RESERVOIR FLOATING ROOF WATER DRAIN Russian patent published in 1998 - IPC

FIELD: collection and removal of water from reservoir floating roof. SUBSTANCE: device has drain holes with connecting branch pipes on floating roof and on reservoir wall connected by corrugated metal pipeline made of stainless steel. Pipeline has flexible tie-rods secured in middle part of pipeline and connected to floating roof of reservoir for lifting middle part of pipeline in synchronism with floating roof. Flexible pipeline is provided with spiral corrugations and is arranged over spiral relative to axis of reservoir in direction coinciding with direction of pipeline corrugations. Diameter of spiral is not less than 10-fold diameter of pipeline. Length of flexible tie-rods is equal to the shortest distance in radial plane of reservoir section from point of their attachment on hose to place of attachment on roof. Places of attachment of flexible tie-rods are arranged on roof over diameter not less than 20 diameters of pipeline. EFFECT: enhanced manufacturability, increased service life of water drain. 2 dwg