CN203590860U - Shallow water plankton sampling net - Google Patents

Abstract

The utility model discloses a shallow-water plankton sampling net, which comprises a steel ring, a cylindrical net with openings at both ends, a connection structure, a flow meter, a net bottom pipe and at least one floating ball; one end of the net is connected with the steel ring, The other end of the net, the connection structure, the flow meter and the net bottom pipe are connected in sequence, and the floating ball is connected with the flow meter; the net is made of impermeable material. The utility model has the characteristics of high sampling efficiency, high calculation accuracy of water flow, reliable data basis for accurate calculation of aquatic organism abundance per unit volume, simple structure and wide application range.

Description

Shallow water plankton sampling net

technical field

The utility model relates to the field of sampling technology, in particular to a shallow water that can collect plankton in oceans and lakes, accurately measure the water flow into the net clothes, and provide a reliable data basis for accurately calculating the abundance of aquatic organisms per unit volume. Plankton sampling net.

Background technique

Plankton in waters is related to many factors such as hydrology, chemistry, biology, physics, etc., and is an indispensable scientific research object in environmental science, oceanography and other disciplines; quantitative research on plankton is widely used in the evaluation of ecological fishery resources in waters, pollution accidents, etc. research and other practical fields. Therefore, the development of a scientific and efficient plankton collection device has dual meanings of science and reality.

For the traditional type I plankton net in shallow water, the material of the net is the same specification silk as the net bottom sleeve (CQ14 (0.505mm), JP (0.507mm)). For the water flow in the net, a propeller-type flow counter needs to be attached to the net mouth, because the flow meter tied to the net mouth uses the calculation method of calculating the flow rate at one point and then multiplying the area of the entire net mouth to calculate the flow into the net. The inhomogeneity of the water flow in the net and the inhomogeneity of the flow rate cause inaccurate calculation results; therefore, this type of device has the defect of not being able to accurately measure the water flow into the net clothing, and further leads to the calculation of the biological abundance per unit volume of water. Inaccurate.

Chinese Patent Authorization Publication No.: CN202538453U, authorized publication date on November 21, 2012, discloses a plankton net consisting of a filter device and a receiving device, the filter device is composed of a support ring and a screen, the support ring Located on the top of the screen; the receiving device is composed of a fixed ring, a plexiglass funnel, a clamping device and a hose, the upper end of the plexiglass funnel is connected to the lower end of the screen through a fixed ring, and the hose is arranged At the lower end, the clamping device is arranged on the hose. The disadvantage of this utility model is that there is no flow meter, the flow velocity of water entering the net cannot be measured, and data support cannot be provided for calculating the abundance of aquatic organisms per unit volume.

Contents of the invention

The purpose of the invention of the utility model is to overcome the problem that the device in the prior art cannot measure the flow velocity of water entering the net, or cannot accurately measure the flow of water entering the net clothing, and provides a method that can collect floating water in oceans and lakes. Biology, a shallow water plankton sampling net that accurately measures the water flow into the net and provides a reliable data basis for the accurate calculation of the abundance of aquatic organisms per unit volume.

In order to achieve the above object, the utility model adopts the following technical solutions:

A shallow-water plankton sampling net, comprising a steel ring, a cylindrical net with openings at both ends, a connection structure, a flow meter, a net bottom pipe and at least one floating ball; one end of the net is connected to the steel ring, the other end of the net, The connecting structure, the flow meter and the net bottom pipe are connected in sequence, and the floating ball is connected with the flow meter; the net clothing is made of impermeable material.

The utility model fully considers the characteristics of water areas such as oceans and lakes. Under the premise of meeting the sampling requirements, a shallow water plankton sampling net that can accurately calculate the water flow entering the net is designed; the net of the present invention is If it is impermeable, all the water flowing into the net will pass through the flowmeter and flow out from the bottom pipe of the net, so the flow detected by the flowmeter is the flow of water flowing into the net and through the bottom pipe of the net, and the water flow of the collected sample And the detected water flow is consistent, so as to provide a reliable data basis for the accurate calculation of the abundance of aquatic organisms per unit volume. However, the usual net is a drainage structure, and the plankton is easy to flow out of the net, so the sampling efficiency is low and the measurement is inaccurate. The flow meter of the utility model is a water meter type flow meter.

The using method of the present utility model is as follows:

When collecting plankton, put the shallow water plankton sampling net of the present utility model into the water body, and under the action of the buoyancy of the floating ball, the measurement direction of the flowmeter is always consistent with the water flow; The impact force on the flowmeter, the flowmeter is not easy to damage;

As the sampling time prolongs, plankton continue to accumulate in the bottom tube of the net; after sampling, the shallow water plankton sampling net is pulled up from the water, and the collected samples can be taken out of the bottom tube of the net.

Therefore, the utility model has the characteristics of high sampling efficiency, high calculation accuracy of water flow, reliable data basis for accurate calculation of aquatic organism abundance per unit volume, simple structure and wide application range.

Preferably, the connection structure includes a flange connected to the flowmeter and a pressure ring connected to the flange, the end of the mesh clothing away from the end of the steel ring is located between the side of the flange and the pressure ring, the flange and the pressure ring The rings are connected by bolts.

Preferably, the net bottom pipe includes a nylon gauze and a metal mesh arranged outside the nylon gauze; the flow meter is connected to the front end of the net bottom pipe through a flange.

The net bottom pipe also includes a cylindrical connecting end, a funnel-shaped gathering end, several connecting posts between the connecting end and the gathering end, and a cover plate arranged at the lower end of the gathering end; on the connecting and gathering ends; the metal mesh is located on the connecting and gathering ends between the nylon gauze and the connecting post. The metal mesh has the function of supporting the nylon gauze, and the nylon gauze is not easy to be damaged by the impact of water flow.

Preferably, there are 2 to 4 floating balls, and the floating balls are connected to the flow meter through ropes.

Preferably, the steel ring has a diameter of 40 cm to 50 cm.

Preferably, the netting is made of impermeable canvas, and the length of the netting is 1 meter to 1.6 meters.

Therefore, the utility model has the following beneficial effects: (1) the sampling efficiency is high; (2) the calculation accuracy of the water flow is high, and a reliable data basis is provided for accurately calculating the abundance of aquatic organisms per unit volume; (3) the structure is simple and the scope of application wide.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

In the figure: steel ring 1, net clothing 2, connection structure 3, flow meter 4, mesh bottom pipe 5, floating ball 6, flange 7, pressure ring 8, metal mesh 9.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

The embodiment shown in Figure 1 is a shallow water plankton sampling net, comprising a steel ring 1, a cylindrical net 2 with two ends open, a connecting structure 3, a flow meter 4, a net bottom pipe 5 and a float 6; One end of the net is connected with the steel ring, the other end of the net, the connection structure, the flow meter and the net bottom pipe are connected in sequence, and the float is connected with the flow meter; the net is made of impermeable canvas. The float is connected to the flowmeter by a rope.

The connection structure includes a flange 7 connected to the flowmeter and a pressure ring 8 connected to the flange. The end of the netting away from the end of the steel ring is located between the side of the flange and the pressure ring. The flange and the pressure ring are passed through bolts. connected.

The net bottom pipe includes a nylon gauze and a metal mesh 9 outside the nylon gauze; the flow meter is connected to the front end of the net bottom pipe through a flange. The diameter of the steel ring is 50 cm. The net length is 1 meter.

The using method of the present utility model is as follows:

When collecting plankton, put the shallow water plankton sampling net of the present utility model into the water body, and under the action of the buoyancy of the floating ball, the measurement direction of the flowmeter is always consistent with the water flow; The impact force on the flowmeter, the flowmeter is not easy to damage;

As the sampling time prolongs, plankton continue to accumulate in the bottom tube of the net; after sampling, the shallow water plankton sampling net is pulled up from the water, and the collected samples can be taken out of the bottom tube of the net.

The falling speed is 0.5m/s, and the lifting speed is 0.5~0.8m/s. After a collection work is completed, the sampling net of the present utility model needs to be rinsed clean with fresh water for repeated use.

The net of the utility model is impermeable, and all the water flowing into the net will pass through the flow meter and flow out from the bottom pipe of the net, so the flow detected by the flow meter is the flow of water flowing into the net and through the bottom pipe of the net. The water flow volume where the sample is collected is consistent with the detected water flow, thereby providing a reliable data basis for accurate calculation of the aquatic biological abundance per unit volume.

It should be understood that this embodiment is only used to illustrate the utility model but not to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

Claims (6)

1. a neritic plankton sampling net, it is characterized in that, comprise tubular etting (2), syndeton (3), flowmeter (4), net bottom pipe (5) and at least one ball float (6) of steel ring (1), both ends open; Etting one end is connected with steel ring, and the etting other end, syndeton, flowmeter and net bottom pipe are connected successively, and described ball float is connected with flowmeter; Described etting adopts impermeable material to make.

2. neritic plankton sampling net according to claim 1, it is characterized in that, described syndeton comprises the flange (7) being connected with flowmeter and the trim ring (8) being connected with flange, etting is away from the end of steel ring one end between flange one side and trim ring, and flange is connected by bolt with trim ring.

3. neritic plankton sampling net according to claim 1, is characterized in that, described net bottom pipe comprises nylon gauze and is located at the wire netting (9) of nylon gauze outside; Flowmeter is connected with net bottom pipe front end by flange.

4. neritic plankton sampling net according to claim 1, is characterized in that, described ball float is 2 to 4, and ball float is connected with flowmeter by rope.

5. neritic plankton sampling net according to claim 1, is characterized in that, the diameter of described steel ring is 40 centimetres to 50 centimetres.

6. according to the neritic plankton sampling net described in claim 1 or 2 or 3 or 4 or 5, it is characterized in that, etting adopts fluid-tight canvas to make, and netting-length is 1 meter to 1.6 meters.

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