Manual rotation type column shaped deposit sampling instrument

Abstract

The invention discloses a manual rotating cylindrical sediment sampler which includes a force applying part consisting of a T-shaped handle and a connection rod as well as a knife cylinder part consisting of the upper cover of the knife cylinder and the knife cylinder (comprising a cylindrical screw auger). The T-shaped handle, the connection rod and the upper cover of the knife cylinder all adopt the connection modes of a reversed U-shaped through slot and a cylindrical cross connector. The sampling personnel holds the T-shaped handle and vertically inserts the sampler into the underwater sediment. During the process of inserting down, the water in the cylinder is drained out from the drain hole of the side surface at the upper end of the knife cylinder as well as the water through hole of the center of the upper cover of the knife cylinder; after reaching a certain depth, the T-shaped handle is clockwise pressed down in a rotating way, the cylindrical screw auger at the lower end of the knife cylinder with the deep angle of 45 degrees rotates downwards; the collected depth of the sediment is confirmed according to the scale on the connection rod to finish the motion of sampling. The device can easily collect the cylindrical sediment with the needed depth under the operation of manual rotating; besides, the device has a simple structure, saves force, can maintain the sample to have non disturbances and fidelity sequences.

Description

technical field [0001] The invention relates to a water body sediment sampler, in particular to a manual rotary columnar sediment sampler. Background technique [0002] Sediment sampler is a scientific research instrument widely used in environmental, ecological and biological research. Most of the currently designed sediment samplers can basically maintain the sediment sequence when collecting loose sediment or surface sediment. There is no boundary disturbance, but the lower ends of all sampling tubes are circular, zigzag or inclined, and the force is generally applied by a counterweight or a handle, so it is difficult to collect hard bottom sediments or bottom columnar sediments larger than 30 cm. And the sampling volume is limited. CN1414361A discloses a mechanical hand-held sediment sampler suitable for seabed without boundary disturbance. The device adopts the knife edge of the lower end side of the knife cylinder and the lower end side of the insertion tube and the e...

AI Technical Summary

Problems solved by technology

This knife-edge design disperses the pressure applied to the sediment, and after reaching a certain depth, the knife-edge will be difficult to go deep, resulting in limited collection depth

The disclosed portable deep-water bottom mud sampling device of CN2769880Y has adopted the mode that the counterweight sinks naturally to go deep into sediment sampling, and it is difficult to collect the required deep sediment. Generally, it is connected by a horizontal handle socket or a screw thread, which respectively have the defects of limited handle diameter and easy loosening when rotating, which makes it difficult to operate when pressing down.

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