Horizontal low-temperature dry grinding system

Abstract

The utility model relates to a horizontal low-temperature dry grinding system which comprises a main machine head, a spiral feeding device is installed at one end of the main machine head, a dry grinding system is installed at the end, away from the main machine head, of the spiral feeding device, and a discharging pipe is fixedly connected to the top of the end, close to the main machine head, of the spiral feeding device. The two sides of the top of the discharging pipe are each fixedly connected with a conveying pipe with one end communicated with the interior of the discharging pipe, when special materials need to be ground, a ball valve can be opened, the rotating speed of two servo motors can be adjusted, augers in the two conveying pipes convey the materials and dry ice stored in the two storage tanks into the discharging pipe at different rotating speeds, and then the materials and the dry ice are conveyed into the discharging pipe. And the materials are guided into the first outer barrel along the discharging pipe, the materials and the dry ice are mixed while the materials are pushed into the silicon carbide inner container through the spiral push rod, accurate metering and low-temperature treatment of the materials are achieved, the grinding temperature can be effectively controlled, and heat-sensitive materials are prevented from being denatured.

Description

Technical Field

[0001] This utility model belongs to the technical field of dry grinding machines, specifically relating to a horizontal low-temperature dry grinding system. Background Technology

[0002] A dry grinding mill is a device that grinds materials using a dry method. It is a key piece of equipment for further pulverizing materials after they have been crushed. This machine has a direct-drive structure, which features high transmission torque, high mechanical efficiency, and smooth start-up, and eliminates the hassle of frequent transmission adjustments.

[0003] Traditional dry grinding mills generally use gravity-feeding, which leads to chaotic and uncontrollable material ratios and makes it difficult to pre-cool and protect special materials, resulting in heat buildup and sticking of materials. Utility Model Content

[0004] The purpose of this utility model is to provide a horizontal low-temperature dry grinding system with a simple structure and reasonable design in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A horizontal low-temperature dry grinding system includes a main head, one end of which is equipped with a screw feeding device. The end of the screw feeding device away from the main head is equipped with a dry grinding system. A feed pipe is fixedly connected to the top of the end of the screw feeding device near the main head. A conveying pipe with one end communicating with the inside of the feed pipe is fixedly connected to both sides of the top of the feed pipe. An auger is installed inside the conveying pipe. A servo motor for driving the auger to rotate is installed on the free ends of the two conveying pipes. A storage tank is connected to the middle section of the two conveying pipes through a pipe. A ball valve is installed on the middle section of the two pipes.

[0007] As a further optimization of this utility model, the screw feeding device includes a first outer cylinder body fixedly connected to the main machine head via a front flange. A main shaft is inserted through the first outer cylinder body. One end of the main shaft near the main machine head passes through the main machine head and is fixed to an external drive device. A screw push rod is fixedly sleeved on a section of the main shaft located in the inner cavity of the first outer cylinder body.

[0008] As a further optimization of this utility model, a mechanical seal is fitted on the main shaft inside the front flange, the inner ring of the mechanical seal is rotatably connected to the main shaft, and the outer ring of the mechanical seal is fixed to the main head.

[0009] As a further optimization of this utility model, the dry grinding system includes a second outer cylinder fixedly connected to the free end of the first outer cylinder, and one end of the main shaft near the second outer cylinder extends into the second outer cylinder. Multiple annularly distributed rotors are fixedly connected to a section of the main shaft located in the inner cavity of the second outer cylinder.

[0010] As a further optimization of this utility model, a silicon carbide inner liner with a tubular structure is provided in the inner cavity of the second outer cylinder, and a gap is left between the inner wall of the silicon carbide inner liner and the end of the rotor.

[0011] As a further optimization of this utility model, a discharge nozzle is provided at the end of the second outer cylinder away from the first outer cylinder, a rear flange is fixedly connected to the discharge nozzle, and a discharge fixing plate is fixedly connected at the end of the second outer cylinder close to the rear flange.

[0012] As a further optimization of this utility model, a discharge screen is installed inside the discharge fixing plate. The discharge screen uses V-shaped screen bars arranged to form a wedge-shaped mesh, and the mesh is narrower at the top and wider at the bottom.

[0013] As a further optimization of this utility model, two vibration motors are fixedly installed on the outer wall of the discharge nozzle, and the two vibration motors are arranged symmetrically.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. When grinding special materials, the ball valve can be opened and the speed of the two servo motors can be adjusted so that the screw conveyors in the two conveying pipes can transport the materials and dry ice stored in the two storage tanks to the discharge pipe at different speeds. The materials are then guided into the first outer cylinder through the discharge pipe. The material is pushed into the silicon carbide inner liner by the spiral pusher while the material and dry ice are mixed. This achieves accurate metering and low-temperature treatment of the material, effectively controls the grinding temperature, and prevents the denaturation of heat-sensitive materials.

[0016] 2. The multi-head spiral pusher installed inside the first outer cylinder can ensure that the material is pushed at a uniform speed and avoid material accumulation. The two vibrating motors fixedly installed on the outer wall of the discharge nozzle can drive the discharge nozzle to vibrate at high frequency when discharging, which not only further improves the discharge efficiency of powder, but also prevents the powder from sticking to the inner wall of the discharge nozzle. Attached Figure Description

[0017] Figure 1 This is a structural diagram of one side of the entire utility model;

[0018] Figure 2 This is a schematic diagram of the other side of the overall structure of this utility model;

[0019] Figure 3This is a utility model Figure 1 Left view of the overall structure;

[0020] Figure 4 This is a utility model Figure 1 A schematic diagram of the cross-sectional structure;

[0021] Figure 5 This is a three-dimensional structural diagram of the discharge screen of this utility model.

[0022] In the diagram: 1. Main unit head; 2. Front flange; 3. Mechanical seal; 4. Main shaft; 5. Screw pusher; 6. First outer cylinder; 7. Discharge fixing plate; 8. Second outer cylinder; 9. Rear flange; 10. Silicon carbide inner liner; 11. Discharge screen; 12. Discharge nozzle; 13. Servo motor; 14. Storage tank; 15. Ball valve; 16. Screw; 17. Rotor; 18. Conveying pipe; 19. Vibrating motor. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] Example

[0025] like Figure 1 - Figure 5 As shown, a horizontal low-temperature dry grinding system includes a main head 1, with a screw feeding device installed at one end of the main head 1. The screw feeding device includes a first outer cylinder 6 fixedly connected to the main head 1 via a front flange 2. The front flange 2 greatly improves the installation stability of the first outer cylinder 6.

[0026] A main shaft 4 is installed inside the first outer cylinder 6. One end of the main shaft 4 near the main head 1 passes through the main head 1 and is fixed to the external drive device. A spiral push rod 5 is fixedly sleeved on a section of the main shaft 4 located in the inner cavity of the first outer cylinder 6. When the main shaft 4 is driven to rotate by the external drive device, the main shaft 4 can synchronously drive the spiral push rod 5 to rotate, thereby pushing the material.

[0027] A mechanical seal 3 is fitted on the main shaft 4 inside the front flange 2. The inner ring of the mechanical seal 3 is rotatably connected to the main shaft 4, and the outer ring of the mechanical seal 3 is fixed to the main head 1. The mechanical seal 3 can effectively prevent materials from entering the main head 1.

[0028] A dry grinding system is installed at the end of the screw feeding device away from the main head 1. The dry grinding system includes a second outer cylinder 8 that is fixedly connected to the free end of the first outer cylinder 6. The end of the main shaft 4 near the second outer cylinder 8 extends into the second outer cylinder 8. Multiple annularly distributed rotors 17 are fixedly connected to a section of the main shaft 4 located in the inner cavity of the second outer cylinder 8. When the main shaft 4 drives the screw push rod 5 to rotate and convey material into the second outer cylinder 8, it can drive the rotors 17 to rotate synchronously. The friction and collision between the rotors 17 and the material during rotation are used to grind the material.

[0029] The top of the screw feeding device near the main head 1 is fixedly connected to a feeding pipe. Both sides of the top of the feeding pipe are fixedly connected to a conveying pipe 18, one end of which communicates with the inside of the feeding pipe. An auger 16 is installed inside the conveying pipe 18. A servo motor 13 for driving the auger 16 to rotate is installed on the free ends of the two conveying pipes 18. The two servo motors 13 can be controlled to rotate at different speeds, and the two conveying pipes 18 can be used to convey materials separately, so as to adjust the ratio of materials conveyed by the two conveying pipes 18.

[0030] Both conveying pipes 18 are connected to storage tanks 14 via pipes in the middle section. One storage tank 14 is used to hold materials, and the other storage tank 14 is used to hold dry ice. Ball valves 15 are installed in the middle section of both pipes. When the ball valves 15 are opened, the materials and dry ice can be conveyed into the discharge pipe at a constant speed and in an adjustable ratio, and then conveyed into the first outer cylinder 6 under the action of gravity.

[0031] The second outer cylinder 8 is provided with a discharge nozzle 12 at the end away from the first outer cylinder 6 for discharging the ground material. A rear flange 9 is fixedly connected to the discharge nozzle 12. A discharge fixing plate 7 is fixedly connected to the end of the second outer cylinder 8 near the rear flange 9, so that the discharge nozzle 12 is fixed to the second outer cylinder 8 through the rear flange 9 and the discharge fixing plate 7.

[0032] The discharge screen 11 is installed inside the discharge fixing plate 7. The discharge screen 11 uses V-shaped screen bars arranged to form a wedge-shaped mesh, and the mesh is narrow at the top and wide at the bottom, making it easier for material particles to pass through the gap, thereby greatly improving the material discharge efficiency.

[0033] Two vibration motors 19 are fixedly installed on the outer wall of the discharge nozzle 12. The two vibration motors 19 are symmetrically arranged. When feeding, the vibration motors 19 can be started to drive the discharge nozzle 12 to vibrate at high frequency. This not only further improves the discharge efficiency of powder, but also prevents the powder from sticking to the inner wall of the discharge nozzle 12.

[0034] It should be noted that, in use, this horizontal low-temperature dry grinding system involves adjusting the speeds of the two servo motors 13 and opening the ball valve 15, allowing the materials and dry ice stored in the two storage tanks 14 to fall into the two conveying pipes 18 respectively. At this time, the servo motors 13 drive the two screw conveyors 16 to rotate at different speeds, conveying the appropriate proportion of dry ice and materials along the two conveying pipes 18 to the discharge pipe. After entering the discharge pipe, the materials and dry ice fall into the first outer cylinder 6 under their own gravity. At this point, the main shaft 4 is driven to rotate by an external drive device. When the main shaft 4 rotates, it can synchronously drive the spiral push rod 5 to rotate, pushing the material into the second outer cylinder 8. At the same time, it can mix the dry ice and the material, and use the low temperature dry ice to pre-cool the material. Meanwhile, the rotation of the main shaft 4 can also drive the rotor 17 to rotate, which will cause violent collision with the grinding media filled in the silicon carbide inner liner 10. In this process, shearing force, impact force and extrusion force are generated to grind the material pushed into the silicon carbide inner liner 10. The material ground to a suitable size finally passes through the discharge screen 11 and is discharged from the discharge nozzle 12.

[0035] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A horizontal low-temperature dry grinding system, comprising a main head (1), wherein a screw feeding device is installed at one end of the main head (1), and a dry grinding system is installed at the end of the screw feeding device away from the main head (1), characterized in that: A feed pipe is fixedly connected to the top of the screw feeder near the main head (1). A conveying pipe (18) with one end communicating with the inside of the feed pipe is fixedly connected to both sides of the top of the feed pipe. An auger (16) is installed inside the conveying pipe (18). A servo motor (13) for driving the auger (16) to rotate is installed on the free ends of the two conveying pipes (18). A storage tank (14) is connected to the middle section of the two conveying pipes (18) through a pipe. A ball valve (15) is installed on the middle section of the two pipes.

2. The horizontal low-temperature dry grinding system according to claim 1, characterized in that: The screw feeding device includes a first outer cylinder (6) fixedly connected to the main machine head (1) via a front flange (2). A main shaft (4) is inserted inside the first outer cylinder (6). One end of the main shaft (4) near the main machine head (1) passes through the main machine head (1) and is fixed to an external drive device. A screw push rod (5) is fixedly sleeved on a section of the main shaft (4) located in the inner cavity of the first outer cylinder (6).

3. The horizontal low-temperature dry grinding system according to claim 2, characterized in that: A mechanical seal (3) is fitted on the main shaft (4) inside the front flange (2). The inner ring of the mechanical seal (3) is rotatably connected to the main shaft (4), and the outer ring of the mechanical seal (3) is fixed to the main head (1).

4. The horizontal low-temperature dry grinding system according to claim 2, characterized in that: The dry grinding system includes a second outer cylinder (8) fixedly connected to the free end of the first outer cylinder (6). One end of the main shaft (4) near the second outer cylinder (8) extends into the second outer cylinder (8). A plurality of annularly distributed rotors (17) are fixedly connected to a section of the main shaft (4) located in the inner cavity of the second outer cylinder (8).

5. A horizontal low-temperature dry grinding system according to claim 4, characterized in that: The inner cavity of the second outer cylinder (8) is provided with a silicon carbide inner liner (10) with a tubular structure, and a gap is left between the inner wall of the silicon carbide inner liner (10) and the end of the rotor (17).

6. The horizontal low-temperature dry grinding system according to claim 4, characterized in that: The second outer cylinder (8) is provided with a discharge nozzle (12) at the end away from the first outer cylinder (6), and a rear flange (9) is fixedly connected to the discharge nozzle (12). The second outer cylinder (8) is fixedly connected with a discharge fixing plate (7) at the end near the rear flange (9).

7. A horizontal low-temperature dry grinding system according to claim 6, characterized in that: The discharge fixing plate (7) is equipped with a discharge screen (11). The discharge screen (11) uses V-shaped screen bars arranged to form a wedge-shaped mesh, and the mesh is narrow at the top and wide at the bottom.

8. A horizontal low-temperature dry grinding system according to claim 6, characterized in that: Two vibration motors (19) are fixedly installed on the outer wall of the discharge nozzle (12), and the two vibration motors (19) are arranged symmetrically.

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