DHP ring chain electric gourd elevator is a kind of slow electric gourd. It is 10 tons of specifications, an increase of 0.09 meters in one minute. Slow speed is also advantageous. It is suitable for multiple units to improve heavy objects together. Slow speed and synchronization performance, it is not easy to have serious loading phenomena. This gourd is used in the improvement of building climbing racks, when welding of large oil storage tanks, increase oil tanks, and improve steel frames when the plant is elevated. By connecting the control cabinet, the control cabinet is uniformly controlled by the rising and decreased of the electric gourd.