Double-rotor grinding device

Abstract

The utility model discloses a double-rotor grinding device which comprises a grinding cylinder, a cylinder cover is installed at the upper end of the grinding cylinder, a grinding rotating shaft is rotatably installed on the cylinder cover, the upper half portion of the grinding rotating shaft is of a hollow structure, and a discharging port is further formed in the grinding rotating shaft. The screening mechanism is mounted on the grinding rotating shaft and is used for screening the ground materials; the screening mechanism comprises a screening base installed on the grinding rotating shaft, a screening cover plate is further installed on the grinding rotating shaft, and a screen is installed between the screening cover plate and the screening base. The upper rotor assembly is mounted in the middle of the grinding rotating shaft and used for grinding materials; and the lower rotor assembly is mounted at the lower half part of the grinding rotating shaft and is used for grinding materials. The grinding device is simple in structure, can effectively prevent the materials which are not fully ground from being discharged, can effectively improve the grinding effect, and can better meet the use requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding equipment, in particular to a double-rotor grinding device. Background Art

[0002] Sand mill is the most widely adaptable, most advanced and most efficient grinding equipment. It has the narrowest grinding chamber, the smallest lever gap and the most intensive grinding energy. With high-performance cooling system and automatic control system, it can realize continuous processing and discharging of materials, greatly improving production efficiency. Traditional grinding machines generally consist of a grinding cylinder with a grinding chamber formed inside and a grinding rotor inside the grinding cylinder. The grinding rotor is simply provided with protrusions such as nails, which has the problem of low grinding efficiency.

[0003] In order to solve the above problems, the utility model patent with authorization announcement number CN215312816U discloses a vertical double-dispersion disc grinder. The device adopts a combined dispersion disc to replace the traditional rod nails. The material and the grinding medium enter from the first through hole of the first dispersion disc and the second through hole of the second dispersion disc. Then, under the action of rotating centrifuge, the material quickly passes through the turbine material channel composed of the upper surface of the first dispersion disc, the lower surface of the second dispersion disc and the arc-shaped blades, and a strong collision occurs, thereby achieving the effect of refining the material, which can significantly improve the grinding efficiency.

[0004] However, when the device is used, the separator is open, which may cause some insufficiently ground materials to enter the separator from above, then enter the discharge pipe and then be discharged, thereby reducing the grinding effect of the material and failing to meet the use requirements. Utility Model Content

[0005] The purpose of the utility model is to provide a dual-rotor grinding device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A double-rotor grinding device comprises: a grinding cylinder, a cylinder cover is installed on the upper end of the grinding cylinder, a grinding rotating shaft is rotatably installed on the cylinder cover, the upper half of the grinding rotating shaft is a hollow structure, and a discharge port is also opened on the grinding rotating shaft; a screening mechanism is installed on the grinding rotating shaft and is used to screen the ground material; the screening mechanism comprises a screening base installed on the grinding rotating shaft, a screening cover is also installed on the grinding rotating shaft, and a screen is installed between the screening cover and the screening base; an upper rotor assembly is installed in the middle of the grinding rotating shaft and is used to grind the material; a lower rotor assembly is installed in the lower half of the grinding rotating shaft and is used to grind the material.

[0008] As a further solution, the screening cover plate and the screening base are distributed on the upper and lower sides of the discharge port.

[0009] As a further solution, the upper rotor assembly includes an upper rotor mounted on a grinding rotating shaft, multiple groups of upper rod pins 1 are distributed and installed on the outer side of the upper rotor, multiple groups of mounting rings are distributed and installed on the inner wall of the grinding cylinder, and multiple groups of upper rod pins 2 are installed on each mounting ring.

[0010] As a further solution, the upper rod pin 1 and the upper rod pin 2 are staggeredly distributed.

[0011] As a further solution, a positioning strip is provided on the inner side of the upper rotor, a positioning groove is provided at a corresponding position of the grinding rotating shaft, and the positioning strip is inserted into the positioning groove.

[0012] As a further solution, the lower rotor assembly includes a lower rotor inserted in the lower half of the grinding rotating shaft, a plurality of positioning columns are installed on the lower rotor, the positioning columns are inserted in the positioning holes at the lower end of the grinding rotating shaft, and the lower rotor is fixed to the grinding rotating shaft by fixing bolts; a plurality of through holes are distributed on the lower rotor, a plurality of lower rod pins 1 are distributed and installed on the inner side of the lower rotor, a mounting column is also installed at the bottom of the grinding cylinder, a plurality of lower rod pins 2 are distributed and installed on the mounting column, and the lower rod pins 2 are staggered with the lower rod pin 1.

[0013] As a further solution, a feed pipe is also installed on the side wall of the lower half of the grinding cylinder.

[0014] As a further solution, a pulley is installed on the upper half of the grinding rotating shaft.

[0015] Compared with the prior art, the utility model has the following beneficial effects: by setting the screen, the ground material can pass through the screen to enter the discharge port, so that the ground material is transferred out, and the insufficiently ground material cannot pass through the screen, thereby ensuring that the material is fully ground in the grinding cylinder, improving the grinding effect, and the screening cover plate cooperates with the screening base to effectively prevent the insufficiently ground material from being discharged from the discharge port. The utility model has a simple structure, can effectively prevent the insufficiently ground material from being discharged, can effectively improve the grinding effect, and can better meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a dual-rotor grinding device;

[0017] Figure 2 It is a schematic cross-sectional structure diagram of a dual-rotor grinding device;

[0018] Figure 3 A schematic diagram of the three-dimensional structure of the upper rotor position of a dual-rotor grinding device;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the upper rod pin in two positions of a dual-rotor grinding device;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the lower rotor position of a dual-rotor grinding device;

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the lower rod pin in two positions of a dual-rotor grinding device;

[0022] Figure 7 The figure is a schematic diagram of the exploded structure of the screening mechanism of a double-rotor grinding device.

[0023] In the figure: 1-grinding cylinder, 11-cylinder cover, 12-grinding rotating shaft, 121-discharge port, 13-rotating joint, 14-pulley, 15-feed pipe, 2-screening mechanism, 21-screening base, 22-screen, 23-screening cover, 24-positioning piece, 3-upper rotor assembly, 31-upper rotor, 311-positioning bar, 32-upper rod pin one, 33-mounting ring, 331-upper rod pin two, 4-lower rotor assembly, 41-lower rotor, 42-through hole, 43-positioning column, 44-fixing bolt, 45-lower rod pin one, 46-mounting column, 461-lower rod pin two. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example: See Figures 1 to 7A double-rotor grinding device comprises: a grinding cylinder 1, a cylinder cover 11 is installed on the upper end of the grinding cylinder 1, a grinding rotating shaft 12 is rotatably installed on the cylinder cover 11, the upper half of the grinding rotating shaft 12 is a hollow structure, and a discharge port 121 is also opened on the grinding rotating shaft 12; a screening mechanism 2 is installed on the grinding rotating shaft 12, and is used to screen the ground material; the screening mechanism 2 comprises a screening base 21 installed on the grinding rotating shaft 12, and a screening cover 23 is also installed on the grinding rotating shaft 12, a screen 22 is installed between the screening cover 23 and the screening base 21, and a positioning piece 24 at the lower end of the screening cover 23 is inserted on the screening base 21, and the screen 22 is strip-shaped and wound around the screening cover 2 3 and the outside of the screening base 21; the upper rotor assembly 3 is installed in the middle of the grinding rotating shaft 12, and is used to grind the material; the lower rotor assembly 4 is installed in the lower half of the grinding rotating shaft 12, and is used to grind the material. In this embodiment, the screening cover 23 and the screening base 21 are distributed on the upper and lower sides of the discharge port 121, and the side wall of the lower half of the grinding cylinder 1 is also installed with a feed pipe 15, and the upper half of the grinding rotating shaft 12 is installed with a pulley 14. By setting the pulley 14, it is convenient for an external driving assembly to cooperate with the belt to drive the grinding rotating shaft 12 to rotate. A rotary joint 13 is also installed on the upper end of the grinding rotating shaft, and the other end of the rotary joint 13 is connected to an external negative pressure device to facilitate the transfer of the ground material.

[0026] The working principle of the utility model is as follows: when in use, materials are added into the grinding cylinder 1 through the feed pipe 15, and then the grinding rotating shaft 12 is driven to rotate through the external driving component, thereby driving the upper rotor component 3 and the lower rotor component 4 to rotate, and the grinding medium in the grinding cylinder 1 is cooperated to grind the materials. At the same time, the external negative pressure device works, and the ground materials are filtered through the screen 22, so that the ground materials are transferred out, and the materials that are not fully ground cannot pass through the screen 22, thereby ensuring that the materials are fully ground in the grinding cylinder 1 and improving the grinding effect.

[0027] As a further solution, the lower rotor assembly 4 includes a lower rotor 41 inserted in the lower half of the grinding rotating shaft 12, and multiple groups of positioning columns 43 are installed on the lower rotor 41. The positioning columns 43 are inserted in the positioning holes at the lower end of the grinding rotating shaft 12, and the lower rotor 41 is fixed to the grinding rotating shaft 12 by fixing bolts 44; multiple groups of through holes 42 are distributed on the lower rotor 41, and multiple groups of lower rod pins 45 are distributed on the inner side of the lower rotor 41. The bottom of the grinding cylinder 1 is also installed with a mounting column 46, and multiple groups of lower rod pins 461 are distributed on the mounting column 46, and the lower rod pins 461 are staggered with the lower rod pins 45.

[0028] The working principle of the lower rotor assembly 4 is: the lower rotor 41 is driven to rotate by the grinding rotating shaft 12, and part of the material enters the lower rotor 41 through the through hole 42. At this time, the material can be initially ground by the lower rod pin 1 45 and the lower rod pin 2 461 in cooperation with the grinding medium.

[0029] As a further solution, the upper rotor assembly 3 includes an upper rotor 31 mounted on the grinding rotating shaft 12, and multiple groups of upper rod pins 32 are distributed and installed on the outer side of the upper rotor 31, and multiple groups of mounting rings 33 are distributed and installed on the inner wall of the grinding cylinder 1, and multiple groups of upper rod pins 331 are installed on each of the mounting rings 33, and the upper rod pins 32 and the upper rod pins 331 are staggered. In order to improve the stability of the upper rotor 31, a positioning bar 311 is provided on the inner side of the upper rotor 31, and a positioning groove is opened at the corresponding position of the grinding rotating shaft 12, and the positioning bar 311 is inserted into the positioning groove.

[0030] The working principle of the upper rotor assembly 3 is: the mass of the material after preliminary grinding by the lower rotor assembly 4 is reduced, and under the action of the negative pressure device and the grinding rotating shaft 12, the material rises to the upper rotor 31. At this time, the upper rod pin 1 32 and the upper rod pin 2 331 cooperate with the grinding medium to further grind the material and improve the grinding effect of the material. Compared with the lower rotor assembly 4, the upper rod pin 1 32 has a larger linear velocity, thereby having a larger shear force, which can further improve the grinding effect.

[0031] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

Claims

1. A twin-rotor grinding device, characterized in that: include: A grinding cylinder (1), wherein a cylinder cover (11) is mounted on the upper end of the grinding cylinder (1), a grinding rotating shaft (12) is rotatably mounted on the cylinder cover (11), the upper half of the grinding rotating shaft (12) is a hollow structure, and a discharge port (121) is also provided on the grinding rotating shaft (12); A screening mechanism (2) is mounted on the grinding rotating shaft (12) and is used to screen the ground material; The screening mechanism (2) comprises a screening base (21) mounted on a grinding rotating shaft (12), a screening cover plate (23) also mounted on the grinding rotating shaft (12), and a screen (22) mounted between the screening cover plate (23) and the screening base (21); An upper rotor assembly (3) is mounted in the middle of the grinding rotating shaft (12) and is used to grind the material; The lower rotor assembly (4) is mounted on the lower half of the grinding rotating shaft (12) and is used to grind materials.

2. A dual-rotor grinding device according to claim 1, characterized in that: The screening cover plate (23) and the screening base (21) are distributed on the upper and lower sides of the discharge port (121).

3. A dual-rotor grinding device according to claim 2, characterized in that: The upper rotor assembly (3) comprises an upper rotor (31) sleeved on a grinding rotating shaft (12), a plurality of groups of upper rod pins (32) are distributed and installed on the outer side of the upper rotor (31), a plurality of groups of mounting rings (33) are distributed and installed on the inner wall of the grinding cylinder (1), and each of the mounting rings (33) is installed with a plurality of groups of upper rod pins (331).

4. A dual-rotor grinding device according to claim 3, characterized in that: The upper rod pin one (32) and the upper rod pin two (331) are distributed in a staggered manner.

5. A dual-rotor grinding device according to claim 4, characterized in that: A positioning strip (311) is provided on the inner side of the upper rotor (31), a positioning groove is provided at a corresponding position of the grinding rotating shaft (12), and the positioning strip (311) is inserted into the positioning groove.

6. A dual-rotor grinding device according to claim 5, characterized in that: The lower rotor assembly (4) comprises a lower rotor (41) inserted in the lower half of the grinding rotating shaft (12), a plurality of positioning columns (43) are installed on the lower rotor (41), the positioning columns (43) are inserted in positioning holes at the lower end of the grinding rotating shaft (12), and the lower rotor (41) is fixed to the grinding rotating shaft (12) by fixing bolts (44); The lower rotor (41) is provided with a plurality of through holes (42), the inner side of the lower rotor (41) is provided with a plurality of lower rod pins (45), the bottom of the grinding cylinder (1) is further provided with a mounting column (46), the mounting column (46) is provided with a plurality of lower rod pins (461), and the lower rod pins (461) are arranged in an alternating manner with the lower rod pins (45).

7. A dual-rotor grinding device according to claim 6, characterized in that: A feed pipe (15) is also installed on the side wall of the lower half of the grinding cylinder (1).

8. A dual-rotor grinding device according to claim 7, characterized in that: A pulley (14) is installed on the upper half of the grinding rotating shaft (12).

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