CN212914748U - Suction filtration device - Google Patents
Suction filtration device Download PDFInfo
- Publication number
- CN212914748U CN212914748U CN202021625521.3U CN202021625521U CN212914748U CN 212914748 U CN212914748 U CN 212914748U CN 202021625521 U CN202021625521 U CN 202021625521U CN 212914748 U CN212914748 U CN 212914748U
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- China
- Prior art keywords
- suction filtration
- cylinder
- sample
- gasket
- filtration device
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- 238000000967 suction filtration Methods 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 239000012528 membrane Substances 0.000 claims abstract description 24
- 238000000605 extraction Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000003570 air Substances 0.000 description 10
- 238000001914 filtration Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000012864 cross contamination Methods 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004429 Calibre Substances 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004993 emission spectroscopy Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Images
Abstract
The utility model discloses a suction filtration device, which comprises a filter screen, a sample cylinder, a shunt cylinder, gaskets, sealing pads, a collection container and a filter membrane, wherein the filter screen is movably arranged in the sample cylinder, the bottom of the sample cylinder is in threaded connection with the top of the shunt cylinder, the top opening of the shunt cylinder is provided with a funnel structure, one side of the shunt cylinder is provided with an air suction opening, the air suction opening is connected with an air suction pump, the bottom of the shunt cylinder is provided with a liquid outlet, 2 gaskets are arranged on the funnel structure, the gaskets are annular sheets, the filter membrane is clamped between the 2 gaskets and is positioned above the funnel structure, the liquid outlet of the shunt cylinder is arranged in the collection container through the sealing pads, and the sealing pads are matched with the opening of; this device realizes that the sample two-stage filters, improves suction filtration efficiency, reduces the filter membrane and changes the number of times, reduces use cost, has avoided the condition that can not open after the taper rubber stopper suction filtration, has improved operating efficiency.
Description
Technical Field
The utility model belongs to laboratory, scene and open-air sampling device, concretely relates to novel suction filtration device.
Background
Suction filtration is a common sample pretreatment means in the monitoring and analysis process, and aims to purify liquid and collect filtrate or collect suspended matters and the like in waterAnd (3) fine particles. Precipitation of cations (Na) from ambient air+、NH4 +、k+、Mg2+、Ca2+) The specifications of the measurement ion chromatography (HJ 1005-2018), the instruction book of the task monitoring task operation of the national monitoring network for the quality of the surface water environment (trial implementation), and the measurement inductively coupled plasma emission spectrometry (HJ 776-2015) for 32 elements in water quality require that when soluble elements are measured, the collected water sample is filtered by a 0.45 mu m filter membrane and then is measured. In the existing suction filtration device in the market, a filter membrane is easily blocked by large-particle substances in a water body in the use process, the filter membrane needs to be frequently replaced, the suction filtration efficiency is reduced, and the use cost is increased; the suction filtration device in the current market needs to be provided with a liquid collecting bottle independently, is inconvenient to carry in field operation, can be used only by cleaning the liquid collecting bottle for many times when samples at different point positions are extracted, reduces the operation efficiency, and is easy to cause cross contamination of the samples; the liquid collecting bottle of the suction filtration device in the current market is provided with a conical rubber plug or a glass plug, and the phenomenon that the rubber plug or the glass plug is difficult to open is easy to occur after suction filtration.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a suction filtration device has realized the second grade filtration of sample, is difficult for blockking up, and portable need not dispose solitary collecting bottle, applicable in the filtrating collecting container of different bores, has avoided the cross contamination between the different samples.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
the utility model discloses suction filtration device includes the filter screen, the sample jar, the reposition of redundant personnel jar, the gasket, seal the pad, the collection container, the filter membrane, the filter screen activity sets up in the sample jar, sample bottom of the cylinder portion and reposition of redundant personnel jar top threaded connection, reposition of redundant personnel jar open-top department is provided with the funnel structure, it has the extraction opening to open reposition of redundant personnel jar one side, the extraction opening is connected with the aspiration pump, it has the liquid outlet to open reposition of redundant personnel bottom of the cylinder portion, 2 individual gasket settings are structural at the funnel, the gasket is the annular piece, the filter membrane presss from both sides between 2 individual gaskets and is located funnel structure top, the liquid outlet of reposition of redundant personnel jar sets up in the collection container.
The filter screen top edge is provided with the stationary blade for set up the filter screen top on the sample jar.
The gasket is a stainless steel gasket, and the filter membrane is various types of filter membranes which are commercially available in the conventional way and used for filtering.
The sealing pad is a cylindrical rubber pad, and the diameter of the sealing pad is larger than that of an opening at the upper part of the collecting container.
The bottom of the sample cylinder is provided with an external thread, the top opening of the flow distribution cylinder is provided with an internal thread and is positioned above the funnel structure, and the bottom of the sample cylinder is in threaded connection with the top of the flow distribution cylinder.
And a rubber sealing ring is arranged on the gasket.
During the use, place the filter membrane in required aperture between 2 gaskets, be connected the back with the reposition of redundant personnel jar with the sample jar, put the filter screen in the sample jar, then put the pad of sealing on the reposition of redundant personnel jar liquid outlet on the collection container mouth, be connected the extraction opening and the aspiration pump on the reposition of redundant personnel jar, open the aspiration pump, compress tightly the pad of sealing with the hand, make the pad of sealing closely laminate with the collection container mouth, then will treat that the liquid of suction filtration adds from the filter screen, under the aspiration pump effect, liquid passes through the filter screen and gets into the sample jar, then get into the funnel structure through the filter membrane, the rethread liquid outlet gets into in the collection container, accomplish the suction filtration.
The utility model has the advantages that:
1. the air suction port is arranged on the side surface of the flow dividing cylinder, so that the size of the suction filtration device is reduced, and the suction filtration device is convenient to carry and carry in field operation;
2. the sealing pad is suitable for collecting containers with different calibers, and a liquid collecting bottle with a fixed calibre does not need to be independently prepared;
3. the secondary filtration of the sample is realized, the filter membrane is not easy to block, and the suction filtration efficiency is improved; the portable liquid collecting device is convenient to carry, does not need to be provided with a separate liquid collecting bottle, can be suitable for collecting containers with different calibers, and avoids cross contamination among different samples; the filter membrane replacement frequency is reduced, the use cost is reduced, the condition that the conical rubber plug cannot be opened after suction filtration is avoided, and the operation efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts;
FIG. 1 is a schematic structural diagram of the device of the present invention;
FIG. 2 is a schematic view of a part of the structure of the device of the present invention;
FIG. 3 is a schematic view of a part of the structure of the flow dividing cylinder of the present invention;
in the figure: 1-filtering with a filter screen; 2-sample cylinder; 3-a flow-dividing cylinder; 4-a gasket; 5-an air extraction opening; 6-sealing pad; 7-a liquid outlet; 8-a collection container; 9-funnel structure; 10-a filter membrane; 11-a fixing sheet; 12-internal thread.
Detailed Description
The invention is explained in more detail below with reference to the figures and examples, without limiting the scope of the invention to the details.
Example 1: as shown in fig. 1-3, the suction filtration device comprises a filter screen 1, a sample cylinder 2, a diversion cylinder 3, a gasket 4, a sealing pad 6, a collection container 8 and a filter membrane 10, wherein the filter screen 1 is movably arranged in the sample cylinder 2 through a fixing piece 11, the fixing piece 11 is arranged at the top of the sample cylinder 2, the bottom of the sample cylinder 2 is provided with an external thread, an opening at the top of the diversion cylinder 3 is provided with an internal thread 12, the bottom of the sample cylinder 2 is in threaded connection with the top of the diversion cylinder 3, an opening at the upper part of the diversion cylinder 3 is provided with a funnel structure 9 and is positioned below the internal thread 12, one side of the diversion cylinder 3 is provided with an air extraction opening 5 which is connected with an air extraction pump, the bottom of the diversion cylinder 3 is provided with a liquid outlet 7, 2 gaskets 4 are arranged on the funnel structure 9, the gaskets; the sealing pad 6 is sleeved on the liquid outlet 7, the liquid outlet 7 is arranged in the collecting container 8 through the sealing pad 6, the sealing pad 6 is matched with an opening of the collecting container 8, the sealing pad 6 is a cylindrical rubber pad, and the diameter of the sealing pad is larger than that of the opening of the collecting container 8; the filter screen 1 is a stainless steel filter screen, and the sample cylinder 2 and the shunt cylinder 3 are glass cylinders.
Example 2: the structure of the device is the same as that of embodiment 1, the difference lies in that a rubber sealing ring is arranged on the gasket 4, the filter screen 1 is a nylon filter screen, and the sample cylinder 2 and the shunt cylinder 3 are organic glass cylinders.
When the device is used, a filter membrane 10 with a required aperture is placed between 2 gaskets 4, then the gaskets are placed on a funnel structure 9 of a shunting cylinder 3, after the sample cylinder 2 and the shunting cylinder 3 are connected through threads, a filter screen 1 is placed in the sample cylinder 2 through a fixing piece 11, a liquid outlet 7 is placed in a port of a collecting container 8 through a sealing pad 6, an air suction port 5 in the shunting cylinder 3 is connected with an air suction pump, the air suction pump is opened, the sealing pad 6 is pressed by hands to enable the sealing pad to be tightly attached to the port of the collecting container, then liquid to be filtered is added into the filter screen, and the filter screen primarily filters large granular substances such as algae, soil, gravels and the like in the liquid, so that the filter membrane is prevented from being blocked by impurity enrichment; negative pressure is formed in the collection container 8, liquid enters the sample tank 2 through the filter screen 1 and then enters the funnel structure 9 through the filter membrane, the liquid is secondarily filtered by the filter membrane 10, the liquid enters the collection container through the liquid outlet, after the suction filtration is finished, the air pump is closed, the shunt cylinder is taken down, the cover of the collection container is covered, and the filtrate can be used for analysis; and taking down the filter screen 1, removing the particles on the filter screen 1, replacing the filter membrane with required aperture according to actual conditions, and cleaning to perform suction filtration operation on the next sample.
In conclusion, by means of the technical scheme of the utility model, the two-stage filtration of the sample with high impurity content is realized, and the risk that the filter membrane is blocked is reduced; the air exhaust hole is arranged on the side surface of the flow dividing cylinder, so that the volume of the suction filtration device is reduced, the carrying is convenient, and the field operation is convenient; the cylindrical rubber pad is suitable for filtrate collecting containers with different calibers, such as a colorimetric tube, glass bottles with different volumes, plastic bottles and the like, and a liquid collecting bottle with a fixed caliber does not need to be prepared, so that the operation is convenient, and the cross contamination caused by using the same liquid collecting bottle is avoided.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A suction filtration device is characterized in that: comprises a filter screen (1), a sample cylinder (2), a shunt cylinder (3), a gasket (4), a sealing pad (6), a collection container (8) and a filter membrane (10), filter screen (1) activity sets up in sample jar (2), sample jar (2) bottom and reposition of redundant personnel jar (3) top threaded connection, reposition of redundant personnel jar (3) upper portion opening part is provided with funnel structure (9), it has extraction opening (5) to open reposition of redundant personnel jar (3) one side, the extraction opening is connected with the aspiration pump, it has liquid outlet (7) to open reposition of redundant personnel jar (3) bottom, 2 gasket (4) set up on funnel structure (9), gasket (4) are the ring piece, filter membrane (10) are pressed from both sides between 2 gasket (4) and are located funnel structure (9) top, the liquid outlet (7) of reposition of redundant personnel jar (3) set up in collecting container (8) through sealing pad (6), seal pad (6) and collecting container (8) mouth and mutually support.
2. The suction filtration device according to claim 1, characterized in that: the top edge of the filter screen (1) is provided with a fixing sheet (11) for arranging the top of the filter screen (1) on the sample tank (2).
3. The suction filtration device according to claim 1, characterized in that: the gasket (4) is a stainless steel gasket.
4. The suction filtration device according to claim 1, characterized in that: the sealing pad (6) is a cylindrical rubber pad.
5. The suction filtration device according to claim 1, characterized in that: the bottom of the sample cylinder (2) is provided with an external thread, and the opening at the top of the shunt cylinder (3) is provided with an internal thread and is positioned above the funnel structure.
6. The suction filtration device according to claim 5, characterized in that: the gasket (4) is provided with a rubber sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021625521.3U CN212914748U (en) | 2020-08-07 | 2020-08-07 | Suction filtration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021625521.3U CN212914748U (en) | 2020-08-07 | 2020-08-07 | Suction filtration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212914748U true CN212914748U (en) | 2021-04-09 |
Family
ID=75334951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021625521.3U Active CN212914748U (en) | 2020-08-07 | 2020-08-07 | Suction filtration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212914748U (en) |
-
2020
- 2020-08-07 CN CN202021625521.3U patent/CN212914748U/en active Active
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