Oil pipe loop system of metal hot forging forming machine

The utility model relates to the technical field of metal hot forging forming, and particularly discloses an oil pipe loop system of a metal hot forging forming machine, which comprises a main oil cylinder, an energy accumulator group, an oil pump group and an oil storage tank, an upper cavity opening of the main oil cylinder is communicated with an oil discharge opening of the energy accumulator group and is provided with an energy storage oil discharge valve, and a lower cavity opening of the main oil cylinder is provided with a pressure control valve group. A first self-weight fast descending valve and a slow descending valve are connected between the pressure control valve set and the main oil cylinder in parallel, the oil inlet end of the energy accumulator set is connected with the output end of the pressure control valve set, the output end of the pressure control valve set is communicated with an upper cavity opening of the main oil cylinder, and a main cylinder oil inlet valve and an upper cavity oil