Manual safety release valve

The utility model discloses a manual safety relief valve, which comprises a valve body, a hand wheel, an adjusting nut, a relief hole, a needle head and a channel hole, the valve body is of a hollow structure, the relief hole is arranged on the side face of the valve body, the channel hole is arranged at the bottom of the valve body, the hand wheel is rotated to drive the needle head to move up and down, the relief valve is opened, and pressure is released from the relief hole. According to the manual safety release valve, pressure flows out from the side release hole, and the safety of workers in the release working process is improved; the conical alloy needle head is adopted for sealing, in the up-and-down moving process of the needle head, the situation that the needle head collides with a channel hole to damage a sealing face can be effectively avoided, operators are prevented from being accidentally injured, and safety is further improved. The manual safety release valve is simple in structure, convenie