Hollow fiber membrane module

Abstract

The utility model provides a hollow fiber membrane module which comprises a cylindrical container for accommodating a hollow fiber membrane bundle; a resin sealing part for fixing both ends of the hollow fiber membrane to the cylindrical container; and a cover provided at both ends of the cylindrical container and having a fluid inlet / outlet, in which a spiral-shaped rib is formed at a position on the outer periphery of the cylindrical container corresponding to the resin sealing part, and the cover has a structure covering the rib. According to the utility model, the hollow fiber membrane module capable of inhibiting the stripping of the resin sealing part in the cylindrical container can be provided.

Description

Technical Field

[0001] The utility model relates to a hollow fiber membrane component. Background Art

[0002] Conventionally, hollow fiber membrane modules have been used as blood purifiers and component separators in extracorporeal blood purification treatments (hemodialysis, hemodiafiltration, hemofiltration, plasma separation, etc.), treatment of body cavity fluids such as ascites, and virus removal treatments of protein-containing preparations (plasma separation preparations, biomedical products, etc.).

[0003] The hollow fiber membrane module usually comprises: a cylindrical container, which accommodates the hollow fiber membrane bundle inside, and has two ports (inlet and outlet) on the side that serve as the inlet and outlet of the fluid; and a cap (head), which is joined to both ends of the cylindrical container by threaded joint or welding using a threaded portion, and has a fluid inlet and outlet (e.g. WO2017 / 171015, JP2013-208608). In addition, the two ends of the hollow fiber membrane bundle accommodated in the cylindrical container are usually fixed to the cylindrical container by a resin sealing portion. Utility Model Content

[0004] Problems to be solved by utility models

[0005] At present, as the cylindrical container and cover of the hollow fiber membrane module, from the viewpoint of lightness and processability, parts formed by resin injection molding are used. However, when such a hollow fiber membrane module is subjected to a strong impact from the outside, there is a case where the cylindrical container is deformed and the resin sealing part inside the container is peeled off. On the other hand, if the wall constituting the container is thickened in order to prevent peeling caused by the deformation of the cylindrical container, the production cost of the module may increase due to the increase in the amount of material used and the decrease in the yield rate of injection molding.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hollow fiber membrane module capable of suppressing peeling of a resin sealing portion inside a cylindrical container.

[0007] Solutions for solving problems

[0008] In order to achieve the above-mentioned purpose, the hollow fiber membrane assembly of the utility model includes: a cylindrical container, which accommodates the hollow fiber membrane bundle; a resin sealing part, which fixes the two ends of the hollow fiber membrane to the cylindrical container; and a cover, which is arranged at the two ends of the cylindrical container and has a fluid inlet and outlet, and spiral ribs are formed at the position corresponding to the resin sealing part on the outer periphery of the cylindrical container, and the cover has a structure covering the ribs.

[0009] By adopting this structure, a spiral rib is formed at a position corresponding to the resin sealing part on the outer circumference of the cylindrical container and a cover is provided at both ends of the cylindrical container to cover the rib, thereby suppressing the peeling of the resin sealing part caused by a strong impact from the outside.

[0010] In the hollow fiber membrane module of the present invention, the thickness of the wall constituting the cylindrical container, the height of the ribs, and / or the maximum value of the width of the ribs can be set within the range of 0.5 mm to 4.0 mm.

[0011] By setting the thickness of the wall constituting the cylindrical container, the height of the ribs, and / or the maximum value of the width of the ribs within a specific range (0.5 mm to 4.0 mm), it is possible to more effectively suppress peeling of the resin sealing portion.

[0012] Effect of utility model

[0013] According to the present invention, it is possible to provide a hollow fiber membrane module capable of suppressing peeling of a resin sealing portion inside a cylindrical container. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a cross-sectional view for explaining the overall structure of a hollow fiber membrane module according to an embodiment of the present invention.

[0015] Figure 2 This is a perspective view of a cover of a hollow fiber membrane module according to an embodiment of the present invention (a view viewed from the fluid inlet and outlet side).

[0016] Figure 3 This is a perspective view of a cover of a hollow fiber membrane module according to an embodiment of the present invention (a view viewed from the flange side).

[0017] Figure 4 This is a perspective view of a cover of a hollow fiber membrane module according to an embodiment of the present invention (a view viewed from the flange side).

[0018] Figure 5 This is a side view of the hollow fiber membrane module according to the embodiment of the present invention (a view showing an example of ribs).

[0019] Figure 6 This is a side view of the hollow fiber membrane module according to the embodiment of the present invention (a view showing another example of the rib).

[0020] Figure 7 This is an enlarged cross-sectional view of an example of the rib of the hollow fiber membrane module according to the embodiment of the present invention.

[0021] Figure 8 This is an enlarged cross-sectional view of another example of the rib of the hollow fiber membrane module according to the embodiment of the present invention.

[0022] Description of Reference Numerals

[0023] 1. Hollow fiber membrane assembly; 2. Cylindrical container; 2b. Wall constituting the cylindrical container; 3. Hollow fiber membrane; 4. Resin sealing portion; 5. Cover; 5a. Fluid inlet and outlet; 6. Ribs; 7. Flange (structure covering the ribs); H. Height of the ribs; T. Thickness of the wall constituting the cylindrical container; W. Maximum value of the width of the ribs. DETAILED DESCRIPTION

[0024] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the same reference numerals are used to mark the same elements and repeated descriptions are omitted. In addition, unless otherwise specified, the positional relationships such as up, down, left, and right are based on the positional relationships shown in the accompanying drawings. Furthermore, the dimensional ratios of the accompanying drawings are not limited to the ratios shown in the drawings. In addition, the following embodiments are examples for illustrating the present invention, and the present invention is not limited to the embodiments.

[0025] First, the structure of the hollow fiber membrane module 1 according to the embodiment of the present invention will be described. Figure 1 This is a schematic cross section of the hollow fiber membrane module 1 of this embodiment cut along a plane passing through the central axis P. The hollow fiber membrane module 1 of this embodiment includes a cylindrical container 2, hollow fiber membranes 3, a resin sealing portion 4, a cover 5, ribs 6, flanges 7, and the like.

[0026] The cylindrical container 2 is formed in a cylindrical shape, and at least one end 2a in the longitudinal direction (the direction of the central axis P of the cylinder) is open (in this embodiment, both ends are open). The hollow fiber membrane 3 is accommodated in the cylindrical container 2. The side of the cylindrical container 2 is formed with, for example, two ports 10 (in the middle) that serve as fluid inlet and outlet. Figure 1 Only one opening is shown in FIG. 1 ). The thickness T of the wall 2b constituting the cylindrical container 2 (see Figure 1 , Figure 7 , Figure 8 ) is preferably set to a value within the range of 0.5 mm to 4.0 mm (e.g., 2.4 mm, 2.5 mm, etc.).

[0027] The hollow fiber membrane 3 is, for example, a bundle of multiple hollow fiber membranes. Figure 1 As shown, the hollow fiber membranes 3 are accommodated in a cylindrical container 2 along the longitudinal direction. The hollow fiber membranes 3 function as separation membranes, and can separate components of a fluid to be separated between the inner region and the outer region of each hollow fiber membrane.

[0028] The resin sealing portion 4 is composed of a sealing resin such as Figure 1As shown in FIG. 1 , both ends 3a of the hollow fiber membrane 3 are embedded inside both ends 2a of the cylindrical container 2 and the hollow fiber membrane 3 is fixed to both ends 2a of the cylindrical container 2. The resin sealing portion 4 is formed inside the cylindrical container 2. Figure 1 As shown, the resin sealing portion 4 is formed at a position corresponding to the rib 6 formed on the outer periphery (that is, the rib 6 of the cylindrical container 2 is formed on the outer periphery of the cylindrical container 2. In this case, Figure 1 As shown in the figure, the rib 6 of the cylindrical container 2 is formed at a position corresponding to the resin sealing portion 4 formed on the inner side of the cylindrical container 2). The outer peripheral area of ​​the resin sealing portion 4 is a portion 4a composed only of the sealing resin, and the inner area thereof is a portion 4b where the sealing resin enters the gap between the hollow fiber membranes of the hollow fiber membrane 3. Examples of the sealing resin include polyurethane resin, epoxy resin, silicone resin, and the like.

[0029] The cover 5 is provided at the openings of the two end portions 2a of the cylindrical container 2, and has a fluid inlet and outlet 5a. The cover 5 as a cover member can cover the openings of the two end portions 2a of the cylindrical container 2. The cylindrical container 2 and the cover 5 are joined, for example, by vibration welding, infrared welding, etc., and are sealed so that liquid does not leak. As a material forming the cylindrical container 2 and the cover 5, for example, amorphous resins such as polycarbonate and polyphenylsulfone can be used. In addition, the cover 5 has a structure (flange) 7 that covers the rib 6. The flange 7 is configured to cover a part or all of the rib 6, but in terms of strong resistance to impact, it is preferably as shown in FIG. Figure 2 to Figure 4 The structure shown is a continuous cylindrical structure covering the entire rib 6 .

[0030] The rib 6 is formed at a position on the outer circumference of the cylindrical container 2 corresponding to the resin seal portion 4. The rib 6 is a structure protruding from the outer surface of the cylindrical container 2 and is formed of the same material as the cylindrical container 2. As long as the rib 6 is spiral, it can be either Figure 5 Then the rib 6 is continuous, or it can be like Figure 6 The rib 6 is discontinuous. As the shape of the rib 6, for example, Figure 7 and Figure 8 The wedge shape can also be in various forms. For example, it can be in the form of Figure 7 The rib 6 shown in FIG. 6 is generally triangular in cross-section, or as shown in FIG. Figure 8 The ribs 6 shown are of a generally trapezoidal shape in cross-section.

[0031] like Figure 7 and Figure 8 As shown in FIG. 1 , the height H of the rib 6 is preferably set to a value within the range of 0.5 mm to 4.0 mm (e.g., 0.8 mm, 2.5 mm, etc.). The height H of the rib 6 is set to the distance from the top of the rib 6 to the outer peripheral surface of the cylindrical container 2 (e.g., Figure 7In the case where there are multiple positions of the outer peripheral surfaces of the cylindrical container 2, the distance is from the top of the rib 6 to the outer peripheral surface farthest from the top. In addition, the maximum value W of the width of the rib 6 is also preferably set to a value within the range of 0.5 mm to 4.0 mm (for example, 1.4 mm, 2.5 mm, etc.). Figure 7 and Figure 8 In the case of the wedge-shaped rib 6 , the maximum value W of the width of the rib 6 is the value of the width on the most root side of the rib 6 .

[0032] In the hollow fiber membrane assembly 1 of the embodiment described above, since the spiral ribs 6 are formed at positions corresponding to the resin sealing portion 4 on the outer periphery of the cylindrical container 2 and the ribs 6 are covered with covers 5 provided at both end portions 2a of the cylindrical container 2, it is possible to suppress peeling of the resin sealing portion 4 caused by a strong impact from the outside.

[0033] In addition, in the hollow fiber membrane module 1 of the embodiment described above, by setting the thickness T of the wall 2b constituting the cylindrical container 2, the height H of the rib 6 and the maximum value W of the width of the rib 6 within a specific range (0.5mm~4.0mm), the peeling of the resin sealing part 4 can be more effectively suppressed.

[0034] The present invention is not limited to the above embodiments, and the methods formed by appropriately applying design changes to these embodiments by those skilled in the art are also included in the scope of the present invention as long as they have the features of the present invention. That is, the various elements and their configurations, materials, conditions, shapes, sizes, etc. possessed by the above embodiments are not limited to the exemplified methods and can be appropriately changed. In addition, the various elements possessed by the above embodiments can be combined within the technically feasible range, and the methods formed by combining these elements are also included in the scope of the present invention as long as they contain the features of the present invention.

Claims

1. A hollow fiber membrane module, characterized in that: The hollow fiber membrane module comprises: a cylindrical container for accommodating a hollow fiber membrane bundle; a resin sealing portion for fixing both ends of the hollow fiber membrane to the cylindrical container; and a cover provided at both ends of the cylindrical container and having a fluid inlet and outlet. A spiral rib is formed at a position corresponding to the resin sealing portion on the outer circumference of the cylindrical container. The cover has a configuration covering the rib.

2. The hollow fiber membrane assembly according to claim 1, characterized in that: The thickness of the wall constituting the cylindrical container is set within a range of 0.5 mm to 4.0 mm.

3. The hollow fiber membrane assembly according to claim 1, characterized in that: The height of the rib is set within a range of 0.5 mm to 4.0 mm.

4. The hollow fiber membrane assembly according to claim 1, characterized in that: The maximum value of the width of the rib is set within the range of 0.5 mm to 4.0 mm.

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