REFUSE CHUTE SHAFT SECTION Russian patent published in 2007 - IPC E04F17/12 

FIELD: construction, particularly refuse chutes to remove domestic waste and ventilation shafts of building or building structure.

SUBSTANCE: refuse chute shaft section is made as laminated fiberglass plastic pipe of cylindrical shape and preferably provided with widened end section. The pipe includes at least three fiberglass plastic layers formed by winding solid glass tissue webs and/or glass mats having widths of not less than 0.9 m and/or cut into rolls having widths of not less than 0.05 m on shaping mandrel. Fire-resistant binding agent having life of not less than 6.5 hours at 18-25°C temperature is applied between fiberglass plastic layers during winding thereof on shaping mandrel. Fire-resistant binding agent is mixture including 100 parts by weight of polyester resin and 0.8-2.5 parts by weight of methylethylkonate or 1.0-3.0 parts by weight of cyclohexane taken in amount enough to impregnate inner layers of refuse chute shaft section. Glass tissue webs are wound in several strips along section length and overlap each other along helical line so that each next turn overlaps previous turn for width of not less than 0.2 of glass tissue web width to be wound on shaping mandrel. During refuse chute assemblage the first wound strip is the uppermost one. Glass tissue webs may be wound in several strips so that strips of adjacent layers are oriented in opposite directions. Glass tissue webs may be also wound in several serial overlapped annular strips located along section length. The annular strips are located so that each next strip overlaps previous one for not less than 0.1 of glass tissue web width. During refuse chute assemblage the first wound strip is the uppermost one. Glass tissue layers may be wound on shaping core in alternating mode and include ones formed by helical and annular strips. Glass tissue web width is equal to refuse chute shaft section height.

EFFECT: increased efficiency of refuse chute usage due to decreased inner surface damage caused by impact action to be applied thereto during refuse chute usage, improved sanitary efficiency, enhanced assemblage conditions and increased maintainability of refuse chute shaft sections.

6 cl, 1 dwg