A jet mill

Abstract

The present invention discloses an air flow mill, which relates to the field of magnetic powder core processing equipment, and includes: a grinding chamber body, wherein the grinding chamber body is composed of an upper grinding chamber, a middle grinding chamber, and a lower grinding chamber plugged in from top to bottom; a bottom plate for supporting the grinding chamber body; a top plate located above the grinding chamber body, wherein a sorting chamber matching the grinding chamber body is installed through the top plate; and an adjustment mechanism for adjusting the distance between the bottom plate and the top plate. The air flow mill in the present invention is provided with a top plate, a bottom plate, an adjustment mechanism, an upper grinding chamber, a middle grinding chamber, and a lower grinding chamber plugged in with each other. When the adjustment mechanism increases the distance between the bottom plate and the top plate, the distance between the upper grinding chamber, the lower grinding chamber, and the middle grinding chamber will also increase, thereby separating the middle grinding chamber from the upper grinding chamber and the lower grinding chamber, thereby facilitating the replacement of the upper grinding chamber, the lower grinding chamber, or the middle grinding chamber; when part of the grinding chamber is damaged, only the corresponding part needs to be replaced, thereby reducing the cost of replacement.

Description

Technical Field

[0001] The invention relates to the field of magnetic powder core processing equipment, in particular to an air flow mill. Background Art

[0002] Magnetic powder core is a composite soft magnetic material made from soft magnetic powder through powder metallurgy after insulation protection. It is widely used in the production of various electronic components such as communications, energy, automotive industry, home appliances, automatic door control, inductors, filters, mutual inductors, inverters, etc.

[0003] When preparing magnetic powder cores, a jet mill is required to crush the magnetic powder alloy fragments. The jet mill is an ultra-fine grinding device that uses the strong multi-phase turbulent flow field formed when high-speed air is ejected to cause the particles in it to collide and rub with themselves or collide and rub with the inner wall of the equipment, causing particle crushing.

[0004] When using existing air flow mills, the particles in the grinding chamber are constantly impacted and collided with the inner wall of the grinding chamber by the high-speed airflow, causing wear on the inner wall of the grinding chamber and causing the grinding chamber to be worn through. The existing grinding chamber is an integrated structure. If the side wall of the grinding chamber is severely worn, the entire grinding chamber must be replaced, which wastes materials and is costly. Summary of the Invention

[0005] The object of the present invention is to provide a jet mill for solving the technical problem in the prior art that when a grinding chamber is partially damaged, the entire grinding chamber needs to be replaced, resulting in high replacement costs.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A jet mill comprises: a grinding chamber body, which is composed of an upper grinding chamber, a middle grinding chamber and a lower grinding chamber connected in sequence from top to bottom, and two fixed plates are installed on the sides of the upper grinding chamber, the middle grinding chamber and the lower grinding chamber; a bottom plate for supporting the grinding chamber body; a top plate, which is located above the grinding chamber body and is penetrated by a sorting chamber matching the grinding chamber body; an adjusting mechanism for adjusting the distance between the bottom plate and the top plate; wherein, when the adjusting mechanism adjusts the distance between the bottom plate and the top plate, the horizontal heights of the upper grinding chamber, the middle grinding chamber and the lower grinding chamber will change.

[0008] Preferably, the adjustment mechanism includes: two horizontal plates, both located below the bottom plate; two adjustment components, respectively installed on the top surfaces of the two horizontal plates, for adjusting the distance between the horizontal plates and the bottom plate; four sliding rods, respectively installed on the top surfaces of the two horizontal plates, the sliding rods passing through the bottom plate and fixedly connected to the bottom surface of the top plate, the two sliding rods close to the grinding chamber body are each installed with a first I-shaped piece, a second I-shaped piece and a third I-shaped piece, the height of the first I-shaped piece is less than the height of the second I-shaped piece, and the height of the second I-shaped piece is less than the height of the third I-shaped piece; the fixed plates on the upper grinding chamber, the middle grinding chamber and the lower grinding chamber are respectively located in the first I-shaped piece, the second I-shaped piece and the third I-shaped piece.

[0009] Preferably, the adjustment assembly includes: a threaded barrel, rotatably mounted on the top surface of the horizontal plate; a threaded rod, threadedly connected to the threaded barrel, and its upper end fixedly connected to the bottom surface of the base plate; and a turntable, fixedly sleeved on the surface of the threaded barrel.

[0010] Preferably, a cover plate is installed on the top surface of the sorting chamber, a fine material outlet pipe is installed through the side of the sorting chamber, a dual-axis motor is installed on the side of the sorting chamber, a power output shaft of the dual-axis motor extends into the sorting chamber, and a grading impeller is installed on the power output shaft.

[0011] Preferably, the top surfaces of the upper grinding chamber, the middle grinding chamber and the lower grinding chamber are all provided with a first groove, and the bottom surfaces of the upper grinding chamber and the middle grinding chamber are both installed with a first plug plate matching the first groove; a plurality of nozzles are installed through the side of the lower grinding chamber, and a coarse material outlet pipe is installed at the bottom of the lower grinding chamber; a feed pipe is installed through the side of the middle grinding chamber.

[0012] Preferably, a crushing box is installed on the top surface of the top plate, and two shafts are rotatably installed in the crushing box, one end of each of the two shafts extends outside the crushing box, and a driven gear is installed on the end of the shaft outside the crushing box, and the driven gear is meshed with a driving gear installed on the power output shaft of the dual-axis motor; a crushing roller is fixedly sleeved on the part of the shaft located in the crushing box.

[0013] Preferably, a feed hopper is installed through the top surface of the crushing box, and a sealing plug is inserted into the feed hopper; and an air injection pipe is installed through the side surface of the crushing box.

[0014] Preferably, a feeding hopper is installed on the bottom surface of the crushing box, a feeding pipe is installed on the bottom surface of the feeding hopper, a valve is installed on the feeding pipe, and a second plug plate matching the second groove is installed on the bottom surface of the feeding pipe.

[0015] Preferably, a convex strip is installed on the part of any of the shafts located in the crushing box, a filter cartridge is installed on the top surface of the crushing box, and a striking assembly is installed on the bottom surface of the filter cartridge, and the striking assembly includes: a mounting plate; two springs, one end of which is fixedly connected to the mounting plate and the other end of which is fixedly connected to the bottom surface of the filter cartridge; two connecting rods, respectively installed on both sides of the mounting plate, and the other ends of the two connecting rods are each installed with a rubber ball.

[0016] Preferably, an air delivery mechanism is installed on the top surface of the base plate, and the air delivery mechanism includes: an air pump, installed on the top surface of the base plate, an air extraction pipe and an air outlet pipe are installed on the air pump, and the other end of the air extraction pipe is fixedly connected to and connected with the filter cartridge; an annular tube, installed on the top surface of the base plate, and the annular tube is fixedly connected to and connected with the air outlet pipe; a plurality of connecting tubes, one end of which is fixedly connected to and connected with the annular tube, and the other end of which is connected to the nozzle.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] 1. The air flow mill of the present invention is provided with a top plate, a bottom plate, an adjusting mechanism, and an upper grinding chamber, a middle grinding chamber, and a lower grinding chamber that are plugged into each other. When the adjusting mechanism increases the distance between the bottom plate and the top plate, the horizontal heights of the upper grinding chamber, the middle grinding chamber, and the lower grinding chamber will change, and the distances between the upper grinding chamber, the lower grinding chamber, and the middle grinding chamber will also increase, thereby separating the middle grinding chamber from the upper grinding chamber and the lower grinding chamber, thereby facilitating the replacement of the upper grinding chamber, the lower grinding chamber, or the middle grinding chamber. When part of the grinding chamber is damaged, only the corresponding part needs to be replaced, thereby reducing the replacement cost.

[0019] 2. The air flow mill of the present invention is provided with a crushing box, a shaft, a crushing roller and a driven gear. The magnetic powder alloy fragments to be processed are added into the crushing box, so that the magnetic powder alloy fragments fall onto the two crushing rollers. Then, by starting the dual-axis motor, the power output shaft of the dual-axis motor drives the driving gear to rotate, and then engages and drives the two driven gears to rotate, thereby driving the two shafts and the two crushing rollers to rotate, so that the two crushing rollers crush the magnetic powder alloy fragments and crush the magnetic powder alloy fragments into smaller fragments, thereby facilitating subsequent air flow crushing.

[0020] 3. The jet mill of the present invention is provided with a sealing plug and an air injection pipe. When crushing the magnetic powder alloy fragments, nitrogen can be introduced into the crushing box. The nitrogen can reduce the temperature of the magnetic powder alloy fragments and prevent the magnetic powder alloy fragments from being oxidized during crushing.

[0021] 4. The striking assembly of the present invention is provided with a mounting plate, a spring and a rubber ball. When the shaft drives the convex strip to rotate, the rotating convex strip will move the mounting plate, thereby causing the mounting plate to shake, thereby driving the connecting rod and the rubber ball to move, and then the rubber ball strikes the filter cartridge, thereby causing the filter cartridge to vibrate, thereby shaking off the debris attached to the surface of the filter cartridge, thereby preventing the debris from clogging the filter pores of the filter cartridge and affecting the filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The three-dimensional jet mill of the present invention Figure 1 ;

[0023] Figure 2 The three-dimensional jet mill of the present invention Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the assembly structure of the grinding chamber body and the sorting chamber of the present invention;

[0025] Figure 4 This is an exploded view of the grinding chamber body and the sorting chamber of the present invention;

[0026] Figure 5 is a three-dimensional diagram of the adjustment mechanism of the present invention;

[0027] Figure 6 Schematic diagram of the assembly structure of the first I-shaped member, the second I-shaped member, the third I-shaped member and the limiting rod of the present invention;

[0028] Figure 7 It is a left side view of the jet mill of the present invention;

[0029] Figure 8 Schematic diagram of the internal structure of the crushing box and the sorting chamber of the present invention;

[0030] Figure 9 is a three-dimensional diagram of the gas delivery mechanism of the present invention;

[0031] Figure 10 Schematic diagram of the internal structure of the sorting chamber of the present invention;

[0032] Figure 11 For the present invention Figure 10 A magnified schematic diagram of part A;

[0033] 1. Reference numerals: 100, grinding chamber body; 110, upper grinding chamber; 120, middle grinding chamber; 121, feed pipe; 122, second groove; 130, lower grinding chamber; 131, nozzle; 132, coarse material outlet pipe; 140, sealing cover; 150, fixing plate; 151, limiting hole; 152, first groove; 153, first plug plate; 200, sorting chamber; 201, fine material outlet pipe; 210, cover plate; 202, grading impeller; 220, dual-axis motor; 221, driving gear; 300, bottom plate; 310, air transmission mechanism; 311, air pump; 312, air extraction pipe; 313, air outlet pipe; 314, annular pipe; 315, connecting pipe; 400, top plate; 410, crushing box; 4 11. Feed hopper; 412. Sealing plug; 413. Shaft; 414. Crushing roller; 415. Driven gear; 416. Raised strip; 417. Filter cartridge; 418. Beating assembly; 4181. Mounting plate; 4182. Spring; 4183. Connecting rod; 4184. Rubber ball; 419. Air injection pipe; 420. Feed hopper; 421. Feed pipe; 422. Valve; 423. Second plug plate; 500. Adjustment mechanism; 510. Horizontal plate; 520. Adjustment assembly; 521. Threaded barrel; 522. Threaded rod; 523. Turntable; 530. Sliding rod; 540. First I-shaped member; 550. Second I-shaped member; 560. Third I-shaped member; 570. Limiting plug rod. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments and drawings. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without making any creative work are all within the scope of protection of the present invention.

[0035] Specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0036] Example 1

[0037] like Figures 1-6 As shown, a jet mill includes a grinding chamber body 100 , a bottom plate 300 , a top plate 400 and an adjustment mechanism 500 .

[0038] The grinding chamber body 100 is composed of an upper grinding chamber 110, a middle grinding chamber 120, and a lower grinding chamber 130, which are connected in sequence from top to bottom. A first groove 152 is defined on the top surfaces of each of the upper, middle, and lower grinding chambers 110, 120, and 130. A first plug-in plate 153 is mounted on the bottom surfaces of each of the upper and middle grinding chambers 110, 120, and 130, respectively, to match the first groove 152. Multiple nozzles 131 are installed through the side of the lower grinding chamber 130, equidistantly spaced. A coarse material outlet pipe 132 is installed at the bottom of the lower grinding chamber 130, with a sealing cap 140 threadedly connected to its lower end. A feed pipe 121 is installed through the side of the middle grinding chamber 120. Two fixing plates 150 are mounted on the sides of each of the upper, middle, and lower grinding chambers 110, 120, and 130.

[0039] The bottom plate 300 supports the grinding chamber body 100 and is provided with a storage slot that matches the lower grinding chamber 130, allowing the lower grinding chamber 130 to be placed within the slot. The top plate 400 is located above the grinding chamber body 100 and is provided with a sorting chamber 200 that matches the grinding chamber body 100. An adjustment mechanism 500 is used to adjust the distance between the bottom plate 300 and the top plate 400.

[0040] Specifically, when the adjustment mechanism 500 adjusts the distance between the bottom plate 300 and the top plate 400 to be smaller, the distance between the upper grinding chamber 110, the lower grinding chamber 130 and the middle grinding chamber 120 will also become smaller, so that the middle grinding chamber 120 is plugged into the upper grinding chamber 110 and the lower grinding chamber 130; when the adjustment mechanism 500 adjusts the distance between the bottom plate 300 and the top plate 400 to be larger, the distance between the upper grinding chamber 110, the lower grinding chamber 130 and the middle grinding chamber 120 will also become larger, so that the middle grinding chamber 120 is separated from the upper grinding chamber 110 and the lower grinding chamber 130.

[0041] like Figure 1-Figure 7 As shown, the adjustment mechanism 500 includes two transverse plates 510 , two adjustment assemblies 520 and four sliding rods 530 .

[0042] The two transverse plates 510 are both located below the bottom plate 300 ; the two adjustment components 520 are respectively installed on the top surfaces of the two transverse plates 510 , and the adjustment components 520 are used to adjust the distance between the transverse plates 510 and the bottom plate 300 .

[0043] The four slide bars 530 are respectively installed on the top surfaces of the two horizontal plates 510. The slide bars 530 pass through the bottom plate 300 and are fixedly connected to the bottom surface of the top plate 400. A slide cylinder is installed on the bottom plate 300. The slide bars 530 pass through the slide cylinder and are slidably connected to the slide cylinder.

[0044] A first I-beam 540, a second I-beam 550, and a third I-beam 560 are fixedly connected to the two slide bars 530 near the grinding chamber body 100. The I-beams consist of two transverse plates and a vertical plate. The height of the first I-beam 540 is less than that of the second I-beam 550, which in turn is less than that of the third I-beam 560. The transverse plates of the first, second, and third I-beams 540, 550, 560 are all the same height. The fixed plates 150 on the upper grinding chamber 110, the middle grinding chamber 120, and the lower grinding chamber 130 are located within the first, second, and third I-beams 540, 550, 560, respectively.

[0045] Adjustment assembly 520 includes a threaded barrel 521, a threaded rod 522, and a rotary disk 523. The threaded barrel 521 is rotatably mounted on the top surface of the horizontal plate 510. The threaded rod 522 is threadedly connected to the barrel 521, and the upper end of the threaded rod 522 is fixedly connected to the bottom surface of the base plate 300. The rotary disk 523 is fixedly mounted on the surface of the threaded barrel 521. The height of the threaded rod 522 is greater than the combined height of the first I-beam 540, the second I-beam 550, and the third I-beam 560.

[0046] Specifically, when the turntable 523 is rotated, the threaded barrel 521 is driven to rotate, and the threaded rod 522 is driven to move, thereby adjusting the distance between the horizontal plate 510 and the bottom plate 300, and further adjusting the distance between the top plate 400 and the bottom plate 300.

[0047] When the distance between the top plate 400 and the bottom plate 300 gradually decreases, the first I-shaped member 540, the second I-shaped member 550 and the third I-shaped member 560 on the slide bar 530 will push the fixing plates 150 on the upper grinding chamber 110, the middle grinding chamber 120 and the lower grinding chamber 130 downwards respectively, so that the upper grinding chamber 110, the middle grinding chamber 120 and the lower grinding chamber 130 are plugged together; when the distance between the top plate 400 and the bottom plate 300 gradually increases, the first I-shaped member 540, the second I-shaped member 550 and the third I-shaped member 560 on the slide bar 530 will lift up the fixing plates 150 on the upper grinding chamber 110, the middle grinding chamber 120 and the lower grinding chamber 130 respectively, so that the upper grinding chamber 110, the lower grinding chamber 130 and the middle grinding chamber 120 are separated.

[0048] like Figure 2-Figure 4 and Figure 6As shown, in order to prevent the upper grinding chamber 110, the middle grinding chamber 120 and the lower grinding chamber 130 from rotating after being plugged in, a limiting hole 151 is opened through the fixed plate 150, and a limiting plug rod 570 is installed on the first I-shaped member 540, the second I-shaped member 550 and the third I-shaped member 560. When the upper grinding chamber 110, the middle grinding chamber 120 and the lower grinding chamber 130 are plugged in to each other, the limiting plug rod 570 is inserted into the limiting hole 151, thereby preventing the upper grinding chamber 110, the middle grinding chamber 120 and the lower grinding chamber 130 from rotating.

[0049] like Figures 1-4 、 Figure 7 and Figure 8 As shown, a cover plate 210 is installed on the top surface of the sorting chamber 200, a fine material outlet pipe 201 is installed through the side of the sorting chamber 200, a dual-axis motor 220 is installed on the side of the sorting chamber 200, one power output shaft of the dual-axis motor 220 extends into the sorting chamber 200, and a classifying impeller 202 is installed on the power output shaft, one end of the classifying impeller 202 extends into the fine material outlet pipe 201 and is rotatably connected to the fine material outlet pipe 201.

[0050] When the upper grinding chamber 110, the middle grinding chamber 120 or the lower grinding chamber 130 is damaged and needs to be replaced: by rotating the two turntables 523 at the same time, the two threaded cylinders 521 are driven to rotate at the same time, and then the two threaded rods 522 are moved into the inside of the threaded cylinders 521 at the same time, causing the bottom plate 300 to move downward. When the bottom plate 300 moves downward, the upper grinding chamber 110, the middle grinding chamber 120 and the lower grinding chamber 130 will all move downward.

[0051] As the bottom plate 300 continues to move downward, the first I-shaped member 540 will support the fixing plate 150 on the surface of the upper grinding chamber 110, so that the upper grinding chamber 110 cannot move further downward. At this time, the upper grinding chamber 110 is separated from the sorting chamber 200.

[0052] As the bottom plate 300 continues to move downward, the second I-shaped member 550 will support the fixing plate 150 on the surface of the intermediate grinding chamber 120, so that the intermediate grinding chamber 120 cannot move further downward. At this time, the upper grinding chamber 110 and the intermediate grinding chamber 120 have been separated.

[0053] As the bottom plate 300 continues to move downward, the third I-shaped member 560 will support the fixing plate 150 on the surface of the lower grinding chamber 130, so that the lower grinding chamber 130 cannot move further downward. At this time, the middle grinding chamber 120 and the lower grinding chamber 130 are separated.

[0054] Then, the damaged grinding chamber part is taken out to facilitate the replacement of the damaged grinding chamber part.

[0055] Then place the fixing plate 150 of the new grinding chamber part on the corresponding I-shaped piece, and adjust the position of the fixing plate 150 so that the limiting hole 151 on the fixing plate 150 faces the limiting rod 570 on the I-shaped piece.

[0056] Then, by simultaneously rotating the two turntables 523 in opposite directions, the two threaded cylinders 521 are driven to rotate simultaneously, thereby causing the two threaded rods 522 to move upward at the same time, causing the bottom plate 300 to move upward, thereby pushing the upper grinding chamber 110, the middle grinding chamber 120 and the lower grinding chamber 130 to move upward. As the distance between the top plate 400 and the bottom plate 300 decreases, the sorting chamber 200 will be connected to the upper grinding chamber 110, and the first plugging plate 153 at the bottom of the upper grinding chamber 110 will be inserted into the first groove 152 on the top surface of the middle grinding chamber 120. The first plugging plate 153 on the bottom surface of the middle grinding chamber 120 is inserted into the first groove 152 on the top surface of the lower grinding chamber 130, thereby connecting the upper grinding chamber 110, the middle grinding chamber 120 and the lower grinding chamber 130 together, thereby completing the replacement of the partially damaged grinding chamber, thereby reducing the replacement cost; when part of the grinding chamber is damaged, only the damaged part of the grinding chamber needs to be removed, and there is no need to disassemble the entire grinding chamber and then replace the part of the grinding chamber, thereby reducing the time cost of replacement.

[0057] Example 2

[0058] like Figure 1 、 Figure 2 、 Figure 7 and Figure 8 As shown, while all other aspects are identical to those of Example 1, this embodiment differs from Example 1 in that: a crushing box 410 is mounted on the top surface of the top plate 400. Two shafts 413 are rotatably mounted within the crushing box 410, one end of each shaft 413 extending outside the crushing box 410. A driven gear 415 is mounted on the end of the shaft 413 facing outside the crushing box 410. The driven gear 415 meshes with the driving gear 221 mounted on the power output shaft of the dual-shaft motor 220. A crushing roller 414 is fixedly mounted on the portion of the shaft 413 located within the crushing box 410. A feed hopper 411 is mounted through the top surface of the crushing box 410, with a sealing plug 412 inserted into the feed hopper 411. An air injection pipe 419 is mounted through the side of the crushing box 410.

[0059] Specifically, the magnetic powder alloy fragments to be processed are added into the crushing box 410 so that the magnetic powder alloy fragments fall onto the two crushing rollers 414, and then the feed hopper 411 is sealed by using the sealing plug 412; then, the nitrogen delivery pipe is connected to the gas injection pipe 419 to deliver nitrogen into the crushing box 410, and then the dual-axis motor 220 is started so that the power output shaft of the dual-axis motor 220 drives the driving gear 221 to rotate, and then engages and drives the two driven gears 415 to rotate, thereby driving the two shafts 413 and the two crushing rollers 414 to rotate, so that the two crushing rollers 414 crush the magnetic powder alloy fragments; and since nitrogen is introduced when the magnetic powder alloy fragments are crushed, the nitrogen can reduce the temperature of the magnetic powder alloy fragments and prevent the magnetic powder alloy fragments from being oxidized during crushing.

[0060] like Figure 1 、 Figure 2 、 Figure 9 and Figure 10 As shown, a feed hopper 420 is installed on the bottom surface of the crushing box 410, a feed pipe 421 is installed on the bottom surface of the feed hopper 420, a valve 422 is installed on the feed pipe 421, and a second plug plate 423 matching the second groove 122 is installed on the bottom surface of the feed pipe 421. By setting the second plug plate 423 and the second groove 122, the feed pipe 421 is easily connected to the feed pipe 121.

[0061] A filter cartridge 417 is mounted on the top surface of the crushing box 410. The top and bottom surfaces of the filter cartridge 417 are solid surfaces, and the side surfaces of the filter cartridge 417 are filtering surfaces. An air delivery mechanism 310 is mounted on the top surface of the base plate 300. The air delivery mechanism 310 includes an air pump 311, an annular tube 314, and multiple connecting tubes 315. The air pump 311 is mounted on the top surface of the base plate 300. An air extraction pipe 312 and an air outlet pipe 313 are mounted on the air pump 311. The other end of the air extraction pipe 312 is fixedly connected to and communicates with the filter cartridge 417. The air extraction pipe 312 of the air pump 311 is a flexible hose with a certain degree of deformation. The annular tube 314 is mounted on the top surface of the base plate 300. The annular tube 314 is fixedly connected to and communicates with the air outlet pipe 313. One end of the multiple connecting tubes 315 is fixedly connected to and communicates with the annular tube 314, and the other end of the multiple connecting tubes 315 is connected to the nozzle 131.

[0062] Specifically, when the air pump 311 is running, the gas in the crushing box 410 is extracted and transported to the annular pipe 314 , and then transported to the nozzle 131 through the multiple connecting pipes 315 .

[0063] When using the jet mill: the magnetic powder alloy fragments to be processed are added into the crushing box 410, so that the magnetic powder alloy fragments fall onto the two crushing rollers 414, and then the feed hopper 411 is sealed by using the sealing plug 412.

[0064] Then, by connecting the nitrogen delivery pipe to the gas injection pipe 419, nitrogen is delivered to the crushing box 410, and then by starting the dual-axis motor 220, the power output shaft of the dual-axis motor 220 drives the driving gear 221 to rotate, and then engages and drives the two driven gears 415 to rotate, thereby driving the two shafts 413 and the two crushing rollers 414 to rotate, so that the two crushing rollers 414 crush the magnetic powder alloy fragments; and because nitrogen is introduced when the magnetic powder alloy fragments are crushed, the nitrogen can reduce the temperature of the magnetic powder alloy fragments and prevent the magnetic powder alloy fragments from being oxidized during crushing.

[0065] Then, by opening the valve 422, the crushed magnetic powder alloy fragments in the crushing box 410 are added into the grinding chamber body 100 through the feed pipe 121. Then, by starting the air pump 311, the gas in the crushing box 410 is filtered through the filter cartridge 417 and then extracted and transported to the annular pipe 314. The gas is then transported to the nozzle 131 through multiple connecting pipes 315. The gas ejected from the nozzle 131 further crushes the magnetic powder alloy fragments in the grinding chamber body 100. The gas entering the grinding chamber body 100 contains nitrogen, which can prevent the magnetic powder alloy fragments from oxidizing during crushing in the grinding chamber body 100.

[0066] Example 3

[0067] like Figure 10 and Figure 11 As shown, when other parts are the same as those in Example 1, the difference between this embodiment and Example 1 is that a convex strip 416 is installed on the part of any shaft 413 located in the crushing box 410, and a striking assembly 418 is installed on the bottom surface of the filter cartridge 417. The striking assembly 418 includes: a mounting plate 4181, two springs 4182 and two connecting rods 4183.

[0068] The mounting plate 4181 is T-shaped, one end of the two springs 4182 is fixedly connected to the top surface of the mounting plate 4181, and the other ends of the two springs 4182 are fixedly connected to the bottom surface of the filter cartridge 417; the two connecting rods 4183 are respectively installed on both sides of the mounting plate 4181, and the other ends of the two connecting rods 4183 are installed with rubber balls 4184.

[0069] When the air flow mill is in use: when the dual-axis motor 220 drives the two driven gears 415 to rotate through the driving gear 221, it will drive the two shafts 413 to rotate. When the shafts 413 rotate, the protrusions 416 will rotate. The rotating protrusions 416 will move the mounting plate 4181, and the mounting plate 4181 will shake under the action of the spring 4182, thereby driving the connecting rod 4183 and the rubber ball 4184 to move, so that the rubber ball 4184 hits the filter cartridge 417, thereby causing the filter cartridge 417 to vibrate, which will shake off the debris attached to the surface of the filter cartridge 417, thereby preventing the debris from clogging the filter holes of the filter cartridge 417 and affecting the filtration efficiency.

[0070] Example 4

[0071] While other parts are the same as those in Example 1, the difference between this embodiment and Example 1 is that the adjustment component 520 is a hydraulic cylinder (not shown), and the maximum extension length of the hydraulic cylinder is greater than the sum of the heights of the first I-beam 540, the second I-beam 550 and the third I-beam 560.

[0072] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

[0073] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A jet mill, characterized in that: include: The grinding chamber body is composed of an upper grinding chamber, a middle grinding chamber and a lower grinding chamber connected in sequence from top to bottom, and two fixing plates are installed on the sides of the upper grinding chamber, the middle grinding chamber and the lower grinding chamber; Bottom plate, used to support the grinding chamber body; A top plate is located above the grinding chamber body, and a sorting chamber matching the grinding chamber body is installed through the top plate; An adjustment mechanism, used for adjusting the distance between the bottom plate and the top plate; When the adjustment mechanism adjusts the distance between the bottom plate and the top plate, the horizontal heights of the upper grinding chamber, the middle grinding chamber and the lower grinding chamber will change; The regulating mechanism comprises: two horizontal plates, both located below the base plate; Two adjustment components are respectively installed on the top surfaces of the two horizontal plates to adjust the distance between the horizontal plates and the bottom plate; Four sliding rods are respectively installed on the top surfaces of the two horizontal plates. The sliding rods pass through the bottom plate and are fixedly connected to the bottom surface of the top plate. The first I-shaped piece, the second I-shaped piece and the third I-shaped piece are installed on the two sliding rods close to the grinding chamber body. The height of the first I-shaped piece is smaller than the height of the second I-shaped piece, and the height of the second I-shaped piece is smaller than the height of the third I-shaped piece; the fixed plates on the upper grinding chamber, the middle grinding chamber and the lower grinding chamber are respectively located in the first I-shaped piece, the second I-shaped piece and the third I-shaped piece.

2. The jet mill according to claim 1, characterized in that: The adjustment component includes: The threaded cylinder is rotatably mounted on the top surface of the horizontal plate; A threaded rod, threadedly connected to the threaded barrel, with its upper end fixedly connected to the bottom surface of the base plate; The turntable is fixedly sleeved on the surface of the threaded cylinder.

3. The jet mill according to claim 1, characterized in that: A cover plate is installed on the top surface of the sorting chamber, a fine material outlet pipe is installed through the side of the sorting chamber, a dual-shaft motor is installed on the side of the sorting chamber, a power output shaft of the dual-shaft motor extends into the sorting chamber, and a grading impeller is installed on the power output shaft.

4. The jet mill according to claim 3, characterized in that: The top surfaces of the upper grinding chamber, the middle grinding chamber and the lower grinding chamber are all provided with a first groove, and the bottom surfaces of the upper grinding chamber and the middle grinding chamber are both installed with a first plug plate matching the first groove; a plurality of nozzles are installed through the side surface of the lower grinding chamber, and a coarse material outlet pipe is installed at the bottom of the lower grinding chamber; a feed pipe is installed through the side surface of the middle grinding chamber.

5. The jet mill according to claim 4, characterized in that: A crushing box is installed on the top surface of the top plate, and two shafts are rotatably installed in the crushing box. One end of the two shafts extends outside the crushing box, and a driven gear is installed on the end of the shaft outside the crushing box. The driven gear is meshed with a driving gear installed on the power output shaft of the dual-axis motor; a crushing roller is fixedly sleeved on the part of the shaft located in the crushing box.

6. The jet mill according to claim 5, characterized in that: A feed hopper is installed through the top surface of the crushing box, and a sealing plug is inserted into the feed hopper; an air injection pipe is installed through the side surface of the crushing box.

7. The jet mill according to claim 6, characterized in that: A feeding hopper is installed on the bottom surface of the crushing box, a feeding pipe is installed on the bottom surface of the feeding hopper, a valve is installed on the feeding pipe, and a second plug plate matching the second groove is installed on the bottom surface of the feeding pipe.

8. The jet mill according to claim 5, characterized in that: A convex strip is installed on the portion of any of the shafts located in the crushing box, a filter cartridge is installed on the top surface of the crushing box, and a striking assembly is installed on the bottom surface of the filter cartridge, and the striking assembly includes: Mounting plate; Two springs, one end of which is fixedly connected to the mounting plate, and the other end of which is fixedly connected to the bottom surface of the filter cartridge; Two connecting rods are respectively installed on both sides of the mounting plate, and the other ends of the two connecting rods are both installed with rubber balls.

9. The jet mill according to claim 8, characterized in that A gas delivery mechanism is installed on the top surface of the bottom plate, and the gas delivery mechanism includes: An air pump is mounted on the top surface of the bottom plate. An air extraction pipe and an air outlet pipe are mounted on the air pump. The other end of the air extraction pipe is fixedly connected to and communicated with the filter cartridge. an annular tube, mounted on the top surface of the base plate, the annular tube being fixedly connected to and in communication with the air outlet pipe; A plurality of connecting pipes have one end fixedly connected to and communicated with the annular pipe, and the other end connected to the nozzle.

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