High-temperature-resistant and high-pressure-resistant automobile expansion valve seat

The utility model relates to the technical field of expansion valves, in particular to a high-temperature-resistant and high-pressure-resistant automobile expansion valve seat. According to the technical scheme, the valve seat comprises an outer reinforcing layer, a valve seat body and a limiting ring, a cooling pipe is fixedly connected to the periphery of the valve seat body, cooling fins are installed on the surface of the cooling pipe in an embedded mode, the outer reinforcing layer is arranged on the periphery of a high-temperature-resistant layer, a positioning ring is fixedly connected to the position, on the top of the outer reinforcing layer, of the periphery of the valve seat body, and a limiting rod is movably installed on the periphery of the limiting ring; limiting blocks are movably installed on the sides, close to each other, of the limiting rods. By means of combination of various structures, the automobile expansion valve seat has good high-temperature-resistant effect and strength, the situa