Control valve for achieving quick pressure relief and same branch pressure in pesticide liquid spraying

Abstract

The invention provides a control valve for achieving quick pressure relief and same branch pressure in pesticide liquid spraying, and belongs to the field of agricultural machinery. A valve body is provided with a liquid inlet cavity, a liquid spraying cavity, a pressure releasing cavity and a pressure regulating cavity, and a box body and a spray head are installed at the upper end and the lower end of the valve body respectively; an installation plate, an upper limit switch and a lower limit switch are fixedly installed in the box body, and a motor fixedly provided with a drive gear, a duplex middle gear and a threaded shaft fixedly provided with a driving gear are assembled on the installation plate; a main shaft in inserted into the valve body, a limit rod, an upper clamp spring, an upper cone valve, an upper pressure spring, a middle cone valve, a middle clamp spring, a lower clamp spring and a lower cone valve are sequentially installed on the main shaft from top to bottom, a lower pressure spring is assembled on the lower side portion of the lower cone valve, the threaded shaft is in threaded connection with the main shaft, and a pressure regulating valve rod fixedly provided with a regulating rotary knob is assembled on the valve body and located in the pressure regulating cavity. The control valve is novel in structure and reliable in use, control operation is easy and convenient, the phenomena of leakage and dropping faults of the spray head can be effectively avoided and eliminated when pesticide liquid spraying operation is stopped, no pesticide liquid loss exists, the production cost is low, and the operation quality is good.

Description

technical field [0001] The invention belongs to agricultural machinery, and mainly relates to a rapid pressure relief and branch pressure control valve on a liquid medicine spraying machine tool. Background technique [0002] In order to avoid damage to agricultural crops, ensure the quality of agricultural products, reduce the loss of liquid medicine, and reduce operating costs, there are strict technical requirements for spraying liquid medicine on crops. At present, the leakage and after-dripping phenomenon of the nozzle liquid after the spraying of the liquid is stopped is one of the main problems affecting the quality of the spraying liquid. Since the existing liquid medicine spraying device is not equipped with a liquid medicine decompression or pressure relief mechanism, when the liquid medicine pressure does not drop in the liquid medicine system, it can only rely on the seal between the valve core and the valve seat of the liquid medicine spray head. Cooperate with...

AI Technical Summary

Problems solved by technology

At present, the leakage and after-dripping phenomenon of the sprinkler liquid after the spraying is stopped is one of the main problems affecting the quality of the spraying liquid

Since the existing liquid medicine spraying device is not equipped with a liquid medicine decompression or pressure relief mechanism, when the liquid medicine pressure does not drop in the liquid medicine system, it can only rely on the seal between the valve core and the valve seat of the liquid medicine spray head. Cooperate with the realization of stopping the spraying of the liquid medicine, the leakage and after-dripping of the liquid medicine are more prominent, which affects the quality of the liquid medicine spraying operation

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