The invention provides a withholding scour prevention quantitative
water intake for a farmland low-pressure
water delivery pipeline, and belongs to the technical field of farmland pipeline
water delivery irrigation engineering. The withholding scour prevention quantitative
water intake comprises the low-pressure
water delivery pipeline, and is characterized by further comprising a water inlet area, a water outlet area and a withholding
control area, wherein the withholding
control area is arranged in the water outlet area, the water inlet area is respectively connected with the low-pressure water delivery pipeline and the withholding
control area, the water inlet area is formed by connecting vertical pipes and a
reducer tee, the
reducer tee is installed on branches of the low-pressure water delivery pipeline, an outer cover, locating pins, connecting pipes and water outlets arranged in side walls of the outer cover are arranged in the withholding control area, the locating pins are arranged on
pipe walls of the outer cover and stretch out of inner walls of the pipes, the connecting pipes are connected to the vertical pipes in a sleeved mode, outer walls of the connecting pipes are provided with sliding chutes, the outer cover is arranged on the connecting pipes in a sleeved mode, the locating pins are placed in the sliding chutes, and the outer cover moves along the sliding chutes up and down through the locating pins. The withholding scour prevention quantitative
water intake is reasonable in structure, stable in
water flow, less in local head loss, simple in structure, low in manufacturing cost, flexible in operating, capable of blocking water through sealing gaskets, good in sealing performance and easy to maintain.