Fixed ball valve with mechanical limiting structure

The utility model discloses a fixed ball valve with a mechanical limiting structure. The fixed ball valve comprises a valve body, a valve element, a valve rod and a motor. The valve body is provided with a fluid passage for communicating left and right; a circulation hole is formed in the middle of the valve element, a flow blocking body is arranged on the valve element in the direction back to fluid, the valve element is arranged in the valve body, the lower portion of the valve element is supported on a supporting shaft arranged on the lower portion of the valve body, the upper portion of the valve element is connected with the valve rod, the valve rod drives the valve element to rotate, and the valve rod penetrates through the upper portion of the valve body to be connected with the motor. The motor drives the valve rod to drive the valve element to rotate, the bluff body rotates to the side face of the fluid channel, the circulation hole is connected into the fluid channel, and the fluid channel is unbloc