Hemodialyzer shell

Abstract

The utility model provides a hemodialyzer shell which solves the problems that an existing hemodialyzer shell is unreasonable in structural design and poor in dialysis quality. A dialysis chamber is arranged in the shell, necks are arranged at the two ends of the shell, annular baffle rings arranged on the same ring with the shell are arranged on the inner sides of the necks, a dialysate inlet and outlet cavity is formed between the annular baffle rings and the necks, and the bottom face of the dialysate inlet and outlet cavity is a quadric surface. A plurality of communicating grooves which are distributed in the circumferential direction and used for communicating the dialysate inlet and outlet cavity with the dialysis chamber are formed in the annular baffle ring, the bottom surfaces of the communicating grooves jointly form a quadric surface opposite to the quadric surface in direction, and sealant used for fixing the hollow fiber membrane bundle and sealing the dialysis chamber is arranged in the neck part; a dialysate inlet and outlet communicated with the dialysate inlet and outlet cavity is formed in the side part of the neck part, an end cover is arranged at the end part of the neck part, and a blood chamber inlet and outlet is formed in the end cover. Through fluid calculation and analysis, the quadric surface structure is superior to a common straight surface structure, so that dialysate is more uniformly distributed in and out.

Description

Technical Field

[0001] The utility model belongs to the technical field of hemodialyzers and relates to a hemodialyzer housing. Background Art

[0002] Currently, many hemodialyzer housings made of PP materials by injection molding and welded by hot plates have emerged on the market. Compared with the hemodialyzer housings made of PC materials by injection molding and ultrasonically welded, they have the advantages of convenient use, light weight, and low cost.

[0003] However, the existing hemodialyzers using the hot plate welding process have the following drawbacks:

[0004] 1. Both the blood chamber inlet and outlet and the dialysate inlet and outlet are arranged on the end cap, which makes the end cap occupy a large amount of space and the neck of the housing is very short. Therefore, the bottom surface of the neck can only be made into a flat surface without height difference and cannot be made into other more optimal curved surfaces according to the need of dialysate flow; 2. When the dialysate enters and exits from the bottom of the end cap, it has to pass through the sealant both when entering and exiting, and is also affected by the welding edge, resulting in an overly narrow flow space during entry and exit, affecting the entry and exit of the dialysate; 3. The weld line is exposed in the dialysis chamber and directly contacts the dialysate, affecting the dialysis quality. Summary of the Utility Model

[0005] The purpose of the present utility model is to address the above problems existing in the prior art and propose a hemodialyzer housing that can improve the dialysis quality.

[0006] The purpose of the present utility model can be achieved by the following technical solutions:

[0007] A hemodialyzer housing, including a housing that is cylindrical and has a dialysis chamber inside. Both ends of the housing have necks. An annular retaining ring that is concentric with the housing is provided inside the necks. A dialysate inlet and outlet chamber is formed between the annular retaining ring and the necks. The bottom surface of the dialysate inlet and outlet chamber is a quadratic surface. A plurality of circumferentially distributed communication grooves for communicating the dialysate inlet and outlet chamber with the dialysis chamber are provided on the annular retaining ring. The bottom surfaces of the plurality of communication grooves together form a quadratic surface with a direction opposite to that of the above quadratic surface. A sealant for fixing the hollow fiber membrane bundle and sealing the dialysis chamber is provided inside the necks. A dialysate inlet and outlet communicating with the dialysate inlet and outlet chamber is provided on the side of the necks. An end cap is provided at the end of the necks, and a blood chamber inlet and outlet is provided on the end cap.

[0008] By making the bottom surface of the dialysate inlet and outlet chamber into a quadratic surface and making the bottom surfaces of the plurality of communication grooves into a quadratic surface with a direction opposite to that of the above quadratic surface, through fluid calculation and analysis, this structure is superior to the ordinary straight surface structure and makes the distribution of the dialysate inlet and outlet more uniform.

[0009] In the above-mentioned hemodialyzer housing, the dialysate inlet and outlet chambers located at both ends of the housing are symmetrically arranged, and the distance between the two dialysate inlet and outlet chambers gradually changes along with the quadratic surface of the bottom surface of the dialysate inlet and outlet chambers. The dialysate inlet and outlet are located on the side where the distance between the two dialysate inlet and outlet chambers is the closest. The internal space on the side where the distance between the two dialysate inlet and outlet chambers is the closest reaches the maximum. By arranging the dialysate inlet and outlet at this place, the distribution of the inflow and outflow of the dialysate is more sufficient.

[0010] In the above-mentioned hemodialyzer housing, a sealing ring is provided between the neck, the sealing glue and the end cap, which surrounds the blood chamber inside the end cap. This improves the sealing performance and prevents leakage.

[0011] In the above-mentioned hemodialyzer housing, a first mounting groove is provided on the end cap, and a second mounting groove opposite to the first mounting groove is provided at the intersection of the neck and the sealing glue. The sealing ring is installed in the first mounting groove and the second mounting groove.

[0012] The stability of the sealing ring is improved by the first mounting groove and the second mounting groove.

[0013] In the above-mentioned hemodialyzer housing, a welding ring is provided on the neck outside the sealing ring, and the end cap is fixedly connected to the welding ring by welding.

[0014] Since the welding ring is located outside the sealing ring, the welding fusion line generated by welding is blocked by the neck and the sealing ring, and will not be in direct contact with the blood and the dialysate, thus not affecting the dialysis quality.

[0015] Compared with the prior art, the housing of this hemodialyzer has the following advantages: The bottom surface of the dialysate inlet and outlet chamber is made into a quadratic surface, and the bottom surfaces of several communication grooves are made into quadratic surfaces with the opposite direction to the above-mentioned quadratic surface. Through fluid calculation and analysis, this structure is superior to the ordinary straight surface structure, making the distribution of the inflow and outflow of the dialysate more uniform; The dialysate inlet and outlet are arranged on the side with the largest internal space of the dialysate inlet and outlet chamber, making the distribution of the inflow and outflow of the dialysate more sufficient. At the same time, when the dialysate flows in and out, it will not flow through the sealing glue and is not affected by the sealing glue; The sealing ring and the neck separate the fusion line from the blood chamber and the dialysis chamber, so that the fusion line will not affect the dialysis quality. Brief Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the housing of this hemodialyzer.

[0017] Figure 2 is a cross-sectional view of the housing of this hemodialyzer.

[0018] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0019] In the figure, 1 is the housing; 2 is the neck; 3 is the annular retaining ring; 4 is the dialysate inlet / outlet chamber; 5 is the communication groove; 6 is the sealant; 7 is the dialysate inlet / outlet; 8 is the end cap; 9 is the blood chamber inlet / outlet; 10 is the sealing ring; 11 is the welding ring. Detailed implementation manners

[0020] The following are specific embodiments of the present utility model and in combination with the accompanying drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0021] As Figure 1 and Figure 2 shown, the hemodialyzer housing includes a housing 1 with a dialysis chamber inside and in a cylindrical shape. Both ends of the housing 1 have necks 2 with an inner diameter larger than the inner diameter of the dialysis chamber. The inner side of the neck 2 has an annular retaining ring 3 arranged concentrically with the housing 1. An annular dialysate inlet / outlet chamber 4 is formed between the annular retaining ring and the neck 2. One end face (i.e., the bottom surface of the dialysate inlet / outlet chamber 4) of the dialysate inlet / outlet chamber 4 close to the middle of the housing 1 is a quadratic surface with a height difference.

[0022] As Figure 2 and Figure 3 shown, the annular retaining ring 3 is provided with a plurality of circumferentially distributed communication grooves 5 for communicating the dialysate inlet / outlet chamber 4 with the dialysis chamber. The length directions of the plurality of communication grooves 5 extend along the axial direction of the housing 1. The bottom surfaces of the several communication grooves 5 together form a quadratic surface opposite to the direction of the above quadratic surface. Through fluid calculation and analysis, this quadratic surface structure is superior to the ordinary straight surface structure, making the distribution of the dialysate inlet and outlet more uniform.

[0023] As Figure 3 shown, the neck 2 is provided with a sealant 6 for fixing the hollow fiber membrane bundle and sealing the dialysis chamber. The side of the neck 2 is provided with a dialysate inlet / outlet 7 communicating with the dialysate inlet / outlet chamber 4. The end of the neck 2 is provided with an end cap 8, and the end cap 8 is provided with a blood chamber inlet / outlet 9. The dialysate enters the dialysate inlet / outlet chamber 4 from one of the dialysate inlets / outlets 7, and then enters the dialysis chamber through the communication groove 5. It enters the dialysis chamber from the end face of the sealant and does not flow through the sealant, and the sealant will not affect the dialysate.

[0024] As Figure 1 and Figure 2 shown, the dialysate inlet / outlet chambers 4 at both ends of the housing 1 are symmetrically arranged. The distance between the two dialysate inlet / outlet chambers 4 gradually changes with the quadratic surface of the bottom surface of the dialysate inlet / outlet chamber 4. The dialysate inlet / outlet 7 is located on the side where the distance between the two dialysate inlet / outlet chambers 4 is the closest. The internal space on the side where the distance between the two dialysate inlet / outlet chambers 4 is the closest reaches the maximum. By arranging the dialysate inlet / outlet 7 at this place, the distribution of the dialysate inlet and outlet is more sufficient.

[0025] As Figure 3As shown, a sealing ring 10 is provided between the neck 2, the sealant 6 and the end cap 8, which is arranged around the blood chamber inside the end cap 8 to improve the sealing performance and prevent leakage.

[0026] To improve the stability of the sealing ring 10, as Figure 3 shown, a first installation groove is provided on the end cap 8, and a second installation groove opposite to the first installation groove is provided at the intersection of the neck 2 and the sealant 6. The sealing ring 10 is installed in the first installation groove and the second installation groove.

[0027] As Figure 3 shown, a welding ring 11 is provided on the neck 2 outside the sealing ring 10, and the end cap 8 is fixedly connected to the welding ring 11 by welding. Since the welding ring 11 is located outside the sealing ring 10, the weld line generated by welding is blocked by the neck 2 and the sealing ring 10 and will not be in direct contact with the blood and the dialysate, thus not affecting the dialysis quality.

[0028] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A hemodialyzer housing, characterized in that: The invention comprises a cylindrical shell (1) having a dialysate chamber inside, the shell (1) having a neck (2) at both ends, the inner side of the neck (2) having an annular retaining ring (3) arranged in the same ring as the shell (1), a dialysate inlet and outlet cavity (4) being formed between the annular retaining ring (3) and the neck (2), the bottom surface of the dialysate inlet and outlet cavity (4) being a quadratic surface, the annular retaining ring (3) being provided with a plurality of circumferentially distributed connecting grooves (5) for connecting the dialysate inlet and outlet cavity (4) and the dialysate chamber, the bottom surfaces of the plurality of connecting grooves (5) jointly forming a quadratic surface in the opposite direction to the quadratic surface, a sealant (6) for fixing a hollow fiber membrane bundle and sealing the dialysate chamber being provided inside the neck (2), a dialysate inlet and outlet (7) communicating with the dialysate inlet and outlet cavity (4) being provided on the side of the neck (2), an end cap (8) being provided at the end of the neck (2), and a blood chamber inlet and outlet (9) being provided on the end cap (8).

2. The hemodialyzer housing according to claim 1, characterized in that: The dialysate inlet and outlet chambers (4) at both ends of the shell (1) are symmetrically arranged, and the distance between the two dialysate inlet and outlet chambers (4) gradually changes with the quadratic surface of the bottom surface of the dialysate inlet and outlet chamber (4), and the dialysate inlet and outlet (7) is located on the side of the two dialysate inlet and outlet chambers (4) that is closest to each other.

3. The hemodialyzer housing according to claim 1 or 2, characterized in that: A sealing ring (10) is provided between the neck (2), the sealant (6) and the end cover (8) and surrounds the blood chamber inside the end cover (8).

4. The hemodialyzer housing according to claim 3, characterized in that: The end cover (8) is provided with a first mounting groove, the intersection of the neck (2) and the sealant (6) is provided with a second mounting groove opposite to the first mounting groove, and the sealing ring (10) is installed in the first mounting groove and the second mounting groove.

5. The hemodialyzer housing according to claim 3, characterized in that: The neck (2) is provided with a welding ring (11) located outside the sealing ring (10), and the end cover (8) is fixedly connected to the welding ring (11) by welding.

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