Hollow fiber membrane filter element unit

Abstract

The utility model discloses a hollow fiber membrane filter element unit, which relates to the technical field of hollow fiber membranes and comprises a pair of end mounting components and a plurality of hollow fiber membrane tubes. Wherein the end mounting assembly comprises a connecting shell, a connecting end and a locking sleeve, a fixing notch is formed in one end of the connecting shell, the connecting end is arranged in the fixing notch and connected with the fixing notch in an inserted mode, a plurality of connecting notches penetrating through the connecting end are formed in the connecting end, connecting structures are arranged in the connecting notches, and the connecting structures are connected with the connecting notches in an inserted mode. The two ends of a plurality of hollow fiber membrane tubes penetrate through the connecting shells in the pair of end mounting assemblies respectively and are fixedly connected with the connecting structures, the hollow fiber membrane tubes are in sliding connection with the connecting shells, one end of a locking sleeve is arranged in a fixing notch, and the locking sleeve abuts against the connecting ends and the connecting structures; the problems that an existing hollow fiber membrane filter element unit for hemodialysis is low in assembly efficiency, has safety risks and is inconvenient to maintain are solved.

Description

Technical Field

[0001] This utility model relates to the field of hollow fiber membrane technology, and specifically to a hollow fiber membrane filter element unit. Background Technology

[0002] Hollow fiber membrane filter units are the core separation components of hemodialysis equipment. Through the fine filtration of the hollow fiber membrane tube, they remove metabolic toxins such as urea and creatinine from the blood while retaining beneficial components such as proteins and red blood cells. This directly affects the safety and effectiveness of hemodialysis treatment. In hemodialysis settings, filter units must meet core requirements such as high biocompatibility, strict aseptic properties, stable filtration accuracy, and convenient assembly and maintenance. Assembly performance not only affects production efficiency but is also closely related to safety and operability in clinical applications.

[0003] In existing technologies, the connection between hollow fiber membrane tubes and end-mount components often employs adhesive bonding, thermoforming welding, or multiple bolt fastening methods. Adhesive bonding requires steps such as applying adhesive and waiting for curing, which is not only time-consuming but also carries the risk of adhesive residue affecting blood compatibility. Furthermore, the curing process can easily generate microbubbles, creating blood stasis dead zones and increasing the risk of thrombosis. Thermoforming welding requires extremely precise temperature control; improper operation can easily lead to membrane tube melting and deformation, damaging the filtration channel. Moreover, the welded membrane tube cannot be separated from the end-mount component, requiring the entire tube to be scrapped for subsequent repairs or replacements, significantly increasing medical costs. Multiple bolt fastening methods require tightening each bolt individually in a sterile environment, a cumbersome procedure with low assembly efficiency. Loose bolts can also cause serious safety hazards such as blood leakage. In addition, hemodialysis equipment requires regular disinfection, maintenance, and filter replacement. Existing assembly structures are difficult to disassemble, preventing rapid separation of the membrane tube from the end-mount component, increasing the complexity of clinical operations, and the disassembly process can easily damage the membrane tube, leading to secondary contamination risks.

[0004] The inconvenience of assembling and maintaining existing hollow fiber membrane filter units has become a key bottleneck restricting the safety, economy, and efficiency of their clinical application, given the specific needs of hemodialysis. Therefore, there is an urgent need to develop a filter unit structure that is simple in structure, easy to assemble, flexible in disassembly, and reliable in connection, suitable for hemodialysis scenarios. Utility Model Content

[0005] Based on this, and in response to the above problems, this utility model proposes a hollow fiber membrane filter element unit, which solves the problems of low assembly efficiency, safety risks, and inconvenient maintenance of current hollow fiber membrane filter element units for hemodialysis.

[0006] The technical solution of this utility model is:

[0007] A hollow fiber membrane filter element unit includes a pair of end mounting assemblies and a plurality of hollow fiber membrane tubes, wherein the plurality of hollow fiber membrane tubes are disposed between the pair of end mounting assemblies and both ends are detachably connected to the pair of end mounting assemblies respectively.

[0008] The end-mounting assembly includes a connecting shell, a connecting end, and a locking sleeve. One end of the connecting shell has a fixing slot, and the connecting shell is suitable for detachably fixing inside the outer shell of the dialyzer. The end of the connecting shell with the fixing slot faces outward from the outer shell. The connecting end is set inside the fixing slot and is inserted into the fixing slot. The connecting end has several connecting slots that penetrate the connecting end. Each of the several connecting slots has a connecting structure, and the connecting structure is inserted into the connecting slot. Both ends of several hollow fiber membrane tubes pass through the connecting shell of a pair of end-mounting assemblies and are fixedly connected to the connecting structure. The hollow fiber membrane tubes are slidably connected to the connecting shell. One end of the locking sleeve is set inside the fixing slot and is threadedly connected to the fixing slot. The end of the locking sleeve located inside the fixing slot abuts against the connecting end and the connecting structure. The locking sleeve has a communication port that cooperates with the several hollow fiber membrane tubes.

[0009] Preferably, the connection structure includes a connecting pipe head and a plug pipe head. The connecting pipe head is sleeved on one end of the hollow fiber membrane tube and is fixedly connected to the hollow fiber membrane tube. The plug pipe head is sleeved on the outside of the connecting pipe head and is threadedly connected to the connecting pipe head. The plug pipe head is slidably connected to the hollow fiber membrane tube. The plug pipe head is inserted into the connection groove and is detachably connected to the connection groove.

[0010] Preferably, the hollow fiber membrane tube has a tube head mounting part at each end that is configured to cooperate with the connecting tube head. The connecting tube head is sleeved on the outside of the tube head mounting part and is fixedly connected to the tube head mounting part. The outer wall of the connecting tube head is flush with the outer wall of the hollow fiber membrane tube. One end of the insertion tube head is threadedly connected to the connecting tube head, and the other end extends to the outside of one end of the hollow fiber membrane tube and is slidably connected to the hollow fiber membrane tube.

[0011] Preferably, the fixing slot includes a lower slot and an upper slot, the lower slot is connected to the upper slot, the upper slot is located above the lower slot, the connecting end is set in the lower slot and inserted into the lower slot, one end of the locking sleeve is set in the upper slot and threadedly connected to the upper slot, and the locking sleeve is used to fix the connecting end in the lower slot.

[0012] Preferably, a first sealing ring is provided in the lower groove, the first sealing ring is sleeved on the lower end of the connecting end, one side of the first sealing ring contacts the inner wall of the lower groove, and the other side contacts the outer wall of the connecting end.

[0013] Preferably, a second sealing ring is provided inside the connecting groove, the second sealing ring is sleeved on the outside of the plug connector, one side of the second sealing ring contacts the inner wall of the connecting groove, and the other side contacts the outer wall of the plug connector.

[0014] Preferably, one end of the locking sleeve in one end mounting assembly is provided with a liquid inlet distribution chamber communicating with the connecting port, and one end of the locking sleeve in the other end mounting assembly is provided with a liquid outlet collection chamber communicating with the connecting port.

[0015] Preferably, the locking sleeve is provided with a pair of third sealing rings, which are respectively embedded and installed at both ends of the locking sleeve, with the third sealing ring at one end of the locking sleeve contacting the connecting end.

[0016] Preferably, the locking sleeve has a rotating groove in the middle, and several protruding ribs are fixedly provided in the rotating groove.

[0017] Preferably, one hollow fiber membrane tube is located in the middle, and the other hollow fiber membrane tubes are arranged around the hollow fiber membrane tube located in the middle.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. It enables rapid and non-destructive disassembly and assembly of hollow fiber membrane tubes, greatly simplifying the maintenance process. Damaged single membrane tubes can be replaced individually, significantly reducing usage costs.

[0020] 2. The mechanical connection method of plug-in pre-positioning and threaded locking completely avoids the risks of biocompatibility of adhesives and the risk of damage to the membrane tube by the hot melt process, ensuring a reliable and safe connection.

[0021] 3. Multi-level sealing structure: The first sealing ring, the second sealing ring, and the third sealing ring ensure the sealing reliability of the blood flow path under high pressure, fully meeting the stringent requirements for medical applications.

[0022] 4. The design of the inlet distribution chamber and the outlet collection chamber optimizes blood flow distribution, improves dialysis efficiency, and reduces dead space. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a schematic diagram of the structure of a hollow fiber membrane filter element unit connected to an outer shell, as described in an embodiment of this utility model.

[0025] Figure 2 This is a schematic cross-sectional view of the connection between a hollow fiber membrane filter element unit and an outer shell, as described in an embodiment of this utility model.

[0026] Figure 3 This is a partial exploded structural diagram of a hollow fiber membrane filter element unit as described in an embodiment of this utility model;

[0027] Figure 4 This is a partial structural schematic diagram of a hollow fiber membrane filter element unit as described in an embodiment of this utility model;

[0028] Figure 5 This is a partial cross-sectional structural diagram of a hollow fiber membrane filter element unit as described in an embodiment of this utility model;

[0029] Explanation of reference numerals in the attached figures:

[0030] 10-Outer shell, 11-End mounting assembly, 12-Hollow fiber membrane tube, 13-Connecting shell, 14-Connecting end, 15-Locking sleeve, 16-Fixing groove, 17-Connecting groove, 18-Connecting structure, 19-Connecting port, 20-Connecting tube head, 21-Insertion tube head, 22-Tube head mounting part, 23-Lower groove, 24-Upper groove, 25-First sealing ring, 26-Second sealing ring, 27-Liquid inlet distribution chamber, 28-Liquid outlet collection chamber, 29-Third sealing ring, 30-Rotating groove, 31-Raised rib. Detailed Implementation

[0031] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0032] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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 the embodiments of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a communication 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 embodiment of the invention according to the specific circumstances.

[0035] In this embodiment of the 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 being 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 being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0037] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0038] Example:

[0039] like Figures 1 to 5 As shown, this embodiment discloses a hollow fiber membrane filter element unit, including a pair of end mounting assemblies 11 and a plurality of hollow fiber membrane tubes 12. The plurality of hollow fiber membrane tubes 12 are disposed between the pair of end mounting assemblies 11, and both ends are detachably connected to the pair of end mounting assemblies 11 respectively.

[0040] The end-mounting assembly 11 includes a connecting housing 13, a connecting end 14, and a locking sleeve 15. One end of the connecting housing 13 has a fixing slot 16, and the connecting housing 13 is adapted to be detachably fixed within the outer housing 10 of the dialyzer. The end of the connecting housing 13 with the fixing slot 16 faces outwards from the outer housing 10. The connecting end 14 is disposed within the fixing slot 16 and is inserted into the fixing slot 16. The connecting end 14 has several connecting slots 17 penetrating through it, and each of the connecting slots 17 contains a connecting structure 18. The connecting structure 18 is inserted into the connecting slot 17. Both ends of several hollow fiber membrane tubes 12 pass through the connecting shell 13 in a pair of end mounting assemblies 11 and are fixedly connected to the connecting structure 18. The hollow fiber membrane tubes 12 are slidably connected to the connecting shell 13. One end of the locking sleeve 15 is set in the fixing slot 16 and is threadedly connected to the fixing slot 16. The end of the locking sleeve 15 located in the fixing slot 16 abuts against the connecting end 14 and the connecting structure 18. The locking sleeve 15 is provided with a communication port 19 that cooperates with several hollow fiber membrane tubes 12.

[0041] The connecting shell 13 is detachably connected to the inner wall of the dialyzer outer shell 10, facilitating the assembly and disassembly of the entire hollow fiber membrane filter unit and the dialyzer outer shell 10. For example, a threaded connection can be used. The fixing slot 16 provides insertion and positioning space for the connecting end 14. The connecting slot 17 of the connecting end 14, in conjunction with the connecting structure 18, enables the pre-installation of the hollow fiber membrane tube 12. The locking sleeve 15, through a threaded connection with the fixing slot 16, has its end pressed against the connecting end 14 and the connecting structure 18 to complete the fixation. The connecting port 19 ensures smooth blood flow. The threaded connection design enables quick assembly and disassembly of the filter unit and dialyzer. The combination of insertion and threaded locking allows assembly to be completed by sequentially inserting and tightening, while disassembly only requires loosening the locking sleeve 15. This simple and efficient operation, combined with the tightness and clamping effect of the threaded connection, ensures the stability of the connections between components, effectively avoiding the risk of blood leakage. This solves the problems of low assembly efficiency, safety risks, and inconvenient maintenance of current hollow fiber membrane filter units for hemodialysis.

[0042] To facilitate the assembly and disassembly of the connecting structure 18 and the hollow fiber membrane tube 12, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the connecting structure 18 includes a connecting tube head 20 and a plug tube head 21. The connecting tube head 20 is sleeved on one end of the hollow fiber membrane tube 12 and is fixedly connected to the hollow fiber membrane tube 12. The plug tube head 21 is sleeved on the outside of the connecting tube head 20 and is threadedly connected to the connecting tube head 20. The plug tube head 21 is slidably connected to the hollow fiber membrane tube 12. The plug tube head 21 is inserted into the connecting groove 17 and is detachably connected to the connecting groove 17.

[0043] The connecting tube head 20 is fixedly sleeved on the end of the hollow fiber membrane tube 12, providing a connection base for the hollow fiber membrane tube 12. The fixing method can be existing fixing connection methods such as adhesive bonding or heat fusion. The insert tube head 21 is threaded onto the outside of the connecting tube head 20 and engages with the connecting groove 17, realizing a detachable connection between the hollow fiber membrane tube 12 and the end mounting assembly 11. The sliding connection between the insert tube head 21 and the hollow fiber membrane tube 12 adapts to installation and adjustment requirements. The threaded connection of the connecting tube head 20 and the insert tube head 21 strengthens the connection between the hollow fiber membrane tube 12 and the connecting structure 18. The detachable design facilitates later maintenance or replacement of the hollow fiber membrane tube 12, avoiding the scrapping of the entire filter element due to damage to a single hollow fiber membrane tube 12, reducing usage costs. Simultaneously, the sliding engagement reduces mechanical damage to the hollow fiber membrane tube 12 during installation, improving assembly safety.

[0044] The hollow fiber membrane tube 12 has a tube head mounting part 22 at each end, which is configured to cooperate with the connecting tube head 20. The connecting tube head 20 is sleeved on the outside of the tube head mounting part 22 and is fixedly connected to the tube head mounting part 22. The outer wall of the connecting tube head 20 is flush with the outer wall of the hollow fiber membrane tube 12. One end of the insertion tube head 21 is threadedly connected to the connecting tube head 20, and the other end extends to the outside of one end of the hollow fiber membrane tube 12 and is slidably connected to the hollow fiber membrane tube 12.

[0045] The tube head mounting portions 22 at both ends of the hollow fiber membrane tube 12 provide precise installation positioning for the connecting tube head 20. After the connecting tube head 20 is fitted, it is flush with the outer wall of the hollow fiber membrane tube 12. One end of the insertion tube head 21 is threaded and fastened to the connecting tube head 20, and the other end extends to the outside of the hollow fiber membrane tube 12 and maintains a sliding connection, forming a stepped connection structure. The tube head mounting portions 22 ensure the flatness and coaxiality of the connecting tube head 20 during installation, avoiding damage caused by uneven stress on the end of the hollow fiber membrane tube 12. The design of the connecting tube head 20 being flush with the outer wall of the hollow fiber membrane tube 12 reduces fluid resistance and prevents blood from stagnating at the connection. The extension structure of the insertion tube head 21 further enhances the connection stability and improves the reliability of the connection between the hollow fiber membrane tube 12 and the connection structure 18.

[0046] To facilitate the installation of the connecting end 14 and the locking sleeve 15, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the fixing slot 16 includes a lower slot 23 and an upper slot 24. The lower slot 23 is connected to the upper slot 24, and the upper slot 24 is located above the lower slot 23. The connecting end 14 is set in the lower slot 23 and inserted into the lower slot 23. One end of the locking sleeve 15 is set in the upper slot 24 and threadedly connected to the upper slot 24. The locking sleeve 15 is used to fix the connecting end 14 in the lower slot 23.

[0047] The fixed slot 16 is divided into a lower slot 23 and an upper slot 24 that are interconnected. The lower slot 23 is adapted for the insertion and positioning of the connecting end 14, while the upper slot 24 provides threaded connection space for the locking sleeve 15. The layered design separates the positioning of the connecting end 14 from the fixing function of the locking sleeve 15. The layered structure makes the installation path of each component clear, improves the orderliness of assembly, and avoids mutual interference between components during installation. The limiting effect of the lower slot 23 on the connecting end 14 ensures the installation accuracy, while the threaded fit of the upper slot 24 ensures the fastening effect of the locking sleeve 15. The two work together to improve the assembly stability of the overall structure and prevent component displacement during use.

[0048] As a further preferred embodiment, a first sealing ring 25 is provided inside the lower groove 23. The first sealing ring 25 is sleeved on the lower end of the connecting end 14, with one side of the first sealing ring 25 contacting the inner wall of the lower groove 23 and the other side contacting the outer wall of the connecting end 14. The provision of the first sealing ring 25 can effectively improve the sealing performance between the connecting end 14 and the lower groove 23.

[0049] As a further preferred embodiment, a second sealing ring 26 is provided within the connecting groove 17. The second sealing ring 26 is sleeved on the outside of the connector 21, with one side of the second sealing ring 26 contacting the inner wall of the connecting groove 17 and the other side contacting the outer wall of the connector 21. The provision of the second sealing ring 26 can effectively improve the sealing performance between the connector 21 and the connecting groove 17.

[0050] To optimize the blood flow path, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that one end of the locking sleeve 15 in one end mounting assembly 11 is provided with a liquid inlet distribution chamber 27 communicating with the connecting port 19, and the other end mounting assembly 11 is provided with a liquid outlet collection chamber 28 communicating with the connecting port 19.

[0051] The locking sleeves 15 of the two end mounting components 11 are respectively provided with an inlet distribution chamber 27 and an outlet collection chamber 28, both of which are connected to the connecting port 19. The inlet distribution chamber 27 evenly distributes the input blood to each hollow fiber membrane tube 12, and the outlet collection chamber 28 collects and discharges the blood processed by each membrane tube. The design of the inlet distribution chamber 27 and the outlet collection chamber 28 optimizes the blood flow path, ensuring that each hollow fiber membrane tube 12 can fully contact the blood, avoiding excessive local membrane tube load or blood stagnation, and improving dialysis efficiency and effect. At the same time, the centralized inlet and outlet structure simplifies the tubing connection with the dialyzer, reduces the number of tubing interfaces, and further reduces the risk of leakage.

[0052] As a further preferred embodiment, the locking sleeve 15 is provided with a pair of third sealing rings 29, which are respectively embedded and installed at both ends of the locking sleeve 15, with the third sealing ring 29 at one end of the locking sleeve 15 contacting the connecting end 14. The provision of the third sealing rings 29 can improve the sealing performance between the liquid inlet distribution chamber 27 and the liquid outlet collection chamber 28.

[0053] To facilitate the installation and removal of the locking sleeve 15, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the locking sleeve 15 is provided with a rotating groove 30 in the middle, and a number of protruding ribs 31 are fixedly provided in the rotating groove 30.

[0054] The rotating groove 30 in the middle of the locking sleeve 15 provides space for the hand or tool to apply force, and the raised rib 31 in the rotating groove 30 increases the friction of the force application surface to prevent slippage during rotation. This design can still provide sufficient rotational torque even when wearing gloves or in a sterile operating environment to ensure that the locking sleeve can be reliably tightened, avoiding improper installation or operational contamination caused by slippage.

[0055] To avoid the hollow fiber membrane tubes 12 from tangling with each other, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that one hollow fiber membrane tube 12 is located in the middle, and the other hollow fiber membrane tubes 12 are arranged around the hollow fiber membrane tube 12 located in the middle.

[0056] In one embodiment, the number of hollow fiber membrane tubes 12 is seven.

[0057] Seven hollow fiber membrane tubes 12 are used, with one located in the center and the other six arranged around it, forming a uniform and symmetrical layout. This arrangement facilitates space utilization and ensures a large contact area between the blood and the hollow fiber membrane tubes 12. The circular arrangement of the seven hollow fiber membrane tubes 12 increases the effective dialysis area within a limited space, resulting in more uniform blood distribution and improved dialysis efficiency. The central and circular layout also prevents the hollow fiber membrane tubes 12 from tangling with each other.

[0058] Working principle of this utility model:

[0059] This invention achieves rapid assembly and disassembly of the hollow fiber membrane filter unit and the outer shell 10 of the dialyzer through a detachable connection between the connecting shell 13 and the outer shell 10 of the dialyzer. Simultaneously, the insertion and engagement of the connecting end 14 with the fixing slot 16, and the insertion and engagement of the connecting structure 18 with the connecting slot 17, allow the two ends of the hollow fiber membrane tube 12 to be pre-positioned and installed via the connecting structure 18 and the connecting end 14. The locking sleeve 15 is then threadedly connected to the fixing slot 16, with its end abutting against the connecting end 14 and the connecting structure 18 to secure them. The connecting port 19 ensures unobstructed blood flow. This invention, through the combination of insertion and threaded locking, achieves a detachable connection between the hollow fiber membrane tube 12 and the end mounting assembly 11. Assembly is simple and efficient; insertion and threaded locking are performed sequentially. Disassembly allows for quick separation of components by loosening the locking sleeve 15. The threaded connection and abutment ensure the stability and sealing of the connection, effectively mitigating the risk of blood leakage.

[0060] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hollow fiber membrane filter element unit, characterized in that, It includes a pair of end mounting assemblies (11) and a plurality of hollow fiber membrane tubes (12), wherein the plurality of hollow fiber membrane tubes (12) are disposed between the pair of end mounting assemblies (11) and both ends are detachably connected to the pair of end mounting assemblies (11); The end mounting assembly (11) includes a connecting shell (13), a connecting end (14), and a locking sleeve (15). One end of the connecting shell (13) is provided with a fixing slot (16). The connecting shell (13) is adapted to be detachably fixed inside the outer shell (10) of the dialyzer. The end of the connecting shell (13) with the fixing slot (16) faces outward from the outer shell (10). The connecting end (14) is set inside the fixing slot (16) and is inserted into the fixing slot (16). The connecting end (14) is provided with several connecting slots (17) that penetrate the connecting end (14). Each of the several connecting slots (17) is provided with a connecting structure (18). The connecting structure (18) is inserted into the connecting slot (17). The two ends of several hollow fiber membrane tubes (12) pass through the connecting shell (13) in a pair of end mounting assemblies (11) and are fixedly connected to the connecting structure (18). The hollow fiber membrane tubes (12) are slidably connected to the connecting shell (13). One end of the locking sleeve (15) is set in the fixed slot (16) and is threadedly connected to the fixed slot (16). The end of the locking sleeve (15) located in the fixed slot (16) abuts against the connecting end (14) and the connecting structure (18). The locking sleeve (15) is provided with a communication port (19) that cooperates with several hollow fiber membrane tubes (12).

2. The hollow fiber membrane filter element unit according to claim 1, characterized in that, The connection structure (18) includes a connecting tube head (20) and a plug tube head (21). The connecting tube head (20) is sleeved on one end of the hollow fiber membrane tube (12) and is fixedly connected to the hollow fiber membrane tube (12). The plug tube head (21) is sleeved on the outside of the connecting tube head (20) and is threadedly connected to the connecting tube head (20). The plug tube head (21) is slidably connected to the hollow fiber membrane tube (12). The plug tube head (21) is inserted into the connecting groove (17) and is detachably connected to the connecting groove (17).

3. A hollow fiber membrane filter element unit according to claim 2, characterized in that, Hollow fiber membrane tube (12) has tube head mounting parts (22) at both ends that cooperate with connecting tube head (20). Connecting tube head (20) is sleeved on the outside of tube head mounting part (22) and fixedly connected to tube head mounting part (22). The outer wall of connecting tube head (20) is flush with the outer wall of hollow fiber membrane tube (12). Inserting tube head (21) is threaded to one end of connecting tube head (20) and extends to the outside of one end of hollow fiber membrane tube (12) and is slidably connected to hollow fiber membrane tube (12).

4. A hollow fiber membrane filter element unit according to claim 3, characterized in that, The fixed slot (16) includes a lower slot (23) and an upper slot (24). The lower slot (23) is connected to the upper slot (24). The upper slot (24) is located above the lower slot (23). The connecting end (14) is set inside the lower slot (23) and is inserted into the lower slot (23). One end of the locking sleeve (15) is set inside the upper slot (24) and is threadedly connected to the upper slot (24). The locking sleeve (15) is used to fix the connecting end (14) inside the lower slot (23).

5. A hollow fiber membrane filter element unit according to claim 4, characterized in that, A first sealing ring (25) is provided in the lower groove (23). The first sealing ring (25) is sleeved on the lower end of the connecting end (14). One side of the first sealing ring (25) contacts the inner wall of the lower groove (23), and the other side contacts the outer wall of the connecting end (14).

6. A hollow fiber membrane filter element unit according to claim 5, characterized in that, A second sealing ring (26) is provided in the connecting groove (17). The second sealing ring (26) is sleeved on the outside of the plug head (21). One side of the second sealing ring (26) contacts the inner wall of the connecting groove (17), and the other side contacts the outer wall of the plug head (21).

7. A hollow fiber membrane filter element unit according to claim 6, characterized in that, One end of the locking sleeve (15) in one end of the mounting assembly (11) is provided with a liquid inlet distribution chamber (27) communicating with the connecting port (19), and the other end of the locking sleeve (15) in the mounting assembly (11) is provided with a liquid outlet collection chamber (28) communicating with the connecting port (19).

8. A hollow fiber membrane filter element unit according to claim 7, characterized in that, The locking sleeve (15) is provided with a pair of third sealing rings (29). The pair of third sealing rings (29) are respectively embedded and installed at both ends of the locking sleeve (15). The third sealing ring (29) at one end of the locking sleeve (15) is in contact with the connecting end (14).

9. A hollow fiber membrane filter element unit according to claim 8, characterized in that, The locking sleeve (15) has a rotating groove (30) in the middle, and several protruding ribs (31) are fixedly provided in the rotating groove (30).

10. A hollow fiber membrane filter element unit according to claim 9, characterized in that, One of the hollow fiber membrane tubes (12) is located in the middle, and the other hollow fiber membrane tubes (12) are arranged around the hollow fiber membrane tube (12) located in the middle.

Images