A new type of cryogenic pulverizer

Abstract

This utility model discloses a novel cryogenic pulverizer, comprising a frame with braked pulleys, support mechanisms at the four corners of the frame that can be flipped and supported on the ground, a feeding assembly, a pulverizing module, and a dust removal and separation module at the top, and a powder collection hopper and a powder storage hopper inside. The powder storage hopper is equipped with a weighing sensor that monitors the powder weight in real time. This utility model, through the combination of pulleys and a foldable support mechanism, achieves rigid support for flexible movement and rapid deployment of the equipment, solving the problem of easy displacement and overturning of traditional equipment under vibration conditions. The linkage locking structure ensures the compactness of the support mechanism in the folded state and its stability after deployment. The elastic suspension powder storage hopper and the vibration isolation mechanism of dynamic weighing significantly improve the accuracy of weighing data. Through the synergistic innovation of the support system, weighing management unit, and powder processing module, the operational reliability and environmental adaptability of the equipment under complex working conditions are comprehensively improved.

Description

Technical Field

[0001] This utility model relates to the field of material crushing equipment, and in particular to a novel cryogenic crusher. Background Technology

[0002] Currently, equipment used for material crushing and pulverizing generally suffers from numerous shortcomings in actual production practice. Firstly, regarding equipment mobility, traditional large-scale pulverizing devices are limited by their integrated structural design, requiring hoisting equipment for adjustments to the workstation. While small and medium-sized material pulverizing equipment is equipped with casters, high-frequency vibrations during operation or external disturbances can easily lead to machine displacement or overturning, affecting processing stability and posing safety hazards. Consequently, it fails to meet the demands of modern production for high efficiency and reliability.

[0003] In the pre-cooling stage before material crushing, the cooling and feeding system interfaces of existing small-scale material crushing equipment generally lack effective sealing. The refrigerant used for pre-cooling (such as liquid nitrogen or dry ice) escapes in large quantities around the open feed inlet, causing energy waste, increased production costs, and the formation of condensed mist in the surrounding environment, leading to frost and blockages. The unsealed feed path makes it difficult to control the operating temperature, preventing the crushing efficiency and equipment performance from being fully utilized. During long-term operation, unstable cooling can also easily lead to refrigerant backflow or contaminant backflow, affecting product quality and on-site safety.

[0004] Furthermore, existing small-scale material crushing equipment typically uses rigid container structures for its powder collectors, which only serve a collection function and lack online weighing capabilities. Because real-time powder production information cannot be obtained, operators are forced to intermittently stop the machine for manual weighing calibration, disrupting the production process, leading to untimely production monitoring, and reducing the efficiency of continuous operation.

[0005] Furthermore, after the powder is pulverized at low temperature, it enters the powder collector. Due to changes in the temperature environment, the powder discharge system encounters fluctuations in material humidity. The powder is prone to clumping, becoming damp, or adhering to the pipe wall in the discharge channel, causing blockages or poor conveying. This requires manual cleaning, affecting the continuity of production. Once the properties of the material change, it is difficult to adjust the discharge speed and amount in time, thus affecting the overall throughput and efficiency of the equipment.

[0006] In summary, existing small-scale cryogenic pulverizing equipment has significant shortcomings in terms of support stability, cooling and sealing, real-time weighing, and powder discharge efficiency. Therefore, it is necessary to improve and optimize these technical issues. Utility Model Content

[0007] The purpose of this invention is to provide a new type of cryogenic pulverizer with a more stable support structure, efficient sealing during the conveying process, and real-time weighing and efficient powder discharge functions.

[0008] To achieve the above objectives, this utility model adopts the following solution: A novel cryogenic pulverizer includes a frame with braked pulleys at the bottom, and a rotatable support mechanism at each of the four corners of the frame; a pulverizing module fixed to the center of the top of the frame, the pulverizing module including a cryogenic cooling chamber that can be connected to an external cooling source, a pulverizing rotor rotatably disposed in the cryogenic cooling chamber, and a first drive motor for driving the pulverizing rotor to rotate and crush materials; a feeding assembly and a dust removal and separation module are installed on the top of the frame, the feeding assembly including a main hopper and a conveying mechanism for conveying materials to the cryogenic cooling chamber for cryogenic embrittlement and then pulverizing; the dust removal and separation module including a negative pressure fan and a separation device for separating the pulverized dust from the gas; a powder collection hopper is provided in the middle of the frame below the pulverizing module, the powder collection hopper is connected to the cryogenic cooling chamber and the separation device, and is used to collect the separated powder; a powder storage hopper is connected to the bottom opening of the powder collection hopper via a telescopic connecting pipe, the powder storage hopper is elastically mounted on the frame via an elastic suspension mechanism, the powder storage hopper is provided on both sides for real-time monitoring of powder weight, and the powder storage hopper is provided at the bottom of the powder storage hopper.

[0009] The above-mentioned solution significantly improves the overall performance of the equipment in actual use through optimized structural design. Its combined design of pulleys and support mechanisms allows the equipment to balance rapid movement and stable support, effectively suppressing operational vibration after positioning. By integrating the dust removal and separation module with the suspended powder storage hopper, coordinated operation of crushing, separation, and metering is achieved, effectively reducing material loss during transfer and enhancing the system's automation and continuous operation capabilities. The weighing sensor enables real-time detection of the weight of the crushed powder.

[0010] As a further embodiment of this utility model, the support mechanism includes fixed frames respectively disposed at both ends of the frame. Each fixed frame has two vertical columns hinged to support legs that can be flipped over and supported on the bottom surface in a V-shape. The ends of the two support legs on the same fixed frame are respectively hinged to racks. Each fixed frame has a vertical guide rail parallel to the columns on both sides in the center. The vertical guide rail is provided with a slide block with a locking component. The two racks are movably connected together through the slide block. The support legs can be switched between an extended support state and a retracted state by raising and lowering the slide block.

[0011] As a further embodiment of this utility model, the locking component includes horizontal guide rails spaced vertically on the inner side of the slide block, with two racks slidably inserted into the corresponding horizontal guide rails. A spur gear is rotatably mounted in the center of the slide block via a rotating shaft. The spur gear meshes with racks located on its upper and lower sides. A polygonal locking groove is provided at one end of the spur gear shaft. A locking pin is provided on the slide block, with one end matching the shape of the locking groove. One end of the locking pin extends movably through the outer wall of the slide block and is connected to a handle at the end extending out of the slide block. The other end of the locking pin can be inserted into the locking groove, thereby restricting the rotation of the spur gear.

[0012] The above solution utilizes a rack and pinion linkage mechanism in conjunction with a pull-type locking pin to achieve rapid deployment and retraction of the support legs, significantly improving adjustment efficiency. The structural design of the polygonal locking groove and matching locking pin ensures that the equipment remains stable under vibration conditions, without displacement or loosening, significantly enhancing locking stability and impact resistance, and further improving operational safety.

[0013] As a further embodiment of this utility model, the elastic suspension mechanism includes suspension brackets symmetrically fixed on the left and right sides of the powder storage hopper. A corresponding support crossbar is provided below the suspension bracket. The front and rear ends of the support crossbar are fixed on the frame. Vertically upward guide posts are symmetrically spaced on the support crossbar. The top of the guide post passes through the corresponding suspension bracket. A support spring is sleeved on the guide post. The top of each support spring abuts against the bottom surface of the suspension bracket and the bottom end abuts against the top surface of the support crossbar, so that the powder storage hopper is in an elastic suspension state. The bottom of the weighing sensor is fixed between the two support crossbars, and the top load receiving end of the weighing sensor is connected to the front and rear ends of the suspension bracket through a bearing plate.

[0014] The above solution addresses the issues of weighing accuracy and discharge efficiency inherent in traditional rigid powder storage hoppers by introducing a combination of an elastic suspension support and guide column springs. This effectively isolates the weighing system from vibrations during equipment operation, significantly improving weighing stability and accuracy. Simultaneously, the inclusion of a telescopic connecting pipe effectively compensates for the dynamic displacement of the powder storage hopper during operation, preventing material leakage and damage to connection points. Combined with high-frequency real-time weight monitoring, continuous data acquisition during powder collection is achieved, providing reliable support for subsequent refined control and material management.

[0015] As a further embodiment of this utility model, a rectangular ring handle is provided on the outer side wall of the slide, and the handle is movably disposed within the ring handle.

[0016] As a preferred embodiment of this utility model, a stirring motor with its output shaft inserted downwards into the powder storage hopper is provided at the top of the hopper. The output shaft of the stirring motor extends to the bottom of the hopper and is equipped with a stirring paddle to accelerate the discharge of powder from the discharge port. This solution addresses the problem of low-temperature powders easily adhering and clumping on the inner wall of the powder storage hopper, leading to poor discharge and frequent cleaning. A stirring paddle with a spiral crushing structure is added inside the hopper, and its output shaft extends downwards, allowing the stirring shaft to penetrate deep into the bottom of the hopper. This effectively improves powder flowability, significantly reduces material adhesion and clumping, and significantly accelerates the discharge speed. Simultaneously, the system is equipped with a temperature control module, which can automatically adjust the stirring speed according to different material characteristics, achieving dynamic adaptation to the powder discharge process and improving the applicability and automation level of the equipment in various crushing scenarios.

[0017] As a further embodiment of the present invention, the conveying mechanism includes a conveying pipe connected between the low-temperature cooling chamber and the main hopper, a spiral conveying blade is provided inside the conveying pipe, and a conveying motor for driving the spiral conveying blade to rotate is provided at one end of the spiral conveying blade.

[0018] As a further embodiment of this utility model, the separation device includes a dust discharge box fixed on the top of the frame located above the dust collection hopper, a multi-tube cyclone separator is provided in the inner cavity of the dust discharge box, an exhaust port connected to the inner cavity of the dust discharge box is provided on the outer wall of the dust discharge box, a negative pressure fan is installed on one side of the dust discharge box and connected to the exhaust port, and the dust discharge port of the multi-tube cyclone separator extends into the inside of the dust collection hopper.

[0019] The above solution addresses the problems of severe refrigerant leakage and low dust removal efficiency in traditional equipment during the feeding process. It employs a sealed screw conveyor mechanism to transport materials from the main hopper to the low-temperature cooling chamber in a closed manner, significantly reducing refrigerant loss and effectively maintaining the stability of the cooling environment. The dust removal system incorporates a multi-tube cyclone separator to achieve graded collection of powders of different particle sizes, greatly improving overall separation efficiency. Simultaneously, the negative pressure fan and exhaust port ensure a stable and reliable gas-solid separation process, improving the overall cleanliness and filtration performance of the machine.

[0020] In a preferred embodiment of this invention, a retaining plate is provided around the outer wall of the locking pin, and a locking spring is sleeved on the locking pin. One end of the locking spring abuts against the retaining plate, and the other end abuts against the inner side wall of the slide. The locking spring provides continuous preload and maintains reliable self-locking performance even under extreme conditions such as vibration and impact.

[0021] As a further embodiment of this invention, hinge slots are respectively provided through the left and right columns of the fixed frame in the left-right direction. The support legs are respectively hinged in the corresponding hinge slots, and one end of the rack passes through the hinge slot and is hinged together with one end of the corresponding support leg. The support legs can be completely stored in the specially designed hinge slots, which can effectively prevent damage to the support legs during equipment movement or transportation, and improve the adaptability and durability of the whole machine.

[0022] In summary, the advantages of this invention compared to existing technologies are as follows: This invention, through the combined design of pulleys and a foldable support mechanism, retains the equipment's flexible mobility while achieving a rapidly deployable rigid support mode, fundamentally solving the hidden danger of displacement and overturning of traditional equipment under vibration conditions. The linkage locking structure balances the compactness of the support mechanism in its folded state with its stability after deployment, avoiding structural damage during equipment transportation and transfer, and significantly shortening the time required for switching operating modes. Furthermore, the synergistic effect of the external cooling source and the sealed conveying system significantly improves refrigerant utilization efficiency. The closed feeding channel not only effectively blocks heat exchange with the external environment and prevents disorderly refrigerant dissipation, but also maintains a more stable and uniform low-temperature environment. This improvement also solves the common problem of frost clogging at the feeding port in open systems, ensuring smooth continuous operation.

[0023] Furthermore, in the powder processing stage, the flexible suspended powder storage hopper combined with a vibration isolation mechanism for dynamic weighing significantly improves the accuracy of weighing data. The stirring device on the hopper effectively breaks up powder agglomeration caused by temperature and humidity changes through continuous agitation. Combined with the adaptive deformation capability of the telescopic connecting pipe, smooth material flow is achieved throughout the entire process from crushing to discharge. Simultaneously, the multi-stage separation and dust removal system with optimized airflow paths significantly improves the capture efficiency of fine powders, reducing raw material loss while improving the cleanliness of the working environment.

[0024] In summary, this utility model, through the collaborative innovation of the support system, weighing management unit, and powder processing module, comprehensively improves the operational reliability and environmental adaptability of the equipment under complex working conditions, while possessing both rapid deployment capability and high-efficiency production performance, fully meeting the core needs of modern industry for flexible production and intelligent control. Attached Figure Description

[0025] Figure 1 This is a perspective view of the outriggers of this utility model when they are folded up.

[0026] Figure 2 This is a three-dimensional view of the outriggers of this utility model after they have been deployed, as well as an enlarged view of a local area in the figure.

[0027] Figure 3 This is one of the three-dimensional views of this utility model.

[0028] Figure 4 This is the second perspective view of the present invention.

[0029] Figure 5 This is the third perspective view of the present invention.

[0030] Figure 6 This is a cross-sectional view of the front side of the present invention, and an enlarged view of a local area in the figure.

[0031] Figure 7 This is one of the cross-sectional views on the left side of this utility model.

[0032] Figure 8 This is the second cross-sectional view of the left side of this utility model.

[0033] Figure 9 This is a cross-sectional view of the right side of the present invention, and an enlarged view of a local area in the figure.

[0034] Figure 10 This is a cross-sectional view of the present invention from the front to the middle, and an enlarged view of a local area in the figure.

[0035] Figure 11 This is an exploded view of the present invention, and an enlarged view of a local area in the figure.

[0036] Figure 12 for Figure 11 Enlarged view of point A in the middle.

[0037] Explanation of reference numerals in the attached drawings: 1. Frame; 1a. Pulley; 1b. Support mechanism; 1b1. Fixed frame; 1b1a. Column; 1b1b. Vertical guide rail; 1b1c. Hinge groove; 1b2. Support leg; 1b3. Locking component; 1b3a. Slide; 1b3b. Horizontal guide rail; 1b3c. Spur gear; 1b3d. Locking groove; 1b3e. Locking pin; 1b3g. Baffle; 1b3f. Handle; 1b3h. Rotating shaft; 1b4. Rack; 1b5. Locking spring; 1b6. Ring handle; 1b7. Guide wheel; 1c. Support crossbar; 1c1. Guide column; 1c2. Support spring; 2. Feeding assembly; 2a. Main hopper; 2b. Conveying mechanism; 2c. Conveying pipe; 2d. Spiral conveyor blades; 2e. Conveying motor; 3. Crushing module; 3a. Crushing rotor; 3b. First drive motor; 4. Low-temperature cooling chamber; 4a. Refrigerant interface; 5. Dust removal and separation module; 5a. Negative pressure fan; 5b. Separation device; 5b1. Dust discharge box; 5c. Multi-tube cyclone separator; 5d. Exhaust port; 5e. Dust discharge port; 6. Powder collection hopper; 6a. Lower connection port; 7. Powder storage hopper; 7a. Elastic suspension mechanism; 7a1. Suspension bracket; 7b. Weighing sensor; 7b1. Bearing plate; 7c. Powder discharge port; 7d. Telescopic connecting pipe; 7e. Upper connection port; 8. Stirring motor; 8a. Stirring shaft; 8b. Stirring paddle. Detailed Implementation

[0038] The following detailed description provides various embodiments or examples for implementing this utility model. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0039] Furthermore, spatial terms may be used, such as "below," "lower," "from the inside out," "above," "upper," and similar terms. These relational terms are used to facilitate the description of the relationship between some elements or features in the drawings and other elements or features. These spatial relational terms include different orientations of the device in use or operation, as well as the orientations described in the drawings. The device may be rotated 90 degrees or otherwise to different orientations, and the spatially related adjectives used therein can be interpreted in the same way. Therefore, they should not be construed as limiting the invention. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Figures 1 to 12The novel cryogenic pulverizer shown includes a frame 1, a pulverizing module 3, a feeding component 2 for conveying materials into the pulverizing module 3, a dust removal and separation module 5 for separating dust and gas from the powder pulverized by the pulverizing module 3, and a powder collection hopper 6 and a powder storage hopper 7 connected sequentially below the powder outlet of the pulverizing module 3. The frame 1 is welded from square tubing. The bottom of the frame 1 is equipped with a pulley 1a with a braking function to facilitate the rapid transfer and positioning of the equipment. At the four corners of the frame 1, a flip-open support mechanism 1b is provided. Once the equipment is positioned, it can be unfolded through the support mechanism 1b to provide strong support for the stability of the whole machine, effectively resist the vibration or displacement that may occur during the pulverizing operation, and improve the reliability of operation.

[0041] The crushing module 3, fixed at the top center of the frame 1, is the core operating unit of the entire machine. This crushing module 3 has a built-in low-temperature cooling chamber 4, which can be connected to an external cooling source through a refrigerant interface 4a on the outer wall, providing an extremely low-temperature environment for the material, causing it to rapidly embrittle and enter the crushing state. The low-temperature cooling chamber 4 houses a crushing rotor 3a, driven by a first drive motor 3b also mounted on the top of the frame 1, achieving efficient crushing of the frozen material within the low-temperature cooling chamber 4. The corresponding feeding assembly 2 includes a main hopper 2a mounted on the top of the frame 1 and a conveying mechanism 2b connected to the main hopper 2a. As shown in the figure, in this embodiment, the conveying mechanism 2b uses a multi-section conveying pipe 2c as an example. The material enters the conveying pipe 2c from the main hopper 2a, and the conveying motor 2e fixed at the end of each conveying pipe 2c drives the spiral conveying blades 2d to rotate, propelling the material through a sealed environment to the low-temperature cooling chamber 4. This effectively prevents the refrigerant in the low-temperature cooling chamber 4 from flowing back out of the material inlet, ensuring a continuous and stable cooling effect.

[0042] The dust removal and separation module 5 is installed on top of the frame 1 above the dust collection hopper 6. It is equipped with a negative pressure fan 5a and a separation device 5b. The overall structure adopts a dust discharge box 5b1 installed on top of the frame 1. The dust discharge box 5b1 contains a multi-tube cyclone separator 5c for efficient collection and separation of the dust generated after pulverization. The outer wall of the dust discharge box 5b1 has an exhaust port 5d that communicates with the inner cavity of the dust discharge box 5b1. The negative pressure fan 5a is installed on one side of the dust discharge box 5b1 and connected to the exhaust port 5d to ensure stable gas discharge. Dust settles into the dust collection hopper 6 below through the dust discharge port 5e at the bottom of the multi-tube cyclone separator 5c, forming a continuous and compact collection path to prevent dust backflow and leakage. The purified gas is discharged through the exhaust port 5d, ensuring the cleanliness of the work site and the filtration performance of the system. After the powder is collected in the powder collecting hopper 6, it is introduced into the powder storage hopper 7 through the lower connecting port 6a and the telescopic connecting pipe 7d from the upper connecting port 7e at the top of the powder storage hopper 7. The powder storage hopper 7 is installed on the lower part of the frame 1 by elastic suspension mechanisms 7a arranged symmetrically on both sides. The elastic suspension mechanism 7a adopts a combination structure of suspension bracket 7a1, guide column 1c1 and support spring 1c2, which not only improves the weighing accuracy, but also effectively isolates the interference of mechanical vibration during operation on the weighing system. Specifically, the suspension bracket 7a1 is fixed to the top of the left and right sides of the powder storage hopper 7. The suspension bracket 7a1 is provided with corresponding support crossbar 1c below it. The front and rear ends of the support crossbar 1c are fixed to the frame 1. The bottom end of the guide column 1c1 is fixed to the support crossbar 1c, and the top end passes vertically upward through the corresponding suspension bracket 7a1. The support spring 1c2 is sleeved on the guide column 1c1. The top end of each support spring 1c2 abuts against the bottom surface of the suspension bracket 7a1 and the bottom end abuts against the top surface of the support crossbar 1c, so that the powder storage hopper 7 is in an elastic suspension state. The powder storage hopper 7 has a powder discharge port 7c at its bottom, with a valve on the discharge port 7c for transferring the stored powder out. To monitor the powder weight in the storage hopper 7 in real time, ensuring timely transfer of stored powder and continuous equipment operation, weighing sensors 7b are installed at both ends of the storage hopper 7. The bottom of the weighing sensors 7b is fixed between two supporting crossbars 1c, and the top load receiving end of the weighing sensors 7b is connected to the front and rear ends of the suspension bracket 7a1 via a bearing plate 7b1. This enables real-time monitoring of the powder weight and also allows the entire equipment to be connected to an automated control system. The data measured in real time by the weighing sensors 7b is connected to the control system signals to adjust the feeding speed, refrigerant injection volume, and equipment start / stop based on weight parameters. It should be noted that the feeding component 2, crushing module 3, and dust removal and separation module 5 in this embodiment can all be implemented using existing technologies; therefore, they will not be described in detail here.

[0043] In addition, to solve the problem that low-temperature powder is prone to adhesion and clumping in the hopper, which leads to difficulties in material discharge, a stirring motor 8 with its output shaft inserted downward into the powder storage hopper 7 is provided at the top of the powder storage hopper 7. The output shaft of the stirring motor 8 is provided with a stirring shaft 8a extending towards the bottom of the inner cavity of the powder storage hopper 7. The stirring shaft 8a is provided with a stirring paddle 8b to stir the material at the bottom of the powder storage hopper 7, thereby enhancing the powder flowability and significantly improving the powder discharge efficiency.

[0044] It is important to note that, such as Figures 1 to 12As shown, the support mechanism 1b includes fixed frames 1b1 respectively disposed at the front and rear ends of the frame 1. Each fixed frame 1b1 has two uprights 1b1a on its left and right sides with hinge slots 1b1c extending along the left-right direction. Support legs 1b2, capable of flipping outwards, are hinged within the hinge slots 1b1c. Each support leg 1b2 has a rack 1b4 hinged to its end. In this embodiment, the hinge position of the support leg 1b2 is close to the end hinged to the rack 1b4, which is approximately two-thirds of the way down the support leg 1b2. Each fixed frame 1b1 has a vertical guide rail 1b1b in its center, parallel to the two uprights 1b1a. The non-hinged end of the rack 1b4 extends horizontally from its hinge slot 1b1c towards the central vertical guide rail 1b1b. A slide block 1b3a is slidably mounted on a vertical guide rail 1b1b. The bottom of the slide block 1b3a has a guide wheel 1b7 that can slide along the vertical guide rail 1b1b. Horizontal guide rails 1b3b are spaced vertically on the inner side of the slide block 1b3a, with the openings of the two horizontal guide rails 1b3b facing each other. The non-hinged ends of the racks 1b4 are slidably inserted into the corresponding horizontal guide rails 1b3b. A rectangular ring handle 1b6 is provided on the outer wall of the slide block 1b3a. By gripping the ring handle 1b6, the slide block 1b3a is raised or lowered, causing the racks 1b4 on both sides to move horizontally synchronously and extend and retract in opposite directions, thus switching between the extended and retracted states of the support legs 1b2. Because the support legs 1b2 need to be flipped over and supported on the bottom surface in a V-shape, the entire frame 1 can be stably supported. The slide block 1b3a is also equipped with a locking component 1b3, which includes a spur gear 1b3c mounted in the center of the slide block 1b3a via a rotating shaft 1b3h. The spur gear 1b3c is located between two horizontal guide rails 1b3b and rotates around the rotating shaft 1b3h. The tooth surfaces on the upper and lower sides of the spur gear 1b3c mesh with racks 1b4 located above and below it, respectively. A polygonal locking groove 1b3d is provided at one end of the spur gear 1b3c. A locking pin 1b3e is provided on the slide block 1b3a, one end of which matches the shape of the locking groove 1b3d. The polygonal end of the locking pin 1b3e can be inserted into and engage with the locking groove 1b3d. A baffle 1b3g is provided around the outer wall of the locking pin 1b3e. The end of the locking pin 1b3e away from the baffle 1b3g moves out through the outer wall of the slide block 1b3a and is connected to a handle 1b3f at the end that extends out of the slide block 1b3a. A locking spring 1b5 is fitted onto the locking pin 1b3e. One end of the locking spring 1b5 abuts against the retaining plate 1b3g and the other end abuts against the inner side wall of the slide block 1b3a, continuously providing preload force so that the inner end of the locking pin 1b3e can be inserted into the locking groove 1b3d, thereby restricting the rotation of the spur gear 1b3c.By engaging the spur gear 1b3c with the upper and lower racks 1b4, and with the locking spring 1b5 driving the locking pin 1b3e into the locking groove 1b3d, the support leg 1b2 can be rotated and supported on the bottom surface in a V-shape, forming a stable locking state. This prevents locking failure due to vibration, thus ensuring the stability of the support system during equipment operation. When unlocking is required, pulling the handle 1b3f will pull the locking pin 1b3e out of the locking groove 1b3d, allowing the spur gear 1b3c to rotate again. This releases the rack 1b4 engaged with the spur gear 1b3c, and then pulling the ring handle 1b6 will move the slide 1b3a up and down again, retracting the support leg 1b2 into the corresponding hinge groove 1b1c, improving the safety and compactness of the equipment during transportation and movement. To facilitate quick one-handed adjustment and locking of the support leg 1b2, the handle 1b3f is movably located within the ring handle 1b6. Thus, by simply holding the ring handle 1b6 with one hand and pulling the handle 1b3f outward with four fingers, the support leg 1b2 can be unlocked. Once the support leg 1b2 is fully extended, releasing the handle 1b3f will cause the locking pin 1b3e to automatically insert into the locking groove 1b3d under the action of the locking spring 1b5, thus preventing accidental loosening.

[0045] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel ultra-low temperature pulverizer characterized by, include: The frame (1) is equipped with a pulley (1a) with braking function at the bottom and a rotatable support mechanism (1b) at the four corners. The crushing module (3) is fixed at the top center of the frame (1) and includes a low-temperature cooling chamber (4) that can be connected to an external cooling source, a crushing rotor (3a) that is rotatably set in the low-temperature cooling chamber (4), and a first drive motor (3b) that drives the crushing rotor (3a) to rotate and crush the material. The feeding assembly (2), installed on the top of the frame (1), includes a main hopper (2a) and a conveying mechanism (2b), used to convey the material to the low-temperature cooling chamber (4) for low-temperature embrittlement and then crushing; The dust separation module (5), installed on the top of the frame (1), includes a negative pressure fan (5a) and a separation device (5b) for separating the pulverized dust from the gas; The powder collection hopper (6) is located in the middle of the frame (1) below the crushing module (3), and is connected to the low temperature cooling chamber (4) and the separation device (5b) respectively, for collecting the separated powder; The powder storage hopper (7) is connected to the bottom opening of the powder collection hopper (6) via a telescopic connecting pipe (7d) and is elastically mounted on the frame (1) via an elastic suspension mechanism (7a). Weighing sensors (7b) are provided on both sides of the powder storage hopper (7) to monitor the powder weight in real time, and a powder discharge port (7c) is provided at its bottom.

2. A novel ultra-low temperature pulverizer according to claim 1, characterized in that, The support mechanism (1b) includes fixed frames (1b1) respectively set at both ends of the frame (1). Each fixed frame (1b1) has two vertical columns (1b1a) on the left and right sides with support legs (1b2) that can be flipped and supported on the bottom surface in a V-shape. The ends of the two support legs (1b2) on the same fixed frame (1b1) are respectively hinged with racks (1b4). Each fixed frame (1b1) has a vertical guide rail (1b1b) in the center that is parallel to the two columns (1b1a). The vertical guide rail (1b1b) has a slide (1b3a) with a locking component (1b3). The two racks (1b4) are movably connected together through the slide (1b3a). The support legs (1b2) can switch between the unfolded support state and the retracted state by the up and down movement of the slide (1b3a).

3. A novel ultra-low temperature pulverizer according to claim 2, characterized in that, The locking component (1b3) includes horizontal guide rails (1b3b) spaced vertically on the inner side of the slide (1b3a). Two racks (1b4) are slidably inserted into the corresponding horizontal guide rails (1b3b). A spur gear (1b3c) is rotatably mounted in the center of the slide (1b3a) via a rotating shaft. The spur gear (1b3c) meshes with the racks (1b4) located on its upper and lower sides respectively. One end of the spur gear (1b3c) has a polygonal shape. The slide block (1b3a) has a locking groove (1b3d) with one end matching the shape of the locking groove (1b3d). One end of the locking pin (1b3e) extends out of the outer wall of the slide block (1b3a) and is connected to a handle (1b3f) at the end extending out of the slide block (1b3a). The other end of the locking pin (1b3e) can be inserted into the locking groove (1b3d) to restrict the rotation of the spur gear (1b3c).

4. A novel ultra-low temperature pulverizer according to claim 1, characterized in that, The elastic suspension mechanism (7a) includes a suspension bracket (7a1) symmetrically fixed on the left and right sides of the powder storage hopper (7). A corresponding support crossbar (1c) is provided below the suspension bracket (7a1). The front and rear ends of the support crossbar (1c) are fixed on the frame (1). Vertically upward guide columns (1c1) are symmetrically spaced on the support crossbar (1c). The top of the guide column (1c1) passes through the corresponding suspension bracket (7a1). A support spring (1c2) is sleeved on the guide column (1c1). The top of each support spring (1c2) abuts against the bottom surface of the suspension bracket (7a1) and the bottom end abuts against the top surface of the support crossbar (1c), so that the powder storage hopper (7) is in an elastic suspension state. The bottom of the weighing sensor (7b) is fixed between the two support crossbars (1c). The top load receiving end of the weighing sensor (7b) is connected to the front and rear ends of the suspension bracket (7a1) through the bearing plate (7b1).

5. A novel ultra-low temperature pulverizer according to claim 3, characterized in that, A rectangular ring handle (1b6) is provided on the outer side wall of the slide (1b3a), and the handle (1b3f) is movably disposed within the ring handle (1b6).

6. A novel ultra-low temperature pulverizer according to claim 1, characterized in that, A stirring motor (8) with its output shaft inserted downward into the powder storage hopper (7) is provided at the top of the powder storage hopper (7). The stirring motor (8) has a stirring shaft (8a) extending to the bottom of the inner cavity of the powder storage hopper (7) on its output shaft. The stirring shaft (8a) has a stirring paddle (8b) to accelerate the discharge of powder from the powder discharge port (7c).

7. A novel ultra-low temperature pulverizer according to claim 1, characterized in that, The conveying mechanism (2b) includes a conveying pipe (2c) connecting the low-temperature cooling chamber (4) and the main hopper (2a), a spiral conveying blade (2d) is provided in the conveying pipe (2c), and a conveying motor (2e) is provided at one end of the spiral conveying blade (2d) to drive its rotation.

8. A novel cryogenic pulverizer according to claim 1, characterized in that, The separation device (5b) includes a dust discharge box (5b1) fixed on the top of the frame (1) above the dust collection hopper (6). A multi-tube cyclone separator (5c) is provided in the inner cavity of the dust discharge box (5b1). An exhaust port (5d) communicating with the inner cavity of the dust discharge box (5b1) is provided on the outer wall of the dust discharge box (5b1). The negative pressure fan (5a) is installed on one side of the dust discharge box (5b1) and connected to the exhaust port (5d). The dust discharge port (5e) of the multi-tube cyclone separator (5c) extends into the inside of the dust collection hopper (6).

9. A novel cryogenic pulverizer according to claim 3, characterized in that, A baffle (1b3g) is provided around the outer wall of the locking pin (1b3e), and a locking spring (1b5) is sleeved on the locking pin (1b3e). One end of the locking spring (1b5) abuts against the baffle (1b3g), and the other end abuts against the inner side wall of the slide (1b3a).

10. A novel cryogenic pulverizer according to claim 9, characterized in that, Hinges (1b1c) are respectively passed through the left and right columns (1b1a) of the fixed frame (1b1) along the left and right directions. The support legs (1b2) are respectively hinged in the corresponding hinges (1b1c). One end of the rack (1b4) passes through the hinges (1b1c) and is hinged together with one end of the corresponding support leg (1b2).

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