Feeding mechanism for jet mill

Abstract

The application provides an air flow pulverizer feeding mechanism, which comprises a container, a screw conveyor is arranged at the bottom of the container, a first pipeline is arranged at the bottom of the screw conveyor and away from the container, a movable plate is slidably arranged on the container, the movable plate extends to the outside of the container at both ends, and a rubber pad is arranged on the contact surface between the container and the movable plate. The raw material is put into the container from the top of the container, and a driving unit is started at the same time. The driving unit drives the cam to rotate. During the rotation of the cam, when the protruding end of the cam extrudes the fixed plate, the fixed plate drives the movable plate to move at this time, and the elastic assembly is extruded to deform at the same time. When the protruding end of the cam is away from the fixed plate, the elastic assembly is reset at this time, and the movable plate is reset. Thus, the movable plate is repeatedly moved to screen the raw material, so that the large-size raw material is prevented from entering the pulverizer, and the raw material is affected by vibration to disperse part of the balled raw material.

Description

Technical Field

[0001] This invention relates to the field of biomaterial processing technology, and in particular to a feeding mechanism for an airflow pulverizer. Background Technology

[0002] In biomaterial processing, air jet mills are commonly used for pulverization, ensuring particle fineness while avoiding damage to raw material properties from high temperatures. During operation, raw materials enter the conveying mechanism via a feed hopper, are then transported to the feed pipe, and finally fall into the mill under gravity. However, raw materials are prone to agglomeration during storage and transport. Agglomerated materials, due to their large size, are difficult to pulverize by the airflow and accumulate inside the mill, hindering subsequent pulverization and reducing efficiency. Simultaneously, as raw materials flow through the feed pipe, some adhere to the pipe's inner wall, reducing flow and potentially causing blockages. Therefore, a device is needed to address these issues. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the existing technology. The present invention proposes a feeding mechanism for an airflow pulverizer.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A feeding mechanism for an airflow pulverizer includes: a container with a screw conveyor installed at its bottom and a first pipe installed on the bottom of the screw conveyor away from the container; a movable plate slidably mounted on the container, with both ends of the movable plate extending movably to the outside of the container; rubber pads installed on the contact surface between the container and the movable plate to seal the contact position between the movable plate and the container; and a screen installed at the center of the movable plate for screening raw materials; two fixed plates, respectively installed at both ends of the movable plate; a power mechanism installed on the container to drive the movable plate to move; the power mechanism includes a drive unit and a cam, the cam being tightly attached to the fixed plate, and the drive unit driving the cam to rotate; and a reset mechanism installed between the fixed plates and the container for resetting the movable plate; the reset mechanism includes an elastic component, which is a first spring.

[0005] Preferably, it also includes a door panel installed on the container, the removable door panel being used for cleaning the top of the movable panel.

[0006] Preferably, the container also includes guide blocks symmetrically installed inside the container. The guide blocks have a triangular cross-section and their bottoms are in close contact with the top of the movable plate. The guide blocks are used to guide the raw materials onto the screen of the movable plate.

[0007] Preferably, the power mechanism further includes a support plate mounted on the container, the drive unit is mounted on the support plate, and the support plate is used to support the drive unit.

[0008] Preferably, the screw conveyor includes a housing, a motor, and an auger; the motor is mounted on the housing, and the auger is rotatably mounted inside the housing; the output end of the motor is fixedly connected to the auger, and the motor is used to drive the auger to rotate for transporting raw materials.

[0009] Preferably, the reset mechanism further includes a telescopic rod installed between the fixed plate and the container, with a first spring sleeved on the outside of the telescopic rod to prevent the first spring from bending during compression deformation.

[0010] Preferably, it also includes a first solenoid valve installed on the first pipeline, and at least two first solenoid valves are provided, which divide the first pipeline into three parts.

[0011] Preferably, the system further includes a second pipe installed on the first pipe, the second pipe being inclined downwards and extending into the interior of the first pipe; a second solenoid valve installed on the second pipe for controlling the opening and closing of the second pipe; a gas storage assembly installed at the top of the second pipe for storing gas; a third pipe installed at the top of the gas storage assembly; a first one-way valve installed on the third pipe to prevent airflow from escaping upwards from the third pipe; and a gas injection assembly installed at the top of the third pipe for injecting gas into the third pipe.

[0012] Preferably, the gas storage assembly includes a fixing strip installed between the second pipe and the third pipe, wherein a plurality of fixing strips are arranged in a ring and there are gaps between the fixing strips; and further includes a rubber airbag installed between the second pipe and the third pipe.

[0013] Preferably, the air injection assembly includes a hollow cylinder mounted on a third pipe; a piston block is slidably mounted inside the hollow cylinder; a sleeve is also mounted outside the hollow cylinder, with a column at the bottom of the sleeve supporting the hollow cylinder; a second one-way valve is mounted on the top of the hollow cylinder near the third pipe, allowing external air to enter the hollow cylinder; a transmission rod is mounted on the piston block away from the third pipe, the transmission rod being tightly attached to a fixed plate; a fixing ring is also mounted outside the transmission rod; a second spring is installed between the fixing ring and the hollow cylinder, the second spring being sleeved on the outside of the transmission rod.

[0014] Compared with the prior art, the beneficial effects of the present invention include: 1. Raw materials are fed into the container from the top, and the drive unit is started at the same time. The drive unit drives the cam to rotate. During the rotation of the cam, when the cam protrusion presses against the fixed plate, the fixed plate drives the movable plate to move and presses the elastic component, causing the elastic component to deform. When the cam protrusion moves away from the fixed plate, the elastic component resets and drives the movable plate to reset. In this way, the movable plate moves repeatedly to screen the raw materials and prevent large-volume raw materials from entering the crusher. At the same time, the vibration of the raw materials can break up some of the clumps.

[0015] 2. The first solenoid valve opens simultaneously with the second solenoid valve, while the top solenoid valve closes. The raw material accumulated on the bottom solenoid valve is fed into the crusher through the first pipe, achieving quantitative feeding. During the feeding process, air from inside the rubber airbag rushes into the first pipe when the second solenoid valve opens. The airflow impact helps to send the raw material into the crusher, and the airflow impacts the inner wall of the first pipe, preventing the raw material from adhering and fixing to the inner wall of the first pipe, thus cleaning the pipe wall. Attached Figure Description

[0016] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the feeding mechanism of an airflow pulverizer proposed in this invention; Figure 2 This is a side view of a feeding mechanism for an airflow pulverizer proposed in this invention; Figure 3 This is a cross-sectional view of the feeding mechanism of an airflow pulverizer proposed in this invention; Figure 4 Appendix to this invention Figure 1 Enlarged view of point A in the middle; Figure 5 Appendix to this invention Figure 3 Enlarged view of point B in the middle; Figure 6 Appendix to this invention Figure 3 Enlarged view of point C in the middle; Figure 7 Appendix to this invention Figure 3 Enlarged view of point D; Labels in the diagram: 1. Container; 2. Screw conveyor; 3. First pipe; 4. First solenoid valve; 5. Door panel; 6. Movable plate; 7. Fixed plate; 8. Telescopic rod; 9. First spring; 10. Second pipe; 11. Second solenoid valve; 12. Sleeve; 13. Third pipe; 14. First check valve; 15. Hollow cylinder; 16. Guide block; 17. Support plate; 18. Drive unit; 19. Cam; 20. Piston block; 21. Transmission rod; 22. Fixed ring; 23. Second check valve; 24. Second spring; 25. Rubber airbag; 26. Fixing strip. Detailed Implementation

[0017] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0018] According to one embodiment of the present invention, Figures 1-7 As shown.

[0019] A feeding mechanism for an airflow pulverizer includes: a container 1, with both the bottom and top open; raw materials are fed in through the top opening and discharged from the bottom opening. The top opening is flared to increase the material feeding range and prevent spillage outside the container 1. A screw conveyor 2 is installed at the bottom opening of the container 1; the raw materials falling into the screw conveyor 2 are transported at a uniform speed to a side away from the container 1, ensuring continuous and stable material delivery and preventing material accumulation and blockage at the bottom of the container 1. A first pipe 3 is bolted to the bottom of the screw conveyor 2 on the side away from the container 1; the bottom of the first pipe 3 is connected to a pulverizer (not shown in the figure) for feeding raw materials into the pulverizer. A movable plate 6 is slidably mounted on container 1, with both ends extending outside container 1. Rubber pads are adhered and fixed to the contact surface between container 1 and movable plate 6, sealing the contact area and preventing raw material dust from leaking out, maintaining the cleanliness of the surrounding area. A screen is embedded in the center of movable plate 6 to screen raw materials, intercepting large particles and agglomerated materials, ensuring that the particle size of the raw materials entering the crusher meets processing requirements. Fixed plates 7 are welded and fixed to both ends of movable plate 6. A power mechanism for driving the movement of movable plate 6 is installed on container 1. The power mechanism includes a drive unit 18 and a cam 19, with cam 19 pressed against fixed plate 7. The drive unit 18 drives cam 19 to rotate. A reset mechanism for resetting movable plate 6 is installed between fixed plate 7 and container 1. The reset mechanism includes an elastic component, wherein the elastic component is a first spring 9. When cam 19 rotates, when the protruding end of cam 19 presses against the fixed plate 7, the fixed plate 7 drives the movable plate 6 to move, and at the same time presses against the elastic component, causing the elastic component to deform. When the protruding end of cam 19 moves away from the fixed plate 7, the elastic component resets, driving the movable plate 6 to reset. In this way, the movable plate 6 makes a reciprocating linear motion in the horizontal direction, which is used to screen raw materials, prevent large-volume raw materials from entering the crusher, and avoid large-particle raw materials from causing wear on the internal components of the crusher or equipment jamming.

[0020] In this embodiment, a door panel 5 is also included, which is fixedly installed on the container 1 by bolts. A sealing strip is provided between the door panel 5 and the container 1 to improve the sealing performance after the door panel 5 is closed. The top of the movable plate 6 can be cleaned by disassembling the door panel 5, which can quickly clean up the large particles of raw materials accumulated on the screen surface and ensure that the screen can continuously screen smoothly.

[0021] In this embodiment, a guide block 16 is also symmetrically welded and fixed inside the container 1. The guide block 16 has a triangular cross-section and its bottom is in close contact with the top of the movable plate 6. The guide block 16 is used to guide the side material to fall onto the screen of the movable plate 6.

[0022] In this embodiment, the power mechanism also includes a support plate 17 that is fixed to the container 1 by bolts. The drive unit 18 is mounted on the support plate 17. The support plate 17 is used to support the drive unit 18, disperse the vibration generated by the drive unit 18 during operation, reduce the impact of vibration on the structure of the container 1, and ensure the stability of power transmission.

[0023] In this embodiment, the drive unit 18 is a motor. The output end of the motor passes through the support plate 17 and is then fixed to the cam 19 by a coupling. The motor drives the cam 19 to rotate. The coupling can buffer the transmission impact between the motor and the cam 19 to ensure that the cam 19 rotates smoothly.

[0024] In this embodiment, the screw conveyor 2 includes a housing, a motor, and an auger; the motor is fixedly mounted on the housing via a mounting bracket, and the auger is rotatably mounted inside the housing via bearings; the output end of the motor is fixedly connected to the auger via a coupling, and the motor is used to drive the auger to rotate for transporting raw materials. When the auger rotates and pushes the raw materials, it can break up slightly clumped raw materials, further optimizing the material conveying state.

[0025] In this embodiment, the reset mechanism also includes a telescopic rod 8 welded and fixed between the fixed plate 7 and the container 1. The first spring 9 is sleeved on the outside of the telescopic rod 8 to prevent the first spring 9 from bending during compression deformation. The telescopic rod 8 extends and retracts synchronously with the movable plate 6 and can also limit the movement trajectory of the movable plate 6 to avoid the movable plate 6 from deviating and getting stuck.

[0026] In this embodiment, a first solenoid valve 4 is also included, which is fixedly installed on the first pipe 3 via a connecting flange. At least two first solenoid valves 4 are provided. The first solenoid valve 4 divides the first pipe 3 into three parts. The first solenoid valve 4 at the top is open, and the first solenoid valve 4 at the bottom is closed. After the raw material is transported into the first pipe 3 by the screw conveyor 2, the raw material accumulates on the first solenoid valve 4 at the bottom until the raw material reaches the input amount. At this time, the first solenoid valve 4 at the bottom is opened, and the first solenoid valve 4 at the top is closed. The raw material accumulated on the first solenoid valve 4 at the bottom is fed into the crusher through the first pipe 3 to achieve the function of quantitative feeding. This process is repeated. The alternating opening and closing of the two solenoid valves can achieve sealed quantitative feeding, prevent raw material leakage, and accurately control the amount of material fed at one time to match the processing speed of the crusher.

[0027] In this embodiment, a second pipe 10 is installed on the first pipe 3, wherein the second pipe 10 is inclined downward and enters the interior of the first pipe 3; a second solenoid valve 11 is installed on the second pipe 10 via a connecting flange, the second solenoid valve 11 is used to control the opening and closing of the second pipe 10; a gas storage assembly for storing gas is installed on the top of the second pipe 10; a third pipe 13 is installed on the top of the gas storage assembly; a first check valve 14 is fixedly installed on the third pipe 13 via a connecting valve, the first check valve 14 prevents the gas flow inside the third pipe 13 from being discharged upward; and a gas injection assembly for injecting gas into the third pipe 13 is installed on the top of the third pipe 13, the gas injection assembly, together with the gas storage assembly, can introduce high-pressure gas flow into the first pipe 3, the gas flow washes the inner wall of the first pipe 3, preventing raw materials from adhering to the pipe wall and causing blockage.

[0028] Specifically, the gas storage assembly includes a fixing strip 26 welded and fixed between the second pipe 10 and the third pipe 13, wherein several fixing strips 26 are provided in a ring arrangement and there are gaps between the fixing strips 26; it also includes a rubber air bladder 25 bonded and fixed between the second pipe 10 and the third pipe 13, the fixing strip 26 is used to connect the second pipe 10 and the third pipe 13, and the rubber air bladder 25 can store gas.

[0029] Specifically, the air injection assembly includes a hollow cylinder 15 welded and fixed to the third pipe 13; a piston block 20 slidably installed inside the hollow cylinder 15; a sleeve 12 welded and fixed to the outside of the hollow cylinder 15, with the bottom of the sleeve 12 fixed to the top of the screw conveyor 2 by a column and bolts, supporting the hollow cylinder 15, improving the installation stability of the hollow cylinder 15, and preventing the hollow cylinder 15 from shaking when the piston block 20 moves; a second one-way valve 23 is embedded and fixed on the top of the hollow cylinder 15 near the third pipe 13, wherein the second one-way valve 23 is used for external air to enter the hollow cylinder 15; a transmission rod 21 is welded and fixed on the side of the piston block 20 away from the third pipe 13, wherein the transmission rod 21 is tightly attached to the fixed plate 7; a fixing ring 22 is welded and fixed to the outside of the transmission rod 21; and a fixing ring 22 is welded and fixed to the outside of the fixing ring 21; A second spring 24 is welded and fixed between the core cylinders 15, and the second spring 24 is sleeved on the outside of the transmission rod 21. During the repeated movement of the fixed plate 7, when the fixed plate 7 moves towards the transmission rod 21, it squeezes the transmission rod 21, drives the piston block 20 to move inside the hollow cylinder 15, and forces the air inside the hollow cylinder 15 into the rubber air bag 25 through the first one-way valve 14. At the same time, the fixed ring 22 squeezes the second spring 24. When the fixed plate 7 moves away from the transmission rod 21, the second spring 24 resets, drives the fixed ring 22 to reset, and causes the piston block 20 to move and reset. At this time, a negative pressure is formed inside the hollow cylinder 15, and external air is drawn into the hollow cylinder 15 through the second one-way valve 23. This process is repeated, and the reciprocating motion of the movable plate 6 synchronously drives the air injection component to work. No additional power source is required, which simplifies the equipment structure and reduces energy consumption.

[0030] Working principle: When in use, the raw material is put into the container 1 from the top of the container 1. At the same time, the drive unit 18 is started. The drive unit 18 drives the cam 19 to rotate. During the rotation of the cam 19, when the convex end of the cam 19 presses against the fixed plate 7, the fixed plate 7 drives the movable plate 6 to move and presses the elastic component, causing the elastic component to deform. When the convex end of the cam 19 moves away from the fixed plate 7, the elastic component resets and drives the movable plate 6 to reset. In this way, the movable plate 6 moves repeatedly to screen the raw material and prevent large-volume raw materials from entering the crusher. At the same time, the vibration of the raw material can break up some of the agglomerated raw materials. During the movement of the fixed plate 7, when the fixed plate 7 moves toward the transmission rod 21, it squeezes the transmission rod 21, driving the piston block 20 to move inside the hollow cylinder 15. This forces the air inside the hollow cylinder 15 into the rubber airbag 25 through the first one-way valve 14. At the same time, the fixed ring 22 squeezes the second spring 24. When the fixed plate 7 moves away from the transmission rod 21, the second spring 24 resets, driving the fixed ring 22 to reset, causing the piston block 20 to move and reset. At this time, a negative pressure is formed inside the hollow cylinder 15, and external air is drawn into the hollow cylinder 15 through the second one-way valve 23. This process is repeated, causing the rubber airbag 25 to inflate. After being screened, the raw materials enter the screw conveyor 2. At this time, the motor drives the auger to rotate, transporting the raw materials into the first pipe 3. The raw materials accumulate on the first solenoid valve 4 at the bottom until the input amount is reached. At this time, the first solenoid valve 4 at the bottom opens, and the second solenoid valve 11 opens, while the first solenoid valve 4 at the top closes. The raw materials accumulated on the first solenoid valve 4 at the bottom are then fed into the crusher through the first pipe 3, achieving the function of quantitative feeding. During the feeding process, the air inside the rubber airbag 25 rushes into the first pipe 3 when the second solenoid valve 11 opens. The airflow impact helps to send the raw materials into the crusher, and the airflow impacts the inner wall of the first pipe 3 to prevent the raw materials from adhering and fixing to the inner wall of the first pipe 3, thus cleaning the pipe wall. After the feeding is completed, the first solenoid valve 4 at the top opens and the first solenoid valve 4 at the bottom closes, and this process is repeated.

[0031] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A feeding mechanism for an airflow pulverizer, comprising: A container, wherein a spiral conveyor is installed at the bottom of the container and a first pipe is installed at the bottom of the spiral conveyor on the side away from the container, characterized in that it further includes a movable plate, the movable plate being slidably installed on the container, both ends of the movable plate extending movably to the outside of the container, a rubber pad being installed on the contact surface between the container and the movable plate, the rubber pad sealing the contact position between the movable plate and the container, and a screen being installed at the center of the movable plate for screening raw materials; Two fixing plates are provided, which are respectively installed at both ends of the movable plate; A power mechanism is mounted on the container and is used to drive the movable plate to move. The power mechanism includes a drive unit and a cam. The cam is in close contact with the fixed plate, and the drive unit is used to drive the cam to rotate. A reset mechanism is installed between the fixed plate and the container. The reset mechanism is used to reset the movable plate. The reset mechanism includes an elastic component, which is a first spring.

2. The feeding mechanism of the airflow pulverizer according to claim 1, characterized in that, It also includes a door panel installed on the container, which is removable for cleaning the top of the movable panel.

3. The feeding mechanism of the airflow pulverizer according to claim 1, characterized in that, It also includes guide blocks symmetrically installed inside the container. The guide blocks have a triangular cross-section and their bottoms are in close contact with the top of the movable plate. The guide blocks are used to guide the raw materials onto the screen of the movable plate.

4. The feeding mechanism of the airflow pulverizer according to claim 1, characterized in that, The power mechanism also includes a support plate mounted on the container, and the drive unit is mounted on the support plate, which supports the drive unit.

5. The feeding mechanism of the airflow pulverizer according to claim 1, characterized in that, The screw conveyor includes a housing, a motor, and an auger; The motor is mounted on the housing, and the auger is rotatably mounted inside the housing; The motor output is fixedly connected to the auger, and the motor is used to drive the auger to rotate for transporting raw materials.

6. The feeding mechanism of the airflow pulverizer according to claim 1, characterized in that, The reset mechanism also includes a telescopic rod installed between the fixed plate and the container, with a first spring sleeved on the outside of the telescopic rod to prevent the first spring from bending during compression deformation.

7. The feeding mechanism of the airflow pulverizer according to claim 1, characterized in that, It also includes a first solenoid valve installed on the first pipeline, at least two of which are provided, and the first solenoid valve divides the first pipeline into three parts.

8. The feeding mechanism of the airflow pulverizer according to claim 1, characterized in that, It also includes a second pipe installed on the first pipe, the second pipe being inclined downwards and inserted into the interior of the first pipe; It also includes a second solenoid valve installed on the second pipeline, which is used to control the opening and closing of the second pipeline; It also includes a gas storage assembly for storing gas installed at the top of the second pipeline; A third pipe is installed on the top of the gas storage assembly; A first check valve is installed on the third pipe to prevent airflow inside the third pipe from being discharged upwards. It also includes a gas injection assembly installed at the top of the third pipe for injecting gas into the third pipe.

9. The feeding mechanism of the airflow pulverizer according to claim 8, characterized in that, The gas storage assembly includes a fixing strip installed between the second pipe and the third pipe. Several fixing strips are arranged in a ring and there are gaps between the fixing strips. It also includes a rubber airbag installed between the second and third pipes.

10. The feeding mechanism of the airflow pulverizer according to claim 9, characterized in that, The gas injection assembly includes a hollow cylinder mounted on a third pipe; A piston block is slidably installed inside the hollow cylinder; It also includes a sleeve installed outside the hollow cylinder, which is mounted on the top of the screw conveyor via a column at the bottom of the sleeve, and supports the hollow cylinder through the sleeve; A second one-way valve is installed on the top of the hollow cylinder near the third pipe. The second one-way valve is used for external air to enter the hollow cylinder. A transmission rod is installed on the side of the piston block away from the third pipe, and the transmission rod is in close contact with the fixed plate; It also includes a retaining ring installed on the outside of the transmission rod; A second spring is installed between the fixed ring and the hollow cylinder, and the second spring is sleeved on the outside of the transmission rod.

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