PFA material purification equipment

Abstract

The present invention provides a PFA material purification device, and belongs to the field of material purification, the PFA material purification device comprises: a base provided with a housing; a purification mixing assembly; the purifying and mixing assembly is mounted on the base and the shell; the purifying and mixing assembly rotates forwards, so that materials can be stirred in an up-down floating manner and can circularly flow; the shielding assembly is mounted on the shell; the shielding assembly can shield the purification mixing assembly rotating forwards, and the purification mixing assembly conducts centrifugal treatment on materials when rotating backwards. According to the PFA material purification equipment, the purification efficiency is remarkably improved, the functions of dissolution, precipitation, centrifugation and collection are integrated through integrated design, repeated transfer of precipitates is avoided, operation is simplified, vertical floating stirring and uniform mixing of materials are achieved through the purification mixing assembly, automatic treatment is achieved through the shielding and discharging assembly, manual intervention is reduced, and the production efficiency is improved. And by utilizing the Bernoulli principle, the copolymer can be discharged, the centrifugal net cylinder can be effectively cleaned, and residues are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of material purification, and particularly to a PFA material purification device. Background Art

[0002] Perfluoropropyl vinyl ether-tetrafluoroethylene copolymer (PFA) is a fluoropolymer with excellent properties, and its preparation method usually involves specific polymerization reaction conditions and subsequent purification steps. The following is a detailed description of its preparation and purification process:

[0003] The preparation method of perfluoropropyl vinyl ether-tetrafluoroethylene copolymer generally includes the following steps: Prepare reaction materials: Introduce deoxygenated deionized water and a chain transfer agent into the polymerization kettle and stir well. Introduce a rare earth-based anti-aging agent and perfluoropropyl vinyl ether into the polymerization kettle through a pump.

[0004] Set reaction conditions: Perform vacuum replacement and degassing on the polymerization kettle to ensure the purity of the reaction environment. Heat up to a certain temperature (such as 20-45 °C) and introduce tetrafluoroethylene to the reaction pressure. Initiate the polymerization reaction: Add an initiator (such as ammonium persulfate, sodium persulfate, potassium persulfate, etc.) to initiate the polymerization reaction. Continuously introduce tetrafluoroethylene during the reaction to maintain the reaction pressure, and continuously add perfluoropropyl vinyl ether through a precision pump. Reaction end and product treatment: When the replenishment amount of tetrafluoroethylene reaches a predetermined value, the copolymerization ends. The product is washed and dried to obtain perfluoropropyl vinyl ether-tetrafluoroethylene copolymer.

[0005] Purification method: The purification of perfluoropropyl vinyl ether-tetrafluoroethylene copolymer generally involves the following steps: Preliminary treatment: Preliminarily wash the copolymer obtained from the polymerization reaction to remove unreacted monomers and other impurities. Dissolution and precipitation: Dissolve the preliminarily treated copolymer in an appropriate solvent. Separate the copolymer from the solution by precipitation or crystallization. This step helps to further remove impurities and improve the purity of the copolymer.

[0006] However, there are multiple existing purification devices. It is necessary to perform dissolution, precipitation, then centrifuge the precipitate to obtain it, then take out the precipitate for washing, and then place it in the centrifuge again for separation to obtain it. The operation is cumbersome and the precipitate is transferred multiple times, reducing the purification efficiency; for this reason, the present application proposes a PFA material purification device. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention provides a PFA material purification device.

[0008] An embodiment of the present invention provides a PFA material purification device, including:

[0009] A base, on which a housing is installed;

[0010] Purification and mixing assembly; the purification and mixing assembly is installed on the base and the outer shell, and when the purification and mixing assembly rotates forward, it can realize the up-and-down floating stirring of the material and make the material circulate;

[0011] Blocking assembly installed on the outer shell; the blocking assembly can block the forward-rotating purification and mixing assembly, and when the purification and mixing assembly rotates in reverse, it centrifuges the material, and the blocking assembly can move upward;

[0012] Discharging assembly installed on the outer shell; the discharging assembly can discharge the purified material located in the purification and mixing assembly.

[0013] Further, the purification and mixing assembly includes a sleeve that penetrates the bottom of the outer shell and is rotatably connected thereto. A centrifugal mesh cylinder is fixed to the upper end of the sleeve. A rotating rod that penetrates the sleeve and is rotatably connected thereto is provided inside the sleeve. The rotating rod penetrates the centrifugal mesh cylinder and is rotatably connected thereto. A rectangular cylinder is fixed to the upper end of the rotating rod. A plurality of circulation holes are provided through the rectangular cylinder. A rectangular piston is slidably connected inside the rectangular cylinder. A vertical pipe is fixed to the upper end of the rectangular piston. A collar is fixed to the upper end of the vertical pipe. A reciprocating lead screw is fitted inside the collar. A plurality of stirring cross bars are fixed to the vertical pipe. A plurality of stirring vertical bars are fixed to the bottom of the stirring cross bars.

[0014] Further, it further includes a driving mechanism for driving the rotation of the rotating rod and the sleeve. The driving mechanism includes a mounting plate installed at the bottom of the outer shell. A motor is installed on the mounting plate. The output end of the motor is fixedly connected with a first bevel gear. A one-way bearing is fixed to the sleeve. A second bevel gear is fixed to the one-way bearing. A third bevel gear is fixed to the rotating rod. The first bevel gear meshes with the second bevel gear and the third bevel gear.

[0015] Further, the blocking assembly includes a cross plate fixed to the outer shell. A first piston cylinder fixedly connected to the cross plate is provided through the cross plate. A first sliding piston is slidably connected inside the first piston cylinder. A cross block is fixed to the first piston cylinder. A spring is fixed to the cross block and the first sliding piston. A driving rod is fixedly connected to the bottom of the first sliding piston. The driving rod penetrates the first piston cylinder and is slidably connected thereto. A covering cylinder is fixedly connected to the bottom of the driving rod. The covering cylinder is fixedly connected with the reciprocating lead screw and is arranged outside the centrifugal mesh cylinder.

[0016] Further, the discharging assembly includes an air storage tank installed on the cross plate. An exhaust pipe is installed on the air storage tank. A solenoid valve is installed on the exhaust pipe. A suction pipe is installed at the bottom of the exhaust pipe. The suction pipe penetrates the cross plate and the covering cylinder and is slidably connected thereto. A suction hole opposite to the centrifugal mesh cylinder is provided through the suction pipe.

[0017] Further, it further includes a gas supply mechanism. The gas supply mechanism includes a second piston cylinder installed on the inner wall of the base. A second sliding piston is slidably connected inside the second piston cylinder. A vertical rod is rotatably connected to the bottom of the outer shell. A first gear is fixed on the sleeve. A second gear is fixed on the vertical rod. The first gear meshes with the second gear. The bottom of the vertical rod is fixedly connected with a circular plate. The bottom of the circular plate is eccentrically hinged with a connecting rod. The connecting rod is hinged with the second sliding piston. An air inlet pipe is installed on the second piston cylinder. A first one-way valve is installed on the air inlet pipe. A delivery pipe is installed on the second piston cylinder. The delivery pipe is connected to the gas storage tank. A branch pipe is installed on the delivery pipe. The branch pipe is connected to the first piston cylinder and is located below the first sliding piston. Second one-way valves are installed on both the branch pipe and the delivery pipe.

[0018] Further, a pressure relief pipe is installed on the gas storage tank. A pressure relief valve is installed on the pressure relief pipe.

[0019] Further, the outer diameter of the upper end of the centrifugal mesh cylinder is smaller than that of the lower end. The centrifugal mesh cylinder is provided with mesh holes and is arranged at the lower end part of the centrifugal mesh cylinder.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. When the rotating rod rotates, the collar moves up and down reciprocally on the reciprocating screw rod, that is, the collar rotates and moves up and down reciprocally, thereby driving the stirring cross bar and the stirring vertical bar to rotate and move up and down. By rotating the stirring cross bar and the stirring vertical bar, the perfluoropropyl vinyl ether-tetrafluoroethylene copolymer particles can be fully mixed with perfluorodimethylcyclobutane, enabling the perfluoropropyl vinyl ether-tetrafluoroethylene copolymer particles to be quickly dissolved in perfluorodimethylcyclobutane and mixed evenly. By adding methanol into the centrifugal mesh cylinder through the through groove, the methanol can be fully mixed with the mixed solution, which is beneficial to the precipitation of the copolymer.

[0022] 2. Air is transported through the delivery pipe into the branch pipe and then into the first piston cylinder through the branch pipe. The air in the first piston cylinder increases, thereby driving the first sliding piston to move upward. The upward movement of the first sliding piston drives the driving rod and the covering cylinder to move upward. At this time, the covering cylinder moves upward and does not abut against the centrifugal mesh cylinder, so that the mesh holes on the centrifugal mesh cylinder are no longer blocked and limited, and the friction between the two is also reduced.

[0023] 3. The copolymer can be fully mixed and stirred with ionized water. The centrifuged copolymer is washed with ionized water. After the washing is completed, the motor is reversed, so that the washed copolymer can be separated from the ionized water. There is no need to transfer and wash the precipitate, etc., reducing the purification steps and improving the work efficiency.

[0024] 4. The air flow velocity above the material suction pipe is high and the pressure is low, while the air flow velocity at the material suction hole is low and the pressure is high. Therefore, there is a pressure difference between the two (Bernoulli's principle). As a result, the copolymer located on the inner wall of the centrifugal mesh cylinder can be sucked into the material suction pipe through the material suction hole and finally enter the exhaust pipe. Eventually, the copolymer in the centrifugal mesh cylinder is discharged through the exhaust pipe following the air and can be collected by the collection box, thus realizing the collection of the copolymer.

[0025] 5. This device integrates multiple purification steps such as dissolution, precipitation, centrifugation, washing, and collection. It eliminates the need for multiple transfers of the precipitate, simplifies the operation process, significantly improves the purification efficiency, reduces the labor cost and time cost, and at the same time reduces the impurities that may be introduced during the transfer process, ensuring the purification quality.

[0026] The PFA material purification device of the present invention significantly improves the purification efficiency. Through an integrated design, it integrates the functions of dissolution, precipitation, centrifugation, and collection, avoiding multiple transfers of the precipitate, simplifying the operation. The purification mixing component realizes the up-and-down floating stirring and uniform mixing of the material, and the shielding and discharging component is automatically processed, reducing manual intervention. Using Bernoulli's principle, it can discharge the copolymer and effectively clean the centrifugal mesh cylinder to avoid residue. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of a PFA material purification device described in an embodiment of the present invention.

[0028] Figure 2 It is a bottom view of a PFA material purification device described in an embodiment of the present invention.

[0029] Figure 3 It is a rear view of a PFA material purification device described in an embodiment of the present invention.

[0030] Figure 4 It is a schematic diagram of the driving mechanism in a PFA material purification device described in an embodiment of the present invention.

[0031] Figure 5 It is a schematic structural diagram of the spring in a PFA material purification device described in an embodiment of the present invention.

[0032] Figure 6 It is a schematic diagram of the covering cylinder in a PFA material purification device described in an embodiment of the present invention.

[0033] Figure 7 It is a schematic structural diagram of the internal disassembly of the centrifugal mesh cylinder in a PFA material purification device described in an embodiment of the present invention.

[0034] In the above-mentioned drawings: 1 base, 2 outer shell, 3 horizontal plate, 4 air storage tank, 5 exhaust pipe, 6 material suction pipe, 7 pressure relief pipe, 8 pressure relief valve, 9 second one-way valve, 10 first piston cylinder, 11 branch pipe, 12 solenoid valve, 13 motor, 14 second piston cylinder, 15 rotating rod, 16 conveying pipe, 17 intake pipe, 18 first one-way valve, 19 mounting plate, 20 first bevel gear, 21 one-way bearing, 22 sleeve, 23 second bevel gear, 24 third bevel gear, 25 first gear, 26 vertical rod, 27 second gear, 28 circular plate, 29 connecting rod, 30 second sliding piston, 31 cross block, 32 spring, 33 first sliding piston, 34 driving rod, 35 centrifugal mesh cylinder, 36 material suction hole, 37 rectangular cylinder, 38 circulation hole, 39 rectangular piston, 40 reciprocating lead screw, 41 stirring cross bar, 42 stirring vertical bar, 43 collar, 44 vertical pipe, 45 covering cylinder. Detailed implementation mode

[0035] The technical solutions in the present invention will be further described below with reference to the drawings and embodiments.

[0036] As Figures 1-7 shown, an embodiment of the present invention provides a PFA material purification device, including:

[0037] A base 1, on which an outer shell 2 is installed;

[0038] A purification and mixing assembly; the purification and mixing assembly is installed on the base 1 and the outer shell 2, and when the purification and mixing assembly rotates forward, it can realize floating stirring of the material up and down and make the material circulate.

[0039] Further detailed explanation of the purification and mixing assembly: The purification and mixing assembly includes a sleeve 22 that penetrates through the bottom of the outer shell 2 and is rotatably connected thereto. The upper end of the sleeve 22 is fixed with a centrifugal mesh cylinder 35. The outer diameter of the upper end of the centrifugal mesh cylinder 35 is smaller than that of the lower end. The centrifugal mesh cylinder 35 is provided with mesh holes and is located at the lower part of the centrifugal mesh cylinder 35.

[0040] A rotating rod 15 is penetrated through the sleeve 22 and is rotatably connected thereto. The rotating rod 15 penetrates through the centrifugal mesh cylinder 35 and is rotatably connected thereto. The upper end of the rotating rod 15 is fixed with a rectangular cylinder 37. A plurality of circulation holes 38 are penetrated through the rectangular cylinder 37. A rectangular piston 39 is slidably connected inside the rectangular cylinder 37. The inner corners of the rectangular cylinder 37 are arc-shaped, and correspondingly, the outer wall corners of the rectangular piston 39 are arc-shaped, so that the two fit more closely and the sealing effect is good.

[0041] The upper end of the rectangular piston 39 is fixed with a vertical pipe 44. The upper end of the vertical pipe 44 is fixed with a collar 43. A reciprocating lead screw 40 is connected in cooperation inside the collar 43. A plurality of stirring cross bars 41 are fixed on the vertical pipe 44. A plurality of stirring vertical bars 42 are fixed at the bottom of the stirring cross bars 41. The solution can be mixed and stirred by the stirring cross bars 41 and the stirring vertical bars 42.

[0042] Further, it also includes a driving mechanism for driving the rotating rod 15 and the sleeve 22 to rotate. The driving mechanism includes a mounting plate 19 installed at the bottom of the outer shell 2. A motor 13 is installed on the mounting plate 19. The output end of the motor 13 is fixedly connected with a first bevel gear 20. A one-way bearing 21 is fixed on the sleeve 22. A second bevel gear 23 is fixed on the one-way bearing 21. A third bevel gear 24 is fixed on the rotating rod 15. The first bevel gear 20 meshes with the second bevel gear 23 and the third bevel gear 24.

[0043] A shielding component installed on the outer shell 2; the shielding component can shield the purification and mixing component during forward rotation, and perform centrifugal treatment on the material when the purification and mixing component rotates in reverse. The shielding component can move upward.

[0044] A further detailed explanation of the shielding component: The shielding component includes a cross plate 3 fixed on the outer shell 2. A first piston cylinder 10 fixedly connected thereto is provided through the cross plate 3. A first sliding piston 33 is slidably connected in the first piston cylinder 10. A cross block 31 is fixedly connected to the first piston cylinder 10. A spring 32 is fixed on the cross block 31 and the first sliding piston 33. The bottom of the first sliding piston 33 is fixedly connected with a driving rod 34. The driving rod 34 passes through the first piston cylinder 10 and is slidably connected thereto. The bottom of the driving rod 34 is fixedly connected with a covering cylinder 45. The covering cylinder 45 is fixedly connected with a reciprocating lead screw 40. The covering cylinder 45 is arranged outside the centrifugal mesh cylinder 35.

[0045] A discharging component installed on the outer shell 2; the discharging component can discharge the purified material located in the purification and mixing component. The discharging component includes an air storage tank 4 installed on the cross plate 3. A pressure relief pipe 7 is installed on the air storage tank 4. A pressure relief valve 8 is installed on the pressure relief pipe 7; An exhaust pipe 5 is installed on the air storage tank 4. An electromagnetic valve 12 is installed on the exhaust pipe 5. The bottom of the exhaust pipe 5 is installed with a suction pipe 6. The suction pipe 6 passes through the cross plate 3 and the covering cylinder 45 and is slidably connected thereto. A suction hole 36 opposite to the centrifugal mesh cylinder 35 is provided through the suction pipe 6.

[0046] Further, it also includes a gas supply mechanism. The gas supply mechanism includes a second piston cylinder 14 installed on the inner wall of the base 1. A second sliding piston 30 is slidably connected in the second piston cylinder 14. The bottom of the outer shell 2 is rotatably connected with a vertical rod 26. A first gear 25 is fixed on the sleeve 22. A second gear 27 is fixed on the vertical rod 26. The first gear 25 meshes with the second gear 27. The bottom of the vertical rod 26 is fixedly connected with a circular plate 28. The bottom of the circular plate 28 is eccentrically hinged with a connecting rod 29. The connecting rod 29 is hinged with the second sliding piston 30. An air inlet pipe 17 is installed on the second piston cylinder 14. A first one-way valve 18 is installed on the air inlet pipe 17. The first one-way valve 18 only allows air to enter the second piston cylinder 14 through the air inlet pipe 17.

[0047] A delivery pipe 16 is installed on the second piston cylinder 14. The delivery pipe 16 is connected to the gas storage tank 4. A branch pipe 11 is installed on the delivery pipe 16. The branch pipe 11 is connected to the first piston cylinder 10 and is located below the first sliding piston 33. Second one-way valves 9 are installed on both the branch pipe 11 and the delivery pipe 16. The second one-way valves 9 only allow air to flow through the delivery pipe 16 into the gas storage tank 4 and into the branch pipe 11.

[0048] Among them, a through groove is provided through the covering cylinder 45 for adding materials.

[0049] During use, the staff adds perfluoropropyl vinyl ether-tetrafluoroethylene copolymer particles into the centrifugal mesh cylinder 35 through the through groove, and then adds perfluorodimethylcyclobutane into the centrifugal mesh cylinder 35 through the through groove. At this time, the centrifugal mesh cylinder 35 is blocked by the covering cylinder 45. Therefore, the periphery of the centrifugal mesh cylinder 35 is in a sealed state, so that liquid leakage will not occur.

[0050] The staff starts the motor 13 to rotate forward. The motor 13 drives the first bevel gear 20 to rotate. The first bevel gear 20 drives the second bevel gear 23 and the third bevel gear 24 to rotate. Under the action of the one-way bearing 21, relative rotation occurs between the second bevel gear 23 and the sleeve 22, that is, the sleeve 22 remains stationary, and further the centrifugal mesh cylinder 35 remains stationary.

[0051] The third bevel gear 24 drives the rotating rod 15 to rotate. The rotating rod 15 drives the rectangular cylinder 37 to rotate. The rectangular cylinder 37 drives the rectangular piston 39 to rotate, thereby driving the vertical pipe 44 and the collar 43 to rotate. Since the reciprocating lead screw 40 is fixed on the covering cylinder 45 and cannot rotate, when the rotating rod 15 rotates, the collar 43 moves up and down reciprocally on the reciprocating lead screw 40, that is, the collar 43 rotates and moves up and down reciprocally, thereby driving the stirring cross bar 41 and the stirring vertical bar 42 to rotate and move up and down. By rotating the stirring cross bar 41 and the stirring vertical bar 42, the perfluoropropyl vinyl ether-tetrafluoroethylene copolymer particles and perfluorodimethylcyclobutane can be fully mixed, and the perfluoropropyl vinyl ether-tetrafluoroethylene copolymer particles can be quickly dissolved in perfluorodimethylcyclobutane and mixed evenly.

[0052] Then, methanol is added into the centrifugal mesh cylinder 35 through the through groove. Methanol can reduce the solubility of the copolymer in the mixed solvent, so that it precipitates; this step helps to further remove impurities and improve the purity of the copolymer, so that the copolymer can be in the form of precipitation in the liquid; above, the motor 13 continues to work, which can fully mix methanol with the mixed solution and is beneficial to the precipitation of the copolymer.

[0053] Next, the staff starts the motor 13 to reverse. The reverse rotation of the motor 13 drives the first bevel gear 20 to rotate, which in turn drives the second bevel gear 23 and the third bevel gear 24 to rotate. Under the drive of the one-way bearing 21, the sleeve 22 rotates, and the rotation of the sleeve 22 drives the centrifugal mesh cylinder 35 to rotate;

[0054] The rotation of the sleeve 22 drives the first gear 25 to rotate. The rotation of the first gear 25 drives the second gear 27 to rotate. The rotation of the second gear 27 drives the vertical rod 26 and the circular plate 28 to rotate. The rotation of the circular plate 28 drives the connecting rod 29 and the second sliding piston 30 to reciprocate. When the second sliding piston 30 moves closer to the motor 13, it can suck the external air into the second piston cylinder 14 through the intake pipe 17. When the second sliding piston 30 moves away from the motor 13, the air in the second piston cylinder 14 can be squeezed into the delivery pipe 16. The air is delivered to the branch pipe 11 through the delivery pipe 16 and then to the first piston cylinder 10 through the branch pipe 11. The air in the first piston cylinder 10 increases, thus driving the first sliding piston 33 to move upward. The upward movement of the first sliding piston 33 drives the drive rod 34 and the covering cylinder 45 to move upward. At this time, the covering cylinder 45 moves upward without abutting against the centrifugal mesh cylinder 35, so that the mesh holes on the centrifugal mesh cylinder 35 are no longer blocked and limited, and the friction between the two is also reduced;

[0055] The rotation of the centrifugal mesh cylinder 35 can separate the precipitate from the liquid;

[0056] During this process, when the air in the first piston cylinder 10 reaches a certain level, the spring 32 is squeezed to the maximum extent. Therefore, the air no longer flows to the branch pipe 11, and the air is delivered to the air storage tank 4 through the delivery pipe 16. When the pressure in the air storage tank 4 is greater than the threshold value of the pressure relief valve 8, the pressure relief valve 8 opens and the air can be discharged through the pressure relief pipe 7;

[0057] Among them, an upward short pipe is installed on the branch pipe 11, and a solenoid valve 12 can be installed on the short pipe. After centrifugation is completed, the solenoid valve 12 on the short pipe is opened, and the motor 13 stops working. Under the action of the spring 32, the first sliding piston 33 moves downward, and the internal air can be squeezed out and finally reset, so as to realize the reset of the drive rod 34 and the covering cylinder 45, and the covering cylinder 45 covers the centrifugal mesh cylinder 35 again.

[0058] The staff can inject ionic water into the centrifugal mesh cylinder 35 through the through groove, start the motor 13 to rotate forward, and the copolymer and ionic water can be fully mixed and stirred as described above. The centrifuged copolymer is washed with ionic water. After the washing is completed, the motor 13 is reversed, so that the washed copolymer and ionic water can be separated, that is, the centrifugal mesh cylinder 35 is filled with the washed copolymer at this time;

[0059] At this time, the solenoid valve 12 on the exhaust pipe 5 is opened and the rotational speed of the motor 13 is reduced. Since air has been continuously supplied to the air storage tank 4 and its interior is in a high-pressure state, the high-pressure air is discharged through the exhaust pipe 5. When the high-speed flowing air passes above the suction pipe 6, the air flow rate above the suction pipe 6 is large and the pressure is small, while the air flow rate at the suction hole 36 is small and the pressure is large. Therefore, there is a pressure difference between the two (Bernoulli's principle). Thus, the copolymer located on the inner wall of the centrifugal mesh cylinder 35 can be sucked into the suction pipe 6 through the suction hole 36 and finally enter the exhaust pipe 5. Eventually, the copolymer in the centrifugal mesh cylinder 35 follows the air and is discharged through the exhaust pipe 5, and can be collected by the collection box, thereby realizing the collection of the copolymer;

[0060] Since the pressure at the suction hole 36 is negative, the copolymer on the centrifugal mesh cylinder 35 can be effectively cleaned.

[0061] The PFA material purification equipment of the present invention significantly improves the purification efficiency and simplifies the operation process. By integrating functions of dissolution, precipitation, centrifugation, and collection, it avoids the cumbersome steps of multiple transfers of precipitates in traditional methods. The purification and mixing component in the equipment realizes the up-and-down floating stirring and circulating flow of the material, ensuring the rapid dissolution and uniform mixing of copolymer particles in the solvent. The ingenious design of the shielding component and the discharging component enables the automation of the centrifugation and material collection processes, reducing manual intervention and improving the convenience and accuracy of operation. In addition, the discharging method using Bernoulli's principle effectively cleans the copolymer on the centrifugal mesh cylinder, avoiding the residue problem. The setting of the air supply mechanism provides a stable air source for the centrifugation and discharging processes, further enhancing the overall performance of the equipment. In summary, the present invention not only simplifies the purification process, but also significantly improves the purification efficiency and purity, providing strong support for the industrial production of PFA materials.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A PFA material purification device, characterized in that: include: A base (1), wherein a housing (2) is mounted on the base (1); Purify mixed components; The purification and mixing assembly is mounted on the base (1) and the housing (2), and the forward rotation of the purification and mixing assembly can achieve up and down floating and stirring of the material and enable the material to circulate; A shielding component mounted on the housing (2); the shielding component can shield the forward-rotating purification and mixing component, and the purification and mixing component centrifuges the material when the reverse rotation occurs, and the shielding component can move upward; A discharge assembly is mounted on the housing (2); the discharge assembly is capable of discharging the purified material located in the purification mixing assembly.

2. A PFA material purification device according to claim 1, characterized in that: in: The purification and mixing assembly comprises a sleeve (22) penetrating the bottom of the outer shell (2) and being rotatably connected thereto, a centrifugal net cylinder (35) being fixed at the upper end of the sleeve (22), a rotating rod (15) being provided in the sleeve (22) and being rotatably connected thereto, the rotating rod (15) penetrating the centrifugal net cylinder (35) and being rotatably connected thereto, a rectangular cylinder (37) being fixed at the upper end of the rotating rod (15), a plurality of circulation holes (38) being provided in the rectangular cylinder (37), a rectangular piston (39) being slidably connected in the rectangular cylinder (37), a vertical tube (44) being fixed at the upper end of the vertical tube (44), a sleeve ring (43) being fixed at the upper end of the vertical tube (44), a reciprocating screw rod (40) being cooperatively connected in the sleeve ring (43), a plurality of stirring cross rods (41) being fixed on the vertical tube (44), and a plurality of stirring vertical rods (42) being fixed at the bottom of the stirring cross rod (41).

3. A PFA material purification device according to claim 2, characterized in that: in: The invention also comprises a driving mechanism for driving the rotating rod (15) and the sleeve (22) to rotate, the driving mechanism comprising a mounting plate (19) mounted on the bottom of the housing (2), a motor (13) being mounted on the mounting plate (19), a first bevel gear (20) being fixedly connected to the output end of the motor (13), a one-way bearing (21) being fixed on the sleeve (22), a second bevel gear (23) being fixed on the one-way bearing (21), a third bevel gear (24) being fixed on the rotating rod (15), and the first bevel gear (20) being meshed with the second bevel gear (23) and the third bevel gear (24).

4. A PFA material purification device according to claim 1, characterized in that: in: The shielding assembly comprises a transverse plate (3) fixed on the outer shell (2), the transverse plate (3) being penetrated by a first piston cylinder (10) fixedly connected thereto, a first sliding piston (33) being slidably connected inside the first piston cylinder (10), a transverse block (31) being fixedly connected to the first piston cylinder (10), a spring (32) being fixedly connected to the transverse block (31) and the first sliding piston (33), a driving rod (34) being fixedly connected to the bottom of the first sliding piston (33), the driving rod (34) being penetrated by the first piston cylinder (10) and being slidably connected thereto, a covering cylinder (45) being fixedly connected to the bottom of the driving rod (34), the covering cylinder (45) being fixedly connected to the reciprocating screw rod (40), and the covering cylinder (45) being sleeved on the outside of the centrifugal net cylinder (35).

5. A PFA material purification device according to claim 4, characterized in that: in: The discharge assembly comprises an air storage box (4) mounted on a transverse plate (3), the air storage box (4) being equipped with an exhaust pipe (5), the exhaust pipe (5) being equipped with an electromagnetic valve (12), a suction pipe (6) being installed at the bottom of the exhaust pipe (5), the suction pipe (6) penetrating the transverse plate (3) and a covering cylinder (45) and being slidably connected thereto, and a suction hole (36) being penetrated through the suction pipe (6) and being opposite to the centrifugal net cylinder (35).

6. A PFA material purification device according to claim 5, characterized in that: in: The air supply mechanism also includes an air supply mechanism, which includes a second piston cylinder (14) mounted on the inner wall of the base (1), a second sliding piston (30) being slidably connected in the second piston cylinder (14), a vertical rod (26) being rotatably connected to the bottom of the housing (2), a first gear (25) being fixed on the sleeve (22), a second gear (27) being fixed on the vertical rod (26), the first gear (25) being meshed with the second gear (27), a circular plate (28) being fixedly connected to the bottom of the vertical rod (26), a connecting rod (29) being eccentrically hingedly connected to the bottom of the circular plate (28), and the The connecting rod (29) is hingedly connected to the second sliding piston (30); an air intake pipe (17) is installed on the second piston cylinder (14); a first one-way valve (18) is installed on the air intake pipe (17); a delivery pipe (16) is installed on the second piston cylinder (14); the delivery pipe (16) is connected to the air storage box (4); a branch pipe (11) is installed on the delivery pipe (16); the branch pipe (11) is connected to the first piston cylinder (10) and is located below the first sliding piston (33); and a second one-way valve (9) is installed on both the branch pipe (11) and the delivery pipe (16).

7. A PFA material purification device according to claim 1, characterized in that: in: A pressure relief pipe (7) is installed on the air storage box (4), and a pressure relief valve (8) is installed on the pressure relief pipe (7).

8. A PFA material purification device according to claim 1, characterized in that: in: The outer diameter of the upper end of the centrifugal net cylinder (35) is smaller than the outer diameter of the lower end, and the centrifugal net cylinder (35) is provided with mesh holes which are located at the lower end of the centrifugal net cylinder (35).

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