Airflow mill with double grinding chambers

Abstract

The invention relates to the technical field of crushing engineering, and discloses a double-grinding-chamber jet mill which comprises a base support, a connecting support is fixedly connected to the upper surface of the base support, a first box is fixedly connected to the top of the connecting support, and an air inlet mechanism is fixedly connected to the outer surface of the first box. A first motor is fixedly connected to the left side of the first box body, a transmission mechanism is rotatably connected to the output end of the first motor, a grading wheel is rotatably connected to the inner surface of the transmission mechanism, a feeding port is fixedly connected to the right side of the first box body, and a grinding chamber replacing mechanism is clamped in the first box body. And a sealing positioning mechanism and a positioning filtering mechanism are fixedly connected to the inner wall of the first box body, so that the grinding chamber influencing the working efficiency is replaced, preliminary positioning and fixing are performed, the flexibility and reliability of the equipment are greatly improved, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of pulverizing engineering, in particular to a double-grinding-chamber airflow mill. Background Art

[0002] In modern industrial production, the demand for fine powders is growing. Although traditional grinding technologies, such as ball mills and rod mills, can meet the demand for material crushing to a certain extent, they have many limitations, such as low grinding efficiency, uneven product particle size distribution, severe equipment wear, and high energy consumption. In order to solve the limitations of traditional grinding technology, the airflow mill technology came into being. The airflow mill is a device that uses high-speed airflow to crush materials. It has the following advantages: high grinding efficiency, uniform product particle size distribution, and low energy consumption. With the continuous advancement of industrial technology, the quality and performance requirements of powder products are getting higher and higher. In some specific application fields, such as electronic materials, medicine, and chemicals, more refined powder products with narrower particle size distribution are required. The single-chamber airflow mill cannot meet these requirements when processing certain materials; therefore, the double-chamber airflow mill came into being. The double-chamber airflow mill can grind the material twice by setting up two grinding chambers, further improving the grinding effect and obtaining a finer product with a narrower particle size distribution. At the same time, the double-grinding-chamber air jet mill can flexibly adjust the parameters of the two grinding chambers according to different material characteristics and production requirements to achieve personalized grinding technology.

[0003] In modern industrial production, the double-chamber jet mill is an important powder processing equipment and is widely used in various fields. However, due to the long-term operation, the grinding chamber and nozzle will inevitably be subjected to high-speed impact and friction of the material, resulting in severe wear. The existing double-chamber jet mill structure design is often more complicated, and the operation of replacing the grinding chamber and nozzle is cumbersome and time-consuming. Since the worn grinding chamber cannot be quickly replaced, the equipment needs to be shut down for maintenance, which will undoubtedly extend the production cycle and reduce production efficiency. Summary of the invention

[0004] The object of the present invention is to provide a double-grinding-chamber airflow mill to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-grinding chamber airflow mill, comprising a base bracket, the upper surface of the base bracket is fixedly connected to a connecting bracket, the top of the connecting bracket is fixedly connected to a first box, the outer surface of the first box is fixedly connected to an air intake mechanism, the left side of the first box is fixedly connected to a first motor, the output end of the first motor is rotatably connected to a transmission mechanism, the inner surface of the transmission mechanism is rotatably connected to a grading wheel, the right side of the first box is fixedly connected to a feed port, the interior of the first box is clamped with a grinding chamber replacement mechanism, the inner wall of the first box is fixedly connected to a sealing positioning mechanism and a positioning filtering mechanism, and further comprising: A grinding chamber replacement mechanism, the grinding chamber replacement mechanism includes a first grinding chamber, the top of the first grinding chamber is clamped with a groove opened at the bottom of the inner wall of the first box body through a fixedly connected annular clamping block, the inner wall of the first grinding chamber is fixedly connected with a nozzle, the top of the first grinding chamber is fixedly connected with a narrow-mouth connecting pipe through a through hole, the top of the first box body is connected with a cover plate by threads, and the lower surface of the cover plate is clamped with a second grinding chamber through a fixedly connected annular clamping block.

[0006] According to the above technical solution, the grinding chamber replacement mechanism also includes a first connecting block, which is fixedly connected to the inner wall of the first box body, and the outer surface of the first connecting block is fixedly connected to a rotating shaft connecting block, and the rotating shaft connecting block is rotatably connected to a second connecting block via a rotating shaft, and the top of the second connecting block is fixedly connected to a hydraulic pump, and the output end of the hydraulic pump is fixedly connected to an arc-shaped clamping plate, and the outer surface of the output end of the hydraulic pump is fixedly connected to a flexible protective cover.

[0007] According to the above technical solution, the sealing positioning mechanism includes a first connecting tube, which is fixedly connected to the inner wall of the first box body, the outer surface of the first connecting tube is fixedly connected to the second box body, the interior of the second box body is fixedly connected to the first rotating shaft, two first rotating shafts are arranged inside the second box body, the outer surface of the first rotating shaft is rotatably connected to the first magnetic baffle, the inner wall of the second box body is rotatably connected to the second magnetic baffle through the rotating shaft, the outer surface of the first grinding chamber is fixedly connected to the arc-shaped connecting block, the inner wall of the second box body is fixedly connected to the spring by opening a card slot, the top of the spring is fixedly connected to the nail-shaped electromagnet, and the interior of the second box body is fixedly connected to the rectangular electromagnet.

[0008] According to the above technical solution, the positioning and filtering mechanism includes a second connecting tube, the outer surface of the second connecting tube is fixedly connected to the positioning mechanism, the side of the second connecting tube is fixedly connected to the third connecting tube, the outer surface of the third connecting tube is fixedly connected to the second motor through a connecting block, the output end of the second motor is fixedly connected to a sealing plate, the bottom of the third connecting tube is fixedly connected to a limiting block, the second connecting tube is fixedly connected to the first valve and the second valve by opening a through hole, the outer surface of the second connecting tube is fixedly connected to the third connecting block, the outer surface of the third connecting block is fixedly connected to the third motor, the output end of the third motor is fixedly connected to a rotating shaft, and the outer surface of the rotating shaft is fixedly connected to the filter plate.

[0009] According to the above technical solution, the outer surface of the arc-shaped clamp is clamped with the outer surface of the second grinding chamber, and two groups of pushing components are fixedly connected to the outer surface of the arc-shaped clamp. There are three groups of pushing components and the arc-shaped clamp rotatably arranged on the outer surface of the second grinding chamber.

[0010] According to the above technical solution, the length of the first magnetic baffle plate and the second magnetic baffle plate is the same as the length of the arc boundary from the inner wall of the second box body to the arc-shaped connecting block, the lower surface of the rectangular electromagnet is in contact with the upper surface of the arc-shaped connecting block, the height of the arc-shaped connecting block is the same as the height of the card slot of the second box body, the width of the first magnetic baffle plate and the second magnetic baffle plate to the inner wall of the second box body is the same as the width of the arc-shaped connecting block, the arc surface of the second box body is in contact with the outer surface of the first grinding chamber, and the sealing positioning mechanism is rotatably arranged in four groups on the outer surface of the first grinding chamber.

[0011] According to the above technical solution, the arc surface of the positioning mechanism contacts the outer surface of the second grinding chamber, the sealing plate is located inside the groove of the limit block and the third connecting tube, the top of the rotating shaft is fixedly connected to the limit cylinder, the rotating shaft, the third motor, the third connecting block and the filter plate are located on the top of the second valve, and a group is arranged between the first valve and the second valve.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This double-grinding-chamber airflow mill, by setting up a grinding chamber replacement mechanism, realizes the replacement of the grinding chamber that affects the work efficiency, and realizes the replacement of a single grinding chamber of the double grinding chamber, and performs preliminary positioning and fixing, which greatly improves the flexibility and reliability of the equipment, reduces the maintenance cost of the equipment, and extends the service life of the equipment.

[0013] 2. This type of double-grinding chamber air flow mill, by setting a sealing positioning mechanism, realizes the positioning and fixation between the grinding chamber and the other components, and realizes the replacement of the nozzle, avoiding the blockage and leakage problems caused by position deviation, and can also optimize the distribution of airflow in the equipment, improve the airflow on the material crushing and conveying efficiency, and reduce the failure rate of the equipment.

[0014] 3. This type of double-grinding chamber airflow mill, by setting a positioning and filtering mechanism, realizes the positioning between the grading system and the grinding chamber, filters the particles ground in the grinding chamber, realizes the preliminary screening of the particles, and realizes the protection of the grading wheel, improves the airflow's carrying and conveying capacity for materials, reduces the workload of the grading system, improves the grading efficiency, and can effectively prevent large particles from clogging and damaging the grading system, ensuring the stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0016] Figure 2 It is a cross-sectional view of the main structure of the present invention.

[0017] Figure 3 It is a structural sectional view of the grinding chamber replacement mechanism of the present invention.

[0018] Figure 4 It is a partial structural schematic diagram of the grinding chamber replacement mechanism of the present invention.

[0019] Figure 5 It is a structural schematic diagram of the sealing positioning mechanism of the present invention.

[0020] Figure 6 It is a structural cross-sectional view of the sealing positioning mechanism of the present invention.

[0021] Figure 7 It is a structural schematic diagram of the positioning filtering mechanism of the present invention.

[0022] Figure 8 This is a structural cross-sectional view of the positioning filter mechanism of the present invention.

[0023] In the figure: 1. Base bracket; 2. Air intake mechanism; 3. Grinding chamber replacement mechanism; 301, first grinding chamber; 302, nozzle; 303, narrow-mouth connecting pipe; 304, second grinding chamber; 305, cover plate; 306, first connecting block; 3001, driving component; 307, shaft connection block; 308, second connection block; 309, hydraulic pump; 310, flexible protective cover; 311, curved splint; 4. Connecting bracket; 5. Feeding port; 6. Sealing positioning mechanism; 601, first connecting pipe; 602, second box; 603, first rotating shaft; 604, first magnetic baffle; 605, second magnetic baffle; 606, arc-shaped connecting block; 607, nail-shaped electromagnet; 608, spring; 609, rectangular electromagnet; 7. First box; 8. Transmission mechanism; 9. Positioning filter mechanism; 901, positioning mechanism; 902, second connecting pipe; 903, third connecting pipe; 904, second motor; 905, sealing plate; 906, limit block; 907, first valve; 908, second valve; 909, rotating shaft; 910, third motor; 911, third connecting block; 912, filter plate; 10. First motor; 11. Classifying wheel. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Example 1: See Figure 1-Figure 4The present invention provides a technical solution: a double-grinding chamber airflow mill, comprising a base bracket 1, a connecting bracket 4 is fixedly connected to the upper surface of the base bracket 1, a first box body 7 is fixedly connected to the top of the connecting bracket 4, an air intake mechanism 2 is fixedly connected to the outer surface of the first box body 7, a first motor 10 is fixedly connected to the left side of the first box body 7, a transmission mechanism 8 is rotatably connected to the output end of the first motor 10, a grading wheel 11 is rotatably connected to the inner surface of the transmission mechanism 8, a feed port 5 is fixedly connected to the right side of the first box body 7, a grinding chamber replacement mechanism 3 is clamped inside the first box body 7, a sealing positioning mechanism 6 and a positioning filtering mechanism 9 are fixedly connected to the inner wall of the first box body 7, and further comprising: The grinding chamber replacement mechanism 3 comprises a first grinding chamber 301, the top of the first grinding chamber 301 is clamped with a clamping groove provided at the bottom of the inner wall of the first box body 7 through a fixedly connected annular clamping block, a nozzle 302 is fixedly connected to the inner wall of the first grinding chamber 301, a narrow-mouth connecting pipe 303 is fixedly connected to the top of the first grinding chamber 301 through a through hole, a cover plate 305 is threadedly connected to the top of the first box body 7, and the lower surface of the cover plate 305 is clamped with the second grinding chamber 304 through a fixedly connected annular clamping block.

[0028] The grinding chamber replacement mechanism 3 also includes a first connecting block 306, which is fixedly connected to the inner wall of the first box body 7, and the outer surface of the first connecting block 306 is fixedly connected to a rotating shaft connecting block 307, and the rotating shaft connecting block 307 is rotatably connected to a second connecting block 308 through a rotating shaft, and the top of the second connecting block 308 is fixedly connected to a hydraulic pump 309, and the output end of the hydraulic pump 309 is fixedly connected to an arc-shaped clamping plate 311, and the outer surface of the output end of the hydraulic pump 309 is fixedly connected to a flexible protective cover 310.

[0029] The outer surface of the arc-shaped clamping plate 311 is clamped with the outer surface of the second grinding chamber 304, and two groups of pushing components 3001 are fixedly connected to the outer surface of the arc-shaped clamping plate 311. There are three groups of pushing components 3001 and arc-shaped clamping plates 311 rotatably arranged on the outer surface of the second grinding chamber 304. By setting up the grinding chamber replacement mechanism 3, the grinding chamber that affects the working efficiency can be replaced through the cover plate 305. The replacement of a single grinding chamber of the double grinding chamber is achieved through the pushing component 3001, and preliminary positioning and fixing are performed, which greatly improves the flexibility and reliability of the equipment, reduces the maintenance cost of the equipment, and extends the service life of the equipment.

[0030] The working principle of this embodiment is as follows: when the double-grinding-chamber jet mill is used, gas is first absorbed by the air intake mechanism 2 and sprayed into the first grinding chamber 301 through the nozzle 302. At the same time, material is put into the first grinding chamber 301 through the feed port 5 and collides with the jet mill. At this time, it enters the second grinding chamber 304 jet mill through the narrow connecting pipe 303 and enters the grading system through the connecting pipe. The first motor 10 rotates and drives the grading wheel 11 through the transmission mechanism 8 to perform grading treatment. Finally, the double-grinding-chamber airflow mill is left. The structure of a conventional airflow mill is not shown. The narrow-mouth connecting pipe 303 ensures a sufficiently long airflow milling time. If the grinding chamber needs to be replaced, the cover plate 305 is rotated to open the top of the first box body 7, and the hydraulic pump 309 is started to move outward, driving the arc-shaped clamping plate 311 to move outward. At this time, the second grinding chamber 304 can be moved out alone, or the first grinding chamber 301 can be moved out after the second grinding chamber 304 is moved out, so as to replace a single or all grinding chambers. After the replacement is completed, the new first grinding chamber 301 is first placed in, and the first grinding chamber 301 is engaged with the card groove of the inner wall of the first box body 7 to achieve preliminary positioning, and then the new second grinding chamber 304 is placed in, and the hydraulic pump 309 pushes the arc-shaped clamping plate 311 inward to contact the outer surface of the second grinding chamber 304 for positioning and fixing. At the same time, the cover plate 305 is fixed by threads, and the cover plate 305 fixes the first grinding chamber 301 and the second grinding chamber 304.

[0031] Example 2: Please refer to Figure 5-Figure 8 On the basis of the first embodiment, the present invention provides a technical solution: the sealing positioning mechanism 6 includes a first connecting tube 601, the first connecting tube 601 is fixedly connected to the inner wall of the first box body 7, the outer surface of the first connecting tube 601 is fixedly connected to the second box body 602, the interior of the second box body 602 is fixedly connected to the first rotating shaft 603, two first rotating shafts 603 are arranged inside the second box body 602, the outer surface of the first rotating shaft 603 is rotatably connected to the first magnetic baffle 604, the inner wall of the second box body 602 is rotatably connected to the second magnetic baffle 605 through the rotating shaft, the outer surface of the first grinding chamber 301 is fixedly connected to the arc-shaped connecting block 606, the inner wall of the second box body 602 is fixedly connected to the spring 608 by opening a slot, the top of the spring 608 is fixedly connected to the nail-shaped electromagnet 607, and the interior of the second box body 602 is fixedly connected to the rectangular electromagnet 609.

[0032] The length of the first magnetic baffle 604 and the second magnetic baffle 605 is the same as the length of the arc boundary from the inner wall of the second box body 602 to the arc-shaped connecting block 606, the lower surface of the rectangular electromagnet 609 is in contact with the upper surface of the arc-shaped connecting block 606, the height of the arc-shaped connecting block 606 is the same as the height of the card slot of the second box body 602, the width of the first magnetic baffle 604 and the second magnetic baffle 605 to the inner wall of the second box body 602 is the same as the width of the arc-shaped connecting block 606, the arc surface of the second box body 602 is in contact with the outer surface of the first grinding chamber 301, and the sealing positioning mechanism 6 is rotatably arranged in four groups on the outer surface of the first grinding chamber 301. By setting the sealing positioning mechanism 6, the positioning and fixation between the grinding chamber and the remaining components are realized through the arc-shaped connecting block 606, and the nozzle 302 is replaced by cooperating with the grinding chamber replacement mechanism 3, thereby avoiding blockage and leakage problems caused by position deviation, and optimizing the distribution of airflow in the equipment, improving the efficiency of airflow in crushing and conveying materials, and reducing the failure rate of the equipment.

[0033] The positioning and filtering mechanism 9 includes a second connecting tube 902, the outer surface of which is fixedly connected to a positioning mechanism 901, the side of the second connecting tube 902 is fixedly connected to a third connecting tube 903, the outer surface of the third connecting tube 903 is fixedly connected to a second motor 904 through a connecting block, the output end of the second motor 904 is fixedly connected to a sealing plate 905, the bottom of the third connecting tube 903 is fixedly connected to a limiting block 906, the second connecting tube 902 is fixedly connected to a first valve 907 and a second valve 908 through a through hole, the outer surface of the second connecting tube 902 is fixedly connected to a third connecting block 911, the outer surface of the third connecting block 911 is fixedly connected to a third motor 910, the output end of the third motor 910 is fixedly connected to a rotating shaft 909, and the outer surface of the rotating shaft 909 is fixedly connected to a filter plate 912.

[0034] The arc surface of the positioning mechanism 901 contacts the outer surface of the second grinding chamber 304, the sealing plate 905 is located inside the card groove of the limit block 906 and the third connecting pipe 903, the top of the rotating shaft 909 is fixedly connected to the limit cylinder, the rotating shaft 909, the third motor 910, the third connecting block 911 and the filter plate 912 are located on the top of the second valve 908, and a group is arranged between the first valve 907 and the second valve 908. By setting the positioning and filtering mechanism 9, the positioning between the grading system and the grinding chamber is achieved through the cooperation with the sealing and positioning mechanism 6, the particles ground in the grinding chamber are filtered by the filter plate 912, the preliminary screening of the particles is achieved, and the protection of the grading wheel 11 is achieved, the carrying and conveying capacity of the airflow for the material is improved, the workload of the grading system is reduced, the grading efficiency is improved, and the large particles can be effectively prevented from blocking and damaging the grading system, thereby ensuring the stable operation of the equipment.

[0035] The working principle of this embodiment is as follows: after completing the initial limiting, precise positioning is required to achieve a sealing effect. After the new first grinding chamber 301 is placed, the arc-shaped connecting block 606 fixedly connected thereto is made to enter the slot of the second box body 602 by rotating the first grinding chamber 301. The first magnetic baffle 604 and the second magnetic baffle 605 are pushed by the nail-shaped electromagnet 607 and the rectangular electromagnet 609 to rotate along the first rotating shaft 603, so that they do not affect the process of the arc-shaped connecting block 606 entering the slot of the second box body 602. After entering, the nail-shaped electromagnet 607 is compressed, driving the spring 608 to be compressed, so that the nail-shaped electromagnet 607 and the rectangular electromagnet 609 change their magnetic properties. The first magnetic baffle plate 604 and the second magnetic baffle plate 605 rotating along the first rotating shaft 603 are attracted, so as to limit the arc-shaped connecting block 606. At this time, the four sets of sealing positioning mechanisms 6 arranged in rotation are coordinated to realize horizontal positioning and sealing. The positioning mechanism 901 performs horizontal positioning and sealing of the second connecting pipe 902 and the second grinding chamber 304 in the same way as the above working process. At this time, the vertical positioning and sealing are realized by the threaded connection between the cover plate 305 and the first box body 7. After the positioning and sealing are completed, the particles passing through the new grinding chamber air flow mill enter the second connecting pipe 902 and are filtered by the filter plate 912. The particles enter the second filter plate 912 set 12 filtering, at this time, the filtered particles between the filter plate 912 and the second filter plate 912 pass through the second valve 908, and after the gas stops, the second valve 908 opens and closes to enter the third connecting tube 903, and the particles after double-layer filtration enter the classification wheel 11, which is rotated by the first motor 10 and drives the classification wheel 11 to be classified through the transmission mechanism 8. The filtered particles on the upper surface of the filter plate 912 are rotated by the third motor 910, which drives the filter plate 912 to rotate at a large angle so that it passes through the second valve 908 and enters the third connecting tube 903. After the particles accumulated at the bottom of the second connecting tube 902 accumulate too much, they pass through the first valve 907 and enter the third connecting tube 903, and the particles located at the second valve 90 8 The third motor 910 at the top can rotate at large and small angles to achieve efficiency adjustment of sieving particles and processing of filtered particles, while the third motor 910 located between the first valve 907 and the second valve 908 can only rotate at a small angle to achieve efficiency adjustment of sieving particles. At this time, when too many filtered particles are accumulated inside the third connecting tube 903, the second motor 904 rotates to drive the sealing plate 905 to rotate, so that the bottom of the third connecting tube 903 opens and closes, allowing the filtered particles to enter the first box body 7. At this time, they enter the first grinding chamber 301 for air flow grinding through the conveying device of the conventional air flow mill not described, and the conveying device not described is positioned and sealed by the set sealing positioning mechanism 6.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-grinding-chamber airflow mill, comprising a base support (1), the upper surface of the base support (1) is fixedly connected to a connecting support (4), the top of the connecting support (4) is fixedly connected to a first box (7), the outer surface of the first box (7) is fixedly connected to an air intake mechanism (2), the left side of the first box (7) is fixedly connected to a first motor (10), the output end of the first motor (10) is rotatably connected to a transmission mechanism (8), the inner surface of the transmission mechanism (8) is rotatably connected to a grading wheel (11), the right side of the first box (7) is fixedly connected to a feed port (5), the interior of the first box (7) is clamped with a grinding chamber replacement mechanism (3), the inner wall of the first box (7) is fixedly connected to a sealing positioning mechanism (6) and a positioning filtering mechanism (9), characterized in that: Also includes: A grinding chamber replacement mechanism (3), the grinding chamber replacement mechanism (3) comprising a first grinding chamber (301), the top of the first grinding chamber (301) being clamped with a clamping groove provided at the bottom of the inner wall of a first box body (7) via a fixedly connected annular clamping block, the inner wall of the first grinding chamber (301) being fixedly connected with a nozzle (302), the top of the first grinding chamber (301) being fixedly connected with a narrow-mouthed connecting pipe (303) via a through hole, the top of the first box body (7) being screwed with a cover plate (305), the lower surface of the cover plate (305) being clamped with a second grinding chamber (304) via a fixedly connected annular clamping block.

2. A double-grinding-chamber jet mill according to claim 1, characterized in that: The grinding chamber replacement mechanism (3) further comprises a first connection block (306), the first connection block (306) being fixedly connected to the inner wall of the first box body (7), the outer surface of the first connection block (306) being fixedly connected to a rotating shaft connection block (307), the rotating shaft connection block (307) being rotatably connected to a second connection block (308) via a rotating shaft, the top of the second connection block (308) being fixedly connected to a hydraulic pump (309), the output end of the hydraulic pump (309) being fixedly connected to an arc-shaped clamping plate (311), and the outer surface of the output end of the hydraulic pump (309) being fixedly connected to a flexible protective cover (310).

3. A double-grinding-chamber jet mill according to claim 1, characterized in that: The sealing positioning mechanism (6) comprises a first connecting tube (601), the first connecting tube (601) being fixedly connected to the inner wall of the first box body (7), the outer surface of the first connecting tube (601) being fixedly connected to the second box body (602), the interior of the second box body (602) being fixedly connected to the first rotating shaft (603), two first rotating shafts (603) being arranged inside the second box body (602), the outer surface of the first rotating shaft (603) being rotatably connected to the first magnetic baffle (604), the inner wall of the second box body (602) being rotatably connected to the second magnetic baffle (605) via the rotating shaft, the outer surface of the first grinding chamber (301) being fixedly connected to the arc-shaped connecting block (606), the inner wall of the second box body (602) being fixedly connected to the spring (608) via a slot, the top of the spring (608) being fixedly connected to the nail-shaped electromagnet (607), and the interior of the second box body (602) being fixedly connected to the rectangular electromagnet (609).

4. A double-grinding-chamber jet mill according to claim 1, characterized in that: The positioning and filtering mechanism (9) comprises a second connecting tube (902), the outer surface of the second connecting tube (902) being fixedly connected to the positioning mechanism (901), the side surface of the second connecting tube (902) being fixedly connected to the third connecting tube (903), the outer surface of the third connecting tube (903) being fixedly connected to the second motor (904) via a connecting block, the output end of the second motor (904) being fixedly connected to a sealing plate (905), the bottom of the third connecting tube (903) being fixedly connected to a limiting block (906), the second connecting tube (902) being fixedly connected to a first valve (907) and a second valve (908) via a through hole, the outer surface of the second connecting tube (902) being fixedly connected to the third connecting block (911), the outer surface of the third connecting block (911) being fixedly connected to the third motor (910), the output end of the third motor (910) being fixedly connected to a rotating shaft (909), and the outer surface of the rotating shaft (909) being fixedly connected to a filtering plate (912).

5. A double-grinding-chamber jet mill according to claim 2, characterized in that: The outer surface of the arc-shaped clamping plate (311) is clamped with the outer surface of the second grinding chamber (304); two groups of pushing components (3001) are fixedly connected to the outer surface of the arc-shaped clamping plate (311); and three groups of pushing components (3001) and the arc-shaped clamping plate (311) are rotatably arranged on the outer surface of the second grinding chamber (304).

6. A double-grinding-chamber jet mill according to claim 3, characterized in that: The length of the first magnetic baffle (604) and the second magnetic baffle (605) is the same as the length of the arc-shaped boundary from the inner wall of the second box body (602) to the arc-shaped connecting block (606); the lower surface of the rectangular electromagnet (609) is in contact with the upper surface of the arc-shaped connecting block (606); the height of the arc-shaped connecting block (606) is the same as the height of the card slot of the second box body (602); the width of the first magnetic baffle (604) and the second magnetic baffle (605) to the inner wall of the second box body (602) is the same as the width of the arc-shaped connecting block (606); the arc surface of the second box body (602) is in contact with the outer surface of the first grinding chamber (301); and four groups of the sealing positioning mechanism (6) are rotatably arranged on the outer surface of the first grinding chamber (301).

7. A double-grinding-chamber jet mill according to claim 4, characterized in that: The arc surface of the positioning mechanism (901) contacts the outer surface of the second grinding chamber (304); the sealing plate (905) is located inside the slot between the limiting block (906) and the third connecting tube (903); the top of the rotating shaft (909) is fixedly connected to the limiting cylinder; the rotating shaft (909), the third motor (910), the third connecting block (911) and the filter plate (912) are located on the top of the second valve (908); and a group is provided between the first valve (907) and the second valve (908).

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