Deep water stratified sampling device

Abstract

The invention relates to a deep water stratified sampling device, and aims to effectively solve the problems that water stratified sampling needs to be operated for many times, and water samples are easily mixed. The deep water stratified sampling device comprises an outer casing and an inner casing, wherein the inner casing can slide up and down in the outer casing; the inside of the inner casingis divided into several water storage chambers in circumferential distribution; a water inlet hole is formed in the top of each water storage chamber; a plurality of plungers in one-to-one correspondence to the water inlet holes are fixed on the top end of the outer casing; an annular groove is formed in each plunger; the annular grooves in the plurality of plungers are distributed in an arithmetic progression way; an elastic block capable of being inwards popped out is arranged on the right side wall of the outer casing; a plurality of vertical slide grooves in end-to-end connection are formed in the outer wall of the inner casing; the length of each slide groove is equal to the height tolerance of the annular groove; and the depths of the plurality of slide grooves are gradually reducedfrom top to bottom according to the arithmetic progression. The deep water stratified sampling device has the advantages that the sampling operation times are greatly reduced; the electromagnetic valve control is not needed; after the sampling, the sealing can be timely performed; the problem of mixing of water samples with different layer depths is solved.

Description

technical field [0001] The invention relates to the field of water quality monitoring, in particular to a deep water layered sampling device. Background technique [0002] Water quality sampling is an important part of water quality monitoring, and it is required to accurately extract water samples at specific time and spatial locations; when sampling deep water, it is often necessary to sample multiple depths according to the depth gradient. Currently, when performing stratified sampling, Generally, a water intake container is lowered to a designated depth, and the water intake container is provided with a cover plate that can be opened and closed in one direction, which is opened during the lowering process and closed during the lifting process, so as to realize the sampling work. There are many disadvantages in this method: First, every Only one depth sample can be taken at a time, and the container needs to be lowered multiple times for sampling when layered sampling; se...

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a deep-water layered sampling device, which effectively solves the problem that the current layered sampling of water bodies requires multiple operations and the water samples are easily mixed

[0005] The invention greatly reduces the number of sampling operations, does not need electromagnetic valve control, can seal in time after sampling, and solves the problem of mixing water samples of different depths

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