Novel wet film dialyzer shell

Abstract

The utility model provides a novel wet film dialyzer shell which can improve the overall strength of the wet film dialyzer shell and avoid the situations of liquid leakage and the like caused by shell deformation in the assembling process or the using process, the novel wet film dialyzer shell comprises a shell body, and a blood inlet and a blood outlet are formed in the two ends of the shell body respectively. A dialysate inlet is formed in the side face, close to the blood inlet, of the shell body, a dialysate outlet is formed in the position, close to the blood outlet, of the side face of the shell body, and the shell body comprises an inner-layer round pipe, an X-shaped energy absorption piece and an outer-layer round pipe which are sequentially arranged from inside to outside; the X-shaped energy absorption parts are distributed in a circular array mode based on the circle center of the inner-layer circular pipe, and solid energy absorption rings arranged at equal intervals are arranged between the outer-layer circular pipe and the inner-layer circular pipe.

Description

Technical Field

[0001] This utility model relates to the field of dialyzers, and more specifically, to a novel wet membrane dialyzer housing. Background Technology

[0002] Dialyzers are currently one of the treatment methods used for patients with acute and chronic renal failure. The dialyzers currently on the market are divided into two main categories: dry membrane dialyzers and wet membrane dialyzers. Both dry and wet membrane dialyzers consist of an outer shell, blood cap, sealant, fiber membrane, and protective cap. The difference lies in the internal filling of the wet membrane dialyzer with a wet membrane solution. This offers advantages such as easier membrane hydration, convenient pre-priming, and easier degassing. Most importantly, the hydrated membrane of a wet membrane dialyzer has better biocompatibility, resulting in a lower risk of allergies and blood clots.

[0003] While ensuring treatment effectiveness, polypropylene dialyzers are inexpensive, reducing the cost of hemodialysis and alleviating the financial burden on patients. However, the outer shell is prone to deformation due to temperature changes and curing processes during assembly and centrifugation. This can lead to misalignment of concentric circles between the outer shell and the blood cap during assembly, and brittleness of the dialysate inlet. Consequently, the assembled dialyzer may lack sufficient strength, which decreases over time, resulting in side leakage, easy breakage of the dialysate inlet, and shell deformation. Utility Model Content

[0004] The purpose of this invention is to provide a novel wet membrane dialyzer housing that can improve the overall strength of the wet membrane dialyzer housing and prevent leakage caused by housing deformation during assembly or use.

[0005] The embodiments of this utility model are implemented as follows:

[0006] A novel wet membrane dialyzer housing includes a housing body with a blood inlet and a blood outlet at its two ends, respectively. A dialysate inlet is located on the side of the housing body near the blood outlet, and a dialysate outlet is located on the side of the housing body near the blood inlet. The housing body includes an inner circular tube, an X-shaped energy absorber, and an outer circular tube arranged sequentially from the inside to the outside. The X-shaped energy absorber is arranged in a circular array based on the center of the inner circular tube, and solid energy-absorbing rings are arranged at equal intervals between the outer circular tube and the inner circular tube.

[0007] In a preferred embodiment of the present invention, the X-angle of the X-shaped energy-absorbing element is 60°.

[0008] In a preferred embodiment of this utility model, the ratio of the inner tube radius to the distance from the intersection of the X-shaped energy-absorbing element to the center of the circle is 30:32:33:33-35.

[0009] In a preferred embodiment of this utility model, the above-mentioned X-shaped energy-absorbing element is provided in 4 or 6 groups.

[0010] In a preferred embodiment of this utility model, the blood inlet and blood outlet are provided with a docking step that retracts towards the center, and the inner wall of the pipe section that connects the docking step and the outer shell body is provided with multiple horizontally arranged reinforcing ribs.

[0011] In a preferred embodiment of this utility model, the passage between the blood inlet and the blood outlet and the outer shell body is connected by a multi-stage ring, and the reinforcing rib guide post extends from the second stage ring toward the outside of the blood tube opening.

[0012] In a preferred embodiment of this utility model, the dialysate inlet and dialysate outlet are provided with rotating reinforcing ribs, which are disposed on the connecting pipe near the outer shell body.

[0013] In a preferred embodiment of this utility model, the connection between the dialysate inlet and dialysate outlet and the outer shell body adopts an R5 rounded corner transition.

[0014] The beneficial effects of this utility model embodiment are:

[0015] The wet membrane dialyzer shell of this utility model is improved by designing the shell body as a sandwich structure with an X-shaped energy absorber. At the same time, one or more solid energy absorber rings are set on the outer tube wall of the outer circular tube. The X-shaped energy absorber is designed by drawing on the periodic stage tube structure and internal microstructure characteristics of bamboo. This improves the impact resistance and specific stiffness of the thin-walled shell of the wet membrane dialyzer, thereby avoiding deformation of the dialyzer shell during use. Attached Figure Description

[0016] 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 on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the outer shell structure of the novel wet membrane dialyzer according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the front structure of the outer shell of the novel wet membrane dialyzer according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the outer shell body according to an embodiment of the present utility model;

[0020] Figure 4This is an enlarged structural schematic diagram of the dialysis fluid inlet portion according to an embodiment of the present invention.

[0021] Icons: Outer shell 110; Inner round tube 111; X-shaped energy absorber 112; Outer round tube 113; Solid energy absorber ring 114; Blood inlet 120; Connecting step 121; Reinforcing guide post 122; Multi-stage ring connection 123; Blood outlet 130; Dialysis fluid inlet 140; Rotary reinforcing rib 141; R5 rounded corner 142; Dialysis fluid outlet 150. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] 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 does not need to be further defined and explained in subsequent figures.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] First Embodiment

[0029] Please see Figure 1-4 This embodiment provides a novel wet membrane dialyzer housing, including a housing body 110, with a blood inlet 120 and a blood outlet 130 at its two ends, respectively. A dialysate inlet 140 is located on the side of the housing body 110 near the blood outlet 130, and a dialysate outlet 150 is located on the side of the housing body 110 near the blood inlet 120. The blood and dialysate flow in opposite directions. This flow direction helps improve solute removal efficiency because the concentration gradient between the blood and dialysate remains large during counter-current flow, thereby promoting diffusion and allowing the solute to better diffuse from the blood side through the dialysis membrane to the dialysate side.

[0030] Because existing wet membrane dialyzer shells are generally made of special modified plastics, which are colorless, odorless, and non-toxic, they are thin-walled tubing and cannot provide sufficient strength, making them prone to deformation and rendering the wet membrane dialyzer shell unusable. Therefore, this embodiment provides an optimized shell body 110, which has better strength and prevents deformation of the wet membrane dialyzer.

[0031] In this embodiment, drawing on the superior lightweight, bending resistance, fracture toughness, and impact resistance of bamboo, the structure of the outer shell 110 is redesigned. Please refer to [link to relevant documentation]. Figure 3 The outer shell 110 includes an inner circular tube 111, an X-shaped energy-absorbing element 112, and an outer circular tube 113 arranged sequentially from the inside to the outside. The outer shell 110 is designed as a hollow sandwich structure to increase strength while reducing the weight of the outer shell 110.

[0032] Solid energy-absorbing rings 114 are arranged at equal intervals between the outer circular tube 113 and the inner circular tube 111. The solid energy-absorbing rings 114 can be completely contained within the outer circular tube, or they can be designed to protrude slightly outward from the outer circular tube. Using the solid energy-absorbing rings 114 as nodes effectively reduces stress concentration and avoids the problem of inward collapse of the hollow sandwich structure.

[0033] To further enhance the energy absorption effect of the outer shell 110, an X-shaped energy absorber 112 is provided between the outer circular tube 113 and the inner circular tube 111. The X-shaped energy absorbers 112 are arranged in a circular array based on the center of the inner circular tube 111, and the X-angle of the X-shaped energy absorbers 112 is 60°, so that the cross-section of the X-shaped energy absorbers 112 has two diagonally arranged in an equilateral triangular support structure, which improves the torsional resistance, bending resistance, fracture toughness and impact resistance of the outer shell 110.

[0034] To save on the overall cost of the outer shell 110 while ensuring its excellent impact resistance and other properties, the X-shaped energy-absorbing element 112 in this embodiment is preferably set to 4 or 6 groups.

[0035] More specifically, the radius of the inner circular tube 111 of the outer shell body 110: the distance from the intersection of the X-shaped energy-absorbing element 112 to the center of the circle: the radius of the outer circular tube 113: the radius of the solid energy-absorbing ring 114 = 30:32:33:33-35, in mm.

[0036] Meanwhile, to address the issue that temperature changes and the curing process during centrifugation can easily cause deformation of the outer shell, leading to inconsistent concentric circles when assembling the outer shell and blood cap, brittle dialysate inlet, insufficient strength after assembly, and leakage, this embodiment further improves the blood inlet and outlet, as well as the dialysate inlet and outlet.

[0037] For details, please see Figure 1 and 2 The blood inlet 120 and blood outlet 130 are provided with a retractable docking step 121 on the outside, which facilitates the connection of the blood cap. The inner wall of the tube segment connecting the docking step 121 and the outer shell 110 is provided with multiple horizontally arranged reinforcing rib guide posts 122. The reinforcing rib guide posts 122 are arranged in a circular array of 4. The cross-section of the reinforcing rib guide posts 122 is arc-shaped, which improves the concentricity of the dialyzer shell after assembly and increases the impact resistance of the blood port, ensuring that the blood cap will not be poorly sealed during the dialysis treatment process.

[0038] The passage between the blood inlet 120 and the blood outlet 130 and the outer shell 110 is connected by a multi-stage ring 123. The flow velocity at the port is less than the flow velocity inside the outer shell 110, thereby weakening the impact strength at the blood port. The reinforcing rib guide post 122 extends from the second stage ring towards the outside of the blood port.

[0039] The dialysate inlet 140 and dialysate outlet 150 are equipped with rotating reinforcing ribs 141. These ribs are located near the dialysate inlet close to the outer casing 110 and protrude outwards; that is, the diameter of the rotating reinforcing rib 141 is larger than the diameter of either the dialysate inlet 140 or the dialysate outlet 150. Furthermore, the rotating reinforcing rib 141 is not a single, continuous circular rib, but rather a ring-shaped reinforcing rib composed of multiple arc-shaped ribs with fracture notches, designed to enhance the connection with the tubing and prevent tubing connection failure.

[0040] The connection between the dialysate inlet 140 and the dialysate outlet 150 and the outer shell body 110 is transitioned with a radius of 142 (R5). The vertical reinforcing rib of the dialysate inlet 140 also extends to the outer shell body 110 with a radius transition. A radius transition of 5mm (R) is added to the dialysate outlet to form an inverted triangular support with the outer shell body 110, further preventing the dialysate outlet from breaking.

[0041] In summary, the outer shell of the wet membrane dialyzer in this utility model is improved by designing the outer shell body 110 as a sandwich structure with an X-shaped energy absorber 112. At the same time, one or more solid energy absorber rings 114 are provided on the outer wall of the outer tube 113. The X-shaped energy absorber 112 is designed by drawing on the periodic stage tube structure and internal microstructure characteristics of bamboo, thereby improving the impact resistance and specific stiffness of the thin-walled outer shell of the wet membrane dialyzer.

[0042] Meanwhile, the stability of the dialysate inlet 140 and dialysate outlet 150 is further enhanced by the rotational reinforcing rib 141 and R5 rounded corner support; the stability of the blood inlet 120 and blood outlet 130 is increased by the reinforcing rib guide post 122 and multi-stage circular ring connection 123.

[0043] Second Embodiment

[0044] This embodiment provides a dispensing process for a wet membrane dialyzer housing, applied to the novel wet membrane dialyzer housing in the first embodiment, which includes the following steps:

[0045] Step 1: Press the wet membrane dialyzer filling cap and the wet membrane dialyzer shell concentrically into place and fix them in place;

[0046] Step 2: Apply polyurethane adhesive to the wet membrane dialyzer's filling cap and outer shell using a dispensing method to achieve curing during the centrifugation process.

[0047] The above-mentioned technical solution provides a novel wet membrane dialyzer shell and its dispensing process. Compared with the existing technology, by dispensing the new structure dialyzer shell with the glue filling cap, the dialyzer shell and polyurethane adhesive are bonded together. This effectively controls the deformation caused by the adhesive curing process. It avoids side leakage caused by insufficient bonding strength due to uneven concentric circles after the blood cap and shell are fused together. It also avoids the dialysate port breaking due to slight external impacts. The wet membrane dialyzer has the advantages of high pressure resistance after welding, cannot be opened without external force, has good sealing reliability, and has an aesthetically pleasing appearance.

[0048] This specification describes examples of embodiments of the present invention, but does not imply that these embodiments illustrate and describe all possible forms of the present invention. It should be understood that the embodiments in the specification can be implemented in various alternative forms. The drawings are not necessarily drawn to scale; some features may be enlarged or reduced to show details of specific components. The specific structural and functional details disclosed should not be construed as limiting, but merely as a representative basis for teaching those skilled in the art to implement the present invention in various forms. Those skilled in the art will understand that multiple features illustrated and described with reference to any of the drawings can be combined with features illustrated in one or more other drawings to form embodiments not explicitly illustrated or described. The illustrated combinations of features provide representative embodiments for typical applications. However, various combinations and variations of features consistent with the teachings of the present invention may be used as needed for specific applications or implementations.

[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel wet membrane dialyzer housing, comprising a housing body, wherein the two ends of the housing body are a blood inlet and a blood outlet, respectively; a dialysate inlet is disposed on the side of the housing body near the blood outlet, and a dialysate outlet is disposed on the side of the housing body near the blood inlet, characterized in that, The outer shell body includes an inner circular tube, an X-shaped energy-absorbing element, and an outer circular tube arranged sequentially from the inside to the outside; wherein, the X-shaped energy-absorbing element is distributed in a circular array based on the center of the inner circular tube, and solid energy-absorbing rings are arranged at equal intervals between the outer circular tube and the inner circular tube.

2. The novel wet membrane dialyzer housing according to claim 1, characterized in that, The X-angle of the X-shaped energy absorber is 60°.

3. The novel wet membrane dialyzer housing according to claim 1, characterized in that, The inner tube radius: distance from the intersection of the X-shaped energy-absorbing element to the center: outer tube radius: solid energy-absorbing ring radius = 30:32:33:33-35.

4. The novel wet membrane dialyzer housing according to claim 1, characterized in that, The X-shaped energy-absorbing element is provided in 4 or 6 sets.

5. The novel wet membrane dialyzer housing according to any one of claims 1-4, characterized in that, The blood inlet and the blood outlet are provided with a docking step that retracts towards the center. The inner wall of the pipe section that connects the docking step and the outer shell body is provided with multiple horizontally arranged reinforcing ribs.

6. The novel wet membrane dialyzer housing according to claim 5, characterized in that, The blood inlet and the blood outlet are connected to the outer shell body through a multi-stage ring, and the reinforcing rib guide post extends from the second stage ring toward the outside of the blood tube opening.

7. The novel wet membrane dialyzer housing according to any one of claims 1-4, characterized in that, The dialysate inlet and the dialysate outlet are provided with rotating reinforcing ribs, which are located on the connecting pipe near the outer shell body, and the diameter of the rotating reinforcing ribs is larger than the diameter of the dialysate inlet or the dialysate outlet.

8. The novel wet membrane dialyzer housing according to any one of claims 1-4, characterized in that, The connection between the dialysate inlet and the dialysate outlet and the outer shell body is rounded with an R5 radius.

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