating rod and the conveying equipment.

[0014] The present invention provides a material conveying device for ore screening, which has the following beneficial effects:

[0015] (1) The invention drives the transition bucket to move by means of a driving device, and uses a partition plate to evenly distribute the ore on the conveyor belt to prevent the ore from being concentrated together, which would cause the ore to roll down due to excessive accumulation during transportation, easily causing accidents. At the same time, the driving device will push the air pressure plate to absorb air during movement, so that the dust splashed by the ore is sucked into the air pressure box to prevent harm to the health of users.

[0016] (2) The invention uses a driving device to drive the limit column to move, and uses the limit column to limit the ore, so that a large amount of dust in the ore can slide down from between the limit columns, thereby preventing a large amount of dust in the ore from entering the screening machine along with the ore, making the screening machine difficult to clean. At the same time, the arc plate contacts the trapezoidal block and rotates downward, thereby limiting the ore and preventing the ore from rolling down from above. At the same time, the rotation process will drive the connecting plate to push the ore forward, so that the ore is evenly distributed and safety is improved.

[0017] (3) This invention uses a rack to contact a gear, so that the gear rotates to drive the fixed rod to rotate, and the fixed rod rotates to push the rotating plate to rotate upward, thereby sealing the feed port and preventing the ore from directly hitting the arc plate, causing damage to the arc plate and affecting the limiting effect. At the same time, when the rack moves, it will contact the brush, and the brush can be used to clean impurities on the rack, thereby improving the maintenance of the rack.

[0018] (4) This invention makes the conveying equipment drive the friction wheel to rotate by the contact between the friction wheel and the conveying equipment. During the rotation of the friction wheel, the rotating plate will be driven to rotate downward, hitting the conveyor belt at the bottom of the conveying equipment, and vibrating the impurities attached to the conveyor belt off, thereby preventing the long-term accumulation of dust and causing damage to the conveyor belt. At the same time, the contact between the rotating wheel and the conveyor belt can reduce the friction with the conveying equipment and increase the service life of the conveying equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall internal structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the air pressure box of the present invention;

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the conveying device of the present invention;

[0023] Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement of part A;

[0024] Figure 6 It is a schematic diagram of the inner wall structure of the conveying device of the present invention;

[0025] Figure 7 For the present invention Figure 6 A schematic diagram of the structure of part B in the middle is enlarged;

[0026] Figure 8 It is a schematic diagram of the structure of the knocking device of the present invention.

[0027] In the figure: 1. bracket; 2. conveying equipment; 3. feed port; 4. buffer plate; 5. driving device; 6. transition bucket; 7. partition plate; 8. elastic telescopic rod; 9. air pressure box; 10. air pressure plate; 11. air inlet; 12. sliding block; 13. protrusion; 141. trapezoidal block; 142. support plate; 143. limiting column; 144. support seat; 145. rotating rod; 146. arc plate; 147. connecting plate; 151. rotating plate; 152. fixed block; 153. rack; 154. gear; 155. fixed rod; 156. limiting block; 157. brush; 161. friction wheel; 162. round rod; 163. rotating rod; 164. rotating plate; 165. rotating wheel; 166. collecting trough. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-5 One embodiment of the present invention is: a material conveying device for ore screening, including a bracket 1, and also including a feeding device, a conveying device 2 is fixedly installed on the top of the bracket 1, a feeding port 3 is fixedly installed on the inner wall of the conveying device 2, and a buffer plate 4 is fixedly installed on the surface of the bracket 1; wherein the feeding device includes a driving device 5, a transition bucket 6, a partition plate 7, an elastic telescopic rod 8, an air pressure box 9, an air pressure plate 10, an air inlet 11, a sliding block 12 and a protrusion 13, which prevents the ores from piling up together, resulting in the ore being piled up too high and rolling down when conveying the ore, which is easy to cause an accident, the driving device 5 is slidably installed on the surface of the feeding port 3, the transition bucket 6 is fixedly installed on the output end of the driving device 5, and the partition plate 7 is fixedly mounted on the inner wall of the feed port 3, the air pressure box 9 is fixedly mounted on the surface of the feed port 3, the air pressure plate 10 is slidably mounted on the inner wall of the air pressure box 9, the air inlet 11 is fixedly mounted on the surface of the air pressure box 9, the fixed end of the elastic telescopic rod 8 is fixedly mounted on the surface of the air pressure plate 10, the free end of the elastic telescopic rod 8 is fixedly mounted on the surface of the transition bucket 6, the sliding block 12 is slidably mounted on the surface of the transition bucket 6, and the protrusion 13 is fixedly mounted on the top of the feed port 3; wherein, the conveying equipment 2 is provided with a limiting device for preventing the ore from sliding downward, the elastic telescopic rod 8 will push the air pressure plate 10 to move inside the air pressure box 9, and the splashing dust will be sucked into the air pressure box 9 through the air inlet 11 to prevent harm to the health of users.

[0030] A No. 1 spring is arranged between the air pressure box 9 and the air pressure plate 10, and a one-way valve is arranged inside the air inlet 11, through which the air inlet 11 can only take in air into the air pressure box 9. An air outlet is arranged at the bottom of the air pressure box 9, and a filter plate is arranged on the surface of the air outlet. A No. 2 spring is arranged between the sliding block 12 and the transition bucket 6. The air pressure plate 10 is reset by the No. 1 spring, and the sliding block 12 is reset by the No. 2 spring, and the dust and air sucked in are separated by the filter plate.

[0031] The limiting device includes a trapezoidal block 141, a support plate 142, a limiting column 143, a support seat 144, a rotating rod 145, an arc plate 146 and a connecting plate 147. The arc plate 146 rotates downward to limit the ore on the conveying equipment 2 to prevent the ore from rolling down during transportation and causing harm. The trapezoidal block 141 is fixedly installed on the inner wall of the conveying equipment 2, the support plate 142 is fixedly installed inside the conveying equipment 2, the limiting column 143 is fixedly installed on the top of the conveying equipment 2, the support seat 144 is fixedly installed on the top of the limiting column 143, the rotating rod 145 is rotatably installed inside the support seat 144, the arc plate 146 is fixedly installed on the top of the rotating rod 145, and the connecting plate 147 is fixedly installed on the bottom of the rotating rod 145, so that the ore is more evenly distributed on the conveying equipment 2, thereby improving the overall transportation efficiency.

[0032] The support plate 142 contacts the surface of the conveyor belt, a first torsion spring is provided between the rotating rod 145 and the supporting seat 144, the arc plate 146 contacts the surface of the trapezoidal block 141, and the rotating rod 145 is driven to reset by the first torsion spring.

[0033] When the present embodiment is working, the transition bucket 6 is driven to move left and right by the driving device 5. The left and right movement of the transition bucket 6 will evenly put the ore into the feed port 3, and then the partition plate 7 will separate the ore to prevent the ore from piling up together, resulting in the ore piling up too high and rolling down when the ore is transported, which is easy to cause an accident. At the same time, when the transition bucket 6 moves left and right, it will push the free end of the elastic telescopic rod 8 to contract. When it contracts to the limit, the transition bucket 6 will push the fixed end of the elastic telescopic rod 8 to move toward the direction of the air pressure box 9. The fixed end of the elastic telescopic rod 8 moves toward the direction of the air pressure box 9. The elastic telescopic rod 8 will push the air pressure plate 10 to move inside the air pressure box 9, and the flying dust will be sucked into the air pressure box 9 through the air inlet 11 to prevent it from causing harm to the health of the users. At the same time, when the transition bucket 6 moves left and right, it will drive the sliding block 12 to move left and right. The sliding block 12 moves left and right and will contact the protrusion 13. The sliding block 12 will vibrate by contacting the protrusion 13 to prevent the ore from being stuck between the transition bucket 6 and the feed port 3, affecting the efficiency of transporting the ore.

[0034] During the transportation process, the conveying equipment 2 will drive the limit column 143 to move, the movement of the limit column 143 will drive the support seat 144 to move, the movement of the support seat 144 will drive the rotating rod 145 to move, the movement of the rotating rod 145 will drive the arc plate 146 to move, and the arc plate 146 will contact the trapezoidal block 141 during the movement, and the trapezoidal block 141 will squeeze the arc plate 146 to rotate downward, and the downward rotation of the arc plate 146 will limit the ore on the conveying equipment 2 to prevent the ore from rolling down during transportation and causing harm. At the same time, when the arc plate 146 rotates downward, it will drive the connecting plate 147 to rotate upward, and the upward rotation of the connecting plate 147 will push the ore forward, so that the ore is more evenly distributed on the conveying equipment 2, thereby improving the overall transportation efficiency.

[0035] See also Figure 1-8 On the basis of the above embodiment, another embodiment of the present invention further includes a protective device and a cleaning device, the protective device includes a rotating plate 151, a fixed block 152, a rack 153, a gear 154, a fixed rod 155, a limit block 156 and a brush 157, which prevent the falling ore from colliding with the arc plate 146. Long-term falling will cause the service life of the arc plate 146 to decrease, affecting the transportation efficiency. The rotating plate 151 is rotatably installed at the bottom of the feed port 3, the fixed block 152 is fixedly installed on the surface of the limit column 143, the rack 153 is fixedly installed on the top of the fixed block 152, the gear 154 is rotatably installed on the inner wall of the conveying equipment 2, the fixed rod 155 is fixedly installed on the surface of the gear 154, the limit block 156 is fixedly installed on the inner wall of the conveying equipment 2, and the brush 157 is fixedly installed on the inner wall of the conveying equipment 2. The debris dropped from the rack 153 will be cleaned up by the brush 157, thereby improving the protection of the rack 153.

[0036] A No. 2 torsion spring is arranged between the rotating plate 151 and the feed port 3, the gear 154 and the rack 153 are surface-engaged, the limit block 156 is arranged below the fixed rod 155, and a No. 3 torsion spring is arranged between the gear 154 and the conveying equipment 2. The No. 2 torsion spring is used to drive the rotating plate 151 to reset, and the No. 3 torsion spring is used to drive the gear 154 to reset.

[0037] The cleaning device includes a friction wheel 161, a round rod 162, a rotating rod 163, a rotating plate 164, a rotating wheel 165 and a collecting trough 166. The friction wheel 161 is rotatably installed inside the conveying device 2, the round rod 162 is fixedly installed on the surface of the friction wheel 161, the rotating rod 163 is rotatably installed on the inner wall of the conveying device 2, the rotating plate 164 is fixedly installed on the surface of the rotating rod 163, the rotating wheel 165 is rotatably installed on the surface of the rotating plate 164, and the collecting trough 166 is fixedly installed on the surface of the bracket 1. The rotating wheel 165 hits the conveyor belt to vibrate off the dust and debris attached to the conveyor belt, thereby preventing the dust from accumulating for a long time and causing damage to the conveyor belt. At the same time, the rotating wheel 165 can reduce the friction with the conveying device 2 and improve the service life of the conveying device 2.

[0038] The friction wheel 161 is in contact with the surface of the conveyor belt, and a No. 4 torsion spring is arranged between the rotating rod 163 and the conveying device 2, and the rotating rod 163 is driven to reset by the No. 4 torsion spring.

[0039] When the present embodiment is working, the movement of the limiting column 143 drives the fixed block 152 to move, and the movement of the fixed block 152 drives the rack 153 to move, and the movement of the rack 153 will contact the gear 154, and the rack 153 will push the gear 154 to rotate upward, and the upward rotation of the gear 154 will drive the fixed rod 155 to rotate upward, and the upward rotation of the fixed rod 155 will push the rotating plate 151 to rotate upward, and the upward rotation of the rotating plate 151 will close the feed port 3 to prevent the feed port 3 from continuously unloading when the arc plate 146 moves below the feed port 3, and the falling ore will collide with the arc plate 146, and the long-term falling will cause the service life of the arc plate 146 to decrease, affecting the transportation efficiency, and the rack 153 will contact the brush 157 during the movement, and the brush 157 will clean up the debris dropped from the rack 153, thereby improving the protection of the rack 153.

[0040] During the conveying process of the conveying device 2, the conveyor belt will contact with the friction wheel 161. The movement of the conveying device 2 will drive the friction wheel 161 to rotate. The rotation of the friction wheel 161 will drive the round rod 162 to rotate. The rotation of the round rod 162 will contact the rotating plate 164. The round rod 162 will push the rotating plate 164 to rotate downward. The downward rotation of the rotating plate 164 will push the rotating wheel 165 to rotate downward. The downward rotation of the rotating plate 164 will push the rotating wheel 165 to rotate downward. The rotating wheel 165 will contact the bottom conveyor belt. The rotating wheel 165 hits the conveyor belt to vibrate off the dust and debris attached to the conveyor belt, thereby preventing the dust from accumulating for a long time and causing damage to the conveyor belt. At the same time, the rotating wheel 165 can reduce the friction with the conveying device 2 and increase the service life of the conveying device 2.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A material conveying device for ore screening, comprising a support (1), characterized in that: It also includes a feeding device, a protective device and a cleaning device, wherein a conveying device (2) is fixedly mounted on the top of the bracket (1), a feeding port (3) is fixedly mounted on the inner wall of the conveying device (2), and a buffer plate (4) is fixedly mounted on the surface of the bracket (1); The feeding device comprises a driving device (5), a transition bucket (6), a partition plate (7), an elastic telescopic rod (8), an air pressure box (9), an air pressure plate (10), an air inlet (11), a sliding block (12) and a protrusion (13), wherein the driving device (5) is slidably mounted on the surface of the feeding port (3), the transition bucket (6) is fixedly mounted on the output end of the driving device (5), the partition plate (7) is fixedly mounted on the inner wall of the feeding port (3), the air pressure box (9) is fixedly mounted on the surface of the feeding port (3), the air pressure plate (10) is slidably mounted on the inner wall of the air pressure box (9), the air inlet (11) is fixedly mounted on the surface of the air pressure box (9), the fixed end of the elastic telescopic rod (8) is fixedly mounted on the surface of the air pressure plate (10), the free end of the elastic telescopic rod (8) is fixedly mounted on the surface of the transition bucket (6), the sliding block (12) is slidably mounted on the surface of the transition bucket (6), and the protrusion (13) is fixedly mounted on the top of the feeding port (3); Wherein, the conveying device (2) is provided with a limiting device for preventing the ore from sliding downwards.

2. A material conveying device for ore screening according to claim 1, characterized in that: A No. 1 spring is arranged between the air pressure box (9) and the air pressure plate (10), a one-way valve is arranged inside the air inlet (11), an air outlet is arranged at the bottom of the air pressure box (9), a filter plate is arranged on the surface of the air outlet, and a No. 2 spring is arranged between the sliding block (12) and the transition bucket (6).

3. A material conveying device for ore screening according to claim 2, characterized in that: The limiting device comprises a trapezoidal block (141), a support plate (142), a limiting column (143), a support seat (144), a rotating rod (145), an arc plate (146) and a connecting plate (147); the trapezoidal block (141) is fixedly mounted on the inner wall of the conveying device (2); the support plate (142) is fixedly mounted inside the conveying device (2); the limiting column (143) is fixedly mounted on the top of the conveying device (2); the support seat (144) is fixedly mounted on the top of the limiting column (143); the rotating rod (145) is rotatably mounted inside the support seat (144); the arc plate (146) is fixedly mounted on the top of the rotating rod (145); and the connecting plate (147) is fixedly mounted on the bottom of the rotating rod (145).

4. A material conveying device for ore screening according to claim 3, characterized in that: The support plate (142) is in surface contact with the conveyor belt, a first torsion spring is provided between the rotating rod (145) and the support seat (144), and the arc plate (146) is in surface contact with the trapezoidal block (141).

5. A material conveying device for ore screening according to claim 4, characterized in that: The protective device comprises a rotating plate (151), a fixed block (152), a rack (153), a gear (154), a fixed rod (155), a limit block (156) and a brush (157); the rotating plate (151) is rotatably mounted on the bottom of the feed port (3); the fixed block (152) is fixedly mounted on the surface of the limit column (143); the rack (153) is fixedly mounted on the top of the fixed block (152); the gear (154) is rotatably mounted on the inner wall of the conveying device (2); the fixed rod (155) is fixedly mounted on the surface of the gear (154); the limit block (156) is fixedly mounted on the inner wall of the conveying device (2); and the brush (157) is fixedly mounted on the inner wall of the conveying device (2).

6. A material conveying device for ore screening according to claim 5, characterized in that: A No. 2 torsion spring is provided between the rotating plate (151) and the feed port (3), the surfaces of the gear (154) and the rack (153) are meshed, the limit block (156) is provided below the fixed rod (155), and a No. 3 torsion spring is provided between the gear (154) and the conveying device (2).

7. A material conveying device for ore screening according to claim 6, characterized in that: The cleaning device comprises a friction wheel (161), a round rod (162), a rotating rod (163), a rotating plate (164), a rotating wheel (165) and a collecting trough (166); the friction wheel (161) is rotatably mounted inside the conveying device (2); the round rod (162) is fixedly mounted on the surface of the friction wheel (161); the rotating rod (163) is rotatably mounted on the inner wall of the conveying device (2); the rotating plate (164) is fixedly mounted on the surface of the rotating rod (163); the rotating wheel (165) is rotatably mounted on the surface of the rotating plate (164); and the collecting trough (166) is fixedly mounted on the surface of the bracket (1).

8. A material conveying device for ore screening according to claim 7, characterized in that: The friction wheel (161) is in contact with the surface of the conveyor belt, and a No. 4 torsion spring is provided between the rotating rod (163) and the conveying device (2).

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