Water body bottom mud sampler

Abstract

The invention discloses a water body bottom mud sampler. A sealing head is arranged at the upper end of a sampler bracket; a sampling pipe which is placed vertically is arranged at the lower end of the sealing head; a one-way valve is arranged at the upper end of the sealing head; the one-way valve is communicated with the sampling pipe; a control switch is arranged at the position, corresponding to the lower part of the sampling pipe, of the sample bracket; the control switch is provided with a bottom plug; an elastic rope bracket is arranged on the sampler bracket which is above the control switch; the elastic rope bracket extends downwards to the lower end of the sampling pipe; positioning holes which are located at the two sides of the sampling pipe are formed in the terminal end of the elastic rope bracket, respectively; elastic ropes which are located at the two sides of the sampling pipe are arranged on the elastic rope bracket respectively; the other end of each elastic rope penetrates the corresponding positioning hole to be fixed on the bottom plug; the lower end of the sampler bracket projects out from the terminal end of the sampling pipe for a section of distance. According to the water body bottom mud sampler, mud column in the sampling pipe is protected against falling, the sampling pipe is guaranteed to be above the water level, and the mud column still can persist in the sampling pipe completely at the presence of pressure unbalance.

Description

technical field [0001] The invention relates to a water body sediment sampler. Background technique [0002] The bottom mud of rivers or lakes is composed of clay, silt, organic matter or various minerals. After a long period of physical, chemical, biological action and water body transportation, it is the mud that is deposited on the bottom of the water body. It is the main source of water body pollutants. Reservoirs and secondary release sources can reflect the current pollution status and history of water pollution. In order to study the accumulation, distribution, transformation, and migration of water pollutants in the sediment and their impact on the water environment, sediment samples at different depths were collected. Analytical research has important scientific value and practical significance for water environment monitoring. [0003] Sediment sampler is an important tool for water environment monitoring. At present, the main sediment samplers at home and abroad ...

AI Technical Summary

Problems solved by technology

Gravity columnar sampler is suitable for water depth within 5m. The sampling tube is generally 1m long. The main components include cutting head, plexiglass sampling tube, extension rod, hitting handle, lifting device, etc. This kind of sampler is simple, light and easy to use. However, there are still disadvantages such as easy to cause interference fluctuations during sampling, and poor adaptability to the environment.

Piston sampler is composed of T-shaped handle, sampler, sampling tube, cutting head, piston, expansion connecting rod and other connections. Although the sampler is simple and fast in sampling and can maintain the original properties of sediment, it is inconvenient to carry and use , Sampling depth has great limitations and other shortcomings

The grab sampler is simple in structure and easy to operate, but it has the disadvantages of serious interference to the natural layer of the sediment during the sampling process, poor sealing, and easy loss of samples.

[0004] Generally, the sediment sampler needs an external power source to complete the corresponding operation, but when collecting samples in the field, it is often difficult to find a power source, and the sediment sampler cannot be used

However, if an external power supply is configured, a heavy battery needs to be carried, which increases the burden on the collection personnel, and the mud sampler in the prior art has disadvantages such as complex structure, numerous components, high cost, easy damage, and high maintenance cost.

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