Rotary drilling rig and double-channel hydraulic power transmission hoisting swivel elevator thereof

The utility model discloses a rotary drilling rig and a double-channel hydraulic power transmission hoisting swivel elevator of the rotary drilling rig, and discloses the double-channel hydraulic power transmission hoisting swivel elevator. A double-channel rotating joint inner shaft can rotate with a lower connecting body synchronously in the process of hydraulic power transmission, a double-channel rotating joint outer sleeve can roatate with an upper connecting body synchronously in the process of hydraulic power transmission, circumferential rotary steering can be achieved between the double-channel rotating joint inner shaft and the double-channel rotating joint outer sleeve through a bearing, and a double-channel hydraulic power transmission passageway can achieve dynamic seal through a rotating oil seal. Not only can the load transmission under the relative rotating working condition be achieved, but also synchronous transmission of double-channel hydraulic power can be achieved. The utility model furt