RU2271498C2 - Deflector - Google Patents

Abstract

FIELD: combustion.

SUBSTANCE: deflector comprises a cover made of a hollow cone or pyramid over the chimney and secured to the vertical rods above the chimney of diameter D. The top of the hollow cone or pyramid points downward and is mounted at a height of h > 0.65D above the chimney. The top exit of the chimney is provided with the funnel which is secured to the rods. The top edges of the narrow section of the funnel are in a contact with the top edges of the chimney.

EFFECT: enhanced efficiency.

4 dwg

Description

The proposed deflector relates to devices used primarily on chimneys to use wind speed and increase traction at various thermal objects.

Known deflector in accordance with the patent of the Russian Federation No. 2029910, class. F 23 L 17/02, publ. in 1995 It uses wind speed to enhance traction. However, it is so complex and bulky that it does not deserve detailed attention.

The same can be said about US patent No. 4387629, cl. F 23 L 17/02, publ. in 1983 bull. No. 6.

Known invention No.2008564, class 5 F 23 J 11/00, publ. in 1994, bull. No. 4, designed using an appropriate device to protect the roof from rain. The device contains an element in the form of a cone with an apex pointing up, located above the chimney and formally resembling a deflector. However, in essence, this cone cannot be considered a deflector, since it does not in any way increase draft in the chimney, since it increases wind resistance in comparison with the version without it.

Known deflector (see patent GB 1438499, publ. 06/09/1976, CL F 28 F 19/00). It contains a ceiling in the form of a cone, the top of which is directed downward. The cone rests on vertical rods welded to the inner wall of the chimney pipe.

The disadvantages of this deflector: 1) is not effective enough, since the narrowing of the air flow from the wind is due only to the cone, 2) the height of the chimney cone is not indicated, which is very important, since at an unacceptably low height the cone creates aerodynamic resistance to the movement of gases in the chimney and draft in the latter it decreases, 3) the vertical rods welded to the inner wall of the pipe also negatively affect the draft in the chimney, being an additional aerodynamic drag, 4) the overlap is inseparable from t rubies; rods cannot be welded to a brick chimney.

The objective of the invention is to increase the efficiency of using wind speed to enhance traction in the chimney with the simplest design of the deflector.

The problem is solved in that a hollow cone or hollow pyramid is mounted above a chimney of internal diameter D at a height h≥0.65D, and in the immediate vicinity of the upper edges of the chimney pipe, a bell is attached, the narrow section of which is in contact with the upper external edges of the chimney pipe; while the rods on which the cone and the bell are attached are connected at the bottom by a belt with a connector.

“A deflector containing an overlap in the form of a cone or pyramid mounted on vertical rods above the chimney of inner diameter D, characterized in that the cone (or pyramid) is located above the chimney at a height of h≥0.65D, and at the upper edges of the chimney a pipe is attached to the rods with a bell, the upper edges of a narrow section of which are in contact with the upper external edges of the chimney pipe; while the rods below are connected by a belt in the form of metal strips with a connector. ”

Figure 1 presents a General view of the device, a side view, figure 2 is the same in plan, figure 3 and figure 4 are respectively sections aa and bb in figure 1.

On the upper section of the chimney pipe 1, a device is mounted in the form of a cone 2 with the top pointing down. The cone is fixed to the rods 4, which pass through the bell 3. The upper edges of the narrow section of the latter are in contact with the upper external edges of the chimney pipe. The lower ends of the rods are connected by a belt in the form of metal strips with a connector.

The deflector operates as follows.

When the wind from either side, air moves over the chimney 1 between the cone 2 and the socket 3, mounted on the rods 4 and connected at the bottom with a connector 5. At the same time, in the middle zone the air speed increases not only due to the cone, but also to the socket, which causes a decrease pressure in this zone, and therefore, draft in the chimney increases.

It should be borne in mind that the resistance to the movement of the flow in the chimney from its meeting with a cone (or pyramid) does not change at h≥0.65D (see. "Reference on hydraulic resistance", author Idelchik I.E., 1975 M. ., "Mechanical Engineering", p. 412).

Connector 6 facilitates installation of the device on the chimney.

The use of the proposed deflector will increase the draft in chimneys, both in industry and in agriculture, which is of great importance for more efficient operation of various thermal objects (fuel burns better, the chimneys are lower in height, the harmful effects dissipate further).

Claims (1)

A deflector containing an overlap in the form of a cone or pyramid mounted on vertical rods above the chimney of inner diameter D, characterized in that the cone (or pyramid) is located above the chimney at a height of h≥0.65D, and at the upper edges of the chimney a bell is attached to the rods, the upper edges of a narrow section of which are in contact with the upper external edges of the chimney, while the rods at the bottom are connected by a belt in the form of metal strips with a connector.

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