Group hanging electric gourd is synchronized. The group hanging electric gourd is a DHP ring chain electric promotioner, which has a slow improvement and good synchronization performance. Suitable for the improvement of large equipment, multiple gourds can be simultaneously enhanced by a heavy object. The load specifications are 5 tons, 10 tons, 15 tons, 20 tons, 30 tons, and the standard chain is 3 meters. It is a disc motor, the G80 chain. The group hanging electric gourd has the characteristics of slow improvement and good synchronization. When the large storage tank is made and installed, it is widely used. For example: oil tank, gas cabinet, sulfate tank, sewage tank, aggregate warehouse, etc. During construction, the upper hook of the gourd is installed at a fixed point, and the lower hook is fixed on the heavy object. Multiple gourds are improved by control boxing. These tanks are usually after the welding of steel plates is completed. Raise the tank and make the next layer of installation. Therefore, the role of a group of electric gourds in tanks is to start the tank.