Air flow regulating device for an ultrafine powder jet mill

Abstract

The utility model discloses a kind of airflow adjusting devices of superfine powder airflow mill, it is related to airflow mill production technical field, to solve the technical problem that current airflow mill jet airflow cannot be effectively adjusted, including airflow regulator, the airflow regulator includes two curved rod body, the rod body of quarter circle bending is position adjusting rod, the one end of position adjusting rod is connected with the middle part position of angle adjusting rod, the bottom of three airflow regulators is connected with telescopic column, the top of angle adjusting pivot is connected with positioning slide plate, the middle part position of telescopic column is equipped with adjusting ball.The utility model has the advantages that by the rotation of position adjusting rod, the angle of angle adjusting rod itself is rotated, the adjusting ball in the middle is lifted while rotating, airflow is blown on adjusting ball to adjust, the purpose of airflow adjustment is realized in the whole cavity, and the purpose of airflow adjustment can be realized by the movement of telescopic column.

Description

Technical Field

[0001] This utility model relates to the field of air jet mill production technology, and more specifically, to an airflow regulating device for an ultrafine powder air jet mill. Background Technology

[0002] The core components of an air jet mill mainly consist of a grinding chamber, nozzles, a classifying wheel, and a cyclone collector. During operation, compressed air passes through the nozzles to form a supersonic airflow. Material enters the grinding chamber through the feeding device, where it is accelerated by the supersonic airflow and impacts the chamber walls or collides with other material particles, thus achieving grinding. The ground material particles then enter the classifying wheel with the airflow. In the classifying wheel, particles of different sizes are separated due to varying centrifugal forces. Fine particles pass through the classifying wheel and are collected by the cyclone collector, while coarse particles return to the grinding chamber for further grinding.

[0003] Currently, the primary method for regulating airflow in air classifiers is adjusting the output pressure. This method only affects grinding efficiency, product particle size distribution, and equipment energy consumption. The degree of material grinding is directly related to the output pressure, making it difficult to achieve high flexibility and effective airflow regulation. While internal airflow distribution regulation methods, such as installing guide plates, alter the airflow direction after high-speed air collisions, their inherent structure increases air pressure consumption, leading to concentrated energy loss and insufficient material collisions, hindering timely grinding and prolonging processing time. Therefore, we propose an airflow regulation device for an ultrafine powder air classifier. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide an airflow regulating device for an ultrafine powder airflow mill to solve the technical problem that the airflow ejected from the current airflow mill is not easy to effectively regulate.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an airflow regulating device for an ultrafine powder airflow mill, comprising three airflow regulators, each airflow regulator including two curved rods, one of which is a semi-circular curved rod for angle adjustment and the other of which is a quarter-circular curved rod for position adjustment. One end of the position adjustment rod is connected to the middle of the angle adjustment rod. The bottom of the three airflow regulators is connected to a telescopic column. A position adjustment shaft is installed between the position adjustment rod and the telescopic column. An angle adjustment shaft is installed between the position adjustment rod and the angle adjustment rod. A positioning slide is connected to the top of the angle adjustment shaft. An adjusting ball is installed in the middle of the telescopic column. The adjusting ball is located at the relative middle position of the three airflow regulators. A guide plate for guiding the material deposited at the bottom is installed on the outside of the adjusting ball.

[0006] Preferably, the bending direction of the position adjustment rod on the airflow regulator is opposite to the installation direction of the adjustment ball, and the bending direction of the angle adjustment rod on the airflow regulator is the same as the installation direction of the adjustment ball.

[0007] Preferably, the end of the position adjusting rod away from the telescopic column has an inclined groove for the rotation of the angle adjusting rod at a position corresponding to the rotation stroke of the angle adjusting rod. The width of the inclined groove is greater than the width of the rod body corresponding to the rotation position of the angle adjusting rod. The inclined groove separates the end near the angle adjusting rod into two brackets connected to the outer wall of the angle adjusting shaft. The angle adjusting rod passes through the inside of the brackets to realize the relative rotational connection between the angle adjusting rod and the position adjusting rod.

[0008] Preferably, the adjusting ball connected to the telescopic column is a hollow steel ball, and a limiting column is installed at the bottom of the adjusting ball. The bottom of the column is fixedly connected to the telescopic column. The guide plate is installed in a curved and reflux shape, including a flow guide located on the inner side of the guide plate, a reflux point at the bottom of the inner side, and an annular flow guide block located above the reflux point. The cross-section of the flow guide is an arc that curves downward and outward along the long axis, the cross-section of the reflux point is an arc that curves upward along the long axis, and the cross-section of the flow guide block is an arc that curves downward from the outside to the inside. The guide plate has a groove for the movement of the airflow regulator, and the position adjusting rod is fitted with an auxiliary wheel for the movement of the adjusting ball in a certain curved state.

[0009] Preferably, the fixed end of the telescopic column is connected to the housing of the airflow mill pulverizing chamber, three nozzles are evenly installed on the housing, an annular front assist plate is installed on the outer wall of the front end of the nozzle, and several diamond-shaped fins are installed at the bottom of the front assist plate.

[0010] Preferably, a direction adjustment shaft is installed at the top of the angle adjustment rod, a positioning slide plate is connected to the inner wall of the direction adjustment shaft, the positioning slide plate is slidably connected to the outer wall of the nozzle, and an off-axis motor is installed at the end of the angle adjustment rod away from the direction adjustment shaft. The output end of the off-axis motor is located on the angle adjustment rod and contacts a polarizing fin that vibrates in conjunction with the diamond-shaped fin.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention designs an airflow regulator structure. By rotating the position adjustment rod, the overall angle adjustment rod rotates. The angle adjustment shaft between the position adjustment rod and the angle adjustment rod rotates, thus adjusting the angle of the angle adjustment rod itself. During rotation, the central adjustment ball is lifted, and the airflow is blown onto the adjustment ball for adjustment. The airflow adjustment is achieved within the entire cavity. The airflow adjustment can be achieved by moving the telescopic column, thereby solving the technical problem of the inconvenience of adjusting the airflow ejected from the nozzle in the existing airflow mill.

[0012] This invention utilizes a guide plate installed on the outside of the regulating ball. When gas flows, it passes through the guide plate and flows towards the bottom guide point. The cross-section of the guide point is an arc shape that curves downwards and outwards along its long axis, allowing air to flow downwards along the arc structure. A return flow point designed at the bottom of the guide plate, based on aerodynamics, creates a return flow position. The cross-section of the return flow point is an arc shape that curves upwards along its long axis, allowing air to enter the arc position and then exit upwards and outwards along the inner wall. Following the airflow from bottom to top, the air carries material towards the ball along an inclined annular guide block. The cross-section of the guide block is an arc shape that curves downwards from the outside inwards, ensuring smooth airflow, reducing flow obstruction, reducing air resistance, and improving flow performance. After passing the output position of the nozzle, the air is blown up again for pulverization, reducing material accumulation at the bottom and achieving the purpose of readjusting the airflow.

[0013] 3. This utility model also designs a polarizing fin. The output end of the off-axis motor installed at one end of the angle adjustment rod rotates, causing the polarizing fin to resonate, so that it resonates with the front-end auxiliary plate, thus cleaning the powder from the nozzle. At the same time, when the positioning slide plate slides, it ensures that the polarizing fin's stroke is always in contact with the front-end auxiliary plate under the action of the angle adjustment rod, preventing inconsistent output pressure caused by nozzle clogging, etc. It also achieves the purpose of cleaning the nozzle and adjusting the airflow when the airflow regulator moves, which is convenient for material crushing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the airflow regulator connection structure of this utility model; Figure 4 This is a schematic diagram of the airflow regulator structure of this utility model; Figure 5 This is a schematic diagram of the adjusting ball connecting guide plate of this utility model; Figure 6 This is a schematic diagram showing the position of the guide plate of this utility model; Figure 7 This is a side sectional view of the guide plate of this utility model.

[0015] The following are the labels in the diagram: 100, housing; 110, telescopic column; 120, adjusting ball; 121, guide plate; 122, return flow point; 123, guide block; 124, guide flow point; 13, airflow regulator; 130, position adjustment shaft; 131, auxiliary wheel; 140, position adjustment rod; 141, inclined trough; 150, angle adjustment rod; 151, angle adjustment shaft; 152, direction adjustment shaft; 160, positioning slide plate; 170, off-axis motor; 171, polarizing fin; 180, nozzle; 181, front-end assist plate. Detailed Implementation

[0016] like Figures 1 to 7 As shown, this utility model relates to an airflow regulating device for an ultrafine powder airflow mill, comprising three airflow regulators 13. Each airflow regulator 13 includes two curved rods: a semi-circular curved rod is an angle adjusting rod 150, and a quarter-circular curved rod is a position adjusting rod 140. One end of the position adjusting rod 140 is connected to the middle of the angle adjusting rod 150. A telescopic column 110 is connected to the bottom of the three airflow regulators 13. A position adjusting shaft 130 is installed between the position adjusting rod 140 and the telescopic column 110. An angle adjusting shaft 151 is installed between the position adjusting rod 140 and the angle adjusting rod 150. A positioning slide plate 160 is connected to the top of the angle adjusting shaft 151. An adjusting ball 120 is installed at the middle of the telescopic column 110, and the adjusting ball 120 is located at the relative middle position of the three airflow regulators 13.

[0017] This invention, through the design of the airflow regulator 13 structure, uses the rotation of the position adjustment rod 140 to drive the rotation of the overall angle adjustment rod 150. The rotation of the angle adjustment shaft 151 between the position adjustment rod 140 and the angle adjustment rod 150 adjusts the angle of the angle adjustment rod 150 itself. Simultaneously, the rotation lifts the central adjustment ball 120, allowing airflow to be directed onto the ball for adjustment. This achieves airflow regulation within the entire cavity. Furthermore, the movement of the telescopic column 110 enables airflow regulation, thus solving the technical problem of unadjustable airflow from the nozzle in existing airflow mills.

[0018] This invention also incorporates a polarizing fin 171. The output of an off-axis motor 170 mounted on one end of the angle adjustment rod 150 rotates, causing the polarizing fin 171 to resonate. This resonates with the front-end assist plate 181, cleaning the powder from the nozzle 180. Simultaneously, the positioning slide plate 160 ensures that the polarizing fin 171, driven by the angle adjustment rod 150, remains in contact with the front-end assist plate 181 throughout its travel. This prevents inconsistent output pressure caused by nozzle 180 blockage and achieves the purpose of cleaning the nozzle 180 and regulating the airflow when the airflow regulator 13 moves, facilitating material pulverization.

[0019] Specifically, the bending direction of the position adjusting rod 140 on the airflow regulator 13 is opposite to the installation direction of the adjusting ball 120, and the bending direction of the angle adjusting rod 150 on the airflow regulator 13 is the same as the installation direction of the adjusting ball 120. The bending direction of the position adjusting rod 140, which is opposite to the installation position of the adjusting ball 120, can drive the angle adjusting rod 150 to move downward, thereby driving the angle adjusting rod 150 to rotate and drive the positioning slide plate 160 to move horizontally. The bending direction of the angle adjusting rod 150 achieves the purpose of relative displacement and rotation at its two ends, thereby realizing the powder treatment of the nozzle 180 and facilitating linkage operation.

[0020] Furthermore, at the end of the position adjusting rod 140 furthest from the telescopic column 110, corresponding to the rotation stroke of the angle adjusting rod 150, there is an inclined groove 141 for the rotation of the angle adjusting rod 150. The width of the inclined groove 141 is greater than the width of the rod body corresponding to the rotation position of the angle adjusting rod 150. The inclined groove 141 separates the end near the angle adjusting rod 150 into two brackets connected to the outer wall of the angle adjusting shaft 151. The inside of the brackets passes through the angle adjusting rod 150, thus enabling the angle adjusting rod 150 to rotate with the position adjusting rod 150. The adjusting rod 140 is rotatably connected; the opening of the inclined groove 141 allows the angle adjusting rod 150 to pass directly through the inclined groove 141 when it rotates to a certain angle, which increases the rotation angle of the angle adjusting rod 150 and thus increases the moving distance of the positioning slider. The inclined groove 141 connects the position adjusting rod 140 and the angle adjusting shaft 151 through a bracket, which improves the stability of the connection, facilitates the rotation of the angle adjusting shaft 151, and realizes the purpose of flexible rotation between the angle adjusting rod 150 and the position adjusting rod 140.

[0021] It should be noted that the adjusting ball 120 connected to the telescopic column 110 is a hollow structural steel ball, a limiting cylinder is mounted at the bottom of the adjusting ball 120, the bottom of the cylinder is fixedly connected to the telescopic column 110, a guide plate 121 for guiding the material deposited at the bottom is mounted on the outer side of the adjusting ball 120, the guide plate 121 is installed in a curved backflow shape as a whole, the cross section of the flow guiding portion 124 is an arc that curves downward and outward along the long axis direction, the cross section of the backflow portion 122 is an arc that curves upward along the long axis direction, the cross section of the flow guiding block 123 is an arc that curves downward extending from the outside to the inside, the guide plate 121 is provided with a groove for the movement of the airflow regulator 13, and the position adjusting rod 140 is fitted with an auxiliary wheel 131 for the movement of the adjusting ball 120 at a position where it fits the adjusting ball 120 in a certain bent state; the hollow structure ensures that the adjusting ball 120 can flexibly move upward when squeezed by the position adjusting rod 140, and the steel structure can effectively improve the collision strength of materials, enhance the crushing performance, and facilitate the adjustment of airflow. When the position adjusting rod 140 moves, the auxiliary wheel 131 mounted on the position adjusting rod 140 will come into contact with the adjusting ball 120 at a certain stage, thereby driving the movement of the adjusting ball 120, so that when the adjusting ball 120 rises to the position opposite to the output position of the nozzle 180, it can affect the airflow output by the nozzle 180. The particles carried by the high-speed airflow rebound after hitting the spherical surface, generating a secondary crushing effect. At the same time, the guide plate 121 at the bottom of the adjusting ball 120 guides the airflow to diffuse toward the bottom. Through the designed backflow structure, the airflow turns over at the bottom and drives the material to move obliquely upward to the middle position, corresponding to the output position of the nozzle 180 for crushing, so as to avoid material accumulation at the bottom.

[0022] It should be introduced that the fixed end of the telescopic column 110 is connected to the housing 100 of the jet mill crushing chamber, three nozzles 180 are evenly mounted on the housing 100, an annular front auxiliary plate 181 is mounted on the outer wall of the front end of the nozzle 180, and a plurality of diamond-shaped fins are mounted at the bottom of the front auxiliary plate 181; the telescopic column 110 is installed at the bottom of the inner cavity of the housing 100 in a state isolated from the outside, so as to ensure the telescopic performance of the telescopic column 110. At the same time, during telescoping, the connected position adjusting rotating shaft 130 can quickly adjust the position of the position adjusting rod 140 when receiving downward pressure, so that it contracts inward, thereby pushing the adjusting ball 120 upward, and simultaneously driving the positioning sliding plate 160 to move toward the output position of the nozzle 180, realizing rapid linkage operation. The three nozzles 180 and the three airflow regulators 13 cooperate and link with each other to improve the airflow regulation performance.

[0023] It is worth noting that a direction adjustment shaft 152 is installed on the top of the angle adjustment rod 150, and a positioning slide plate 160 is connected to the inner wall of the direction adjustment shaft 152. The positioning slide plate 160 is slidably connected to the outer wall of the nozzle 180. An off-axis motor 170 is installed at the end of the angle adjustment rod 150 away from the direction adjustment shaft 152. The output end of the off-axis motor is located on the angle adjustment rod 150 and contacts a polarizing fin 171 that vibrates in conjunction with the diamond-shaped fin. During use, the positioning slide plate 160 is used to relatively restrict the position of the angle adjustment rod 150, so that the polarizing fin 171 on the angle adjustment rod 150 can always vibrate in accordance with the diamond-shaped fin, preventing the nozzle 180 from becoming clogged. In actual use, cleaning equipment can also be installed on both sides of the positioning slide plate 160 to clean the powder from the outer wall of the nozzle 180 when the positioning slide plate moves.

[0024] Working Principle: This embodiment provides an airflow regulating device for an ultrafine powder airflow mill. During use, the material enters the cavity inside the housing 100, and the nozzle 180 sprays high-pressure air, causing the material to fluidize. Material particles collide, rub, and shear at the intersection of the nozzles. During use, the bottom telescopic column 110 extends and retracts. In the extended state: the position adjusting rod 140 rotates downwards, and the positioning slider is located at the rear end of the nozzle 180, receiving pressure from the end of the position adjusting rod 140. One end of the angle adjusting rod 150, in conjunction with the direction adjusting shaft 152, abuts against the slider, while the polarizing fin 171 corresponding to the off-axis motor 170 on the other end contacts the front assist plate 181. The output end of the off-axis motor 170 rotates, causing the polarizing fin 171 and the front assist plate 181 to vibrate against each other, cleaning the powder on the nozzle 180. At this time, the adjusting ball 120 is at the bottom and is not subjected to the pressure of the position adjusting rod 140. In the retracted state: the position adjusting rod 140 extends and retracts... The downward contraction is achieved by adjusting the angle of the position adjustment shaft. Simultaneously, the outer side is compressed, indirectly compressing the inner adjustment ball 120. The adjustment ball 120 moves upward, cooperating with the movement of the auxiliary wheel 131. At the same time, the angle adjustment rod 150 connected to the other end of the position adjustment rod 140 receives a pulling force and moves towards the nozzle 180. The positioning slider moves towards the nozzle 180, and the angle adjustment rod 150 rotates, driving the off-axis motor 170 to rotate downward and move within the inclined trough 141. Ultimately, the adjustment ball 120 moves to the air ejection position of the nozzle 180, affecting the airflow output by the nozzle 180. The particles carried by the high-speed airflow bounce off the ball surface, generating a secondary crushing effect. At the same time, the airflow blows the material at the bottom through the guide plate 121 and gathers towards the center for further crushing. The extension and retraction of the telescopic column 110 forms a complete path, thereby realizing the up and down movement of the adjustment ball 120, the horizontal movement of the positioning slide plate 160, and the timed contact vibration of the polarizing fin 171.

[0025] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. An airflow regulating device for an ultrafine powder airflow mill, characterized in that, The system includes three airflow regulators (13), each comprising two curved rods: a semi-circular curved rod for angle adjustment (150) and a quarter-circular curved rod for position adjustment (140). One end of the position adjustment rod (140) is connected to the middle of the angle adjustment rod (150). A telescopic column (110) is connected to the bottom of each of the three airflow regulators (13). A position adjustment mechanism is installed between the position adjustment rod (140) and the telescopic column (110). An angle adjustment shaft (151) is installed between the shaft (130), the position adjustment rod (140) and the angle adjustment rod (150). The top of the angle adjustment shaft (151) is connected to a positioning slide plate (160). An adjustment ball (120) is installed at the middle position of the telescopic column (110). The adjustment ball (120) is located at the relative middle position of the three airflow regulators (13). A guide plate (121) for guiding the material deposited at the bottom is installed on the outside of the adjustment ball (120).

2. The airflow regulating device for an ultrafine powder airflow mill according to claim 1, characterized in that, The bending direction of the position adjustment rod (140) on the airflow regulator (13) is opposite to the installation position direction of the adjustment ball (120), and the bending direction of the angle adjustment rod (150) on the airflow regulator (13) is the same as the installation position direction of the adjustment ball (120).

3. The airflow regulating device for an ultrafine powder airflow mill according to claim 2, characterized in that, The end of the position adjusting rod (140) away from the telescopic column (110) has an inclined groove (141) for the rotation of the angle adjusting rod (150) at a position corresponding to the rotation stroke of the angle adjusting rod (150). The width of the inclined groove (141) is greater than the width of the rod corresponding to the rotation position of the angle adjusting rod (150). The inclined groove (141) separates the end near the angle adjusting rod (150) into two brackets connected to the outer wall of the angle adjusting shaft (151). The angle adjusting rod (150) passes through the inside of the brackets to realize the relative rotational connection between the angle adjusting rod (150) and the position adjusting rod (140).

4. The airflow regulating device for an ultrafine powder airflow mill according to claim 3, characterized in that, The adjusting ball (120) connected to the telescopic column (110) is a hollow steel ball. A limiting column is installed at the bottom of the adjusting ball (120). The inner side of the guide plate (121) is installed in a curved backflow shape, including a flow guide (124) on the inner side of the guide plate (121), a backflow point (122) at the bottom of the inner side, and an annular flow guide block (123) above the backflow point (122). The cross-section of the flow guide (124) is an arc that curves downward and outward along the long axis. The cross-section of the return point (122) is an arc shape that bends upward along the long axis, the cross-section of the guide block (123) is an arc shape that bends downward from the outside to the inside, the guide plate (121) has a groove for the movement of the airflow regulator (13), the bottom of the column is fixedly connected to the telescopic column (110), and the position adjustment rod (140) is fitted with the position of the adjustment ball (120) in a certain bending state and is equipped with an auxiliary wheel (131) for the movement of the adjustment ball (120).

5. The airflow regulating device for an ultrafine powder airflow mill according to claim 4, characterized in that, The fixed end of the telescopic column (110) is connected to the housing (100) of the airflow mill grinding chamber. Three nozzles (180) are evenly installed on the housing (100). An annular front-end assist plate (181) is installed on the outer wall of the front end of the nozzle (180). Several diamond-shaped fins are installed at the bottom of the front-end assist plate (181).

6. The airflow regulating device for an ultrafine powder airflow mill according to claim 5, characterized in that, The angle adjustment rod (150) is equipped with a direction adjustment shaft (152) at its top. The inner wall of the direction adjustment shaft (152) is connected to a positioning slide plate (160). The positioning slide plate (160) is slidably connected to the outer wall of the nozzle (180). An off-axis motor (170) is installed at the end of the angle adjustment rod (150) away from the direction adjustment shaft (152). The output end of the off-axis motor is located on the angle adjustment rod (150) and contacts a polarizing fin (171) that vibrates in conjunction with the rhomboid fin.

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