CN218047319U - Laboratory liquid sample filter - Google Patents
Laboratory liquid sample filter Download PDFInfo
- Publication number
- CN218047319U CN218047319U CN202222221578.2U CN202222221578U CN218047319U CN 218047319 U CN218047319 U CN 218047319U CN 202222221578 U CN202222221578 U CN 202222221578U CN 218047319 U CN218047319 U CN 218047319U
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- CN
- China
- Prior art keywords
- liquid sample
- water conservancy
- conservancy diversion
- flow guide
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000007788 liquid Substances 0.000 title claims abstract description 32
- 238000002347 injection Methods 0.000 claims abstract description 33
- 239000007924 injection Substances 0.000 claims abstract description 33
- 239000012528 membrane Substances 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 17
- 239000002253 acid Substances 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- 238000001914 filtration Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 10
- 239000008188 pellet Substances 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a laboratory liquid sample filter belongs to millipore filtration technical field. Including the pusher, the push rod, piston and injection tube, both ends about the push rod are connected respectively to the pusher and piston, piston sliding connection is inside the injection tube, be equipped with the filter element in the injection tube, the filter element includes the filter membrane, activity pellet and outer sleeve, activity pellet sliding connection is in the centre bore of outer sleeve, be equipped with water conservancy diversion central passage and water conservancy diversion side passageway on the activity pellet, water conservancy diversion central passage and water conservancy diversion side passageway intercommunication, the filter membrane is fixed at activity pellet top, and cover in water conservancy diversion central passage open-ended top, the injection tube bottom is equipped with the through-hole, swing joint water conservancy diversion mouth in the through-hole, water conservancy diversion mouth top and activity pellet bottom fixed connection, and with water conservancy diversion central passage intercommunication. The utility model discloses to cross the setting of filter element inside the syringe, can bear stronger interior pressure during the filtration, can not appear crossing the condition that the filter element drops, need not to take out moreover and cross the filter element and can realize extracting the liquid sample.
Description
Technical Field
The utility model belongs to a microporous filter, specifically speaking especially relates to a laboratory liquid sample filter.
Background
In the laboratory experiment process, in order to purify and remove insoluble impurities in a liquid sample, or to meet the operation requirement of an executed detection standard method, or to prevent a liquid chromatography column/gas capillary column from being blocked and scrapped due to large spectrum detection errors caused by turbidity of the liquid sample, the liquid sample needs to be subjected to filter membrane filtration treatment. The specific operation steps of filtering the liquid sample to be detected are as follows: taking a disposable syringe, connecting a filter membrane device on a syringe connecting head, adding a sample to be filtered into the syringe, and squeezing a syringe plunger rod to finish sample filtration. However, the filtering device used above has the following drawbacks: (1) The filter membrane device is only inserted on the connecting head of the syringe, when a viscous sample and a particularly turbid sample are filtered, once force is not applied properly or pressure is too large, the joint of the syringe and the filter membrane device is loosened due to too large internal pressure applied to the interface of the syringe and the filter membrane device, and liquid in the syringe overflows or splashes out of the joint, so that not only is the personal safety of experimenters threatened, but also experimental errors are caused, and inconvenience is brought to experimental operation; (2) Because the aperture of the filter membrane is only a few tenths of microns, the piston rod needs to be pressed by force when viscous samples and samples with large concentration are filtered, and the filtering process is time-consuming and labor-consuming.
Disclosure of Invention
The utility model aims at providing a laboratory liquid sample filter to overcome the defect that when the laboratory carries out liquid sample filtration among the prior art syringe and filter membrane ware's interface drops because interior pressure is too big easily.
The utility model discloses an adopt following technical scheme to realize: the utility model provides a laboratory liquid sample filter, includes and pushes away head, push rod, piston and injection tube, push head and piston are connected both ends about the push rod respectively, piston sliding connection is inside the injection tube, be equipped with the filter core in the injection tube, the filter core includes filter membrane, activity pellet and outer sleeve, activity pellet sliding connection is in the centre bore of outer sleeve, be equipped with water conservancy diversion center channel and water conservancy diversion side passageway on the activity pellet, water conservancy diversion center channel and water conservancy diversion side passageway intercommunication, the filter membrane is fixed at activity pellet top to cover in the open-ended top of water conservancy diversion center channel, the injection tube bottom is equipped with the through-hole, swing joint water conservancy diversion mouth in the through-hole, water conservancy diversion mouth top and activity pellet bottom fixed connection, and the water conservancy diversion center passageway that leads to.
And the upper part and the lower part of the outlet of the outer diversion side channel of the movable core block are respectively provided with an annular groove, and an upper sealing ring and a lower sealing ring are sleeved in the two annular grooves.
And a limiting check ring is arranged on the flow guide nozzle outside the injection tube.
The filter membrane is a microporous filter membrane resistant to acid and alkali corrosion or organic reagents.
The push rod is provided with external threads and is connected with the threaded sleeve through the external threads, the threaded sleeve is connected with the fixing piece, and the fixing piece is detachably connected with the injection tube.
The mounting includes connecting plate and elasticity couple, and a plurality of elasticity couple fixed connection is in the connecting plate outward flange, elasticity couple centre gripping is on the fin at injection tube top.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) The utility model discloses to cross the setting of filter element inside the syringe, can bear stronger interior pressure during the filtration, the condition that the filter element drops can not appear.
(2) The utility model discloses need not to take out and filter the core and can realize extracting the liquid sample, when needs extraction liquid sample, release the outer sleeve with the water conservancy diversion side passageway export on the movable core piece, make water conservancy diversion side passageway export and the inside conduction of injection tube, when needs filter the detection liquid, pull in the outer sleeve with the water conservancy diversion side passageway export on the movable core piece and seal up, the operation is very simple high-efficient.
(3) The utility model discloses when carrying out the liquid sample filtration, can realize slowly promoting piston extrusion liquid sample through the rotatory push rod that sets up the external screw thread with less power and pass through the filter membrane, filtration process labour saving and time saving.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1.
Fig. 3 is a plan view of the present invention.
Fig. 4 is an enlarged view of a portion B of fig. 2.
In the figure: 1. pushing the head; 2. a push rod; 3. a threaded sleeve; 4. a connecting plate; 5. a fin plate; 6. an elastic hook; 7. an injection tube; 8. a limit retainer ring; 9. a flow guide nozzle; 10. a piston; 11. filtering the membrane; 12. an outer sleeve; 13. a movable core block; 14. a flow guiding central passage; 15. a through hole; 16. an upper sealing ring; 17. a flow guide side channel; 18. and a lower sealing ring.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 to 4, a laboratory liquid sample filter comprises a pushing head 1, a pushing rod 2, a piston 10 and an injection tube 7, wherein the pushing head 1 and the piston 10 are respectively connected to the upper end and the lower end of the pushing rod 2, the piston 10 is slidably connected inside the injection tube 7, a filter core is arranged in the injection tube 7, the filter core comprises a filter membrane 11, a movable core block 13 and an outer sleeve 12, the movable core block 13 is slidably connected in a central hole of the outer sleeve 12, the size of the movable core block is matched with that of the central hole of the outer sleeve 12, a flow guiding central channel 14 and a flow guiding side channel 17 are arranged on the movable core block 13, the flow guiding central channel 14 is communicated with the flow guiding side channel 17, the filter membrane 11 is fixed on the top of the movable core block 13 and covers the opening of the flow guiding central channel 14, a through hole 15 is arranged at the bottom of the injection tube 7, a flow guiding nozzle 9 is movably connected in the through hole 15, the upper side of the flow guiding nozzle 9 is fixedly connected with the bottom of the movable core block 13, and is communicated with the flow guiding central channel 14.
An annular groove is respectively arranged above and below the outlet of the outer diversion side channel 17 of the movable core block 13, and an upper sealing ring 16 and a lower sealing ring 18 are sleeved in the two annular grooves. The upper sealing ring 16 and the lower sealing ring 18 are used for sealing the upper part and the lower part of the diversion side channel 17 respectively, and liquid is prevented from flowing out through a gap between the movable core block 13 and the outer sleeve 12.
A limiting retainer ring 8 is arranged on the flow guiding nozzle 9 outside the injection tube 7. The limiting retainer ring 8 is used for limiting the upward movement displacement of the movable core block 13 in the outer sleeve 12, and the maximum upward movement displacement of the movable core block 13 in the outer sleeve 12 ensures that the flow guide side channel 17 is communicated with the interior of the injection cylinder 7.
In order to prevent the liquid sample from corroding the filter membrane 11, the filter membrane 11 is a microporous filter membrane resistant to acid and base corrosion or to organic reagents.
Be equipped with the external screw thread on the push rod 2, the push rod 2 is connected with thread bush 3 through the external screw thread, and thread bush 3 is connected with the mounting, and the mounting can be dismantled with injection tube 7 and be connected.
Wherein, the mounting includes connecting plate 4 and elastic hook 6, 6 fixed connection of a plurality of elastic hook 6 are at the 4 outward flanges of connecting plate, and elastic hook 6 centre gripping is on the fin 5 at 7 tops of injection tube.
The utility model discloses a theory of operation: when a liquid sample needs to be extracted, the outlet of the flow guide side channel 17 on the movable core block 13 is pushed out of the outer sleeve 12 by pushing the flow guide nozzle 9, so that the outlet of the flow guide side channel 17 is communicated with the interior of the injection tube 7, the upper sealing ring 16 is separated from contact with the outer sleeve 12, the lower sealing ring 18 still keeps contact and sealing with the outer sleeve 12, then the piston 10 is driven by pulling the push rod 2 upwards, negative pressure is generated in the injection tube 7, and the liquid sample to be filtered can be pumped into the injection tube 7 through the flow guide nozzle 9 and the flow guide side channel 17. When a liquid sample needs to be filtered, the outlet of the flow guide side channel 17 on the movable core block 13 is pulled into the outer sleeve 12 to be blocked by pulling the flow guide nozzle 9, the upper sealing ring 16 and the lower sealing ring 18 are kept in contact sealing with the outer sleeve 12, then the elastic hook 6 of the fixing piece is clamped on the fin 5 at the top of the injection tube 7, then the push rod 2 is rotated, the piston 10 is extruded by the push rod 2 through a thread structure, the liquid sample can be filtered through the filter membrane 11, and the filtered liquid sample is discharged through the flow guide central channel 14 and the flow guide nozzle 9.
Claims (6)
1. The utility model provides a laboratory liquid sample filter, includes and pushes away head (1), push rod (2), piston (10) and injection tube (7), push head (1) and piston (10) are connected respectively in push rod (2) upper and lower both ends, piston (10) sliding connection is in injection tube (7), its characterized in that: the filter element is arranged in the injection cylinder (7) and comprises a filter membrane (11), a movable core block (13) and an outer sleeve (12), the movable core block (13) is connected in a central hole of the outer sleeve (12) in a sliding mode, a flow guide central channel (14) and a flow guide side channel (17) are arranged on the movable core block (13), the flow guide central channel (14) is communicated with the flow guide side channel (17), the filter membrane (11) is fixed to the top of the movable core block (13) and covers the opening of the flow guide central channel (14), a through hole (15) is formed in the bottom of the injection cylinder (7), a flow guide nozzle (9) is movably connected in the through hole (15), and the upper portion of the flow guide nozzle (9) is fixedly connected with the bottom of the movable core block (13) and communicated with the flow guide central channel (14).
2. The laboratory liquid sample filter of claim 1, wherein: and annular grooves are respectively arranged above and below the outlet of the outer diversion side channel (17) of the movable core block (13), and an upper sealing ring (16) and a lower sealing ring (18) are sleeved in the two annular grooves.
3. The laboratory liquid sample filter of claim 1, wherein: and a limiting check ring (8) is arranged on the flow guide nozzle (9) outside the injection cylinder (7).
4. The laboratory liquid sample filter of claim 1, wherein: the filter membrane (11) is a microporous filter membrane resistant to acid and alkali corrosion or organic reagents.
5. The laboratory liquid sample filter of claim 1, wherein: the injection device is characterized in that external threads are arranged on the push rod (2), the push rod (2) is connected with the threaded sleeve (3) through the external threads, the threaded sleeve (3) is connected with the fixing piece, and the fixing piece is detachably connected with the injection tube (7).
6. The laboratory liquid sample filter of claim 5, wherein: the fixing piece comprises a connecting plate (4) and a plurality of elastic hooks (6), the elastic hooks (6) are fixedly connected to the outer edge of the connecting plate (4), and the elastic hooks (6) are clamped on a fin plate (5) at the top of the injection cylinder (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222221578.2U CN218047319U (en) | 2022-08-23 | 2022-08-23 | Laboratory liquid sample filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222221578.2U CN218047319U (en) | 2022-08-23 | 2022-08-23 | Laboratory liquid sample filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218047319U true CN218047319U (en) | 2022-12-16 |
Family
ID=84404950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222221578.2U Active CN218047319U (en) | 2022-08-23 | 2022-08-23 | Laboratory liquid sample filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218047319U (en) |
-
2022
- 2022-08-23 CN CN202222221578.2U patent/CN218047319U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |