Longitudinal flow capacity detecting method of plastic drainage board

Abstract

The invention discloses a longitudinal flow capacity detecting method of a plastic drainage board, relating to a flow capacity detecting method of a drainage board for a hydraulic structure. An upstream water level container, a pressurizing water supply container, a pressure gauge, a downstream water level container, a water pump and a box body are adopted in the longitudinal flow capacity detecting method. The longitudinal flow capacity detecting method is characterized in that the upstream water level container and the downstream water level container have same pipe diameters as that of the pressurizing water supply container; the upstream water level container, the downstream water level container and the pressurizing water supply container are connected in a U-shaped manner to be vertically arranged in the box body; water and the water pump are placed in the box body, a water pump water-conveying pipe is connected to a slow-flow hole of the upstream water level container; connecting disks at two sides of the pressurizing water supply container are provided with pressure-bearing modules with rectangular grooves, the outer sides of the pressure-bearing modules are provided with pressurizing modules with rectangular grooves; two porous flat plates are arranged in the pressurizing water supply container, a sample is clamped between the two porous flat plates, a pressurizing hole of the pressurizing water supply container is connected with the pressure gauge and a pressurizing air pump; and a straight pipe of the upstream water level container is provided with a slow flow hole and an overflow hole, a straight pipe of the downstream water level container is provided with a drainage hole, and a measuring cylinder is arranged below the drainage hole.

Description

technical field [0001] The invention relates to a method for detecting water flow of a drainage plate used for a hydraulic structure. Background technique [0002] Usually, the longitudinal water flow test of the plastic drainage board directly uses the tap water of the pipeline for test detection. When the temperature of the tap water is quite different from the room temperature, the long-term test will lead to unstable water temperature and affect the test results. The test should be carried out after 1 hour or half an hour of seepage under stable lateral pressure and hydraulic gradient, and the test should be performed once every hour or every 2 hours until the difference between the two water flows before and after is less than 5% of the previous water flow.” , if adopt tap water to carry out experiment directly, will waste water resources greatly. Longitudinal water flow is an important parameter for the quality inspection of plastic drainage boards. Common plastic dra...

AI Technical Summary

Problems solved by technology

[0002] Usually, the longitudinal water flow test of the plastic drainage board directly uses the tap water of the pipeline for test detection. When the temperature of the tap water is quite different from the room temperature, the long-term test will lead to unstable water temperature and affect the test results. The test should be carried out after 1 hour or half an hour of seepage under stable lateral pressure and hydraulic gradient, and the test should be performed once every hour or every 2 hours until the difference between the two water flows before and after is less than 5% of the previous water flow.” , if tap water is used to test directly, it will greatly waste water resources

Longitudinal water flow is an important parameter for the quality inspection of plastic drainage boards. Common plastic drainage board water flow tests are prone to head loss due to the slender connecting pipes, resulting in inaccurate test results. When the water flow of the drainage board reaches the pipeline water flow , the test result is only the water flow of the pipeline, and the real water flow of the drainage board cannot be measured

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