Ultrafiltration structure of centrifugal tube

Abstract

The utility model discloses an ultrafiltration structure of a centrifuge tube, which relates to the technical field of filtration, and comprises a vertical tube, a bearing sleeve, a bearing tube and an ultrafiltration membrane, the lower part of the inner wall of the vertical tube is provided with a supporting edge, the upper part of the inner wall of the vertical tube is provided with an internal thread, the bearing sleeve is in running fit with the inner cavity of the vertical tube, the bearing sleeve is lapped on the supporting edge, and the middle part of the bearing sleeve is provided with an assembly groove; the bearing pipe comprises a liquid containing part and a filtering part which are connected, the liquid containing part is erected on the bearing sleeve, a limiting ring is arranged at the top of the liquid containing part, external threads are arranged on the lower portion of the outer wall of the liquid containing part and matched with the internal threads, the filtering part is inserted into the assembling groove, and an ultrafiltration membrane is arranged between the side face of the filtering part and the side face of the assembling groove in a clamped mode. The bearing pipe and the bearing sleeve are stably assembled together through the vertical pipe, and when the bearing pipe is taken out, the vertical pipe and the bearing sleeve are taken out along with the bearing pipe, so that the bearing pipe can be prevented from toppling over during placement, macromolecular samples are prevented from spilling out of the bearing pipe, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, in particular to an ultrafiltration structure of a centrifuge tube. Background Art

[0002] Ultrafiltration centrifuge tubes have rapid ultrafiltration capabilities, can achieve higher concentration factors, and are easy to recover concentrates from diluents and complex sample combinations, so they are widely used in the field of biofiltration.

[0003] For example, in the patent with the publication number CN218654547U, "An ultrafiltration centrifuge tube" is disclosed. Figure 1 and Figure 2 As shown, the patent includes an outer tube 1, a sleeve 2, a support tube 3, and an ultrafiltration membrane 4. The outer tube 1 is formed with an assembly cavity, and the inner wall of the outer tube 1 protrudes toward the assembly cavity and forms a stopper 11 integrally formed with the outer tube 1. The sleeve 2 is arranged in the assembly cavity and is mounted on the stopper 11, and an assembly groove 21 is opened in the middle of the sleeve 2. The support tube 3 is arranged in the assembly cavity, and the support tube 3 includes a liquid-filling part 31 and a filter part 32 connected in sequence from top to bottom. The liquid-filling part 31 is used to hold the filtered raw liquid, and the liquid-filling part 31 is mounted on the sleeve 2. A limiting ring 34 is provided on the top of the liquid-filling part 31, and the limiting ring 34 is mounted on the top of the outer tube 1. The filter part 32 is inserted into the assembly groove 21, and a filter hole 33 is provided on the side of the filter part 32. The ultrafiltration membrane 4 is used to block the filter hole 33. After the filter part 32 is inserted into the assembly groove 21, it clamps and fixes the ultrafiltration membrane 4 with the side of the assembly groove 21.

[0004] In the above patent, the sleeve 2, the support tube 3, and the ultrafiltration membrane 4 constitute the ultrafiltration structure of the centrifuge tube.

[0005] After the centrifugal filtration is completed, the support tube 3 contains the macromolecular sample and the outer tube 1 contains the small molecule sample. The support tube 3 and the outer tube 1 need to be separated and set aside for inspection respectively.

[0006] Since the liquid-filling part 31 of the support tube 3 overlaps with the socket 2, and the filter part 32 of the support tube 3 is plugged into the assembly groove 21 of the socket 2, there is no reliable connection between the support tube 3 and the socket 2. When the support tube 3 needs to be taken out from the outer tube 1, the socket 2 cannot be taken out together with the support tube 3; or, the socket 2 is taken out together with the support tube 3 by virtue of the friction resistance of the plug-in fit between the assembly groove 21 and the filter part 32 of the support tube 3, but the socket 2 may accidentally fall off the support tube 3 due to reasons such as the large range of motion of the inspector.

[0007] Since the filtering part 32 of the support tube 3 is smaller than the liquid containing part 31, when the support tube 3 taken out from the outer tube 1 is placed on the workbench, the support tube 3 is difficult to stabilize and is easy to tip over, causing the macromolecular sample to spill out of the support tube 3, making it inconvenient to use. Utility Model Content

[0008] In view of the above-mentioned deficiencies in the prior art, the utility model proposes an ultrafiltration structure of a centrifuge tube. The utility model utilizes a stand pipe to stably assemble a support tube and a support sleeve together. When the support tube is taken out, the stand pipe and the support sleeve are taken out together with the support tube, so that when it is placed, the support tube can be prevented from tipping over and the macromolecular sample can be prevented from spilling out of the support tube, thereby facilitating use.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0010] The invention discloses an ultrafiltration structure of a centrifuge tube, comprising a stand pipe, a socket, a socket pipe and an ultrafiltration membrane. The lower part of the inner wall of the stand pipe is provided with a supporting edge, the upper part of the inner wall of the stand pipe is provided with an internal thread, the socket sleeve is rotatably matched with the inner cavity of the stand pipe, the socket sleeve is mounted on the supporting edge, the middle part of the socket sleeve is provided with an assembly groove, the socket pipe comprises a liquid filling part and a filtering part connected to each other, the liquid filling part is mounted on the socket, a limiting ring is provided on the top of the liquid filling part, the lower part of the outer wall of the liquid filling part is provided with an external thread, the external thread cooperates with the internal thread, the filtering part is inserted in the assembly groove, and an ultrafiltration membrane is sandwiched between the side of the filtering part and the side of the assembly groove.

[0011] Furthermore, a boss is provided at the lower part of the liquid containing part, the side wall of the boss is provided with the external thread, and the outer wall of the liquid containing part is flush with the outer wall of the vertical pipe.

[0012] Furthermore, the bottom surface of the vertical pipe is lower than the bottom surface of the supporting edge.

[0013] Furthermore, the bottom surface of the sleeve is provided with a plurality of hollow grooves.

[0014] Furthermore, the outer wall of the liquid containing portion is provided with scales.

[0015] Furthermore, the outer wall of the liquid-containing portion is provided with a first resistance-increasing pattern, and the outer wall of the vertical pipe is provided with a second resistance-increasing pattern.

[0016] The utility model has the beneficial effects:

[0017] 1. After completing the centrifugal ultrafiltration, if you want to take out the support tube from the centrifuge tube, because the support tube is threadedly connected to the standpipe, and the sleeve is clamped between the support edge and the support tube, the support tube and the sleeve can be stably assembled together through the standpipe. When taking out the support tube, the standpipe and the sleeve can be taken out together with the support tube to prevent the sleeve from accidentally detaching from the support tube. When the taken-out support tube is placed on the workbench, the standpipe and the sleeve can lower the center of gravity of the support tube, and the standpipe occupies a larger area, which can stabilize the support tube, prevent the support tube from tipping over, and prevent large molecular samples from spilling out of the support tube, making it easy to use.

[0018] 2. Because the bearing pipe and the bearing sleeve can be stably assembled together through the riser, there is no need to set a stop block in the outer pipe of the background technology. By using the limit ring at the upper end of the bearing pipe and setting it on the upper end of the outer pipe, the bearing pipe, the bearing sleeve and the riser can be prevented from falling downward, making the structure of the outer pipe simpler and easier to process and manufacture.

[0019] 3. Because the bottom surface of the vertical pipe is lower than the bottom surface of the supporting edge, the supporting edge can be raised, and then the socket, the socket pipe, the assembly groove of the socket and the ultrafiltration membrane clamped and fixed by the filter part in the socket pipe can be raised. When the ultrafiltration structure is placed on the workbench as a whole, it can prevent the workbench from contaminating the ultrafiltration membrane and the large molecular samples intercepted by the ultrafiltration membrane, which is beneficial to improve the accuracy of the test samples.

[0020] 4. Because the bottom surface of the sleeve is provided with a hollow groove, the weight of the sleeve can be reduced, and then the weight of the entire ultrafiltration structure can be reduced, making the ultrafiltration structure lighter.

[0021] 5. Because the outer wall of the liquid-filling part is provided with scales, it is convenient to observe the amount of the macromolecular sample in the liquid-filling part, and it is convenient for inspection and use.

[0022] 6. Because the outer wall of the liquid-filling part is provided with a first resistance-increasing pattern and the outer wall of the vertical tube is provided with a second resistance-increasing pattern, when screwing the supporting tube, the friction between the hand and the liquid-filling part of the supporting tube and the vertical tube can be increased, preventing the hand from slipping during the screwing process, which is beneficial to improving the operational stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the background technology Figure 1 ;

[0024] Figure 2 It is a structural diagram of the background technology Figure 2 ;

[0025] Figure 3 It is a top view of the socket;

[0026] Figure 4 It is the three-dimensional Figure 1 ;

[0027] Figure 5 It is the three-dimensional Figure 2 ;

[0028] Figure 6 It is the main view of the bearing pipe;

[0029] Figure 7 It is a three-dimensional tube Figure 1 ;

[0030] Figure 8 It is a three-dimensional tube Figure 2 ;

[0031] Fig. 9 It is the three-dimensional structure of the riser. Figure 1 ;

[0032] Fig.10 It is the three-dimensional structure of the riser. Figure 2 ;

[0033] Fig.11 It is a disassembled stereoscopic diagram of an ultrafiltration structure of a centrifuge tube;

[0034] Fig.12 It is a schematic diagram of the assembly of an ultrafiltration structure of a centrifuge tube.

[0035] Description of reference numerals:

[0036] 1-outer tube, 11-stop block,

[0037] 2-sleeve, 21-assembly groove, 22-hollow groove,

[0038] 3-supporting pipe, 31-liquid filling part, 32-filtering part, 33-filtering hole, 34-limiting ring, 35-external thread, 36-boss, 37-scale, 38-first resistance increasing pattern,

[0039] 4-Ultrafiltration membrane,

[0040] 5-vertical pipe, 51-support edge, 52-internal thread, 53-second resistance increasing pattern. DETAILED DESCRIPTION

[0041] In order to better understand the present invention, the present invention is further described below in conjunction with the accompanying drawings. It is worth noting that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention 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 the present invention.

[0042] Example:

[0043] like Figure 3-Figure 12 As shown, an ultrafiltration structure of a centrifuge tube includes a standpipe 5, a sleeve 2, a support tube 3, and an ultrafiltration membrane 4.

[0044] like Fig.10 As shown, a support edge 51 is provided at the lower portion of the inner wall of the vertical pipe 5. The support edge 51 and the vertical pipe 5 are an integral structure, and the bottom surface of the vertical pipe 5 is lower than the bottom surface of the support edge 51. Fig. 9 and Fig.10 As shown, an internal thread 52 is provided on the upper portion of the inner wall of the riser 5, and a second resistance-increasing pattern 53 is provided on the outer wall of the riser 5. The second resistance-increasing pattern 53 adopts a plurality of vertical groove structures.

[0045] like Figure 3 , Figure 4 , Figure 5As shown, a mounting groove 21 is provided in the middle of the sleeve 2. A plurality of hollow grooves 22 are provided on the bottom surface of the sleeve 2.

[0046] like Figure 6 , Figure 7 , Figure 8 As shown, the support pipe 3 includes a liquid-filling portion 31 and a filter portion 32 connected to each other. A filter hole 33 is provided on the side of the filter portion 32. A limit ring 34 is provided on the top of the liquid-filling portion 31, a boss 36 is provided on the lower part of the liquid-filling portion 31, and an external thread 35 is provided on the side wall of the boss 36. The external thread 35 is used to cooperate with the internal thread 52. The outer wall of the liquid-filling portion 31 is not only provided with a scale 37, but also provided with a first resistance-increasing pattern 38. The first resistance-increasing pattern 38 adopts a plurality of vertical groove structures.

[0047] like Fig.11 and Fig.12 As shown, when the ultrafiltration structure of this embodiment needs to be assembled, (1) the filter part 32 in the support tube 3 is inserted from top to bottom into the assembly groove 21 of the sleeve 2, so that the side of the filter part 32 and the side of the assembly groove 21 clamp and fix the ultrafiltration membrane 4; (2) the sleeve 2 and the support tube 3 that are plugged together are inserted from top to bottom into the stand pipe 5. When the external thread 35 at the lower part of the outer side of the support tube 3 is close to the internal thread 52 of the stand pipe 5, the support tube 3 needs to be screwed and the support tube 3 is screwed into the stand pipe 5. When the support tube 3 is screwed, the sleeve 2 rotates together with the sleeve 3 in the inner cavity of the stand pipe 5 until the bottom surface of the sleeve 2 is placed on the upper surface of the support edge 51. At this time, the boss 36 at the lower part of the liquid containing part 31 is placed on the upper surface of the sleeve 2, and the outer wall of the liquid containing part 31 is flush with the outer wall of the stand pipe 5. See Fig.12 .

[0048] When using the ultrafiltration structure of this embodiment, (1) the ultrafiltration structure is inserted from top to bottom into the centrifuge tube until the limiting ring 34 is placed on the tube mouth of the centrifuge tube; (2) the sample to be ultrafiltered is poured into the support tube 3, and the sealing cover is threadedly connected to the tube mouth of the centrifuge tube, and the limiting ring 34 is pressed by the sealing cover to fix the ultrafiltration structure in the centrifuge tube; (3) the ultrafiltration structure is placed in a centrifugal device for centrifugal ultrafiltration.

[0049] After completing the centrifugal ultrafiltration, if you want to take out the supporting tube 3 from the centrifuge tube, because the supporting tube 3 is threadedly connected to the vertical tube 5, and the sleeve 2 is clamped between the supporting edge 51 and the supporting tube 3, the supporting tube 3 and the sleeve 2 can be stably assembled together through the vertical tube 5. When taking out the supporting tube 3, the vertical tube 5 and the sleeve 2 can be taken out together with the supporting tube 3 to prevent the sleeve 2 from accidentally detaching from the supporting tube 3. When the taken out supporting tube 3 is placed on the workbench, the vertical tube 5 and the sleeve 2 can lower the center of gravity of the supporting tube 3, and the vertical tube 5 has a larger footprint, which can stabilize the supporting tube 3, prevent the supporting tube 3 from tipping over, and prevent the large molecular sample from spilling out of the supporting tube 3, which is easy to use.

[0050] Furthermore, because the supporting pipe 3 and the socket 2 can be stably assembled together through the riser 5, there is no need to provide a stop block 11 in the outer pipe 1 of the background technology. By utilizing the limit ring 34 at the upper end of the supporting pipe 3 and extending it on the upper end of the outer pipe 1, the supporting pipe 3, the socket 2 and the riser 5 can be prevented from falling downward, thereby making the structure of the outer pipe 1 simpler and easier to process and manufacture.

[0051] Because the bottom surface of the vertical pipe 5 is lower than the bottom surface of the supporting edge 51, the supporting edge 51 can be raised, and then the sleeve 2, the supporting tube 3, the assembly groove 21 of the sleeve 2 and the filter part 32 in the supporting tube 3 can be raised to clamp and fix the ultrafiltration membrane 4. When the ultrafiltration structure is placed on the workbench as a whole, it can prevent the workbench from contaminating the ultrafiltration membrane 4 and the large molecule samples intercepted by the ultrafiltration membrane 4, which is beneficial to improve the accuracy of the test samples.

[0052] Since the bottom surface of the sleeve 2 is provided with a hollow groove 22, the weight of the sleeve 2 can be reduced, and then the weight of the entire ultrafiltration structure can be reduced, making the ultrafiltration structure lighter.

[0053] Because the outer wall of the liquid containing part 31 is provided with a scale 37, the amount of the macromolecular sample in the liquid containing part 31 can be conveniently observed, and it is convenient for inspection and use.

[0054] Because the outer wall of the liquid filling part 31 is provided with the first resistance increasing pattern 38 and the outer wall of the vertical tube 5 is provided with the second resistance increasing pattern 53, when screwing the supporting tube 3, the friction between the hand and the liquid filling part 31 of the supporting tube 3 and the vertical tube 5 can be increased to prevent the hand from slipping during the screwing process, which is beneficial to improving the operational stability.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An ultrafiltration structure of a centrifuge tube, comprising a sleeve, a pipe, and an ultrafiltration membrane, wherein an assembly groove is provided in the middle of the sleeve, the pipe comprises a liquid-filling part and a filtering part connected to each other, a limiting ring is provided on the top of the liquid-filling part, the liquid-filling part is mounted on the sleeve, the filtering part is inserted in the assembly groove, an ultrafiltration membrane is sandwiched between the side of the filtering part and the side of the assembly groove, and characterized in that: It also includes a stand pipe, the lower part of the inner wall of the stand pipe is provided with a supporting edge, the upper part of the inner wall of the stand pipe is provided with an internal thread, the socket and the inner cavity of the stand pipe are rotatably matched, the socket is placed on the supporting edge, the lower part of the outer wall of the liquid-containing part is provided with an external thread, and the external thread cooperates with the internal thread.

2. The ultrafiltration structure of a centrifuge tube according to claim 1, characterized in that: A boss is provided at the lower part of the liquid containing part, the side wall of the boss is provided with the external thread, and the outer wall of the liquid containing part is flush with the outer wall of the vertical pipe.

3. The ultrafiltration structure of a centrifuge tube according to claim 1, characterized in that: The bottom surface of the vertical pipe is lower than the bottom surface of the supporting edge.

4. The ultrafiltration structure of a centrifuge tube according to claim 1, characterized in that: The bottom surface of the sleeve is provided with a plurality of hollow grooves.

5. The ultrafiltration structure of a centrifuge tube according to claim 1, characterized in that: The outer wall of the liquid containing part is provided with scales.

6. The ultrafiltration structure of a centrifuge tube according to claim 5, characterized in that: The outer wall of the liquid-containing portion is provided with a first resistance-increasing pattern, and the outer wall of the vertical pipe is provided with a second resistance-increasing pattern.

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