Automatic hydraulic valve rod assembly device of butterfly valve assembly machine and assembly method thereof

Provided are an automatic electrohydraulic control butterfly valve assembly machine and an assembly method thereof. Use is convenient, assembly procedures are less, operation is fast, and the host machine pressure can be regulated in time according to butterfly valves with different types and specifications; the working efficiency and quality are greatly improved, and the economic benefit is good; because a PLC is adopted to perform automatic control, the man-machine security coefficients are high, the assembly is accurate, a large amount of time and a large number of energy resources are saved, the maintenance cost and the production cost which are caused by wear are reduced, the engine performance is obviously improved, the service life is obviously prolonged, and popularization is convenient. The automatic electrohydraulic control butterfly valve assembly machine is composed of a butterfly assembly workbench, an infrared induction security device, a tooling base, an assembly machine stand column, a pressure head tool, a pressure regulation valve device, an upper oil cylinder support frame, a pressure gauge device, an upper hydraulic cylinder device, a PLC control box device, control buttons, an electrical box device, a butterfly valve tool, a locking nut mechanism and a pressing lead screw assembly.