Column relief valve

The utility model relates to a column relief valve, including the whole anchoring mechanism of valve body, disk seat, valve clack, valve rod, valve gap and spring pressure, mainly be that the whole anchoring mechanism of spring pressure installs on the valve rod in the valve gap outside, adjusting nut passes through the screw thread and installs on the clamp plate, and the clamp plate passes through screw rod fixed mounting on the valve body, set up manual opening mechanism between clamp plate up end and valve rod, this manual opening mechanism comprises handle, pin, dog, closing cap, and the handle is installed on the closing cap through the pivot, and dog fixed mounting is in the valve rod upper end, and the one end of shelves pole is located the dog below with the tip fixed connection of pivot, the other end. The spring mounting is in the air of valve gap outside, and medium temperature changes the influence of spring elastic force for a short time, and its set pressure stability is good, the blowdown pres