Draught beer relief valve

The utility model belongs to the common tool field just discloses a draught beer relief valve, including defeated wine pipe, choke valve, compression carbon dioxide jar, limit bayonet, defeated wine pipe middle part fixedly connected with choke valve, connecting pipe when defeated wine pipe one end fixedly connected with opens, defeated wine pipe and when opening the connecting pipe be connected the position and be equipped with limit bayonet, gas -supply pipe one end can be dismantled with compression carbon dioxide jar and be connected, gas -supply pipe other end opening part lies in into jiu kou, the connecting pipe below is equipped with the hydraulic pressure inductor when opening. The utility model discloses a connecting pipe when being equipped with when opening the connecting pipe and closing, can guarantee the draught beer bucket when opening not the entrained air through being equipped with waterproof film, can make the draught beer bucket in that to open when drinking the leakproofness good in orde