One-way valve structure of fire pump

The utility model discloses a one-way valve structure of a fire pump, which relates to the technical field of fire pumps and comprises a fire pump shell, a check valve shell, a motor, a fixed shaft, an impeller and a locking mechanism. The locking mechanism is arranged, the non-return mechanism is opened through water pressure, water flow can enter the fire pump shell along the inner wall of the non-return valve shell, meanwhile, locking of the fixing shaft can be relieved through the locking mechanism, the motor is started to drive the fixing shaft to enable the impeller to rotate, one-way conveying of water can be assisted, and the fire pump is convenient to use. When water conveying is stopped and the motor is closed, the non-return mechanism is automatically closed and can conduct non-return operation on water, meanwhile, the locking clamping block is driven by the movable pull frame to reset and is in meshed connection with the locking ring, and when the impeller rotates reversely under the impact of wat