Self-weight type explosion relief check valve

Abstract

The utility model relates to a kind of self-weight formula blow-off check valve, including vacuum pipeline, valve plate assembly and limiting component;The outlet of the vacuum pipeline is equipped with the bottom flange of end face upward inclination, the valve plate assembly is rotatably connected on the outlet of the vacuum pipeline top and including the cover flange matched with the bottom flange;The limiting component includes limiting arm, the first end of the limiting arm is connected to the back of the cover flange, and the second end extends to the vicinity of the upper wall of the vacuum pipeline.In the utility model, because the bottom flange is inclined, when the valve plate is closed, there is always a component of gravity to block the outlet of the vacuum pipeline;The change that the limiting component is arranged on the back of the valve plate assembly can further increase the size of closing force, so as to play a greater role of gravity check valve;When the valve plate rotates upward, the second end of the limiting arm limits the maximum opening of the valve plate by abutting against the outer wall of the vacuum pipeline.

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