CN219421949U - Sample collector for plankton net - Google Patents

Abstract

The utility model provides a sample collector for a plankton net. The sample collector comprises a tank body and a cover body, wherein the tank body is provided with an upper opening, the cover body is positioned at the upper end of the tank body, and the cover body is in sealing connection with the tank body; the cover body is provided with a sample injection unit, a drainage unit and a water filtering unit; the cavity formed by the tank body and the cover body is used for containing a sample. The sample collector can be used for back flushing the sampling filter screen by using more flushing water, and the organisms on the sampling filter screen can be collected after being completely flushed.

Description

Sample collector for plankton net

Technical Field

The utility model relates to a sample collector for a plankton net, and belongs to the technical field of ballast water.

Background

The current collection device of plankton net is shown in figure 1, which is a blind pipe with fixed volume installed at the bottom of net, and is usually composed of a water saving pipe and a valve, the water pipe at the upper part of the valve plays the role of quantitative collection; when sampling is performed, the tail end valve is closed to form a blind pipe; after the sampling process is finished, water is used for flushing the filter screen from the outside to the inside, organisms and the like collected by the filter screen gradually enter a blind pipe at the lower part under the action of water flow and gravity, and after the collection is finished, a valve is opened to release the samples into containers such as sample bottles and the like.

In the existing blind pipe collecting method, a sample is flushed by means of water flow from outside to inside and flows into a blind pipe under the action of gravity, the blind pipe is filled with liquid during sampling, the water flow flushed outside a later net can only form extremely limited local exchange on the surface of the blind pipe, most organisms slowly fall into the bottom of the blind pipe by means of self weight, so that the recovery rate of the sample is low, and most of the sample remains in a filter screen; the experienced sampling personnel can increase the recovery rate of the sample by repeatedly pouring out and filling the water in the blind pipe, but the method is troublesome and cannot achieve the complete recovery of the sample.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model provides a sample collector, which comprises a tank body and a cover body, wherein the tank body is provided with an upper opening, the cover body is positioned at the upper end of the tank body, and the cover body is in sealing connection with the tank body.

According to an embodiment of the utility model, the cavity formed by the tank and the cover is used for containing a sample, such as a plankton sample. Preferably, the tank body and the cover body are both cylindrical in shape.

Preferably, in order to facilitate observation of plankton in the cavity, the material of the tank is selected from transparent materials.

Preferably, the sealed connection is a detachable connection.

According to the embodiment of the utility model, the cover body is provided with the sample injection unit, the drainage unit and the water filtering unit. Preferably, the flushing water containing the plankton sample enters the cavity through the sample injection unit, the plankton sample is remained in the cavity after being filtered by the water filtering unit, and the flushing water after being filtered is discharged from the water discharging unit, so that the plankton sample is quantitatively collected.

According to an embodiment of the utility model, the upper end of the sample introduction unit is positioned outside the cavity; the lower end part of the sample injection unit is positioned in the cavity. Further, the lower end part of the sample injection unit is positioned close to the bottom of the tank body.

According to an embodiment of the present utility model, the drainage unit is provided at an upper end portion of the cover. Preferably, the drainage unit includes at least one drainage hole. Further, the drain holes are uniformly distributed on the outer side of the sample injection unit.

Preferably, the water filtering unit is located at a lower end portion of the cover body and below the water draining unit. Preferably, the water filtering unit is in sealing connection with the cover body.

According to an embodiment of the utility model, the water filter unit comprises at least a filter mechanism and/or a buffer mechanism.

Preferably, the water filtering unit comprises a filtering mechanism and a buffer mechanism, the filtering mechanism is in sealing connection with the cover body, and the buffer mechanism is located above the filtering mechanism and below the drainage unit.

Preferably, the buffer mechanism is a rigid water permeable material, and the rigid water permeable material plays a supporting role.

Preferably, the filter means is preferably a sieve, the smallest pore size on the sieve being no more than 50 μm.

According to an exemplary aspect of the present utility model, the sample collector includes a can body and a cover body, the can body is an upper opening, the cover body is located at an upper end of the can body, and the cover body is in sealing connection with the can body;

the cover body is provided with a sample injection unit, a drainage unit and a water filtering unit;

the sample injection unit penetrates through the water filtering unit, and the upper end part of the sample injection unit is positioned at the outer side of the cavity; the lower end part of the sample injection unit is positioned in the cavity;

the drainage unit comprises four drainage holes which are uniformly distributed on the outer side of the sample injection unit;

the water filtering unit comprises a filtering mechanism and a buffer mechanism, and the buffer mechanism is positioned above the filtering mechanism and below the drainage unit; the filtering mechanism is selected from a filter screen, and the filter screen is in sealing connection with the cover body; the minimum pore diameter of the filter screen is 50 mu m, and the buffer mechanism is made of rigid water permeable materials.

Advantageous effects

Compared with the prior art, the utility model has the advantages that:

1. the sample collector can be used for back flushing the sampling filter screen by using more flushing water, and the organisms on the sampling filter screen can be collected after being completely flushed.

2. The sample collector can prevent the loss of biological samples, collect high-concentration biological samples in a cavity with fixed volume, and realize quantitative collection of the biological samples;

3. the sample collector can be connected with the sampling filter screen through a plug-in structure, and is convenient to use.

4. The sample collector can be applied to sampling concentration of plankton with the ballast water of more than 50 microns, investigation of plankton in rivers, lakes and seas and detection of biological species in a cultivation water area.

Drawings

FIG. 1 is a schematic diagram of the connection of a sample collection and sampling screen according to the prior art; wherein, 11-sampling filter screen; 12-water pipe; 10-valve.

FIG. 2 is a cross-sectional view of a side of the sample collector of the present utility model; wherein, 1-a water inlet unit; 2-a drainage unit; 3-a cover; 4-a buffer mechanism; 5-a filtering mechanism; 6-junction; 7-a tank body;

FIG. 3 is a top view of the sample collector of the present utility model; 1-a water inlet unit; 2-a drainage unit; 3-cover.

FIG. 4 is a schematic illustration of the connection of a sample collector to a sampling screen according to the present utility model; 9-sample collector; 10-valve; 11-sampling filter screen.

Detailed Description

The technical scheme of the utility model will be further described in detail below with reference to specific embodiments. It is to be understood that the following examples are illustrative only and are not to be construed as limiting the scope of the utility model. All techniques implemented based on the above description of the utility model are intended to be included within the scope of the utility model.

Unless otherwise indicated, the starting materials and reagents used in the following examples were either commercially available or may be prepared by known methods.

The utility model provides a sample collector, as shown in fig. 2 and 3, which comprises a tank body 7 and a cover body 3, wherein the tank body 7 is provided with an upper opening, the cover body 3 is positioned at the upper end of the tank body 7, and the cover body 3 is in sealing connection with the tank body 7. Preferably, the cavity formed by the tank 7 and the cover 3 is used for containing plankton samples. Preferably, the tank 7 and the cover 3 are both cylindrical in shape.

According to one embodiment of the present utility model, the shape of the cavity may be selected from structures known in the art, such as a cylinder, a cube, or a cuboid.

According to one embodiment of the present utility model, in order to facilitate observation of plankton in the cavity, the material of the tank 7 is selected from transparent materials, such as glass or polymer. Preferably, the polymer is selected, for example, from PET, PP, PE.

In the utility model, the sealing connection means that the joint 6 of the tank body and the cover body is watertight.

According to one embodiment of the utility model, the sealing connection is a detachable connection, for example a threaded connection.

According to one specific embodiment of the present utility model, the cover 3 is provided with a sample feeding unit 1, a drainage unit 2 and a water filtering unit. Preferably, flushing water containing the plankton sample enters the cavity through the sample introduction unit 1, the plankton sample is remained in the cavity after being filtered by the filtering water unit, and the filtered flushing water is discharged from the water discharge unit 2, so that the plankton sample is quantitatively collected.

According to one embodiment of the present utility model, in order to facilitate the entry of plankton samples into the cavity, the upper end of the sample introduction unit 1 is located outside the cavity; the lower end part of the sample injection unit 1 is positioned in the cavity. Further, in order to better control the direction of the plankton sample entering the cavity, the lower end of the sample feeding unit 1 is located near the bottom of the tank 7. The sample injection unit is exemplified by a sample injection tube 1, the inner diameter of the sample injection tube 1 is not particularly limited in the present utility model, and the inner diameter known in the art may be selected.

According to an embodiment of the present utility model, the drain unit 2 is provided at the upper end of the cover 7 to facilitate draining of excess wash water in the chamber. Preferably, the drainage unit 2 comprises at least one drainage hole, for example four drainage holes. Further, the drain holes are uniformly distributed on the outer side of the sample injection unit. Further, the aperture of the drain hole is not particularly limited, and an aperture commonly used in the art may be selected, for example, not less than 1mm, and for example, 5mm.

According to one embodiment of the present utility model, the water filtering unit is located at the lower end of the cover 7 and below the water discharging unit 2. Preferably, the water filtering unit is in sealing connection with the cover 7.

According to one embodiment of the utility model, the water filtering unit comprises at least a filtering means 5 and/or a buffer means 4 in order to keep the planktonic sample as far as possible inside said cavity. In the utility model, the filtering mechanism 5 can be used for filtering plankton samples in the flushing water to ensure that plankton samples are reserved in the cavity, and the buffer mechanism 4 can be used for adjusting the discharge amount of the flushing water filtered by the filtering water unit to avoid extrusion of plankton caused by overlarge discharge amount of the flushing water in the cavity and discharge of plankton out of the cavity.

Preferably, the water filtering unit comprises a filtering mechanism 5 and a buffer mechanism 4, the filtering mechanism 5 is in sealing connection with the cover body, and the buffer mechanism 4 is located above the filtering mechanism 5 and below the drainage unit 2.

Preferably, the buffer mechanism 4 is a rigid permeable material, which may also play a supporting role, and the rigid permeable material is not particularly limited in the present utility model, and any rigid permeable material known in the art may be used, so long as water in the tank 7 can permeate and flow out through the drainage unit 2.

Preferably, the filtering means 5 are preferably sieves, the smallest pore size on the sieve being not more than 50 μm, for example 1 μm, 0.5 μm, 0.2 μm, 0.1 μm. In the present utility model, the minimum pore size on the screen is preferably not larger than the pore size of the screen used on the flush water sampling screen. In the utility model, the minimum aperture on the filter screen refers to the minimum aperture of a filter hole on the filter screen, and the minimum aperture of the filter hole is the length of the center point of the filter hole in any direction.

According to an exemplary embodiment of the present utility model, the sample collector includes a can 7 and a cap 3, the can 7 is an upper opening, the cap 3 is located at an upper end of the can 7, and the cap 3 is in sealing connection with the can 7;

the cover body 3 is provided with a sample introduction unit 1, a drainage unit 2 and a drainage unit;

the sample injection unit 1 penetrates through the water filtering unit, and the upper end part of the sample injection unit 1 is positioned at the outer side of the cavity; the lower end part of the sample injection unit is positioned in the cavity;

the drainage unit 2 comprises four drainage holes which are uniformly distributed on the outer side of the sample injection unit;

the water filtering unit comprises a filtering mechanism 5 and a buffer mechanism 4, wherein the buffer mechanism 4 is positioned above the filtering mechanism 5 and below the drainage unit 2; the filtering mechanism 5 is selected from a filter screen, and the filter screen is in sealing connection with the cover body; the minimum aperture of the filter screen is 50 mu m, and the buffer mechanism 4 is made of rigid water permeable material;

and flushing water containing the plankton sample enters the cavity through the sample injection unit, the plankton sample is reserved in the cavity after being filtered by the water filtering unit, and the filtered flushing water is discharged from the water discharge unit 2, so that the plankton sample is quantitatively collected.

Working principle:

as shown in fig. 4, the sample collector 9 is integrally inserted into the lower end of the sampling filter screen 11, the valve 10 is opened, the outside of the sampling filter screen 11 is washed by water, when washing, the washing water in the sampling filter screen is carried with plankton (or other target collecting objects) on the inner surface of the sampling filter screen into the cavity from the water inlet unit 1 of the sample collector 9, when the washing water fills the cavity of the sample collector 9, the excessive washing water is filtered by the filtering mechanism 5 and then enters the buffer mechanism 4, then the excessive washing water overflows by the water outlet unit 2, and the plankton in the washing water is intercepted by the filtering mechanism 5 and then remains in the cavity of the cage-shaped sample collector 9;

after the plankton on the inner surface of the sampling filter screen 11 is basically washed, the collection is stopped, at the moment, the sample collector 9 is fully vibrated, so that the plankton adhered on the filtering mechanism 5 enters the water in the cavity, the cover body 2 and the tank body 7 are unscrewed from the connecting part 6, and the collected plankton sample is poured into the sample bottle, so that the collection of the plankton is completed.

The embodiments of the present utility model have been described above. However, the present utility model is not limited to the above embodiment. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The sample collector is characterized by comprising a tank body and a cover body, wherein the tank body is provided with an upper opening, the cover body is positioned at the upper end of the tank body, and the cover body is in sealing connection with the tank body; the cover body is provided with a sample injection unit, a drainage unit and a water filtering unit; the cavity formed by the tank body and the cover body is used for containing a sample;

the upper end part of the sample injection unit is positioned at the outer side of the cavity; the lower end part of the sample injection unit is positioned in the cavity; the drainage unit is arranged at the upper end part of the cover body; the water filtering unit is positioned at the lower end part of the cover body and below the water draining unit.

2. The sample collector of claim 1 wherein the canister and cap are each cylindrical in shape.

3. The sample collector of claim 1 wherein the material of the canister is selected from transparent materials.

4. The sample collector of claim 1 wherein the sealed connection is a detachable connection.

5. The sample collector of claim 1 wherein the drain unit comprises at least one drain hole;

the drainage holes are uniformly distributed on the outer side of the sample injection unit.

6. The sample collector of claim 1 wherein the water filter unit is sealingly connected to the cover.

7. The sample collector of claim 1 wherein the water filtration unit comprises at least a filtration mechanism and/or a buffer mechanism.

8. The sample collector of claim 7 wherein the drainage unit comprises a filter mechanism and a buffer mechanism, the filter mechanism being sealingly connected to the cover, the buffer mechanism being located above the filter mechanism and below the drainage unit.

9. The sample collector of claim 7 wherein the buffer mechanism is a rigid water permeable material that acts as a support;

the filtering mechanism is a filter screen, and the minimum pore diameter on the filter screen is not more than 50 mu m.

10. The sample collector of any one of claims 1-9 wherein the sample introduction unit extends through the water filtration unit, the upper end of the sample introduction unit being located outside the cavity;

the drainage unit comprises four drainage holes which are uniformly distributed on the outer side of the sample injection unit;

the water filtering unit comprises a filtering mechanism and a buffer mechanism, and the buffer mechanism is positioned above the filtering mechanism and below the drainage unit; the filtering mechanism is selected from a filter screen, and the filter screen is in sealing connection with the cover body; the minimum pore diameter of the filter screen is 50 mu m, and the buffer mechanism is made of rigid water permeable materials.