CN212254812U - Filtering and enriching device for microcystin in water - Google Patents
Filtering and enriching device for microcystin in water Download PDFInfo
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- CN212254812U CN212254812U CN202020507053.3U CN202020507053U CN212254812U CN 212254812 U CN212254812 U CN 212254812U CN 202020507053 U CN202020507053 U CN 202020507053U CN 212254812 U CN212254812 U CN 212254812U
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Abstract
The utility model discloses a filtering and enriching device for microcystin in water, which comprises a filtering tube and a first inner cavity, wherein one end of the first inner cavity is connected with a liquid drainage channel, the side wall of the liquid drainage channel is provided with an exhaust tube, and a supporting plate with holes is arranged between the liquid drainage channel and the first inner cavity; the filter membrane comprises a filter membrane tube, a liquid inlet and a filter membrane, wherein one end of the filter membrane tube is provided with a liquid inlet, the other end of the filter membrane tube is provided with a filter membrane, a liquid inlet channel is arranged in the filter membrane tube, and the liquid inlet channel is communicated with the liquid inlet and the filter membrane; the filter membrane extraction tube is provided with a second inner cavity for accommodating the filter membrane tube and the extracting solution; the extraction tube cover is connected to the filter membrane extraction tube to seal the filter membrane extraction tube; wherein, the exhaust tube is connected with a vacuum pump, and the liquid discharge channel is connected with a sealed container. The filtering and enriching device for the microcystins in water has a simple structure, is high in sample extraction rate, and can effectively enrich trace amounts of the microcystins in a water sample.
Description
Technical Field
The utility model belongs to the technical field of water environment pollutant's detection, a filtration enrichment device of aquatic microcystin is related to.
Background
The existing method for detecting microcystins in water mainly adopts a high performance liquid chromatography and liquid chromatography mass spectrometry combined method. The high performance liquid chromatography has lower sensitivity, and the liquid chromatography-mass spectrometry combined method has higher sensitivity, and is the most common detection method for microcystins at present. In order to increase the detection limit of the method, the microcystins in a large volume of water sample need to be enriched when the two methods are used for measurement.
The current method for processing microcystins in a water sample mainly comprises solid phase extraction, heating evaporation concentration or direct sample injection analysis, wherein the detection limit of the method can be improved by the solid phase extraction and the heating evaporation concentration, but compared with the method which directly introduces samples, the method is complicated and complicated, the processing time is long, and no special device is provided; when the sample is directly injected and analyzed, the requirement of daily detection can be met only by using ultrahigh-sensitivity instruments and equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve one of the technical problem that exists among the prior art at least, provide a filtration enrichment facility of aquatic microcystin, carry out the water sample suction filtration through arranging the filter membrane pipe in the suction filter tube, then take out the filter membrane pipe and arrange in the filter membrane extraction tube and draw the microcystin sample and detect, simple structure can gather the microcystin in the water sample fast.
According to the utility model discloses a filtration enrichment facility of aquatic microcystin, include: the suction filter tube is provided with a first inner cavity, one end of the first inner cavity is connected with a liquid drainage channel, the side wall of the liquid drainage channel is provided with a suction tube, and a supporting plate with a hole is arranged between the liquid drainage channel and the first inner cavity; the filter membrane comprises a filter membrane tube, a liquid inlet and a filter membrane, wherein one end of the filter membrane tube is provided with a liquid inlet, the other end of the filter membrane tube is provided with a filter membrane, a liquid inlet channel is arranged in the filter membrane tube, and the liquid inlet channel is communicated with the liquid inlet and the filter membrane; a filter membrane extraction tube having a second lumen for receiving the filter membrane tube; the extraction tube cover is connected with the filter membrane extraction tube to seal the second inner cavity; wherein the air suction pipe is connected with a vacuum water pump, and the liquid discharge channel is connected with a sealed container; in the water sample filtering stage, the filter membrane pipe is positioned in the first inner cavity, the filter membrane is positioned above the supporting plate with the hole, and the vacuum water pump is started; and in the sample extraction stage, the filter membrane tube is fixedly connected with the filter membrane extraction tube.
According to the utility model discloses filtration enrichment facility of aquatic microcystin has following beneficial effect at least: when a water sample is treated and filtered, the filter membrane pipe is fixed in the filter tube and the filter membrane is made to be tightly attached to the supporting plate with the hole, the vacuum water pump of the exhaust tube is started to enable the position of the liquid drainage channel to form negative pressure, microcystis in the water sample is attached to the filter membrane after the water sample is poured in, other substances and filtrate quickly pass through the filter membrane under the action of the negative pressure and then are discharged from the liquid drainage channel to enter the sealed container, the filter membrane pipe is taken out after the filtration and is fixed in the filter membrane extraction tube, and the extract is poured in to extract microcystins in the microcystins filtered out from the filter membrane through vibration or ultrasonic extraction.
According to some embodiments of the invention, the filter membrane is adhered to the inner wall of the filter membrane tube.
According to some embodiments of the invention, the filter membrane is horizontally arranged in the filter membrane tube.
According to some embodiments of the utility model, the exhaust tube level sets up or the slope sets up upwards.
According to some embodiments of the utility model, foraminiferous backup pad with suction filtration pipe integrated into one piece, or foraminiferous backup pad swing joint in suction filtration pipe.
According to the utility model discloses a some embodiments, be provided with a plurality of round holes in the foraminiferous backup pad, it is a plurality of the round hole is arranged into a plurality of rings.
According to some embodiments of the utility model, drainage channel is leaks hopper-shaped, the diameter of foraminiferous backup pad with drainage channel's maximum diameter matches.
According to some embodiments of the present invention, the inner wall of the suction filter tube is provided with a first inner screw thread, the outer wall of the filter membrane tube is provided with a first outer screw thread matching the first inner screw thread.
According to some embodiments of the utility model, be provided with on the inner wall of filter membrane extraction tube with the second interior screw thread that first outer screw thread matches is provided with the outer screw thread of second on the outer wall, be provided with on the inner wall of extraction tube lid with the third interior screw thread that the outer screw thread of second matches.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples;
FIG. 1 is a schematic view of an assembly of an embodiment of the present invention during a filtration stage;
FIG. 2 is a schematic view of the assembly of the embodiment of the present invention during the stage of extracting the sample;
the reference numbers are as follows:
the suction filter tube 100, the first inner cavity 110, the liquid drainage channel 120, the exhaust tube 130, the support plate 140 with holes and the first inner screw thread 150;
a filter membrane tube 200, a liquid inlet 210, a liquid inlet channel 220, a filter membrane 230 and a first outer thread 240;
a vacuum water pump 300;
a filter membrane extraction tube 400, a second inner cavity 410, a second inner screw thread 420 and a second outer screw thread 430;
an extraction tube cap 500, a third internal screw thread 510.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 and 2, a filtration and enrichment apparatus for microcystin in water according to an embodiment of the present invention includes a filtration tube 100 having a first inner cavity 110, a liquid discharge channel 120 connected to the bottom of the first inner cavity, a suction tube 130 connected to the side of the liquid discharge channel, and a support plate 140 having a hole between the liquid discharge channel 120 and the first inner cavity 100; a liquid inlet 210 is arranged at one end of the filter membrane tube 200, a filter membrane 230 is arranged at the other end of the filter membrane tube, the filter membrane 230 filters out microcystis in a water sample and is attached to the membrane, other substances and the water sample can pass through the filter membrane 230, the filter membrane tube 200 is hollow and is provided with a liquid inlet channel 220, and the liquid inlet 210 is communicated with the filter membrane 230 through the liquid inlet channel 220; a filter membrane extraction tube 400 having a second inner chamber 410 for receiving the nanofiltration membrane tube 200 and a sample extraction liquid; an extraction tube cap 500 connected to the opening of the filter membrane extraction tube 400 for sealing the filter membrane extraction tube 400; wherein, a vacuum pump 300 is connected to an end of the suction pipe 130, and the drain passage 120 is connected to the sealed container. It should be noted that the vacuum pump 300 is a micro vacuum pump, which can make the sealed container and the liquid discharge passage 120 form a negative pressure state, and meanwhile, a part of the water sample is pumped into the pump in the process of falling after being filtered, and the influence on the pump body is not generated. A water sample filtering stage, referring to fig. 1, in which the filter tube 200 is fixedly connected to the suction filter tube 100 to filter trace amounts of the microcystis sample in the water sample; in the sample extraction stage, referring to fig. 2, the filter membrane tube 200 is taken out from the suction filtration tube 100 and is fixedly connected to the filter membrane extraction tube 400 to extract microcystins in the microcystins sample on the filter membrane 230.
By adopting the structure, when a sample of microcystin needs to be measured, the filter membrane tube 200 is arranged in the first inner cavity 110 of the suction filter tube 100 and fixed, the vacuum water pump 300 is started, and simultaneously, a water sample begins to be poured into the filter membrane tube 200, the liquid discharge channel 120 is in a negative pressure state under the action of the vacuum water pump 300, the water sample can rapidly pass through the filter membrane 230 and the supporting plate 140 with holes due to the influence of the negative pressure and then is discharged into the sealed container through the liquid discharge channel 120, and trace microcystin in the water sample can be enriched on the filter membrane 230; after the water sample is filtered, the filter membrane tube 200 is taken out and fixed in the second inner cavity 410 of the filter membrane extraction tube 400, the methanol extracting solution is added into the filter membrane tube 200, the extraction tube cover 500 is covered and fixed, and then the microcystins on the filter membrane 230 are fully fused with the methanol extracting solution in a vibration or ultrasonic extraction mode, and then the mixed solution can be extracted for determination. The filtering and enriching device for the microcystins in water has a simple structure, is high in sample extraction rate, and can effectively enrich trace amounts of the microcystins in a water sample.
In some embodiments of the present invention, referring to fig. 1, the filter membrane 230 is adhered to the inner wall of the filter membrane tube 200, specifically, the filter membrane 230 is adhered to the end face of the filter membrane tube 200 through epoxy resin, and is placed for a certain time to make the adhesion thereof tight, so that after the water sample is filtered, the filter membrane 230 can be directly fixed to the filter membrane extraction tube 400 along with the filter membrane tube 200, thereby reducing the extra operation in the sample extraction process and shortening the sample extraction time.
In some embodiments of the present invention, referring to fig. 1, the filter membrane 230 is horizontally disposed in the filter membrane tube 200, and since the water sample passes through the vacuum pump 300 under the negative pressure from top to bottom, the filter membrane 230 is horizontally disposed to make the filter membrane 230 contact the perforated support plate 140 more sufficiently, so as to avoid the phenomenon that the membrane surface is cracked due to the uneven stress on the filter membrane 230.
In some embodiments of the present invention, referring to fig. 1, the perforated support plate 140 and the suction filtration tube 100 are integrally formed. Optionally, the supporting plate 140 with holes may also be an independent part, and in the sample filtration stage, the supporting plate 140 with holes is first placed into the suction filter tube 100, and then the membrane filter tube 200 is placed into the suction filter tube 100, so as to support the membrane filter 230, and prevent the membrane filter 230 from being damaged in the suction filtration process.
The utility model discloses an in some embodiments, be provided with a plurality of round holes on foraminiferous backup pad 140, a plurality of round holes are arranged into a plurality of rings, and every ring is concentric and equidistant to be arranged, and a plurality of round holes evenly distributed on the circumference of each ring, at the suction filtration in-process, the even distribution of the negative pressure that comes from flowing back passageway 120 that evenly distributed's round hole can make is on filter membrane 230, avoids filter membrane 230 to lead to the membrane face to appear damaged at the inhomogeneous pressure that the suction filtration in-process received.
In some embodiments of the utility model, referring to fig. 1, drainage channel 120 is leaks hopper-shaped, and the diameter of foraminiferous backup pad 140 and drainage channel 120's maximum diameter phase-match, so set up, can make foraminiferous backup pad 140's area be greater than the area of filter membrane 230 for filter membrane 230 whole face all contacts and filters on foraminiferous backup pad 140, improves filtration efficiency, shortens filter time. Alternatively, when the perforated support plate 140 is a separate component, this arrangement allows the perforated support plate 140 to be placed directly into the suction tube 100 without any additional fastening means after being installed into the suction tube 100.
In some embodiments of the present invention, referring to fig. 1, a first inner screw thread 150 is disposed on the inner wall of the suction filtration tube 100, and a first outer screw thread 240 matching the first inner screw thread 150 is disposed on the outer wall of the filter membrane tube 200. Because the bottom of filter membrane pipe 200 is in negative pressure state in filtering process, fix filter membrane pipe 200 on suction filter pipe 100 through the screw thread, avoid filter membrane pipe 200 to appear rocking at the suction filter in-process, make whole device more reliable at the operation in-process.
In some embodiments of the present invention, referring to fig. 2, a second inner screw 420 matched with the first outer screw 240 is provided on the inner wall of the filter membrane extraction tube 400, a second outer screw 430 is provided on the outer wall, and a third inner screw 510 matched with the second outer screw 430 is provided on the inner wall of the extraction tube cap 500. In the extraction stage, need with filter membrane tube 200 fixed back in filter membrane extraction tube 400, vibrate or supersound and draw, make the device more stable through threaded connection, can not make filter membrane tube 200 rock in filter membrane extraction tube 400 and lead to two tub of collisions to produce cracked phenomenon.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (8)
1. A filtering and enriching device for microcystin in water is characterized by comprising:
the suction filter tube is provided with a first inner cavity, one end of the first inner cavity is connected with a liquid drainage channel, the side wall of the liquid drainage channel is provided with a suction tube, and a supporting plate with a hole is arranged between the liquid drainage channel and the first inner cavity;
the filter membrane comprises a filter membrane tube, a liquid inlet and a filter membrane, wherein one end of the filter membrane tube is provided with a liquid inlet, the other end of the filter membrane tube is provided with a filter membrane, a liquid inlet channel is arranged in the filter membrane tube, and the liquid inlet channel is communicated with the liquid inlet and the filter membrane;
a filter membrane extraction tube having a second lumen for receiving the filter membrane tube;
the extraction tube cover is connected with the filter membrane extraction tube to seal the second inner cavity;
wherein the air suction pipe is connected with a vacuum water pump, and the liquid discharge channel is connected with a sealed container; in the water sample filtering stage, the filter membrane pipe is positioned in the first inner cavity, the filter membrane is positioned above the supporting plate with the hole, and the vacuum water pump is started; and in the sample extraction stage, the filter membrane tube is fixedly connected with the filter membrane extraction tube.
2. The apparatus as claimed in claim 1, wherein the filter membrane is adhered to the inner wall of the filter membrane tube.
3. The apparatus as claimed in claim 2, wherein the filter membrane is horizontally disposed on the filter membrane tube.
4. The apparatus as claimed in claim 1, wherein the perforated support plate is integrally formed with the suction filtration tube, or the perforated support plate is movably connected to the suction filtration tube.
5. The apparatus as claimed in claim 4, wherein the perforated support plate has a plurality of circular holes, and the circular holes are arranged in a plurality of circular rings.
6. The apparatus as claimed in claim 4, wherein the drainage channel is funnel-shaped, and the diameter of the support plate with holes matches the maximum diameter of the drainage channel.
7. The device for filtering and enriching microcystin in water as claimed in claim 1, wherein the inner wall of said suction filter tube is provided with a first inner screw thread, and the outer wall of said filter membrane tube is provided with a first outer screw thread matching with said first inner screw thread.
8. The device for filtering and enriching microcystin in water as claimed in claim 7, wherein the inner wall of the filter membrane extraction tube is provided with a second inner screw thread matching with the first outer screw thread, the outer wall is provided with a second outer screw thread, and the inner wall of the extraction tube cover is provided with a third inner screw thread matching with the second outer screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020507053.3U CN212254812U (en) | 2020-04-08 | 2020-04-08 | Filtering and enriching device for microcystin in water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020507053.3U CN212254812U (en) | 2020-04-08 | 2020-04-08 | Filtering and enriching device for microcystin in water |
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| CN212254812U true CN212254812U (en) | 2020-12-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113155538A (en) * | 2021-04-13 | 2021-07-23 | 杭州电子科技大学 | Water sample collector for continuously extracting microcystin sample in freshwater environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113155538A (en) * | 2021-04-13 | 2021-07-23 | 杭州电子科技大学 | Water sample collector for continuously extracting microcystin sample in freshwater environment |
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