Detachable heat preservation oil pipe connecting device

The invention relates to the technical field of oil pipe connection, and provides a detachable heat preservation oil pipe connecting device which comprises an oil pipe, a fixing ring is fixedly connected to the outer wall of the oil pipe, a locking mechanism is arranged on the outer wall of the fixing ring, a protection mechanism is arranged on the outer wall of the oil pipe, and a first sealing groove is formed in the oil pipe. A second sealing sleeve is slidably connected to the outer wall of the oil pipe, a second sealing groove is formed in the second sealing sleeve, and a second sealing ring is arranged in the second sealing groove. A second fixing frame and a third fixing frame are pushed to move, a fixing ring is clamped in a limiting groove, a second connecting block slides on the outer wall of a third connecting block through movement of the second fixing frame and the third fixing frame, and a threaded rod is pushed to move and be inserted into the second connecting block and the third connecting bl