Multifunctional prevention and control locking gate valve

The utility model belongs to the technical field of gate valves, and particularly relates to a multifunctional prevention and control locking gate valve which comprises a valve body, a valve plate is movably arranged in the valve body, a valve rod is installed on the upper side of the valve plate, a connecting block is installed at the bottom of the valve rod, a connecting groove corresponding to the connecting block is formed in the upper side wall of the valve plate, and the connecting groove is connected with the valve plate. A mounting groove is formed in the connecting block, a baffle is fixedly arranged in the mounting groove, springs are installed on the two sides of the baffle, limiting plates are arranged at the side ends of the springs, limiting blocks are arranged on the plate walls of the limiting plates, and the valve rod can be in butt joint with the valve plate under the combination of the connecting block and the connecting groove. The position of the limiting block can be conveniently moved u