Sand substance wriggling and moving collector

Abstract

The invention discloses a sand substance wriggling and moving collector used for measuring the number of wriggling and moving sand grains in the sand flow. The sand substance wriggling and moving collector is in a cylindrical shape, the circle center of the surface of a top cover is provided with a sand inlet hole, a dense screen is arranged above the sand inlet hole and welded to the top cover through a brazing wire, the surface of the top cover is covered with a sand substance layer, a sand collecting funnel is arranged on the lower portion inside the top cover, the sand collecting funnel is communicated with the sand inlet hole, the center of the cylinder is provided with a sand collecting barrel, the center of the sand collecting barrel is provided with a sand collecting bottle, the sand collecting bottle is communicated with the sand collecting funnel, and small sand leakage holes are formed in the sand collecting bottle at equal intervals. The top cover of the collector is coated with glue substances, the sand substances in the study area are evenly scattered to the top cover coated with the glue substances, the roughness of the top cover is consistent with the grain size of the sand substances on the surface of drift sand in the study area, the original friction coefficient of the ground and the sand substances is kept, and the accuracy of measuring the wriggling and moving amount under different wind powers can be guaranteed. The sand substance wriggling and moving collector is simple in structure, easy to install, and capable of carrying out sampling easily and being widely applied to studying and monitoring the blown sand physics, the forestry and various sand prevention and desertification control projects.

Description

technical field [0001] The invention relates to an instrument for measuring wind-sand flow, in particular to an instrument for measuring the amount of creeping sand grains in wind-sand flow. Background technique [0002] Wind-sand flow is the gas-solid two-phase flow of wind-blown sand under the action of wind force. Under the action of wind force, sand materials with different particle sizes move in three ways, which are creep, jump and suspension. Generally speaking, when the near-surface wind speed reaches the sand-emission wind speed of the sand material, the sand material begins to leave its original position, forming a wind-sand flow. The content of sand matter in wind-sand flow is related to height, which has been proved by many scholars. According to Zhu Zhenda's (1962) experimental research, 90% of the sand volume is transported within a height of 0-10cm. Field observations by Wu Zheng and Qi Zhiyao also show that most (90%) of the sand carried by the airflow is ...

AI Technical Summary

Problems solved by technology

However, there is a problem in the existing instruments for measuring the amount of creeping sand at home and abroad, that is, no matter what material is used to make the surface of the creeping collector, the friction coefficient between the sand entering the surface of the creeping observer and the observation surface is not considered. The problem is that the movement speed of the sand particles on the surface of the creep observer and before entering the collection device is inconsistent with the movement speed of the original surface, whether it is fast or slow, and the measured creep amount per unit area per unit time is either large or large. Small

At the same time, no matter how small the creeping sand hole is, there will always be some jumping matter that may fall into the small hole, resulting in a larger measurement result

Images