A screening device for producing high-purity quartz sand

Abstract

The present invention belongs to the technical field of quartz sand screening, and specifically refers to a screening device for high-purity quartz sand production, including a cleaning table, a driving frame, a driving shaft, a shaking type aperture filtering mechanism and a throwing force type position limiting and speeding mechanism, wherein the driving frame is symmetrically arranged on both sides of the cleaning table, the shaking type aperture filtering mechanism is arranged on the driving shaft, the throwing force type position limiting and speeding mechanism is arranged at one end of the cleaning table away from the shaking type aperture filtering mechanism, the shaking type aperture filtering mechanism includes a screening mechanism and a driving mechanism, the screening mechanism is arranged outside the driving shaft, and the driving mechanism is arranged on the side wall of the driving frame. The present invention provides a screening device for high-purity quartz sand production, which can replace and adjust the mesh of the screen according to the size of the quartz sand to be screened, can eliminate dust generated during the screening operation, can remove impurities blocked inside the mesh under the action of increased throwing force, and ensure the screening efficiency of the screening net.

Description

Technical Field

[0001] The invention belongs to the technical field of quartz sand screening, and specifically refers to a screening device for producing high-purity quartz sand. Background Art

[0002] Quartz sand is quartz particles made by crushing quartz stone. Quartz stone is a non-metallic mineral, a hard, wear-resistant, chemically stable silicate mineral. Its main mineral component is silicon dioxide. Due to the different particle sizes of quartz sand, quartz sand of different particle sizes has different uses, so they need to be screened out and used separately.

[0003] The existing screening devices for quartz sand production have the following problems:

[0004] The existing screening equipment for quartz sand does not have the function of adjusting the screen mesh, is of single use, and is prone to generate dust and pollute the air during the quartz sand screening process. Secondly, when screening fine quartz sand, the smaller screening holes are easily blocked, thereby affecting the screening efficiency of the quartz sand. Therefore, it cannot meet the existing use requirements of quartz sand screening equipment. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present scheme provides a screening device for the production of high-purity quartz sand, which can replace and adjust the mesh size of the screen according to the specifications of the screened quartz sand, and can eliminate the dust generated during the screening operation. Under the action of increased throwing force, impurities blocked inside the mesh can be removed, thereby ensuring the screening efficiency of the screening net.

[0006] The technical scheme adopted in this scheme is as follows: A screening device for high-purity quartz sand production proposed in this scheme includes a cleaning table, a driving frame, a driving shaft, a shaking type aperture filtering mechanism and a throwing force type position limiting and speeding-up mechanism, wherein the driving frame is symmetrically arranged on both sides of the cleaning table, the shaking type aperture filtering mechanism is arranged on the driving shaft, the throwing force type position limiting and speeding-up mechanism is arranged at the end of the cleaning table away from the shaking type aperture filtering mechanism, the shaking type aperture filtering mechanism includes a screening mechanism and a driving mechanism, the screening mechanism is arranged on the outside of the driving shaft, the driving mechanism is arranged on the side wall of the driving frame, the throwing force type position limiting and speeding-up mechanism includes a drag reduction mechanism, a position limiting mechanism and a force increasing mechanism, the drag reduction mechanism is arranged at the end of the cleaning table away from the shaking type aperture filtering mechanism, the position limiting mechanism is arranged on the drag reduction mechanism, and the force increasing mechanism is arranged at the end of the position limiting mechanism away from the drag reduction mechanism.

[0007] As a further preferred embodiment of the present invention, the screening mechanism includes an assembly plate, a groove, a screening mesh plate, a snap-fitting strip plate, a rotating block and a clamping spring, the assembly plates are symmetrically arranged at both ends of the driving shaft, the assembly plates are slidably arranged on the outside of the driving shaft, the groove is arranged on the side of the assembly plate away from the impurity removal platform, the groove is open at one end, the screening mesh plate is arranged between the assembly plates, the snap-fitting strip plates are symmetrically arranged on both sides of the screening mesh plate, one end of the snap-fitting strip plate away from the screening mesh plate is arranged inside the groove, the rotating block is rotatably arranged on the inner wall of the impurity removal platform outside the driving shaft, and the clamping spring is arranged on the outside of the driving shaft. between the rotating block and the side wall of the assembly plate; the driving mechanism includes a fixed electromagnet, a driving magnet, a sensing block, a proximity switch and a current direction converter, the fixed electromagnet is arranged on a side of the driving frame close to the assembly plate, the driving magnet is symmetrically arranged at one end of the assembly plate close to the fixed electromagnet, the driving magnet and the fixed electromagnet are staggered, the sensing block is symmetrically arranged on the side wall of the assembly plate below the driving magnet, the proximity switch penetrates the side wall of the impurity removal platform below the fixed electromagnet, the sensing block and the proximity switch are staggered, and the current direction converter is arranged on a side of the driving frame away from the impurity removal platform.

[0008] When in use, select a screening mesh plate of suitable aperture and push the assembly plate. The assembly plate slides along the drive shaft close to the side wall of the drive frame through the deformation of the clamping spring. At this time, the spacing between the assembly plates is maximum. Place the screening mesh plate with the locking strips between the grooves and release the assembly plate. The assembly plate clamps and fixes the screening mesh plate through the grooves through the elastic reset of the clamping spring. The locking strips are locked inside the grooves. Add quartz sand with screening to the inside of the screening mesh plate. Then drive the screening mesh plate movement belt to screen the quartz sand inside. The fixed electromagnet is fixed to the side wall of the drive frame and energized to generate magnetism. The fixed electromagnet and the driving magnet on the side wall of one end of the impurity removal platform are set with the same pole, and the fixed electromagnet and the driving magnet at the other end of the impurity removal platform are set with different poles. The fixed electromagnet absorbs the driving magnet at one end of the impurity removal platform through magnetic force, and pushes the driving magnet at the other end of the impurity removal platform through repulsion. The assembly plate drives the screening mesh The plate rotates around the driving shaft and tilts to one end, and the assembly plate drives the sensing block on the side wall of one end to a position opposite to the proximity switch. After the proximity switch senses the sensing block, the current direction converter changes the direction of the current flowing into the fixed electromagnet, and the magnetic pole of the fixed electromagnet changes. At this time, the end of the fixed electromagnet that repels the driving magnet changes to opposite poles attracting each other, and the end of the fixed electromagnet that attracts the driving magnet changes to like poles repelling each other, so that the assembly plate drives the screening mesh plate to rotate and tilt in the opposite direction of the driving shaft, and then the screening mesh plate drives the quartz sand to shake, and the quartz sand swings inside the screening mesh plate, and impurities inside the quartz sand that do not meet the aperture of the screening mesh plate are screened out. As the sensing block continues to contact the proximity switch during shaking, the current direction converter continuously changes the direction of the current entering the fixed electromagnet, thereby prompting the assembly plate to drive the screening mesh plate to shake and screen.

[0009] Preferably, the drag reduction mechanism includes a water storage cylinder, an atomizing pipe, an atomizing motor and an atomizing nozzle. The water storage cylinder is symmetrically arranged on the top side wall of the impurity removal platform. The atomizing pipe runs through the impurity removal platform and is connected to the water storage cylinder. The atomizing motor is symmetrically arranged at both ends of the atomizing pipe. The atomizing nozzle is arranged at the atomizing end of the atomizing motor. The limiting mechanism includes a limiting frame, a limiting groove, an arc nut, an arc rod and a limiting block. Multiple groups of the limiting frames are arranged on the outside of the driving shaft. The limiting groove is arranged on the side wall of the limiting frame. The positioning groove is set through, the arc nut is symmetrically arranged at both ends of the limiting groove, the arc nut is rotatably arranged on the inner wall of the limiting groove, the arc rod is arranged inside the arc nut, the arc rod is threadedly connected with the arc nut, and the end of the arc rod away from the arc nut is slidably arranged inside the limiting frame, and multiple groups of limiting blocks are arranged on the upper walls of both ends of the screening mesh plate; the force boosting mechanism includes a force boosting spring and a force boosting plate, the force boosting springs are symmetrically arranged on both sides of the limiting frame, and the force boosting plate is arranged on the side of the force boosting spring away from the limiting frame.

[0010] When in use, the quartz sand inside the screening mesh plate is prone to generate dust during the screening process, and the atomizing motor draws water from the atomizing tube and the water storage cylinder through the extraction end. The water is atomized by the atomizing motor and sprayed onto the quartz sand inside the screening mesh plate through the atomizing nozzle, and then, under the action of the water mist, the surface of the quartz sand can be wetted, thereby preventing the quartz sand from generating more dust during the screening process. The arc nut is rotated, and the arc nut drives the arc rod to slide along the inside of the limit frame and penetrate the force boosting plate. The arc rod penetrates the inside of the force boosting plate, thereby fixing the elastic force of the force boosting spring, and limiting the shaking range of the screening mesh plate through the arc rod. When the screening mesh plate rotates and tilts, the limit block is driven to contact the arc rod and the force boosting plate, thereby limiting the shaking range of the screening mesh plate.

[0011] Because the impurities and dust inside the quartz sand adhere to each other after absorbing water, larger impurities are easy to block the filter mesh holes of the screening mesh. At this time, the arc nut is rotated in the opposite direction, and the arc nut drives the arc rod to be taken out from the inside of the force-enhancing plate, and the arc rod is retracted into the limit groove. In the initial state, the force-enhancing plate is extended. When the screening mesh plate drives the limit block to contact the force-enhancing plate, the force-enhancing spring is deformed and shortened without the support of the arc rod. After the force-enhancing spring is shortened, a certain thrust is generated, and after the force-enhancing spring rebounds, the screening mesh plate is pushed down quickly, thereby increasing the rotational throwing force of the screening mesh plate, thereby removing the impurities blocked inside the screening mesh plate, and facilitating the screening operation of quartz sand.

[0012] Specifically, a controller is provided on a side wall of the driving frame of the impurity removal platform away from the current direction converter.

[0013] Wherein, the controller is electrically connected to the fixed electromagnet, the proximity switch, the current direction converter and the atomizing motor respectively.

[0014] Furthermore, the model of the current direction converter is CA-33-A15-A1.

[0015] The beneficial effects achieved by adopting the above structure are as follows:

[0016] Compared with the prior art, the present invention adopts an assembled shaking screening method, which can replace the screening mesh plate according to the specifications of quartz sand required by the user, thereby meeting the user's demand for the use of the screened quartz sand, and through the setting of the atomizing motor, under the action of water mist, it can eliminate the floating dust generated on the surface of the quartz sand, and avoid the dust generated by the quartz sand in the screening process to pollute the environment. Secondly, through the setting of the arc rod, the shaking range of the screening mesh plate can be limited, thereby avoiding the quartz sand inside the screening mesh plate from being scattered due to the large shaking amplitude. Finally, under the setting of the adjustable force-enhancing spring, the descending speed of the screening mesh plate can be increased, thereby increasing the rotational throwing force of the screening mesh plate, which is convenient for removing the clumped dust blocked in the sieve holes of the screening mesh plate, thereby ensuring the efficient screening operation of quartz sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0018] Figure 2 This is a bottom-up stereogram of the scheme;

[0019] Figure 3 This is a schematic diagram of the structure of the impurity removal platform of this scheme;

[0020] Figure 4 This is a schematic diagram of the internal structure of this scheme;

[0021] Figure 5 This is the main view of this scheme;

[0022] Figure 6 This is a side view of the scheme;

[0023] Figure 7 This is a top view of the scheme;

[0024] Figure 8 for Figure 7 AA section view of the part;

[0025] Fig. 9 for Figure 7 A cross-sectional view of the BB portion;

[0026] Fig.10 for Figure 3 A magnified structural view of Part I;

[0027] Fig.11 for Figure 4 A magnified structural view of Part II;

[0028] Fig.12 for Figure 2 A magnified structural view of Part III.

[0029] Among them, 1. impurity removal table, 2. driving frame, 3. driving shaft, 4. shaking type hole filtering mechanism, 5. screening mechanism, 6. assembly plate, 7. groove, 8. screening mesh plate, 9. snap-fitting strip plate, 10. rotating block, 11. clamping spring, 12. driving mechanism, 13. fixed electromagnet, 14. driving magnet, 15. induction block, 16. proximity switch, 17. current direction converter, 18. throwing force type limit speed-up mechanism, 19. drag reduction mechanism, 20. water storage cylinder, 21. atomizing tube, 22. atomizing motor, 23. atomizing nozzle, 24. limit mechanism, 25. limit frame, 26. limit groove, 27. arc nut, 28. arc rod, 29. limit block, 30. force increasing mechanism, 31. force increasing spring, 32. force increasing plate, 33. controller.

[0030] The accompanying drawings are used to provide further understanding of the present scheme and constitute a part of the specification. Together with the embodiments of the present scheme, they are used to explain the present scheme and do not constitute a limitation on the present scheme. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiments of the present scheme will be clearly and completely described below in conjunction with the drawings in the embodiments of the present scheme. Obviously, the described embodiments are only part of the embodiments of the present scheme, not all of the embodiments; based on the embodiments in the present scheme, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present scheme.

[0032] In the description of this scheme, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this scheme.

[0033] like Figure 1-Figure 12As shown, the present invention proposes a screening device for high-purity quartz sand production, comprising a cleaning table 1, a driving frame 2, a driving shaft 3, a shaking type pore-dividing filtering mechanism 4 and a throwing force type position-limiting speed-increasing mechanism 18, wherein the driving frame 2 is symmetrically arranged on both sides of the cleaning table 1, the shaking type pore-dividing filtering mechanism 4 is arranged on the driving shaft 3, the throwing force type position-limiting speed-increasing mechanism 18 is arranged at one end of the cleaning table 1 away from the shaking type pore-dividing filtering mechanism 4, and the shaking type pore-dividing filtering mechanism 4 includes a screening mechanism 5 and a driving mechanism 12, the screening mechanism 5 is arranged on the outside of the driving shaft 3, the driving mechanism 12 is arranged on the side wall of the driving frame 2, the throwing force type limiting speed-up mechanism 18 includes a drag reduction mechanism 19, a limiting mechanism 24 and a force increasing mechanism 30, the drag reduction mechanism 19 is arranged at one end of the impurity removal platform 1 away from the shaking type aperture filtering mechanism 4, the limiting mechanism 24 is arranged on the drag reduction mechanism 19, and the force increasing mechanism 30 is arranged at one end of the limiting mechanism 24 away from the drag reduction mechanism 19.

[0034] The screening mechanism 5 includes an assembly plate 6, a groove 7, a screening mesh plate 8, a snap-fit ​​strip plate 9, a rotating block 10 and a clamping spring 11. The assembly plate 6 is symmetrically arranged at both ends of the drive shaft 3, and the assembly plate 6 is slidably arranged on the outside of the drive shaft 3. The groove 7 is arranged on the side of the assembly plate 6 away from the impurity removal platform 1, and the groove 7 is opened at one end. The screening mesh plate 8 is arranged between the assembly plates 6, the snap-fit ​​strip plates 9 are symmetrically arranged on both sides of the screening mesh plate 8, and the end of the snap-fit ​​strip plate 9 away from the screening mesh plate 8 is arranged inside the groove 7. The rotating block 10 is rotatably arranged on the inner wall of the impurity removal platform 1 outside the drive shaft 3, and the clamping spring 11 is arranged between the rotating block 10 outside the drive shaft 3 and the side wall of the assembly plate 6 ; The driving mechanism 12 includes a fixed electromagnet 13, a driving magnet 14, a sensing block 15, a proximity switch 16 and a current direction converter 17. The fixed electromagnet 13 is arranged on the side of the driving frame 2 close to the assembly plate 6, the driving magnet 14 is symmetrically arranged on the end of the assembly plate 6 close to the fixed electromagnet 13, the driving magnet 14 and the fixed electromagnet 13 are staggered, the sensing block 15 is symmetrically arranged on the side wall of the assembly plate 6 below the driving magnet 14, the proximity switch 16 penetrates the side wall of the impurity removal platform 1 below the fixed electromagnet 13, the sensing block 15 and the proximity switch 16 are staggered, and the current direction converter 17 is arranged on the side of the driving frame 2 away from the impurity removal platform 1.

[0035] The drag reduction mechanism 19 includes a water storage cylinder 20, an atomizing tube 21, an atomizing motor 22 and an atomizing nozzle 23. The water storage cylinder 20 is symmetrically arranged on the top side wall of the impurity removal platform 1. The atomizing tube 21 penetrates the impurity removal platform 1 and is connected to the water storage cylinder 20. The atomizing motor 22 is symmetrically arranged at both ends of the atomizing tube 21. The atomizing nozzle 23 is arranged at the atomizing end of the atomizing motor 22; the limiting mechanism 24 includes a limiting frame 25, a limiting groove 26, an arc nut 27, an arc rod 28 and a limiting block 29. Multiple groups of the limiting frames 25 are arranged on the outside of the driving shaft 3, the limiting groove 26 is arranged on the side wall of the limiting frame 25, and the limiting mechanism 24 includes a limiting frame 25, a limiting groove 26, an arc nut 27, an arc rod 28 and a limiting block 29. The groove 26 is set to be through, and the arc nut 27 is symmetrically arranged at both ends of the limit groove 26. The arc nut 27 is rotatably arranged on the inner wall of the limit groove 26. The arc rod 28 is arranged inside the arc nut 27. The arc rod 28 is threadedly connected with the arc nut 27. The end of the arc rod 28 away from the arc nut 27 is slidably arranged inside the limit frame 25. Multiple groups of limit blocks 29 are arranged on the upper walls of both ends of the screening mesh plate 8; the force-enhancing mechanism 30 includes a force-enhancing spring 31 and a force-enhancing plate 32. The force-enhancing spring 31 is symmetrically arranged on both sides of the limit frame 25, and the force-enhancing plate 32 is arranged on the side of the force-enhancing spring 31 away from the limit frame 25.

[0036] A controller 33 is disposed on the side wall of the driving frame 2 at one end of the impurity removal platform 1 away from the current direction converter 17 .

[0037] The controller 33 is electrically connected to the fixed electromagnet 13 , the proximity switch 16 , the current direction converter 17 and the atomizing motor 22 , respectively.

[0038] The model of the current direction converter 17 is CA-33-A15-A1.

[0039] When used specifically, in Example 1, water is poured into the water storage cylinder 20. When screening the medium-coarse quartz sand, a screening mesh plate 8 with a larger aperture is selected to push the assembly plate 6. The assembly plate 6 is deformed by the clamping spring 11 and slides along the drive shaft 3 close to the side wall of the drive frame 2. At this time, the spacing between the assembly plates 6 is the maximum value. The screening mesh plate 8 with the snap-fitting strip plate 9 is placed between the grooves 7. The assembly plate 6 is released. The assembly plate 6 is elastically reset by the clamping spring 11 to clamp and fix the screening mesh plate 8 through the groove 7, and the snap-fitting strip plate 9 is snapped into the groove 7.

[0040] Add quartz sand with screening into the screening mesh plate 8, then drive the screening mesh plate 8 to move to screen the quartz sand inside, the controller 33 controls the fixed electromagnet 13 to start, the fixed electromagnet 13 is fixed on the side wall of the driving frame 2 and energized to generate magnetism, the fixed electromagnet 13 and the driving magnet 14 on the side wall of one end of the impurity removal platform 1 are set with the same pole, and the fixed electromagnet 13 and the driving magnet 14 on the other end of the impurity removal platform 1 are set with different poles, the fixed electromagnet 13 attracts the driving magnet 14 on one end of the impurity removal platform 1 by magnetic force, and the fixed electromagnet 13 pushes the driving magnet 14 on the other end of the impurity removal platform 1 by repulsion, the assembly plate 6 drives the screening mesh plate 8 to rotate around the driving shaft 3 and tilt to one end, the assembly plate 6 drives the induction block 15 on the side wall of one end to reach a position opposite to the proximity switch 16, the controller 33 controls the proximity switch 16 to start, and after the proximity switch 16 senses the induction block 15, the controller 33 controls the current direction converter 17 changes the direction of the current flowing into the fixed electromagnet 13, and the magnetic pole of the fixed electromagnet 13 changes. At this time, the end of the fixed electromagnet 13 and the driving magnet 14 that repel each other changes to opposite poles attracting each other, and the end of the fixed electromagnet 13 and the driving magnet 14 that attracts each other changes to the same poles repelling each other, so that the assembly plate 6 drives the screening mesh plate 8 to rotate and tilt in the opposite direction around the driving shaft 3, and the screening mesh plate 8 drives the quartz sand to shake, and the quartz sand swings inside the screening mesh plate 8, and the impurities in the quartz sand that do not meet the aperture of the screening mesh plate 8 are screened out. As the induction block 15 continues to contact the proximity switch 16 during the shaking, the current direction converter 17 continuously changes the direction of the current entering the fixed electromagnet 13, prompting the assembly plate 6 to drive the screening mesh plate 8 to shake back and forth, and the quartz sand rolls inside the screening mesh plate 8, and the impurities in the quartz sand continuously flow out from the screening holes of the screening mesh plate 8;

[0041] The quartz sand inside the screening mesh plate 8 is prone to generate dust during the screening process. The controller 33 controls the atomizing motor 22 to start. The atomizing motor 22 extracts water from the atomizing tube 21 and the water storage cylinder 20 through the extraction end. The water is atomized by the atomizing motor 22 and then sprayed to the quartz sand inside the screening mesh plate 8 through the atomizing nozzle 23. Then, under the action of the water mist, the surface of the quartz sand can be wetted, thereby preventing the quartz sand from generating more dust during the screening process.

[0042] Manually rotate the arc nut 27, the arc nut 27 drives the arc rod 28 to slide along the inside of the limit frame 25 and penetrate the force-enhancing plate 32, the arc rod 28 penetrates the inside of the force-enhancing plate 32, and then can fix the elastic force of the force-enhancing spring 31, and the shaking range of the screening mesh plate 8 is limited by the arc rod 28, and the screening mesh plate 8 drives the limit block 29 to contact the arc rod 28 and the force-enhancing plate 32 when rotating and tilting, so as to limit the shaking range of the screening mesh plate 8;

[0043] When the sieve plate 8 is in a state of being stretched, the sieve plate 8 is moved back and forth, and ...

[0044] 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, 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, method, article or device.

[0045] The above is a description of the present solution and its implementation methods, which is not restrictive. The drawings show only one implementation method of the present solution, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creative design without departing from the creative purpose of the present solution, they should all fall within the protection scope of the present solution.

Claims

1. A screening device for high-purity quartz sand production, comprising a cleaning table, a driving frame and a driving shaft, characterized in that: It also includes a shaking type aperture filtering mechanism and a throwing force type position limiting speed-up mechanism, the driving frame is symmetrically arranged on both sides of the impurity removal platform, the shaking type aperture filtering mechanism is arranged on the driving shaft, the throwing force type position limiting speed-up mechanism is arranged at one end of the impurity removal platform away from the shaking type aperture filtering mechanism, the shaking type aperture filtering mechanism includes a screening mechanism and a driving mechanism, the screening mechanism is arranged on the outside of the driving shaft, the driving mechanism is arranged on the side wall of the driving frame, the throwing force type position limiting speed-up mechanism includes a drag reduction mechanism, a position limiting mechanism and a force increasing mechanism, the drag reduction mechanism is arranged at one end of the impurity removal platform away from the shaking type aperture filtering mechanism, the position limiting mechanism is arranged on the drag reduction mechanism, and the force increasing mechanism is arranged at one end of the position limiting mechanism away from the drag reduction mechanism; The screening mechanism comprises a screening mesh plate; The limiting mechanism includes a limiting frame, a limiting groove, an arc nut, an arc rod and a limiting block, multiple groups of the limiting frames are arranged on the outside of the driving shaft, the limiting groove is arranged on the side wall of the limiting frame, and the limiting groove is arranged through; The arc-shaped nuts are symmetrically arranged at both ends of the limiting groove, the arc-shaped nuts are rotatably arranged on the inner wall of the limiting groove, the arc-shaped rod is arranged inside the arc-shaped nut, the arc-shaped rod is threadedly connected with the arc-shaped nut, and one end of the arc-shaped rod away from the arc-shaped nut is slidably arranged inside the limiting frame, and multiple groups of the limiting blocks are arranged on the upper walls at both ends of the screening mesh plate; The force-enhancing mechanism comprises a force-enhancing spring and a force-enhancing plate. The force-enhancing spring is symmetrically arranged on both sides of the limiting frame, and the force-enhancing plate is arranged on a side of the force-enhancing spring away from the limiting frame.

2. A screening device for producing high-purity quartz sand according to claim 1, characterized in that: The screening mechanism also includes an assembly plate, a groove, a locking strip plate, a rotating block and a clamping spring. The assembly plate is symmetrically arranged at both ends of the driving shaft, and the assembly plate is slidably arranged on the outside of the driving shaft. The groove is arranged on the side of the assembly plate away from the impurity removal table, and the groove is open at one end.

3. A screening device for producing high-purity quartz sand according to claim 2, characterized in that: The screening mesh plate is arranged between the assembly plates, the locking strips are symmetrically arranged on both sides of the screening mesh plate, the end of the locking strip away from the screening mesh plate is arranged inside the groove, the rotating block is rotatably arranged on the inner wall of the impurity removal table outside the driving shaft, and the clamping spring is arranged between the rotating block outside the driving shaft and the side wall of the assembly plate.

4. A screening device for producing high-purity quartz sand according to claim 3, characterized in that: The driving mechanism includes a fixed electromagnet, a driving magnet, an induction block, a proximity switch and a current direction converter. The fixed electromagnet is arranged on a side of the driving frame close to the assembly plate, and the driving magnet is symmetrically arranged on an end of the assembly plate close to the fixed electromagnet. The driving magnet and the fixed electromagnet are staggered.

5. A screening device for producing high-purity quartz sand according to claim 4, characterized in that: The induction block is symmetrically arranged on the side wall of the assembly plate below the driving magnet, the proximity switch penetrates the side wall of the impurity removal platform below the fixed electromagnet, the induction block and the proximity switch are staggered, and the current direction converter is arranged on the side of the driving frame away from the impurity removal platform.

6. A screening device for producing high-purity quartz sand according to claim 5, characterized in that: The drag reduction mechanism comprises a water storage cylinder, an atomizing pipe, an atomizing motor and an atomizing nozzle, and the water storage cylinder is symmetrically arranged on the top side wall of the impurity removal platform.

7. A screening device for producing high-purity quartz sand according to claim 6, characterized in that: The atomizing pipe passes through the impurity removal platform and is connected to the water storage cylinder. The atomizing motor has symmetrical color numbers and two ends of the atomizing pipe. The atomizing nozzle is arranged at the atomizing end of the atomizing motor.

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