Energy-saving quartz sand continuous feeding system and control method thereof

By designing a continuous loading system for quartz sand containing multiple height adjustable conveyors and electric telescopic cylinders, the problem of the maximum height of the existing system cannot be adjusted, flexible adjustment of the hopper height and efficient loading of quartz sand are achieved, and the applicability and energy-saving efficiency of the system are improved.

CN120097072APending Publication Date: 2025-06-06江苏中基鸿业矿业科技有限公司
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Patent Information

Application Number
CN202510389093.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-31
Publication Date
2025-06-06

AI Technical Summary

Technical Problem

The existing quartz sand loading system cannot be adjusted when transporting quartz sand to floors of different heights, and has poor applicability.

Method used

An energy-saving quartz sand continuous loading system is designed, using multiple height-adjustable conveyors and electric telescopic cylinders. Through the cooperation of ropes and movable plates, the height adjustment and rapid rise of the hopper are achieved, and efficient loading operations are completed.

Benefits of technology

It realizes flexible adjustment of the hopper height and efficient loading of quartz sand, improving the applicability and energy-saving efficiency of the system.

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Abstract

The invention discloses an energy-saving type quartz sand continuous feeding system and a control method thereof.The energy-saving type quartz sand continuous feeding system comprises a plurality of conveyors, a fixed frame, a fixed plate, a movable plate, a rope, a hopper, an opening and closing piece, a movable piece, a contact plate, a limiting plate and a movable plate.Before feeding, the rope is movably adjusted along the fixed plate, the horizontal end is pushed to abut against the rope in the fixed plate, and then the continuous feeding of quartz sand is achieved; then the L-shaped plate is moved downwards to be inserted into the inserting hole, so that the horizontal plate tightly abuts against the rope in the fixing plate, and the height of the hopper can be adjusted by adjusting the position of a fixing point of the rope and the fixing plate; due to the fact that one end of the rope is fixed through the fixing piece, one end of the rope is fixed to the fixed plate, the movable plate and the rotary disc move upwards, the other end of the rope ascends, and the ascending distance of the other end of the rope is two times that of the movable plate, the hopper ascends rapidly, and feeding is completed. In this way, high-efficiency and energy-saving feeding efficiency is achieved.
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Description

Technical Field

[0001] The invention relates to the technical field of feeding and conveying structures, in particular to an energy-saving quartz sand continuous feeding system and a control method thereof. Background Art

[0002] There are various types of quartz sand feeding equipment, including vibrating feeders, screw conveyors, bucket elevators, etc. Vibrating feeders use electromagnetic vibration to achieve uniform feeding, which is suitable for scenarios where the feeding amount needs to be precisely controlled; screw conveyors use rotating blades to transport materials, which is suitable for short-distance transportation; bucket elevators are good at vertically lifting materials, which is suitable for transportation between different floors. In addition, vacuum suction machines, pipe chain conveyors and pneumatic conveying equipment also have their own applicable scenarios.

[0003] The existing quartz sand feeding system generally uses an inclined conveyor belt or elevator to transport quartz sand to floors at different heights. The maximum height of this feeding method cannot be adjusted, and its applicability is poor.

[0004] Therefore, we propose an energy-saving quartz sand continuous feeding system and a control method thereof. Summary of the invention

[0005] The purpose of the present invention is to provide an energy-saving quartz sand continuous feeding system to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides an energy-saving quartz sand continuous feeding system, comprising a plurality of conveyors arranged at different heights, a fixed frame is provided at the end of the conveyor, a fixed plate is fixedly connected to the fixed frame, a movable plate is penetrated through the middle of the fixed plate, a rope passing through the fixed plate is slidably matched on the movable plate, one end of the rope is connected and fixed to the fixed frame, and the other end is connected to a hopper, and an opening and closing member is provided on the hopper for contacting the fixed plate to discharge the material from the bottom of the hopper; A moving part, the hopper is fixedly connected to a contact plate that cooperates with the moving part to move the hopper close to the end of the conveyor, the hopper is fixedly connected to a limit plate that slidably cooperates with the movable plate, the movable plate is slidably cooperated with the moving plate, and the limit plate slides on the moving plate through the limit part.

[0007] Furthermore, the fixing frame is in a U-shaped structure, and two electric telescopic cylinders are fixedly connected to the fixing frame, and the telescopic ends of the electric telescopic cylinders are connected and fixed to the movable plate.

[0008] Furthermore, the end of the movable plate is rotatably connected to a turntable that cooperates with the rope.

[0009] Furthermore, a fixing member for fixing the rope is provided in the fixing plate, and the fixing member includes a horizontal plate that is movably inserted into the fixing plate to press the rope, and an L-shaped plate is passed through the fixing plate, and a socket is opened on the horizontal plate to be plugged into and matched with the end of the L-shaped plate.

[0010] Furthermore, a plurality of fixing beads are distributed in the gaps on the rope, and two adjacent fixing beads are clamped at the ends of the horizontal plate.

[0011] Furthermore, the opening and closing part includes two opening and closing plates that cooperate with the bottom of the hopper, and an arc plate that is fixedly connected to the opening and closing plate and presses against the fixed plate. The bottom end of the arc plate is rotatably connected to the hopper, and an elastic support part is rotatably connected between the arc plate and the hopper, and the fixed plate is a T-shaped structure.

[0012] Furthermore, the movable part includes two first wedge plates with gap distribution connected and fixed to the fixed plate, and two second wedge plates with gap distribution are fixedly connected to the bottom of the fixed frame, and the first wedge plates and the second wedge plates are both slidably matched with the contact plate.

[0013] Furthermore, the limiting member includes a compression spring, the movable plate is in a U-shaped structure, the end of the limiting plate is connected to the movable plate via a compression spring, and the movable plate is provided with a T-shaped movable groove for sliding of the movable plate and the limiting plate.

[0014] A control method for an energy-saving quartz sand continuous feeding system. According to the above-mentioned energy-saving quartz sand continuous feeding system, the specific control method includes the following steps: S1. The conveyor at the bottom starts to transfer the quartz sand on the conveyor into the hopper at the bottom, and the quartz sand is filled in the hopper. The conveyor at the bottom stops moving, and the conveyor at the top starts to start, and the electric telescopic cylinder stretches and starts; S2. The hopper filled with quartz sand is moved away from the conveyor in the horizontal direction under the action of the electric telescopic cylinder, and moves upward along the movable plate, so that the hopper moves closer to the conveyor located above; S3, the hopper is moved in the horizontal direction by the moving member, so that the hopper is located above the upper conveyor; S4, the arc plate is pressed against the fixed plate, so that the quartz sand on the hopper is released into the conveyor located above, and the quartz sand is processed; S5. The electric telescopic cylinder contracts, causing the hopper to move downward and be located below the conveyor below. The conveyor above stops starting, and the conveyor below starts starting, thereby completing the loading continuously.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Before loading, adjust the rope along the fixed plate, push the horizontal end against the rope in the fixed plate, and then move the L-shaped plate down and insert it into the socket so that the horizontal plate can press the rope in the fixed plate tightly. This method can adjust the height of the hopper by adjusting the fixed point position of the rope and the fixed plate. The movement of the movable plate drives the turntable upward, thereby driving the rope to move. Since one end of the rope is fixed by a fixing piece, one end of the rope is fixed to the fixed plate. The movable plate and the turntable move upward, causing the other end of the rope to rise, and the rising distance of the other end of the rope is twice the rising distance of the movable plate, so that the hopper rises quickly and the loading is completed. In this way, high-efficiency and energy-saving loading efficiency can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic side view of the internal structure of the fixing frame of the present invention; Figure 3 It is a right side schematic diagram of the overall structure of the present invention; Figure 4 It is a schematic diagram of the split structure of the fixing frame and the fixing plate of the present invention; Figure 5 It is a schematic diagram of the matching structure of the movable plate and the fixed plate of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the fixed plate and the matching of the movable plate of the present invention; Figure 7 It is a schematic diagram of the disassembled structure of the fixing member of the present invention; Figure 8 It is a schematic diagram of the matching structure of the movable plate and the activity plate of the present invention; Fig. 9 It is a schematic diagram of the split structure of the movable plate and the activity plate of the present invention; Fig.10 It is a schematic diagram of the split structure of the limit plate and the movable plate, the opening and closing plate and the hopper of the present invention.

[0017] In the figure: 1. conveyor; 2. fixed frame; 3. fixed plate; 4. movable plate; 5. rope; 6. hopper; 7. contact plate; 8. limit plate; 9. movable plate; 10. electric telescopic cylinder; 11. turntable; 12. horizontal plate; 13. L-shaped plate; 14. jack; 15. fixing bead; 16. opening and closing plate; 17. arc plate; 18. elastic support member; 19. first wedge plate; 20. second wedge plate; 21. compression spring; 22. T-shaped movable groove. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-Figure 10 The present invention provides an energy-saving quartz sand continuous feeding system, comprising a plurality of conveyors 1 arranged at different heights, with blocking rings (not shown in the figure) provided on both sides of the conveyor belt of the conveyor 1 to prevent quartz sand from falling from both sides of the conveyor belt, a fixed frame 2 is provided at the end of the conveyor 1, a fixed plate 3 is fixedly connected to the fixed frame 2, a movable plate 4 is penetrated through the middle of the fixed plate 3, a rope 5 (wire rope or steel strand, etc.) passing through the fixed plate 3 is slidably matched on the movable plate 4, one end of the rope 5 is connected and fixed to the fixed frame 2, and the other end is connected to a hopper 6, and an opening and closing member is provided on the hopper 6 for touching the fixed plate 3 to discharge the material from the bottom of the hopper 6; A moving part, a contact plate 7 is fixedly connected to the hopper 6 and cooperates with the moving part so that the hopper 6 moves close to the end of the conveyor 1. A limit plate 8 is fixedly connected to the hopper 6 and slidably cooperates with the movable plate 4. A moving plate 9 is slidably cooperated in the movable plate 4, and the limit plate 8 slides on the moving plate 9 through the limit part.

[0020] A control method for an energy-saving quartz sand continuous feeding system. According to the above-mentioned energy-saving quartz sand continuous feeding system, the specific control method includes the following steps: S1, start the conveyor 1 located at the bottom first, and the conveyor 1 located at the bottom conveys the quartz sand on the conveyor 1 into the hopper 6 located at the bottom. At this time, the contact plate 7 on the hopper 6 cooperates with the second wedge block, and the top of the hopper 6 is located below the end of the conveyor 1 below, so that the conveyor 1 can convey the quartz sand and drop it into the hopper 6; At this time, the two opening and closing plates 16 press against the bottom of the hopper 6 to block the hopper 6, so that the hopper 6 cannot discharge materials, so that the quartz sand is filled into the hopper 6; Fill the hopper 6 with quartz sand, stop the conveyor 1 at the bottom by remote control, start the conveyor 1 at the top by remote control, and start the electric telescopic cylinder 10 by extension; S2. The hopper 6 filled with quartz sand cooperates with the second wedge plate 20 under the action of the electric telescopic cylinder 10 and the compression spring 21, so that the contact plate 7 switches from being in contact with the second wedge plate 20 to being in contact with the movable plate 4, so that the hopper 6 moves upward and moves away from the conveyor 1 below in the horizontal direction, so as to prevent the hopper 6 moving upward from touching the end of the conveyor 1 below; One end of the rope 5 is fixed, and under the action of the rope 5, the hopper 6 filled with quartz sand is quickly moved to the conveyor 1 located above; S3, the hopper 6 is moved horizontally while rising through the action of the first wedge plate 19 and the compression spring 21, and moves horizontally away from the movable plate 4, so that the hopper 6 moves to the upper part of the conveyor 1 located above; S4, when the hopper 6 moves to the upper part of the conveyor 1, the arc plate 17 presses against the fixed plate 3, so that the opening and closing plate 16 rotates, and the blockage of the bottom of the hopper 6 is released, so that the quartz sand on the hopper 6 is released into the conveyor 1, so as to facilitate the transportation of the quartz sand for the next processing; S5, the electric telescopic cylinder 10 contracts, so that the hopper 6 that has released the quartz sand moves downward, the arc plate 17 moves away from the fixed plate 3, and under the action of the elastic support member 18, the opening and closing plates 16 are brought closer to each other, and the bottom of the hopper 6 is re-blocked, and the hopper 6 moves downward, and under the action of the second wedge plate 20, the hopper 6 moves to the bottom of the conveyor 1 located below, and the conveyor 1 located above stops starting, and the conveyor 1 located below starts starting, and the electric telescopic cylinder 10 stops starting, so that the feeding is completed continuously; The fixing frame 2 is in a U-shaped structure. Two electric telescopic cylinders 10 are fixedly connected to the fixing frame 2 . The telescopic ends of the electric telescopic cylinders 10 are fixedly connected to the movable plate 4 .

[0021] In the present application, the electric telescopic rod at the bottom is extended and the electric telescopic cylinder 10 at the top is contracted, so that the movable plate 4 moves up and down relative to the fixed frame 2, and the movable plate 4 penetrates the fixed plate 3 and moves; It is worth noting that: during the whole process, the hopper 6 is always in a horizontal state and does not tilt at an angle.

[0022] The principle of the upward movement of the hopper 6 relative to the movable plate 4 is as follows: The end of the movable plate 4 is rotatably connected to a turntable 11 that cooperates with the rope 5. The movement of the movable plate 4 drives the turntable 11 to move upward, thereby driving the rope 5 to move. Since one end of the rope 5 is fixed by a fixing piece, one end of the rope 5 is fixed to the fixed plate 3, the movable plate 4 and the turntable 11 move upward, causing the other end of the rope 5 to rise, and the rising distance of the other end of the rope 5 is twice the rising distance of the movable plate 4, so that the hopper 6 rises quickly to complete the loading, and in this way, high-efficiency and energy-saving loading efficiency can be achieved.

[0023] Explanation of the up, down, left, and right movements of the hopper 6 while maintaining a horizontal state: The moving part includes two first wedge plates 19 with gap distribution connected and fixed to the fixed plate 3, and two second wedge plates 20 with gap distribution are fixedly connected to the bottom of the fixed frame 2, and the first wedge plate 19 and the second wedge plate 20 are both slidably matched with the contact plate 7; When the rope 5 drives the hopper 6 at the bottom to move upward, the contact plate 7 moves upward along the second wedge plate 20. Under the action of the inclination angle of the second wedge plate 20, the contact plate 7 switches from the state of contacting the second wedge plate 20 to the state of contacting the movable plate 4, so that the hopper 6 moves away from the conveyor 1 in the horizontal direction and approaches the movable plate 4. The limiting member includes a compression spring 21, the movable plate 9 is in a U-shaped structure, the end of the limiting plate 8 is connected to the movable plate 9 through the compression spring 21, and a T-shaped movable groove 22 for sliding of the movable plate 9 and the limiting plate 8 is provided on the movable plate 4; During the process of the hopper 6 and the contact plate 7 switching from the state of contacting the second wedge plate 20 to the state of contacting the movable plate 4, since the U-shaped movable plate 9 moves up and down along the T-shaped movable groove 22, the movable plate 9 cannot change its angle, and the limit plate 8 is horizontally inserted on the movable plate 9, so that the limit plate 8 is always in a horizontal state, and the corresponding hopper 6 is always in a horizontal state; Under the action of the compression spring 21, the limit plate 8 moves toward the inside of the movable plate 4, so that the contact plate 7 is attached to the second wedge plate 20, the movable plate 4 and the first wedge plate 19, ensuring that the hopper 6 enters the upper and lower positions of the conveyor 1, so as to receive the quartz sand from the conveyor 1 below and release the quartz sand to the conveyor 1 above; When the limiting plate 8 slides along the T-shaped movable groove 22 , the limiting plate 8 passes between the two first wedge plates 19 and may pass between the two second wedge plates 20 .

[0024] Instructions on how to fix the rope 5 with the fixing plate 3: A fixing member for fixing the rope 5 is provided in the fixing plate 3, and the fixing member includes a horizontal plate 12 that is movably inserted into the fixing plate 3 and presses the rope 5. An L-shaped plate 13 is penetrated through the fixing plate 3, and a plug hole 14 is provided on the horizontal plate 12 to be plugged and matched with the end of the L-shaped plate 13; Before loading, the rope 5 is adjusted along the fixed plate 3, and the horizontal plate 12 is pushed so that the end of the horizontal plate 12 is pressed against the rope 5 in the fixed plate 3, and then the L-shaped plate 13 is moved down so that the L-shaped plate 13 is inserted into the insertion hole 14 to complete the fixing of the horizontal plate 12 so that the horizontal plate 12 is tightly pressed against the rope 5 in the fixed plate 3. This method can adjust the height of the hopper 6 by adjusting the fixed point position of the rope 5 and the fixed plate 3; The end of the L-shaped plate 13 is in an arc shape. When the end of the L-shaped plate 13 is plugged into the insertion hole 14 , the position of the horizontal plate 12 can be corrected so that the horizontal plate 12 can be tightly pressed against the rope 5 in the fixed plate 3 .

[0025] It is worth noting that: there are multiple fixing beads 15 distributed in the gaps on the rope 5, and two adjacent fixing beads 15 are clamped on the ends of the horizontal plate 12. When the horizontal plate 12 firmly presses the rope 5 in the fixed plate 3, the clamping of two adjacent fixing beads 15 further ensures the pressing and fixing effect of the horizontal plate 12 on the rope 5, wherein the fixing beads 15 can move along the fixed plate 3 with the rope 5.

[0026] Instructions on how to open hopper 6 for discharging: The opening and closing member includes two opening and closing plates 16 that cooperate with the bottom of the hopper 6. The opening and closing plates 16 are fixedly connected with an arc plate 17 that presses against the fixed plate 3. The bottom end of the arc plate 17 is rotatably connected to the hopper 6. An elastic support member 18 is rotatably connected between the arc plate 17 and the hopper 6. The fixed plate 3 is a T-shaped structure. In the process of the contact plate 7 from fitting the movable plate 4 to fitting the first wedge plate 19, the arc plate 17 does not contact the fixed plate 3. When the contact plate 7 completes fitting the first wedge plate 19 and the hopper 6 is located above the conveyor 1 above, the arc plate 17 contacts the fixed plate 3. The hopper 6 that continues to rise reacts against the arc plate 17 under the restriction of the fixed plate 3, so that the top ends of the two arc plates 17 rotate toward each other, and the elastic support member 18 is compressed. The elastic support member 18 can be a plurality of high-strength compression springs. Even if the compression springs are compressed, the two opening and closing plates 16 rotate, and the bottom ends of the two opening and closing plates 16 move away from each other, thereby releasing the blockage of the bottom of the hopper 6 and completing the discharge. When the arc plate 17 is away from the fixed plate 3 , the bottom ends of the two opening and closing plates 16 are brought closer together again under the restoring action of the compression spring, thereby completing the blocking of the bottom of the hopper 6 .

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, control method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, control method, article or device.

[0028] 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. An energy-saving quartz sand continuous feeding system, characterized in that: include: A plurality of conveyors (1) arranged at different heights, wherein a fixed frame (2) is provided at the end of the conveyor (1), a fixed plate (3) is fixedly connected to the fixed frame (2), a movable plate (4) is penetrated through the middle of the fixed plate (3), a rope (5) passing through the fixed plate (3) is slidably fitted on the movable plate (4), one end of the rope (5) is connected and fixed to the fixed frame (2), and the other end is connected to a hopper (6), and the hopper (6) is provided with an opening and closing member that touches the fixed plate (3) to discharge material from the bottom of the hopper (6); A moving part, the hopper (6) is fixedly connected to a contact plate (7) that cooperates with the moving part so that the hopper (6) moves close to the end of the conveyor (1), the hopper (6) is fixedly connected to a limit plate (8) that slidably cooperates with the movable plate (4), the movable plate (4) is slidably cooperated with a moving plate (9), and the limit plate (8) slides on the moving plate (9) through the limit plate.

2. The energy-saving quartz sand continuous feeding system according to claim 1 is characterized in that: The fixed frame (2) has a U-shaped structure, and two electric telescopic cylinders (10) are fixedly connected to the fixed frame (2), and the telescopic ends of the electric telescopic cylinders (10) are connected and fixed to the movable plate (4).

3. The energy-saving quartz sand continuous feeding system according to claim 1 is characterized in that: The end of the movable plate (4) is rotatably connected to a turntable (11) that cooperates with the rope (5).

4. The energy-saving quartz sand continuous feeding system according to claim 1 is characterized in that: The fixing plate (3) is provided with a fixing part for fixing the rope (5), and the fixing part comprises a horizontal plate (12) which is movably inserted into the fixing plate (3) and presses the rope (5). An L-shaped plate (13) is passed through the fixing plate (3), and a socket (14) which is plugged into and matched with the end of the L-shaped plate (13) is provided on the horizontal plate (12).

5. The energy-saving quartz sand continuous feeding system according to claim 4 is characterized in that: A plurality of fixing beads (15) are distributed in the gaps on the rope (5), and two adjacent fixing beads (15) are clamped to the ends of the horizontal plate (12).

6. The energy-saving quartz sand continuous feeding system according to claim 1 is characterized in that: The opening and closing member comprises two opening and closing plates (16) which cooperate with the bottom of the hopper (6); an arc-shaped plate (17) which presses against the fixed plate (3) is fixedly connected to the opening and closing plate (16); the bottom end of the arc-shaped plate (17) is rotatably connected to the hopper (6); an elastic support member (18) is rotatably connected between the arc-shaped plate (17) and the hopper (6); and the fixed plate (3) is in a T-shaped structure.

7. The energy-saving quartz sand continuous feeding system according to claim 1 is characterized in that: The moving member comprises two first wedge plates (19) with a gap distribution connected and fixed to the fixed plate (3); the bottom of the fixed frame (2) is fixedly connected to two second wedge plates (20) with a gap distribution; the first wedge plates (19) and the second wedge plates (20) are both slidably matched with the contact plate (7).

8. The energy-saving quartz sand continuous feeding system according to claim 1 is characterized in that: The limiting member comprises a compression spring (21); the movable plate (9) is of a U-shaped structure; the end of the limiting plate (8) is connected to the movable plate (9) via the compression spring (21); and the movable plate (4) is provided with a T-shaped movable groove (22) for the movable plate (9) and the limiting plate (8) to slide.

9. A control method for an energy-saving quartz sand continuous feeding system, characterized in that: According to an energy-saving quartz sand continuous feeding system according to any one of claims 1 to 8, the specific control method comprises the following steps: S1, the conveyor (1) at the bottom is started to transfer the quartz sand on the conveyor (1) into the hopper (6) at the bottom, and the quartz sand is filled in the hopper (6), the conveyor (1) at the bottom stops moving, and the conveyor (1) at the top starts to start, and the electric telescopic cylinder (10) is extended and started; S2, the hopper (6) filled with quartz sand is moved away from the conveyor (1) in the horizontal direction under the action of the electric telescopic cylinder (10), and moves upward along the movable plate (4), so that the hopper (6) moves closer to the conveyor (1) located above; S3, the hopper (6) is moved in a horizontal direction by a moving member, so that the hopper (6) is located above the upper conveyor (1); S4, the arc-shaped plate (17) is pressed against the fixed plate (3), so that the quartz sand on the hopper (6) is released into the conveyor (1) located above, and the quartz sand is processed; S5, the electric telescopic cylinder (10) contracts, causing the hopper (6) to move downward and be located below the conveyor (1) below, and the conveyor (1) located above stops starting, while the conveyor (1) located below starts starting, thereby completing the loading of materials continuously.