Tube cap structure with filtering function and test tube

Abstract

The utility model provides a tube cap structure with a filtering function and a test tube. The pipe cap structure with the filtering function comprises a sampling opening, a filter and a pipe cap main body, the sampling port is fixedly connected with the filter; the filter is fixedly connected with the pipe cap main body; the filter comprises a filter outer frame, a filter membrane and a pressing block; a notch is formed in the filter outer frame, and the filter membrane can penetrate through the notch; the filter outer frame comprises a first dismounting part; the filter membrane comprises a handle, a second dismounting part and a filter membrane main body; the handle and the second dismounting part are respectively positioned on two sides of the filter membrane main body; and the second dismounting part is detachably connected with the first dismounting part. According to the pipe cap structure, the first dismounting part is arranged on the filter outer frame, the second dismounting part and the handle are arranged on the filter membrane, and the first dismounting part and the second dismounting part are detachably connected, so that the pipe cap structure has the function of being convenient to dismount, and the universality and the maintenance convenience are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratories, in particular to a tube cap structure and a test tube with a filtering function. Background Art

[0002] In most existing laboratories, filtration is an indispensable routine laboratory operation. Filtration is used to remove impurities and some bacteria in laboratory test solutions.

[0003] Current filters include stand-alone filters and integrated filters integrated into test tubes, but most filters have the disadvantage that the filter membrane replacement operation is complicated or even impossible to replace the filter membrane.

[0004] Patent document CN 206052013 U discloses a centrifuge tube with a cell filter, which belongs to a cell culture centrifuge tube and aims to provide a centrifuge tube with a cell filter. It has the advantages of reducing the retention of cell solution on the filter membrane and avoiding waste of cell solution. However, it is not designed with a structure that facilitates the replacement of the filter membrane, so the defect of difficulty in replacing the filter membrane still exists. Utility Model Content

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a tube cap structure and a test tube with a filtering function.

[0006] According to the utility model, a pipe cap structure with filtering function is provided, comprising a sampling port, a filter and a pipe cap body;

[0007] The sampling port is tightly connected to the filter; the filter is directly or indirectly tightly connected to the tube cap body;

[0008] The filter comprises a filter outer frame, a filter membrane and a pressing block;

[0009] The filter outer frame is provided with a notch, and the filter membrane can pass through the notch; the filter outer frame includes a first disassembly portion; and a pressing block is mounted on the first disassembly portion;

[0010] The filter membrane includes a handle, a second disassembly portion and a filter membrane body. The handle and the second disassembly portion are respectively located on both sides of the filter membrane body; the second disassembly portion is detachably connected to the first disassembly portion.

[0011] Preferably, a slot is provided on the first disassembly portion, and the pressing block is installed on the slot.

[0012] Preferably, the second disassembly portion includes a limiting column, a clamping block and an elastic connecting piece;

[0013] There are two limit columns, and the elastic connecting piece is installed between the two limit columns. A card block is also installed on the limit column; the card block can match the card slot, and when the card block is located in the card slot, the pressing block and the card block are in contact with each other.

[0014] Preferably, the elastic connecting member is a spring structure, and the pressing block is a rubber block.

[0015] Preferably, a sealing sheet is provided on the circumference of the filter membrane body, and rubber pads are provided on the top and bottom surfaces of the notch;

[0016] The sealing sheet can be matched with the filter outer frame.

[0017] Preferably, the sampling port is connected to the filter by welding, and the tube cap body is directly or indirectly connected to the filter by welding.

[0018] Preferably, the filter is connected to the pipe cap body by welding through a connecting pipe.

[0019] Preferably, the sampling port is a Luer sampling port.

[0020] According to a test tube provided by the utility model, the tube cap structure with filtering function is adopted, and the test tube further comprises a tube body, which is threadedly connected to the tube cap structure.

[0021] Preferably, the test tube is a centrifuge tube.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The utility model provides a first disassembly portion on the filter outer frame, a second disassembly portion and a handle on the filter membrane, and a design in which the first disassembly portion and the second disassembly portion are detachably connected, so that the pipe cap structure has the function of being easy to disassemble. When the filtration accuracy is required to be changed or the original filter membrane is clogged, the filter membrane can be replaced, thereby improving versatility and convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0025] Figure 1 A schematic structural diagram of a centrifuge tube provided by the utility model;

[0026] Figure 2 A schematic diagram of the structure of the filter provided by the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the filter frame provided by the utility model;

[0028] Figure 4 A schematic diagram of the structure of the filter membrane provided by the utility model;

[0029] The figure shows:

[0030]

[0031] DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art further understand the present invention, but are not intended to limit the present invention in any way. It should be noted that a person skilled in the art may make various variations and improvements without departing from the scope of the present invention. Such variations and improvements are all within the scope of protection of the present invention.

[0033] The utility model provides a pipe cap structure with a filtering function, comprising a sampling port 1, a filter 2 and a pipe cap body 3; the sampling port 1 is fastened to the filter 2; the filter 2 is directly or indirectly fastened to the pipe cap body 3; the filter 2 comprises a filter outer frame 21, a filter membrane 22 and a pressing block 23; in a preferred example, the sampling port 1 is welded to the filter 2, and the pipe cap body 3 is directly or indirectly welded to the filter 2. Specifically, the filter 2 and the pipe cap body 3 can be welded to each other through a connecting pipe 4.

[0034] The filter outer frame 21 is provided with a notch 211 , through which the filter membrane 22 can pass; the filter outer frame 21 includes a first disassembly portion 212 ; and the pressing block 23 is mounted on the first disassembly portion 212 ;

[0035] The filter membrane 22 includes a handle 221 , a second disassembly portion 222 and a filter membrane body 223 . The handle 221 and the second disassembly portion 222 are respectively located on both sides of the filter membrane body 223 . The second disassembly portion 222 is detachably connected to the first disassembly portion 212 .

[0036] A slot 213 is provided on the first disassembly portion 212 , and the pressing block 23 is installed on the slot 213 .

[0037] The second disassembly portion 222 includes a limiting post 224, a block 225, and an elastic connector 226. There are two limiting posts 224, with the elastic connector 226 mounted between the two limiting posts 224. A block 225 is also mounted on the limiting post 224. The block 225 is capable of matching with the slot 213. When the block 225 is located in the slot 213, the pressing block 23 and the block 225 contact each other. In a preferred embodiment, the elastic connector 226 is a spring structure, and the pressing block 23 is a rubber block.

[0038] A sealing sheet 227 is provided circumferentially around the filter membrane body 223, and rubber pads 228 are provided on the top and bottom surfaces of the notch 211. The sealing sheet 227 mates with the filter outer frame 21 to provide a seal. Specifically, one side of the sealing sheet 227 mates with the inner wall of the filter outer frame 21, and the other side of the sealing sheet 227 mates with the notch 211.

[0039] In a preferred embodiment, the sampling port 1 is a Luer sampling port.

[0040] The present invention can also be understood as follows: a small circular hole is located in the center of the cap body 3, to which a filter 2 is welded. The liquid inlet above the filter 2 is designed as a Luer sampling port. The side of the filter 2 features a rubber joint (i.e., a push-down block 23) that can be pushed inward. The filter membrane 22 is designed to be removable and replaceable, with a snap and slot for connection, allowing for replacement of membranes of different pore sizes according to user needs.

[0041] The removal and replacement process is as follows: To remove the filter membrane 22, the operator presses the pressing block 23, which squeezes the clamping block 225, causing it to disengage from the slot 213. The operator then pulls the handle to remove the filter membrane 22 through the notch 211. The new filter membrane 22 is inserted into the filter frame 21 through the notch 211, and the clamping block 225 enters the slot 213, completing the installation. In a preferred embodiment, the filter membrane 22 and the filter frame 21 are both constructed such that the top diameter is larger than the bottom diameter. This design prevents the filter membrane 22 from rotating downward due to gravity.

[0042] The present invention also provides a test tube, which adopts the tube cap structure with filtering function. Preferably, the test tube is a 50ml centrifuge tube. The centrifuge tube is a 50ml centrifuge tube that is convenient for filtration and reusable. Specifically, the entire tube cap structure is welded and formed, and the connection between the centrifuge tube body and the tube cap structure is a spiral structure, which can be disassembled and replaced. The centrifuge tube is in a sealed state when it leaves the factory. The tube cap structure can be adapted for use. In practical operation, after the syringe with the test solution is connected to the female Luer sampling port interface, the syringe is connected to the centrifuge tube. At this time, the vacuum environment inside the centrifuge tube will slowly pass the test solution in the syringe through the filter and then be sucked into the centrifuge tube below until the test solution in the syringe completely enters the centrifuge tube. After removing the syringe, the Luer sampling port automatically rebounds, and the closed state inside the centrifuge tube is restored. If conditions permit, the centrifuge tube cover can be replaced with an ordinary centrifuge tube after use.

[0043] In addition to being able to easily replace the filter membrane 22, the utility model also has the following advantages:

[0044] Compared with the existing common stand-alone filters, the common stand-alone filters will touch both sides of the filter during the process of filtering the liquid into a 50ml centrifuge tube and the process of assembling the syringe and the filter. However, manual filtration is more laborious and the liquid is easily spilled when injected in the air. The filter and the 50ml centrifuge tube are open and docking cannot ensure that the filtered liquid is sterile and free of impurities. When the test solution contains a lot of impurities, the filter membrane is easily clogged, and the filter needs to be replaced frequently. The test solution after filtration by the utility model can remain in a sealed state and is not disturbed by external pollution sources. Therefore, the utility model can also improve the sterility of the test solution after experimental filtration, avoid contamination of the filtered test solution due to the filtration operation, and can be reused, making it more convenient to change the filtration conditions.

[0045] In addition to facilitating the replacement of the filter membrane 22, the present invention adopts a welding connection between the sampling port 1 and the filter 2, and a direct or indirect welding connection between the tube cap body 3 and the filter 2, and is also provided with a sealing sheet 227, a rubber pad 228 and other designs, which can ensure the sealing during the filtration process. Moreover, since the tube cap structure with a filtering function is welded as a whole, it can ensure that the filtered liquid is sterile and free of impurities, and the operation of the present invention is more convenient.

[0046] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0047] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A pipe cap structure with filtering function, characterized in that: It comprises a sampling port (1), a filter (2) and a tube cap body (3); The sampling port (1) is tightly connected to the filter (2); the filter (2) is directly or indirectly tightly connected to the tube cap body (3); The filter (2) comprises a filter outer frame (21), a filter membrane (22) and a pressing block (23); The filter outer frame (21) is provided with a notch (211), and the filter membrane (22) can pass through the notch (211); the filter outer frame (21) includes a first disassembly portion (212); and a pressing block (23) is mounted on the first disassembly portion (212); The filter membrane (22) comprises a handle (221), a second disassembly portion (222) and a filter membrane body (223); the handle (221) and the second disassembly portion (222) are respectively located on both sides of the filter membrane body (223); the second disassembly portion (222) is detachably connected to the first disassembly portion (212).

2. The pipe cap structure with filtering function according to claim 1, characterized in that: A card slot (213) is provided on the first disassembly portion (212), and the pressing block (23) is mounted on the card slot (213).

3. The pipe cap structure with filtering function according to claim 2, characterized in that: The second disassembly portion (222) includes a limiting column (224), a clamping block (225) and an elastic connecting piece (226); There are two limit posts (224), an elastic connector (226) is installed between the two limit posts (224), and a clamping block (225) is also installed on the limit post (224); the clamping block can match the clamping slot (213), and when the clamping block (225) is located in the clamping slot (213), the pressing block (23) and the clamping block (225) are in contact with each other.

4. The pipe cap structure with filtering function according to claim 3, characterized in that: The elastic connecting member (226) is a spring structure, and the pressing block (23) is a rubber block.

5. The pipe cap structure with filtering function according to claim 1, characterized in that: A sealing sheet (227) is provided on the circumference of the filter membrane body (223), and rubber pads (228) are provided on the top and bottom surfaces of the notch (211); The sealing sheet (227) can match the filter outer frame (21).

6. The pipe cap structure with filtering function according to claim 1, characterized in that: The sampling port (1) is connected to the filter (2) by welding, and the tube cap body (3) is directly or indirectly connected to the filter (2) by welding.

7. The pipe cap structure with filtering function according to claim 6, characterized in that: The filter (2) and the pipe cap body (3) are connected by welding via a connecting pipe (4).

8. The pipe cap structure with filtering function according to claim 1, characterized in that: The sampling port (1) is a Luer sampling port.

9. A test tube, characterized in that The pipe cap structure with filtering function according to any one of claims 1 to 8 further comprises a pipe body (5), wherein the pipe body (5) is threadedly connected to the pipe cap structure.

10. The test tube according to claim 9, characterized in that The test tube is a centrifuge tube.

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