DE51863C - Apparatus for regulating the supply of air for firing hot water boilers - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The present invention relates to a device for the automatic adjustment of the ash drop flap of a furnace, which gives off heat to boilers which are used to heat water for heating purposes. In heating water for this purpose it is important that the fire be regulated so that the water cannot be heated to such a high temperature that the conversion of the water into steam takes place. For this reason, the torrid ^r W ater not direct the necessary self-acting to move a flap force can be reclaimed.

In order to obtain steam through the intermediary of hot water, a water containing one is used Auxiliary boiler or steam generator arranged and used for heating Surrounded by water in such a way that steam at one temperature is generated in the auxiliary boiler which is below that required to generate steam in the main boiler is required. This result can be achieved by the water in the Main boiler, which is fed from a source significantly higher up, under one considerable prints is available. The auxiliary boiler, on the other hand, is arranged in such a way that the The pressure acting on the liquid contained therein is not higher than atmospheric pressure and consequently the water of this kettle can be brought to the boil at about 100 ° C.

Such a device is shown in the accompanying drawing.

Fig. Ι shows a side view of a hot water boiler provided with the device, while Fig. 2 gives a cross section through the actual device.

In Fig. 1 a boiler A is shown, in which the dotted vertical lines indicate features, which are, however, unimportant for the present invention. The boiler A is carried by a cylinder with the furnace B , which in turn rests on a matching base frame C , which serves as an ash trap and for air supply. A flap D is attached to this part C so that it can rotate about hinges. A chimney or draft duct E is attached above the boiler, which serves to discharge the combustion products and generate the necessary draft. A pipe F opens into the boiler A, which is connected to the expansion vessel G located above the boiler, so that the weight of the water column in the pipe F keeps the water in the boiler under greater pressure than atmospheric pressure. The pipes used to distribute the water in the building are not shown. These, which are laid in any suitable way, are to be connected to the nozzle y of the kettle and to the hem of the vessel G, which must necessarily be located above these tubes.

The auxiliary boiler in which steam is to be generated consists in the present case of a closed container H, FIG. 2, which

Claims (1)

is fixed within an extension Η ^λ of the pipe 1 leading from the boiler A to a radiator. This auxiliary boiler or generator is filled with water which, because the water in the auxiliary boiler mentioned is not under pressure, has a lower boiling point than the water in the boiler. When the temperature of the water in the boiler rises above the boiling point of the liquid in the auxiliary boiler H , steam is generated in the latter. The steam generated in this way can be used in any suitable way for closing the ash trap. In the drawing, a pipe l ^l branches off from the boiler H , the free end of which is bent upward and carries the device for moving the flap. This device consists of a housing which consists of an upper half α and a lower half a ¹ , which are provided with flanges at their edge and are tightly united with one another there. In this housing a membrane rf, which consists of rubber, is accommodated in such a way that it is stretched out in the housing and held with its edges between the flanges of the halves α and a ¹ . In this way, the membrane forms a flexible partition of the housing, below which there is a vapor-tight chamber. As a result of the flexibility of the membrane, the latter bulges upwards when steam presses on it from below. On the upper surface of the membrane rests a plate e to which a rod e ^{1 is} attached. This .Stange e ¹ protrudes through the upper half of α of the housing and engages on the one arm of a double-armed lever / of which has in one approach, b of the housing half α its fulcrum. The other outer arm of the lever J is connected to the ash flap D by a chain J ¹ , FIG. The inner arm of the lever J is still loaded with a weight j which tends to keep this arm of the lever and the rod e ^{1 pressed down.} The Gesammteinrichtung is such, that the forwarded steam generated in Hülfskessel H and d through the pipe 7 ¹ under the membrane, as soon as its pressure is sufficiently great, lifts the membrane and thereby moves the inner arm of the lever J upwards and the door D Sleeping . If, as a result of the closing of the flap, the temperature of the water in the main boiler has fallen sufficiently to prevent the formation of steam in the boiler H and to bring about condensation in the pipe P , the membrane lowers and the weight j opens, in that it moves the inner arm of the Lever J down, flap D again. Although only water is present in the Hülfskessel H, it is clear, will DAF generated in the latter enough steam for the stated purpose, before the W ^r ater in the main tank can reach the temperature at which it is converted into steam, because the pressure of the water in the pipe F plus the atmospheric pressure makes a temperature of over 100 ° C. necessary to convert the water in the boiler into steam. The shape of the auxiliary boiler and the construction of the individual parts of the device may be other than those shown. Furthermore, it is not necessary to put the auxiliary boiler in the To accommodate circulation tubes, but the same can also be installed in the boiler and a piston can be used in place of the diaphragm. With the hot water heaters constructed so far, it is not advisable to bring the temperature to more than 85 or 88 ° C., because with the usual fluctuations the boiling point could be exceeded, which would result in the water being forced out of the boiler into the expansion vessel . Therefore all radiators of this temperature of 85 or 88 ° should be chosen accordingly large, and the costs caused by the size of these radiators are not inconsiderable. By applying the present invention, the W ater ⁷ läfst in the boiler resistant to a temperature of gleichmäfsigen ro2 to ι ο 5 ⁰ C. obtained with the same degree of accuracy as in a low-pressure steam system and almost as high Temperatur.- This a great saving in material and in the manufacturing price of the radiators. In cases where volatile liquids have been used, it is necessary use metallic membranes instead of rubber membranes because all of them are volatile Liquids are effective solvents of rubber or rubber. In practice it is difficult to manufacture a metallic membrane which is sufficiently sensitive and is at the same time durable, and therefore these devices have found little use. The present invention eliminates this disadvantage, since a rubber or Rubber membrane used and in this way a sensitive and safe device, treatment can be obtained, which comes into action at the right time for that of one To ensure hot water apparatus achievable highest heat. Patent claim: An apparatus for maintaining the permissible temperature in the boilers of the water heating, in which a container filled with water (H), whose water is drigerem prints as the hot water is, and thus boiling earlier, accommodated in- the circulating heating water and so connected to a closed off by a membrane (d) or a piston chamber (aa ^l) isl ~ DAF when exceeding Obergurig the permissible temperature of the heating water by By means of the latter in the container (H) developed vapor to move the membrane or the piston sufficiently to move a connected to the membrane or the piston, the air supply to the furnace regulating organ (ash trap, food slide or the like) in the Decrease the temperature of the heating water required to close. For this purpose ι sheet of drawings.