Multi-low-temperature pulverizer

Abstract

The utility model discloses a multi-low-temperature pulverizer which comprises a quantitative blanking part, a freezing conveying part, a pulverizing part and a separating part, the quantitative discharging part comprises a feeding hopper, the lower end of the feeding hopper is connected to the freezing conveying part through a discharging pipe, a feeding impeller is rotationally connected to the discharging pipe, a plurality of fins are distributed on the feeding impeller in the circumferential direction, a quantitative feeding groove is formed between every two adjacent fins, and the rotating speed of the feeding impeller is controlled to adjust the quantitative discharging speed. The multi-low-temperature smashing unit has the advantages of being stable in technical performance, low in noise, low in power consumption, high in production efficiency, ultralow in temperature, attractive in appearance, small in occupied area and the like, the granularity and fineness of products can be controlled according to the rotating speed of the smashing cutter head, the particle size can be adjusted at will, the smashing temperature rise is ultralow due to the arranged freezing conveying part, and the smashing effect is good. Therefore, the crusher is particularly suitable for crushing heat-sensitive materials such as sugar, plastic powder and traditional Chinese medicinal materials. The unit is ideal ultralow-temperature crushing equipment in the industries of plastics, rubber, pharmacy, food, chemical engineering and the like.

Description

Technical Field

[0001] The utility model relates to the field of pulverizing equipment, in particular to a variety of low-temperature pulverizers. Background Art

[0002] The pulverizer is a machine that crushes large solid raw materials into required sizes. The pulverizer consists of coarse crushing, fine crushing, wind conveying and other devices, and achieves the purpose of the pulverizer in the form of high-speed impact. The wind energy is used to pulverize in one step, eliminating the traditional screening process.

[0003] According to the size of the crushed or crushed materials, the crusher can be divided into coarse crusher, pulverizer, and ultrafine pulverizer. There are four external forces applied to the solid during the pulverization process: shearing, impact, rolling, and grinding. Shearing is mainly used in coarse crushing (crushing) and pulverization operations, and is suitable for crushing or pulverizing tough or fibrous materials and large blocks; impact is mainly used in pulverization operations, suitable for pulverizing brittle materials; rolling is mainly used in high-fineness pulverization (ultrafine pulverization) operations, suitable for ultrafine pulverization of materials of most properties; grinding is mainly used in ultrafine pulverization or ultra-large pulverization equipment, suitable for further pulverization after pulverization.

[0004] Application number in the prior art: CN202121306626.7 discloses a gel particle crushing device, including a screen and a screw propeller, the screen is provided with meshes, the screen is located at the outlet of the screw propeller, the screw propeller is used to push the gel through the screen to generate a strip gel, the mesh size determines the diameter of the gel particles, and can be determined as needed; the outlet of the screen is provided with a cutter, the blade of the cutter is parallel to the plane of the screen outlet and moves along the plane, and is used to cut the strip gel. The feed hopper of the crushing device is a funnel-shaped necking type feeding between the screw propeller, and its defect is that the material is accumulated in the feed hopper, and it is easy to get stuck. Secondly, it uses gravity to feed, and the feed amount of the material cannot be accurately controlled; in addition, it is only crushed by the screw propeller to crush the material through the screen and the cutter, and its crushing effect is poor. In view of the above, it is necessary to propose a variety of low-temperature crushers to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the above technical problems and provide a variety of low-temperature pulverizers.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multi-low temperature pulverizer, including a quantitative feeding part, a freezing conveying part, a pulverizing part, and a separation part; the quantitative feeding part includes a feeding hopper, the lower end of the feeding hopper is connected to the freezing conveying part through a feeding pipe, and a feeding impeller is rotatably connected to the feeding pipe. The feeding impeller has multiple fins distributed circumferentially, and a quantitative feeding groove is formed between adjacent fins. The quantitative feeding speed is adjusted by controlling the rotation speed of the feeding impeller.

[0007] Furthermore, the freezing conveying part includes a conveying pipe, which is a cylindrical hollow tube. One end of the conveying pipe is connected to the feed port of the crushing part, and the other end is connected to the air source. The middle part of the conveying pipe is connected to the discharge pipe.

[0008] Furthermore, the delivery pipe and / or the charging hopper is connected with a refrigeration pipe, and the refrigeration pipe is connected to a cold source, and the cold source delivers a gaseous or liquid freezing medium to the delivery pipe and / or the charging hopper through the refrigeration pipe.

[0009] Furthermore, the crushing part includes a crushing chamber, a crushing cutter disc, and a driving mechanism; a cylindrical accommodating chamber is formed inside the crushing chamber, the crushing cutter disc is rotatably connected and arranged in the crushing chamber, and the output end of the driving mechanism is connected to the main shaft of the crushing cutter disc to drive the crushing cutter disc to rotate; a feed port is arranged on one side of the plane of the crushing chamber, and a discharge port is arranged on the other side of the plane, and the discharge port is connected to the separation part.

[0010] Furthermore, the crushing cutter disc includes a disc, a primary crushing blade, and a secondary crushing blade; the disc is disc-shaped, a main shaft is fixed at the center of the disc, and the primary crushing blade and the secondary crushing blade are evenly distributed around the edge of the disc.

[0011] Furthermore, the primary crushing blade is arranged on the side of the disc facing the feed port, and the secondary crushing blade is arranged on the side of the disc facing the discharge port, and the number of the secondary crushing blades is greater than the number of the primary crushing blades.

[0012] Furthermore, the primary crushing blade and the secondary crushing blade are both vertically fixed on the surface of the disc, and the primary crushing blade and the secondary crushing blade are both radially arranged, and the diameter of the trajectory circle surrounded by the outer edges of the primary crushing blade and the secondary crushing blade is slightly smaller than the inner diameter of the crushing chamber; and the diameter of the trajectory circle is larger than the disc diameter, so that an axial channel for powder to pass through the disc is formed between two adjacent crushing blades.

[0013] Furthermore, an arc-shaped guide groove is provided on the discharge surface of the crushing chamber, and the guide groove includes a shallow groove end and a deep groove end, the shallow groove end and the deep groove end are connected by an arc-shaped groove, the inner bottom depth of the arc-shaped groove gradually transitions to deepen from the shallow groove end to the deep groove end, and a discharge port passing through the discharge surface is formed at the deep groove end; the width of the arc-shaped groove gradually transitions to widen from the shallow groove end to the deep groove end; the arc radius of the guide groove is smaller than the radius of the accommodating chamber.

[0014] Furthermore, the separation part includes a cyclone separator, the separation inlet pipe of the cyclone separator is connected to the outlet of the crushing part, and the cyclone separator includes a lower shell, an upper cover body, a powder outlet, and a gas phase outlet pipe; the upper cover body is detachably arranged on the lower shell body, a separation inlet pipe is arranged on one side of the lower shell body, a powder outlet is arranged at the bottom of the lower shell body, a gas phase outlet pipe is vertically arranged in the middle of the upper cover body, the lower end of the gas phase outlet pipe vertically extends into the lower shell body, and the lower end of the gas phase outlet pipe is lower than the separation inlet pipe.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model is a multi-low temperature pulverizing unit with the advantages of stable technical performance, low noise, low power consumption, high production efficiency, ultra-low temperature, beautiful appearance and small footprint. Compared with the existing pulverizer, the fineness of the product particle size can be controlled according to the rotation speed of the pulverizing blade, the particle size can be adjusted arbitrarily, and the set freezing conveying part makes the pulverizing temperature rise ultra-low, so it is particularly suitable for the pulverization of heat-sensitive materials such as sugar, plastic powder and Chinese medicinal materials. The unit is an ideal ultra-low temperature pulverizing equipment for industries such as plastics, rubber, pharmaceuticals, food, and chemicals. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the internal structure of a variety of low-temperature pulverizers in the utility model;

[0017] Figure 2 It is a side view structural schematic diagram of a variety of low-temperature pulverizers of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the charging impeller in the utility model;

[0019] Figure 4 A front view of the crushing cutter disc in the utility model;

[0020] Figure 5 A schematic diagram of the structure inside the crushing chamber of the utility model;

[0021] Figure 6 A front view of the discharge surface in the utility model;

[0022] Figure 7 A schematic cross-sectional view of the discharge surface in the utility model;

[0023] Figure 8 A schematic diagram of the structure of the separation part of the utility model;

[0024] In the figure: 1. quantitative unloading part; 2. freezing conveying part; 3. crushing part; 4. separation part; 5. feeding hopper; 6. unloading pipe; 7. feeding impeller; 8. fin; 9. feeding trough; 10. conveying pipe; 11. feeding port; 12. refrigeration pipe; 13. crushing chamber; 14. crushing knife disc; 15. driving mechanism; 16. main shaft; 17. discharge port; 18. disc; 19. primary crushing blade; 20. secondary crushing blade; 21. axial channel; 22. guide groove; 23. shallow groove end; 24. deep groove end; 25. arc groove; 26. separation inlet pipe; 27. lower shell; 28. upper cover; 29. ​​powder outlet; 30. gas phase outlet pipe; 31. discharge surface; 32. servo motor. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] A variety of low temperature pulverizers, such as Figure 1 , 2 As shown, it includes a quantitative feeding part 1, a freezing conveying part 2, a crushing part 3, and a separation part 4; the quantitative feeding part 1 includes a feeding hopper 5, the lower end of the feeding hopper 5 is connected to the freezing conveying part 2 through a feeding pipe 6, and a feeding impeller 7 is rotatably connected to the feeding pipe 6. Figure 1 As shown, the feed pipe 6 is vertically connected to the feeding hopper 5 and the conveying pipe 10 below, and a transverse installation pipe for installing a feeding impeller 7 is vertically penetrated in the middle of the feed pipe 6, and the feeding impeller 7 is arranged in the transverse installation pipe. As shown in the figure, the feeding impeller 7 is in the middle of the feed pipe 6 and completely separates it into upper and lower sides; Figure 3 As shown, the feeding impeller 7 has a plurality of fins 8 distributed circumferentially, and a quantitative feeding trough 9 is formed between adjacent fins 8. In this embodiment, the feeding trough 9 is processed into a V-shape so that the cross-section of the feeding impeller 7 is similar to a gear shape. It can be understood that the shape of the feeding trough 9 is not limited, and a U-shape can also be adopted, but a V-shape is preferred because the V-shaped feeding trough 9 forms a triangular shape when it rotates downward, and the inclined side wall can make it easier for the internal material to fall out cleanly.

[0027] A servo motor 32 is provided at the end of the transverse mounting tube, which can accurately control the rotation speed of the feeding impeller 7 and thus accurately control the feeding amount. When the feeding impeller 7 rotates, a part of the feeding trough 9 faces upward, and the material falls into the feeding trough 9. As the feeding impeller 7 rotates, the feeding trough 9 filled with materials rotates downward, so that the material can fall out of the feeding trough 9, and then the empty feeding trough 9 rotates again to feed, and then the cycle continues. Because the amount of material dropped each time is a fixed value, accurate feeding can be performed by controlling the rotation speed. In addition, it can be understood that the edge of the fin 8 of the feeding impeller 7 is relatively close to the inner wall of the transverse mounting tube, so that the edge of the fin 8 can be used to close the feeding pipe 6, that is, when the feeding impeller 7 does not rotate, the material will not fall into the conveying pipe 10.

[0028] Further, such as Figure 2 As shown, the freezing conveying part 2 includes a conveying pipe 10, which is a cylindrical hollow pipe. One end of the conveying pipe 10 is connected to the feed port 11 of the crushing part 3, and the other end is connected to the gas source. The middle part of the conveying pipe 10 is connected to the feed pipe 6. In actual use, the gas source can be a pressurized gas source or a normal pressure gas source according to the processing needs. When a pressurized gas source is used, as shown in FIG. Figure 2 As shown, there is a flange at the end of the conveying pipe 10, through which a pressure gas source is connected, and the pressure gas source is filled into the pulverizer with pressure gas, which has the following advantages: first, the pressure gas accelerates the speed of the material passing through the conveying pipe 10, and the material in the feed trough 9 can be flushed with gas, which can effectively prevent the material from adhering to the inner wall of the feed trough 9, and can help improve the feeding accuracy; second, since a separation part 4 is provided downstream, and the separation part 4 adopts a cyclone separator, the normal operation of the cyclone separator requires a certain inlet starting speed. If the air speed at the separation inlet pipe 26 is changed, it is not conducive to the rotation and movement of the powder in the cyclone separator and the separation of the gas. It can be understood that when the crushing blade 14 rotates, a certain suction force will be generated to suck the material into the crushing chamber 13, but when the powder is discharged on the other side of the disc 18, there is a lack of sufficient power, resulting in a low air speed entering the cyclone separator. The provision of an air source in this embodiment can well compensate for this defect. In addition, it can be understood that the aforementioned atmospheric pressure air source can be directly connected to the atmosphere, that is, the driving force generated by the crushing blade 14 is used to drive the material.

[0029] Further, the delivery pipe 10 and / or the feeding hopper 5 are connected with a refrigeration pipe 12. It can be understood that the refrigeration pipe 12 can be set in one of the delivery pipe 10 and the feeding hopper 5, or Figure 1As shown, a refrigeration pipe 12 is provided on the conveying pipe 10 and the feeding hopper 5 at the same time, and valves are provided on the pipelines, so that when it is necessary to crush frozen materials, the valve of the refrigeration pipe is opened, and when it is necessary to crush low-temperature materials, the valve of the low-temperature pipeline is opened. When low-temperature crushing is required, one or two valves are opened to perform low-temperature crushing, and when it is necessary to crush normal temperature materials, both valves are closed. The refrigeration pipe 12 is connected to a cold source, and the cold source conveys a gaseous or liquid freezing medium to the conveying pipe 10 and / or the feeding hopper 5 through the refrigeration pipe 12. Specifically, during operation, it can be understood that the freezing medium can be treated by low-temperature freezing of liquid nitrogen or cold air, for example, liquid nitrogen is sent into the conveying pipe 10 through the refrigeration pipe 12, and the liquid nitrogen freezes the material instantly, and the brittleness of the material is increased, and then it is rotated into the low-temperature crushing chamber 13, and under the action of the high-speed crushing cutter 14, the material is impacted and rubbed in the crushing chamber 13, thereby being crushed.

[0030] Further, such as Figure 5 As shown, the crushing part 3 includes a crushing chamber 13, a crushing blade disc 14, and a driving mechanism 15; a cylindrical accommodating chamber is formed inside the crushing chamber 13, and the crushing blade disc 14 is rotatably connected and arranged in the crushing chamber 13, and the output end of the driving mechanism 15 is connected to the main shaft 16 of the crushing blade disc 14 to drive the crushing blade disc 14 to rotate; a feed port 11 is arranged on one side of the plane of the crushing chamber 13, and a discharge port 17 is arranged on the other side of the plane, and the discharge port 17 is connected to the separation part 4. The driving mechanism 15 drives the crushing blade disc 14 to rotate at a high speed, so that a negative pressure is generated at the center of the crushing blade disc 14, and the material can be sucked into the crushing chamber 13 for crushing. Specifically, as Figure 4 As shown, the pulverizing blade disc 14 includes a disc 18, a primary pulverizing blade 19, and a secondary pulverizing blade 20; the disc 18 is disc-shaped, and a main shaft 16 is fixed at the center of the disc 18. The primary pulverizing blade 19 and the secondary pulverizing blade 20 are evenly distributed around the edge of the disc 18. Figure 4 As shown, the primary crushing blade 19 and the secondary crushing blade 20 are both vertically fixed on the surface of the disc 18, and the primary crushing blade 19 and the secondary crushing blade 20 are both arranged radially. The inhaled material is thrown to the edge of the crushing cutter disc 14 under the centrifugal force of high-speed rotation. Since the diameter of the trajectory circle surrounded by the outer edges of the primary crushing blade 19 and the secondary crushing blade 20 is slightly smaller than the inner diameter of the crushing chamber 13, the material enters between the edges of the primary crushing blade 19 and the secondary crushing blade 20 and the inner wall of the crushing chamber 13, thereby realizing the crushing effect of the crushing blade on the material.

[0031] Furthermore, the primary crushing blade 19 is arranged on the side of the disc 18 facing the feed port 11, and the secondary crushing blade 20 is arranged on the side of the disc 18 facing the discharge port 17, and the number of the secondary crushing blades 20 is greater than the number of the primary crushing blades 19. Figure 4 As shown, eight primary crushing blades 19 are evenly distributed on one side of the feed surface, and 24 secondary crushing blades 20 are evenly distributed on one side of the discharge surface 31. It can be understood that the material particles on the side of the feed surface are larger, so fewer primary crushing blades 19 are designed to accommodate large particles of material entering between the primary crushing blades 19; and after the material is crushed and becomes smaller, it can pass through the axial channel 21 and enter the side of the discharge surface 31. This side is provided with relatively dense secondary crushing blades 20, which can perform more collision and crushing operations on the material to make the material particle size smaller.

[0032] Furthermore, the diameter of the trajectory circle is larger than the diameter of the disk 18, such as Figure 4 As shown, the material is first crushed on the feeding surface side under the negative pressure suction generated by the rotation of the crushing blade 14. As the material enters, the later-entering material pushes the earlier-entering material to the inner wall of the crushing chamber 13, and can pass over the edge of the blade to enter the discharge surface 31 side to be crushed by the secondary crushing blade 20. Figure 5 The material movement trajectory shown by the dotted arrow in the middle forms an axial channel 21 for the powder to pass through the disc 18 between two adjacent crushing blades.

[0033] Furthermore, an arc-shaped guide groove 22 is provided on the discharge surface 31 of the pulverizing chamber 13, and the guide groove 22 includes a shallow groove end 23 and a deep groove end 24, and the shallow groove end 23 and the deep groove end 24 are connected by an arc-shaped groove 25, and the inner bottom depth of the arc-shaped groove 25 gradually transitions to deepen from the shallow groove end 23 to the deep groove end 24, and a discharge port 17 penetrating the discharge surface 31 is formed at the deep groove end 24; the width of the arc-shaped groove 25 gradually transitions to widen from the shallow groove end 23 to the deep groove end 24; the arc radius of the guide groove 22 is smaller than the radius of the accommodating chamber. Figure 6 , 7 As shown, the position of the discharge port 17 is not located at the edge of the crushing chamber 13, but at a certain distance from the edge. Its function is that due to the different particle sizes of the crushed materials, under the action of centrifugal force, the centrifugal force on the material with larger particle size is greater than that on the material with smaller particle size, so that the materials of different particle sizes form a distribution with the particle size gradually increasing from the center to the edge. Therefore, the discharge port 17 set on the inner side can send out the particles with smaller particle size that meet the requirements, while the particles with larger particle size continue to be circulated and crushed. An arc groove 25 with a circular arc inner bottom and a sloped surface is provided to facilitate the powder to flow out from the discharge port 17. It can be understood that the setting direction of the arc groove 25 matches the rotation direction of the crushing blade 14, that is, the direction from the shallow groove end 23 to the deep groove end 24 is the same as the direction of the crushing blade 14, so the material can be as Figure 7The dotted line in the middle indicates the direction of the material flowing into the discharge port 17. It can be understood that as the material moves, the material will collide with the inner wall of the discharge port 17 with a larger head-on collision, thereby increasing the probability of the material flowing out of the discharge port 17, thereby increasing the discharge amount, improving the smoothness of the discharge, and avoiding the material from being blocked in the crushing chamber 13.

[0034] Furthermore, the separation part 4 includes a cyclone separator, and the separation inlet pipe 26 of the cyclone separator is connected to the outlet of the crushing part 3, such as Figure 1 , 8 As shown, the cyclone separator includes a lower shell 27, an upper cover 28, a powder outlet 29, and a gas phase outlet pipe 30; the upper cover 28 is detachably arranged on the lower shell 27, a separation inlet pipe 26 is arranged on one side of the lower shell 27, a powder outlet 29 is arranged at the bottom of the lower shell 27, and a gas phase outlet pipe 30 is vertically arranged in the middle of the upper cover 28, and the lower end of the gas phase outlet pipe 30 vertically extends into the lower shell 27, and the lower end of the gas phase outlet pipe 30 is lower than the separation inlet pipe 26. The separation part 4 adopts a cyclone separator in the prior art, the difference is that in this embodiment, the upper cover 28 is installed in a quick-release manner, so it is easy to clean the interior.

[0035] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A variety of low temperature pulverizers, characterized in that, The invention comprises a quantitative feeding section (1), a freezing conveying section (2), a crushing section (3), and a separation section (4); the quantitative feeding section (1) comprises a feeding hopper (5), the lower end of which is connected to the freezing conveying section (2) via a feeding pipe (6), a feeding impeller (7) is rotatably connected to the feeding pipe (6), a plurality of fins (8) are circumferentially distributed on the feeding impeller (7), and a quantitative feeding trough (9) is formed between adjacent fins (8), and the quantitative feeding speed is adjusted by controlling the rotation speed of the feeding impeller (7).

2. The cryogenic pulverizer according to claim 1, characterized in that: The freezing conveying section (2) includes a conveying pipe (10), which is a cylindrical hollow tube. One end of the conveying pipe (10) is connected to the feed port (11) of the crushing section (3), and the other end is connected to the air source. The middle part of the conveying pipe (10) is connected to the discharge pipe (6).

3. A variety of low temperature pulverizers according to claim 2, characterized in that: The conveying pipe (10) and / or the charging hopper (5) are connected to a refrigeration pipe (12), and the refrigeration pipe (12) is connected to a cold source, and the cold source conveys a gaseous or liquid freezing medium to the conveying pipe (10) and / or the charging hopper (5) through the refrigeration pipe (12).

4. The cryogenic pulverizer according to claim 1, characterized in that: The pulverizing section (3) comprises a pulverizing chamber (13), a pulverizing blade disc (14), and a driving mechanism (15); a cylindrical accommodating chamber is formed inside the pulverizing chamber (13); the pulverizing blade disc (14) is rotatably connected and arranged in the pulverizing chamber (13); an output end of the driving mechanism (15) is connected to a main shaft (16) of the pulverizing blade disc (14) to drive the pulverizing blade disc (14) to rotate; a feed port (11) is arranged on one side of a plane of the pulverizing chamber (13), and a discharge port (17) is arranged on the other side of a plane; the discharge port (17) is connected to the separation section (4).

5. A variety of low temperature pulverizers according to claim 4, characterized in that: The pulverizing blade disc (14) comprises a disc (18), a primary pulverizing blade (19), and a secondary pulverizing blade (20); the disc (18) is disc-shaped, a main shaft (16) is fixedly arranged at the center of the disc (18), and the primary pulverizing blade (19) and the secondary pulverizing blade (20) are evenly distributed around the edge of the disc (18).

6. A variety of low temperature pulverizers according to claim 5, characterized in that: The primary crushing blade (19) is arranged on the side of the disc (18) facing the feed port (11), and the secondary crushing blade (20) is arranged on the side of the disc (18) facing the discharge port (17), and the number of the secondary crushing blades (20) is greater than the number of the primary crushing blades (19).

7. The cryogenic pulverizer according to claim 5, characterized in that: The primary pulverizing blade (19) and the secondary pulverizing blade (20) are both vertically fixed on the surface of the disc (18), and the primary pulverizing blade (19) and the secondary pulverizing blade (20) are both radially arranged, and the diameter of the track circle formed by the outer edges of the primary pulverizing blade (19) and the secondary pulverizing blade (20) is slightly smaller than the inner diameter of the pulverizing chamber (13); and the diameter of the track circle is larger than the diameter of the disc (18), so that an axial channel (21) for powder to pass through the disc (18) is formed between two adjacent pulverizing blades.

8. The cryogenic pulverizer according to claim 4, characterized in that: An arc-shaped guide groove (22) is provided on the discharge surface (31) of the pulverizing chamber (13), the guide groove (22) comprising a shallow groove end (23) and a deep groove end (24), the shallow groove end (23) and the deep groove end (24) being connected via an arc-shaped groove (25), the inner bottom depth of the arc-shaped groove (25) gradually transitions to deepen from the shallow groove end (23) to the deep groove end (24), and a discharge port (17) penetrating the discharge surface (31) is formed at the deep groove end (24); the width of the arc-shaped groove (25) gradually transitions to widen from the shallow groove end (23) to the deep groove end (24); and the radius of the circular arc where the guide groove (22) is located is smaller than the radius of the accommodating chamber.

9. The cryogenic pulverizer according to claim 1, characterized in that: The separation section (4) comprises a cyclone separator, the separation inlet pipe (26) of the cyclone separator is connected to the outlet of the crushing section (3), and the cyclone separator comprises a lower shell (27), an upper cover (28), a powder outlet (29), and a gas phase outlet pipe (30); the upper cover (28) is detachably arranged on the lower shell (27), a separation inlet pipe (26) is arranged on one side of the lower shell (27), a powder outlet (29) is arranged at the bottom of the lower shell (27), and a gas phase outlet pipe (30) is vertically arranged in the middle of the upper cover (28), the lower end of the gas phase outlet pipe (30) vertically extends into the lower shell (27), and the lower end of the gas phase outlet pipe (30) is lower than the separation inlet pipe (26).

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