The application discloses a core
pipe self-adapting guiding and telescopic
hydraulic cylinder with self-compensation function, which comprises a cylinder body
assembly, a
piston assembly, an ear ring
assembly and a core
pipe assembly. The ear ring assembly comprises an ear ring body and a hydraulic valve, the ear ring body is provided with an oil inlet and outlet hole and a first oil
inlet channel, and the oil inlet and outlet hole is communicated with the first oil
inlet channel through the hydraulic valve; the core
pipe assembly comprises a floating core pipe, a first core pipe, a second core pipe and a guiding device, the floating core pipe, the first core pipe and the second core pipe are sequentially nested, and the guiding device is installed at the front end of the floating core pipe. Through the setting of the oil pipe seat, the second guiding sleeve and the guiding device, the floating core pipe can be effectively protected, limited and supported and guided, so that the floating core pipe is prevented from being damaged due to flexural deformation of the end face caused by
back pressure during high-speed reciprocating operation of the
hydraulic cylinder, and the safety of the floating core pipe is protected; through the setting of the hydraulic valve, the flow and pressure of the oil in the
hydraulic cylinder can be regulated and controlled, so that the telescopic speed of the hydraulic cylinder is adjusted.