Disposable cellulose gel microsphere blood perfusion device

Abstract

The utility model relates to a disposable cellulose gel microsphere hemoperfusion device which comprises a middle cylinder, two ends of the middle cylinder are completely opened and are fixed by ultrasonic welding, a gland for completely sealing two ends of the middle cylinder is arranged, a shaft hole is formed in the center of the gland, tightening threads are arranged in the shaft hole, and a double-wing cap is screwed in the shaft hole. A sealing ring is arranged at the end, facing the middle cylinder, of the double-wing cap, a frame type net is fixedly installed on the side, close to the middle cylinder, of the gland, the frame type net, the gland and the middle cylinder are welded and fixed, a connector integrally formed with the middle cylinder is arranged in the middle of the outer side of the middle cylinder, the connector is communicated with the interior of the middle cylinder, a sealing plug is inserted into the connector, and a protrusion is arranged on the outer side of the connector. A sealing plug protection cover is arranged on the connector in a clamped mode, the sealing plug protection cover is used for pressing the sealing plug into the connector, the connector which is formed in the middle of the outer side of the middle cylinder and integrally formed with the middle cylinder can enable materials to be better filled into the middle cylinder, and efficient filling is achieved.

Description

Technical Field

[0001] This utility model relates to the field of hemodialysis technology, and in particular to a disposable cellulose gel microsphere hemoperfusion device. Background Technology

[0002] Hemoperfusion is a treatment technique that uses extracorporeal circulation to remove endogenous or exogenous toxins and pathogens from a patient's blood through a hemoperfusion device with a special adsorption function, thereby achieving blood purification. It is currently a very effective blood purification treatment in clinical practice. Existing hemoperfusion devices only have fastening threads on the outer walls of both ends of the inner cylinder to mate with the pressure cap, or limit lugs or check buckles for positioning with the pressure cap. The pressure cap and the inner cylinder are sealed only by an elastic sealing ring. A drawback of this existing technology is that during clinical pre-filling or use, the increased pressure inside the hemoperfusion device can cause the elastic sealing ring to break down, resulting in leakage of pre-filling fluid or blood along the threads.

[0003] Currently, Chinese patent CN110448750B discloses a blood perfusion device, comprising a middle cylinder filled with adsorbent resin, two blood nozzles, two filters, and two caps. The two blood nozzles are sealed to both ends of the middle cylinder via threaded connections, and filters are respectively provided between the two end faces of the middle cylinder and the two blood nozzles. The two caps are respectively sealed to the channel ports included by the two blood nozzles via threaded connections. Each of the two caps is provided with a locking component for locking and preventing detachment of its corresponding cap. This invention can improve the sealing effect of the blood perfusion device, thus avoiding leakage during clinical pre-flushing and reducing the pre-flushing workload of medical institutions. In addition, the locking components in this embodiment of the invention can prevent the caps from loosening, thereby effectively ensuring the seal between the caps and the blood nozzles.

[0004] The above-mentioned existing technical solutions have the following drawbacks: However, the material of the blood perfusion device in the existing technology needs to be filled into the middle cylinder through the two pressure cap openings, which is very troublesome and inefficient. Utility Model Content

[0005] The purpose of this invention is to provide a disposable cellulose gel microsphere hemoperfusion device to solve the problems existing in the prior art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A disposable cellulose gel microsphere hemoperfusion device includes a middle cylinder, both ends of which are fully open. Each end of the middle cylinder is welded and fixed with a pressure cap for completely sealing both ends. A central shaft hole is provided in the pressure cap, and a tightening thread is provided inside the shaft hole. A double-winged cap is screwed into the shaft hole. A sealing ring is provided at the end of the double-winged cap facing the middle cylinder. An extension end located outside the shaft hole is provided at the end of the double-winged cap away from the middle cylinder. Force-applying parts integrally formed with the double-winged cap are uniformly arranged axially on the extension end. A frame mesh is fixedly installed on the side of the pressure cap near the middle cylinder. The frame mesh is welded and fixed to the pressure cap and the middle cylinder. An interface integrally formed with the middle cylinder is provided at the middle position of the outer side of the middle cylinder. The interface communicates with the interior of the middle cylinder. A sealing plug is inserted into the interface. A protrusion is provided on the outer side of the interface. A sealing plug protective cover is snapped onto the interface, and the sealing plug protective cover is used to press the sealing plug into the interior of the interface.

[0008] By adopting the above technical solution, the interface integrally formed with the middle of the outer side of the middle cylinder can allow the material to be better filled into the middle cylinder, thus achieving efficient filling.

[0009] In a further embodiment, the frame mesh is composed of a support structure and a filter screen welded and fixed together. The support structure is integrally formed by an outer retaining ring, an inner positioning ring, and a plurality of axially uniformly arranged connecting ribs. One end of the plurality of connecting ribs is connected to the inner positioning ring, and the other end of the plurality of connecting ribs is fixedly connected to the outer retaining ring. The filter screen is welded and fixed to the outer retaining ring.

[0010] By adopting the above technical solutions, the structural strength of the frame mesh can be better enhanced, and the frame mesh and the cover can be prevented from being too closely fitted.

[0011] In a further embodiment, the middle cylinder is made of PP, the frame mesh is made of TPE, the cap is made of PP, and the sealing plug is made of silicone.

[0012] In a further embodiment, the axial hole of the gland is provided with a groove for engaging the sealing ring.

[0013] In a further embodiment, the cross-section of each of the connecting ribs is set to be rectangular, and the support structure is used to ensure that there is a gap between the filter screen and the pressure cap on the side facing the pressure cap.

[0014] In a further embodiment, the surface of the sealing plug is configured as a multi-layered frustum-cone structure.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1. The interface integrally formed with the middle cylinder and located at the outer center of the middle cylinder allows materials to be better filled into the middle cylinder, achieving efficient filling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the frame mesh structure of this utility model.

[0019] In the diagram, 1 is the middle cylinder; 2 is the pressure cap; 3 is the double-wing cap; 4 is the frame mesh; 41 is the support structure; 42 is the filter screen; and 5 is the sealing plug protective cover. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0022] Example 1:

[0023] like Figure 1-Figure 2As shown, a disposable cellulose gel microsphere hemoperfusion device includes a middle cylinder 1, both ends of which are fully open. A pressure cap 2 for completely sealing both ends of the middle cylinder 1 is welded and fixed to both ends of the middle cylinder 1. A shaft hole is provided in the center of the pressure cap 2, and a tightening thread is provided inside the shaft hole. A double-wing cap 3 is screwed into the shaft hole. A sealing ring is provided at the end of the double-wing cap 3 facing the middle cylinder 1, and an extension end located outside the shaft hole is provided at the end of the double-wing cap 3 away from the middle cylinder 1. A force-applying part integrally formed with the double-wing cap 3 is axially evenly arranged on the extension end. A frame mesh 4 is fixedly installed on the side of the pressure cap 2 near the middle cylinder 1. The frame mesh 4 is welded and fixed to the pressure cap 2 and the middle cylinder 1. The frame mesh 4 is composed of a support structure 41 and a filter screen 42 welded and fixed. The support structure 41 is integrally formed by an outer retaining ring, an inner positioning ring, and multiple axially evenly arranged connecting ribs. One end of each connecting rib is connected to the inner positioning ring. The other end of the connecting rib is fixedly connected to the outer retaining ring. The filter screen 42 is welded and fixed to the outer retaining ring. An interface integrally formed with the middle cylinder 1 is provided at the middle position of the outer side of the middle cylinder 1. The interface is connected to the inside of the middle cylinder 1. A sealing plug is inserted into the interface. A protrusion is provided on the outer side of the interface. A sealing plug protective cover 5 is snapped onto the interface. The sealing plug protective cover 5 is used to press the sealing plug into the inside of the interface. The material of the middle cylinder 1 is PP. The material of the frame mesh 4 is TPE. The material of the pressure cap 2 is PP. The sealing plug is made of silicone. A slot for snapping the sealing ring is provided in the shaft hole of the pressure cap 2. The cross section of each connecting rib is set as a rectangle. The support structure 41 is used to make the filter screen 42 and the side of the pressure cap 2 facing the pressure cap 2 have a gap. The surface of the sealing plug is set as a multi-layer truncated cone structure. A support protrusion for support is provided at the end of the pressure cap 2 and the frame mesh 4 that are close to each other.

[0024] Specific implementation process: The interface integrally formed with the middle of the outer side of the middle cylinder allows the material to be better filled into the middle cylinder, achieving a highly efficient filling effect.

[0025] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0026] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A disposable cellulose gel microsphere hemoperfusion device, characterized in that: Includes a middle cylinder (1), both ends of which are fully open. Both ends of the middle cylinder (1) are welded and fixed with pressure caps (2) for completely sealing both ends of the middle cylinder (1). The pressure caps (2) have a shaft hole in the center, and the shaft hole has a tightening thread inside. A double-wing cap (3) is screwed into the shaft hole. A sealing ring is provided at the end of the double-wing cap (3) facing the middle cylinder (1). An extension end located outside the shaft hole is provided at the end of the double-wing cap (3) away from the middle cylinder (1). The extension end has axially uniformly arranged threads that are aligned with the double-wing cap (3). The pressure cap (2) is fixedly installed with a frame mesh (4) on the side near the middle cylinder (1). The frame mesh (4) is welded and fixed to the pressure cap (2) and the middle cylinder (1). An interface integrally formed with the middle cylinder (1) is provided at the middle position of the outer side of the middle cylinder (1). The interface is connected to the inside of the middle cylinder (1). A sealing plug is inserted into the interface. A protrusion is provided on the outer side of the interface. A sealing plug protective cover (5) is snapped onto the interface. The sealing plug protective cover (5) is used to press the sealing plug into the inside of the interface.

2. The disposable cellulose gel microsphere hemoperfusion device according to claim 1, characterized in that: The frame mesh (4) is composed of a support structure (41) and a filter screen (42) injection molded and fixed. The support structure (41) is integrally formed by an outer retaining ring, an inner positioning ring and a plurality of connecting ribs evenly arranged axially. One end of the plurality of connecting ribs is connected to the inner positioning ring, and the other end of the plurality of connecting ribs is fixedly connected to the outer retaining ring. The filter screen (42) is welded and fixed on the outer retaining ring.

3. The disposable cellulose gel microsphere hemoperfusion device according to claim 1, characterized in that: The material of the middle cylinder (1) is PP, the material of the frame mesh (4) is TPE, the material of the pressure cap (2) is PP, and the material of the sealing plug is silicone.

4. The disposable cellulose gel microsphere hemoperfusion device according to claim 1, characterized in that: The pressure cap (2) has a groove in the shaft hole for engaging the sealing ring.

5. A disposable cellulose gel microsphere hemoperfusion device according to claim 2, characterized in that: Each of the connecting ribs has a rectangular cross section, and the support structure (41) is used to ensure that there is a gap between the filter screen (42) and the pressure cap (2) on the side facing the pressure cap (2).

6. The disposable cellulose gel microsphere hemoperfusion device according to claim 1, characterized in that: The surface of the sealing plug is configured as a multi-layered frustum-cone structure.

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