日本无遮挡真人祼交视频_国产精品久久久久久成人影院_亚洲AV成人精品一区二区三区_久久久久久精品免费免费WE

Working principle of hydraulic power pliers

The working principle of the hydraulic power tongs is to transfer the power of the workover rig to the hydraulic motor of the hydraulic power tongs via a stroke reducer, and then reduce the speed by two or one stage, so that the open gear of the tong head rotates to generate two high and low speeds, thereby driving Pipe (drill) rotates. When the open gear rotates, the plate frame does not rotate first under the braking action of the brake hammer, so that there is a relative movement between the open gear and the stern plate frame. In this way, the two rollers of the stern plate will climb the slope and force the jaws on the stern plate to move toward the center of the pipe (drill) until they bite the pipe (drill) and then engage Drive the pipe (drilling tool) together.