CN105148577B - The negative pressure suction type filter of aquatic products detection - Google Patents
The negative pressure suction type filter of aquatic products detection Download PDFInfo
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- CN105148577B CN105148577B CN201510390574.9A CN201510390574A CN105148577B CN 105148577 B CN105148577 B CN 105148577B CN 201510390574 A CN201510390574 A CN 201510390574A CN 105148577 B CN105148577 B CN 105148577B
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Abstract
The invention discloses the negative pressure suction type filter of a kind of aquatic products detection, aim to provide in the cavity that a kind of ambient atmos that can effectively solve to occur in vacuum enters evacuation, the negative pressure causing evacuation cavity is not enough, and affects the negative pressure suction type filter of the problem of the filtration of sample extracting solution.It includes vaccum-pumping equipment, has the main box of sealed internal chamber, the placement through hole being arranged on main box end face and communicating with the inner chamber of main box, is plugged in the cartridge filter and communication type airtight construction placed in through hole.
Description
Technical field
The present invention relates to aquatic products detection field, be specifically related to the negative pressure suction type filter of a kind of aquatic products detection.
Background technology
Along with the raising of people's living standard, while aquatic products production and consumption yield is greatly improved, the quality problems of aquatic products the most increasingly receive publicity；How to check the quality good or not of aquatic products, be the problem paid special attention to of consumer.According to relevant alimentary codex, food test regulation requirement, aquatic products need by the detection of the aspects such as organoleptic examination, physical examination, chemical analysis to ensure the quality safety of aquatic products.When aquatic products detect, after sample pre-treatments, the sample extracting solution of gained needs to use filter membrane just can carry out Instrumental Analysis after filtering.
The sample extracting solution defecator of current aquatic products generally uses the mode of negative pressure-pumping to carry out filtered sample extracting solution.As shown in Figure 4, the sample extracting solution defecator of current this kind of negative pressure suction type generally includes air pump, there is main box 1 and the cartridge filter 2 of sealed internal chamber, and the placement through hole communicated with the inner chamber of main box is set on main box end face, what cartridge filter can be taken off is plugged in placement through hole, and the bottom surface of cartridge filter is provided with filter membrane interlayer 3.Sample extracting solution is injected in cartridge filter by practical work process, and by air pump, the inner chamber of main box is carried out evacuation, so that the sample extracting solution in cartridge filter is through filter membrane, obtain detecting sample.The sample extracting solution defecator of current this kind of negative pressure suction type produces gas leakage in order to avoid placing during evacuation between through hole and cartridge filter, causes main box inner chamber vacuumizing effect the best；Common practice is to face the mountain to be provided with sealing ring inside placement through hole, after cartridge filter is plugged in placement through hole, is placing formation sealing between through hole and cartridge filter by sealing ring；But arranging sealing ring simply by between placement through hole and cartridge filter, its sealing effectiveness is the best；In main box inner chamber vacuum, along with the negative pressure of main box inner chamber increases, tend to produce the poor sealing placed between through hole and cartridge filter, cause ambient atmos to enter main box inner chamber, affect the filtration of sample extracting solution.On the other hand, in actual use, clean and dress sample owing to cartridge filter needs often to take out so that place the sealing ring between through hole and cartridge filter and loosen, produce gap, cause ambient atmos in main box inner chamber vacuum to enter main box inner chamber, affect the filtration of sample extracting solution.
Summary of the invention
The invention aims to overcome deficiency of the prior art, there is provided one the most easy to operate, and the ambient atmos that can effectively solve occur in vacuum enters in the cavity of evacuation, the negative pressure causing evacuation cavity is not enough, and affects the negative pressure suction type filter of the aquatic products detection of the problem of the filtration of sample extracting solution.
The technical scheme is that
A kind of negative pressure suction type filter of aquatic products detection, including vaccum-pumping equipment, there is the main box of sealed internal chamber, the placement through hole being arranged on main box end face and communicating with the inner chamber of main box, it is plugged in the cartridge filter and communication type airtight construction placed in through hole；Described placement through hole is circular hole, places through hole medial surface and is provided with sealing ring mounting groove；Described cartridge filter circular in cross-section, the upper and lower end opening of cartridge filter, it is provided with filter membrane interlayer in cartridge filter, the lateral surface top of cartridge filter is provided with collar stop, and collar stop is positioned at above placement through hole；Described communication type airtight construction includes being arranged on the inflation seal ring in sealing ring mounting groove and communication type cylinder body；The inner chamber of described communication type cylinder body is stepped, and the inner chamber of communication type cylinder body is made up of the first cavity being interconnected and the second cavity, and the cross-sectional area of the first cavity is more than the cross-sectional area of the second cavity；The first piston body of adaptation it is provided with in described first cavity, the second piston body of adaptation it is provided with in second cavity, and be connected by head rod between first piston body and the second piston body, near the one end open of first piston body on described communication type cylinder body, close near one end of the second piston body；Described first inside cavities face is provided with the first limited block, and first limited block and the second piston body be positioned at first piston body opposite sides, described second cavity is provided with the pretension compression spring that first piston body can be made to be resisted against on the first limited block, and pretension compression spring is positioned at the second piston body opposite sides with first piston body；Described communication type cylinder body lateral surface is provided with the first connector being connected with the first cavity, and first connector between first piston body and the second piston body, communication type cylinder body lateral surface is provided with the second connector being connected with the second cavity, and the second connector is positioned at the second piston body opposite sides with first piston body；Described main box lateral surface is provided with the 3rd connector and the pump orifice with main box intracavity inter-connection, annular inflatable inner chamber it is provided with in described inflation seal ring, inflation seal ring be provided with annular inflatable intracavity inter-connection fill exhaust nozzle, it is connected by the first connecting pipe between described first connector and the 3rd connector, described second connector is connected by the second connecting pipe between exhaust nozzle with filling, and is connected by third connecting pipeline between described vaccum-pumping equipment and pump orifice.
The negative pressure suction type filter of the aquatic products detection of this programme is the most easy to operate, and the ambient atmos that can effectively solve occur in vacuum enters in the cavity of evacuation, the negative pressure causing evacuation cavity is not enough, and the problem affecting the filtration of sample extracting solution.
As preferably, communication type cylinder body lateral surface is provided with the 4th connector being connected with the first cavity, and the 4th connector is between first piston body and the second piston body, is provided with electromagnetic switch valve at described 4th connector；Communication type cylinder body lateral surface is provided with the 5th connector being connected with the second cavity, and the 5th connector is positioned at the second piston body opposite sides with first piston body, is provided with electromagnetic switch valve at described 5th connector；Described main box lateral surface is provided with the 6th connector with main box intracavity inter-connection, is provided with electromagnetic switch valve at described 6th connector.
As preferably, the second inside cavities face is provided with the second limited block, and the second limited block is between the second piston body and the second connector.
As preferably, also including the sample storage container of upper end open, the lower end of described cartridge filter is provided with the flow guide sleeve that cross-sectional area is gradually reduced from top to bottom, is provided with link below flow guide sleeve, and this link is connected with flow guide sleeve by the second connecting rod；Described sample storage container may pass through described placement through hole, and the upper end of sample storage container is provided with hook；After sample storage container is hung on link by hook, the lower port of described flow guide sleeve is positioned at the upper end open of sample storage container.
As preferably, filter membrane interlayer is positioned at cartridge filter bottom.
The invention has the beneficial effects as follows: the most easy to operate, and the ambient atmos that can effectively solve occur in vacuum enters in the cavity of evacuation, the negative pressure causing evacuation cavity is not enough, and the problem affecting the filtration of sample extracting solution.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the negative pressure suction type filter of the aquatic products detection of the present invention.
Fig. 2 is the partial enlarged drawing in Fig. 1 at A.
Fig. 3 is the partial enlarged drawing in Fig. 1 at B.
Fig. 4 is a kind of structural representation of the sample extracting solution defecator of aquatic products of the prior art.
In figure: main box 1, cartridge filter 2, filter membrane interlayer 3, 3rd connector 4, first connecting pipe 5, second connecting pipe 6, communication type cylinder body 7, first cavity 8, first connector 9, second cavity 10, second connector 11, 5th connector 12, pretension compression spring 13, second limited block 14, second piston body 15, electromagnetic switch valve 16, 4th connector 17, head rod 18, first piston body 19, first limited block 20, sample storage container 21, 6th connector 22, pump orifice 23, flow guide sleeve 24, collar stop 25, fill exhaust nozzle 26, place through hole 27, inflation seal ring 28, annular inflatable inner chamber 29, hook 30, link 31.
Detailed description of the invention
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings:
As shown in Figure 1 and Figure 2, the negative pressure suction type filter of a kind of aquatic products detection includes vaccum-pumping equipment, sample storage container 21, there is the main box 1 of sealed internal chamber, the placement through hole 27 being arranged on main box end face and communicate with the inner chamber of main box, is plugged in the cartridge filter 2 and communication type airtight construction placed in through hole.Vaccum-pumping equipment is air pump.
As shown in Figure 1, Figure 3, placing through hole is circular hole.Place through hole medial surface and be provided with sealing ring mounting groove.Cartridge filter circular in cross-section.The upper and lower end opening of cartridge filter.The lateral surface top of cartridge filter is provided with collar stop 25, and collar stop is positioned at above placement through hole.Filter membrane interlayer 3 it is provided with in cartridge filter.Filter membrane interlayer is positioned at cartridge filter bottom.The lower end of cartridge filter is provided with the flow guide sleeve 24 that cross-sectional area is gradually reduced from top to bottom.It is provided with link 31 below flow guide sleeve, and this link is connected with flow guide sleeve by the second connecting rod.The upper end open of sample storage container.Sample storage container may pass through described placement through hole.The upper end of sample storage container is provided with hook 30.Sample storage container is hung on link by hook.After sample storage container is hung on link by hook, the lower port of flow guide sleeve is positioned at the upper end open of sample storage container.
As shown in Figure 1 and Figure 2, communication type airtight construction includes inflation seal ring 28 and the communication type cylinder body 7 being arranged in sealing ring mounting groove.The inner chamber of communication type cylinder body is stepped.The inner chamber of communication type cylinder body is made up of the first cavity 8 being interconnected and the second cavity 10, and the cross-sectional area of the first cavity is more than the cross-sectional area of the second cavity.The first piston body 19 of adaptation it is provided with in first cavity.It is provided with the second piston body 15 of adaptation in second cavity, and is connected by head rod 18 between first piston body and the second piston body.The cross-sectional area of first piston body is more than the cross-sectional area of the second piston body.Near the one end open of first piston body on communication type cylinder body, close near one end of the second piston body.First inside cavities face is provided with the first limited block 20, and the first limited block and the second piston body are positioned at first piston body opposite sides.Second cavity is provided with the pretension compression spring 13 that first piston body can be made to be resisted against on the first limited block, and pretension compression spring is positioned at the second piston body opposite sides with first piston body.
Communication type cylinder body lateral surface is provided with the first connector 9 being connected with the first cavity, and the first connector is between first piston body and the second piston body.Communication type cylinder body lateral surface is provided with the second connector 11 being connected with the second cavity, and the second connector is positioned at the second piston body opposite sides with first piston body.Second inside cavities face is provided with the second limited block 14, and the second limited block is between the second piston body and the second connector.Communication type cylinder body lateral surface is provided with the 4th connector 17 being connected with the first cavity, and the 4th connector is between first piston body and the second piston body.It is provided with electromagnetic switch valve 16 at 4th connector.Communication type cylinder body lateral surface is provided with the 5th connector 12 being connected with the second cavity, and the 5th connector is positioned at the second piston body opposite sides with first piston body.It is provided with electromagnetic switch valve at 5th connector.Main box lateral surface is provided with the 3rd connector 4 with main box intracavity inter-connection and pump orifice 23.Main box lateral surface is provided with the 6th connector 22 with main box intracavity inter-connection.It is provided with electromagnetic switch valve at 6th connector.Annular inflatable inner chamber 29 it is provided with in inflation seal ring.Inflation seal ring be provided with annular inflatable intracavity inter-connection fill exhaust nozzle 26.It is connected by the first connecting pipe 5 between first connector and the 3rd connector.Second connector is connected by the second connecting pipe 6 between exhaust nozzle with filling.It is connected by third connecting pipeline between vaccum-pumping equipment with pump orifice.
The specific works process of the negative pressure suction type filter of the aquatic products detection of the present embodiment is as follows:
First, sample storage container is hung on link by hook；The most again sample storage container and cartridge filter are passed and place through hole, till collar stop is resisted against on main box；
Second, sample extracting solution to be filtered is injected in cartridge filter, and the electromagnetic switch valve at the four, the 5th and the 6th connector is closed；
3rd, open vaccum-pumping equipment and the inner chamber of main box is carried out evacuation；
Owing to the communication type inner chamber of cylinder block between first piston body and the second piston body is by the intracavity inter-connection of the first connecting pipe with main box, and the cross-sectional area of first piston body is more than the cross-sectional area of the second piston body；Thus air pressure between first piston body and the second piston body reduces in vacuum, the second piston body is made to move toward the second limited block direction, thus by the gas in communication type cylinder body by intracavity in the annular inflatable of the second connecting pipe press-in inflation seal ring, make inflation seal ring expand, and then ensure that inflation seal ring at cartridge filter and places formation sealing reliably between through hole；And along with the negative pressure of main box inner chamber increases, in the annular inflatable of inflation seal ring, the air pressure of intracavity increases the most therewith, thus it is further ensured that inflation seal ring at cartridge filter and places formation sealing reliably between through hole, effectively solve to clean and dress sample because cartridge filter needs often to take out, the sealing ring placing between through hole and cartridge filter is made to loosen, produce gap, and affect cartridge filter and the sealing reliability placed between through hole, and along with the negative pressure of main box inner chamber increases, the problem tending to produce the poor sealing placed between through hole and cartridge filter.
Sample extracting solution the most to be filtered passes through filter membrane interlayer, and flows in sample storage container.
4th, after sample extracting solution to be filtered in cylinder to be filtered has filtered, vaccum-pumping equipment is closed, electromagnetic switch valve at four, the 5th and the 6th connector is opened simultaneously, so that first piston body and the second piston body reset under the effect of pretension compression spring, for filtering preparation next time.
Claims (6)
1. the negative pressure suction type filter of an aquatic products detection, it is characterized in that, including vaccum-pumping equipment, there is the main box of sealed internal chamber, the placement through hole being arranged on main box end face and communicate with the inner chamber of main box, is plugged in the cartridge filter and communication type airtight construction placed in through hole；
Described placement through hole is circular hole, places through hole medial surface and is provided with sealing ring mounting groove；Described cartridge filter circular in cross-section, the upper and lower end opening of cartridge filter, it is provided with filter membrane interlayer in cartridge filter, the lateral surface top of cartridge filter is provided with collar stop, and collar stop is positioned at above placement through hole；
Described communication type airtight construction includes being arranged on the inflation seal ring in sealing ring mounting groove and communication type cylinder body；The inner chamber of described communication type cylinder body is stepped, and the inner chamber of communication type cylinder body is made up of the first cavity being interconnected and the second cavity, and the cross-sectional area of the first cavity is more than the cross-sectional area of the second cavity；The first piston body of adaptation it is provided with in described first cavity, the second piston body of adaptation it is provided with in second cavity, and be connected by head rod between first piston body and the second piston body, near the one end open of first piston body on described communication type cylinder body, close near one end of the second piston body；
Described first inside cavities face is provided with the first limited block, and first limited block and the second piston body be positioned at first piston body opposite sides, described second cavity is provided with the pretension compression spring that first piston body can be made to be resisted against on the first limited block, and pretension compression spring is positioned at the second piston body opposite sides with first piston body；
Described communication type cylinder body lateral surface is provided with the first connector being connected with the first cavity, and first connector between first piston body and the second piston body, communication type cylinder body lateral surface is provided with the second connector being connected with the second cavity, and the second connector is positioned at the second piston body opposite sides with first piston body；Described main box lateral surface is provided with the 3rd connector and the pump orifice with main box intracavity inter-connection, annular inflatable inner chamber it is provided with in described inflation seal ring, inflation seal ring be provided with annular inflatable intracavity inter-connection fill exhaust nozzle, it is connected by the first connecting pipe between described first connector and the 3rd connector, described second connector is connected by the second connecting pipe between exhaust nozzle with filling, and is connected by third connecting pipeline between described vaccum-pumping equipment and pump orifice.
The negative pressure suction type filter of aquatic products the most according to claim 1 detection, it is characterized in that, described communication type cylinder body lateral surface is provided with the 4th connector being connected with the first cavity, and the 4th connector between first piston body and the second piston body, be provided with electromagnetic switch valve at described 4th connector；Communication type cylinder body lateral surface is provided with the 5th connector being connected with the second cavity, and the 5th connector is positioned at the second piston body opposite sides with first piston body, is provided with electromagnetic switch valve at described 5th connector；Described main box lateral surface is provided with the 6th connector with main box intracavity inter-connection, is provided with electromagnetic switch valve at described 6th connector.
The negative pressure suction type filter of aquatic products the most according to claim 1 detection, is characterized in that, described second inside cavities face is provided with the second limited block, and the second limited block is between the second piston body and the second connector.
4. the negative pressure suction type filter detected according to the aquatic products described in claim 1 or 2 or 3, it is characterized in that, also include the sample storage container of upper end open, the lower end of described cartridge filter is provided with the flow guide sleeve that cross-sectional area is gradually reduced from top to bottom, it is provided with link below flow guide sleeve, and this link is connected with flow guide sleeve by the second connecting rod；Described sample storage container may pass through described placement through hole, and the upper end of sample storage container is provided with hook.
The negative pressure suction type filter of aquatic products the most according to claim 4 detection, is characterized in that, described after sample storage container is hung on link by hook, the lower port of described flow guide sleeve is positioned at the upper end open of sample storage container.
6. the negative pressure suction type filter detected according to the aquatic products described in claim 1 or 2 or 3, is characterized in that, described filter membrane interlayer is positioned at cartridge filter bottom.
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| CN201510390574.9A CN105148577B (en) | 2015-07-01 | 2015-07-01 | The negative pressure suction type filter of aquatic products detection |
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| CN201510390574.9A CN105148577B (en) | 2015-07-01 | 2015-07-01 | The negative pressure suction type filter of aquatic products detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106483001B (en) * | 2016-09-27 | 2019-01-29 | 浙江省海洋水产研究所 | A kind of Suction filtration device for extracting saxitoxin |
| CN106353168B (en) * | 2016-09-27 | 2019-01-25 | 浙江省海洋开发研究院 | For detecting the solid-liquid separating equipment of irradiation aquatic products derivative |
| CN106525555B (en) * | 2016-09-27 | 2019-01-25 | 浙江省海洋开发研究院 | Irradiate the derivative analyte detection pretreatment unit of aquatic products |
| CN108043103B (en) * | 2017-12-15 | 2019-11-22 | 洋浦宇顺航空燃料有限公司 | A kind of equipment for separating liquid from solid for industrial chemicals |
| CN110171588B (en) * | 2019-06-21 | 2021-08-20 | 中粮（成都）粮油工业有限公司 | Rice vacuum packaging machine with accurate metering |
| CN115155313B (en) * | 2022-07-05 | 2023-07-25 | 江苏省淡水水产研究所 | Batch filtering device for aquatic product detection |
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| DE2460033C3 (en) * | 1974-12-19 | 1978-10-12 | Gewerkschaft Eisenhuette Westfalia, 4670 Luenen | Device for draining concrete on the pressure ring of a shield driving machine |
| CN201427963Y (en) * | 2009-06-23 | 2010-03-24 | 农业部南京农业机械化研究所 | Marsh-gas anaerobic dry-type fermenting device |
| CN202209444U (en) * | 2011-09-08 | 2012-05-02 | 辽阳友信制药机械科技有限公司 | Sanitary-level ball overhead valve |
| CN102620533A (en) * | 2012-03-19 | 2012-08-01 | 马文 | Inflatable-seal-type cross-flow drying oven with dual drying cars |
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