Airflow mill pulverizing flow guide device and pulverizer using the same

Abstract

The application relates to the technical field of powder production and processing equipment, in particular to a flow guide device for airflow mill pulverization and a pulverizer adopting the flow guide device, wherein the flow guide device for airflow mill pulverization comprises a device body, a flow guide area, a collection area and a drainage area are formed in the device body, and the collection area and the drainage area are distributed around the flow guide area; when the device body is matched with a pulverization cavity and the pulverization cavity is in a working state, airflow sprayed from a nozzle flows to the lower part of the collision area after collision in the middle of a pulverization area and then flows into the flow guide area and the drainage area in sequence; the collection area collects coarse particles sinking downwards, the collection area is formed with an opening, coarse particles in the collection area can flow out through the opening, the flowed-out coarse particles can flow into the drainage area together with airflow and flow out of the drainage area; the flowing direction of airflow flowing out of the drainage area is towards the top of the pulverization cavity. The flow guide device for airflow mill pulverization can improve powder preparation efficiency and improve the vortex state at the bottom of the pulverization cavity.

Description

A flow guiding device for air jet mill pulverization and a pulverizer using the flow guiding device. Technical Field

[0001] This invention relates to the field of powder production and processing equipment technology, specifically to a flow guiding device for air jet milling and a pulverizer using the flow guiding device. Background Technology

[0002] Currently, using an air jet mill is a common method for producing powder. An air jet mill is typically a device that uses a Laval nozzle to generate a high-speed airflow to accelerate particles, causing them to collide and rub against each other, thus pulverizing them.

[0003] Although current air jet mills have many advantages in powder preparation, such as high powder fineness, the inventors have discovered shortcomings in practical use, specifically:

[0004] When the airflow mill is in operation, the airflow is accelerated by the Laval nozzle and collides in the middle region of the mill, creating a vortex below the collision area. Particles are drawn into the vortex. At the same time, when the vortex is large, the vortex velocity in the nozzle area far from the Laval nozzle is low, which causes some particles to deposit in the lower cavity of the grinding zone. This makes it difficult for the particles to rise with the airflow to the classification zone, and it is difficult for the deposited particles to be accelerated again by the high-speed airflow ejected from the Laval nozzle and collide with it, thus hindering the improvement of powder preparation efficiency.

[0005] Therefore, given the problem that particle deposition occurs during the powder preparation process using air jet mills, which makes it difficult to improve powder preparation efficiency, there is an urgent need to design a flow guiding device for air jet mills and a pulverizer using this flow guiding device. Summary of the Invention

[0006] The purpose of this invention is to address the problem that particle deposition during powder preparation using air jet mills makes it difficult to improve powder preparation efficiency, and to provide an air jet mill guiding device and a pulverizer using the guiding device.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0008] A flow guiding device for air jet mill pulverization includes a device body adapted to a pulverization chamber. The device body has a flow guiding zone, a collection zone, and a flow guiding zone formed within it. The flow guiding zone, collection zone, and flow guiding zone are interconnected. The collection zone and flow guiding zone are distributed around the flow guiding zone, such that the flow guiding zone is located in the central region of the device body.

[0009] When the device body and the crushing chamber are engaged and the crushing chamber is in operation, the airflow ejected from the nozzle collides in the middle of the crushing zone and flows downward to the collision zone, and then flows sequentially to the guide zone and the diversion zone. The collection zone is used to collect the settled coarse particles. The collection zone has an opening, and the coarse particles collected in the collection zone can flow out of the collection zone through the opening. The coarse particles flowing out of the opening can flow with the airflow to the diversion zone and then out of the diversion zone. The airflow direction from the diversion zone is towards the top of the crushing chamber.

[0010] As the preferred technical solution of this application, the device body includes an outer side plate, an inner guide member, and several intermediate guide members. The outer side plate and the inner guide member are connected through the intermediate guide members. The inner guide member has an annular structure and forms the guiding area. The outer side plate is used to cooperate with the inner wall of the crushing chamber. The several intermediate guide members separate the area between the outer side plate and the inner guide member, dividing it into several collection areas and several drainage areas.

[0011] As the preferred technical solution of this application, the guide zone is funnel-shaped, and the cross-sectional size of the guide zone gradually decreases from the air inlet to the air outlet.

[0012] As the preferred technical solution of this application, the two intermediate guide members corresponding to the side of the collection area form an included angle α, and the opening direction of the included angle α is away from the central axis of the inner guide member;

[0013] The two intermediate guide members corresponding to the side of the drainage area form an included angle β, and the opening direction of the included angle β is towards the central axis of the inner guide member.

[0014] As the preferred technical solution of this application, the included angle α is an obtuse angle and the included angle β is an acute angle.

[0015] As a preferred technical solution of this application, the flow guide area is used to correspond to the nozzle in the pulverizing chamber, so that when the flow guide device cooperates with the pulverizing chamber, the particles flowing out from the flow guide area enter the airflow sprayed by the nozzle.

[0016] As a preferred technical solution of this application, the outer side plate includes an inclined plate, which is inclined and is used to guide particles falling into the collection area to converge toward the opening.

[0017] As a preferred technical solution of this application, the device body further includes a shielding component, which includes a base, a rotating bar and a fan. The rotating bar and the fan are connected, and the fan is rotatably connected to the base. The base is disposed on the inner guide member or the intermediate guide member. A first flow channel is formed on the inner guide member. The first flow channel is adapted to the fan, and the rotating bar is adapted to the opening.

[0018] After the airflow flows into the inner guide, part of the airflow flows into the first flow channel and then flows to the fan. Driven by the airflow, the fan rotates relative to the base, and the rotating bar rotates.

[0019] When the rotating bar engages with the opening, it has a first state and a second state. In the first state, the rotating bar blocks the opening. In the second state, the rotating bar releases the blockage of the opening. As the fan rotates relative to the base, causing the rotating bar to rotate, the rotating bar repeatedly changes between the first state and the second state.

[0020] As a preferred technical solution of this application, when the rotating bar rotates at a constant speed, the time the rotating bar is in the first state is longer than the time the rotating bar is in the second state within one rotation cycle;

[0021] A shim is provided between the fan and the base. The shim is elastic and is used to increase the resistance when the fan rotates relative to the base.

[0022] The present invention also provides a pulverizer, including the airflow mill pulverizing device as described above, and a pulverizer body, wherein the airflow mill pulverizing device is installed on the pulverizer body, and the material particles are pulverized by collision within the pulverizer body.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. In the scheme of this application, by setting up a guide zone, a collection zone, and a diversion zone, after the device body and the grinding chamber are engaged, when the grinding chamber is in working condition, the airflow ejected from the nozzle collides in the middle of the grinding zone in the grinding chamber and flows downward to the collision zone, causing the airflow to flow into the guide zone. At the same time, the collection zone can collect the coarse particles that sink in the grinding chamber. The coarse particles collected in the collection zone can flow out of the collection zone through the opening. Under the action of the airflow, the airflow can carry the coarse particles flowing out of the opening along with it as it flows from the guide zone into the diversion zone, thereby enabling the airflow to carry... Coarse particles flow out from the guide zone, and the direction of the outflowing coarse particles and the airflow is towards the top of the grinding chamber. This facilitates the flow of the collected coarse particles towards the grinding zone under the action of the airflow, and promotes the collision of the lower layer of coarse particles again, thereby improving the powder preparation efficiency. At the same time, under the guidance of the airflow direction by the device body, the formation of eddies below the collision area in the grinding chamber can be reduced, the probability of coarse particle deposition can be reduced, the difficulty of the sinking coarse particles rising with the airflow to the grinding zone or classification zone can be reduced, and the eddy state at the bottom of the grinding chamber can be improved, reducing airflow loss and energy consumption.

[0025] 2. Furthermore, the guide zone corresponds to the nozzle in the grinding chamber. When the grinding chamber is in operation, the nozzle ejects a high-speed airflow. The airflow and particles flowing out from the guide zone can enter the airflow ejected by the nozzle. This allows the high-speed airflow ejected by the nozzle to accelerate the particles flowing out from the guide zone and guide the particles back into the grinding zone, which is beneficial for the further grinding of the particles and improves the grinding efficiency. In addition, coarse particles can directly enter the nozzle jet zone from the guide zone, which can reduce the time that particles stay at the bottom of the grinding chamber, further improving the grinding efficiency and thus increasing the output.

[0026] 3. Furthermore, by setting up a shielding component, after the airflow enters the inner guide, most of the airflow flows into the diversion area through the guide zone, and a portion of the airflow flows into the first flow channel. After flowing into the first flow channel, the airflow can flow towards the fan. Driven by the airflow, the airflow drives the fan blades to rotate, causing the fan to rotate relative to the base, which in turn drives the rotating bar to rotate. The rotation axis of the rotating bar is the central axis of the rotating bar. Thus, during the rotation of the rotating bar, the rotating bar repeatedly changes between the first state and the second state, causing the opening to be blocked and opened intermittently. When the rotating bar is in the first state, the opening is blocked, which facilitates the collection of particles that sink to the collection area, preventing the collected particles from flowing into the airflow in the diversion area. When the rotating bar is in the second state, the opening is open, and after the particles are collected by the collection area, the flow rate of particles in the airflow from the opening to the diversion area can be increased.

[0027] Therefore, when the opening is blocked, it is beneficial to collect the sinking coarse particles. At the same time, when the airflow flows from the guide zone into the diversion zone, it can reduce the air volume loss. Furthermore, the airflow flowing out of the diversion zone does not carry coarse particles, which is more conducive to the high-speed airflow ejected from the nozzle to accelerate the particles falling into the crushing chamber from the feed inlet, thereby improving the efficiency of the first collision of particles.

[0028] After the opening is unblocked, the converged particles flow into the airflow of the drainage area from the opening. A large number of the sinking particles concentrate and flow towards the crushing area. Since the airflow from the drainage area flows from bottom to top, it is more conducive for the particles to move towards the middle area of ​​the crushing area in an upward tilting direction. The coarse particles moving upward are more likely to collide with the bottom of other particles, thereby increasing the collision area of ​​the particles and facilitating secondary collisions of the sinking coarse particles, which can improve the efficiency of secondary collisions of the particles.

[0029] 4. Furthermore, when the rotating bar rotates at a constant speed, within one rotation cycle, the time the rotating bar is in the first state is longer than the time it is in the second state, thereby increasing the duration of the rotating bar in the first state so that the opening is blocked for a longer period of time, allowing the collection area to collect particles; at the same time, a gasket is placed between the fan and the base. The gasket is elastic and is used to increase the resistance when the fan rotates relative to the base. The degree to which the fan and the base squeeze the gasket is adjustable, thereby adjusting the resistance when the fan rotates relative to the base, which facilitates the control of the fan's rotation speed when the airflow drives the fan to rotate, so as to control the duration of one rotation of the fan. Attached Figure Description

[0030] Figure 1 is a schematic diagram of the structure of a flow guiding device for airflow mill pulverization in one embodiment of the present application when it is in conjunction with the pulverization chamber;

[0031] Figure 2 is a cross-sectional structural schematic diagram of one embodiment of a flow guiding device for airflow milling according to this application;

[0032] Figure 3 is a schematic diagram of one embodiment of a flow guiding device for airflow mill pulverization according to this application;

[0033] Figure 4 is a cross-sectional view of a flow guiding device for airflow milling according to the present application, when a shielding component is provided.

[0034] Figure 5 is a schematic diagram of the shielding component in one embodiment of the airflow mill pulverizing device of this application;

[0035] Figure 6 is a partial structural schematic diagram of the shielding component in one embodiment of the airflow guiding device for grinding in this application;

[0036] Figure 7 is a schematic diagram of the structure of the first and second regions on the shielding component in one embodiment of the airflow milling guide device of this application.

[0037] Figure 8 is a structural schematic diagram of one embodiment of a pulverizer according to this application;

[0038] The diagram shows: 1-device body, 2-guide zone, 3-collection zone, 4-drainage zone, 5-opening, 6-outer side plate, 7-inner guide component, 8-middle guide component, 9-sloping plate, 10-shielding assembly, 11-base, 12-rotating bar, 121-first area, 122-second area, 13-fan, 14-first flow channel, 15-gasket, 16-connector, 17-mounting hole, 18-crusher body, 19-body part one, 20-body part two. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] Example 1: This example provides a flow guiding device for airflow mill pulverization, as shown in Figures 1-3. It includes a device body 1, which is adapted to the pulverization chamber. The device body 1 has a flow guiding area 2, a collection area 3, and a flow guiding area 4 formed inside it. The flow guiding area 2, the collection area 3, and the flow guiding area 4 are interconnected. The collection area 3 and the flow guiding area 4 are distributed around the flow guiding area 2, so that the flow guiding area 2 is located in the middle region of the device body 1.

[0045] When the device body 1 is engaged with the crushing chamber and the crushing chamber is in operation, the airflow ejected from the nozzle collides in the middle of the crushing zone and flows downward to the collision zone, and then flows sequentially into the guide zone 2 and the diversion zone 4. The collection zone 3 is used to collect the settled coarse particles. The collection zone 3 has an opening 5. The coarse particles collected in the collection zone 3 can flow out of the collection zone 3 through the opening 5. The coarse particles flowing out of the opening 5 can flow with the airflow into the diversion zone 4 and then out of the diversion zone 4. The airflow direction from the diversion zone 4 is towards the top of the crushing chamber.

[0046] In this application, by setting up a guide zone 2, a collection zone 3, and a diversion zone 4, after the device body 1 is engaged with the grinding chamber, when the grinding chamber is in working condition, the airflow ejected from the nozzle collides in the middle of the grinding zone in the grinding chamber and flows downwards towards the collision zone, causing the airflow to flow into the guide zone 2. Simultaneously, the collection zone 3 collects the coarse particles that sink in the grinding chamber. The coarse particles collected in the collection zone 3 can flow out of the collection zone 3 through the opening 5. Under the action of the airflow, the airflow carries the coarse particles flowing out of the opening 5 along with the airflow as it flows from the guide zone 2 into the diversion zone 4, thereby... The airflow carrying coarse particles flows out from the guide zone 4, and the direction of the outflowing coarse particles and the airflow is towards the top of the grinding chamber. This facilitates the flow of the collected coarse particles towards the grinding zone under the action of the airflow, and promotes the collision of the lower layer of coarse particles, thereby improving the powder preparation efficiency. At the same time, under the guidance of the airflow direction by the device body 1, the formation of vortices below the collision area in the grinding chamber can be reduced, the probability of coarse particle deposition can be reduced, the difficulty of the sinking coarse particles rising with the airflow to the grinding zone or classification zone can be reduced, and the vortex state at the bottom of the grinding chamber can be improved, reducing airflow loss and energy consumption.

[0047] In a preferred embodiment, based on the above method, the device body 1 further includes an outer plate 6, an inner guide 7, and a plurality of intermediate guides 8. The outer plate 6 and the inner guide 7 are connected by the intermediate guides 8. The inner guide 7 has an annular structure and forms the guiding area 2. The outer plate 6 is used to cooperate with the inner wall of the crushing chamber. The plurality of intermediate guides 8 separate the area between the outer plate 6 and the inner guide 7, dividing it into a plurality of collection areas 3 and a plurality of drainage areas 4.

[0048] Furthermore, by setting an outer side plate 6, an inner guide 7, and an intermediate guide 8, the outer side plate 6 and the inner guide 7 are connected by the intermediate guide 8, and several intermediate guides 8 divide the area between the outer side plate 6 and the inner guide 7 into several collection areas 3 and several drainage areas 4. In this way, the stability of the shape of the drainage area 2, the collection area 3, and the drainage area 4 can be improved.

[0049] As a preferred embodiment, based on the above method, the guide zone 2 is funnel-shaped, and the cross-sectional size of the guide zone 2 gradually decreases in the direction from the air inlet to the air outlet.

[0050] Furthermore, the guide zone 2 is funnel-shaped, and the cross-sectional size of the guide zone 2 gradually decreases in the direction from the air inlet to the air outlet. After the airflow flows into the guide zone 2, it can accelerate the incoming airflow so that the high-speed airflow carries coarse particles out of the guide zone 4.

[0051] As a preferred embodiment, based on the above method, the two intermediate guide members 8 corresponding to the side of the collection area 3 form an included angle α, and the opening 5 of the included angle α is away from the central axis of the inner guide member 7.

[0052] The two intermediate guide members 8 corresponding to the side of the drainage area 4 form an included angle β, and the opening 5 of the included angle β faces the central axis of the inner guide member 7.

[0053] Furthermore, the direction of the opening 5 at the included angle α is away from the central axis of the inner guide 7, and the direction of the opening 5 at the included angle β is towards the central axis of the inner guide 7. This increases the side wall area of ​​the crushing chamber corresponding to the collection zone 3, making it easier for the coarse particles separated from the grading zone to be collected by the collection zone 3 after descending along the inner wall of the crushing chamber, thus further improving the efficiency of the collection zone 3 in collecting the descending coarse particles.

[0054] In a preferred embodiment, based on the above method, the included angle α is an obtuse angle and the included angle β is an acute angle.

[0055] Furthermore, by making the included angle α an obtuse angle and the included angle β an acute angle, the side wall area of ​​the crushing chamber corresponding to the collection zone 3 can be further increased, which further facilitates the collection of the settled coarse particles in the collection zone 3.

[0056] As a preferred embodiment, based on the above method, the flow guiding area 4 is further configured to correspond to the nozzle in the pulverizing chamber, so that when the flow guiding device cooperates with the pulverizing chamber, the particles flowing out from the flow guiding area 4 enter the airflow sprayed by the nozzle.

[0057] Furthermore, the guide zone 4 corresponds to the nozzle in the grinding chamber. When the grinding chamber is in operation, the nozzle ejects a high-speed airflow. The airflow and particles flowing out of the guide zone 4 can enter the airflow ejected by the nozzle, thereby accelerating the particles flowing out of the guide zone 4 and guiding the particles back into the grinding zone, which is beneficial for the further grinding of the particles and improves the grinding efficiency. In addition, coarse particles can directly enter the nozzle jet zone from the guide zone 4, which can reduce the time that the particles stay at the bottom of the grinding chamber, further improve the grinding efficiency, and thus increase the output.

[0058] As a preferred embodiment, based on the above method, the outer side plate 6 further includes an inclined plate 9, which is inclined and is used to guide the particles falling into the collection area 3 to converge toward the opening 5.

[0059] Furthermore, by setting an inclined plate 9, the inclined plate 9 can guide the particles falling into the collection area 3 to converge towards the opening 5, which is conducive to the collection of sinking particles and to guiding the collected sinking particles to flow out from the opening 5.

[0060] Example 2: Based on the technical solution of Example 1, further as shown in Figures 1-7, the device body 1 also includes a shielding component 10. The shielding component 10 includes a base 11, a rotating bar 12, and a fan 13. The rotating bar 12 and the fan 13 are connected. The fan 13 is rotatably connected to the base 11. The base 11 is disposed on the inner guide member 7 or the intermediate guide member 8. A first flow channel 14 is formed on the inner guide member 7. The first flow channel 14 is adapted to the fan 13. The rotating bar 12 is adapted to the opening 5.

[0061] After the airflow flows into the inner guide 7, part of the airflow flows into the first flow channel 14 and then flows to the fan 13. Driven by the airflow, the fan 13 rotates relative to the base 11 and the rotating bar 12 rotates.

[0062] When the rotating bar 12 engages with the opening 5, it has a first state and a second state. In the first state, the rotating bar 12 blocks the opening 5. In the second state, the rotating bar 12 releases the blockage of the opening 5. During the process of the fan 13 rotating relative to the base 11 to make the rotating bar 12 rotate, the rotating bar 12 repeatedly changes between the first state and the second state.

[0063] Furthermore, by setting the shielding component 10, after the airflow flows into the inner guide component 7, most of the airflow flows into the diversion area 4 through the guide area 2, and a portion of the airflow flows into the first flow channel 14. After flowing into the first flow channel 14, the airflow can flow to the fan 13. Driven by the airflow, the airflow drives the blades of the fan 13 to rotate, causing the fan 13 to rotate relative to the base 11, which in turn drives the rotating bar 12 to rotate. The rotation axis of the rotating bar 12 is the central axis of the rotating bar 12. Thus, during the rotation of the rotating bar 12, the rotating bar 12 changes repeatedly between the first state and the second state, causing the opening 5 to be blocked and opened intermittently. When the rotating bar 12 is in the first state, the opening 5 is blocked, which facilitates the collection of particles that sink to the collection area 3, so that the collected particles do not flow into the airflow in the diversion area 4. When the rotating bar 12 is in the second state, the opening 5 is open. After the particles are collected by the collection area 3, the flow rate of particles in the airflow from the opening 5 to the diversion area 4 can be increased.

[0064] Therefore, when the opening 5 is blocked, it is beneficial to collect the sinking coarse particles. At the same time, when the airflow flows from the guide zone 2 into the diversion zone 4, it can reduce the air volume loss. Furthermore, the airflow flowing out of the diversion zone 4 does not carry coarse particles, which is more conducive to the high-speed airflow ejected from the nozzle to accelerate the particles falling into the crushing chamber from the feed inlet, thereby improving the first collision efficiency of the particles.

[0065] After the opening 5 is unblocked, the converged particles flow into the airflow of the diversion zone 4 from the opening 5. A large number of the sinking particles concentrate and flow towards the crushing zone. Since the airflow from the diversion zone 4 flows from bottom to top, it is more conducive for the particles to move towards the middle area of ​​the crushing zone in an upward tilting direction. The coarse particles moving upward are more likely to collide with the bottom of other particles, thereby increasing the collision area of ​​the particles and facilitating secondary collisions of the sinking coarse particles, which can improve the efficiency of secondary collisions of the particles.

[0066] In a preferred embodiment, based on the above method, the rotating bar 12 further includes a first region 121 and a second region 122. When the rotating bar 12 rotates around the central axis of the fan 13, the first region 121 and the second region 122 correspond to the opening 5 in sequence. When the first region 121 corresponds to the opening 5, the opening 5 is blocked. When the second region 122 corresponds to the opening 5, the opening 5 is unblocked.

[0067] As a preferred embodiment, based on the above method, further, when the rotating bar 12 rotates at a constant speed, within one rotation cycle, the time when the rotating bar 12 is in the first state is longer than the time when the rotating bar 12 is in the second state;

[0068] A gasket 15 is provided between the fan 13 and the base 11. The gasket 15 is elastic and is used to increase the resistance when the fan 13 rotates relative to the base 11.

[0069] Furthermore, when the rotating bar 12 rotates at a constant speed, within one rotation cycle, the time that the rotating bar 12 is in the first state is longer than the time that the rotating bar 12 is in the second state, so as to increase the duration of the rotating bar 12 in the first state, so that the opening 5 is in a blocked state for a longer period of time, so that the collection area 3 can collect the particles; at the same time, a gasket 15 is provided between the fan 13 and the base 11. The gasket 15 is elastic and is used to increase the resistance when the fan 13 rotates relative to the base 11. The degree to which the fan 13 and the base 11 squeeze the gasket 15 is adjustable, so as to adjust the magnitude of the resistance when the fan 13 rotates relative to the base 11, thereby facilitating the control of the rotation speed of the fan 13 when the airflow drives the fan 13 to rotate, so as to control the duration of one rotation of the fan 13;

[0070] Specifically, the fan 13 and the base 11 are rotatably connected by a connector 16. The base 11 is provided with a mounting hole 17 that matches the connector 16. The connector 16 passes through the mounting hole 17 and is threadedly connected to the fan 13. The part of the fan 13 that connects to the mounting hole 17 is located on the central axis of the fan 13, and the gasket 15 is located in the area between the fan 13 and the base 11. By rotating the connector 16 relative to the fan 13 along its central axis, the distance between the fan 13 and the base 11 can be changed, thereby changing the degree of compression of the gasket 15, so as to adjust the resistance when the fan 13 rotates relative to the base 11. This makes it easier to control the time required for the fan 13 to rotate one revolution when the airflow in the first flow channel 14 acts on the fan 13, and makes it easier to control the opening and closing time of the opening 5.

[0071] Example 3: This example also provides a pulverizer, as shown in Figure 8, which includes the airflow mill pulverizing guide device as described above, and also includes a pulverizer body 18. The guide device is installed on the pulverizer body 18, and the material particles are pulverized by collision within the pulverizer body 18.

[0072] In this application, the pulverizer includes an airflow mill pulverizing guide device and a pulverizer body 18. The airflow mill pulverizing guide device is installed on the pulverizer body 18. Specifically, the pulverizer body 18 includes a main body part 19 and a main body part 20, which are detachably connected. When installing the airflow mill pulverizing guide device, the main body part 19 and the main body part 20 are separated, and then the airflow mill pulverizing guide device is installed in the main body part 19. After installation, the main body part 19 and the main body part 20 are connected. When the pulverizer body 18 pulverizes particles, under the action of the airflow mill pulverizing guide device, it can improve the vortex state at the bottom of the pulverizing chamber, reduce airflow loss, reduce energy consumption, and improve particle collision efficiency, thereby improving powder preparation efficiency.

[0073] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A flow guiding device for air jet mill pulverization, characterized in that: The device includes a main body adapted to a grinding chamber. Within the main body are a guiding zone, a collecting zone, and a guiding zone, which are interconnected. The collecting and guiding zones are distributed around the guiding zone, with the guiding zone located in the central region of the main body. When the main body is engaged with the grinding chamber and the grinding chamber is in operation, the airflow ejected from the nozzle collides in the center of the grinding zone and flows downwards towards the collision zone, subsequently flowing into the guiding and guiding zones. The collecting zone is used to collect settling coarse particles and has an opening for collecting them. Coarse particles can flow out of the collection area through the opening, and the coarse particles flowing out of the opening can flow together with the airflow into the diversion area and then out of the diversion area; the airflow direction from the diversion area is towards the top of the grinding chamber; the device body includes an outer plate, an inner guide member and several intermediate guide members, the outer plate and the inner guide member are connected by the intermediate guide members, the inner guide member has a ring structure, the inner guide member forms the diversion area, the outer plate is used to cooperate with the inner wall of the grinding chamber, and the several intermediate guide members separate the area between the outer plate and the inner guide member, dividing it into several collection areas and several diversion areas.

2. The flow guiding device for airflow mill pulverization as described in claim 1, characterized in that: The guide zone is funnel-shaped, and the cross-sectional size of the guide zone gradually decreases from the air inlet to the air outlet.

3. The flow guiding device for airflow mill pulverization as described in claim 2, characterized in that: The two intermediate guide members corresponding to the side of the collection area form an angle α, and the opening direction of the angle α is away from the central axis of the inner guide member; the two intermediate guide members corresponding to the side of the drainage area form an angle β, and the opening direction of the angle β is towards the central axis of the inner guide member.

4. The flow guiding device for airflow mill pulverization as described in claim 3, characterized in that: The included angle α is an obtuse angle, and the included angle β is an acute angle.

5. The flow guiding device for air jet milling as described in claim 4, characterized in that: The flow guide area is used to correspond to the nozzle in the pulverizing chamber, so that when the flow guide device is in conjunction with the pulverizing chamber, the particles flowing out from the flow guide area enter the airflow sprayed by the nozzle.

6. The flow guiding device for airflow mill pulverization as described in claim 5, characterized in that: The outer side plate includes an inclined plate, which is inclined to guide particles falling into the collection area toward the opening.

7. The flow guiding device for airflow mill pulverization as described in claim 6, characterized in that: The device body also includes a shielding assembly, which includes a base, a rotating bar, and a fan. The rotating bar and the fan are connected, and the fan is rotatably connected to the base. The base is disposed on the inner guide or intermediate guide, and a first flow channel is formed on the inner guide. The first flow channel is adapted to the fan, and the rotating bar is adapted to the opening. After the airflow flows into the inner guide, part of the airflow flows into the first flow channel and then flows to the fan. Driven by the airflow, the fan rotates relative to the base, and the rotating bar rotates. When the rotating bar is engaged with the opening, it has a first state and a second state. In the first state, the rotating bar blocks the opening. In the second state, the rotating bar releases the blockage of the opening. During the process of the fan rotating relative to the base and causing the rotating bar to rotate, the rotating bar repeatedly changes between the first state and the second state.

8. The flow guiding device for air jet milling as described in claim 7, characterized in that: When the rotating bar rotates at a constant speed, within one rotation cycle, the time the rotating bar is in the first state is longer than the time the rotating bar is in the second state; a shim is provided between the fan and the base, the shim is elastic, and the shim is used to increase the resistance when the fan rotates relative to the base.

9. A pulverizer, characterized in that: The device includes the flow guiding device for air jet milling as described in any one of claims 1-8, and further includes a pulverizer body, wherein the flow guiding device is installed on the pulverizer body, and the material particles are pulverized by collision within the pulverizer body.

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