Double centrifugal separation structure sand mill

Abstract

The application discloses a double centrifugal separation structure sand mill, which comprises a main shaft, a discharging channel is arranged in the main shaft, a discharging port is connected to the top of the main shaft, a discharging upper machine seal is connected to the upper end of the main shaft, a driven pulley is connected to the middle of the main shaft, a bearing box is rotatably connected to the lower end of the main shaft, the lower end of the main shaft extends into an outer cylinder body and is connected to a rotor and a discharging inner turbine assembly, a discharging hole is formed in the bottom of the main shaft, a cylinder body mounting upper flange is arranged on the top of the outer cylinder body, a bottom cover is connected to the bottom of the outer cylinder body, an inner container assembly is arranged in the outer cylinder body, a heat dissipation inner cylinder assembly is arranged below the discharging inner turbine assembly, a feeding port is connected to the top of the cylinder body mounting upper flange, and the feeding port is in communication with the inner container assembly. The sand mill has a simple structure, can reduce the resistance of a conveying pipeline, does not need to bear high pressure and high temperature, and is convenient for feeding; the rotor and the discharging inner turbine assembly form a double centrifugal separation structure, the separation effect is better under the condition that the grinding effect is unchanged, and the backflow of materials and grinding media in a grinding cavity can be prevented.

Description

Technical Field

[0001] This invention relates to the field of sand mill technology, and specifically to a sand mill with a dual centrifugal separation structure. Background Technology

[0002] Sand mills are currently the most adaptable, advanced, and efficient grinding equipment, available in horizontal and vertical configurations. The working principle of a vertical sand mill involves a dispersing disc driving the grinding media at high speed, generating friction and shearing to grind and disperse the material. It is a highly efficient grinding and dispersing device widely used in industries such as paints, cosmetics, food, daily chemicals, dyes, inks, pharmaceuticals, ferrites, and photographic film. Traditional sand mills have screen-based material separation devices. When the material added to the chamber has a high viscosity, the screen can easily become clogged under conveying pressure, causing downtime. Cleaning the screen after shutdown is also time-consuming and labor-intensive, hindering subsequent production and reducing efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a sand mill with a dual centrifugal separation structure to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: A sand mill with a dual centrifugal separation structure includes a main shaft, a discharge channel inside the main shaft, a discharge port connected to the top of the main shaft, a discharge upper seal connected to the upper end of the main shaft, a driven pulley connected to the middle of the main shaft, a bearing housing rotatably connected to the lower end of the main shaft, the lower end of the main shaft extending into the outer cylinder and connecting a rotor and a discharge inner turbine assembly, a discharge hole opened at the bottom of the main shaft located inside the discharge inner turbine assembly, a cylinder mounting flange installed at the top of the outer cylinder, a bottom cover connected to the bottom, an inner liner assembly installed inside the outer cylinder, a heat dissipation inner cylinder assembly located below the discharge inner turbine assembly, a feed port connected to the top of the cylinder mounting flange, and the feed port communicating with the interior of the inner liner assembly.

[0004] Preferably, a lower mechanical seal is installed between the upper flange and the main shaft of the cylinder.

[0005] Preferably, the inner liner assembly includes an inner liner, which has a cylindrical structure and inner rods installed on its inner wall.

[0006] Preferably, the rotor includes a rotor body, the top of which is connected to a main shaft, and the sidewall of the rotor body is connected to an outer rod. The outer rod and inner rod are staggered at the outer wall of the rotor body. The upper end of the rotor body has a main separation hole, the position of which corresponds to the position of the turbine assembly in the discharge section.

[0007] Preferably, the heat dissipation inner cylinder assembly includes a heat dissipation inner cylinder, the bottom of which is in sealed contact with the bottom of the inner liner assembly. An internal support member is connected to the inner side of the heat dissipation inner cylinder. The internal support member has a hollow structure and a bottom cover is connected to its bottom. A pressure plate is connected to the top of the internal support member, and the pressure plate presses the heat dissipation inner cylinder. A spiral water groove is installed on the outer wall of the internal support member. The spiral water groove and the heat dissipation inner cylinder form a spiral water channel in the inner cylinder. The upper end of the spiral water channel in the inner cylinder is connected to an outlet pipe, and the lower end is connected to an inlet pipe. The lower ends of the outlet pipe and the inlet pipe extend out of the bottom cover.

[0008] Preferably, the discharge inner turbine assembly includes a discharge inner turbine, the bottom of the main shaft is connected to the discharge inner turbine, the top of the discharge inner turbine is connected to a pressure cap, the pressure cap is connected to the main shaft, the discharge hole is located inside the discharge inner turbine, and the side wall of the discharge inner turbine has a secondary separation hole.

[0009] Preferably, a heat dissipation spiral water channel is provided between the outer cylinder and the inner liner, and a heat dissipation outlet and a heat dissipation inlet are respectively connected to the upper and lower ends of the outer cylinder, and the heat dissipation outlet and the heat dissipation inlet are connected to the heat dissipation spiral water channel of the inner liner.

[0010] Preferably, a protective housing is connected to the outside of the passive pulley and the bearing housing, and a connection port is opened at the corresponding position of the protective housing and the passive pulley. The discharge upper mechanical seal is connected to the protective housing through a mechanical seal mounting plate.

[0011] Preferably, a slag discharge port is provided on one side of the bottom cover.

[0012] The technical effects and advantages of this invention are as follows: This sand mill has a simple structure, which can reduce the resistance of the conveying pipeline, avoid the need to withstand high pressure and high temperature, and make feeding more convenient; the rotor and the turbine assembly inside the discharge chamber form a double centrifugal separation structure, which can improve the separation effect while ensuring that the grinding effect remains unchanged, and can prevent the backflow of materials and grinding media in the grinding chamber. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention;

[0014] Figure 2 This is the front view of the present invention;

[0015] Figure 3 This is the left view of the present invention;

[0016] Figure 4 for Figure 2 A cross-sectional view along the AA direction;

[0017] Figure 5 for Figure 3 A cross-sectional view along the BB direction;

[0018] Figure 6 This is a schematic diagram of the inner liner structure of the present invention;

[0019] Figure 7 This is a schematic diagram of the rotor structure of the present invention;

[0020] Figure 8 This is a schematic diagram of the internal turbine structure for material discharge according to the present invention.

[0021] In the diagram, 1. Main shaft; 2. Discharge channel; 3. Discharge port; 4. Upper mechanical seal for discharge; 5. Passive pulley; 6. Bearing housing; 7. Protective outer shell; 8. Mechanical seal mounting plate; 9. Connection port; 10. Outer cylinder; 11. Discharge hole; 12. Upper flange for cylinder mounting; 13. Bottom cover; 14. Lower mechanical seal; 15. Inlet; 16. Inner liner; 17. Inner rod; 18. Rotor body; 19. Outer rod; 20. Main separation hole; 21. Heat dissipation inner cylinder; 23. Internal support component; 24. Pressure plate; 25. Inner cylinder spiral water channel; 26. Water outlet pipe; 27. Water inlet pipe; 28. Discharge inner turbine; 29. ​​Pressure cover; 30. Secondary separation hole; 31. Inner liner heat dissipation spiral water channel; 32. Heat dissipation water outlet; 33. Heat dissipation water inlet; 34. Slag discharge port. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention will be further described below with reference to specific illustrations. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can be fixed connections, detachable connections, integral connections, mechanical connections, or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0023] Example

[0024] like Figures 1-5 The sand mill with a dual centrifugal separation structure shown includes a main shaft 1, a discharge channel 2 inside the main shaft 1, a discharge port 3 connected to the top of the main shaft 1, a discharge upper seal 4 connected to the upper end of the main shaft 1, a driven pulley 5 connected to the middle, and a bearing housing 6 rotatably connected to the lower end. A protective shell 7 is connected to the outside of the driven pulley 5 and the bearing housing 6. The discharge upper seal 4 is connected to the protective shell 7 through a seal mounting plate 8. The protective shell 7 can prevent foreign objects from entering and damaging the driven pulley 5 and the bearing housing 6, and can also prevent workers from accidentally touching the driven pulley 5 and causing damage during operation. In order to connect the driven pulley 5 to an external drive device, a connection port 9 is opened at the corresponding position of the protective shell 7 and the driven pulley 5.

[0025] The lower end of the main shaft 1 extends into the outer cylinder 10 and connects to the rotor and the discharge inner turbine assembly. The main shaft 1 can drive the rotor to perform grinding. The bottom of the main shaft 1 has a discharge hole 11, which is located inside the discharge inner turbine assembly. The ground material enters the discharge hole 11 after passing through the discharge inner turbine assembly, and is finally discharged from the discharge port 3 through the discharge channel 2. The top of the outer cylinder 10 is equipped with a cylinder mounting flange 12, and the bottom is connected to the bottom cover 13. A lower machine seal 14 is installed between the cylinder mounting flange 12 and the main shaft 1. The top of the cylinder mounting flange 12 is connected to the feed port 15. An inner liner assembly is installed inside the outer cylinder 10. The feed port 15 communicates with the inside of the inner liner assembly. The material to be ground can be put into the grinding chamber formed by the inner liner assembly and the rotor through the feed port 15. At the same time, the grinding beads in the grinding chamber can be replenished periodically. In order to prevent the temperature from getting too high when grinding the material, a heat dissipation inner cylinder assembly is provided below the discharge inner turbine assembly. The heat dissipation inner cylinder assembly can effectively dissipate the heat accumulated inside and prevent high temperature from affecting the grinding assembly.

[0026] like Figure 6 and Figure 7 As shown, the inner liner assembly includes an inner liner 16, which is a cylindrical structure with inner rods 17 installed on its inner wall; the rotor includes a rotor body 18, with the top of the rotor body 18 connected to the main shaft 1, and outer rods 19 connected to the side wall of the rotor body 18. The outer rods 19 and inner rods 17 on the outer side of the rotor body 18 are staggered. A main separation hole 20 is opened at the upper end of the rotor body 18, and the position of the main separation hole 20 corresponds to the position of the discharge inner turbine assembly; when grinding materials, the main shaft 1 drives the rotor body 18 to rotate, and the material is located between the inner liner 16 and the rotor body 18. The material is rapidly ground under the action of the outer rods 19, inner rods 17 and grinding beads. After grinding, the material is separated from the grinding beads through the main separation hole 20 and passes through the discharge inner turbine assembly before entering the discharge channel 2 for discharge.

[0027] like Figure 4 and Figure 5 As shown, the heat dissipation inner cylinder assembly includes a heat dissipation inner cylinder 21. The bottom of the heat dissipation inner cylinder 21 is in sealed contact with the bottom of the inner liner assembly. An internal support member 23 is connected to the inside of the heat dissipation inner cylinder 21. The internal support member 23 has a hollow structure and is connected to a bottom cover 13 at its bottom. A pressure plate 24 is connected to the top of the internal support member 23. The pressure plate 24 presses the heat dissipation inner cylinder 21 to prevent it from moving. A spiral water groove is installed on the outer wall of the internal support member 23. The spiral water groove and the heat dissipation inner cylinder 21 form an inner cylinder spiral water channel 25. The upper end of the inner cylinder spiral water channel 25 is connected to a water outlet pipe 26, and the lower end is connected to a water inlet pipe 27. The lower ends of the water outlet pipe 26 and the water inlet pipe 27 pass through the bottom cover 13. The water outlet pipe 26 and the water inlet pipe 27 are connected to an external liquid supply device. Cooling liquid enters the inner cylinder spiral water channel 25 for cooling.

[0028] like Figure 4 , Figure 5 and Figure 8 As shown, the discharge inner turbine assembly includes a discharge inner turbine 28. The bottom of the main shaft 1 is connected to the discharge inner turbine 28, and the top of the discharge inner turbine 28 is connected to a pressure cover 29. The pressure cover 29 is connected to the main shaft 1 to prevent the discharge inner turbine 28 from shaking. The discharge hole 11 is located inside the discharge inner turbine 28. The side wall of the discharge inner turbine 28 has a secondary separation hole 30. Through the secondary separation hole 30, the material after the rotor separates the grinding beads can be separated again, thereby realizing double centrifugal separation and making the separation effect better.

[0029] like Figure 4 , Figure 5 As shown, in order to reduce the temperature of the inner liner 16, an inner liner heat dissipation spiral water channel 31 is provided between the outer cylinder 10 and the inner liner 16. The upper and lower ends of the outer cylinder 10 are respectively connected to a heat dissipation outlet 32 ​​and a heat dissipation inlet 33. The heat dissipation outlet 32 ​​and the heat dissipation inlet 33 are connected to the inner liner heat dissipation spiral water channel 31. The heat dissipation outlet 32 ​​and the heat dissipation inlet 33 are connected to an external liquid supply device, and the cooling liquid enters the inner liner heat dissipation spiral water channel 31 for cooling.

[0030] A slag discharge port 34 is provided on one side of the bottom cover 13 inside the grinding chamber, through which residual impurities can be periodically discharged.

[0031] The process flow and working principle of this invention are as follows: When the grinding mill is in use, the material is fed into the outer cylinder 10 through the feed inlet 15 by the circulating feed pump, located between the inner liner 16 and the rotor body 18. The drive device drives the main shaft 1 to rotate through the driven pulley 5. The outer rods 19 and inner rods 17 push the grinding beads to run at high speed. Under the action of the grinding beads, the material is rapidly ground, which increases the collision frequency and impact speed between the material and the grinding beads. It also causes the material beads to undergo intense compression, friction, and shearing, resulting in mixing, emulsification, dispersion, kneading, and rolling. Because the grinding beads are heavier, they will fall downwards, causing the material to generate vertical convection in the pressurized grinding chamber. At the same time, under the pressure of the circulating feed pump, The pulverized microparticles enter the inner side of the rotor through the main separation hole 20 on the rotor. The rods distributed on the inner wall of the rotor continue to grind the particles and push the mixture of particles upwards until it reaches the turbine assembly in the discharge chamber. At the same time, a heat dissipation inner cylinder assembly is used to solve the problems of limited space, low centrifugal force, high flow rate, and concentrated heat in this area. After being separated by the main separation hole 20 of the rotor, the material passes through the secondary separation hole 30 on the side wall of the turbine 28 in the discharge chamber to completely separate the remaining grinding particles. Then, the material enters the discharge channel 2 through the discharge hole 11 and flows out through the discharge port 3, returning to the mixing cylinder. The material in the cylinder is returned to the grinding chamber by the circulating pump. This cycle continues until the usage requirements are met.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sand mill with a dual centrifugal separation structure, comprising a main shaft, characterized in that: The main shaft has an internal discharge channel, a discharge port connected to the top of the main shaft, a discharge upper seal connected to the upper end of the main shaft, a driven pulley connected to the middle of the main shaft, and a bearing housing rotatably connected to the lower end of the main shaft. The lower end of the main shaft extends into the outer cylinder and connects to the rotor and the discharge inner turbine assembly. A discharge hole is opened at the bottom of the main shaft, located inside the discharge inner turbine assembly. A cylinder mounting flange is installed at the top of the outer cylinder, and a bottom cover is connected to the bottom. An inner liner assembly is installed inside the outer cylinder. A heat dissipation inner cylinder assembly is located below the discharge inner turbine assembly. A feed inlet is connected to the top of the cylinder mounting flange and communicates with the interior of the inner liner assembly. The inner liner assembly includes an inner liner, which is a cylindrical structure with inner rods installed on its inner wall. A heat dissipation spiral water channel is provided between the outer cylinder and the inner liner. A heat dissipation outlet and a heat dissipation inlet are connected to the upper and lower ends of the outer cylinder, respectively, and these outlets communicate with the heat dissipation spiral water channel of the inner liner. The rotor includes a rotor body, with a main shaft connected to the top of the rotor body. External rods are connected to the sidewalls of the rotor body, and the external and internal rods on the outer wall of the rotor body are staggered. A main separation hole is opened at the upper end of the rotor body, and the position of the main separation hole corresponds to the position of the inner turbine assembly in the discharge section. The heat dissipation inner cylinder assembly includes a heat dissipation inner cylinder, the bottom of which is in sealed contact with the bottom of the inner liner assembly. An internal support member is connected to the inner side of the heat dissipation inner cylinder. The internal support member has a hollow structure and a bottom cover is connected to its bottom. A pressure plate is connected to the top of the internal support member, and the pressure plate presses the heat dissipation inner cylinder. A spiral water groove is installed on the outer wall of the internal support member, forming an inner cylinder spiral water channel between the spiral water groove and the heat dissipation inner cylinder. The upper end of the inner cylinder spiral water channel is connected to a water outlet pipe, and the lower end is connected to a water inlet pipe. The lower ends of the water outlet pipe and the water inlet pipe extend through the bottom cover. Rods are also distributed on the inner wall of the rotor body to continue grinding and push the mixture of material beads upwards until it reaches the inner turbine assembly in the discharge section.

2. The sand mill with a dual centrifugal separation structure according to claim 1, characterized in that: A lower mechanical seal is installed between the upper flange and the main shaft of the cylinder.

3. The sand mill with a dual centrifugal separation structure according to claim 1, characterized in that: The discharge inner turbine assembly includes a discharge inner turbine, the bottom of the main shaft is connected to the discharge inner turbine, the top of the discharge inner turbine is connected to a pressure cover, the pressure cover is connected to the main shaft, the discharge hole is located inside the discharge inner turbine, and a secondary separation hole is opened on the side wall of the discharge inner turbine.

4. The sand mill with a dual centrifugal separation structure according to claim 1, characterized in that: The passive pulley and the bearing housing are connected to a protective shell. The protective shell has a connection port at the corresponding position of the passive pulley. The discharge upper mechanical seal is connected to the protective shell through a mechanical seal mounting plate.

5. A sand mill with a dual centrifugal separation structure according to claim 1, characterized in that: A slag discharge port is opened on one side of the bottom cover.

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