A hollow fiber membrane sheet preparation process

Abstract

The present invention discloses a hollow fiber membrane sheet preparation process, which includes the following steps: firstly winding a plurality of formed hollow fiber membranes on a membrane winding shaft, then rolling and pulling them onto a membrane cutting table via a membrane guide roller, being cut off by a membrane cutting blade, and then being rolled and conveyed onto a conveyor belt by a membrane conveying belt until sliding onto an assembly table, being assembled onto a water collecting pipe by a worker, and then being conveyed onto a pipe rack, and starting a long-range servo electric cylinder to drive a pipe cleaning sleeve to rotate and insert into the water collecting pipe, and cutting off the end of the hollow fiber membrane with colloid. The present invention uses a cleaning mechanism to support a water collecting pipe equipped with a hollow fiber membrane by a pipe rack, and starts a long-range servo electric cylinder to drive a spiral rod and a pipe cleaning sleeve to rotate synchronously and extend into the water collecting pipe, and smoothly cuts off the protruding hollow fiber membrane in the water collecting pipe, thereby removing the part with colloid inserted at one time, which is trouble-saving and time-saving, has a high degree of automation, and has practical value.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment and its recycling, and in particular to a hollow fiber membrane sheet preparation process. Background Art

[0002] The forming process of hollow fiber membrane is as follows: first, the filtered casting liquid composed of polymer, solvent and pore-forming agent is pressed out of the kettle with nitrogen gas, and squeezed out from the gap of the annular spinneret, and the membrane liquid is injected into the spinneret insertion tube. After a period of air bath, the casting liquid is immersed in the coagulation bath for double diffusion. The gelation process occurs simultaneously on the inside and outside of the membrane. When the critical concentration is reached, the membrane is completely solidified and precipitated from the coagulation bath, and the solvent and pore-forming agent in the membrane are extracted, and finally a hollow fiber membrane is obtained.

[0003] After the hollow fiber membrane is formed, it needs to be cut off and sealed upper water collecting pipes are assembled at both ends to form a channel for filtering sewage. In the existing assembly process, there is a phenomenon that colloid blocks the ends of the hollow fiber membrane, which is troublesome to dredge and difficult to clean, resulting in a discount in the utilization rate of the hollow fiber membrane. Summary of the invention

[0004] The purpose of the present invention is to provide a hollow fiber membrane sheet preparation process to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides a hollow fiber membrane sheet preparation process, comprising the following steps:

[0006] 1. Film cutting stage:

[0007] S1, firstly winding a number of hollow fiber membranes prepared and formed on a membrane winding shaft in a hollow fiber membrane sheet preparation device;

[0008] S2, then pulling out a plurality of hollow fiber membranes and passing them through a pair of film guide rollers, and then extending them between a pair of film cutting stations;

[0009] S3, then start the servo motor to drive a pair of film guide rollers to rotate in opposite directions, and roll a plurality of hollow fiber membranes to move forward between a pair of film transport belts;

[0010] S4, restarting the reduction motor to drive the film conveying belt to circulate and pull a number of hollow fiber membranes to move toward the conveyor belt;

[0011] S5, when a number of hollow fiber membranes are moved onto the conveyor belt, the short-range servo electric cylinder is started to drive the push block to move forward, thereby pushing a pair of membrane cutting blades to contact each other to cut off a number of hollow fiber membranes;

[0012] 2. Moulding stage:

[0013] S6, then start the conveying motor to drive the conveyor belt to circulate, thereby driving a number of hollow fiber membranes to move to the assembly table and stop;

[0014] S7, then put the water collecting pipe with colloid in the water collecting tank and the ends of several hollow fiber membranes, and make the ends of the hollow fiber membranes touch the inner wall of the water collecting pipe;

[0015] S8, then moving the hollow fiber membrane assembly in S7 to a conveyor belt and transferring it therewith;

[0016] 3. Glue cleaning stage:

[0017] S9, take down the hollow fiber membrane assembly at the front end of the conveyor belt and place it on a pipe rack;

[0018] S10, then start the long-range servo electric cylinder to drive the spiral rod and the cleaning sleeve to move forward synchronously;

[0019] S11. After the spiral rod passes through the guide port, the cleaning sleeve rotates and is inserted into the water collecting pipe, cutting off the end of the hollow fiber membrane with colloid in the water collecting pipe.

[0020] As a further improvement of the present technical solution, the hollow fiber membrane mold preparation device includes a film rolling mechanism for separating and winding a plurality of hollow fiber membranes, a film cutting mechanism for cutting a plurality of hollow fiber membranes, a film transport belt arranged above and below the film cutting mechanism, and a conveying mechanism arranged in front of a pair of film transport belts, the film rolling mechanism includes a film rolling shaft, a bracket arranged at both ends of the film rolling shaft, a plurality of film dividing sheets are arranged on the outside of the film rolling shaft and at equal intervals along its axial direction, the film cutting mechanism includes a film cutting table symmetrically arranged at upper and lower intervals, a film cutting blade is arranged on the outer side of the film cutting table, a push block arranged in the middle of the film cutting blade for pushing it through the film cutting table, and a short-stroke servo electric cylinder arranged at the outer end of the push block, the conveying mechanism includes a conveyor belt, an assembly table embedded in the middle of the conveyor belt, a conveying frame sleeved at both ends of the conveyor belt, and a conveying motor coaxially connected to the conveying frame, a water collecting pipe sleeved with the ends of a plurality of hollow fiber membranes is placed on the assembly table, the two ends of the water collecting pipe are open and a water collecting trough is connected to one radial side.

[0021] As a further improvement of the technical solution, film guide rollers are embedded between the brackets and distributed up and down, and the same ends of a pair of film guide rollers are tightly sleeved with mutually meshing transmission gears, and the end of one of the film guide rollers is coaxially connected to a servo motor, and the minimum spacing between a pair of film cutting tables is equal to the minimum spacing between a pair of film guide rollers and are at the same horizontal height.

[0022] As a further improvement of the present technical solution, one end of the film cutting platform is embedded in the bracket, and the other end thereof is provided with an extension rod, a straight rod frame is embedded in the outer side of the extension rod, a cutting groove for plugging with the film cutting blade is opened on the top surface of the film cutting platform, plug posts are welded on both side ends of the film cutting blade located above, and hanging posts are welded on both side ends of the film cutting blade located below, compression springs are sleeved on the outer sides of the plug posts and the hanging posts, and holes are symmetrically opened on the top surface of the film cutting platform.

[0023] As a further improvement of the technical solution, a rectangular opening is opened in the middle of the film cutting blade, the cross section of the push block is a right triangle and a rectangular pressure block is provided at the outer end of its horizontal top surface, and the pressure block is plugged into the opening.

[0024] As a further improvement of the present technical solution, a plurality of convex strips are bonded to the outside of the film conveyor belt at equal intervals along its width direction, the number of the convex strips is four, and a pair of film conveyor belts are provided with belt splitting frames at both ends, and one end of one of the belt splitting frames is coaxially connected to a reduction motor.

[0025] As a further improvement of the present technical solution, a number of belt winding shafts for folding and pressing the conveyor belt to sink are symmetrically embedded in the middle upper layer of the conveyor belt, and a film guide plate with a top surface flush with the film transport belt is provided at one end of the conveyor belt facing the film transport belt, and the other end of the film guide plate is flush with the top surface of the film transport belt located below.

[0026] As a further improvement of the present technical solution, a rubber cleaning mechanism is arranged on the outside of the front end of the conveyor belt, and the rubber cleaning mechanism includes a pipe rack arranged at the same height for placing a pair of water collecting pipes, a pipe cleaning sleeve arranged on one side of the pipe rack and used to be inserted into the center hole of the water collecting pipe and can rotate, and a waste box arranged on the other side of the pipe rack, and the end face of the pipe cleaning sleeve facing away from the pipe rack is coaxially connected with a long-stroke servo electric cylinder for driving the pipe cleaning sleeve to reciprocate along its axial direction.

[0027] As a further improvement of the present technical solution, a U-shaped support frame is arranged below the long-stroke servo electric cylinder, and a guide rotary sleeve is fixed to the support frame on a vertical side facing the pipe rack. A rectangular guide rotary opening is opened in the center of the top end face of the guide rotary sleeve, and a spiral rod connected to the guide rotary opening is welded in the center of the closed end of the pipe cleaning sleeve.

[0028] As a further improvement of the present technical solution, the top of the pipe rack is a U-shaped block structure and is symmetrically arranged in two rows. The water collecting pipe is snap-fitted with the U-shaped block on the top of the pipe rack, and a limiting ring is bonded inside the U-shaped block away from the cleaning sleeve, and the inner diameter of the limiting ring is equal to the inner diameter of the water collecting pipe.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. In the hollow fiber membrane sheet preparation process, the formed hollow fiber membrane is separated and wound by a membrane winding mechanism, and is rolled forward by a membrane guide roller to a membrane cutting table, and then the hollow fiber membrane is cut by a membrane cutting blade, and is rolled forward by a membrane transport belt to a conveyor belt and transported to an assembly table to be assembled with a water collecting pipe to form a hollow fiber membrane sheet. It has a high degree of automation, reduces the labor intensity of the staff, and has practical value.

[0031] 2. In the hollow fiber membrane sheet preparation process, a cleaning mechanism is arranged at the outer end of the conveyor belt, a pipe rack is used to support the water collecting pipe equipped with the hollow fiber membrane, and a long-range servo electric cylinder is started to drive the spiral rod and the pipe cleaning sleeve to synchronously extend into the water collecting pipe. At the same time, the spiral rod is driven to drive the pipe cleaning sleeve to rotate through the guiding effect of the guide mouth, and the protruding hollow fiber membrane in the water collecting pipe is smoothly cut off, thereby removing the part with the colloid inserted at one time. It saves trouble and time, has a high degree of automation, and has practical value.

[0032] 3. In the hollow fiber membrane sheet preparation process, an assembly table is set at the sinking section in the middle of the conveyor belt, so that several hollow fiber membranes on the conveyor belt can slide onto the assembly table and stop, and be assembled on the collecting pipe by the staff, and then the assembly is transferred to the conveyor belt and continued to be transported to the glue cleaning mechanism for cutting. The assembly efficiency is high, which saves the time of the staff to transfer the assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the overall combined structure of Example 1;

[0034] Figure 2 This is a schematic diagram of the film rolling mechanism assembly structure of Example 1;

[0035] Figure 3 This is a disassembled diagram of the film roll shaft of Example 1;

[0036] Figure 4 This is a schematic diagram of the film guide roller assembly structure of Example 1;

[0037] Figure 5 This is a schematic diagram of the assembly structure of the film cutting mechanism of Example 1;

[0038] Figure 6 This is a disassembled diagram of a pair of film cutting blades in Example 1;

[0039] Figure 7 This is a schematic diagram of the film cutting station structure of Example 1;

[0040] Figure 8 This is a schematic diagram of the film conveying belt assembly structure of Example 1;

[0041] Fig. 9 This is a disassembled diagram of the film conveying belt of Example 1;

[0042] Fig.10 It is a schematic diagram of the combined assembly structure of the conveying mechanism and the cleaning mechanism of Example 1;

[0043] Fig.11 This is a schematic diagram of the assembly structure of the water collecting pipe and the fiber membrane of Example 1;

[0044] Fig.12 This is a schematic diagram of the assembly structure of the conveying mechanism of Example 1;

[0045] Fig.13 This is a disassembled diagram of the conveyor belt of Example 1;

[0046] Fig.14 It is a schematic diagram of the partial assembly structure of the glue cleaning mechanism of Example 1;

[0047] Fig.15 This is a disassembled diagram of the pigging set of Example 1;

[0048] Fig.16 This is a schematic diagram of the pipe rack structure of Example 1.

[0049] The meaning of each number in the figure is:

[0050] 100, film rolling mechanism; 110, film rolling shaft; 111, film separation sheet; 112, bracket; 120, film guide roller; 121, transmission gear; 130, servo motor;

[0051] 140, film cutting mechanism; 141, film cutting platform; 1411, cutting groove; 1412, plug hole; 1413, extension rod; 142, film cutting blade; 1421, through hole; 1422, plug column; 1423, compression spring; 1424, hanging column; 143, short-stroke servo electric cylinder; 144, push block; 1441, pressure block; 145, straight rod frame;

[0052] 200, film conveying belt; 201, convex strip; 210, belt dividing frame; 220, reduction motor;

[0053] 300, conveying mechanism; 310, conveyor belt; 311, conveying frame; 312, conveying motor; 313, belt winding shaft; 320, assembly table; 330, water collecting pipe; 331, water collecting tank; 340, film guide plate;

[0054] 400, glue cleaning mechanism; 410, pipe rack; 411, limit ring; 420, pipe cleaning sleeve; 421, screw rod; 430, long-stroke servo electric cylinder; 440, support frame; 441, guide sleeve; 4411, guide mouth; 450, waste box. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] In the description of the present invention, it should be understood that the terms "central axis", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In addition, in the description of the present invention, “several” means two or more than two, unless otherwise clearly and specifically defined. Example

[0058] See also Figure 1-Figure 16 As shown, the present invention provides a hollow fiber membrane sheet preparation process, comprising the following steps:

[0059] 1. Film cutting stage:

[0060] S1, firstly wind a plurality of hollow fiber membranes formed into a certain number on a membrane winding shaft 110 in a hollow fiber membrane sheet preparation device;

[0061] S2, then a plurality of hollow fiber membranes are pulled out and passed through a pair of film guide rollers 120, and then extended to a pair of film cutting stages 141;

[0062] S3, then start the servo motor 130 to drive the pair of film guide rollers 120 to rotate in opposite directions, and roll a plurality of hollow fiber membranes to move forward between a pair of film transport belts 200;

[0063] S4, restarting the reduction motor 220 to drive the film conveying belt 200 to circulate and pull a plurality of hollow fiber membranes to move toward the conveyor belt 310;

[0064] S5, when a plurality of hollow fiber membranes are moved onto the conveyor belt 310, the short-range servo electric cylinder 143 is started to drive the push block 144 to move forward, thereby pushing a pair of membrane cutting blades 142 to contact each other to cut off a plurality of hollow fiber membranes, and the cut hollow fiber membranes on the film winding shaft 110 will continue to move between the film conveyor belts 200 under the rolling action of the rotating film guide roller 120, so as to be clamped by the convex strips 201 on the moving film conveyor belt 200 and move onto the conveyor belt 310;

[0065] 2. Moulding stage:

[0066] S6, then start the conveying motor 312 to drive the conveyor belt 310 to circulate, thereby driving a number of hollow fiber membranes to move to the assembly platform 320 and stop. Since the assembly platform 320 is suspended on the conveyor belt 310, it is used to install the water collecting pipe 330;

[0067] S7, then put the water collecting pipe 330 with colloid in the water collecting tank 331 and the ends of the hollow fiber membranes, and make the ends of the hollow fiber membranes touch the inner wall of the water collecting pipe 330, so that the hollow fiber membranes and the water collecting tank 331 are sealed and watertight, and the sewage can only flow and filter between the water collecting pipe 330 and the hollow fiber membranes;

[0068] S8, then moving the hollow fiber membrane assembly in S7 to the conveyor belt 310 and transferring it therewith;

[0069] 3. Glue cleaning stage:

[0070] S9, remove the hollow fiber membrane assembly from the front end of the conveyor belt 310 and place it on the pipe rack 410, that is, insert both ends of the water collecting pipe 330 into the U-shaped block on the top of the pipe rack to stably suspend it;

[0071] S10, then start the long-range servo electric cylinder 430 to drive the screw rod 421 and the pig sleeve 420 to move forward synchronously;

[0072] S11. After the spiral rod 421 passes through the guide port 4411, the cleaning sleeve 420 rotates and is inserted into the water collecting pipe 330, cutting off the end of the hollow fiber membrane with colloid in the water collecting pipe 330, thereby removing the colloid in the end of the hollow fiber membrane, opening up the hollow fiber membrane and the inside of the water collecting pipe 330, and finally forming a hollow fiber membrane sheet.

[0073] In this embodiment, the hollow fiber membrane mold preparation device includes a film rolling mechanism 100 for separating and winding a plurality of hollow fiber membranes, a film cutting mechanism 140 for cutting a plurality of hollow fiber membranes, a film conveying belt 200 arranged above and below the film cutting mechanism 140, and a conveying mechanism 300 arranged in front of a pair of film conveying belts 200, which mainly separates and winds a plurality of hollow fiber membranes through the film rolling mechanism 100, and automatically conveys them to the film cutting mechanism 140 to be cut off, so as to form a hollow fiber membrane sheet for subsequent assembly of water pipes. The film rolling mechanism 100 includes a film rolling shaft 110, a bracket 112 arranged at both ends of the film rolling shaft 110, and a rectangular notch is provided on the top of the bracket 112 so as to be clamped with the two ends of the film rolling shaft 110, and is used to support the film rolling shaft 110 to rotate and roll and release a plurality of hollow fiber membranes. A plurality of film separation sheets 111 are arranged on the outside of the film rolling shaft 110 and at equal intervals along its axial direction, so that the hollow fiber membrane is wound between two adjacent film separation sheets 111. The film cutting mechanism 140 includes a film cutting platform 141 symmetrically arranged at an interval up and down, a film cutting blade 142 arranged on the outer side of the film cutting platform 141, a push block 144 arranged in the middle of the film cutting blade 142 for pushing it through the film cutting platform 141, and a short-range servo electric cylinder 143 arranged at the outer end of the push block. A plurality of hollow fiber membranes are moved between a pair of film cutting platforms 141 by using the film rolling mechanism 100, and are rolled forward by the film conveying belt 200, and then the short-range servo electric cylinder 143 is started to drive the push block 144 to move forward horizontally and press the pair of film cutting blades 142 to contact each other, thereby cutting off a plurality of hollow fiber membranes so that a water pipe can be assembled at its end later. The short-range servo electric cylinder 143 is fixed to the outer surface of the film cutting platform 141 by bolts to make it work stably. The conveying mechanism 300 includes a conveyor belt 310, an assembly platform 320 embedded in the middle of the conveyor belt 310, a conveying frame 311 sleeved at both ends of the conveyor belt 310, and a conveying motor 312 coaxially connected to the conveying frame 311. A water collecting pipe 330 sleeved with the ends of a plurality of hollow fiber membranes is placed on the assembly platform 320. The two ends of the water collecting pipe 330 are open and a water collecting tank 331 is connected to one radial side of the water collecting pipe 330. The assembly platform 320 does not contact the conveyor belt 310, so that the plurality of hollow fiber membranes on the conveyor belt 310 slide onto the assembly platform 320 and stop, and are assembled with the water collecting pipe 330 by the staff.

[0074] Furthermore, film guide rollers 120 are embedded between the brackets 112 in an upper and lower distribution, and the same ends of a pair of film guide rollers 120 are tightly sleeved with mutually meshing transmission gears 121, and a servo motor 130 is coaxially connected to the end of one of the film guide rollers 120, that is, the servo motor 130 is started to drive the film guide roller 120 coaxially connected thereto to rotate, and the reverse transmission movement of the pair of transmission gears 121 causes the other film guide roller 120 to rotate in the opposite direction, thereby rolling the hollow fiber membrane and automatically moving forward. The minimum spacing of a pair of film cutting platforms 141 is equal to the minimum spacing of a pair of film guide rollers 120 and is at the same horizontal height, so that the hollow fiber membrane can be smoothly moved between the pair of film cutting platforms 141, and is contacted and cut off by a pair of film cutting blades 142 passing through each film cutting platform 141. A circular ring is welded on the end face of the output shaft of the servo motor 130, and a straight rod is welded between the circular ring and the side of the bracket 112, which is used to support the servo motor 130 without contacting the transmission gear 121, and can work stably.

[0075] Specifically, one end of the film cutting platform 141 is embedded in the bracket 112, and the other end is provided with an extension rod 1413, and a straight rod frame 145 is embedded outside the extension rod 1413, so that both ends of the film cutting platform 141 are supported and placed flat on one radial side of the film guide roller 120. The top surface of the film cutting platform 141 is provided with a cutting groove 1411 plugged with the film cutting blade 142, and the film cutting blade 142 is a rectangular parallelepiped structure and its long side close to the film cutting platform 141 is a triangular pointed blade shape. Inserting posts 1422 are welded to both side ends of the upper film cutting blade 142, and hanging posts 1424 are welded to both side ends of the lower film cutting blade 142. Compression springs 1423 are sleeved on the outer sides of the inserting posts 1422 and the hanging posts 1424. Inserting holes 1412 are symmetrically provided on the top surface of the film cutting platform 141. A round block with an enlarged outer diameter is provided on the top of the hanging post 1424 to serve as a suspension to prevent the film cutting blade 142 located below from falling. In addition, the bottom end of the inserting post 1422 is located in the inserting hole 1412, and the spacing between the inserting post 1422 and the hanging post 1424 is greater than half of the spacing between a pair of film cutting blades 142, so that after a pair of film cutting blades 142 come into contact, the inserting post 1422 does not come into contact with the hanging post 1424, thereby preventing obstruction and interference of the contact of the film cutting blades 142.

[0076] Specifically, a rectangular opening 1421 is provided in the middle of the film cutting blade 142, the cross-section of the push block 144 is a right triangle, and a pressure block 1441 with a rectangular structure is provided at the outer end of its horizontal top surface, the pressure block 1441 is plugged into the opening 1421, the inclined surface of the push block 144 contacts the bottom edge of the opening 1421, and the bottom edge of the opening 1421 has an inverted arc angle, so that when the push block 144 is translated into the opening 1421, it slides smoothly, and then uses the triangular inclined surface to press the film cutting blade 142, the film cutting blade 142 located above moves downward, and the film cutting blade 142 located below moves upward, when the push block 144 is reset under the drive of the short-stroke servo electric cylinder 143, the film cutting blade 142 is reset under the action of the rebound force of the compression spring 1423, and is separated from the cutting groove 1411.

[0077] Furthermore, a plurality of convex strips 201 are bonded to the outside of the film conveying belt 200 at equal intervals along its width direction. The number of convex strips 201 is four, and the convex strips 201 of a pair of film conveying belts 200 are symmetrically positioned so that the convex strips 201 on the film conveying belts 200 that move synchronously and in opposite directions can approach each other and clamp the hollow fiber membrane to pull it toward the conveyor belt 310. A belt splitter frame 210 is provided at both ends of the pair of film conveying belts 200, and a reduction motor 220 is coaxially connected to one end of one of the belt splitters 210. Round rollers that are tightly plugged into the round shaft on the belt splitter frame 210 are provided at both ends of the film conveying belt 200, and the belt splitter frame 210 is used to tighten and support the film conveying belt 200. The reduction motor 220 is fixedly connected to the end face of the belt splitter frame 210 by bolts to ensure stable operation.

[0078] Specifically, a plurality of belt winding shafts 313 for folding and pressing the conveyor belt 310 to sink are symmetrically embedded in the middle upper layer of the conveyor belt 310. There are four belt winding shafts 313, two of which are located outside the top surface of the upper layer of the conveyor belt 310, and the other two are located inside the top surface of the upper layer of the conveyor belt 310. The two belt winding shafts 313 on the same side are spaced vertically. The belt winding shaft 313 located outside the top surface of the upper layer of the conveyor belt 310 descends, and the assembly platform 320 is welded with straight rods at both ends across the conveyor belt 310. The ends of the belt winding shafts 313 are embedded in the top of the straight rods and can rotate, so that the middle part of the conveyor belt 310 is folded into a space for placing the assembly platform 320, and the top surface of the assembly platform 320 is flush with the top surface of the conveyor belt 310, so that the hollow fiber membrane can pass smoothly. A film guide plate 340 with a top surface flush with the film transport belt 200 is provided at one end of the conveyor belt 310, and the other end of the film guide plate 340 is flush with the top surface of the film transport belt 200 located below, so as to smoothly guide the hollow fiber membranes between the film transport belts 200 to move onto the conveyor belt 310, wherein the film guide plate 340 is welded to the round block of the belt dividing frame 210 close to the conveyor belt 310 and is stably suspended.

[0079] In addition, a rubber cleaning mechanism 400 is provided outside the front end of the conveyor belt 310. The rubber cleaning mechanism 400 includes a pipe rack 410 arranged at the same height for placing a pair of water collecting pipes 330, a pipe cleaning sleeve 420 arranged at one side of the pipe rack 410 and inserted into the central hole of the water collecting pipe 330 and rotatable, and a waste box 450 arranged at the other side of the pipe rack 410. The pipe cleaning sleeve 420 is cylindrical and one end is closed, and the other end is open and has an inverted bevel to form a thin edge, so as to quickly cut off the hollow fiber membrane protruding from the water collecting pipe 330. The waste box 450 is used to collect the hollow fiber membrane waste pushed out by the pipe cleaning sleeve 420 for centralized processing and reuse. The end face of the pipe cleaning sleeve 420 facing away from the pipe rack 410 is coaxially connected with a long-stroke servo electric cylinder 430 for driving the pipe cleaning sleeve 420 to reciprocate along its axial direction.

[0080] Specifically, a U-shaped support frame 440 is provided below the long-stroke servo electric cylinder 430. A circular plate is provided at one top end of the support frame 440 and fixedly connected to the long-stroke servo electric cylinder 430 by bolts. A square tube is welded to the other top end of the support frame 440 and sleeved with the long-stroke servo electric cylinder 430 to enable it to work stably. A guide swivel sleeve 441 is fixed to the vertical side of the support frame 440 facing the pipe rack 410 by bolts. A rectangular guide swivel opening 4411 is provided at the center of the top end face of the guide swivel sleeve 441. A spiral rod 421 plugged into the guide swivel opening 4411 is welded at the center of the closed end of the cleaning sleeve 420. The length of the spiral rod 421 is greater than the length of the water collecting pipe 330, and the other end of the spiral rod 421 is connected to the output shaft of the long-stroke servo electric cylinder 430.

[0081] Furthermore, the top of the pipe rack 410 is in a U-shaped block structure and is symmetrically arranged in two rows. The water collecting pipe 330 is snap-fitted with the U-shaped block on the top of the pipe rack 410, wherein a limiting ring 411 is bonded inside the U-shaped block away from the cleaning sleeve 420, and the inner diameter of the limiting ring 411 is equal to the inner diameter of the water collecting pipe 330, so as to resist the water collecting pipe 330, so that the cleaning sleeve 420 can be smoothly inserted into the water collecting pipe 330 to clean the end of the hollow fiber membrane with colloid inserted.

[0082] The bottoms of the bracket 112, the straight rod frame 145, the belt distribution frame 210, the conveying frame 311, the pipe frame 410 and the support frame 440 in this embodiment are all fixed to the ground by bolts, so that the mechanisms on them can operate stably.

[0083] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hollow fiber membrane sheet preparation process, characterized in that: The following steps are involved:

1. Film cutting stage: S1, firstly winding a plurality of hollow fiber membranes prepared and formed in equal numbers on a membrane winding shaft (110) in a hollow fiber membrane sheet preparation device; S2, then pulling out a plurality of hollow fiber membranes and passing them through a pair of membrane guide rollers (120), and then extending them to a pair of membrane cutting platforms (141); S3, then starting the servo motor (130) to drive the pair of film guide rollers (120) to rotate in opposite directions, and rolling a plurality of hollow fiber membranes to move forward between a pair of film transport belts (200); S4, restarting the reduction motor (220) to drive the film conveying belt (200) to circulate and pull the plurality of hollow fiber membranes toward the conveyor belt (310); S5, when the plurality of hollow fiber membranes are moved onto the conveyor belt (310), the short-stroke servo electric cylinder (143) is started to drive the push block (144) to move forward, thereby pushing the pair of membrane cutting blades (142) to contact each other and cut the plurality of hollow fiber membranes; 2. Moulding stage: S6, then starting the conveying motor (312) to drive the conveying belt (310) to circulate, thereby driving a plurality of hollow fiber membranes to move to the assembly platform (320) and stop; S7, then fitting the water collecting pipe (330) coated with colloid in the water collecting tank (331) and the ends of the plurality of hollow fiber membranes, and making the ends of the hollow fiber membranes contact the inner wall of the water collecting pipe (330); S8, then moving the hollow fiber membrane assembly in S7 to a conveyor belt (310) and transferring it therewith; 3. Glue cleaning stage: S9, taking down the hollow fiber membrane assembly at the front end of the conveyor belt (310) and placing it on the pipe rack (410); S10, then starting the long-stroke servo electric cylinder (430) to drive the spiral rod (421) and the cleaning sleeve (420) to move forward synchronously; S11. After the spiral rod (421) passes through the guide opening (4411), the cleaning sleeve (420) performs a rotational motion and is inserted into the water collecting pipe (330), thereby cutting off the end of the hollow fiber membrane with colloid in the water collecting pipe (330).

2. The hollow fiber membrane sheet preparation process according to claim 1, characterized in that: The hollow fiber membrane mold piece preparation device comprises a membrane rolling mechanism (100) for separating and winding a plurality of hollow fiber membranes, a membrane cutting mechanism (140) for cutting a plurality of hollow fiber membranes, a membrane conveying belt (200) arranged above and below the membrane cutting mechanism (140), and a conveying mechanism (300) arranged in front of a pair of membrane conveying belts (200), wherein the membrane rolling mechanism (100) comprises a membrane rolling shaft (110), brackets (112) arranged at both ends of the membrane rolling shaft (110), a plurality of membrane separation sheets (111) are arranged at equal intervals on the outside of the membrane rolling shaft (110) and along its axial direction, and the membrane cutting mechanism (140) comprises a membrane cutting table (141) arranged symmetrically at upper and lower intervals, and a membrane cutting table (141) facing the membrane cutting table (141). The outer side surface is provided with a film cutting blade (142), a push block (144) provided in the middle of the film cutting blade (142) for pushing the film cutting blade to pass through the film cutting platform (141), and a short-stroke servo electric cylinder (143) provided at the outer end of the push block. The conveying mechanism (300) comprises a conveyor belt (310), an assembly platform (320) embedded in the middle of the conveyor belt (310), a conveying frame (311) sleeved at both ends of the conveyor belt (310), and a conveying motor (312) coaxially connected to the conveying frame (311). A water collecting pipe (330) sleeved with the ends of a plurality of hollow fiber membranes is placed on the assembly platform (320). Both ends of the water collecting pipe (330) are open and one radial side thereof is connected to a water collecting tank (331).

3. The hollow fiber membrane sheet preparation process according to claim 2, characterized in that: Film guide rollers (120) are embedded between the brackets (112) in an upper and lower distribution, and the same ends of a pair of film guide rollers (120) are tightly sleeved with mutually meshing transmission gears (121), and the end of one of the film guide rollers (120) is coaxially connected to a servo motor (130), and the minimum spacing between the pair of film cutting tables (141) is equal to the minimum spacing between the pair of film guide rollers (120) and is at the same horizontal height.

4. The hollow fiber membrane sheet preparation process according to claim 2, characterized in that: One end of the film cutting platform (141) is embedded in the bracket (112), and the other end is provided with an extension rod (1413), and a straight rod frame (145) is embedded on the outer side of the extension rod (1413). The top surface of the film cutting platform (141) is provided with a cutting groove (1411) for plugging with the film cutting blade (142). The two side ends of the film cutting blade (142) located at the top are welded with plug posts (1422), and the two side ends of the film cutting blade (142) located at the bottom are welded with hanging posts (1424). The outer sides of the plug posts (1422) and the hanging posts (1424) are both sleeved with compression springs (1423). The top surface of the film cutting platform (141) is symmetrically provided with plug holes (1412).

5. The hollow fiber membrane sheet preparation process according to claim 2, characterized in that: A rectangular opening (1421) is provided in the middle of the film cutting blade (142); the push block (144) has a right triangle cross section and a rectangular parallelepiped pressure block (1441) is provided at the outer end of its horizontal top surface; the pressure block (1441) is plugged into the opening (1421).

6. The hollow fiber membrane sheet preparation process according to claim 2, characterized in that: A plurality of convex strips (201) are bonded to the outside of the film conveying belt (200) at equal intervals along its width direction, the number of the convex strips (201) being four, and a pair of film conveying belts (200) are provided with belt splitting frames (210) at both ends, one end of one of the belt splitting frames (210) being coaxially connected to a reduction motor (220).

7. The hollow fiber membrane sheet preparation process according to claim 2, characterized in that: A plurality of belt winding shafts (313) for folding and pressing the conveyor belt (310) downward are symmetrically embedded in the middle upper layer of the conveyor belt (310), and a film guide plate (340) with a top surface flush with the film transport belt (200) is provided at one end of the conveyor belt (310) facing the film transport belt (200), and the other end of the film guide plate (340) is flush with the top surface of the film transport belt (200) located below.

8. The hollow fiber membrane sheet preparation process according to claim 2, characterized in that: A rubber cleaning mechanism (400) is arranged outside the front end of the conveyor belt (310), and the rubber cleaning mechanism (400) comprises a pipe rack (410) arranged at the same height for placing a pair of water collecting pipes (330), a pipe cleaning sleeve (420) arranged at one end of the pipe rack (410) and used for inserting into the central hole of the water collecting pipe (330) and being rotatable, and a waste box (450) arranged at the other end of the pipe rack (410), and the end surface of the pipe cleaning sleeve (420) facing away from the pipe rack (410) is coaxially connected to a long-stroke servo electric cylinder (430) for driving the pipe cleaning sleeve (420) to reciprocate along its axial direction.

9. The hollow fiber membrane sheet preparation process according to claim 8, characterized in that: A U-shaped support frame (440) is arranged below the long-stroke servo electric cylinder (430); a guide rotary sleeve (441) is fixed to a vertical side of the support frame (440) facing the pipe rack (410); a rectangular guide rotary opening (4411) is provided at the center of the top end surface of the guide rotary sleeve (441); and a spiral rod (421) plugged into the guide rotary opening (4411) is welded at the center of the closed end of the cleaning sleeve (420).

10. The hollow fiber membrane sheet preparation process according to claim 9, characterized in that: The top of the pipe rack (410) is in a U-shaped block structure and is symmetrically arranged in two rows. The water collecting pipe (330) is snap-fitted with the U-shaped block on the top of the pipe rack (410), wherein a limiting ring (411) is bonded inside the U-shaped block away from the cleaning sleeve (420), and the inner diameter of the limiting ring (411) is equal to the inner diameter of the water collecting pipe (330).

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