CN219481062U

CN219481062U - Blood filter

Info

Publication number: CN219481062U
Application number: CN202223092572.6U
Authority: CN
Inventors: 张伟; 郭忱
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-08-08
Anticipated expiration: 2032-11-14

Abstract

The application relates to a blood filter relates to medical instrument's technical field, including last casing, lower casing and the well casing of connecting between last casing and lower casing, be provided with the filter screen of the upper and lower direction passageway of casing in the cover in the well casing, the upper and lower both ends of well casing are pegged graft with last casing and lower casing respectively and are connected, the cross section of filter screen is broken line shape, and four sides butt respectively on four lateral walls of well casing, the filter screen includes at least one deck supporting network layer and at least one deck filtration cloth layer, and the filtration cloth layer sets up in supporting network layer top. This application is divided into upper, middle and lower triplex with blood filter to adopt the mode of pegging graft to connect, peg graft each other during the installation, also pull out the separation easily during the dismantlement, the filter screen setting is in well casing, after the casing was dismantled, conveniently clear up or change the filter screen, make blood filter can used repeatedly.

Description

Blood filter

Technical Field

The application relates to the technical field of medical instruments, in particular to a blood filter.

Background

The blood filtration technology is to make blood flow through a filter in an extracorporeal circuit through a machine (pump) or the blood pressure of a patient, filter out a large amount of liquid and solute under the action of filtration overpressure, namely ultrafiltrate (ultra filtration), and supplement electrolyte solution with similar components to plasma liquid, namely replacement liquid (subfiltration) at the same time, so as to achieve the aim of blood purification. The whole process simulates the filtering function of glomeruli, but does not simulate the reabsorption and excretion functions of the tubular, but rather completes part of the functions of the tubular by supplementing the replacement fluid.

Hemofiltration is a process that mimics the filtration of nephrons and the reabsorption and excretion of the tubules, introducing arterial blood into a hemofilter, and water and solutes are filtered out to remove excessive water and toxins in the body. The blood side is pressurized by a blood pump and the negative pressure is added on the dialysate side to cause certain transmembrane pressure, so that the filtration rate reaches 60-90ml/min. Replacement liquid is needed to be supplemented to keep balance among water, electrolyte and acid and alkali, so that the internal environment is stable. HF mainly removes water and large, small molecular solutes by convection, and medium and large molecular solutes are better removed than hemodialysis.

The blood filter is an apparatus used in the blood filtration process, and filters blood through a filter screen in the blood filter. However, the existing blood filter is often complicated in structure, and once the filter screen of the blood filter is blocked and needs to be cleaned, the disassembly and the cleaning are very inconvenient, so that the reuse of the blood filter is affected.

Disclosure of Invention

The purpose of this application is to provide a blood filter, simple structure, and the installation is dismantled conveniently, has improved the filtration efficiency of filter screen, is favorable to repeatedly usable.

The application provides a blood filter adopts following technical scheme:

a blood filter comprises an upper shell, a lower shell and a middle shell connected between the upper shell and the lower shell, wherein a filter screen for covering a channel in the vertical direction of the middle shell is arranged in the middle shell, and the upper end and the lower end of the middle shell are respectively connected with the upper shell and the lower shell in a plugging manner.

Through adopting above-mentioned technical scheme, divide into upper, middle and lower triplex with blood filter to adopt the mode of pegging graft to connect, peg graft each other during the installation, also pull out the separation easily during the dismantlement, the filter screen setting is in well casing, after removing well casing, conveniently clear up or change the filter screen, make blood filter can reuse.

Optionally, the cross section of filter screen is broken line shape, and four side butt respectively on four lateral walls of well casing.

Through adopting above-mentioned technical scheme, the filter screen sets up to the broken line shape, can increase the area of contact with blood, and the filter area is bigger, and the filter effect is better excessively, and the structural strength of filter screen obtains the reinforcing, can bear higher blood pressure, and the filter screen is too big being difficult to warp in the pressurized, makes the filter screen can cover the casing entirely, has guaranteed the filter screen to the efficient filtration's of blood effect.

Optionally, an upper ring groove is formed in the lower end face of the upper shell, and the upper end of the middle shell is connected into the upper ring groove.

Through adopting above-mentioned technical scheme, go up casing and well casing and peg graft with the help of last annular, made things convenient for the dismouting connection between last casing and the well casing.

Optionally, the lateral wall of going up the annular or well casing lateral wall upper end is provided with the bulge loop along circumference, and upward the draw-in groove has been seted up along circumference on well casing lateral wall upper end or the lateral wall of going up the annular, goes up the bulge loop and goes up the draw-in groove cooperation and be connected.

Through adopting above-mentioned technical scheme, go up the bulge loop and go up the draw-in groove and carry out spacingly between casing and the lower casing, the degree of difficulty when can increasing last casing and well casing separation is favorable to improving holistic leakproofness and fastness when blood filter uses.

Optionally, a part of the side wall of the upper shell, which is positioned at the inner side of the upper ring groove, protrudes downwards to form an upper abutting ring, and the upper abutting ring is blocked at the upper side of the filter screen.

Through adopting above-mentioned technical scheme, go up the butt ring and can restrict the filter screen from the top, prevent that the filter screen from upwards moving or upwards overturning in the use, make the filter screen maintain in stable and the state of casing in the full coverage, guarantee the filter effect of blood filtration well ware.

Optionally, the upper end face of the lower shell is provided with a lower annular groove, and the lower end of the middle shell is connected into the lower annular groove.

Through adopting above-mentioned technical scheme, lower casing and well casing are pegged graft with the help of lower annular, have made things convenient for the dismouting connection between lower casing and the well casing.

Optionally, the lateral wall of lower annular or well casing lateral wall lower extreme are provided with down the bulge loop along circumference, and down the draw-in groove has been seted up along circumference on well casing lateral wall lower extreme or the lateral wall of lower annular, and down the bulge loop is connected with lower draw-in groove cooperation.

Through adopting above-mentioned technical scheme, adopt down bulge loop and lower draw-in groove to carry out spacingly down between lower casing and the lower casing, the degree of difficulty when can increase lower casing and well casing separation is favorable to improving holistic leakproofness and fastness when blood filter uses.

Optionally, a part of the side wall of the lower shell, which is positioned at the inner side of the lower ring groove, protrudes upwards to form a lower abutting ring, and the lower abutting ring is blocked at the lower side of the filter screen.

Through adopting above-mentioned technical scheme, lower butt ring can restrict the filter screen from the below, prevents that the filter screen from moving downwards or overturning downwards in the use, makes the filter screen maintain in stable and the state of casing in the full coverage, guarantees the filter effect of blood filtration well ware.

Optionally, the filter screen comprises at least one supporting net layer and at least one filter cloth layer, and the filter cloth layer is arranged above the supporting net layer.

Through adopting above-mentioned technical scheme, the supporting network layer can play the supporting role to the filtering cloth layer, makes the filter screen can have higher structural strength and compressive capacity.

Optionally, the top of the upper shell is provided with an inlet pipe joint, and the bottom of the lower shell is provided with an outlet pipe joint.

By adopting the technical scheme, the inlet pipe joint and the outlet pipe joint facilitate the connection of the blood filter and other pipeline structures.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the blood filter is divided into an upper part, a middle part and a lower part, the blood filter is connected in an inserting mode, the blood filter is inserted mutually during installation, the blood filter is easy to pull out and separate during disassembly, the filter screen is arranged in the middle shell, and after the middle shell is disassembled, the filter screen is convenient to clean or replace, so that the blood filter can be reused.

2. The filter screen sets up to the dog-ear shape, can increase the area of contact with blood, and the filter area is bigger, and the filter effect is better excessively, and the structural strength of filter screen obtains the reinforcing, can bear higher blood pressure, and the filter screen is pressed too big be difficult to warp, makes the filter screen can cover the well casing entirely, has guaranteed the filter screen to the efficient filtration's of blood effect.

3. The filter screen includes supporting network layer and filtration cloth layer, and the supporting network layer can play the supporting role to filtration cloth layer, makes the filter screen can have higher structural strength and compressive capacity.

Drawings

FIG. 1 is a schematic cross-sectional view of embodiment 1 of the present application;

FIG. 2 is a schematic cross-sectional view of another perspective of embodiment 1 of the present application;

FIG. 3 is a schematic cross-sectional view of a filter screen in embodiment 1 of the present application;

FIG. 4 is a schematic cross-sectional view of embodiment 2 of the present application;

in the figure, 1, an upper shell; 11. an upper ring groove; 12. upper abutment ring: 13. a pipe inlet joint; 2. a lower housing; 21. a lower ring groove; 22. a lower abutment ring; 23. a pipe joint; 3. a middle shell; 4. a filter screen; 41. a support mesh layer; 42. a filter cloth layer; 51. an upper convex ring; 52. an upper clamping groove; 53. a lower convex ring; 54. and a lower clamping groove.

Detailed Description

The present application is described in further detail below with reference to fig. 1-4.

Example 1: referring to fig. 1 and 2, the device includes structure such as last casing 1, lower casing 2, well casing 3 and filter screen 4, well casing 3 can dismantle the connection between last casing 1 and lower casing 2 to form a filtration storehouse, be provided with filter screen 4 in the filtration storehouse, filter screen 4 connects in well casing 3, covers the passageway of well casing 3 upper and lower direction entirely, makes blood flow downwards through filter screen 4, and blood filter falls into upper and lower triplex casing, and the material is polypropylene material, and adopts the mode of pegging graft to connect, easy dismounting, clear up or change also convenient and fast more to filter screen 4.

Referring to fig. 1 and 2, in this embodiment, the upper casing 1 is funnel-shaped with its opening facing downward, and has a large opening at its lower end for connection with the middle casing 3, and a small opening at its upper end, and is connected with an inlet connector 13 for connection with a blood transfusion tube. The lower opening of the upper shell 1 is rectangular, a circular groove 11 is formed in the lower end face, the upper width and the lower width of the upper groove 11 are the same, the middle shell 3 is of a rectangular cylinder structure, the thickness of the shell is the same as the width of the upper groove 11, and the upper end of the shell is inserted into the upper groove 11, so that the plug-in connection of the upper shell 1 and the middle shell 3 is realized. The part of the side wall of the upper shell 1, which is positioned at the inner side of the upper ring groove 11, protrudes downwards to form an upper abutting ring 12, the upper abutting ring 12 is blocked at the upper side of the filter screen 4, the filter screen 4 is limited from the upper side, the filter screen 4 moves upwards or overturns upwards in the using process, and can not move upwards due to the blocking of the upper abutting ring 12, so that the filter screen 4 is maintained in a stable and full-coverage state of the middle shell 3.

In this embodiment, the lower casing 2 is provided in a funnel shape with an upward opening, and has a larger upper end opening for connection with the middle casing 3, and a smaller lower end opening for connection with a tube connector 23 for connection with a blood transfusion tube. The upper opening of the lower shell 2 is rectangular, a circle of lower annular groove 21 is formed in the upper end face, the upper width and the lower width of the lower annular groove 21 are the same, and the lower end of the middle shell 3 is inserted into the lower annular groove 21, so that the plug connection of the lower shell 2 and the middle shell 3 is realized. The part of the side wall of the lower shell 2, which is positioned at the inner side of the lower ring groove 21, protrudes downwards to form a lower abutting ring 22, the lower abutting ring 22 is blocked at the lower side of the filter screen 4, the filter screen 4 is limited from the lower side, the filter screen 4 moves downwards or overturns downwards in the use process, and can not move downwards due to the blocking of the lower abutting ring 22, so that the filter screen 4 is maintained in a stable and full-coverage state of the middle shell 3.

Referring to fig. 1 and 3, the filter screen 4 is integrally rectangular in structure, the cross section is in a folded line shape, four side edges are respectively abutted on four side walls of the middle shell 3, the filter screen 4 is required to be extruded towards the middle along the folded line direction during installation and put into the middle shell 3, and the filter screen 4 can be subjected to the pressure exerted by the middle shell 3, so that the filter screen 4 is not easy to separate from the middle shell 3.

Referring to fig. 3, the filter screen 4 is a multi-layer structure, and includes at least one supporting mesh layer 41 and at least one filter cloth layer 42, in this embodiment, two supporting mesh layers 41 and one filter cloth layer 42 are disposed together, the two supporting mesh layers 41 are disposed above and below the filter cloth layer respectively, the filter cloth layer 42 is sandwiched between the two supporting mesh layers, and the filter cloth layer 42 is embedded and is not connected with the supporting mesh layer 41. The supporting net layer 41 has larger aperture, the material is selected from medical polypropylene, nylon, stainless steel, PET or PP materials, the filter cloth layer 42 has smaller aperture, and the material is selected from medical polypropylene, PET or medical cationic filter cloth.

Example 2: referring to fig. 4, this embodiment is different from embodiment 1 in that a limit structure is added to the connection portion in order to enhance the connection firmness between the middle housing 3 and the upper housing 1 and the lower housing 2 in this embodiment.

An upper convex ring 51 is circumferentially arranged on the side wall of the upper annular groove 11 or the upper end of the side wall of the middle shell 3, an upper clamping groove 52 is circumferentially arranged on the upper end of the side wall of the middle shell 3 or the side wall of the upper annular groove 11, and the upper convex ring 51 is matched and clamped with the upper clamping groove 52. In this embodiment, the upper convex ring 51 is disposed on the upper side of the outer wall of the middle housing 3, the upper clamping groove 52 is formed on the outer side wall of the upper annular groove 11, when the upper housing 1 and the middle housing 3 are inserted, the upper housing 1 and the upper convex ring 51 are extruded, and a certain deformation amount exists, so that the middle housing 3 can be inserted into the upper annular groove 11 until the middle housing 3 abuts against the bottom of the upper annular groove 11, the upper convex ring 51 is clamped in the upper clamping groove 52, and the upper housing 1 and the upper convex ring 51 are extruded during disassembly.

A lower convex ring 53 is circumferentially arranged on the side wall of the lower annular groove 21 or at the lower end of the side wall of the middle shell 3, a lower clamping groove 54 is circumferentially arranged on the lower end of the side wall of the middle shell 3 or on the side wall of the lower annular groove 21, and the lower convex ring 53 is matched and clamped with the lower clamping groove 54. In this embodiment, the lower convex ring 53 is disposed on the upper side of the outer wall of the middle housing 3, the lower clamping groove 54 is formed on the outer side wall of the lower annular groove 21, when the lower housing 2 and the middle housing 3 are inserted, the lower housing 2 and the lower convex ring 53 are extruded, and a certain deformation amount exists, so that the middle housing 3 can be inserted into the lower annular groove 21 until the middle housing 3 abuts against the bottom of the lower annular groove 21, the lower convex ring 53 is clamped in the lower clamping groove 54, and the lower housing 2 and the lower convex ring 53 are extruded during disassembly.

The embodiments of this embodiment are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, in which like parts are denoted by like reference numerals. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a blood filter, its characterized in that includes last casing (1), lower casing (2) and connects well casing (3) between last casing (1) and lower casing (2), is provided with in well casing (3) and covers filter screen (4) of well casing (3) upper and lower direction passageway, and the upper and lower both ends of well casing (3) are pegged graft with last casing (1) and lower casing (2) respectively and are connected.

2. A blood filter according to claim 1, wherein the cross section of the filter screen (4) is in the shape of a fold line, and the four sides are respectively abutted against the four side walls of the middle housing (3).

3. A blood filter according to claim 2, wherein the lower end face of the upper housing (1) is provided with an upper ring groove (11), and the upper end of the middle housing (3) is connected to the upper ring groove (11).

4. A blood filter according to claim 3, wherein an upper convex ring (51) is circumferentially arranged on the side wall of the upper ring groove (11) or on the upper end of the side wall of the middle shell (3), an upper clamping groove (52) is circumferentially arranged on the upper end of the side wall of the middle shell (3) or on the side wall of the upper ring groove (11), and the upper convex ring (51) is in fit connection with the upper clamping groove (52).

5. A blood filter according to claim 3, wherein the side wall of the upper housing (1) is provided with an upper abutment ring (12) at a portion located inside the upper ring groove (11), the upper abutment ring (12) being caught on the upper side of the filter screen (4).

6. A blood filter according to claim 2, wherein the upper end surface of the lower housing (2) is provided with a lower ring groove (21), and the lower end of the middle housing (3) is connected to the lower ring groove (21).

7. A blood filter according to claim 6, wherein a lower convex ring (53) is circumferentially arranged on the side wall of the lower ring groove (21) or at the lower end of the side wall of the middle shell (3), a lower clamping groove (54) is circumferentially arranged on the lower end of the side wall of the middle shell (3) or on the side wall of the lower ring groove (21), and the lower convex ring (53) is in fit connection with the lower clamping groove (54).

8. A blood filter according to claim 6, wherein the side wall of the lower housing (2) is provided with a lower abutment ring (22) protruding upwards from the inner side of the lower ring groove (21), the lower abutment ring (22) being blocked against the underside of the filter screen (4).

9. A blood filter according to claim 2, wherein the filter screen (4) comprises at least one support screen layer (41) and at least one filter cloth layer (42), the filter cloth layer (42) being arranged above the support screen layer (41).

10. A blood filter according to claim 1, wherein the top of the upper housing (1) is provided with an inlet fitting (13) and the bottom of the lower housing (2) is provided with an outlet fitting (23).