JP3053549B2 - Installation structure of fiber mat for surface burner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface burning burner burning on the surface of a fiber mat. In particular, it relates to a structure for attaching a fiber mat.

[0002]

2. Description of the Related Art Conventionally, as a mounting structure of a fiber mat,
FIG. 5 disclosed in JP-A-59-26207 is disclosed. The side edge of the ceramic fiber panel 51 is brought into contact with the upper surface of a sealing air filling chamber 53 surrounding a rectangular combustion mixture filling chamber 52, and the side edge is pressed by a chevron member 54. Along the inner peripheral edge of the top wall 55,
A slot 57 through which air passes is formed.

[0003] Air for sealing is supplied to the filling chamber 53, and is ejected from the fiber panel 51 through the slot 57, so that the air-fuel mixture burning on the surface of the panel 51 in contact with the air-fuel mixture filling chamber 52 is removed. Heat of the chevron 54
Etc. are reduced.

[0004]

As shown in FIG. 5, sealing air is supplied from a filling chamber 53 to a slot 57 and a panel 51.
By escaping to the outside through the surface, the heat transmitted to the chevron 54 at the side edge is reduced.

[0005] However, if there is a difference in the blowing speed between the combustion air-fuel mixture and the sealing air, one of them will win and the boundary between the combustion portion and the sealing air blowing portion will become unstable. Further, even when an impermeable layer for partitioning the air-fuel mixture for combustion and the sealing air is provided inside the panel 51, if the blowing of the sealing air is weak, heat can be prevented from entering the chevron 54 on the side edge. There are problems such as inability to do so. SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure for mounting a fiber mat of a surface combustion burner which can solve the above-mentioned problems.

[0006]

According to the present invention, there is provided a structure for mounting a fiber mat of a surface combustion burner according to the present invention,
An air chamber provided along the periphery of the fiber mat and having a plurality of openings in a plane to which the fiber mat is fixed; a flange portion for fixing the periphery of the fiber mat to an upper portion of the air chamber; Air supply means for supplying cooling air to the air chamber; the flange portion includes an intermediate flange for directly pressing the fiber mat, and a pressing flange for pressing the intermediate flange via a spacer, and Forming a flow path for cooling air between the two flanges, and forming a gap between an inner peripheral edge of the intermediate flange and an inner peripheral edge of the holding flange; The cooling air supplied to the air chamber and discharged to the flow path between the two flanges through the opening through the opening is blown out of the gap through the flow path. The one in which the features.

Further, the inner peripheral edge of the intermediate flange is
The cooling air is blown out from the gap in a direction substantially the same as the flow of the combustion exhaust gas by being bent substantially perpendicularly to the combustion surface of the fiber mat. .

[0008]

The cooling air supplied to the air chamber by the air supply means is blown out from the opening of the air chamber provided along the peripheral edge of the fiber mat, and passes through the flow path between the intermediate flange and the holding flange. By blowing out from the gap formed between the inner peripheral edges of the flanges, the inner peripheral edges of both flanges are effectively cooled in a stable state.

Further, the inner peripheral edge of the intermediate flange is bent substantially perpendicularly to the combustion surface of the fiber mat, and the cooling air is blown out of the gap in the same direction as the flow of the combustion exhaust gas. Even if there is a difference in the blowing speed between the combustion exhaust gas and the sealing air, the contour of the combustion surface can be kept clear.

[0010] The inner peripheral edge of the intermediate flange is heated on one side by the combustion gas, but the other side is cooled by the cooling air. The temperature of the portion can be suppressed to at most about 250 ° C.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of an air chamber, FIG. 3 is an explanatory diagram of an intermediate flange, and FIG. 4 is an explanatory diagram of a holding flange.

In FIG. 1, an air chamber 2 is provided on the back side of the fiber mat 3 along the periphery of the fiber mat, and has a plurality of openings 4 in a surface to which the fiber mat is fixed. (Fig. 2). A flange portion for fixing the periphery of the fiber mat 3 to the upper portion of the air chamber 2;
And an air supply means 10 for supplying air.

The flange portion includes an intermediate flange 5 for directly pressing the fiber mat 3 and a pressing flange 6 for pressing the intermediate flange through a spacer 9. The intermediate flange 5 is also provided with an opening 4 corresponding to the opening 4 of the air chamber 2 (FIG. 3).

A spacer 9 is interposed between the flanges 5 and 6, and the flange portion is fixed to the air chamber 2 by a round screw 7 inserted into a through hole 8. Thus, a flow path for cooling air is formed between the flanges 5 and 6. A gap 12 is formed between the inner peripheral edge of the intermediate flange 5 and the inner peripheral edge of the holding flange 6.

Thus, the air is supplied to the air chamber 2 by the air supply means 10, and the two flanges 5, 6
The cooling air discharged into the flow path between the two is blown out from the gap 12.

In this case, the inner peripheral edge of the intermediate flange 5 is bent substantially perpendicularly to the combustion surface of the fiber mat 1 (FIG. 3), and the inner peripheral edge of the holding flange 6 is turned upside down. The cooling air is blown out of the gap 12 in substantially the same direction as the flow of the combustion exhaust gas by being bent in the shape of a square (FIG. 4).

[0017]

The cooling air supplied to the air chamber by the air supply means is blown out from the opening of the air chamber provided along the periphery of the fiber mat, and passes through the flow passage between the intermediate flange and the holding flange. By blowing out from a gap formed between the inner peripheral edges of both flanges, the inner peripheral edges of both flanges are cooled. Thus, the periphery of the fiber mat can be effectively cooled in a stable state.

Further, the inner peripheral edge of the intermediate flange is bent substantially perpendicularly to the combustion surface of the fiber mat, and cooling air is blown out from the gap in the same direction as the flow of the combustion exhaust gas. Even if there is a difference in the blowing speed between the combustion exhaust gas and the sealing air, the cooling can be performed while keeping the contour of the combustion surface clear.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is an explanatory diagram of an air chamber.

FIG. 3 is an explanatory view of an intermediate flange.

FIG. 4 is an explanatory view of a holding flange.

FIG. 5 is an explanatory view of a conventional mounting structure of a fiber mat.

[Explanation of symbols]

2 ... air chamber, 3 ... fiber mat, 4 ... opening, 5 ... intermediate flange, 6 ... holding flange, 10 ... air supply means, 12
... gap.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideyo Tatsuta 3 Bentencho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Within NKK Total Design Co., Ltd. (72) Inventor Tamotsu Hayase 3 Bentencho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Kenzo Imagawa 3rd Benten-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture NKK Total Design Inc. (56) References JP-A-62-182510 (JP, A) JP-A-58- 225590 (JP, A) JP-A-4-335910 (JP, A) JP-A-52-144831 (JP, A) JP-A-58-181126 (JP, U) JP-A-61-98034 (JP, U) JP-A-3-121318 (JP, U) JP-A 62-93527 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F23D 14/14-14/18

Claims (2)

(57) [Claims] 1. A mounting structure for a fiber mat that forms a combustion surface of a surface combustion burner; a surface provided on a back side of the fiber mat along a peripheral edge of the fiber mat, to which the fiber mat is fixed. An air chamber having a plurality of openings therein, a flange portion for fixing a peripheral edge of the fiber mat to an upper portion of the air chamber, and air supply means for supplying cooling air to the air chamber; The flange portion includes an intermediate flange that directly presses the fiber mat, and a pressing flange that presses the intermediate flange via a spacer. The spacer forms a cooling air flow path between the two flanges and the intermediate flange. The inner peripheral edge of the
Forming a gap between the inner peripheral edge of the holding flange; and supplying the air to the air chamber by the air supply means;
Through the opening, the cooling air discharged to the flow path between the two flanges passes through the flow path, and is blown out from the gap portion. Fiber mat mounting structure. 2. The cooling air is substantially flush with the flow of combustion exhaust gas from the gap by bending an inner peripheral edge of the intermediate flange substantially perpendicularly to a combustion surface of the fiber mat. The structure for mounting a fiber mat of a surface combustion burner according to claim 1, wherein the fiber mat is blown in a direction.