High-efficiency sand mill

Abstract

The utility model relates to a high-efficiency sand mill which comprises a lifting upright post, a cross beam arranged at the top of the upright post, a motor and a main shaft which are arranged at two ends of the cross beam and are in transmission connection, a connecting rod fixedly arranged on the cross beam, a basket net arranged at the lower end of the connecting rod, a stirring rod arranged on the main shaft in the basket net, and convection paddles arranged at the end part of the main shaft below the basket net, a horn-shaped flow guide opening is formed in the upper end of the basket net, an annular flow guide groove wrapping the convection blades is formed in the lower end face of the basket net, a centrifugal wheel is installed on the portion, at the bottom of the inner side of the basket net, of the main shaft, and materials and grinding beads located in the center of the bottom of the basket net are thrown out through rotation of the centrifugal wheel. The grinding device is simple in structure, uniform in grinding particles and high in grinding efficiency.

Description

Technical Field

[0001] The utility model relates to a high-efficiency sand mill, belonging to the technical field of crushing equipment. Background Art

[0002] In the manufacturing process of products in industries such as coatings, inks, ceramics, pharmaceuticals, and food, grinders are often required to grind, mix, and disperse raw materials. Existing grinders are typically designed with a grinding body structure that generally has a rotating shaft on which are mounted an impeller and a stirring rod. The rotating shaft drives the stirring rod to rotate within a basket screen containing grinding beads. The grinding body structure is placed in a barrel containing material, and the rotation of the impeller and stirring rod is used to disperse and grind the material. This structural grinding device is unable to automatically circulate and grind raw materials with larger particles after grinding. The ground material particles are poorly uniform, the grinding time is long, and the grinding efficiency is low. At the same time, the bottom of the grinding basket near the rotating shaft is a stirring blind spot, where grinding beads are easily deposited, resulting in a significant reduction in the number of effective grinding beads, affecting the grinding quality and efficiency.

[0003] Therefore, there is an urgent need for a high-efficiency sand mill with simple structure, uniform grinding particles and high grinding efficiency. Summary of the Invention

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a high-efficiency sand mill with a simple structure, uniform grinding particles and high grinding efficiency.

[0005] The purpose of this utility model is achieved in this way:

[0006] A high-efficiency sand mill comprises a lifting column, a crossbeam installed on the top of the column, a motor and a main shaft arranged at both ends of the crossbeam and connected in transmission, a connecting rod fixedly mounted on the crossbeam, a basket installed at the lower end of the connecting rod, a stirring rod installed on the main shaft in the basket, a convection blade installed at the end of the main shaft below the basket, a trumpet-shaped guide port is provided at the upper end of the basket, an annular guide groove wrapping the convection blade is provided on the lower end surface of the basket, and a centrifugal wheel is installed on the main shaft at the inner bottom of the basket. The rotation of the centrifugal wheel throws out the material and grinding beads located at the center of the bottom of the basket.

[0007] Furthermore, the centrifugal blades of the centrifugal wheel have an outer edge height higher than an inner edge height.

[0008] Furthermore, a mounting seat is mounted on the main shaft, and the stirring rods are evenly distributed on the outer circumference of the mounting seat.

[0009] Furthermore, two sets of upper and lower mounting seats and corresponding stirring rods are arranged on the main shaft in the basket, and the centrifugal blades of the centrifugal wheel are arranged at the bottom of the lower mounting seat.

[0010] Furthermore, the basket net includes annular screens located around it and a screen plate located at the bottom; a copper sleeve is fixed at the center hole of the screen plate, and the main shaft is embedded in the copper sleeve to lubricate the main shaft. The upper edge of the copper sleeve is higher than the upper plane of the screen plate.

[0011] Furthermore, it also includes a box body, and the column is driven by a lifting cylinder arranged inside the column to perform a lifting action in the box body.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model provides trumpet-shaped guide ports and annular guide grooves at the top and bottom of the basket respectively. Driven by convection blades, a circulating convection is formed from top to bottom through the basket in the material barrel, which automatically draws all the materials in the barrel into the basket for grinding, effectively shortening the grinding time and improving the grinding uniformity and grinding efficiency. A centrifugal wheel is provided in the retention area at the bottom center of the basket to throw the material and grinding beads out for grinding, preventing leakage grinding and improving the grinding uniformity and grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a high-efficiency sand mill of the utility model.

[0015] Figure 2 This is an enlarged view of the grinding basket of a high-efficiency sand mill of the utility model.

[0016] Figure 3 This is a top view of a stirring rod of a high-efficiency sand mill according to the present invention.

[0017] Figure 4 This is a bottom view of the centrifugal wheel of a high-efficiency sand mill of the utility model.

[0018] Figure 5 This is a top view of the convection blades of a high-efficiency sand mill of the present invention.

[0019] in:

[0020] Column 1, crossbeam 2, motor 3, main shaft 4, connecting rod 5, basket 6, stirring rod 7, convection blade 8, guide port 9, guide groove 10, centrifugal wheel 11, box 12, material barrel 13, mounting base 14, annular screen 15, sieve plate 16, copper sleeve 17, lifting cylinder 18. DETAILED DESCRIPTION

[0021] See also Figures 1 to 5The utility model relates to a high-efficiency sand mill, comprising a box body 12, a column 1 arranged in a lifting manner in the box body 12, a crossbeam 2 installed on the top of the column 1, a motor 3 and a main shaft 4 arranged at both ends of the crossbeam 2 and connected in a transmission manner, a connecting rod 5 fixed to the crossbeam 2, and a basket 6 installed at the lower end of the connecting rod 5; the column 1 is driven by a lifting cylinder 18 arranged inside the column 1 to perform a lifting action in the box body 12;

[0022] The basket 6 includes an annular screen 15 located around it and a screen plate 16 located at the bottom; a copper sleeve 17 is fixedly installed at the center hole of the screen plate 16, and the main shaft 4 is embedded in the copper sleeve 17 to lubricate the main shaft 4. The upper edge of the copper sleeve 17 is higher than the upper plane of the screen plate 16. Grinding beads are placed in the basket 6. The copper sleeve 17, whose upper edge is higher than the screen plate 16, can effectively prevent the grinding beads and materials from directly contacting the main shaft 4, thereby protecting the main shaft 4;

[0023] Two sets of upper and lower mounting blocks 14 are mounted on the main shaft 4 within the basket 6. A plurality of stirring rods 7 are evenly distributed on the outer circumference of each set of mounting blocks 14. Convection blades 8 are mounted on the end of the main shaft 4 below the basket 6. A trumpet-shaped guide port 9 is provided at the upper end of the basket 6, and an annular guide groove 10 is provided on the lower end surface of the basket 6 to enclose the convection blades 8.

[0024] The main shaft 4 drives the stirring rod 7 and the convection blade 8 to rotate, and the convection blade 8 generates a downward suction force on the material, so that the material is sucked into the center of the basket 6 along the trumpet-shaped guide port 9, and is ground at high speed by the stirring rod 7 and the grinding beads in the basket 6. Part of the material flows out from the annular screen 15 around the basket 6, and part of the material flows out from the screen plate 16 and returns to the barrel through the convection blade 8. Large particles that do not pass through the screen holes continue to remain in the basket 6 for grinding. Due to the diversion and suction of the trumpet-shaped guide port 9, the annular guide groove 10 and the convection blade 8, the material forms an automatic circulating convection in the barrel 13, which accelerates the grinding speed and grinding uniformity of the material in the barrel 13, improves the grinding efficiency, and finally realizes the refinement of all material particles in a shorter time, and the material particle size is more uniform. At the same time, the fineness of the material can be adjusted by simply adjusting the size of the screen holes of the basket 6.

[0025] Because the material at the bottom of the basket 6 near the center of rotation of the main shaft 4 cannot be stirred by the stirring rod 7, a material retention area is formed. At the same time, the grinding beads that enter this area tend to gather in the retention area and no longer participate in grinding, reducing the overall grinding efficiency. Therefore, a centrifugal wheel 11 is installed on the main shaft 4 at the inner bottom of the basket 6, and the outer edge height of the centrifugal blades of the centrifugal wheel 11 is higher than the inner edge height. The rotation of the centrifugal wheel 11 will throw the material and grinding beads located in the retention area at the center of the bottom of the basket 6 outward. At the same time, the centrifugal blades with high outer edges form a barrier layer when rotating at high speed, preventing the material and grinding beads from entering the central retention area. In order to simplify the grinding structure, the centrifugal blades of the centrifugal wheel 11 can be directly installed on the bottom surface of the lower mounting seat 14, so that the centrifugal wheel 11 and the mounting seat 14 are combined into one. The high outer edges of the centrifugal blades and the raised portion of the copper sleeve 17 cooperate to throw the material and grinding beads in the retention area away, preventing leakage, improving grinding uniformity, and improving grinding efficiency.

[0026] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.

Claims

1. A high-efficiency sand mill, comprising a lifting column (1), a crossbeam (2) mounted on the top of the column (1), a motor (3) and a main shaft (4) arranged at both ends of the crossbeam (2) and connected in a transmission manner, a connecting rod (5) fixed to the crossbeam (2), a basket (6) mounted on the lower end of the connecting rod (5), a stirring rod (7) mounted on the main shaft (4) in the basket (6), and a convection blade (8) mounted on the end of the main shaft (4) below the basket (6), characterized in that: A trumpet-shaped guide port (9) is provided at the upper end of the basket (6), an annular guide groove (10) for wrapping the convection blade (8) is provided on the lower end surface of the basket (6), and a centrifugal wheel (11) is installed on the main shaft (4) at the bottom inner side of the basket (6). The rotation of the centrifugal wheel (11) throws the material and grinding beads located at the center of the bottom of the basket (6) outward.

2. The high-efficiency sand mill according to claim 1, characterized in that: The centrifugal blades of the centrifugal wheel (11) have an outer edge height higher than an inner edge height.

3. The high-efficiency sand mill according to claim 1, characterized in that: The main shaft (4) is fitted with a mounting seat (14), and the stirring rods (7) are evenly distributed on the outer circumference of the mounting seat (14).

4. The high-efficiency sand mill according to claim 3, characterized in that: Two sets of upper and lower mounting seats (14) and corresponding stirring rods (7) are arranged on the main shaft (4) in the basket (6), and the centrifugal blades of the centrifugal wheel (11) are arranged at the bottom of the lower mounting seat (14).

5. The high-efficiency sand mill according to claim 1, characterized in that: The basket (6) comprises an annular screen (15) located around it and a screen plate (16) located at the bottom; a copper sleeve (17) is fixed at the center hole of the screen plate (16), and the main shaft (4) is embedded in the copper sleeve (17) to lubricate the main shaft (4); the upper edge of the copper sleeve (17) is higher than the upper plane of the screen plate (16).

6. The high-efficiency sand mill according to claim 1, characterized in that: It also includes a box body (12), and the column (1) is driven by a lifting oil cylinder (18) arranged inside the column to perform a lifting action in the box body (12).

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