Hydraulic engineering pressure water tank

The hydraulic engineering pressure water tank comprises a pressure water tank body, a water inlet pipe is arranged on the outer surface of one side of the pressure water tank body, an access hole is formed in the outer surface of the top end of the pressure water tank body, a shaft rod is installed on the inner wall of a bearing seat, and one end of the shaft rod is connected with a ball valve. The other end of the shaft rod is connected with a motor, a supporting frame is fixedly installed on the outer surface of the motor, and the bottom end of the supporting frame is fixedly connected with the outer surface of the top end of the pressure water tank body. The shaft rod is rotated to drive the ball valve to rotate, so that the internal pressure of the pressure water tank main body can be discharged from the through hole in the outer surface of the exhaust pipe, the overpressure risk borne by equipment and pipelines in the system is effectively reduced, damage is prevented, and the service life of the equipme