| 摘要 |
<p>A vent cap system 10 includes a top plate 12, a centre stem assembly 14, a retainer assembly 16 attached to the top plate, a bottom plate 18, a flange assembly 20 with a connection end 64 for installation on a suction pile and a plurality of perimeter stem assemblies 22. The centre stem assembly extends from the top plate, through threaded engagement to the retainer assembly, and to the bottom plate. Rotation of the centre stem assembly moves the bottom plate between opened and closed positions, relative to the top plate and flange assembly. The perimeter stem assemblies hold the relative position of the top plate to the flange assembly, and the bottom plate seals against the flange assembly, when the system is in the closed position. The bottom plate has a bottom alignment pin 52 to assure alignment of the bottom plate to the flange assembly for any orientation of the vent cap system.</p> |
