Anti-sinking jet mill equipment

Abstract

The utility model relates to anti-sinking jet mill equipment which comprises a jet mill body, the spraying mechanism comprises a plurality of crushing nozzles which are uniformly distributed; electronic weighing devices are arranged on the brackets and are connected with and provided with the jet mill bodies; the adjustable connecting mechanism comprises a fixing part mounted on the outer side wall of the jet mill body and a mounting plate vertically and fixedly connected to the end part of the lug plate, and the mounting plate is adjusted up and down to adjust the balance of the jet mill body; a group of adjusting pieces are mounted on the fixing piece in a relatively movable manner and are used for connecting and driving the mounting plate to move up and down; the two adjusting pieces drive the mounting plate to move upwards when moving oppositely, and the two adjusting pieces drive the mounting plate to move downwards when moving oppositely. The lifting mechanism comprises pulse nozzles staggered with the crushing nozzles, and the pulse nozzles are electrically connected through an electronic weighing device so as to be opened and closed in an intermittent operation mode. According to the utility model, the adjustment efficiency and precision of the installation flatness are effectively improved, the weighing precision is further ensured, and the problem of bottom sinking is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of air jet mill technology, specifically to an anti-sinking air jet mill device, particularly an anti-sinking fluidized bed type air jet mill. Background Technology

[0002] An air jet mill is a processing method that uses high-speed airflow to grind the surface of materials. It utilizes the high-speed rotating flow field generated by the airflow to cause the material to continuously rotate, collide, and rub against the airflow, thereby achieving the grinding purpose. Because the material density within the air jet mill affects the crushing effect—too low a density results in low grinding efficiency, while too high a density causes the material to settle at the bottom, affecting the crushing quality—more and more air jet mills are now equipped with corresponding electronic weighing devices. By weighing the material during the grinding process, the density within the air jet mill can be controlled within a set range in conjunction with the feeding.

[0003] However, the addition of an electronic weighing device necessitates a very high degree of flatness in the installation of the air jet mill. Otherwise, it will affect the effectiveness of the electronic weighing device. Poor flatness leads to poor weighing accuracy, which in turn causes the aforementioned problems such as settling at the bottom, affecting the crushing effect of the material inside the air jet mill. Therefore, a corresponding device is needed to adjust the flatness of the air jet mill. Generally, multiple adjustable lugs are installed on the upper and lower sides of the outer wall of the air jet mill. The flatness of the air jet mill is adjusted by adjusting the installation position of the lugs. During installation, the lugs need to be connected to the electronic weighing device first. The air jet mill is then supported by equipment or manpower. The lugs are then connected to the air jet mill, and the lugs are adjusted up and down according to the feedback from the electronic weighing device. However, because the air jet mill itself has a certain weight, the adjustment process is quite cumbersome.

[0004] Therefore, the research objective of this utility model is to design an airflow mill that can effectively improve the adjustment efficiency and accuracy of installation flatness, thereby ensuring the accuracy of weighing and effectively preventing sinking. Utility Model Content

[0005] In view of the technical problems existing in the prior art, the present invention provides an anti-sinking airflow mill device, which can effectively solve the technical problems existing in the prior art.

[0006] The technical solution of this utility model is:

[0007] A jet mill device for preventing settling, comprising:

[0008] An air jet mill includes a sorting chamber and a crushing chamber that are connected vertically. The sorting chamber is provided with a discharge port connected to a corresponding classifying wheel. The crushing chamber is provided with a corresponding feed port on the top side wall and a corresponding discharge port at its bottom through a discharge hopper that is connected to it.

[0009] The material spraying mechanism includes multiple pulverizing nozzles evenly distributed on the lower side of the pulverizing chamber. The pulverizing nozzles are installed below the feed inlet. Compressed air is transmitted through the pulverizing nozzles to form a supersonic airflow that causes the material to collide and break.

[0010] The support includes several evenly distributed annular support columns surrounding the air mill body;

[0011] An electronic weighing device is provided on each of the support columns. The periphery of the airflow mill body is connected to the support column with a corresponding ear plate. The other end of the ear plate is installed on the electronic weighing device, and the airflow mill body is mounted on the bracket for weighing.

[0012] An adjustable connecting mechanism includes a fixing member fixedly installed on the outer side wall of the airflow mill body corresponding to the ear plate, and a mounting plate vertically fixed to the end of the ear plate. The mounting plate is adjusted up and down to adjust the balance of the airflow mill body. A set of adjusting members is movably mounted on the fixing member below the mounting plate. The adjusting members are used to connect and drive the mounting plate to move up and down. When the two adjusting members move towards each other, the mounting plate is driven to move down. When the two adjusting members move away from each other, the mounting plate is driven to move up.

[0013] The material lifting mechanism includes pulse nozzles installed on the side wall of the discharge hopper and arranged alternately with the crushing nozzles. The pulse nozzles are intermittently opened and closed via an electronic weighing device. The crushing nozzles are located above the pulse nozzles.

[0014] The fastener includes a base plate that is fitted and fixedly connected to the airflow mill body, and a set of side plates and bottom plates that are vertically fixed to its periphery. The mounting plate has corresponding mounting holes on both sides of the ear plate. The base plate of the fastener has corresponding elongated holes recessed inward. By interlocking bolts and washers through the mounting holes and elongated holes in sequence, the ear plate is adjustablely locked and fixedly installed on the fastener.

[0015] A double-ended lead screw for driving a set of adjusting components is rotatably mounted between the two side plates of the fixing member and below the mounting plate. The two sides of the double-ended lead screw are respectively provided with driving threads with opposite directions of rotation. The top of the adjusting component is slidably connected to the mounting plate. When the double-ended lead screw rotates in the forward direction, it drives the two adjusting components to move relative to each other. When the double-ended lead screw rotates in the reverse direction, it drives the two adjusting components to move in opposite directions.

[0016] A corresponding bearing seat is fixedly installed on the bottom edge plate of the fixing member between the two adjusting members. The top of the bearing seat is spaced apart from the bottom of the mounting plate. The double-ended lead screw is installed horizontally on the bearing seat and its two ends extend outward and penetrate the side plate.

[0017] The bottom of the mounting plate is symmetrically located on both sides of the bearing seat and is inclined upwards with corresponding chamfered slopes. The mounting plate is recessed inwards from the chamfered slopes and has a T-shaped groove in the longitudinal section. The top of the adjusting member is adapted to the chamfered slopes, and its bottom is spaced apart from the bottom edge plate.

[0018] The feed inlet is connected to a corresponding Y-shaped pipe. One end of the Y-shaped pipe opposite to the feed inlet is connected to the outside through a corresponding adjustable electric air valve, and the other end is connected to an external material source through a corresponding discharge valve.

[0019] The grading wheel is horizontally arranged and driven by a motor fixed to the outside of the sorting chamber. The discharge port is located on the side wall of the sorting chamber and is coaxially arranged with the grading wheel.

[0020] The top of the sorting chamber is provided with a corresponding arc-shaped top cover, which is configured as an arc structure with the center of the discharge port as the center.

[0021] The spraying mechanism also includes an annular air bag coaxially sleeved and fixed on the outside of the air jet mill. The annular air bag is connected to the pulverizing nozzle through a corresponding first guide pipe. The pulse nozzle is connected to the annular air bag through a corresponding pulse valve and a second guide pipe. When the total weight value obtained by the electronic weighing device reaches the set value G1, the pulse valve opens until it closes when the total weight value obtained by the electronic weighing device is lower than the set value G2.

[0022] Advantages of this utility model:

[0023] 1) By evenly distributing corresponding support columns around the perimeter of the air jet mill, and connecting corresponding ear plates to the support columns via corresponding electronic weighing devices, the ear plates are then adjustable and fixedly installed on the outer wall of the air jet mill. The mass of the air jet mill is then weighed using electronic weighing devices to prevent sinking. Based on this, the present invention provides corresponding adjustable connecting mechanisms between the ear plates and the air jet mill. A fixing component is fixedly installed on the outer wall of the air jet mill, and a mounting plate is vertically installed at the end of the ear plate. A set of adjusting components is movably installed on the fixing component below the mounting plate. The adjusting components and the mounting plate are slidably connected via corresponding T-shaped grooves. The opposing sides of the adjusting components and the mounting plate are designed as upwardly inclined slopes. The adjusting components and the fixing component are connected via a double-ended screw. When the double-ended screw rotates forward, it drives the two adjusting components to move relative to each other, thereby driving the mounting plate to move downwards. When the double-ended screw rotates in the reverse direction, it drives the two adjusting components to move relative to each other. The mounting plate is moved upwards and positioned with the components moving in opposite directions. The ear plate and the airflow mill body are initially connected and supported by an adjustable connecting mechanism. Then, the double-ended screw is rotated in the forward direction to drive the ear plate to the upper and lower connection positions of the ear plate and the airflow mill body and fix them. Finally, the connecting fasteners and mounting plate are locked with bolts and washers to fix and flatten the airflow mill body. The adjustment process is carried out by connecting the airflow mill body and the ear plate through the adjustable connecting mechanism. No additional manpower or external force is required to support the airflow mill body. The adjustment method is more convenient and accurate, effectively improving the adjustment efficiency and accuracy of the flatness of the airflow mill body installation, thereby ensuring the accuracy of weighing and achieving the effect of preventing sinking.

[0024] 2) The two ends of the double-ended lead screw used to drive the relative movement of the two adjusting parts are rotatably mounted on the fixed part. On this basis, bearing seats are also fixedly installed on the fixed part for the horizontal installation of the double-ended lead screw. The stability and strength of the double-ended lead screw are ensured by the three-point support and fixation method, thereby ensuring that it has sufficient strength to initially support the airflow mill body. The intervention of the bearing seats ensures the support of the double-ended lead screw, thereby preventing excessive deformation of the double-ended lead screw and ensuring the practical effect of this utility model.

[0025] 3) Based on improving the accuracy of installation flatness adjustment, this utility model adds a material lifting mechanism electrically connected to an electronic weighing device. The electronic weighing device accurately weighs the weight of the airflow mill during the grinding process, and then intermittently operates the pulse nozzles set below the crushing nozzles. This not only lifts the settled material upwards during the crushing process to promote the tumbling and crushing of the settled material, but also disperses and surges the settled material until the value of the electronic weighing device is lower than the set value G2 and then shuts off, improving the crushing efficiency and effect of the crushing zone; it can also effectively optimize the fluidization effect of the material in the airflow mill. The airflow at different heights and directions creates irregular fluidization trajectories in the crushing zone, thereby increasing turbulence and increasing friction and collision between materials, further improving the grinding efficiency.

[0026] 4) This utility model features a Y-shaped pipe at the feed inlet, with a discharge valve and an adjustable electric air valve connected in parallel on the Y-shaped pipe. The adjustable electric air valve is positioned opposite the feed inlet at both ends of the straight pipe. The feed rate can be adjusted by feeding the raw material through the discharge valve, making the feeding more stable and ensuring a stable dust concentration in the chamber. Furthermore, the make-up air volume can be adjusted by the adjustable electric air valve to match the material flow rate in the crushing chamber, thereby enhancing the stability of the crushing chamber.

[0027] 5) The top of the sorting chamber of this utility model is provided with a corresponding arc-shaped top cover, and the arc-shaped top cover is designed with the center of the discharge port as an arc structure, which conforms to fluid mechanics and increases the material screening throughput. The motor connected to the classifying wheel has a direct drive structure, which ensures high transmission efficiency, no slippage and high stability, thereby improving the crushing effect of the air jet mill. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 for Figure 1 A top-down view.

[0030] Figure 3 for Figure 1 A side view diagram.

[0031] Figure 4 for Figure 3 A schematic diagram of the AA section (grading rings omitted).

[0032] Figure 5 This is a schematic diagram of the installation of the adjustable connection mechanism of this utility model.

[0033] Figure 6 This is a schematic diagram of the adjustable connection mechanism of this utility model.

[0034] In the attached diagram: airflow mill body 1, sorting chamber 101, crushing chamber 102, discharge port 103, feed port 104, unloading hopper 105, unloading port 106, spraying mechanism 2, crushing nozzle 201, annular air bag 202, support column 3, electronic weighing device 4, adjustable connection mechanism 5, fixing part 501, base plate 5011, side plate 5012, bottom edge plate 5013, elongated hole 5014, mounting plate 502, slide groove 5021, double-ended lead screw 503, adjusting part 504, bearing seat 505, lifting mechanism 6, pulse nozzle 601, pulse valve 602, ear plate 7, Y-shaped tube 8, adjustable electric air valve 9, arc-shaped top cover 10, motor 11, unloading valve 12. Detailed Implementation

[0035] To facilitate understanding by those skilled in the art, the structure of this utility model will now be described in further detail with reference to the accompanying drawings:

[0036] refer to Figure 1-6 A jet mill device for preventing settling, comprising:

[0037] The air classifier 1 includes a sorting chamber 101 and a pulverizing chamber 102 that are connected vertically. The sorting chamber 101 is provided with a discharge port 103 connected to a corresponding classifying wheel. The top side wall of the pulverizing chamber 102 is provided with a corresponding feed port 104, and the bottom of the pulverizing chamber is provided with a corresponding discharge port 106 connected to a discharge hopper 105. The structure and installation method of the classifying wheel are the same as those of the existing air classifier.

[0038] The spraying mechanism 2 includes a plurality of pulverizing nozzles 201 evenly distributed on the lower side of the pulverizing chamber 102. The pulverizing nozzles 201 are installed below the feed inlet 104. The pulverizing nozzles 201 can be arranged coaxially at the same height and opposite each other. Compressed air is transmitted through the pulverizing nozzles 201 to form a supersonic airflow that causes the material to collide and break.

[0039] The support includes several evenly distributed ring-shaped support columns 3 surrounding the airflow mill 1;

[0040] Electronic weighing device 4, each of the support columns 3 is provided with a corresponding electronic weighing device 4, the periphery of the airflow mill 1 is connected to the support column 3 with a corresponding ear plate 7, and the other end of the ear plate 7 is installed on the electronic weighing device 4, so that the airflow mill 1 can be weighed and installed on the bracket.

[0041] The adjustable connecting mechanism 5 includes a fixing member 501 fixedly installed on the outer side wall of the airflow mill 1 corresponding to the ear plate 7, and a mounting plate 502 vertically fixed to the end of the ear plate 7. The mounting plate 502 is adjusted up and down to adjust the balance of the airflow mill 1. A set of adjusting members 504 are movably installed on the fixing member 501 below the mounting plate 502. The adjusting members 504 are used to connect and drive the mounting plate 502 to move up and down. When the two adjusting members 504 move towards each other, the mounting plate 502 is driven to move down. When the two adjusting members 504 move away from each other, the mounting plate 502 is driven to move up.

[0042] The material lifting mechanism 6 includes a pulse nozzle 601 installed on the side wall of the discharge hopper 105 and arranged alternately with the crushing nozzle 201. The pulse nozzle 601 is intermittently opened and closed via an electronic weighing device 4. The crushing nozzle 201 is located above the pulse nozzle 601.

[0043] The fixing member 501 includes a base plate 5011 that is fitted and fixedly connected to the airflow mill 1, and a set of side plates 5012 and bottom plates 5013 that are vertically fixed to its periphery. The mounting plate 502 is provided with corresponding mounting holes on both sides of the ear plate 7. The base plate 5011 of the fixing member 501 is provided with corresponding elongated holes 5014. By sequentially inserting bolts and washers through the mounting holes and elongated holes 5014, the ear plate 7 is adjustablely locked and fixedly installed on the fixing member 501.

[0044] A double-ended lead screw 503 for driving a set of adjusting members 504 is rotatably mounted between the two side plates 5012 of the fixing member 501, located below the mounting plate 502. The double-ended lead screw 503 has driving threads with opposite directions on both sides. The top of the adjusting member 504 is slidably connected to the mounting plate 502. When the double-ended lead screw 503 rotates in the forward direction, it drives the two adjusting members 504 to move relative to each other. When the double-ended lead screw 503 rotates in the reverse direction, it drives the two adjusting members 504 to move in opposite directions.

[0045] This invention involves evenly distributing support columns 3 around the perimeter of the air jet mill. Corresponding ear plates 7 are connected to the support columns 3 via electronic weighing devices 4. The ear plates 7 are then vertically adjustable and fixedly installed on the outer wall of the air jet mill. The mass of the air jet mill is then weighed by the electronic weighing devices 4 to prevent the mill from sinking to the bottom. Based on this, the present invention provides an adjustable connecting mechanism 5 between the ear plate 7 and the airflow mill. A fixing member 501 is fixedly installed on the outer wall of the airflow mill. A mounting plate 502 is vertically installed at the end of the ear plate 7. A set of adjusting members 504 are movably installed on the fixing member 501 below the mounting plate 502. The adjusting members 504 and the mounting plate 502 are slidably connected via a corresponding T-shaped groove 5021. The opposing sides of the adjusting members 504 and the mounting plate 502 are set as upwardly inclined slopes. The adjusting members 504 and the fixing member 501 are connected via a double-ended screw 503. When the double-ended screw 503 rotates forward, it drives the two adjusting members 504 to move relative to each other, thereby driving the mounting plate 502 to move downwards. When 503 rotates in the reverse direction, it drives the two adjusting parts 504 to move in opposite directions, driving the mounting plate 502 to move upward. The adjustable connecting mechanism 5 can initially connect the mounting ear plate 7 and the airflow mill 1 and support the airflow mill 1. Then, by rotating the double-headed screw 503 in the forward direction, the ear plate 7 and the airflow mill 1 are driven to their upper and lower connection positions and fixed. Finally, the connecting fastener 501 and the mounting plate 502 are locked with bolts and washers to fix and flatly install the airflow mill 1. The adjustment process is carried out by connecting the airflow mill 1 and the ear plate 7 through the adjustable connecting mechanism 5. No additional manpower or external force is required to support the airflow mill 1. The adjustment method is more convenient and accurate, effectively improving the adjustment efficiency and accuracy of the flatness of the airflow mill 1, thereby ensuring the accuracy of weighing and achieving the effect of preventing sinking.

[0046] Based on improving the accuracy of installation flatness adjustment, this utility model adds a lifting mechanism 6 electrically connected to the electronic weighing device 4. The electronic weighing device 4 accurately weighs the weight of the air jet mill 1 during the grinding process, and then intermittently operates the pulse nozzle 601 located below the crushing nozzle 201. This not only lifts the material at the bottom to promote the tumbling and crushing of the material during the crushing process, but also disperses and surges the material at the bottom until the value of the electronic weighing device 4 is lower than the set value G2 and then shuts off, improving the crushing efficiency and effect of the crushing zone 102; it also effectively optimizes the fluidization effect of the material in the air jet mill 1. The airflow at different heights and directions causes irregular fluidization trajectories to be formed in the crushing zone 102, thereby increasing turbulence and increasing friction and collision between materials, further improving the grinding efficiency.

[0047] A corresponding bearing seat 505 is fixedly installed on the bottom plate 5013 of the fixing member 501 between the two adjusting members 504. The top of the bearing seat 505 is spaced apart from the bottom of the mounting plate 502. The double-ended lead screw 503 is horizontally installed on the bearing seat 505 and its two ends extend outward and penetrate the side plate 5012.

[0048] The two ends of the double-ended lead screw 503, which drives the relative movement of the two adjusting components 504, are rotatably mounted on the fixing component 501. In addition, a bearing seat 505 is fixedly installed on the fixing component 501 for horizontal mounting of the double-ended lead screw 503. The stability and strength of the double-ended lead screw 503 are ensured by the three-point support and fixing method, thereby ensuring that it has sufficient strength to initially support the airflow mill 1. The intervention of the bearing seat 505 ensures the support of the double-ended lead screw 503, thereby preventing excessive deformation of the double-ended lead screw 503 and ensuring the practical effect of this utility model.

[0049] The bottom of the mounting plate 502 is symmetrically located on both sides of the bearing seat 505 and is inclined upwards with corresponding chamfered slopes. The mounting plate 502 has a T-shaped groove 5021 recessed inwards from the chamfered slope. The top of the adjusting member 504 is adapted to the chamfered slope. The top of the adjusting member 504 and the bottom of the mounting plate 502 are set as adapted slopes. The bottom of the adjusting member 504 is spaced apart from the bottom edge plate 5013.

[0050] A corresponding Y-shaped pipe 8 is connected to the feed inlet 104. One end of the Y-shaped pipe 8 opposite to the feed inlet 104 is connected to the outside through a corresponding adjustable electric air valve 9, and the other end is connected to an external material source through a corresponding discharge valve 12.

[0051] This invention features a Y-shaped pipe 8 at the feed inlet 104, with a discharge valve and an adjustable electric air valve 9 connected in parallel on the Y-shaped pipe 8. The adjustable electric air valve 9 is positioned opposite the feed inlet 104 at both ends of the straight pipe. The feed rate can be adjusted by feeding the raw material through the discharge valve, making the feeding more stable and ensuring a stable dust concentration in the chamber. Furthermore, the make-up air volume can be adjusted by the adjustable electric air valve 9 to match the material flow rate in the crushing chamber 102, thereby enhancing the stability within the crushing chamber 102.

[0052] The grading wheel is horizontally arranged and driven by a motor 11 fixed to the outside of the sorting chamber 101. The discharge port 103 is located on the side wall of the sorting chamber 101 and is coaxially arranged with the grading wheel.

[0053] The top of the sorting chamber 101 is provided with a corresponding arc-shaped top cover 10, which is configured as an arc structure with the center of the discharge port 103 as the center.

[0054] The top of the sorting chamber 101 of this invention is provided with a corresponding arc-shaped top cover 10. The arc-shaped top cover 10 is designed with the center of the discharge port 103 as the center of the arc structure, which conforms to fluid mechanics and increases the material screening throughput. The motor 11 connected to the classifying wheel has a direct drive structure, which ensures high transmission efficiency, no slippage and high stability, thereby improving the crushing effect of the air jet mill.

[0055] The spraying mechanism 2 also includes an annular air bag 202 coaxially sleeved and fixed on the outside of the air jet mill 1. The annular air bag 202 is connected to the pulverizing nozzle 201 through a corresponding first guide pipe. The pulse nozzle 601 is connected to the annular air bag 202 through a corresponding pulse valve 602 and a second guide pipe. When the total weight value obtained by the electronic weighing device 4 reaches the set value G1, the pulse valve 602 is opened until it is closed after the total weight value obtained by the electronic weighing device 4 is lower than the set value G2.

[0056] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An anti- bottoming airflow mill apparatus, characterized by, include: The air jet mill (1) includes a sorting chamber (101) and a crushing chamber (102) that are connected vertically. The sorting chamber (101) is provided with a discharge port (103) connected by a corresponding classifying wheel. The crushing chamber (102) is provided with a corresponding feed inlet (104) on the top side wall and a corresponding discharge port (106) is provided at its bottom through a discharge hopper (105) that is connected to it. The spraying mechanism (2) includes a plurality of pulverizing nozzles (201) evenly distributed on the lower side of the pulverizing chamber (102). The pulverizing nozzles (201) are installed below the feed inlet (104). Compressed air is transmitted through the pulverizing nozzles (201) to form a supersonic airflow that causes the material to collide and break. The support includes several evenly distributed ring-shaped support columns (3) surrounding the air mill body (1); Electronic weighing device (4), each of the support columns (3) is equipped with a corresponding electronic weighing device (4), the periphery of the airflow mill (1) is connected to the support column (3) with a corresponding ear plate (7), and the other end of the ear plate (7) is installed on the electronic weighing device (4) so ​​that the airflow mill (1) can be weighed and installed on the bracket. The adjustable connection mechanism (5) includes a fixing member (501) fixedly installed on the outer side wall of the airflow mill (1) corresponding to the ear plate (7), and a mounting plate (502) vertically fixed to the end of the ear plate (7). The mounting plate (502) is adjusted up and down to adjust the balance of the airflow mill (1). A set of adjusting members (504) is movably installed on the fixing member (501) below the mounting plate (502). The adjusting members (504) are used to connect and drive the mounting plate (502) to move up and down. When the two adjusting members (504) move towards each other, the mounting plate (502) is driven to move down. When the two adjusting members (504) move away from each other, the mounting plate (502) is driven to move up. The lifting mechanism (6) includes a pulse nozzle (601) installed on the side wall of the discharge hopper (105) and interleaved with the crushing nozzle (201). The pulse nozzle (601) is electrically connected to an electronic weighing device (4) for intermittent operation. The crushing nozzle (201) is located above the pulse nozzle (601).

2. An anti- bottoming airflow mill apparatus as claimed in claim 1, wherein, The fastener (501) includes a base plate (5011) that is fitted and fixedly connected to the airflow mill (1), and a set of side plates (5012) and bottom plates (5013) that are vertically fixed to its periphery. The mounting plate (502) is provided with corresponding mounting holes on both sides of the ear plate (7). The base plate (5011) of the fastener (501) is provided with corresponding elongated holes (5014). By sequentially inserting bolts and washers through the mounting holes and elongated holes (5014), the ear plate (7) is adjustablely locked and fixedly installed on the fastener (501).

3. An anti- bottoming airflow mill apparatus as claimed in claim 2, wherein, A double-ended lead screw (503) for driving a set of adjusting members (504) is rotatably mounted between the two side plates (5012) of the fixing member (501) and below the mounting plate (502). The double-ended lead screw (503) has driving threads with opposite directions on both sides. The top of the adjusting member (504) is slidably connected to the mounting plate (502). When the double-ended lead screw (503) rotates in the forward direction, it drives the two adjusting members (504) to move relative to each other. When the double-ended lead screw (503) rotates in the reverse direction, it drives the two adjusting members (504) to move in opposite directions.

4. An anti- bottoming airflow mill apparatus as claimed in claim 3, wherein, A corresponding bearing seat (505) is fixedly installed on the bottom edge plate (5013) of the fixing member (501) between the two adjusting members (504). The top of the bearing seat (505) is spaced apart from the bottom of the mounting plate (502). The double-ended lead screw (503) is horizontally installed on the bearing seat (505) and its two ends extend outward and penetrate the side plate (5012).

5. An anti- bottoming airflow mill apparatus as claimed in claim 4, wherein, The bottom of the mounting plate (502) is symmetrically located on both sides of the bearing seat (505) and inclined upwards with corresponding chamfered slopes. The mounting plate (502) has a T-shaped groove (5021) recessed inwards from the chamfered slope. The top of the adjusting member (504) is adapted to the chamfered slope, and its bottom is spaced apart from the bottom edge plate (5013).

6. An anti- bottoming airflow mill apparatus as defined in claim 1, wherein, The feed inlet (104) is connected to a corresponding Y-shaped pipe (8). One end of the Y-shaped pipe (8) opposite to the feed inlet (104) is connected to the outside through a corresponding adjustable electric air valve (9), and the other end is connected to an external material source through a corresponding unloading valve (12).

7. The anti-drag mill apparatus of claim 1, wherein, The grading wheel is horizontally arranged and driven by a motor (11) fixed to the outside of the sorting chamber (101). The discharge port (103) is located on the side wall of the sorting chamber (101) and is coaxially arranged with the grading wheel.

8. The anti-drag mill apparatus of claim 1, wherein, The top of the sorting chamber (101) is provided with a corresponding arc-shaped top cover (10), which is configured as an arc structure with the center of the discharge port (103) as the center.

9. The anti-drag mill apparatus of claim 1, wherein, The spraying mechanism (2) also includes an annular air bag (202) coaxially sleeved and fixed on the outside of the airflow mill (1). The annular air bag (202) is connected to the crushing nozzle (201) through a corresponding first guide pipe. The pulse nozzle (601) is connected to the annular air bag (202) through a corresponding pulse valve (602) and a second guide pipe. When the total weight value obtained by the electronic weighing device (4) reaches the set value G1, the pulse valve (602) is opened until the total weight value obtained by the electronic weighing device (4) is lower than the set value G2 and then it is closed.

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