Precise conveying and metering device for polytetrafluoroethylene particles

Abstract

The invention discloses a precise conveying and metering device for polytetrafluoroethylene particles, and relates to the technical field of particle conveying, the precise conveying and metering device comprises a material storing and feeding device, a driving device is arranged above the right side of the material storing and feeding device, the driving device comprises a CVT gearbox and a fixed seat, the CVT gearbox is arranged above the fixed seat, and the CVT gearbox is arranged above the fixed seat. A servo motor is arranged above the CVT gearbox, an input shaft of the CVT gearbox is connected with an output shaft of the servo motor through a coupler, a gear transmission mechanism is arranged below the fixing base and located above the top fixing plate, the CVT gearbox is provided with a variable-speed output shaft, and an angle sensor is arranged on the variable-speed output shaft. The servo motor serves as a power source, the gear transmission mechanism drives the spiral conveying mechanism to rotate, polytetrafluoroethylene particles can be conveniently fed to a follow-up device, the angle sensor monitors the rotating direction of the speed change output shaft, and the polytetrafluoroethylene particles can be conveniently and sequentially discharged outside in the follow-up process.

Description

Technical Field

[0001] This invention relates to the field of particle conveying technology, specifically a device for precise conveying and metering of polytetrafluoroethylene particles. Background Technology

[0002] Precision particle conveying and metering technology is widely used in various fields such as chemical, pharmaceutical, food, and environmental protection. Its main purpose is to ensure the precise delivery and proper proportioning of granular materials during the production process, achieving efficient production and quality control. This technology typically relies on advanced conveying and metering equipment, such as vibrating feeders, screw conveyors, and pneumatic conveying systems. Through these devices, granular materials can be conveyed to designated locations at a predetermined speed and with precise weight or volume, avoiding waste or uneven distribution.

[0003] The invention disclosed in the authorization announcement number CN113860004B is an environmentally friendly dust-reducing refractory granular material metering and conveying device. The invention uses a related mechanism in the ejector vibrating feeding device to make the granular material accumulated at the bottom of the feed hopper bounce upward, loosening the tightly squeezed granular material, avoiding material compression and blockage, and ensuring smooth feeding. Multiple screens screen the granules to facilitate obtaining granules of the specified size.

[0004] The above-mentioned device can achieve the purpose of screening particles by size and preventing blockage. However, the anti-blockage in this device is achieved by extrusion, which still makes it easy for multiple particles to agglomerate due to static electricity, which is not conducive to improving screening efficiency. In addition, the device requires multiple power sources, has a relatively complex structure, and lacks a counting and metering device, so it cannot count and measure the particles. Therefore, a conveying device that can count and measure particles and prevent blockage is needed. Summary of the Invention

[0005] The purpose of this invention is to provide a device for precise conveying and metering of polytetrafluoroethylene particles, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A precision conveying and metering device for polytetrafluoroethylene (PTFE) particles includes a storage and feeding device. A driving device is arranged on the upper right side of the storage and feeding device, and a graded screening and feeding device is arranged below the driving device. A first counting device and a second counting device are respectively arranged on the right side of the graded screening and feeding device. A first metering device is arranged below the first counting device, and a second metering device is arranged below the second counting device. The first counting device and the second counting device have the same structure, and the first metering device and the second metering device have the same structure.

[0008] The graded screening and feeding device includes a second housing. The bottom inner side of the second housing has a guide section. A slide rail is provided on the left side of the second housing. A limiting support section is provided on the top of the second housing. A vertical rotating shaft is rotatably mounted on the top and bottom of the limiting support section via a first sealed bearing and a second sealed bearing, respectively. The upper end of the vertical rotating shaft has a keyed connection section that is keyed to a speed-changing output shaft. A first screen and a second screen are fixedly mounted on the bottom of the vertical rotating shaft. A locking mechanism that cooperates with the first and second screens is provided on the front side of the second housing. A first discharge hopper and a second discharge hopper that cooperate with the first and second screens are provided on the right side of the second housing, respectively. The first discharge hopper is connected to the first counting device via the second discharge pipe, which is equipped with a first high-pressure spray nozzle. The second discharge hopper is connected to the second counting device via the third discharge pipe, which is equipped with a second high-pressure spray nozzle. An automatic lifting device is installed between the first and second discharge hoppers. A dust collector is installed on the rear bottom side of the second housing, which is connected to the dust collector via a dust collector pipe, which is equipped with a first solenoid valve. A collection box is installed below the second housing, which is connected to the second housing via a collection pipe, which is equipped with a second solenoid valve. Vibration motors are installed opposite each other on both sides of the collection pipe on the lower end face of the second housing.

[0009] As a further embodiment of the present invention: a deflection lifting part is fixedly provided below the key connection part on the vertical rotation axis, a base is fixedly provided on one side of the top fixing plate, and ball bearings that cooperate with the deflection lifting part are arranged opposite to each other on the base.

[0010] As a further embodiment of the present invention: an ion wind bar is provided on one side of the limiting support portion.

[0011] As a further embodiment of the present invention: the first screen and the second screen are inclined, and a plurality of cleaning balls are disposed between the first screen and the second screen.

[0012] As a further embodiment of the present invention: the diameters of the second and third discharge pipes are matched with the mesh sizes of the first and second screens.

[0013] As a further embodiment of the present invention: the material storage and feeding device includes a first housing, the bottom of the inner side of the first housing has a material guiding slope, a spiral conveying shell is provided inside the first housing, a spiral conveying mechanism is provided inside the spiral conveying shell, a first discharge pipe is provided on one side of the spiral conveying shell and the first discharge pipe extends through the side wall of the first housing to the outside of the first housing, and a top fixing plate is provided on the upper right side of the first housing.

[0014] As a further embodiment of the present invention: the drive device includes a CVT gearbox and a fixed base. The CVT gearbox is disposed above the fixed base, and a servo motor is disposed above the CVT gearbox. The input shaft of the CVT gearbox is connected to the output shaft of the servo motor via a coupling. A gear transmission mechanism is disposed below the fixed base and above the top fixed plate. One gear in the gear transmission mechanism is connected to the input shaft of the CVT gearbox, and the other gear in the gear transmission mechanism is connected to the screw conveyor mechanism. The CVT gearbox has a speed-changing output shaft, and an angle sensor is disposed on the speed-changing output shaft.

[0015] As a further embodiment of the present invention: the locking mechanism includes a fixed frame, a movable plate is slidably disposed on the inner side of the fixed frame, a first electric push rod is fixedly disposed on the outer side of the fixed frame and the output shaft of the first electric push rod passes through the fixed frame and is fixedly connected to the movable plate, a first limiting groove is provided on the first screen, a second limiting groove is provided on the second screen, and a limiting post that cooperates with the first limiting groove and the second limiting groove is fixedly disposed on the outer end face of the movable plate respectively.

[0016] As a further embodiment of the present invention: the automatic lifting device includes a second electric push rod, a through hole is provided on the first discharge hopper, a second gate is slidably disposed in the through hole, a first gate is slidably disposed in the second discharge hopper, the output shaft of the second electric push rod is connected to the first gate and the second gate through a connecting bracket, and a plurality of limiting blocks are provided on the connecting bracket and the limiting blocks are fixedly connected to the second housing.

[0017] As a further embodiment of the present invention: the first counting device includes a third housing, the inner side of the third housing has a diagonally arranged portion, a counting camera is fixedly arranged in the middle of the arranged portion, and supplementary lights are respectively arranged on both sides of the counting camera.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. A servo motor is used as the power source, and the screw conveyor is driven to rotate through the gear transmission mechanism, which facilitates the feeding of polytetrafluoroethylene granules to the subsequent devices. An angle sensor monitors the rotation direction of the speed output shaft, which facilitates the orderly discharge of polytetrafluoroethylene granules to the outside.

[0020] 2. The vertical rotation speed of the rotating shaft is controlled by a CVT gearbox, which facilitates the screening of PTFE particles. The deflection lifting part cooperates with the base and ball bearings to make the relevant mechanisms in the second housing reciprocate in the vertical direction, providing a vertical vibration source. The ion air bar removes static electricity from the PTFE particles, preventing them from clumping with dust and other substances, which facilitates the conveying of PTFE particles. Moreover, the impurities after static removal are easier for the dust collector to remove, thereby improving the cleanliness of the PTFE particle surface. The first screen and the second screen screen screen the PTFE particles respectively. When the vertical rotating shaft rotates, the first screen and the second screen screen will undulate up and down, which facilitates the speed of screening PTFE particles and improves the screening quality of PTFE particles. Several cleaning balls clean the first screen and the second screen screen to prevent PTFE particles from clogging the screens. The vibration motor located at the bottom provides vibration for the entire graded screening and feeding device, which facilitates the screening of PTFE particles and improves the screening efficiency of PTFE particles.

[0021] 3. The first electric push rod drives the moving plate to move, thereby controlling the limiting column to limit the rotation of the first screen and the second screen, so as to facilitate the discharge of polytetrafluoroethylene particles.

[0022] 4. The counting camera monitors the polytetrafluoroethylene particles, the supplementary light provides illumination for the counting sampling, and the graded screening and feeding device grades the polytetrafluoroethylene particles by size, so that the first counting device can accurately count the graded polytetrafluoroethylene particles. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 2 This is a top view of the structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the main structure of the present invention.

[0026] Figure 4 This is a partial exploded view of the material storage and feeding device in this invention.

[0027] Figure 5 This is a three-dimensional structural diagram of the intermediate screening and feeding device of the present invention.

[0028] Figure 6 This is a schematic diagram of a partial cross-sectional three-dimensional structure of the first screen in this invention.

[0029] Figure 7 This is a partial three-dimensional structural diagram of the locking mechanism in this invention.

[0030] Figure 8This is a partial three-dimensional structural diagram of the automatic lifting device in this invention.

[0031] Figure 9 This is a partial three-dimensional structural diagram of the first counting device in this invention.

[0032] Figure reference numerals: 1. Material storage and feeding device; 11. First housing; 12. Screw conveyor housing; 13. Screw conveyor mechanism; 14. First discharge pipe; 15. Top fixing plate; 151. Base; 152. Ball bearing; 2. Drive device; 21. CVT gearbox; 211. Gear output shaft; 212. Angle sensor; 22. Servo motor; 23. Fixing seat; 24. Gear transmission mechanism; 3. Staged screening and feeding device; 31. Second housing; 3101. Limiting support part; 3102. Guide part; 32. Slide rail; 33. Vertical rotation shaft; 34. First sealed bearing; 35. Second sealed bearing; 36. Deflection lifting part; 37. Key connection part; 38. First screen; 381. First limiting groove; 39. Second screen; 391. Second limiting groove; 310. Cleaning ball; 311. Locking mechanism; 3111. Fixing frame; 31 12. First electric push rod; 3113. Moving plate; 3114. Limiting post; 312. First discharge hopper; 3121. Second discharge pipe; 3122. First high-pressure nozzle; 313. Second discharge hopper; 3131. Third discharge pipe; 3132. Second high-pressure nozzle; 314. Automatic lifting device; 3141. Second electric push rod; 3142. Connecting bracket; 3143. First gate; 3144. Second gate; 3145. Limiting block; 315. Dust removal pipe; 316. First solenoid valve; 317. Dust collector; 318. Manifold; 319. Second solenoid valve; 320. Manifold box; 321. Vibrating motor; 322. Ionizing air bar; 4. First counting device; 41. Third outer casing; 42. Layout part; 43. Counting camera; 44. Supplementary light; 5. First measuring device; 6. Second counting device; 7. Second measuring device. Detailed Implementation

[0033] The following embodiments will describe the present invention in detail with reference to the accompanying drawings. In the drawings or description, similar or identical parts are referred to by the same reference numerals, and in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this invention are merely illustrative and not intended to limit the scope of the invention. Any obvious modifications or changes made to this invention do not depart from the spirit and scope of the invention.

[0034] Example

[0035] Please see Figures 1-9In this embodiment of the invention, a precise conveying and metering device for polytetrafluoroethylene (PTFE) particles includes a storage and feeding device 1. A driving device 2 is arranged above the right side of the storage and feeding device 1, and a graded screening and feeding device 3 is arranged below the driving device 2. A first counting device 4 and a second counting device 6 are respectively arranged to the right side of the graded screening and feeding device 3. A first metering device 5 is arranged below the first counting device 4, and a second metering device 7 is arranged below the second counting device 6. The first counting device 4 and the second counting device 6 have the same structure, and the first metering device 5 and the second metering device 7 have the same structure.

[0036] The material storage and feeding device 1 includes a first housing 11, with a material guiding slope at the bottom of the inner side of the first housing 11. A spiral conveying outer shell 12 is provided inside the first housing 11, and a spiral conveying mechanism 13 is provided inside the spiral conveying outer shell 12. A first discharge pipe 14 is provided on one side of the spiral conveying outer shell 12 and extends through the side wall of the first housing 11 to the outside of the first housing 11. A top fixing plate 15 is provided on the upper right side of the first housing 11.

[0037] The drive unit 2 includes a CVT gearbox 21 and a fixed base 23. The CVT gearbox 21 is positioned above the fixed base 23. A servo motor 22 is mounted above the CVT gearbox 21, and the input shaft of the CVT gearbox 21 is connected to the output shaft of the servo motor 22 via a coupling. A gear transmission mechanism 24 is positioned below the fixed base 23 and above the top fixed plate 15. One gear in the gear transmission mechanism 24 is connected to the input shaft of the CVT gearbox 21, and the other gear in the gear transmission mechanism 24 is connected to the screw conveyor mechanism 13. The CVT gearbox 21 has a variable speed output shaft 211, on which an angle sensor 212 is mounted. The servo motor 22 serves as the power source, driving the screw conveyor mechanism 13 to rotate via the gear transmission mechanism 24, facilitating the feeding of polytetrafluoroethylene (PTFE) particles to subsequent devices. The angle sensor 212 monitors the rotation direction of the variable speed output shaft 211, facilitating the orderly discharge of the PTFE particles.

[0038] The graded screening and feeding device 3 includes a second housing 31. The bottom inner side of the second housing 31 has a guide section 3102. A slide rail 32 is provided on the left side of the second housing 31 and is fixedly mounted on the right end face of the first housing 11. The top of the second housing 31 has a limiting support section 3101. An ion air bar 322 is provided on one side of the limiting support section 3101. A vertical rotating shaft 33 is rotatably mounted on the top and bottom of the limiting support section 3101 via a first sealed bearing 34 and a second sealed bearing 35, respectively. The upper end of the vertical rotating shaft 33 has a keyed connection section 37, which is keyed to the speed-changing output shaft 211. A deflector is fixedly mounted below the keyed connection section 37 on the vertical rotating shaft 33. The lowering part 36 has a base 151 fixedly mounted on one side of the top fixing plate 15. Ball bearings 152, which cooperate with the deflection lifting part 36, are arranged opposite each other on the base 151. A first screen 38 and a second screen 39 are fixedly mounted at the bottom of the vertical rotating shaft 33. The first screen 38 and the second screen 39 are inclined. A plurality of cleaning balls 310 are arranged between the first screen 38 and the second screen 39. A locking mechanism 311, which cooperates with the first screen 38 and the second screen 39, is provided on the front side of the second housing 31. A first discharge hopper 312 and a second discharge hopper 313, which cooperate with the first screen 38 and the second screen 39, are respectively provided on the right side of the second housing 31. The first discharge hopper 312 is discharged through the second discharge pipe 3121. The second discharge pipe 3121 is connected to the first counting device 4. A first high-pressure spray pipe 3122 is provided on the second discharge pipe 3121. The second discharge hopper 313 is connected to the second counting device 6 through the third discharge pipe 3131. The third discharge pipe 3131 is provided with a second high-pressure spray pipe 3132. The diameter of the second discharge pipe 3121 and the third discharge pipe 3131 is set to match the size of the sieve holes of the first screen 38 and the second screen 39. An automatic lifting device 314 is provided between the first discharge hopper 312 and the second discharge hopper 313. A dust collector 317 is provided on the rear bottom side of the second housing 31. The second housing 31 is connected to the dust collector 317 through a dust collector pipe 315. A first solenoid valve 316 is provided on the dust collector pipe 315. A collection box 320 is located below the second housing 31. The second housing 31 is connected to the collection box 320 via a collection pipe 318. A second solenoid valve 319 is installed on the collection pipe 318. Vibration motors 321 are arranged opposite each other on both sides of the collection pipe 318 on the lower end face of the second housing 31. The rotation speed of the vertical rotating shaft 33 is controlled by a CVT gearbox 21 to facilitate the screening of polytetrafluoroethylene (PTFE) particles. The deflection lifting part 36 cooperates with the base 151 and the ball bearing 152 to make the relevant mechanisms inside the second housing 31 reciprocate in the vertical direction, providing a vertical vibration source. The ion air bar 322 removes static electricity from the PTFE particles, preventing them from clumping together with dust and other substances, thus facilitating the conveying of the PTFE particles.Furthermore, the impurities removed by static electricity are easier for the dust collector 317 to remove, thereby improving the cleanliness of the PTFE particles. The first screen 38 and the second screen 39 respectively screen the PTFE particles. When the vertical rotating shaft 33 rotates, the first screen 38 and the second screen 39 will fluctuate up and down, which facilitates faster screening of PTFE particles and improves the screening quality. Several cleaning balls 310 clean the first screen 38 and the second screen 39, preventing PTFE particles from clogging the screens. The vibrating motor 321 located at the bottom provides vibration for the entire graded screening and feeding device 3, which facilitates the screening of PTFE particles and improves the screening efficiency.

[0039] The locking mechanism 311 includes a fixed frame 3111, a movable plate 3113 is slidably disposed on the inner side of the fixed frame 3111, and a first electric push rod 3112 is fixedly disposed on the outer side of the fixed frame 3111, with the output shaft of the first electric push rod 3112 passing through the fixed frame 3111 and fixedly connected to the movable plate 3113. A first limiting groove 381 is provided on the first screen 38, and a second limiting groove 391 is provided on the second screen 39. A limiting post 3114 that cooperates with the first limiting groove 381 and the second limiting groove 391 is fixedly disposed on the outer end face of the movable plate 3113. The movable plate 3113 is driven to move by the first electric push rod 3112, thereby controlling the limiting post 3114 to limit the rotation of the first screen 38 and the second screen 39, so as to facilitate the discharge of polytetrafluoroethylene particles.

[0040] The automatic lifting device 314 includes a second electric push rod 3141. A through hole is provided on the first discharge hopper 312, and a second gate 3144 is slidably disposed in the through hole. A through hole is provided on the second discharge hopper 313, and a first gate 3143 is slidably disposed in the through hole. The output shaft of the second electric push rod 3141 is connected to the first gate 3143 and the second gate 3144 through a connecting bracket 3142. A plurality of limiting blocks 3145 are provided on the connecting bracket 3142 and the limiting blocks 3145 are fixedly connected to the second housing 31. The connecting bracket 3142 is driven to move up and down by the second electric push rod 3141, so that the first gate 3143 and the second gate 3144 are in an open or closed state, thereby controlling whether polytetrafluoroethylene particles are discharged to the outside.

[0041] The first counting device 4 includes a third outer shell 41, with a diagonally arranged portion 42 on the inner side of the third outer shell 41. A counting camera 43 is fixedly arranged in the middle of the arranged portion 42, and supplementary lights 44 are respectively arranged on both sides of the counting camera 43. The counting camera 43 monitors the polytetrafluoroethylene particles, and the supplementary lights 44 provide supplementary lighting for the counting sampling. The graded screening and feeding device 3 grades the polytetrafluoroethylene particles by size, so that the first counting device 4 can accurately count the graded polytetrafluoroethylene particles.

[0042] During operation, polytetrafluoroethylene (PTFE) granules are added to the storage and feeding device 1. The servo motor 22 is started, driving the screw conveyor 13 to rotate via the gear transmission mechanism 24. This causes the PTFE granules in the first housing 11 to be fed to the graded screening and feeding device 3. The ion air bar 322 is started, blowing ion air into the second housing 31. The rotation speed of the vertical rotating shaft 33 is controlled by the CVT gearbox 21. With the cooperation of the deflection lifting part 36, the base 151, and the ball bearings 152 (there is a certain gap between the two ball bearings 152, and the function of the ball bearings 152 is to reduce friction), the relevant mechanisms on the vertical rotating shaft 33 move up and down relative to the speed change output shaft 211 along the slide rail 32. Simultaneously, the first screen 38 and the second screen 39 also rotate, facilitating the screening of PTFE particles. Under the action of ion wind, the agglomeration of PTFE particles is reduced. Furthermore, the cleaning ball 310 located between the first screen 38 and the second screen 39 cleans the screens and disperses the PTFE particles, further preventing agglomeration and blockage. The dust collector 317 and the vibration motor 321 are activated to perform dust removal inside the second housing 31. The vibration motor 321 provides vibration to the second housing 31. After the screening process is completed, the servo motor is turned off. Machine 22 monitors the rotation angle of the transmission output shaft 211 via angle sensor 212, aligning the first limiting groove 381 and the second limiting groove 391 on the first screen 38 and the second screen 39 with the limiting post 3114. The first electric push rod 3112 controls the limiting post 3114 to enter the first limiting groove 381 and the second limiting groove 391, thereby locking the first screen 38 and the second screen 39 (the locked state is the cross-sectional state shown in the attached diagram). The second electric push rod 3141 is then activated, opening the first gate 3143 and the second gate 3144. The vibration motor 321 acts as the vibration source, causing the polytetrafluoroethylene particles on the screens to exit through the first and second limiting grooves respectively. The hopper 312 and the second discharge hopper 313 discharge the material. The first high-pressure nozzle 3122 and the second high-pressure nozzle 3132 assist in the discharge. Then, the counting camera 43 counts the discharged polytetrafluoroethylene (PTFE) particles. After counting, the first metering device 5 and the second metering device 7 measure the graded PTFE particles, completing the grading process of PTFE particles of different sizes. The grading of PTFE particles is completed, and the counting and measurement of the graded PTFE particles are also completed. The PTFE particles are conveyed accurately with high quality and high efficiency. Finally, the second solenoid valve 319 is opened to collect impurities and small granular PTFE particles into the collection box 320 for subsequent processing.

[0043] It is noted here that the CVT gearbox 21 is existing technology. Through its speed change effect, the rotational speed of the screw conveyor 13 and the vertical rotating shaft 33 is matched. That is, the amount of material fed from the storage and feeding device 1 to the graded screening and feeding device 3 can be controlled, so there is no need to consider the problem of blockage caused by a large amount of material fed.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for precise conveying and metering of polytetrafluoroethylene (PTFE) particles, comprising a material storage and feeding device (1), characterized in that, A driving device (2) is provided on the upper right side of the material feeding device (1), and a graded screening material feeding device (3) is provided below the driving device (2). A first counting device (4) and a second counting device (6) are respectively provided on the right side of the graded screening material feeding device (3). A first metering device (5) is provided below the first counting device (4), and a second metering device (7) is provided below the second counting device (6). The first counting device (4) and the second counting device (6) have the same structure, and the first metering device (5) and the second metering device (7) have the same structure. The graded screening and feeding device (3) includes a second housing (31), with a guide section (3102) at the bottom inner side of the second housing (31), a slide rail (32) on the left side of the second housing (31), and a limiting support section (3101) at the top of the second housing (31). A vertical rotating shaft (33) is rotatably mounted on the top and bottom of the limiting support section (3101) via a first sealed bearing (34) and a second sealed bearing (35), respectively. The upper end of the vertical rotating shaft (33) has a keyed connection section (37). The key connection part (37) is keyed to the speed output shaft (211). The bottom of the vertical rotating shaft (33) is fixedly provided with a first screen (38) and a second screen (39). The front side of the second housing (31) is provided with a locking mechanism (311) that cooperates with the first screen (38) and the second screen (39). The right side of the second housing (31) is provided with a first discharge hopper (312) and a second discharge hopper (313) that cooperate with the first screen (38) and the second screen (39). The second discharge pipe (3121) is used to discharge the material. The first discharge hopper (312) is connected to the first counting device (4). A first high-pressure nozzle (3122) is provided on the second discharge pipe (3121). The second discharge hopper (313) is connected to the second counting device (6) through the third discharge pipe (3131). A second high-pressure nozzle (3132) is provided on the third discharge pipe (3131). An automatic lifting device (314) is provided between the first discharge hopper (312) and the second discharge hopper (313). A dust collector is provided on the rear side of the bottom of the second housing (31). 317), the second housing (31) is connected to the dust collector (317) through the dust removal pipe (315), the dust removal pipe (315) is provided with a first solenoid valve (316), the second housing (31) is provided with a collection box (320) below, the second housing (31) is connected to the collection box (320) through the collection pipe (318), the collection pipe (318) is provided with a second solenoid valve (319), and the two sides of the collection pipe (318) are provided with vibration motors (321) opposite to each other on the lower end face of the second housing (31).

2. The polytetrafluoroethylene particle precision conveying and metering device according to claim 1, characterized in that, Below the key connection part (37), a deflection lifting part (36) is fixedly installed on the vertical rotation shaft (33). A base (151) is fixedly installed on one side of the top fixing plate (15). A ball bearing (152) that cooperates with the deflection lifting part (36) is arranged opposite to the base (151).

3. The polytetrafluoroethylene particle precision conveying and metering device according to claim 2, characterized in that, An ion fan bar (322) is provided on one side of the limiting support part (3101).

4. The precise conveying and metering device for polytetrafluoroethylene particles according to claim 3, characterized in that, The first screen (38) and the second screen (39) are inclined, and a plurality of cleaning balls (310) are arranged between the first screen (38) and the second screen (39).

5. The polytetrafluoroethylene particle precision conveying and metering device according to claim 4, characterized in that, The diameters of the second discharge pipe (3121) and the third discharge pipe (3131) are matched with the mesh sizes of the first screen (38) and the second screen (39).

6. The precise conveying and metering device for polytetrafluoroethylene particles according to any one of claims 1-5, characterized in that, The material storage and feeding device (1) includes a first housing (11), the bottom of the inner side of the first housing (11) has a material guiding slope, the inner side of the first housing (11) is provided with a spiral conveying shell (12), the spiral conveying shell (12) is provided with a spiral conveying mechanism (13), the spiral conveying shell (12) is provided with a first discharge pipe (14) on one side and the first discharge pipe (14) extends through the side wall of the first housing (11) to the outside of the first housing (11), and a top fixing plate (15) is provided on the upper right side of the first housing (11).

7. The polytetrafluoroethylene particle precision conveying and metering device according to claim 6, characterized in that, The drive unit (2) includes a CVT gearbox (21) and a fixed base (23). The CVT gearbox (21) is located above the fixed base (23). A servo motor (22) is located above the CVT gearbox (21), and the input shaft of the CVT gearbox (21) is connected to the output shaft of the servo motor (22) via a coupling. A gear transmission mechanism (24) is located below the fixed base (23) and above the top fixed plate (15). One gear in the gear transmission mechanism (24) is connected to the input shaft of the CVT gearbox (21), and the other gear in the gear transmission mechanism (24) is connected to the screw conveyor mechanism (13). The CVT gearbox (21) has a speed-changing output shaft (211), and an angle sensor (212) is located on the speed-changing output shaft (211).

8. The precise conveying and metering device for polytetrafluoroethylene particles according to claim 7, characterized in that, The locking mechanism (311) includes a fixed frame (3111), a movable plate (3113) is slidably arranged inside the fixed frame (3111), a first electric push rod (3112) is fixedly arranged outside the fixed frame (3111), and the output shaft of the first electric push rod (3112) passes through the fixed frame (3111) and is fixedly connected to the movable plate (3113). A first limiting groove (381) is opened on the first screen (38), a second limiting groove (391) is opened on the second screen (39), and a limiting post (3114) that cooperates with the first limiting groove (381) and the second limiting groove (391) is fixedly arranged on the outer end face of the movable plate (3113).

9. The precise conveying and metering device for polytetrafluoroethylene particles according to claim 8, characterized in that, The automatic lifting device (314) includes a second electric push rod (3141), a through hole is provided on the first discharge hopper (312), a second gate (3144) is slidably arranged in the through hole, a through hole is provided on the second discharge hopper (313), a first gate (3143) is slidably arranged in the through hole, the output shaft of the second electric push rod (3141) is connected to the first gate (3143) and the second gate (3144) through a connecting bracket (3142), and a plurality of limiting blocks (3145) are provided on the connecting bracket (3142) and the limiting blocks (3145) are fixedly connected to the second housing (31).

10. The precise conveying and metering device for polytetrafluoroethylene particles according to claim 9, characterized in that, The first counting device (4) includes a third outer shell (41), and the third outer shell (41) has a layout part (42) on the inner side diagonally. A counting camera (43) is fixedly installed in the middle of the layout part (42), and supplementary lights (44) are respectively installed on both sides of the counting camera (43).

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