Polytetrafluoroethylene regenerated powder production device and method

Abstract

The present application relates to the field of regenerating powder production, and particularly relates to a polytetrafluoroethylene regenerating powder production device, a processing cabin is arranged in the middle of the machine body, an arc-shaped guide plate is arranged on the inner cavity of the processing cabin, a plurality of crushing block mechanisms are arranged below the arc-shaped guide plate, the crushing block mechanisms are driven to rotate through a motor cabin, the crushing block mechanisms are connected with a liquid nitrogen conveying mechanism, a filter screen one and a filter screen two are arranged below the crushing block mechanisms, and a disc-shaped concave cavity material guiding disc is arranged below the filter screen two. In the present application, the material is frozen and softened by liquid nitrogen to improve the crushing efficiency, after multi-stage crushing, the material enters a rotating cabin and is sprayed and impacted on the cabin wall by high-speed airflow, multi-stage crushing is realized by combining with rotary crushing, the material falls to the bottom of the cabin and is re-sucked into the rotating cabin by negative pressure for circulating treatment, a magnetic separation mechanism is arranged in the separating cabin to adsorb magnetic debris, when the magnetic debris accumulates to a set threshold, the separating cabin performs magnetic debris removal operation, and multi-stage crushing and rapid separation and collection of the magnetic debris are realized.

Description

Technical Field

[0001] This invention relates to the field of recycled powder production technology, and in particular to a polytetrafluoroethylene recycled powder production apparatus and method. Background Technology

[0002] Polytetrafluoroethylene (PTFE) is a commonly used plastic raw material. After the PTFE production process, the material can be recycled and reused. By crushing the material and mixing it with fillers, recycled PTFE powder can be obtained. Recycling PTFE powder can reduce the cost of manufacturing plastic products and improve the utilization rate of waste materials.

[0003] Existing equipment for recycling polytetrafluoroethylene (PTFE) materials often requires a crushing process beforehand. However, traditional crushing equipment operates at room temperature and uses a single crushing roller. Since PTFE materials at room temperature are highly ductile, they cannot be effectively crushed. Furthermore, some recyclable magnetic impurities remain in the crushed material, making it impossible for traditional equipment to effectively recycle them. This affects the properties of recycled plastic products. Therefore, there is an urgent need for a PTFE recycled powder production device. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a polytetrafluoroethylene (PTFE) recycled powder production apparatus and method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A polytetrafluoroethylene (PTFE) recycled powder production device includes a machine body. A processing chamber is provided in the middle of the machine body. An arc-shaped guide plate is provided in the upper part of the inner cavity of the processing chamber. A multi-layer crushing block mechanism is provided below the arc-shaped guide plate. The crushing block mechanism is driven to rotate by a motor chamber. The crushing block mechanism is connected to a liquid nitrogen conveying mechanism. A filter screen one and a filter screen two are installed below the crushing block mechanism. A disc-shaped concave cavity feeding plate is installed below the filter screen two.

[0007] The bottom of the disc-shaped concave feeding plate is connected to the rotating chamber. The interior of the rotating chamber is provided with a pair of material channels. One end of the material channel is connected to the conical air passage, which is connected to the interior of the processing chamber.

[0008] The rotating chamber is installed at the bottom of the processing chamber. A separation chamber is installed inside the rotating chamber. A circulation chamber is formed between the outer wall of the separation chamber and the inner wall of the rotating chamber. The upper and lower walls of the circulation chamber are respectively provided with a negative pressure outlet and a negative pressure inlet. Collection chambers are provided on both sides of the circulation chamber. The collection chambers are in contact with the side walls of the separation chamber in their natural state. An adsorption plate is installed on the side of the separation chamber facing the circulation chamber through an installation groove.

[0009] The separation chamber is driven to rotate by a ring linear motor. When the separation chamber is in the magnetic debris collection process, the separation chamber rotates and faces the collection chamber. The top and walls of the collection chamber are equipped with top rods that slide into the arc-shaped grooves opened on the upper and lower walls of the adsorption plate. The top rods drive the adsorption plate to shift towards the inside of the collection chamber and disconnect the electrical connection with the electromagnet controller.

[0010] Preferably, the crushing block mechanism includes a motor compartment, crushing blocks, and a hollow shaft. The motor compartment is fixedly installed in the middle of the disc-shaped concave feeding plate. A motor drive assembly is provided inside the motor compartment. The output end of the motor drive assembly is connected to the hollow shaft. The hollow shaft extends out of the upper wall of the motor compartment and is rotatably connected to the bottom wall of the arc-shaped guide plate. A multi-layer crushing unit group is installed in the middle of the hollow shaft. Each crushing unit group includes a connecting rod and a crushing block. The crushing block is installed on the hollow shaft through the connecting rod. An air nozzle is installed on the outer wall of the crushing block. The air nozzle is connected to the liquid nitrogen conveying mechanism.

[0011] Preferably, the liquid nitrogen delivery mechanism is mounted on one side of the machine body. The output end of the liquid nitrogen delivery mechanism is connected to a liquid nitrogen delivery pipe. The liquid nitrogen delivery pipe passes through the machine body and the disc-shaped concave feeding plate and extends into the motor compartment. The liquid nitrogen delivery pipe passes into the hollow shaft and branches into multiple branch pipes. Each branch pipe extends into each connecting rod and is connected to the jet nozzle.

[0012] A rotary joint is provided at the connection between the liquid nitrogen delivery pipe and the motor compartment.

[0013] Preferably, the upper part of the processing chamber is provided with a feed inlet, and an arc-shaped guide plate is provided directly below the feed inlet. The bottom side wall of the arc-shaped guide plate is left with a gap between it and the interior of the processing chamber to allow material to pass through.

[0014] Preferably, a connecting plate is installed at the center of the processing chamber, a disc-shaped concave cavity feeding plate is fixedly installed on the upper part of the connecting plate, a rotating chamber is installed below the connecting plate, an arc-shaped feeding port is opened in the middle of the rotating chamber, an air pump is installed in the middle of the arc-shaped feeding port, and the arc-shaped feeding port is connected to a channel opened in the middle of the disc-shaped concave cavity feeding plate.

[0015] Material channels are connected to both sides of the bottom of the arc-shaped feed inlet. The material channels extend outward and are connected to the conical air passage. The jet output end of the air pump is oriented towards each material channel.

[0016] Preferably, a drive motor is installed at the bottom of the inner part of the machine body. The output end of the drive motor extends into the processing chamber and is connected to the rotating chamber. A gap is left between the rotating chamber and the inner wall of the processing chamber. Multiple crushing blocks are installed on the outer wall of the rotating chamber. A conical air passage is provided above the crushing blocks.

[0017] The inner wall of the processing chamber is equipped with a ring of arc-shaped convex walls, the arc of which is directly opposite the conical air passage, and the upper part of the arc-shaped convex walls is provided with vent holes that are connected to the outside.

[0018] Preferably, a partition is installed in the middle of the mounting groove, and limit holes are opened at the four corners of the partition to connect with the guide rod. One end of the guide rod extends into the separation chamber and the other end is connected to the inner side of the adsorption plate. A spring is installed between the inner wall of the adsorption plate and the partition. The spring is sleeved on the outside of the guide rod, and the spring deforms when the adsorption plate is displaced.

[0019] Preferably, a discharge chamber is provided at the bottom of the inner wall of the processing chamber. The discharge chamber is annular, and an electric opening and closing plate is installed on the upper side of the discharge chamber. One side of the discharge chamber is connected to the material extraction pipe.

[0020] Preferably, a docking groove is provided on one side of the collection chamber, and slots are provided in the middle of the upper and lower walls of the docking groove. A top rod is installed in the slot, and the top rod and the arc-shaped grooves provided on the upper and lower walls of the adsorption plate are docking mechanisms. An arc-shaped protrusion is provided in the middle of the arc-shaped groove, and a limiting groove is provided in the middle of the arc-shaped protrusion.

[0021] The outer wall of the middle part of the top rod is pressed against a filling rubber block, and one end of the top rod extends into the collection chamber and is connected to the vibration motor.

[0022] A method for producing recycled polytetrafluoroethylene powder includes the following steps:

[0023] S1. The material enters the processing chamber and is subjected to rotary crushing by a high-speed rotating crushing block mechanism. At the same time, liquid nitrogen is added during the crushing process to quickly freeze the material, accelerate the material embrittlement, and improve the crushing efficiency.

[0024] S2. After multi-stage crushing, the material falls naturally and enters the rotating chamber under negative pressure. High-speed airflow flows in the rotating chamber to quickly spray the material from the rotating chamber onto the inner wall of the processing chamber for impact. Under the rotating crushing operation in the rotating chamber, multiple crushing operations of impact and rotation are achieved.

[0025] S3. The crushed material falls to the bottom of the processing chamber and is sucked into the rotating chamber under the negative pressure of the airflow. At this time, the separation chamber adsorbs the magnetic debris.

[0026] S4. Unadsorbed material continues to participate in the circulating crushing process through the negative pressure flow port, and when the magnetic debris in the separation chamber reaches the collection threshold, the separation chamber automatically performs magnetic debris removal and collection operations.

[0027] The beneficial effects of this invention are as follows:

[0028] In this invention, the material is frozen and embrittled with liquid nitrogen in the processing chamber to improve the crushing efficiency. After multi-stage crushing, the material enters the rotating chamber through negative pressure airflow and is sprayed and impacted by high-speed airflow. Combined with rotational crushing, multiple crushing is achieved. After the crushed product falls to the bottom of the chamber, it is re-inhaled into the rotating chamber by the negative pressure system for recycling. The separation chamber has a built-in magnetic separation mechanism to adsorb magnetic debris. When the magnetic debris accumulates to a set threshold, the separation chamber automatically performs magnetic debris removal operation, realizing multiple crushing and rapid sorting and collection of magnetic debris, significantly improving crushing efficiency and ensuring crushing quality. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the external structure of a polytetrafluoroethylene recycled powder production device proposed in this invention.

[0030] Figure 2 This is a cross-sectional view of the internal structure of a polytetrafluoroethylene recycled powder production device proposed in this invention.

[0031] Figure 3 This is a schematic diagram of the installation structure of the crushing block mechanism proposed in this invention;

[0032] Figure 4 This is an exploded schematic diagram of the crushing block mechanism proposed in this invention;

[0033] Figure 5 This is a schematic diagram of the installation position structure of the filter screen two proposed in this invention;

[0034] Figure 6 This is a schematic diagram of the liquid nitrogen delivery pipe connection structure proposed in this invention;

[0035] Figure 7 This is an exploded view of the rotating cabin installation structure proposed in this invention;

[0036] Figure 8 This is a cross-sectional view of the material channel structure proposed in this invention;

[0037] Figure 9 This is a cross-sectional view of the internal structure of the rotating cabin proposed in this invention;

[0038] Figure 10 This is a schematic diagram of the separation chamber installation structure proposed in this invention;

[0039] Figure 11 This is a schematic diagram of the adsorption plate installation structure proposed in this invention;

[0040] Figure 12 This is a schematic diagram of the mounting slot installation structure proposed in this invention;

[0041] Figure 13 This is a schematic diagram showing the positional relationship between the separation chamber and the collection chamber proposed in this invention;

[0042] Figure 14 This is a schematic diagram of the collection chamber structure proposed in this invention;

[0043] Figure 15 This is a schematic diagram of the internal cross-section of the collection chamber proposed in this invention;

[0044] Figure 16 This is a schematic diagram of the external structure of the adsorption plate proposed in this invention;

[0045] Figure 17 This is a schematic diagram of the structure at point A proposed in this invention;

[0046] Figure 18 This is a schematic diagram of the conductive terminal structure proposed in this invention;

[0047] Figure 19 This is a schematic diagram of the connection structure of the adsorption plate and the docking groove proposed in this invention;

[0048] Figure 20 This is a schematic diagram of the top rod connection structure proposed in this invention.

[0049] In the diagram: 1. Machine body; 2. Liquid nitrogen conveying mechanism; 201. Liquid nitrogen conveying pipe; 202. Rotary joint; 3. Feed inlet; 301. Processing chamber; 4. Arc-shaped guide plate; 5. Filter screen one; 51. Filter screen two; 52. Crushed block; 521. Air nozzle; 53. Connecting ring; 54. Motor compartment; 541. Motor drive assembly; 55. Connecting rod; 6. Rotary chamber; 61. Circulation chamber; 611. Arc-shaped convex wall; 62. Crushed block; 63. Conical air passage; 64. Material passage; 641. Arc-shaped guide port; 7. Separation chamber; 71. Adsorption plate; 711. Rubber convex strip; 72. Mounting groove; 73. Partition plate; 731. Limiting hole; 74. Arc-shaped groove; 741. Arc-shaped protrusion. 742. Limiting groove; 8. Air pump; 9. Disc-shaped concave feeding plate; 91. Channel one; 10. Connecting plate; 11. Vent hole; 12. Drive motor one; 13. Hollow shaft; 14. Circular linear motor; 15. Collection chamber; 151. Top rod; 152. Docking groove; 16. Negative pressure outlet; 161. Negative pressure suction port; 17. Stirring rod; 18. Conductive end; 19. Electromagnetic controller; 191. Conductive insert; 1911. Copper contact; 20. Guide rod; 21. Spring; 22. Micro switch; 23. Electric opening and closing plate one; 24. Electric opening and closing plate two; 25. Material extraction pipe; 251. Discharge chamber; 26. Filling rubber block; 27. Vibration motor. Detailed Implementation

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0051] Reference Figure 1-6 A polytetrafluoroethylene recycled powder production device includes a machine body 1, with a feed inlet 3 provided on the upper part of the machine body 1 to introduce materials, and the materials enter the processing chamber 301 provided inside the machine body 1 through the feed inlet 3.

[0052] A disc-shaped concave feeding plate 9 is installed in the middle of the processing chamber 301. A motor chamber 54 is fixedly installed in the middle of the disc-shaped concave feeding plate 9. The motor chamber 54 drives the multi-layer crushing block mechanism to rotate through the hollow shaft 13. Each crushing block mechanism includes multiple crushing blocks 52, and the outer wall of each crushing block 52 leaves a certain gap with the inner wall of the processing chamber 301 to crush the material.

[0053] An arc-shaped guide plate 4 is provided above the uppermost crushing block mechanism. The arc-shaped guide plate 4 is located directly below the feed inlet 3. After the material enters the processing chamber 301 through the feed inlet 3, it comes into contact with the surface of the arc-shaped guide plate 4 and is discharged to the bottom edge of the arc-shaped guide plate 4 through the arc design. A gap is left between the bottom edge of the arc-shaped guide plate 4 and the processing chamber 301 to allow the material to pass through.

[0054] A filter screen 5 is located below the uppermost crushing block mechanism, and a filter screen 51 is located below the lowermost crushing block mechanism. The filter pore diameter of the filter screen 5 is larger than that of the filter screen 51. A disc-shaped concave feeding plate 9 is installed below the filter screen 51. Multiple channels 91 are provided in the middle of the disc-shaped concave feeding plate 9 to allow material to pass through.

[0055] The bottom end of the disc-shaped concave feeding plate 9 is connected to the connecting plate 10. The connecting plate 10 is fixedly installed in the middle of the processing chamber 301. A circular channel is opened in the middle of the connecting plate 10 to connect multiple channels 91. The material enters the circular channel opened inside the connecting plate 10 through the multiple channels 91.

[0056] The center of the disc-shaped concave feed plate 9 is designed as a concave structure to improve material flow efficiency, and the concave cavity is connected to channel 91.

[0057] A rotating chamber 6 is installed below the connecting plate 10. The rotating chamber 6 is driven to rotate by a drive motor 12. A separation chamber 7 is installed in the middle of the rotating chamber 6.

[0058] The machine body 1 is equipped with a drive motor 12. The output end of the drive motor 12 extends into the processing chamber 301 and is connected to the rotating chamber 6.

[0059] Furthermore, the outer side of the arc-shaped guide plate 4 is fixedly connected to the processing chamber 301 via a bracket, and the outer sides of filter screen 1 5 and filter screen 2 51 are fixedly connected to the inner wall of the processing chamber 301. Crushing block mechanisms are rotatably arranged between the arc-shaped guide plate 4 and filter screen 1 5, and between filter screen 1 5 and filter screen 2 51.

[0060] The multiple sets of crushing blocks 52 in the crushing block mechanism are all connected to the hollow shaft 13 via connecting rods 55. The hollow shaft 13 is driven to the output end of the motor drive assembly 541 inside the motor compartment 54. The motor drive assembly 541 includes a drive mechanism composed of a motor and a bevel gear set. The output end of the motor drive assembly 541 is connected to the hollow shaft 13. The hollow shaft 13 extends out of the top of the motor compartment 54 and is rotatably connected to the bottom wall of the arc-shaped guide plate 4.

[0061] In addition, a liquid nitrogen conveying mechanism 2 is provided on one side of the machine body 1. The output end of the liquid nitrogen conveying mechanism 2 is connected to a liquid nitrogen conveying pipe 201. The liquid nitrogen conveying pipe 201 extends into the inside of the disc-shaped concave feeding plate 9 and extends into the motor compartment 54. The liquid nitrogen conveying pipe 201 passes through the inside of the hollow shaft 13 and is provided with multiple branch pipes. Each branch pipe is installed in a connecting rod 55. One end of each connecting rod 55 is connected to a crushing block 52. A jet nozzle 521 is provided in the middle of the crushing block 52. The jet nozzle 521 is connected to the corresponding branch pipe.

[0062] A rotary joint 202 is provided at the connection between the motor compartment 54 and the liquid nitrogen delivery pipe 201.

[0063] In addition, the outer wall of each crushing block 52 is provided with concave and convex textures, which improve the friction crushing efficiency, and each crushing block 52 is connected into a whole by a connecting ring 53.

[0064] Reference Figure 7-13 A drive motor 12 is installed on the bottom side of the interior of the machine body 1. The output end of the drive motor 12 extends into the interior of the processing chamber 301 and is driven by the rotating chamber 6. An arc-shaped guide port 641 is provided in the middle of the upper end of the rotating chamber 6. Material channels 64 are connected to both sides of the arc-shaped guide port 641. One end of the material channel 64 extends outward and is connected to the conical air passage 63. The wide opening of the conical air passage 63 faces the material channel 64, and the narrow opening extends outward and penetrates the outer wall of the rotating chamber 6, and is connected to the interior of the processing chamber 301.

[0065] An air pump 8 is installed in the middle of the rotating chamber 6. The upper part of the air pump 8 is supported and connected to the motor chamber 54 through a mounting base. The two output ports of the air pump 8 are respectively facing each material channel 64.

[0066] Multiple crushing blocks 62 are symmetrically arranged on the outer wall of the rotating chamber 6. The crushing blocks 62 are at a certain distance from the inner wall of the processing chamber 301 to crush the material. A conical air passage 63 is arranged above the crushing blocks 62.

[0067] The inner wall of the processing compartment 301 is provided with an arc-shaped convex wall 611 in the middle. The arc-shaped inclined surface of the arc-shaped convex wall 611 is directly opposite the conical air passage 63, and there is a certain distance between the arc-shaped convex wall 611 and the conical air passage 63. The upper non-inclined section of the arc-shaped convex wall 611 is provided with a horizontal vent hole 11 for exhaust. The vent hole 11 is connected to the interior of the body 1 and is discharged to the outside through the vent pipe provided inside the body 1.

[0068] The bottom of the rotating chamber 6 has a slot for installing a ring linear motor 14. The moving end of the ring linear motor 14 is connected to the bottom wall of the separation chamber 7. The separation chamber 7 is assembled inside the rotating chamber 6, and a pair of protruding collection chambers 15 are provided inside the rotating chamber 6. Circulation chambers 61 are respectively provided on both sides of the collection chambers 15.

[0069] The assembly gap between the separation chamber 7 and the rotating chamber 6 forms the circulation cavity 61.

[0070] The bottom wall of the circulation chamber 61 is provided with a negative pressure suction port 161, which is connected to the interior of the processing chamber 301.

[0071] The top wall of the circulation chamber 61 is provided with a negative pressure outlet 16, which is connected to the material channel 64.

[0072] Furthermore, an installation groove 72 is provided on the side of the outer wall of the separation chamber 7 facing the circulation chamber 61. A partition 73 is provided in the middle of the installation groove 72, and an adsorption plate 71 is provided on the side away from the partition 73. The adsorption plate 71 protrudes slightly from the outer wall of the separation chamber 7, and guide rods 20 are provided at the four corners of the inner side of the separation chamber 7. The guide rods 20 pass through the partition 73 and extend into the installation groove 72, and the adsorption plate 71 moves linearly through the guide rods 20.

[0073] Multiple springs 21 are connected between the adsorption plate 71 and the partition plate 73. The springs 21 are fitted onto each guide rod 20 and deform when the adsorption plate 71 is displaced.

[0074] A micro switch 22 is provided on the side away from the guide rod 20. The micro switch 22 is installed inside the separation chamber 7. In its natural state, there is a pre-trigger distance between the trigger end of the micro switch 22 and the guide rod 20.

[0075] Guide rods 20 are installed at the four corners of the inner side of the adsorption plate 71. The guide rods 20 are installed in the limiting holes 731 opened at the four corners of the partition plate 73.

[0076] Furthermore, a discharge chamber 251 is provided at the bottom of the inner wall of the processing chamber 301. The discharge chamber 251 is annular, and an electric opening and closing plate 24 is installed on the upper side of the discharge chamber 251. One side of the discharge chamber 251 is connected to the material extraction pipe 25. The electric opening and closing plate 24 is in a closed state in its natural state.

[0077] Reference Figure 12 , Figure 16 , Figure 18 A conductive end 18 is installed in the middle of the inner side of the adsorption plate 71. The conductive end 18 extends to one side of the separation chamber 7 and docks with the conductive plug 191. The conductive plug 191 is installed in the middle of the mounting groove 72 and is electrically connected to the output end of the electromagnet controller 19. The inner wall of the conductive plug 191 is provided with multiple copper contacts 1911, and the conductive end 18 is allowed to move a certain distance linearly within the conductive plug 191.

[0078] The electromagnet controller 19 excites the adsorption plate 71 to generate electromagnetic attraction.

[0079] The conductive end 18 is connected to the adsorption plate 71 via a wire.

[0080] Reference Figure 11 , Figure 13 Rubber protrusions 711 are provided on both sides of the adsorption plate 71. The rubber protrusions 711 protrude from the outer wall of the adsorption plate 71 in the natural state and are attached to both sides of the outer wall of the collection chamber 15.

[0081] Reference Figure 13-17 , Figures 19-20 A docking groove 152 is provided on one side of the middle of the collection chamber 15. The docking groove 152 is used to dock the adsorption plate 71. A top rod 151 is installed in the middle of the top and bottom walls of the docking groove 152. One end of the top rod 151 is connected to the vibration motor 27. The vibration motor 27 runs to drive the top rod 151 to vibrate. A filling rubber block 26 is wrapped around the outside of the top rod 151. The filling rubber block 26 allows the top rod 151 to make a certain irregular vibration displacement.

[0082] The collection chamber 15 has a space for storing magnetic debris, and an electric opening and closing plate 23 is installed on the bottom wall of the collection chamber 15. When the electric opening and closing plate 23 is opened, the collection chamber 15 is connected to the interior of the processing chamber 301.

[0083] Furthermore, the upper and lower walls of the adsorption plate 71 are provided with arc-shaped grooves 74. The arc-shaped grooves 74 and the top rod 151 are sliding docking mechanisms. When the separation chamber 7 rotates and moves towards the collection chamber 15, one side of the arc-shaped groove 74 docks with the top rod 151.

[0084] An arc-shaped protrusion 741 is provided in the middle of the arc-shaped groove 74. When the arc-shaped protrusion 741 contacts the top rod 151, the adsorption plate 71 is pushed in the opposite direction by the top rod 151 and moves towards the inside of the collection chamber 15.

[0085] A limiting groove 742 is provided in the middle of the arc-shaped protrusion 741. When the separation chamber 7 rotates and moves to the end of its stroke, the push rod 151 engages with the limiting groove 742.

[0086] When the adsorption plate 71 is displaced, the conductive end 18 is limited to move within the conductive insert 191.

[0087] In this embodiment, the polytetrafluoroethylene material after preliminary crushing enters the processing chamber 301 inside the machine body 1 through the feed port 3, and is dispersed and guided to the bottom by the arc-shaped guide plate 4, so that it enters the crushing block mechanism. At the same time, the liquid nitrogen conveying mechanism 2 conveys liquid nitrogen to the crushing block mechanism through the liquid nitrogen conveying pipe 201. At this time, the material falls into the working area of ​​the crushing block mechanism of the first layer. The crushing block 52 is driven by the motor chamber 54 to rotate at high speed. During the rotation, liquid nitrogen is sprayed out through the jet nozzle 521, which lowers the temperature of the overall crushing area and rapidly freezes the falling material. At this time, all materials inside the material, including the polytetrafluoroethylene raw material and other impurities, are rapidly frozen.

[0088] After being pulverized to the corresponding particle size by the rotation of the pulverizing block 52, the material passes through the filter screen 5. At this time, the material enters the working area of ​​the second-layer pulverizing block mechanism and continues to be frozen and rapidly rotated and ground. When the material is ground to the corresponding particle size to pass through the filter screen 51, the material falls into the disc-shaped concave cavity feeding plate 9 set below the filter screen 51. The disc-shaped concave cavity feeding plate 9 has multiple channels 91 in the middle, so that the frozen and pulverized material enters the rotating chamber 6 through the concave cavity set in the channels 91.

[0089] The arc-shaped guide port 641 in the middle of the rotating chamber 6 guides the falling material to the material channels 64 on both sides. At this time, the air pump 8 continuously sprays high-speed gas into the material channel 64. Under the action of natural flow and negative air pressure, the airflow carries the material through the arc-shaped guide port 641 and continuously into the material channel 64. The material channel 64 is connected to the conical air passage 63. The conical air passage 63 allows the gas to carry the material out of the rotating chamber 6 and impact the inner wall of the processing chamber 301. At this time, an arc-shaped convex wall 611 is provided at the corresponding impact position. The inclined arc surface of the arc-shaped convex wall 611 allows the airflow to carry the material downward first, and allows part of the airflow to pass through the gap between the arc-shaped convex wall 611 and the rotating chamber 6, and then be discharged to the outside through the vent 11.

[0090] Synchronously, the drive motor 12 drives the rotating chamber 6 to rotate at a constant speed, and crushes the downward flowing material through the crushing block 62. The crushed material eventually falls onto the inner bottom wall of the processing chamber 301. As the rotating chamber 6 rotates continuously, the stirring rod 17 at the bottom of the rotating chamber 6 agitates the material, increasing its fluidity. As the air pump 8 continuously sprays high-speed gas, the negative pressure generated by the high-speed airflow causes the material falling to the bottom to be adsorbed into the circulation chamber 61 through the negative pressure suction port 161 at the bottom of the rotating chamber 6. At this time, the adsorption plate 71 on one side of the circulation chamber 61 adsorbs impurities. However, due to the material properties of polytetrafluoroethylene, it is not adsorbed by the adsorption plate 71, so that the polytetrafluoroethylene raw material and impurities are separated in this area.

[0091] Then, the unadsorbed material is discharged through the negative pressure outlet 16 and introduced into the material channel 64 for repeated crushing and re-absorption.

[0092] As the material on the adsorption plate 71 gradually increases, the force it generates increases, causing the adsorption plate 71 to shift towards the body of the separation chamber 7. At this time, the spring 21 is compressed, the guide rod 20 moves towards the micro switch 22, and the conductive end 18 in the middle slides naturally inside the conductive insert 191.

[0093] When the guide rod 20 contacts the micro switch 22, the micro switch 22 is activated by the control module to run the ring linear motor 14, and the air pump 8 and drive motor 12 stop running, and the magnetic debris collection process is carried out. The ring linear motor 14 drives the separation chamber 7 to rotate, so that the rubber protrusions 711 on both sides of the adsorption plate 71 are squeezed against the outer wall of the collection chamber 15 to produce deformation. As the rotation continues, the rubber protrusions 711 are eventually compressed and the adsorption plate 71 enters the collection chamber 15.

[0094] Then, the top rod 151 on the collection chamber 15 will connect with the arc groove 74 on the top and bottom walls of the adsorption plate 71. After moving to the designated position, the raised arc-shaped protrusion 741 in the middle of the arc groove 74 will contact the top rod 151. Since the adsorption plate 71 is movable, it will move towards the inside of the collection chamber 15 under relative compression.

[0095] Synchronously, when the adsorption plate 71 moves outward, the conductive end 18 disengages from the conductive insert 191. At this time, the copper contact 1911 no longer contacts the conductive end 18, and the electromagnet controller 19 cannot activate the adsorption plate 71 to generate electromagnetic attraction. At this time, the magnetic debris adsorbed on the adsorption plate 71 gradually falls into the collection chamber 15.

[0096] At the same time, the top rod 151 vibrates due to the operation of the vibration motor 27, and excites the middle part of the adsorption plate 71 to improve the efficiency of debris falling.

[0097] In practical applications, after the magnetic debris collection process is completed, the separation chamber 7 is reset, and according to the actual processing requirements, the electric opening and closing plate 24 is opened to allow the non-magnetic debris material that has fallen into the processing chamber 301 to fall into the discharge chamber 251, and the material is extracted by the external material extraction mechanism in conjunction with the material extraction pipe 25.

[0098] The collection chamber 15 collects and stores magnetic debris. After multiple operations, the electric opening and closing plate 23 is opened to discharge the magnetic debris into the processing chamber 301. The electric opening and closing plate 24 is opened to allow the magnetic debris to fall into the discharge chamber 251. The external material extraction mechanism, in conjunction with the material extraction pipe 25, extracts the material.

[0099] In practical applications, the micro switch 22 is connected to the control module. When the micro switch 22 is pushed and triggered, the control module stimulates the ring linear motor 14 to run.

[0100] In its natural state, the rubber protrusion 711 seals the edge of the collection chamber 15, ensuring the airtightness of the circulation chamber 61 and the stability of the separation chamber 7 when it is stationary.

[0101] The stirring rod 17 agitates the material falling to the bottom, increasing its fluidity for easier absorption.

[0102] In practical applications, the multiple copper contacts 1911 ensure current flow even when the conductive end 18 is displaced a small distance.

[0103] Furthermore, in this device, the material enters the processing chamber 301 and is subjected to rotary crushing by a high-speed rotating crushing block mechanism. Simultaneously, liquid nitrogen is added during the crushing process to quickly freeze the material, accelerate its embrittlement, and improve crushing efficiency. After multi-stage crushing, the material falls naturally and enters the rotating chamber 6 under negative air pressure. High-speed airflow flows through the rotating chamber 6 to rapidly spray the material from the rotating chamber 6 onto the inner wall of the processing chamber 301 for impact. Under the rotary crushing operation of the rotating chamber 6, multiple crushing operations of impact and rotation are achieved. The crushed material falls to the bottom of the processing chamber 301 and is sucked into the rotating chamber 6 under the action of negative air pressure. At this time, the separation chamber 7 adsorbs magnetic debris, and the unadsorbed material continues to participate in the cyclic crushing process through the negative pressure flow port. When the magnetic debris in the separation chamber 7 reaches the collection threshold, the separation chamber 7 rotates into the collection chamber 15, where the separation chamber 7 automatically performs magnetic debris removal and collection.

[0104] Of particular note is the rotary joint 202, specifically a sealed rotary connector, which allows the connected pipes to rotate relative to each other through an internal precision sealing structure while transmitting the medium. This is a conventional configuration in the field. The rotary joint 202 ensures that the liquid nitrogen delivery pipe 201 is not affected by the rotation of the branch pipe.

[0105] Of particular note is the motor drive assembly 541, which specifically includes a drive mechanism consisting of a motor and a bevel gear set. The motor drives the bevel gear set to rotate in conjunction, thereby driving the hollow shaft 13 to rotate. This is a conventional mechanical transmission configuration in the field and will not be explained further.

[0106] It is worth noting that the stator end (base) of the ring linear motor 14 is installed inside the rotating chamber 6, and the mover end is connected to the separation chamber 7. In its natural state, the separation chamber 7 is naturally locked in the circulation chamber 61 by the rubber protrusion 711, and the separation chamber 7 rotates with the rotating chamber 6.

[0107] It is worth noting that the electromagnet controller 19 specifically generates electromagnetic attraction by energizing the adsorption plate 71 through the conductive insert 191 and the conductive end 18. The adsorption plate 71 is specifically an electromagnetic adsorption plate.

[0108] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A polytetrafluoroethylene (PTFE) recycled powder production apparatus, comprising a body (1), characterized in that, The machine body (1) is provided with a processing chamber (301) in the middle. The upper part of the inner cavity of the processing chamber (301) is provided with an arc-shaped guide plate (4). A multi-layer crushing block mechanism is provided below the arc-shaped guide plate (4). The crushing block mechanism is driven to rotate by a motor compartment (54). The crushing block mechanism is connected to the liquid nitrogen conveying mechanism (2). Filter screen one (5) and filter screen two (51) are installed below the crushing block mechanism. A disc-shaped concave cavity feeding plate (9) is installed below the filter screen two (51). The bottom of the disc-shaped concave feeding plate (9) is connected to the rotating chamber (6). The rotating chamber (6) is provided with a pair of material channels (64). One end of the material channel (64) is connected to the conical air passage (63). The conical air passage (63) is connected to the interior of the processing chamber (301). The rotating chamber (6) is installed at the bottom of the inner cavity of the processing chamber (301). The rotating chamber (6) is equipped with a separation chamber (7). A circulation chamber (61) is formed between the outer wall of the separation chamber (7) and the inner wall of the rotating chamber (6). The upper and lower walls of the circulation chamber (61) are respectively provided with a negative pressure outlet (16) and a negative pressure inlet (161). Collection chambers (15) are provided on both sides of the circulation chamber (61). The collection chambers (15) are in contact with the side wall of the separation chamber (7) in a natural state. An adsorption plate (71) is installed on the side of the separation chamber (7) facing the circulation chamber (61) through the mounting groove (72). The separation chamber (7) is driven to rotate by a ring linear motor (14). When the separation chamber (7) is in the magnetic debris collection process, the separation chamber (7) rotates and faces the collection chamber (15). The top and walls of the collection chamber (15) are provided with top rods (151) to slide into the arc-shaped grooves (74) opened on the upper and lower walls of the adsorption plate (71). The top rods (151) drive the adsorption plate (71) to shift towards the inside of the collection chamber (15) and disconnect the electrical connection with the electromagnet controller (19). A connecting plate (10) is installed at the center of the processing chamber (301). A disc-shaped cavity feeding plate (9) is fixedly installed on the upper part of the connecting plate (10). A rotating chamber (6) is installed below the connecting plate (10). An arc-shaped guide port (641) is opened in the middle of the rotating chamber (6). An air pump (8) is installed in the middle of the arc-shaped guide port (641). The arc-shaped guide port (641) is connected to the channel (91) opened in the middle of the disc-shaped cavity feeding plate (9). The bottom two sides of the arc-shaped feed inlet (641) are connected to material channels (64), which extend outward and are connected to the conical air passage (63), and the jet output end of the air pump (8) is directed toward each material channel (64).

2. The polytetrafluoroethylene recycled powder production device according to claim 1, characterized in that, The crushing block mechanism includes a motor compartment (54), a crushing block (52), and a hollow shaft (13). The motor compartment (54) is fixedly installed in the middle of the disc-shaped concave feeding plate (9). A motor drive assembly (541) is provided inside the motor compartment (54). The output end of the motor drive assembly (541) is connected to the hollow shaft (13). The hollow shaft (13) extends out of the upper wall of the motor compartment (54) and is rotatably connected to the bottom wall of the arc-shaped guide plate (4). A multi-layer crushing unit group is installed in the middle of the hollow shaft (13). Each crushing unit group includes a connecting rod (55) and a crushing block (52). The crushing block (52) is installed on the hollow shaft (13) through the connecting rod (55). An air nozzle (521) is installed on the outer wall of the crushing block (52). The air nozzle (521) is connected to the liquid nitrogen conveying mechanism (2).

3. The polytetrafluoroethylene recycled powder production device according to claim 2, characterized in that, The liquid nitrogen delivery mechanism (2) is mounted on one side of the machine body (1). The output end of the liquid nitrogen delivery mechanism (2) is connected to a liquid nitrogen delivery pipe (201). The liquid nitrogen delivery pipe (201) passes through the machine body (1), the disc-shaped concave feed plate (9) and extends into the motor compartment (54). The liquid nitrogen delivery pipe (201) passes into the hollow shaft (13) and branches into multiple branches. Each branch extends into each connecting rod (55) and is connected to the jet nozzle (521). A rotary joint (202) is provided at the connection between the liquid nitrogen delivery pipe (201) and the motor compartment (54).

4. The polytetrafluoroethylene recycled powder production device according to claim 1, characterized in that, The upper part of the processing chamber (301) is provided with a feed inlet (3), and an arc-shaped guide plate (4) is provided directly below the feed inlet (3). The bottom side wall of the arc-shaped guide plate (4) is left with a gap between it and the interior of the processing chamber (301) to allow materials to pass through.

5. The polytetrafluoroethylene recycled powder production apparatus according to claim 1, characterized in that, The bottom of the body (1) is equipped with a drive motor (12). The output end of the drive motor (12) extends into the processing chamber (301) and is connected to the rotating chamber (6). There is a gap between the rotating chamber (6) and the inner wall of the processing chamber (301). Multiple crushing blocks (62) are installed on the outer wall of the rotating chamber (6). A cone-shaped air passage (63) is provided above the crushing blocks (62). The inner wall of the processing chamber (301) is equipped with a ring of arc-shaped convex wall (611), the arc-shaped wall of which is directly opposite the conical air passage (63), and the upper part of the arc-shaped convex wall (611) is provided with a vent hole (11), which is connected to the outside.

6. The polytetrafluoroethylene recycled powder production apparatus according to claim 1, characterized in that, A partition (73) is installed in the middle of the mounting groove (72). Limiting holes (731) are opened at the four corners of the partition (73) to connect with the guide rod (20). One end of the guide rod (20) extends into the separation chamber (7) and the other end is connected to the inner side of the adsorption plate (71). A spring (21) is installed between the inner wall of the adsorption plate (71) and the partition (73). The spring (21) is sleeved and installed on the outside of the guide rod (20). When the adsorption plate (71) is displaced, the spring (21) deforms.

7. The polytetrafluoroethylene recycled powder production apparatus according to claim 1, characterized in that, The bottom of the inner wall of the processing chamber (301) is provided with a discharge chamber (251). The discharge chamber (251) is annular, and an electric opening and closing plate (24) is installed on the upper side of the discharge chamber (251). One side of the discharge chamber (251) is connected to the material extraction pipe (25).

8. The polytetrafluoroethylene recycled powder production apparatus according to claim 1, characterized in that, A docking groove (152) is provided on one side of the collection chamber (15). A slot is provided in the middle of the upper and lower walls of the docking groove (152). A top rod (151) is installed in the slot. The top rod (151) and the arc-shaped groove (74) provided on the upper and lower walls of the adsorption plate (71) are docking mechanisms. An arc-shaped protrusion (741) is provided in the middle of the arc-shaped groove (74), and a limiting groove (742) is provided in the middle of the arc-shaped protrusion (741). The outer wall of the top rod (151) is pressed against a filling rubber block (26), and one end of the top rod (151) extends into the collection chamber (15) and is connected to the vibration motor (27).

9. A method for producing a recycled polytetrafluoroethylene powder using the production apparatus according to any one of claims 1-8, characterized in that, Includes the following steps: S1. The material enters the processing chamber and is subjected to rotary crushing by a high-speed rotating crushing block mechanism. At the same time, liquid nitrogen is added during the crushing process to quickly freeze the material, accelerate the material embrittlement, and improve the crushing efficiency. S2. After multi-stage crushing, the material falls naturally and enters the rotating chamber under negative pressure. High-speed airflow flows in the rotating chamber to quickly spray the material from the rotating chamber onto the inner wall of the processing chamber for impact. Under the rotating crushing operation in the rotating chamber, multiple crushing operations of impact and rotation are achieved. S3. The crushed material falls to the bottom of the processing chamber and is sucked into the rotating chamber under the negative pressure of the airflow. At this time, the separation chamber adsorbs the magnetic debris. S4. Unadsorbed material continues to participate in the circulating crushing process through the negative pressure flow port, and when the magnetic debris in the separation chamber reaches the collection threshold, the separation chamber automatically performs magnetic debris removal and collection operations.

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