Laminated vibration columnar bottom sampler

Abstract

The invention discloses a laminated vibration columnar bottom sampler and belongs to the technical fields of environment monitoring, environment control and sediment sample collection. The sampler comprises a vibration mechanism, a drainage head, a self-balance seal device, a sampling tube, a self-seal sampling head, a stabilizing support, a wire, a scaled rope, a vibrator rope and a stabilizing support rope. The vibration mechanism drives the sampling tube to vibrate, the sediment surrounding the sampling head and sample tube are liquefied, the sampler sinks evenly, and the deep laminated sediment collection is implemented. The vertical sampling is guaranteed through the stabilizing support, the self-balance seal device and the sampling head are used for sealing up and down, sampling loss is reduced, and the sampling tube can be prolonged according to the requirements; the bottom sampler has the advantages that inland water laminated sediment sample collection is implemented, the sample representativeness and fidelity are improved, the sample representativeness is high, equipment is light, operation is simple and cost is low.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, environmental treatment and sediment sample collection, and relates to the collection of inland sediment samples such as reservoirs, lakes and rivers, and in particular to the collection of deep bedding sediment samples in inland waters. Background technique [0002] The collection of sediment samples is the basis for studying the accumulation process of water pollution and the level of pollution risk. The surface layer of sediment in inland waters is mainly weak water-saturated silt, which is difficult to support sampling equipment, while the lower layer gradually becomes denser with gravity deposition, and it is difficult to collect deep samples; The depth of sediment indicates the pollution characteristics, hydrological events, development mode, etc. of the region in different years. Therefore, the collection of stratified deposition samples is a key technical issue. With th...

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Problems solved by technology

Obviously, tools such as shovels have limited usage conditions, and are only suitable for exposed sediments in dry years, and cannot obtain underwater sediments; generally, grab dredgers can only collect sediments of more than ten centimeters on the surface, and are suitable for Due to the comprehensive investigation and study of sediments, it is impossible to obtain deeper sediments; the columnar dredger is the main equipment for layered sediment collection in inland waters, and the commonly used columnar dredger relies on the gravity of the dredger itself. For sediments, this collection method has the following shortcomings: first, the sediment samples are greatly disturbed in the process of dropping the mud sampler, especially destroying the original physical structure of the surface sediments; second, the collection depth Relying on its own weight, the depth of sample collection is limited by the weight of the equipment, and deep samples cannot be collected, resulting in insufficient utilization of the space in the sampling tube. Moreover, if the sampler is too heavy, it will not only make the operation more difficult, but also require the sampling environment and conditions. Higher (requires a large ship), which also affects the universality of product application; third, the sampler may be tilted due to the high center of gravity and the flow velocity of the water area, resulting in the samples in the sampler not necessarily representing the actual deposition distribution

In the later research, HYDRO-BIOS company developed a columnar dredger with a stable support, which improved the influence of inclination, but the defect that its sampling depth depends on the weight of the collector itself still exists; Denmark KC-Denmark company The developed HAPS vibrating columnar sediment sampler has been well applied in the layered collection of marine sediments, but the equipment is heavy and expensive, and needs to be equipped with a special winch for operation, which is often not available for ships used in inland waters collection. such working conditions

In addition, marine sediments are washed by tides, and the bottom sediments are relatively dense, which can withstand the weight of the collector, while the sediments in inland waters are relatively loose, and do not have the sampling conditions required by the equipment

[0003] Obviously, none of the aforementioned equipment has the function of collecting stratified sediment samples in inland waters, especially the deep layered sediment sample collection in inland waters

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