Blood filtering device for blood purification renal dialysis

Abstract

The utility model relates to the technical field of hemodialysis, in particular to a blood filtering device for blood purification and renal dialysis, which comprises an outer tube detachably connected to a support, an inner tube coaxially arranged on the inner side of the outer tube and a filtering structure arranged on the inner side of the inner tube. The two ends of the inner tube are respectively provided with a second connecting part which is located on the inner side of the first connecting part and can be communicated with the external tube head, and the inner side of the first connecting part is provided with a sealing structure which is used for sealing the second connecting part and can be opened by the external tube head. And in the process of releasing pipelines at the two ends of the blood filtering device, the problem that blood drips from the blood filtering device is solved.

Description

Technical Field

[0001] The present application relates to the technical field of hemodialysis, and specifically discloses a blood filtration device for blood purification and renal dialysis. Background Art

[0002] Renal dialysis, also known as an artificial kidney or hemodialysis machine, is a type of blood purification technology. It utilizes a semipermeable membrane to remove harmful and excess metabolic waste and electrolytes from the body through diffusion and convection, thereby purifying the blood and correcting electrolyte and acid-base balance. Blood filtration is primarily accomplished within the hemofiltration device.

[0003] In the prior art, blood filtration devices used in blood purification renal dialysis equipment often perform osmotic filtration through an internal filter screen, and most of them are configured as a double-layer structure with a heat preservation function. The filter screen is set in the inner liner, and unfiltered blood enters from the liquid inlet of the filtration device, is filtered through the filter screen, and is discharged from the liquid outlet. The filtered substances remain on the filter screen.

[0004] After a single hemodialysis session, the blood purification renal dialysis equipment needs to be maintained, which involves the replacement and maintenance of the blood filter device. In the prior art, a single blood purification renal dialysis equipment is usually equipped with multiple blood filter devices to filter blood simultaneously. The blood filter devices are usually mounted on a support in a unified manner by snap-fitting, and the liquid inlet and outlet at both ends are connected to external pipes through hard pipe heads to achieve blood circulation. However, when the blood filter device is removed, the filtered substances will remain on the filter screen, which will hinder the flow of blood. In addition, during each hemodialysis session, the blood subsequently drawn cannot flow back into the human body completely, and some of it will remain in the hemodialysis device. When the blood filter device is removed, the pipes connected at both ends need to be released. At this time, the blood retained in the blood filter device will flow out, and there will be dripping, which will pollute the environment inside the medical room.

[0005] Therefore, in view of this, the inventor provides a blood filtration device for blood purification renal dialysis to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to solve the problem that blood may drip from the blood filter device during the release of the pipes at both ends of the blood filter device during the replacement and maintenance of the traditional blood purification kidney dialysis equipment.

[0007] In order to achieve the above-mentioned purpose, the basic scheme of the present utility model provides a blood filtration device for blood purification renal dialysis, including an outer tube detachably connected to a support, an inner tube coaxially arranged on the inner side of the outer tube, and a filtering structure arranged on the inner side of the inner tube. The two ends of the outer tube are respectively provided with a first connecting part for the external tube head to extend into, and the two ends of the inner tube are respectively provided with a second connecting part located on the inner side of the first connecting part and connectable to the external tube head. The inner side of the first connecting part is provided with a closing structure for closing the second connecting part and can be opened by the external tube head.

[0008] Furthermore, the closed structure includes arc-shaped rubber pads respectively arranged circumferentially on the inner side of the first connecting portion, the outer walls of adjacent arc-shaped rubber pads are in contact with each other, and the arc-shaped rubber pads all intersect at the axis of the outer tube.

[0009] Furthermore, the outer end surface of the intersection of the arc-shaped rubber pads is concave inward to form an inner concave surface that facilitates the opening of the external pipe head.

[0010] Furthermore, the closed structure also includes a butt ring that can butt against the outer end of the first connecting part, the arc-shaped rubber pad is circumferentially fixed to the inner side of the butt ring, and the outer wall of the arc-shaped rubber pad is slidably connected to the inner wall of the first connecting part.

[0011] Furthermore, an annular spacer for isolating the end of the second connecting portion from the arc-shaped rubber pad is fixedly connected to the inner side of the first connecting portion.

[0012] Furthermore, a plurality of main isolation plates which can be respectively placed between adjacent arc-shaped rubber pads are fixedly connected to the end surface of the annular partition.

[0013] Furthermore, it also includes an auxiliary fastening structure that can be synchronously brought into the space between the arc-shaped rubber pads by the external pipe head.

[0014] Furthermore, the auxiliary fastening structure includes a collar that can be sleeved on the outside of the external pipe head and auxiliary isolation plates that are circumferentially fixed to the outside of the collar and can be respectively placed between adjacent arc-shaped rubber pads.

[0015] The principle and effect of this solution are:

[0016] 1. Compared with the prior art, the present invention has external tube heads installed at both ends of the outer tube, which are inserted into the inner sides of the two ends of the outer tube and communicate with the inner tube, allowing blood to flow through the inner tube. The filtering structure in the inner tube realizes the filtering function of the blood. At the same time, the double-layer design also has the effect of keeping the blood warm.

[0017] 2. Compared with the prior art, the utility model connects the first connecting part of the outer tube to the external tube head. At the same time, a closing structure is provided on the inner side of the first connecting part to clamp the external tube head inside the first connecting part. Moreover, after the external tube head is pulled out, the contracted and closed closing structure will close the second connecting parts at both ends of the inner tube, so that the internal blood cannot flow out. This solves the problem of blood dripping from the blood filter device during the release of the pipes at both ends of the blood filter device during the replacement and maintenance of traditional blood purification renal dialysis equipment.

[0018] 3. Compared with the prior art, the present invention installs the arc-shaped rubber pad in a sliding connection manner, and fixes the position of the arc-shaped rubber pad with a ring after sliding the arc-shaped rubber pad to the inner side of the first connecting part. At the same time, the inserted external pipe head will also press the arc-shaped rubber pad tightly against the first connecting part, and at the same time, the first connecting part will also clamp the external pipe head.

[0019] 4. Compared with the prior art, the present invention is also equipped with an annular spacer, which not only forms an isolation zone between the arc-shaped rubber pad and the end of the second connecting part, but also limits the deformation of the arc-shaped rubber pad to both sides through the main isolation plate provided on the end face of the annular spacer, thereby further squeezing and fixing the external pipe head when the external pipe head is inserted. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram showing the internal structure of a blood filtration device for blood purification and renal dialysis proposed in an embodiment of the present application is shown;

[0022] Figure 2 A partial schematic diagram of a blood filtration device for blood purification and renal dialysis proposed in an embodiment of the present application is shown;

[0023] Figure 3 A partial schematic diagram of a blood filtration device for blood purification and renal dialysis proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0024] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0025] The reference numerals in the drawings of the specification include: outer tube 1, inner tube 2, first filter layer 3, mounting ring 4, second connecting part 5, main isolation plate 6, arc-shaped rubber pad 7, first connecting part 8, external pipe head 9, auxiliary isolation plate 10, annular partition 11.

[0026] A blood filtration device for blood purification renal dialysis, implementing for example Figure 1 As shown:

[0027] The filter comprises an outer tube 1, an inner tube 2 coaxially mounted on the inner side of the outer tube 1, and a filter structure mounted on the inner side of the inner tube 2. The outer tube 1 has first connecting portions 8 integrally formed at both ends for an external pipe head 9 to extend into. The inner tube 2 has second connecting portions 5 integrally formed at both ends, located inside the first connecting portions 8 and communicating with the external pipe head 9. A sealing structure is also mounted inside the first connecting portions 8 for sealing the second pipe head and can be opened by the external pipe head 9.

[0028] An annular connecting platform is integrally formed on the inner side of both ends of the outer tube 1, and both ends of the second connecting part 5 are fixedly installed on the inner side of the annular connecting platform. A gap is left between the outer tube 1 and the inner tube 2 between the annular connecting platforms at both ends, and the gap is in a vacuum state to achieve heat preservation of the blood circulating in the inner tube 2.

[0029] A mounting ring 4 is integrally formed on the outer wall of the first connecting portion 8 at both ends of the outer tube 1. A placement groove and a clamping groove connected to the placement groove are respectively opened on both sides of the mounting ring 4. In this embodiment, a clamping key that can be extended into the placement groove and clamped into the clamping groove is installed on the clamping seat for mounting the outer tube 1.

[0030] like Figure 1 As shown, the top end of the outer tube 1 is the liquid inlet, the bottom end of the outer tube 1 is the liquid outlet, and the inner diameter of the inner tube 2 gradually decreases from top to bottom. The filtering structure includes a first filter layer 3, a second filter layer, and a third filter layer, which are installed on the inner side of the inner tube 2 from top to bottom. The gaps between the first filter layer 3, the second filter layer, and the third filter layer also gradually decrease. Furthermore, the inner wall of the inner tube 2 is integrally formed with a first annular groove, a second annular groove, and a third annular groove for accommodating and respectively extending the outer walls of the first filter layer 3, the second filter layer, and the third filter layer.

[0031] The closure structure comprises a collar and four curved rubber pads 7 circumferentially fixedly mounted on its inner side. The outer walls of adjacent curved rubber pads 7 fit together, and all four converge at the axis of the outer tube 1. At this intersection, the four curved rubber pads 7 are recessed inward toward the outside, forming a concave surface that facilitates the opening of the external tube head 9. During installation, the four curved rubber pads 7 slide into the inner side of the first connecting portion 8, where they are pressed against the inner wall of the first connecting portion 8 to converge, with the inner wall of the collar abutting against the outer end of the first connecting portion 8.

[0032] like Figure 2 and Figure 3 As shown, an annular spacer 11 is fixedly mounted on the inner side of the first connecting portion 8 below the curved rubber pad 7. This spacer is used to isolate the end of the second connecting portion 5 from the bottom end of the curved rubber pad 7. The inner diameter of the annular spacer 11 is equal to that of the second connecting portion 5. Four main isolation plates 6 are also fixedly mounted circumferentially on the upper end surface of the annular spacer 11, which can be respectively inserted between adjacent curved rubber pads 7.

[0033] In this embodiment, an auxiliary fastening structure that can be placed inside the first connecting part 8 is also installed. The auxiliary fastening structure is placed in the first connecting part 8 at the same time as the external tube head 9. When the external tube head 9 is pulled out, the auxiliary fastening structure needs to be pulled out in advance.

[0034] The auxiliary fastening structure includes a collar that can be sleeved on the outside of the external pipe head 9 and a secondary isolation plate 10 that is circumferentially fixed on the outside of the collar and can be respectively placed between adjacent arc-shaped rubber pads 7. The main isolation plate 6 can be abutted against the secondary isolation plate 10.

[0035] When the utility model is used, the outer tube 1 is installed on the support by the mounting ring 4 and fixed by the clamping relationship between the clamping key and the clamping groove. After being fixed, the external tube heads 9 at both ends are connected. When the external tube heads 9 are placed, the auxiliary fastening structure needs to be synchronously inserted into the arc-shaped rubber pad 7 of the first connecting part 8. The arc-shaped rubber pad 7 is used to seal and clamp the external tube head 9, so that the inner tube 2 is connected with the external tube heads 9 at both ends without any gaps. Blood flows from the liquid inlet and is filtered step by step through the first filter layer 3, the second filter layer and the third filter layer to obtain blood with the required indicators.

[0036] After a dialysis is completed, during maintenance and replacement, first pull out the auxiliary fastening structures at both ends respectively, and then pull out the external tube heads 9 at both ends in turn. When the external tube heads 9 are pulled out, the mesh tube heads can be sealed with cotton gauze or placed in other containers. When pulled out, the first connection parts 8 at both ends of the outer tube 1 are closed, and the outer tube 1 can be sealed to prevent the residual liquid and blood inside it from being discharged. At the same time, when processing the outer tube 1 and the inner tube 2, the arc-shaped rubber pad 7 can be pulled out by peeling off the ring outward to expose the inner tube 2.

[0037] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A blood filtration device for blood purification and renal dialysis, comprising an outer tube detachably connected to a support, an inner tube coaxially disposed inside the outer tube, and a filtering structure disposed inside the inner tube, characterized in that: The outer tube is provided with a first connection part at both ends for the external tube head to extend into, and the inner tube is provided with a second connection part at both ends located on the inner side of the first connection part and connected to the external tube head. The first connection part is provided with a closing structure on the inner side for closing the second connection part and can be opened by the external tube head.

2. A blood filtration device for blood purification and renal dialysis according to claim 1, characterized in that: The closed structure includes arc-shaped rubber pads respectively arranged circumferentially on the inner side of the first connecting portion, the outer walls of adjacent arc-shaped rubber pads are fitted together, and the arc-shaped rubber pads all intersect at the axis of the outer tube.

3. A blood filtration device for blood purification and renal dialysis according to claim 2, characterized in that: The outer end surface of the intersection of the arc-shaped rubber pads is concave inward to form an inner concave surface for facilitating the opening of the outer pipe head.

4. A blood filtration device for blood purification and renal dialysis according to claim 2, characterized in that: The closed structure further includes a butt ring that can butt against the outer end of the first connecting portion. The arc-shaped rubber pad is circumferentially fixed to the inner side of the butt ring, and the outer wall of the arc-shaped rubber pad is slidably connected to the inner wall of the first connecting portion.

5. A blood filtration device for blood purification and renal dialysis according to claim 2, characterized in that: An annular spacer for isolating the end of the second connecting portion from the arc-shaped rubber pad is fixedly connected to the inner side of the first connecting portion.

6. A blood filtration device for blood purification and renal dialysis according to claim 5, characterized in that: The end surface of the annular partition is fixedly connected with a plurality of main isolation plates which can be respectively placed between adjacent arc-shaped rubber pads.

7. A blood filtration device for blood purification and renal dialysis according to claim 3, characterized in that: It also includes an auxiliary fastening structure that can be synchronously brought into the space between the arc-shaped rubber pads by the external pipe head.

8. A blood filtration device for blood purification and renal dialysis according to claim 7, characterized in that: The auxiliary fastening structure comprises a collar which can be sleeved on the outside of the external pipe head and a secondary isolation plate which is circumferentially fixed to the outside of the collar and can be respectively placed between adjacent arc-shaped rubber pads.

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