Auxiliary preparation structure of dialysate filter

Abstract

The utility model provides an auxiliary preparation structure of a dialysate filter, and relates to the technical field of dialysate filters. The hollow fiber membrane tube is arranged in the shell; the glue injection covers are arranged on the two sides of the shell and used for blocking the two ends of the shell. Wherein two liquid inlet channels are formed in the side face of the shell and communicated with the interior of the shell, a first rubber blocking plate and a second rubber blocking plate are arranged at the two ends of the inner side of the shell respectively, the first rubber blocking plate and the second rubber blocking plate extend towards the two ends of the shell from the middle section of the shell respectively, the first rubber blocking plate and the second rubber blocking plate directly face the two liquid inlet channels respectively, and gaps exist between the first rubber blocking plate and the second rubber blocking plate and the two liquid inlet channels. The distance between the top of the first rubber blocking plate and the same-side shell end face is larger than that between the top of the second rubber blocking plate and the same-side shell end face. According to the auxiliary preparation structure of the dialysate filter, the problems of high production cost and complex production process of a dialysate filter for one-way flow filtration in the prior art are solved.

Description

Technical Field

[0001] This utility model belongs to the field of dialysate filter technology, and specifically relates to an auxiliary preparation structure for dialysate filters. Background Technology

[0002] Hemodialysis is widely used in the treatment of uremia patients. It primarily utilizes the principle of a semipermeable membrane, introducing the patient's blood and dialysate simultaneously into the dialyzer. The two flow in opposite directions on the inner and outer sides of the fibrous membrane wall. Toxic macromolecules in the blood can flow through the membrane pores to the outer side of the membrane wall and out of the body with the dialyzer. Simultaneously, the solute gradient, osmotic gradient, and water pressure gradient across the membrane wall help remove toxins from the blood, replenish nutrients, and regulate the blood's pH level.

[0003] Before entering the dialyzer, the dialysate needs to be purified by a dialysate filter. Specifically, the hollow fiber membrane is used to remove endotoxins, bacteria, and insoluble particles from the dialysate, achieving the requirements of ultrapure dialysis. This provides patients with a safer dialysate during treatment, avoids some micro-inflammatory reactions caused by dialysis, improves dialysis quality, and prolongs patients' lives.

[0004] A dialysate filter typically consists of an outer shell, end caps on both sides of the shell, a hollow fiber membrane tube inside the shell, and two outlets on the side of the shell. Dialysate is injected into the hollow fiber tube from both ends of the shell, filtered through the tube, and then flows out through the outlets. However, due to differences in the models and types of dialysis machines, the filtration methods of their dialysate filters also vary. Currently, one method involves sealing one side of the dialysate filter shell with an end cap and sealing one outlet with adhesive. This allows the dialysate to flow from one end of the shell to the other outlet during filtration, extending the flow path and improving filtration efficiency. However, this setup requires separate adhesive sealing of one outlet, adding an extra process step, increasing the cost of the dialysate filter and making the manufacturing process more complex, thus affecting production efficiency. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide an auxiliary preparation structure for dialysate filters, which aims to solve the problems of high production cost and complex production process of unidirectional flow filtration dialysate filters in the prior art.

[0006] This utility model proposes an auxiliary preparation structure for a dialysate filter, comprising:

[0007] The outer shell includes a hollow fiber membrane tube disposed within it, and glue injection caps disposed on both sides of the outer shell to seal both ends of the outer shell. The outer shell has two liquid inlet channels on its sides, which communicate with the interior of the outer shell. A first glue baffle and a second glue baffle are respectively disposed at both ends of the inner side of the outer shell. Both the first and second glue baffles extend from the middle section of the outer shell towards both ends. The first and second glue baffles are directly opposite the two liquid inlet channels and have a gap between them. The distance between the top of the first glue baffle and the same-side end face of the outer shell is greater than the distance between the top of the second glue baffle and the same-side end face of the outer shell.

[0008] The aforementioned auxiliary preparation structure for a dialysate filter involves placing a hollow fiber membrane tube inside a housing, sealing both sides of the housing with glue-filling caps to limit and fix the hollow fiber membrane tube, and installing it on a centrifugal glue-filling device. The centrifugal glue-filling device dispenses glue into the housing through the inlet channel, causing the housing to rotate. This causes the glue flowing into the housing from the two inlet channels to move towards the glue-filling caps under centrifugal force. Furthermore, the first and second glue-filling plates prevent the glue from dripping directly onto the hollow fiber membrane tube; instead, they guide the glue towards the two end faces of the housing, thus avoiding direct contact between the glue and the hollow fiber membrane tube upon entering the housing and causing damage. Furthermore, by setting the tops of the first and second baffles at different distances from the end face of the outer casing on the same side, the thickness of the adhesive buildup on both sides is consistent when the amount of adhesive injected is the same. When one side of the second baffle is just covered with adhesive, the opposite side of the first baffle is not yet covered. At this point, adhesive injection is stopped, and after the adhesive cools, only the seal between one inlet channel and the inside of the outer casing remains. The adhesive cap is removed, and excess adhesive at both ends of the outer casing is cut off, thus completing the original adhesive injection and sealing process and ensuring the seal between one inlet channel and the inside of the outer casing, while the other inlet channel remains connected to the inside of the outer casing. This eliminates the need for an additional separate adhesive injection process for the inlet channel, greatly reducing production costs and process complexity. Therefore, this invention solves the problems of high production costs and complex manufacturing processes in existing unidirectional flow dialysis fluid filters.

[0009] In addition, the dialysate filter auxiliary preparation structure proposed in this utility model may also have the following additional technical features:

[0010] Preferably, the inner sides of both ends of the outer shell are provided with anti-slip teeth.

[0011] Preferably, the outer sides of both ends of the outer shell are provided with mating bosses, the cross-section of the mating bosses is semi-circular, and the inner side of the glue injection cap is provided with a sealing groove that matches the mating bosses.

[0012] Preferably, the mating boss has an external thread on the side away from the end face of the outer shell, and the glue injection cap has an internal thread that matches the external thread.

[0013] Preferably, the inner sides of the first baffle plate and the second baffle plate are vertical and the outer sides are inclined, and the cross-sectional area of ​​the first baffle plate and the second baffle plate gradually decreases from one end near the middle of the outer shell to the other end.

[0014] Preferably, the inner side of the glue filling cap is provided with a positioning rib, and the outer shell is provided with a glue cutting positioning surface. The glue cutting positioning surface is used to position the shell when the glue is cut off after glue filling, and the positioning rib is used to mark the glue cutting position.

[0015] Preferably, the bottom inner side of the glue injection cap is provided with a fixing rib, and the outer shell is provided with a matching rib that is interference-fitted with the fixing rib.

[0016] Preferably, the top outer side of the glue-dispensing cap is provided with a positioning boss, and the bottom of the glue-dispensing cap is provided with a clearance groove. The positioning boss is used to connect and fix with the glue-dispensing equipment, and the clearance groove is used to avoid the liquid inlet channel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an auxiliary preparation structure for a dialysis fluid filter proposed in one embodiment of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of a dialysate filter auxiliary preparation structure after glue injection, as proposed in one embodiment of this utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the outer shell proposed in one embodiment of the present utility model;

[0020] Figure 4 This is a partial schematic diagram of one side of the outer shell according to one embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the adhesive injection cap proposed in one embodiment of the present invention;

[0022] Figure 6 This is a cross-sectional schematic diagram of the glue-injection cap proposed in one embodiment of the present utility model;

[0023] Figure 7 for Figure 3 A magnified view of a portion at point A;

[0024] Explanation of key component symbols:

[0025]

[0026] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figures 1 to 7 The diagram shows an auxiliary preparation structure for a dialysate filter according to an embodiment of the present invention, including a shell 10; a hollow fiber membrane tube 20 disposed inside the shell 10; and glue injection caps 30 disposed on both sides of the shell 10 for sealing both ends of the shell 10. The shell 10 has two liquid inlet channels 40 on its side, which communicate with the interior of the shell 10. A first glue baffle 11 and a second glue baffle 12 are respectively provided at both ends of the inner side of the shell 10. Both the first glue baffle 11 and the second glue baffle 12 extend from the middle section of the shell 10 towards both ends of the shell 10. The first glue baffle 11 and the second glue baffle 12 are directly opposite the two liquid inlet channels 40 and have a gap between them. The distance between the top of the first glue baffle 11 and the end face of the shell 10 on the same side is greater than the distance between the top of the second glue baffle 12 and the end face of the shell 10 on the same side.

[0031] Understandably, by placing the hollow fiber membrane tube 20 inside the outer casing 10, sealing both sides of the outer casing 10 with the glue-dispensing cap 30 to limit and fix the hollow fiber membrane tube 20, and installing it on a centrifugal glue-dispensing device, the centrifugal glue-dispensing device dispenses glue into the casing through the liquid inlet channel 40, and drives the outer casing 10 to rotate. This causes the glue flowing into the outer casing 10 from the two liquid inlet channels 40 to move towards the glue-dispensing caps 30 under centrifugal force. Furthermore, the first and second glue-dispensing plates 11 and 12 prevent the glue from dripping directly onto the hollow fiber membrane tube 20. Instead, the glue is guided towards both ends of the outer casing 10 by the first and second glue-dispensing plates 11 and 12, thus preventing the glue from directly contacting the hollow fiber membrane tube 20 and causing damage when it enters the outer casing 10. Furthermore, by setting the top of the first baffle plate 11 and the top of the second baffle plate 12 at different distances from the end face of the outer casing 10 on the same side, the thickness of the adhesive buildup on both sides is consistent when the amount of adhesive injected is the same. When one side of the second baffle plate 12 is just covered with adhesive, the opposite side of the first baffle plate 11 is not yet covered. At this point, adhesive injection is stopped, and after the adhesive cools, only the seal between one side of the liquid inlet channel 40 and the inside of the outer casing 10 is maintained. The adhesive injection cap 30 is removed, and excess adhesive at both ends of the outer casing 10 is cut off, thus completing the original adhesive injection and sealing process. This ensures that one side of the liquid inlet channel 40 is sealed from the inside of the outer casing 10, while the other side of the liquid inlet channel 40 remains connected to the inside of the outer casing 10. Therefore, there is no need to add a separate adhesive injection process for the liquid inlet channel 40, greatly reducing production costs and process difficulty. Therefore, this invention solves the problems of high production costs and complex production processes in existing unidirectional flow dialysis fluid filters.

[0032] It should be noted that, in specific implementation, auxiliary clamps can be used to clamp and position multiple hollow fiber membrane tubes 20, so that each hollow fiber membrane tube 20 is distributed equidistantly and orderly. Then, the two ends of the hollow fiber membrane tube 20 are sintered to seal and connect their end faces. Then, the auxiliary clamps are removed and placed into the outer shell 10, and fixed by the glue injection caps 30 on both sides. After the glue injection is completed, the two ends are cut off to remove the sintered parts and excess glue, so that the two ends of the hollow fiber membrane tube 20 are not sealed, thus completing the glue injection process.

[0033] Specifically, the inner sides of both ends of the outer casing 10 are provided with anti-slip teeth 13. In practice, after the adhesive is injected into the outer casing 10 and solidifies, the anti-slip teeth 13 increase the contact area between the adhesive and the outer casing 10, making the contact surface more complex and rough, thereby enhancing the adhesion between the adhesive and the outer casing 10. This ensures a firm bond between the inner wall of the outer casing 10 and the polyurethane adhesive, preventing leakage during product use. Furthermore, in practice, the serration height of the anti-slip teeth 13 can be 0.2mm-0.6mm, preferably 0.4mm. The number of serrations can be 180-220, preferably 200. By reasonably adjusting the number and height of the serrations, the adhesion between the adhesive and the outer casing 10 can be effectively guaranteed, while avoiding excessive processing difficulty.

[0034] Additionally, the outer ends of the outer shell 10 are provided with mating bosses 14, the cross-section of which is semi-circular. The inner side of the glue injection cap 30 is provided with a sealing groove 31 that matches the mating bosses 14. By setting the mating bosses 14 and sealing grooves 31 to fit together, the glue will not overflow during glue injection, thus affecting the glue injection effect. Furthermore, by setting the cross-section of the mating bosses 14 to be semi-circular, the fit between the mating bosses 14 and sealing grooves 31 is increased, thereby ensuring the sealing effect between the two and reducing the assembly difficulty between the mating bosses 14 and sealing grooves 31.

[0035] Specifically, the mating boss 14 has an external thread on the side away from the end face of the outer shell 10, and the glue injection cap 30 has an internal thread that matches the external thread. In practice, the glue injection cap 30 is installed on the outer shell 10 by rotation. When tightening, the threaded engagement allows the mating boss 14 and the sealing groove 31 to assemble and fit together by applying rotational force and utilizing the thread force. This method is less labor-intensive than simply pressing the glue injection cap 30 with force, and results in less wear between the mating boss 14 and the sealing groove 31 during assembly. Furthermore, after glue injection, the outer shell 10 needs to mate with the blood cap for filtering the dialysate. Therefore, the external thread on the outer shell 10 can adopt a double-thread structure, respectively matching the internal threads on the blood cap and the glue injection cap 30.

[0036] Furthermore, the inner sides of the first baffle plate 11 and the second baffle plate 12 are vertical, while the outer sides are inclined. The cross-sectional area of ​​the first baffle plate 11 and the second baffle plate 12 gradually decreases from one end near the middle of the outer casing 10 to the other end. In specific implementations, by setting the first baffle plate 11 and the second baffle plate 12 to an inclined shape, the adhesive is guided. The inclined setting, combined with centrifugal force, can reduce the resistance to the flow of the adhesive and improve the dispensing efficiency.

[0037] Specifically, the inner side of the glue-filling cap 30 is provided with a positioning rib 32, and the outer shell 10 is provided with a glue-cutting positioning surface 15. The glue-cutting positioning surface 15 is used to position the shell when the glue is cut after glue filling, and the positioning rib 32 is used to mark the glue cutting position. In specific implementation, after the glue filling is completed, the glue needs to be trimmed to ensure dimensional consistency and facilitate subsequent assembly and use. By setting the glue-cutting positioning surface 15, the outer shell 10 is fixed on the glue-cutting equipment. Then, the positioning rib 32 forms a recessed mark on the glue, and the excess polyurethane glue and hollow fiber membrane on both sides of the outer shell 10 are cut along the mark, thereby achieving unobstructed flow on both sides of the membrane and dimensional consistency.

[0038] Additionally, the bottom inner side of the glue-filling cap 30 is provided with a fixing rib 33, and the outer shell 10 is provided with a matching rib 16 that is interference-fitted with the fixing rib 33. Furthermore, in specific implementation, since the glue-filling cap 30 and the outer shell 10 are connected and fixed by threads, in order to prevent the glue-filling cap 30 from rotating relative to the outer shell 10 due to external contact and rotation, which would affect the sealing effect between the two, the fixing rib 33 and the matching rib 16 are additionally provided for interference fit. This makes the connection between the outer shell 10 and the glue-filling cap 30 tighter, and a single rotation cannot easily separate the glue-filling cap 30 from the outer shell 10. An outward pulling force is also required, thereby reducing the probability of the glue-filling cap 30 accidentally detaching.

[0039] Specifically, the top outer side of the glue filling cap 30 is provided with a positioning boss 34, and the bottom of the glue filling cap 30 is provided with a relief groove 35. The positioning boss 34 is used to connect and fix with the glue filling equipment, and the relief groove 35 is used to avoid the liquid inlet channel 40.

[0040] In summary, the dialysis fluid filter auxiliary preparation structure in the above embodiments of this utility model places the hollow fiber membrane tube 20 inside the outer shell 10, then seals both sides of the outer shell 10 with glue-filling caps 30 to limit and fix the hollow fiber membrane tube 20, and installs it on a centrifugal glue-filling device. The centrifugal glue-filling device dispenses glue into the shell through the inlet channel 40, and drives the outer shell 10 to rotate. This causes the glue flowing into the outer shell 10 from the two inlet channels 40 to move towards the glue-filling caps 30 under centrifugal force. Furthermore, the first and second glue-filling plates 11 and 12 prevent the glue from dripping directly onto the hollow fiber membrane tube 20. Instead, the glue is guided towards both ends of the outer shell 10 by the first and second glue-filling plates 11 and 12, thus preventing the glue from directly contacting the hollow fiber membrane tube 20 when it enters the outer shell 10. Damage to the fiber membrane tube 20 can be caused by contact. Furthermore, by setting the top of the first baffle plate 11 and the top of the second baffle plate 12 at different distances from the end face of the outer casing 10 on the same side, the thickness of the adhesive buildup on both sides is consistent when the amount of adhesive injected is the same. When one side of the second baffle plate 12 is just covered with adhesive, the opposite side of the first baffle plate 11 is not yet covered. At this point, adhesive injection is stopped, and after the adhesive cools, only the seal between one side of the inlet channel 40 and the inside of the outer casing 10 is maintained. The adhesive injection cap 30 is removed, and excess adhesive at both ends of the outer casing 10 is cut off, thus completing the original adhesive injection and sealing process. This ensures that one side of the inlet channel 40 is sealed from the inside of the outer casing 10, while the other side of the inlet channel 40 remains connected to the inside of the outer casing 10. Therefore, there is no need to add a separate adhesive injection process for the inlet channel 40, greatly reducing production costs and process complexity. Thus, this invention solves the problems of high production costs and complex manufacturing processes in existing unidirectional flow dialysis fluid filters.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A structure for assisting in the preparation of a dialysate filter, characterized in that, include: shell; A hollow fiber membrane tube is disposed inside the outer casing; The glue-filling caps are located on both sides of the outer casing and are used to seal the two ends of the outer casing; The outer casing has two liquid inlet channels on its side, which are connected to the interior of the outer casing. The inner sides of the outer casing are provided with a first baffle plate and a second baffle plate, which extend from the middle section of the outer casing to both ends. The first baffle plate and the second baffle plate are directly opposite the two liquid inlet channels and have gaps between them. The distance between the top of the first baffle plate and the end face of the outer casing on the same side is greater than the distance between the top of the second baffle plate and the end face of the outer casing on the same side.

2. The auxiliary preparation structure for a dialysate filter according to claim 1, characterized in that, The inner sides of both ends of the outer shell are provided with anti-slip teeth.

3. The auxiliary preparation structure for a dialysate filter according to claim 1, characterized in that, The outer sides of both ends of the outer shell are provided with mating bosses, the cross-section of the mating bosses is semi-circular, and the inner side of the glue injection cap is provided with a sealing groove that matches the mating bosses.

4. The auxiliary preparation structure for a dialysate filter according to claim 3, characterized in that, The mating boss has an external thread on the side away from the end face of the outer shell, and the glue injection cap has an internal thread that matches the external thread.

5. The auxiliary preparation structure for a dialysate filter according to claim 1, characterized in that, The inner sides of the first and second baffle plates are vertical and the outer sides are inclined. The cross-sectional areas of the first and second baffle plates gradually decrease from one end near the middle of the outer shell to the other end.

6. The auxiliary preparation structure for a dialysate filter according to claim 1, characterized in that, The inner side of the glue-filling cap is provided with a positioning rib, and the outer shell is provided with a glue-cutting positioning surface. The glue-cutting positioning surface is used to position the shell when the glue is cut off after glue filling, and the positioning rib is used to mark the glue cutting position.

7. The auxiliary preparation structure for a dialysate filter according to claim 1, characterized in that, The bottom inner side of the glue injection cap is provided with a fixing rib, and the outer shell is provided with a matching rib that is interference-fitted with the fixing rib.

8. The auxiliary preparation structure for a dialysate filter according to any one of claims 1 to 7, characterized in that, The top outer side of the glue-dispensing cap is provided with a positioning boss, and the bottom of the glue-dispensing cap is provided with a clearance groove. The positioning boss is used to connect and fix with the glue-dispensing equipment, and the clearance groove is used to avoid the liquid inlet channel.

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