RU2166045C2 - Chimney stack - Google Patents

Abstract

FIELD: building parts of chimney stack structure. SUBSTANCE: chimney stack has external casing and internal gas-escape shafts. Casing of chimney stack stretches through height of shafts above their center of gravity on side of non-displacement attachment floor of shaft. Spring-loaded sliding guides are uniformly arranged inside casing through its height; each shaft is provided with bottom collar loosely embracing gas flue coaxially running to shaft. EFFECT: reduced material input; facilitated mounting procedure; improved resistance of casing to wind loads. 2 dwg

Description

 The invention relates to the construction part of the construction of chimneys, including the outer shell and internal exhaust pipes.

 In known chimneys [1], the exhaust pipes are mounted evenly on the suspensions to the outer shell, are equipped with compensators of a special design and have a hinged bearing on the foundation.

 The disadvantages of the known chimneys are the temperature and acid destruction of the expansion joints, the significant consumption of the barrel material in connection with the trunks resting on the foundation (the barrel walls below should be thicker than the walls above), the complexity of the suspension system design and their repair, the complexity of inter-operational repairs.

 The objectives of the invention are: reducing material consumption, simplifying installation, improving the operation of the shell on the effect of wind load.

 The problem is solved by executing the shell to a height exceeding the center of gravity of the exhaust trunks, where the platform for the non-removable mounting of the trunks is located, which is uniform in height by installing spring-loaded sliding guides inside the shell and supplying each of the trunks at the bottom with a cuff that freely covers the duct that is aligned with the barrel.

 In FIG. 1 shows a longitudinal section of a chimney consisting of a shell 1, gas exhaust shafts 2, supported immovably on the platform 3 of the shell 1, and the center of gravity of the trunks 2 at point 0 is located below the platform 3, and sections 1 of the gas shafts 2 are supported on the walls of the shell 1 through spring-loaded sliding guides 4. Each of the trunks 2 from the bottom is equipped with a cuff 5, freely covering the gas duct 6 brought in coaxially with the barrel 2.

 In FIG. 2 shows a cross section of a chimney 1-1.

 Under the action of the wind load on the shell 1 and on the trunks 2, the lower part of the trunks through the spring-loaded sliding guides 4 reduces the magnitude of this effect, working as a damper, which does not interfere with the gas duct 6 freely introduced into the cuff 5.

 The thermal expansion of the trunks 2 allows them to increase from the platform 3 and up and down, and the attachment at the level of the platform 3 allows the lower and upper sections of the walls of the trunks to make almost the same thickness.

 The installation of trunks 2 is facilitated by the installation of 3 lifting devices on the site, with the help of which it becomes possible to mount the trunks 2 with drawers, feeding them from the bottom up under more favorable conditions than in known chimneys.

Literature
1. Russian joint-stock company of energy and electrification. Department of Science and Technology. "Operating instructions for reinforced concrete chimneys with metal gas exhaust trunks at thermal power plants RD 34.21.562-93." ORGRES Excellence Service. Moscow 1995 - a prototype.

Claims (1)

 A smokestack comprising an outer shell and internal gas exhaust trunks, characterized in that the shell is made to a height exceeding the center of gravity of the gas exhaust trunks, where the platform for non-removable mounting of the trunks is located, spring-loaded sliding guides are uniformly in height and each of the trunks is equipped with a lower cuff, loosely embracing a gas duct aligned with the barrel.

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