A multi-stage quartz sand screening device

Abstract

This invention relates to the field of screening technology and discloses a multi-stage screening device for quartz sand. The device includes a rotatably arranged multi-stage screening cylinder, which is inclined and comprises a screening cylinder and a drive disc. Multiple screening cylinders are arranged along the axial direction of the multi-stage screening cylinder, and adjacent screening cylinders are connected by the drive disc. The sidewalls of the screening cylinders are uniformly provided with a plurality of screen holes, the diameter of which gradually increases from the high end to the low end of the multi-stage screening cylinder. The drive disc includes a main support ring, a fixed semi-circular disc, and a movable semi-circular disc. The screening cylinders are coaxially connected to the main support ring. The fixed semi-circular disc is coaxially fixed to the inner wall of the main support ring, and the movable semi-circular disc is rotatably arranged on the inner wall of the main support ring. The fixed and movable semi-circular discs are staggered along the axial direction of the main support ring. Multi-stage screening of quartz sand is completed in a single screening operation, avoiding multiple transfers of quartz sand for screening, improving screening efficiency, and reducing equipment investment costs.

Description

Technical Field

[0001] This invention relates to the field of screening technology, specifically to a multi-stage screening device for quartz sand. Background Technology

[0002] Quartz crucibles have advantages such as high purity, strong temperature resistance, large size and high precision, good heat preservation, energy saving and stable quality, and their application is becoming more and more widespread. Quartz crucibles are made from quartz sand. If the particle size of the quartz sand varies significantly, the melting process will be uneven, affecting the crucible's quality. Therefore, quartz sand needs to be sieved during crucible production to obtain quartz sand of different particle sizes. The melting temperature of the quartz sand during crucible production can be rationally controlled based on the particle size to improve the crucible's quality. Currently, sieving machines struggle to achieve multi-stage sieving, i.e., progressively sieving quartz sand to obtain different particle sizes. Multi-stage sieving of quartz sand currently requires multiple sieves with different mesh sizes. Quartz sand is sequentially fed into these sieves to separate the different particle sizes. This sieving process involves a long transport path for the quartz sand, wasting considerable time and reducing sieving efficiency. Furthermore, sieving the same batch of quartz sand requires multiple sieves operating simultaneously, resulting in high equipment costs and significant space requirements. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-stage quartz sand screening device to solve the shortcomings of the prior art.

[0004] The objective of this invention is achieved through the following technical solution: a multi-stage quartz sand screening device, comprising a multi-stage screening cylinder and a collection box, wherein the multi-stage screening cylinder is inclined and rotatably mounted on the top of the collection box, the multi-stage screening cylinder includes a screening cylinder and a drive disc, multiple screening cylinders are arranged along the axial direction of the multi-stage screening cylinder, adjacent two screening cylinders are connected by the drive disc, and a plurality of screen holes are uniformly provided on the side wall of the screening cylinder, the diameter of the screen holes of the plurality of screening cylinders gradually increases from the high end to the low end of the multi-stage screening cylinder;

[0005] The drive disc includes a main support ring, a fixed semi-circular disc, and a movable semi-circular disc. The screening cylinder is coaxially connected to the main support ring. The fixed semi-circular disc is coaxially fixed on the inner wall of the main support ring. The movable semi-circular disc is rotatably disposed on the inner wall of the main support ring and is coaxial with the main support ring. The fixed semi-circular disc and the movable semi-circular disc are staggered along the axial direction of the main support ring.

[0006] The top of the collection box has multiple collection chambers along the axial direction of the multi-stage screening cylinder, and each collection chamber corresponds to one of the screening cylinders.

[0007] Furthermore, an external gear ring is coaxially fixed on the movable semi-circular disk, and an annular drive groove is formed on the inner wall of the main support ring. The external gear ring is rotatably adapted to the annular drive groove, and the side wall of the external gear ring contacts the side wall of the annular drive groove. A drive box is fixed on the outer wall of the main support ring, and a main shaft is rotatably arranged inside the drive box. A main gear is mounted on the main shaft. A drive window is formed on the outer wall of the main support ring, and the drive window communicates with the annular drive groove. The main gear passes through the drive window and meshes with the external gear ring. A motor is arranged on the drive box, and the output shaft of the motor is connected to the main shaft.

[0008] Furthermore, a first positioning block and a second positioning block are fixed to the inner wall of the annular drive groove, and a limiting tooth is fixed on the outer gear ring. The limiting tooth is located between the first positioning block and the second positioning block, and the tooth height of the limiting tooth is greater than the tooth height of the outer gear ring. When the limiting tooth contacts the first positioning block, the movable semi-disc and the fixed semi-disc coincide along the axial direction of the multi-stage screening cylinder. When the limiting tooth contacts the second positioning block, the movable semi-disc is located below the fixed semi-disc.

[0009] Furthermore, pressure sensors are embedded in the end face of the first positioning block near the limiting tooth and the end face of the second positioning block near the limiting tooth.

[0010] Furthermore, a limiting component is fixed to the outer wall of the main support ring. The limiting component includes a limiting box and a tooth. The limiting box is fixed to the main support ring and has an installation cavity inside. An insertion hole is opened on the side wall of the main support ring. A sliding groove is opened at one end of the limiting box near the main support ring. The two ends of the sliding groove are respectively connected to the installation cavity and the insertion hole. The tooth is slidably disposed in the sliding groove. One end of the tooth extends into the installation cavity and is fixed with a limiting plate. An electromagnet is disposed in the installation cavity. A permanent magnet is fixed at one end of the limiting plate near the electromagnet. The electromagnet generates magnetic poles with magnetic properties opposite to those of the permanent magnet. A return spring is connected to the limiting plate. The end of the return spring away from the limiting plate is connected to the limiting box. When the return spring is de-energized and the electromagnet is de-energized, the tooth is inserted into the tooth groove of the outer gear ring.

[0011] Furthermore, a guide ring is fixedly sleeved on the movable semi-circular disk, and an annular guide groove is formed on the inner wall of the main support ring. The cross-sectional shape of the annular guide groove and the cross-sectional shape of the guide ring are both T-shaped. The guide ring is rotatably adapted to the annular guide groove, and the side wall of the guide ring contacts the side wall of the annular guide groove.

[0012] Furthermore, the main support ring adopts a split structure, comprising an upper support ring and a lower support ring, wherein the upper support ring is connected to the lower support ring by a bolt assembly.

[0013] Furthermore, the screening cylinder includes an annular cylinder and a screening assembly. Multiple screening windows are evenly distributed along the circumference of the sidewall of the annular cylinder. The screening assembly is disposed within each screening window. The screening assembly includes a hollow arc-shaped frame and a screening mesh. The screening mesh is welded to the inner wall of the hollow arc-shaped frame. A supporting ring is fixed to the inner wall of each screening window. The hollow arc-shaped frame is mounted on the supporting ring. Multiple locking steel balls are arranged along the axial direction of the screening cylinder on the sidewall of each screening window. Locking grooves are formed on the sidewall of the hollow arc-shaped frame corresponding to the positions of the locking steel balls. The locking steel balls are partially fitted into the locking grooves.

[0014] Furthermore, a locking groove is provided between two adjacent screening windows, and a locking slide bar is slidably disposed within the locking groove. The locking slide bar moves axially along the screening cylinder. A steel ball mounting groove is provided at the position where the locking steel ball is located in the screening window. The two ends of the steel ball mounting groove are respectively connected to the screening window and the locking groove. The locking steel ball is movably disposed within the steel ball mounting groove. The bottom wall of the steel ball mounting groove is a slope, with the lower end of the slope close to the locking groove. The top wall of the steel ball mounting groove is a two-stage stepped structure. The small steps of the stepped structure are positioned near the screening window. The height of the small steps is less than the diameter of the locking steel ball. The locking slide has a frustum-shaped hole corresponding to the position of the steel ball mounting groove. The larger diameter end of the frustum-shaped hole is positioned near the steel ball mounting groove. When the locking steel ball contacts the side wall of the locking slide, the locking steel ball partially fits into the locking groove. The locking groove is frustum-shaped, and the larger diameter end is positioned near the steel ball mounting groove. When the locking steel ball partially fits into the frustum-shaped hole, the locking steel ball disengages from the locking groove.

[0015] Furthermore, a bearing seat is fixed to the top of the collection box, the multi-stage screening cylinder is rotatably mounted on the bearing seat, a large gear ring is fitted on the multi-stage screening cylinder, a drive motor is installed on the collection box, and a drive gear is connected to the output shaft of the drive motor, the drive gear meshing with the large gear ring.

[0016] The beneficial effects of this invention are:

[0017] 1. Multi-stage screening of quartz sand is completed in one screening operation, avoiding multiple transfers of quartz sand for screening, improving screening efficiency and reducing equipment investment costs.

[0018] 2. By rotating the movable semi-circular disc, the opening and closing of adjacent screening cylinders are completed, allowing quartz sand to enter different screening cylinders in sequence for screening. This separates the quartz sand into different particle size ranges. The multiple screening cylinders are independent of each other and can perform screening operations simultaneously to screen out quartz sand of different particle size ranges. This results in high screening accuracy of quartz sand, which is beneficial to improving the production quality of subsequent quartz crucibles. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a multi-stage quartz sand screening device according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the multi-stage screening cylinder in a multi-stage quartz sand screening device of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the screening cylinder in a multi-stage quartz sand screening device of the present invention;

[0022] Figure 4 This is a schematic diagram of the movable semi-circular disk in a multi-stage quartz sand screening device of the present invention;

[0023] Figure 5 This is a schematic diagram of the internal structure of the main support ring in a multi-stage quartz sand screening device of the present invention;

[0024] Figure 6 This is a schematic diagram of the annular cylinder in a multi-stage quartz sand screening device of the present invention;

[0025] Figure 7 This is a partial structural diagram of the annular cylinder in a multi-stage quartz sand screening device of the present invention;

[0026] Figure 8 This is a top view of the annular cylinder in a multi-stage quartz sand screening device of the present invention;

[0027] Figure 9 for Figure 8 Sectional view along the BB direction;

[0028] Figure 10 for Figure 9 Enlarged view of point A in the middle;

[0029] In the diagram, 1-multi-stage screening cylinder, 2-collection box, 3-screening cylinder, 4-drive disc, 5-screen hole, 6-main support ring, 7-fixed semi-disc, 8-movable semi-disc, 9-collection chamber, 10-external gear ring, 11-annular drive groove, 12-drive box, 13-main shaft, 14-main gear, 15-drive window, 16-motor, 17-first positioning block, 18-second positioning block, 19-limiting tooth, 20-pressure sensor, 22-limiting box, 23-insertion tooth, 24-installation Cavity, 25-Insertion hole, 26-Slide groove, 27-Limiting plate, 28-Electromagnet, 29-Permanent magnet, 30-Reset spring, 31-Guide ring, 32-Annular guide groove, 33-Annular cylinder, 34-Hollow arc frame, 35-Screening screen, 36-Support ring platform, 37-Locking steel ball, 38-Locking groove, 39-Locking slide groove, 40-Locking slide bar, 41-Steel ball mounting groove, 42-Frustum hole, 43-Bearing seat, 44-Large gear ring, 45-Drive motor, 46-Drive gear. Detailed Implementation

[0030] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0031] Example 1

[0032] like Figures 1 to 10As shown, a multi-stage quartz sand screening device includes a multi-stage screening cylinder 1 and a collection box 2. The multi-stage screening cylinder 1 is inclined, and quartz sand is fed into the cylinder from its high-end opening. The inclined arrangement of the multi-stage screening cylinder 1 causes the quartz sand to move from high to low, allowing it to enter different screening sections for screening, thus achieving multi-stage screening. The multi-stage screening cylinder 1 is rotatably mounted on top of the collection box 2, and a bearing seat 43 is fixed to the top of the collection box 2. A multi-stage screening cylinder 1 is rotatably mounted on a bearing seat 43. A large gear ring 44 is fitted onto the multi-stage screening cylinder 1. A drive motor 45 is mounted on the collection box 2. The output shaft of the drive motor 45 is connected to a drive gear 46, which meshes with the large gear ring 44. The multi-stage screening cylinder 1 includes screening cylinders 3 and drive discs 4. Multiple screening cylinders 3 are arranged along the axial direction of the multi-stage screening cylinder 1. Adjacent screening cylinders 3 are connected by drive discs 4. The sidewalls of the screening cylinders 3 are evenly provided with a number of screen holes 5. Multiple screening... The diameter of the sieve holes in cylinder 3 gradually increases from the high end to the low end of the multi-stage screening cylinder 1. Multiple collection chambers 9 are formed along the axial direction of the multi-stage screening cylinder 1 at the top of the collection box 2. Each collection chamber 9 corresponds to one of the multiple screening cylinders 3. The drive motor 45 drives the multi-stage screening cylinder 1 to rotate through the meshing of the drive gear 46 and the large gear ring 44. The rotation of the multi-stage screening cylinder 1 enhances the movement of the quartz sand, preventing it from accumulating inside the screening cylinder 3, resulting in a better screening effect. Simultaneously, the gravity of the quartz sand further enhances the screening efficiency. Quartz sand moves well from high to low, resulting in a good multi-stage screening effect. This allows the quartz sand to be screened sequentially through different screening cylinders 3 from high to low. The diameter of the screen holes in the multiple screening cylinders 3 gradually increases from the high end to the low end of the multi-stage screening cylinder 1, thereby achieving multi-stage screening. This ensures that quartz sand of different particle size ranges is screened in different collection chambers 9, resulting in finer screening of the quartz sand. This facilitates the selection of appropriate processing temperatures based on the particle size range of the quartz sand, improving the production quality of the quartz crucible.

[0033] Furthermore, such as Figures 1 to 3As shown, the drive disc 4 includes a main support ring 6, a fixed semi-circular disc 7, and a movable semi-circular disc 8. The screening cylinder 3 is coaxially connected to the main support ring 6. The fixed semi-circular disc 7 is coaxially fixed to the inner wall of the main support ring 6. The movable semi-circular disc 8 is rotatably mounted on the inner wall of the main support ring 6 and is coaxial with the main support ring 6. The fixed semi-circular disc 7 and the movable semi-circular disc 8 are staggered along the axial direction of the main support ring 6. By rotating the movable semi-circular disc 8, adjacent screening cylinders 3 can be connected for material transfer, or the opening between adjacent screening cylinders 3 can be closed to prevent quartz sand from entering the next screening cylinder 3. This allows multiple screening cylinders 3 to operate independently, enabling control of the screening time of quartz sand within the screening cylinders 3 according to actual conditions. The screening is more thorough. Specifically, the movable semi-circular disk 8 rotates to below the fixed semi-circular disk 7, forming a complete circular valve that closes the two adjacent screening cylinders 3 of the drive disk 4. This allows the quartz sand to remain in the upper-level screening cylinder 3 for screening. After screening for a certain period, the movable semi-circular disk 8 rotates again, aligning with the fixed semi-circular disk 7, connecting the two adjacent screening cylinders 3. This allows the quartz sand in the upper-level screening cylinder 3 to flow into the lower-level screening cylinder 3 for screening. This allows multiple screening cylinders 3 to communicate with each other for quartz sand transfer, while also enabling each screening cylinder 3 to operate independently. In the actual screening process: Multi-stage screening cylinder 1 The lower end of the multi-stage screening cylinder 1 is connected to a drive disc 4. The upper end of the multi-stage screening cylinder 1 is an open structure. A feed hopper is set at the upper end of the multi-stage screening cylinder 1, and the end of the feed hopper extends into the multi-stage screening cylinder 1, but the feed hopper does not contact the multi-stage screening cylinder 1 to avoid interference. The quartz sand is guided into the uppermost screening cylinder 3 by the feed hopper. At this time, the uppermost screening cylinder 3 and the next-level screening cylinder 3 are in a closed state, so that the quartz sand is screened in the uppermost screening cylinder 3. After screening for a certain period of time, the opening of the next-level screening cylinder 3 is opened, so that the quartz sand in the uppermost screening cylinder 3 enters the next-level screening cylinder 3 for screening. The next-level screening cylinder 3 and the next-next-level screening cylinder 3 are separated by... The opening is closed, allowing the quartz sand that has undergone one screening to be further screened in the next screening cylinder 3. At this time, the feed hopper again introduces the quartz sand into the uppermost screening cylinder 3 for screening, so that multiple screening cylinders 3 can perform screening operations simultaneously and independently, without quartz sand mixing, resulting in better screening effect. Thus, multi-stage screening of quartz sand is carried out by gradually conveying it, and new quartz sand is introduced simultaneously for screening, realizing continuous screening operation. When the quartz sand enters the end screening cylinder 3, after a certain period of screening, the opening of the end drive disc 4 opens, allowing the large-diameter quartz sand that is not screened out to be discharged from the multi-stage screening cylinder 1.

[0034] Example 2

[0035] Because the movable semi-circular disk 8 is rotatably installed inside the main support ring 6, and because the movable semi-circular disk 8 is semi-circular in shape, a gap is easily formed between the movable semi-circular disk 8 and the inner wall of the main support ring 6 during its rotational installation. Quartz sand entering this gap can affect the rotation of the movable semi-circular disk 8. Therefore, based on Embodiment 1, as follows... Figures 1 to 5 As shown, an external gear ring 10 is coaxially fixed on the movable semi-circular disk 8. An annular drive groove 11 is formed on the inner wall of the main support ring 6. The external gear ring 10 is rotatably fitted into the annular drive groove 11, and the side wall of the external gear ring 10 contacts the side wall of the annular drive groove 11. A drive box 12 is fixed on the outer wall of the main support ring 6. A main shaft 13 is rotatably arranged inside the drive box 12. A main gear 14 is mounted on the main shaft 13. A drive window 15 is formed on the outer wall of the main support ring 6. The drive window 15 communicates with the annular drive groove 11. The main gear 14 passes through the drive window 15 and meshes with the external gear ring 10. A motor 16 is arranged on the drive box 12. The output shaft of the motor 16 is connected to the main shaft 13. The motor 16 drives the main shaft 13 to rotate. The main shaft 13 drives the movable semi-disc 8 to rotate through the meshing of the main gear 14 and the outer gear ring 10. This makes the rotation axis of the movable semi-disc 8 coaxial with the axis of the screening cylinder 3, ensuring that the movable semi-disc 8 can rotate stably on the support ring 6. At the same time, the outer gear ring 10 is a complete circle. When the movable semi-disc 8 is rotatably installed in the annular drive groove 11, the outer gear ring 10 can fit into the annular drive groove 11. Since the side wall of the outer gear ring 10 contacts the side wall of the annular drive groove 11, the entire annular drive groove 11 is well sealed, preventing quartz sand from entering the annular drive groove 11 and affecting the rotation of the movable semi-disc 8.

[0036] Furthermore, such as Figures 1 to 5 As shown, due to the rotating installation of the external gear ring 10, it cannot be fully fitted into the annular drive groove 11. A gap is needed between the external gear ring 10 and the inner wall of the annular drive groove 11 to allow the external gear ring 10 to rotate. This results in unstable installation of the movable semi-circular disk 8, causing it to wobble during rotation. Therefore, a guide ring 31 is fixedly fitted onto the movable semi-circular disk 8, and an annular guide groove 32 is formed on the inner wall of the main support ring 6. The cross-sectional shape of both the annular guide groove 32 and the guide ring 31 is T-shaped. The guide ring 31 rotates... The guide ring 31 is fitted into the annular guide groove 32, and the side wall of the guide ring 31 contacts the side wall of the annular guide groove 32. The fit between the guide ring 31 and the annular guide groove 32 guides the rotation path of the movable semi-disc 8, making the rotation of the movable semi-disc 8 more stable. In addition, the guide ring 31 is a complete ring and fits well into the annular guide groove 32. This ensures that the movable semi-disc 8 can rotate normally, while also eliminating the gap between the guide ring 31 and the annular guide groove 32, preventing quartz sand from entering the annular guide groove 32 and affecting the rotation of the movable semi-disc 8.

[0037] Example 3

[0038] The continuity between two adjacent screening cylinders 3 does not require high precision, but closing the two adjacent screening cylinders 3 requires precise rotation of the movable semi-circular disk 8 so that it cooperates with the fixed semi-circular disk 7 to form a complete circular disk. Therefore, it is necessary to position the movable semi-circular disk 8. For this purpose, based on Embodiment 2, as follows... Figure 1 , Figure 2 and Figure 5 As shown, a first positioning block 17 and a second positioning block 18 are fixed to the inner wall of the annular drive groove 11. A limiting tooth 19 is fixed on the outer gear ring 10. The limiting tooth 19 is located between the first positioning block 17 and the second positioning block 18. The tooth height of the limiting tooth 19 is greater than the tooth height of the outer gear ring 10. When the limiting tooth 19 contacts the first positioning block 17, the movable semi-circular disk 8 and the fixed semi-circular disk 7 coincide along the axial direction of the multi-stage screening cylinder 1. When the limiting tooth 19 contacts the second positioning block 18, the movable semi-circular disk 8 is located below the fixed semi-circular disk 7. The end face of the first positioning block 17 near the limiting tooth 19 and the second positioning tooth 18 are also fixed. Pressure sensors 20 are embedded in the end faces of the positioning blocks 17 near the limiting teeth 19. The first positioning block 17 and the second positioning block 18 respectively position the connection and closure between two adjacent screening cylinders 3. Specifically, when the movable semi-circular disk 8 rotates, it will drive the limiting teeth 19 to rotate. When the limiting teeth 19 contact the first positioning block 17, the first positioning block 17 will block the movable semi-circular disk 8 from rotating further. At this time, the motor 16 stops, and the movable semi-circular disk 8 coincides with the fixed semi-circular disk 7, so that the two adjacent screening cylinders 3 are connected for the transfer of quartz sand. After the transfer is completed, The motor 16 rotates in the reverse direction, causing the movable semi-disc 8 to rotate in reverse. When the limiting tooth 19 contacts the second positioning block 18, the second positioning block 18 blocks the movable semi-disc 8 from rotating further. At this time, the motor 16 stops, and the movable semi-disc 8 and the fixed semi-disc 7 form a complete disc seal between the two adjacent screening cylinders 3, thus achieving precise rotation of the movable semi-disc 8. The pressure sensor 20 determines whether the limiting tooth 19 contacts the first positioning block 17 or the second positioning block 18, thereby accurately stopping the motor 16. A preset pressure is set on the pressure sensor 20. When the positioning tooth 19 contacts the first positioning block 17, it will exert pressure on the pressure sensor 20. When the pressure of the pressure sensor 20 exceeds the preset pressure, it will prevent the movable semi-disc 8 from rotating into place. At this time, the motor 16 will stop. Conversely, when the pressure exerted by the limiting tooth 19 on the second positioning block 18 reaches the set value, the motor 16 will stop. This allows for precise control of the motor 16's disconnection, achieving precise deflection of the movable semi-disc 8. It also protects the motor 16, preventing the rotational freedom of the movable semi-disc 8 from being restricted and the motor 16 from being damaged due to continuous operation.

[0039] Example 4

[0040] Because the multi-stage screening cylinder 1 rotates continuously for screening, the movable semi-circular disk 8 is affected by centrifugal force, which can cause it to automatically deflect. This can lead to abnormal connection or closure between adjacent screening cylinders 3. Therefore, based on Embodiment 3, as follows... Figure 5 As shown, a limiting component is fixed to the outer wall of the main support ring 6. The limiting component includes a limiting box 22 and a tooth 23. The limiting box 22 is fixed to the main support ring 6 and has an installation cavity 24 inside. An insertion hole 25 is opened on the side wall of the main support ring 6. A sliding groove 26 is opened at one end of the limiting box 22 near the main support ring 6. The two ends of the sliding groove 26 are respectively connected to the installation cavity 24 and the insertion hole 25. The tooth 23 is slidably disposed in the sliding groove 26, and one end of the tooth 23 extends to the installation cavity 24. A limiting plate 27 is fixed inside the mounting cavity 24. An electromagnet 28 is installed inside the mounting cavity 24. A permanent magnet 29 is fixed to the end of the limiting plate 27 near the electromagnet 28. The electromagnet 28 generates magnetic poles with opposite magnetic properties to the permanent magnet 29. A return spring 30 is connected to the limiting plate 27. The end of the return spring 30 away from the limiting plate 27 is connected to the limiting box 22. When the return spring 30 is de-energized and the electromagnet 28 is de-energized, the insert 23 is inserted into the tooth groove of the outer tooth ring 10. When the limiting tooth 19 contacts the first positioning block 17 or the second positioning block 18, the pressure sensor 20 is activated, de-energizing the electromagnet 28 and the motor 16. At this time, the insert tooth 23 is inserted into the tooth groove of the outer tooth ring 10 under the reaction force of the return spring 30, thereby locking the position of the movable semi-disc 8. When it is necessary to rotate the movable semi-disc 8 to change its position, the electromagnet 28 is energized, attracting the permanent magnet 29, causing the insert tooth 23 to compress the return spring 30 and move into the mounting cavity 24, causing the insert tooth 23 to disengage from the tooth groove of the outer tooth ring 10, thereby unlocking the movable semi-disc 8. Then, the motor 16 is activated, which can smoothly drive the movable semi-disc 8 to rotate for position switching. When it moves to the designated position, the motor 16 and the electromagnet 28 are de-energized, causing the insert tooth 23 to insert into the tooth groove of the outer tooth ring 10, thereby locking the position of the movable semi-disc 8, so that the movable semi-disc 8 can remain stable during the rotation of the multi-stage screening cylinder 1.

[0041] Example 5

[0042] Based on Embodiment 4, the main support ring 6 adopts a split structure, which includes an upper support ring and a lower support ring. The upper support ring is connected to the lower support ring by a bolt assembly. The main support ring 6 is set as a split structure, which makes it convenient to install the movable semi-circular disk 8 on the main support ring 6.

[0043] Example 6

[0044] Based on Example 5, such as Figures 6 to 10As shown, the screening cylinder 3 includes an annular cylinder 33 and a screening assembly. Multiple screening windows are evenly distributed along the circumference of the sidewall of the annular cylinder 33. A screening assembly is installed within each screening window. The screening assembly includes a hollow arc-shaped frame 34 and a screening mesh 35. The screening mesh 35 is welded to the inner wall of the hollow arc-shaped frame 34. A support ring platform 36 is fixed to the inner wall of each screening window. The hollow arc-shaped frame 34 is mounted on the support ring platform 36. Multiple locking steel balls 37 are arranged along the axial direction of the screening cylinder 3 on the sidewall of the screening window. Locking grooves 38 are formed on the sidewall of the hollow arc-shaped frame 34 corresponding to the positions of the locking steel balls 37. The locking steel balls 37 are partially fitted into the locking grooves 38. The screening assembly is detachably installed in the annular cylinder. On body 33, when the screening screen 35 is damaged or clogged, the screening component can be easily removed for replacement or cleaning. Specifically, the hollow arc frame 34 is placed on the support ring platform 36, which supports and positions the hollow arc frame 34. At this time, the locking groove 38 is located at the moving position of the locking steel ball 37. Then, the locking steel ball 37 is moved so that it partially fits into the locking groove 38. At this time, part of the locking steel ball 37 is in the annular cylinder 33 and the other part is in the hollow arc frame 34, thus quickly installing the hollow arc frame 34 in the annular cylinder 33. The locking and removal of the hollow arc frame 34 can be completed by moving the locking steel ball 37. The operation is simple and quick.

[0045] Furthermore, a locking groove 39 is provided between two adjacent screening windows, and a locking slide bar 40 is slidably disposed within the locking groove 39. The locking slide bar 40 moves along the axial direction of the screening cylinder 3. A steel ball mounting groove 41 is provided at the position where the locking steel ball 37 is located in the screening window. The two ends of the steel ball mounting groove 41 are respectively connected to the screening window and the locking groove 39. The locking steel ball 37 is movably disposed within the steel ball mounting groove 41. The bottom wall of the steel ball mounting groove 41 is a slope, with the lower end of the slope close to the locking groove 39. The top wall of the steel ball mounting groove 41 is a two-stage step, with the small step of the two-stage step located close to the screening window. The height of the small step is less than the diameter of the locking steel ball 37, allowing the locking steel ball 37 to pass through the small step end of the steel ball mounting groove 41, while the steel ball is mounted... The other end of the mounting groove 41 is restricted by a locking slide bar 40, preventing the locking steel ball 37 from disengaging from the steel ball mounting groove 41. The locking slide bar 40 has a frustum-shaped hole 42 corresponding to the position of the steel ball mounting groove 41. The larger diameter end of the frustum-shaped hole 42 is positioned close to the steel ball mounting groove 41. When the locking steel ball 37 contacts the side wall of the locking slide bar 40, the locking steel ball 37 partially fits into the locking groove 38. The locking groove 38 is frustum-shaped, with its larger diameter end positioned close to the steel ball mounting groove 41. When the locking steel ball 37 partially fits into the frustum-shaped hole 42, the locking steel ball 37 disengages from the locking groove 38. Both sides of the locking slide bar 40 have frustum-shaped holes 42, allowing the locking slide bar 40 to simultaneously lock the screening components on both sides. Specifically, when the locking slide bar 40 slides to the locking groove 38... When the bottom of the fixed slide groove 39 is reached, the frustum hole 42 corresponds to the ball bearing mounting groove 41. Under the action of the inclined surface at the bottom of the ball bearing mounting groove 41, the locking ball 37 moves closer to the frustum hole 42, so that part of the locking ball 37 is located in the frustum hole 42 and the other part is located in the ball bearing mounting groove 41. Then, the hollow arc frame 34 is placed on the support ring platform 36. At this time, the locking groove 38 corresponds to the ball bearing mounting groove 41. Then, the locking slider 40 is slid, so that the locking slider 40 moves to the top of the locking slide groove 39. During the movement, due to the frustum shape of the frustum hole 42, it cannot lock the locking ball 37, thus pushing the locking ball 37 to move, so that part of the locking ball 37 is located in the ball bearing mounting groove 41 and the other part is located in the locking groove 38. Inside, at this time, the side wall of the locking slide bar 40 contacts the locking steel ball 37 to restrict the movement of the locking steel ball 37. Finally, the locking slide bar 40 is connected to the annular cylinder 33 by screws, thereby locking the position of the locking steel ball 37 and completing the installation of the screening component. By locking the locking slide bar 40, the screening components on both sides of the locking slide bar 40 can be locked. When disassembling, remove the screws on the locking slide bar 40, move the locking slide bar 40 to the bottom of the locking groove 39, so that the frustum hole 42 corresponds to the steel ball mounting groove 41. Under the action of the inclined surface at the bottom of the steel ball mounting groove 41, the locking steel ball 37 is disengaged from the locking groove 38. Then, the hollow arc frame 34 can be directly removed to complete the disassembly of the screening component. Compared with the pure screw method, the disassembly and assembly are simple and quick.

Claims

1. A multi-stage quartz sand screening apparatus, characterized by, The system includes a multi-stage screening cylinder (1) and a collection box (2). The multi-stage screening cylinder (1) is inclined and rotatably mounted on the top of the collection box (2). The multi-stage screening cylinder (1) includes a screening cylinder (3) and a drive disc (4). Multiple screening cylinders (3) are arranged along the axial direction of the multi-stage screening cylinder (1). Two adjacent screening cylinders (3) are connected by the drive disc (4). The side wall of the screening cylinder (3) is uniformly provided with a number of screen holes (5). The diameter of the screen holes of the multiple screening cylinders (3) gradually increases from the high end to the low end of the multi-stage screening cylinder (1). The drive disc (4) includes a main support ring (6), a fixed semi-circular disc (7), and a movable semi-circular disc (8). The screening cylinder (3) is coaxially connected to the main support ring (6). The fixed semi-circular disc (7) is coaxially fixed on the inner wall of the main support ring (6). The movable semi-circular disc (8) is rotatably disposed on the inner wall of the main support ring (6). The movable semi-circular disc (8) is coaxial with the main support ring (6). The fixed semi-circular disc (7) and the movable semi-circular disc (8) are staggered along the axial direction of the main support ring (6). The top of the collection box (2) is provided with multiple collection chambers (9) along the axial direction of the multi-stage screening cylinder (1), and the multiple collection chambers (9) correspond one-to-one with the multiple screening cylinders (3); An external gear ring (10) is coaxially fixed on the movable semi-circular disk (8). An annular drive groove (11) is provided on the inner wall of the main support ring (6). The external gear ring (10) is rotatably adapted to the annular drive groove (11). The side wall of the external gear ring (10) contacts the side wall of the annular drive groove (11). A drive box (12) is fixed on the outer wall of the main support ring (6). A main shaft (13) is rotatably arranged inside the drive box (12). A main gear (14) is fitted on the main shaft (13). A drive window (15) is provided on the outer wall of the main support ring (6). The drive window (15) communicates with the annular drive groove (11). The main gear (14) passes through the drive window (15) and meshes with the external gear ring (10). A motor (16) is provided on the drive box (12). The output shaft of the motor (16) is connected to the main shaft (13). The inner wall of the annular drive groove (11) is fixed with a first positioning block (17) and a second positioning block (18). A limiting tooth (19) is fixed on the outer gear ring (10). The limiting tooth (19) is located between the first positioning block (17) and the second positioning block (18). The tooth height of the limiting tooth (19) is greater than the tooth height of the outer gear ring (10). When the limiting tooth (19) contacts the first positioning block (17), the movable semi-circular disk (8) and the fixed semi-circular disk (7) coincide along the axial direction of the multi-stage screening cylinder (1). When the limiting tooth (19) contacts the second positioning block (18), the movable semi-circular disk (8) is located below the fixed semi-circular disk (7). Pressure sensors (20) are embedded in the end face of the first positioning block (17) near the limiting tooth (19) and the end face of the second positioning block (18) near the limiting tooth (19). The outer wall of the main support ring (6) is fixed with a limiting component, which includes a limiting box (22) and a tooth (23). The limiting box (22) is fixed on the main support ring (6). The limiting box (22) has an installation cavity (24) inside. The side wall of the main support ring (6) has an insertion hole (25). The limiting box (22) has a sliding groove (26) at one end near the main support ring (6). The two ends of the sliding groove (26) are respectively connected to the installation cavity (24) and the insertion hole (25). The tooth (23) is slidably disposed in the sliding groove (26). One end of the tooth (23) extends to the... A limiting plate (27) is fixed inside the mounting cavity (24). An electromagnet (28) is provided inside the mounting cavity (24). A permanent magnet (29) is fixed at one end of the limiting plate (27) near the electromagnet (28). The electromagnet (28) generates magnetic poles that are opposite to the magnetic properties of the permanent magnet (29). A reset spring (30) is connected to the limiting plate (27). The end of the reset spring (30) away from the limiting plate (27) is connected to the limiting box (22). When the reset spring (30) is de-energized and the electromagnet (28) is de-energized, the insert (23) is inserted into the tooth groove of the outer tooth ring (10).

2. A multi-stage quartz sand screening device according to claim 1, characterized in that, A guide ring (31) is fixedly sleeved on the movable semi-circular disk (8). An annular guide groove (32) is opened on the inner wall of the main support ring (6). The cross-sectional shape of the annular guide groove (32) and the cross-sectional shape of the guide ring (31) are both T-shaped. The guide ring (31) is rotatably adapted to the annular guide groove (32). The side wall of the guide ring (31) contacts the side wall of the annular guide groove (32).

3. A multi-stage quartz sand screening device according to claim 1, characterized in that, The main support ring (6) adopts a split structure, and the main support ring (6) includes an upper support ring and a lower support ring. The upper support ring is connected to the lower support ring by a bolt assembly.

4. The quartz sand multi-stage screening apparatus according to claim 1, characterized in that, The screening cylinder (3) includes an annular cylinder (33) and a screening assembly. The side wall of the annular cylinder (33) is evenly provided with multiple screening windows along its circumference. The screening assembly is provided in the screening window. The screening assembly includes a hollow arc frame (34) and a screening mesh (35). The screening mesh (35) is welded to the inner wall of the hollow arc frame (34). A support ring platform (36) is fixed to the inner wall of the screening window. The hollow arc frame (34) is installed on the support ring platform (36). Multiple locking steel balls (37) are provided on the side wall of the screening window along the axial direction of the screening cylinder (3). A locking groove (38) is provided on the side wall of the hollow arc frame (34) corresponding to the position of the locking steel ball (37). The locking steel ball (37) is partially adapted to the locking groove (38).

5. A multi-stage quartz sand screening apparatus as claimed in claim 4, wherein, A locking groove (39) is provided between two adjacent screening windows. A locking slide bar (40) is slidably disposed in the locking groove (39). The locking slide bar (40) moves along the axial direction of the screening cylinder (3). A ball bearing mounting groove (41) is provided at the position where the locking ball (37) is located in the screening window. The two ends of the ball bearing mounting groove (41) are respectively connected to the screening window and the locking groove (39). The locking ball (37) is movably disposed in the ball bearing mounting groove (41). The bottom wall of the ball bearing mounting groove (41) is a slope, and the lower end of the slope is close to the locking groove (39). The top wall of the ball bearing mounting groove (41) is a two-stage step. The small step is positioned close to the screening window. The height of the small step is less than the diameter of the locking ball (37). The locking slide (40) has a frustum hole (42) corresponding to the position of the ball mounting groove (41). The large diameter end of the frustum hole (42) is positioned close to the ball mounting groove (41). When the locking ball (37) contacts the side wall of the locking slide (40), the locking ball (37) is partially fitted into the locking groove (38). The locking groove (38) is frustum shaped, and the large diameter end is positioned close to the ball mounting groove (41). When the locking ball (37) is partially fitted into the frustum hole (42), the locking ball (37) disengages from the locking groove (38).

6. A multi-stage quartz sand screening apparatus as claimed in claim 1, wherein, The top of the collection box (2) is fixed with a bearing seat (43), the multi-stage screening cylinder (1) is rotatably mounted on the bearing seat (43), a large gear ring (44) is fitted on the multi-stage screening cylinder (1), a drive motor (45) is installed on the collection box (2), the output shaft of the drive motor (45) is connected to a drive gear (46), and the drive gear (46) meshes with the large gear ring (44).

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