DE258757C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- M 258757 CLASS 24 /. GROUP

HEINRICH LANZ company in MANNHEIM.

In the case of steam power plants with steam generators connected to a common chimney As is well known, when one of the steam generators is switched off, the smoke duct leading to the chimney is also pushed through a slide locked. Since such a slide can never close tightly, partly because of its crude execution, partly because of uncontrollable accumulations of ash under him, so is caused by the train

ίο the chimney always cold air through the boiler sucked, but this is associated with significant heat losses. Moreover arise This cold draft easily cracked the boiler walls, which in turn gave rise to it pipe leaks and leaks.

The invention seeks to remedy this deficiency in that in the smoke channel between the chimney and boiler in front of the smoke damper there is a duct opening into the outside air is arranged by a depending on the respective position of the smoke damper terminating element is closed when the smoke damper is open and open when the smoke damper is closed. This ensures that when switched off Boiler the air sucked out between the joints of the smoke valve is not only indirectly through the boiler, but can enter directly through the aforementioned channel.

Fig. Ι shows an embodiment of the invention in section, while FIG and Fig. 3 shows other embodiments of the terminator.

The steam boiler A is connected to the chimney C through the smoke duct B. In the smoke channel B , the smoke slide D is arranged, which the steam boiler A. from the chimney when the boiler is out of order. In front of the smoke slide D in the smoke channel there is a channel K , 40 'which connects the smoke channel B with the outside air. This channel K is closed by a shut-off element E, namely, between the smoke slider D and the obturator E a dependency in the sense provided that when the end of the closing movement of the flue slider D, the member E opens the channel K, at the beginning of the opening movement, however, closes again immediately.

In the embodiment according to FIG. 1, the closing element E is designed as a valve bell which is inserted into a channel filled with sand. The dependency of the movement between the gate valve D and the end member E is produced here by a chain hoist, the length of which is adjusted so that when the smoke valve is closed, no draft occurs in the combustion chamber.

FIG. 2 shows another embodiment in which the air duct is formed by a tube G which is provided with slots g _{x at the top.} In tube G, a weight H which the pipe G terminates at open spool D below, but is closed slide over the openings D ^ ₁ and consequently the channel b connects with the outer air moves.

According to Fig. 3, the device is made so that a stop U _{1 is} attached to the smoke slide D itself, which when down

go of the slider to a flap that is under weight load / in the sense of opening acts.

Claims (1)

. Patent Claims: i. Steam power plant with steam generators connected to a common chimney, characterized in that a channel (K) opening into the outside air is arranged between the chimney and each steam generator in the ίο smoke channel in front of the smoke slide, which channel (K) opens through a closing element depending on the position of the smoke slide when the smoke slide is open is closed and open when the smoke damper is closed. . 2. Steam power plant according to claim 1, characterized in that the auxiliary channel is designed as a tube (G) provided with outlet slots (g), in which the counterweight for the smoke slide moves. 3.! Steam power plant according to claim 1, characterized in that a flap (J) under the action of a weight is arranged in the channel (K) , which is brought into the open position by a stop (d _x ) when the smoke slide (D) goes down will. 1 sheet of drawings.