| 摘要 |
The present invention relates to a double joint installation structure of sealant fitting for a large valve. The double joint installation structure can be applied more effectively to a large valve which is costly and extremely heavy. The double joint installation structure comprises a mounting connection pipe (100) fixed to an outer part of a large valve (10); a lower flanged housing unit (200) fixed to an upper edge of the mounting connection pipe (100), and having multiple fastening holes (210) pierced, a fluid passage (220) passing through an inner center thereof for introducing fluid into a valve, and a primary counterflow prevention unit (230) at an upper side of the fluid passage (220) for primarily preventing the counterflow of a fluid; and an upper flanged housing unit (300) installed at an upper side of the lower flanged housing unit (200) in multilayer, and having multiple fastening holes (310) perforated, a fluid passage (320) formed at an inner center, a secondary counterflow prevention unit (330) inside the fluid passage (320) for secondarily preventing the counterflow of a fluid, and a fluid inlet (340) at an edge of an upper side of the fluid passage (320), wherein the lower flanged housing unit (200) and the upper flanged housing unit (300) are interlocked in a vertical direction and firmly coupled to each other by multiple fastening bolts (400). |
