Simple rod anchor type shallow-water surficial sediment sampler

Abstract

The invention discloses a simple rod anchor type shallow-water surficial sediment sampler which mainly consists of a supporting frame, a movable cross rod and a sampling box. The supporting frame comprises a rope ring, a supporting rod, a rope hanging hook and an in-box supporting frame. The sampling box is a box body consisting of one bottom plate and four side plates and provided with an open upper surface and a closed lower bottom surface, the upper ends of the left side plate and the right side plate are triangular, and outwards-turned triangular anchor jaw shovel plates are arranged on the front side plate and the rear side plate. The simple rod anchor type shallow-water surficial sediment sampler has the advantages of being easy to machine, simple in operation, stable, reliable and quick and convenient to maintain, is simple in structure and small and exquisite in size, does not need leads and other heavy hammers when being used ordinarily, and the movable cross rod can be folded to facilitate carrying. The simple rod anchor type shallow-water surficial sediment sampler is suitable for investigation and sampling of surficial sediment water areas of freshwater lakes, reservoirs, offshore areas and other shallow-water environments, can be operated on a boat or a skiff without a shipborne winch and a large power facility and other auxiliary equipment and meanwhile can be also used for boat anchor fixing and sampling during field sampling by means of the boat or the skiff.

Description

technical field [0001] The invention belongs to the technical field of sampling tools for water environment sediments, in particular to a simple rod-and-anchor type shallow-water surface sediment sampler. Background technique [0002] Sediment is an important part of waters such as rivers, lakes, reservoirs, and oceans. It plays an important role in the migration and transformation of various pollutants and organisms in water bodies. Sediment monitoring and benthos investigation are important components of water environment monitoring and ecological investigation and an important part of scientific research. The collection of sediment samples is a necessary prerequisite for sediment monitoring, but collecting underwater sediments is a very difficult task. Sediment samples are typically collected using grab collectors and sediment column collectors. The sampler is usually made of stainless steel. In order to collect sediment, it is often necessary to install lead weights on...

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Problems solved by technology

[0017] Another example is the Chinese patent "Simple Surface Sediment Collector" (patent No. 200510029093.1 publication date 2007-02-28), which provides a simple surface sediment collection device suitable for marine ecological environment investigation, which is comparable to traditional samplers. Compared with traditional methods, it has the advantages of convenient operation and high sampling success rate, but it still has the following disadvantages: (1) The structure of the drum is easily affected by the water flow, and it is easy to roll over during the collection process, which disturbs the sediment greatly and it is not easy to collect sufficient samples (2) The 30° plow-shaped flap of the barrel mouth near the lifting ring limits the activity angle of the movable lifting ring. During the collection process, when the rope pulling force is large or the angle is large, it is easy to lift the barrel mouth and fail to collect; (3 ) can only be collected when it is dragged forward horizontally. It is necessary to put a long enough rope and keep a low angle with the bottom surface to be easy to collect; There is no direct driving force to drive the plow-shaped flaps to grab and dig into the bottom mud under the condition of the oblique pull angle. The plow-shaped flaps can only grab and dig very shallow samples and even the mouth of the bucket is lifted; (5) the plow-shaped flaps are short and must In horizontal traction and digging, the grabbing force is weak, and it is only suitable for collecting sediments in deep seabed environments with soft bottoms, not suitable for collecting sufficient sediment samples in environments with hard bottoms

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