High-efficiency silica grading color sorter

Abstract

The present application relates to the technical field of silica color selection, and particularly relates to a high-efficiency silica grading color selector. The high-efficiency silica grading color selector comprises a color selector, a plurality of material guide hoppers arranged on the color selector, a grading mechanism arranged above the color selector, a surface cleaning mechanism arranged in the grading mechanism, and a dredging mechanism arranged in the grading mechanism. The grading mechanism is arranged above the color selector, and the graded material is directly sent into each material guide hopper of the color selector by using a discharge pipe and an extension part of the discharge pipe, so that one-stop continuous operation of silica from grading to color selection is realized, the intermediate transfer link is saved, the overall production efficiency is greatly improved, the equipment floor area is reduced, the dredging block on the mounting plate is driven to reciprocate by the electric sliding block along the electric sliding rail, the material clamped between the oval rods can be pushed out upward by the cooperation of the wedge surfaces on the two sides, the whole dredging process does not need to stop, and the continuity of production is effectively ensured.

Description

Technical Field

[0001] This invention relates to the field of silica color sorting technology, and in particular to a high-efficiency silica grading and color sorting machine. Background Technology

[0002] In existing technologies, silica grading and color sorting are usually separate processes. The material needs to be transferred multiple times to complete the entire process from grading to color sorting. This not only increases the equipment footprint but also reduces the overall production efficiency. In addition, existing screening devices often experience screen hole blockage during the grading process, leading to a decrease in screening efficiency or even shutdown for unblocking. Although some equipment has unblocking structures, unblocking requires stopping the machine, which seriously affects the continuity of production. Summary of the Invention

[0003] In order to overcome the shortcomings of existing technologies, which require materials to be transferred multiple times to complete the entire process from grading to color sorting, affecting the overall production efficiency, and screening devices often experience screen hole blockage during the grading process, leading to a decrease in screening efficiency or even shutdown for unblocking, this invention provides a high-efficiency silica grading and color sorting machine.

[0004] The technical solution of the present invention is: a high-efficiency silica grading and color sorting machine, comprising: a color sorter having a plurality of guide hoppers thereon; a grading mechanism disposed above the color sorter; a surface cleaning mechanism disposed within the grading mechanism; and a unblocking mechanism disposed within the grading mechanism.

[0005] More preferably, the grading mechanism includes a grading box, several elastic units connected to the grading box, a hopper communicating with the grading box, a guide plate and a first tail plate connected to the grading box, a second tail plate connected to the grading box, a first baffle and a second baffle connected to the grading box, a tail hopper connected to the grading box, and three screening units disposed within the grading box; wherein, a vibration motor is installed on the grading box, and the three screening units are distributed from top to bottom, with adjacent screening units corresponding end to end.

[0006] More preferably, the lower side of the guide plate and the grading box are connected together by a first guide plate, and the lower side of the first tail plate and the grading box are connected together by a second guide plate.

[0007] More preferably, the lower side of the first tail plate and the grading box are connected to a first partition, the second baffle and the grading box are connected to a second partition, and the second tail plate and the grading box are connected to a third partition; wherein, a first discharge channel is formed between the first partition and the side wall of the grading box, a second discharge channel is formed between the third partition and the side wall of the grading box, and a third discharge channel is formed between the first partition and the second partition; a discharge pipe is provided at the end of each of the first, second, and third discharge channels, each discharge pipe is provided with a telescopic part, each telescopic part of the discharge pipe is connected to a guide hopper, and all discharge pipes are connected to the grading box.

[0008] More preferably, the front side of the grading box is provided as a detachable front panel, the rear side of the grading box is provided as a hollow rear panel, the rear panel is provided with a number of ribs and forms a number of cavities, and the rear panel is connected to a branch pipe; wherein, each cavity is connected to at least one branch of the branch pipe, and a number of dust suction holes are opened on the front side of the rear panel.

[0009] More preferably, the elastic unit includes a plurality of first springs fixedly connected to the grading box, a plurality of second springs fixedly connected to the grading box, and a mounting bracket fixedly connected to all the first springs and all the second springs together.

[0010] More preferably, the screening unit includes several equidistant partition modules, each partition module including a first electric rotating shaft, an elliptical rod fixedly connected to the rotating part of the first electric rotating shaft, and a fixed cylinder fixedly connected to the elliptical rod.

[0011] More preferably, the unblocking mechanism includes three unblocking units and three monitoring units, each unblocking unit corresponding to one of the screening units, and each monitoring unit corresponding to one of the screening units; each unblocking unit includes several electric slide rails, several electric sliders slidably connected to the several electric slide rails respectively, a mounting plate fixedly connected to all the electric sliders, and several equidistant unblocking blocks fixedly connected to the mounting plate; a protective plate is provided above the mounting plate of each unblocking unit; wherein, the several equidistant unblocking blocks are distributed alternately with the several elliptical rods of the corresponding screening unit.

[0012] More preferably, the monitoring unit includes a monitoring camera installed inside the classification box and a transparent dust cover covering the monitoring camera.

[0013] More preferably, the surface cleaning mechanism includes three cleaning units, respectively disposed in the first discharge channel, the second discharge channel, and the third discharge channel; each cleaning unit includes two second electric rotating shafts connected to the grading box, two adjusting plates fixedly connected to the two second electric rotating shafts, and two mutually symmetrical cleaning modules; each cleaning module includes two front-to-back symmetrical fixed plates, a plurality of electric brush rollers rotatably connected to the two fixed plates, a plurality of elastic telescopic rods respectively connected to the two fixed plates, two stops fixedly connected to the tops of the two fixed plates, and two push blocks fixedly connected to the two adjusting plates; wherein each of the two push blocks cooperates with one of the stops; each electric brush roller is provided with a lever on the side opposite to the cleaning side.

[0014] Beneficial effects: 1. By setting the grading mechanism above the color sorter and using the discharge pipe and its telescopic part to directly feed the graded material into each guide hopper of the color sorter, a one-stop continuous operation from grading to color sorting of silica is realized, eliminating intermediate transfer links, greatly improving overall production efficiency and reducing equipment footprint.

[0015] 2. When material jamming occurs, the electric slider slides along the electric slide rail, causing the unblocking block on the mounting plate to reciprocate. The top of the unblocking block is higher than the highest point of the outer surface of the elliptical rod. Together with the wedge-shaped surfaces on both sides, it can push the material stuck between the elliptical rods upward. The entire unblocking process does not require stopping the machine, effectively ensuring the continuity of production.

[0016] 3. Several electric brush rollers in each cleaning module rotate and their bristles contact the material surface. During the material's descent, they brush and clean the surface to remove adhering dust, preventing a large amount of dust from affecting color sorting. At the same time, the brushes slow down the falling material, preventing it from entering the color sorter channel too quickly and affecting color sorting, and also preventing the material from causing additional damage to the color sorter channel due to excessive speed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the grading box of the present invention; Figure 4 This is a schematic diagram of the combined structure of the first partition, the second partition, the third partition, and the grading box of the present invention; Figure 5 This is a schematic diagram of the combined structure of the guide plate, the first tail plate, and the elliptical rod of the present invention. Figure 6This is a schematic diagram of the combined structure of the electric slide rail, electric slider, mounting plate, and unblocking block of the present invention. Figure 7 This is an enlarged view of area A of the present invention; Figure 8 This is an enlarged view of region B of the present invention; Figure 9 This is an enlarged view of region C of the present invention; Figure 10 This is a three-dimensional structural diagram of the rear side plate and branch pipe combination of the present invention.

[0018] In the attached diagram, the following labels are used: 001-Dust suction hole, 002-First discharge channel, 003-Second discharge channel, 004-Third discharge channel, 1-Color sorter, 101-Guide hopper, 2-Mounting bracket, 3-First spring, 4-Second spring, 5-Grading box, 501-Discharge hopper, 502-Front side plate, 503-Rear side plate, 5031-Rib plate, 504-Branch pipe, 6-Guide plate, 7-First tail plate, 8-Oval rod, 801-First electric rotating shaft, 802-Fixed cylinder, 9-First guide plate, 10-Second guide plate, 11-The third discharge channel, 102-The fourth discharge channel, 103-The fifth discharge channel, 104-The sixth discharge channel, 105-The seventh discharge channel, 106-The tenth discharge channel, 107-The tenth discharge channel, 108-The tenth discharge channel, 109-The tenth discharge channel, 10 ... 12-First baffle, 13-Second baffle, 14-First partition, 15-Second partition, 16-Third partition, 17-Discharge pipe, 1701-Telescopic part, 18-Tail hopper, 19-Electric slide rail, 20-Electric slider, 21-Mounting plate, 22-Draining block, 23-Monitoring camera, 24-Transparent dust cover, 25-Second electric rotating shaft, 26-Adjusting plate, 2601-Push block, 27-Fixing plate, 2701-Block, 28-Elastic telescopic rod, 29-Electric brush roller, 30-Toggle lever, 31-Protective plate. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0020] Example according to Figure 1-10 As shown, this embodiment provides a high-efficiency silica grading and color sorting machine 1, including a color sorter 1, a grading mechanism, a surface cleaning mechanism, and a clearing mechanism: wherein, the color sorter 1 is provided with a plurality of guide hoppers 101; the grading mechanism is provided above the color sorter 1; the surface cleaning mechanism is provided inside the grading mechanism; and the clearing mechanism is provided inside the grading mechanism.

[0021] The grading mechanism includes a grading box 5, several elastic units connected to the grading box 5, a feeding hopper 501 communicating with the grading box 5, a guide plate 6 and a first tail plate 7 connected to the grading box 5, a second tail plate 11 connected to the grading box 5, a first baffle 12 and a second baffle 13 connected to the grading box 5, a tail hopper 18 connected to the grading box 5, and three screening units disposed within the grading box 5. The grading box 5 is equipped with a vibration motor, which drives the grading box 5 and its internal screening units to vibrate and screen the materials. The three screening units are distributed from top to bottom, and the two adjacent screening units are aligned end to end.

[0022] The lower side of the flow guide plate 6 and the grading box 5 are connected together by a first guide plate 9, and the lower side of the first tail plate 7 and the grading box 5 are connected together by a second guide plate 10.

[0023] The first tail plate 7 and the grading box 5 are connected together by a first partition 14, the second baffle 13 and the grading box 5 are connected together by a second partition 15, and the second tail plate 11 and the grading box 5 are connected together by a third partition 16. Wherein, a first discharge channel 002 is formed between the first partition 14 and the side wall of the grading box 5, a second discharge channel 003 is formed between the third partition 16 and the side wall of the grading box 5, and a third discharge channel 004 is formed between the first partition 14 and the second partition 15. Each of the first discharge channel 002, the second discharge channel 003, and the third discharge channel 004 is provided with a discharge pipe 17 at its end. Each discharge pipe 17 is provided with a telescopic part 1701. Each telescopic part 1701 of the discharge pipe 17 is connected to a guide hopper 101. All discharge pipes 17 are connected to the grading box 5. The discharge pipes 17 are connected to the guide hopper 101 through the telescopic part 1701 to avoid the vibration of the grading box 5 affecting the normal operation of the color sorter 1.

[0024] The front side of the grading box 5 is provided with a detachable front side plate 502, and the rear side of the grading box 5 is provided with a hollow rear side plate 503. The rear side plate 503 is provided with a plurality of ribs 5031 and forms a plurality of cavities. The rear side plate 503 is connected to a branch pipe 504. Each cavity is connected to at least one branch pipe of the branch pipe 504. The rear side plate 503 has several dust suction holes 001 on its front side. Each dust suction hole 001 is equipped with a protective net so that dust can pass through while intercepting the fragmented material, thus preventing the dust suction hole 001 from being blocked by the fragmented material. The several dust suction holes 001 are divided into six groups, which correspond to the three screening units, the first discharge channel 002, the second discharge channel 003 and the third discharge channel 004, respectively.

[0025] The elastic unit includes a plurality of first springs 3 fixedly connected to the grading box 5, a plurality of second springs 4 fixedly connected to the grading box 5, and a mounting frame 2 fixedly connected to all the first springs 3 and all the second springs 4. During installation, the mounting frame 2 is fixed by an external frame, and the grading box 5 is supported by the plurality of first springs 3 and second springs 4. When the vibration motor on the grading box 5 is started, the first springs 3 and second springs 4 reciprocate and extend, thereby causing the grading box 5 to vibrate.

[0026] The screening unit includes several equidistant partition modules. Each partition module includes a first electric rotating shaft 801, an elliptical rod 8 fixedly connected to the rotating part of the first electric rotating shaft 801, and a fixed cylinder 802 fixedly connected to the elliptical rod 8. Among them, the first electric rotating shaft 801 of the baffle module of the uppermost screening unit is connected to the guide plate 6, and its fixed cylinder 802 is rotatably connected to the first tail plate 7. The first electric rotating shaft 801 of the partition module of the screening unit located in the middle is rotatably connected to the second guide plate 10, and its fixed cylinder 802 is rotatably connected to the second tail plate 11. The first electric rotating shaft 801 of the partition module of the lowest screening unit is rotatably connected to the first baffle 12, and its fixed cylinder 802 is rotatably connected to the second baffle 13.

[0027] The unblocking mechanism includes three unblocking units and three monitoring units, each of the unblocking units corresponding to one of the screening units, and each of the monitoring units corresponding to one of the screening units; The unblocking unit includes several electric slide rails 19, several electric sliders 20 slidably connected to the several electric slide rails 19, a mounting plate 21 fixedly connected to all the electric sliders 20, and several equidistant unblocking blocks 22 fixedly connected to the mounting plate 21. The electric slide rail 19 of the uppermost unblocking unit is fixedly connected to the first guide plate 9 and the second guide plate 10 through a connecting plate. The electric slide rail 19 of the middle unblocking unit is fixedly connected to the second guide plate 10 and the first baffle 12 through a connecting plate. The electric slide rail 19 of the lowermost unblocking unit is fixedly connected to the first baffle 12 and the second baffle 13 through a connecting plate. Each electric slide rail 19 is located directly below a corresponding elliptical rod 8, which protects the electric slide rail 19 from being damaged by materials. Each unblocking unit has a protective plate 31 above its mounting plate 21. The three protective plates 31 are detachably connected to the guide plate 6, the second guide plate 10 and the first baffle 12 respectively. The protective plates 31 protect the mounting plate 21 and the unblocking block 22 on it, preventing the unblocking block 22 from being damaged prematurely by continuous impact from materials when it is not working. Among them, several equidistant unblocking blocks 22 and several elliptical rods 8 of the corresponding screening unit are distributed at intervals, and the top of the unblocking block 22 is higher than the highest point of the outer surface of the elliptical rod 8. The unblocking block 22 is provided with wedge-shaped surfaces on both sides along the axial direction of the elliptical rod 8, so as to push out the material stuck between the elliptical rods 8 through the wedge-shaped surfaces, thereby realizing unblocking.

[0028] The monitoring unit includes a monitoring camera 23 installed inside the grading box 5 and a transparent dust cover 24 covering the monitoring camera 23. The monitoring camera 23 monitors in real time whether there is any material jamming in the screening unit, so that it can be cleared in time through the unblocking unit.

[0029] The surface cleaning mechanism includes three cleaning units, which are respectively disposed in the first discharge channel 002, the second discharge channel 003 and the third discharge channel 004; The cleaning unit includes two second electric rotating shafts 25 connected to the grading box 5, two adjusting plates 26 respectively fixed to the two second electric rotating shafts 25, and two cleaning modules that are symmetrical to each other. The cleaning module includes two symmetrical fixed plates 27, several electric brush rollers 29 rotatably connected to the two fixed plates 27, several elastic telescopic rods 28 respectively connected to the two fixed plates 27, two stop blocks 2701 respectively fixed to the top of the two fixed plates 27, and two push blocks 2601 respectively fixed to the two adjusting plates 26. Each of the two push blocks 2601 cooperates with one of the stop blocks 2701; each of the electric brush rollers 29 is provided with a lever 30 on the side away from the cleaning side. While the electric brush roller 29 rotates to clean the material surface, the lever 30 moves the bristles of the electric brush roller 29 to perform self-cleaning, ensuring the cleaning effect of the electric brush roller 29 working continuously.

[0030] All components are equipped with removable wear-resistant liners on surfaces that directly impact materials. These liners protect the components, and only periodic replacement of the liners is required.

[0031] During operation, the material is fed into the feeding hopper 501 by the external conveying equipment, and then enters the grading box 5 through the feeding hopper 501. At the same time, the vibration motor installed on the grading box 5 starts, driving the grading box 5 and the three screening units inside it to vibrate together. Under the action of vibration, the material moves down step by step along each screening unit.

[0032] The three screening units are distributed from top to bottom, with adjacent screening units corresponding end to end to form a Z-shaped zigzag screening path. Each screening unit consists of several equidistant partition modules. The elliptical rods 8 of the partition modules can rotate around their own axis under the drive of the first electric rotating shaft 801. By adjusting the orientation of the elliptical cross section of the elliptical rods 8, the gap between two adjacent elliptical rods 8 can be changed, thereby realizing the grading adjustment of silica of different particle sizes. Adjustments can be made in real time during operation or in advance before operation to enhance the adaptability of the screening unit.

[0033] After the material undergoes initial screening in the first-stage screening unit, it is guided by the guide plate 6 and the first guide plate 9 into the second-stage screening unit. After the second-stage screening, it is guided by the second guide plate 10 into the third-stage screening unit. After the third-stage screening, the final tailings are guided by the first baffle 12 and the second baffle 13 into the tailings hopper 18 for discharge. The three different particle size ranges separated by the three-stage screening enter three independent discharge channels: the first discharge channel 002, the second discharge channel 003, and the third discharge channel 004. Each channel is connected to a discharge pipe 17 at its end. Each discharge pipe 17 is connected to the corresponding guide hopper 101 through its telescopic part 1701, thereby feeding the graded materials into the corresponding guide hopper 101 of the color sorter 1. The color sorter 1 performs the final color sorting and purification through different channels. The different channels of the color sorter 1 are equipped with suitable optical sensors and algorithm parameters, and each channel is equipped with an independent adjustable spray valve system to adapt to materials of different particle sizes. Thus, the graded materials of different particle sizes are simultaneously color sorted and purified, which greatly improves the working efficiency.

[0034] During the screening process described above, the rear side plate 503 is connected to a negative pressure dust removal system via a branch pipe 504. Several ribs 5031 inside the rear side plate 503 divide the interior of the rear side plate 503 into several cavities, and each cavity is connected to at least one branch pipe of the branch pipe 504, so that the negative pressure acts on the interior of the grading box 5 through the dust suction hole 001, thereby sucking away the dust generated during the screening process, reducing the dust adhesion on the material surface, facilitating color sorting by the color sorter 1, and reducing the carry-out rate. At the same time, by dividing the several dust suction holes 001 into six groups, corresponding to the three screening units, the first discharge channel 002, the second discharge channel 003, and the third discharge channel 004 respectively, all-round dust removal is achieved.

[0035] To prevent material from getting stuck between adjacent elliptical rods 8 during the screening process, three monitoring cameras 23 are positioned at the three screening units respectively, protected by transparent dust covers 24, to monitor the material flow status of each screening unit in real time. When a screening unit gets stuck, the control system activates the corresponding unblocking unit. The electric slider 20 of the unblocking unit slides back and forth along the electric slide rail 19, driving multiple unblocking blocks 22 on the mounting plate 21 to reciprocate. Each unblocking block 22 is located between adjacent elliptical rods 8, and the top of the unblocking block 22 is higher than the highest point of the outer surface of the elliptical rod 8. Together with the wedge-shaped surfaces on both sides of the unblocking block 22, the material stuck between the elliptical rods 8 is pushed upwards, thereby restoring the screening channel to unobstructed flow.

[0036] After the material is screened and enters three discharge channels, a surface cleaning mechanism cleans the surface of the material conveyed in the channels. Each discharge channel is equipped with a set of cleaning units. The two second electric rotating shafts 25 of the cleaning unit drive two adjusting plates 26 to rotate synchronously to adapt to the adjustment of the gap between two adjacent elliptical rods 8 of the screening unit (in the figure, the gap between two adjacent elliptical rods 8 of the screening unit and the distance between the two adjusting plates 26 are at their maximum distance; therefore, the distance between the two adjusting plates should be reduced during adjustment). At the same time, the push block 2601 on the adjusting plate 26 pushes the stop block 2701 to move the fixed plate 27, so that the elastic telescopic rod 28 is... Compression moves two symmetrically arranged cleaning modules to their appropriate working positions. Several electric brush rollers 29 in each cleaning module rotate, and their bristles contact the material surface. During the material's descent, they brush and clean the surface, removing attached dust. At the same time, the brushes slow down the falling material, preventing it from entering the color sorter 1 channel too quickly and affecting color sorting. They also prevent the material from causing additional damage to the color sorter 1 channel due to excessive speed. While the electric brush rollers 29 are rotating to clean the material, the lever 30 moves the brush bristles to shake off the dust attached to them. Combined with the dust suction effect of the corresponding dust suction hole 001, the brush rollers achieve self-cleaning, ensuring continuous working effect.

[0037] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. A high-efficiency silica grading and color sorting machine, characterized in that, include: Color sorter (1), which is equipped with several guide hoppers (101); A grading mechanism is located above the color sorter (1); A surface cleaning mechanism is disposed within the grading mechanism; and The unblocking mechanism is located within the graded mechanism.

2. The high-efficiency silica grading and color sorting machine according to claim 1, characterized in that, The grading mechanism includes a grading box (5), several elastic units connected to the grading box (5), a feeding hopper (501) connected to the grading box (5), a guide plate (6) and a first tail plate (7) connected to the grading box (5), a second tail plate (11) connected to the grading box (5), a first baffle (12) and a second baffle (13) connected to the grading box (5), a tail hopper (18) connected to the grading box (5), and three screening units disposed in the grading box (5). The grading box (5) is equipped with a vibration motor, and the three screening units are distributed from top to bottom, with the two adjacent screening units corresponding to each other.

3. A high-efficiency silica grading and color sorting machine according to claim 2, characterized in that, The lower side of the flow guide plate (6) and the grading box (5) are connected together by a first guide plate (9), and the lower side of the first tail plate (7) and the grading box (5) are connected together by a second guide plate (10).

4. A high-efficiency silica grading and color sorting machine according to claim 3, characterized in that, The first tail plate (7) and the grading box (5) are connected together by a first partition (14), the second baffle (13) and the grading box (5) are connected together by a second partition (15), and the second tail plate (11) and the grading box (5) are connected together by a third partition (16). Wherein, a first discharge channel (002) is formed between the first partition (14) and the side wall of the grading box (5), a second discharge channel (003) is formed between the third partition (16) and the side wall of the grading box (5), and a third discharge channel (004) is formed between the first partition (14) and the second partition (15). The first discharge channel (002), the second discharge channel (003) and the third discharge channel (004) are each provided with a discharge pipe (17) at the end. Each discharge pipe (17) is provided with a telescopic part (1701). Each telescopic part (1701) of each discharge pipe (17) is connected to a guide hopper (101). All discharge pipes (17) are connected to the grading box (5).

5. A high-efficiency silica grading and color sorting machine according to any one of claims 2-4, characterized in that, The grading box (5) has a detachable front panel (502) on the front side and a hollow rear panel (503) on the rear side. The rear panel (503) has several ribs (5031) inside and forms several cavities. The rear panel (503) is connected to a branch pipe (504). Each cavity is connected to at least one branch pipe of the branch pipe (504). The rear panel (503) has several dust suction holes (001) on the front side.

6. A high-efficiency silica grading and color sorting machine according to claim 2, characterized in that, The elastic unit includes a plurality of first springs (3) fixed to the grading box (5), a plurality of second springs (4) fixed to the grading box (5), and a mounting bracket (2) fixed together with all the first springs (3) and all the second springs (4).

7. A high-efficiency silica grading and color sorting machine according to claim 6, characterized in that, The screening unit includes several equidistant partition modules. Each partition module includes a first electric rotating shaft (801), an elliptical rod (8) fixedly connected to the rotating part of the first electric rotating shaft (801), and a fixed cylinder (802) fixedly connected to the elliptical rod (8).

8. A high-efficiency silica grading and color sorting machine according to claim 7, characterized in that, The unblocking mechanism includes three unblocking units and three monitoring units, each of the unblocking units corresponding to one of the screening units, and each of the monitoring units corresponding to one of the screening units; The unblocking unit includes several electric slide rails (19), several electric sliders (20) that are slidably connected to the several electric slide rails (19), a mounting plate (21) that is fixedly connected to all the electric sliders (20), and several equidistant unblocking blocks (22) that are fixedly connected to the mounting plate (21). Each unblocking unit has a protective plate (31) above its mounting plate (21); Among them, several equidistant unblocking blocks (22) and several elliptical rods (8) of the corresponding screening unit are distributed at intervals.

9. A high-efficiency silica grading and color sorting machine according to claim 8, characterized in that, The monitoring unit includes a monitoring camera (23) installed inside the classification box (5) and a transparent dust cover (24) covering the monitoring camera (23).

10. A high-efficiency silica grading and color sorting machine according to claim 9, characterized in that, The surface cleaning mechanism includes three cleaning units, which are respectively disposed in the first discharge channel (002), the second discharge channel (003) and the third discharge channel (004); The cleaning unit includes two second electric rotating shafts (25) connected to the grading box (5), two adjusting plates (26) respectively fixed to the two second electric rotating shafts (25), and two cleaning modules that are symmetrical to each other; The cleaning module includes two symmetrical fixed plates (27), a plurality of electric brush rollers (29) rotatably connected to the two fixed plates (27), a plurality of elastic telescopic rods (28) respectively connected to the two fixed plates (27), two stops (2701) respectively fixed to the top of the two fixed plates (27), and two push blocks (2601) respectively fixed to the two adjusting plates (26). Each of the two push blocks (2601) is engaged with one of the stop blocks (2701); each of the electric brush rollers (29) is provided with a lever (30) facing away from the cleaning side.

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