CN205832769U - A kind of zooplankton classified filtering device - Google Patents

Abstract

The utility model discloses a grading filtering device for zooplankton, which comprises a grading filtering device body. The grading filtering device body includes a support and a multi-stage filtering cylinder arranged on the support. The support is provided with a filtrate tube. There is a suction filter port on the filtrate pipe, each of the filter cylinders communicates with the filtrate pipe through a liquid discharge valve, and a multi-layer filter plate is inserted inside the filter cylinder, and the filter plate is A filter membrane is laid. The zooplankton grading filtering device has a simple structure and is easy to operate. It can be carried out in both the shipboard laboratory and the shore laboratory. It has a wide range of applications and can effectively achieve accurate analysis of the zooplankton particle size group community; The filter cartridge can filter multiple groups at the same time by using multi-channel filter holes, so it can process a large number of zooplankton samples.

Description

A zooplankton grading filter device

technical field

The utility model relates to the technical field of filtering devices, in particular to a grading filtering device for zooplankton.

Background technique

In aquatic ecosystems, there is a strong correlation between trophic level and individual size because the growth and metabolic rate of organisms are affected by the particle size of the organism. However, complex food web structures and physical oceanographic features limit estimates of biomass and productivity for individual species. As a non-categorical analysis method, biomass spectrum has been used to study the structure and function of marine ecosystems. Every individual zooplankton in the marine ecosystem can be assigned to one of a series of particle size groups. Analyzing the structure of zooplankton functional groups based on particle size groups can reduce the complex ecosystem to an operational level, which is more conducive to the analysis of the functional groups and energy flow of the ecosystem. Therefore, the hierarchical filtering of zooplankton is the key to the analysis of the functional groups and energy flow of the ecosystem.

Chinese patent document (announcement date: August 6, 2014, announcement number: CN 203754438U) a device for treating the bottom flow and floating matter of conical mother liquor tank, which is classified by S1 conical mother liquor tank, S3 mother liquor tank, S5 evaporator and S6 Unit composition, in which S1 and S6 are connected through an underflow pump, S3 is connected with S5 through a large mother liquid pump, and S6 is connected with a flat plate and a decomposition tank. Compared with the original process, the device provided by the utility model no longer needs a special mother liquor pump to send the diluted mother liquor to the classifier, and the bottom flow of the conical mother liquor tank does not need to go to the overflow tank, so the overflow pump does not need to run all the time, and the leaf filter Machines and other auxiliary equipment can also be no longer used, which not only simplifies the process and facilitates operation, but also greatly saves energy consumption and investment.

Chinese patent document (announcement date: May 22, 2013, announcement number: CN202942725U) discloses a portable grading filter device applicable to collecting phytoplankton. It includes a fixed outer sleeve. The top of the fixed outer sleeve is provided with a water inlet and the bottom is provided with a drain outlet. There are several membrane-changing filters connected in series in the fixed outer sleeve. The outlet of the previous membrane-changing filter is connected to the The water inlet of the next membrane-changing filter is connected so that several membrane-changing filters are connected in series, and the filter membrane pore size in the membrane-changing filter gradually becomes smaller, and the water inlet of the first membrane-changing filter passes through the fixed The water inlet of the outer sleeve is connected to the injection joint of the syringe, and the outlet of the last membrane-changing filter is connected to the drain of the fixed outer sleeve. The shape of the fixed outer sleeve is adapted to the shape of the membrane-changing filter so that the fixed outer sleeve The sleeve fixes the membrane-changing filter, and the fixed outer sleeve is detachably opened to take out the membrane-changing filter inside it. The utility model can quickly and accurately collect phytoplankton of different particle sizes at one time, and the operation is simple.

Chinese patent document (announcement date: December 16, 2015, announcement number: CN 105158023A) is a self-control type classification filtration water suspended matter collection device, which belongs to the field of environmental monitoring, environmental governance and computer control technology, and involves in water bodies such as reservoirs Collection of suspended matter samples. It is mainly composed of suspended solids collector, upper computer, single-chip control unit, 24V DC pump, electromagnetic flowmeter, pressure sensor, turbidity sensor, sealed box, 5V DC power supply, and 24V DC power supply. The scaled cable is wound on the spool and connected to the suspended matter collector through the suspension ring. The upper computer is connected to the single-chip control unit through the cable, and the 24V DC power supply is connected to the 24V DC water pump, pressure sensor and turbidity sensor through the cable. , Electromagnetic flowmeter connected. The automatic control operation of the suspended solids collector simplifies the sampling process, and the rotary inflow and hierarchical storage technology optimizes the problem of filter clogging, realizes fidelity and classified collection of suspended solids in water, and improves sampling efficiency and accuracy.

Utility model content

The purpose of the utility model is to provide a zooplankton particle size classification filtering device with simple structure, convenient operation and wide application range in order to realize the community structure analysis of zooplankton particle size groups, zooplankton functional group analysis, and trophic level analysis.

The technical solution adopted by the utility model to achieve its technical purpose is: a grading filtering device for zooplankton, including a grading filtering device body, and the grading filtering device body includes a bracket and a multi-stage filtering cylinder arranged on the bracket. The support is provided with a filtrate tube, and the filtrate tube has a suction filter port, and each of the filter cylinders communicates with the filtrate tube through a drain valve, and a multi-layer filter is inserted inside the filter cylinder. A filter plate, where a filter film is laid on the filter plate. The zooplankton grading filter device adopts a brand-new design for the structure of the multi-stage filter cylinder, the filter cylinder and the filter plate are connected by plugging, and the filter plate is provided with a filter film. When analyzing the community structure of the zooplankton particle size group, standard zooplankton large nets and zooplankton medium nets were used to take samples from the bottom of the seabed to the surface of the water at each sampling station, and the samples after sampling were stored in formalin sea water. In the laboratory, the zooplankton is filtered with a multi-stage filter cylinder, and filter membranes with different pore sizes are respectively inserted inside the filter cylinder to filter and classify the samples. Since there are plug-in filter plates, this structure can According to the needs of filtration classification, filter membranes with different filter holes can be set to achieve multi-stage graded filtration inside a filter cylinder, and at the same time, it is possible to classify aquatic animals in different waters inside multiple filter cylinders on a support. Filtering to simultaneously analyze the community structure of zooplankton particle size groups. The zooplankton grading filtering device has simple structure, convenient operation and wide application range, and can effectively realize accurate analysis of zooplankton particle size groups and communities.

Preferably, the filter plate has a stepped structure and is plugged in with the filter cylinder in a pull-out manner, and the filter cylinder is provided with a plurality of pull-out openings, and the pull-out opening is provided with a sealing cover. A multi-layer overlapping platform is arranged inside the filter cylinder on the side opposite to the drawing opening. The filter plate adopts a stepped structure to achieve better filtration analysis of zooplankton in the same particle size community, because the individual zooplankton in the same particle size community is different, and the planar filtration method is likely to make the same The zooplankton of the particle size are filtered to the next layer, and are divided into the next particle size community, and the use of the ladder structure can keep the irregular individuals in the same particle size community in this layer, because in the filtration process Among them, the irregular shape will be flipped along the stepped filter plate, and will not be filtered directly to the next level, and the filter plate is plugged in with the filter cylinder, which is convenient for replacement, and it is more convenient to adjust the filter membrane according to the experimental results. Pore size for accurate analysis to estimate the productivity of each functional group.

As a preference, the filter holes of the filter membranes on each filter plate are successively reduced, and each layer of filter membranes is a double-layer membrane. The filter holes of the filter membrane on the filter plate adopt a decreasing structure to realize step-by-step filtration, and the filter membrane adopts a double-layer membrane, which can protect the use effect of the filter membrane.

Preferably, the filter holes on the filter plate are larger than the filter holes on the filter membrane. Such a structure is convenient for the zooplankton of the next level of functional group to pass through and stay on the filter membrane after a new level of filtration.

Preferably, the filter cylinder has a cone structure, and the cross section of the filter cylinder has a trapezoidal structure. The above-mentioned structure of the filter cylinder is to further protect the effect of graded filtration, and is more conducive to accurate detection and analysis of experimental data.

Preferably, the bracket is a stainless steel connecting bracket, the filtrate tube is a flexible connection structure, and the filtrate tube corresponding to each filter cylinder is respectively provided with a sealed connection structure. The filtrate tube is connected with a movable seal, so that the filter cylinder can be selected according to the number of filtered samples, and it is more convenient to place the bracket according to the test bench.

Preferably, a transition bottle and a vacuum pump are also included, and the vacuum pump is connected to the suction filter port and the transition bottle respectively. It is equipped with a non-polluting oil-free piston vacuum pump and a high-temperature sterilizable liquid storage bottle. The entire filter system can be placed safely and operated efficiently in laboratories, clean rooms, and ultra-clean workbenches.

The beneficial effects of the utility model are: the zooplankton grading filtering device has a simple structure and is easy to operate, and can be carried out in both the shipboard laboratory and the shore laboratory, has a wide range of applications, and can effectively realize accurate analysis of the zooplankton particle size group community ; During the filtration process, multi-stage filter cartridges are used, and multi-channel filter holes can be used to filter multiple groups at the same time. Therefore, a large number of zooplankton samples can be processed.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model zooplankton grading filtering device;

Fig. 2 is an enlarged schematic view of a perspective structure of the filter cylinder in the utility model;

Fig. 3 is a kind of structure enlarged schematic diagram of filter plate among the utility model;

Fig. 4 is a kind of structure enlarged schematic diagram of filter film of the present invention;

In the figure: 1. Classified filter body, 2. Support, 3. Filter cylinder, 4. Filtrate pipe, 5. Suction filter port, 6. Drain valve, 7. Filter plate, 8. Filter membrane, 9. Suction Pull mouth, 10, sealing cap, 11, lap joint platform, 12, sealing connection structure, 13, transition bottle, 14, vacuum pump.

detailed description

The technical solution of the utility model will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

Example 1:

In the embodiment shown in Fig. 1, a kind of zooplankton grading filtering device comprises grading filtering device body 1, and grading filtering device body 1 comprises support 2 and the multi-stage filtering cylinder 3 that is arranged on support 2, on support 2 A filtrate pipe 4 is provided, and there is a suction filter port 5 on the filtrate pipe 4, and each filter cylinder 3 communicates with the filtrate pipe 4 through a drain valve 6, and a multi-layer filter plate 7 is inserted inside the filter cylinder 3, and the filter plate 7 is laid with filtering membrane 8.

The filter plate 7 has a stepped structure (see Figure 3) and is plugged in with the filter cylinder 3 in a pull-out manner. The filter cylinder 3 is provided with a plurality of pull-out ports 9, and the pull-out port 9 is provided with a sealing cover 10. A multi-layer overlapping platform 11 is provided inside the filter cylinder 3 on the side opposite to the drawing opening 9 (see FIG. 2 ).

The filter holes of the filter films 8 on each filter plate 7 are successively reduced and the filter holes of each layer of filter films 8 are double-layer filter holes (see FIG. 4 ). The filter holes on the filter plate 7 are larger than the filter holes on the filter membrane 8 .

The filter cylinder 3 is in a cone structure, and the cross section of the filter cylinder 3 is in a trapezoidal structure.

The support 2 is a stainless steel movable support, the filtrate pipe 4 is a movable connection structure, and the filtrate pipe 4 corresponding to each filter cylinder 3 is respectively provided with a sealing connection structure 12 .

A transition bottle 13 and a vacuum pump 14 are also included, and the vacuum pump 14 is connected to the suction filter port 5 and the transition bottle 13 respectively.

The zooplankton grading filter device, through a new design of the structure of the multi-stage filter cylinder 3, the filter cylinder 3 and the filter plate 7 are connected by plugging, the filter plate 7 is provided with a filter film 8, and the filter plate 7 adopts a ladder In this way, a better filtration analysis of zooplankton in the same particle size community can be achieved, because the individual zooplankton in the same particle size community is different, and the planar filtration method is likely to make the same particle size zooplankton Animals are filtered to the next layer and classified into the next particle size group, and the use of a ladder structure can keep irregular individuals in the same particle size group in this layer, because in the filtering process, there are different The regular shape will flip along the stepped filter plate instead of being filtered directly to the next level, and the filter plate is plugged in with the filter cylinder, which is convenient for replacement and more convenient to adjust the pore size of the filter membrane according to the experimental results. Analyze and estimate the productivity of each functional group.

When it is necessary to analyze the community structure of zooplankton particle size groups in different waters, the standard zooplankton large net (net opening diameter 0.8 m, mesh diameter 505 μm) and zooplankton medium net (net opening diameter 0.5 m, net diameter Hole diameter 160 µm) was sampled by vertical trawling from the seabed to the surface at each sampling station. Samples were stored in 5% formalin seawater in a volume of 1000ml.

Zooplankton filtration, in the laboratory, divide 1000ml sample into 2 parts, a 500ml zooplankton is filtered and graded with multi-stage filter cartridges with pore diameters of 2 mm, 1 mm, 0.5 mm, 0.25 mm and 0.16 mm respectively, Then filter the sample obtained after classification onto the glass fiber filter membrane (Whatman GF/C) that has been weighed and calcined (450ºC) in advance, and maintain a certain suction pressure of 0.1-0.2 mpa during the filtration, so that the filter membrane does not After being broken, it can be quickly filtered, and then the filtrate is quickly rinsed with deionized water, placed in an oven, dried at 60°C for 24-36h, and dried in a desiccator for storage. After returning to the shore, weigh with an electronic balance with a sensitivity of 0.01 mg, and subtract the initial weight of the filter membrane to obtain the dry weight values of different particle size groups.

Due to the plug-in filter plate, this structure can set filter membranes with different filter holes according to the needs of filtration classification, and can realize multi-stage classification filtration inside a filter cylinder, while multiple Inside the filter cylinder, it is possible to perform hierarchical filtration of aquatic animals in different water areas, so as to analyze the community structure of zooplankton particle size groups at the same time. The zooplankton grading and filtering device has simple structure, convenient operation and wide application range, and can effectively realize accurate analysis of zooplankton particle size groups and communities.

Community structure analysis of zooplankton particle size group: Calculate the carbon content according to the obtained weight of each component, estimate the productivity of each functional group according to the empirical formula, and make a community structure distribution map.

The zooplankton grading filtration device is easy to operate and can be carried out in both the shipboard laboratory and the shore laboratory; in the filtration process, multi-filter equipment is used, and multi-channel filter holes can be used to filter multiple components at the same time. Therefore, Large batches of zooplankton samples can be processed.

Claims (7)

1. A hierarchical filtering device for zooplankton, including a hierarchical filtering device body (1), characterized in that: the hierarchical filtering device body (1) includes a bracket (2) and a multi-stage filter set on the bracket (2) The cylinder (3), the support (2) is provided with a filtrate tube (4), the filtrate tube (4) has a suction filter port (5), each of the filter cylinders (3 ) communicates with the filtrate pipe (4) through the drain valve (6), and a multi-layer filter plate (7) is inserted inside the filter cylinder (3), and a filter film is laid on the filter plate (7) (8). 2. A zooplankton grading filtering device according to claim 1, characterized in that: the filter plate (7) has a stepped structure and is plugged with the filter cylinder (3) in a pull-out manner, and the filter plate (7) The filter cylinder (3) is provided with a plurality of drawing ports (9), and the drawing port (9) is provided with a sealing cover (10), and the filter on the side opposite to the drawing port (9) A multi-layer overlapping platform (11) is arranged inside the cylinder body (3). 3. A zooplankton grading filtering device according to claim 1, characterized in that: the filter holes of the filter membranes (8) on each layer of filter plates (7) decrease in sequence and each layer of filter membranes (8) ) is a double-layer filter hole. 4. A zooplankton grading filtering device according to claim 3, characterized in that: the filter holes on the filter plate (7) are larger than the filter holes on the filter membrane (8). 5 . The zooplankton grading filtering device according to claim 1 , characterized in that: the filtering cylinder ( 3 ) is in a cone structure, and the cross section of the filtering cylinder ( 3 ) is in a trapezoidal structure. 6 . 6. A zooplankton grading filtering device according to claim 1 or 2 or 3 or 4 or 5, characterized in that: the support (2) is a stainless steel support, and the filtrate pipe (4) is a flexible connection structure, each filtering The filtrate tubes (4) corresponding to the cylinder body (3) are respectively provided with sealing connection structures (12). 7. A zooplankton grading filtering device according to claim 1 or 2 or 3 or 4, characterized in that it also includes a transition bottle (13) and a vacuum pump (14), and the vacuum pump (14) is connected with the pumping The filter port (5) is connected with the transition bottle (13).