The 10 -ton DHP ring chain electric hexer is also called oil tank electric gourd. Because it is applicable to the tank in the welding of oil tanks. Its tonnage specifications are 5 tons, 10 tons, 15 tons, 20 tons, and 30 tons. The 10 -ton specifications are used in the lifting oil tank. When the weight of the weight tank is increased, the number of electric gourds can be increased together to achieve the tonnage that requires loading. When installing oil tanks, there are many inverted construction methods. This method not only has a low construction cost, but also welded workers on the ground for more convenient construction. This construction method requires a large amount of electric gourd. When used, the gourd was installed on a dedicated edge column. The lower hook of the gourd is fixed on the tank, which is operated by the control cabinet. Many gourd linkages are connected to unified improvement.