Dual-purpose test tube

Abstract

The utility model discloses a dual-purpose test tube and relates to the technical field of experimental inspection tools. The dual-purpose test tube comprises an outer tube and a test tube cover hermetically covering the outer tube, an inner tube is further embedded in the outer tube, a first corner cut is arranged on the inner edge of the top of the inner tube and extends outwards from the top of the inner tube to form a tube orifice shoulder erected on the top of the outer tube, and a conical protrusion matched with the first corner cut is arranged on the inner surface of the top of the test tube cover. The test tube cover is reasonable in structural design and good in sealing performance, the outer tube can be independently sealed by the test tube cover, and the outer tube and the inner tube can be simultaneously sealed by the test tube cover.

Description

Technical Field

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

[0002] During experimental testing, test tubes are often used to hold and store liquids. To prevent the liquid in the test tube from leaking, or to prevent dust and bacteria, a test tube cap is used to seal the test tube. For some tests, double-layer test tubes are also required. When using double-layer test tubes, in addition to preventing liquid leakage, dust and bacteria, it is also necessary to prevent the mixing of substances such as liquid between the inner and outer test tubes. However, the test tube caps on the market can often only seal the outer test tube singly, and cannot seal both the inner and outer test tubes simultaneously, which may lead to the mixing of substances such as liquid between the inner and outer test tubes and sample contamination, resulting in deviation of experimental results. Utility Model Content

[0003] The technical problem to be solved by this utility model is that the existing test tube caps can only seal the outer test tube singly and cannot seal both the inner and outer test tubes simultaneously. For this reason, this application provides a dual-purpose test tube. When the outer test tube is used alone, it can be sealed by a test tube cap, and when both layers of test tubes are used, both the inner and outer test tubes can be sealed by the test tube cap simultaneously.

[0004] To solve the above technical problem, this utility model provides a dual-purpose test tube, which includes an outer tube and a test tube cap covering the outer tube. An inner tube is also embedded in the outer tube. A first cut angle is provided along the inner edge at the top of the inner tube, and the first cut angle extends outward at the top of the inner tube to form a nozzle shoulder erected on the top of the outer tube. The test tube cap is hermetically arranged at the top end of the outer tube, and a conical protrusion matching the first cut angle is provided on the inner surface of the top of the test tube cap.

[0005] Further, a platform is provided at the top of the outer tube, and a second cut angle is provided along the inner edge of the platform. A lower cut angle matching the second cut angle is arranged between the nozzle shoulder and the outer side wall of the inner tube, and the diameter of the outer side wall of the inner tube is the same as the inner diameter of the outer tube.

[0006] Further, silicone sealing layers are provided on both the first cut angle and the second cut angle.

[0007] Further, internal threads are provided on the side wall of the test tube cap, and external threads matching the internal threads are provided on the outer wall of the upper end of the outer tube.

[0008] Further, there are several holes at the bottom of the inner tube.

[0009] A dual-purpose test tube provided by the present utility model has the following beneficial effects: The test tube cap is hermetically arranged at the top end of the outer tube. When the outer tube is used alone, the outer tube can be sealed separately. When both the inner tube and the outer tube are used simultaneously, the conical protrusion on the inner surface of the top of the test tube cap fits with the first cut angle of the inner tube, and the inner tube can be sealed, thereby achieving the function of sealing both the outer tube and the inner tube. In addition, when the test tube cap is covered downward on the outer tube, the outer side wall, the lower cut angle and the tube mouth shoulder of the inner tube are respectively in close contact with the inner wall, the second cut angle and the platform of the outer tube, ensuring a tight fit between the outer tube and the inner tube and strengthening the sealing performance of the test tube cap for the dual-purpose test tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0011] Figure 2 It is an exploded structure schematic diagram of the present application.

[0012] Figure 3 It is a schematic sectional view of the present application.

[0013] Figure 4 It is a schematic diagram of the structure of the test tube cap of the present application.

[0014] Figure 5 It is an exploded schematic diagram of the present application.

[0015] Figure 6 It is an enlarged sectional view of the present application.

[0016] Description of the reference numerals: 1. Test tube cap; 11. Conical protrusion; 2. Outer tube; 21. Platform; 22. Second cut angle; 3. Inner tube; 31. First cut angle; 32. Tube mouth shoulder; 33. Lower cut angle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings of the present utility model. Obviously, all the described content cannot list all the implementation schemes. The following embodiments are only a part of the numerous implementation schemes, rather than all the embodiments. Based on the disclosed content of the present utility model, all other implementation results obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Embodiment 1

[0019] As Figure 1 , Figure 2 and Figure 5As shown in the figure, a dual-purpose test tube includes an outer tube 2 and a test tube cap 1 covering the outer tube 2. An inner tube 3 is also embedded in the outer tube 2. There is a first chamfer 31 along the inner edge at the top of the inner tube 3. The first chamfer 31 extends outward at the top of the inner tube 3 to form a nozzle shoulder 32 erected on the top of the outer tube 2. The test tube cap 1 is hermetically arranged at the top end of the outer tube 2. As Figure 4 shown, a conical protrusion 11 matching the first chamfer 31 is arranged on the inner surface of the top of the test tube cap 1. The outer tube 2 can be used alone in combination with the test tube cap 1, and the test tube cap 1 hermetically seals the outer tube 2 alone. The test tube cap 1 can also seal the inner tube 3 by fitting the conical protrusion 11 into the first chamfer 31, thereby sealing both the inner and outer layers of the test tube simultaneously. The nozzle shoulder 32 enables the inner tube 3 to be erected on the outer tube 2 without falling into the outer tube 2.

[0020] As Figure 2 , Figure 3 , Figure 5 and Figure 6 shown, a platform 21 is arranged at the top of the outer tube 2. A second chamfer 22 is arranged along the inner edge of the platform 21. A lower chamfer 33 matching the second chamfer 22 is arranged between the nozzle shoulder 32 and the outer side wall of the inner tube 3. The diameter of the outer side wall of the inner tube 3 is the same as the inner diameter of the outer tube 2. When the test tube cap 1 is covered downward on the outer tube 2, the outer side wall of the inner tube 3, the lower chamfer 33 and the nozzle shoulder 32 are respectively in close contact with the inner wall of the outer tube 2, the second chamfer 22 and the platform 21, ensuring the fitting between the outer tube 2 and the inner tube 3 and strengthening the sealing performance of the test tube cap 1 for the dual-purpose test tube.

[0021] Example 2

[0022] In addition to the technical solution in Example 1, silicone sealing layers are arranged on both the first chamfer 31 and the second chamfer 22. A corresponding close contact relationship exists between the first chamfer 31 and the conical protrusion 11, and between the second chamfer 22 and the lower chamfer 33. The silicone sealing layer is arranged at the close contact position of the two, which can further strengthen the sealing performance between the test tube cap 1 and the inner tube 2, and between the inner tube 2 and the outer tube 3; it can also strengthen the sealing performance between the test tube cap 1 and the outer tube 3 when the outer tube is used alone.

[0023] Example 3

[0024] The difference between this example and Example 1 lies only in the way the test tube cap 1 is hermetically arranged at the top end of the outer tube 2. An internal thread is arranged on the side wall of the test tube cap 1, and an external thread matching the internal thread is arranged on the outer wall of the upper end of the outer tube 2. The test tube cap 1 is screwed onto the top end of the outer tube 2 to ensure the tightness between the test tube cap 1 and the outer tube 2.

[0025] Example 4

[0026] The difference between this example and Example 1 lies only in that there are several holes at the bottom of the inner tube 3. The inner tube 3 with holes can be used as a filter, facilitating operations such as wet-dry separation of samples.

[0027] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Equivalent changes made to the structure, shape, and principle within the scope of knowledge possessed by those of ordinary skill in the relevant art all fall within the protection scope of the present utility model.

Claims

1. A dual-purpose test tube, comprising an outer tube (2) and a test tube cover (1) disposed on the outer tube (2), characterized in that: An inner tube (3) is also embedded in the outer tube (2); a first cut corner (31) is provided on the inner edge of the top of the inner tube (3); the first cut corner (31) extends outward from the top of the inner tube (3) to form a tube mouth shoulder (32) mounted on the top of the outer tube (2); the test tube cover (1) is sealingly arranged on the top of the outer tube (2); and a conical protrusion (11) matching the first cut corner (31) is provided on the inner surface of the top of the test tube cover (1).

2. The dual-purpose test tube according to claim 1, characterized in that: The outer tube (2) is provided with a platform (21) at the top, and a second cut angle (22) is provided at the inner edge of the platform (21). A lower cut angle (33) matching the second cut angle (22) is provided between the tube mouth shoulder (32) and the outer wall of the inner tube (3), and the diameter of the outer wall of the inner tube (3) is the same as the inner diameter of the outer tube (2).

3. The dual-purpose test tube according to claim 2, characterized in that: A silicone sealing layer is provided on the first cut corner (31) and the second cut corner (22).

4. The dual-purpose test tube according to claim 1, characterized in that: The side wall of the test tube cover (1) is provided with an internal thread, and the outer wall of the upper end of the outer tube (2) is provided with an external thread matching the internal thread.

5. The dual-purpose test tube according to claim 1, characterized in that: The bottom of the inner tube (3) is provided with a plurality of holes.

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