Constant pressure precision water control device for drip irrigation

The utility model relates to the technical field of irrigation equipment in agricultural water and soil engineering, in particular to a constant pressure precision water control device for drip irrigation. The constant pressure precision water control device for drip irrigation comprises a support and is characterized in that an electronic scale is arranged on the support, a water storage bottle is arranged on the electronic scale, the water storage bottle is divided into two parts up and down by a water-stop sheet, a first piston is arranged in the upper part of the water storage bottle, an upper water inlet pipe is arranged below the first piston, a second piston and a lower water inlet pipe are arranged in the lower part of the water storage bottle, and the first piston and the second piston are connected through a connecting rod; the lower part of the water storage bottle is provided with an air hole and a water outlet pipe, a switch is arranged on the water outlet pipe, and a bottle cover is arranged on the upper portion of the water storage bottle. The constant pressure precision water control device can provide constant pressure water supply waterheads, and the irrigation quality and irrigation uniformity of drip irrigation under a plastic film are improved. The arranged electronic scale can precisely control the water amount, and the waste of water resources can be reduced; the water supply amount and the water supply waterheads can be precisely controlled, and a performed experiment is reasonable, precise and scientific.