A fluororesin production bidirectional filter

Abstract

The utility model relates to fluorine resin production and processing technical field, especially a kind of fluorine resin production bidirectional filter, including box, cylindrical pipe, cylinder, drive assembly and blow assembly, cylindrical cavity is provided in box, and feed pipe and blow-off pipe are provided on the box and are communicated with cylindrical cavity;Cylindrical pipe is coaxially arranged in cylindrical cavity, and a plurality of through holes are provided on cylindrical pipe, and arc filter screen is provided in through hole;Cylinder is arranged on the end face of cylindrical cavity, and the other end of cylinder is inserted into the inside passage of cylindrical pipe, and arc filter screen and the outer wall of cylinder slide;Flow guide groove A and flow guide groove B are provided on cylinder, and discharge pipe that is communicated flow guide groove A is provided on cylinder;Drive assembly drives cylindrical pipe to rotate under working condition;The output end of blow assembly is communicated with flow guide groove B, and blow assembly carries out backflush cleaning to arc filter screen under working condition.The utility model can automatically backflush cleaning to filter screen while filtering raw materials uninterruptedly.

Description

Technical Field

[0001] This utility model relates to the field of fluoropolymer production and processing technology, and in particular to a bidirectional filter for fluoropolymer production. Background Technology

[0002] After the polymerization reaction of fluoropolymers is completed, in addition to the target fluoropolymer, there are usually a small amount of unreacted monomers and other impurities remaining in the reactor. If these impurities are not removed, they will affect the purity, physical properties and thermal stability of the final resin. Traditional filters use unidirectional filtration, which is easy to clog, requires shutdown for cleaning, is time-consuming and labor-intensive, and has low efficiency.

[0003] Chinese Patent No. CN218687066U discloses a bidirectional filter for fluoropolymer production. This utility model uses multiple first and second filter screens to ensure uniform distribution of the fluoropolymer during filtration. This dual filtration improves the filtration speed. Simultaneously, a vibration mechanism causes the multiple first and second filter screens to collide during fluoropolymer filtration. The resulting impact force causes the first and second filter screens to vibrate, driving the flow of fluoropolymer outside the screens and improving filtration efficiency and quality while preventing clogging.

[0004] However, the device still has shortcomings: impurities accumulate on the surface of the filter screen, which affects the filtration efficiency of the filter screen. The device lacks an active discharge structure for impurities. Furthermore, considering the inlet and outlet structure of the device, it can be determined that the device needs to pause feeding to clean the impurities on the filter screen, which is time-consuming, labor-intensive, and also affects processing efficiency. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a bidirectional filter produced from fluororesin.

[0006] The technical solution of this utility model is: a bidirectional filter for fluoropolymer production, including a housing, a cylindrical cavity inside the housing, and an inlet pipe and a drain pipe connected to the cylindrical cavity on the housing.

[0007] A cylindrical tube is coaxially arranged inside a cylindrical cavity and fits against its inner wall. Several through holes connected to its inner channel are arranged in a ring array around its axis on the arc surface of the cylindrical tube. An arc-shaped filter screen is installed in the through holes.

[0008] A cylinder has one end coaxially mounted on the end face of the cylindrical cavity, and the other end of the cylinder is inserted into the inner channel of the cylindrical tube and slidably connected to its inner wall. An arc-shaped filter screen slides against the outer wall of the cylinder. The cylinder is provided with an upward-facing guide channel A and an opening facing the sewage pipe B. The cylinder is also provided with a discharge pipe that connects the outside world to the guide channel A.

[0009] The drive assembly is mounted on the housing and drives the cylindrical tube to rotate during operation.

[0010] And a jet cleaning component, which is installed on the housing. The output end of the jet cleaning component is connected to the guide channel B. When the jet cleaning component is in operation, it backwashes and cleans the arc-shaped filter screen that has rotated to the opening of the guide channel B.

[0011] Preferably, the feed pipe is always connected to the guide channel A, the bottom of the box is provided with a discharge hole, the discharge hole is covered with a collection hopper, the opening size of the discharge hole is not less than the opening size of the through hole, and the input end of the sewage pipe is connected to the output end of the collection hopper.

[0012] Preferably, the cylinder is fixedly connected to the end face of the cylindrical cavity.

[0013] Preferably, the blowing assembly includes an air inlet pipe and a fan, and a bracket is provided at the bottom of the housing; one end of the air inlet pipe is inserted into the guide groove B along the axial direction of the cylinder and communicates with its interior, the fan body is set on the bracket, the input end of the air inlet pipe is connected to the output end of the fan, and an air filter is provided at the input end of the fan.

[0014] Preferably, a wide-angle nozzle with its opening facing downwards is provided inside the guide channel B, and the output end of the air intake pipe is connected to the input end of the wide-angle nozzle.

[0015] Preferably, the drive assembly includes a motor and a synchronous belt. A transmission shaft is rotatably mounted on the bracket. The motor body is mounted on the bracket. The output end of the motor is connected to the transmission shaft via a coupling. A pulley A is coaxially mounted on the transmission shaft. A central shaft is coaxially mounted on the end face of the cylindrical tube. A pulley B is coaxially mounted on one end of the central shaft that extends out of the housing. Pulley A and pulley B are connected by a synchronous belt drive.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] By setting it up. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the connection structure of the various components on a cylindrical tube.

[0020] Figure 3 This is a schematic diagram of the connection structure between the cylindrical tube and the cylinder.

[0021] Figure 4 This is a schematic diagram of the connection structure between the cylinder and the discharge pipe.

[0022] Reference numerals: 1. Box body; 2. Feed pipe; 3. Collection hopper; 4. Drain pipe; 5. Cylindrical pipe; 51. Through hole; 52. Circular groove; 53. Central shaft; 6. Arc-shaped filter screen; 7. Cylinder; 71. Guide channel A; 72. Guide channel B; 8. Discharge pipe; 9. Wide-angle nozzle; 10. Air inlet pipe; 11. Support; 12. Fan; 13. Drive assembly; 14. Rotating shaft; 15. Scraper; 16. Gear; 17. Gear ring. Detailed Implementation

[0023] Example 1

[0024] like Figures 1-4As shown, this utility model proposes a bidirectional filter for fluoropolymer production, comprising a housing 1, a cylindrical tube 5, a cylinder 7, a drive assembly 13, and a jetting assembly. A support 11 is mounted on the housing 1, and a cylindrical cavity is formed inside the housing 1. An inlet pipe 2 and a drain pipe 4, communicating with the cylindrical cavity, are mounted on the housing 1. A discharge hole is provided at the bottom of the housing 1, and a collection hopper 3 is provided outside the discharge hole. The input end of the drain pipe 4 is connected to the output end of the collection hopper 3. The cylindrical tube 5 is coaxially arranged inside the cylindrical cavity and fits against its inner wall. Several through holes 51, communicating with their inner channels, are arranged in a circular array around the axis of the cylindrical tube 5 on its arc surface. The opening size of the discharge hole is not smaller than the opening size of the through holes 51, and an arc-shaped filter screen 6 is installed inside the through holes 51. One end of the cylinder 7 is coaxially mounted on the end face of the cylindrical cavity, and the cylinder 7 is fixedly connected to the end face of the cylindrical cavity. The other end of the cylinder 7 is inserted into the inner channel of the cylindrical tube 5 and slidably connected to its inner wall. The arc-shaped filter screen 6 slides against the outer wall of the cylinder 7. The cylinder 7 is provided with an upward-opening guide channel A71 and a guide channel B72 with an opening facing the drain pipe 4. The cylinder 7 is provided with a discharge pipe 8 that connects to the outside and the guide channel A71. The feed pipe 2 is always kept in communication with the guide channel A71. A drive assembly 13 is mounted on the housing 1. The drive assembly 13 includes a motor and a synchronous belt. A transmission shaft is rotatably mounted on a bracket 11. The motor body is mounted on the bracket 11, and the motor output end is connected to the transmission shaft via a coupling. A pulley A is coaxially mounted on the transmission shaft. A central shaft 53 is coaxially mounted on the end face of the cylindrical tube 5. A pulley B is coaxially mounted on one end of the central shaft 53 extending out of the housing 1. Pulley A and pulley B are connected by a synchronous belt. The drive assembly 13 drives the cylindrical tube 5 to rotate during operation. A jetting assembly is mounted on the housing 1. The jetting assembly includes an air inlet pipe 10 and a fan 12. One end of the air inlet pipe 10 is inserted into the guide groove B72 along the axial direction of the cylinder 7 and communicates with its interior. The fan 12 is mounted on the bracket 11. The input end of the air inlet pipe 10 communicates with the output end of the fan 12. An air filter is mounted at the input end of the fan 12. The jetting assembly includes the air inlet pipe 10 and the fan 12. The bracket 11 is located at the bottom of the housing 1. One end of the air intake pipe 10 is inserted into the guide groove B72 along the axial direction of the cylinder 7 and communicates with its interior. A wide-angle nozzle 9 with its opening facing downward is installed in the guide groove B72. The output end of the air intake pipe 10 is connected to the input end of the wide-angle nozzle 9. The blower 12 is mounted on the bracket 11. The input end of the air intake pipe 10 is connected to the output end of the blower 12. An air filter element is installed at the input end of the blower 12. In operation, the blowing assembly backwashes and cleans the arc-shaped filter 6 that has rotated to the opening of the guide groove B72.

[0025] In this embodiment, the motor and fan 12 are started first. The motor drives the cylindrical tube 5 to rotate at a relatively slow speed, so that each through hole passes through the inlet of the feed pipe 2 and the discharge hole. The fan 12 sends air into the wide-angle nozzle 9 at high speed, so that the high-speed airflow blows outward from the side of the arc-shaped filter screen 6 near the axis of the cylindrical tube 5. The high-speed airflow is used to back-blow and clean the arc-shaped filter screen 6 at the outlet of the guide groove B72. Raw materials are added into the housing 1 through the feed pipe 2. The raw materials enter the through hole 51 connected to the feed pipe 2. The target fluoropolymer in the raw materials permeates the filter holes of the arc-shaped filter screen 6 and enters the guide channel A71. The fluoropolymer is discharged from the storage tank 8, while impurities remain on the arc-shaped filter screen 6. As the arc-shaped filter screen 6 rotates with the cylindrical tube 5, the residual fluoropolymer gradually enters the guide channel A71. When the arc-shaped filter screen 7 rotates to the discharge hole, high-speed air is sprayed downward from above the arc-shaped filter screen 6 in the current state, blowing the impurities clogging the filter holes and the impurities falling on the arc-shaped filter screen 6 together towards the collection hopper 3 and finally discharged from the drain pipe 4.

[0026] Example 2

[0027] like Figure 2 As shown, the present invention proposes a bidirectional filter for fluoropolymer production. Compared with Embodiment 1, one end of the cylindrical tube 5 is provided with a circular groove 52. A rotating shaft 14 rotatably connected to the cylindrical tube 5 is provided in the through hole 51. A scraper 15 is provided on the rotating shaft 14. The scraper 15 slides in contact with the arc surface of the arc-shaped filter screen 6 (the side near the feed port of the through hole 51). One end of the rotating shaft 14 is inserted into the circular groove 52. A gear 16 is coaxially provided at the end of the rotating shaft 14 inserted into the circular groove 52. A toothed ring 17 coaxial with the circular groove 52 is fixedly provided on the inner wall of the cylindrical cavity of the housing 1. The toothed ring 17 is inserted into the circular groove 52 and meshes with each gear 16.

[0028] In this embodiment, when the driving component 13 drives the cylindrical tube 5 to rotate, the gear 16 rolls around the periphery of the gear ring 17, thereby driving the rotating shaft 14 and scraper 15 to rotate. The rotating scraper 15 disturbs the mixed raw material in the through hole 51, preventing impurities from completely clogging the filter holes of the arc-shaped filter screen 6, thereby accelerating the separation of impurities in the raw material from the target fluororesin, thus preventing the fluororesin from being discharged excessively from the drain pipe 4.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A bidirectional filter produced from fluororesin, characterized in that, include: Box (1), a cylindrical cavity is provided inside the box (1), and a feed pipe (2) and a drain pipe (4) connected to the cylindrical cavity are provided on the box (1); A cylindrical tube (5) is coaxially arranged inside the cylindrical cavity and fits against its inner wall. Several through holes (51) communicating with its inner channel are arranged in a ring array around its axis on the arc surface of the cylindrical tube (5). An arc-shaped filter screen (6) is arranged inside the through hole (51). A cylinder (7) has one end coaxially set on the end face of the cylindrical cavity, and the other end of the cylinder (7) is inserted into the inner channel of the cylindrical tube (5) and slidably connected to its inner wall. The arc-shaped filter screen (6) slides with the outer wall of the cylinder (7). The cylinder (7) is provided with an upward-facing guide channel A (71) and an upward-facing guide channel B (72) facing the sewage pipe (4). The cylinder (7) is provided with an outlet pipe (8) connecting the outside world and the guide channel A (71). Drive assembly (13) is mounted on housing (1). Drive assembly (13) drives cylindrical tube (5) to rotate in working state. And a spraying assembly, which is installed on the housing (1). The output end of the spraying assembly is connected to the guide channel B (72). When the spraying assembly is in operation, it backwashes and cleans the arc-shaped filter screen (6) that has rotated to the opening of the guide channel B (72).

2. The bidirectional filter produced from fluoropolymer resin according to claim 1, characterized in that, The feed pipe (2) is always connected to the guide channel A (71). The bottom of the box (1) is provided with a discharge hole. The discharge hole is covered with a collection hopper (3). The opening size of the discharge hole is not less than the opening size of the through hole (51). The input end of the sewage pipe (4) is connected to the output end of the collection hopper (3).

3. The bidirectional filter for fluororesin production according to claim 1, wherein The cylinder (7) is fixedly connected to the end face of the cylindrical cavity.

4. A bidirectional filter produced from fluoropolymer resin according to claim 1, characterized in that, The blowing assembly includes an air inlet pipe (10) and a fan (12). A bracket (11) is provided at the bottom of the housing (1). One end of the air inlet pipe (10) is inserted into the guide groove B (72) along the axial direction of the cylinder (7) and communicates with its interior. The fan (12) is mounted on the bracket (11) with its main body. The input end of the air inlet pipe (10) is connected to the output end of the fan (12). An air filter is provided at the input end of the fan (12).

5. A bidirectional filter produced from fluororesin according to claim 4, characterized in that, A wide-angle nozzle (9) with its opening facing downwards is installed inside the guide channel B (72), and the output end of the air inlet pipe (10) is connected to the input end of the wide-angle nozzle (9).

6. A bidirectional filter produced from fluororesin according to claim 4, characterized in that, The drive assembly (13) includes a motor and a synchronous belt. A drive shaft is rotatably mounted on the bracket (11). The motor body is mounted on the bracket (11). The output end of the motor is connected to the drive shaft via a coupling. A pulley A is coaxially mounted on the drive shaft. A central shaft (53) is coaxially mounted on the end face of the cylindrical tube (5). A pulley B is coaxially mounted on one end of the central shaft (53) that extends out of the housing (1). Pulley A and pulley B are connected by a synchronous belt drive.

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