Dialysis bag sealing clamp

Abstract

The utility model discloses a dialysis bag sealing clip, which comprises a fixing ring and a sealing plug, the sealing plug comprises a handle, a rod part and a plug head, the handle and the plug head are respectively connected at two ends of the rod part, a radial threaded through hole is arranged on the side wall of the fixing ring, threads are arranged on the outer surface of the rod part, the rod part is arranged in the threaded through hole of the fixing ring in a penetrating manner, and the plug head is positioned in the fixing ring. The handle is located outside the fixing ring, and the gap between the plug head and the inner wall of the fixing ring is adjusted by rotating the sealing plug. The dialysis bag sealing clip disclosed by the utility model is small in size, can be used in small glass containers such as a glass centrifugal tube, is convenient to detach due to the connection mode, is simple and quick, and is high in practicability.

Description

Technical Field

[0001] The utility model relates to the field of medical experimental auxiliary instruments, in particular to a dialysis bag sealing clip. Background Art

[0002] A dialysis bag is a tubular container made of a semipermeable membrane. When in use, the sample is placed in the dialysis bag, which is sealed at both ends and immersed in the corresponding solution. According to the principle of selective permeability of the semipermeable membrane, small molecules in the sample can freely pass through the semipermeable membrane into and out of the solution, while large molecules are retained in the dialysis bag, thereby achieving separation, purification or concentration of the sample. This is a commonly used technology in laboratories.

[0003] When in use, the dialysis bag opening is usually sealed with a rubber band or string, or clamped with a special dialysis bag clamp. However, rubber bands and strings are prone to not being tightened enough, resulting in leakage of macromolecular substances, and it is not convenient to disassemble and clean the dialysis bag. Although the dialysis bag clamps currently on the market are easy to disassemble and are designed with protrusions and grooves to ensure sealing, they are all long horizontal clamps, which are suitable for placing the dialysis bag in a large beaker when the volume of the dialysis solution is large. For the case where the volume of the dialysis solution is small and the dialysis bag is placed in a glass centrifuge tube, there is no suitable sealing device. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a dialysis bag sealing clamp, which improves the existing dialysis bag sealing clamp so that it can be used in small glass containers such as glass centrifuge tubes, and can be easily disassembled to facilitate repeated use of the dialysis bag after cleaning.

[0005] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0006] A dialysis bag sealing clamp comprises a fixing ring and a sealing plug, wherein the sealing plug comprises a handle, a rod and a plug head, wherein the handle and the plug head are respectively connected to two ends of the rod head, a radial threaded through hole is arranged on the side wall of the fixing ring, a thread is arranged on the outer surface of the rod head, the rod part is inserted into the threaded through hole of the fixing ring, the plug head is located in the fixing ring, and the handle is located outside the fixing ring, and the gap between the plug head and the inner wall of the fixing ring is adjusted by rotating the sealing plug.

[0007] Furthermore, a side of the plug away from the handle is configured as an arc surface, and the curvature of the arc surface is consistent with the curvature of the inner wall of the fixing ring.

[0008] Furthermore, a matching concave-convex structure is provided on the side of the plug away from the handle and on the inner wall of the fixing ring, and the dialysis bag is sealed by the concave-convex structure.

[0009] Furthermore, a plurality of convex strips are provided on the arc surface of the plug away from the handle, and a plurality of grooves are provided on the fixing ring at positions corresponding to the arc surface of the plug away from the handle;

[0010] Alternatively, a plurality of grooves are provided on the arc surface of the plug away from the handle, and a plurality of convex strips are provided on the fixing ring at positions corresponding to the arc surface of the plug away from the handle;

[0011] A plurality of convex strips and a plurality of grooves are matched one by one to further ensure the sealing performance.

[0012] Furthermore, the handle is an arc-shaped handle, which is convenient for tightening and has no sharp parts to avoid collision with the wall of the centrifuge tube.

[0013] Furthermore, the curvature of the handle is consistent with the curvature of the outer peripheral surface of the fixing ring, and can fit with the fixing ring after being tightened, making the entire structure more compact and compact, and better suitable for small glass containers such as glass centrifuge tubes.

[0014] The utility model has the following beneficial effects:

[0015] The dialysis bag sealing clip of the utility model has a small size and can be used in small glass containers such as glass centrifuge tubes, and the connection method is convenient for disassembly, simple and quick, and highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a dialysis bag sealing clamp of an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the convex strips on the arc surface b of the plug head of the embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the groove on the inner wall of the fixing ring of the embodiment of the utility model. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] like Figures 1 to 3As shown, a dialysis bag sealing clamp includes a fixing ring c and a sealing plug. The sealing plug includes a handle 1, a rod 2 and a plug 3. The handle 1 and the plug 3 are connected to the two ends of the rod 2 respectively. A radial threaded through hole is provided on the side wall of the fixing ring c. The outer surface of the rod 2 is provided with a thread. The rod 2 is inserted into the threaded through hole of the fixing ring c. The plug 3 is located in the fixing ring c. The handle 1 is located outside the fixing ring c. The gap between the plug 3 and the inner wall of the fixing ring c is adjusted by rotating the sealing plug. The opening of the dialysis bag is plugged into the gap between the plug 3 and the inner wall of the fixing ring c. The sealing plug is rotated, and the plug 3 approaches the inner wall of the fixing ring c until the opening of the dialysis bag is sealed. The sealing plug is rotated in the opposite direction to loosen the opening of the dialysis bag, thereby separating the dialysis bag from the fixing clamp. The fixing ring c of the present embodiment is in the shape of a circular ring. In other embodiments, it may also be in the shape of an elliptical ring, a C-shape or other shapes with smaller lateral dimensions and a more rounded shape, which is more convenient for being placed in a glass centrifuge tube with a smaller diameter. The relatively rounded design such as a circular ring and an elliptical shape has no sharp parts and can avoid friction or collision with the inner wall of the centrifuge tube that causes large stress.

[0022] As a preferred design, the side of the plug 3 away from the handle 1 is set as a curved surface b, and the curvature of the curved surface is consistent with the curvature of the inner wall of the fixing ring c, thereby ensuring the sealing performance. The plug 3 is preferably made of elastic materials such as rubber and silicone. In order to ensure the sealing performance, the side of the plug 3 away from the handle 1 is provided with a matching concave-convex structure with the inner wall of the fixing ring c, and the concave-convex structure is used to press the opening of the dialysis bag, so that the opening of the dialysis bag is uneven to keep the opening closed.

[0023] Several convex strips 4 are provided on the arc surface of the plug 3 away from the handle 1, and several grooves 5 are provided on the fixing ring c at the position corresponding to the arc surface b on the side of the plug 3 away from the handle 1, and the several convex strips 4 and the several grooves 5 are matched one by one. Preferably, there are multiple convex strips 4 and grooves 5, and each additional convex strip 4 and groove 5 is equivalent to adding a compression seal, thereby forming a multi-channel compression structure to ensure the sealing effect. Preferably, the convex strip 4 extends along the length direction of the arc surface, and the length of the convex strip 4 is not less than the opening width of the dialysis bag to be sealed, but the shape of the convex strip 4 is not limited to this, for example, a cross-shaped convex strip 4 can also be used. It is also possible to set multiple convex points on the arc surface of the plug 3 away from the handle 1 instead of the convex strip 4, and the multiple convex points match the multiple grooves 5 on the fixing ring c one by one to form a multi-point clamping. It is also possible to set the convex point or convex strip 4 on the inner wall of the fixing ring c, and set the groove 5 on the arc surface of the plug 3. There are many combinations of concave and convex structures, which are not limited to those described in this article.

[0024] Preferably, the handle 1 is an arc-shaped handle 1, and its curvature is consistent with the curvature of the outer peripheral surface of the fixing ring c, so as to facilitate tightening the sealing plug and make the handle 1 fit the outer side of the fixing ring c better. When the sealing plug is fully tightened, the handle 1 will fit as close to the outer side of the fixing ring c as possible, thereby preventing the handle 1 from protruding too much and increasing the size of the fixing clamp. The minimum size of the fixing clamp is equivalent to the diameter of the fixing ring c plus the thickness of the handle 1. The inner circumference of the fixing ring c is slightly longer than the width of the dialysis belt opening to close the dialysis bag. It is shorter than the bar-shaped straight plate clamp in the prior art, so it can adapt to smaller caliber centrifuge tubes.

[0025] As described above, the embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model. Therefore, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the protection scope of the utility model.

Claims

1. A dialysis bag sealing clip, characterized in that: It includes a fixing ring and a sealing plug, which includes a handle, a rod and a plug. The handle and the plug are respectively connected to the two ends of the rod. A radial threaded through hole is provided on the side wall of the fixing ring, and a thread is provided on the outer surface of the rod. The rod is inserted into the threaded through hole of the fixing ring, the plug is located in the fixing ring, and the handle is located outside the fixing ring. The gap between the plug and the inner wall of the fixing ring is adjusted by rotating the sealing plug.

2. The dialysis bag sealing clamp according to claim 1, characterized in that: The side of the plug away from the handle is set as a curved surface, and the curvature of the curved surface is consistent with the curvature of the inner wall of the fixing ring.

3. The dialysis bag sealing clamp according to claim 1, characterized in that: The side of the plug away from the handle is provided with a matching concave-convex structure on the inner wall of the fixing ring, and the dialysis bag is sealed by the concave-convex structure.

4. The dialysis bag sealing clamp according to claim 3, characterized in that: The arc surface of the plug away from the handle is provided with a plurality of convex strips, and the fixing ring is provided with a plurality of grooves at positions corresponding to the arc surface of the plug away from the handle; or, the arc surface of the plug away from the handle is provided with a plurality of grooves, and the fixing ring is provided with a plurality of convex strips at positions corresponding to the arc surface of the plug away from the handle; A plurality of convex strips and a plurality of concave grooves are matched one by one.

5. The dialysis bag sealing clamp according to claim 1, characterized in that: The handle is an arc-shaped handle.

6. The dialysis bag sealing clamp according to claim 5, characterized in that: The curvature of the handle is consistent with the curvature of the outer peripheral surface of the fixing ring.

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