Device for adding sand to suspended load in river model test

Abstract

The invention relates to a device for adding sand to suspended load in a river model test, and belongs to the field of hydraulic tests. The device mainly comprises a sand supply power system, a sand release device, a sand supply pipe and a return pipe, and is characterized by also comprising an integrated automatic control system, wherein the inlet and outlet of the sand supply power system is connected with the sand release device through the sand supply pipe and the return pipe to form a suspended load slurry conveying loop; and the integrated automatic control system is connected with the sand supply power system and the sand release device through a control line to monitor and adjust the suspended load slurry conveying process of the sand supply power system and the sand release device. By the device, the sand supply system is not blocked, backflow of a bypass pipe and the return pipe stirs a slurry tank, and a sand adding hole is not clogged under any experiment conditions; and the device can accurately meter the sand adding flow, and can fully automatically control to add the sand.

Description

technical field [0001] The invention belongs to the field of water conservancy experiments, in particular to a suspended mass sanding device for river engineering model tests. Background technique [0002] The sediment particles suspended in the water body and moving downstream with the water flow are called suspended sediment. In natural rivers, the suspended sediment content accounts for more than 80% of the total sediment volume. As an important means of river research, river engineering model test is very important to simulate the movement of suspended sediment. In order to accurately simulate the movement process of suspended sediment in the river engineering model test, it is necessary to establish a water-sediment separation system, that is, to release the water flow process at the inlet of the river engineering model, and to add suspended sediment through the suspended sediment adding device. When adding sand, firstly, according to the design of the river engineeri...

AI Technical Summary

Problems solved by technology

During the test, generally the flow rate of the main pipe is very large, and the flow rate of the branch pipe is relatively small (the corresponding flow rate is also very small). In some test periods, sand is not even needed, so the sand discharge branch pipe is very easy to block and affect the test, or in the electromagnetic There is a certain amount of mortar silting in the flow meter 5-4, which affects the flow detection and brings inconvenience to the actual operation

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