Combined type venturi tube fertilising valve

The utility model provides a combined type venturi fertilization valve. A water flow control valve and a venturi control valve are connected in parallel, the fertilization uniformity is controlled by the synergic adjustment of water stream and liquid fertilizer, the utility model is especially suitable for the quantitative control of micro irrigation fertilization and spray irrigation fertilization. The structure of the combined type venturi fertilization valve comprises a water inlet pipe and a water outlet pipe mounted on an irrigation pipeline and the water flow control valve installed between the water inlet pipe and the water outlet pipe. A venturi tube is connected on branch pipes provided on two sides of the water flow control valve, and the elevator pipe part of the venturi tube is provided with a liquid fertilizer control valve which is connected with a liquid fertilizer storage tank. The utility model can effectively assure the balanced output and the quantitative control of the liquid fertilizer, having larger actual meaning of realizing accurate agricultural metering control. Synchronously for additional power is of no need, the fertilization valve of the utility model is of lower manufacturing and using cost, which is good for popularity and application in country.