DE471108C - Chimney and ventilation attachment - Google Patents

Description

Chimney and ventilation attachment chimney and ventilation attachments, in which within a horizontal, substantially cylindrical housing a frustoconical wind tunnel is provided are known. These Attachments have the disadvantage that the exerted by the attachment on the chimney Train with increasing wind strength also increases significantly, creating undesirable Influencing the rooms to be heated or ventilated. The purpose of the invention is the uniformity of what is exerted on the furnaces, etc. To be secured in any wind force. This purpose is achieved by the fact that in the fixed hollow truncated cone of the attachment in relation to this and to each other movable truncated cones are used and that, the innermost of these truncated cones is firmly connected to a rod which, on the other hand, has an outlet opening of the Wind tunnel carries the self-steering double cone, while the middle truncated cone is spring-loaded and slidable on this rod. This becomes the wind required passage cross-section automatically reduced with increasing wind strength, so that the amount of air going through the attachment and thus the pull exerted is decreased.

The subject of the invention is in the drawing in a vertical section for example shown.

On the upper end of the chimney pipe of a cap body existing b from a vertical portion and a right cylindrical housing dare c is rotatably mounted. In the horizontal parts, on the one hand, a hollow truncated cone d is firmly inserted, the inner, narrower outer end of which extends into the housing c.

On the other side, a housing extension e surrounds the housing c. The inner end of this extension is provided with a neck piece /. The appendix is slidably supported on the housing c by rollersg; about its mobility To enable this, the wind vane of the attachment is provided with slots at the top and bottom.

. In the axis of the housing c, a horizontal slide rod i is slidably mounted, the front end of which is carried by an arm h. There is a rod at the rear end! slidable in a bearing m attached to the flag l and provided with an eye rz. which it is firmly connected to the extension e. On the pole l; a double-cone-shaped body o is attached, the position of which can be adjusted by means of the adjusting screw p. Furthermore, a hollow truncated cone g is movably arranged on the rod i by means of the bearing sleeve r and can more or less slide into the wind tunnel d. Another smaller hollow truncated cone s is attached to the rod i by means of the webs t and can thus more or less slide into the cone g. A coil spring u between a hub v of the housing d and the sleeve r and a second spring zv between the bearing piece m of the wind vane l..und the double cone o hold the truncated cone g and the rod i and the parts sitting on it under spring load.

The facility works in the following way: When the wind is light, they are the truncated cones g and s with respect to each other and = with respect to the truncated cone d how. the figure shows, placed so that the wind inlet .the largest possible Has cross section. The wind entering the cones s, g, d, gradually increases its speed up to the exit point and creates a suction there on the wind in the intermediate cone g; the wind emerging from this generates in turn a suction effect on the wind flowing through the cone. This latter works sucking on the chimney pipe rr, which creates an upward draft, which, despite the changing wind strength, is kept essentially at a constant height will.

Because as soon as a stronger wind occurs, the truncated cone s at simultaneous displacement of the rod i and compression of the spring w in the Truncated cone g is inserted and the annular space between s and g is reduced. At still stronger a wind also becomes g in, - d under compression of the somewhat stronger winds. Fedora inserted so that, with the same cross-section of the cone, the two other for passage: the wind determined annular spaces between s- and g and g and d be throttled more and more. So there is less wind through it, and his This balances out strength. For the draft in the chimney a plays also the opening width of the cone d has a certain role. than the smaller this one The opening. is, the greater the speed that comes from it. outgoing vVind. When the wind is weak, this opening is due to the double cone protruding into it o smallest, and the wind exiting under relaxation has a certain one Speed. If the wind gets stronger, the body shifts o to the right, this increases the outlet cross-section of the cone d and the exit velocity the wind is reduced accordingly, i.e. H. it remains approximately on the same Height as in light wind.

Simultaneously with the movement of the bar! When the wind rises, the housing extension e moves out of the housing c, whereby an expansion chamber adapted to the greater wind force, ie an extended expansion chamber, is formed and the wind emerging from the cone d can strike the walls / . When the wind drops, the spring w brings the rod! back to their original position and thus also the parts g, s and @z.

Claims (2)

PATENT CLAIMS: i. Chimney and ventilation attachment, in which a truncated cone within a horizontal, substantially cylindrical housing running wind tunnel is provided, characterized by hollow, in the wind direction tapered truncated cones (s, g); which are inserted into the hollow truncated cone (d) are and in relation to the latter and are displaceable on each other. 2. chimney -and - ventilation attachment according to claim i, in which the outlet opening of the wind tunnel self-steering, mounted on a longitudinally displaceable spring-loaded rod Double cone is provided, characterized in that. that the innermost truncated cone (s) with the rod (i) carrying the double cone (o). firmly connected and the between The truncated cone (g) lying on the truncated cone (s) and the truncated cone (d) are spring-loaded and is displaceable on the rod (i).