CN211327271U

CN211327271U - Blood purification hollow fiber membrane type filter with improved structure

Info

Publication number: CN211327271U
Application number: CN201921455946.1U
Authority: CN
Inventors: 董凡; 高晋权; 黄燊传
Original assignee: Jafron Biomedical Co Ltd
Current assignee: Jafron Biomedical Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-08-25
Anticipated expiration: 2029-08-30

Abstract

The utility model relates to a blood purification hollow fiber membrane type filter with improved structure, which belongs to the field of medical appliances. The blood purification hollow fiber membrane filter comprises a cylinder, a hollow fiber membrane bundle sleeved in the cylinder and a packaging rubber block used for fixing two end parts of the hollow fiber membrane bundle on the inner wall of a port of the cylinder in a liquid-tight manner; one of the inner wall of the port and the packaging rubber block is provided with a sleeving groove, the other one is provided with a clamping sleeve end part embedded in the sleeving groove, and the necking groove wall surface of the sleeving groove is used for applying a stopping clamping pulling force which is at least outward and radial on the cylinder body to the clamping sleeve end part. Based on the improvement of the connection structure between the packaging rubber block and the cylinder body, the fixed connection performance between the bonding part between the packaging rubber block and the cylinder body is improved, the problem of tearing or cracking between the packaging rubber block and the cylinder body is effectively solved, and the packaging rubber block and the cylinder body can be widely applied to the field of clinical treatment.

Description

Blood purification hollow fiber membrane type filter with improved structure

Technical Field

The utility model relates to the field of medical equipment, specifically speaking relates to a blood purifier of institutional advancement.

Background

The blood purifying hollow fiber type filter product includes hemodialyzer, hemodiafiltration device, hemofiltration device, plasma separator, plasma component separator and other products, and has the structure including cylinder, hollow fiber membrane bundle inside the cylinder, sealing rubber blocks for fixing the two ends of the hollow fiber membrane bundle onto the port of the cylinder in liquid-tight mode, detachable end caps and elastic sealing rings between the end caps and the end of the cylinder, dialysis liquid flow holes in the end of the cylinder, and blood flow holes in the end caps, with the difference being that different hollow fiber membranes are used, blood flows through the holes in the end caps and through the inner holes in the hollow fiber membrane bundle, and dialysis liquid enters the cylinder via the two dialysis liquid holes and flows through the outer surface of the hollow fiber membrane bundle, thus, the function of purifying blood is achieved by the action of the hollow fiber membrane, and examples thereof include a blood purifier disclosed in patent publication No. CN108114334A and a plasma separation adsorber disclosed in patent publication No. CN 102631722A.

In the process of packaging the blood purification product, the packaging glue made of liquid polymer material is used for sealing gaps between the cylinder and the hollow fiber membrane bundle and between the hollow fiber membranes, so as to form a packaging glue block, but because the cylinder and the packaging glue block are made of polymer materials with different physical and chemical properties, the bonded part between the packaging glue block and the cylinder is easy to tear or crack due to the difference of physicochemical properties such as hardness and shrinkage of the materials and the influence of processing technologies such as cutting and drying of the packaged product, so that the problem that the blood side of the blood purification filter product is communicated with the outer side of the hollow fiber membranes is caused.

In order to solve the above problems, the conventional solutions in the industry are to process the two ends of the cylinder, typically to perform a zigzag knurling process on the inner surface of the ends to increase the surface area of the adhesive contact between the potting adhesive blocks and the inner surface of the cylinder to increase the adhesion, or to perform a chemical treatment such as modification on the inner surface of the cylinder to directly enhance the adhesion between the potting adhesive and the cylinder. However, in the subsequent processes of cutting, drying and the like, the material is easy to shrink due to drying and heating, and the shearing force in the cutting process is easy to occur, so that the problem that the bonding position between the packaging rubber block and the cylinder body still has high probability of tearing or cracking still exists.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a blood purification hollow fiber membrane type filter of institutional advancement to improve the encapsulation and glue the rigid coupling performance between the bonding department between piece and barrel, solved the problem of tearing or ftractureing between the two effectively.

In order to achieve the main object, the present invention provides a hollow fiber membrane filter for blood purification, which comprises a cylinder, a hollow fiber membrane bundle sleeved in the cylinder, and a sealing rubber block for liquid-tightly fixing two ends of the hollow fiber membrane bundle on the inner wall of the port of the cylinder; one of the inner wall of the port and the packaging rubber block is provided with a sleeving groove, the other one is provided with a clamping sleeve end part embedded in the sleeving groove, and the necking groove wall surface of the sleeving groove is used for applying a stopping clamping pulling force which is at least outward and radial on the cylinder body to the clamping sleeve end part.

The necking groove face of the sleeving groove is clamped and matched with the stop block embedded on the outer wall face of the expansion end part in the sleeving groove, so that the stop block is arranged between the packaging rubber block and the barrel body, and the stop block is abutted to the surface bonding adhesive force of the shearing force generated by the shrinkage force and cutting during drying, so that the fixed connection performance between the bonding parts between the packaging rubber block and the barrel body can be improved, and the problem of tearing or cracking between the packaging rubber block and the barrel body is effectively solved.

The specific scheme is that the sleeving groove is provided with a notch on one side which is in the radial direction and is adjacent to the other side, and the wall surface of the necking groove is positioned on one side of the notch, which is deviated from the other side; the connecting part which is arranged in a radially extending manner and passes through the notch is arranged between the end part of the cutting sleeve and the main body part of the other cutting sleeve.

More specifically, the end part of the cutting sleeve is an expansion end part; the sleeving groove is provided with an expansion groove cavity which is matched with the end part of the clamping sleeve and is larger than the notch in size.

The further proposal is that the sheathing groove is a T-shaped groove or a dovetail groove.

A further proposal is that the T-shaped groove is arranged on the end part of the cylinder body; the transverse groove part of the T-shaped groove part is of an arc-shaped groove structure, and the arc-shaped groove structure is connected into an annular integrated structure along the circumferential direction of the barrel. Utilize the harder barrel of material to form the annular groove structure, can improve the packing effectively and glue supporting backstop power between piece and the barrel.

In another more specific scheme, the wall surface of the inner wall of the port is provided with a sleeving groove along the radial inner concave direction at the two end parts of the cylinder, and the notch is positioned on the wall surface of the inner wall of the port.

The preferred solution is that the sleeving groove has open ends on both end faces of the cylinder.

More preferably, the sleeving groove takes the open end as a cross section and is arranged along the axial extension of the cylinder body.

Another preferred embodiment is that the end cap and/or the elastic sealing ring, which can be removably fitted over the end of the cylinder, have a body that presses against the potting compound in the axial direction of the cylinder.

In another preferred scheme, in the axial direction of the cylinder, the inner end face of the packaging rubber block is positioned on one side of the groove wall face of the sheathing groove, which deviates from the end face of the cylinder port where the packaging rubber block is installed. So as to further improve the sealing performance of the packaging adhesive block.

Drawings

Fig. 1 is a perspective view of a cylinder in embodiment 1 of the present invention;

FIG. 2 is an enlarged view of a portion C of FIG. 1;

FIG. 3 is a partial structure view of the combination of the packaging rubber block and the barrel in embodiment 1 of the present invention;

FIG. 4 is an enlarged view of E in FIG. 1;

fig. 5 is a partial structure view of a combined part of a packaging rubber block, a cylinder body and an end cover in embodiment 1 of the present invention;

fig. 6 is a perspective view of a cylinder in embodiment 2 of the present invention;

FIG. 7 is an enlarged view of a portion A of FIG. 6;

fig. 8 is a top view of a cylinder in embodiment 2 of the present invention;

FIG. 9 is an enlarged view of a portion B of FIG. 8;

fig. 10 is a partial structure view of a combination portion of a packaging adhesive block and a barrel in embodiment 2 of the present invention;

fig. 11 is a perspective view of a cylinder in embodiment 3 of the present invention;

FIG. 12 is an enlarged view of a portion D of FIG. 11;

fig. 13 is a partial structure view of a combination portion of a packaging adhesive block and a barrel in embodiment 3 of the present invention;

fig. 14 is a partial structure view of a joint portion between a package adhesive block and a barrel in embodiment 4 of the present invention.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

The utility model discloses mainly glue the connection structure between piece and the barrel to the encapsulation and improve, with the power outside adhesive force such as improvement bonding force, be used for resisting the shearing force when cutting and the shrink force when being heated the drying, and improve the rigid coupling performance between the bonding department between encapsulation gluey piece and barrel, the problem of tearing or ftracturing between the two has been solved effectively, in view of the above, in the following embodiment, only carry out the exemplary explanation to connection structure between the two, to the barrel, hollow fiber membrane restraints, the concrete structure of components such as end cover, can design with reference to the structure of current product.

Example 1

Referring to fig. 1 to 5, the blood purification hollow fiber membrane filter of the present invention comprises a cylinder 1, an end cap 9, a sealing ring, a hollow fiber membrane bundle sleeved in the cylinder, and a sealing rubber block 2 for liquid-tightly fixing the two ends of the hollow fiber membrane bundle on the inner wall of the port of the cylinder 1. The sealing ring and the hollow fiber membrane bundle are not shown in the figures, and specific structures of existing products can be referred to.

A plurality of separated T-shaped grooves 3 are arranged at the inner walls of the ports at the two ends of the cylinder body 1, and the notches 30 of the T-shaped grooves 3 are arranged on the inner walls of the ports of the cylinder body 1, namely, the wall surface of the inner wall of the port of the cylinder body 1 is inwards provided with a sleeving groove 3 along the radial direction and is provided with an open end 31 arranged on the end surface of the cylinder body 1; specifically, the transverse groove portions of the T-shaped groove 3 are all arc-shaped groove structures, and the arc lengths of the arc-shaped groove structures are arranged along the circumferential direction of the cylinder 1. Wherein the T-shaped groove 3 constitutes the sheathing groove in the present embodiment. In addition, in order to facilitate the simultaneous formation of the sheathing groove during the manufacture of the cylinder 1, the T-shaped groove 3 has an equi-large structure with an open end 31 as a cross section and arranged extending in the axial direction of the cylinder 1.

In the packaging process, the liquid packaging adhesive not only fills the gap between the hollow fiber membranes and the port part of the cylinder body 1, but also fills the T-shaped groove 3, and the packaging adhesive block 2 formed after curing has an expansion end part 20 embedded in the T-shaped groove 3, in the embodiment, the expansion end part 20 is a T-shaped structure, is embedded in the T-shaped groove 3, and can apply a compression force to the packaging adhesive block 2 based on the open end 31 by using the end cover 9 and/or the elastic sealing ring which is detachably sleeved on the end part of the cylinder body 1 and is positioned at the outer side of the open end 31, so that the compression force between the packaging adhesive block 2 and the groove wall surface of the T-shaped groove 3 opposite to the open end 31 is further improved, and the sealing performance is further improved.

Wherein the wall surface of the transverse groove portion of the T-shaped groove 3 adjacent to the inner wall of the end opening forms a necking-shaped groove wall surface in the present embodiment, i.e. a groove cavity with a larger groove width opposite to the opening, i.e. an expansion groove cavity, to be able to apply a stopper holding pull force to the surface of the expansion end portion 20, i.e. the expansion end portion forms the ferrule end portion in the present embodiment, which is different from the binding force of the object contact surface,

the shrinkage-shaped groove face of the sleeving groove and the stop block of the outer wall face of the expansion end part embedded in the sleeving groove are clamped and matched, so that the sealing glue block and the cylinder body are provided with the surface bonding adhesive force for resisting the shrinkage force during drying and the shearing force during cutting, and the stop force is provided to be abutted against, thereby improving the fixedly connecting performance between the bonding parts between the sealing glue block and the cylinder body, and effectively solving the problem of tearing or cracking between the sealing glue block and the cylinder body.

In addition, as shown in fig. 4, in the axial direction of the cylinder 1, the inner end surface of the packaging rubber block 2 away from the cylinder port is located at the edge of the dialysate inlet/outlet 18 and located inside the packaging groove 3, that is, the inner end surface of the packaging rubber block 2 is located on the side of the groove wall surface of the packaging groove 3 away from the end surface of the cylinder port where the packaging rubber block is installed.

As shown in fig. 3 and 5, even in the cutting process of the packaging rubber block 2, a gap 201 is formed by tearing between the groove bottom surface of the sheathing groove 3 and the packaging rubber block 2, the end cap 9 and/or the elastic sealing ring tightly presses the packaging rubber block 2, and/or the combination between the packaging rubber block and the inner wall surface of the cylinder body is not influenced by tearing, so that the sealing performance is good, blood can not enter the gap 201, namely, the blood can not be locally retained to cause coagulation, and the safety of the treatment process is ensured.

Example 2

As an explanation of embodiment 2 of the present invention, only the differences from embodiment 1 will be explained below.

Referring to fig. 6 to 10, the transverse grooves of the plurality of T-shaped grooves 3 on the cylinder 1 are sequentially connected end to form an annular integrated structure 4, that is, the open ends 31 are also sequentially connected end to form an annular structure with raised teeth inside, so that the expansion end portions 20 are formed on the package rubber block 2, that is, the annular integrated structure 20 has an annular body portion embedded in the annular integrated structure 4, and the annular integrated structure 4 is arranged along the circumferential direction of the cylinder 1, specifically, is arranged along the central axis of the cylinder 1 with a cylindrical structure.

Example 3

As an explanation of embodiment 3 of the present invention, only the differences from embodiment 1 will be explained below.

Referring to fig. 11 to 13, a plurality of dovetail grooves 3 are provided on the cylinder 1 instead of the T-shaped grooves in the previous embodiment, thereby forming the expanded end portion 20 of the inverted trapezoidal structure on the potting compound 2.

Example 4

As an explanation of embodiment 1 of the present invention, only the differences of embodiment 1 will be explained below.

Referring to fig. 14, a shoulder is formed on the inner side of the end of the barrel 1, a plurality of limit posts 19 arranged around the circumference of the shoulder are convexly arranged on the shoulder surface, and the packaging adhesive block 2 formed after the curing of the packaging adhesive has through-hole-shaped sheathing grooves 29 sheathed outside the limit posts 19. The limiting post 19 constitutes the ferrule end in this embodiment, that is, in this embodiment, the ferrule end is disposed on the barrel 1, and the sleeve groove is disposed on the packaging rubber block 2.

In the above embodiments, the sheathing groove has a notch on the side of the main body portion in the radial direction of the cylinder body and adjacent to the potting rubber block, and the notch is preferably located on the inner wall surface of the cylinder body; and a connecting part which is arranged in a manner of extending in the radial direction of the cylinder body and is embedded in the notch is arranged between the expansion end part and the main body part of the packaging rubber block. The "necking groove wall surface" is arranged in a radial direction of the cylinder, and the extending direction of the groove wall surface can block the sleeving end from moving along the radial direction.

The utility model discloses a main idea is through in the port inner wall of barrel glues the piece with the encapsulation, be equipped with the suit groove on one, another person has the inflation tip that inlays in the suit inslot based on using this suit groove to solidify as the die cavity to can utilize the throat form cell wall in this suit groove to apply at least in the barrel footpath and outside backstop card in the face of the inflation tip and hold the pulling force, in order to improve the rigid coupling performance between the bonding department between encapsulation gluey piece and barrel, the problem of tearing or fracture between the two has been solved effectively. There are many obvious variations of the configuration of the encasement slots and expansion ends in accordance with the present concepts and are not limited to the exemplary configurations of the foregoing embodiments.

Claims

1. A structure-improved blood purification hollow fiber membrane type filter comprises a cylinder body, a hollow fiber membrane bundle sleeved in the cylinder body and packaging rubber blocks used for fixing two end parts of the hollow fiber membrane bundle on the inner wall of a port of the cylinder body;

the method is characterized in that:

one of the inner wall of the port and the packaging rubber block is provided with a sleeving groove, the other one is provided with a clamping sleeve end part embedded in the sleeving groove, and the necking groove wall surface of the sleeving groove is used for applying at least stopping clamping tension force which is radially and outwards applied to the cylinder body to the clamping sleeve end part.

2. The blood purification hollow fiber membrane type filter according to claim 1, wherein:

the fitting groove has a notch on a side in the radial direction and adjacent to the main body portion of the other, and the notch-like groove wall surface is located on a side of the notch facing away from the other;

a connecting portion extending in the radial direction and passing through the notch is arranged between the ferrule end portion and the main body portion of the other ferrule.

3. The blood purification hollow fiber membrane type filter according to claim 2, wherein:

the end part of the cutting sleeve is an expansion end part;

the sleeving groove is provided with an expansion groove cavity which is matched with the end part of the clamping sleeve and is larger than the notch in size.

4. The blood purification hollow fiber membrane type filter according to claim 3, wherein:

the sleeving groove is a T-shaped groove or a dovetail groove.

5. The blood purification hollow fiber membrane type filter according to claim 4, wherein:

the T-shaped groove is arranged on the end part of the cylinder body;

the transverse groove part of the T-shaped groove is of an arc-shaped groove structure, and the arc-shaped groove structure is connected into an annular integrated structure along the circumferential direction of the barrel.

6. The blood purification hollow fiber membrane type filter according to claim 2, wherein:

the sleeve grooves are formed on the wall surfaces of the inner walls of the ports on the two end portions of the cylinder body along the radial direction in a concave mode, and the notches are located on the wall surfaces of the inner walls of the ports.

7. The blood purifying hollow fiber membrane type filter according to any one of claims 1 to 6, wherein:

the sheathing groove has open ends on both end faces of the cylinder.

8. The blood purification hollow fiber membrane type filter according to claim 7, wherein:

the sleeving groove takes the open end as a cross section and is arranged along the axial extension of the cylinder body.

9. The blood purification hollow fiber membrane type filter according to claim 7, wherein:

in the axial direction of the cylinder body, an end cover and/or an elastic sealing ring which is detachably sleeved on the end part of the cylinder body is provided with a body part which is tightly pressed on the packaging rubber block.

10. The blood purifying hollow fiber membrane type filter according to any one of claims 1 to 6, wherein:

in the axial direction of the cylinder, the inner end face of the packaging rubber block is positioned on one side of the groove wall face of the sleeving groove, which is deviated from the end face of the cylinder port where the packaging rubber block is installed.