Sand mill high-frequency vibration cleaning anti-blocking device

Abstract

This invention discloses a high-frequency vibration cleaning and anti-clogging device for a sand mill, relating to the field of sand mill filtration technology. The device includes a sand mill cylinder with a drive motor mounted on it. The output end of the drive motor passes through the sand mill cylinder and is connected to a rotor. It also includes an anti-clogging unit comprising a screen. A mounting base is located at the bottom of the sand mill cylinder, inside the rotor. An annular screen is mounted on the mounting base, and an extension frame is located inside the annular screen on the mounting base. Multiple contact rings are evenly arranged along the axial direction on the outer wall of the extension frame, each contact ring being connected to the inner wall of the annular screen. Multiple vibrators are evenly arranged along the circumferential direction on the inner wall of the extension frame. The vibrators drive the annular screen to vibrate, ensuring the annular screen is constantly vibrating, thus preventing clogging by the grinding media.

Description

Technical Field

[0001] This invention relates to the field of sand mill filtration technology, specifically to a high-frequency vibration cleaning and anti-clogging device for sand mills. Background Technology

[0002] As is widely known, a sand mill is a high-efficiency grinding equipment widely used in industries such as chemicals, coatings, inks, and food, primarily for the ultrafine grinding and dispersion of materials. Its working principle involves the collision, shearing, and friction between high-speed rotating grinding media (such as zirconium beads or glass beads) and the material, achieving material refinement. The grinding media must remain inside the sand mill, while the material being ground is discharged after being ground within the mill. Existing sand mills employ a screen with a certain gap installed inside the mill to intercept and isolate the grinding media, preventing it from reaching the outside of the mill. The material being ground can then pass through the gaps in the screen to reach the outside of the mill, thus achieving the grinding process.

[0003] For example, the patent entitled "An Ultrasonic Cleaning and Anti-clogging Device" published on January 14, 2025, with announcement number CN222343029U, relates to an ultrasonic cleaning and anti-clogging device for a sand mill. It includes a grinding cylinder with an end cap fixedly installed at the discharge port. A grinding disc and a bushing are installed on a stirring shaft inside the grinding cylinder, with the grinding disc and bushing arranged at intervals. A rotor pin is fixedly installed at the top of the stirring shaft by bolts. A gap separator is installed inside the grinding cylinder, located inside the end cap. A flange is fixedly installed on the end cap, and a clip-on gasket is installed on the clip-on interface of the flange. An ultrasonic cleaning device is inserted into the clip-on interface of the flange, with the interface of the ultrasonic cleaning device aligned with the clip-on gasket. A clamp is provided around the clip-on gasket, and the flange, clip-on gasket, and ultrasonic cleaning device are fixed together by the clamp. This patent can solve the problem of easy clogging at the gap separator in traditional sand mills, which affects the discharge. It provides a reliable guarantee for the efficient operation of the sand mill, significantly reduces maintenance time, and extends the service life of the equipment.

[0004] The shortcomings of the existing technology are that, in actual application, the grinding media will become smaller in size after long-term collision and friction inside the sand mill. In addition, some grinding media will break into smaller particles during high-speed collision. When the size of the grinding media is similar to that of the screen gap, the grinding media will block the screen gap, thus preventing the sand mill from discharging material normally and causing the sand mill pressure to increase and be damaged. Summary of the Invention

[0005] The purpose of this invention is to provide a high-frequency vibration cleaning and anti-clogging device for sand mills, thereby solving the technical problems in related technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-frequency vibration cleaning and anti-clogging device for a sand mill, comprising a sand mill cylinder, a drive motor mounted on the sand mill cylinder, the output end of the drive motor penetrating the sand mill cylinder and connected to a rotor, and an anti-clogging unit comprising an annular screen, a mounting base located inside the rotor at the bottom of the sand mill cylinder, an annular screen mounted on the mounting base, an extension frame mounted on the mounting base inside the annular screen, a plurality of contact rings uniformly arranged along the axial direction on the outer wall of the extension frame, each contact ring being connected to the inner wall of the annular screen, and a plurality of vibrators uniformly arranged along the circumferential direction on the inner wall of the extension frame.

[0007] As mentioned above, the mounting base is provided with a discharge pipe for discharging material at the bottom of the annular screen.

[0008] As mentioned above, the ends of the annular screen are sealed by a pressure cap.

[0009] As described above, one end of the grinding cylinder is provided with a cover plate for sealing the grinding cylinder, the drive motor is mounted on the cover plate, the output end of the drive motor passes through the cover plate, and the other end of the grinding cylinder is provided with a cylinder end cap for sealing the grinding cylinder.

[0010] As mentioned above, the cover plate is provided with a feed pipe for conveying materials and grinding media.

[0011] As described above, a limiting ring is provided on the end cap of the cylinder, and the annular screen is slidably installed inside the limiting ring.

[0012] As described above, the limiting ring and the annular screen are connected by a plurality of uniformly arranged first elastic elements.

[0013] As described above, a transmission ring body is provided on the annular screen, a drive shaft is installed inside the rotor and the drive shaft passes through the transmission ring body, a power rod is installed on the outer wall inside the transmission ring body on the drive shaft, and a wave ring is provided on the transmission ring body.

[0014] As described above, a roller is provided on the power rod, and the roller abuts against the wave ring.

[0015] As described above, a sealing ring is provided on the outer side of the annular screen near the drive shaft for sliding sealing.

[0016] The beneficial effects of this invention are as follows: When grinding is required, the material and grinding media are conveyed into the grinding cylinder. The rotor is driven by a drive motor to rotate, causing the rotor to stir and collide with the grinding media and material in the grinding cylinder. Through the collision, shearing, and friction between the high-speed rotating grinding media (such as zirconium beads, glass beads, etc.) and the material, the material is refined. The refined material flows into the annular screen, where the grinding media and large-volume material are screened. The refined material is discharged from the grinding cylinder after passing through the annular screen. While the rotor is grinding the material, the vibrator is activated to drive the extension frame to vibrate. The extension frame drives the annular screen to vibrate through the contact ring, keeping the annular screen in a constant state of vibration. The continuously vibrating annular screen will not become clogged. Instead, when the grinding media and large-volume material reach the annular screen, the vibrating annular screen shakes them off, thus preventing clogging and improving the stability of the annular screen during screening. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a partial cross-sectional structural schematic diagram of an embodiment of the present invention;

[0019] Figure 2 A cross-sectional structural diagram of the position of the annular screen according to an embodiment of the present invention;

[0020] Figure 3 A cross-sectional structural schematic diagram of the vibrator position in one embodiment of the present invention;

[0021] Figure 4 A partial three-dimensional structural schematic diagram of another embodiment of the present invention;

[0022] Figure 5 For the present invention Figure 4 A schematic diagram of the cross-sectional structure;

[0023] Figure 6 A cross-sectional structural schematic diagram of another embodiment of the present invention;

[0024] Figure 7 A partial cross-sectional structural schematic diagram of the positions of the driving gear, internal gear, and transmission gear in another embodiment of the present invention;

[0025] Figure 8 This is a partial three-dimensional structural diagram of the wave ring position of the present invention;

[0026] Figure 9 A partial three-dimensional structural schematic diagram of the rotor position inside the grinding cylinder according to another embodiment of the present invention;

[0027] Figure 10 A partial three-dimensional structural diagram of the position of the annular screen inside the milling cylinder according to another embodiment of the present invention;

[0028] Figure 11 A cross-sectional structural schematic diagram of another embodiment of the present invention;

[0029] Figure 12 For the present invention Figure 11 A partial enlarged cross-sectional structural diagram at point M;

[0030] Figure 13 A cross-sectional structural schematic diagram of the driven disk position according to another embodiment of the present invention;

[0031] Figure 14 For the present invention Figure 13 A schematic diagram of the enlarged cross-sectional structure at point N;

[0032] Figure 15 This is a partial three-dimensional structural diagram of the annular wave groove of the present invention;

[0033] Figure 16 This is a schematic diagram of a partial three-dimensional structure inside the annular wave groove of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Grinding cylinder; 2. Drive motor; 3. Rotor; 4. Annular screen; 5. Mounting base; 6. Extension frame; 7. Contact ring; 8. Vibrator; 9. Cover plate; 10. Feed pipe; 11. Cylinder end cover; 12. Discharge pipe; 13. Pressure cap; 14. Limiting ring; 15. First elastic element; 16. Transmission ring body; 17. Drive shaft; 18. Power rod; 19. Wave ring; 20. Roller; 21. 21. Sealing ring; 22. Arc plate; 23. Drive gear; 24. Positioning ring; 25. Internal gear; 26. Transmission gear; 27. Inclined arc plate; 28. Discharge ring pipe; 29. ​​Partition plate; 30. Storage space; 31. Annular wave groove; 32. Through groove; 33. Driven disc; 34. Baffle; 35. Tooth; 36. Passive rack; 37. Second elastic element; 38. Sliding rod; 39. Ball bearing. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of the present invention, the following will be described in conjunction with the appendix. Figure 1 To be continued Figure 16 The present invention will now be described in further detail.

[0037] One embodiment of the present invention relates to a high-frequency vibration cleaning and anti-clogging device for a sand mill, comprising a sand mill cylinder 1, a drive motor 2 mounted on the sand mill cylinder 1, the output end of the drive motor 2 penetrating the sand mill cylinder 1 and connected to a rotor 3, and an anti-clogging unit comprising an annular screen 4. A mounting base 5 is provided at the bottom of the sand mill cylinder 1 inside the rotor 3, the annular screen 4 is mounted on the mounting base 5, and an extension frame 6 is provided on the mounting base 5 inside the annular screen 4. Multiple contact rings 7 are evenly arranged along the axial direction on the outer wall of the extension frame 6, and each contact ring 7 is connected to the inner wall of the annular screen 4. Multiple vibrators 8 are evenly arranged along the circumferential direction on the inner wall of the extension frame 6.

[0038] Specifically, the grinding cylinder 1 is a hollow barrel structure used to hold materials. The grinding cylinder 1 is horizontally positioned, and one end of it is fitted with a cover plate 9 to seal it, preventing leakage of materials and grinding media. A drive motor 2 is mounted on the cover plate 9. Both the grinding cylinder 1 and the drive motor 2 are mounted on a frame. The output end of the drive motor 2 passes through the cover plate 9 and is connected to a rotor 3. The rotor 3 is located inside the grinding cylinder 1. Different types of grinding rotors 3, such as turbine, pin, and disc types, can be selected. The shape of the rotor 3 can be adjusted and changed for different grinding objects (i.e., materials) to ensure more uniform grinding of the materials. A feed pipe 10 for conveying materials and grinding media is provided on plate 9. A cylinder end cap 11 for sealing the grinding cylinder 1 is provided at the other end of the cylinder end cap 11. A discharge pipe 12 for discharging material is provided on the cylinder end cap 11 at the bottom of the annular screen 4. A mounting base 5 is provided on the cylinder end cap 11. The mounting base 5 has an annular structure, and the annular screen 4 is mounted on the mounting base 5. The annular screen 4 is located inside the rotor 3. The end of the annular screen 4 is sealed by a pressure cap 13, which is located at one end inside the rotor 3, thus sealing the rotor 3 and the annular screen 4. An extension frame 6 is provided on the mounting base 5 inside the annular screen 4. Multiple contact rings 7 are evenly arranged along the axial direction on the outer wall of the extension frame 6. Each contact ring 7 is connected to the inner wall of the annular screen 4. Multiple vibrators 8 are evenly arranged along the circumferential direction on the inner wall of the extension frame 6. Each vibrator 8 is a device that converts electrical energy or other forms of energy into mechanical vibration. The grinding cylinder 1, rotor 3, and annular screen 4 are all coaxially mounted. When grinding is required, the material and grinding media are conveyed into the grinding cylinder 1 through the feed pipe 10. The drive motor 2 (which provides rotational power to the rotor 3) is started, causing the rotor 3 to rotate. The rotor 3 mixes the grinding media and material. The material is continuously impacted, rubbed, and squeezed by the pins on the rotor 3, generating compressive force, shear force, and impact force between the material and the grinding media (such as zirconium beads, glass beads, etc.). The impact force breaks up the agglomerates between materials, reducing their fineness and particle size, thus refining the material. The refined material flows into the annular screen 4, where it is used to screen the grinding media and large-volume materials. The refined material is discharged from the grinding cylinder through the discharge pipe 12. While the rotor 3 is grinding the material, the vibrator 8 is activated, causing the extension frame 6 to vibrate. The extension frame 6, through the contact ring 7, drives the annular screen 4 to vibrate, keeping the annular screen 4 in a constant state of vibration. This continuous vibration prevents clogging; instead, when grinding media and large-volume materials reach the annular screen 4, the vibrating screen shakes them off.This prevents clogging of the annular screen 4 by grinding media and large-volume materials, thus improving the stability of the screening process using the annular screen 4.

[0039] The shortcomings of the existing technology are that, in actual application, the grinding media will become smaller in size after long-term collision and friction inside the sand mill. In addition, some grinding media will break into smaller particles during high-speed collision. When the size of the grinding media is similar to that of the screen gap, the grinding media will block the screen gap, thus preventing the sand mill from discharging material normally and causing the sand mill pressure to increase and be damaged.

[0040] The beneficial effects of this invention are as follows: When grinding is required, the material and grinding media are conveyed into the mill cylinder 1. The rotor 3 is driven to rotate by the drive motor 2, causing the rotor 3 to stir and collide with the grinding media and material inside the mill cylinder 1. Through the collision, shearing, and friction between the high-speed rotating grinding media (such as zirconium beads, glass beads, etc.) and the material, the material is refined. The refined material flows into the annular screen 4, where the grinding media and large-volume material are screened. The refined material is discharged after passing through the annular screen 4. In the grinding cylinder, when the rotor 3 grinds the material, the vibrator 8 is turned on to drive the extension frame 6 to vibrate. The extension frame 6 drives the annular screen 4 to vibrate through the contact ring 7, so that the annular screen 4 is always vibrating. The continuously vibrating annular screen 4 will not be blocked. Instead, when the grinding media and large-volume materials reach the annular screen 4, the vibrating annular screen 4 will shake the grinding media and large-volume materials off the annular screen 4, thus preventing the grinding media and large-volume materials from blocking the annular screen 4, thereby improving the stability of the annular screen 4 in screening.

[0041] As an alternative to the above embodiments, in another embodiment of the present invention, a limiting ring 14 is provided on the end cap 11 of the cylinder, and the annular screen 4 is slidably installed inside the limiting ring 14; the limiting ring 14 and the annular screen 4 are connected by a plurality of uniformly arranged first elastic elements 15; a transmission ring 16 is provided on the annular screen 4, a drive shaft 17 is installed inside the rotor 3, and the drive shaft 17 passes through the transmission ring 16; a power rod 18 is installed on the outer wall of the drive shaft 17 located inside the transmission ring 16; a wave ring 19 is provided on the transmission ring 16; a roller 20 is provided on the power rod 18, and the roller 20 abuts against the wave ring 19; a sealing ring 21 is slidably sealed on the outer side of the annular screen 4 near the drive shaft 17.

[0042] Specifically, when the viscosity of the material being ground inside the mill cylinder 1 is high, the vibration waves generated by the vibrator 8 on the annular screen 4 are severely attenuated, and the vibration waves cannot effectively reach the surface of the annular screen 4, which greatly reduces the vibration generated by the vibrator 8 on the screen, thereby reducing the anti-clogging effect of the annular screen 4 on the material and grinding media. In this embodiment, a limiting ring 14 is provided on the cylinder end cover 11, and the annular screen 4 is slidably and sealingly installed on the limiting ring 14. As those skilled in the art know, the diameter of the limiting ring 14 is selectable. When the diameter of the limiting ring 14 is greater than the diameter of the annular screen 4 (the outer diameter of the limiting ring 14 is greater than the outer diameter of the annular screen 4, and the inner diameter of the limiting ring 14 is smaller than the inner diameter of the annular screen 4), the annular screen 4 is slidably installed inside the limiting ring 14.When the diameter of the limiting ring 14 is smaller than the diameter of the annular screen 4 (the outer diameter of the limiting ring 14 is smaller than the outer diameter of the annular screen 4, and the inner diameter of the limiting ring 14 is larger than the inner diameter of the annular screen 4), the limiting ring 14 is slidably installed inside the annular screen 4. The limiting ring 14 and the annular screen 4 are connected by a first elastic element 15 (the first elastic element 15 is a component capable of extension and retraction, preferably a spring). The annular screen 4 is provided with a transmission ring body 16, and the transmission ring body 16 is provided with a wave ring 19. The wave ring 19 has a surface with concave and convex arc surfaces that are interconnected. The ring structure is formed by connecting the drive motor 2 to rotate the rotor 3. The rotor 3 then drives the drive shaft 17 to rotate, which in turn drives the power rod 18 and roller 20 to rotate. Under the elastic force of the first elastic element 15, the annular screen 4 drives the transmission ring 16 and the wavy ring 19 to press against the surface of the roller 20. As the drive shaft 17 drives the power rod 18 and roller 20 to rotate, the power rod 18 and roller 20 move along the trajectory of the wavy ring 19. Since the wavy ring 19 is an annular structure with interconnected concave and convex arc surfaces, the power rod 18... Under the pressure of the corrugated ring 19 and the first elastic element 15, the power rod 18 and the roller 20 can drive the corrugated ring 19 and the annular screen 4 to reciprocate within the limiting ring 14, allowing the annular screen 4 to reciprocate linearly along its axial direction. Furthermore, due to the sliding seal provided by the sealing ring 21 between the annular screen 4 and the grinding cylinder 1, the material on the annular screen 4 will not enter the grinding cylinder 1 on the side of the drive shaft 17. This allows the annular screen 4 to perform reciprocating vibration operation when screening materials. While the rotor 3 drives the grinding media to grind the material, the rotor 3, through the drive shaft 17, power rod 18, and roller 20, drives the annular screen 4 to reciprocate and vibrate, thus preventing clogging of the annular screen 4. This achieves the anti-clogging effect of the annular screen 4 without the need for additional vibrators 8, extension frames 6, and contact rings 7. A single drive motor 2 is sufficient to rotate the rotor 3 to grind the material and also achieve the reciprocating vibration of the annular screen 4, thereby achieving the anti-clogging effect.

[0043] In another embodiment of the present invention, an arc plate 22 is provided on the bottom of the limiting ring 14 on the end cap 11 of the cylinder. The sealing ring 21 on the annular screen 4 is connected to the arc plate 22. The arc plate 22 rotates and seals the gap between the rotor 3 and the annular screen 4. A drive gear 23 is provided on the rotor 3. A positioning ring 24 is provided on the part of the arc plate 22 between the drive gear 23 and the transmission ring 16. A drive shaft 17 is rotatably mounted on the positioning ring 24. An internal gear 25 is connected to one end of the drive shaft 17 located outside the positioning ring 24. A power rod 18 is installed on the outer wall of the drive shaft 17 located inside the transmission ring 16. A wave ring 19 is provided on the transmission ring 16. A transmission gear 26 is rotatably mounted on the top of the arc plate 22. The transmission gear 26 and the drive gear 23 are meshed with each other, and the transmission gear 26 and the internal gear 25 are meshed with each other.

[0044] Specifically, because the rotor 3 rotates at a high speed when it collides with the material and grinding media, the rotation speed transmitted from the rotor 3 to the drive shaft 17, the power rod 18, and the roller 20 is also very high. However, the drive shaft 17, the power rod 18, and the roller 20 rotate at very high speeds on the wave ring 19. Excessive rotation speed of the power rod 18 and the roller 20 can easily cause the power rod 18 to break, thus affecting the vibration screening effect of the annular screen 4. In this embodiment, a drive gear 23 is provided at one end of the rotor 3. The power of the drive gear 23 comes from the rotation of the rotor 3. An arc plate 22 is provided at the bottom of the limiting ring 14 on the cover 11, preventing the arc plate 22 from rotating. The arc plate 22 seals the gap between the rotor 3 and the annular screen 4, preventing fined material from entering the gap between the bottom of the annular screen 4 and the rotor 3. During the rotation of the rotor 3 driven by the drive motor 2, the rotor 3 drives the drive gear 23 to rotate. Since the transmission gear 26 and the drive gear 23 are meshed with each other, and the transmission gear 26 and the internal gear 25 are meshed with each other, the drive gear 23 drives the transmission gear 26. The rotation of the drive gear 26 drives the internal gear 25 (the internal gear 25 is a gear with teeth machined on the inner side of the ring) to rotate. The internal gear 25 drives the drive shaft 17 to rotate. Since the circumference of the drive gear 23 is smaller than that of the drive gear 26, and the circumference of the drive gear 26 is smaller than that of the internal gear 25, the rotational speed transmitted from the drive gear 23 to the drive gear 26 decreases. The rotational speed transmitted from the drive gear 26 to the internal gear 25 further decreases, resulting in a decrease in the rotational speed transmitted from the rotor 3 to the drive shaft 17. This reduces the rotational speed of the drive shaft 17 in driving the power rod 18 and the roller 20. The rotational speed on the wave ring 19 is as follows: Since the wave ring 19 is a ring structure with concave and convex arc surfaces connected together, when the drive motor 2 drives the rotor 3 to rotate, the rotational speed transmitted from the rotor 3 to the drive shaft 17 decreases. The drive shaft 17 drives the wave ring 19 and the annular screen 4 to reduce the vibration rate through the power rod 18 and the roller 20, thereby providing a certain degree of protection for the power rod 18 and preventing the power rod 18 from breaking due to excessive rotational speed of the rotor 3 and the drive shaft 17. This makes the vibration anti-clogging of the annular screen 4 more stable.

[0045] In another embodiment of the present invention, the bottom of the annular screen 4 is provided with a sloping arc plate 27, which seals the bottom of the annular screen 4. The screen holes at the top of the annular screen 4 can screen materials. The rotor 3 is connected to a discharge ring pipe 28 near the end cover 11 of the cylinder. The discharge ring pipe 28 and the end cover 11 of the cylinder are rotatably sealed. Multiple partitions 29 are evenly arranged inside the discharge ring pipe 28 along its circumferential direction. There is a material storage space 30 between two adjacent partitions 29 inside the discharge ring pipe 28.

[0046] Specifically, because the bottom side of the annular screen 4 has sieve holes, even if the material is refined, it will still leak from the sieve holes into the rotor 3 and the grinding cylinder 1. This makes it difficult for the ground material inside the annular screen 4 to be discharged from the grinding cylinder 1 through the discharge pipe 12. Only when a lot of grinding media and material accumulate at the bottom of the rotor 3 and the bottom of the grinding cylinder 1 can the material inside the annular screen 4 be discharged from the grinding cylinder 1 through the discharge pipe 12. In this embodiment, by setting an inclined arc plate 27 at the bottom of the annular screen 4, the inclined surface of the inclined arc plate 27... The material slopes downwards from the end furthest from the end cap 11 towards the end closest to the end cap 11 (i.e., the inclined surface of the inclined arc plate 27 faces the discharge pipe 12). After grinding, the material enters the annular screen 4 and falls onto the inclined arc plate 27. Because the inclined arc plate 27 is inclined towards the discharge pipe 12, the material is discharged from the milling cylinder 1 through the discharge pipe 12 from the inclined surface of the inclined arc plate 27. However, a lot of material will still accumulate at the bottom of the milling cylinder 1. In this embodiment, a discharge ring pipe 28 is installed at the end of the rotor 3. The discharge ring pipe 28 and the rotor... Multiple through slots are evenly arranged in the connecting part of rotor 3. The through slots are designed to prevent the grinding media from entering the discharge ring pipe 28. After the rotor 3 and the grinding media have finished grinding the material, the material accumulates in the grinding cylinder 1 near the end cap 11. Simultaneously, rotor 3 drives the discharge ring pipe 28 to rotate, and the discharge ring pipe 28 drives the partition plate 29 to rotate. When the ground material moves to the discharge ring pipe 28, the refined material flows into the storage space 30 of the discharge ring pipe 28. The storage space 30 of the discharge ring pipe 28 carries the refined material to the top of the annular screen 4. This prevents the refined material from accumulating inside the mill cylinder 1. After the material enters the annular screen 4, it is discharged from the mill cylinder 1 through the inclined arc plate 27 and the discharge pipe 12. The rotation of the rotor 3 drives the discharge ring pipe 28 to rotate synchronously. The discharge ring pipe 28 stably discharges the material accumulated at the bottom of the mill cylinder 1. The discharge ring pipe 28 can not only perform preliminary screening of the material, but also transport the refined material from the bottom of the mill cylinder 1 to the annular screen 4, realizing the material discharge operation and preventing the material from accumulating at the bottom of the mill cylinder 1.

[0047] In another embodiment of the present invention, an annular wavy groove 31 is provided on the end cap 11 of the cylinder. The middle part of the annular wavy groove 31 is a raised arc surface structure, and the top and bottom of the annular wavy groove 31 are both flat arc surfaces. A through groove 32 is provided on the portion of the discharge ring pipe 28 located in each of the storage spaces 30. A driven disc 33 is rotatably mounted in each of the through grooves 32 via a positioning shaft. A baffle 34 is provided on each of the driven discs 33. A baffle is uniformly arranged on each of the driven discs 33 along its circumferential direction. Multiple teeth 35 are provided, and a passive rack 36 is slidably installed in each of the through grooves 32. Each passive rack 36 is meshed with its corresponding tooth 35. Each passive rack 36 is connected to its corresponding through groove 32 by a second elastic element 37. Each passive rack 36 is located outside the through groove 32 and is connected to a sliding round rod 38 at one end near the end cap 11 of the cylinder. Each sliding round rod 38 is slidably installed in an annular wave groove 31, and a ball bearing 39 is rotatably installed at the end of each sliding round rod 38.

[0048] Specifically, during the process of conveying refined material from the bottom to the top of the milling cylinder 1 through the storage space 30 separated by the partition plate 29 in the discharge ring pipe 28, a portion of the refined material will fall out from the end of the discharge ring pipe 28 near the rotor 3 as the discharge ring pipe 28 and storage space 30 rotate, resulting in incomplete discharge of the refined material by the discharge ring pipe 28. In this embodiment, during the rotation of the discharge ring pipe 28 driven by the rotor 3, the discharge ring pipe 28 drives the driven rack 36 to rotate, and the driven rack 36 drives the sliding rod 38 to slide along the trajectory of the annular wave groove 31. Since the middle part of the annular wave groove 31 is a raised arc surface structure, and the top and bottom of the annular wave groove 31 are both flat arc surfaces (e.g., Figure 15 and Figure 16As shown, during the sliding of the sliding rod 38 along the trajectory of the annular wave groove 31, when the sliding rod 38 slides along the flat arc surface at the bottom of the annular wave groove 31, under the elastic force of the second elastic element 37 (the second elastic element 37 is a component capable of telescoping and resetting, preferably a spring), the second elastic element 37 provides elastic force to the passive rack 36. The passive rack 36 drives the sliding rod 38 and the ball 39 to press against the flat arc surface at the bottom of the annular wave groove 31, and the baffle 34 is located in the through groove 32; when the sliding rod 38 slides along the flat arc surface at the bottom of the annular wave groove 31 to one of the rotation directions of the rotor 3, When the convex arc surface structure is in position on the side, the sliding rod 38 and the ball 39 slide along the trajectory of the convex arc surface structure, causing the convex arc surface structure to push the sliding rod 38 and the ball 39 to slide into one end of the through groove 32. The sliding rod 38 pushes the passive rack 36 to slide into one end of the through groove 32. The passive rack 36 compresses the second elastic element 37, causing the second elastic element 37 to be in a compressed state. Simultaneously, since the passive rack 36 is meshed with its corresponding teeth 35, the passive rack 36 drives the driven disk 33 to rotate through the teeth 35. The driven disk 33 drives the baffle 34 to rotate 90 degrees, thus... The baffle 34 closes the opening of the storage space 30 on the discharge ring pipe 28, so that the refined material in the storage space 30 will not fall out of the storage space 30 when the discharge ring pipe 28 rotates to the position of the raised arc surface structure. The top end of the raised arc surface structure and the top end of the inclined arc plate 27 coincide with each other until the discharge ring pipe 28 drives the sliding rod 38 to slide to the end of the stroke of the raised arc surface structure. When the discharge ring pipe 28 drives the sliding rod 38 to slide from the raised arc surface structure to the flat arc surface at the top of the annular wave groove 31, the sliding rod 38 loses the clamping effect of the raised arc surface structure, and the second elastic element 3 Under the rebound action of 7, the second elastic element 37 pushes the passive rack 36 to slide to one end of the through groove 32. The passive rack 36 drives the driven disk 33 to rotate through the teeth 35. The driven disk 33 drives the baffle 34 to rotate 90 degrees, so that the baffle 34 opens the opening of the storage space 30 on the discharge ring pipe 28, so that the opening of the storage space 30 at the top of the discharge ring pipe 28 is in the open state. The refined material in the storage space 30 at the top of the discharge ring pipe 28 is discharged from the opening position, so that the refined material falls to the top of the annular screen 4. The material at the top of the annular screen 4 is discharged from the inclined arc plate 27 and the discharge pipe 12 from the sand mill cylinder 1.When the sliding rod 38 slides from the flat arc surface at the top of the annular wave groove 31 to the raised arc surface structure on the other side of the rotor 3's rotation direction, the sliding rod 38 and the ball 39 slide along the trajectory of the raised arc surface structure, causing the raised arc surface structure to push the sliding rod 38 and the ball 39 to slide into one end of the through groove 32. The sliding rod 38 pushes the passive rack 36 to slide into one end of the through groove 32, and the passive rack 36 performs a squeezing operation on the second elastic element 37, so that the second elastic element 37 is in a compressed state. Simultaneously, the passive rack 36 drives the driven disc 33 to rotate through the teeth 35, and the driven disc 33 drives the baffle 34 to rotate 90 degrees, so that the baffle 34 closes the opening of the storage space 30 on the discharge ring pipe 28, until the discharge ring pipe 28 drives the sliding rod 38 to slide to the end of the stroke of the raised arc surface structure. The raised arc surface structure is set on both sides to adapt to the forward and reverse rotation of the rotor 3, so that no matter whether the rotor 3 rotates clockwise or... Rotating counterclockwise, the convex arc surface structure can drive the sliding rod 38 to move, thereby achieving the sealing operation of the baffle 34 on the storage space 30. When the discharge ring pipe 28 drives the sliding rod 38 to slide from the convex arc surface structure to the flat arc surface at the bottom of the annular wave groove 31, the sliding rod 38 loses the clamping effect of the convex arc surface structure. Under the rebound action of the second elastic element 37, the second elastic element 37 pushes the passive rack 36 to slide to one end of the through groove 32. The passive rack 36 drives the driven disc 33 to rotate through the teeth 35. The driven disc 33 drives the baffle 34 to rotate 90 degrees, so that the baffle 34 opens the opening of the storage space 30 on the discharge ring pipe 28, so that the opening of the storage space 30 at the top of the discharge ring pipe 28 is in the open state, so that the refined material at the bottom of the grinding cylinder 1 can enter the storage space 30, thereby realizing the re-conveying operation of the refined material. By repeating this process, the stable discharge operation of the refined material can be achieved. ;

[0049] 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 high-frequency vibration cleaning and anti-clogging device for a sand mill, comprising a sand mill cylinder, wherein a drive motor is mounted on the sand mill cylinder, and the output end of the drive motor passes through the sand mill cylinder and is connected to a rotor, characterized in that, It also includes an anti-clogging unit, which includes an annular screen. The bottom of the grinding cylinder is located inside the rotor and a mounting base is provided. The annular screen is provided on the mounting base and an extension frame is provided inside the annular screen on the mounting base. Multiple contact rings are evenly arranged on the outer wall of the extension frame along its axial direction. Each contact ring is connected to the inner wall of the annular screen. Multiple vibrators are evenly arranged on the inner wall of the extension frame along its circumferential direction.

2. The high-frequency vibration cleaning and anti-clogging device for a sand mill according to claim 1, characterized in that, The mounting base is equipped with a discharge pipe for discharging material at the bottom of the annular screen.

3. The high-frequency vibration cleaning and anti-clogging device for a sand mill according to claim 1, characterized in that, The ends of the annular screen are sealed by a pressure cap.

4. The high-frequency vibration cleaning and anti-clogging device for a sand mill according to claim 1, characterized in that, One end of the grinding cylinder is provided with a cover plate for sealing the grinding cylinder, the drive motor is mounted on the cover plate, the output end of the drive motor passes through the cover plate, and the other end of the grinding cylinder is provided with a cylinder end cap for sealing the grinding cylinder.

5. The high-frequency vibration cleaning and anti-clogging device for a sand mill according to claim 4, characterized in that, The cover plate is equipped with a feed pipe for conveying materials and grinding media.

6. The high-frequency vibration cleaning and anti-clogging device for a sand mill according to claim 4, characterized in that, A limiting ring is provided on the end cap of the cylinder, and the annular screen is slidably installed inside the limiting ring.

7. The high-frequency vibration cleaning and anti-clogging device for a sand mill according to claim 6, characterized in that, The limiting ring and the annular screen are connected by a plurality of uniformly arranged first elastic elements.

8. The high-frequency vibration cleaning and anti-clogging device for a sand mill according to claim 1, characterized in that, A transmission ring is provided on the annular screen, a drive shaft is installed inside the rotor and the drive shaft passes through the transmission ring, a power rod is installed on the outer wall inside the transmission ring on the drive shaft, and a wave ring is provided on the transmission ring.

9. A high-frequency vibration cleaning and anti-clogging device for a sand mill according to claim 8, characterized in that, A roller is provided on the power rod, and the roller abuts against the wave ring.

10. A high-frequency vibration cleaning and anti-clogging device for a sand mill according to claim 8, characterized in that, A sealing ring is provided on the outer side of the annular screen near the drive shaft for sliding sealing.

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