| 摘要 |
PURPOSE: An automatic air discharge valve is provided to remove the inside air of a pipe using fuel and buoyancy of the air by providing a flotation member, which is made of material that is lighter than water or oil but heavier than the air. CONSTITUTION: An automatic air discharge valve includes a body(110) and a flotation member(210). The body has an upper cover(120), a first cylindrical body(130) connected to the upper cover at an upper end and a lower cover(140) connected to a lower end of the first body. The upper cover, lower cover and the first body restrict a first chamber(136). The upper cover has a first through hole(122) being wider toward the inside and the lower cover has a projection(144) extending downwardly at a lower end of the lower cover and a second through hole(142) extending from an upper end of the lower cover to the lower end. The flotation member is disposed in the first chamber and a portion of the flotation member is disposed in the inside of the first through hole. The flotation member has a flotation case and a flotation(240) moves vertically in the inside of the flotation case.
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