A jet mill for producing azodicarbonamide

Abstract

The present invention relates to the technical field of air flow pulverizers, and specifically to an air flow pulverizer for the production of azodicarbonamide, comprising a base, the upper end of the base is fixedly connected to a top plate, the upper surface of the top plate is fixedly connected to a silo, the lower end of the silo is fixedly connected to a screw feeder body, the screw feeder body is fixedly connected to the lower surface of the top plate, the interior of the base is fixedly connected to a high-pressure air intake machine body, the upper end of the base is fixedly connected to a pulverizing device, and the pulverizing device includes a sealed bin. In the present invention, through the slow and uniform rotation of the air pipe and the high-pressure nozzle, the material particles in the pulverizing chamber, due to the intersection of high-speed airflows ejected by multiple high-pressure nozzles, violent mutual collisions occur at the intersection point, and the impact force generated by these collisions is sufficient to break the material particles, and finally enter the classifier body, and then be discharged from the discharge port to enter the next process, thereby improving the pulverizing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of air flow pulverizers, in particular to an air flow pulverizer for producing azodicarbonamide. Background Art

[0002] In the production process of azodicarbonamide, some traditional crushing equipment used in the early stage, such as ball mills and hammer mills, had many problems. The ball mill mainly impacts and grinds the material through grinding media (steel balls, etc.). Its disadvantage is that the crushing efficiency is relatively low, and for heat-sensitive materials such as azodicarbonamide, the ball mill will generate more heat during long-term grinding, which is easy to cause the decomposition or performance change of azodicarbonamide. The existing air flow mill achieves ultra-fine crushing of particles by accelerating the material to converge at the intersection of the jet airflows of several nozzles, resulting in violent collision, friction, and shearing.

[0003] Existing patent (publication number: CN 106311440 B) discloses a gas flow pulverizing unit, characterized in that the gas flow pulverizer comprises a feeding mechanism, a pulverizing mechanism, a screening mechanism, a collecting mechanism and an auxiliary mechanism; the feeding mechanism comprises a feeding hopper and a spiral feeder, the lower end discharge port of the feeding hopper is connected to the feeding port of the spiral feeder, the spiral feeder is arranged in parallel, a feeding transition bin is arranged between the feeding mechanism and the pulverizing mechanism, the feeding transition bin is arranged vertically, the feeding transition bin comprises a feeding port I and a discharge port I, the feeding port I and the discharge port I are both provided with a pneumatic butterfly valve I, the discharge port of the spiral feeder is connected to the feeding port I of the feeding transition bin, the gas flow pulverizing unit directly cools the material by liquid nitrogen, thereby making the material to be processed brittle and reducing its elasticity, reaching the brittle point, and obtaining an ultra-fine powder product, but in the prior art, fixed-point jet pulverization is used, which will lead to the limitation of pulverization and make it unevenly pulverized, and azodicarbonamide itself has a certain viscosity, which will cause it to fit with the inside of the pulverizing chamber during pulverization, affecting the pulverization efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide an air flow pulverizer for the production of azodicarbonamide to solve the problems raised in the above-mentioned background technology. To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an air flow pulverizer for the production of azodicarbonamide, comprising a base, the upper end of the base is fixedly connected to a top plate, the upper surface of the top plate is fixedly connected to a silo, the lower end of the silo is fixedly connected to a screw feeder body, the screw feeder body is fixedly connected to the lower surface of the top plate, the interior of the base is fixedly connected to a high-pressure air intake body, which is fixedly connected to the inside of the base. It is a key equipment for providing high-pressure airflow for the entire pulverizing process. The generated high-pressure airflow will participate in multiple links such as material pulverizing and conveying. The upper end of the base is fixedly connected to a pulverizing device, and the pulverizing device includes a sealing bin, which plays a sealing role to prevent leakage of materials and airflow, create a relatively independent and stable internal environment for the pulverizing process, and ensure the airflow in the pulverizing chamber. The sealed bin is fixedly connected to a crushing chamber, which is the core space for the actual crushing of the material. Various internal mechanisms work together to achieve the crushing and refinement of azodicarbonamide. The crushing chamber is rotatably connected to a classifier body, which is rotatably connected to the inside of the crushing chamber. It can screen and grade the material according to the size of the particles. Fine powder that meets the particle size requirements can be discharged through a discharge port fixedly connected to its side, while coarse powder that does not meet the requirements remains in the crushing chamber and continues to be crushed, so as to accurately control the particle size and particle size distribution of the product. The side of the classifier body is fixedly connected to a discharge port, the crushing chamber is fixedly connected to a driving mechanism, the crushing chamber is fixedly connected to a swing mechanism, and the crushing chamber is provided with an auxiliary mechanism.

[0005] Preferably, the driving mechanism includes a sleeve rod, which is rotatably connected inside the crushing chamber, a gear ring is fixedly connected inside the sleeve rod, a planetary gear is rotatably connected inside the sleeve rod, a hollow rod is rotatably connected inside the sleeve rod, teeth are fixedly connected to the outer surface of the hollow rod, and a fan wheel is fixedly connected around the lower end of the hollow rod.

[0006] Preferably, the swing mechanism includes an air pipe, which is fixedly connected to the side of the sleeve rod, and the top end of the air pipe is rotatably connected to a high-pressure nozzle, the inside of the crushing chamber is fixedly connected to an annular inclined slide rail, the surface circumference of the annular inclined slide rail is circumferentially connected to an arc-shaped slide rail, and pulleys are fixedly connected to both sides of the high-pressure nozzle, which are rotatably connected to the top end of the air pipe and are key components for ejecting high-pressure airflow. High-pressure airflow is ejected from here at high speed, generating a strong impact force to cause material particles to collide and rub against each other, thereby achieving the purpose of crushing. The two are integrated into a wavy slide rail, and the inside of the crushing chamber is fixedly connected to this special shape of slide rail, providing a motion track for the pulleys on both sides of the high-pressure nozzle, so that the high-pressure nozzle can make a specific swinging motion along the slide rail, thereby changing the injection direction and angle of the high-pressure airflow, so that the material at different positions in the crushing chamber can be fully impacted by the airflow, further improving the crushing effect and uniformity.

[0007] Preferably, the auxiliary mechanism includes an L-shaped support rod, the L-shaped support rod is fixedly connected to the side of the sleeve rod, the top of the L-shaped support rod is fixedly connected to a sloped scraper, the side of the sloped scraper is provided with a feeding port, the lower end of the other side of the sloped scraper is provided with a discharging port, the inside of the sloped scraper is rotatably connected to two rollers, a transmission belt is transmission-connected between the two rollers, a push plate is fixedly connected to the surface of the transmission belt, the side of the sloped scraper is rotatably connected to bevel gear 1, a transmission belt 1 is transmission-connected between the rotating shaft of the bevel gear 1 and the roller, the bottom end of the sloped scraper is rotatably connected to bevel gear 2, and the lower surface of the bevel gear 2 is fixedly connected to a rubber wheel.

[0008] Preferably, the high-pressure air intake machine body is connected with the hollow rod and the sleeve rod inside the sealed chamber, and three air pipes and high-pressure nozzles are arranged inside the crushing chamber and are all connected with the sleeve rod.

[0009] Preferably, the ring gear meshes with the planetary gears, and the planetary gears mesh with the teeth.

[0010] Preferably, the annular inclined slide rail and the arcuate slide rail are integrated to form a wavy slide rail, and the pulley is embedded inside the annular inclined slide rail and the arcuate slide rail and cannot be separated.

[0011] Preferably, the bevel gear 1 is meshed with the bevel gear 2, and two inclined scrapers are arranged at the temporal part of the crushing chamber, and the two inclined scrapers are in contact with the inner wall of the crushing chamber.

[0012] In the present invention, the air pipe and the high-pressure nozzle rotate slowly and evenly, and the material particles in the crushing chamber collide violently with each other at the intersection point due to the intersection of high-speed airflows ejected by multiple high-pressure nozzles. The impact force generated by these collisions is sufficient to break the material particles, and finally enter the classifier body, and then be discharged from the discharge port to enter the next process, thereby improving the crushing efficiency.

[0013] In the present invention, a height difference is repeatedly formed by two pulleys, one in the annular inclined slide rail and the other in the arc-shaped slide rail, which will drive the high-pressure nozzle to swing back and forth left and right inside the crushing chamber. In this way, the airflow will swing during crushing, resulting in more uniform crushing and further improving the crushing efficiency.

[0014] In the present invention, the rotation of the roller drives the transmission belt to transmit inside the inclined scraper, and the transmission belt drives the push plate on the surface to move when transmitting. When the push plate moves, the raw materials inside the inclined scraper are pushed out from the discharge port, so that the raw materials on the inner wall can be pushed out, which not only improves the crushing efficiency, but also prevents residue inside the crushing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional appearance of the present invention;

[0016] Figure 2 It is a schematic diagram of the side cross-sectional structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the side cross-sectional structure of the crushing chamber of the present invention;

[0018] Figure 4 It is a schematic diagram of the side cross-sectional structure of the pulverizing device of the present invention;

[0019] Figure 5 It is a schematic diagram of the sleeve rod and other structures of the present invention;

[0020] Figure 6 It is a schematic diagram of the side cross-sectional structure of the driving mechanism of the present invention;

[0021] Figure 7 This is a schematic diagram of the internal structure of the pulverizing chamber of the present invention;

[0022] Figure 8 For the present invention Figure 7 A is a schematic diagram of the enlarged structure of the middle part;

[0023] Fig. 9 It is a schematic diagram of the partial structure of the auxiliary mechanism of the present invention;

[0024] Fig.10 It is a schematic diagram of the side sectional structure of the auxiliary mechanism of the present invention.

[0025] In the figure: 1. base; 2. top plate; 3. silo; 4. screw feeder body; 5. high-pressure air intake machine body; 6. crushing device; 7. driving mechanism; 8. swing mechanism; 9. auxiliary mechanism; 61. sealing bin; 62. crushing chamber; 63. classifier body; 64. discharge port; 71. sleeve rod; 72. gear ring; 73. planetary gear; 74. hollow rod; 75. tooth; 76. fan wheel; 81. air pipe; 82. high-pressure nozzle; 83. annular inclined slide rail; 84. arc slide rail; 85. pulley; 91. L-shaped support rod; 92. inclined scraper; 93. feed port; 94. discharge port; 95. roller; 96. transmission belt; 97. push plate; 98. bevel gear one; 99. transmission belt one; 910. gear two; 911. rubber wheel. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figures 1 to 7 The present invention provides a technical solution: an air flow pulverizer for the production of azodicarbonamide, comprising a base 1, a top plate 2 is fixedly connected to the upper end of the base 1, a silo 3 is fixedly connected to the upper surface of the top plate 2, a screw feeder body 4 is fixedly connected to the lower end of the silo 3, the screw feeder body 4 is fixedly connected to the lower surface of the top plate 2, a high-pressure air intake machine body 5 is fixedly connected inside the base 1, a pulverizing device 6 is fixedly connected to the upper end of the base 1, the pulverizing device 6 comprises a sealed bin 61, a pulverizing chamber 62 is fixedly connected inside the sealed bin 61, a classifier body 63 is rotatably connected inside the pulverizing chamber 62, a discharge port 64 is fixedly connected to the side of the classifier body 63, a driving mechanism 7 is fixedly connected inside the pulverizing chamber 62, a swing mechanism 8 is fixedly connected inside the pulverizing chamber 62, and an auxiliary mechanism 9 is arranged inside the pulverizing chamber 62.

[0028] The driving mechanism 7 includes a sleeve rod 71, which is rotatably connected inside the crushing chamber 62, a gear ring 72 is fixedly connected inside the sleeve rod 71, a planetary gear 73 is rotatably connected inside the sleeve rod 71, a hollow rod 74 is rotatably connected inside the sleeve rod 71, a tooth 75 is fixedly connected to the outer surface of the hollow rod 74, a fan wheel 76 is fixedly connected around the lower end of the hollow rod 74, the gear ring 72 meshes with the planetary gear 73, and the planetary gear 73 meshes with the tooth 75.

[0029] The swing mechanism 8 includes an air pipe 81, which is fixedly connected to the side of the sleeve rod 71. The top of the air pipe 81 is rotatably connected to a high-pressure nozzle 82. The inside of the crushing chamber 62 is fixedly connected to an annular inclined slide rail 83, and the surface circumference of the annular inclined slide rail 83 is connected to an arc-shaped slide rail 84. Pulleys 85 are fixedly connected to both sides of the high-pressure nozzle 82. Through the two pulleys 85, one is in the annular inclined slide rail 83 and the other is in the arc-shaped slide rail 84, a height difference is repeatedly formed, which will drive the high-pressure nozzle 82 to swing back and forth in the crushing chamber 62. In this way, the airflow will swing during crushing, which will be more uniformly crushed and further improve the crushing efficiency. The high-pressure air intake machine body 5 is in the sealed chamber with the hollow rod 74 and the sleeve rod 71. The interior of 61 is connected. There are three air pipes 81 and high-pressure nozzles 82 in total in the crushing chamber 62, and all are connected with the sleeve rod 71. The annular inclined slide rail 83 and the arc-shaped slide rail 84 are integrated to form a wavy slide rail. The pulley 85 is embedded in the annular inclined slide rail 83 and the arc-shaped slide rail 84 and cannot be separated. Through the slow and uniform rotation of the air pipe 81 and the high-pressure nozzle 82, the material particles in the crushing chamber 62, due to the intersection of high-speed airflows ejected by multiple high-pressure nozzles 82, violent mutual collisions occur at the intersection point. The impact force generated by these collisions is enough to break the material particles, and finally enter the classifier body 63, and then be discharged from the discharge port 64 to enter the next process, thereby improving the crushing efficiency.

[0030] The auxiliary mechanism 9 includes an L-shaped support rod 91, which is fixedly connected to the side of the sleeve rod 71. The top of the L-shaped support rod 91 is fixedly connected to an inclined scraper 92. A feeding port 93 is provided on the side of the inclined scraper 92. A discharge port 94 is provided at the lower end of the other side of the inclined scraper 92. The interior of the inclined scraper 92 is rotatably connected to two rollers 95. A transmission belt 96 is connected between the two rollers 95. A push plate 97 is fixedly connected to the surface of the transmission belt 96. A bevel gear 98 is rotatably connected to the side of the inclined scraper 92. A transmission belt 99 is connected between the rotating shaft of the bevel gear 98 and the roller 95. The bottom end of the inclined scraper 92 is rotatably connected to Bevel gear 2 910, the lower surface of which is fixedly connected with a rubber wheel 911, bevel gear 1 98 meshes with bevel gear 2 910, and two inclined scrapers 92 are arranged at the temporal part of the crushing chamber 62, and the two inclined scrapers 92 are in contact with the inner wall of the crushing chamber 62, and when the roller 95 rotates, it drives the transmission belt 96 to transmit inside the inclined scraper 92, and when the transmission belt 96 transmits, it drives the push plate 97 on the surface to move, and when the push plate 97 moves, it pushes the raw material inside the inclined scraper 92 out of the discharge port 94, so that the raw material on the inner wall can be pushed out, which not only improves the crushing efficiency, but also prevents the residue inside the crushing chamber 62.

[0031] The use method and advantages of the present invention: When the airflow pulverizer for the production of azodicarbonamide is used, the working process is as follows:

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , as shown;

[0033] When in use, the raw material is first placed into the silo 3, and then pushed into the crushing chamber 62 through the screw feeder body 4, and then the high-pressure air intake machine body 5 jets upward, the gas enters the hollow rod 74, and is ejected from the high-pressure nozzle 82 through the air pipe 81 to crush the azodicarbonamide. At the same time, when the gas enters the hollow rod 74, the gas blows the fan wheel 76 to rotate, and when the fan wheel 76 rotates, it drives the hollow rod 74 to rotate, and when the hollow rod 74 rotates, it drives the teeth 75 to rotate, and when the teeth 75 rotate, it drives the meshing planetary gears 73 to rotate, and when the planetary gears 73 rotate, it drives the meshing gear ring 72 to rotate, and the gear ring 72 drives the sleeve rod 71 to rotate, and the sleeve rod 71 rotates. When it moves, it drives the air pipe 81 and the high-pressure nozzle 82 to rotate, which are input through the planetary gear 75 and output through the ring gear 72, and the planetary gear 73 rotates freely. Part of the power of the tooth 75 is transmitted to the ring gear 72 through the planetary gear 73, and the other part makes the planetary gear 73 revolve, so its rotation speed is reduced, and at the same time, the air pipe 81 and the high-pressure nozzle 82 rotate slowly and evenly. The material particles are in the crushing chamber 62. Due to the intersection of high-speed airflows ejected by multiple high-pressure nozzles 82, the material particles collide violently with each other at the intersection point. The impact force generated by these collisions is enough to break the material particles, and finally enter the classifier body 63, and then be discharged from the discharge port 64 to enter the next process, thereby improving the crushing efficiency.

[0034] At the same time, the rotation of the air pipe 81 and the high-pressure nozzle 82 drives the two pulleys 85 to slide in the annular inclined slide rail 83 and the arcuate slide rail 84. In this way, the two pulleys 85, one in the annular inclined slide rail 83 and the other inside the arcuate slide rail 84, repeatedly form a height difference, which will drive the high-pressure nozzle 82 to swing back and forth inside the crushing chamber 62. In this way, the airflow will swing during crushing, which will make the crushing more uniform and further improve the crushing efficiency.

[0035] At the same time, when the sleeve rod 71 rotates, it also drives the L-shaped support rod 91 to rotate. When the L-shaped support rod 91 rotates, it drives the inclined scraper 92 to rotate on the inner wall of the crushing chamber 62. When crushing, raw materials will adhere to the inner wall of the crushing chamber 62. When the inclined scraper 92 rotates, it will scrape the raw materials into the inside of the feed port 93 through its own inclined surface. At the same time, when the inclined scraper 92 rotates, it drives the rubber wheel 911 at the lower end to rotate. The rubber wheel 911 fits the inner wall of the crushing chamber 62, and when the rubber wheel 911 rotates, it drives the bevel gear 910 When the bevel gear 910 rotates, it drives the meshing bevel gear 1 98 to rotate. When the bevel gear 1 98 rotates, it drives the roller 95 to rotate through the transmission belt 1 99. When the roller 95 rotates, it drives the transmission belt 96 to transmit inside the inclined scraper 92. When the transmission belt 96 transmits, it drives the push plate 97 on the surface to move. When the push plate 97 moves, it pushes the raw materials inside the inclined scraper 92 from the discharge port 94. In this way, the raw materials on the inner wall can be pushed out, which not only improves the crushing efficiency, but also prevents the residue inside the crushing chamber 62.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A jet mill for producing azodicarbonamide, comprising a base (1), characterized in that: The upper end of the base (1) is fixedly connected to a top plate (2), the upper surface of the top plate (2) is fixedly connected to a silo (3), the lower end of the silo (3) is fixedly connected to a screw feeder body (4), the screw feeder body (4) is fixedly connected to the lower surface of the top plate (2), the interior of the base (1) is fixedly connected to a high-pressure air intake machine body (5), the upper end of the base (1) is fixedly connected to a pulverizing device (6), the pulverizing device (6) comprises a sealing bin (61), the sealing bin (61) is fixedly connected to the surface of the base (1), the interior of the sealing bin (61) is fixedly connected to a pulverizing chamber (62), the interior of the pulverizing chamber (62) is rotatably connected to a classifier body (63), the side of the classifier body (63) is fixedly connected to a discharge port (64), the interior of the pulverizing chamber (62) is fixedly connected to a driving mechanism (7), the interior of the pulverizing chamber (62) is fixedly connected to a swing mechanism (8), and the interior of the pulverizing chamber (62) is provided with an auxiliary mechanism (9); The auxiliary mechanism (9) comprises an L-shaped support rod (91), the L-shaped support rod (91) being fixedly connected to the side of the sleeve rod (71), the top end of the L-shaped support rod (91) being fixedly connected to an inclined scraper (92), the side of the inclined scraper (92) being provided with a material inlet (93), the lower end of the other side of the inclined scraper (92) being provided with a material discharge port (94), the interior of the inclined scraper (92) being rotatably connected to two rollers (95), the two rollers ( A transmission belt (96) is connected between the inclined scraper (92) and the roller (95), a push plate (97) is fixedly connected to the surface of the transmission belt (96), a bevel gear (98) is rotatably connected to the side of the inclined scraper (92), a transmission belt (99) is connected between the rotating shaft of the bevel gear (98) and the roller (95), the bottom end of the inclined scraper (92) is rotatably connected to the bevel gear (910), and a rubber wheel (911) is fixedly connected to the lower surface of the bevel gear (910); When the sleeve rod (71) rotates, it also drives the L-shaped support rod (91) to rotate. When the L-shaped support rod (91) rotates, it drives the inclined scraper (92) to rotate on the inner wall of the crushing chamber (62). When crushing, raw materials will adhere to the inner wall of the crushing chamber (62). When the inclined scraper (92) rotates, it will scrape the raw materials into the inside of the feed port (93) through its own inclined surface. At the same time, when the inclined scraper (92) rotates, it drives the rubber wheel (911) at the lower end to rotate. The rubber wheel (911) is in contact with the inner wall of the crushing chamber (62). When the wheel (911) rotates, it drives the bevel gear 2 (910) to rotate. When the bevel gear 2 (910) rotates, it drives the meshing bevel gear 1 (98) to rotate. When the bevel gear 1 (98) rotates, it drives the roller (95) to rotate through the transmission belt 1 (99). When the roller (95) rotates, it drives the transmission belt (96) to transmit inside the inclined scraper (92). When the transmission belt (96) transmits, it drives the push plate (97) on the surface to move. When the push plate (97) moves, it pushes the raw materials inside the inclined scraper (92) out of the discharge port (94).

2. The air flow mill for producing azodicarbonamide according to claim 1, characterized in that: The driving mechanism (7) comprises a sleeve rod (71), the sleeve rod (71) being rotatably connected inside the pulverizing chamber (62), a gear ring (72) being fixedly connected inside the sleeve rod (71), a planetary gear (73) being rotatably connected inside the sleeve rod (71), a hollow rod (74) being rotatably connected inside the sleeve rod (71), teeth (75) being fixedly connected to the outer surface of the hollow rod (74), and a fan wheel (76) being fixedly connected around the lower end of the hollow rod (74).

3. The air flow mill for producing azodicarbonamide according to claim 1, characterized in that: The swing mechanism (8) comprises an air pipe (81), the air pipe (81) being fixedly connected to a side surface of a sleeve rod (71), the top end of the air pipe (81) being rotatably connected to a high-pressure nozzle (82), the interior of the crushing chamber (62) being fixedly connected to an annular inclined slide rail (83), the surface circumference of the annular inclined slide rail (83) being circumferentially connected to an arcuate slide rail (84), and pulleys (85) being fixedly connected to both sides of the high-pressure nozzle (82).

4. The air flow mill for producing azodicarbonamide according to claim 3, characterized in that: The high-pressure air intake machine body (5) is in communication with the hollow rod (74) and the sleeve rod (71) inside the sealing chamber (61); three air pipes (81) and high-pressure nozzles (82) are provided inside the crushing chamber (62) and are in communication with the sleeve rod (71).

5. The air flow mill for producing azodicarbonamide according to claim 2, characterized in that: The ring gear (72) meshes with the planetary gears (73), and the planetary gears (73) mesh with the teeth (75).

6. The air flow mill for producing azodicarbonamide according to claim 3, characterized in that: The annular inclined slide rail (83) and the arc-shaped slide rail (84) are integrated to form a wave-shaped slide rail, and the pulley (85) is embedded inside the annular inclined slide rail (83) and the arc-shaped slide rail (84) and cannot be separated.

7. The air flow mill for producing azodicarbonamide according to claim 4, characterized in that: The bevel gear 1 (98) is meshed with the bevel gear 2 (910), and two inclined scrapers (92) are arranged inside the crushing chamber (62), and the two inclined scrapers (92) are in contact with the inner wall of the crushing chamber (62).

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