Laboratory centrifuge tube for filtering samples

Abstract

The utility model relates to the technical field of centrifuge tubes, and provides a laboratory centrifuge tube for filtering samples, which comprises a tube body, a first filter part and a second filter part, the first filter part comprises a lantern ring and a first filter part, the lantern ring is sleeved at the port of the tube body, the first filter part comprises a first mesh enclosure and an ultrafiltration separation membrane, and the second filter part comprises a second mesh enclosure. The ultrafiltration separation membrane is arranged in the inner side of the first mesh enclosure, the lantern ring and the first mesh enclosure are integrally formed, the second filtering piece comprises a second mesh enclosure and a microfiltration separation membrane, the microfiltration separation membrane is arranged in the inner side of the second mesh enclosure, and the second mesh enclosure is connected with the first mesh enclosure; the radial gap value between the first mesh enclosure and the inner wall of the pipe body and the radial gap value between the second mesh enclosure and the ultrafiltration separation membrane on the inner side of the first mesh enclosure are both 5 mm, and the axial gap value between the second mesh enclosure and the ultrafiltration separation membrane at the bottom of the first mesh enclosure is both 10 mm. And solid substances in the first filtering piece and the second filtering piece can be conveniently obtained and independently detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal tube technical field, concretely relates to a laboratory centrifugal tube for filtering sample. BACKGROUND

[0002] The laboratory centrifugal tube is a common laboratory appliance, which is widely used in the fields of biology, chemistry and medicine, and is mainly used for sample separation, precipitation and extraction. The centrifugal tube is designed to withstand high-speed rotation in a centrifuge. The common materials of the centrifugal tube include polypropylene (PP), polystyrene (PS) and glass. The centrifugal tube is used for sample separation, precipitation and extraction, blood sample processing and chemical analysis. Among them, sample separation is used for separating different components such as cells, organelles and proteins. Precipitation and extraction are used for extracting DNA, RNA and proteins in molecular biology. Blood sample processing is used for separating plasma and blood cells and for medical diagnosis.

[0003] Publication No. CN218459556U discloses a centrifugal tube with a filtering mechanism, which includes a centrifugal tube assembly and a filter cartridge assembly. The filter cartridge assembly includes a filter sleeve, a filter membrane and a sealing cover. The lower end of the filter sleeve is threadedly connected to the upper end of the centrifugal tube assembly, and the filter membrane is fixedly connected to the inside of the filter sleeve. The filter sleeve is inserted into the opening at the upper end of the centrifugal tube assembly through threads, and then the sealing cover is opened by rotating. The culture solution with cells is injected through the upper end of the filter sleeve, and the filter membrane filters out the clustered cells. The centrifugal tube assembly is placed in a centrifuge for centrifugation. When the clustered cells are dispersed, they can be further filtered through the filter membrane to the lower part. The combination of filtering and centrifugation reduces the efficiency and utilization rate of cell separation, and effectively improves the problem that the centrifugal tube in the related art cannot combine centrifugation and filtration.

[0004] The above technical solution also has the following defects: on the one hand, it cannot simultaneously separate and filter different sizes of solid substances, and on the other hand, it is not convenient to obtain the filtered solid substances for separate detection. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a laboratory centrifugal tube for filtering sample, which aims at solving the problems of the existing centrifugal tube with filtering mechanism.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a laboratory centrifugal tube for filtering sample, comprising a tube body, further comprising:

[0007] The first filter part comprises a sleeve ring and a first filter element, the sleeve ring is sleeved at the port of the pipe body, and the first filter element comprises a first mesh cover and an ultrafiltration separation membrane which is built in the inner side of the first mesh cover, and the sleeve ring is integrally formed with the first mesh cover;

[0008] The second filter element comprises a second mesh cover and a microfiltration separation membrane which is built in the inner side of the second mesh cover, and the second mesh cover is connected with the first mesh cover, the radial gap value between the inner wall of the pipe body and the first mesh cover and the radial gap value between the inner side of the second mesh cover and the ultrafiltration separation membrane of the first mesh cover are both 5 mm, the axial gap between the second mesh cover and the ultrafiltration separation membrane of the bottom of the first mesh cover is 10 mm, and the moisture and small-particle solid substances in the sample first enter the second mesh cover through the microfiltration separation membrane under the action of gravity and centrifugal force, large-particle solid substances are filtered in the first filter element, and then the moisture and small-particle solid substances enter the pipe body through the ultrafiltration separation membrane, and small-particle solid substances are filtered in the second filter element, so that the function of filtering different sizes or volumes of solid substances in layers is realized.

[0009] As a further scheme of the utility model, the first filter part further comprises an axial limiting column and a square rod, the axial limiting column is fixedly connected at the center position of the first mesh cover, and the square rod is fixedly connected with the axial limiting column.

[0010] As a further scheme of the utility model, the second filter element further comprises a sleeve pipe, the sleeve pipe is fixedly connected at the center position of the second mesh cover, the sleeve pipe is a square hole pipe, the sleeve pipe is movably sleeved on the surface of the square rod, the second mesh cover is overlapped at the end portion of the axial limiting column, and the length of the square rod is greater than the length of the sleeve pipe.

[0011] As a further scheme of the utility model, the outer side of the pipe body is provided with a limiting block, the inner side of the sleeve ring is provided with a limiting groove, and the limiting block is embedded in the limiting groove.

[0012] As a further scheme of the utility model, the axial length of the sleeve ring along the pipe body is greater than the axial length of the first mesh cover, and the user can further install another set of filter elements on the surface of the square rod for filtering larger-particle solid substances or filtering more kinds of volume of particle solid substances at the same time.

[0013] As a further scheme of the utility model, the end portion of the sleeve pipe is provided with a clamping notch, so that the staff can hold the sleeve pipe from the square rod by hand or using tweezers.

[0014] As a further scheme of the utility model, the surface of the sleeve ring is provided with anti-skid protrusions.

[0015] The utility model discloses beneficial effect is: not only have the characteristics of filtering different size particles or volume solid material layer by layer, also have the characteristics of convenient to obtain the solid material in first filter piece and second filter piece and convenient individual detection. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 For the utility model embodiment a kind of for filtering sample laboratory centrifugal tube, perspective view.

[0017] Figure 2 For the utility model embodiment a kind of for filtering sample laboratory centrifugal tube, explosion view.

[0018] Figure 3 For the first utility model embodiment first filter portion, first perspective view.

[0019] Figure 4 For the first utility model embodiment first filter portion, second perspective view.

[0020] Figure 5 For the second utility model embodiment second filter piece, perspective view.

[0021] Figure 6 For the utility model embodiment centrifugal tube, partial plane cross-sectional view.

[0022] Figure 7 For the first utility model embodiment first filter portion and second filter piece, split schematic view.

[0023] Reference signs: 1-tube body, 11-limiting block, 2-first filter portion, 21-sleeve ring, 22-first filter piece, 23-limiting groove, 24-axial limiting column, 25-square bar, 26-anti-slip convex, 3-second filter piece, 31-sleeve, 32-clamping recess. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the utility model is further detailed below in combination with drawings and specific embodiment.It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0025] The specific implementation of the utility model is described in detail below in combination with specific embodiment.

[0026] Please refer to Figures 1 to 7 In an embodiment of the utility model, a kind of for filtering sample laboratory centrifugal tube, including tube body 1, still include:

[0027] The first filtering part 2 comprises a sleeve 21 and a first filtering piece 22, the sleeve 21 is sleeved at the port of the pipe body 1, the first filtering piece 22 comprises a first mesh cover and an ultrafiltration separation membrane, the ultrafiltration separation membrane is built in the inside of the first mesh cover, and the sleeve 21 is integrally formed with the first mesh cover;

[0028] The second filtering piece 3 comprises a second mesh cover and a microfiltration separation membrane, the microfiltration separation membrane is built in the inside of the second mesh cover, the second mesh cover is connected with the first mesh cover, the radial clearance value between the first mesh cover and the inner wall of the pipe body 1 and the radial clearance value between the second mesh cover and the ultrafiltration separation membrane in the inside of the first mesh cover are both 5mm, and the axial clearance between the second mesh cover and the ultrafiltration separation membrane at the bottom of the first mesh cover is 10mm.

[0029] Please refer to Figures 3 to 6 Furthermore, the outer side of the pipe body 1 is provided with a limiting block 11, the inner side of the sleeve 21 is provided with a limiting groove 23, and the limiting block 11 is embedded in the limiting groove 23.

[0030] Please refer to Figure 3 Furthermore, the surface of the sleeve 21 is provided with anti-skid protrusions 26.

[0031] In the embodiment of the utility model, the radial clearance value between the first mesh cover and the inner wall of the pipe body 1 and the radial clearance value between the second mesh cover and the ultrafiltration separation membrane in the inside of the first mesh cover are both 5mm, when the centrifugal tube is placed in the centrifugal machine to rotate, the filtered water and solid substance molecules can smoothly pass through the clearance and enter the second mesh cover or the pipe body 1, the axial clearance between the second mesh cover and the ultrafiltration separation membrane at the bottom of the first mesh cover is 10mm, on the one hand, the filtered water and solid substance molecules can smoothly pass through the clearance and enter the second mesh cover or the pipe body 1, on the other hand, the solid substance molecules in the second mesh cover are prevented from contacting the bottom of the first mesh cover, the anti-skid protrusions 26 are arranged, the sleeve 21 is convenient to install or disassemble, the limiting block 11 and the limiting groove 23 are axially installed and matched, when the centrifugal tube is placed in the centrifugal machine to rotate, the first filtering part 2 and the second filtering piece 3 can rotate synchronously with the pipe body 1.

[0032] Please refer to Figure 3 In one embodiment of the utility model, the first filtering part 2 further comprises an axial limiting column 24 and a square rod 25, the axial limiting column 24 is fixedly connected at the center position of the first mesh cover, and the square rod 25 is fixedly connected with the axial limiting column 24.

[0033] Please refer to Figures 3 to 7Further, the second filter 3 further comprises a sleeve 31 fixedly connected at the center of the second mesh cover, the sleeve 31 protrudes from the other side of the second mesh cover by 5mm, the sleeve 31 is a square hole pipe, the sleeve 31 movably sheaths the surface of the square rod 25, the second mesh cover overlaps the end of the axial limiting column 24, and the length of the square rod 25 is greater than the length of the sleeve 31.

[0034] Please refer to Figure 6 Further, the sleeve 31 is provided with a clamping notch 32 at the end.

[0035] Please refer to Figure 5 Further, the sleeve 31 is provided with a clamping notch 32 at the end.

[0036] In the embodiment of the utility model, since the length of the square rod 25 is greater than the length of the sleeve 31, another set of filter can be further installed on the surface of the square rod 25, which is used for filtering larger particle solid substances or filtering more kinds of particle solid substances with different volumes, the design that the sleeve 31 protrudes from the other side of the second mesh cover by 5mm and the sleeve 31 is provided with the clamping notch 32 at the end is used for preventing the second mesh cover and the first mesh cover from contacting the culture dish or the object table when the sleeve 31 and the sleeve 31 are respectively placed on the surface of the culture dish or the object table, and preventing the sample on the surface of the second mesh cover and the first mesh cover from contacting the culture dish or the object table.

[0037] Working principle: when in use, first, the sample is placed in the second filter 3, and then the centrifugal tube is placed in the centrifugal machine, the moisture and small particle solid substances in the sample first enter the second mesh cover through the microfiltration separation membrane under the gravity and centrifugal force, the large particle solid substances are filtered in the first filter 22, and then the moisture and small particle solid substances enter the pipe body 1 through the ultrafiltration separation membrane, and the small particle solid substances are filtered in the second filter 3, so that the function of filtering different particle sizes or volumes of solid substances in layers is realized.

[0038] In summary, the centrifuge tube composed of the first filter part 2, the second filter part 3 and the tube body 1 has the characteristics of filtering different size particles or volume solid substances and facilitating the acquisition of the solid substances in the first filter part 22 and the second filter part 3 and the separate detection.

[0039] (2) Since the length of the square bar 25 is greater than the length of the sleeve 31, another set of filter parts can be installed on the surface of the square bar 25 for filtering larger particles of solid substances or filtering more kinds of volume solid substances at the same time, and the combination assembly according to the actual needs is achieved.

[0040] (3) The radial gap value between the first mesh cover and the inner wall of the tube body 1 and the radial gap value between the second mesh cover and the ultrafiltration separation membrane inside the first mesh cover are both 5mm, so that the filtered water and solid substances can smoothly pass through the gap into the second mesh cover or the tube body 1. The axial gap between the second mesh cover and the ultrafiltration separation membrane at the bottom of the first mesh cover is 10mm, which facilitates the filtered water and solid substances to smoothly pass through the gap into the second mesh cover or the tube body 1 and prevents the solid substances in the second mesh cover from contacting the bottom of the first mesh cover.

[0041] For those skilled in the art, although several embodiments and examples of the present application are described, these embodiments and examples are presented as examples and are not intended to limit the scope of the application. These new embodiments can be implemented in other various ways, and various omissions, substitutions, changes can be made within the scope of the application without departing from the spirit of the application. These embodiments and their modifications are included in the scope and spirit of the application, and are included in the scope of the application and its equivalents as recited in the claims.

[0042] In addition, it should be understood that although the present application is described in the form of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each example can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A laboratory centrifuge tube for filtering a sample comprising a tube body (1), characterized in that, Also include: The first filter part (2) includes a sleeve (21) and a first filter (22), the sleeve (21) is sleeved at the port of the pipe body (1), the first filter (22) includes a first mesh cover and an ultrafiltration separation membrane, the ultrafiltration separation membrane is built-in inside the first mesh cover, the sleeve (21) is integrally formed with the first mesh cover; The second filter part (3) includes a second mesh cover and a microfiltration separation membrane, the microfiltration separation membrane is built-in inside the second mesh cover, the second mesh cover is connected with the first mesh cover, the radial gap value between the first mesh cover and the inner wall of the pipe body (1) and the radial gap value between the second mesh cover and the ultrafiltration separation membrane inside the first mesh cover are both 5mm, the axial gap between the second mesh cover and the ultrafiltration separation membrane at the bottom of the first mesh cover is 10mm.

2. A laboratory centrifuge tube for filtering a sample according to claim 1, wherein, The first filter part (2) further includes an axial limiting column (24) and a square rod (25), the axial limiting column (24) is fixedly connected at the center position of the first mesh cover, and the square rod (25) is fixedly connected with the axial limiting column (24).

3. A laboratory centrifuge tube for filtering a sample according to claim 2, wherein, The second filter part (3) further includes a sleeve (31), the sleeve (31) is fixedly connected at the center position of the second mesh cover, the sleeve (31) is a square hole pipe, the sleeve (31) is movably sleeved on the surface of the square rod (25), the second mesh cover is overlapped at the end of the axial limiting column (24), and the length of the square rod (25) is greater than that of the sleeve (31).

4. The laboratory centrifuge tube for filtering a sample of claim 1, wherein, The outer side of the pipe body (1) is provided with a limiting block (11), the inner side of the sleeve (21) is provided with a limiting groove (23), and the limiting block (11) is embedded in the limiting groove (23).

5. The laboratory centrifuge tube for filtering a sample of claim 1, wherein, The axial length of the sleeve (21) along the pipe body (1) is greater than that of the first mesh cover.

6. A laboratory centrifuge tube for filtering a sample according to claim 3, wherein, The end of the sleeve (31) is provided with a clamping notch (32).

7. The laboratory centrifuge tube for filtering a sample of claim 1, wherein, The surface of the sleeve (21) is provided with anti-skid protrusions (26).

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