Marine surface water continuous sampling device

Abstract

The invention discloses a marine surface water continuous sampling device. The device comprises a cross beam which can be lifted up and down along a ship board, a sampling pipe used for sucking and sampling the surface water and a hydraulic cylinder used for driving the cross beam up and down to enable the sampling pipe to extend to the surface water position are fixed to the cross beam, and a buffer mechanism used for avoiding seawater to generate continuous resistance to damage the sampling pipe in the navigation process of the ship body is arranged on the cross beam. The marine surface water continuous sampling device can ensure that the surface water can be sampled precisely, and can achieve continuous collection in the navigation process of a scientific research ship. The buffer mechanism does not only effectively avoid the sampling pipe to be damaged in the axial direction and the radial direction due to the continuous water flow resistance effect, but also can achieve relievingof the resistance, and thus the service life of the sampling device is prolonged.

Description

technical field [0001] The invention relates to the technical field of scientific research ships, in particular to a continuous sampling device for ocean surface water. Background technique [0002] Microplastics, which are plastic particles with a diameter of less than 5 mm, are a major carrier of pollution. Microplastics include polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyurethane, polyamide, polyethylene terephthalate, etc. Microplastics are small in size, which means higher specific surface area (specific surface area refers to the surface area per unit mass of porous solid matter). The larger the specific surface area, the stronger the ability to adsorb pollutants. First of all, there are already a large number of persistent organic pollutants such as PCBs and bisphenol A in the environment (these organic pollutants are often hydrophobic, which means that they are not easily dissolved in water, so they often cannot follow the water flow freely. f...

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Problems solved by technology

[0006] The box type is generally used in static sampling. In dynamic sampling, the position of the box body cannot be artificially fixed due to the resistance of the water, and it is easy to rub against the hull and cause damage due to impact. The method of trawling is easy to entangle with underwater objects, such as breeding area or some floating objects, it is also impossible to take stable samples for a long time

At present, the continuous sampling method of the scientific research ship during the voyage is generally to install one or more sampling tubes on the side of the ship, extend the sampling tubes into the seawater 20-30cm below the water surface, and use the pumping equipment to pass the sampling tubes to the position. The surface seawater is collected on the ship, but there are some problems with this sampling method. First, the scientific research ship has a certain speed when sailing, and the sampling tube will be subjected to continuous resistance of the seawater when collecting the surface seawater, which will cause the sampling tube to generate upward buoyancy. Not only will it affect the position of the sampling tube underwater, but it is also difficult to fix the sampling tube on the ship's side; second, even if the traditional sampling tube is firmly fixed on the ship's side, the long-term continuous navigation of the scientific research ship will cause continuous resistance in the seawater. The sampling tube will bend the sampling tube and cause damage; thirdly, how to stably fix the sampling tube on the side of the ship is still a problem that needs to be solved

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