Material circulation low-temperature pulverizer system

Abstract

The invention relates to the technical field of material crushing, and provides a material circulation low-temperature crusher system. The system mainly comprises a feeding bin, a crushing main machine, a cyclone material collector and a vibrating screen, wherein a discharging port is formed in the bottom end of the feeding bin and communicates with the feeding end of the first spiral conveyor, the discharging end of the first spiral conveyor is connected with the top end of the freezing pipe, the side wall of the freezing pipe communicates with the liquid nitrogen pipeline, the bottom end of the freezing pipe communicates with the feeding end of the smashing main machine, and the discharging end of the smashing main machine is connected with the feeding end of the draught fan; the discharging end of the fan is connected with the feeding end of the cyclone collector; the discharging end of the cyclone collector is communicated with the vibrating screen, the side wall of the vibrating screen is communicated with the feeding end of the spiral conveyor, and the discharging end of the spiral conveyor is communicated with the feeding bin. Liquid nitrogen is injected to conduct low-temperature embrittlement treatment on materials, so that the materials can be fully smashed, meanwhile, large-particle materials which are not fully smashed are screened out through the vibrating screen to enter the circulation again, and the material smashing effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of material crushing technology, and more specifically to a material circulation cryogenic crushing system. Background Technology

[0002] Cryogenic pulverizers are widely used in the pharmaceutical, food, chemical, and national defense research industries for pulverizing materials, especially heat-sensitive substances, rubber, plastics, Chinese and Western medicines, animal and plant materials, and materials that are tough and cannot be pulverized at room temperature. These devices freeze the materials to be pulverized below their embrittlement point before pulverizing them.

[0003] However, existing cryogenic pulverizers can only pulverize materials once, and cannot pulverize materials with larger particle sizes again, so the pulverization effect cannot be guaranteed, thus affecting the quality of the output material. Furthermore, existing cryogenic pulverizers cannot intervene in or control the output amount and conveying speed of the material.

[0004] Therefore, the present invention proposes a material circulation cryogenic pulverizer system. Summary of the Invention

[0005] The purpose of this invention is to provide a material circulation low-temperature pulverizer system that can circulate and pulverize materials with large particle sizes, so that the materials ultimately achieve a better pulverization effect.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A material circulation cryogenic pulverizer system includes a feed hopper, a freezing pipe, a pulverizer host, a blower, a cyclone collector, a vibrating screen, a first screw conveyor, and a second screw conveyor; The bottom of the feeding hopper is provided with a discharge port, which is connected to the feeding end of the first screw conveyor; The discharge end of the first screw conveyor is connected to the top end of the freezing pipe, the side wall of the freezing pipe is connected to the liquid nitrogen pipeline, and the bottom end of the freezing pipe is connected to the feed end of the crushing host. The discharge end of the crushing host is connected to the feed end of the blower, and the discharge end of the blower is connected to the feed end of the cyclone collector; The discharge end of the cyclone collector is connected to the vibrating screen, and the side wall of the vibrating screen is connected to the feed end of the second screw conveyor. The discharge end of the second screw conveyor is connected to the side wall of the feed hopper.

[0007] Preferably, the pulverizing host includes a main unit housing, a first drive motor, a drive wheel, a conveyor belt, a driven wheel, and a pulverizing disc; The output shaft of the first drive motor is fixedly connected to the middle position of the drive wheel, the drive wheel is connected to the driven wheel via a conveyor belt, and the driven wheel is connected to the middle position of the crushing disc via a rotating shaft; The inner wall of the main unit is provided with an internal gear ring, and the pulverizing disc is located inside the main unit; The main unit is also equipped with an air volume regulating plate, which is located between the crushing disc and the discharge end of the main unit, and the air volume regulating plate and the crushing disc are arranged in parallel and opposite to each other.

[0008] Preferably, the internal gear ring is formed by splicing an upper gear ring and a lower gear ring, wherein a pressure block is provided at the splice of the upper gear ring and the lower gear ring, and the pressure block is connected to the main unit chassis by bolts.

[0009] Preferably, the outer contour of the pressure block is frustum-shaped, and the ends of the upper and lower gear rings are in contact with the pressure block.

[0010] Preferably, a plurality of blades are provided around the perimeter of the pulverizing disc, and the blades are arranged at equal intervals.

[0011] Preferably, the blades are welded to the crushing disc using an insert method.

[0012] Preferably, the side wall of the freezing tube is connected to an exhaust pipe.

[0013] Preferably, a third screw conveyor is also provided, wherein the discharge end of the second screw conveyor is connected to the feed end of the third screw conveyor, and the discharge end of the third screw conveyor is connected to the feed hopper.

[0014] Preferably, the first screw conveyor, the second screw conveyor, and the third screw conveyor all have the same structure, including a feed pipe, an auger, a second drive motor, and a reducer; The auger is rotatably mounted inside the feed pipe, and the second drive motor is mounted at the end of the feed pipe. The output shaft of the second drive motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the end of the auger.

[0015] Preferably, a temperature detection sensor is installed at the discharge port of the crushing host.

[0016] The beneficial technical effects of this invention are: This invention proposes a material circulation cryogenic pulverizer system. This invention proposes a material circulation cryogenic pulverizer system. The system injects liquid nitrogen into a freezing pipe via a liquid nitrogen pipeline, freezing the material to be pulverized below its embrittlement point before subsequent pulverization. This improves pulverization efficiency while ensuring good pulverization results. Material entering the pulverizer impacts, collides, and is sheared against the pulverizing disc and internal gear ring, achieving thorough pulverization. It is then drawn into a cyclone collector and vibrating screen by the negative pressure of a fan. Simultaneously, an airflow regulating plate is installed inside the pulverizer's main unit to control and regulate the material output. The system uses a vibrating screen to screen out large, insufficiently pulverized particles, which are then conveyed back into the feed hopper via a screw conveyor and re-enter the pulverizer for further pulverization, ensuring thorough pulverization and guaranteeing the quality of the output material. The system incorporates multiple frequency-controlled screw conveyors to control the material conveying speed, thereby achieving thorough pulverization and indirectly ensuring the quality of the pulverized material. Attached Figure Description

[0017] Figure 1 This is a perspective view of an embodiment of the present invention; Figure 2 This is a front view in an embodiment of the present invention; Figure 3 This is a side view from an embodiment of the present invention; Figure 4 This is a top view in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the pulverizing host in an embodiment of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the structure of the pulverizing host in an embodiment of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the screw conveyor in an embodiment of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the screw conveyor in an embodiment of the present invention. Figure 2 ; Among them, 1-feed hopper; 21-First screw conveyor, 22-Second screw conveyor, 23-Third screw conveyor; 240-Feeding pipe, 241-Second drive motor, 242-Reducer, 243-Auger; 3-Freezing pipe, 31-Liquid nitrogen pipeline, 32-Exhaust pipe; 4-Grinding host, 40-Main unit housing, 41-First drive motor, 42-Driving wheel, 43-Conveyor belt, 44-Driven wheel, 441-Rotating shaft; 45-Grinding disc, 451-Blade; 46-Internal gear ring, 461-Upper gear ring, 462-Lower gear ring; 463-Pressed block; 47-Airflow regulating plate; 5- Fan; 6-Cyclone collector; 7-Vibrating screen. Detailed Implementation

[0018] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. Certain embodiments of the invention will be described more fully below with reference to the accompanying drawings, and some, but not all, of these embodiments will be shown. In fact, various embodiments of the invention can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to enable the invention to meet applicable legal requirements.

[0019] In the description of this invention, it should be noted that the terms "inner," "outer," "upper," "lower," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] refer to Figures 1 to 8 As shown in the figure, this embodiment of the invention provides a material recycling cryogenic pulverizer system. This system mainly includes a feed hopper 1, a first screw conveyor 21, a second screw conveyor 22, a freezing pipe 3, a pulverizer main unit 4, a blower 5, a cyclone collector 6, and a vibrating screen 7. This material recycling cryogenic pulverizer system can perform cryogenic pulverization of materials, improving pulverization efficiency. Simultaneously, it can screen out materials that do not meet the set particle size for recycling and pulverization, improving pulverization quality and ensuring the pulverization effect.

[0021] Combination Figure 1 As shown, the lower outer contour of the feed bin 1 has an inverted frustum-shaped structure, which allows the material to converge during the falling process, effectively improving the feeding efficiency. The bottom end of the feed bin 1 has a discharge port, which is connected to the feed end of the first screw conveyor 21.

[0022] Combination Figure 1 and Figure 2As shown, the discharge end of the first screw conveyor 21 is connected to the top of the freezing pipe 3. The side wall of the freezing pipe 3 is connected to the liquid nitrogen pipeline 31. Liquid nitrogen is supplied to the freezing pipe 3 through the liquid nitrogen pipeline 31, which can perform low-temperature treatment on the material in the freezing pipe 3, freezing the material to be crushed below its embrittlement point before subsequent crushing. This improves crushing efficiency while ensuring that the material achieves a better crushing effect. Low-temperature crushing can crush materials that are difficult to crush at room temperature, producing products with better particle flowability and more uniform particle size dispersion than those crushed at room temperature. Furthermore, the deterioration caused by heat and oxidation during the crushing process does not occur during room temperature crushing, and there is no risk of overflow or dust explosion during crushing, ensuring the safety of the crushing process.

[0023] Combination Figure 2 As shown, the side wall of the freezing tube 3 is connected to an exhaust pipe 32. The gas generated after the liquid nitrogen is vaporized can be discharged through the exhaust pipe 32 to prevent explosion due to gas accumulation, and also to protect the life and health safety of the staff.

[0024] Combination Figure 1 and Figure 2 As shown, the bottom end of the freezing pipe 3 is connected to the feed end of the crushing host 4. The crushing host 4, as the main structural component of the material circulation cryogenic crusher system, affects the crushing effect and quality. The crushing host 4 mainly includes a main unit housing 40, a first drive motor 41, a drive wheel 42, a conveyor belt 43, a driven wheel 44, and a crushing disc 45. The output shaft of the first drive motor 41 is fixedly connected to the middle position of the drive wheel 42. The drive wheel 42 is connected to the driven wheel 44 via the conveyor belt 43. The driven wheel 44 is connected to the middle position of the crushing disc 45 via a rotating shaft. The first drive motor 41 provides power to drive the crushing disc 45 to rotate, thereby crushing the material.

[0025] Combination Figure 5 and Figure 6 As shown, the pulverizing disc 45 is located inside the main unit housing 40. Several blades 451 are arranged around the perimeter of the pulverizing disc 45 at equal intervals. The blades 451 are welded to the pulverizing disc 45 using an insert-type welding method, which makes the connection more stable and ensures the smooth operation of the pulverizing process.

[0026] Combination Figure 5 and Figure 6As shown, the inner wall of the main unit chassis 40 is provided with an internal gear ring 46, which is formed by splicing an upper gear ring 461 and a lower gear ring 462. The upper gear ring 461 is located above the lower gear ring 462, and the outlines of both the upper gear ring 461 and the lower gear ring 462 are semi-circular arcs. A pressure block 463 is provided at the splice of the upper gear ring 461 and the lower gear ring 462, and the pressure block 463 is connected to the main unit chassis 40 by bolts. The outer outline of the pressure block 463 is frustoconical, and the ends of the upper gear ring 461 and the lower gear ring 462 are in contact with the pressure block 463. The pressure block 463 can be used to fix the upper gear ring 461 and the lower gear ring 462. When the inner gear ring 46 is installed, the structural characteristics of the pressure block 463 can be used to press the upper gear ring 461 and the lower gear ring 462 together, making the inner gear ring 46 more tightly and firmly connected to the inner wall of the main unit box 40. When the material is crushed, it is not easy to fall off, ensuring the normal crushing of the material.

[0027] The first drive motor drives the crushing disc 45 to rotate, and with the cooperation of the internal gear ring 46, the material can be crushed by collision. At the same time, the material can achieve a relatively ideal crushing effect through repeated impacts, collisions, shearing and friction between the material and the crushing disc 45, the material and the internal gear ring 46, and the material itself.

[0028] Combination Figure 5 and Figure 6 As shown, an airflow regulating plate 47 is also provided inside the main unit housing 40. The airflow regulating plate 47 is located between the crushing disc 45 and the discharge end of the main unit housing 40, and is parallel to and opposite to the crushing disc 45. The radius of the airflow regulating plate 47 is smaller than the radius of the circular area enclosed by the internal gear ring 46, allowing the material to reach the discharge port of the main unit housing through the gap between the airflow regulating plate 47 and the internal gear ring 46. The distance between the airflow regulating plate 47 and the discharge end of the main unit housing 40 is adjusted using bolts and nuts to control the airflow, which in turn affects the amount of material discharged. When the fan speed 5 is constant, the airflow decreases when the airflow regulating plate 47 is close to the discharge port of the main unit housing 40, resulting in less material discharged. Conversely, the airflow increases when the airflow regulating plate 47 is far from the discharge port of the main unit housing 40, resulting in more material discharged. By adding the airflow regulating plate 47, the amount of material discharged can be controlled and regulated.

[0029] Combination Figure 4As shown, a temperature sensor is installed at the discharge end of the crushing host 4 to detect the temperature of the material and observe whether the material temperature has reached the embrittlement temperature. The discharge end of the main unit box 40 of the crushing host 4 is connected to the feed end of the blower 5. The blower 5 can provide a negative pressure environment for the system. The material that has been fully crushed by the crushing host 4 is transported to the next stage equipment by the negative pressure attraction provided by the blower 5. The discharge end of the blower 5 is connected to the feed end of the cyclone collector 6. Small molecules such as dust are discharged through the top air outlet of the cyclone collector 6, while larger particles are collected at the bottom discharge end.

[0030] Combination Figure 2 As shown, the discharge end of the cyclone collector 6 is connected to the vibrating screen 7. The vibrating screen 7 can vibrate and screen the material. The material that meets the preset particle size will fall through the screen of the vibrating screen 7 and be finally recycled as the finished product. The large particles that do not meet the preset particle size will be intercepted and collected in the upper layer by vibration and enter the second screw conveyor 22 for subsequent recycling and crushing, so that the material finally meets the preset particle size and ensures the quality of the material output.

[0031] Combination Figure 3 As shown, the side wall of the vibrating screen 7 is connected to the feed end of the second screw conveyor 22. The discharge end of the second screw conveyor 22 is connected to the feed end of the third screw conveyor 23, and the discharge end of the third screw conveyor 23 is connected to the feed hopper 1. Ultimately, materials with larger particle sizes can be fed back into the feed hopper 1 for further low-temperature crushing.

[0032] Combination Figure 7 and Figure 8 As shown, it should be noted that the first screw conveyor 21, the second screw conveyor 22, and the third screw conveyor 23 all have the same structure, mainly including a feed pipe 240, a second drive motor 241, a reducer 242, and an auger 243. The auger 243 is rotatably mounted inside the feed pipe 240. The second drive motor 241 is located at the end of the feed pipe 240, and its output shaft is connected to the input shaft of the reducer 242. The output shaft of the reducer 242 is connected to the end of the auger 243. The second drive motor 241 drives the auger 243 inside the feed pipe 240 to rotate, thereby conveying materials. This invention uses multiple screw conveyors for material conveying. All screw conveyors are frequency-controlled, allowing for speed adjustment. The second drive motor 241 adjusts the rotational speed of the auger 243 to control the feed rate, thereby achieving thorough material crushing and indirectly ensuring the quality of material crushing.

[0033] The operation process of this invention is as follows: First, the blower 5 is turned on to create a negative pressure environment in the main unit 40. The first drive motor 41 drives the crushing disc 45 to rotate. The material enters the feed hopper 1 and is stored. The first screw conveyor 21 starts working and conveys the material quantitatively to the freezing pipe 3 through the auger 243. Liquid nitrogen is injected into the freezing pipe 3 through the liquid nitrogen pipeline 31 to perform low-temperature embrittlement treatment on the material. The material enters the crushing host 4 to be crushed. After crushing, the material is attracted by the negative pressure and sent to the cyclone collector 6. The bottom end of the cyclone collector 6 is connected to the vibrating screen 7. Qualified material passes through the screen and is finally recycled as finished product. Material with larger particle size is intercepted and collected in the upper layer by vibration. It then enters the second screw conveyor 22 and is then transported to the third screw conveyor 23. Finally, it enters the feed hopper 1 again, thus realizing the low-temperature crushing and recycling of the material.

[0034] Combination Figures 1 to 8 As shown, this invention proposes a material circulation cryogenic pulverizer system. This system injects liquid nitrogen into the freezing pipe 3 via a liquid nitrogen pipeline 31, freezing the material to be pulverized below its embrittlement point before subsequent pulverization. This improves pulverization efficiency while ensuring good pulverization results. The material entering the pulverizer 4 impacts, collides, and is sheared against the pulverizing disc 45 and the internal gear ring 46, achieving thorough pulverization. It is then drawn into the cyclone collector 6 and vibrating screen 7 by the negative pressure of the fan 5. Simultaneously, an airflow regulating plate 47 is installed inside the main unit box 40 of the pulverizer 4 to control and regulate the material output. The vibrating screen 7 filters out large particles that are not fully pulverized, which are then conveyed back into the feed hopper 1 via a screw conveyor and re-enter the pulverizer 4 for further pulverization, ensuring thorough pulverization and guaranteeing the quality of the output material. The system incorporates multiple frequency-controlled screw conveyors to control the material conveying speed, thereby achieving thorough pulverization and indirectly ensuring the quality of the pulverized material.

[0035] Of course, the specific embodiments described above further illustrate the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A material circulation cryogenic pulverizer system, characterized in that: It includes a feed hopper, freezing pipe, crushing host, blower, cyclone collector, vibrating screen, first screw conveyor and second screw conveyor; The bottom of the feeding hopper is provided with a discharge port, which is connected to the feeding end of the first screw conveyor; The discharge end of the first screw conveyor is connected to the top end of the freezing pipe, the side wall of the freezing pipe is connected to the liquid nitrogen pipeline, and the bottom end of the freezing pipe is connected to the feed end of the crushing host. The discharge end of the crushing host is connected to the feed end of the blower, and the discharge end of the blower is connected to the feed end of the cyclone collector; The discharge end of the cyclone collector is connected to the vibrating screen, and the side wall of the vibrating screen is connected to the feed end of the second screw conveyor. The discharge end of the second screw conveyor is connected to the side wall of the feed hopper.

2. The material circulation cryogenic pulverizer system according to claim 1, characterized in that: The pulverizing host includes a main unit housing, a first drive motor, a drive wheel, a conveyor belt, a driven wheel, and a pulverizing disc; The output shaft of the first drive motor is fixedly connected to the middle position of the drive wheel, the drive wheel is connected to the driven wheel via a conveyor belt, and the driven wheel is connected to the middle position of the crushing disc via a rotating shaft; The inner wall of the main unit is provided with an internal gear ring, and the pulverizing disc is located inside the main unit; The main unit is also equipped with an air volume regulating plate, which is located between the crushing disc and the discharge end of the main unit, and the air volume regulating plate and the crushing disc are arranged in parallel and opposite to each other.

3. The material circulation cryogenic pulverizer system according to claim 2, characterized in that: The internal gear ring is formed by splicing an upper gear ring and a lower gear ring. A pressure block is provided at the splice point of the upper gear ring and the lower gear ring, and the pressure block is connected to the main unit chassis by bolts.

4. The material circulation cryogenic pulverizer system according to claim 3, characterized in that: The outer contour of the pressure block is frustum-shaped, and the ends of the upper and lower gear rings are in contact with the pressure block.

5. The material circulation cryogenic pulverizer system according to claim 2, characterized in that: Several blades are arranged around the perimeter of the pulverizing disc, with the blades spaced at equal intervals.

6. The material circulation cryogenic pulverizer system according to claim 5, characterized in that: The blades are welded to the crushing disc using an insert method.

7. The material circulation cryogenic pulverizer system according to claim 1, characterized in that: An exhaust pipe is connected to the side wall of the freezing tube.

8. The material circulation cryogenic pulverizer system according to claim 1, characterized in that: A third screw conveyor is also provided, with the discharge end of the second screw conveyor connected to the feed end of the third screw conveyor, and the discharge end of the third screw conveyor connected to the feed hopper.

9. The material circulation cryogenic pulverizer system according to claim 8, characterized in that: The first screw conveyor, the second screw conveyor, and the third screw conveyor all have the same structure, including a feed pipe, an auger, a second drive motor, and a reducer; The auger is rotatably mounted inside the feed pipe, and the second drive motor is mounted at the end of the feed pipe. The output shaft of the second drive motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the end of the auger.

10. A material circulation cryogenic pulverizer system according to claim 1, characterized in that, The discharge end of the pulverizing host is equipped with a temperature detection sensor.

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