The invention provides a single-acting pneumatic
hydraulic intensifier. The single-acting pneumatic
hydraulic intensifier comprises an oil cylinder, a pressure cylinder and a pneumatic
hydraulic cylinder, all of which are connected in sequence; the oil cylinder is provided with an upper cover, a lower cover and a
piston; a pre-pressure cavity is formed between the
piston and the upper cover, while an
oil storage cavity is formed between the
piston and the lower cover; the pressure cylinder is provided with an upper pressurization cover, a lower pressurization cover and a middle pressurization cover; a pressurization piston is arranged between the upper pressurization cover and the middle pressurization cover; a pressurization cavity is formed between the pressurization piston and the upper pressurization cover, while a return cavity is formed between the pressurization piston and the middle pressurization cover; a pressurization oil cavity is formed between the lower pressurization cover; a pressurization rod connected to the pressurization piston extends into the pressurization oil cavity; the pneumatic
hydraulic cylinder interior is divided by a working piston into an oil cavity and a gas cavity; the pressurization oil cavity is connected with the
oil storage cavity and the oil cavity, respectively. By means of such a solution, fast movement and pressurization are realized by using the pneumatic technology, and
high pressure output is realized by means of
hydraulic control, and therefore, the
gas consumption is low, and so is the
energy consumption; the single-acting pneumatic
hydraulic intensifier is compact in structure, high in reliability and low in cost, and realizes complete gas-liquid isolation; besides, the working push rod is fast, steady and controllable in motion.