A PFA hollow fiber membrane coating device

Abstract

The utility model provides a kind of PFA hollow fiber membrane coating equipment, it is related to PFA hollow fiber membrane processing technical field, and it includes: vacuum coating machine body, the vacuum coating machine body lower end fixed support has base frame, the vacuum coating machine body vacuum chamber right side is provided with moving stage, the moving stage upper end is connected with the central shaft of hot-pressing guide roller by fixed plate frame, the central shaft of hot-pressing guide roller rear side is connected with motor by belt drive pulley, the hot-pressing guide roller front and rear end is connected with heat conducting oil heater by hot oil input hose and hot oil output hose respectively, the hot-pressing guide roller outer side end is compounded and is provided with heat exchange outer roller surface, oil passage is arranged between the hot-pressing guide roller and heat exchange outer roller surface, the hot-pressing guide roller left and right side is distributed with unwinding roller and winding roller.The utility model solves the problem that the existing technology causes PFA hollow fiber membrane coating local excessive heating or insufficient damage in winding due to the temperature difference between the two ends and the middle of hot-pressing roller caused by thermal inertia.

Description

Technical Field

[0001] This utility model relates to the field of PFA hollow fiber membrane processing technology, specifically to a PFA hollow fiber membrane coating equipment. Background Technology

[0002] PFA hollow fiber membrane is a triple-structured gas separation membrane composed of fluororesin, silicone resin, and plasma polymer. It has self-supporting properties. The coating equipment coats a very thin film onto the surface of the hollow fiber. A search revealed an existing technology (announcement number: CN201922331210.X) for hollow fiber membrane coating equipment. The document describes a method where "a film-feeding roller passes through both ends of a fixed frame, while the shafts of both the hot-press roller and the winding roller pass inside a support plate. The output of a motor drives the shaft of the winding roller, causing the film to wind in an S-shape through the hot-press roller for winding. The pressure between the hot-press roller and the fiber membrane keeps the fiber membrane taut during winding, resulting in a smooth surface finish, increased yield, and faster production efficiency." However, in this existing technology, the hot-press roller's thermal inertia causes a temperature difference between the two ends and the middle of the roller surface, leading to localized overheating or underheating damage to the PFA hollow fiber membrane during winding. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a PFA hollow fiber membrane coating equipment is provided to solve the problem that the thermal inertia of the hot press roller causes a temperature difference between the two ends and the middle of the roller surface, resulting in local overheating or underheating damage to the PFA hollow fiber membrane during winding.

[0004] To achieve the above objectives, a PFA hollow fiber membrane coating equipment is provided, comprising: a vacuum coating machine body, wherein a base frame is fixedly supported at the lower end of the vacuum coating machine body. A movable platform is provided on the right side of the vacuum chamber of the vacuum coating machine body. The upper end of the movable platform is connected to the central shaft of the hot-pressing guide roller through a fixed plate frame. The rear central shaft of the hot-pressing guide roller is connected to a motor through a belt drive wheel. The front and rear ends of the hot-pressing guide roller are respectively connected to heat transfer oil heaters through hot oil inlet hoses and hot oil outlet hoses. A heat exchange outer roller surface is provided on the outer end of the hot-pressing guide roller. An oil channel is provided between the hot-pressing guide roller and the heat exchange outer roller surface. Unwinding rollers and take-up rollers are distributed on the left and right sides of the hot-pressing guide roller.

[0005] Furthermore, a vacuum pump is provided on the upper surface of the vacuum coating machine body, and the vacuum pump is connected to the vacuum chamber inside the vacuum coating machine body through a vacuum tube.

[0006] Furthermore, hydraulic columns are installed on the front and rear sides of the vacuum coating machine body, and a moving table is connected to the right side of the hydraulic columns via a piston rod.

[0007] Furthermore, a support frame is fixed on the platform of the mobile platform, and the support frame is connected to the unwinding roller and the winding roller respectively through a motor shaft mechanism.

[0008] Furthermore, the front end shafts of the unwinding roller and the winding roller are sleeved and supported by bearing seats, which are fixed to the moving table by fastening bolts.

[0009] Furthermore, a limit plate is fixed to the rear roller surface of the unwinding roller and the winding roller, and a heat transfer oil heater and a hot oil delivery pump are provided on the surface of the base frame.

[0010] Furthermore, a hot oil delivery pump is connected to the surface of the hot oil output hose, and the hot oil input hose and the hot oil output hose are respectively connected to the upper inlet and outlet of the thermal oil heater.

[0011] Furthermore, a central shaft is welded to the front and rear of the hot-pressing guide roller, and the central shaft is connected to the hot oil inlet hose and the hot oil outlet hose respectively through a rotary joint.

[0012] The beneficial effects of this utility model are as follows: the PFA hollow fiber membrane coating equipment of this utility model utilizes the connection between the two ends of the inner channel of the hot-pressing guide roller and the heat transfer oil heater. The constant temperature hot oil is transported by the hot oil delivery pump and circulates in the oil channel inside the hot-pressing guide roller, so that the constant temperature hot oil exchanges heat with the heat exchange outer roller surface of the hot-pressing guide roller. This facilitates uniform heat distribution on the contact roller surface of the hot-pressing guide roller, replaces simple resistance wire heating, accelerates the heating response speed of the hot-pressing guide roller, and effectively avoids damage caused by local overheating or underheating of the PFA hollow fiber membrane coating wrapped on the roller surface, thus ensuring the coating processing quality of the PFA hollow fiber membrane coating equipment. Attached Figure Description

[0013] Figure 1 This is a front view of the PFA hollow fiber membrane coating equipment according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the winding mechanism according to an embodiment of the present utility model; Figure 3 This is a side view of a partial connection structure of the hot-pressing guide roller according to an embodiment of the present invention; Figure 4 This is a cross-sectional structural diagram of the hot-pressing guide roller according to an embodiment of the present invention.

[0014] In the diagram: 1. Vacuum coating machine body; 11. Vacuum pump; 12. Vacuum tube; 13. Hydraulic column; 14. Base frame; 2. Hot press guide roller; 21. Rotary joint; 22. Central shaft; 23. Belt drive pulley; 24. Motor; 25. Heat exchange outer roller surface; 26. Oil channel; 3. Moving table; 31. Fixed plate frame; 32. Support plate frame; 4. Unwinding roller; 41. Rewinding roller; 42. Limiting plate; 43. Bearing seat; 5. Thermal oil heater; 51. Hot oil inlet hose; 52. Hot oil outlet hose; 53. Hot oil transfer pump. Detailed Implementation

[0015] Reference Figures 1 to 4 As shown, this utility model provides a PFA hollow fiber membrane coating equipment, including: a vacuum coating machine body 1, with a base frame 14 fixedly supported at the lower end of the vacuum coating machine body 1. A movable stage 3 is provided on the right side of the vacuum chamber of the vacuum coating machine body 1. The upper end of the movable stage 3 is connected to the central shaft 22 of the hot pressing guide roller 2 via a fixed plate frame 31. The central shaft 22 on the rear side of the hot pressing guide roller 2 is connected to a motor 24 via a belt drive wheel 23. The front and rear ends of the hot pressing guide roller 2 are connected to heat transfer oil heaters 5 via hot oil inlet hose 51 and hot oil outlet hose 52, respectively. A heat exchange outer roller surface 25 is provided on the outer side of the hot pressing guide roller 2. An oil channel 26 is provided between the hot pressing guide roller 2 and the heat exchange outer roller surface 25. Unwinding rollers 4 and take-up rollers 41 are distributed on the left and right sides of the hot pressing guide roller 2.

[0016] When the moving stage 3 moves out of the vacuum coating machine body 1, and the vacuum coating machine body 1 performs PFA hollow fiber membrane coating processing (the specific coating working principle of the vacuum coating machine body 1 can be referred to in the comparative document CN201922331210.X, which will not be elaborated again), the hot oil delivery pump 53 delivers the hot oil heated to a certain temperature in the heat transfer oil heater 5 to the hot pressure guide roller 2 through the hot oil output hose 52, so that the hot oil is diverted from the oil channel 26 at the rear end of the hot pressure guide roller 2 to each branch channel, and then collected in the oil channel 26 at the front end and sent back to the heat transfer oil heater 5 through the hot oil input hose 51, thereby realizing the circulation heating and delivery of hot oil, so that the outer roller surface of the hot pressure guide roller 2 exchanges heat with the hot oil, and the heat distribution on the roller surface is uniform, effectively avoiding damage caused by local overheating or underheating of the PFA hollow fiber membrane coating wrapped on the roller surface.

[0017] In this embodiment, a vacuum pump 11 is installed on the upper surface of the vacuum coating machine body 1, and the vacuum pump 11 is connected to the vacuum chamber inside the vacuum coating machine body 1 through a vacuum tube 12. Hydraulic columns 13 are installed on the front and rear sides of the vacuum coating machine body 1, and a moving table 3 is connected to the right side of the hydraulic column 13 through a piston rod.

[0018] In a preferred embodiment, the vacuum pump 11 evacuates the vacuum chamber of the vacuum coating machine body 1 through the vacuum tube 12. The hydraulic column 13 can pull the moving table 3 to the left to seal and press it against the right end of the vacuum chamber of the vacuum coating machine body 1, ensuring the vacuum level of the vacuum chamber.

[0019] In this embodiment, a support frame 32 is fixed on the upper surface of the moving platform 3. The support frame 32 is connected to the unwinding roller 4 and the take-up roller 41 via a motor shaft mechanism. Bearing seats 43 are sleeved on the front end shafts of the unwinding roller 4 and the take-up roller 41, and the bearing seats 43 are fixed to the moving platform 3 by fastening bolts. Limiting discs 42 are fixed on the rear roller surfaces of the unwinding roller 4 and the take-up roller 41. A heat transfer oil heater 5 and a hot oil delivery pump 53 are provided on the surface of the base frame 14. The hot oil delivery pump 53 is connected to the surface of the hot oil output hose 52. The hot oil input hose 51 and the hot oil output hose 52 are respectively connected to the upper inlet and outlet of the heat transfer oil heater 5.

[0020] In a preferred embodiment, the bearing seats 43 at the front ends of the unwinding roller 4 and the take-up roller 41 are detachable, facilitating the insertion and removal of the PFA film before processing and the PFA hollow fiber film after coating. The unwinding roller 4 and the take-up roller 41 rotate at the same speed to unwind and rewind the film material during the coating process. The heat transfer oil heater 5 facilitates heating the high-quality oil inside to the temperature required for coating. The heated oil is pumped into the oil channel 26 inside the hot-pressing guide roller 2 by the hot oil delivery pump 53, and then flows out from the front end of the oil channel 26. The circulating hot oil exchanges heat with the heat exchange outer roller surface 25 of the hot-pressing guide roller 2, which facilitates uniform heat distribution on the contact roller surface of the hot-pressing guide roller 2, replacing simple resistance wire heating and accelerating the heating response speed of the hot-pressing guide roller 2. The hot oil inlet hose 51 and the hot oil outlet hose 52 pass through the moving table 3 and are connected to the hot-pressing guide roller 2, and both the hot oil inlet hose 51 and the hot oil outlet hose 52 have heat insulation treatment on their surfaces.

[0021] In this embodiment, a central shaft 22 is welded to the front and back of the hot-pressing guide roller 2. The central shaft 22 is connected to the hot oil inlet hose 51 and the hot oil outlet hose 52 respectively through a rotary joint 21.

[0022] In a preferred embodiment, the oil channel 26 between the hot-pressing guide roller 2 and the heat exchange outer roller surface 25 has a "general-sub-general" structure. The oil first enters the hot-pressing guide roller 2 from the rear end of the oil channel 26, and then exchanges heat with the heat exchange outer roller surface 25 through the evenly distributed sub-channels. After heat exchange, the oil is collected and discharged from the front end of the oil channel 26, so that the hot oil can flow evenly on the heat exchange outer roller surface 25.

[0023] This utility model of PFA hollow fiber membrane coating equipment effectively solves the problem in the prior art where the temperature difference between the two ends and the middle of the hot press roller due to thermal inertia causes local overheating or underheating damage to the PFA hollow fiber membrane during winding. It facilitates uniform heat distribution on the contact roller surface of the hot press roller, replacing simple resistance wire heating, accelerating the heating response speed of the hot press roller, effectively avoiding local overheating or underheating damage to the PFA hollow fiber membrane wrapped on the roller surface, ensuring the coating processing quality of the PFA hollow fiber membrane coating equipment, and is applicable to PFA hollow fiber membrane coating equipment.

Claims

1. A PFA hollow fiber membrane coating apparatus comprising: The vacuum coating machine body (1) has a base frame (14) fixedly supported at its lower end, characterized in that: A movable stage (3) is provided on the right side of the vacuum chamber of the vacuum coating machine body (1). The upper end of the movable stage (3) is connected to the central shaft (22) of the hot pressing guide roller (2) through a fixed plate frame (31). The rear central shaft (22) of the hot pressing guide roller (2) is connected to a motor (24) through a belt drive wheel (23). The front and rear ends of the hot pressing guide roller (2) are connected to a heat transfer oil heater (5) through a hot oil input hose (51) and a hot oil output hose (52) respectively. A heat exchange outer roller surface (25) is provided on the outer side of the hot pressing guide roller (2). An oil channel (26) is provided between the hot pressing guide roller (2) and the heat exchange outer roller surface (25). An unwinding roller (4) and a rewinding roller (41) are distributed on the left and right sides of the hot pressing guide roller (2).

2. The PFA hollow fiber membrane coating equipment according to claim 1, characterized in that, A vacuum pump (11) is provided on the upper end face of the vacuum coating machine body (1), and the vacuum pump (11) is connected to the vacuum chamber inside the vacuum coating machine body (1) through a vacuum tube (12).

3. The PFA hollow fiber membrane coating equipment according to claim 1, characterized in that, The vacuum coating machine body (1) is equipped with hydraulic columns (13) on the front and rear sides, and a moving table (3) is connected to the right side of the hydraulic column (13) via a piston rod.

4. The PFA hollow fiber membrane coating apparatus according to claim 1, wherein The upper surface of the mobile platform (3) is fixed with a support plate frame (32), and the support plate frame (32) is connected to the unwinding roller (4) and the winding roller (41) respectively through a motor shaft mechanism.

5. The PFA hollow fiber membrane coating apparatus according to claim 1, wherein The front end shafts of the unwinding roller (4) and the winding roller (41) are supported by bearing seats (43), and the bearing seats (43) are fixed to the moving table (3) by fastening bolts.

6. The PFA hollow fiber membrane coating equipment according to claim 1, characterized in that, Limiting discs (42) are fixed on the rear roller surfaces of the unwinding roller (4) and the winding roller (41), and a heat transfer oil heater (5) and a hot oil delivery pump (53) are provided on the surface of the base frame (14).

7. The PFA hollow fiber membrane coating equipment according to claim 1, characterized in that, The surface of the hot oil output hose (52) is connected to a hot oil transfer pump (53), and the hot oil input hose (51) and the hot oil output hose (52) are respectively connected to the upper inlet and outlet of the heat transfer oil heater (5).

8. The PFA hollow fiber membrane coating apparatus according to claim 1, wherein The hot-pressing guide roller (2) has a central shaft (22) welded to its front and back. The central shaft (22) is connected to the hot oil inlet hose (51) and the hot oil outlet hose (52) respectively through a rotary joint (21).

Images