A hollow fiber ultrafiltration membrane and winding production line

Abstract

The present invention discloses a hollow fiber ultrafiltration membrane and a winding production line, comprising a shaping tank, a winding platform and a winding wheel, wherein the hollow fiber ultrafiltration membrane drawn out of the shaping tank is wound on the winding wheel, and further comprising: two fixed pulleys, both of which are rotatably connected to the winding platform; a drop frame, which is fixedly arranged on the winding platform and corresponds to the lower side between the two fixed pulleys, on which a slide seat is movably arranged; a movable pulley, which is rotatably connected to the slide seat, on which a counterweight is arranged. The present invention can form a section of the hollow fiber ultrafiltration membrane between the shaping tank and the winding wheel into an M shape by arranging a combination of two fixed pulleys and one movable pulley, and under the arrangement of the movable pulley combined with the counterweight, a falling force is applied to the part of the hollow fiber ultrafiltration membrane, thereby ensuring that the hollow fiber ultrafiltration membrane will not be loose on the winding wheel, and through the speed regulating component, the production speed of the hollow fiber ultrafiltration membrane can be matched with the rotation speed of the winding wheel in real time.

Description

Technical Field

[0001] The invention relates to the technical field of ultrafiltration membrane production, and in particular to a hollow fiber ultrafiltration membrane and a winding production line. Background Art

[0002] Hollow ultrafiltration membrane filaments, also known as hollow fiber ultrafiltration membranes, are a type of ultrafiltration membrane. They are in the shape of hollow silk tubes with micropores all over the tube wall. The pore size is relatively large based on the molecular weight of the substance that can be retained, and the retained molecular weight can reach several thousand to several hundred thousand. During the production process of hollow ultrafiltration membrane filaments, the membrane filaments need to be towed to the shearing equipment after forming, and the continuous membrane filaments are sheared into sections of equal length. The ends of the sheared membrane filaments are then aligned and bundled into bundles, and the membrane filament bundles are then hung in a constant humidity and pressure factory for airing or drying. In order to facilitate the concentrated bundling of the membrane filaments, a winding production line will be used to wind up the produced membrane filaments, and the concentrated bundled membrane filaments can also be sheared on the winding production line. The existing winding production lines can basically meet daily use needs, but there are still some shortcomings that need to be improved.

[0003] Patent document CN102489169A, published on June 13, 2012, discloses a straight winding device that can be widely used in hollow fiber membranes for hollow ultrafiltration, hollow nanofiltration and other production enterprises. The device solves the problem that the hollow fiber membrane adopts circular winding during membrane spinning, which causes the inner and outer arcs of the membrane wall to be of different lengths and the pore size to be uneven due to the arc shape of the hollow membrane. The technical solution uses a linear winding device to spin a membrane that is not affected by the arc shape, and the membrane wall thickness and pore size are uniform, which improves the quality of membrane spinning and is a major advancement in the membrane industry. The specific technical solution includes: the straight winding device includes three parts: a transmission part, a fork part and a straight winding wheel disc, and the straight winding wheel disc part includes three parts: a shaft sleeve, a wheel disc frame and a straight disc surface.

[0004] As in the prior art of the above-mentioned patent, after the hollow fiber ultrafiltration membrane is produced by extrusion, it must be shaped in a shaping tank and then undergo a winding process. Obviously, if the production speed of the hollow fiber ultrafiltration membrane does not match the winding speed, the hollow fiber ultrafiltration membrane will become loose or over-stretched, thereby causing the hollowness of the hollow fiber ultrafiltration membrane to be uneven. Therefore, there is an urgent need for a hollow fiber ultrafiltration membrane and a winding production line to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a hollow fiber ultrafiltration membrane and a winding production line to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A hollow fiber ultrafiltration membrane comprises a shaping tank, a winding platform and a winding wheel. The hollow fiber ultrafiltration membrane drawn out of the shaping tank is wound on the winding wheel. The invention also comprises: two fixed pulleys, both of which are rotatably connected to the winding platform; a drop frame, which is fixedly arranged on the winding platform and corresponds to the lower side between the two fixed pulleys, on which a slide seat is movably arranged; a movable pulley, which is rotatably connected to the slide seat and on which a counterweight is arranged; the hollow fiber ultrafiltration membrane between the shaping tank and the winding wheel is arranged in an M shape around each fixed pulley and movable pulley; a speed regulating component, which is arranged on the drop frame and adjusts the speed of the winding wheel accordingly by detecting the height of the slide seat.

[0008] Preferably, the regulating component includes a detection area arranged on the drop frame, and a deceleration sensor and an acceleration sensor for controlling the winding wheel are respectively arranged at the upper and lower ends of the detection area, and a trigger unit matching the deceleration sensor and the acceleration sensor is arranged on the slide.

[0009] Preferably, a fixed axis is provided on the winding table, and the winding wheel is movably provided on the fixed axis. A driving assembly is provided on the winding table, and the driving assembly can drive the winding wheel to reciprocate along the axial direction of the fixed axis. When the winding wheel moves axially along the fixed axis and approaches the winding table, the winding wheel rotates synchronously to wind up the hollow fiber ultrafiltration membrane, and when the winding wheel moves axially along the fixed axis and away from the winding table, the winding wheel does not rotate.

[0010] Preferably, the driving assembly includes a screw rotatably arranged on the winding table, the screw is coaxially connected to a driving wheel via a first one-way transmission component, an inner gear ring meshing with the driving wheel is coaxially arranged on the inner side of the winding wheel, a rotary plate is coaxially connected to the inside of the winding wheel via a second one-way transmission component, and the screw and the rotary plate are threadedly connected.

[0011] Preferably, the winding wheel is provided with a knife outlet, and the hollow fiber ultrafiltration membrane wound on the winding wheel passes through the knife outlet, a cutter is movably provided in the knife outlet, and the winding wheel is provided with a linkage component which links the axial movement of the winding wheel with the movement of the cutter, when the winding wheel approaches the winding table, the cutter remains retracted into the knife outlet, and when the winding wheel moves away from the winding table, the cutter remains extended out of the knife outlet and moves along the knife outlet to cut off the hollow fiber ultrafiltration membrane.

[0012] Preferably, the linkage component includes a movable groove arranged in the winding wheel, a kit is movably arranged in the movable groove, a slider is arranged on the outer wall of the kit, an inclined sliding groove matching the slider is arranged on the inner wall of the movable groove, the cutter is elastically and telescopically arranged on the kit, a limiting component is arranged on the inner wall of the movable groove for limiting the cutter from popping out of the kit when the winding wheel approaches the winding table, and the movement of the kit in the movable groove is linked with the movement of the winding wheel relative to the winding table.

[0013] Preferably, the limiting assembly includes a groove arranged on the inner wall of the movable groove, the cutter side wall is fixedly provided with a lever sliding through the sleeve, one end of the lever extending out of the sleeve extends into the groove, and a limiting strip is arranged in the groove.

[0014] Preferably, a first gear is rotatably arranged inside the winding wheel, the first gear is meshingly connected with a first rack, one end of the first rack slides out of the end surface of the winding wheel close to the winding table and is movably connected to the winding table, the first gear is coaxially connected with a second gear, the second gear is meshingly connected with a second rack, and one end of the second rack is slidably connected to the kit.

[0015] Preferably, a wire locker is provided on the winding table, and a pressure switch electrically connected to the wire locker is provided on the winding table, the pressure switch is triggered when the winding wheel approaches the winding table to cause abutment, and an unlocking switch is provided on the wire locker.

[0016] A hollow fiber ultrafiltration membrane is produced based on the above winding production line, comprising a hollow fiber ultrafiltration membrane made of PVDF material and arranged in a hollow fiber tube shape.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] The winding production line can form a section of hollow fiber ultrafiltration membrane between the shaping tank and the winding wheel into an M shape by setting a combination of two fixed pulleys and a movable pulley, and exert a downward force on this section of hollow fiber ultrafiltration membrane when the movable pulley is combined with a counterweight, thereby ensuring that the hollow fiber ultrafiltration membrane will not become loose on the winding wheel, and through the speed regulating component, the production speed of the hollow fiber ultrafiltration membrane can be matched with the rotation speed of the winding wheel in real time, avoiding the loosening of the hollow fiber ultrafiltration membrane and excessive pulling of the hollow fiber ultrafiltration membrane, thereby ensuring the hollow uniformity of the hollow fiber ultrafiltration membrane and improving product quality.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0023] Figure 2 The embodiment of the present invention provides Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 3 A schematic diagram of a side cross-sectional structure of a drop frame provided by an embodiment of the present invention;

[0025] Figure 4 The embodiment of the present invention provides Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0026] Figure 5 A schematic diagram of a side cross-sectional structure provided by an embodiment of the present invention;

[0027] Figure 6 The embodiment of the present invention provides Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0028] Figure 7 A schematic cross-sectional view of the inclined chute provided in an embodiment of the present invention;

[0029] Figure 8 A schematic cross-sectional structural diagram of a groove provided in an embodiment of the present invention;

[0030] Fig. 9 A schematic diagram of a winding wheel and a sleeve linkage structure provided by an embodiment of the present invention;

[0031] Fig.10 A schematic structural diagram of the winding wheel and kit linkage structure from another perspective provided by an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Forming pool; 2. Winding table; 3. Winding wheel; 4. Fixed pulley; 5. Drop frame; 6. Slide seat; 7. Movable pulley; 8. Deceleration sensor; 9. Acceleration sensor; 10. Trigger unit; 11. Fixed shaft; 12. Screw; 13. First one-way transmission member; 14. Driving wheel; 15. Internal gear ring; 16. Second one-way transmission member; 17. Rotary plate; 18. Knife outlet; 19. Cutter; 20. Movable groove; 21. Kit; 22. Slider; 23. Inclined slide groove; 24. Groove; 25. Push rod; 26. Limiting strip; 27. First gear; 28. First rack; 29. ​​Second gear; 30. Second rack; 31. Wire locker; 32. Pressure switch; 33. Unlocking switch. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0035] See also Figure 1-10 A hollow fiber ultrafiltration membrane and a winding production line provided by an embodiment of the present invention include a shaping tank 1, a winding platform 2 and a winding wheel 3. The hollow fiber ultrafiltration membrane drawn out of the shaping tank 1 is wound on the winding wheel 3, and also includes: two fixed pulleys 4, both of which are rotatably connected to the winding platform 2; a drop frame 5, which is fixedly arranged on the winding platform 2 and corresponds to the lower side between the two fixed pulleys 4, and a slide 6 is movably arranged on it; a movable pulley 7, which is rotatably connected to the slide 6, and a counterweight is arranged on it; the hollow fiber ultrafiltration membrane between the shaping tank 1 and the winding wheel 3 is arranged in an M shape around each fixed pulley 4 and the movable pulley 7; a speed regulating component, which is arranged on the drop frame 5, and adjusts the speed of the winding wheel 3 by detecting the height of the slide 6.

[0036] Specifically, one end of the shaping tank 1 far from the winding table 2 is docked with the hollow fiber ultrafiltration membrane extrusion production equipment; a coagulating liquid for helping the hollow fiber ultrafiltration membrane to be shaped is contained in the shaping tank 1; a height-limiting structure is arranged below the liquid level in the shaping tank 1, and the hollow fiber ultrafiltration membrane passes below the height-limiting structure to ensure that the hollow fiber ultrafiltration membrane passes through the coagulating liquid. The winding table 2 is vertical, the winding wheel 3 is rotatably arranged on the side of the winding table 2, the axial direction of the winding wheel 3 is horizontal and is arranged perpendicular to the extending direction of the hollow fiber ultrafiltration membrane; one end of the hollow fiber ultrafiltration membrane led out from the shaping tank 1 is fixed on the winding wheel 3, and preferably fixed by means of tape, clip, magnetic attraction pressing, etc., which is convenient for subsequent removal of the hollow fiber ultrafiltration membrane. The guiding of the hollow fiber ultrafiltration membrane by each fixed pulley 4 and the movable pulley 7 is arranged in the same plane; the heights of the two fixed pulleys 4 are the same or close; the dropping frame 5 preferably has a "C" shape, the horizontal part is fixedly connected to the side wall of the winding table 2, and the vertical part is arranged perpendicular to the ground; the sliding seat 6 is slidably connected to the vertical part of the dropping frame 5; the counterweight on the movable pulley 7 is sufficient to tension the hollow fiber ultrafiltration membrane without causing excessive pulling. When the sliding seat 6 rises to a certain height, that is, the remaining amount of the hollow fiber ultrafiltration membrane bypassing the movable pulley 7 is insufficient and has a tendency to continue to decrease, the speed regulating component correspondingly adjusts the rotation speed of the winding wheel 3 to slow down, and when the sliding seat 6 drops to a certain height, that is, the remaining amount of the hollow fiber ultrafiltration membrane bypassing the movable pulley 7 is excessive and has a tendency to continue to increase, the speed regulating component correspondingly adjusts the rotation speed of the winding wheel 3 to speed up. In the actual use of this technical solution, the combination of two fixed pulleys 4 and one movable pulley 7 can form an M shape for a section of the hollow fiber ultrafiltration membrane between the shaping tank 1 and the winding wheel 3, and with the setting of the movable pulley 7 combined with the counterweight, a downward falling force is applied to this part of the hollow fiber ultrafiltration membrane, thereby ensuring that the hollow fiber ultrafiltration membrane will not be loose on the winding wheel 3, and through the speed regulating component, the production speed of the hollow fiber ultrafiltration membrane can be matched with the rotation speed of the winding wheel 3 in real time, avoiding the hollow fiber ultrafiltration membrane from being loose and also avoiding excessive pulling on the hollow fiber ultrafiltration membrane, ensuring the hollow uniformity of the hollow fiber ultrafiltration membrane and improving the product quality.

[0037] Compared with the prior art, a winding production line proposed in an embodiment of the present invention can form an M shape for a section of the hollow fiber ultrafiltration membrane between the shaping tank 1 and the winding wheel 3 by setting the combination of two fixed pulleys 4 and one movable pulley 7, and with the setting of the movable pulley 7 combined with the counterweight, a downward falling force is applied to this part of the hollow fiber ultrafiltration membrane, thereby ensuring that the hollow fiber ultrafiltration membrane will not be loose on the winding wheel 3, and through the speed regulating component, the production speed of the hollow fiber ultrafiltration membrane can be matched with the rotation speed of the winding wheel 3 in real time, avoiding the hollow fiber ultrafiltration membrane from being loose and also avoiding excessive pulling on the hollow fiber ultrafiltration membrane, ensuring the hollow uniformity of the hollow fiber ultrafiltration membrane and improving the product quality.

[0038] As a preferred technical solution of this embodiment, a detection area is provided on the drop frame 5, and a deceleration sensor 8 and an acceleration sensor 9 for controlling the winding wheel 3 are respectively provided at the upper and lower ends of the detection area, and a trigger unit 10 matching the deceleration sensor 8 and the acceleration sensor 9 is provided on the slide 6. Specifically, when the production speed of the hollow fiber ultrafiltration membrane is slower than the speed of winding the hollow fiber ultrafiltration membrane by the winding wheel 3, the length of the hollow fiber ultrafiltration membrane bypassing the movable pulley 7 between the two fixed pulleys 4 is slowly reduced, thereby driving the movable pulley 7 to rise. When the movable pulley 7 drives the slide 6 to rise to a certain height, that is, the residual amount of the hollow fiber ultrafiltration membrane bypassing the movable pulley 7 is insufficient and has a tendency to continue to decrease. The trigger unit 10 corresponds to the deceleration sensor 8 to control the winding wheel 3 to adjust the speed to slow down, thereby re-matching the hollow fiber ultrafiltration membrane production speed; when the hollow fiber ultrafiltration membrane production speed is faster than the speed of the winding wheel 3 to reel in the hollow fiber ultrafiltration membrane, the length of the hollow fiber ultrafiltration membrane bypassing the movable pulley 7 between the two fixed pulleys 4 slowly increases, thereby driving the movable pulley 7 to descend, and the movable pulley 7 drives the slide 6 to descend to a certain height, that is, the hollow fiber ultrafiltration membrane bypassing the movable pulley 7 has too much surplus and has a trend of continuing to increase, the trigger unit 10 corresponds to the acceleration sensor 9 to control the winding wheel 3 to adjust the speed to speed up, thereby re-matching the hollow fiber ultrafiltration membrane production speed. Preferably, the principle of the deceleration sensor 8 and the acceleration sensor 9 controlling the speed of the winding wheel 3 can be achieved by increasing or decreasing the voltage of the driving unit of the winding wheel 3, and the specific circuit is a prior art and is not repeated.

[0039] As a preferred technical solution of this embodiment, a fixed axis 11 is provided on the winding table 2, and a winding wheel 3 is movably provided on the fixed axis 11. A driving assembly is provided on the winding table 2, and the driving assembly can drive the winding wheel 3 to reciprocate along the axial direction of the fixed axis 11. When the winding wheel 3 moves axially along the fixed axis 11 and approaches the winding table 2, the winding wheel 3 rotates synchronously to wind up the hollow fiber ultrafiltration membrane, and when the winding wheel 3 moves axially along the fixed axis 11 and away from the winding table 2, the winding wheel 3 does not rotate. Specifically, the axial direction of the fixed axis 11 is horizontal and perpendicular to the extension direction of the hollow fiber ultrafiltration membrane. The fixed axis 11 is coaxial with the winding wheel 3; the winding wheel 3 can move axially along the fixed axis 11, and can also rotate on the fixed axis 11; when the driving component drives the winding wheel 3 to move axially along the fixed axis 11 close to the winding platform 2, the winding wheel 3 rotates synchronously to reel in the hollow fiber ultrafiltration membrane, so that the hollow fiber ultrafiltration membrane can be automatically spirally wound on the winding wheel 3 without overlapping, thereby avoiding mutual squeezing of the hollow fiber ultrafiltration membranes; when the driving component drives the winding wheel 3 to move axially along the fixed axis 11 away from the winding platform 2, the winding wheel 3 is reset, and the winding wheel 3 does not rotate at this time.

[0040] As a preferred technical solution of this embodiment, the driving assembly includes a screw 12 rotatably arranged on the winding platform 2, the screw 12 is coaxially connected to a driving wheel 14 through a first one-way transmission member 13, an inner gear ring 15 meshing with the driving wheel 14 is coaxially arranged on the inner side of the winding wheel 3, a rotating plate 17 is coaxially connected to the winding wheel 3 through a second one-way transmission member 16, and the screw 12 and the rotating plate 17 are threadedly connected. Specifically, the screw 12 is preferably multiple and evenly distributed around the circumference of the fixed axis 11, which can drive the winding wheel 3 more stably; A one-way transmission member 13 is preferably a one-way bearing or a ratchet pawl mechanism, the inner ring of which is coaxially fixedly connected to the screw 12, and the outer ring is coaxially fixedly connected to the driving wheel 14; the first one-way transmission member 13 only transmits the rotation direction of the screw 12 used to drive the winding wheel 3 to reel in the hollow fiber ultrafiltration membrane to the driving wheel 14, and the rotation of the other rotation direction is not transmitted to the driving wheel 14; the driving wheel 14 is preferably a gear; the rotating plate 17 is in the shape of a circular plate, the center of which is sleeved on the fixed shaft 11 and can move axially along the fixed shaft 11; the plurality of screws 12 drive the rotating plate 17 The movement is kept consistent and the direction is synchronized; a concave ring is arranged on the inner side of the winding wheel 3, and the rotary plate 17 is rotatably connected in the concave ring; the second one-way transmission member 16 is arranged between the inner side of the concave ring and the rotary plate 17; the second one-way transmission member 16 is preferably a ratchet mechanism, which can be specifically that a plurality of elastically hinged ratchets are evenly arranged on the circumference of the outer circular wall of the rotary plate 17, and a ratchet groove matching the ratchet is arranged on the inner wall of the concave ring; the rotary plate 17 does not rotate relative to the winding platform 2, and when the winding wheel 3 rotates in the direction of winding the hollow fiber ultrafiltration membrane, the second one-way transmission member 16 The rotation of the winding wheel 3 relative to the rotary plate 17 is not restricted, and when the winding wheel 3 rotates in another direction, it is restricted by the second one-way transmission member 16. Therefore, when the screw 12 rotates to drive the rotary plate 17, the winding wheel 3 moves axially along the fixed axis 11 to move away from the winding platform 2, and the winding wheel 3 does not rotate; preferably, a plurality of motors can be arranged in the winding platform 2, which are respectively connected to each screw 12 and synchronously controlled under the servo system; or a single motor can be arranged in the winding platform 2, and the plurality of screws 12 are connected by a transmission structure.

[0041] In another embodiment of the present invention, a knife opening 18 is provided on the winding wheel 3, and the hollow fiber ultrafiltration membrane wound on the winding wheel 3 is all passed through the knife opening 18. A cutter 19 is movably provided in the knife opening 18. A linkage component is provided on the winding wheel 3 to link the axial movement of the winding wheel 3 and the movement of the cutter 19. When the winding wheel 3 approaches the winding table 2, the cutter 19 remains retracted into the knife opening 18, and when the winding wheel 3 moves away from the winding table 2, the cutter 19 remains extended out of the knife opening 18 and moves along the knife opening 18 to cut off the hollow fiber ultrafiltration membrane. Specifically, the knife opening 18 extends in the axial direction of the winding wheel 3; the cutter 19 extends in the radial direction of the winding wheel 3, and a blade is provided at least on one side close to the winding table 2; the movement of the cutter 19 can be along the radial direction of the winding wheel 3. The specific linkage relationship between the linkage assembly and the winding wheel 3 and the cutter 19 is as follows: when the winding wheel 3 approaches the winding platform 2, the winding wheel 3 rotates synchronously to wind up the hollow fiber ultrafiltration membrane, and the hollow fiber ultrafiltration membrane passes through the knife opening 18 in circles. During this process, the cutter 19 remains in the knife opening 18. When the winding wheel 3 is against the winding platform 2, the cutter 19 corresponds to the knife opening 18 and extends out of the knife opening 18 at one end away from the winding platform 2. Subsequently, the winding wheel 3 moves away from the winding platform 2 without rotating, and the cutter 19 approaches the winding platform 2 in linkage, then the cutter 19 slides in the knife opening 18 to cut off each hollow fiber ultrafiltration membrane, and when the winding wheel 3 returns to the farthest position from the winding platform 2, the cutter 19 retracts the knife opening 18.

[0042] As a preferred technical solution of this embodiment, the linkage component includes an active groove 20 set in the winding wheel 3, a kit 21 is movably set in the active groove 20, a slider 22 is set on the outer wall of the kit 21, and an inclined slide groove 23 matching the slider 22 is set on the inner wall of the active groove 20. The cutter 19 is elastically and telescopically set on the kit 21, and the inner wall of the active groove 20 is provided with a limit component for limiting the cutter 19 from popping out of the kit 21 when the winding wheel 3 approaches the winding table 2. The movement of the kit 21 in the active groove 20 is coordinated with the winding wheel 3. The movable linkage of the winding table 2 is specifically that the movable groove 20 is arranged along the radial direction of the winding wheel 3, and one end of the movable groove 20 is connected to the knife outlet 18; the extension direction of the sleeve 21 is in line with the cutter 19; a spring is arranged in the sleeve 21, and one end of the cutter 19 extends into the sleeve 21 and abuts against the spring; the setting of the spring keeps the cutter 19 extending out of the sleeve 21; when the slider 22 is at one end of the inclined slide groove 23 close to the winding table 2, the sleeve 21 is farthest from the knife outlet 18, and at this time, the freely popped-out cutter 19 is just retracted into the knife outlet 18 When the slider 22 is at the end of the inclined slot 23 away from the winding table 2, the kit 21 is closest to the knife outlet 18. At this time, the freely ejected cutter 19 can extend out of the knife outlet 18 to the maximum length; the limit assembly is arranged on the opposite side of the inclined slot 23; the limit assembly limits the cutter 19 from popping out of the kit 21 when the winding wheel 3 approaches the winding table 2, that is, when the winding wheel 3 is winding the hollow fiber ultrafiltration membrane, the cutter 19 is restricted from popping out of the kit 21 and remains stored in the knife outlet 18; and when the winding wheel 3 is against the winding table 2, the limit assembly The positioning component removes the restriction on the cutter 19 to pop out the kit 21. At this time, the kit 21 is also in the position closest to the knife outlet 18, and the popped-out cutter 19 can extend out of the knife outlet 18 to the maximum length; the active linkage relationship between the kit 21 and the winding wheel 3 is specifically as follows: when the winding wheel 3 approaches the winding table 2, the kit 21 moves from the end close to the winding table 2 to the end away from the winding table 2 in the active groove 20, and when the winding wheel 3 moves away from the winding table 2, the kit 21 moves from the end away from the winding table 2 to the end close to the winding table 2 in the active groove 20. When the set 21 moves from one end close to the winding table 2 to one end away from the winding table 2 in the movable groove 20, the cutter 19 is restricted by the limiting component and does not extend out of the knife opening 18; and when the set 21 moves from one end away from the winding table 2 to one end close to the winding table 2 in the movable groove 20, the limiting component cancels the restriction, the cutter 19 pops out of the set 21, and extends out of the knife opening 18, and as the set 21 slides close to the winding table 2, it moves along the inclined slide groove 23 and moves away from the knife opening 18, and then drives the cutter 19 to slide down in the knife opening 18, so that it can slide down and cut while moving along the knife opening 18, ensuring that the hollow fiber ultrafiltration membrane is smoothly cut.

[0043] As the preferred technical solution of this embodiment, the limiting assembly includes a groove 24 arranged on the inner wall of the movable groove 20, a lever 25 slidingly penetrating the sleeve 21 is fixedly arranged on the side wall of the cutter 19, and one end of the lever 25 extending out of the sleeve 21 extends into the groove 24, and a limiting strip 26 is arranged in the groove 24. Specifically, the groove 24 is arranged on the opposite side of the inclined slide groove 23; the lever 25 is arranged perpendicular to the groove 24; when the cutter 19 freely pops out of the sleeve 21, it can still extend a certain length outside the sleeve 21 under external force; the limiting strip 26 is arranged parallel to the knife outlet 18, and the height corresponds to the height of the carrying lever 25 when the cutter 19 is fully retracted into the knife outlet 18, and both ends of the limiting strip 26 are spaced from the inner side of the groove 24, and at the two ends of the sleeve 21 that moves in the movable groove 20, it drives the lever 25 on the cutter 19 to just correspond to the space left at the two ends of the limiting strip 26. In actual use, when the sleeve 21 moves from the end away from the winding table 2 to the end close to the winding table 2 in the movable groove 20, the cutter 19 first keeps elastically extending out of the sleeve 21, and then as the sleeve 21 moves, the lever 25 on the cutter 19 approaches the limit bar 26. When the lever 25 approaches one end of the limit bar 26, the sleeve 21 continues to move toward the winding table 2, and the lever 25 squeezes and pushes the upper side of the limit bar 26. Then, the lever 25 corresponds to the interval left at this end of the limit bar 26, and the lever 25 elastically resets downward to be below the height of the limit bar 26. Then, the sleeve 21 moves from the end close to the winding table 2 to the end away from the winding table 2 in the movable groove 20. At the end, the set 21 moves upward, but at the beginning, the lever 25 remains below the limit strip 26, and then is blocked by the limit strip 26 and keeps sliding below the limit strip 26, so that during the upward movement of the set 21, the distance between the cutter 19 and the knife outlet 18 remains fixed, that is, the cutter 19 does not extend out of the knife outlet 18, and the cutter 19 moves downward relative to the set 21; when the set 21 moves to the end away from the winding table 2, the lever 25 corresponds to the interval left by the other end of the limit strip 26, so the cutter 19 pops out of the set 21 again, and at the same time, the set 21 is closest to the knife outlet 18, and the cutter 19 extends out of the knife outlet 18 to the maximum length, and the cycle continues.

[0044] As the preferred technical scheme of this embodiment, a first gear 27 is rotatably arranged inside the winding wheel 3, and the first gear 27 is meshingly connected with a first rack 28, one end of the first rack 28 slides out of the end face of the winding wheel 3 close to the winding platform 2 and is movably connected with the winding platform 2, the first gear 27 is coaxially connected with a second gear 29, the second gear 29 is meshingly connected with a second rack 30, and one end of the second rack 30 is slidably connected with the kit 21. Specifically, the moving range of the winding wheel 3 relative to the winding platform 2, that is, the winding range of the hollow fiber ultrafiltration membrane on the winding wheel 3, the range of the knife edge 18 is larger than the winding range of the hollow fiber ultrafiltration membrane, and the moving range of the cutter 19 must cover the winding range of the hollow fiber ultrafiltration membrane to ensure that all wound hollow fiber ultrafiltration membranes are cut off; the kit 21 is linked to the movement of the winding wheel 3, and the kit 21 needs to be in the movable groove 20 The moving speed inside is greater than the moving speed of the winding wheel 3 relative to the winding table 2; the diameter of the first gear 27 is smaller than the second gear 29, and the transmission ratio matches the ratio of the moving range of the winding wheel 3 and the moving range of the cutter 19; the extension directions of the first rack 28 and the second rack 30 are parallel to the axial direction of the winding wheel 3; a rolling block is fixedly provided at one end of the first rack 28 extending out of the winding wheel 3, and an annular groove matching the rolling block is provided on the side wall of the winding table 2, and the axis of the annular groove is coaxial with the axis of the winding wheel 3; when the winding wheel 3 rotates, the first rack 28 is driven to rotate, and the first rack 28 is kept embedded in the annular groove and slides through the rolling block, so that the first rack 28 keeps the length suspended outside the side wall of the winding table 2 fixed; the side wall of the kit 21 is provided with a guide block parallel to its extension direction, and the second rack 30 is provided with a guide sleeve movably connected to the guide block. In actual use, when the winding wheel 3 moves relative to the winding table 2, the first rack 28 moves axially relative to the winding wheel 3, and then meshes with the first gear 27 for transmission. The first gear 27 transmits the second rack 30 through the second gear 29, and the second rack 30 drives the kit 21 to move in the movable groove 20. The specific transmission direction is that when the winding wheel 3 approaches the winding table 2, the kit 21 moves away from the winding table 2 in the movable groove 20, and when the winding wheel 3 moves away from the winding table 2, the kit 21 moves towards the winding table 2 in the movable groove 20.

[0045] In another embodiment of the present invention, a wire locker 31 is provided on the winding table 2, and a pressure switch 32 electrically connected to the wire locker 31 is provided on the winding table 2. The pressure switch 32 is triggered when the winding wheel 3 approaches the winding table 2 to collide with each other. An unlocking switch 33 is provided on the wire locker 31. Specifically, the hollow fiber ultrafiltration membrane between the winding wheel 3 and the fixed pulley 4 is arranged through the wire locker 31; after the hollow fiber ultrafiltration membrane is cut off on the winding wheel 3, its lead-out end loses the fixation with the winding wheel 3, and the setting of the wire locker 31 can be used when the winding wheel 3 moves close to the winding table 2 and until it collide with the winding table 2, that is, the hollow fiber ultrafiltration membrane is cut off on the winding wheel 3. After a batch of hollow fiber ultrafiltration membrane windings are completed on the winding wheel 3, the pressure switch 32 can be triggered to lock the wire locker 31 to fix the hollow fiber ultrafiltration membrane inside it, and then the winding wheel 3 moves away from the winding platform 2. Even if the last wound hollow fiber ultrafiltration membrane is cut first, the cut hollow fiber ultrafiltration membrane is fixed by the wire locker 31 and will not fly away. When the winding wheel 3 is reset, the cut hollow fiber ultrafiltration is also removed from the equipment. Then, the lead-out end of a new hollow fiber ultrafiltration membrane can be manually fixed on the winding wheel 3, and the lock of the wire locker 31 can be unlocked by the unlocking switch 33, thereby facilitating the next batch of winding work.

[0046] A hollow fiber ultrafiltration membrane is produced based on the above winding production line, comprising a hollow fiber ultrafiltration membrane made of PVDF material and arranged in a hollow fiber tube shape.

[0047] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A winding production line, comprising a shaping tank (1), a winding platform (2) and a winding wheel (3), wherein a hollow fiber ultrafiltration membrane is drawn out of the shaping tank (1) and wound on the winding wheel (3), characterized in that: Also includes: Two fixed pulleys (4) are provided and are both rotatably connected to the winding platform (2); A drop frame (5) is fixedly arranged on the winding platform (2) and corresponds to the lower side between the two fixed pulleys (4), and a slide seat (6) is movably arranged on the drop frame; A movable pulley (7) is rotatably connected to the slide seat (6) and is provided with a counterweight; The hollow fiber ultrafiltration membrane between the shaping tank (1) and the winding wheel (3) is arranged in an M shape around the fixed pulleys (4) and the movable pulleys (7); A speed regulating assembly is arranged on the drop frame (5) and adjusts the speed of the winding wheel (3) by detecting the height of the slide seat (6); The winding platform (2) is provided with a fixed shaft (11), the winding wheel (3) is movably provided on the fixed shaft (11), and the winding platform (2) is provided with a driving component, the driving component can drive the winding wheel (3) to move back and forth along the axial direction of the fixed shaft (11), when the winding wheel (3) moves axially along the fixed shaft (11) and approaches the winding platform (2), the winding wheel (3) rotates synchronously to wind up the hollow fiber ultrafiltration membrane, and when the winding wheel (3) moves axially along the fixed shaft (11) and moves away from the winding platform (2), the winding wheel (3) does not rotate; The winding wheel (3) is provided with a knife outlet (18), and the hollow fiber ultrafiltration membranes that are wound around the winding wheel (3) all pass through the knife outlet (18). A cutter (19) is movably arranged in the knife outlet (18). The winding wheel (3) is provided with a linkage component that links the axial movement of the winding wheel (3) and the movement of the cutter (19). When the winding wheel (3) approaches the winding platform (2), the cutter (19) remains retracted into the knife outlet (18), and when the winding wheel (3) moves away from the winding platform (2), the cutter (19) remains extended out of the knife outlet (18) and moves along the knife outlet (18) to cut off the hollow fiber ultrafiltration membrane.

2. The winding production line according to claim 1, characterized in that: The speed regulating assembly comprises a detection area arranged on a drop frame (5), a deceleration sensor (8) and an acceleration sensor (9) for controlling the winding wheel (3) are arranged at the upper and lower ends of the detection area, and a trigger unit (10) matching the deceleration sensor (8) and the acceleration sensor (9) is arranged on the slide seat (6).

3. The winding production line according to claim 1, characterized in that: The driving assembly comprises a screw (12) rotatably arranged on a winding platform (2); a driving wheel (14) is coaxially connected to the screw (12) via a first one-way transmission member (13); an inner gear ring (15) meshing with the driving wheel (14) is coaxially arranged on the inner side of the winding wheel (3); a rotary plate (17) is coaxially connected to the inner side of the winding wheel (3) via a second one-way transmission member (16); and the screw (12) and the rotary plate (17) are threadedly connected.

4. The winding production line according to claim 1, characterized in that: The linkage assembly comprises a movable groove (20) arranged in the winding wheel (3), a sleeve (21) being movably arranged in the movable groove (20), a slider (22) being arranged on the outer wall of the sleeve (21), an inclined slide groove (23) matching the slider (22) being arranged on the inner wall of the movable groove (20), the cutter (19) being elastically and telescopically arranged on the sleeve (21), a limiting assembly for limiting the cutter (19) from popping out of the sleeve (21) when the winding wheel (3) approaches the winding platform (2), and the movement of the sleeve (21) in the movable groove (20) is linked to the movement of the winding wheel (3) relative to the winding platform (2).

5. The winding production line according to claim 4, characterized in that: The limiting assembly comprises a groove (24) arranged on the inner wall of the movable groove (20); a lever (25) which slides through the sleeve (21) is fixedly arranged on the side wall of the cutter (19); one end of the lever (25) extending out of the sleeve (21) extends into the groove (24); and a limiting strip (26) is arranged in the groove (24).

6. The winding production line according to claim 4, characterized in that: A first gear (27) is rotatably arranged inside the winding wheel (3), the first gear (27) is meshingly connected with a first rack (28), one end of the first rack (28) slides out of the end surface of the winding wheel (3) close to the winding platform (2) and is movably connected to the winding platform (2), the first gear (27) is coaxially connected with a second gear (29), the second gear (29) is meshingly connected with a second rack (30), and one end of the second rack (30) is slidably connected to the sleeve (21).

7. The winding production line according to claim 1, characterized in that: The winding platform (2) is provided with a wire locker (31), and the winding platform (2) is provided with a pressure switch (32) electrically connected to the wire locker (31). The pressure switch (32) is triggered when the winding wheel (3) approaches the winding platform (2) to abut against the wire locker (31), and the wire locker (31) is provided with an unlocking switch (33).

8. A hollow fiber ultrafiltration membrane produced based on the winding production line according to any one of claims 1 to 7, characterized in that: The invention comprises a hollow fiber ultrafiltration membrane which is made of PVDF material and is arranged in a hollow fiber tube shape.

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