Portable centrifugal tube for liquid-liquid separation

Abstract

The utility model belongs to the technical field of liquid-liquid centrifugal tubes, and particularly relates to a portable centrifugal tube for liquid-liquid separation, which comprises a centrifugal tube body, a centrifugal tube cap is mounted on the upper portion of the centrifugal tube body, a liquid separation tube and a breather tube are arranged on the centrifugal tube cap, and a first sealing plug is mounted at the top of the liquid separation tube. A second sealing plug is installed at the top of the ventilation pipe, the ventilation pipe extends into the centrifugal tube body, and a sealing piece is arranged between the bottom of the centrifugal tube body and the tail end of the ventilation pipe. And the sealing structure is simple and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid-liquid centrifuge tubes, in particular to a convenient centrifuge tube for liquid-liquid separation. Background Art

[0002] Liquid-liquid extraction is a common method for extracting and purifying compounds. The operation of separating two immiscible liquids after extraction is called liquid separation. During the extraction process, emulsification is likely to occur, where one liquid is evenly dispersed in another liquid in the form of extremely small droplets, making it impossible to separate the liquids. Centrifugation is a commonly used method for rapid demulsification. After demulsification by centrifugation, the liquid in the centrifuge tube needs to be transferred to other instruments for separation. However, it is easy to lose material when transferring liquid from the centrifuge tube, and a too-violent transfer process may cause re-emulsification. In addition, other contaminants are easily introduced during the transfer process, affecting the test results. The above problems can be avoided by directly separating the different liquid layers after demulsification in the centrifuge tube;

[0003] Liquid separation can be performed by providing an air guide tube and a liquid separation tube. In order to prevent gas from entering the ventilation tube, a rotary switch is provided in the ventilation tube and the lower end of the ventilation tube is sealed. However, a rotating rod and a misaligned orifice plate are provided in the ventilation tube. The orifice plate is aligned by rotating the rotating rod to penetrate the ventilation tube or close the ventilation tube. The structure is too complicated and not convenient enough. Utility Model Content

[0004] The utility model provides a convenient centrifuge tube for liquid-liquid separation.

[0005] The utility model provides the following technical solutions:

[0006] A convenient centrifuge tube for liquid-liquid separation comprises a centrifuge tube body, a centrifuge tube cap is installed on the upper part of the centrifuge tube body, a liquid separation tube and a vent tube are provided on the centrifuge tube cap, a first sealing plug is installed on the top of the liquid separation tube, a second sealing plug is installed on the top of the vent tube, the vent tube extends into the interior of the centrifuge tube body, a sealing member is arranged between the bottom of the centrifuge tube body and the end of the vent tube, so as to prevent liquid from entering the vent tube during the liquid-liquid separation process.

[0007] As a further improvement of the above scheme.

[0008] Preferably, the inner top wall of the centrifuge tube cap is funnel-shaped, so as to reduce residue during liquid-liquid separation.

[0009] Preferably, the lower end of the liquid separation tube is connected to the funnel-shaped bottom, so as to reduce the residue during the liquid-liquid separation process.

[0010] Preferably, the sealing member is a groove sealing plug fixed to the bottom of the centrifuge tube body, the groove sealing plug is provided with a groove facing the ventilation pipe, and the groove is adapted to the ventilation pipe.

[0011] Preferably, the sealing member is a conical sealing plug fixed to the bottom of the centrifuge tube body, and the conical sealing plug is conical.

[0012] Preferably, the end of the vent pipe is provided with a flared opening adapted to fit the conical sealing plug.

[0013] Preferably, the sealing member is a hose plug fixed to the end of the vent pipe, a vent hole connected to the vent pipe is provided in the middle of the hose plug, and when the centrifuge tube cap is fixed on the centrifuge tube body, the hose plug is in full contact with the bottom wall of the centrifuge tube body, and the hose plug cooperates with the bottom wall of the centrifuge tube body to form a seal.

[0014] Preferably, an extension section for inserting into the ventilation pipe is reserved at the upper end of the hose plug, and a main section adapted to the wall of the ventilation pipe is connected to the lower part of the extension section, and the bottom surface of the lower part of the main section is an arc-shaped bottom surface adapted to the bottom wall of the centrifuge tube body.

[0015] Preferably, continuous vents are provided at the centers of the extension section and the main body section.

[0016] Preferably, the centrifuge tube cap is connected to the centrifuge tube body through a threaded seal.

[0017] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0018] In the utility model, the present application uses a sealing structure to prevent liquid from entering the ventilation pipe, thereby preventing some liquid from flowing out of the ventilation pipe during liquid separation, and the sealing structure is simple and low-cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a convenient centrifuge tube for liquid-liquid separation provided in Example 1 of the utility model;

[0020] Figure 2 for Figure 1 A partial enlarged view of the

[0021] Figure 3 A schematic diagram of the structure of a convenient centrifuge tube for liquid-liquid separation provided in Example 2 of the utility model;

[0022] Figure 4 for Figure 3 A partial enlarged view of

[0023] Figure 5A schematic diagram of the structure of a convenient centrifuge tube for liquid-liquid separation provided in Example 3 of the utility model;

[0024] Figure 6 for Figure 5 A partial enlarged view of .

[0025] Reference numerals:

[0026] 1. Centrifuge tube cap; 2. First sealing plug; 3. Second sealing plug; 4. Dispensing tube; 5. Ventilation tube; 501. Expanding mouth; 6. Top wall; 7. Centrifuge tube body; 8. Groove sealing plug; 801. Groove; 9. Conical sealing plug; 10. Hose plug; 1001. Extension section; 1002. Main section; 1003. Arc-shaped bottom surface; 1004. Ventilation port. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present utility model, rather than indicating or implying 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 the embodiments of the present utility model.

[0029] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0030] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0031] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the utility model include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0032] Reference Figure 1-Figure 2 Embodiment 1, a convenient centrifuge tube for liquid-liquid separation, comprises a centrifuge tube body 7, a centrifuge tube cap 1 is installed on the upper part of the centrifuge tube body 7, the centrifuge tube cap 1 and the centrifuge tube body 7 are connected by threaded sealing, the inner top wall 6 of the centrifuge tube cap 1 is funnel-shaped, the lower end of the liquid separation tube 4 is connected with the funnel-shaped bottom, the centrifuge tube cap 1 is provided with a liquid separation tube 4 and a vent pipe 5, a first sealing plug 2 is installed on the top of the liquid separation tube 4, a second sealing plug 3 is installed on the top of the vent pipe 5, the vent pipe 5 extends into the interior of the centrifuge tube body 7, a sealing member is arranged between the bottom of the centrifuge tube body 7 and the end of the vent pipe 5, the sealing member is a groove sealing plug 8 fixed to the bottom of the centrifuge tube body 7, the groove sealing plug 8 is provided with a groove 801 facing the vent pipe 5, and the groove 801 is adapted to the vent pipe 5.

[0033] Reference Figure 3-Figure 4 In Example 2, the sealing member is a conical sealing plug 9 fixed to the bottom of the centrifuge tube body 7. The conical sealing plug 9 is conical, and a flared opening 501 adapted to the conical sealing plug 9 is provided at the end of the vent pipe 5.

[0034] Reference Figure 5-Figure 6 Embodiment 3, the sealing member is a hose plug 10 fixed to the end of the vent pipe 5, and a vent 1004 connected to the vent pipe 5 is opened in the middle of the hose plug 10. When the centrifuge tube cap 1 is fixed on the centrifuge tube body 7, the hose plug 10 is in full contact with the bottom wall of the centrifuge tube body 7, and the hose plug 10 cooperates with the bottom wall of the centrifuge tube body 7 to form a seal. An extension section 1001 for inserting into the vent pipe 5 is reserved at the upper end of the hose plug 10, and a main section 1002 adapted to the wall of the vent pipe 5 is connected to the lower part of the extension section 1001, and the bottom surface of the lower part of the main section 1002 is an arc-shaped bottom surface 1003 adapted to the bottom wall of the centrifuge tube body 7, and a continuous vent 1004 is provided at the center of the extension section 1001 and the main section 1002.

[0035] The working principle of the present application is as follows: the centrifuge tube cap 1 is screwed onto the top of the centrifuge tube body 7, the vent pipe 5 is sealed with the bottom of the centrifuge tube body 7, and then the liquid to be separated is poured from the liquid separation tube 4 into the centrifuge tube body 7 through a funnel, and the vent pipe 5 and the liquid separation tube 4 are sealed and then inverted for centrifugation;

[0036] After centrifugation is completed, loosen the centrifuge tube cap 1 to separate the vent tube 5 from the bottom wall of the centrifuge tube body 7, open the second sealing plug 3 that seals the vent tube 5, so that the atmosphere can enter the centrifuge tube body 7 through the vent tube 5, and then open the first sealing plug 2 so that the centrifuged liquid can flow out from the liquid separation tube 4 in sequence.

[0037] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model; in the absence of conflicts, the embodiments of the utility model and the features in the embodiments can be combined with each other. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A convenient centrifuge tube for liquid-liquid separation, characterized in that: It includes a centrifuge tube body, a centrifuge tube cap is installed on the upper part of the centrifuge tube body, a liquid separatory tube and a vent tube are provided on the centrifuge tube cap, a first sealing plug is installed on the top of the liquid separatory tube, a second sealing plug is installed on the top of the vent tube, the vent tube extends into the interior of the centrifuge tube body, and a sealing member is provided between the bottom of the centrifuge tube body and the end of the vent tube.

2. A convenient centrifuge tube for liquid-liquid separation according to claim 1, characterized in that: The inner top wall of the centrifuge tube cap is funnel-shaped.

3. A convenient centrifuge tube for liquid-liquid separation according to claim 2, characterized in that: The lower end of the liquid dispensing tube is communicated with the funnel-shaped bottom.

4. A convenient centrifuge tube for liquid-liquid separation according to claim 1, characterized in that: The sealing member is a groove sealing plug fixed to the bottom of the centrifuge tube body, and the groove sealing plug is provided with a groove facing the ventilation pipe, and the groove is adapted to the ventilation pipe.

5. A convenient centrifuge tube for liquid-liquid separation according to claim 1, characterized in that: The sealing member is a conical sealing plug fixed to the bottom of the centrifuge tube body, and the conical sealing plug is conical.

6. A convenient centrifuge tube for liquid-liquid separation according to claim 5, characterized in that: The end of the vent pipe is provided with a flared opening adapted to the conical sealing plug.

7. A convenient centrifuge tube for liquid-liquid separation according to claim 1, characterized in that: The sealing member is a hose plug fixed to the end of the vent pipe, a vent hole connected to the vent pipe is provided in the middle of the hose plug, and when the centrifuge tube cap is fixed on the centrifuge tube body, the hose plug is in full contact with the bottom wall of the centrifuge tube body, and the hose plug cooperates with the bottom wall of the centrifuge tube body to form a seal.

8. A convenient centrifuge tube for liquid-liquid separation according to claim 7, characterized in that: An extension section for inserting into the ventilation pipe is reserved at the upper end of the hose plug, a main section adapted to the wall of the ventilation pipe is connected to the lower part of the extension section, and the bottom surface of the lower part of the main section is an arc-shaped bottom surface adapted to the bottom wall of the centrifuge tube body.

9. A convenient centrifuge tube for liquid-liquid separation according to claim 8, characterized in that: Continuous vents are provided at the centers of the extension section and the main body section.

10. The portable centrifuge tube for liquid-liquid separation according to claim 1, characterized in that: The centrifuge tube cap is connected to the centrifuge tube body through thread sealing.

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