A sand mill screen that integrates multiple screens, is less prone to clogging, and is easy to disassemble.

Abstract

This invention discloses a multi-set integrated screen for a sand mill that is less prone to clogging and easy to disassemble, relating to the grinding field. It includes a mounting plate and multiple screen bodies mounted on the mounting plate. The key feature is that the mounting plate is equipped with a synchronous locking mechanism. This invention provides a multi-set integrated screen for a sand mill that is less prone to clogging and easy to disassemble. By providing a synchronous locking mechanism on the mounting plate, multiple screen bodies are simultaneously locked during installation. When multiple screen bodies need to be removed from the mounting plate, the synchronous locking mechanism unlocks them simultaneously. This allows for the synchronous locking and unlocking of multiple screen bodies, facilitating the disassembly and installation of the screen bodies.

Description

Technical Field

[0001] This invention relates to the field of grinding, specifically to a sand mill screen that integrates multiple screens, is not prone to clogging, and is easy to disassemble. Background Technology

[0002] As is generally known, a dry sand mill is a device that efficiently grinds materials using grinding media (usually metal or ceramic sand balls, steel balls, etc.) in a waterless, enclosed grinding chamber. Compared to wet sand mills, dry sand mills do not require the addition of liquid media during processing and output dry materials.

[0003] For example, the Chinese patent document with authorization announcement number CN223393575U, announcement date of 2025-09-30, and titled "A Screen for Dry Grinding," includes a screen body with multiple longitudinally arranged elongated filter holes. These elongated filter holes include narrow-slit elongated filter holes and wide-slit elongated filter holes that are sequentially connected from the front to the back of the screen body. The slit width of the narrow-slit elongated filter holes is smaller than that of the wide-slit elongated filter holes. The elongated filter holes allow materials meeting the particle size requirements to be screened out. Furthermore, the longitudinal arrangement of the elongated filter holes makes it easier to remove material from the elongated filter holes during the actual grinding process under the action of the material / grinding media, preventing material accumulation and clogging. This facilitates the timely screening of materials meeting the particle size requirements and improves grinding efficiency. When the material is discharged, it is discharged sequentially along the narrow-slit long strip filter holes and the wide-slit long strip filter holes. The material is screened by the narrow-slit long strip filter holes and then discharged into the wide-slit long strip filter holes, which is more conducive to avoiding the accumulation of material and clogging of the entire long strip filter holes.

[0004] The drawback of existing technology is that traditional screens are usually fixed to the end of the grinding chamber of a sand mill by multiple bolts or complex clamp structures. When the screen needs to be cleaned, inspected, or replaced, operators need to use special tools to disassemble the bolts or loosen the complex clamps one by one, which is a cumbersome and time-consuming process. Summary of the Invention

[0005] The purpose of this invention is to provide a sand mill screen that integrates multiple screens, is not prone to material blockage, and is easy to disassemble, so as to solve the above-mentioned shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A sand mill screen that integrates multiple screens, is not prone to clogging, and is easy to disassemble includes an mounting plate and multiple screen bodies disposed on the mounting plate, wherein the mounting plate is provided with a synchronous locking mechanism;

[0008] When multiple screen bodies are installed on the mounting plate, the synchronous locking mechanism locks the multiple screen bodies simultaneously. When it is necessary to remove the multiple screen bodies from the mounting plate, the synchronous locking mechanism unlocks the multiple screen bodies simultaneously.

[0009] The aforementioned multi-set integrated screen, which is not prone to material blockage and is easy to disassemble, includes a synchronous locking mechanism comprising a transmission ring rotatably mounted on the mounting plate, and a first locking part provided on the transmission ring;

[0010] It also includes a power assembly for driving the rotation of the transmission ring.

[0011] The aforementioned multi-screen integrated sand mill screen, which is not prone to clogging and is easy to disassemble, includes a power component comprising a cylinder, a transmission rod fixedly connected to the transmission ring, and the output end of the cylinder being rotatably connected to the transmission rod.

[0012] The aforementioned multi-screen integrated sand mill screen, which is not prone to clogging and is easy to disassemble, has a second locking part slidably provided on the mounting plate, and a connecting rod is provided between the second locking part and the transmission ring.

[0013] The aforementioned sand mill screen, which integrates multiple screens, is not prone to clogging, and is easy to disassemble, has notches on its screen body.

[0014] The aforementioned multi-screen integrated sand mill screen, which is not prone to material blockage and is easy to disassemble, has an observation window provided on the mounting plate.

[0015] The aforementioned multi-screen integrated, non-clogging, and easily disassembled sand mill screen comprises four screen bodies.

[0016] The aforementioned multi-screen integrated, non-clogging, and easily disassembled sand mill screen has multiple screen holes on its screen body, and all of the screen holes are constricted.

[0017] The aforementioned sand mill screen, which integrates multiple screens, is not prone to clogging, and is easy to disassemble, has inclined surfaces on both the first and second locking parts, and protrusions on the screen body, with the protrusions abutting against the inclined surfaces.

[0018] The aforementioned multi-screen integrated sand mill screen, which is not prone to clogging and is easy to disassemble, has a transfer component on the mounting plate for lifting the material from the bottom wall of the casing.

[0019] In the above technical solution, the present invention provides a sand mill screen that integrates multiple screens, is not prone to material blockage, and is easy to disassemble. By setting a synchronous locking mechanism on the mounting plate, multiple screen bodies are locked simultaneously when multiple screen bodies are installed. When multiple screen bodies need to be removed from the mounting plate, the synchronous locking mechanism unlocks multiple screen bodies simultaneously. In this way, the synchronous locking and unlocking of multiple screen bodies can be achieved, thereby facilitating the disassembly and installation of the screen bodies. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the screen body in a locked state according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the screen body in the unlocked state according to an embodiment of the present invention;

[0024] Figure 4 An exploded view diagram provided for an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the overall structure of the transmission ring provided in an embodiment of the present invention;

[0026] Figure 6 This is a schematic cross-sectional view of the screen body provided in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the overall structure provided for another embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the overall structure from another perspective, provided for another embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the connection structure between the lifting rod and the gear according to another embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Mounting plate; 2. Screen body; 3. Transmission ring; 4. First locking part; 5. Annular groove; 6. Through hole; 7. Limiting strip; 8. Limiting groove; 9. Cylinder; 10. Transmission rod; 11. Second locking part; 12. Connecting rod; 13. Slide rod; 14. Sliding sleeve; 15. Notch; 16. Observation window; 17. Screen hole; 18. Inclined surface; 19. Protrusion; 20. Rotating shaft; 21. Lifting rod; 22. Gear; 23. Tooth part; 24. Inclined part. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] In the description of this invention, it should be understood that, Figure 2 The position of the middle cylinder 9 relative to the observation window 16 in the vertical direction is "up" and "down". The terms "center", "length", "width", "degree", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0034] Reference Figure 1-9 The present invention provides a multi-set integrated screen for a sand mill that is not prone to clogging and is easy to disassemble. The screen includes a mounting plate 1 and multiple screen bodies 2 disposed on the mounting plate 1. The mounting plate 1 is provided with a synchronous locking mechanism.

[0035] When multiple screen bodies 2 are installed on the mounting plate 1, the multiple screen bodies 2 are locked simultaneously by the synchronous locking mechanism. When it is necessary to remove multiple screen bodies 2 from the mounting plate 1, the synchronous locking mechanism unlocks multiple screen bodies 2 simultaneously.

[0036] Specifically, the casing of the sand mill (not shown) is a horizontally arranged cylindrical structure, with one end as the feed end and the other end as the discharge end. The mounting plate 1 and the screen body 2 are both located at the discharge end of the casing. The screen body 2 has multiple strip-shaped filter holes. During material grinding, the material is added into the casing through the feed end, and after being ground by the rotor, it moves to the position of the screen body 2. Smaller materials pass through the filter holes of the screen body 2 and are discharged, while larger materials are isolated inside the casing for further grinding. This completes the material grinding process. Disassembling or installing the screen body 2 requires tightening multiple bolts, which is a requirement of existing technology. Without going into detail about the techniques, one of the core innovations of this invention lies in the provision of a synchronous locking mechanism on the mounting plate 1. This synchronous locking mechanism can be a structure where multiple electric push rods and multiple pins cooperate. By controlling whether the pins are inserted into the screen body 2 through the electric push rods, the screen body 2 can be locked and unlocked. The purpose of this arrangement is that when multiple screen bodies 2 are installed, the synchronous locking mechanism locks multiple screen bodies 2 simultaneously. When it is necessary to remove multiple screen bodies 2 from the mounting plate 1, the synchronous locking mechanism unlocks multiple screen bodies 2 simultaneously. This allows for the synchronous locking and unlocking of multiple screen bodies 2, thereby facilitating the disassembly and installation of the screen bodies 2.

[0037] As an alternative to the above-mentioned multiple electric push rods controlling the movement of multiple pins respectively, preferably, the synchronous locking mechanism includes a transmission ring 3 rotatably disposed on the mounting plate 1, and the transmission ring 3 is provided with a first locking part 4;

[0038] It also includes a power assembly for driving the transmission ring 3 to rotate. Specifically, an annular groove 5 is provided on the end face of the mounting plate 1, the transmission ring 3 is rotatably connected to the annular groove 5, and a limiting structure such as a protruding ring is provided between the two to prevent them from disengaging. The first locking part 4 is an arc-shaped plate structure protruding from the inner wall of the transmission ring 3, and there are multiple first locking parts 4. Multiple first locking parts 4 are arranged one-to-one with multiple screen bodies 2, and the distance between them and the mounting plate 1 is adapted to the thickness of the edge of the screen body 2. The power assembly can be a structure such as a motor to provide rotational force. Multiple through holes 6 adapted to the screen body 2 are provided on the mounting plate 1, and the radial dimension of the edge of the screen body 2 is larger than the radial dimension of the through holes 6. A limiting strip 7 is provided on the outer circumferential surface of the screen body 2, and a limiting groove 8 adapted to the limiting strip 7 is provided on the inner wall of the through hole 6. Under the action of the sliding connection between the limiting strip 7 and the limiting groove 8, the screen body 2 is locked in place. The screen body 2 cannot rotate relative to the through hole 6. The purpose of this design is that when installing the screen body 2, the first locking part 4 is placed away from the screen body 2, and then multiple screen bodies 2 are placed in multiple through holes 6 respectively. The transmission ring 3 is rotated by the power component, thereby driving multiple first locking parts 4 to rotate in the direction of multiple screen bodies 2 respectively, so that the sides of multiple first locking parts 4 abut against the sides of multiple screen bodies 2, thereby limiting the axial direction of the screen body 2. With the sliding connection between the limiting strip 7 and the limiting groove 8, the position of the screen body 2 can be locked. When it is necessary to remove the screen body 2 from the mounting plate 1, the transmission ring 3 is rotated in the opposite direction by the power component, so that the first locking parts 4 are away from the screen body 2, thus unlocking the screen body 2, which facilitates the installation and removal of the screen body 2.

[0039] Preferably, the power assembly includes a cylinder 9, and a transmission rod 10 is fixedly connected to the transmission ring 3. The output end of the cylinder 9 is rotatably connected to the transmission rod 10. Specifically, the end of the cylinder 9 furthest from the output end is rotatably mounted on the housing. The transmission rod 10 is preferably cylindrical and fixed to the side of the transmission ring 3. A rotating hole is provided on the output end of the cylinder 9, and the transmission rod 10 is rotatably connected to the rotating hole. The purpose of this arrangement is that, Figure 2 As shown, when the output end of cylinder 9 extends, it drives the transmission ring 3 to rotate counterclockwise. During this time, cylinder 9 will rotate itself to adapt. When the output end of cylinder 9 retracts, it drives the transmission ring 3 to rotate clockwise. During this time, cylinder 9 will also rotate itself to adapt. In this way, the reciprocating rotation of transmission ring 3 can be controlled by the extension and retraction of the output end of cylinder 9.

[0040] Furthermore, a second locking part 11 is slidably disposed on the mounting plate 1, and a connecting rod 12 is disposed between the second locking part 11 and the transmission ring 3. Specifically, the second locking part 11 is a rectangular plate-shaped structure arranged radially along the mounting plate 1. Multiple second locking parts 11 are disposed at adjacent positions of two screen bodies 2, and the distance between the second locking part 11 and the mounting plate 1 is adapted to the thickness of the edge of the screen body 2. The sliding arrangement means that an L-shaped sliding rod 13 is fixedly connected to the mounting plate 1, and a sliding sleeve 14 adapted to the sliding rod 13 is disposed on the second locking part 11. Under the action of the sliding connection between the sliding sleeve 14 and the sliding rod 13, the second locking part 11 is limited. One end of the connecting rod 12 is rotatably connected to the transmission ring 3, and the other end is rotatably connected to the second locking part 11. The purpose of this arrangement is that when installing the screen body 2, the cylinder 9 controls the second locking part 11 to be positioned away from the screen body. Position 2: After the screen body 2 is placed inside the through hole 6, the transmission ring 3 is rotated counterclockwise by the cylinder 9. Under the action of the connecting rod 12, the second locking part 11 slides along the slide rod 13 towards the central axis of the mounting plate 1, thereby allowing the second locking part 11 to slide to the side of the screen body 2, thus limiting the screen body 2. This increases the limiting points of the screen body 2, thereby improving the stability of the screen body 2 during installation. When it is necessary to remove the screen body 2, the transmission ring 3 is rotated clockwise by the power component, thereby controlling the second locking part 11 to slide away from the central axis of the mounting plate 1 under the action of the connecting rod 12. When the second locking part 11 is away from the screen body 2, the screen body 2 is unlocked.

[0041] Furthermore, the screen body 2 is provided with notches 15. Specifically, the notch 15 is a cross-sectional structure provided on the screen body 2, and a single screen body 2 is provided with four notches 15. The notches 15 are provided at positions close to each other on adjacent screen bodies 2, thereby making the adjacent screen bodies 2 more compact.

[0042] Furthermore, the mounting plate 1 is provided with an observation window 16. Specifically, the observation window 16 is located in the middle of the mounting plate 1, and the observation window 16 is made of wear-resistant quartz glass, used to observe the internal condition of the housing.

[0043] Furthermore, there are four screen bodies 2, which are arranged in an array on the mounting plate 1.

[0044] Preferably, the screen body 2 is provided with a plurality of screen holes 17 (i.e., the strip-shaped filter holes mentioned above), and the plurality of screen holes 17 are all constricted. Specifically, the constricted shape means that the size of the side closer to the shell is smaller (i.e., the inner side) than the size of the side farther from the shell (i.e., the outer side), which can reduce the distance and time that the material flows through the screen body 2, thereby reducing the clogging of the screen body 2.

[0045] Preferably, both the first locking part 4 and the second locking part 11 are provided with inclined surfaces 18, and the screen body 2 is provided with a protrusion 19, which abuts against the inclined surfaces 18. Specifically, the inclined surfaces 18 are provided on the surfaces of the first locking part 4 and the second locking part 11 (hereinafter referred to as the two locking parts for the sake of convenience), which are close to the mounting plate 1. The protrusion 19 is provided on the surface at the edge of the screen body 2, and its end is hemispherical. The purpose of this arrangement is that after the screen body 2 is inserted into the through hole 6 according to the position of the limiting groove 8, the position of the protrusion 19 corresponds to the position of the two locking parts. After multiple screen bodies 2 are placed, the output end of the control cylinder 9 extends, thereby causing the two locking parts to move toward the position of the protrusion 19. The advantages of this are that, firstly, under the action of the inclined surfaces 18 of the two locking parts, the protrusion 19 can be avoided from blocking the two locking parts as much as possible. After the protrusion 19 contacts the inclined surfaces 18, the two locking parts continue to move, and under the squeezing action of the inclined surfaces 18... Firstly, the screen body 2 can be pressed tightly to lock it. Secondly, when the protrusion 19 is positioned on the inclined surface 18, the output end of the control cylinder 9 is reciprocated (during the reciprocation of the output end of the cylinder 9, the projection of the protrusion 19 is always on the inclined surface 18). When the inclined surface 18 moves away from the protrusion 19, the screen body 2, under the pressure of the material inside the shell, will slide towards the outside of the through hole 6. Under the limiting action of the inclined surface 18, the screen body 2 has a maximum sliding distance. After the screen body 2 slides to the maximum distance, the two locking parts are controlled to move in opposite directions, so that the inclined surface 18 and the end of the protrusion 19 abut against each other. Under the action of the inclined surface 18, the screen body 2 slides towards the inside of the through hole 6. This reciprocating motion can drive the screen body 2 to shake back and forth to achieve the function of clearing blockage.

[0046] It should be noted that due to the horizontal arrangement of the shell, the material in the lower half of the shell is more than that in the upper half. This results in more material being filtered by the lower screen body 2 than by the upper screen body 2, leading to higher filtration pressure on the lower screen body 2 and making it more prone to clogging. In another embodiment of the invention, the mounting plate 1 is equipped with a transfer assembly for lifting material from the bottom wall of the shell. Specifically, the transfer assembly can be a pump-suction conveying structure, used to transport material from the lower half of the shell to the upper half, thereby reducing the screening pressure on the lower screen body 2 and increasing the screening pressure on the upper screen body 2, thus balancing the screening pressures of the upper and lower screen bodies 2.

[0047] Preferably, the transfer assembly includes a rotating shaft 20 rotatably mounted on the mounting plate 1, a lifting rod 21 is provided at one end of the rotating shaft 20, a gear 22 is provided at the other end of the rotating shaft 20, a toothed portion 23 adapted to the gear 22 is provided on the transmission ring 3, the gear 22 meshes with the toothed portion 23, and an inclined portion 24 is provided on the lifting rod 21. Specifically, the rotating shaft 20 is located near the inner wall of the transmission ring 3, the gear 22 is located on the outer side of the mounting plate 1, the lifting rod 21 is located on the inner side of the mounting plate 1, and the screen body 2 above is located on the rotation stroke of the lifting rod 21. When the two locking parts press the screen body 2 inward, the lifting rod 21 rotates upward. When the two locking parts gradually move away from the protrusion 19, the lifting rod 21 rotates downward. There are two inclined parts 24, which are symmetrically arranged about the lifting rod 21 and located on the surface of the lifting rod 21 near the screen body 2. The toothed part 23 is located on the inner wall of the transmission ring 3, and the lifting rod 21 is in contact with the side wall of the mounting plate 1. The purpose of this arrangement is that when the output end of the cylinder 9 extends to drive the transmission ring 3 to rotate counterclockwise, under the action of the connecting rod 12, the two locking parts will slide towards the protrusion 19, thereby pressing the screen body 2 towards the inside of the through hole 6. At the same time, the rotation of the transmission ring 3 will drive the screen body 2 to rotate counterclockwise. The toothed part 23 rotates synchronously. Under the action of the toothed part 23 meshing with the gear 22, it will drive the gear 22 to rotate counterclockwise. Correspondingly, under the action of the rotating shaft 20, it will drive the lifting rod 21 to rotate upward. The benefits of this are as follows: First, the lifting rod 21 can passively lift the material in the lower half area to achieve material transfer. Second, since the lifting rod 21 is in contact with the mounting plate 1, the surface of the mounting plate 1 can be scraped during the rotation of the lifting rod 21. Third, since the material is lifted to the top, the horizontal squeezing effect of the material is reduced, making it difficult for the material to pass through the screen body 2. At this time, the inclined part 24 on the lifting rod 21 will provide a horizontal force on the lifted material to assist the lifted material to pass through the screen body 2. Fourth, the horizontal force provided by the inclined part 24 can squeeze the material inside the screen hole 17, thereby achieving a further unblocking effect. When the output end of the cylinder 9 retracts to drive the transmission ring 3 to rotate in the opposite direction, the gear 22 and the lifting rod 21 will also rotate in the opposite direction to achieve reset.

[0048] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sand mill screen that integrates multiple screens, is not prone to clogging, and is easy to disassemble, comprising a mounting plate and multiple screen bodies disposed on the mounting plate, characterized in that, The mounting plate is equipped with a synchronous locking mechanism; When multiple screen bodies are installed on the mounting plate, the synchronous locking mechanism locks the multiple screen bodies simultaneously. When it is necessary to remove the multiple screen bodies from the mounting plate, the synchronous locking mechanism unlocks the multiple screen bodies simultaneously.

2. The sand mill screen with multiple integrated screens, which is not prone to clogging and is easy to disassemble, as described in claim 1, is characterized in that... The synchronous locking mechanism includes a transmission ring rotatably mounted on the mounting plate, and the transmission ring is provided with a first locking part; It also includes a power assembly for driving the rotation of the transmission ring.

3. The sand mill screen with multiple integrated screens, which is not prone to clogging and is easy to disassemble, as described in claim 2, is characterized in that... The power assembly includes a cylinder, a transmission rod is fixedly connected to the transmission ring, and the output end of the cylinder is rotatably connected to the transmission rod.

4. The sand mill screen with multiple integrated screens, which is not prone to clogging and is easy to disassemble, as described in claim 2, is characterized in that... A second locking part is slidably provided on the mounting plate, and a connecting rod is provided between the second locking part and the transmission ring.

5. The sand mill screen with multiple integrated screens, which is not prone to clogging and is easy to disassemble, as described in claim 1, is characterized in that... The screen body has notches.

6. The sand mill screen with multiple integrated screens, which is not prone to clogging and is easy to disassemble, as described in claim 1, is characterized in that... An observation window is provided on the mounting plate.

7. The sand mill screen with multiple integrated screens, which is not prone to clogging and is easy to disassemble, as described in claim 1, is characterized in that... The screen body consists of four parts.

8. The sand mill screen with multiple integrated screens, which is not prone to clogging and is easy to disassemble, as described in claim 1, is characterized in that... The screen body is provided with multiple screen holes, and all of the screen holes are constricted.

9. A sand mill screen with multiple integrated screens, which is not prone to clogging and is easy to disassemble, as described in claim 4, is characterized in that... Both the first locking part and the second locking part are provided with inclined surfaces, and the screen body is provided with protrusions, which abut against the inclined surfaces.

10. A sand mill screen with multiple integrated screens, not prone to clogging, and easy to disassemble, as described in claim 9, is characterized in that... The mounting plate is equipped with a transfer assembly for lifting the material from the bottom wall of the housing.

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