An ultrafiltration centrifuge tube

Abstract

This utility model discloses an ultrafiltration centrifuge tube, including an outer tube, an inner tube, a filter membrane, and a cap. The cap is screwed into a threaded section on the upper outer circumference of the outer tube. The inner tube is located inside the outer tube and is fitted with the shaft hole of the outer tube with a clearance fit. The upper end of the inner tube has a stepped surface, which is then fitted to the upper end surface of the outer tube and locked tightly by the cap. The lower end of the inner tube has an array of several filtrate holes. A filter membrane is placed on the inner wall facing the filtrate hole area. A gap is left between the outer wall of the inner tube and the inner wall of the outer tube to collect the filtered reagent. The specially designed inner tube of the ultrafiltration centrifuge tube, and the filter membrane placed on the inner wall of the inner tube, can effectively place the solid-liquid mixture in the inner tube and quickly and efficiently filter out the diluted reagent under the action of the centrifuge. The inner tube adopts a separate design, which is assembled into one piece after the filter membrane is bonded, simplifying the process and reducing costs. The flat design of the inner tube can maintain the stability and reliability of the filter membrane structure during pressure centrifugation, making it durable.

Description

Technical Field

[0001] This utility model relates to the field of filtration equipment technology, specifically to an ultrafiltration centrifuge tube. Background Technology

[0002] In fields such as biomedicine and medical identification, the testing of liquid drugs and reagents is frequently required. When testing liquid reagents, solid-liquid separation and filtration are essential. Centrifuges are the most widely used solid-liquid separation and reagent mixing equipment in the medical field. To effectively integrate centrifuges for solid-liquid reagent separation, existing centrifuge tubes lack built-in filter components, making solid-liquid reagent separation impossible. Therefore, it is necessary to design a centrifuge tube with a filter component. However, due to the pointed structure of the centrifuge tube itself, welding the internal filter membrane material is extremely difficult. The filter structure needs to be disassembled and reassembled to allow for the smooth embedding of the filter membrane component and to enable centrifugal pressure filtration in conjunction with the centrifuge. Utility Model Content

[0003] The purpose of this invention is to address the problem that existing centrifuge tubes are difficult to embed with filter components, making it impossible to effectively pressurize and filter solid and liquid pharmaceuticals using a centrifuge. We need to design a centrifuge tube with an embedded filter component, using a separate inner and outer tube design. A filter membrane is designed on the inner surface of the inner tube, and the centrifuge's swirling motion pressurizes the pharmaceuticals in the inner tube, allowing them to be filtered through the filter membrane. The filtered pharmaceuticals then converge in the outer tube. It is evident that the centrifuge can greatly improve the filtration efficiency of the pharmaceuticals.

[0004] The technical solution adopted to solve the above problems is:

[0005] An ultrafiltration centrifuge tube includes an outer tube, an inner tube, a filter membrane, and a cap. The cap is screwed into a threaded section on the upper outer circumference of the outer tube. The inner tube is disposed inside the outer tube and is fitted with the outer tube through a axial hole with a clearance fit. The upper end of the inner tube has a stepped surface. After the stepped surface is fitted against the upper end face of the outer tube, the threaded section of the cap achieves a tight seal. The lower end of the inner tube has an array of several filtrate holes, and the filter membrane is disposed on the inner wall facing the filtrate hole area.

[0006] The filter membrane is attached to the lower inner wall of the inner tube. When the ultrafiltration centrifuge tube is swung and rotated by the centrifuge, the liquid to be filtered in the inner tube is forced through the filter membrane under centrifugal force, thus separating the solid and liquid components.

[0007] A gap is left between the outer wall of the inner tube and the inner wall of the outer tube to collect and filter the medicine.

[0008] Furthermore, the inner tube is composed of two symmetrically spliced ​​half-tube structures, including a left half-tube and a right half-tube. The left half-tube and the right half-tube are sealed with filter membranes on their inner surfaces and are tightly joined together using sealing elements.

[0009] Furthermore, the left and right halves of the tube are connected by hot-melt welding, ultrasonic welding, or glue sealing.

[0010] Furthermore, the lower end of the inner tube is flat and conical, forming a flat surface that is symmetrical from left to right. One side of the flat surface has a clearance hole to facilitate the installation of the filter membrane, and the other side of the flat surface has an array of several filtrate holes, which are sealed with the filter membrane.

[0011] Furthermore, the clearance hole is sealed with a filter window by hot-melt welding or glue, and the filter window array is provided with a number of filtrate holes, and a filter membrane is attached to the inner surface.

[0012] The beneficial effects of this utility model are:

[0013] This ultrafiltration centrifuge tube features a specially designed inner tube and a filter membrane on its inner wall. This design effectively places the solid-liquid mixture of reagents within the inner tube and allows for rapid and efficient filtration of the diluted solution under centrifugal action. Furthermore, to facilitate membrane installation, a separate inner tube design is adopted, allowing for assembly after the membrane is bonded, simplifying the process and reducing costs. The flattened inner tube design also ensures the stability and reliability of the filter membrane structure during pressurized centrifugation, resulting in durability. Attached Figure Description

[0014] Figure 1 This is an exploded view of the ultrafiltration centrifuge tube from Example 1;

[0015] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0016] Figure 3 This is a cross-sectional view of the ultrafiltration centrifuge tube from Example 1;

[0017] Figure 4 This is an exploded view of the ultrafiltration centrifuge tube from Example 2;

[0018] Figure 5 This is a cross-sectional view of the ultrafiltration centrifuge tube from Example 2;

[0019] Figure 6 for Figure 5 A magnified view of a section at point B in the middle;

[0020] Among them, 1-outer tube, 2-threaded section, 3-filter membrane, 4-first filtrate hole, 5-right half tube, 6-stepped surface, 7-pipe cap, 8-flat surface, 9-left half tube, 10-seal, 11-inner tube, 12-filter window, 13-second filtrate hole, 14-avoidance hole, 15-gap. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and by way of embodiments.

[0022] Example 1 :

[0023] Please see Figures 1 to 3 This embodiment proposes an ultrafiltration centrifuge tube, including an outer tube 1, an inner tube 11, a filter membrane 3, and a cap 7. The cap 7 is screwed into a threaded section 2 on the outer periphery of the upper end of the outer tube 1. The inner tube 11 is disposed inside the outer tube 1, and the inner tube 11 is fitted with the shaft hole of the outer tube 1 with a clearance fit. The upper end of the inner tube 11 is provided with a stepped surface 6. After the stepped surface 6 is attached to the upper end surface of the outer tube 1, the threaded section of the cap 7 achieves a tight seal. The lower end of the inner tube 11 is provided with an array of several first filtrate holes 4. A filter membrane 3 is installed on the inner wall of the area of ​​the first filtrate hole 4. The filter membrane 3 is attached to the lower part of the inner wall of the inner tube 11. When the ultrafiltration centrifuge tube is swung and rotated by the centrifuge, the drug solution to be filtered in the inner tube 11 is pressed through the filter membrane 3 under the action of centrifugal force to separate the solid and liquid drugs. A gap 15 is left between the outer wall of the inner tube 11 and the inner wall of the outer tube 1 to collect the filtered drug solution, so that the filtered drug solution can be collected in the gap 15 and diverted from the multiple first filtrate holes 4 into the outer tube 1.

[0024] Further implementation plans are as follows, see [link / reference] Figure 1 The inner tube 11 is composed of two symmetrically spliced ​​half-tube structures, including a left half-tube 9 and a right half-tube 5. The left half-tube 9 and the right half-tube 5 are sealed with a filter membrane 3 on their inner surfaces and are spliced ​​and tightly fitted by a sealing member 10.

[0025] Example 2 :

[0026] Please see Figures 4 to 6 This embodiment proposes an ultrafiltration centrifuge tube, including an outer tube 1, an inner tube 11, a filter membrane 3, and a cap 7. The cap 7 is screwed into a threaded section 2 on the outer periphery of the upper end of the outer tube 1. The inner tube 11 is disposed inside the outer tube 1, and the inner tube 11 is fitted with the shaft hole of the outer tube 1 with a clearance fit. The upper end of the inner tube 11 is provided with a stepped surface 6. After the stepped surface 6 is attached to the upper end surface of the outer tube 1, it is screwed and locked tightly by the cap 7. The lower end of the inner tube 11 is provided with an array of several second filtrate holes 13, and the filter membrane 3 is disposed on the inner wall facing the area of ​​the second filtrate holes.

[0027] Unlike the technical solution of Embodiment 1, the lower end of the inner tube 11 is flat and conical, forming a flat surface 8 that is symmetrical on both sides. One side of the flat surface 8 is provided with a clearance hole 14 to facilitate the installation of the filter membrane 3, and the other side of the flat surface 8 is provided with an array of several second filtrate holes, which are sealed together with the filter membrane 3.

[0028] A further implementation is that the clearance hole 14 is sealed with a filter window 12 by hot melt welding or glue, and the filter window 12 array is provided with a plurality of second filtrate holes 13, and a filter membrane 3 is attached to the inner surface.

[0029] The advantages of Example 2 are: the integrated inner tube structure is more stable, the separately opened filter window 12 can easily assemble the filter membrane and the inner tube, can effectively place the solid-liquid mixed agent in the inner tube, and under the action of centrifuge, quickly and efficiently filter out the diluted drug solution.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes, modifications, substitutions and variations can be made without departing from the spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultrafiltration centrifuge tube comprising an outer tube, an inner tube, a filtration membrane, and a tube cap, characterized by: The cap is screwed into the threaded section on the upper outer circumference of the outer tube. The inner tube is located inside the outer tube and is fitted with the outer tube through the axial hole with a clearance fit. The upper end of the inner tube has a stepped surface. After the stepped surface is fitted against the upper end face of the outer tube, the cap screws into the threaded section to achieve a tight seal. The lower end of the inner tube has an array of several filtrate holes, and a filter membrane is installed on the inner wall facing the filtrate hole area. The filter membrane is attached to the lower inner wall of the inner tube. When the ultrafiltration centrifuge tube is swung and rotated by the centrifuge, the liquid to be filtered in the inner tube is forced through the filter membrane under centrifugal force, thus separating the solid and liquid components. A gap is left between the outer wall of the inner tube and the inner wall of the outer tube to collect and filter the medicine.

2. The ultrafiltration centrifuge tube of claim 1, wherein: The inner tube is composed of two symmetrically spliced ​​half-tube structures, including a left half-tube and a right half-tube. The left half-tube and the right half-tube are sealed with filter membranes on their inner surfaces and are tightly joined together using sealing elements.

3. The ultrafiltration centrifuge tube of claim 2, wherein: The left and right halves of the tube are connected by hot melt welding, ultrasonic welding, or glue sealing.

4. The ultrafiltration centrifuge tube according to claim 1, characterized in that: The lower end of the inner tube is flat and conical, forming a flat surface that is symmetrical from left to right. One side of the flat surface has a clearance hole to facilitate the installation of the filter membrane, and the other side of the flat surface has an array of several filtrate holes, which are sealed with the filter membrane.

5. The ultrafiltration centrifuge tube of claim 4, wherein: The clearance hole is sealed with a filter window by hot melt welding or glue. The filter window array is provided with a number of filtrate holes and a filter membrane is attached to the inner surface.

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