Ground driving screw pump anti-reverse apparatus

The utility model relates to a ground driving screw pump anti- reverse apparatus, which is mainly designed for solving the problem of losing anti-reverse function because of ineffective brake of existing anti-reverse apparatus. The ground driving screw pump anti- reverse apparatus comprises a freewheel clutch, a liquid braking device and a hand-operated brake, a control rack body of the brake disc control rack is installed on a speed reducer main shaft neck; an arc-shaped plate and a pulling plate are set on the control rack body; a screw and a long nut connected to the pulling plate are cooperated by screw thread; a screw rod sleeved with a spring outside extends out from a bracing frame; brake disc rim tooth is set on the brake disc outer circle of the liquid braking device; a trigger pawl is installed inside the brake disc; an opening is set on the brake disc; the trigger pawl and the trigger pawl spring fixed inside the brake disc are fixed; an extension spring on the speed reducer housing is connected wi