Polytetrafluoroethylene regenerated powder production device and method

Abstract

The invention relates to the field of regenerated powder production, in particular to a polytetrafluoroethylene regenerated powder production device which is characterized in that a treatment cabin is arranged in the middle of a machine body, an arc-shaped guide plate is arranged at the upper part of an inner cavity of the treatment cabin, and a plurality of layers of crushing block mechanisms are arranged below the arc-shaped guide plate and are driven by a motor cabin to rotate; the smashing block mechanism is connected with the liquid nitrogen conveying mechanism, a first filter screen and a second filter screen are installed below the smashing block mechanism, and a dish-shaped concave cavity material guiding disc is installed below the second filter screen. Materials are frozen and embrittled through liquid nitrogen so as to improve the crushing efficiency, after multi-stage crushing, the materials enter the rotating cabin and are jetted by high-speed airflow to impact the cabin wall, multiple crushing is achieved in combination with rotating crushing, the materials fall to the cabin bottom and then are sucked into the rotating cabin again through negative pressure to be circularly treated, and a magnetic separation mechanism is arranged in the separation cabin so as to adsorb magnetic chippings; and when the magnetic chips are accumulated to a set threshold value, the separation cabin carries out magnetic chip removal operation, so that multiple crushing and rapid separation and collection operation on the magnetic chips are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of regenerated powder production, and particularly to a polytetrafluoroethylene regenerated powder production device and method. Background Art

[0002] Polytetrafluoroethylene is a commonly used plastic raw material. After the materials produced from polytetrafluoroethylene are discarded, the materials can be recycled and reused. After the materials are crushed and then mixed with fillers, polytetrafluoroethylene regenerated powder can be obtained. By recycling polytetrafluoroethylene powder, the cost of manufacturing plastic products can be reduced and the waste utilization rate can be improved.

[0003] When the existing devices perform regeneration treatment on polytetrafluoroethylene materials, most of them need to perform pre-crushing operations through crushing devices. However, traditional crushing devices mostly operate at room temperature and complete crushing through a single crushing roller. Since the polytetrafluoroethylene materials at room temperature have high toughness and cannot be effectively crushed, and there will still be some recoverable magnetic impurities remaining in the crushed materials, the traditional devices cannot effectively recover and process them, which will affect the properties of the regenerated plastic products. Therefore, there is an urgent need for a polytetrafluoroethylene regenerated powder production device. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to provide a polytetrafluoroethylene regenerated powder production device and method.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: A polytetrafluoroethylene regenerated 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 through a motor chamber. The crushing block mechanism is connected to a liquid nitrogen delivery mechanism. A first filter screen and a second filter screen are installed below the crushing block mechanism. A dish-shaped cavity material guiding plate is installed below the second filter screen; The bottom of the dish-shaped cavity material guiding plate is communicated with a rotating chamber. A pair of material channels are provided inside the rotating chamber. One end of the material channel is communicated with a conical air duct, and the conical air duct is communicated with the inside of the processing chamber; The rotating chamber is installed at the bottom of the inner cavity 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. A negative pressure discharge port and a negative pressure suction port are respectively opened on the upper and lower walls of the circulation chamber. And collection chambers are provided on both sides of the circulation chamber. The collection chambers are attached to the side wall of the separation chamber in the natural state. An adsorption plate is assembled on the side of the separation chamber facing the circulation chamber through an installation groove; The separation chamber is driven to rotate by a ring linear motor. When the separation chamber is in the process of magnetic debris collection operation, the separation chamber rotates and faces the collection chamber directly. The top and walls of the collection chamber are provided with ejector rods that slide and insert into the arc-shaped grooves opened on the upper and lower walls of the adsorption plate. The ejector rods drive the adsorption plate to shift towards the inner side of the collection chamber and disconnect the electrical connection with the electromagnet controller.

[0006] Preferably, the crushing block mechanism includes a motor chamber, crushing blocks, and a hollow shaft. The motor chamber is fixedly installed in the middle of the dish-shaped cavity material guiding plate. A motor driving assembly is arranged inside the motor chamber. The output end of the motor driving assembly is connected with a hollow shaft. The hollow shaft extends out of the upper wall of the motor chamber and is rotatably connected with 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 group of crushing units includes a connecting rod and a crushing block. The crushing block is installed on the hollow shaft through the connecting rod. A jet nozzle is installed on the outer wall of the crushing block, and the jet nozzle is connected with a liquid nitrogen delivery mechanism.

[0007] Preferably, the liquid nitrogen delivery mechanism is assembled on one side of the machine body. The output end of the liquid nitrogen delivery mechanism is connected with a liquid nitrogen delivery pipe. The liquid nitrogen delivery pipe passes through the machine body and the dish-shaped cavity material guiding plate and extends into the motor chamber. The liquid nitrogen delivery pipe penetrates into the hollow shaft and branches into multiple branch pipes. Each branch pipe correspondingly extends into each connecting rod and is connected with the jet nozzle.

[0008] A rotary joint is arranged at the connection part of the liquid nitrogen delivery pipe and the motor chamber.

[0009] Preferably, a feed inlet is arranged at the upper part of the treatment chamber. An arc-shaped guide plate is arranged directly below the feed inlet. A gap is left between the bottom side wall of the arc-shaped guide plate and the inside of the treatment chamber to pass materials.

[0010] Preferably, a connection disk is installed at the central position of the treatment chamber. A dish-shaped cavity material guiding plate is fixedly installed on the upper part of the connection disk. A rotary chamber is installed below the connection disk. An arc-shaped material guiding port is opened in the middle of the rotary chamber. An air pump is installed in the middle of the arc-shaped material guiding port. The arc-shaped material guiding port is communicated with a channel one opened in the middle of the dish-shaped cavity material guiding plate; Material channels are communicated and opened on both sides of the bottom of the arc-shaped material guiding port. The material channels extend outwards and are communicated with conical air ducts, and the jet output ends of the air pump correspondingly face each material channel.

[0011] Preferably, a driving motor one is installed at the inner bottom end of the machine body. The output end of the driving motor one extends into the treatment chamber and is connected with the rotary chamber. A gap is left between the rotary chamber and the inner wall of the treatment chamber. A plurality of crushing blocks are installed on the outer wall of the rotary chamber. A conical air duct is arranged above the crushing blocks; A circle of arc-shaped convex walls is installed on the inner wall of the treatment chamber. The arc-shaped wall of the arc-shaped convex wall faces the conical air duct directly, and ventilation holes are opened in the upper part of the arc-shaped convex wall and are communicated with the outside.

[0012] Preferably, a partition is installed in the middle of the installation groove. Limiting holes are opened at the four corners of the partition to dock with the guide rods. 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 outside the guide rod, and when the adsorption plate is displaced, the spring deforms.

[0013] Preferably, a discharge chamber is opened at the bottom of the inner wall of the treatment chamber. The discharge chamber is annular, and an electric opening and closing plate II is installed on one side of the upper part of the discharge chamber. One side of the discharge chamber is communicated with the material extraction pipe.

[0014] Preferably, a docking groove is opened on one side of the collection chamber. Notches are opened in the middle of the upper and lower walls of the docking groove. A top rod is installed in the notches. The top rod and the arc grooves opened on the upper and lower walls of the adsorption plate are a docking mechanism. An arc-shaped convex block is provided in the middle of the arc groove, and a limiting groove is opened in the middle of the arc-shaped convex block; A filling rubber block is extruded and contacted with the outer wall of the middle part of the top rod, and one end of the top rod extends into the collection chamber and is connected to the vibration motor.

[0015] A method for a polytetrafluoroethylene recycled powder production device includes the following steps: S1. Materials enter the treatment chamber and are subjected to rotary crushing treatment by a high-speed rotating crushing block mechanism. At the same time, liquid nitrogen is added during the crushing process to quickly freeze the materials, accelerate the embrittlement of the materials, and improve the crushing efficiency; S2. After being crushed in multiple stages, the materials enter the rotary chamber through natural falling and air flow negative pressure. A high-speed air flow circulates in the rotary chamber to quickly spray the materials from the rotary chamber onto the inner wall of the treatment chamber for impact. Under the rotary crushing operation of the rotary chamber, impact and rotary multiple crushing operations are realized; S3. The crushed materials fall to the bottom of the treatment chamber and are sucked into the rotary chamber under the action of air flow negative pressure. At this time, the separation chamber adsorbs magnetic debris; S4. The unadsorbed materials continue to participate in the cyclic crushing process through the negative pressure flow port. When the magnetic debris in the separation chamber reaches the collection threshold, the separation chamber automatically performs the magnetic debris cleaning and collection operation.

[0016] The beneficial effects of the present invention are as follows: In the present invention, the materials are frozen and embrittled by liquid nitrogen in the treatment chamber to improve the crushing efficiency. After being crushed in multiple stages, the materials enter the rotary chamber through negative pressure air flow and are sprayed and impacted on the chamber wall by high-speed air flow. Combining rotary crushing to achieve multiple crushing. After the crushed products fall to the bottom of the chamber, they are re-sucked into the rotary chamber by the negative pressure system for cyclic treatment. The separation chamber is internally provided with a magnetic separation mechanism to adsorb magnetic debris. When the magnetic debris accumulates to the set threshold, the separation chamber automatically performs the magnetic debris cleaning operation, realizing multiple crushing and rapid sorting and collection operations of magnetic debris, significantly improving the crushing efficiency, and ensuring the crushing quality. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the external structure of a polytetrafluoroethylene regenerated powder production device proposed by the present invention; Figure 2 It is a cross-sectional view of the internal structure of a polytetrafluoroethylene regenerated powder production device proposed by the present invention; Figure 3 It is a schematic diagram of the installation structure of the crushing block mechanism proposed by the present invention; Figure 4 It is an exploded view of the crushing block mechanism proposed by the present invention; Figure 5 It is a schematic diagram of the installation position structure of the second filter proposed by the present invention; Figure 6 It is a schematic diagram of the connection structure of the liquid nitrogen delivery pipe proposed by the present invention; Figure 7 It is an exploded view of the installation structure of the rotating cabin proposed by the present invention; Figure 8 It is a cross-sectional view of the material channel structure proposed by the present invention; Figure 9 It is a cross-sectional view of the internal structure of the rotating cabin proposed by the present invention; Figure 10 It is a schematic diagram of the installation structure of the separation cabin proposed by the present invention; Figure 11 It is a schematic diagram of the installation structure of the adsorption plate proposed by the present invention; Figure 12 It is a schematic diagram of the installation structure of the installation groove proposed by the present invention; Figure 13 It is a schematic diagram of the positional relationship structure between the separation cabin and the collection chamber proposed by the present invention; Figure 14 It is a schematic diagram of the collection chamber proposed by the present invention; Figure 15 It is a schematic diagram of the internal cross-section of the collection chamber proposed by the present invention; Figure 16 It is a schematic diagram of the external structure of the adsorption plate proposed by the present invention; Figure 17 It is a schematic diagram of the structure at position A proposed by the present invention; Figure 18 It is a schematic diagram of the conductive end structure proposed by the present invention; Figure 19 It is a schematic diagram of the connection structure between the adsorption plate and the docking groove proposed by the present invention; Figure 20 It is a schematic diagram of the connection structure of the ejector rod proposed by the present invention.

[0018] In the figure: 1, the body; 2, the liquid nitrogen delivery mechanism; 201, the liquid nitrogen delivery pipe; 202, the rotary joint; 3, the feed inlet; 301, the treatment chamber; 4, the arc-shaped guide plate; 5, the first filter screen; 51, the second filter screen; 52, the crushing block; 521, the air nozzle; 53, the connecting ring; 54, the motor chamber; 541, the motor drive assembly; 55, the connecting rod; 6, the rotating chamber; 61, the circulation chamber; 611, the arc-shaped convex wall; 62, the grinding block; 63, the conical air duct; 64, the material channel; 641, the arc-shaped material guiding port; 7, the separation chamber; 71, the adsorption plate; 711, the rubber convex strip; 72, the mounting groove; 73, the partition plate; 731, the limiting hole; 74, the arc-shaped groove; 741, the arc-shaped convex block; 742, the limiting groove; 8, the air pump; 9, the dish-shaped concave cavity material guiding plate; 91, the first channel; 10, the connecting plate; 11, the ventilation hole; 12, the first driving motor; 13, the hollow shaft; 14, the annular linear motor; 15, the collection chamber; 151, the ejector rod; 152, the docking groove; 16, the negative pressure discharge port; 161, the negative pressure suction port; 17, the stirring rod; 18, the conductive end; 19, the electromagnet controller; 191, the conductive insertion cylinder; 1911, the copper contact; 20, the guide rod; 21, the spring; 22, the micro switch; 23, the first electric opening and closing plate; 24, the second electric opening and closing plate; 25, the material extraction pipe; 251, the discharge chamber; 26, the filling rubber block; 27, the vibration motor. Detailed implementation mode

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Refer to Figures 1-6 , a polytetrafluoroethylene regenerated powder production device, including a body 1, a feed inlet 3 is arranged at the upper part of the body 1 to introduce materials, and the materials enter the treatment chamber 301 arranged inside the body 1 through the feed inlet 3; A dish-shaped concave cavity material guiding plate 9 is installed in the middle of the treatment chamber 301, a motor chamber 54 is fixedly installed in the middle of the dish-shaped concave cavity material guiding plate 9, and the motor chamber 54 drives a multi-layer crushing block mechanism to rotate through a hollow shaft 13. Each crushing block mechanism includes a plurality of crushing blocks 52, and a certain gap is left between the outer wall of each crushing block 52 and the inner wall of the treatment chamber 301 to crush the materials.

[0021] An arc-shaped guide plate 4 is arranged above the uppermost layer of the crushing block mechanism. The arc-shaped guide plate 4 is arranged directly below the feed inlet 3. After the materials enter the treatment chamber 301 through the feed inlet 3, they contact the surface of the arc-shaped guide plate 4 and are 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 treatment chamber 301 to pass the materials.

[0022] A first filter screen 5 is arranged below the uppermost crushing block mechanism, and a second filter screen 51 is arranged below the lowermost crushing block mechanism. The filtering aperture of the first filter screen 5 is larger than that of the second filter screen 51. A dish-shaped cavity material guiding tray 9 is installed below the second filter screen 51, and a plurality of first channels 91 are arranged in the middle of the dish-shaped cavity material guiding tray 9 to pass materials.

[0023] The bottom end of the dish-shaped cavity material guiding tray 9 is connected to a connecting disk 10. The connecting disk 10 is fixedly installed in the middle of the processing chamber 301. A circular channel is opened in the middle of the connecting disk 10 to communicate with the plurality of first channels 91. Materials enter the circular channel opened inside the connecting disk 10 through the plurality of first channels 91.

[0024] The middle part of the dish-shaped cavity material guiding tray 9 is set as a cavity structure to improve the material flow efficiency, and the cavity communicates with the first channels 91.

[0025] A rotating chamber 6 is installed below the connecting disk 10. The rotating chamber 6 is driven to rotate by a first driving motor 12. A separation chamber 7 is installed in the middle of the rotating chamber 6.

[0026] A first driving motor 12 is installed inside the machine body 1. The output end of the first driving motor 12 extends into the processing chamber 301 and is drivingly connected to the rotating chamber 6.

[0027] Furthermore, the outer side of the arc-shaped guide plate 4 is fixedly connected to the processing chamber 301 through a bracket. The outer sides of the first filter screen 5 and the second filter screen 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 the first filter screen 5, and between the first filter screen 5 and the second filter screen 51.

[0028] Multiple groups of crushing blocks 52 arranged in the crushing block mechanism are all connected to a hollow shaft 13 through connecting rods 55. The hollow shaft 13 is drivingly connected to the output end of a motor driving assembly 541 arranged inside the motor chamber 54. The motor driving assembly 541 includes a driving mechanism composed of a motor and a bevel gear set. The output end of the motor driving assembly 541 is connected to the hollow shaft 13. The hollow shaft 13 extends out of the top of the motor chamber 54 and is rotatably connected to the bottom wall of the arc-shaped guide plate 4.

[0029] In addition, a liquid nitrogen delivery mechanism 2 is arranged 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 extends into the dish-shaped cavity material guiding tray 9 and is extended and installed into the motor chamber 54. The liquid nitrogen delivery pipe 201 penetrates into the inside of the hollow shaft 13 and is provided with a plurality of branch pipes. Each branch pipe is installed into a connecting rod 55. One end of each connecting rod 55 is connected to a crushing block 52. A jet nozzle 521 is arranged in the middle of the crushing block 52. The jet nozzle 521 is connected to the corresponding branch pipe.

[0030] Among them, a rotary joint 202 is arranged at the connection between the motor chamber 54 and the liquid nitrogen delivery pipe 201.

[0031] In addition, the outer walls of each crushing block 52 are provided with concave and convex patterns, which improve the friction crushing efficiency, and each crushing block 52 is connected into a whole through a connecting ring 53.

[0032] Refer to Figures 7-13 , a driving motor 12 is installed on the inner bottom side of the machine body 1, the output end of the driving motor 12 extends into the inside of the processing chamber 301 and is drivingly connected to the rotating chamber 6, an arc-shaped material guiding port 641 is opened in the middle of the upper end of the rotating chamber 6, and material channels 64 are communicated on both sides of the arc-shaped material guiding port 641. One end of the material channel 64 extends outward and is communicated with the conical air duct 63. The wide opening of the conical air duct 63 faces the material channel 64, and the narrow opening extends outward and penetrates through the outer wall of the rotating chamber 6 and is communicated with the inside of the processing chamber 301.

[0033] 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 seat. The two output ports of the air pump 8 respectively face each material channel 64.

[0034] A plurality of grinding blocks 62 are symmetrically arranged on the outer wall of the rotating chamber 6. The grinding blocks 62 are spaced from the inner wall of the processing chamber 301 to grind materials. A conical air duct 63 is arranged above the grinding blocks 62.

[0035] An arc-shaped convex wall 611 is arranged in the middle of the inner wall of the processing chamber 301. The arc-shaped inclined surface of the arc-shaped convex wall 611 faces the conical air duct 63, and there is a certain distance between the arc-shaped convex wall 611 and the conical air duct 63. Horizontal ventilation holes 11 are opened in the non-inclined section of the upper part of the arc-shaped convex wall 611 for exhausting air. The ventilation holes 11 are communicated with the inside of the machine body 1 and are discharged to the outside through the air pipe arranged inside the machine body 1.

[0036] A notch is opened at the inner bottom end of the rotating chamber 6 to install 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 arranged inside the rotating chamber 6. Circulation chambers 61 are respectively arranged on both sides of the collection chamber 15.

[0037] Among them, the assembly gap between the separation chamber 7 and the rotating chamber 6 forms the circulation chamber 61.

[0038] A negative pressure suction port 161 is opened on the bottom wall of the circulation chamber 61. The negative pressure suction port 161 is communicated with the inside of the processing chamber 301; A negative pressure discharge port 16 is opened on the top wall of the circulation chamber 61. The negative pressure discharge port 16 is communicated with the material channel 64.

[0039] Further, an installation groove 72 is formed on one side of the outer wall of the separation chamber 7 facing the circulation chamber 61. A partition plate 73 is arranged in the middle of the installation groove 72, and an adsorption plate 71 is arranged on the side away from the partition plate 73. The adsorption plate 71 slightly protrudes from the outer wall of the separation chamber 7. Guide rods 20 are arranged at the four inner corners of the separation chamber 7. The guide rods 20 pass through the partition plate 73 and extend into the installation groove 72. The adsorption plate 71 realizes linear movement through the guide rods 20.

[0040] A plurality of springs 21 are connected between the adsorption plate 71 and the partition plate 73. The springs 21 are sleeved on each guide rod 20 in a limiting manner, and when the adsorption plate 71 is displaced, the springs 21 are deformed.

[0041] A microswitch 22 is arranged on the side away from the guide rod 20. The microswitch 22 is assembled inside the separation chamber 7. In the natural state, a pre-triggering distance is left between the triggering end of the microswitch 22 and the guide rod 20.

[0042] Guide rods 20 are installed at the four inner corners of the inner side of the adsorption plate 71, and the guide rods 20 are installed in the limiting holes 731 formed at the four corners of the partition plate 73 in a limiting manner.

[0043] Further, a discharge chamber 251 is formed at the bottom of the inner wall of the treatment chamber 301. The discharge chamber 251 is annular, and an electric opening and closing plate two 24 is installed on one side of the upper part of the discharge chamber 251. One side of the discharge chamber 251 is communicated with the material extraction pipe 25. The electric opening and closing plate two 24 is in a closed state in the natural state.

[0044] Refer to 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 towards the separation chamber 7 and is docked with the conductive socket 191. The conductive socket 191 is installed in the middle of the installation groove 72, and the conductive socket 191 is electrically connected to the output end of the electromagnet controller 19. A plurality of copper contacts 1911 are arranged on the inner wall of the conductive socket 191, and the conductive end 18 is allowed to linearly move a certain distance in the conductive socket 191.

[0045] The electromagnet controller 19 activates the adsorption plate 71 to be charged to generate electromagnetic suction force.

[0046] The conductive end 18 is connected to the adsorption plate 71 through a wire.

[0047] Refer to Figure 11 、 Figure 13 Rubber convex strips 711 are arranged on both sides of the adsorption plate 71. The rubber convex strips 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.

[0048] Refer to Figures 13-17 ,Figures 19-20 On one side of the middle part of the collection chamber 15, a docking groove 152 is provided. The docking groove 152 is used to dock the adsorption plate 71. At the middle parts of the top and bottom walls of the docking groove 152, ejector rods 151 are installed. One end of the ejector rod 151 is connected to the vibration motor 27. The vibration motor 27 operates to drive the ejector rod 151 to vibrate. And a filling rubber block 26 is wrapped around the outside of the ejector rod 151. The filling rubber block 26 allows the ejector rod 151 to perform a certain irregular vibration displacement.

[0049] Among them, a space for storing magnetic debris is arranged inside the collection chamber 15. 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 internally communicated with the processing chamber 301.

[0050] Furthermore, arc-shaped grooves 74 are provided on both the upper and lower walls of the adsorption plate 71. The arc-shaped grooves 74 and the ejector rods 151 are mutually sliding docking mechanisms. When the separation chamber 7 rotates and displaces towards the collection chamber 15, one side of the arc-shaped groove 74 is docked with the ejector rod 151.

[0051] An arc-shaped convex block 741 is arranged in the middle of the arc-shaped groove 74. When the arc-shaped convex block 741 contacts the ejector rod 151, the adsorption plate 71 is displaced towards the inner side of the collection chamber 15 due to the reverse extrusion of the ejector rod 151. A limit groove 742 is provided in the middle of the arc-shaped convex block 741. When the separation chamber 7 rotates and displaces to the end of its stroke, the ejector rod 151 is clamped with the limit groove 742.

[0052] When the adsorption plate 71 is displaced, the conductive end 18 is limited to move within the conductive socket 191.

[0053] In this embodiment, the preliminarily pulverized polytetrafluoroethylene material enters the processing chamber 301 arranged inside the machine body 1 through the feed port 3, and the arc-shaped guide plate 4 disperses and guides the material to the bottom, enabling it to enter the pulverizing block mechanism. At the same time, the liquid nitrogen delivery mechanism 2 delivers liquid nitrogen to the pulverizing block mechanism through the liquid nitrogen delivery pipe 201. At this time, the material drops into the working area of the first-layer pulverizing block mechanism. The pulverizing block 52 is driven by the motor chamber 54 to rotate at a high speed. During the rotation, liquid nitrogen is ejected through the air jet nozzle 521, reducing the temperature of the overall pulverizing area and quickly freezing the falling material. At this time, all the materials inside the material, including the polytetrafluoroethylene raw material and other impurities, are quickly frozen.

[0054] After being rotationally crushed by the crushing block 52 to the corresponding particle size, the material passes through the first filter screen 5. At this time, the material enters the working area of the crushing block mechanism in the second layer, and continues to be quickly rotated and ground after being frozen. When the material is ground to the corresponding particle size to pass through the second filter screen 51, the material drops into the dish-shaped cavity material guiding tray 9 arranged below the second filter screen 51. A plurality of first channels 91 are provided in the middle of the dish-shaped cavity material guiding tray 9, so that the frozen and crushed material enters the rotating chamber 6 through the cavity and is arranged in the first channels 91.

[0055] The arc-shaped material guiding port 641 provided in the middle of the rotating chamber 6 guides the falling material, and guides the material to the material channels 64 on both sides. At this time, the air pump 8 continuously sprays high-speed gas into the material channels 64. Under the action of natural flow and air flow negative pressure, the air flow drives the material to pass through the arc-shaped material guiding port 641 and continuously enter the material channels 64. The material channels 64 are connected to the conical air duct 63. The conical air duct 63 allows the gas to drive the material to be discharged outside the rotating chamber 6 together, and impacts on 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 is arranged, so that the air flow drives the material to flow downward preferentially, and allows part of the air flow to pass through the gap between the arc-shaped convex wall 611 and the rotating chamber 6, and then is discharged to the outside through the ventilation holes 11.

[0056] Synchronously, the driving motor 1 drives the rotating chamber 6 to rotate at a constant speed, and crushes the downward flowing material through the crushing block 62. The material after being crushed finally falls on the inner bottom wall of the processing chamber 301. Since the rotating chamber 6 is constantly rotating, the stirring rod 17 arranged at the bottom of the rotating chamber 6 stirs the material to increase its fluidity. And as the air pump 8 continuously sprays high-speed gas, the negative pressure generated by the high-speed air flow causes the material falling to the bottom to be adsorbed into the circulation chamber 61 through the negative pressure suction port 161 opened at the bottom of the rotating chamber 6. At this time, the adsorption plate 71 arranged on one side of the circulation chamber 61 adsorbs impurities. Due to the material characteristics of polytetrafluoroethylene, it will not be adsorbed by the adsorption plate 71, so that the polytetrafluoroethylene raw material and impurities are separated in this area.

[0057] Then, the unadsorbed material is discharged through the negative pressure discharge port 16 and continuously introduced into the material channels 64 to circulate the operations of crushing and sucking again.

[0058] As the material on the adsorption plate 71 gradually increases, the generated acting force increases, causing the adsorption plate 71 to displace towards the separation chamber 7 body side. At this time, the spring 21 is compressed, the guiding rod 20 moves towards the microswitch 22 side, and the conductive end 18 in the middle naturally slides in the conductive socket 191.

[0059] Among them, when the guide rod 20 contacts the microswitch 22, the microswitch 22 activates the operation of the annular linear motor 14 by the control module, and the air pump 8 and the first driving motor 12 stop operating, and the magnetic debris collection operation process is carried out. The annular linear motor 14 drives the separation chamber 7 to rotate, so that the rubber ridges 711 on both sides of the adsorption plate 71 are extruded against the outer wall of the collection chamber 15 to deform, and with continuous rotation, the rubber ridges 711 are finally compressed and the adsorption plate 71 enters the collection chamber 15.

[0060] Then, the ejector rod 151 provided on the collection chamber 15 will be docked with the arc grooves 74 provided on the top and bottom walls of the adsorption plate 71. After traveling to the designated position, the raised arc-shaped protrusion 741 provided in the middle of the arc groove 74 contacts the ejector rod 151 relatively. And because the adsorption plate 71 is movable, under relative extrusion, the adsorption plate 71 is displaced toward the inside of the collection chamber 15.

[0061] Synchronously, when the adsorption plate 71 is displaced outward, the conductive end 18 is separated from the conductive socket 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 suction. At this time, the magnetic debris adsorbed on the adsorption plate 71 gradually falls into the collection chamber 15.

[0062] At the same time, the ejector rod 151 vibrates due to the operation of the vibration motor 27 and vibrates the middle part of the adsorption plate 71 to improve the debris dropping efficiency.

[0063] Among them, in the actual application process, after the magnetic debris collection operation process is completed, the separation chamber 7 is reset, and according to the actual processing requirements, the electric opening and closing plate two 24 is controlled to open, so that the non-magnetic debris-containing material falling into the processing chamber 301 drops into the discharge chamber 251, and is extracted by an external material extraction mechanism in cooperation with the material extraction pipe 25.

[0064] The collection chamber 15 collects and stores the magnetic debris. After multiple operations, the electric opening and closing plate one 23 is controlled to open to discharge the magnetic debris into the processing chamber 301, and the electric opening and closing plate two 24 is controlled to open, so that the magnetic debris falls into the discharge chamber 251, and is extracted by an external material extraction mechanism in cooperation with the material extraction pipe 25.

[0065] Among them, in the actual application process, the microswitch 22 is connected to the control module. After being triggered by a push, the microswitch 22 activates the operation of the annular linear motor 14 by the control module.

[0066] In the natural state, the rubber ridges 711 block the edge of the collection chamber 15 to ensure the sealing of the circulation cavity 61 and can ensure the stability of the separation chamber 7 in the stationary state.

[0067] The stirring rod 17 stirs the material that falls to the bottom to improve fluidity for easy absorption.

[0068] In the actual application process, the multiple copper contacts 1911 are set to ensure the current flow even when the conductive end 18 is displaced a small distance.

[0069] Furthermore, in the present device, the material enters the processing chamber 301 and is subjected to rotational 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 embrittlement of the material, and improve the crushing efficiency. After multi-stage crushing, the material enters the rotating chamber 6 through natural falling and negative air pressure. A high-speed airflow flows in the rotating chamber 6 to quickly spray the material from the rotating chamber 6 to the inner wall of the processing chamber 301 for impact. Under the rotational crushing operation of the rotating chamber 6, multiple crushing operations of impact and rotation are realized. The crushed material falls to the bottom of the processing chamber 301 and is sucked into the rotating chamber 6 under the action of the negative pressure of the airflow. At this time, the separation chamber 7 adsorbs the magnetic debris, and the material that is not adsorbed 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, and the separation chamber 7 automatically performs the magnetic debris removal and collection operation.

[0070] Among them, it is worth noting that the rotary joint 202 is specifically a closed rotary connector, which allows the connected pipes to rotate relatively and transmit the medium at the same time through the internal precision sealing structure. It is a conventional configuration in this field. The rotary joint 202 ensures that the liquid nitrogen delivery pipe 201 is not disturbed by the rotation of the branch pipe.

[0071] Among them, it is worth noting that the motor drive assembly 541, 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 to achieve the operation of driving the hollow shaft 13 to rotate. This belongs to the conventional mechanical transmission configuration in this field and will not be explained.

[0072] Among them, it is worth noting that the stator end (base) of the annular linear motor 14 is installed inside the rotating cabin 6, and the mover end is connected to the separation cabin 7. In the natural state, the separation cabin 7 is naturally locked in the circulation cavity 61 by the rubber convex strip 711, and the separation cabin 7 rotates as the rotating cabin 6 rotates.

[0073] It is worth noting that the electromagnet controller 19 specifically excites the adsorption plate 71 to be charged to generate electromagnetic attraction through the conductive plug 191 and the conductive terminal 18, and the adsorption plate 71 is specifically an electromagnetic adsorption plate.

[0074] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A polytetrafluoroethylene recycled powder production device, comprising a body (1), characterized in that: A processing chamber (301) is provided in the middle of the machine body (1), an arc-shaped guide plate (4) is provided at the upper part of the inner cavity of the processing chamber (301), a multi-layer crushing block mechanism is provided below the arc-shaped guide plate (4), the crushing block mechanism is driven to rotate by the motor chamber (54), the crushing block mechanism is connected to the liquid nitrogen conveying mechanism (2), a filter screen 1 (5) and a filter screen 2 (51) are installed below the crushing block mechanism, and a dish-shaped concave cavity guide plate (9) is installed below the filter screen 2 (51); The bottom of the disc-shaped concave cavity material guide plate (9) is in communication with the rotating chamber (6), a pair of material channels (64) are provided inside the rotating chamber (6), one end of the material channel (64) is in communication with the conical air channel (63), and the conical air channel (63) is in communication with 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), a separation chamber (7) is installed inside the rotating chamber (6), 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 discharge port (16) and a negative pressure suction port (161), and collection chambers (15) are provided on both sides of the circulation chamber (61), the collection chambers (15) are in a natural state in contact with the side walls of the separation chamber (7), and an adsorption plate (71) is installed on the side of the separation chamber (7) facing the circulation chamber (61) through a mounting groove (72); The separation cabin (7) is driven to rotate by an annular linear motor (14). When the separation cabin (7) is in the magnetic debris collection operation process, the separation cabin (7) rotates and faces the collection chamber (15). The top and wall of the collection chamber (15) are provided with a push rod (151) to slide into the arc groove (74) provided on the upper and lower walls of the adsorption plate (71). The push rod (151) drives the adsorption plate (71) to deflect toward the inside of the collection chamber (15) and disconnects the electrical connection with the electromagnet controller (19).

2. The polytetrafluoroethylene recycled powder production device according to claim 1, characterized in that: The crushing block mechanism comprises a motor cabin (54), a crushing block (52), and a hollow shaft (13). The motor cabin (54) is fixedly mounted in the middle of the dish-shaped concave cavity feed guide plate (9). A motor drive assembly (541) is arranged in the motor cabin (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 cabin (54) and is rotatably connected to the bottom wall of the arc-shaped guide plate (4). A multi-layer crushing unit group is mounted in the middle of the hollow shaft (13). Each crushing unit group comprises a connecting rod (55) and a crushing block (52). The crushing block (52) is mounted on the hollow shaft (13) via the connecting rod (55). An air nozzle (521) is mounted 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 cavity feed tray (9) and extends to the inside of the motor cabin (54); the liquid nitrogen delivery pipe (201) passes into the inside of the hollow shaft (13) and branches into a plurality of branch pipes; each branch pipe extends into each connecting rod (55) and is connected to the air jet nozzle (521); A rotary joint (202) is provided at the connection between the liquid nitrogen delivery pipe (201) and the motor cabin (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 port (3), and a curved guide plate (4) is provided directly below the feed port (3). A gap is left between the bottom side wall of the curved guide plate (4) and the interior of the processing chamber (301) to allow materials to pass through.

5. The polytetrafluoroethylene recycled powder production device according to claim 1, characterized in that: A connecting plate (10) is installed at the center of the processing chamber (301), a disc-shaped concave cavity material guide 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 material 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 material guide port (641), and the arc-shaped material guide port (641) is connected to a channel 1 (91) opened in the middle of the disc-shaped concave cavity material guide plate (9); Material channels (64) are connected to both sides of the bottom of the arc-shaped material guide port (641). The material channels (64) extend outward and are connected to the conical air channel (63), and the jet output end of the air pump (8) is directed toward each material channel (64).

6. The polytetrafluoroethylene recycled powder production device according to claim 1, characterized in that: A driving motor 1 (12) is installed at the bottom end of the body (1), the output end of the driving motor 1 (12) extends into the processing chamber (301) and is connected to the rotating chamber (6), a gap is left between the rotating chamber (6) and the inner wall of the processing chamber (301), a plurality of crushing blocks (62) are installed on the outer wall of the rotating chamber (6), and a conical airway (63) is provided above the crushing blocks (62); The inner wall of the processing chamber (301) is provided with a circle of arc-shaped convex walls (611), the arc-shaped convex walls (611) are directly opposite to the conical airway (63), and a vent hole (11) is provided at the upper part of the arc-shaped convex wall (611), the vent hole (11) being in communication with the outside.

7. The polytetrafluoroethylene recycled powder production device according to claim 1, characterized in that: A partition (73) is installed in the middle of the installation groove (72), and limiting holes (731) are provided at four corners of the partition (73) to connect with the guide rod (20). One end of the guide rod (20) extends into the interior of the separation cabin (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), and when the adsorption plate (71) is displaced, the spring (21) is deformed.

8. The polytetrafluoroethylene recycled powder production device according to claim 1, characterized in that: 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 2 (24) is installed on one side of the upper part of the discharge chamber (251). One side of the discharge chamber (251) is connected to the material extraction pipe (25).

9. The polytetrafluoroethylene recycled powder production device according to claim 1, characterized in that: A docking groove (152) is provided on one side of the collection chamber (15), and notches are provided in the middle of the upper and lower walls of the docking groove (152), and a push rod (151) is installed in the notch. The push rod (151) and the arc-shaped groove (74) provided on the upper and lower walls of the adsorption plate (71) form a docking mechanism, and 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 middle outer wall of the push rod (151) is in compression contact with a filling rubber block (26), and one end of the push rod (151) extends into the interior of the collection chamber (15) and is connected to the vibration motor (27).

10. A method for producing polytetrafluoroethylene recycled powder, characterized in that: The following steps are involved: S1. The material enters the processing chamber according to any one of claims 1 to 9 and is subjected to rotational 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 embrittlement of the material, and improve the crushing efficiency; S2. After multi-stage crushing, the material falls naturally and enters the rotating chamber under negative air pressure. A high-speed airflow flows in the rotating chamber to quickly spray the material from the rotating chamber to the inner wall of the processing chamber for impact. Under the rotating crushing operation of the rotating chamber, multiple impact and rotation crushing operations are realized; 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 absorbs the magnetic debris; S4. The materials that are not adsorbed continue to participate in the cyclic crushing process through the negative pressure flow port, and when the magnetic debris in the separation cabin reaches the collection threshold, the separation cabin automatically performs the magnetic debris removal and collection operation.

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