CN220715131U - Liquid sample filtering device - Google Patents
Liquid sample filtering device Download PDFInfo
- Publication number
- CN220715131U CN220715131U CN202322329969.0U CN202322329969U CN220715131U CN 220715131 U CN220715131 U CN 220715131U CN 202322329969 U CN202322329969 U CN 202322329969U CN 220715131 U CN220715131 U CN 220715131U
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- China
- Prior art keywords
- filter
- liquid sample
- membrane
- piston
- top cover
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- 238000001914 filtration Methods 0.000 title claims abstract description 53
- 239000007788 liquid Substances 0.000 title claims abstract description 47
- 239000012528 membrane Substances 0.000 claims abstract description 42
- 238000005070 sampling Methods 0.000 claims abstract description 31
- 239000002033 PVDF binder Substances 0.000 claims description 6
- 239000004695 Polyether sulfone Substances 0.000 claims description 6
- 229920006393 polyether sulfone Polymers 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 6
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229920006221 acetate fiber Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000036512 infertility Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to a liquid sample filtering device, which comprises a filtering cylinder; the bottom of the filter cartridge body is provided with a sampling tube communicated with the inside of the filter cartridge body; a piston is arranged in the filter cartridge body in a sliding manner; one end of the piston, which is far away from the sampling tube, is provided with a T-shaped push rod; one end of the T-shaped push rod, which is far away from the piston, extends out of the cartridge filter cylinder body and is used for pushing the piston to move back and forth in the cartridge filter cylinder body; a filter is arranged on the outlet pipe; the filter comprises a filter top cover connected with the outlet pipe and a filter base connected with the filter top cover; a filtering membrane is arranged between the filter top cover and the filter base and is used for filtering the liquid sample; and a sampling tube is arranged at the bottom of the filter base and used for sucking the liquid sample. The utility model has the advantages of simple operation, continuous and rapid filtration of samples, effective separation of impurities in liquid samples, no change of sample quality and the like.
Description
Technical Field
The utility model relates to the technical field of liquid sample filtering equipment, in particular to a liquid sample filtering device.
Background
Laboratory often contains small clots, precipitated particles, and other impurities during collection and processing of liquid samples, such as blood samples. During the subsequent sampling analysis, the particles in the sample gun head can be blocked, so that the sample with the volume required by the experiment cannot be taken out.
For this reason, before sampling, filtering of impurities such as particulate matter is performed. At present, a centrifugal separation technology is generally adopted for laboratory filtration, namely, a high-speed centrifuge is used for carrying out centrifugal treatment on a sample so as to separate particles.
However, the centrifugal separation technology has higher requirements on centrifugal force and centrifugal time, so that the operation is complicated; meanwhile, the sample rotates at a high speed in the centrifugation process, and the sample heats under the action of centrifugal acceleration and centrifugal friction force, so that the quality of the sample is influenced, and an experiment result is error.
Disclosure of Invention
Therefore, the utility model provides a liquid sample filtering device, which mainly solves the technical problems that the operation is complicated when the centrifugal technology is used for filtering impurities such as liquid sample particles and the like in the prior art, the centrifugal technology causes sample heating, the quality of the sample is influenced, and the experimental result is error.
In order to achieve the above object, the present utility model provides the following technical solutions:
a liquid sample filtration device comprising a filter cartridge; the bottom of the filter cartridge body is provided with a sampling tube communicated with the inside of the filter cartridge body; a piston is arranged in the filter cartridge body in a sliding manner; one end of the piston, which is far away from the sampling tube, is provided with a T-shaped push rod; one end of the T-shaped push rod, which is far away from the piston, extends out of the cartridge filter cylinder body and is used for pushing the piston to move back and forth in the cartridge filter cylinder body; a filter is arranged on the outlet pipe; the filter comprises a filter top cover connected with the outlet pipe and a filter base connected with the filter top cover; a filtering membrane is arranged between the filter top cover and the filter base and is used for filtering the liquid sample; and a sampling tube is arranged at the bottom of the filter base and used for sucking the liquid sample.
Optionally, the filter head comprises a head body; the top cover body is provided with a connecting pipe; the outlet pipe can be embedded into the connecting pipe; the side wall of the top cover body is provided with external threads; the filter base comprises a base body; the base body is provided with a filter tank; the inner wall of the filter tank is provided with an inward-protruding placing table for placing the filter membrane; an internal thread is arranged on the inner wall of the filter tank above the placing table; the external threads of the filter top cover and the internal threads of the filter base are connected together through threads; the sampling tube is communicated with the filter tank.
Preferably, the outer wall of the outlet pipe is provided with a raised blocking beam for limiting when the outlet pipe is embedded into the connecting pipe.
Preferably, a rubber ring is arranged on the outer side of the filtering membrane.
Preferably, one end of the T-shaped push rod, which is far away from the piston, is provided with a handle.
Alternatively, the filter membrane is a 0.45 μm sterile filter membrane or a 10 μm hydrophobic filter membrane.
Alternatively, the filter membrane is made of PVDF polyvinylidene fluoride membrane or PES polyethersulfone membrane or acetate filter membrane.
Optionally, the filter cartridge is made of polypropylene or polyethylene or medical polymeric material.
The utility model has at least the following beneficial effects:
the filter cartridge is provided with a filter cartridge, a piston and a T-shaped push rod for pushing the piston are slidably arranged in the cartridge body of the filter cartridge, a filter is arranged on the filter cartridge, the filter comprises a filter top cover and a filter base connected with the filter top cover, a filter membrane is arranged between the filter top cover and the filter base, and a sampling tube is arranged at the bottom of the filter. When filtering, put into liquid sample with the sampling tube, carry and draw T type push rod, under the suction of piston, liquid sample is inhaled the sampling tube, later through filter membrane, impurity such as particulate matter is filtered, and liquid sample after the filtration is inhaled the cartridge filter, later takes off the filter from the cartridge filter, bulldozes T type push rod, discharges the filterable liquid sample of keeping in the cartridge filter, accomplishes the filtration. The operation is simple, the filtering by the filtering membrane can not generate heat and can not cause performance change on the liquid sample, so that the subsequent experimental result is not influenced.
Therefore, the liquid sample filtering device has the advantages of simple operation, continuous and rapid sample filtering, effective separation of impurities in the liquid sample, no change of sample quality and the like.
Drawings
In order to more clearly illustrate the prior art and the present utility model, the drawings used in the description of the prior art and the embodiments of the present utility model will be briefly described. It will be apparent to those skilled in the art that the drawings in the following description are merely exemplary and that other drawings may be derived from the drawings provided without the inventive effort to those skilled in the art.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, for example, modifications, variations in proportions, or otherwise, used in the practice of the utility model, which are particularly adapted to specific environments without departing from the spirit and scope of the utility model.
FIG. 1 is a schematic diagram of a liquid sample filtering device according to the present utility model;
FIG. 2 is a schematic diagram showing the structural components of a liquid sample filtering device according to the present utility model;
FIG. 3 is a front partial cross-sectional view of a liquid sample filtration device of the present utility model;
FIG. 4 is a schematic diagram showing an assembled state of a filter cartridge and a T-shaped push rod of a liquid sample filtering device according to the present utility model;
FIG. 5 is a front cross-sectional view of a liquid sample filter device of the present utility model in an assembled state with a filter cartridge and a T-shaped push rod;
FIG. 6 is a schematic view of a filter top cover of a liquid sample filter device according to the present utility model;
FIG. 7 is a schematic diagram of a filtering membrane structure of a liquid sample filtering device according to the present utility model;
FIG. 8 is a schematic view of a filter base structure of a liquid sample filter device according to the present utility model;
reference numerals illustrate:
1. a filter cartridge; 101. a sampling tube; 1011. a barrier beam; 2. a T-shaped push rod; 201. a handle; 202. a piston; 3. a filter; 301. a filter top cover; 3011. a top cover body; 3012. a connecting pipe; 3013. an external thread; 302. a filtering membrane; 303. a filter base; 3031. a base body; 3032. a sampling tube; 3033. an internal thread; 3034. a placement table; 4. and a rubber ring.
Detailed Description
The present application is further described in detail below with reference to the attached drawings.
In the description of the present application: unless otherwise indicated, the meaning of "a plurality" is two or more. The terms "first," "second," "third," and the like in this application are intended to distinguish between the referenced objects without a special meaning in terms of technical connotation (e.g., should not be construed as emphasis on degree or order of importance, etc.). The expressions "comprising", "including", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).
The terms such as "upper", "lower", "left", "right", "middle", and the like, as referred to in this application, are generally used for convenience in visual understanding with reference to the drawings, and are not intended to be an absolute limitation of the positional relationship in actual products. Such changes in relative positional relationship are considered to be within the scope of the present description without departing from the technical concepts disclosed herein.
According to the liquid sample filtering device disclosed by the utility model, as shown in figures 1 to 8, a filter cartridge 1 is arranged, a sampling tube 101 communicated with the inside of the bottom of a cartridge body of the filter cartridge 1 is arranged, the sampling tube 101 and the filter cartridge 1 can be integrally formed, the filter cartridge 1 can be made of polypropylene or polyethylene or medical polymeric materials, the filter cartridge 1 can be reused in high-pressure sterilization, a piston 202 is slidably arranged in the cartridge body of the filter cartridge 1, one end of the piston 202, far away from the sampling tube 101, is provided with a T-shaped push rod 2, one end of the T-shaped push rod 2, far away from the piston 202, extends out of the cartridge body of the filter cartridge 1 and is used for pushing the piston 202 to move back and forth in the cartridge body of the filter cartridge 1, a filter 3 is arranged on the sampling tube 101, the filter 3 comprises a filter top cover 301 connected with the sampling tube 101 and a filter base 303 connected with the filter top cover 301, a filter membrane 302 is arranged between the filter top cover 301 and the filter base 303 and is used for filtering a liquid sample, a suction tube 3032 is arranged at the bottom of the filter base 303 and is used for sucking the liquid sample, and the inner hole of the suction tube 3032 is 3mm and the length is 8cm. In this way, during filtration, the sampling tube 3032 is placed in the liquid sample, the T-shaped push rod 2 is pulled, the liquid sample is sucked into the filter cartridge 1 by the suction of the piston 202, and impurities such as particulate matter are filtered by the filtration of the filter membrane 302.
The filter top cover 301 includes top cover body 3011, top cover body 3011 is equipped with connecting pipe 3012, connecting pipe 3012 hole internal diameter and play appearance pipe 101 external diameter adaptation, play appearance pipe 101 can imbed in connecting pipe 3012, be interference fit between them, in order to guarantee the steadiness of linking together, or, adopt threaded connection mode to link together between them, top cover body 3011 lateral wall has seted up external screw thread 3013, filter base 303 includes base body 3031, the filter vat has been seted up to base body 3031, the filter vat inner wall is provided with inwards bellied placement table 3034 for placing filtration membrane 302, the internal thread 3033 has been seted up to the filter vat inner wall of placement table 3034 top, the external thread 3013 of filter top cover 301 and the internal thread 3033 threaded connection of filter base 303 are together, suction pipe 3032 and filter vat intercommunication.
The outer wall of the sampling tube 101 is provided with a convex blocking beam 1011 for limiting when the sampling tube 101 is embedded into the connecting tube 3012.
The filter membrane 302 is a 0.45 μm sterilizing filter membrane or a 10 μm hydrophobic filter membrane, the diameter of which is 35mm, and the 0.45 μm sterilizing filter membrane is suitable for samples which need to remove microorganisms and bacteria, so as to ensure the sterility of the samples, and the 10 μm hydrophobic filter membrane is suitable for samples which need to remove larger particles or suspended matters, so as to ensure the purity of the samples. The periphery of the filtering membrane 302 is inlaid with a circle of rubber ring 4 for maintaining the stability of the filtering membrane 302, and the filtering membrane 302 is made of PVDF polyvinylidene fluoride membrane or PES polyethersulfone membrane or acetate fiber filtering membrane.
The end of the T-shaped push rod 2, which is far away from the piston 202, is provided with a handle 201, so that the operation of an operator is convenient.
When the filter cartridge is used, the piston at the bottom of the T-shaped push rod is pushed into the bottom of the filter cartridge; placing the sampling tube into a liquid sample to be filtered; the T-shaped push rod is lifted upwards, the liquid sample is sucked into the suction tube and then flows through the filtering membrane, and impurities such as particles are filtered; the filtered liquid sample is sucked into the filter cartridge; after the suction is finished, the filter is taken down from the sampling tube, the T-shaped push rod is pressed down, and the sample filtered in the filter cartridge is discharged from the sampling tube to a new centrifuge tube to finish the filtration; and then the filter top cover is taken out from the filter base, and the filtering membrane is replaced.
The foregoing has outlined and detailed description of the present application in terms of the general description and embodiments. It should be appreciated that numerous conventional modifications and further innovations may be made to these specific embodiments, based on the technical concepts of the present application; but such conventional modifications and further innovations may be made without departing from the technical spirit of the present application, and such conventional modifications and further innovations are also intended to fall within the scope of the claims of the present application.
Claims (8)
1. A liquid sample filtering device, characterized by comprising a filter cartridge (1); the bottom of the cylinder body of the filter cylinder (1) is provided with a sampling tube (101) communicated with the inside of the cylinder body; a piston (202) is arranged in the cylinder body of the filter cylinder (1) in a sliding manner; one end of the piston (202) far away from the sampling tube (101) is provided with a T-shaped push rod (2); one end of the T-shaped push rod (2) far away from the piston (202) extends out of the cylinder body of the filter cylinder (1) and is used for pushing the piston (202) to move back and forth in the cylinder body of the filter cylinder (1); a filter (3) is arranged on the sampling tube (101); the filter (3) comprises a filter top cover (301) connected with the outlet pipe (101) and a filter base (303) connected with the filter top cover (301); a filter membrane (302) is arranged between the filter top cover (301) and the filter base (303) and is used for filtering liquid samples; a suction tube (3032) is arranged at the bottom of the filter base (303) and is used for sucking a liquid sample.
2. The liquid sample filtration device of claim 1, wherein the filter cap (301) comprises a cap body (3011); the top cover body (3011) is provided with a connecting pipe (3012); the sampling tube (101) can be embedded into the connecting tube (3012); an external thread (3013) is arranged on the side wall of the top cover body (3011); the filter base (303) comprises a base body (3031); the base body (3031) is provided with a filter tank; the inner wall of the filter tank is provided with an inward-protruding placing table (3034) for placing the filter membrane (302); an internal thread (3033) is arranged on the inner wall of the filter tank above the placing table (3034); the external threads (3013) of the filter top cap (301) and the internal threads (3033) of the filter base (303) are threaded together; the suction pipe (3032) is communicated with the filter tank.
3. A liquid sample filtering device according to claim 2, characterized in that the outer wall of the sampling tube (101) is provided with a protruding blocking beam (1011) for limiting the insertion of the sampling tube (101) into the connecting tube (3012).
4. A liquid sample filtering device according to claim 2, characterized in that a rubber ring (4) is arranged outside the filtering membrane (302).
5. A liquid sample filter device according to claim 1, characterized in that the end of the T-shaped push rod (2) remote from the piston (202) is provided with a handle (201).
6. A liquid sample filtration device according to any one of claims 1 to 5, wherein the filter membrane (302) is a 0.45 μm sterile filter membrane or a 10 μm hydrophobic filter membrane.
7. A liquid sample filtration device according to claim 6, characterized in that the filtration membrane (302) is made of PVDF polyvinylidene fluoride membrane or PES polyethersulfone membrane or acetate membrane.
8. A liquid sample filtration device according to any one of claims 1 to 5, wherein the filter cartridge (1) is made of polypropylene or polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322329969.0U CN220715131U (en) | 2023-08-29 | 2023-08-29 | Liquid sample filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322329969.0U CN220715131U (en) | 2023-08-29 | 2023-08-29 | Liquid sample filtering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220715131U true CN220715131U (en) | 2024-04-05 |
Family
ID=90486316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322329969.0U Active CN220715131U (en) | 2023-08-29 | 2023-08-29 | Liquid sample filtering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220715131U (en) |
-
2023
- 2023-08-29 CN CN202322329969.0U patent/CN220715131U/en active Active
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