Small vertical sand mill

Abstract

The utility model relates to the technical field of sand mills, in particular to a small vertical sand mill which comprises a machine body, a grinding mechanism and a grinding driving mechanism installed in the machine body, the grinding mechanism sequentially comprises a first sealing ring, a static grinding inner barrel, a second sealing ring and a cooling barrel from top to bottom, and a plurality of static grinding parts are arranged on the inner wall of the static grinding inner barrel in a surrounding mode. One side of the cooling barrel extends outwards to form a drainage pipeline and a water inlet pipeline, a drainage head is installed at one end of the drainage pipeline, a water inlet head is installed at one end of the water inlet pipeline, and the end, away from the water inlet head, of the drainage pipeline communicates with the interior of the cooling barrel. And the machine body is C-shaped, so that the whole structure of the equipment is compact, and compared with a traditional sand mill, the occupied space in the horizontal direction is greatly reduced. Due to the fact that the whole device is miniaturized, the grinding driving mechanism, the grinding mechanism and other parts in the device are correspondingly shrunk, the shrunk grinding mechanism is small in internal dissolved volume, and the device is suitable for scientific research experiments and formula debugging of small-batch materials.

Description

Technical Field

[0001] This utility model relates to the field of sand mills, specifically to a small vertical sand mill. Background Technology

[0002] With the development of fields such as nanomaterials, catalysts, electronic ceramics, and biomedicine, laboratories are increasingly demanding higher precision (e.g., micron- and nanometer-level particle size control), uniformity, and repeatability in material grinding. Traditional large-scale grinding equipment (such as ball mills and drum mills) is difficult to meet the needs of small-batch, high-precision experiments due to its large size, high energy consumption, and low grinding efficiency.

[0003] Miniaturized grinding equipment needs to achieve efficient grinding within a limited space, while also being easy to operate, easy to clean, and adjustable in parameters, in order to meet the grinding needs of laboratories for different materials (such as brittle, soft, and sticky materials).

[0004] Chinese Patent Publication No. CN 105996823 A discloses a grinding machine, including a base, a grinding cup, and a cup lid. The grinding cup is installed on the top of the base, and the cup lid covers the upper opening of the grinding cup. A grinding motor is installed inside the base, and a feeding hopper is installed inside the grinding cup. A grinding assembly is installed at the bottom of the feeding hopper. The grinding assembly includes a stationary grinding head and a moving grinding head that cooperate with each other. The stationary grinding head is fixed on the feeding hopper, and the moving grinding head is arranged in the hollow cavity of the stationary grinding head and is fixedly connected to the output shaft of the grinding motor. A fixed baffle is provided above the grinding assembly in the feeding hopper. Part of the side of the fixed baffle is connected to the side wall of the feeding hopper, and the other part of the side of the fixed baffle and the side wall of the feeding hopper form a discharge port. A rotatable movable baffle is provided at the discharge port. The movable baffle is attached to the fixed baffle, and the rotation of the movable baffle intermittently opens or closes the discharge port. A cavity for preventing material blockage is formed between the lower part of the movable baffle and the moving grinding head. This invention avoids material blockage and ensures grinding efficiency and effect, but the grinding machine still has the following problems: the grinding machine has a complex structure, and the equipment is not easy to disassemble and install after use, and it is inconvenient to clean. Therefore, it is time-consuming and labor-intensive, and it is not conducive to saving manpower and resources. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned defects and provide a small vertical sand mill. Its miniaturized design can reduce the floor space required for small-scale grinding. After grinding, the cooling tank can be disassembled to empty the mill, which facilitates the disassembly or replacement of parts. Small-scale grinding is suitable for sampling in experimental research.

[0006] The purpose of this utility model is achieved through the following means: a small vertical sand mill, including a body, a grinding mechanism and a grinding drive mechanism installed in the body, the body is C-shaped, the grinding mechanism is located below the grinding drive mechanism, and a locking and disassembly mechanism is fitted between the grinding drive mechanism and the grinding mechanism.

[0007] The grinding mechanism comprises, from top to bottom, a first sealing ring, a static grinding inner barrel, a second sealing ring, and a cooling barrel. The tops of both the static grinding inner barrel and the cooling barrel are annularly arranged. The outer edge of the top of the static grinding inner barrel extends from the inside out, and the inner edge of the top of the cooling barrel extends from the outside in. The static grinding inner barrel is fixedly mounted on the cooling barrel. Several static grinding sections are arranged around the inner wall of the static grinding inner barrel, with a consistent spacing between adjacent static grinding sections. A drain pipe and a water inlet pipe extend outward from one side of the cooling barrel. A drain head is installed at one end of the drain pipe, and the end of the drain pipe away from the drain head extends into the interior of the cooling barrel. A water inlet head is installed at one end of the water inlet pipe, and the end of the drain pipe away from the water inlet head connects to the interior of the cooling barrel.

[0008] Furthermore, the grinding drive mechanism, from top to bottom, includes a drive motor, a drive shaft, a limiting seat, a third sealing ring, a limiting disc, a moving grinding head, and a positioning rod. The moving grinding head is mounted on the positioning rod. The drive shaft has a mating part at one end near the moving grinding head that cooperates with the moving grinding head. The limiting disc and the limiting seat are both mounted on the drive shaft, and the tail end of the positioning rod is fixedly mounted on the drive shaft. The drive motor provides power, and the drive shaft drives the moving grinding head to rotate at high speed through the mating part, preventing axial displacement during rotation.

[0009] Furthermore, the limiting seat extends inwardly on the side near the limiting plate to form a limiting groove for mounting the limiting plate. The limiting plate, on the side near the limiting seat, has a first mounting groove for mounting the third sealing ring. The outer surface of the moving grinding head is surrounded by several moving grinding sections that mate with the stationary grinding section, with consistent spacing between adjacent moving grinding sections. The moving grinding sections and the stationary grinding sections form staggered grinding gaps, generating shear force through relative rotation to efficiently crush and refine the material; the equidistant spacing design ensures uniform force on the material during grinding.

[0010] Furthermore, the locking and disassembly mechanism includes, from left to right, a first fastening member, a first movable column, a second fastening member, a second movable column, and a locking member. The first fastening member and the second fastening member are hinged to each other via the first movable column. The end of the first fastening member away from the first movable column has a first locking groove, and the end of the second fastening member away from the first movable column has a second locking groove. One end of the locking member is movably mounted on the second locking groove via the second movable column, and the locking member can be fastened to the first locking groove. The first fastening member is fixedly mounted on the limiting seat. Both the first and second fastening members have fastening grooves on their inner walls that cooperate with the limiting seat and the cooling tank. The first and second fastening members open and close via the movable column. After the locking member is fastened, it can fix the limiting seat and the cooling tank. Disassembly only requires loosening the locking member, and disassembly and assembly can be completed without tools, making the operation convenient.

[0011] Furthermore, the static grinding inner barrel is fixedly mounted on the cooling barrel by a first screw, and the limiting plate is fixedly mounted on the limiting groove by a second screw.

[0012] Furthermore, the drive motor is installed inside the machine body, and the limiting seat is installed outside the machine body. The drive motor is connected to the limiting seat via a third screw. Fixing the limiting seat and drive motor with a third screw results in a simple structure, convenient assembly and disassembly, and ensures that all components maintain a rigid connection during grinding, preventing displacement due to vibration. The screw provides precise positioning, facilitating component repositioning during maintenance and ensuring consistent grinding gaps.

[0013] Furthermore, the top of the static grinding inner barrel, near the inner ring, is provided with a second mounting groove for installing the first sealing ring. By providing precise positioning for the sealing ring through the second mounting groove, the first sealing ring is ensured to fit tightly against the surface of the limiting disc, enhancing the sealing effect, preventing leakage of grinding materials or liquids, and protecting the structure from corrosion or contamination.

[0014] Furthermore, a third mounting groove for installing the second sealing ring is provided around the top end of the cooling tank near the inner ring. By providing precise positioning for the sealing ring through the third mounting groove, a tight fit between the second sealing ring and the static inner tank is ensured, enhancing the sealing effect, preventing water leakage, and guaranteeing the cooling effect.

[0015] Furthermore, the end of the drain pipe furthest from the cooling tank is provided with a first external thread that mates with the drain head, and the end of the water inlet pipe furthest from the cooling tank is provided with a second external thread that mates with the water inlet head. The threaded connection facilitates the installation and disassembly of the water inlet and drain pipes with the water inlet and drain heads, making maintenance or replacement convenient; the threaded connection provides good sealing performance, preventing water leakage and ensuring the stability of the cooling or cleaning process.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. The C-shaped design of the machine body makes the overall structure compact, significantly reducing the horizontal space occupied compared to traditional sand mills. Furthermore, the lighter weight makes the equipment easier to move and transport, improving its operational flexibility.

[0018] 2. The locking and disassembly mechanism between the grinding drive mechanism and the grinding mechanism allows for the separation of these two core components without the need for complex tools, enabling operators to perform disassembly. When the equipment malfunctions, or when components in the grinding mechanism show wear and require replacement, they can be disassembled for repair or replacement. The first sealing ring, static grinding inner barrel, second sealing ring, and cooling barrel in each component of the grinding mechanism are removable, allowing for thorough cleaning of the equipment's interior. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a small vertical sand mill according to the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the grinding mechanism in a small vertical sand mill according to the present invention;

[0021] Figure 3 This is an exploded three-dimensional view of the grinding mechanism in a small vertical sand mill according to the present invention.

[0022] Figure 4 This is an exploded three-dimensional view of the grinding drive mechanism in a small vertical sand mill according to this utility model.

[0023] Figure 5 This is an exploded three-dimensional view of the grinding drive mechanism in a small vertical sand mill according to this utility model.

[0024] Figure 6 This is a three-dimensional structural diagram of the locking and disassembly mechanism in a small vertical sand mill according to the present invention;

[0025] Figure 7 This is a right view of a small vertical sand mill according to the present invention;

[0026] Figure 8 This utility model Figure 7 Sectional view of AA;

[0027] Figure 9 This utility model Figure 8 A magnified view of part B in the diagram;

[0028] Figure 10 This is a rear view of a small vertical sand mill according to the present invention;

[0029] Figure 11 This utility model Figure 10 Sectional view of CC;

[0030] Figure 12 This utility model Figure 11 A magnified view of part of D.

[0031] In the diagram, 1. Machine body; 101. Switch; 102. Display; 2. Grinding mechanism; 201. First sealing ring; 202. Static grinding inner barrel; 203. Second sealing ring; 204. Cooling barrel; 205. Static grinding section; 206. Drainage pipe; 207. Water inlet pipe; 208. Drain head; 209. Water inlet head; 3. Grinding drive mechanism; 301. Drive motor; 302. Drive shaft; 303. Limit seat; 304. Third sealing ring; 305. Limit plate; 306. Moving grinding head; 307. 1. Positioning rod; 308. Moving grinding part; 4. Locking and disassembly mechanism; 401. First fastening part; 402. First movable column; 403. Second fastening part; 404. Second movable column; 405. Locking part; 5. Mating part; 6. Limiting groove; 7. First mounting groove; 8. First locking groove; 9. Second locking groove; 10. Fastening groove; 11. First screw; 12. Second screw; 13. Third screw; 14. Second mounting groove; 15. Third mounting groove; 16. First external thread; 17. Second external thread. Detailed Implementation

[0032] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0033] Please see Figure 1-12 The specific implementation of the small vertical sand mill includes a body 1, a grinding mechanism 2 and a grinding drive mechanism 3 installed in the body 1. The body 1 is C-shaped, the grinding mechanism 2 is located below the grinding drive mechanism 3, and a locking and disassembly mechanism 4 is installed between the grinding drive mechanism 3 and the grinding mechanism 2.

[0034] Please see Figure 2-3The grinding mechanism 2 includes, from top to bottom, a first sealing ring 201, a static grinding inner barrel 202, a second sealing ring 203, and a cooling barrel 204. The tops of both the static grinding inner barrel 202 and the cooling barrel 204 are annularly arranged. The outer edge of the top of the static grinding inner barrel 202 extends from the inside to the outside, and the inner edge of the top of the cooling barrel 204 extends from the outside to the inside. The static grinding inner barrel 202 is fixedly installed on the cooling barrel 204. Several static grinding sections 205 are arranged around the inner wall of the static grinding inner barrel 202. The spacing between two adjacent static grinding sections 205 is the same. A drain pipe 206 and a water inlet pipe 207 extend outward from one side of the cooling barrel 204. A drain head 208 is installed at one end of the drain pipe 206, and the end of the drain pipe 206 away from the drain head 208 extends into the interior of the cooling barrel 204. A water inlet head 209 is installed at one end of the water inlet pipe 207, and the end of the drain pipe 206 away from the water inlet head 209 connects to the interior of the cooling barrel 204.

[0035] Please see Figure 2-3 The top of the static grinding inner barrel 202, near the inner ring, is provided with a second mounting groove 14 for installing the first sealing ring 201. The second mounting groove 14 provides precise positioning for the sealing ring, ensuring a tight fit between the first sealing ring 201 and the surface of the limiting disc 305, achieving a sealing effect, preventing leakage of grinding materials or liquids, and protecting the structure from corrosion or contamination. The top of the cooling barrel 204, near the inner ring, is provided with a third mounting groove 15 for installing the second sealing ring 203. The third mounting groove 15 provides precise positioning for the sealing ring, ensuring a tight fit between the second sealing ring 203 and the static grinding inner barrel 202, achieving a sealing effect, preventing water leakage, and ensuring cooling performance. The drain pipe 206, away from the cooling barrel 204, has a first external thread 16 that mates with the drain head 208, and the water inlet pipe 207, away from the cooling barrel 204, has a second external thread 17 that mates with the water inlet head 209. The threaded connection facilitates the installation and disassembly of the water inlet and outlet pipes 206 and the water inlet and outlet heads 208, making maintenance or replacement convenient; the threaded connection provides good sealing performance and prevents water leakage.

[0036] Please see Figure 4-5The grinding drive mechanism 3, from top to bottom, includes a drive motor 301, a drive shaft 302, a limiting seat 303, a third sealing ring 304, a limiting plate 305, a moving grinding head 306, and a positioning rod 307. The moving grinding head 306 is mounted on the positioning rod 307. The drive shaft 302 has a mating part 5 near the moving grinding head 306 for installation with the moving grinding head 306. The limiting plate 305 and the limiting seat 303 are both mounted on the drive shaft 302. The tail of the positioning rod 307 is fixedly mounted on the drive shaft 302. The drive motor 301 provides power, directly driving the moving grinding head 306 to rotate at high speed via the drive shaft 302. The cooperation between the drive shaft 302 and the positioning rod 307 ensures the moving grinding head 306 is securely installed, preventing axial displacement during rotation. The limiting seat 303 extends inward on the side near the limiting plate 305, with a limiting groove 6 for mounting the limiting plate 305. The limiting plate 305 has a first mounting groove 7 on the side near the limiting seat 303 for mounting the third sealing ring 304. The outer surface of the moving grinding head 306 is surrounded by several moving grinding parts 308 that cooperate with the stationary grinding part 205, and the spacing between adjacent moving grinding parts 308 is consistent. The moving grinding parts 308 and the stationary grinding part 205 form staggered grinding gaps, and the relative rotation generates shearing force to efficiently crush and refine the material. The equal spacing design ensures that the material is subjected to uniform force during the grinding process, improving grinding efficiency and finished product quality, while reducing the wear deviation of the moving grinding head 306.

[0037] Please see Figure 6 The locking and unlocking mechanism 4 includes, from left to right, a first fastening member 401, a first movable post 402, a second fastening member 403, a second movable post 404, and a locking member 405. The first fastening member 401 and the second fastening member 403 are hinged to each other through the first movable post 402. The end of the first fastening member 401 away from the first movable post 402 is provided with a first locking groove 8. The end of the second fastening member 403 away from the first movable post 402 is provided with a second locking groove 9. One end of the locking member 405 is movably mounted on the second locking groove 9 through the second movable post 404. The locking member 405 can be fastened to the first locking groove 8. The first fastening member 401 is fixedly mounted on the limiting seat 303. The inner walls of the first fastening member 401 and the second fastening member 403 are both provided with fastening grooves 10 that cooperate with the limiting seat 303 and the cooling tank 204. The first and second fastening parts 403 are opened and closed by the movable column. After the locking part 405 is fastened, it can fix the limit seat 303 to the cooling tank 204. When disassembling, simply loosen the locking part 405. Disassembly and assembly can be completed without tools, making the operation convenient.

[0038] Please see Figure 3-5The inner grinding barrel 202 is fixedly mounted on the cooling barrel 204 by the first screw 11, and the limiting plate 305 is fixedly mounted on the limiting groove 6 by the second screw 12. The drive motor 301 is installed inside the machine body 1, and the limiting seat 303 is installed outside the machine body 1. The drive motor 301 is connected to the limiting seat 303 by the third screw 13. By setting the third screw 13 to fix the limiting seat 303 and the drive motor 301, the structure is simple and easy to disassemble and assemble. It can ensure that each component maintains a rigid connection during the grinding process and avoid displacement due to vibration. The screw positioning is precise, which facilitates the repositioning of components during maintenance and ensures the consistency of the grinding gap.

[0039] The working principle of this utility model embodiment is as follows:

[0040] I. Preparation Phase: Installation and Material Filling

[0041] When the work begins, the upper limit seat 303 of the grinding drive mechanism 3 and the cooling tank 204 on the grinding mechanism 2 are fastened and fixed by the first fastening part 401, the second fastening part 403 and the locking part 405 on the locking and disassembly mechanism 4, so as to ensure that the fastening groove 10 fits tightly and prevents it from loosening during the work.

[0042] Check that each sealing ring (first, second, and third sealing rings 304) is installed correctly: the first sealing ring 201 is embedded in the second mounting groove 14 at the top of the static grinding inner barrel 202, sealing with the surface of the limiting plate 305 to prevent grinding material from leaking into the drive mechanism; the second sealing ring 203 is embedded in the third mounting groove 15 at the top of the cooling barrel 204, sealing with the bottom of the static grinding inner barrel 202 to prevent cooling water from seeping into the grinding area; the third sealing ring 304 is installed in the first mounting groove 7 of the limiting plate 305, cooperating with the limiting groove 6 of the limiting seat 303 to enhance the sealing performance at the drive shaft 302. Install the water inlet head 209 and the drain head 208 through threaded connections (first external thread 16, second external thread 17) to ensure a sealed connection between the water inlet pipe 207 and the drain pipe 206. The circulating cooling system device connected to the water inlet head 209 and the drain head 208 is not shown in the diagram.

[0043] Material is poured in from the top of the inner grinding barrel 202 and enters the inner grinding barrel 202; cooling water is introduced from the water inlet 209 and flows through the water inlet pipe 207 into the cooling barrel 204 to cool the inner grinding barrel 202 during the grinding process. When the amount of water in the cooling barrel 204 reaches a certain amount, the overflowing part will flow out through the drain pipe 206.

[0044] II. Grinding Stage: Driven and Shear Crushing

[0045] The drive motor 301 starts and drives the moving grinding head 306 to rotate at high speed through the drive shaft 302 (the mating part 5 mates with the drive shaft 302, and the positioning rod 307 fixes the axial position of the moving grinding head 306 to prevent displacement during rotation); the limiting plate 305 is fixed in the limiting groove 6 of the limiting seat 303 by the second screw 12, and the third sealing ring 304 ensures the seal between the drive shaft 302 and the limiting seat 303 to prevent dust or liquid from entering the drive motor 301.

[0046] The moving grinding part 308 on the outer surface of the moving grinding head 306 and the stationary grinding part 205 on the inner wall of the stationary grinding inner barrel 202 are arranged alternately to form a uniform grinding gap. When the moving grinding head 306 rotates, the moving grinding part 308 and the stationary grinding part 205 generate relative motion, applying shearing force, friction force and impact force to the material, crushing and refining the material. The equidistant design of adjacent moving grinding parts 308 and stationary grinding parts 205 ensures that the material is subjected to uniform force.

[0047] The cooling water in the cooling tank 204 can remove the heat generated during grinding, preventing the material from denaturing due to high temperature or the equipment from overheating. After absorbing heat, the cooling water can be discharged through the drain pipe 206, forming a circulating cooling system (or it can be replaced periodically as needed).

[0048] After the work is completed, loosen the locking part 405 of the locking and disassembly mechanism 4, and open the first fastening part 401 and the second fastening part 403 through the first movable column 402 and the second movable column 404 to separate the grinding drive mechanism 3 and the grinding mechanism 2; the drive motor 301 and the limit seat 303 are connected by the third screw 13, and can be separated synchronously during disassembly, which is convenient for motor maintenance or component reset (the screw positioning ensures the consistency of the grinding gap during reassembly).

[0049] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A small vertical sand mill comprising a machine body, a grinding mechanism, and a grinding drive mechanism installed in the machine body, the machine body being in a C shape, the grinding mechanism being disposed below the grinding drive mechanism, characterized in that, A locking and disassembly mechanism is fitted between the grinding drive mechanism and the grinding mechanism; The grinding mechanism comprises, from top to bottom, a first sealing ring, a static grinding inner barrel, a second sealing ring, and a cooling barrel. The tops of both the static grinding inner barrel and the cooling barrel are annularly arranged. The outer edge of the top of the static grinding inner barrel extends from the inside out, and the inner edge of the top of the cooling barrel extends from the outside in. The static grinding inner barrel is fixedly mounted on the cooling barrel. Several static grinding sections are arranged around the inner wall of the static grinding inner barrel, with a consistent spacing between adjacent static grinding sections. A drain pipe and a water inlet pipe extend outward from one side of the cooling barrel. A drain head is installed at one end of the drain pipe, and the end of the drain pipe away from the drain head extends into the interior of the cooling barrel. A water inlet head is installed at one end of the water inlet pipe, and the end of the drain pipe away from the water inlet head connects to the interior of the cooling barrel.

2. A compact vertical sand mill according to claim 1, characterized in that: The grinding drive mechanism includes, from top to bottom, a drive motor, a drive shaft, a limiting seat, a third sealing ring, a limiting disc, a moving grinding head, and a positioning rod. The moving grinding head is mounted on the positioning rod. The end of the drive shaft near the moving grinding head is provided with a mating part that cooperates with the moving grinding head. The limiting disc and the limiting seat are both mounted on the drive shaft. The tail of the positioning rod is fixedly mounted on the drive shaft.

3. A compact vertical sand mill according to claim 2, characterized in that: The limiting seat extends inward on the side near the limiting plate to provide a limiting groove for mounting the limiting plate. The limiting plate is provided on the side near the limiting seat to provide a first mounting groove for mounting the third sealing ring. The outer surface of the moving grinding head is surrounded by a plurality of moving grinding parts that cooperate with the stationary grinding part, and the spacing between two adjacent moving grinding parts is consistent.

4. A compact vertical sand mill according to claim 3, characterized in that: The locking and unlocking mechanism includes, from left to right, a first fastening member, a first movable post, a second fastening member, a second movable post, and a locking member. The first fastening member and the second fastening member are hinged to each other through the first movable post. The end of the first fastening member away from the first movable post is provided with a first locking groove, and the end of the second fastening member away from the first movable post is provided with a second locking groove. One end of the locking member is movably mounted on the second locking groove through the second movable post. The locking member can be fastened to the first locking groove. The first fastening member is fixedly mounted on the limiting seat. The inner walls of both the first fastening member and the second fastening member are provided with fastening grooves that cooperate with the limiting seat and the cooling tank.

5. A compact vertical sand mill according to claim 4, characterized in that: The static grinding inner barrel is fixedly installed on the cooling barrel by the first screw, and the limiting plate is fixedly installed on the limiting groove by the second screw.

6. A compact vertical sand mill according to claim 4, characterized in that: The drive motor is installed inside the machine body, the limiting seat is installed outside the machine body, and the drive motor is connected to the limiting seat by a third screw.

7. A compact vertical sand mill according to any one of claims 1 to 6, characterized in that: The top of the static grinding inner barrel, near the inner ring, is provided with a second mounting groove for installing the first sealing ring.

8. A compact vertical sand mill according to any one of claims 1 to 6, characterized in that: The top of the cooling tank, near the inner ring, is provided with a third mounting groove for installing the second sealing ring.

9. A compact vertical sand mill according to any one of claims 1 to 6, characterized in that: The water outlet pipeline is provided with a first external thread at one end away from the cooling barrel, and the water inlet pipeline is provided with a second external thread at one end away from the cooling barrel, which is matched with the water inlet head.

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