Double-cantilever medical hollow fiber membrane curling device

Abstract

The utility model discloses a double-cantilever medical hollow fiber membrane curling device which comprises a spline transmission shaft, gear boxes, a rotating shaft, hobbing teeth and a base, a sliding rail is arranged on the base, a sliding block set is arranged on the front portion and the rear portion of the sliding rail respectively, a first gear box and a second gear box are installed on the front sliding block set and the rear sliding block set respectively, and the spline transmission shaft penetrates through the two gear boxes. A worm transmission structure is arranged in each gear box to transmit power of the spline transmission shaft to the rotating shaft, hobbing teeth are arranged on the rotating shaft, the two hobbing teeth on one side are opposite in rotating direction and meshed, a tow of the hollow fiber membrane is clamped between the two hobbing teeth to be bent, and corrugation pressing operation of the tow of the hollow fiber membrane is synchronously conducted from the two ends of the rotating shaft. And the balance of the rotating shaft is improved, meanwhile, the corrugation pressing efficiency can be improved, double-line operation is achieved, and layout can be more convenient for subsequent winding.

Description

Technical Field

[0001] This utility model belongs to the field of hollow fiber membrane technology, specifically relating to a double cantilever medical hollow fiber membrane winding device. Background Technology

[0002] Hollow fiber membranes are fibrous membranes with a self-supporting structure. They are a type of asymmetric membrane, where the dense layer can be located on the outer surface of the fiber (e.g., in reverse osmosis membranes) or on the inner surface (e.g., in microfiltration and ultrafiltration membranes). Hollow fiber membrane production involves preparing the external fiber solution and the internal core solution, extruding them, removing the core solution to form a hollow structure, and then performing cleaning, drying, and corrugating processes.

[0003] In the final corrugation operation, most existing corrugation equipment uses two toothed pressure rollers moving in opposite directions for bending. However, this method places high demands on the synchronization between the two pressure rollers; otherwise, the bending amplitude will be unsuitable, affecting the performance of the filament bundle and potentially causing filament breakage. Furthermore, the common structure involves installing pressure rollers at both ends and bending in the middle. This presents inconvenience for filament bundle installation and cleaning, and the vertical arrangement of the two pressure rollers makes controlling the distance between them difficult. Relying solely on middle pressing can easily lead to deformation and is also inefficient. Utility Model Content

[0004] To overcome the aforementioned shortcomings, the inventors of this utility model, through long-term exploration, experimentation, and continuous innovation, have proposed a double-cantilever medical hollow fiber membrane winding device. The two corrugating rollers use the same power transmission, ensuring consistent power speed and achieving good meshing. After adjustment, they can continuously cooperate for bending operations, resulting in a corrugated shape for the hollow fiber membrane bundles. This prevents meshing problems caused by misalignment, which could lead to excessive bending or breakage and flattening of the corrugations. The device uses a screw in conjunction with positive and negative threaded sleeves to allow the front and rear rollers to move closer or further apart, enabling rapid movement. The screw and thread have high precision control, and the distance can be conveniently controlled and limited via limit switches. The gap between the two corrugating rollers can be easily set and adjusted. Corrugating of the hollow fiber membrane bundles is performed synchronously from both ends of the rotating shaft. This improves the balance of the rotating shaft and enhances the efficiency of corrugating, enabling dual-line operation and facilitating subsequent winding.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A double-cantilever medical hollow fiber membrane curling device is provided. It includes a spline drive shaft, a gearbox, a rotating shaft, gear hobbing, and a base. A slide rail is provided on the base, and a slider assembly is respectively arranged at the front and rear of the slide rail. A first gearbox and a second gearbox are respectively installed on the front and rear slider assemblies. The spline drive shaft passes through the two gearboxes, and a worm gear transmission structure is provided in each gearbox to transmit power from the spline drive shaft to the rotating shaft. Gear hobbing is provided on the rotating shaft, with two gear hobbing on one side rotating in opposite directions and meshing. The hollow fiber membrane filaments are clamped and curled between the two gear hobbing.

[0006] A further preferred technical solution of the double cantilever medical hollow fiber membrane winding device according to the present invention is as follows: the worm gear transmission structure includes a moving helical gear and a fixed helical gear. The inner ring of the moving helical gear is provided with a protrusion corresponding to the spline of the spline transmission shaft. The moving helical gear is mounted on the spline transmission shaft to achieve axial sliding installation and radial fixed installation.

[0007] A further preferred technical solution of the double cantilever medical hollow fiber membrane winding device according to the present invention is: the threads of the fixed helical gear in the first gearbox and the fixed helical gear in the second gearbox are opposite, so that the rotation directions of the two hobbing teeth on one side are opposite.

[0008] A further preferred technical solution of the double cantilever medical hollow fiber membrane winding device according to the present invention is: the single-sided rolling teeth mesh with each other, the rolling teeth maintain a gap of 1.1mm-1.5mm, and the hollow fiber membrane filaments are clamped between the two rolling teeth on one side and are thus bent.

[0009] A further preferred technical solution of the double cantilever medical hollow fiber membrane curling device according to the present invention is: both ends of the rotating shaft are provided with rolling teeth, and the hollow fiber membrane passes through the two pairs of rolling teeth on both sides from top to bottom from both sides of the gearbox to achieve synchronous curling on both sides.

[0010] A further preferred technical solution of the double cantilever medical hollow fiber membrane winding device according to the present invention is as follows: a bearing is provided between the spline drive shaft and the rotating shaft and the gearbox wall, the bearing is fixedly installed on the gearbox, and the inner ring of the bearing on the spline drive shaft is set as a protrusion corresponding to the spline of the spline drive shaft, so as to realize axial sliding installation and radial fixed installation on the spline drive shaft.

[0011] A further preferred technical solution of the double cantilever medical hollow fiber membrane winding device according to the present invention is: a drive motor is provided, and the drive motor is connected to the end of the spline drive shaft to drive the spline drive shaft to rotate, thereby driving the gear hobbing to rotate.

[0012] A further preferred technical solution of the double cantilever medical hollow fiber membrane rolling device according to the present invention is as follows: the rolling teeth are protruding pressure teeth evenly arranged on the circumference of the cylinder, the pressure teeth are arranged in a radial straight line, the upper end of the pressure teeth is set as an arc shape, and the recess between the pressure teeth is also set as an arc structure.

[0013] A further preferred technical solution of the double cantilever medical hollow fiber membrane winding device according to the present invention is as follows: two tracks are arranged side by side on both sides of the base, and sliders are arranged synchronously on the two tracks. A sliding plate is installed on the slider group to form a slider group. A screw sleeve is fixedly installed at the bottom of the sliding plate. The screw sleeve cooperates with the screw rod to realize movement. The screw rod is connected to the adjusting motor.

[0014] A further preferred technical solution of the double cantilever medical hollow fiber membrane winding device according to the present invention is as follows: a positive threaded sleeve and a negative threaded sleeve are respectively provided on the sliders of the front and rear slider groups, and the positive threaded sleeve and the negative threaded sleeve are fitted on the screw, so that the slider groups move closer or further apart from each other through the rotation of the screw.

[0015] Compared with the prior art, the technical solution of this utility model has the following advantages / benefits:

[0016] 1. The two corrugated rollers use the same power transmission to ensure consistent power speed and achieve good meshing. After adjustment, they can work together for a long time to perform bending operations, so that the hollow fiber membrane filaments are corrugated. Meshing problems will not occur due to fit issues, resulting in excessive bending of the corrugations or being pinched and flattened. The filaments are transported from top to bottom, which can achieve good spacing control capability, and the filament corrugations are regular and continuous.

[0017] 2. By using a screw in conjunction with positive and negative thread sleeves, the front and rear hobbing teeth can move closer or further apart, allowing for rapid movement. At the same time, the screw and thread have high precision control, and the distance can be conveniently controlled and limited by a limit switch. The gap between the two corrugated hobbing teeth can be easily set and adjusted.

[0018] 3. The hollow fiber membrane bundles are corrugated simultaneously from both ends of the shaft. This improves the balance of the shaft and the efficiency of corrugation, enabling dual-line operation and making subsequent winding easier. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a double-cantilever medical hollow fiber membrane curling device according to the present invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of the gearbox of a double-cantilever medical hollow fiber membrane winding device according to this utility model.

[0022] Figure 3 This is a schematic diagram of the base portion of a double-cantilever medical hollow fiber membrane curling device according to this utility model.

[0023] Figure 4 This is a cross-sectional schematic diagram of the rolling teeth of a double-cantilever medical hollow fiber membrane winding device according to this utility model.

[0024] The markings in the diagram are as follows: 1. Spline drive shaft 2. Gearbox 201. Moving helical gear 202. Fixed helical gear 203. Bearing 3. Rotating shaft 4. Hobbing gear 401. Pressing gear 5. Base 501. Slide rail 502. Slider 503. Screw 504. Adjusting motor 6. Screw sleeve 601. Positive screw sleeve 602. Negative screw sleeve 7. Drive motor 8. Limit switch. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the detailed description of the embodiments of this utility model provided below is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

[0027] Example:

[0028] like Figures 1-4As shown, a double-cantilever medical hollow fiber membrane winding device includes a spline drive shaft 1, a gearbox 2, a rotating shaft 3, gear hobbing 4, and a base 5. A slide rail 501 is mounted on the base 5, with a set of sliders 502 positioned at the front and rear of the slide rail 501. A first gearbox 2 and a second gearbox 2 are respectively mounted on the front and rear sliders 502. The spline drive shaft 1 passes through the two gearboxes 2. Each gearbox 2 contains a worm gear transmission structure that transmits power from the spline drive shaft 1 to the rotating shaft 3. Gear hobbing 4 is mounted on the rotating shaft 3, with two gear hobbing 4 on one side rotating in opposite directions and meshing. The hollow fiber membrane fibers are wound from the two gears... The hollow fiber membrane filaments are clamped and bent between the teeth 4. They are conveyed from top to bottom and pressed from the side, which can achieve better stability. At the same time, the two sides are pressed and curled in a balanced manner, which can improve efficiency and ensure the overall balance of operation, achieving a better bending effect. The two roller teeth 4 can be opened directly by adjusting the motor 504, which can quickly guide the filaments to be clamped. If a break occurs, the broken filament can be quickly removed. The position can be adjusted by using the limit switch 8, which can quickly close and maintain a stable gap between the two roller teeth 4.

[0029] The worm gear transmission structure includes a moving helical gear 201 and a fixed helical gear 202. The inner ring of the moving helical gear 201 has a protrusion corresponding to the spline of the spline drive shaft 1. The moving helical gear 201 is fitted onto the spline drive shaft 1 to achieve axial sliding installation and radial fixed installation. It should be noted that radial fixed installation means that rotation in a certain direction can be restricted by using the spline. Therefore, perfect matching in shape is not required, only matching in precision is required. At the same time, the axial sliding installation of the moving helical gear 201 on the spline drive shaft 1 requires a certain clearance to ensure smooth sliding. Therefore, as long as radial fixed installation and axial sliding can be satisfied, other structures can also be used. The spline structure actually serves as a guide rail and limiter.

[0030] The fixed helical gear 202 in the first gearbox 2 and the fixed helical gear 202 in the second gearbox 2 have opposite threads, so that the two hobbing teeth 4 on one side rotate in opposite directions, thus achieving the clamping and bending of the filament bundle.

[0031] The single-sided rolling teeth 4 mesh with each other, and the gap between the rolling teeth 4 is 1.1mm-1.5mm. The hollow fiber membrane filaments are clamped between the two rolling teeth 4 on one side and pass through to achieve compression. The gap can be adjusted according to actual needs. For example, if the filaments are thinner, the gap can be adjusted to 0.1mm. When the filaments pass through, it is best to keep a single layer passing through, or the number of overlapping layers can be low.

[0032] Both ends of the rotating shaft 3 are equipped with roller teeth 4. The hollow fiber membrane passes through the two pairs of roller teeth 4 from top to bottom on both sides of the gearbox 2 to achieve synchronous bending on both sides. The setting at both ends can realize the bending operation of dual stations. At the same time, the side of the roller teeth 4 is open, which makes it easy to install the fiber bundle and clean it after breakage.

[0033] A bearing 203 is provided between the spline drive shaft 1 and the rotating shaft 3 and the gearbox 2. The bearing 203 is fixedly installed on the gearbox 2. The inner ring of the bearing on the spline drive shaft 1 is set as a protrusion corresponding to the spline of the spline drive shaft 1, so as to realize axial sliding installation and radial fixed installation on the spline drive shaft 1. The bearing 203 serves to facilitate rotation, while not interfering with the movement of the gearbox 2. Its specific installation structure is only required to be reasonable.

[0034] A drive motor 7 is provided, which is connected to the end of the spline drive shaft 1 to drive the spline drive shaft 1 to rotate, thereby driving the hobbing gear 4 to rotate. The connection between the drive motor 7 and the spline drive shaft 1 can be made through a universal joint, which reduces the coaxiality requirement of the drive motor 7 during installation. It can also serve as a safety device, protecting the motor from burning out when the wire bundle gets stuck, and preventing the hobbing gear 4 from flying off if the universal joint breaks completely. Similarly, the adjustment motor 504 can also be installed using a universal joint.

[0035] The gear hobbing 4 is formed by uniformly setting protruding pressing teeth 401 on the circumference of a cylinder. The pressing teeth 401 are arranged in a straight line along the radial direction. The upper end of the pressing teeth 401 is set as an arc shape, and the recess between the pressing teeth 401 is also set as an arc structure. The pressing teeth 401 and the recessed arc shape can be combined to bend the arc shape of the filament bundle into a perfect arc ripple.

[0036] Two rails are arranged side by side on both sides of the base 5. Slider 502 is arranged synchronously on the two rails. A sliding plate is installed on the slider 502 group to form a slider 502 group. The two sliding rails 501 can ensure the stability of the sliding. The bottom of the sliding plate is fixedly installed with a screw sleeve 6. The screw sleeve 6 cooperates with the screw 503 to realize the movement. The screw 503 is connected to the adjusting motor 504.

[0037] The sliders 502 on the front and rear slider groups are respectively provided with positive thread sleeves 601 and negative thread sleeves 602. The positive thread sleeves 601 and negative thread sleeves 602 are fitted on the screw 503, so that the slider groups 502 move closer or further apart from each other by rotating the screw 503, thereby adjusting the distance between the hobbing teeth 4 and enabling the rapid opening and closing of the hobbing teeth 4.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A double-cantilever medical hollow fiber membrane winding device, characterized in that, It includes a spline drive shaft, a gearbox, a rotating shaft, gear hobbing, and a base. A slide rail is provided on the base, and a slider group is set at the front and rear of the slide rail. A first gearbox and a second gearbox are respectively installed on the front and rear slider groups. The spline drive shaft passes through the two gearboxes. A worm gear transmission structure is provided in each gearbox to transmit power from the spline drive shaft to the rotating shaft. Gear hobbing is provided on the rotating shaft. Two gear hobbing on one side rotate in opposite directions and mesh. The filaments of the hollow fiber membrane are clamped and bent between the two gear hobbing.

2. The double-cantilever medical hollow fiber membrane winding device according to claim 1, characterized in that, The worm gear transmission structure includes a moving helical gear and a fixed helical gear. The inner ring of the moving helical gear is provided with a protrusion corresponding to the spline of the spline transmission shaft. The moving helical gear is fitted on the spline transmission shaft to achieve axial sliding installation and radial fixed installation.

3. The double-cantilever medical hollow fiber membrane winding device according to claim 2, characterized in that, The threads of the fixed helical gear in the first gearbox and the fixed helical gear in the second gearbox are opposite, so that the rotation directions of the two hobbing gears on one side are opposite.

4. A double-cantilever medical hollow fiber membrane winding device according to claim 1 or 3, characterized in that, The single-sided rolling teeth mesh with each other, maintaining a gap of 1.1mm-1.5mm between them. The filaments of the hollow fiber membrane are clamped between the two rolling teeth on one side and are bent.

5. The double-cantilever medical hollow fiber membrane winding device according to claim 4, characterized in that, Both ends of the rotating shaft are equipped with hobbing teeth. The hollow fiber membrane passes through the two pairs of hobbing teeth on both sides from top to bottom from both sides of the gearbox to achieve synchronous bending on both sides.

6. The double-cantilever medical hollow fiber membrane winding device according to claim 1, characterized in that, Bearings are installed between the spline drive shaft and the shaft and the gearbox wall. The bearings are fixedly mounted on the gearbox. The inner ring of the bearing on the spline drive shaft is set with a protrusion corresponding to the spline of the spline drive shaft, so as to achieve axial sliding installation and radial fixed installation on the spline drive shaft.

7. The double-cantilever medical hollow fiber membrane winding device according to claim 1, characterized in that, It is equipped with a drive motor, which is connected to the end of the spline drive shaft to drive the spline drive shaft to rotate, thereby driving the gear hobbing to rotate.

8. The double-cantilever medical hollow fiber membrane winding device according to claim 1, characterized in that, The gear hobbing is characterized by uniformly arranged protruding pressure teeth on the circumference of a cylinder, with the pressure teeth arranged in a radial straight line. The upper end of the pressure teeth is set as an arc shape, and the recesses between the pressure teeth are also set as an arc structure.

9. The double-cantilever medical hollow fiber membrane winding device according to claim 1, characterized in that, Two tracks are arranged side by side on both sides of the base, and sliders are simultaneously set on the two tracks. A sliding plate is installed on the slider group to form a slider group. A screw sleeve is fixedly installed at the bottom of the sliding plate. The screw sleeve cooperates with the screw rod to realize movement. The screw rod is connected to the adjustment motor.

10. A double-cantilever medical hollow fiber membrane winding device according to claim 9, characterized in that, The sliders on the front and rear slider groups are respectively equipped with positive and negative threaded sleeves. The positive and negative threaded sleeves are fitted onto the screw, so that the slider groups move closer or further apart to each other through the rotation of the screw.

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