SU734380A1

SU734380A1 - Flue

Info

Publication number: SU734380A1
Application number: SU782678466A
Authority: SU
Inventors: Исаак Аронович Могилевский
Priority date: 1978-07-31
Filing date: 1978-07-31
Publication date: 1980-05-15

Description

Изобретение относится к области строительных конструкций и может быть использовано при строительстве дымовых труб.The invention relates to the field of building structures and can be used in the construction of chimneys.

С поверхности цилиндра, помещенного в воздушный поток, происходит срыв вихрей, что приводит к возникновению знакопеременных сил, воздействующих на цилиндр и направленных поперек потока. При совпадений частоты срыва вихрей с частотой собственных колебаний цилиндра происходит его резонансное раскачивание.From the surface of the cylinder placed in the air flow, the vortices break off, which leads to the appearance of alternating forces acting on the cylinder and directed across the stream. When the frequency of vortex disruption coincides with the frequency of natural oscillations of the cylinder, its resonant sway occurs.

Известно сооружение типа трубы, включающее ствол и расположенные по его высоте гасители колебаний. Каждый гаситель колебаний выполнен в виде имеющей флюгер оболоч- , ки, установленной с возможностью поворота относительно ствола башни, причем оболочки смонтированы на высоте ствола с возможностью поворота одной относительно 'других (1 ].A pipe-type structure is known, including a trunk and vibration dampers located along its height. Each vibration damper is made in the form of a shell having a weather vane, mounted rotatably relative to the barrel of the tower, and the shells are mounted at the height of the barrel with the possibility of rotation of one relative to the others (1].

Наиболее близким техническим решением является дымовая труба, включающая ствол с расположенным на нем обтекателем в виде оболочки с флюгером, шарнирно закрепленным к стволу в его верхней части [2].The closest technical solution is a chimney, including a barrel with a fairing located on it in the form of a shell with a weather vane, pivotally mounted to the barrel in its upper part [2].

Действие этих гасителей основано на том, гго срыв вихрей происходит не с цилиндрической части трубы, а смещается вниз по ветровому потоку, частота срывов уменьшается, снижается величина отрицательного давления. Недостатком этого изобретения является то, что усложнение конструкции трубы используется лишь для гашения поперечных колебаний трубы.The action of these dampers is based on the fact that the vortex breakdown does not occur from the cylindrical part of the pipe, but is shifted down the wind flow, the frequency of breakdowns decreases, and the negative pressure decreases. The disadvantage of this invention is that the complexity of the design of the pipe is used only to dampen the transverse vibrations of the pipe.

Целью изобретения является увеличение высоты выброса газа.The aim of the invention is to increase the height of the gas emission.

Указанная цель достигается тем, что в дымовой трубе, включающей ствол с расположенным на нем обтекателем, в виде оболочки с флюгером, шарнирно закрепленным к стволу в его верхней части, во внутренней полости обтекателя установлена насадка, шарнирно прикрепленная к торцу ствола, а форма насадки подобрана форме обтекателя.This goal is achieved by the fact that in the chimney, including the barrel with a fairing located on it, in the form of a shell with a weather vane, pivotally mounted to the barrel in its upper part, a nozzle is installed in the inner cavity of the fairing, pivotally attached to the barrel end, and the shape of the nozzle is selected fairing shape.

На фиг. 1 схематично изображена дымовая труба в аксонометрии; на фиг. 2 - труба, вертикальный разрез; на фиг. 3 - разрез А--А фиг. 2.In FIG. 1 schematically shows a chimney in a perspective view; in FIG. 2 - pipe, vertical section; in FIG. 3 - section A - A of FIG. 2.

' 3'3

Дымовая труба включает обтекатель 1, насаженной на верхнюю часть ствола трубы 2 и имеющей возможность'· вращения с помощью подшипников 3, передающих вертикальные и горизонтальные реакции от оболочки. Верхний участок газохода — насадка 4 имеет возможность вращения совместно с обтекателем за счет шарнирного прикрепления к торцу ствола трубы и повернута выходным отверстием 5 в сторону хвостовой части 6 обтекателя. При развороте оболочки 1 по ветру выходное отверстие 5 газохода 4 располагается с подветренней стороны ствола трубы 2.The chimney includes a cowling 1, mounted on the upper part of the barrel of the pipe 2 and having the possibility of rotation by bearings 3, transmitting vertical and horizontal reactions from the shell. The upper section of the gas duct - the nozzle 4 has the ability to rotate together with the fairing due to the hinged attachment to the end of the trunk of the pipe and is turned by the outlet 5 towards the tail portion 6 of the fairing. When turning the shell 1 in the wind, the outlet 5 of the duct 4 is located on the leeward side of the barrel 2.

Такая конструкция является не только гасителем колебаний, но выполняет ряд функций.This design is not only a vibration damper, but performs a number of functions.

При любой скорости и направлении ветра разворот гасителя по ветру обеспечивает отрыв шлейфа дыма от трубы, предотвращая опускание загрязненного газа с подветренной стороны трубы и связанную с этим коррозию констукций.At any speed and direction of the wind, the turn of the damper in the wind ensures that the smoke loop is torn off the pipe, preventing the contaminated gas from lowering from the leeward side of the pipe and the associated corrosion of the structures.

Конструкция создает дополнительный отсос у выходного отверстия трубы, что увеличивает ее пропускную способность или позволяет уменьшить ее диаметры.The design creates an additional suction at the outlet of the pipe, which increases its throughput or reduces its diameters.

Кроме того, при выбросе горячих газов увеличивается фактическая высота выброса, так как хорошо обтекаемый оголовок трубы ^; минимально турбулизирует поток и выпускаемый вдоль потока газ, не холодным воздухом, перемешиваясь с более дольше сохраняет высо734380 4 кую температуру и, следовательно, дольше продолжается его подъем. При заданной высоте выброса это равносильно снижению необходимой высоты трубы.In addition, when ejecting hot gases, the actual ejection height increases, since a well streamlined pipe head ^; minimizes turbulence of the flow and the gas discharged along the flow, not with cold air, mixing with a longer temperature preserves a higher temperature and, therefore, its rise lasts longer. At a given ejection height, this is equivalent to a reduction in the required pipe height.

. Таким образом, данное устройство незначительным усложнением конструкции обеспечивает улучшение таких существенных качеств трубы как ее пропускная способность, высота выброса газа, незадуваемость, защита от коррозии. Эффективность применения данного устройства возрастает с увеличением высоты трубы.. Thus, this device with a slight complication of the design provides an improvement in such essential qualities of the pipe as its throughput, gas discharge height, non-blown, corrosion protection. The effectiveness of this device increases with increasing pipe height.

Claims

The invention relates to the field of building structures and can be used in the construction of chimneys. Vortex breakdown occurs from the surface of a cylinder placed in the air flow, which leads to the appearance of alternating forces acting on the cylinder and induced across the flow. When the frequency of vortex breakdown coincides with the frequency of natural oscillations of the cylinder, its resonant deflection occurs. A pipe-type structure is known, which includes a barrel and vibration dampers located along its height. Each oscillation damper is made in the form of a sheathing vane mounted rotatably with respect to the barrel of the tower, and the shells are mounted at the height of the barrel with the possibility of turning one relative to others 1. The closest technical solution is a flue pipe, including a casing with a fairing in the form of a shell with a wind vane hinged to the trunk in its upper part 2. The action of these dampers is based on the fact that the breakdown of the vortices does not occur from the cylindrical part of the pipe, but shifted down the wind flow, the frequency of disruption decreases, the magnitude of negative pressure decreases. The disadvantage of this invention is that the complexity of the pipe design is used only to dampen the transverse vibrations of the pipe. The aim of the invention is to increase the gas emission height. This goal is achieved by the fact that in a chimney comprising a barrel with a fairing located on it, in the form of a sheath with a wind vane hinged to the barrel in its upper part, a nozzle mounted in the inner cavity of the fairing is attached to the barrel end, and the shape of the nozzle is selected form of a fairing. FIG. 1 schematically shows a flue pipe in axonometric view; in fig. 2 - pipe, vertical section; in fig. 3 - section A - A of FIG. 2. -, 3 The chimney pipe includes a bucket 1, mounted on the upper part of the trunk of pipe 2 and having the possibility of rotation with the help of bearings 3, transmitting horizontal and horizontal reactions from the shell. The upper part of the flue duct 4 can be rotated together with the fairing by means of a hinge attachment to the end of the barrel and the noBepHirra outlet 5 to the side of the tail section 6 of the fairing. When turning around Obol I, wind the outlet. 5 of the duct 4 is located on the leeward side of the barrel of the tube 2. Such a structure is not only an oscillation oscillation, but performs a number of functions. At any speed and direction of the wind, the reversal of the extinguisher in the wind ensures the separation of the armature plume from the pipe, preventing the contaminated gas from lowering on the leeward side of the pipe and the associated corrosion of the pipeline. The design creates an additional suction at the outlet of the pipe, which increases its capacity or reduces its diameters. In addition, when emitting hot gases, the actual height of the emission increases, since the well-streamlined tip of the pipe allows for a turbulent flow and discharge along the flow of gas without mixing with colder air, retains a high temperature longer and, consequently, its rise continues . At a given height of Bbi6poca, this is equivalent to reducing the required height of the pipe. . Thus, this device by a minor complication of the design provides an improvement of such essential qualities of a pipe as its carrying capacity, height of gas emission, non-creepiness, protection from corrosion. The effectiveness of this device increases with increasing pipe height. Claims of the invention A smoke pipe including a barrel with a fairing in the form of a shell with a wind vane hinged to the trunk in its upper part, which has a hinge in the inner cavity of the fairing. attached to the end of the trunk, and the shape of the nozzle is similar to the shape of the fairing. Sources of information given into consideration in the examination 1. USSR author's certificate number 296872,. E 04 B 1/62, 1970.

2. USSR author's certificate number 575405, cl. E 04 H 12/28, 1977.

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