SMOKE STACK AND METHOD OF ITS ERECTION Russian patent published in 1998 - IPC

FIELD: construction engineering. SUBSTANCE: this is used in thermal electric power stations and other industrial objects. Smoke stack has outer shell (framework) 1, and titanium gas branching tube 2 located inside it which is assembled of separate sections 3. Each section 3 can freely enter and locate itself in lower positioned section. Lower end of each section is widened in the form of shoulders, and upper end is narrowed. Entire tube 2 is suspended relative to upper end of shell 1. All sections required for mounting gas-branching tube of stack are assembled in the form of successively and concentrically fitting into each other. Upper most section with minimal inner diameter is found inside, and lower most is outside. Upper part of inner section 3 is fastened to load-lifting mechanism 4 resting on upper part of outer shell 1 and is step-like raised at pitch equal to height of section. In that, lower part with shoulders of section being raised enters narrowed upper part of next section, and lower section is thus hung on adjacent upper section. Assembled unit of two sections is raised for one pitch more and so on until entire tube is raised. In function of load-lifting mechanism, aerostat balloon can be used. In disassembling, rope which holds tube is loosened and sections 3 are lowering inside each other. EFFECT: high efficiency. 6 cl, 3 dwg