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内浮顶油罐的组装式浮盘,是将在工厂制成的标准模块式构件运至施工现场后,按照构件安装顺序从油罐人孔送入罐内,用螺栓或铆钉组装成形。其造价低,安装速度快,使用安全可靠,降耗效果好。近20年,我国组装式浮盘的使用量超过5000台,且绝大多数是铝浮盘,其结构基本定型在铝合金骨架、浮力元件为浮筒的范畴之内。对国内常用组装式浮盘的结构合理性进行了分析:浮盘周向刚度较小,轴向刚度较大,以保障其顺利通过阻卡而不发生“折盘”;浮筒是浮盘的浮力元件,其分布越均匀越好,同时应使浮盘周边的浮力稍大;浮盘与油面间存在油气空间是保障内浮顶油罐和组装式浮盘安全运行的有利条件。密封装置是浮盘的关键构件,宜采用舌形密封。讨论了其他辅助构件如扩散管、盖板、支腿、通气窗、溢液管在设计、安装中应注意的问题。虽然组装式浮盘涉及的行业范围较窄,但其应用数量多,经济与社会效益大,而制造商的研发和生产能力不强,为此提出了组装式浮盘的发展建议。
Floating roof tank assembly floating plate is made in the factory standard modular components transported to the construction site, according to the order of member installation tank from the manhole into the tank, with bolts or rivets assembled form. Its low cost, fast installation, safe and reliable, reducing consumption effect. In the recent 20 years, the use of assembled floating plates in our country has exceeded 5000 units, and most of them are aluminum floating plates. The structure of the assembled floating plates is basically set within the framework of the aluminum alloy frame and the buoyancy elements are buoys. The structural rationality of the domestic commonly used floating assembly was analyzed: the circumferential rigidity of the floating plate is smaller and the axial rigidity is larger, so as to ensure its smooth passage through the blocking without “folding disc”; the floating cylinder is the floating disc Of the buoyancy components, the distribution of the more uniform the better, at the same time should make the buoyancy around the buoyancy slightly larger; there is oil and gas space between the floating plate and the oil surface is to protect the inner roof floating oil tank and assembly of the safe operation of the favorable conditions. Sealing device is a key component of the floating plate, should adopt the tongue seal. Discussed the other auxiliary components such as diffuser, cover, outriggers, ventilation windows, discharge pipe in the design, installation should pay attention to the problem. Although the assembly-type floating tray involves a narrow range of industries, but its application is large, economic and social benefits, and manufacturers R & D and production capacity is not strong, for this proposed the development of assembly-type floating plate.