DOUBLE SEAL STRUCTURE OF INNER CAVITY OF BUILT-IN VALVE FOR INTELLIGENT GAS METER

摘要

The present invention relates to the technical field of gas meter components, and in particular to a double seal structure of an inner cavity of a built-in valve for an intelligent gas meter. The double seal structure comprises a valve body, a power source and a seal sleeve installed between the valve body and the power source; the valve body is provided with an air inlet and an air outlet; a valve core and a plugging device are arranged at the bottom of the air outlet; a valve rod is disposed at the bottom of the plugging device; the valve rod penetrates the seal sleeve to be connected with the power source; the plugging device comprises a turntable and fan blades; the fan blades are evenly arranged on the edge of the turntable; the valve core comprises a casing and an air guide disc arranged in the casing; and the air guide disc is provided with notches matched with the fan blades. In the present invention, the double seal structure is reasonable and compact in design; a double seal effect is achieved through effects of the power source, the sealing element and the seal sleeve as well as sealing oil layers disposed at the upper end and the lower end of the rotating shaft, gas can be prevented from entering a box outside the power source and leading to spontaneous combustion fires and the like, and the double seal structure is safe and convenient to use and stable in performance.