SU1763626A1 - Exhaust pipe - Google Patents

Abstract

Use: construction of high-altitude exhaust pipes. SUMMARY OF THE INVENTION: The gas exhaust trunk is made of gas-filled sections of annular air shells. The barrel is provided with coaxially placed and having longitudinal ribs shells with thermal insulation e gap between them. The sections of the pneumatic membranes are framed with a net of synthetic fibers and an anti-icing coating. Weathervanets are installed between the sections. At the top of the barrel is a cigar-shaped rotating shell with inflatable elements, a nozzle and a weather vane. The support part is made in the form of a plate, supported by a ball with a hole on the base covered with fluoroplastic, with longitudinal cables fixed to the support part by means of a winding drum with the top of one of the sections of the air shells. 3 or

Description

(L

WITH

The invention relates to the field of construction, in particular tall tube tubes.

A chimney pipe is known, comprising a reinforced concrete shell and a gas exhaust trunk made of a synthetic film in the form of a cylindrical shell, the cavity of which is filled with compressed gas.

The disadvantage of such a pipe is the high consumption of materials and the susceptibility to deformations due to wind loads and, therefore, low reliability.

Known chimney installed above the building, which in the upper part has an inflatable structure made of synthetic film. However, this pipe is not self-supporting, its structure is not rigid, therefore it has a high deformability from wind loads and

can not be used in the construction of high-rise chimneys.

The closest to the technical essence of the present invention is an exhaust pipe comprising a gas exhaust trunk from rasoMV-filled sections of annular air shells with diaphragm-1 at the ends and a frame made of longitudinal cables located inside and outside the trunk, and the diaphragms have through holes and provided on the outer diameter of the ring washers aerodynamic profile, and the inner cables and part of the outer rigidly attached to the diaphragms, and the remaining outer cables passed through the holes in Aperture and secured at the top and at the bottom of the barrel.

A disadvantage of the known solution is the impossibility of performing the most efficient lower pneumatic

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sections, since they will be under the hollow weight of the fastening (create rigidity of the structure) of the cables,

In addition, when performing ultrahigh pipes (compared to existing ones), the weight of an individual cable will be so large that it will cause it to break at the top.

The aerodynamic profile ring washer is also ineffective, because the incoming air flow to this washer on the front side causes a positive reaction, moving the pipe towards the wind, and from the back side, the brake on the ring profile causes a force that reduces the positive effect mentioned above. .

The air flow, moving along the profile like a ring, causes a torque, and since it is variable in time (like the wind itself), fatigue stresses of materials arise, especially in cables, which significantly affects the reliability of the structure. ,

The aim of the invention is to reduce material consumption and increase reliability.

This goal is achieved by the fact that an exhaust tube comprising a gas exhaust trunk from gas-filled sections of annular air shells with diaphragms at the ends and longitudinal cables fixed to the support part, according to the invention, is equipped with at least a pair of coaxially arranged shells with longitudinal ribs with thermal insulation in the gap between them, a net of synthetic fibers and an anti-icing coating, weathercocks installed between the sections of the annular air shells, and placed on top of the cigar barrel O-shaped rotary shell with inflatable concentric elements with a nozzle and a vane with rotary wings, while the supporting part is made in the form of a plate supported by a ball with a hole on the fluoroplastic-coated base, and the longitudinal cables are connected to the top of one of the sections of the pneumatic shells of the lower part of the barrel and fixed on the supporting part by means of a reel drum.

Comparative analysis with the prototype shows that the proposed pipe is different in that the sections of the annular air shells are framed with a strength grid and have an anti-icing coating, the framework in the prototype is made of longitudinal inner and outer cables, and in the proposed technical solution no less than two thin-walled shells located coaxially and having longitudinal ribs, the space between which is filled with light heat insulation, creating simultaneously increasing rigidity

designs.

Aerodynamic elements - in the prototype are installed on the outside of the pipe, on top of the outer pneumatic shell, ring washers rigidly fastened with

0 diaphragms of sections of annular air shells, in the proposed technical solution between sections there is a vane with two rotary wings and a front aerodynamic wing, having the ability to rotate around the frame between sections.

In addition, the proposed technical solution differs from the prototype by the presence of a cigar-shaped rotating element,

0 the casing of which is made of plastic and inside which there are inflatable concentric elements and a nozzle for accelerating gases. Thus, the proposed exhaust pipe meets the criterion of invention shade novelty,

Comparison of the proposed solution not only with the prototype, but also with other technical solutions in the field of technology did not allow finding solutions

0 with similar traits. This allows us to conclude that the technical solution meets the criterion of significant differences.

FIG. 1 shows the exhaust pipe,

5 incision; in fig. 2 shows section A-A in FIG. one; Fig, 3 - air membrane, type C.

The exhaust pipe includes a flexible elastic vapor pipe 1, made of gas-filled sections.

0 air shells 2 with diaphragms 3 at the ends, frame 4, longitudinal cables 5, cigar-shaped rotary sheath 6 rotating around the axis of the pipe, vane with swiveling wings 8, support ball 9 s

5 hole in the middle for the passage of gases

base 10 under the ball having a hole

for the passage of gases, stationary pipe 11.

At the top of the exhaust pipe has

hatch 12, under which the top is installed,

0 teflon-coated ring 13, and the lower 14-under cigar-shaped rotary sheath 6.

Cigar-like rotary shell 6 is made of inflatable concentric

5 elements 15, plastic covers 16 and has a nozzle 17 for accelerating gases.

Sections of pneumatic membranes 2 are framed with a strength grid 18 made of synthetic fibers, for example, of the Kevlavr-29 type and anti-icing coating 19.

The frame 4 is made of three thin-walled shells 20, 21, 22 arranged coaxially and having longitudinal ribs, the space between which is filled with thermal insulation 23, creating simultaneously an increase in the rigidity of the structure.

Between the sections of pneumatic shells are installed vane, having movable aerodynamic wings 24, guiding elements 25 and a turning mechanism 26, and front aerodynamic wing 27. Longitudinal cables 5 are connected to the top of one of the sections of pneumatic membranes of the lower part of the trunk and fixed to the supporting part 29 by means of a winding drum 28. The mounting plate 30, together with the support ball 9, abutting against the base 10, coated with fluoroplastic to reduce friction, is held by the base — a stationary pipe 11, having a nozzle 31, for the entrance of gases. In the upper part of the pipe 1, inside the cavity of a cigar-shaped rotary shell 6, windows 32 are provided for the release of gases into the cavity,

The device works as follows.

Flue gases through the nozzle 31 to enter the gases through the base pipe 11, the hole in the base 10 under the support ball 9, through the hole in it mounting plate 30, pass through the internal cavity of the exhaust pipe 1, having a frame of several thin-walled pipes edges (20, 21, 22). The passage through all sections of the annular shells (type C), the gases enter through the openings 32 to release the gases into the cavity of the cigar-shaped rotary shell 6 covered with plastic 16 and is ejected through the nozzle 17 into the environment.

The gas accelerated in the nozzle falls on the pivoting wings 8, which causes the force that guides the top of the entire device in the opposite direction and thus compensates for at least part of the effective wind force on the chimney.

At considerable heights of the exhaust pipe, winds always act along its height and even in different directions. To counteract this effect, no less than two (practically through each section) aerodynamic devices are installed, consisting of elements 24,25,26 (i.e. a vane with re-wings and front aerodynamic wing 27), which are deployed at different heights according to the wind at these heights.

In connection with the cheapness of microprocessor devices and actuators in relation to the cost of the pipe, it is advisable to use them to change the angle of attack of the movable aerodynamic wings 24 and 27 of the vane using the turning mechanism 26.

The longitudinal torsos 5 contract several sections of the annular air shells into one large one, and thereby create greater rigidity of the structure to combat the action of the wind.

In the lower part of the exhaust pipe, the same cables 5 are connected to the reels of the winding 28, mounted on the support part 29, and with wind force that threatens the integrity of the exhaust pipe design, the drums 28 wind or uncoil the cables 5, thus reducing frontal force winds on the pipe, leaning towards the wind. In the limit, with hurricane winds, the pipe takes a horizontal position.

Each section of the annular air shells is self-supporting and has a negative, on the order of one percent, weight. Then the total negative weight of the pipe will be 25-30% to compensate for the weight of the emergency exit of several sections at the same time out of service.

The support ball 9 contacts the element 10 through a fluoroplastic coating in order to reduce friction when restoring the vertical position of the pipe after wind action.

For weathering conditions that contribute to the appearance of icing, it is envisaged to use a coating of 19 anti-ice effect.

In order to increase the rigidity of the sections of the annular shells, the central tube of the framework is composed of several thin-walled tubes with ribs, between which is lightly heat-insulated.

The same purpose is served by the strength grid 18 of synthetic fibers, attached to the upper and lower diaphragms of 3 sections of annular shells.

The use of the proposed exhaust pipe ensures, due to a large pressure difference, an increase in the drag force of the transported gases and makes it possible to refuse blowing, for example, fans when the proposed pipe is operated as part of a thermal power plant.

The elimination of high-capacity lifting equipment during the construction of the exhaust pipe leads to cheaper construction, the elimination of high-altitude work both during construction and during operation.

The use of the proposed exhaust pipe allows industrial gaseous products to be discharged to a greater height, ensuring a clean environment.

Claims (1)

Claims An exhaust pipe comprising a gas outlet trunk from gas-filled sections of annular air shells with diaphragms at the ends and longitudinal cables fixed to the support part, characterized in that, in order to reduce material intensity and increase reliability, the trunk is equipped with at least a pair of coaxially placed and having longitudinal peHL1L .4L 7 11 A fo 16 0 five sconces of shells with thermal insulation in the gap between them, a mesh of synthetic fibers and an anti-icing coating, weathercocks installed between the sections of annular air shells, and a cigar-shaped rotatable shell with inflatable concentric elements with a nozzle and a weatherstrip placed at the top of the barrel in the form of a plate supported by a ball with a hole on the base covered with the fluoroplastic, and the longitudinal cables are connected to the top of one of the sections of the pneumatic shells of the lower part of the trunk and fixed on the supporting portion through the reeling drum. View figure 1