Leakage-proof ultrafiltration tube
By setting anti-leakage structures such as annular plates, annular water retaining strips and annular sealing rings in the ultrafiltration tube, the problem of solution leakage during high-speed centrifugation or heating is solved, and efficient and reliable separation effects and environmental protection are achieved.
Patent Information
- Application Number
- CN202422346117.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-09-25
AI Technical Summary
Existing ultrafiltration tubes are prone to solution leakage during high-speed centrifugation or heating, resulting in solution loss and contamination.
A leak-proof ultrafiltration tube is designed. By arranging leak-proof structures such as an annular plate, an annular water retaining strip, an annular sealing ring and an annular waterproof ring between the cover body and the centrifuge tube, the sealing is ensured and the solution leakage is prevented.
It improves the sealing of the ultrafiltration tube, avoids solution leakage, protects the environment, extends the service life, improves separation efficiency and accuracy, and reduces maintenance costs.
Smart Images
Figure CN223300010U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technology of a laboratory separation device, and more specifically, to an anti-leakage ultrafiltration tube. Background Technique
[0002] An ultrafiltration tube is a small laboratory instrument, which is mainly used for the separation and preparation of various biological samples by being used in conjunction with a centrifuge, and has a very wide application in the field of biological science, especially in the research fields of biochemistry and molecular biology.
[0003] In the existing structure of an ultrafiltration tube, the cover body and the centrifuge tube are made to be sealed by means of interference fit. However, when the ultrafiltration tube is centrifuged at high speed by the centrifuge for separation, there may be a phenomenon of solution leakage in the ultrafiltration tube. In addition, sometimes the solution in the ultrafiltration tube needs to be heated. Under the dual effects of heat deformation and evaporation expansion of the solution in the centrifuge tube, in the light case, it will lead to solution leakage, and in the severe case, the cover body will automatically pop open, resulting in the loss and pollution of the solution. Content of the Utility Model
[0004] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide an anti-leakage ultrafiltration tube.
[0005] To achieve the above purpose, the utility model provides the following technical solution: An anti-leakage ultrafiltration tube, including a centrifuge tube, a filtering device inserted into the centrifuge tube, and a cover body threadedly connected to the centrifuge tube for fixing the filtering device in the centrifuge tube. A stepped surface for placing the filtering device is provided in the centrifuge tube. A circular groove is opened in the cover body, and an integrally formed annular plate is coaxially arranged in the circular groove, so that an annular groove for fixedly connecting with the centrifuge tube is formed between the cover body and the annular plate. An external thread is provided on the outer peripheral side of the top of the centrifuge tube, and an internal thread adapted to the external thread is provided on the cover body; An anti-leakage structure is provided between the outer peripheral side of the annular plate and the inner peripheral side of the top of the centrifuge tube.
[0006] The utility model is further arranged as: The anti-leakage structure includes a first flange provided on the outer peripheral side of the bottom of the annular plate and integrally formed with the annular plate, and there is a gap between the first flange and the centrifuge tube. An annular water blocking strip with a U-shaped cross section is sleeved on the first flange.
[0007] The utility model is further arranged as: The anti-leakage structure further includes a second flange provided on the outer peripheral side of the top of the annular plate and integrally formed with the annular plate, and there is a gap between the second flange and the centrifuge tube. A first annular groove and a second annular groove are parallelly opened on the second flange.
[0008] The present utility model is further configured as follows: the cross-section of the first annular groove is arc-shaped, and an annular sealing ring I is fixedly arranged in the first annular groove; the cross-section of the second annular groove is in a shape of a reversed C, and a clamping groove with a right trapezoidal cross-section is formed on the upper side wall in the second annular groove. An annular sealing ring II is arranged in the second annular groove, and a clamping portion which is adapted to the clamping groove and integrally formed is arranged on the annular sealing ring II.
[0009] The present utility model is further configured as follows: an annular waterproof ring is arranged on the connection surface between the centrifuge tube and the annular groove. The annular waterproof ring is located on the top surface of the centrifuge tube or the top surface of the annular groove, and the annular waterproof ring is located between the centrifuge tube and the annular groove.
[0010] The present utility model is further configured as follows: the height of the annular plate is equal to the difference between the height of the step surface and the height of the upper part of the filtering device, so that when the cover body is completely sealed with the centrifuge tube, the bottom surface of the annular plate abuts against the bottom surface of the filtering device to fix the filtering device in the centrifuge tube.
[0011] The present utility model is further configured as follows: the annular water retaining strip, the annular sealing ring I, the annular sealing ring II, and the annular waterproof ring are made of elastic materials.
[0012] The beneficial effects of the present utility model are as follows:
[0013] 1. Compared with the prior art, the leak-proof ultrafiltration tube of the present utility model has a very high sealing performance through the setting of the leak-proof structure. When the centrifuge performs high-speed centrifugal separation on the solution in the ultrafiltration tube, the solution in the ultrafiltration tube will not leak. In addition, even when the solution in the ultrafiltration tube needs to be heated, neither the heat-deformed centrifuge tube nor the evaporated and expanded solution in the centrifuge tube will leak or even cause the cover body to bounce open.
[0014] 2. The leak-proof ultrafiltration tube of the present utility model can further improve the sealing performance of the ultrafiltration tube by arranging an annular waterproof ring on the connection surface between the centrifuge tube and the annular groove. The ultrafiltration tube with good sealing performance can effectively prevent the leakage of liquid, ensure that the liquid in the separation process will not overflow or pollute the environment. This not only avoids the waste of resources, but also protects the surrounding environment from potential pollution; secondly, the good sealing performance stabilizes the pressure and avoids the reduction of separation efficiency caused by pressure fluctuation. The stable pressure condition helps the ultrafiltration membrane to be in the best working state, thereby improving the treatment effect and filtration accuracy; in addition, the ultrafiltration tube with good sealing performance can prevent external substances from entering the filtering device, reduce the interference of pollutants, and protect the normal operation inside the centrifuge tube. This protection not only extends the service life, but also reduces the time and cost caused by maintenance and replacement of parts; in short, the good sealing performance of the ultrafiltration tube can significantly improve the reliability, separation efficiency and economy, which is the key factor to achieve efficient separation treatment.
[0015] 3. In the present invention, when performing separation work, the filter device is first placed on the step surface in the centrifuge tube, and then the solution to be separated is added to the filter device, and finally the cover body and the centrifuge tube are tightened, so that the annular water retaining strip of the first flange of the annular plate, the annular sealing ring 1 and the annular sealing ring 2 on the second flange of the annular plate are in contact with the inner circumference of the top of the centrifuge tube to form a seal, and the cover body and the centrifuge tube are sealed by the annular waterproof ring. In addition, when the cover body and the centrifuge tube are completely sealed, the annular plate can fix the filter device in the centrifuge tube; after the fixation is completed, the ultrafiltration tube is placed in the centrifuge and the separation work can be carried out.
[0016] 4. The utility model has a simple and reasonable structure, is easy to manufacture, and is easy to operate. It avoids the defects of the existing technology and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a structural diagram of the leak-proof ultrafiltration tube of the utility model.
[0018] Figure 2 This is an exploded view of the leak-proof ultrafiltration tube of the utility model.
[0019] Figure 3 This is a partial cross-sectional structural diagram of the leak-proof ultrafiltration tube of the utility model.
[0020] Figure 1-3 Figure numerals: 1. centrifuge tube; 2. filter device; 3. cover body; 4. step surface; 5. circular groove; 6. annular plate; 7. annular groove; 8. first flange; 9. annular water retaining strip; 10. second flange; 11. first annular groove; 12. second annular groove; 13. annular sealing ring 1; 14. clamping groove; 15. annular sealing ring 2; 16. clamping part; 17. annular waterproof ring. DETAILED DESCRIPTION
[0021] Reference Figure 1-3 The leak-proof ultrafiltration tube of the utility model is further described in detail.
[0022] For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to illustrate the relationship between one element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.
[0023] Moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.
[0024] Figures 1 to 3 A leak-proof ultrafiltration tube shown includes a centrifuge tube 1, a filtering device 2 inserted into the centrifuge tube 1, and a cover 3 threadedly connected to the centrifuge tube 1 for fixing the filtering device 2 inside the centrifuge tube 1. A stepped surface 4 for placing the filtering device 2 is provided inside the centrifuge tube 1. A circular groove 5 is formed inside the cover 3. An integrally formed annular plate 6 is coaxially arranged inside the circular groove 5, so that an annular groove 7 for fixedly connecting with the centrifuge tube 1 is formed between the cover 3 and the annular plate 6. An external thread is provided on the outer peripheral side of the top of the centrifuge tube 1, and an internal thread adapted to the external thread is provided on the cover 3; A leak-proof structure is provided between the outer peripheral side of the annular plate 6 and the inner peripheral side of the top of the centrifuge tube 1; Compared with the prior art, the leak-proof ultrafiltration tube of the present utility model has extremely high sealing performance by setting the leak-proof structure. When the centrifuge performs high-speed centrifugal separation on the solution in the ultrafiltration tube, the solution in the ultrafiltration tube will not leak. In addition, even when the solution in the ultrafiltration tube needs to be heated, neither the centrifugal tube 1 deformed by heat nor the solution in the centrifugal tube 1 evaporated and expanded will leak or even cause the cover 3 to pop open.
[0025] The leak-proof structure includes a first flange 8 provided on the outer peripheral side of the bottom of the annular plate 6 and integrally formed with the annular plate 6, and there is a gap between the first flange 8 and the centrifuge tube 1. An annular water-blocking strip 9 with a U-shaped cross-section is sleeved on the first flange 8; The leak-proof structure further includes a second flange 10 provided on the outer peripheral side of the top of the annular plate 6 and integrally formed with the annular plate 6, and there is a gap between the second flange 10 and the centrifuge tube 1. A first annular groove 11 and a second annular groove 12 are parallelly formed on the second flange 10; The cross-section of the first annular groove 11 is arc-shaped, and an annular sealing ring 13 is fixedly arranged inside the first annular groove 11; The cross-section of the second annular groove 12 is U-shaped, and a clamping groove 14 with a right trapezoidal cross-section is formed on the upper side wall inside the second annular groove 12. An annular sealing ring 15 is arranged inside the second annular groove 12, and a clamping portion 16 adapted to the clamping groove 14 and integrally formed is provided on the annular sealing ring 15; It can prevent the ultrafiltration tube from leaking.
[0026] An annular waterproof ring 17 is provided on the connecting surface of the centrifuge tube 1 and the annular groove 7. The annular waterproof ring 17 is located on the top surface of the centrifuge tube 1 or the top surface of the annular groove 7, and the annular waterproof ring 17 is located between the centrifuge tube 1 and the annular groove 7. The leak-proof ultrafiltration tube of the utility model can further improve the sealing performance of the ultrafiltration tube by providing the annular waterproof ring 17 on the connecting surface of the centrifuge tube 1 and the annular groove 7. The ultrafiltration tube with good sealing performance can effectively prevent liquid leakage and ensure that the liquid in the separation process will not overflow or pollute the environment, which not only avoids waste of resources, but also protects the surrounding environment from potential pollution. Secondly, good sealing performance stabilizes pressure and avoids the reduction of separation efficiency due to pressure fluctuations. Stable pressure conditions contribute to the optimal working state of the ultrafiltration membrane, thereby improving the treatment effect and filtration accuracy; in addition, the ultrafiltration tube with good sealing performance can prevent external substances from entering the filter device 2, reduce the interference of pollutants, and protect the normal operation of the centrifuge tube 1. This protection not only extends the service life, but also reduces the time and cost generated by maintenance and replacement of parts; in short, the good sealing performance of the ultrafiltration tube can significantly improve the reliability, separation efficiency and economy, and is a key factor in achieving efficient separation treatment.
[0027] The height of the annular plate 6 is equal to the difference between the height of the step surface 4 and the height of the upper part of the filter device 2, so that when the cover body 3 and the centrifuge tube 1 are completely sealed, the bottom surface of the annular plate 6 contacts the bottom surface of the filter device 2 to fix the filter device 2 in the centrifuge tube 1; it is convenient to fix the filter device 2 in the centrifuge tube 1, and prevent the filter device 2 from moving during the separation work, thereby affecting the separation work.
[0028] The annular water retaining strip 9, the annular sealing ring 13, the annular sealing ring 2 15 and the annular waterproof ring 17 are made of elastic materials to facilitate sealing.
[0029] In the utility model, when performing separation work, the filter device 2 is first placed on the step surface 4 in the centrifuge tube 1, and then the solution to be separated is added to the filter device 2, and finally the cover body 3 and the centrifuge tube 1 are tightened, so that the annular water retaining strip 9 of the first flange 8 on the annular plate 6, the annular sealing ring 13 and the annular sealing ring 2 15 on the second flange 10 on the annular plate 6 are in contact with the inner peripheral side of the top of the centrifuge tube 1 to form a seal, and the cover body 3 and the centrifuge tube 1 are sealed by the annular waterproof ring 17. In addition, when the cover body 3 and the centrifuge tube 1 are completely sealed, the annular plate 6 can fix the filter device 2 in the centrifuge tube 1; after the fixation is completed, the ultrafiltration tube is placed in the centrifuge to perform the separation work; the utility model has a simple and reasonable structure, is easy to manufacture, is easy to operate, avoids the defects in the prior art, and is suitable for popularization and implementation.
[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.
Claims
1. A leakproof ultrafiltration tube, comprising a centrifuge tube (1), a filter device (2) inserted into the centrifuge tube (1), and a cover (3) threadedly connected to the centrifuge tube (1) for fixing the filter device (2) in the centrifuge tube (1), characterized in that: A step surface (4) for placing a filtering device (2) is provided inside the centrifuge tube (1). A circular groove (5) is formed inside the cover body (3). An integrally formed annular plate (6) is coaxially arranged inside the circular groove (5), so that an annular groove (7) for fixedly connecting with the centrifuge tube (1) is formed between the cover body (3) and the annular plate (6). An external thread is provided on the outer peripheral side of the top of the centrifuge tube (1), and an internal thread adapted to the external thread is provided on the cover body (3); A leak-proof structure is provided between the outer peripheral side of the annular plate (6) and the inner peripheral side of the top of the centrifuge tube (1).
2. A leak-proof ultrafiltration tube according to claim 1, characterized in that: The leak-proof structure includes a first flange (8) provided on the outer peripheral side of the bottom of the annular plate (6) and integrally formed with the annular plate (6), and there is a gap between the first flange (and the centrifuge tube (1). An annular water-blocking strip (9) with a U-shaped cross section is sleeved on the first flange (8).
3. A leak-proof ultrafiltration tube according to claim 2, characterized in that: The leak-proof structure further includes a second flange (10) provided on the outer peripheral side of the top of the annular plate (6) and integrally formed with the annular plate (6), and there is a gap between the second flange (10) and the centrifuge tube (1). A first annular groove (11) and a second annular groove (12) are parallelly formed on the second flange (10).
4. The leak-proof ultrafiltration tube according to claim 3, characterized in that: The cross section of the first annular groove (11) is arc-shaped, and an annular sealing ring one (13) is fixedly arranged inside the first annular groove (11); The cross section of the second annular groove (12) is U-shaped, and a clamping groove (14) with a right trapezoidal cross section is formed on the upper side wall inside the second annular groove (12). An annular sealing ring two (15) is arranged inside the second annular groove (12), and a clamping portion (16) adapted to the clamping groove (14) and integrally formed is provided on the annular sealing ring two (15).
5. The leak-proof ultrafiltration tube according to claim 1, characterized in that: An annular waterproof ring (17) is provided on the connecting surface between the centrifuge tube (1) and the annular groove (7). The annular waterproof ring (17) is located on the top surface of the centrifuge tube (1) or the top surface of the annular groove (7), and the annular waterproof ring (17) is located between the centrifuge tube (1) and the annular groove (7).
6. The leakproof ultrafiltration tube according to claim 1, characterized in that: The height of the annular plate (6) is equal to the difference between the height of the step surface (4) and the height of the upper part of the filtering device (2), so that when the cover body (3) and the centrifuge tube (1) are completely sealed, the bottom surface of the annular plate (6) abuts against the bottom surface of the filtering device (2) to fix the filtering device (2) inside the centrifuge tube (1).
7. The leak-proof ultrafiltration tube according to claim 2, characterized in that: The annular water-blocking strip (9), the annular sealing ring one (13), the annular sealing ring two (15), and the annular waterproof ring (17) are made of elastic materials.