PTFE membrane preparation method capable of prolonging service life of membrane

Abstract

The invention discloses a PTFE membrane preparation method capable of prolonging the service life of a membrane, and relates to the field of hollow fiber membranes, the PTFE membrane preparation method comprises a mounting frame, the mounting frame further comprises an upper U-shaped frame, a lower U-shaped frame and four supporting rods, the upper U-shaped frame and the lower U-shaped frame are connected through the four supporting rods, a plurality of membranes are arranged in the mounting frame, the upper side and the lower side of each membrane are connected with mounting blocks, and the mounting blocks are connected with the upper U-shaped frame and the lower U-shaped frame. The top of the upper U-shaped frame is connected with a supporting plate, the top of the supporting plate is provided with a double-shaft motor, and the bottom of the double-shaft motor is connected with a motor mounting base. A double-shaft motor is used for driving two driving rods to rotate, the driving rods drive first bevel gears to rotate, the first bevel gears drive second bevel gears to rotate, the second bevel gears drive rotating shafts to rotate, the rotating shafts drive threaded blocks to move, the threaded blocks pull U-shaped moving plates, and the U-shaped moving plates pull multiple sets of scraping plates; impurities on the diaphragm are scraped off by utilizing the multiple groups of scrapers, so that the service life of the diaphragm can be prolonged.

Description

Technical Field

[0001] The present invention relates to the field of hollow fiber membranes, and particularly to a method for preparing a PTFE membrane for extending the service life of the membrane. Background Art

[0002] Hollow fiber membrane modules are mainly applied to sewage treatment in fields such as municipal, power, steel, petrochemical, textile, and food. Currently, when using hollow fiber membrane modules to treat sewage, impurities in the sewage adhere to the surface of the membrane filaments, and the filtered water is led out for collection. After a period of accumulation on the membrane filaments, there are many impurities attached to their surfaces, and it is necessary to disassemble and clean them, and the cleaning cycle is short.

[0003] Therefore, it is very necessary to invent a method for preparing a PTFE membrane for extending the service life of the membrane to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for preparing a PTFE membrane for extending the service life of the membrane to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A method for preparing a PTFE membrane for extending the service life of the membrane, including an installation frame, the installation frame further includes an upper U-shaped frame, a lower U-shaped frame, and four support rods. The upper U-shaped frame and the lower U-shaped frame are connected by four support rods. A plurality of membrane sheets are arranged inside the installation frame. Installation blocks are connected to both the upper and lower sides of each membrane sheet. A support plate is connected to the top of the upper U-shaped frame. A double-shaft motor is arranged on the top of the support plate. The bottom of the double-shaft motor is connected to a motor mounting seat, and the motor mounting seat is connected to the support plate by bolts. Both output ends of the double-shaft motor are connected to drive rods through couplings. The other end of the drive rod is connected to a first bevel gear. Rotating shafts are connected to both longitudinal parts of the upper U-shaped frame and the lower U-shaped frame. A reciprocating thread is arranged on the outer wall of the rotating shaft. The top end of the rotating shaft passes through the support plate and is connected to a second bevel gear. The second bevel gear meshes with the first bevel gear. A threaded block is connected to the outer wall of the rotating shaft. A U-shaped moving plate is jointly connected between the two threaded blocks. A plurality of groups of scraping plates are arranged on the front side of the U-shaped moving plate, and each group of scraping plates consists of two.

[0006] Preferably, insertion tubes are connected to both the front and rear sides of the installation block. First insertion slots corresponding to the insertion tubes are respectively opened on the front sides of the transverse parts of the upper U-shaped frame and the lower U-shaped frame. Sealing plates are respectively arranged on the front sides of the upper U-shaped frame and the lower U-shaped frame. The two sealing plates are respectively connected to the front ends of the longitudinal parts of the upper U-shaped frame and the lower U-shaped frame by bolts. Second insertion slots corresponding to the insertion tubes are opened on the rear sides of the sealing plates.

[0007] Preferably, a stabilizing cylinder is connected to the top of the support plate, a bearing is connected inside the stabilizing cylinder, and the inner wall of the bearing is connected to the outer wall of the driving rod.

[0008] Preferably, sliding blocks are connected to both the front and rear sides of the threaded block, and sliding grooves corresponding to the sliding blocks are formed in the side wall of the support rod.

[0009] The technical effects and advantages of the present invention: By using a dual-axis motor to drive two driving rods to rotate, the driving rods drive the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the rotating shaft to rotate, the rotating shaft drives the threaded block to move, the threaded block pulls the U-shaped moving plate, and the U-shaped moving plate pulls multiple sets of scraping plates. The impurities on the diaphragm are scraped off by the multiple sets of scraping plates, thereby extending the service life of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 is a schematic cross-sectional structure diagram; Figure 3 is a schematic diagram of the structure of the mounting frame of the present invention; Figure 4 For the present invention Figure 1 is a schematic top view structure diagram; Figure 5 is a schematic top view structure diagram of the U-shaped moving plate and the scraping plate of the present invention; Figure 6 For the present invention Figure 2 is an enlarged structure diagram of part A of the present invention; Figure 7 For the present invention Figure 2 is an enlarged structure diagram of part B of the present invention.

[0011] In the figure: 1, mounting frame; 101, upper U-shaped frame; 102, lower U-shaped frame; 103, support rod; 2, diaphragm; 3, mounting block; 4, support plate; 5, dual-axis motor; 6, motor mounting seat; 7, driving rod; 8, first bevel gear; 9, rotating shaft; 10, second bevel gear; 11, threaded block; 12, U-shaped moving plate; 13, scraping plate; 14, insertion tube; 15, sealing plate; 16, stabilizing cylinder; 17, sliding block. DETAILED DESCRIPTION OF THE INVENTION

[0012] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0013] The present invention provides a method for preparing a PTFE membrane for extending the service life of the membrane as Figures 1-7 shown, including an installation frame 1. The installation frame 1 further includes an upper U-shaped frame 101, a lower U-shaped frame 102 and four support rods 103. The upper U-shaped frame 101 and the lower U-shaped frame 102 are connected by four support rods 103. A plurality of membrane sheets 2 are arranged in the installation frame 1. The membrane sheets 2 are composed of a plurality of membrane filaments, and the membrane filaments are made of a super-wetting polytetrafluoroethylene membrane. The super-wetting polytetrafluoroethylene membrane is placed in ethanol and water, and silane is added to the ethanol and water. The ratio of V ethanol to V water is 4:1. Then, the super-wetting polytetrafluoroethylene membrane is placed in distilled water, and sodium alginate and polyvinyl alcohol are added to the distilled water. Finally, the super-wetting polytetrafluoroethylene membrane is placed in Cfe3+ = 0.1M to complete the reverse transfer and cross-linking surface treatment of the super-wetting polytetrafluoroethylene membrane. It is not easy for the super-wetting polytetrafluoroethylene membrane to fall off from the coating. Installation blocks 3 are connected to both the upper and lower sides of each membrane sheet 2. A support plate 4 is fixedly connected to the top of the upper U-shaped frame 101. A double-shaft motor 5 is arranged on the top of the support plate 4. A motor mounting seat 6 is fixedly connected to the bottom of the double-shaft motor 5. The motor mounting seat 6 is connected to the support plate 4 by bolts. Both output ends of the double-shaft motor 5 are fixedly connected to driving rods 7 through couplings. The other end of the driving rod 7 is fixedly connected to a first bevel gear 8. Rotating shafts 9 are connected in both longitudinal parts of the upper U-shaped frame 101 and the lower U-shaped frame 102. A reciprocating thread is arranged on the outer wall of the rotating shaft 9. The top end of the rotating shaft 9 passes through the support plate 4 and is fixedly connected to a second bevel gear 10. The second bevel gear 10 meshes with the first bevel gear 8. A threaded block 11 is threadedly connected to the outer wall of the rotating shaft 9. A U-shaped moving plate 12 is fixedly connected between the two threaded blocks 11. A plurality of groups of scraping plates 13 are arranged on the front side of the U-shaped moving plate 12. Each group of scraping plates 13 consists of two. Each group of membrane sheets 2 is respectively located within each group of scraping plates 13. By using the double-shaft motor 5 to drive the two driving rods 7 to rotate, the driving rods 7 drive the first bevel gear 8 to rotate, the first bevel gear 8 drives the second bevel gear 10 to rotate, the second bevel gear 10 drives the rotating shaft 9 to rotate, the rotating shaft 9 drives the threaded block 11 to move, the threaded block 11 pulls the U-shaped moving plate 12, and the U-shaped moving plate 12 pulls the plurality of groups of scraping plates 13. The impurities on the membrane sheets 2 are scraped off by using the plurality of groups of scraping plates 13, so that the service cycle of the membrane sheets 2 can be extended.

[0014] Both the front and rear sides of the mounting block 3 are connected with insertion tubes 14. First slots corresponding to the insertion tubes 14 are provided on the front sides of the transverse parts of the upper U-shaped frame 101 and the lower U-shaped frame 102. Sealing plates 15 are arranged on the front sides of the upper U-shaped frame 101 and the lower U-shaped frame 102. The two sealing plates 15 are respectively connected to the front ends of the longitudinal parts of the upper U-shaped frame 101 and the lower U-shaped frame 102 through bolts. Second slots corresponding to the insertion tubes 14 are provided on the rear sides of the sealing plates 15. And the mounting block 3 on the upper side is hollow and is interconnected with the hollow membrane filaments. The inner wall of the transverse part of the upper U-shaped frame 101 is also hollow. The mounting block 3 on the upper side is connected to the transverse part of the upper U-shaped frame 101 through the insertion tube 14, and a water outlet joint is connected to the top of the transverse part of the upper U-shaped frame 101, so that the water filtered by the membrane filaments can be led out for collection. By removing the bolts on the sealing plate 15 and taking off the sealing plate 15, and pulling each group of membrane sheets 2, the membrane sheets 2 can be disassembled and cleaned.

[0015] A stabilizing cylinder 16 is fixedly connected to the top of the support plate 4. A bearing is connected inside the stabilizing cylinder 16, and the inner wall of the bearing is fixedly connected to the outer wall of the driving rod 7, so that the driving rod 7 can be supported by the stabilizing cylinder 16, making the driving rod 7 more stable when rotating.

[0016] Sliders 17 are connected to both the front and rear sides of the threaded block 11, and sliding grooves corresponding to the sliders 17 are provided on the side wall of the support rod 103.

[0017] The working principle of the present invention: By using the double-shaft motor 5 to drive the two driving rods 7 to rotate, the driving rods 7 drive the first bevel gears 8 to rotate, the first bevel gears 8 drive the second bevel gears 10 to rotate, the second bevel gears 10 drive the rotating shaft 9 to rotate, the rotating shaft 9 drives the threaded block 11 to move, the threaded block 11 pulls the U-shaped moving plate 12, and the U-shaped moving plate 12 pulls multiple groups of scraping plates 13. The impurities on the membrane sheets 2 are scraped off by the multiple groups of scraping plates 13, so that the service life of the membrane sheets 2 can be prolonged. And by removing the bolts on the sealing plate 15, taking off the sealing plate 15, and pulling each group of membrane sheets 2, the membrane sheets 2 can be disassembled and cleaned.

[0018] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a PTFE membrane to extend the service life of the membrane, including an installation frame, the installation frame further includes an upper U-shaped frame, a lower U-shaped frame and four support rods, and the upper U-shaped frame and the lower U-shaped frame are connected by the four support rods, characterized in that: A plurality of diaphragms are arranged inside the installation frame. Installation blocks are connected to both the upper and lower sides of each diaphragm. A support plate is connected to the top of the upper U-shaped frame. A double-shaft motor is arranged on the top of the support plate. A motor mounting seat is connected to the bottom of the double-shaft motor. The motor mounting seat is connected to the support plate by bolts. Both output ends of the double-shaft motor are connected to drive rods through couplings. The other end of the drive rod is connected to a first bevel gear. Rotating shafts are connected to both longitudinal parts of the upper U-shaped frame and the lower U-shaped frame. A reciprocating thread is arranged on the outer wall of the rotating shaft. The top end of the rotating shaft passes through the support plate and is connected to a second bevel gear. The second bevel gear meshes with the first bevel gear. A threaded block is connected to the outer wall of the rotating shaft. A U-shaped moving plate is jointly connected between the two threaded blocks. A plurality of groups of scraping plates are arranged on the front side of the U-shaped moving plate. Each group of scraping plates consists of two scraping plates.

2. The preparation method of a PTFE membrane for prolonging the service life of the membrane according to claim 1, characterized in that: Insertion tubes are connected to both the front and rear sides of the installation block. First insertion slots corresponding to the insertion tubes are formed on the front sides of the transverse parts of the upper U-shaped frame and the lower U-shaped frame. Sealing plates are arranged on the front sides of the upper U-shaped frame and the lower U-shaped frame. The two sealing plates are respectively connected to the front ends of the longitudinal parts of the upper U-shaped frame and the lower U-shaped frame by bolts. Second insertion slots corresponding to the insertion tubes are formed on the rear sides of the sealing plates.

3. The method for preparing a PTFE membrane for extending the service life of the membrane according to claim 1, wherein: A stabilizing cylinder is connected to the top of the support plate. A bearing is connected inside the stabilizing cylinder, and the inner wall of the bearing is connected to the outer wall of the drive rod.

4. A method for preparing a PTFE membrane for extending the service life of the membrane according to claim 1, characterized in that: Sliding blocks are connected to both the front and rear sides of the threaded block. Sliding grooves corresponding to the sliding blocks are formed on the side wall of the support rod.

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