Hemoperfusion device shell

Abstract

The utility model provides a hemoperfusion device shell which solves the problem that an existing hemoperfusion device shell is poor in sealing performance. The hemoperfusion device shell comprises a cylindrical shell body, resin is packaged in the shell body through two filter screens, the filter screens are positioned on the shell body through a filter screen rack, an end cover with an inlet and an outlet is arranged at the end of the shell body, a sealing ring is arranged between the end cover and the shell body, the sealing ring and the shell body are in linear sealing, and the sealing ring and the end cover are in linear sealing. Due to the fact that the sealing ring and the shell are in linear sealing, and the sealing ring and the end cover are in linear sealing, compared with surface sealing, the sealing performance of the shell of the perfusion device is effectively improved. Meanwhile, convex ribs are arranged on the inner side of the end cover, the inner surface of the end cover is a smooth curved surface, blood flowing can be improved, and blood coagulation can be prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of blood perfusion devices and relates to a blood perfusion device shell. Background Art

[0002] Most of the perfusion devices on the market have a cylindrical shell with end caps on the top and bottom. The end caps have blood inlets and outlets. Blood flows into the perfusion device from the bottom and flows out from the top. The resin inside absorbs fat-soluble medium and large molecules in the blood, which plays a role in purifying the blood. The resin must be isolated inside the perfusion device shell with a filter mesh frame and cannot flow out of the perfusion device with the blood. The perfusion device must be sealed and no leakage can occur.

[0003] The existing perfusion device uses surface sealing between the shell, end cover and sealing ring, resulting in poor sealing; the filter mesh frame and sealing ring are exposed at the outlet end and directly contact the blood at the outlet, which can easily cause coagulation; the sealing ring, filter mesh frame and other components are all asymmetric structures, which makes it impossible to achieve fully automatic assembly. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a blood perfusion device housing with good sealing performance.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The blood perfusion device housing comprises a cylindrical housing, in which resin is encapsulated through two filter screens, the filter screens are positioned on the housing through a filter screen frame, an end cover with an inlet and outlet is provided at the end of the housing, a sealing ring is provided between the end cover and the housing, a wire seal is formed between the sealing ring and the housing, and a wire seal is formed between the sealing ring and the end cover.

[0007] Since there is a line seal between the sealing ring and the housing, and a line seal between the sealing ring and the end cover, the sealing performance of the perfusion device housing is effectively improved compared to the surface seal.

[0008] In the above-mentioned blood perfusion device shell, an annular step for installing a filter mesh frame is provided on the inner side of the end of the shell, the distance from the end face of the annular step to the end face of the shell is greater than the thickness of the filter mesh frame, the side face of the annular step intersects with the end face of the shell to form an intersection line, and the intersection line is pressed against the sealing ring.

[0009] The intersection line formed by the intersection of the side surface of the annular step and the end surface of the shell is pressed against the sealing ring, thereby forming a line seal between the shell and the sealing ring.

[0010] In the above-mentioned blood perfusion device housing, a limiting groove for installing a sealing ring is formed on the end cover, the width of the limiting groove gradually decreases along the depth direction, and an arc surface is provided at the intersection of the side surface and the bottom surface of the limiting groove. The cross-section of the sealing ring is rectangular, and the intersection line of the annular surface and the end surface of the sealing ring is pressed against the arc surface.

[0011] The intersection line between the sealing ring surface and the end surface is pressed against the arc surface, thereby realizing line sealing between the end cover and the sealing ring.

[0012] In the above-mentioned blood perfusion device housing, the end cover is provided with an annular convex rib on the inner side of the limiting groove, and the end surface of the convex rib abuts against the filter screen.

[0013] The convex rib contacts the filter or slightly squeezes the filter so that the blood flowing out of the filter does not interact with the filter frame and the sealing ring, thereby preventing the blood from being trapped in the gaps and grooves and causing blood coagulation.

[0014] In the above-mentioned blood perfusion device housing, the inner surface of the end cap is a smooth curved surface. The smooth curved surface allows blood to flow more smoothly. The inner annular surface of the convex rib is in a large arc shape, which smoothly transitions with the inner surface of the end cap, thereby improving blood fluidity.

[0015] In the above-mentioned blood perfusion device housing, the inner side surface of the filter mesh frame has an inclined first guide slope, and the convex rib has a second guide slope with an inclination different from that of the first guide slope, and the second guide slope is pressed on the first guide slope.

[0016] After assembly, the second guide bevel is pressed on the first guide bevel to play a positioning and tightening role, and at the same time, it can automatically correct slight deviations in the automatic assembly.

[0017] In the above-mentioned blood perfusion device housing, the outer side surface of the filter mesh frame has a third guiding inclined surface arranged obliquely, so as to facilitate the filter mesh frame to enter the annular step. In order to further improve the guiding effect, the side surface of the annular step can be arranged as an inclined surface.

[0018] In the above-mentioned blood perfusion device housing, the filter is located in the middle of the filter frame, and the filter frame is symmetrically arranged along the plane where the filter is located. The cross section of the sealing ring is rectangular, so that the end faces at both ends are the same, and there is no need to distinguish the direction during assembly. The filter frame is symmetrically arranged along the plane where the filter is located, and there is no need to distinguish the direction during assembly, which is conducive to achieving full-automatic assembly.

[0019] Compared with the prior art, the blood perfusion device housing has the following advantages: since there is a line seal between the sealing ring and the housing, and a line seal between the sealing ring and the end cover, the sealing performance of the blood perfusion device housing is effectively improved; the inner side of the end cover has a convex rib, which contacts the filter or slightly squeezes the filter, so that the blood flowing out of the filter does not interact with the filter frame and the sealing ring, preventing the blood from being trapped in the gap and groove and causing blood coagulation; there is no need to distinguish the direction of the sealing ring and the filter frame during assembly, which is conducive to fully automatic assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the shell of the blood perfusion device.

[0021] Figure 2 yes Figure 1 Enlarged schematic diagram at point A in the middle.

[0022] Figure 3 yes Figure 2 Schematic diagram of the structure of the medium filter mesh frame.

[0023] In the figure, 1. The housing; 11. Annular step; 2. Filter mesh frame; 21. First guide inclined surface; 22. Third guide inclined surface; 3. End cover; 31. Arc surface; 32. Convex ribs; 33. Second guide inclined surface; 4. Sealing ring. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 The blood perfusion device housing shown in the figure comprises a cylindrical housing 1, and end caps 3 are connected to both ends of the housing 1 by threads, and an inlet and outlet are arranged on the end caps 3, and the inlet and outlet located on the lower end end cap 3 is used for blood inlet, and the inlet and outlet located on the upper end end cap 3 is used for blood outlet. A sealing ring 4 is arranged between the end cap 3 and the housing 1, and a line seal is formed between the sealing ring 4 and the housing 1, and a line seal is formed between the sealing ring 4 and the end cap 3, which effectively improves the sealing performance of the perfusion device housing.

[0026] like Figure 1 As shown, the housing 1 is encapsulated with resin through two filter screens, and the filter screens are positioned on the housing 1 through the filter screen frame 2. In order to position the filter screen frame 2, as shown in FIG. Figure 2 It is shown that an annular step 11 is provided on the inner side of the end portion of the housing 1. The distance between the end surface of the annular step 11 and the end surface of the housing 1 is slightly greater than the thickness of the filter mesh frame 2. The side surface of the annular step 11 intersects with the end surface of the housing 1 to form an intersecting line, and the intersecting line is tightly attached to the sealing ring 4, thereby forming a linear seal between the housing 1 and the sealing ring 4.

[0027] like Figure 2It is shown that a limit groove for mounting the sealing ring 4 is formed on the end cover 3 , and the width of the limit groove gradually decreases in the depth direction. An arc surface 31 is provided at the intersection of the side surface of the limit groove and the bottom surface. The cross-section of the sealing ring 4 is rectangular, and the intersection line between the annular surface of the sealing ring 4 and the end surface is tightly attached to the arc surface 31 , thereby realizing a linear seal between the end cover 3 and the sealing ring 4 .

[0028] like Figure 2 As shown, the end cap 3 is located on the inside of the limit groove, with an annular convex rib 32. The convex rib 32 contacts the filter screen or slightly squeezes the filter screen, so that the blood flowing out of the filter screen does not function with the filter screen frame 2 and the sealing ring 4, preventing the blood from being trapped by the gaps and grooves and coagulation.

[0029] like Figure 1 As shown, the inner surface of the end cap 3 is a smooth curved surface, which can make blood flow more smoothly. The inner annular surface of the rib 32 is a large arc shape, which smoothly transitions with the inner surface of the end cap 3, which can improve blood fluidity.

[0030] like Figure 3 As shown, the inner side of the filter frame 2 has a first guide slope 21 arranged obliquely. Figure 2 As shown, the convex rib 32 has a second guide inclination 33 with a different slope than the first guide inclination 21 . The second guide inclination 33 is pressed on the first guide inclination 21 , which plays a positioning and tightening role, and can automatically correct when the automatic assembly is slightly deviated.

[0031] like Figure 3 It is shown that the outer side of the filter mesh frame 2 has a third guide inclined inclined surface 22 to facilitate the filter mesh frame 2 to enter the annular step 11 . In order to further improve the guiding effect, the side surface of the piece ring step 11 is arranged as a bevel.

[0032] like Figure 3 It is shown that the filter mesh is located in the middle of the filter mesh rack 2, and the filter mesh rack 2 is arranged symmetrically along the plane where the filter mesh is located. The sealing ring 4 has a rectangular cross-section, making the end faces of both ends the same. There is no need to distinguish directions during assembly. The filter grid 2 is symmetrically arranged along the plane where the filter is located, and there is no need to distinguish directions during assembly, which is conducive to achieving full automatic assembly.

[0033] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A blood perfusion device housing, characterized in that: The invention comprises a cylindrical shell (1), wherein resin is encapsulated in the shell (1) via two filter screens, wherein the filter screens are positioned on the shell (1) via a filter screen frame (2), wherein an end cover (3) with an inlet and outlet is provided at the end of the shell (1), wherein a sealing ring (4) is provided between the end cover (3) and the shell (1), wherein a line seal is formed between the sealing ring (4) and the shell (1), and a line seal is formed between the sealing ring (4) and the end cover (3).

2. The hemoperfusion device housing according to claim 1, characterized in that: An annular step (11) for mounting a filter mesh frame (2) is provided on the inner side of the end of the shell (1); the distance between the end face of the annular step (11) and the end face of the shell (1) is greater than the thickness of the filter mesh frame (2); the side face of the annular step (11) intersects with the end face of the shell (1) to form an intersection line, and the intersection line is tightly pressed against the sealing ring (4).

3. The blood perfusion device housing according to claim 1 or 2, characterized in that: The end cover (3) is formed with a limiting groove for mounting the sealing ring (4), the width of the limiting groove gradually decreases along the depth direction, an arc surface (31) is provided at the intersection of the side surface and the bottom surface of the limiting groove, the cross section of the sealing ring (4) is rectangular, and the intersection line of the annular surface and the end surface of the sealing ring (4) is pressed against the arc surface (31).

4. The hemoperfusion device housing according to claim 3, characterized in that: The end cover (3) is provided with an annular convex rib (32) located on the inner side of the limiting groove, and the end surface of the convex rib (32) abuts against the filter screen.

5. The hemoperfusion device housing according to claim 3, characterized in that: The inner surface of the end cover (3) is a smooth curved surface.

6. The hemoperfusion device housing according to claim 4, characterized in that: The inner side surface of the filter mesh frame (2) has a first inclined guide surface (21) which is arranged obliquely, and the convex rib (32) has a second inclined guide surface (33) which has an inclination different from that of the first inclined guide surface (21), and the second inclined guide surface (33) is pressed on the first inclined guide surface (21).

7. The hemoperfusion device housing according to claim 1, characterized in that: The outer side surface of the filter mesh frame (2) is provided with a third guiding inclined surface (22) which is arranged obliquely.

8. The hemoperfusion device housing according to claim 1, characterized in that: The filter screen is located in the middle of the filter screen frame (2), and the filter screen frame (2) is symmetrically arranged along the plane where the filter screen is located.

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