Butterfly-gate-type throttle valve

The utility model aims to provide a butterfly-gate-type throttle valve which comprises a valve body, a hollow rotation shaft, a butterfly plate, a main throttle plate, a gate plate, a rotary support, a screw and a connecting rod. The main throttle plate is fixed into the valve body, the outline of the main throttle plate is attached to the lateral wall of the valve body, a butterfly plate hole and a first main throttle plate throttle hole are formed in the main throttle plate, the butterfly plate is arranged in the butterfly plate hole, the lower portion of the hollow rotation shaft is installed in the valve body, the upper portion of the hollow rotation shaft penetrates out of the lateral wall of the valve body, internal threads are arranged in the hollow rotation shaft, the rotary support is fixed onto the lateral wall of the valve body, internal threads are arranged in the rotary support, the screw is installed in the rotary support and the hollow rotation shaft at the same time and matched with the internal threads of the rotary support and the internal threads of the hollow rotation shaft respectively, a hand wheel is installed at the end of the screw, a handle is installed on the upper portion of the hollow rotation shaft, the lower portion of the hollow rotation shaft is connected with the butterfly plate, the connecting rod and the gate plate are arranged in the valve body, the lower end of the connecting rod is connected with the gate plate, the upper portion of the connecting rod is installed in the hollow rotation shaft. The butterfly-gate-type throttle valve has the use advantages of a butterfly valve and the use advantages of a gate valve at the same time.