The invention discloses an undercarriage control actuating cylinder
hydraulic control valve. The undercarriage control actuating cylinder
hydraulic control valve comprises a valve body, a first
pipe nozzle, a fourth
pipe nozzle, a second
pipe nozzle and a third pipe nozzle are formed in the valve body, the first pipe nozzle and the fourth pipe nozzle communicate with an actuating cylinder rodless cavity and an actuating cylinder rod cavity, the second pipe nozzle and the third pipe nozzle communicate with a hydraulic
system, a buffer
piston and a floating
piston are arranged in a left cavity in a spaced manner, a
thermal safety valve is arranged between the buffer
piston and the floating piston, a second oil path is arranged on the buffer piston, a cavity between the buffer piston and the floating piston and the second oil path communicate and are throttled through the
thermal safety valve, and an oil compensation channel communicating with the second pipe nozzle is arranged in the valve body; a liquid control valve and a seal base are arranged in a right cavity in a spaced manner. The
hydraulic control valve enables hydraulic lock, oil differential compensation, oil path pulsation, and
thermal safety protection functions to be integrated in one component, opening and closing of a hydraulic lock, conversion of the oil compensation function and opening of the oil path pulsation, and thermal safety protection can be automatically coordinated, and finally, through control over the actuating cylinder, undercarriage bearing, rapid putting down, oil path pulsation, and heat safety protection functions are achieved.