Middle and lower layer water sample sampler

Abstract

The invention relates to a middle and lower layer water sample sampler which comprises a raising rope, a hollow sampling cylinder and a cylinder bottom. A circular hole is formed in the cylinder bottom, and the position of the center of the circle of the circular hole is the same as that of the center of the circle of the cylinder bottom; a T-shaped blocking part is arranged at the circular hole of the cylinder bottom and comprises a circular block piece and a cylindrical protruding part fixedly arranged on the lower portion of the circular block piece, the diameter of the cross section of the cylindrical protruding part is smaller than that of the circular hole, the diameter of the circular block piece is larger than that of the circular hole, the diameter of the circular block piece is smaller than that of the cylinder bottom, a long-strip-shaped limiting baffle is arranged on the upper portion of the circular block piece and is parallel to the plane where the circular block piece is located, and the two ends of the limiting baffle are fixed on the inner wall of the hollow sampling cylinder. Compared with the prior art, the middle and lower layer water sample sampler has the advantages of being capable of conveniently and rapidly collecting water samples of the middle and lower layer, simple in structure and accurate and reliable in sampled water samples.

Description

technical field [0001] The invention belongs to the field of water quality sampling instruments, and in particular relates to a water sampler for middle and lower layers, which can be applied to collect water samples for middle and lower layers. Background technique [0002] Emergency response and follow-up environmental monitoring and evaluation after oil spill accidents are necessary measures to grasp the environmental hazards of oil spill. The current environmental monitoring of the impact of oil spill accidents is mainly based on traditional marine environmental monitoring technical means, and the method system designed according to the needs of conventional environmental monitoring has many shortcomings in dealing with oil spill pollution, especially in seawater oil sampling levels. In traditional monitoring, most petroleum samples can only collect surface samples (0.5-1m underwater). However, in actual oil spill accidents, due to the use of oil dispersants, a large am...

AI Technical Summary

Problems solved by technology

However, in actual oil spill accidents, due to the use of oil dispersants, a large amount of oil spilled settled into the middle and lower water bodies, which exceeded the sampling range of conventional petroleum samplers, resulting in a major flaw in the monitoring and evaluation of oil spill impacts.

[0003] The utility model patent with the application number 201520222142.2 discloses a "new deep positioning water sampling device", which includes a hollow cylindrical base, a hollow sampling cylinder, a top cover of the sampling cylinder, a handle and a drawstring, and a cylindrical base. The upper surface of the hollow sampling cylinder is fixed coaxially, and a spring is fixed in the center of the upper surface of the cylindrical base. The spring is connected to the center of the top cover of the sampling cylinder. On the top of the cylinder, a lifting rope is fixed at the center of the top surface of the sampling cylinder, a handle is fixed on the side wall of the base, a lifting rope is fixed on the top of the handle, and a weight is fixed inside the base. The disadvantages of this method mainly include: (1) due to the high water pressure in the middle and lower layers, pulling the rope in the middle and lower water bodies to open the top cover of the sampling cylinder requires a relatively large pulling force, and the operation is relatively laborious; (2) the water samples collected from The top cover of the sampling cylinder enters the water collector, which limits the depth of the water sample to a certain extent; (3) Since the sampling cylinder of the utility model is a hollow structure, the sampling cylinder is sampled during the process of putting the sampling cylinder into the water body. The cylinder is easy to dump, which is not conducive to sampling operation

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