Safety valve for external pressure testing machine

The utility model discloses a safety valve for an external pressure testing machine, which comprises a valve body and a main mounting structure of equipment, a test pipeline is connected inside the valve body, a chute and a fluid channel are arranged inside the valve body, and the fluid channel is positioned at the middle end of the valve body; the first arc-shaped plate is located at the left end of the interior of the valve body, and a lower channel is formed in the first arc-shaped plate; and the second arc-shaped plate is located at the right end of the interior of the valve body, and an upper channel is formed in the second arc-shaped plate. According to the safety valve for the external pressure testing machine, the two arc-shaped plates are arranged in the valve body, the arc-shaped plates are connected with the resistance push plate, under the influence of pressure, fluid in a pipeline can be discharged from a channel through position overlapping of the arc-shaped plates, the more the pressure is, the