Method for adjusting electrical control parameters of proportioning valves of double-cylinder hydraulic gate hoist

The invention discloses a method for adjusting electrical control parameters of proportioning valves of a double-cylinder hydraulic gate hoist. Voltage adjusting valves of the proportioning valves of a left oil cylinder and a right oil cylinder are controlled by a PLC (programmable logic controller) of the double-cylinder hydraulic gate hoist to further realize control and acquisition of strokes of piston rods of the left and right oil cylinders. When a stroke difference delta H of the piston rods of the left and right oil cylinders is larger than an allowable deviation threshold delta H1 the strokes of the two cylinders, the proportioning valve in any one of the oil cylinders is adjusted, and voltage values are changed according to change conditions of the acquired stroke difference delta H of the piston rods of the left and right oil cylinders in each deviation change rate examination period until the stroke difference delta H of the piston rods of the left and right oil cylinders is smaller than or equal to the allowable deviation threshold delta H1 the strokes of the two cylinders. The method for adjusting the electrical control parameters of the proportioning valves of the double-cylinder hydraulic gate hoist has the advantages that effectiveness in deviation correction is achieved, a deviation correction function equation is easy to implement by means of PLC (programmable logic controller) programming, and accordingly reliability in operation of a gate is guaranteed.