Horizontal energy-saving double-drive bidirectional dynamic classification sand mill

Abstract

The application discloses a horizontal energy-saving double-drive bidirectional dynamic grading sand mill, and relates to the field of sand mills, which comprises a machine body, a grinding rotor arranged in the machine body for grinding materials, and a discharging mechanism arranged on the machine body. The discharging mechanism comprises a discharging cylinder arranged above the machine body, a rectifier rotor and a grading component rotatably arranged in the discharging cylinder, an arc-shaped hole is formed in the rectifier rotor, and the grading component is arranged above the rectifier rotor. The horizontal energy-saving double-drive bidirectional dynamic grading sand mill provided by the application can extrude the grinding medium and the ground materials into the discharging cylinder under the action of the feeding pressure, change the vertical rotation of the grinding materials into horizontal rotation through the rectifier rotor, throw the grinding medium with large mass out of the arc-shaped hole in the rectifier rotor, and make the grinding medium fall back into the machine body under the action of gravity, so that the grinding medium can be greatly reduced around the grading component, and the discharging rate of the materials can be improved.

Description

Technical Field

[0001] This invention relates to the field of sand mills, specifically to a horizontal energy-saving dual-drive bidirectional dynamic grading sand mill. Background Technology

[0002] As is widely known, a sand mill is a device used for fine grinding and dispersing of materials, and is widely used in industries such as coatings, inks, pigments, cosmetics, food, and pharmaceuticals. When a sand mill is working, the material and grinding media are placed in the grinding drum. The agitator rotates at high speed, causing the grinding media to subject the material to intense shearing, collision, and friction, thereby gradually reducing the particle size to achieve the required fineness and uniformity.

[0003] For example, Chinese patent document CN113546731A, published on October 26, 2021, entitled "A Novel Nano-Sand Mill," includes: a frame; a grinding cylinder mounted on the frame, with a feed inlet at its left end; and a separation and discharge assembly including a drive mechanism, a main shaft with an internal discharge channel, several separators, and a discharge grading wheel; the main shaft, located outside the grinding cylinder, has a discharge inlet at its left end, and its right end extends horizontally through the grinding cylinder and is driven to rotate by the drive mechanism; several separators are located inside the grinding cylinder and sleeved on the main shaft; the discharge grading wheel is located on the right end of the main shaft and is interconnected; a discharge screen is detachably installed inside the discharge grading wheel, located between the main shaft and the discharge grading wheel. This invention results in a longer grinding path, a narrower particle size distribution, and higher efficiency.

[0004] The existing horizontal sand mills have a horizontal discharge method. The grinding media are affected by gravity and the same direction as the feed pressure. The grinding media will be distributed around the classifying components along with the slurry being ground. The grinding media can easily cause blockage of the classifying components, thereby reducing the material discharge rate. Summary of the Invention

[0005] The purpose of this invention is to provide a horizontal, energy-saving, dual-drive, bidirectional dynamic classifying sand mill to address the aforementioned shortcomings in the prior art.

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

[0007] A horizontal energy-saving dual-drive bidirectional dynamic classifying sand mill includes a machine body and a grinding rotor rotatably disposed inside the machine body for grinding materials. A discharge mechanism is provided on the upper part of the machine body.

[0008] The discharge mechanism includes a discharge cylinder disposed above the machine body. A rectifier rotor and a grading component are rotatably disposed inside the discharge cylinder. An arc hole is provided on the rectifier rotor, and the grading component is located above the rectifier rotor.

[0009] The aforementioned horizontal energy-saving dual-drive bidirectional dynamic classifying sand mill includes a classifying motor as the classifying component. The output shaft of the classifying motor has a discharge hole inside, and a first classifying wheel is fixedly connected to the output shaft. The first classifying wheel communicates with the discharge hole.

[0010] The aforementioned horizontal energy-saving dual-drive bidirectional dynamic classifying sand mill further includes a second classifying wheel located outside the first classifying wheel.

[0011] The aforementioned horizontal energy-saving dual-drive bidirectional dynamic grading sand mill also includes a lifting mechanism for driving the discharge mechanism to move vertically.

[0012] The above-mentioned horizontal energy-saving dual-drive bidirectional dynamic classifying sand mill, the second classifying wheel includes a top plate and a bottom plate, and a classifying rod is slidably arranged between the top plate and the bottom plate along the radial direction;

[0013] It also includes a power assembly for driving the grading rod to slide.

[0014] The aforementioned horizontal energy-saving dual-drive bidirectional dynamic classifying sand mill, wherein the power component includes a centrifugal rod, the top plate includes a connecting plate and a drive plate rotatably connected to the connecting plate, a spring is provided between the centrifugal rod and the connecting plate, and a first connecting rod is rotatably provided between the centrifugal rod and the drive plate;

[0015] It also includes a transmission component for converting the kinetic energy of the drive plate rotation into the sliding of the grader rod.

[0016] The aforementioned horizontal energy-saving dual-drive bidirectional dynamic grading sand mill includes a first transmission rod fixedly connected to the grading rod, a drive groove on the drive plate, the first transmission rod being slidably connected to the drive groove, an adapter groove on the bottom plate, and a second transmission rod fixedly connected to the grading rod, the second transmission rod being slidably connected to the adapter groove.

[0017] The aforementioned horizontal energy-saving dual-drive bidirectional dynamic grading sand mill also includes a drive motor, which is directly connected to the grinding rotor.

[0018] The aforementioned horizontal energy-saving dual-drive bidirectional dynamic classifying sand mill includes a classifying rod comprising a first part and a second part that are rotatably connected to each other; it also includes a drive assembly for driving the second part to rotate relative to the first part.

[0019] In the aforementioned horizontal energy-saving dual-drive bidirectional dynamic grading sand mill, the first transmission rod is rotatably connected to the first part, the drive assembly includes a second connecting rod fixedly connected to the first transmission rod, a third connecting rod is rotatably arranged on the drive plate, the second connecting rod is hinged to the third connecting rod, a support rod is provided on the first transmission rod, and the second part is fixedly connected to the support rod.

[0020] In the above technical solution, the horizontal energy-saving dual-drive bidirectional dynamic classifying sand mill provided by the present invention has a discharge cylinder at the top of the machine body, and a rectifier rotor is rotatably arranged inside the discharge cylinder. The grinding media and the ground material are squeezed into the discharge cylinder under the action of the feeding pressure. During this process, they will pass through the rotating rectifier rotor. The rectifier rotor changes the vertical rotation of the grinding material to horizontal rotation, which can throw the larger grinding media out from the arc-shaped hole inside the rectifier rotor and fall back into the machine body under the action of gravity. This can greatly reduce the distribution of grinding media around the classifying components, thereby improving the material discharge rate. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a side view structural diagram provided in an embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional structural diagram provided for an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional structural schematic diagram provided from another perspective in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the overall structure of the rectifier rotor provided in an embodiment of the present invention;

[0026] Figure 5 This is a top view schematic diagram of the rectifier rotor structure provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic cross-sectional view of the hierarchical component provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the overall structure of the grading component provided in another embodiment of the present invention;

[0029] Figure 8 This is an exploded view of a graded component provided in another embodiment of the present invention;

[0030] Figure 9 This is a partial cross-sectional structural schematic diagram provided in another embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the motion process of the grading rod provided in another embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the connection structure between the first transmission rod and the second part provided in another embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of the rotation process of the first transmission rod according to another embodiment of the present invention;

[0034] Figure 13 for Figure 2 Enlarged schematic diagram of a local structure at point A;

[0035] Figure 14 for Figure 8 Enlarged schematic diagram of the local structure at point B.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Machine body; 2. Grinding rotor; 3. Discharge cylinder; 4. Rectifying rotor; 5. Arc-shaped hole; 6. Grading motor; 7. Output shaft; 8. Discharge hole; 9. First grading wheel; 10. First channel; 11. Second channel; 12. Second grading wheel; 13. Third channel; 14. Lifting mechanism; 15. Top plate; 1501. Connecting plate; 1502. Drive plate; 16. Bottom plate; 17. Grading rod; 1701. First part; 1702. Second part; 18. Centrifugal rod; 19. Spring; 20. First connecting rod; 21. Mounting slot; 22. First transmission rod; 23. Drive slot; 24. Adaptor slot; 25. Second transmission rod; 26. Second connecting rod; 27. Third connecting rod; 28. Support rod; 29. ​​First abutment part; 30. Second abutment part; 31. Drive motor. Detailed Implementation

[0038] 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.

[0039] In the description of this invention, it should be understood that, Figure 2The position of the discharge cylinder 3 relative to the machine body 1 is upper, and vice versa. The terms "center", "width", "degree", "upper", "lower", "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 limitations on the present invention.

[0040] Reference Figure 1-14 The horizontal energy-saving dual-drive bidirectional dynamic classifying sand mill provided in this embodiment of the invention includes a machine body 1 and a grinding rotor 2 rotatably disposed inside the machine body 1 for grinding materials. A discharge mechanism is provided on the upper part of the machine body 1. The discharge mechanism includes a discharge cylinder 3 disposed above the machine body 1. A rectifier rotor 4 and a classifying component are rotatably disposed inside the discharge cylinder 3. An arc-shaped hole 5 is opened on the rectifier rotor 4. The classifying component is located above the rectifier rotor 4.

[0041] Specifically, the machine body 1 has a grinding chamber inside, and the grinding part of the grinding rotor 2 extends into the grinding chamber. When grinding materials, the materials and grinding media (preferably zirconium balls) are added to the grinding chamber. A power source drives the grinding rotor 2 to rotate at high speed, which in turn moves the grinding media. The shearing and impact forces generated by the collision of the grinding media grind the material particles into finer particles. The ground material is then separated from the grinding media by a separation device (such as a screen or gap separator). The grinding media remains in the chamber for continued use, while the ground material is discharged from the outlet. This completes the grinding process. This is existing technology and will not be elaborated further. One of the core innovations of this invention is that a discharge cylinder 3 is provided above the machine body 1, and a rectifier rotor 4 is rotatably arranged inside the discharge cylinder 3. It is also driven by a power source such as a motor. The purpose of this arrangement is that the grinding media and the ground material are squeezed into the discharge cylinder 3 under the action of the feeding pressure. During this process, they pass through the rotating rectifier rotor 4. The rectifier rotor 4 changes the vertical rotation of the grinding material to horizontal rotation, which can throw the larger grinding media out from the arc-shaped hole 5 inside the rectifier rotor 4 and fall back into the machine body 1 under the action of gravity. This can greatly reduce the distribution of grinding media around the grading component and improve the material discharge rate.

[0042] It should be noted that the system also includes a drive motor, which is directly connected to the grinding rotor. The drive motor can be a permanent magnet motor, which is directly connected to the grinding rotor 2. In this way, the grinding rotor 2 can be directly driven by the permanent magnet motor, reducing the energy loss caused by indirect transmission such as belt drive, and thus saving energy.

[0043] Preferably, the grading component includes a grading motor 6. The output shaft 7 of the grading motor 6 has a discharge hole 8 inside. A first grading wheel 9 is fixedly connected to the output shaft 7, and the first grading wheel 9 communicates with the discharge hole 8. Specifically, the grading motor 6 is arranged vertically, with its output shaft 7 extending into the discharge cylinder 3. A discharge pipe is rotatably connected to the output shaft 7. The discharge hole 8 is coaxially arranged with the output shaft 7, and its side wall has a first channel 10. The first grading wheel 9 is coaxially fixed to the outside of the output shaft 7 and is composed of multiple partitions. A second channel 11, which allows only ground material to pass through, exists between adjacent partitions. Thus, the first channel 10 and the second channel 11 connect the internal space of the discharge cylinder 3 with the discharge hole 8. There should be at least one rectifier rotor 4, preferably two, fixedly connected to the output shaft 7 and located below the first grading wheel 9. This arrangement allows the grading motor 6 to be activated while the grinding rotor 2 rotates to grind the material, driving the output shaft 7 to rotate at high speed. The advantage of this arrangement is that... Firstly, the output shaft 7 drives the rectifier rotor 4 to rotate at high speed to achieve rectification. Secondly, the output shaft 7 drives the first classifier wheel 9 to rotate at high speed. The grinding media with larger mass will move away from the first channel 10 under the action of centrifugal force to avoid the grinding media entering the discharge hole 8. The grinding material with smaller mass will enter the discharge hole 8 through the first channel 10 and the second channel 11 under the action of feeding pressure to achieve discharge. Thirdly, the rectifier rotor 4 is driven by an independent classifier motor 6. By adjusting the speed, different centrifugal forces are generated to adapt to the separation of grinding media and grinding materials with different solid contents (referring to the mass percentage of the remaining part of the emulsion or coating after drying under specified conditions), different viscosities, different particle sizes, and different slurry specific gravities.

[0044] Furthermore, the grading component also includes a second grading wheel 12, which is located outside the first grading wheel 9. Specifically, the second grading wheel 12 is cylindrical, and its sidewall has multiple third channels 13. The width of the third channels 13 is greater than the width of the second channels 11, meaning that both the grinding media and the material being ground can enter the interior of the second grading wheel 12. The purpose of this arrangement is that some of the grinding media and material are pushed into the second grading wheel 12 by the feeding pressure. The centrifugal force generated by the high-speed rotation of the second grading wheel 12 throws out a portion of the grinding media with a larger mass from the third channels 13. The remaining small amount of grinding media is distributed on the outer circumference of the first grading wheel 9. Due to the large centrifugal force generated by the high-speed rotation of the first grading wheel 9, and because the mass of the grinding media is greater than the mass of the material being ground, it is blocked outside the first grading wheel 9 and thrown out by the first grading wheel 9. The material with a smaller mass is discharged through the second channel 11, the first channel 10, and the discharge hole 8.

[0045] Furthermore, it also includes a lifting mechanism 14 for driving the vertical movement of the discharge mechanism. The lifting mechanism 14 can be an existing linear reciprocating drive assembly such as a vertically arranged hydraulic drive, which is used to lift the grading component above the discharge cylinder 3 to facilitate the maintenance and repair of the grading component.

[0046] It should be noted that when the speed of the grading motor 6 slows down abnormally, the centrifugal force it provides to the grinding media will decrease, making it easier for more grinding media to enter between the first grading wheel 9 and the second grading wheel 12, thereby blocking the second channel 11 and reducing the discharge efficiency. As another embodiment of the present invention, the second grading wheel 12 includes a top plate 15 and a bottom plate 16, and a grading rod 17 is slidably disposed between the top plate 15 and the bottom plate 16 along the radial direction; it also includes a power component for driving the grading rod 17 to slide. Specifically, the top plate 15 and the bottom plate 16 are both fixed to the output shaft 7. There are multiple grading rods 17, which are arranged in an array between the top plate 15 and the bottom plate 16. A gap is provided between adjacent grading rods 17, which is the third channel 13. The power assembly can be an existing linear reciprocating drive assembly such as multiple cylinders. The multiple cylinders are connected to the multiple grading rods 17 respectively. The purpose of this arrangement is that when the speed of the output shaft 7 is detected to be slowing down by the speed sensor or other structure, the power assembly controls the multiple grading rods 17 to move synchronously towards the central axis of the output shaft 7. Since the size of the grading rods 17 is constant, when the multiple grading rods 17 move towards the central axis of the output shaft 7, the circumference of the virtual circle formed between the multiple grading rods 17 will become smaller, which will also make the width of the third channel 13 smaller. At this time, the grinding media cannot enter the interior of the second grading wheel 12, thereby avoiding the first grading wheel 9 from becoming congested as much as possible. When the speed of the output shaft 7 returns to normal, the power assembly controls the multiple grading rods 17 to move synchronously in the opposite direction to drive the grading rods 17 to reset.

[0047] As an alternative to the above-mentioned multiple cylinders driving multiple classifying rods 17 to move respectively, preferably, the power assembly includes a centrifugal rod 18, the top plate 15 includes a connecting plate 1501 and a drive plate 1502 rotatably connected to the connecting plate 1501, a spring 19 is provided between the centrifugal rod 18 and the connecting plate 1501, and a first connecting rod 20 is rotatably provided between the centrifugal rod 18 and the drive plate 1502; it also includes a transmission component for converting the kinetic energy of the rotation of the drive plate 1502 into the sliding of the classifying rods 17. Specifically, the connecting plate 1501 is approximately an inverted cylindrical shape and is fixedly connected to the output shaft 7. The drive plate 1502 is a circular plate located inside the connecting plate 1501 and rotatably connected to it. An annular groove and a limiting ring are provided between the two to prevent them from disengaging. The centrifugal rod 18 is arranged radially along the connecting plate 1501 and is approximately rectangular. A counterweight can be provided at the end away from the connecting plate 1501 to increase the centrifugal force of the centrifugal rod 18. The discharge cylinder 3 has an inner opening on its side wall. An annular mounting groove 21 is provided. The centrifugal rod 18 extends through the side wall of the connecting plate 1501 into the mounting groove 21. The connecting plate 1501 has a downwardly protruding extension near the center. One end of the spring 19 is fixed to the centrifugal rod 18, and the other end is fixed to the extension. There are multiple centrifugal rods 18, which are arranged correspondingly with multiple grading rods 17. The upper surface of the drive plate 1502 and the side of the centrifugal rod 18 are provided with rotating shafts. The two ends of the first connecting rod 20 are rotatably connected to two rotating shafts respectively. The transmission component can be a cam or similar structure. The purpose of this configuration is that when the output shaft 7 rotates normally, the centrifugal force on the centrifugal rod 18 is greater than the elastic force of the spring 19. At this time, the centrifugal rod 18 will be located away from the central axis of the output shaft 7 (hereinafter referred to as the central axis for the sake of convenience). Similarly, the classifying rod 17 is also located away from the central axis of the output shaft 7. When the rotational speed of the output shaft 7 decreases, the centrifugal force on the centrifugal rod 18 will decrease. When it is less than the tension of the spring 19, it will be pulled towards the central axis by the spring 19, which will push the first connecting rod 20 to rotate. Furthermore, under the action of the first connecting rod 20, the drive plate 1502 is pushed to rotate around the central axis, and under the action of the transmission component, multiple classifying rods 17 are pushed synchronously towards the central axis. When the speed of the output shaft 7 returns to normal, that is, when the centrifugal force on the centrifugal rod 18 is greater than the elastic force of the spring 19, the centrifugal rod 18 moves away from the central axis and, under the action of the first connecting rod 20, drives the drive plate 1502 to rotate in the opposite direction. At this time, the classifying rods 17 will slide in the opposite direction to achieve passive switching of the position of the classifying rods 17.

[0048] Preferably, the transmission component includes a first transmission rod 22 fixedly connected to the grading rod 17, a driving groove 23 is provided on the driving plate 1502, the first transmission rod 22 is slidably connected to the driving groove 23, an adapter groove 24 is provided on the bottom plate 16, and a second transmission rod 25 is also fixedly connected to the grading rod 17, the second transmission rod 25 is slidably connected to the adapter groove 24. Specifically, the first transmission rod 22 is fixed to the top of the classifying rod 17, the drive groove 23 is an arc-shaped groove, and its number corresponds to the number of the classifying rod 17. The second transmission rod 25 is fixed to the bottom of the classifying rod 17, and the adapter groove 24 is arranged radially along the base plate 16, and its number also corresponds to the number of the classifying rod 17. An extension plate can be provided at the top of the classifying rod 17 to block the drive groove 23. The purpose of this arrangement is that when the output shaft 7 rotates at normal speed, the first transmission rod 22 is located at the end of the arc-shaped groove away from the central axis. At this time, when the output shaft 7 rotates, it will drive the base plate 16 to rotate. Under the action of the second transmission rod 25 and the adapter groove 24, it will drive the classifying rod 17 and the first transmission rod 22 to rotate synchronously around the central axis. Under the action of the first transmission rod 22 abutting against the arc-shaped groove, it will drive the drive plate 1502 as follows. Figure 6 As shown, when the output shaft 7 rotates clockwise, the centrifugal rod 18 slides towards the central axis when the output shaft 7 speed decreases. At this time, under the action of the first connecting rod 20, the drive plate 1502 will be pushed to rotate further clockwise relative to the classifying rod 17, causing the inner wall of the arc-shaped groove to abut against the first transmission rod 22, and driving the second transmission rod 25 and the classifying rod 17 to slide along the adapter groove 24 towards the central axis. When the output shaft 7 speed returns to normal, the centrifugal rod 18 will move in the opposite direction and pull the first connecting rod 20 in the opposite direction, so as to drive the drive plate 1502 to rotate in the opposite direction and drive multiple classifying rods 17 to slide in the opposite direction synchronously. In this way, while the drive plate 1502 rotates, multiple classifying rods 17 can slide back and forth synchronously along the adapter groove 24.

[0049] Furthermore, the first transmission rod 22 and the second transmission rod 25 are not coaxial. This prevents the grading rod 17 from rotating around the center of the first transmission rod 22 and the second transmission rod 25, thereby avoiding rotation of the grading rod 17 during sliding.

[0050] When the output shaft 7 speed decreases, causing the third channel 13 to shrink, the grinding media between the second classifying wheel 12 and the first classifying wheel 9 cannot be discharged. In another embodiment of the invention, the classifying rod 17 includes a first part 1701 and a second part 1702 rotatably connected to each other; it also includes a drive assembly for driving the second part 1702 to rotate relative to the first part 1701. Specifically, the connection point between the first part 1701 and the second part 1702 is an arc-shaped surface. The first transmission rod 22 and the second transmission rod 25 are both fixed to the first part 1701. The second part 1702 can rotate along the arc-shaped surface of the connection point. The drive assembly can be an existing structure that provides rotational force, such as a motor. This arrangement ensures that when the output shaft 7 speed decreases, the first part 1701 is positioned close to the central axis. The sliding of the first part 1701 at this time will cause the second part 1702 to synchronously move to a position close to the central axis. At this time, the drive assembly controls the second part 1702 to rotate relative to the central axis. Figure 10 The direction shown is clockwise rotation, meaning that the second part 1702 will swing towards the central axis. The benefits of this are twofold: First, it increases the space inside the third channel 13. When the second part 1702 swings towards the central axis, it extends into the internal space to intercept the grinding media. This also causes some of the grinding media between the second grading wheel 12 and the first grading wheel 9 to temporarily remain inside the third channel 13. At the same time, the grading rod 17 is moved intermittently by the power component to intermittently open the third channel 13, allowing the grinding media to be discharged uniformly. Second, the second part 1702 is rotated in the opposite direction by the drive component. During the reverse swing of the second part 1702, it provides a pushing force to the grinding media, accelerating the discharge of the grinding media.

[0051] In another embodiment of the present invention, the first transmission rod 22 is rotatably connected to the first part 1701, the driving assembly includes a second connecting rod 26 fixedly connected to the first transmission rod 22, a third connecting rod 27 is rotatably disposed on the driving plate 1502, the second connecting rod 26 is hinged to the third connecting rod 27, a support rod 28 is disposed on the first transmission rod 22, and the second part 1702 is fixedly connected to the support rod 28. Specifically, the second connecting rod 26 is fixed to the outer peripheral surface of the first transmission rod 22 and close to the top of the first transmission rod 22. The third connecting rod 27 is rotatably mounted on the upper surface of the drive plate 1502 via a fixed shaft, and the ends of the second connecting rod 26 and the third connecting rod 27 that are close to each other are hinged. The first transmission rod 22 extends into the interior of the first part 1701 and can rotate relative to the first part 1701. The support rod 28 is fixed to the outer peripheral surface of the first transmission rod 22. A clearance hole is provided on the side wall of the first part 1701. The end of the support rod 28 away from the first transmission rod 22 passes through the clearance hole and is fixed to the second part 1702. Since the swing amplitude of the second part 1702 is small, the clearance hole will not be exposed during the swing. In this embodiment, the axis of rotation of the second part 1702 relative to the first part 1701 is coaxial with the axis of the first transmission rod 22. The purpose of this arrangement is to... When the output shaft 7's speed decreases, it drives the drive plate 1502 to rotate relative to the connecting plate 1501 around the central axis. This causes the fixed shaft and the third connecting rod 27 to rotate relative to the first transmission rod 22, and exerts a pulling force on the second connecting rod 26. Since the first transmission rod 22 does not rotate along the central axis, the second connecting rod 26 pulls the first transmission rod 22 to rotate itself for adaptation. This causes the support rod 28 to rotate around the center of the first transmission rod 22. Under the action of the support rod 28, the second part 1702 swings synchronously, thus achieving the passive swing of the second part 1702. When the output shaft 7's speed returns to normal, it drives the drive plate 1502 to rotate in the opposite direction. This causes the first transmission rod 22 to rotate in the opposite direction under the action of the second connecting rod 26 and the third connecting rod 27, which in turn causes the second part 1702 to rotate in the opposite direction for reset.

[0052] Furthermore, the centrifugal rod 18 has a first abutting part 29, and the discharge cylinder 3 has a second abutting part 30. When the grading rod 17 is located near the central axis of the output shaft 7, the second abutting part 30 is located on the movement stroke of the first abutting part 29. Specifically, the first abutment 29 is located on the lower surface of the centrifugal rod 18 and is an arc-shaped surface. The second abutment 30 is disposed on the side wall of the mounting groove 21. Preferably, there are two centrifugal rods 18, which are symmetrically arranged about the central axis. The purpose of this arrangement is that when the output shaft 7 rotates normally, the distance from the first abutment 29 to the central axis is greater than the distance from the second abutment 30 to the central axis. That is, at this time, the first abutment 29 will not contact the second abutment 30. When the speed of the output shaft 7 decreases, the centrifugal rod 18 will slide towards the central axis, and drive the first abutment 29 to move synchronously. At this time, the second abutment 30 is located on the movement stroke of the arc-shaped surface of the first abutment 29. When the first abutment 29 rotates, its arc-shaped surface will abut against the second abutment 30. The reaction force provided by 30 will cause the first abutment part 29 to move away from the central axis, and store force on the spring 19, and drive the centrifugal rod 18 to move synchronously. Through the transmission component, it will drive the classifying rod 17 to move away from the central axis, so as to increase the size of the third channel 13. That is, at this time, the third channel 13 is passively and intermittently opened to facilitate the discharge of grinding media. When the first abutment part 29 and the second abutment part 30 have finished abutting, the elastic force of the spring 19 is released, which will drive the centrifugal rod 18 to move in the opposite direction, and drive the classifying rod 17 to move towards the central axis to realize the reset of the classifying rod 17. Since there are two centrifugal rods 18 and two first abutment parts 29, the third channel 13 will be passively opened twice in one rotation cycle of the output shaft 7.

[0053] 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 horizontal energy-saving dual-drive bidirectional dynamic classifying sand mill, comprising a machine body and a grinding rotor rotatably disposed inside the machine body for grinding materials, characterized in that, The machine body is equipped with a discharge mechanism; The discharge mechanism includes a discharge cylinder disposed above the machine body. A rectifier rotor and a grading component are rotatably disposed inside the discharge cylinder. An arc-shaped hole is opened on the rectifier rotor, and the grading component is located above the rectifier rotor. The grading component includes a grading motor, the output shaft of which has a discharge hole, and a first grading wheel is fixedly connected to the output shaft, the first grading wheel communicating with the discharge hole; The grading component further includes a second grading wheel, which is located outside the first grading wheel; The second grading wheel includes a top plate and a bottom plate, and a grading rod is slidably disposed between the top plate and the bottom plate along the radial direction, with the gap between adjacent grading rods forming a third channel; It also includes a power assembly for driving the grading rod to slide; The power assembly includes a centrifugal rod, the top plate includes a connecting plate and a drive plate rotatably connected to the connecting plate, a spring is provided between the centrifugal rod and the connecting plate, and a first connecting rod is rotatably provided between the centrifugal rod and the drive plate; It also includes a transmission component for converting the kinetic energy of the drive plate rotation into the sliding of the grading rod; The transmission component includes a first transmission rod fixedly connected to the grading rod, a driving groove is provided on the driving plate, the first transmission rod is slidably connected to the driving groove, an adapter groove is provided on the bottom plate, and a second transmission rod is also fixedly connected to the grading rod, the second transmission rod being slidably connected to the adapter groove. The grading rod includes a first part and a second part that are rotatably connected to each other; it also includes a drive assembly for driving the second part to rotate relative to the first part; The first transmission rod is rotatably connected to the first part, the drive assembly includes a second connecting rod fixedly connected to the first transmission rod, a third connecting rod is rotatably provided on the drive plate, the second connecting rod is hinged to the third connecting rod, a support rod is provided on the first transmission rod, and the second part is fixedly connected to the support rod; The second connecting rod is fixed to the outer peripheral surface of the first transmission rod and close to the top of the first transmission rod. The third connecting rod is rotatably mounted on the upper surface of the drive plate through a fixed shaft, and the ends of the second and third connecting rods that are close to each other are hinged. The first transmission rod extends into the interior of the first part and can rotate relative to the first part. The support rod is fixed to the outer peripheral surface of the first transmission rod. A clearance hole is provided on the side wall of the first part. The end of the support rod away from the first transmission rod passes through the clearance hole and is fixed to the second part. The axis of rotation of the second part relative to the first part is coaxial with the axis of the first transmission rod. When the output shaft speed decreases, it drives the drive plate to rotate relative to the connecting plate around the central axis. This causes the fixed shaft and the third connecting rod to rotate relative to the first transmission rod, and pulls on the second connecting rod. Since the first transmission rod does not rotate along the central axis, the second connecting rod pulls the first transmission rod to rotate for adaptation. This causes the support rod to rotate along the center of the first transmission rod, and under the action of the support rod, the second part swings synchronously, achieving passive swing of the second part. This increases the space inside the third channel, and when the second part swings towards the central axis, it extends into the internal space to intercept the grinding media. This also causes some of the grinding media between the second and first grading wheels to temporarily exist inside the third channel. The power component controls the grading rod to move intermittently, opening the third channel intermittently. When the output shaft speed returns to normal, it drives the drive plate to rotate in the opposite direction, which in turn causes the first transmission rod to rotate in the opposite direction under the action of the second and third connecting rods. This, in turn, causes the second part to rotate in the opposite direction. During the reverse rotation of the second part, it provides a pushing force to the grinding media to accelerate the discharge of the grinding media. The centrifugal rod is provided with a first abutting part, and the discharge cylinder is provided with a second abutting part. When the classifying rod is located near the central axis of the output shaft, the second abutting part is located on the movement stroke of the first abutting part. The first abutting part is located on the lower surface of the centrifugal rod, which is an arc-shaped surface. An annular mounting groove is opened in the side wall of the discharge cylinder, and the second abutting part is set on the inner wall of the mounting groove. When the output shaft rotates normally, the distance from the first abutment to the central axis is greater than the distance from the second abutment to the central axis, so that the first abutment will not contact the second abutment. When the output shaft speed decreases, the centrifugal rod will slide towards the central axis and drive the first abutment to move synchronously, so that the second abutment is located on the movement stroke of the arc surface of the first abutment. When the first abutment rotates, the arc surface of the first abutment will abut against the second abutment. The reaction force provided by the second abutment will drive the first abutment to move away from the central axis, and store the spring force, and drive the centrifugal rod to move synchronously. Through the transmission component, it will drive the classifying rod to move away from the central axis, so as to increase the size of the third channel, so that the third channel will open passively and intermittently to facilitate the discharge of grinding media. When the first abutment and the second abutment have finished abutting, the spring force is released, which will drive the centrifugal rod to move in the opposite direction and drive the classifying rod to move towards the central axis.

2. The horizontal energy-saving dual-drive bidirectional dynamic classifying sand mill according to claim 1, characterized in that, It also includes a lifting mechanism for driving the discharge mechanism to move vertically.

3. The horizontal energy-saving dual-drive bidirectional dynamic classifying sand mill according to claim 1, characterized in that, It also includes a drive motor, which is directly connected to the grinding rotor.

Images