RU174381U1 - DEFLECTOR - Google Patents

Abstract

The utility model relates to devices used on ventilation pipes, and can be used in natural general exchange and local ventilation systems to increase traction in ventilation pipes of public and industrial buildings. The deflector contains a ventilation pipe, upper and lower pipes, offset from each other by height 0.3-0.6 D, where D is the outer diameter of the ventilation pipe, and four partitions between the sockets, the upper edge of the upper socket is located at the level of the upper headband of the ventilation pipe. difference of the latter is the performance of the upper and lower sockets with parabolic surfaces. The sockets are fixed with smaller sections on the outer surface of the ventilation pipe, and the partitions are fixed between the sockets uniformly around the circumference in mutually perpendicular directions. The ratio of the sizes of the narrow and wide sections of the lower bell is D: 3D, the ratio of the narrow and wide sections of the upper bell is 1.5D: 3D, respectively, where D is the outer diameter of the ventilation pipe. The curvature of the parabola of the surface of the bell to the horizontal surface is set depending on the circumference of each bell according to the formula P = l (x, y), is within the range of P = (90 ÷ 135 °), where P is the curvature of the parabola, l is the circumference, respectively depending on the accepted diameter of each bell. This allows you to increase the draft in the ventilation pipe by increasing the efficiency of use of wind energy and allows you to increase the rate of air exchange in the served room.

Description

The utility model relates to devices used in ventilation pipes, and can be used in natural general exchange and local ventilation systems to increase traction in ventilation pipes of public and industrial buildings.

A deflector is known (RF patent No. 2271498, IPC F23L 17/2, published March 10, 2006), in which a cone with the top pointing down is installed on the upper section of the chimney pipe. The cone is mounted on rods, the lower ends of which are connected by a belt in the form of a metal strip with a connector. A bell is attached to the rods. When the wind from either side, air moves over the chimney between the cone and the bell and thus increases the draft in the chimney.

The disadvantage of this deflector is the lack of efficiency, because the cone creates aerodynamic resistance to the movement of gases in the chimney and the draft in the latter decreases.

A known deflector (RF patent No. 2338960, IPC F23L 17/02, published November 20, 2008), in which two bells are installed on the upper section of the chimney pipe - the upper and the lower. The sockets have conical surfaces. The upper bell is fixed above the lower bell with the help of rods. Between the sockets along their width are guide vanes, which are also fixed on the rods. The lower ends of the rods are connected by a belt covering the chimney, in the form of a metal strip with a connector. The upper bell is mounted on vertical rods at a height of (0.3 ÷ 0.6) D from the lower bell, where D is the outer diameter of the chimney, the guide vanes are located between the bell at an angle α = (5 ÷ 45 °) to the radius of the chimney pipes, the lower and upper sockets are made with narrow and wide section sizes equal to D and 1,2D, respectively, the angles of inclination of the surfaces to the horizontal plane at the lower socket β = (40 ÷ 60 °), at the upper socket γ = (5 ÷ 15 ° )

In any direction of the wind, air moves over the chimney in the space between the upper and lower chimneys and between the guide vanes and at the same time the draft in the chimney increases.

The disadvantages of this deflector, taken as a prototype, are its lack of effectiveness and design complexity.

The task of the invention is to increase the draft of the ventilation pipe by increasing the efficiency of using wind and increasing the rate of air exchange in the served room.

The essence of the claimed invention is as follows. A deflector containing a ventilation pipe, upper and lower bells, offset from each other by a height of 0.3-0.6D, where D is the outer diameter of the ventilation pipe, and four partitions between the bells, the upper edge of the upper bell is located at the level of the upper headband of the ventilation pipes, while the upper and lower sockets are made with parabolic surfaces, fixed with smaller sections on the outer surface of the ventilation pipe, and the partitions are fixed between the sockets uniformly around the circumference in a mutually perpendicular For these directions, the ratio of the dimensions of the narrow and wide sections of the lower bell is D: 3D, the ratio of the narrow and wide sections of the upper bell is 1.5D: 3D, respectively, where D is the external diameter of the ventilation pipe, the curvature of the parabolas of the surface of the bell to the horizontal surface is set depending on the circumference of each bell according to the formula P = 1 (x, y) is located within P = (90 ÷ 135 °), where P is the curvature of the parabola, 1 is the circumference, respectively dependent on the accepted diameter of each bell.

The essence of the utility model is illustrated by drawings, where

in FIG. 1 - shows a General view of the device;

in FIG. 2 - also, a top view;

in FIG. 3 is a sectional view of the device along AA;

in FIG. 4 - general view of the upper bell;

in FIG. 5 is a general view of the lower bell.

On the headband of the ventilation pipe 1 having an outer diameter D, two sockets with parabolic surfaces are attached - the lower 2 and the upper 3, made of galvanized sheet. At the same time, the upper socket 3 is attached to the headband of the ventilation pipe 1 by means of fasteners 4, and the lower socket 2 is attached to the ventilation pipe 1 (by welding or soldering), with a distance between the sockets of 0.3-0.6D.

Between the sockets 2 and 3 are installed four partitions 5 evenly around the circumference in mutually perpendicular directions, forming four sections 6.

The ratio of the sizes of the narrow and wide sections of the lower bell 2 is D: 3D, the ratio of the narrow and wide sections of the upper bell 3 is 1.5D: 3D, respectively, where D is the outer diameter of the ventilation pipe.

The bells 2 and 3 are made with parabolic surfaces having different curvature of the parabola. The curvature of the parabola of the surface of the bell 2 and 3 to the horizontal surface is set depending on the circumference of each bell according to the formula P = 1 (x, y), is within the range of P = (90 ÷ 135 °), where P is the curvature of the parabola, 1 is the length circumference, respectively dependent on the accepted diameter of each bell.

The deflector operates as follows. An external incoming air flow flowing into sections 6 separated by partitions 5 with an enlarged inlet between the bells 2 and 3 is ejected through the constrictions formed by the bells 2 and 3 in the upper part of the device. Due to the narrowing of the exit area, there is an increase in the flow rate, creating an ejection effect for the flow flowing from the ventilation pipe 1. Accordingly, the rate of discharge from the ventilation pipe increases.

The implementation of the conical surfaces of the upper 3 and lower 2 of the flares parabolic with different curvature of the parabola and the separation of the volume by the partitions between the flares leads to the fact that the output cross section of the air flow is less than the inlet. As a result, the air flow is accelerated and an ejection effect is created, as a result of which the draft in the ventilation pipe 1 is significantly increased. The location between the bells 2 and 3 evenly around the partitions 5 ensures a more complete use of wind energy and, due to this, the wind flow is further twisted, thereby increasing the effect ejection for exhaust air.

Thus, the application of the proposed device can improve the efficiency of using wind energy to enhance traction in the ventilation pipe, which provides the following advantages:

- this device can be used for civil and industrial facilities (in natural ventilation systems);

- increases the speed of the ejection torch, which in turn increases the radius of the emission of harmful gases and smoke;

- the effect of blowing the ventilation pipe is removed, which reduces the effect of the emitted gases and fumes on the ventilation pipe itself;

- the effect of blowing the ventilation pipe is removed, which eliminates the effect of “backward” traction, which often occurs in natural ventilation systems;

- increases the speed of movement of air masses in the room, as a result of which the frequency of air exchange increases, respectively, the quality of the air environment in the room increases.

Claims (2)

A deflector containing a ventilation pipe, upper and lower bells, offset from each other by a height of 0.3-0.6D, where D is the outer diameter of the ventilation pipe, and four partitions between the bells, the upper edge of the upper bell is located at the level of the upper headband of the ventilation pipes characterized in that the upper and lower sockets are made with parabolic surfaces, are fixed with smaller sections on the outer surface of the ventilation pipe, and the partitions are fixed between the sockets uniformly around the circumference in mutually perpendicular directions, the ratio of the sizes of the narrow and wide sections of the lower socket is D: 3D, respectively, the ratio the narrow and wide cross section of the upper bell is 1.5D: 3D, respectively, where D is the outer diameter of the ventilation pipe, and the curvature of the parabolas of the surface pipes to the horizontal surface is set depending on the circumference of each socket according to the formula P = l (x, y), is located within P = (90 ÷ 135 °), where P is the curvature of the parabola, l is the circumference, respectively dependent on the received the diameter of each bell.

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