AUTO ELECTRIC CONTROL SYSTEM FOR FLOODGATE USING FLOAT AND PHOTODIODE

摘要

PURPOSE: An automatic electrical control device for a water gate using a floating device and photodiodes is provided to open and close the water gate automatically when the highest water level or the lowest water level is reached. CONSTITUTION: An automatic electrical control device for a water gate using a floating device and photodiodes comprises a floating device(10), a light emitting sensor(20), a pair of light receiving sensors(30,30a), a pair of photodiodes(40,40a), a direction changing check valve(50), and a power unit assembly(60). The floating device informs a water gate of the opening and closing time by sensing water level change. The light emitting sensor emits a light signal horizontally. The light signal of the light emitting sensor is inputted to the light receiving sensors. The photodiodes operate a hydraulic motor(63) automatically by changing the light signal of the light emitting sensor to an electrical signal, and applying the electrical signal to a control panel(3). The direction changing check valve blocks a fluid line(51) connected to a hydraulic pump(61) when the water gate is closed, and the fluid is collected to a hydraulic tank(62). The direction changing check valve blocks the fluid flowing backward to the hydraulic tank by blocking the fluid line when the water gate is opened, and the fluid is supplied to a water gate cylinder(2). The power unit assembly discharges hydraulic pressure of the hydraulic tank to a reciprocating fluid line by pumping the hydraulic pressure.