Non-shipborne portable throwing type accurate sample collection device and work method thereof

Abstract

The invention relates to the technical field of environment improvement, in particular to a non-shipborne portable throwing type accurate sample collection device which can collect sediment samples orwater samples. The device comprises a high-stability pneumatic accurate throwing device, a sampling device recycling device and a water body sample synchronous collecting device, and the device further comprises a sediment automatic grabbing device when collecting the sediment samples, and further comprises a water body sample synchronous collecting device when collecting the water samples. The device belongs to the non-shipborne portable throwing type accurate sediment or water body sample collection device which can be applied to various specific water areas and can realize accurate point distribution, and the device is convenient to operate and accurate in positioning, is mainly applied to collection of sediment or bottom mud and water body samples in various water areas, and is particularly suitable for collecting the samples in shallow water areas such as rivers, lakes, offshore areas and shoals and areas where workers cannot reach due to deep sludge in the water areas or other risks.

Description

technical field [0001] This application relates to the technical field of environmental remediation, in particular to a non-shipborne portable throwing-type sample precision collection equipment and its working method. Background technique [0002] In recent years, with the implementation of the national "Water Ten Measures" and the gradual advancement of the improvement of the ecological environment of large rivers and coastal waters, the pollution control of sediments has attracted widespread attention. As the "source" and "sink" of various pollutants in the water body, sediment or sediment can exchange substances with the overlying water through various channels, and play an important role in the evolution of water environment quality and the habitat security of benthic organisms. In particular, surface sediments (0-20 cm) are subject to multiple stresses such as pollution accumulation, hydraulic disturbance, lack of dissolved oxygen, and reduction in redox potential, mak...

AI Technical Summary

Problems solved by technology

Because the grab sampler generally needs to be put into the water vertically, otherwise it will easily cause the sampler to decouple and close in advance, resulting in sampling failure, so it cannot be thrown to a remote area for sampling

For the sediment collection in this area, some people directly use shovels to dig on the slopes of the water area. However, due to the edge effect of the water area, coastal erosion, and slope hardening, the samples collected by this method are often not representative, and may even make Research results are distorted

There are also people who use traditional grabs to collect sediment samples with the help of bridges. However, due to the fact that the bridge foundation has been hardened under the bridge, and the water flow under the bridge is often fast, it is difficult to retain the silted sediment, and the collected sediments cannot objectively reflect the sediment quality

Although researchers have made various attempts or optimizations to the sediment collection device, there are still many defects, and none of them can realize land-based manual operation (manual operation on shore)

At present, for shallower waters with a water depth of about 2 meters (including rivers, lakes, coastal seas, and shoals, etc.), and areas where staff cannot reach because of deep silt or other risks, sediment research cannot be carried out. , the environmental evolution process of the sediments in this area has become a "black box" of research in the same field

In addition, for some deep-water areas, due to the high cost of requisitioning ships to collect sediments, the sampling frequency is also restricted to a large extent, which affects the reliability of the research results.

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