DE70077C - Control device for equalizing the pressure between the steam boiler and the radiators of low-pressure steam heating systems - Google Patents

Description

IMPERIAL

PATENT OFFICE.

CLASS 36: heating systems.

of low pressure steam heating.

The main novelty of the present invention is that it is used to control the Differences in pressure in the case of low-pressure heating between the steam tension in the steam generator and the use of any radiators and maintaining an even tension movable parts exposed to wear, such as float valves and the like, is excluded and that the device not only works completely automatically, but that also the closures between the heat generators and heat emitters in question are secure as liquid closures act and not from mechanical imperfections, wear and tear or attachments Precipitation, incrustations and the like can be influenced.

The drawings represent the facility schematically, without going into details, which are known per se and differ depending on local conditions.

A is the steam generator, BB ¹ are radiators, C is the steam pipe leading from the boiler to the radiators with branches c and c ¹ , while DD ^{1 are} shut-off valves for each heating element; E is the return pipe for the condensation water after the steam development with the secondary lines ee ¹ .

F is an air tank belonging to the control vessel G , both of which are connected between the steam generator and the condensation line; the air tank F., which is otherwise not bound to a specific local position, is connected to the water space of the steam boiler through the pipe E ^1. The regulating vessel is connected to the steam chamber of the boiler by a pipe H , while G and F are again connected to one another by a pipe H ¹ .

The Regelungsgefäfs G consists of two divisions of G ⁰ and G ^u which g by two tubes and g ^{1 are} connected to each other, namely g communicates with the upper halves of both Gefäfse in connection while g ^l from the bottom of the upper of the lower part lower vessel leads.

The fluctuations in the pressure conditions between the steam boiler and the radiators are determined by the height h of a water column between the levels of the liquids (any liquid, especially those with a low evaporation capacity, is suitable for this) in the two containers G ⁰ and G "of the regulating vessel G. This water column is equal to the water column h ^l between the water level in the boiler and that in the condensation water discharge pipe J? ¹ .

Since h can be chosen as high as you like, you can also set any maximum permissible difference between the voltages in the boiler and the radiators.

The device works as follows:

Let us assume that steam is developed in A , then by opening the shut-off valves DD ¹ ... steam from C ^c C ^cl into BB ¹ , which

be heated. The resulting condensation water and the air displaced by the steam pass through e respectively. e 'to E and into the vessel F. The condensation water returns to the boiler through E ^1. At the same time, steam has also passed from A through H to G ″ , here the liquid has pushed through g ¹ to G ⁰ , corresponding to the intended height h. If a pressure reduction now takes place in B and B ¹ , the water column h 'in E rises ', but at the same time the liquid from G ^u , with the same column height h, is driven to G ⁰ and the buoyancy of the contents from G ¹ ' to G ⁰ releases g below, the vapor from A passes from H through g to H ¹ and F until the liquid column h between G ⁰ and G ″ sinks again and the closure at g. restores. The desired pressure difference between A and B is thus achieved again, which is therefore constantly the same /; is obtained, the vapor tension in A may increase or the pressure in the radiators may decrease as a result of cooling.

A failure or inadequate operation of the device is excluded because there are no parts which are exposed to or through significant wear and tear The effectiveness of precipitation could be impaired.

In Fig. 2 an embodiment of the invention is shown in which, instead of only one common air vessel for all heating elements, each of the latter receives its special air vessel. The arrangement is completely the same as that shown in FIG. the corresponding parts have been designated by the same letters with the addition of an _x . As before, A _{x is} the steam boiler, B _x B ' _x B ² _X are the heating elements, C _{x is} the steam supply pipe with branches C _x c' _x c ² _x . . . E _x is the return pipe for condensation water.

But instead of only one common air vessel between the condensation tube and the steam boiler BEZW for all heating elements. To switch on the control vessel G _x , a special air vessel F _x F ¹ X F ' ² _X ... is arranged for each heating element, each of which has its own special connection ee'e ² with the heating element on the one hand and e _x e ¹ _x e ~ _x . .. has E _x with the condenser tube. The latter is connected to the bottom of the water chamber of the steam boiler through the pipe E ^l _x and to the top of the steam chamber of the boiler indirectly through the interposition of the regulating vessel G _x and the connecting tubes H _x and Η ¹ * . The regulating vessel is exactly as before; It consists of the upper vessel G ° _x and the lower G " _x , which are connected to one another by the pipes g _x and g \ and in which the liquid surfaces contained in them are differentiated in their elevations by h.

When a pressure reduction occurs in BB ^l _x or B ' ² _X ", the water column h ^x rises in E ^l _x ; at the same time, with the same height of h _x , the liquid is driven from G" _x to G ° _x , up to g _x becomes free at the bottom, then: steam passes from A _x through H _x G ^u _x g _x to G ° _x and H ^l _x to E _x and into F _x or F ^l _x or F ² _X ü. sw until the liquid in G ° _x sinks back down to G " _x and causes the closure at the foot of g _x again, whereby the normal state is restored.

Claims (2)

Patent Claims: ι. A control device for low-pressure steam heating, characterized by a vessel (F) connected between the water space in the steam boiler and the condensation water line and a double vessel (G) inserted between this and the steam space in the steam boiler, the container (G ° and G ") of which is connected by pipes (g and g ¹ ) are connected to one another in such a way that the pressure difference cannot exceed a certain water column h , regardless of whether the pressure in the vessel increases or a vacuum enters the vessel F , and that if there is a greater pressure difference between the vessel and the vessel F, there is a direct connection is established by the vessel G, while this connection is automatically canceled again after the equalization has taken place. 2. An embodiment of the "in claim i. Designated control device, in which instead of the common for several heating elements vessel F a special air vessel (F _x F ^l _x F- _x ...) Is arranged for each heating element, which vessels through the Condensation water pipe (E _x Ε ¹ * -) at the bottom with the water space, at the top through a branch (H ^l _x J, the regulating vessel (G _x ) and the pipe (H ^ _x ) with the steam space of the steam boiler in connection. For this purpose ι sheet of drawings.