Water outlet joint structure of fire pump

The invention relates to a water outlet joint structure of a fire pump, which belongs to the technical field of fire-fighting equipment. The water outlet joint structure of the fire pump comprises a joint body with a water inlet of the joint body, wherein at least two fire-fighting hose interfaces used for the matching connection of fire-fighting hoses, which are communicated with a joint body cavity of the joint body, are arranged on the joint body in an extending way. The water outlet joint structure of the fire pump is characterized in that a liquid return hole is also arranged on the joint body; moreover, the position on the joint body, which corresponds to the liquid return hole, is provided with a pressure relief mechanism in a matching way; and the pressure relief mechanism is used for carrying out pressure relief on the joint body cavity by the liquid return hole. Because the liquid return hole communicated with the joint body cavity is arranged on the joint body and the position corresponding to the liquid return hole is also provided with one pressure relief mechanism, the operation of pressure relief can be carried out by the pressure relief mechanism when the fire-fighting hoses connected to the fire-fighting hose interfaces are not at the state of wholly starting yet, and the condition that a fire-fighting hose which is currently used can be damaged because the pressure is suddenly increased can be avoided; and moreover, water discharged by the pressure relief mechanism can flow back to a water inlet of a fire pump, so that the wastage of water resources can not be caused.