JPH0512574Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a burner used in, for example, a boiler.

[Conventional technology]

FIG. 2 is a cross-sectional view of a conventional burner. In the figure, 3 is a burner, and 2 is a burner slide cylinder that holds the burner 3. The number of burners 3 is controlled by igniting or extinguishing them according to the load fluctuations of the boiler, but in order to prevent burnout of burner chips (not shown) due to radiant heat in the furnace a, cooling air is constantly supplied from the cooling air supply pipe 4 into the jacket pipe 8. At the same time, the extinguished burner 3 is pulled out and kept away from the furnace a, stored in the wind box b, and inserted into the furnace a just before ignition to relight it. The burner 3 insertion/extraction device is composed of a fixed hardware 7 on which the burner 3 is mounted, a burner extraction/extraction cylinder 2 which is directly connected to the guide pipe 5, and a jacket pipe 8.The burner extraction/extraction cylinder 2 holds the guide pipe 5. Therefore, it needs to be fixed, and the front plate 1 of wind box b is directly attached to the steel frame.

[Problem that the invention attempts to solve]

In the conventional burner as described above, the high heat from inside the furnace a is transmitted through the front plate 1 of the wind box b and heats the burner slide cylinder 2, so the piston installed inside the burner slide cylinder 2 There are problems such as the packing becoming thermally embrittled and causing stake failure.

[Means for solving problems]

The purpose of the burner according to the present invention is to solve the above-mentioned problems, and the burner is inserted into and removed from the furnace by means of a burner insertion/extraction cylinder provided outside the wind box of the furnace. It is characterized by a structure in which an air chamber is provided between the burner slider and the cylinder, into which cooling air is guided and flows into the burner cooling jacket.

[Function] That is, in the burner according to the present invention, an air chamber is created between the furnace air box and the burner removal cylinder in the burner that is inserted into and removed from the furnace by the burner removal cylinder provided on the outside of the furnace air box. The cooling air guided inside the burner cooling jacket is made to flow through the air chamber provided between the wind box of the furnace and the burner slide cylinder. By pouring it into the interior, it is possible to cool both the burner and the burner slide cylinder.

[Example] An example of the present invention will be described based on FIG. Note that the same members as in FIG. 2 are given the same reference numerals as in FIG. 2, and their explanations are omitted. FIG. 1 is a sectional view of a burner according to an embodiment of the present invention. An air chamber 6 is provided that conducts through the jacket 8, so that the cooling air that was conventionally sent directly to the cooling jacket 8 is routed through the cooling air supply pipe 4.
The air is guided from the air through the air chamber 6 into the cooling jacket 8 to flow therein.
The cooling air that has entered the cooling jacket 8 flows through the gap between the cooling jacket 8 and the guide pipe 5 and is discharged into the furnace a. Thereby, both the burner 3 and the burner displacement cylinder 2 can be cooled, and thermal embrittlement of the piston packing 9 etc. installed in the burner displacement cylinder 2 is prevented.

[Effect of idea]

The burner according to the present invention is constructed as described above, and since the burner slide cylinder is constantly cooled by cooling air, the piston packing installed in the burner slide cylinder does not become thermally embrittled and is safe. Effects such as being protected by

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a burner according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional burner. 2... Burner slide cylinder, 4... Cooling air supply pipe, 6... Air chamber, b... Wind box.

Claims (1)

[Scope of utility model registration request] In a burner that is inserted into and removed from the furnace by a burner slide cylinder provided outside the wind box of the furnace, cooling air is guided inside between the wind box of the furnace and the burner slide cylinder to form a burner cooling jacket. A burner characterized by having an air chamber that allows air to flow through the air.