CN116510845B

CN116510845B - Sand mill

Info

Publication number: CN116510845B
Application number: CN202310646165.5A
Authority: CN
Inventors: 张敦凯; 张余俊; 蒋为华; 陈斌彬
Original assignee: Jiangsu Fafulai Industrial Intelligent Equipment Co ltd
Current assignee: Jiangsu Fafulai Industrial Intelligent Equipment Co ltd
Priority date: 2023-06-02
Filing date: 2023-06-02
Publication date: 2024-02-02
Anticipated expiration: 2043-06-02
Also published as: CN116510845A

Abstract

The invention relates to a sand mill, which comprises a base, wherein a transmission case is arranged on the base, one side of the transmission case is respectively provided with a grinding cylinder body and a main motor, a main shaft is arranged in the grinding cylinder body, the main motor is in transmission connection with one end of the main shaft through a belt wheel in the transmission case, a feeding hole and a discharging hole are formed in the grinding cylinder body, a bead adding hole communicated with the interior of the grinding cylinder body and used for adding zirconium beads is formed in the top of one side of the grinding cylinder body, a bead outlet communicated with the interior of the grinding cylinder body and used for discharging zirconium beads is formed in the bottom of one side of the grinding cylinder body, a plurality of dispersing discs are uniformly arranged on the outer wall of the main shaft along the axial direction of the main shaft, and a plurality of crescent-shaped dividing holes are uniformly distributed on each dispersing disc at intervals. According to the novel grinding device, the plurality of dispersing discs with special structures are fixed on the outer wall of the main shaft, so that the phenomenon that zirconium beads are accumulated to a discharging position in the grinding process is avoided, the materials are ground more fully, and the grinding effect of the materials is greatly improved.

Description

Sand mill

Technical Field

The invention relates to the technical field of chemical material production equipment, in particular to a sand mill.

Background

The sand mill is also called a bead mill, is mainly used for wet grinding of chemical liquid products, and can be generally classified into a horizontal sand mill, a basket sand mill, a vertical sand mill and the like according to the use performance. The grinding machine mainly comprises a machine body, a grinding cylinder, a grinding disc (deflector rod), a grinding medium, a motor and a feeding pump, wherein the feeding speed is controlled by the feeding pump. The grinding media of the apparatus are generally classified into zirconia beads, glass beads, zirconium silicate beads, and the like. The sand mill is grinding equipment with the widest adaptability, the most advanced and highest efficiency, the narrowest grinding cavity, the smallest deflector rod gap and the most intensive grinding energy, and can realize continuous processing and continuous discharging of materials by matching with a high-performance cooling system and an automatic control system, thereby greatly improving the production efficiency.

In the prior art, as disclosed in chinese patent publication No. CN 101972691B, a horizontal sand mill is disclosed, which comprises a stand, a motor fixed on the stand, a main shaft connected with the motor through a belt wheel, and a grinding cylinder body, wherein the main shaft is hollow, a cooling oil chamber is fixedly arranged around the main shaft, a cooling water inlet and outlet channel is formed in the middle, a plurality of grinding rods are fixedly arranged around the outer wall of a grinding inner sleeve, a water cooling pipe is arranged in the grinding inner sleeve, a U-shaped spiral water outlet channel is fixedly arranged around the outer wall of the cooling pipe, and a feed inlet and a discharge outlet are arranged on a grinding outer sleeve; the machine adopts double-end-face mechanical seal, and a sealing ring is arranged at the joint of the bearing and the shaft.

The prior art solutions described above have the following drawbacks: the bedroom sand mill is similar to most of the sand mills in the market in structure, a structure that a plurality of grinding rods are fixedly arranged around the outer wall of the grinding inner sleeve is adopted, when the horizontal sand mill works, the motor drives the intermediate shaft, the grinding cylinder body and the cooling water pipe to rotate at high speed through the V-shaped belt and the main shaft, and the grinding rods on the grinding inner sleeve drive the medium in the grinding cylinder body to move at high speed so as to generate great impact, friction and shearing force, so that the material can be fully ground and dispersed. However, because in long-time grinding process, because the abrasive material has the fluidity when the business turn over material, lead to grinding in-process zirconium pearl can pile up to ejection of compact department, lead to the unable normal discharge of material, make machine work efficiency slow down on the one hand, on the other hand the structural design of grinding rod makes the material can not grind more fully, has reduced the effect of grinding.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a sand mill, which is characterized in that a plurality of dispersing discs with special structures are fixed on the outer wall of a main shaft, so that the phenomenon that zirconium beads are accumulated to a discharging position in the grinding process is avoided, the materials are ground more fully, and the grinding effect of the materials is greatly improved.

The above object of the present invention is achieved by the following technical solutions:

the sand mill comprises a base, wherein a transmission box is arranged on the base, a grinding cylinder body and a main motor are respectively arranged on one side of the transmission box, a main shaft is arranged in the grinding cylinder body, the main motor is in transmission connection with one end of the main shaft through a belt wheel in the transmission box, a feed inlet and a discharge outlet are formed in the grinding cylinder body, a bead adding port which is communicated with the interior of the grinding cylinder body and used for adding zirconium beads is formed in the top of one side of the grinding cylinder body, a bead outlet which is communicated with the interior of the grinding cylinder body and used for discharging zirconium beads is formed in the bottom of one side of the grinding cylinder body, a plurality of dispersing discs are uniformly arranged on the outer wall of the main shaft along the axial direction of the main shaft, and a plurality of crescent-shaped separating holes are uniformly distributed on each dispersing disc at intervals;

three uniform flat sections are arranged on the outer circle of the dispersion disc; the distance between the plane section and the center point of the dispersion disc is 135mm-160mm;

a discharge turbine is arranged in the grinding cylinder body and close to one side of the discharge port, the number of the separation holes on one dispersing disc adjacent to the discharge turbine is six, and the number of the separation holes on the other dispersing discs is three, and the separation holes are uniformly distributed on the surface of the dispersing disc in a ring shape according to 120 degrees and penetrate through the dispersing disc;

the inner wall surfaces of six separation holes on one dispersion plate adjacent to the discharge turbine are inclined at 45 degrees relative to the end surface on the outer side of the dispersion plate, and the groove wall surfaces of the groove openings of the separation holes on the rest dispersion plates are perpendicular to the end surface of the dispersion plate.

The present invention may be further configured in a preferred example to: the distance between the plane tangential plane and the center point of the dispersion disk is 145mm.

The present invention may be further configured in a preferred example to: the grinding cylinder body comprises an outer cylinder body and a grinding inner container arranged in the outer cylinder body, a cooling channel is formed between the outer wall of the grinding inner container and the inner wall of the outer cylinder body, and a spiral diversion trench is arranged in the cooling channel;

the cooling channel is provided with a partition ring along the middle position of the axial direction of the grinding inner container, the partition ring divides the cooling channel into a plurality of cooling areas, and each cooling area is provided with a cooling water inlet and a cooling water outlet on the outer cylinder.

The present invention may be further configured in a preferred example to: an electric control box is arranged on one side of the transmission box, and an operation panel connected with the electric control box is arranged on the transmission box;

a pressure gauge, a one-way valve and a diaphragm pump for conveying materials are arranged on a pipeline connected with the feeding hole, and a thermometer is arranged on a pipeline connected with the discharging hole;

an organic sealing liquid tank is arranged on one side of the transmission case, and the organic sealing liquid tank is connected with a gear pump;

one side of the base is connected with a support, and a moving-out trolley is arranged on the support.

In summary, the present invention includes at least one of the following beneficial technical effects:

compared with the sand mill in the prior art, the invention replaces the grinding rod structure on the main shaft in the original sand mill with a plurality of dispersion plates, and a plurality of crescent-shaped dividing holes are uniformly distributed on each dispersion plate at intervals. When in operation, the dispersing disc can generate an axial force opposite to the flow direction of the zirconium beads during rotation, so that the zirconium beads are smoothly discharged away from the discharging device during operation.

Furthermore, the distance between the trisection plane tangential surface and the center point of the dispersing disc is shortened from 160mm to 145mm, so that the attack surface is enlarged, the grinding effect is greatly improved, and the grinding effect and efficiency are enhanced. According to the novel grinding device, the plurality of dispersing discs with special structures are fixed on the outer wall of the main shaft, so that the phenomenon that zirconium beads are accumulated to a discharging position in the grinding process is avoided, the materials are ground more fully, and the grinding effect of the materials is greatly improved.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a left side view of the present invention.

Fig. 3 is a right side view of the present invention.

Fig. 4 is a top view of the present invention.

Fig. 5 is an enlarged view of the portion a in fig. 1.

Fig. 6 is an enlarged view of the portion B in fig. 5.

Fig. 7 is an enlarged view of a portion C in fig. 1.

Fig. 8 is a schematic structural view of a dispersion disk in the second embodiment.

Fig. 9 is a schematic structural view of a dispersion disk in the third embodiment.

Fig. 10 is a schematic view showing the structure of the split holes in the dispersion disk in the third embodiment.

Reference numerals: 1. a base; 2. a transmission case; 3. a grinding cylinder; 4. a main motor; 5. a main shaft; 6. a feed inlet; 7. a discharge port; 8. a bead adding port; 9. a bead outlet; 10. a dispersion plate; 11. dividing holes; 12. cutting the dough flat; 13. a discharge turbine; 14. an outer cylinder; 15. grinding the inner container; 16. a cooling channel; 17. a partition ring; 18. an electric control box; 19. an operation panel; 20. a pressure gauge; 21. a diaphragm pump; 22. a thermometer; 23. a one-way valve; 24. sealing the liquid tank by a machine; 25. a gear pump; 26. a bracket; 27. removing the trolley; 28. a spacer bush; 29. a bead adding funnel; 30. and (5) plugging.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; it is apparent that the described embodiments are only a part of the embodiments of the present application, not all of the embodiments, and all other embodiments obtained by a person having ordinary skill in the art without making creative efforts based on the embodiments in the present application are within the scope of protection of the present application.

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the devices or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Embodiment one:

referring to fig. 1-4, a sand mill disclosed by the invention comprises a base 1, wherein the base 1 is provided with adjustable supporting legs, so that a user can conveniently transport equipment to a place to adjust the horizontal position of the equipment. The base 1 is provided with a transmission case 2, one side of the transmission case 2 is provided with an electric control case 18, and the transmission case 2 is provided with an operation panel 19 connected with the electric control case 18. One side of the transmission case 2 is respectively provided with a grinding cylinder body 3 and a main motor 4, a main shaft 5 is arranged in the grinding cylinder body 3, and the main motor 4 is in transmission connection with one end of the main shaft 5 through a belt wheel in the transmission case 2.

Referring to fig. 1-4, an engine seal liquid tank 24 is installed on one side of the transmission case 2, the engine seal liquid tank 24 is connected with a gear pump 25, the engine seal liquid tank 24 is used for cooling engine seal liquid to prevent the temperature of the engine seal cooling liquid from being too high, and the gear pump 25 is used for circulating the engine seal liquid in the engine seal liquid tank 24 so as to prevent the engine seal from generating high temperature during high-speed operation of the engine seal and causing engine seal necrosis. One side of the base 1 is connected with a support 26, a moving-out trolley 27 is arranged on the support 26, and the moving-out trolley 27 is convenient for a user to clean and maintain equipment.

Structural optimization is also carried out at the bead adding port 8, and the inner side of the end cover of the barrel body of the old bead adding port 8 is as the point of the graph D, and the wear is serious and the damage is great due to the fact that the old bead adding port is impacted by zirconium beads for a long time during grinding, so that the sealing port treatment is carried out. The plug 30 is arranged on the sand adding port, the plug 30 and the sand adding port are subjected to sectional treatment, so that erosion of zirconium beads to equipment is avoided, damage to the equipment is reduced, and the sand adding port is additionally provided with the quick-mounting buckle type funnel, so that sand adding operation is facilitated.

A pressure gauge 20, a one-way valve 23 and a diaphragm pump 21 for conveying materials are arranged on a pipeline connected with the feed inlet 6, and the pressure gauge 20 is convenient for observing the pressure inside the cylinder during working. Install thermometer 22 on connecting the pipeline of discharge gate 7, thermometer 22's setting is convenient for observe the temperature variation of during operation material, and check valve 23's setting is used for preventing zirconium pearl outflow.

Referring to fig. 5 to 6, the grinding cylinder 3 is provided with a feed port 6 and a discharge port 7, a bead adding port 8 for adding zirconium beads is provided on the top of one side of the grinding cylinder 3, which communicates with the interior of the grinding cylinder 3, and in this embodiment, a conical bead adding funnel 29 is mounted on the bead adding port 8. The bottom of one side of the grinding cylinder body 3 is provided with a bead outlet 9 which is communicated with the inside of the grinding cylinder body 3 and is used for discharging zirconium beads.

Referring to fig. 1, a plurality of dispersion plates 10 are uniformly arranged on the outer wall of the main shaft 5 along the axial direction thereof, and a plurality of crescent-shaped separating holes 11 are uniformly distributed on each dispersion plate 10 at intervals. A discharge turbine 13 is arranged in the grinding cylinder 3 near the discharge port 7, in this embodiment, a spacer bush 28 is fixed on the outer wall of the main shaft 5, and a plurality of dispersion plates 10 are uniformly fixed on the outer wall of the spacer bush 28.

In this embodiment, the type of the sand mill is an FSP100L sand mill, which is used as a high-efficiency disc type sand mill, and the main motor 4 drives the belt pulley (the belt pulley is an european-standard taper sleeve belt pulley), and the belt pulley drives the main shaft 5 to rotate (the rotation direction is counterclockwise rotation), so that the main shaft 5 drives the dispersion disc 10 to rotate counterclockwise, thereby hammering the zirconium beads, so that shearing force is generated between the zirconium beads to shear materials.

Referring to fig. 7, the grinding cylinder 3 includes an outer cylinder 14 and a grinding inner container 15 installed inside the outer cylinder 14, a cooling channel 16 is formed between an outer wall of the grinding inner container 15 and an inner wall of the outer cylinder 14, and a spiral diversion trench is provided in the cooling channel 16; a partition ring 17 is mounted at the middle position of the cooling channel 16 along the axial direction of the grinding liner 15, the partition ring 17 divides the cooling channel 16 into a plurality of cooling areas, and a cooling water inlet and a cooling water outlet are arranged on the outer cylinder 14 of each cooling area.

Because zirconium beads and zirconium beads can rub in the collision shearing process to cause continuous heating, a spiral diversion trench is arranged between the outer cylinder 14 and the grinding liner and is used for cooling the cooling medium, so that the characteristics of materials are not changed. Further, a partition ring 17 is provided in the middle of the cooling passage 16 between the grinding inner container 15 and the outer cylinder 14 for sectional cooling to double the cooling effect.

The machine adopts the cooling design of the outer jacket of the grinding cylinder body 3, so that heat generated in the working process can be rapidly discharged. The water consumption is increased or decreased with the water temperature, the product fineness requirement, the material viscosity, the pigment hardness and the grinding medium filling amount. The machine was equipped with two water outlet pipes connected to an open drain tank for visual inspection of the cooling water flow. The minimum diameter of the drain pipe is 1.5 inches, and the cooling water pressure is not lower than 2kg/Cm.

The material after passing through the grinding area flows out from the discharge hole 7 to enter the next working procedure. The discharging device consists of a screen and a screen base, the screen is arranged on the screen base, the screen is of a wire winding and inverted trapezoid structure, the screen is provided with slit holes, the slit holes are small outside and large inside (the size of the slit holes depends on the size of the selected zirconium beads and can be flexibly replaced).

Because the high-efficiency and stable characteristics are highlighted, the discharging device and the barrel back cover are provided with a water inlet and a water outlet, and the temperature and the characteristics of materials are strictly controlled, as shown in figure 6.

In this embodiment, referring to fig. 8, three crescent-shaped separating holes 11 are uniformly distributed on each dispersing disc 10 for the sand mill at intervals, and the three crescent-shaped separating holes 11 are uniformly distributed on the surface of the dispersing disc 10 at 120 ° in a ring shape and penetrate through the dispersing disc 10. And chamfer angles are formed at the two ends of each crescent-shaped separating hole 11 so as to avoid point impact on zirconium beads during grinding materials, and effectively prolong the service life of the dispersion disc 10.

Referring to fig. 8, three uniform flat cut surfaces 12 are formed on the outer circumference of the dispersion disk 10, and the distance between the flat cut surfaces 12 and the center point of the dispersion disk 10 is 135mm-160mm. In this embodiment, the planar cut surface 12 is 160mm from the center point of the dispersion plate 10.

Embodiment two:

the invention also discloses a sand mill, which is different from the first embodiment in that on the basis of the first embodiment, referring to fig. 8, the distance between the flat tangential surface 12 of the dispersion disc 10 and the center point of the dispersion disc 10 is shortened, and the original 160mm is adjusted to 145mm, so that the attack surface is enlarged, and the grinding effect is greatly improved.

Embodiment III:

the present invention also discloses a sand mill, which is different from the first embodiment in that, referring to fig. 9, on the basis of the first embodiment, the number of the separation holes 11 on one dispersion plate 10 of the adjacent discharge turbine 13 is set to six, the number of the separation holes 11 on the other dispersion plate 10 is set to three, and the separation holes are uniformly distributed on the surface of the dispersion plate 10 at 120 ° in a ring shape and penetrate the dispersion plate 10, and the inner wall surfaces of the six separation holes 11 on one dispersion plate 10 of the adjacent discharge turbine 13 are set at an inclination of 45 ° with respect to the end surface on the outer side of the dispersion plate 10 (referring to fig. 10).

Because the abrasive materials have fluidity when fed and discharged in the long-time grinding process, zirconium beads can be accumulated at the discharge position in the grinding process and cannot be normally discharged, so that the working efficiency of the machine is reduced. Therefore, for this symptom, a special design is made on a piece of dispersing disc 10 adjacent to the discharge turbine 13, the original dividing hole 11 with a trisection crescent shape is changed into a dividing hole 11 with a six-trisection crescent shape, the shifting notch is designed, and the groove wall surface of the notch is not perpendicular to the end surface of the dispersing disc 10 but has a 45 DEG angle with the opposite end surface.

In operation, the dispersion disk 10 generates an axial force which is opposite to the flow direction of the zirconium beads when rotating, so that the zirconium beads are smoothly discharged away from the discharging device when in operation. The above-mentioned discharge turbine 13 also has the same effect as the dispersion disk 10, except that the force of rotating the discharge turbine to stir the beads is not axial force but radial force, so as to push the zirconium beads close to the screen to the outside without making the zirconium beads close to the screen, and in order to ensure the stability of the discharge turbine 13 during operation, weight reduction and dynamic balance treatment are carried out on the discharge turbine 13 during design under the condition of not affecting the strength.

Embodiment four: the invention also discloses a sand mill, which is different from the first embodiment with reference to fig. 8, in that on the basis of the first embodiment, the distance between the flat tangential surface 12 of the dispersion disc 10 and the center point of the dispersion disc 10 is shortened, and the original 160mm is adjusted to 145mm, so that the attack surface is enlarged, and the grinding effect is greatly improved. And the number of the dividing holes 11 in one dispersion disk 10 of the adjacent discharge turbine 13 is set to six, and the inner wall surfaces of the six dividing holes 11 in the dispersion disk 10 are inclined at 45 ° with respect to the end surface on the outside of the dispersion disk 10.

Because the abrasive materials have fluidity when fed and discharged in the long-time grinding process, zirconium beads can be accumulated at the discharge position in the grinding process and cannot be normally discharged, so that the working efficiency of the machine is reduced. Therefore, for the symptom, a special design is made on a piece of dispersing disc 10 adjacent to the discharge turbine 13, the original dividing hole 11 with a trisection crescent shape is changed into a dividing hole 11 with a six-trisection crescent shape, the shifting notch is designed, and the groove wall surface of the notch is not perpendicular to the end surface of the dispersing disc 10 but has a 45-degree angle relative to the end surface.

The sand mill is a wet grinding machine used for grinding and dispersing solid-liquid phase materials, is widely applied to industrial departments such as paint, printing ink, magnetic recording materials, medicines, nonmetallic ores and the like, and has the advantages of high productivity, strong process continuity, low cost and the like compared with ball mills, three-roller grinders, colloid mills and the like.

The discharge device of the sand mill adopts a discharge structure of an axial dynamic screen slot, reliably prevents grinding media from escaping from the screen slot, and ensures the safe operation of equipment by controlling and monitoring the pressure and the temperature by an electric contact pressure gauge 20 (a feed end) and a thermometer 22 (a discharge end) respectively.

The dispersion disk 10 is a main working element of the sand mill, the shape, the size and the installation number of each part of the dispersion disk have direct influence on the grinding efficiency, and the series of sand mills are provided with the dispersion disk 10 with two different shapes so as to overcome the follow-up phenomenon of the movement of materials in a cylinder. Higher grinding efficiency is achieved. Different types of dispersion plates 10 can also be selected according to the requirements of users.

Working principle: the main motor 4 drives the main shaft 5 to rotate at high speed through the V-shaped belt, and the disperser with a special structure on the conical rotor connected with the main shaft 5 drives the grinding medium to move at high speed so as to generate extremely strong impact, friction and shearing force, so that the materials can be fully crushed and dispersed.

The machine adopts precise and reliable mechanical seal, has high reliability and durability, and the grinding cylinder is completely sealed, thereby avoiding air mixing, preventing generation of bubbles and volatilization of solvent, and greatly reducing environmental pollution.

The machine adopts a dynamic separator to separate grinding media and ground materials, so that the machine is particularly suitable for continuous production of products. The grinding medium can not be blocked in the gap due to the self-cleaning function of the device, so the device has long service life.

The sand mill is characterized in that:

1. high flow rate: static centrifugal discharging device, super large discharging area, large flow.

2. The double-end-face mechanical seal is safe and reliable because the mechanical lubricating liquid is compatible with the materials.

3. The special high-wear-resistance alloy steel material ensures the service life of equipment.

4. Cooling efficiency: the adoption of the sectional double-spiral water channel is more beneficial to cold and hot replacement, and the cooling efficiency is 2 times that of a common machine type.

5 intelligent double-end-face mechanical seal: the mechanical sealing technology, the inlet perfluorinated sealing ring, can resist various solvents.

6 grinding: compared with the common machine type, the dispersing efficiency can be improved by more than 30%, the combined type disperser group can be adopted to rapidly improve the dispersing efficiency, and the grinding medium can be ultrafine grinding medium, so that the dispersing machine is more efficient.

In the present invention, the sand mill in the fourth embodiment was compared with the sand mill of the prior art with a grinding rod structure for material sand milling test, and the test data are shown in the following table:

conclusion: under the conditions of the same materials and yield and the same rotating speed and bead adding amount, the efficiency of the sand mill can be greatly improved by changing the disc type, and the original grinding for 4 times is improved to reach the fineness requirement only by 3 times.

The implementation principle of the invention is as follows: compared with the sand mill in the prior art, the invention replaces the grinding rod structure on the main shaft 5 in the original sand mill with a plurality of dispersion plates 10, and a plurality of crescent-shaped separating holes 11 are uniformly distributed on each dispersion plate 10 at intervals. In operation, the dispersion disk 10 generates an axial force which is opposite to the flow direction of the zirconium beads when rotating, so that the zirconium beads are smoothly discharged away from the discharging device when in operation.

Further, a certain adjustment is made relative to the old version of the dispersion disc 10, so that the distance between the trisection flat tangential surface 12 and the corresponding center point is shortened from 160mm to 145mm, the attack surface is enlarged, the grinding effect is greatly improved, and the grinding effect and efficiency are enhanced. According to the grinding device, the plurality of dispersing discs 10 with special structures are fixed on the outer wall of the main shaft 5, so that the phenomenon that zirconium beads are accumulated to a discharging position in the grinding process is avoided, the materials are ground more fully, and the grinding effect of the materials is greatly improved.

The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims

1. The utility model provides a sand mill, includes base (1), install transmission case (2) on base (1), grinding cylinder body (3) and main motor (4) are installed respectively to one side of transmission case (2), the internally mounted of grinding cylinder body (3) has main shaft (5), main motor (4) are through band pulley in transmission case (2) with one end transmission of main shaft (5) is connected, be equipped with feed inlet (6) and discharge gate (7) on grinding cylinder body (3), a serial communication port, one side top on grinding cylinder body (3) be equipped with be used for adding pearl mouth (8) of adding zirconium pearl of grinding cylinder body (3) inside intercommunication, one side bottom on grinding cylinder body (3) be equipped with be used for discharging the play pearl mouth (9) of zirconium pearl of grinding cylinder body (3) inside intercommunication, evenly be provided with a plurality of dispersion disk (10) on the outer wall of main shaft (5) along its axial, every dispersion disk (10) are last interval evenly distributed has a plurality of crescent moon shaped split hole (11);

three uniform plane sections (12) are formed on the outer circle of the dispersion disc (10); the distance between the flat cutting surface (12) and the center point of the dispersion disc (10) is 135mm-160mm;

a discharge turbine (13) is arranged in the grinding cylinder body (3) and close to one side of the discharge port (7), the number of the separation holes (11) on one dispersing disc (10) adjacent to the discharge turbine (13) is six, the number of the separation holes (11) on the rest dispersing discs (10) is three, and the separation holes are uniformly distributed on the surface of the dispersing discs (10) at 120 degrees in a ring shape and penetrate through the dispersing discs (10);

the inner wall surfaces of six separation holes (11) on one dispersing disc (10) adjacent to the discharging turbine (13) are inclined at 45 degrees relative to the end surface on the outer side of the dispersing disc (10), and the groove wall surfaces of the groove openings of the separation holes (11) on the rest dispersing discs (10) are perpendicular to the end surface of the dispersing disc (10).

2. A sand mill according to claim 1, characterized in that the distance of the flat cut surface (12) to the centre point of the dispersion disc (10) is 145mm.

3. A sand mill according to claim 1, characterized in that the grinding cylinder (3) comprises an outer cylinder (14) and a grinding inner container (15) mounted inside the outer cylinder (14), a cooling channel (16) is formed between the outer wall of the grinding inner container (15) and the inner wall of the outer cylinder (14), and a spiral diversion trench is arranged in the cooling channel (16);

a partition ring (17) is arranged at the middle position of the cooling channel (16) along the axial direction of the grinding inner container (15), the partition ring (17) divides the cooling channel (16) into a plurality of cooling areas, and a cooling water inlet and a cooling water outlet are arranged on the outer cylinder (14) of each cooling area.

4. A sand mill according to claim 1, characterized in that an electric cabinet (18) is arranged on one side of the transmission box (2), and an operation panel (19) connected with the electric cabinet (18) is arranged on the transmission box (2);

a pressure gauge (20), a one-way valve (23) and a diaphragm pump (21) for conveying materials are arranged on a pipeline connected with the feeding hole (6), and a thermometer (22) is arranged on a pipeline connected with the discharging hole (7);

an organic sealing liquid tank (24) is arranged on one side of the transmission case (2), and the organic sealing liquid tank (24) is connected with a gear pump (25);

one side of the base (1) is connected with a support (26), and a moving-out trolley (27) is arranged on the support (26).