Light and small high-temperature fuel gas plug valve capable of continuously adjusting thrust

The invention relates to a light and small high-temperature fuel gas plug valve capable of continuously adjusting thrust, and belongs to the technical field of solid attitude and orbit control engines. The valve cavity heat insulation layer is installed in the valve shell. The valve rod is installed in the valve shell. One end of the valve rod is located in the valve cavity, the other end of the valve rod is connected with the driving device through an adapter, and the controller controls the driving device through a control circuit to drive the valve rod to rotate to achieve opening and closing of the plug valve. The pressing plate penetrates through one end of the valve rod to be installed on the valve shell. The valve cavity supporting ring is coaxially installed in the valve cavity heat insulation layer. A first cavity communicated with an engine combustion chamber and a second cavity perpendicular to and communicated with the first cavity are formed in the valve rod, fuel gas flows in the cavities, and t