A vertical sand mill

Abstract

The application discloses a vertical sand mill, and relates to the technical field of sand mills, which comprises a device main body, a grinding bin, a main shaft and a driving device for driving the rotation of the main shaft, a plurality of groups of sand grinding discs are uniformly arranged on the outer part of the main shaft along the length direction, and an annular water guide bin for cooling the interior of the grinding bin is arranged on the inner wall of the grinding bin. In the application, the annular water guide bin and the heat dissipation mechanism are matched, so that a stable and orderly flow path of cooling water is formed in the main shaft and the grinding bin. The flow path ensures that the cooling water can fully and continuously absorb the heat generated in the grinding process, effectively prevents the occurrence of local overheating, and through the heat dissipation mode combining air cooling and water cooling, the high-temperature cooling water forms strong heat exchange with external cold air when passing through the water guide pipe, so that the cooling water temperature is effectively reduced, heat transmission to the subsequent cooling link is avoided, and the stability and reliability of the grinding process are ensured.

Description

Technical Field

[0001] This invention relates to the field of sand mill technology, and specifically to a vertical sand mill. Background Technology

[0002] A sand mill is a device that primarily relies on the high-speed rotation between grinding media and materials to perform grinding operations. The intense motion between the grinding media generates shearing, compressing, and frictional forces, causing the material within the grinding media to deform and creating a stress field. When the stress reaches the yield or fracture limit of the material particles, the material undergoes plastic deformation or breaks. The interaction between the grinding media and the material is achieved through a stirring device installed in the grinding cylinder of the sand mill. During operation, the sand mill easily generates heat, thus requiring cooling of the grinding cylinder.

[0003] Chinese patent publication number CN206382074U discloses a vertical sand mill, including a material cylinder, a rotating shaft, and a dispersing disc. The number of dispersing discs is two or more, and the dispersing discs are connected to the rotating shaft. The dispersing discs are eccentric wheels, and each dispersing disc is connected together by a reinforcing column, which is located at the edge of the dispersing disc. The material cylinder is equipped with a cooling pipe. This novel sand mill uses the eccentric wheel to drive the reinforcing column to stir the pigment. The use of the eccentric wheel can make the stirring effect of the reinforcing column more obvious.

[0004] However, the aforementioned patents still have the following shortcomings: Sand mills generally use a stirring and grinding method to perform high-speed stirring and shearing of materials to achieve the grinding of coatings. During operation, the materials move within the sand mill's tank, forming a large whole. However, during high-speed stirring, the materials are driven by the high-speed rotation of the sand mill mechanism, causing both the sand mill and the materials to generate a large amount of heat. The aforementioned patents can only cool the inner wall of the cylinder and cannot effectively solve the problem of internal heat accumulation caused by friction and collision during high-speed stirring. This leads to an increase in material temperature, which may affect the grinding effect and the quality stability of the product. Furthermore, because the internal heat is not easily dissipated during the overall movement of the materials, prolonged high temperatures may also cause material deterioration, directly affecting product quality.

[0005] To address the above problems, a vertical sand mill is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a vertical sand mill to solve the above-mentioned problems.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0008] A vertical sand mill includes a main body, a grinding chamber, a main shaft, and a drive device for driving the main shaft to rotate. The grinding chamber is installed on one side of the main body, and the main shaft is rotatably disposed inside the grinding chamber. The drive device is installed on the top side of the main body, and the output shaft of the drive device is coaxially connected to the main shaft. Multiple sets of grinding discs are evenly installed along the length of the main shaft. An annular water-guiding chamber for cooling the interior of the grinding chamber is provided on the inner wall. The annular water-guiding chamber divides the grinding chamber into a feeding zone, a grinding zone, and a discharging zone. The feeding area is equipped with a filtration mechanism for filtering materials, the grinding area is equipped with a cleaning mechanism for cleaning the inner wall of the annular water guiding chamber, and the unloading area is equipped with a heat dissipation mechanism. The filtration mechanism is fixedly sleeved on the outside of the main shaft and located above the annular water guiding chamber. The cleaning mechanism is fixed at the bottom end of the filtration mechanism and abuts against the annular water guiding chamber. The heat dissipation mechanism is located below the annular water guiding chamber and is movably sleeved with the main shaft. A flow guiding cavity is opened inside the main shaft, and the heat dissipation mechanism connects the flow guiding cavity with the annular water guiding cavity.

[0009] As a preferred embodiment of the present invention, the annular water guiding chamber includes an annular cylinder, two annular plates, two baffles, and two sets of arc-shaped inclined plates. The two annular plates are arranged sequentially from top to bottom. The annular cylinder is fixedly connected to the inner side of the two annular plates, and the upper and lower ends of the annular cylinder are flush with the upper and lower surfaces of the two annular plates, respectively. A gap is formed between the outer wall of the annular cylinder and the inner wall of the grinding chamber. The two baffles are arranged vertically and symmetrically on both sides inside the gap, dividing the gap into a first water guiding chamber and a second water guiding chamber that are interconnected. Cold water inlet pipe and cold water outlet pipe are respectively provided on both sides of the grinding chamber and are connected to the first water guiding chamber and the second water guiding chamber. The two sets of arc-shaped inclined plates are evenly arranged along the length direction of the baffles, and each set of arc-shaped inclined plates has staggered water outlets.

[0010] As a preferred embodiment of the present invention, the heat dissipation mechanism includes a base plate, a sealing pipe, and two water guide pipes. The base plate is horizontally disposed inside the grinding chamber and located in the feeding area. The sealing pipe is fixed at the top axis of the base plate and extends into the flow guide cavity, and is rotatably and sealed to the main shaft. A partition plate is vertically fixed inside the flow guide cavity, which divides the flow guide cavity into two parts. The two water guide pipes are symmetrically fixed at the bottom of the base plate, and one end of each water guide pipe extends through the base plate and into the sealing pipe. The other ends of each water guide pipe pass through the base plate, the feeding area, and the annular water guide chamber in sequence, and are connected to the first water guide cavity and the second water guide cavity respectively.

[0011] As a preferred embodiment of the present invention, the material feeding area is provided with a funnel-shaped shaking bag, the bottom of the grinding chamber is provided with a through hole, a fan is installed inside the through hole, and the bottom of the base plate is provided with a connecting opening on both sides.

[0012] In a preferred embodiment of the present invention, the two baffles and the partition plate are located on the same vertical line, and the upper and lower ends of the two baffles are respectively fixedly connected to the two annular plates.

[0013] In a preferred embodiment of the present invention, the filtration mechanism includes a filter bucket, which is inverted and sleeved on the main shaft and fixedly connected to the main shaft.

[0014] As a preferred embodiment of the present invention, the bottom outer diameter of the filter bucket is equal to the inner diameter of the annular water guiding chamber, and the bottom of the filter bucket extends into the interior of the annular water guiding chamber.

[0015] As a preferred embodiment of the present invention, a feed pipe communicating with the feeding area is connected to one side of the top of the grinding chamber, and a coarse material discharge pipe is connected to the lower side of the outer wall of the grinding chamber away from the feed pipe. One end of the coarse material discharge pipe is connected to the surface of the annular water guide chamber and faces the outside of the filter bucket.

[0016] As a preferred embodiment of the present invention, the cleaning mechanism includes two fixed rings and two scrapers. The two fixed rings are arranged sequentially from top to bottom in the grinding zone. One of the fixed rings is fixedly connected to the bottom of the filter bucket, and the two scrapers are symmetrically fixed to the bottom of the fixed ring. The other fixed ring is fixedly connected to the bottom end of the two scrapers. The outer diameter of the two fixed rings is equal to the inner diameter of the annular water guiding chamber, and the outer wall of the two scrapers abuts against the inner wall of the annular water guiding chamber.

[0017] As a preferred embodiment of the present invention, the bottom of the base plate is connected to an L-shaped discharge pipe that communicates with the inside of the shaking bag, and the other end of the L-shaped discharge pipe passes through the grinding chamber and extends to the outside of the grinding chamber.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. In this invention, the combination of an annular water guide chamber and two water guide pipes achieves a stable and orderly flow path for cooling water within the spindle and grinding chamber. This flow path ensures that the cooling water can comprehensively and continuously absorb the heat generated during the grinding process, effectively preventing localized overheating. Simultaneously, the annular water guide chamber design allows for thorough heat exchange between the cooling water and the outer wall of the grinding chamber during flow, further improving heat dissipation.

[0020] 2. This invention installs a fan at the through hole. By starting the fan, external cold air is delivered to the bottom of the base plate. The cold air then enters the material feeding area through two connecting ports and is located outside the shaking bag. When the high-temperature cooling water passes through the water guide pipe, it forms a strong heat exchange with the external cold air. This not only effectively reduces the temperature of the cooling water but also prevents the heat from being transferred to subsequent cooling stages. Furthermore, when the external cold air blows onto the shaking bag, it causes the bag to shake. This shaking action helps to further shake off the material adhering to the inner wall of the shaking bag, avoiding the problem of poor material feeding caused by material accumulation. This more effectively ensures the continuity and uniformity of material feeding. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] Figure 1 This invention provides a schematic diagram of the overall structure of a vertical sand mill;

[0023] Figure 2 A side sectional view of the grinding chamber is provided for this invention;

[0024] Figure 3 This invention provides a front structural cross-sectional view of the grinding chamber;

[0025] Figure 4 A top sectional view of the grinding chamber is provided for this invention;

[0026] Figure 5 A schematic diagram of the annular water-conducting chamber is provided for this invention;

[0027] Figure 6 A bottom view of the annular water-guiding chamber is provided for the present invention;

[0028] Figure 7 A schematic diagram of the cleaning mechanism is provided for this invention.

[0029] The labels in the diagram represent the following:

[0030] 1. Main body of the equipment; 2. Grinding chamber; 3. Main shaft; 4. Drive unit; 5. Grinding disc; 6. Annular water guide chamber; 7. Filtration mechanism; 8. Cleaning mechanism; 9. Heat dissipation mechanism;

[0031] 11. Feeding area; 12. Grinding area; 13. Discharging area; 14. Feed pipe; 15. Coarse material discharge pipe; 16. L-shaped discharge pipe; 31. Guide cavity; 61. Annular cylinder; 62. Annular plate; 63. Baffle; 64. Arc-shaped inclined plate; 65. Gap; 66. First water guide cavity; 67. Second water guide cavity; 68. Cold water inlet pipe; 69. Cold water outlet pipe; 70. Drain; 71. Filter bucket; 81. Fixing ring; 82. Scraper; 91. Bottom plate; 92. Sealing pipe; 93. Water guide pipe; 94. Divider plate; 95. Shaking bag; 96. Through hole; 98. Connecting port. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figure 1 - Figure 7 As shown, this invention provides a vertical sand mill, including a main body 1, a grinding chamber 2, a main shaft 3, and a drive device 4 for driving the main shaft 3 to rotate. The grinding chamber 2 is installed on one side of the main body 1, and the main shaft 3 is rotatably disposed inside the grinding chamber 2. The drive device 4 is installed on the top side of the main body 1, and the output shaft of the drive device 4 is coaxially connected to the main shaft 3. Multiple sets of grinding discs 5 are evenly installed along the length of the main shaft 3. An annular water guide chamber 6 is provided on the inner wall of the grinding chamber 2 for cooling the interior of the grinding chamber 2. The annular water guide chamber 6 divides the interior of the grinding chamber 2 into a feeding area 11, a grinding area 12, and a... The feeding area 13 and the loading area 11 are equipped with a filter mechanism 7 for filtering materials. The grinding area 12 is equipped with a cleaning mechanism 8 for cleaning the inner wall of the annular water guide chamber 6. The feeding area 13 is equipped with a heat dissipation mechanism 9. The filter mechanism 7 is fixedly sleeved on the outside of the main shaft 3 and located above the annular water guide chamber 6. The cleaning mechanism 8 is fixed at the bottom end of the filter mechanism 7 and abuts against the annular water guide chamber 6. The heat dissipation mechanism 9 is located below the annular water guide chamber 6 and is movably sleeved with the main shaft 3. The main shaft 3 has a flow guide cavity 31 inside. The heat dissipation mechanism 9 connects the flow guide cavity 31 with the annular water guide cavity.

[0034] The top side of the grinding chamber 2 is connected to the feed pipe 14, which communicates with the feeding area 11. The drive device 4 is installed on the top of the sand mill and is connected to the main shaft 3 through a coupling. The main shaft 3 extends vertically downward into the grinding chamber and drives the grinding disc 5 to rotate at high speed. During the grinding process, the material enters the grinding chamber 2 from the feed pipe 14. After entering the grinding chamber 2, the material passes through the feeding area 11, the grinding area 12 and the unloading area 13 in sequence. When the material falls into the feeding area 11, it is first filtered by the filtering mechanism 7. The filtering mechanism 7 includes a filter bucket 71, which is inverted and sleeved on the main shaft 3 and fixedly connected to the main shaft 3.

[0035] The bottom outer diameter of the filter bucket 71 is equal to the inner diameter of the annular water guiding chamber 6, and the bottom of the filter bucket 71 extends into the interior of the annular water guiding chamber 6.

[0036] Multiple filter holes are evenly distributed on the filter hopper 71. The size of these filter holes can be customized according to the particle size requirements of the actual material to be ground. When the material falls into the filter hopper 71, the fine material that meets the particle size requirements will pass through the filter holes and enter the grinding zone 12, while the larger material will be intercepted on the upper surface of the filter hopper 71. The material entering the grinding zone 12 is ground by multiple sets of grinding discs 5. The grinding discs 5 rotate at high speed with the main shaft 3, generating strong friction and shearing force with the material, so that the material is gradually ground into finer particles, thereby achieving fine grinding of the material.

[0037] During the grinding process, the cooling water in the annular water guide chamber 6 circulates continuously, carrying away the heat generated during grinding and preventing the temperature inside the grinding chamber 2 from becoming too high, which would affect the grinding effect and the lifespan of the equipment. The cleaning mechanism 8 rotates with the rotation of the main shaft 3, and it comes into contact with the inner wall of the annular water guide chamber 6, which can promptly clean the material residue attached to the inner wall of the annular water guide chamber 6, ensuring the heat conduction effect of the annular water guide chamber 6. In addition, by setting up a heat dissipation mechanism 9, the cold water inside the annular water guide chamber is introduced into the guide cavity 31 inside the main shaft 3. Through the special guide channel inside the main shaft 3, the cooling water can come into closer contact with the heat source generated during the grinding process, further enhancing the cooling effect. The fully ground material will enter the feeding area 13 and be discharged from the bottom of the feeding area 13, thus completing the entire grinding process.

[0038] It is worth noting that the rotation of the main shaft 3 drives the filter hopper 71 to rotate as well. Therefore, when the main shaft 3 drives the filter hopper 71 to rotate, the material on the filter hopper 71 will be more evenly distributed on its surface under the action of centrifugal force. This rotation method not only helps improve filtration efficiency but also prevents localized accumulation of material on the filter hopper 71, which could lead to clogging of the filter holes. Simultaneously, since the filter hopper 71 is fixedly connected to the main shaft 3, its rotational stability is ensured, preventing shaking or shifting due to uneven material distribution, thus ensuring the stability and reliability of the entire grinding process. Furthermore, the rotation of the filter hopper 71 also promotes the relative movement between the material and the filter holes, allowing fine materials that meet the particle size requirements to pass through the filter holes more smoothly into the grinding zone 12, further improving grinding efficiency.

[0039] Furthermore, a coarse material discharge pipe 15 is connected to the lower side of the outer wall of the grinding chamber 2 away from the feed pipe 14. One end of the coarse material discharge pipe 15 is connected to the surface of the annular water guide chamber 6 and faces the outside of the filter bucket 71.

[0040] During the grinding process, some larger particles, unable to pass through the filter holes in the filter hopper 71, gradually move to the coarse material discharge pipe 15 as the filter hopper 71 rotates. They are then discharged from the grinding chamber 2 through the coarse material discharge pipe 15. This allows the coarse material to be separated from the grinding system in a timely manner, preventing it from remaining in the grinding chamber 2 for extended periods and affecting the overall grinding effect. It also ensures that the particle size of the material entering the grinding zone 12 is relatively uniform, which is beneficial for improving the quality of the final product. A valve can be installed on the coarse material discharge pipe 15, and the passage of the coarse material discharge pipe 15 can be closed when material falls into the filter hopper 71 to prevent insufficiently ground material from being discharged directly from the coarse material discharge pipe 15, ensuring that all material is fully ground in the grinding chamber 2. When a certain amount of coarse material accumulates in the filter hopper 71, the valve can be opened to allow the coarse material to be discharged intermittently.

[0041] The annular water guiding chamber 6 includes an annular cylinder 61, two annular plates 62, two baffles 63, and two sets of arc-shaped inclined plates 64. The two annular plates 62 are arranged sequentially from top to bottom. The annular cylinder 61 is fixedly connected to the inner side of the two annular plates 62, and the upper and lower ends of the annular cylinder 61 are flush with the upper and lower surfaces of the two annular plates 62, respectively. A gap 65 is formed between the outer wall of the annular cylinder 61 and the inner wall of the grinding chamber 2. The two baffles 63 are arranged vertically and symmetrically on both sides inside the gap 65, dividing the gap 65 into a first water guiding cavity 66 and a second water guiding cavity 67 that are interconnected. Cold water inlet pipes 68 and cold water outlet pipes 69 are respectively arranged on both sides of the grinding chamber 2, which are connected to the first water guiding cavity 66 and the second water guiding cavity 67. The two sets of arc-shaped inclined plates 64 are evenly arranged along the length direction of the baffles 63, and each set of arc-shaped inclined plates 64 has staggered drain outlets 70.

[0042] The heat dissipation mechanism 9 includes a base plate 91, a sealing pipe 92, and two water guide pipes 93. The base plate 91 is horizontally set inside the grinding chamber 2 and located in the feeding area 13. The sealing pipe 92 is fixed at the top axis of the base plate 91 and extends into the flow guide cavity 31 and is rotatably connected to the main shaft 3. A partition plate 94 is vertically fixed inside the flow guide cavity 31, which divides the flow guide cavity 31 into two parts. The two water guide pipes 93 are symmetrically fixed at the bottom of the base plate 91, and one end of the two water guide pipes 93 passes through the base plate 91 and extends into the sealing pipe 92. The other end of the two water guide pipes 93 passes through the base plate 91, the feeding area 13, and the annular water guide chamber 6 in sequence and is connected to the first water guide cavity 66 and the second water guide cavity 67 respectively.

[0043] The annular cylinder 61 and the two annular plates 62 together form the main frame of the annular water guiding chamber 6. This structure not only ensures the stability of the annular water guiding chamber 6, but also provides ample space for the internal cooling water circulation. The two baffles 63 divide the gap 65 between the annular water guiding chamber 6 and the inner wall of the grinding chamber 2 into a first water guiding cavity 66 and a second water guiding cavity 67, allowing cooling water to flow in and out in an orderly manner. The cold water inlet pipe 68 and the cold water outlet pipe 69 are connected to the first water guiding cavity 66 and the second water guiding cavity 67, respectively, so that they, together with the heat dissipation mechanism 9, form a complete cooling water circulation system. Through the cooperation of the annular water guide chamber 6 and the heat dissipation mechanism 9, cold water enters the first water guide chamber 66 through the cold water inlet pipe 68. When the cooling water flows into the first water guide chamber 66 from the cold water inlet pipe 68, it flows along the length of the first arc-shaped inclined plate 64 and flows through the drain outlet 70 on the arc-shaped inclined plate 64 to the next level arc-shaped inclined plate 64. At this time, since the drains on different arc-shaped inclined plates 64 are staggered, when the cold water flows to the next level arc-shaped inclined plate 64, the cold water spreads along the inclination direction of the arc-shaped inclined plate 64 until it flows to the drain outlet 70 on the arc-shaped inclined plate 64 and flows to the next level arc-shaped inclined plate 64. This cycle repeats until the cold water enters the water guide pipe 93 connected to it and enters the guide chamber 31 through the water guide pipe 93.

[0044] Within the guide cavity 31, the partition plate 94 divides the cavity into two, forming an inverted U-shaped channel. As the cold water flows through this channel, it effectively exchanges heat with the inner wall of the guide cavity 31, carrying away the heat generated during the grinding process. Furthermore, the partition plate 94 further slows the flow of the cold water upon entering the guide cavity 31, extending the heat exchange time with the grinding chamber 2 and improving heat dissipation efficiency. Subsequently, the cooling water flows out of the guide cavity 31 and enters the second guide cavity 67 through another water pipe 93. Once in the second guide cavity 67, the cooling water continues to flow along the length of the second arc-shaped inclined plate 64. Within the second guide cavity 67, the cooling water follows a staggered upward path, flowing upwards through the drain outlets 70 on each arc-shaped inclined plate 64. During this process, the cooling water continuously absorbs heat from the grinding chamber 2, and its temperature gradually increases. When the cooling water flows to the top of the second water guide chamber 67, the hot water, having fully absorbed heat, flows out of the annular water guide chamber 6 through the cold water discharge pipe 69. A cooling system is connected to the cold water discharge pipe 69 to cool the discharged water before it is reconnected to the cold water inlet pipe 68, thus forming a complete and efficient cooling water circulation system. This system not only ensures temperature control of the vertical sand mill during the grinding process but also greatly improves the service life and grinding efficiency of the equipment.

[0045] The combination of the annular water guide chamber and the two water guide pipes 93 creates a stable and orderly flow path for the cooling water within the main shaft 3 and the grinding chamber 2. This flow path ensures that the cooling water can comprehensively and continuously absorb the heat generated during the grinding process, effectively preventing localized overheating. Simultaneously, the annular water guide chamber design allows for thorough heat exchange between the cooling water and the outer walls of the main shaft 3 and the grinding chamber 2, further improving heat dissipation. Furthermore, the two water guide pipes 93 serve as the inlet and outlet for the cooling water in the first water guide chamber 66 and the second water guide chamber 67, respectively, working closely with the annular water guide chamber 6 to form a highly efficient cooling water circulation channel, providing a reliable guarantee for the stable operation of the vertical sand mill. This combination not only solves the problem of internal heat accumulation during high-speed mixing in traditional sand mills but also significantly improves the temperature control capability and grinding efficiency of the grinding chamber 2 by forming a complete and efficient cooling water circulation system, providing strong support for stable material grinding and product quality.

[0046] The design of the arc-shaped inclined plate 64 not only increases the flow path of cooling water within the annular water guide chamber 6, improving the cooling effect, but also achieves uniform distribution of cooling water through the drain port 70, preventing localized overheating. This structure allows the annular water guide chamber 6 to more efficiently remove the heat generated during the grinding process, ensuring the stability and reliability of the grinding process.

[0047] Furthermore, the material feeding area 13 is equipped with a funnel-shaped shaking bag 95, the bottom of the grinding chamber 2 is provided with a through hole 96, a fan is installed inside the through hole 96, and the bottom of the base plate 91 is provided with connecting ports 98 on both sides.

[0048] A fan is installed at the through-hole 96. By starting the fan, external cold air is delivered to the bottom of the base plate 91. The cold air then enters the material feeding area 13 through the two connecting ports 98 and is located outside the shaking bag 95. Since the cooling water inside the first water guiding chamber 66 continuously absorbs the heat transferred from the grinding chamber 2, the temperature of the cooling water discharged from the first water guiding chamber 66 has already increased. Therefore, when the cooling water passes through the water guiding pipe 93, the temperature of the external cold air is lower than the temperature of the cooling water inside the water guiding pipe 93. Thus, when the high-temperature cooling water passes through the water guiding pipe 93, it forms a strong heat exchange with the external cold air, which not only effectively reduces the temperature of the cooling water but also prevents the transfer of heat to subsequent cooling stages. Preferably, the outer wall of the water guiding pipe 93 is made of a metal material with excellent thermal conductivity, which further accelerates the heat exchange process and ensures that the cooling water reaches the ideal temperature in a short time. This heat dissipation method combining air cooling and water cooling not only greatly improves the overall heat dissipation efficiency of the grinding chamber 2 but also enables the equipment to maintain stable performance output under long-term high-load operation. This extends the service life of the vertical sand mill and reduces maintenance costs. Simultaneously, due to the significantly improved heat dissipation, the material temperature during the grinding process is better controlled, thus ensuring the quality and consistency of the ground products and meeting the demands of high-precision machining.

[0049] Furthermore, when external cold air blows towards the shaking bag 95, it causes the bag to shake. This shaking helps to further dislodge material adhering to the inner wall of the bag, preventing material accumulation and ensuring smooth feeding. This further optimizes the feeding process; its funnel-shaped structure facilitates material concentration and smooth discharge, reducing material residue in the grinding chamber 2 and improving grinding efficiency. Simultaneously, the cold air surrounding the shaking bag 95 also cools the material inside, helping to maintain stable material temperature and preventing changes in material properties due to heat generated during grinding. The funnel-shaped design of the shaking bag 95 not only facilitates material concentration and discharge but also increases the contact area between cold air and material, improving cooling efficiency. The connecting openings 98 on both sides of the bottom of the base plate 91 ensure that cold air can smoothly enter the feeding area 13 and fully exchange heat with the water pipe 93 and the shaking bag 95. In addition, to ensure air circulation, an air vent can be opened on the side wall of the grinding chamber 2 to allow cold air inside the feeding area 13 to be discharged. The setting of the fan and air vent is a conventional operation in the prior art, so it is not shown in the figure, and its working principle will not be described in detail.

[0050] The two baffles 63 and the partition plate 94 are located on the same vertical line, and the upper and lower ends of the two baffles 63 are fixedly connected to the two annular plates 62 respectively.

[0051] The partition plate 94 and the two baffles 63 are aligned vertically, which helps to form a stable cold water flow channel, ensuring that the cold water flows along a predetermined path, reducing turbulence and energy loss, thereby improving the overall efficiency of the cooling system and guaranteeing the continuity of the cooling effect. The two baffles 63, through their fixed connection with the annular plate 62, not only enhance the stability of the structure but also provide necessary support for the cold water flow channel, ensuring the reliability and durability of the equipment during long-term operation.

[0052] The cleaning mechanism 8 includes two fixing rings 81 and two scrapers 82. The two fixing rings 81 are arranged sequentially from top to bottom in the grinding zone 12. One fixing ring 81 is fixedly connected to the bottom of the filter bucket 71. The two scrapers 82 are symmetrically fixed to the bottom of the fixing ring 81. The other fixing ring 81 is fixedly connected to the bottom of the two scrapers 82. The outer diameter of the two fixing rings 81 is equal to the inner diameter of the annular water guide chamber 6, and the outer wall of the two scrapers 82 abuts against the inner wall of the annular water guide chamber 6.

[0053] The cleaning mechanism 8 effectively cleans the inner wall of the annular water guide chamber 6. When the vertical sand mill is working, as the material grinds and flows, some material may adhere to the inner wall of the annular water guide chamber 6. When the main shaft 3 rotates, it drives the filter bucket 71 to rotate, which in turn drives the fixed ring 81 fixed to it to rotate, so that the two scrapers 82 can rotate and scrape the inner wall of the annular water guide chamber 6 to clean off the adhered material, ensuring the cleanliness of the inner wall of the annular water guide chamber 6 and avoiding the impact of material adhesion on the normal operation of the equipment and the grinding effect.

[0054] The bottom of the base plate 91 is connected to an L-shaped discharge pipe 16 that communicates with the inside of the shaking bag 95. The other end of the L-shaped discharge pipe 16 passes through the grinding chamber 2 and extends to the outside of the grinding chamber 2. The ground material is discharged through the L-shaped discharge pipe 16.

[0055] The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A vertical sand mill comprising a device body (1), a grinding chamber (2), a main shaft (3) and a driving device (4) for driving the main shaft (3) to rotate, the grinding chamber (2) is installed on one side of the device body (1), the main shaft (3) is rotatably arranged inside the grinding chamber (2), the driving device (4) is installed on one side of the top of the device body (1), and the output shaft of the driving device (4) is coaxially connected with the main shaft (3), characterized in that, The main shaft (3) is externally and evenly provided with a plurality of groups of sanding discs (5) along the length direction, the inner wall of the grinding bin (2) is provided with an annular water guide bin (6) for cooling the interior of the grinding bin (2), the annular water guide bin (6) divides the interior of the grinding bin (2) into a feeding area (11), a grinding area (12) and a discharging area (13), the feeding area (11) is provided with a filtering mechanism (7) for filtering materials, the grinding area (12) is provided with a cleaning mechanism (8) for cleaning the inner wall of the annular water guide bin (6), the discharging area (13) is provided with a heat dissipation mechanism (9), the filtering mechanism (7) is fixedly sleeved on the outer portion of the main shaft (3) and located above the annular water guide bin (6), the cleaning mechanism (8) is fixed to the bottom end of the filtering mechanism (7) and abuts against the annular water guide bin (6), the heat dissipation mechanism (9) is located below the annular water guide bin (6) and movably sleeved on the main shaft (3), the main shaft (3) is internally provided with a flow guide cavity (31), and the heat dissipation mechanism (9) communicates the flow guide cavity (31) with the annular water guide bin (6); The annular water guide bin (6) comprises an annular cylinder (61), two annular plates (62), two baffles (63) and two groups of arc-shaped inclined plates (64), the two annular plates (62) are sequentially arranged from top to bottom, the annular cylinder (61) is fixedly connected to the inner sides of the two annular plates (62), and the upper and lower ends of the annular cylinder (61) are flush with the upper surface and the lower surface of the two annular plates (62), respectively, the outer wall of the annular cylinder (61) and the inner wall of the grinding bin (2) form a gap (65), the two baffles (63) are vertically and symmetrically arranged inside the gap (65) on both sides and divide the gap (65) into a first water guide cavity (66) and a second water guide cavity (67) in communication with each other, the grinding bin (2) is provided with a cold water inlet pipe (68) and a cold water outlet pipe (69) in communication with the first water guide cavity (66) and the second water guide cavity (67) on both sides, respectively, and the two groups of arc-shaped inclined plates (64) are evenly arranged along the length direction of the baffle (63), and the arc-shaped inclined plates (64) of each group are staggered and provided with a water outlet (70) on each. The heat dissipation mechanism (9) comprises a bottom plate (91), a blocking pipe (92) and two water guide pipes (93), the bottom plate (91) is horizontally arranged inside the grinding bin (2) and located in the discharging area (13), the blocking pipe (92) is fixed at the top axis of the bottom plate (91), the blocking pipe (92) extends into the flow guide cavity (31) and is sealingly connected with the main shaft (3), the flow guide cavity (31) is vertically fixed with a partition plate (94) inside, the partition plate (94) divides the flow guide cavity (31) into two parts, the two water guide pipes (93) are symmetrically fixed at the bottom of the bottom plate (91), one end of the two water guide pipes (93) extends into the blocking pipe (92) through the bottom plate (91), and the other end of the two water guide pipes (93) sequentially passes through the bottom plate (91), the discharging area (13) and the annular water guide bin (6) and is in communication with the first water guide cavity (66) and the second water guide cavity (67) respectively.

2. A vertical sand mill according to claim 1, characterized in that: A funnel-shaped shaking bag (95) is arranged in the discharging area (13), a through hole (96) is formed in the bottom of the grinding bin (2), a fan is arranged in the through hole (96), and a communication port (98) is formed in the bottom of the bottom plate (91).

3. A vertical sand mill according to claim 2, characterized in that: The two baffles (63) are located on the same vertical line as the partition plate (94), and the upper and lower ends of the two baffles (63) are fixedly connected with the two annular plates (62) respectively.

4. A vertical sand mill according to claim 1, characterized in that: The filtering mechanism (7) comprises a filter hopper (71), the filter hopper (71) is arranged in an inverted manner on the main shaft (3) and is fixedly connected with the main shaft (3).

5. A vertical sand mill according to claim 4, characterized in that: The outer diameter of the bottom of the filter hopper (71) is equal to the inner diameter of the annular water guide bin (6), and the bottom of the filter hopper (71) extends into the annular water guide bin (6).

6. A vertical sand mill according to claim 1, characterized in that: A feeding pipe (14) in communication with the feeding area (11) is connected to one side of the top of the grinding bin (2), a coarse material discharge pipe (15) is connected to the side of the outer wall of the grinding bin (2) away from the feeding pipe (14) and below, one end of the coarse material discharge pipe (15) is connected with the surface of the annular water guide bin (6) and faces the outside of the filter hopper (71).

7. A vertical sand mill according to claim 1, characterized in that: The cleaning mechanism (8) comprises two fixed rings (81) and two scrapers (82), the two fixed rings (81) are sequentially arranged in the grinding area (12) from top to bottom, one of the fixed rings (81) is fixedly connected with the bottom of the filter hopper (71), the two scrapers (82) are symmetrically fixed to the bottom of the fixed ring (81), the other fixed ring (81) is fixedly connected with the bottom ends of the two scrapers (82), the outer diameters of the two fixed rings (81) are equal to the inner diameter of the annular water guide bin (6), and the outer walls of the two scrapers (82) abut against the inner wall of the annular water guide bin (6).

8. A vertical sand mill according to claim 2, characterized in that: An L-shaped discharge pipe (16) in communication with the inside of the shaking bag (95) is connected to the bottom of the bottom plate (91), and the other end of the L-shaped discharge pipe (16) penetrates through the grinding bin (2) and extends to the outside of the grinding bin (2).

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