Horizontal vibration type silt settlement testing device

Abstract

The invention provides a horizontal vibration type silt settlement testing device. The device includes a settling cylinder used for holding a water body carrying silt and observing a settling process of silt particles, a power system for providing power required in vibration of the testing device is mounted at the top of an outer side of the settling cylinder, a drive system used for converting rotation motion provided by the power system to horizontal reciprocating linear motion is arranged at the outer side of the settling cylinder in a vertical direction close to a side wall, the settling cylinder is internally provided with a plurality of vertical and parallel vibration grids, the drive system is fixedly connected with the vibration grids, and the vibration grids are driven by the drive system to perform horizontal reciprocating linear motion. The horizontal vibration type silt settlement testing device provided by the invention only generate turbulent fluctuation of the water body and does not generate extra additional inertia force in a settling direction of the particles, the effect of the turbulent fluctuation can be approximately regarded as isotropic, and influence on the settling velocity is isolated, i.e., the device can accurately simulate the law of settling movement of the silt particles in a real water body with turbulent fluctuation.

Description

technical field [0001] The invention relates to the technical field of water conservancy measurement, in particular to a horizontal vibration type sedimentation test device for measuring the sedimentation velocity of sediment particles in a turbulent water body. Background technique [0002] Because the proportion of sediment is greater than that of water, the sediment in the water body will settle down under the action of gravity, and the sedimentation in still water is the simplest example. The sedimentation velocity of sediment particles is the basis for studying sediment problems, such as sediment transport in rivers, sediment deposition in reservoirs or ports, etc., all of which need to accurately calculate the sedimentation velocity of sediment particles. The water flow form in natural conditions and practical engineering applications is almost turbulent flow, and the settlement movement of real sediment particles always occurs in turbulent water bodies. In the resear...

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Problems solved by technology

However, while the vertical vibration produces turbulence in the water body, it also exerts an additional additional inertial force on the sediment particles. When the grid moves downward to generate downward turbulence in the water body, the additional inertial force will increase. The sedimentation velocity of the particles, when the grid vibrates upwards, reduces the sedimentation velocity of the particles, that is, the sedimentation of the particles is affected by the additional inertial force of the vertical vibration, resulting in large errors in the test results

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