A membrane filament bundle positioning device for potting of hollow fiber membrane modules
Patent Information
- Application Number
- CN202521954279.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-11
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-09-11
AI Technical Summary
[0004]本申请实施例提供了一种用于中空纤维膜组件灌封的膜丝束定位装置，以解决现有技术中因膜丝束定位精度差导致端面密封易失效、膜丝束易受损的问题
[0027] The membrane bundle positioning device for potting hollow fiber membrane modules provided in this application can ensure that the membrane bundle maintains a uniform distance from the inner wall of the membrane shell along the entire circumference (achieving centering positioning). The position of the membrane bundle can be finely adjusted by turning the positioning screw to ensure concentricity between the inside and outside. At the same time, the device of this application can ensure the firmness of the membrane bundle ends during the potting operation and resin curing process, preventing displacement or tilting. It avoids damage to the membrane bundle during the positioning process, significantly improving the yield.
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Figure CN224723934U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hollow fiber membrane module manufacturing technology, and in particular to a membrane bundle positioning device for potting hollow fiber membrane modules. Background Technology
[0002] Hollow fiber membrane modules are separation devices that use hollow fiber membrane filaments as the separation medium, and are widely used in water treatment, biopharmaceuticals, and medical fields. A hollow fiber membrane module mainly consists of hollow fiber membrane bundles, a shell, and end caps. During manufacturing, the filling process is the core step, its purpose being to seal the hollow fiber membrane bundles to the shell and fill the shell-side space to form a stable separation structure.
[0003] During the potting process, the geometric center of the membrane fiber bundle needs to be coaxial with the central axis of the housing to ensure component sealing and uniform fluid distribution. However, related technologies typically rely on operators manually adjusting the position of the membrane fiber bundle based on experience, or using retaining rings to rigidly fix the membrane fiber bundle. Such methods cannot achieve high positioning accuracy and stability, and are prone to causing the membrane fiber bundle to shift or be damaged during potting, thus significantly affecting the separation performance of the separation device. Utility Model Content
[0004] This application provides a membrane bundle positioning device for potting hollow fiber membrane modules, in order to solve the problems in the prior art where poor positioning accuracy of the membrane bundle leads to easy failure of end face seals and easy damage to the membrane bundle.
[0005] This application provides a membrane bundle positioning device for potting hollow fiber membrane modules, comprising:
[0006] A coating layer fitted around the periphery of the membrane fiber bundle;
[0007] A membrane shell is fitted over the outer side of the covering layer and is spaced apart from the covering layer; multiple positioning holes are provided at both ends of the membrane shell along the circumferential direction.
[0008] A positioning component is detachably connected to the membrane shell. The positioning component passes through the positioning hole and abuts against the surface of the covering layer so that the distance between any surface of the covering layer and the inner wall of the membrane shell is equal.
[0009] Based on this solution, the positioning component is detachably connected to the membrane shell and passes through the positioning hole to abut against the surface of the coating layer. By adjusting the magnitude and distribution of the abutting force, the distance between any surface of the coating layer and the inner wall of the membrane shell is made equal, thereby forcibly constraining the geometric center of the membrane bundle to be coaxial with the central axis of the membrane shell. The structured positioning component realizes the quantitative control of the position of the membrane bundle, which significantly improves the positioning accuracy and stability, effectively avoids the damage to the membrane bundle caused by displacement or uneven force during the potting process, and fundamentally ensures the sealing performance and fluid distribution uniformity of the hollow fiber membrane module after potting.
[0010] In some feasible embodiments, the positioning component includes:
[0011] An annular body is fitted onto the outer surface of the membrane shell and covers the positioning hole; the annular body has multiple threaded holes; each threaded hole corresponds to one positioning hole;
[0012] A positioning screw threadedly connected to the threaded hole; at least two of the positioning screws abut against the surface of the coating layer radially along the membrane fiber bundle.
[0013] Based on this scheme, the positions of multiple positioning holes are integrated by an annular body, ensuring that the distribution of positioning screws is uniformly matched with the circumference of the membrane shell. Combined with the adjustable characteristics of the threaded connection, the amount of resistance to the coating layer can be precisely adjusted by rotating the screws, achieving fine-tuning of the radial position of the membrane fiber bundle. Compared to the scheme of directly opening positioning holes on the membrane shell and fixing adjustment components, the cooperation between the annular body and the positioning screws significantly improves the convenience and repeatability of the positioning operation, ensures the uniformity of force on the membrane fiber bundle in all circumferential directions, and further enhances the coaxiality of the membrane fiber bundle and the central axis of the membrane shell.
[0014] In some feasible embodiments, the positioning screws comprise two sets, which abut against the surface of the covering layer along a first direction and a second direction, respectively, wherein the first direction is perpendicular to the second direction.
[0015] Based on this solution, compared to the solution that sets screws in only one direction, the vertical double-set screw design can cover all potential offset directions of the membrane fiber bundle radially, avoiding local offset residues caused by insufficient adjustment in one direction. This controls the coaxiality error between the geometric center of the membrane fiber bundle and the central axis of the membrane shell within a smaller range, significantly improving the reliability of the module separation performance after potting.
[0016] In some feasible embodiments, the positioning component further includes:
[0017] A positioning pad is disposed between the annular body and the positioning screw; the positioning screw passes through the positioning pad and abuts against the surface of the covering layer.
[0018] In some feasible embodiments, the covering layer is a mesh structure.
[0019] Based on this solution, flexible positioning of the membrane fiber bundle and full filling of the potting material are achieved, taking into account both positioning accuracy and potting quality.
[0020] In some feasible embodiments, an elastic pad is provided on the side of the annular body near the membrane shell.
[0021] Based on this solution, the installation position of the annular body is adaptively adjusted by the deformation of the rubber pad, ensuring that the positioning screw can accurately abut against the surface of the coating layer, further improving the adaptability of the device to membrane shells of different specifications.
[0022] In some feasible embodiments, the positioning washer is a nut or a flat washer.
[0023] In some feasible embodiments, the positioning screw is an internal hexagon screw.
[0024] In some feasible embodiments, the outer diameter of the positioning pad is larger than the diameter of the positioning hole.
[0025] In some feasible embodiments, at least one layer of the positioning pad is provided between the annular body and the positioning screw.
[0026] Based on this solution, it can be applied to various membrane fiber bundle positioning scenarios with different gap requirements.
[0027] The membrane bundle positioning device for potting hollow fiber membrane modules provided in this application can ensure that the membrane bundle maintains a uniform distance from the inner wall of the membrane shell along the entire circumference (achieving centering positioning). The position of the membrane bundle can be finely adjusted by turning the positioning screw to ensure concentricity between the inside and outside. At the same time, the device of this application can ensure the firmness of the membrane bundle ends during the potting operation and resin curing process, preventing displacement or tilting. It avoids damage to the membrane bundle during the positioning process, significantly improving the yield. Attached Figure Description
[0028] Figure 1 A schematic diagram of the membrane bundle positioning device for potting hollow fiber membrane modules provided in an embodiment of this application;
[0029] Figure 2 for Figure 1 Top view of the embodiment shown;
[0030] in,
[0031] 100 - Membrane fiber bundle; 200 - Covering layer; 300 - Membrane shell; 400 - Positioning component;
[0032] 310 - Locating hole; 410 - Ring-shaped body; 411 - Threaded hole; 420 - Locating washer; 430 - Locating screw. Detailed Implementation
[0033] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.
[0034] See Figure 1 This is a schematic diagram of the membrane bundle positioning device for potting hollow fiber membrane modules provided in an embodiment of this application; see also Figure 2 ,for Figure 1 Top view of the embodiment shown.
[0035] Depend on Figure 1 As can be seen, in some embodiments, the membrane bundle positioning device for potting hollow fiber membrane modules provided in this application may include:
[0036] The system includes a coating layer 200 surrounding the membrane fiber bundle 100, a membrane shell 300 surrounding the coating layer 200, and a positioning component 400 for fixing the position of the coating layer 200. The membrane fiber bundle 100 can be a cylindrical structure composed of hundreds to thousands of hollow fiber membrane filaments (0.8–2.5 mm in diameter) bundled at a designed density. As the core carrier of the separation medium, it needs to maintain coaxiality with the membrane shell 300 after potting to ensure uniform fluid distribution.
[0037] In some embodiments, the covering layer 200 can be made of a flexible or semi-rigid material (such as a mixture of PP and PE) to form a cylindrical mesh sleeve. Its function is to temporarily fix the shape of the membrane bundle 100 before potting—allowing the membrane bundle 100 to undergo micro-expansion due to temperature changes during the curing process of the potting material (such as epoxy resin), while also limiting the radial diffusion of the membrane bundle 100, thus avoiding potting voids or sealing failure caused by loose membrane fibers.
[0038] In some embodiments, the inner diameter of the covering layer 200 can be slightly larger than the outer diameter of the membrane fiber bundle 100 (e.g., 1-3 mm larger), which ensures that the membrane fiber bundle 100 can be smoothly inserted and achieves a tight fit between the covering layer 200 and the membrane fiber bundle 100.
[0039] In this embodiment, the membrane shell 300 serves as the main support structure of the membrane module. The material can be aluminum alloy or stainless steel, etc. Its inner diameter needs to form a matching gap (e.g., a gap of 1 to 5 mm) with the outer diameter of the covering layer 200. This gap is the basis for the subsequent shell-side space (the flow channel between the membrane fiber bundle 100 and the membrane shell 300).
[0040] See Figure 1 Multiple positioning holes 310 are respectively provided at both ends of the membrane housing 300 along the circumferential direction. In this embodiment, the positioning hole 310 is the liquid outlet of the finished filter. The number of positioning holes 310 can be at least 4 and they are evenly distributed around the circumference. The diameter of the positioning hole 310 can be designed according to the size of the positioning component 400 (e.g., 8-12 mm). Its depth needs to penetrate the wall thickness of the membrane housing 300 so that the end of the positioning component 400 can abut against the surface of the covering layer 200.
[0041] In some embodiments, the circumferential distribution of the positioning holes 310 can be strictly symmetrical (e.g., the spacing between adjacent holes is equal) to ensure that the force applied by the positioning component 400 to the covering layer 200 in each direction is uniform, and to avoid deformation of the covering layer 200 or displacement of the membrane shell 300 due to uneven local force.
[0042] The positioning component 400 is the core component for achieving coaxial positioning of the membrane fiber bundle 100. It is detachably connected to the membrane shell 300 (e.g., through a clearance fit between the inner and outer diameters), and abuts against the surface of the covering layer 200 by passing through the end of the positioning hole 310, ultimately making the distance between any surface of the covering layer 200 and the inner wall of the membrane shell 300 equal (i.e., radially coaxial).
[0043] In some feasible embodiments, the positioning component 400 includes:
[0044] An annular body 410 is sleeved on the outer surface of the membrane shell 300 and covers the positioning hole 310. The annular body 410 has a plurality of threaded holes 411. In some embodiments, the number of threaded holes 411 may be the same as the number of positioning holes 310, that is, each threaded hole 411 corresponds to one positioning hole 310. In some embodiments, the number of positioning holes 310 may be greater than the number of threaded holes 411, that is, the threaded hole 411 can be selected to correspond to the positioning hole 310.
[0045] In some embodiments, when the threaded hole 411 and the positioning hole 310 are correspondingly set, their central axes can be coincident to ensure that the positioning screw 430 can accurately abut against the covering layer 200 in a direction perpendicular to the axis of the membrane shell 300.
[0046] The positioning screw 430, which is threaded into the threaded hole 411, can be an internal hexagonal screw with a regular hexagonal head for easy operation with a torque wrench. The positioning screw 430 abuts against the surface of the coating layer 200 radially along the membrane fiber bundle 100. To avoid localized indentation of the coating layer 200 or deformation of the membrane shell 300 due to force on one side of the screw, in some embodiments, the positioning screw 430 can be divided into at least two groups: such as Figure 2 As shown, one set of positioning screws 430 abuts against the covering layer 200 along a first direction (e.g., left-right direction), and another set abuts against the covering layer 200 along a second direction (e.g., up-down direction). The two sets of positioning screws 430 are orthogonally distributed on the radial plane of the covering layer 200. This positioning method ensures that the position of the covering layer 200 in the radial plane (XY plane) of the membrane fiber bundle 100 is adjustable with an accuracy of ±0.2mm, significantly higher than the ±1mm accuracy of traditional manual adjustment. To further improve the fine-tuning accuracy, more sets of positioning screws 430 can be used, evenly distributed in the circumferential direction of the radial plane of the membrane fiber bundle 100, thereby achieving fine-tuning in multiple directions.
[0047] To further optimize the positioning effect, the positioning assembly 400 may also include a positioning washer 420. The positioning washer 420 may be in the form of a flat washer or a nut washer, and it is disposed between the annular body 410 and the positioning screw 430. The inner diameter of the positioning washer 420 matches the screw diameter of the positioning screw 430 (for example, it may be slightly larger by 0.1 to 0.3 mm), and the outer diameter is larger than the diameter of the positioning hole 310, so as to prevent the washer from falling into the diaphragm housing 300 during the screw tightening process.
[0048] In some feasible embodiments, the coating layer 200 has a mesh structure. The uniformly distributed mesh can restrict the radial diffusion of the membrane fiber bundle 100 through the mesh fibers, and can also improve the filling degree between the membrane fiber bundle 100 and the coating layer 200, so as to avoid the radial displacement of the membrane fiber bundle 100 due to filling voids. In addition, the mesh coating layer has good flexibility and can adapt to the shape of the membrane fiber bundle 100, reducing the risk of membrane fiber breakage.
[0049] In some feasible embodiments, to further improve the compatibility between the positioning component 400 and the membrane housing 300, an elastic pad may be provided on the side of the annular body 410 near the membrane housing 300. The elastic pad can be an ultra-thin silicone pad, which can be fixedly connected to the annular body 410 by an adhesive. The design of the elastic pad can increase the friction between the annular body 410 and the outer surface of the membrane housing 300, preventing the annular body 410 from sliding due to vibration (such as the flow impact during resin injection) during the potting process. When the membrane housing 300 has a small roundness error (such as an outer diameter deviation of 0.1 to 0.2 mm), the elastic pad can compensate for the error through its own deformation, ensuring that the end of the positioning screw 430 uniformly abuts against the covering layer 200 and maintains coaxiality.
[0050] In some embodiments, the positioning pad 420 may have multiple layers. That is, depending on the different gap requirements between the covering layer 200 and the membrane shell 300, the number and thickness of the positioning pad 420 of appropriate size can be adapted accordingly. For example, when a large gap is required, the number or thickness of the positioning pad 420 can be reduced, and vice versa.
[0051] As can be seen from the above technical solution, the method of using the membrane bundle positioning device for potting hollow fiber membrane modules provided in this application is as follows:
[0052] First, a certain amount of membrane fibers are organized into a bundle of membrane fibers 100. Then, a coating layer 200 of appropriate size is selected. The principle for selecting the size of the coating layer 200 is to slightly bind the periphery of the membrane fiber bundle 100 without squeezing the membrane fibers. The inner diameter of the coating layer 200 is slightly larger than the theoretical diameter of the membrane fiber bundle 100 (or the diameter after bundling).
[0053] Then, the membrane fiber bundle 100 is inserted into the covering layer 200, the length of the membrane fiber bundle 100 is determined, the two ends of the membrane fiber bundle 100 are cut and the holes are plugged, and the difference between the outer diameter of the covering layer 200 and the inner diameter of the membrane shell 300 is determined. This difference determines the thickness of the potting ring.
[0054] The coating layer 200 with the membrane fiber bundle 100 is inserted into the membrane shell 300. The membrane shell 300 is connected to the two ends with suitable glue-filling caps. The two ends of the membrane shell 300 are provided with positioning holes 310, which can also serve as liquid outlets.
[0055] Next, the annular body 410 of the positioning component 400 is fitted onto the outside of the membrane housing 300, and the annular body 410 is aligned with the positions of the positioning holes 310 at both ends. According to the size of the gap between the covering layer 200 and the membrane housing 300, a positioning shim 420 and a positioning screw 430 of appropriate size are fitted. The positioning screw 430 passes through the positioning shim 420, screws into the annular body 410 and extends into the positioning hole 310, and finally abuts against the outside of the covering layer 200. When the positioning screw 430 is rotated, the position of the covering layer 200 inside the membrane housing 300 can be finely adjusted, so that the covering layer 200 (membrane fiber bundle 100) moves radially, thereby precisely controlling the gap between the covering layer 200 and the membrane housing 300. After the assembly is completed, the glue is poured. The liquid level of the glue is lower than the positioning hole 310 above the membrane housing 300.
[0056] The membrane bundle positioning device for potting hollow fiber membrane modules provided in this application can ensure that the membrane bundle maintains a uniform distance from the inner wall of the membrane shell along the entire circumference (achieving centering positioning). The position of the membrane bundle can be finely adjusted by turning the positioning screw to ensure concentricity between the inside and outside. At the same time, the device of this application can ensure the firmness of the membrane bundle ends during the potting operation and resin curing process, preventing displacement or tilting. It avoids damage to the membrane bundle during the positioning process, significantly improving the yield.
[0057] It is readily understood that, based on the several embodiments provided in this application, those skilled in the art can combine, split, or reorganize the embodiments of this application to obtain other embodiments, none of which exceed the protection scope of this application.
[0058] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.
Claims
1. A membrane bundle positioning device for potting hollow fiber membrane modules, characterized in that, include: A covering layer (200) is fitted around the membrane fiber bundle (100). A membrane shell (300) is fitted onto the outside of the covering layer (200) and is spaced apart from the covering layer (200); multiple positioning holes (310) are respectively provided at both ends of the membrane shell (300) along the circumferential direction. A positioning component (400) is detachably connected to the membrane shell (300). The positioning component (400) passes through the positioning hole (310) and abuts against the surface of the covering layer (200) so that the distance between any surface of the covering layer (200) and the inner wall of the membrane shell (300) is equal. The positioning component (400) includes: An annular body (410) is sleeved on the outer surface of the membrane shell (300) and covers the positioning hole (310); the annular body (410) has a plurality of threaded holes (411); each threaded hole (411) corresponds to one positioning hole (310). A positioning screw (430) is threaded into the threaded hole (411); at least two of the positioning screws (430) abut against the surface of the covering layer (200) radially along the membrane bundle (100); The positioning screws (430) include two sets, which abut against the surface of the covering layer (200) along a first direction and a second direction respectively, wherein the first direction is perpendicular to the second direction; The positioning component (400) further includes: A positioning pad (420) is disposed between the annular body (410) and the positioning screw (430); the positioning screw (430) passes through the positioning pad (420) and abuts against the surface of the covering layer (200).
2. The membrane bundle positioning device for potting hollow fiber membrane modules according to claim 1, characterized in that, The covering layer (200) has a mesh structure.
3. The membrane bundle positioning device for potting hollow fiber membrane modules according to claim 1, characterized in that, The annular body (410) has an elastic pad on the side near the membrane shell (300).
4. The membrane bundle positioning device for potting hollow fiber membrane modules according to claim 1, characterized in that, The positioning washer (420) is a nut or a flat washer.
5. A membrane bundle positioning device for potting hollow fiber membrane modules according to claim 1, characterized in that, The positioning screw (430) is an internal hexagon screw.
6. The membrane bundle positioning device for potting hollow fiber membrane modules according to claim 1, characterized in that, The outer diameter of the positioning pad (420) is larger than the diameter of the positioning hole (310).
7. A membrane bundle positioning device for potting hollow fiber membrane modules according to claim 1, characterized in that, At least one layer of the positioning washer (420) is provided between the annular body (410) and the positioning screw (430).