High-precision PPS / PTFE membrane filter material processing equipment and processing technology thereof

Abstract

The invention provides high-precision PPS / PTFE membrane filter material processing equipment and a processing technology thereof, and relates to the technical field, the high-precision PPS / PTFE membrane filter material processing equipment comprises a rack, a lifting guide rod is slidably connected to the rack, a needling mechanism is fixedly mounted at the lower end of the lifting guide rod, and the needling mechanism comprises a needling beam plate, a sliding needle frame, an inner needle connecting rod, an outer needle cylinder and a bundling assembly; the sliding needle frame is connected to the needling beam plate in a sliding mode, a plurality of driving guide blocks are arranged on the lower side of the needling beam plate, a driving rack is arranged on the lower side of an extending block, a driving gear is arranged at the upper end of an inner needle connecting rod, and a wedge-shaped sliding block is rotationally connected to the upper side of the driving gear; the collecting assembly comprises a collecting support, a collecting worm, a collecting worm gear, a transmission chain and a collecting wheel, the outer needle cylinder is provided with a communicating sliding groove, and the collecting wheel protrudes out of the outer wall of the outer needle cylinder. According to the invention, the bundling assembly can be used for bundling and filling the puncture hole, so that the purpose of needling without holes is achieved, and the filtering efficiency is ensured.

Description

Technical Field

[0001] The invention relates to the technical field, and in particular to high-precision PPS / PTFE coated filter material processing equipment and a processing technology thereof. Background Art

[0002] Dust particles are one of the main pollutants in the atmospheric environment. Dust from industrial emissions is mainly treated by bag dust removal technology. There are many types of bag dust collectors on the market, and the applicable working conditions are also different. The most popular one at present is the high-temperature resistant needle-punched felt filter material. The PPS / PTFE coated filter material has good chemical stability, high temperature stability and corrosion resistance. It can be used to filter high temperature, strong acid, strong alkali and other corrosive media, and has excellent wear resistance and aging resistance. It can be used for a long time without being easily damaged, thereby reducing the cost of filter material replacement and maintenance.

[0003] In the processing of PPS / PTFE coated filter materials, in order to meet certain performance requirements such as breaking strength, breaking elongation, and thermal yield, PPS and PTFE fibers are mixed in a certain proportion and laid into a PPS / PTFE fiber mesh, and the PPS / PTFE fiber mesh is needle-punched. PPS and PTFE fibers are mixed in a certain proportion to prepare PPS / PTFE composite needle-punched filter materials, which are then impregnated and coated. The surface of the composite filter material is modified by the impregnation treatment to greatly reduce the pore size of the filter material surface, and then PTFE microporous coating is performed on the surface of the impregnated filter material to further improve the filtration performance of the composite filter material.

[0004] However, in the needle punching process, the PPS / PTFE fiber mesh is repeatedly punctured with a barbed needle on the edge. When the barbs pass through the PPS / PTFE fiber mesh, the fibers between the PPS / PTFE fiber mesh are intertwined. Due to the friction and cohesion between the fibers, the originally fluffy fiber mesh is compressed. However, in the process of the needle piercing into and withdrawing from the PPS / PTFE fiber mesh, a larger puncture hole will be left on the PPS / PTFE fiber mesh, resulting in uneven density distribution of the needle-punched felt filter material. After impregnation and coating treatment, and after impregnation and modification with ANF aramid nanofiber dispersion, the gaps at the puncture hole positions are difficult to meet the impregnation modification requirements, resulting in a decrease in the filtration efficiency of the coated filter material. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides a high-precision PPS / PTFE coated filter material processing equipment and a processing technology thereof, which solves the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A high-precision PPS / PTFE coated filter material processing equipment, which includes, from front to back, a loosening machine, a cotton feeding machine, a carding machine, a web laying machine, a needle punching device, a heat setting machine, a singeing machine, an impregnation tank and a winding roller. The needle punching device includes a frame, a driving motor is installed on the frame, an eccentric wheel is sleeved on the output end of the driving motor, a driving swing rod is rotatably connected to the front axis of the eccentric wheel, a lifting guide rod is hinged at the lower end of the driving swing rod, and the lifting guide rod is vertically slidably connected to the frame. The lower end of the lifting guide rod is fixedly installed with an acupuncture mechanism, and the acupuncture mechanism includes a acupuncture beam, a sliding needle frame, an inner needle connecting rod, an outer needle cylinder and a gathering assembly. The acupuncture beam is fixed to the lower end of the lifting guide rod, and the sliding beam is slidably connected to the lower side of the acupuncture beam. The sliding needle frame is provided with a plurality of fixed needle holes, and the inner needle connecting rod passes through the fixed needle holes. The upper end of the outer needle cylinder is fixed to the lower side of the sliding needle frame, and the inner needle connecting rod is slidably passed through the outer needle cylinder, and the outer wall of the outer needle cylinder is provided with a plurality of barb grooves.

[0010] Preferably, a horizontal guide rail is provided on the lower side of the acupuncture beam, and a guide slider is provided on the upper side of the sliding needle holder, and the guide slider is slidably installed on the horizontal guide rail. The cross-section of the sliding needle holder is set in a "J" shape, and the guide slider is arranged on the upper side of the middle part of the sliding needle holder. Several fixed needle holes are evenly distributed on the left and right sides of the sliding needle holder, and a translation nut is provided on the lower side of the middle part of the sliding needle holder. A translation motor is fixed to the lower side of one end of the acupuncture beam, and a translation screw is connected to the output end of the translation motor, and the translation screw is threadedly matched with the translation nut.

[0011] Preferably, a plurality of driving guide blocks are arranged at intervals above the fixed needle holes on both sides of the lower side of the needling beam plate, a lifting slope is arranged on one side of the driving guide block, the upper end of the lifting slope is flush with the lower side surface of the needling beam plate, an extension block is fixed to the side wall of the driving guide block, and a driving rack is arranged on the lower side of the extension block.

[0012] Preferably, a driving gear is provided at the upper end of the inner needle connecting rod, and a wedge-shaped slider is rotatably connected to the upper side of the driving gear. The cross-section of the wedge-shaped slider is a right-angled trapezoid, and the front side of the wedge-shaped slider is arranged as a sliding inclined plane parallel to the lifting inclined plane. A guide ridge is integrally formed on the top of the wedge-shaped slider, and a connecting guide groove is provided on the needle-piercing beam plate and the driving guide block, and the guide ridge is slidably connected in the guide groove.

[0013] Preferably, the focusing assembly includes a focusing bracket, a focusing worm, a focusing worm wheel, a transmission chain and a focusing wheel. A limiting slot is provided at the upper end of the focusing bracket, a limiting outer ring is integrally formed and fixed to the middle outer edge of the inner needle connecting rod, the focusing bracket is rotatably connected to the limiting outer ring, the focusing worm is fixed to the lower end of the inner needle connecting rod, the focusing worm wheel is rotatably connected to the middle part of the focusing bracket, the focusing worm and the focusing worm wheel are meshed with each other, and the focusing wheel is rotatably connected to the lower end of the focusing bracket, coaxial sprockets are integrally formed on the front and rear sides of the focusing worm wheel and the focusing wheel, and the transmission chain is wound around the coaxial sprockets of the focusing worm wheel and the focusing wheel.

[0014] Preferably, the outer syringe includes an integrally formed syringe portion and a needle tip portion, the outer wall cross-section of the syringe portion is triangular, the barb grooves are evenly staggered on the outer wall of the syringe portion, the needle tip portion is configured to be conical, a connecting slide groove is provided at the lower portion of the syringe portion and the upper portion of the needle tip portion, the focusing wheel slides through the connecting slide groove, the outer edge of the focusing wheel is flush with the outer edge of the syringe portion, and a plurality of focusing grooves are provided at the outer edge of the focusing wheel.

[0015] Preferably, a needling plate is fixed on the frame, a plurality of needling holes are formed on the needling plate, the needling holes are arranged as long strip holes, the width of the needling holes is equal to the outer diameter of the outer syringe, the length of the needling holes is greater than the outer diameter of the outer syringe and is parallel to the extension direction of the translation screw.

[0016] Preferably, a return spring is sleeved on the upper end of the outer wall of the inner needle connecting rod, and two ends of the return spring are respectively abutted between the driving gear and the sliding needle frame.

[0017] A high-precision PPS / PTFE coated filter material processing technology comprises the following steps:

[0018] S1. Select nano PPS fibers and nano PTFE fibers, seal the nano PPS fibers and nano PTFE fibers with an electrostatic agent for 48 hours, and then loosen the nano PPS fibers and nano PTFE fibers;

[0019] S2, feeding the nano PPS fibers and nano PTFE fibers obtained by the step S1 into a carding machine to form a smooth and uniform wool web by mixing the PPS fibers and PTFE fibers in a ratio of 3 / 7, 4 / 6, 5 / 5, 6 / 4 or 7 / 3 through a cotton feeder;

[0020] S3, select PTFE mesh as the base fabric, and evenly stack the wool mesh of step S2 on the upper and lower cottons of the PTFE mesh base fabric to make a PPS / PTFE composite felt material;

[0021] S4, subjecting the PPS / PTFE composite felt material obtained in step S3 to a needle-punching treatment through multiple needle-punching devices to obtain a non-porous PPS / PTFE needle-punched filter material;

[0022] S5, subjecting the non-porous PPS / PTFE needle-punched filter material obtained in step S4 to heat setting and singeing calendering processing in a heat setting machine and a singeing machine;

[0023] S6, introducing the non-porous PPS / PTFE needle-punched filter material processed in step S5 into an immersion tank filled with 0.5 mg / mL, 1 mg / mL or 2 mg / mL ANF dispersion to obtain a PPS / PTFE membrane filter material;

[0024] S7, rolling up the film-coated filter material obtained in step S6 on a winding roller.

[0025] (III) Beneficial effects

[0026] The present invention provides a high-precision PPS / PTFE coated filter material processing equipment and a processing technology thereof. It has the following beneficial effects:

[0027] 1. In the present invention, the driving motor drives the needling mechanism to realize up and down reciprocating motion through the eccentric wheel, and the translation motor rotates to realize the sliding needle holder to slide left and right on the needling beam plate, thereby realizing an elliptical motion trajectory for the movement of the outer needle cylinder, which can move along the direction of travel while needling the PPS / PTFE composite felt material, thereby avoiding the needling holes being pulled larger due to pulling of the PPS / PTFE composite felt material during the needling process, reducing the diameter of the needling holes, and keeping the needling holes compatible with the size of the tightening wheel.

[0028] 2. In the present invention, under the action of the translation motor, the sliding inclined surface of the wedge-shaped slider and the lifting inclined surface of the driving guide block slide against each other, and the contacting focusing wheel slides up and down on the connecting slide groove and protrudes the needle tip, and then the driving gear is rotated through the driving rack, so that the focusing wheel rotates downward, and the internal fibers of the PPS / PTFE coated filter material are hooked through the focusing groove, so that the fibers are pushed downward and inward, and the puncture holes are focused and blocked, so as to obtain a non-porous PPS / PTFE needle-punctured filter material, thereby avoiding the increase of the gaps caused by the puncture holes and the resulting reduction in filtration efficiency.

[0029] 3. After the needle-punching mechanism is separated from the PPS / PTFE needle-punched filter material, the driving rack drives the driving gear to rotate in the opposite direction, and the contraction wheel withdraws and releases the hooked PPS / PTFE needle-punched filter material fibers to avoid blockage caused by the PPS / PTFE needle-punched filter material fibers remaining in the contraction groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an acupuncture device of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the acupuncture device of the present invention;

[0032] Figure 3 is an exploded view of the acupuncture device of the present invention;

[0033] Figure 4 It is a schematic diagram of the structure of the needle-punched beam-slab in the present invention;

[0034] Figure 5 It is a structural schematic diagram of the sliding needle holder in the present invention;

[0035] Figure 6 It is a schematic diagram of the structure of the inner needle connecting rod and the outer needle cylinder in the present invention;

[0036] Figure 7 for Figure 6 A partial enlarged view of point A in the middle.

[0037] In the figure: 1. frame; 2. driving motor; 3. eccentric wheel; 4. driving rocker; 5. lifting guide rod; 6. guide beam; 7. needling plate; 8. needling hole; 9. needling beam plate; 10. sliding needle frame; 11. inner needle connecting rod; 12. outer syringe; 121. syringe part; 122. needle tip part; 13. translation motor; 14. translation screw; 15. translation nut; 16. return spring; 17. connecting slide groove; 18. driving guide block; 19. wedge-shaped slider; 20. driving rack; 21. driving gear; 22. guide convex strip; 23. limiting outer ring; 24. convergence bracket; 25. convergence worm; 26. convergence worm wheel; 27. transmission chain; 28. convergence wheel; 29. ​​coaxial sprocket. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] The embodiment of the present invention provides a high-precision PPS / PTFE coated filter material processing device and a processing technology thereof.

[0040] A high-precision PPS / PTFE coated filter material processing equipment comprises, from front to back, an opener, a cotton feeder, a carding machine, a web laying machine, a needle punching device, a heat setting machine, a singeing machine, an impregnation tank and a winding roller.

[0041] like Figure 1As shown, the acupuncture device includes a frame 1, a driving shaft seat is installed on the frame 1, a driving motor 2 is fixedly installed on the frame 1, the output end of the driving motor 2 is rotatably connected to the driving shaft seat, the output end of the driving motor 2 is sleeved with an eccentric wheel 3, the front axis of the eccentric wheel 3 is rotatably connected to a driving swing rod 4, the lower end of the driving swing rod 4 is hinged with a lifting guide rod 5, two parallel guide beams 6 are arranged on the frame 1, the lifting guide rod 5 is vertically slidably penetrated between the two guide beams 6, the lower end of the lifting guide rod 5 is fixedly installed with an acupuncture mechanism, and the machine A needling plate 7 is fixed on the frame 1, and a plurality of needling holes 8 are provided on the needling plate 7, and the needling holes 8 are arranged as long strip holes. A feeding port and a discharging port are provided on both sides of the frame 1. Through the above technical scheme, the rotation of the driving motor 2 will cause the eccentric wheel 3 eccentrically connected to the output end of the driving motor 2 to rotate eccentrically, and the driving rocker arm 4 connected to the axis of the eccentric wheel 3 can make the lifting guide rod 5 slide up and down only in the vertical direction under the limiting action of the guide beam 6, so as to realize the up and down reciprocating motion of the needling mechanism, and achieve the purpose of reciprocating puncture of PPS / PTFE needling filter material.

[0042] like Figure 2 , Figure 3 , Figure 5As shown, the acupuncture mechanism includes acupuncture beam 9, a sliding needle holder 10, an inner needle connecting rod 11, an outer needle cylinder 12 and a gathering assembly. The acupuncture beam 9 is fixed to the lower end of the lifting guide rod 5. A horizontal guide rail is arranged on the lower side of the acupuncture beam 9. A guide slider is arranged on the upper side of the sliding needle holder 10. The guide slider is slidably installed on the horizontal guide rail. The cross-section of the sliding needle holder 10 is arranged in a "J" shape. The guide slider is arranged on the upper middle side of the sliding needle holder 10. A plurality of fixed needle holes are evenly provided on the left and right sides of the sliding needle frame 10. A translation motor 13 is fixed to the lower side of one end of the acupuncture beam plate 9. A translation screw 14 is connected to the output end of the translation motor 13. A translation nut 15 is provided on the lower middle part of the sliding needle frame 10. The translation screw 14 is threadedly matched with the translation nut 15. A rotating piece is fixed to the acupuncture beam plate 9. The rotating piece is rotatably connected to the end of the translation screw 14. The outer needle cylinder 12 includes a The needle barrel portion 121 and the needle tip portion 122 are formed in a body, and a connecting flange is provided at the upper end of the needle barrel portion 121. The needle barrel portion 121 is fixed to the lower side of the sliding needle holder 10 through the connecting flange. A return spring 16 is sleeved on the upper end of the outer wall of the inner needle connecting rod 11. The two ends of the return spring 16 are respectively abutted between the driving gear and the sliding needle holder 10. The outer wall section of the needle barrel portion 121 is triangular, and a plurality of barbs are provided on the outer edges of the needle barrel portion 121. Groove, the barb grooves are evenly staggered and distributed on the three outer ridges of the outer wall of the syringe portion 121, the needle tip portion 122 is set to a cone, the lower part of the syringe portion 121 and the upper part of the needle tip portion 122 are provided with a connecting slide groove 17, the syringe portion 121 is provided with a mounting hole, the inner needle connecting rod 11 is penetrated in the mounting hole, and the mounting hole is provided with a sliding groove at the position of the outer edge of the syringe portion 121, and the mounting hole, the sliding groove and the connecting slide groove 17 are connected to each other.

[0043] like Figure 4 As shown, a plurality of driving guide blocks 18 are arranged at intervals above the fixed needle holes on both sides of the lower side of the needling beam plate 9, and a lifting slope is arranged on one side of the driving guide block 18, and the upper end of the lifting slope is flush with the lower side of the needling beam plate 9. The lower side wall of the needling beam plate 9, the lifting slope, and the top wall of the driving guide block 18 together constitute a driving track, which is divided into three parts. The first part is the lower side wall of the needling beam plate 9 for the needle lowering process, in which the barb groove hooks the PPS / PTFE needle-punched filter material fiber to make the fibers intertwined with each other during the needling needle lowering process. The second part is the lifting slope, in which the outer needle cylinder 12 penetrates the PPS / PTFE needle-punched filter material. The third part is the part sliding on the top wall of the driving guide block 18, and this process is the process of lifting the needle during needling. An extension block is fixed to the side wall of the driving guide block 18, and a driving rack 20 is arranged on the lower side of the extension block. The starting end of the driving rack 20 is arranged to be flush with the top wall of the driving guide block 18.

[0044] like Figure 2 , Figure 6 As shown, a driving gear 21 is provided at the upper end of the inner needle connecting rod 11, and a wedge-shaped slider 19 is rotatably connected to the upper side of the driving gear 21. The cross-section of the wedge-shaped slider 19 is a right-angled trapezoid, and the front side of the wedge-shaped slider 19 is set as a sliding inclined surface parallel to the lifting inclined surface. A guide convex strip 22 is formed integrally with the top of the wedge-shaped slider 19, and a connecting guide groove is provided on the needle beam plate 9 and the driving guide block 18, and the guide convex strip 22 is slidably connected in the guide groove. A limited outer ring 23 is integrally formed and fixed on the middle outer edge of the inner needle connecting rod 11, and a convergence component is installed at the lower end of the inner needle connecting rod 11. Through the above technical solution, the wedge-shaped slider 19 and the driving guide block 18 are used in conjunction with each other. In the above-mentioned driving track, the wedge-shaped slider 1 During the sliding process on the lower side wall of the needle-punched beam plate 9, the inner needle connecting rod 11 always moves horizontally with the outer needle cylinder 12 under the action of the return spring 16. When the second part is at the position of the lifting slope, this process is the needle-down process. The fibers of the PPS / PTFE needle-punched filter material are intertwined with each other, and the sliding slope and the lifting slope conflict with each other. The inner needle connecting rod 11 slides downward relative to the outer needle cylinder 12, and the contraction component moves downward from the needle cylinder part 121 of the outer needle cylinder 12 to the needle tip part 122. At the position of the needle tip part 122, the outer wall of the needle tip part 122 protrudes from the position of the connecting slide groove 17, which is convenient for hooking the fibers inside the puncture hole of the PPS / PTFE needle-punched filter material to contract the puncture hole and reduce the inner diameter of the puncture hole, thereby achieving the effect of no hole after acupuncture.

[0045] like Figure 6 , Figure 7As shown, the focusing assembly includes a focusing bracket 24, a focusing worm 25, a focusing worm wheel 26, a transmission chain 27 and a focusing wheel 28. The focusing bracket 24 includes a guide vertical rod and a bite block. The guide vertical rod is slidably installed in the sliding groove. The bite block is provided with a limiting groove on the side facing the limiting outer ring 23. The limiting groove is slidably matched with the limiting outer ring 23. The focusing worm 25 is fixed to the lower end of the inner needle connecting rod 11. The lower end of the guide vertical rod is provided with a mounting slot hole. The focusing worm wheel 26 is rotatably connected to the upper side of the mounting slot hole. The focusing worm 25 and the focusing worm wheel 26 are meshed with each other. The outer edge of the focusing worm wheel 26 is placed in the sliding groove. In the above technical scheme In the embodiment, the inner needle connecting rod 11 is driven to rotate through the interaction between the driving rack 20 and the driving gear 21, so that the closing worm 25 drives the closing worm wheel 26 to rotate, and the closing wheel 28 is rotatably connected to the lower end of the mounting slot, and the front and rear sides of the closing worm wheel 26 and the closing wheel 28 are integrally formed with a coaxial sprocket 29, and the outer diameter of the coaxial sprocket 29 is smaller than the outer diameter of the closing worm wheel 26 and the closing wheel 28, and the transmission chain 27 is wound around the coaxial sprocket 29 of the closing worm wheel 26 and the closing wheel 28, and the closing wheel 28 slides through the connecting groove 17, and the outer edge of the closing wheel 28 is flush with the outer edge of the needle barrel 121, and the outer edge of the closing wheel 28 is provided with a plurality of closing grooves.

[0046] It is further configured that the width of the acupuncture hole 8 is equal to the outer diameter of the outer needle cylinder 12 , and the length of the acupuncture hole 8 is greater than the outer diameter of the outer needle cylinder 12 and is parallel to the extension direction of the translation screw 14 .

[0047] Working principle:

[0048] In the present invention, as the PPS / PTFE needle-punched filter material is fed, the driving motor 2 rotates, causing the eccentric wheel 3 to rotate eccentrically on the upper seat at the output end of the driving motor 2, and the eccentric rotation drives the driving swing rod 4 to make the lifting guide rod 5 reciprocate up and down. While the up and down reciprocating motion is in progress, the translation motor 13 can make the sliding needle frame 10 reciprocate left and right on the needle-punching beam plate 9, so that the motion trajectory of the sliding needle frame 10 (i.e., the needle-punching mechanism) is an elliptical motion trajectory;

[0049] Take one of the motion cycles as an example:

[0050] In the first sliding process, the lifting guide rod 5 gradually descends during the rotation of the driving motor 2. This process is the needle inserting process, in which the limit positions of the PPS / PTFE needle-punched filter material are interlaced through the barb grooves. At this time, the translation motor 13 drives the sliding needle holder 10 to translate on the lower side wall of the needle-punching beam plate 9 until the sliding inclined surface of the wedge-shaped slider 19 and the lifting inclined surface of the sliding inclined surface of the driving guide block 18 contact each other. At this time, the outer syringe 12 completely penetrates the PPS / PTFE needle-punched filter material.

[0051] During the second sliding process, the driving motor 2 rotates, the lifting guide rod 5 continues to descend, and the translation motor 13 continues to push the sliding needle holder 10. The sliding inclined surface of the wedge-shaped slider 19 and the sliding inclined surface of the driving guide block 18 conflict with each other and slide, and the inner needle connecting rod 11 slides downward through the conflict of the inclined surfaces. During this process, the focusing assembly at the bottom of the inner needle connecting rod 11 moves downward, and the focusing wheel 28 slides downward on the connecting slide. During the sliding process, the focusing wheel 28 moves from the syringe barrel 121 to the needle tip 122. During this process, the outer wall of the needle tip 122 protruding from the focusing groove of the focusing wheel 28 can be used to hook the PPS / PTFE needle-punched filter material fiber in the puncture hole.

[0052] During the third sliding process, the driving motor 2 rotates and the lifting guide rod 5 continues to rise. This is the needle lifting process. The translation motor 13 continues to push the sliding needle holder 10. Under the action of the reset spring 16, the driving gear 21 and the driving rack 20 contact each other. Through sliding, the driving gear 21 rotates during the movement of the driving rack 20, driving the inner needle connecting rod 11 to rotate, so that the focusing worm 25 drives the focusing worm wheel 26 to rotate, and the outer edge of the focusing wheel 28 is rotated downward and inward through the transmission chain 27, pulling the hooked PPS / PTFE needle-punched filter material fiber into the puncture hole to fill the puncture hole until the outer syringe 12 is separated from the PPS / PTFE needle-punched filter material, and the purpose of needle-punching without holes is achieved.

[0053] In summary, the three sliding processes are the lower half of the elliptical trajectory, and the upper half of the circular trajectory is the symmetrical process of the above three sliding processes, which is used to reset the needle-punching mechanism to its original position. During this process, the reverse rotation of the driving gear 21 can cause the focusing wheel 28 to rotate in the reverse direction, so that the PPS / PTFE needle-punched filter material fibers can be withdrawn from the focusing groove, thereby preventing the PPS / PTFE needle-punched filter material fibers from clogging the focusing wheel 28.

[0054] A high-precision PPS / PTFE coated filter material processing technology comprises the following steps:

[0055] S1. Select nano PPS fibers and nano PTFE fibers, seal the nano PPS fibers and nano PTFE fibers with an electrostatic agent for 48 hours, and then loosen the nano PPS fibers and nano PTFE fibers;

[0056] S2, feeding the nano PPS fibers and nano PTFE fibers obtained by the step S1 into a carding machine to form a smooth and uniform wool web by mixing the PPS fibers and PTFE fibers in a ratio of 3 / 7, 4 / 6, 5 / 5, 6 / 4 or 7 / 3 through a cotton feeder;

[0057] S3, select PTFE mesh as the base fabric, and evenly stack the wool mesh of step S2 on the upper and lower cottons of the PTFE mesh base fabric to make a PPS / PTFE composite felt material;

[0058] S4, subjecting the PPS / PTFE composite felt material obtained in step S3 to a needle-punching treatment through multiple needle-punching devices to obtain a non-porous PPS / PTFE needle-punched filter material;

[0059] S5, subjecting the non-porous PPS / PTFE needle-punched filter material obtained in step S4 to heat setting and singeing calendering processing in a heat setting machine and a singeing machine;

[0060] S6, introducing the non-porous PPS / PTFE needle-punched filter material processed in step S5 into an immersion tank filled with 0.5 mg / mL, 1 mg / mL or 2 mg / mL ANF dispersion to obtain a PPS / PTFE membrane filter material;

[0061] S7, rolling up the film-coated filter material obtained in step S6 on a winding roller.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision PPS / PTFE coated filter material processing equipment, which includes, from front to back, an opener, a cotton feeder, a carding machine, a web laying machine, a needle punching device, a heat setting machine, a singeing machine, an impregnation tank and a winding roller, characterized in that: The acupuncture device comprises a frame, a driving motor is installed on the frame, an eccentric wheel is sleeved on the output end of the driving motor, a driving swing rod is rotatably connected to the front axis of the eccentric wheel, a lifting guide rod is hinged at the lower end of the driving swing rod, the lifting guide rod is vertically slidably connected to the frame, acupuncture mechanism is fixedly installed at the lower end of the lifting guide rod, the acupuncture mechanism comprises acupuncture beam, a sliding needle frame, an inner needle connecting rod, an outer needle cylinder and a gathering assembly, the acupuncture beam is fixed to the lower end of the lifting guide rod, the sliding beam is slidably connected to the lower side of the acupuncture beam, a plurality of fixed needle holes are arranged on the sliding needle frame, the inner needle connecting rod passes through the fixed needle hole, the upper end of the outer needle cylinder is fixed to the lower side of the sliding needle frame, the inner needle connecting rod is slidably penetrated in the outer needle cylinder, and a plurality of barb grooves are arranged on the outer wall of the outer needle cylinder.

2. A high-precision PPS / PTFE coated filter material processing equipment according to claim 1, characterized in that: A horizontal guide rail is arranged on the lower side of the acupuncture beam, a guide slider is arranged on the upper side of the sliding needle holder, the guide slider is slidably installed on the horizontal guide rail, the cross-section of the sliding needle holder is arranged in a "J" shape, the guide slider is arranged on the upper middle side of the sliding needle holder, a plurality of fixed needle holes are evenly distributed on the left and right sides of the sliding needle holder, a translation nut is arranged on the lower middle side of the sliding needle holder, a translation motor is fixed to the lower side of one end of the acupuncture beam, a translation screw is connected to the output end of the translation motor, and the translation screw is threadedly matched with the translation nut.

3. A high-precision PPS / PTFE coated filter material processing equipment according to claim 2, characterized in that: A plurality of driving guide blocks are arranged at intervals above the fixed needle holes on both sides of the lower side of the needling beam plate, and a lifting slope is arranged on one side of the driving guide block, and the upper end of the lifting slope is flush with the lower side surface of the needling beam plate. An extension block is fixed to the side wall of the driving guide block, and a driving rack is arranged on the lower side of the extension block.

4. A high-precision PPS / PTFE coated filter material processing equipment according to claim 3, characterized in that: A driving gear is provided at the upper end of the inner needle connecting rod, and a wedge-shaped slider is rotatably connected to the upper side of the driving gear. The cross-section of the wedge-shaped slider is a right-angled trapezoid, and the front side of the wedge-shaped slider is arranged as a sliding inclined plane parallel to the lifting inclined plane. A guide ridge is integrally formed on the top of the wedge-shaped slider, and a connecting guide groove is provided on the needle beam plate and the driving guide block, and the guide ridge is slidably connected in the guide groove.

5. A high-precision PPS / PTFE membrane filter material processing equipment according to claim 4, characterized in that: The focusing assembly includes a focusing bracket, a focusing worm, a focusing worm wheel, a transmission chain and a focusing wheel. A limiting slot is provided at the upper end of the focusing bracket, and a limiting outer ring is integrally formed on the middle outer edge of the inner needle connecting rod. The focusing bracket is rotatably connected to the limiting outer ring, and the focusing worm is fixed to the lower end of the inner needle connecting rod. The focusing worm wheel is rotatably connected to the middle part of the focusing bracket, and the focusing worm and the focusing worm wheel are meshed with each other. The focusing wheel is rotatably connected to the lower end of the focusing bracket, and coaxial sprockets are integrally formed on the front and rear sides of the focusing worm wheel and the focusing wheel, and the transmission chain is wound around the coaxial sprockets of the focusing worm wheel and the focusing wheel.

6. A high-precision PPS / PTFE coated filter material processing equipment according to claim 5, characterized in that: The outer syringe includes an integrally formed syringe portion and a needle tip portion, the outer wall cross-section of the syringe portion is triangular, the barb grooves are evenly staggered and distributed on the outer wall of the syringe portion, the needle tip portion is configured to be conical, a connecting slide groove is provided at the lower portion of the syringe portion and the upper portion of the needle tip portion, the focusing wheel slides through the connecting slide groove, the outer edge of the focusing wheel is flush with the outer edge of the syringe portion, and a plurality of focusing grooves are provided at the outer edge of the focusing wheel.

7. A high-precision PPS / PTFE membrane filter material processing equipment according to claim 6, characterized in that: A needling plate is fixed on the frame, and a plurality of needling holes are opened on the needling plate. The needling holes are arranged as long strip holes, and the width of the needling holes is equal to the outer diameter of the outer syringe, and the length of the needling holes is greater than the outer diameter of the outer syringe and is parallel to the extension direction of the translation screw.

8. The high-precision PPS / PTFE membrane filter material processing equipment according to claim 7 is characterized in that: A return spring is sleeved on the upper end of the outer wall of the inner needle connecting rod, and two ends of the return spring are respectively abutted between the driving gear and the sliding needle frame.

9. A high-precision PPS / PTFE membrane filter material processing process according to any one of claims 1 to 8, characterized in that: The steps include: S1, selecting nano PPS fibers and nano PTFE fibers, respectively sealing the nano PPS fibers and nano PTFE fibers with an electrostatic agent for 48 hours, and then respectively loosening the nano PPS fibers and nano PTFE fibers; S2, feeding the nano PPS fibers and nano PTFE fibers obtained by the step S1 into a carding machine to form a smooth and uniform wool web by mixing the PPS fibers and PTFE fibers in a ratio of 3 / 7, 4 / 6, 5 / 5, 6 / 4 or 7 / 3 through a cotton feeder; S3, select PTFE mesh as the base fabric, and evenly stack the wool mesh of step S2 on the upper and lower cottons of the PTFE mesh base fabric to make a PPS / PTFE composite felt material; S4, subjecting the PPS / PTFE composite felt material obtained in step S3 to a needle-punching treatment through multiple needle-punching devices to obtain a non-porous PPS / PTFE needle-punched filter material; S5, subjecting the non-porous PPS / PTFE needle-punched filter material obtained in step S4 to heat setting and singeing calendering processing in a heat setting machine and a singeing machine; S6, introducing the non-porous PPS / PTFE needle-punched filter material processed in step S5 into an immersion tank filled with 0.5 mg / mL, 1 mg / mL or 2 mg / mL ANF dispersion to obtain a PPS / PTFE membrane filter material; S7, rolling up the film-coated filter material obtained in step S6 on a winding roller.

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