Liquid taking test tube

Abstract

The utility model discloses a liquid taking test tube, and relates to the technical field of experimental inspection tools. The test tube structurally comprises a test tube body and a test tube cover, an opening with the diameter smaller than the inner diameter of the test tube body is formed in the top of the test tube cover, the test tube cover detachably covers the top of the test tube body, a membrane with the outer diameter equal to the inner diameter of the test tube cover is further arranged between the test tube cover and the test tube body, and the middle of the membrane is divided into three or more triangular valves. The liquid taking device is reasonable in structural design, has certain sealing performance, is convenient to use, and does not damage a liquid taking tool.

Description

Technical Field

[0001] This application relates to the technical field of experimental testing tools, and particularly to a liquid-taking test tube. Background Art

[0002] For some tests, test tubes are required that have a certain degree of sealing and can facilitate liquid-taking for detection. In the prior art, a thin film sealing layer is arranged between two horizontal convex edges inside the test tube cap to achieve the functions of sealing and puncturability. Its disadvantages are that the thin film is easily broken and deformed, and it is difficult to ensure integrity and sealing when installed at the test tube cap. Moreover, after the thin film is punctured once for liquid-taking, it is damaged or even torn, further destroying the integrity and sealing, and it is not convenient for repeated liquid-taking. There is also prior art that achieves the functions of sealing and convenient liquid-taking by covering a PE film and a silica gel film at the test tube cap and setting a splitting line. However, while the PE film helps the thin film to rebound, it will also scratch the sampling tube or pipette needle, damaging precision instruments. Utility Model Content

[0003] The technical problem to be solved by this utility model is that for test tubes used in tests, they need to have a certain degree of sealing during operations such as centrifugation, tilting, or even inversion. At the same time, it should be convenient to take liquid repeatedly without opening the test tube cap, and precision experimental instruments such as pipette needles and pipettes should be protected. For this reason, this application provides a liquid-taking test tube with a certain degree of sealing, which can facilitate repeated liquid-taking without opening the test tube cap and does not damage the liquid-taking tools.

[0004] To solve the above technical problem, this utility model provides a liquid-taking test tube, which includes a test tube body and a test tube cap. The top of the test tube cap has an opening with a diameter smaller than the inner diameter of the test tube body. The test tube cap is detachably covered on the top of the test tube body. A membrane with an outer diameter the same as the inner diameter of the test tube cap is also arranged between the test tube cap and the test tube body. The middle part of the membrane is divided into three or more triangular valves.

[0005] Further, the membrane is a silica gel membrane with resilience, and a through-hole for a pipette needle to pass through is arranged in the middle of the membrane.

[0006] Further, the diameter of the through-hole is 1.5 millimeters - 3.5 millimeters.

[0007] Further, the edge of the membrane is thicker than the middle part.

[0008] Further, a limiting ring is arranged at the upper part of the test tube body to limit the side wall of the test tube cap from continuing to move downwards.

[0009] The beneficial effects of the liquid-taking test tube provided by this utility model are as follows:

[0010] 1. Sealing property: The diaphragm is divided into multiple triangular valves, and a through-hole is provided in the middle, which can avoid the overlapping and mutual interference between adjacent and diagonal valves, thus affecting the sealing effect; the diameter of the through-hole provided in the middle of the diaphragm is small, which can avoid the dripping of the liquid in the test tube even when it is inverted; the diaphragm is made of silica gel, and silica gel has hydrophobicity, combined with the small holes and the through-hole, which can further effectively avoid the leakage of liquid; moreover, the resilience of the silica gel diaphragm enables the diaphragm to rebound and return to its original position after being penetrated and deformed, ensuring the sealing property.

[0011] 2. Convenient liquid extraction: The liquid extraction test tube of this application can be operated without opening the test tube cap, which not only saves labor and shortens the operation time of opening the cap, but also avoids laboratory contamination and ensures safety; the diaphragm is divided into multiple triangular valves, enabling the neck of the pipette, sampling tube or funnel to directly penetrate through the diaphragm part to extract or collect liquid; when the sampling tube or pipette is relatively thick, the triangular valves enable the diaphragm to deform and extend the size of the through-hole in the middle, so that the thicker tube body can also smoothly penetrate through the diaphragm to extract or deliver liquid.

[0012] 3. No damage to liquid extraction tools: The setting of the through-hole avoids the puncture and deformation of the pipette, prolonging the service life of the pipette. The diaphragm is made of silica gel, and instead of using a relatively hard PE film, it can effectively reduce the scratching of the side walls of the liquid extraction and delivery tools. Description of the Drawings

[0013] Figure 1 It is the overall structure diagram of this application.

[0014] Figure 2 It is the exploded view of this application.

[0015] Figure 3 It is the sectional view of this application.

[0016] Figure 4 It is the overall structure schematic diagram of this application.

[0017] Figure 5 It is the exploded schematic diagram of this application.

[0018] Figure 6 It is the sectional schematic diagram of this application.

[0019] Description of the reference numerals: 1. Test tube body; 11. Limit ring; 2. Test tube cap; 21. Opening; 3. Diaphragm; 31. Triangular valve; 32. Through-hole. Detailed Embodiment

[0020] The following will be combined with the drawings of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described content cannot fully exemplify all implementation schemes. The following examples are only a part of many implementation schemes, not all examples. Based on the disclosure of the utility model, all other implementation results obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0021] Example 1

[0022] like Figure 1 and Figure 4 As shown, a liquid collection test tube includes a test tube body 1 and a test tube cover 2. The top of the test tube cover 2 has an opening 21 with a diameter smaller than the inner diameter of the test tube body 1. The test tube cover 2 can be detachably covered on the top of the test tube body 1. A diaphragm 3 with an outer diameter the same as the inner diameter of the test tube cover 2 is also provided between the test tube cover 2 and the test tube body 1. The middle part of the diaphragm 3 is divided into three or more triangular valves 31. The opening at the top of the test tube cover 2 is smaller than the inner diameter of the test tube body 1, so that the edge of the top opening of the test tube cover 2 has a certain width, and the diaphragm 3 can be firmly clamped between the top of the test tube body 1, so that the diaphragm 3 is not displaced and deformed by the liquid collection and delivery operations. The top of the test tube cover 2 is provided with an opening 21, and the middle part of the diaphragm 3 is divided into triangular valves 31 that can be expanded and rebounded. Such a structure allows the liquid collection test tube to be operated without removing the test tube cover 2, and the deformable and rebound characteristics of the triangular valve 31 enable thicker liquid collection and delivery tools to pass through the diaphragm 3 to smoothly collect and deliver liquid.

[0023] like Figure 3 and Figure 6 As shown, the edge of the diaphragm 3 is thicker than the middle. The thicker annular edge of the diaphragm 3 facilitates the clamping of the test tube cover 2 and the top of the test tube body 1. The thick edge is slightly harder and will not easily deform and get stuck in the test tube body 1, causing displacement and unevenness, thereby reducing the airtightness. Thickening the edge of the diaphragm 3 as the base (bottom edge) of the triangular valve 31 will make the edge provide greater support to the thinner middle part, further ensuring the rebound of the triangular valve 31 after deformation during liquid extraction.

[0024] like Figure 2 and Figure 5 As shown, a limiting ring 11 is provided on the upper part of the test tube body 1 to limit the side wall of the test tube cover 2 from moving downward. The limiting ring 11 limits the test tube cover from moving downward too much, preventing the silicone diaphragm 3 from being excessively squeezed and deformed by the test tube cover 2 to affect the flatness, thereby causing the triangular valve 31 to shift and reduce the sealing performance. The limiting ring 11 also ensures that the test tube cover 2 is closed in an appropriate position to fix the silicone diaphragm 3.

[0025] Example 2

[0026] The difference between this embodiment and embodiment 1 is that a through hole is further provided in the middle of the diaphragm 3, such as Figure 2 andFigure 5 As shown, the diaphragm 3 is a silicone diaphragm with resilience, and a through hole 32 for the pipetting needle to pass through is provided in the middle of the diaphragm 3. The silicone material is soft and will not damage the tools for liquid extraction and delivery. Moreover, the silicone diaphragm 3 itself has resilience. The through hole 32 provided in the middle of the diaphragm 3 reduces the amount of deformation of the diaphragm 3 during liquid extraction, and the support of the base (bottom edge) of the triangular valve 31 to the valve tip can enhance the overall resilience of the valve. The through hole 32 is provided in the middle of the diaphragm 3, and the liquid extraction operation will not block the tip of the pipetting needle and cause the tip to be deformed and damaged. Moreover, the setting of the through hole 32 can avoid the overlapping and mutual interference between adjacent and diagonal valves, which affects the sealing effect.

[0027] Furthermore, the diameter of the through hole 32 is 1.5 mm - 3.5 mm. The smaller diameter of the through hole makes it not easy to leak liquid even when the test tube is centrifuged, tilted or inverted, providing a certain degree of sealing.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Equivalent changes made to the structure, shape and principle within the knowledge scope of those of ordinary skill in the art all fall within the protection scope of the present invention.

Claims

1. A liquid collection test tube, comprising a test tube body (1) and a test tube cover (2), characterized in that: The top of the test tube cover (2) is provided with an opening (21) whose diameter is smaller than the inner diameter of the test tube body (1); the test tube cover (2) is detachably covered on the top of the test tube body (1); a membrane (3) whose outer diameter is the same as the inner diameter of the test tube cover (2) is also provided between the test tube cover (2) and the test tube body (1); the middle of the membrane (3) is divided into three or more triangular valves (31).

2. The liquid collection test tube according to claim 1, characterized in that: The diaphragm (3) is a silicone diaphragm with resilience, and a through hole (32) for a pipette needle to pass through is provided in the middle of the diaphragm (3).

3. The liquid collection test tube according to claim 2, characterized in that: The diameter of the through hole (32) is 1.5 mm to 3.5 mm.

4. The liquid collection test tube according to claim 1, characterized in that: The edge of the diaphragm (3) is thicker than the middle.

5. The liquid collection test tube according to claim 1, characterized in that: A limiting ring (11) capable of limiting the side wall of the test tube cover (2) from further moving downward is provided on the upper part of the test tube body (1).

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