Stepping type crawling mechanism for pile leg and planetary cruise type pile leg cleaning and overhauling device

The invention discloses a stepping type crawling mechanism for a pile leg and a planetary cruise type pile leg cleaning and overhauling device. The stepping type crawling mechanism for the pile leg comprises an adsorption system, and the adsorption system comprises a first hydraulic clamping module and a second hydraulic clamping module which are provided with hydraulic supporting columns correspondingly; a lead screw transmission module is connected between the first hydraulic clamping module and the second hydraulic clamping module. The first hydraulic clamping module and the second hydraulic clamping module establish an axial two-stage adsorption relationship with pin holes in the surface of the pile leg through hydraulic props respectively; on the premise that the first-stage adsorption relation is kept and the other-stage adsorption relation is relieved, the lead screw transmission module is driven, and stepping type crawling is completed; the device has the advantages of being high in load capacity and