JPH0245617Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a multi-flame hole type burner that is applied to various uses. Specifically, the invention relates to a multi-flame hole type burner that is applied to various uses. A fuel gas distribution chamber and a combustion oxygen-containing gas distribution chamber are formed cornerwise in the burner case by the nozzles, and the fuel gas distribution chamber and the combustion oxygen-containing gas distribution chamber are formed in each of the nozzles. The present invention relates to a nozzle fixing structure for a multi-flame burner in which a mixing portion is formed which communicates with the flame holes and is connected to the flame holes.

[Prior art] The above-mentioned multi-flame hole type burner was developed in 1986-135329.
The nozzle fixing structure was previously proposed in the Nozzle Case, but the nozzle assembly and the individual nozzles were fixed by tightening the nozzle assembly housed in the burner case from its outer periphery.

[Problem that the invention attempts to solve]

However, when tightening from the outer periphery, there is a problem in that the nozzle located in the center of the burner case tends to come off, and there is still room for improvement in terms of assembly strength.

An object of the present invention is to make it possible to securely fix nozzles by making rational improvements suitable for a structure in which a large number of nozzles are arranged side by side.

[Means for solving problems]

The characteristic structure of the nozzle fixing structure of the multi-flame burner according to the present invention is that a number of nozzles are arranged side by side and housed in a burner case, and a recess is formed on the outer periphery of each nozzle. The reason is that a filling chamber for the nozzle fixing material is formed between the two, and its functions and effects are as follows.

[Effect]

In other words, the filling chamber formed between adjacent nozzles is filled with the nozzle fixed object by the cooperation of the recesses, and the filling nozzle fixed object is fixed across the adjacent nozzles, so that the adjacent nozzles are moved relative to each other in the exit direction. By restricting movement, individual nozzles are prevented from slipping out.

[Effect of idea]

As a result, the nozzles that are arranged next to each other and housed in the burner case can be firmly fixed, and the assembly strength of the nozzles can be greatly improved, which in turn can improve the durability of the burner.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

As shown in Figs. 1 to 4, a hexagonal columnar ceramic nozzle N having a flame hole 1 on one end surface.
A large number of fuel gas distribution chambers are assembled into the burner case 2 in a grouped state adjacent to each other and are fitted inside the burner case 2, and each of the fuel gas distribution chambers communicates with a fuel gas supply path 3 and a combustion oxygen-containing gas supply path 4 connected to the burner case 2. 5 and the combustion oxygen-containing gas distribution chamber 6 are each formed into sections in the burner case 2 by a plurality of nozzles N, and
Fuel gas and oxygen-containing gas for combustion are supplied from both distribution chambers 5 and 6 to each nozzle N, thereby configuring a burner suitable for radiant heating by combustion in multiple flame holes 1. be.

Each nozzle N includes an air-fuel mixture section 7 that communicates with the fuel gas distribution chamber 5 and the combustion oxygen-containing gas distribution chamber 6;
In addition, the combustion part 8 connected to the flame hole 1 is aligned with the nozzle axis P.
The upper part is formed concentrically with the combustion part 8 and the mixing part 7.
A flame-holding stepped portion 9 having a diameter larger than that of the flame-holding step 9 is formed.

In addition, a jet hole 10 that communicates between the mixing part 7 and the oxygen-containing gas distribution chamber 6 for combustion is arranged concentrically with the nozzle axis P and opened at the other end surface of the nozzle N. Two small holes 11 that communicate between the part 7 and the fuel gas distribution chamber 5 have one end opened to the inner circumferential surface of the nozzle N, and the other end opened to the ejection hole 10.
The opening is perpendicular to the opening.

In other words, fuel gas is jetted and supplied from the fine holes 11 to the combustion oxygen-containing gas which is jetted and supplied to the mixing part 7 through the jetting hole 10, and the fuel gas and the combustion oxygen-containing gas are mixed through the jetting hole 10. The mixture is sufficiently mixed in the large-diameter mixing section 7, and the air-fuel mixture is then injected from the mixing section 7 to the combustion section 8, where it is combusted.

Additionally, as the air-fuel mixture is jetted from the mixing section 7 to the combustion section 8, a vortex is generated in the flame stabilizing step section 9, and the action of the vortex stabilizes the flame (suppresses flame list and lengthens the flame). We are trying to achieve this.

Between the flame stabilizing step part 9 and the mixing part 7, a mixture diffusion member 12 having a conical guide 12a whose tip faces toward the mixing part 7 is arranged concentrically with the nozzle axis P. , due to the action of the conical guide 12a,
The air-fuel mixture from the mixing part 7 is directed toward the inner peripheral surface of the combustion part 8 over the entire circumference of the combustion part 8, and is ejected to the combustion part 8 in a state where it is diffused.

In other words, by changing and diffusing the air-fuel mixture jet direction as described above, the generation of the vortex generated in the flame stabilizing stepped portion 9 is promoted, and the strength of the vortex is increased, thereby improving the flame stabilizing effect due to the action of the vortex. By increasing the height, the combustion state in one group of flame holes (burner combustion state) is effectively brought close to the surface combustion state suitable for radiant heating.

In addition, by changing the direction of the air-fuel mixture jetting and diffusing the air-fuel mixture described above, the air-fuel mixture jetted into the combustion section 8 (already in a combustion state) is blown over the entire circumference of the inner circumferential surface of the combustion section. By spraying, flame hole 1
The inner circumferential surface of the combustion section 8 facing the combustion chamber 8 is effectively heated to a red-hot state, thereby further enhancing the heat radiation effect together with the surface combustion of the combustion state described above.

The mixture diffusion member 12 is made of ceramics, and is fired in the assembled state at the same time as the ceramic nozzle N is fired.

Further, the air-fuel mixture diffusion member 12 has a conical guide 12
It is assembled to the nozzle N in such a manner that the arm portion 12b, which is radially connected to the arm portion 12b, is engaged with an assembly step portion 13 formed within the nozzle N.

As a fixing structure for the multiple nozzles N housed in the burner case 2, a six-piece ceramic plate-like body 14 is used.
are arranged in a hexagonal shape, and a large number of nozzle groups N are accommodated in the space surrounded by the plate-like bodies 14, and by tightening each of the plate-like bodies 14 with a metal burner case 2, a large number of nozzles N groups are stored. It is fixed by tightening it from its outer periphery.

Reference numeral 15 in the figure indicates a communication hole formed in the plate-like body 14 for communication between the fuel gas supply path 3 and the fuel gas distribution chamber 5.

Further, in each nozzle N, a recess 16 is formed on the outer circumferential surface of the end opposite to the flame hole over the entire circumference,
When a large number of nozzles N are placed in a grouped state, the concave portions 16
A filling chamber 17 of the nozzle fixing material is formed between adjacent nozzles N by cooperation of the
By filling the filling chamber 17 with the nozzle fixing material A such as resin adhesive, the adjacent nozzles N
The fixing action of the filling nozzle fixture A over the length of the filling nozzle prevents individual nozzles from coming off.

The recess 16 is formed in such a shape that the filling chamber 17 becomes wider toward the back when viewed from the side opposite to the flame hole of the nozzle N, and the filling chamber 17 opens toward the side opposite to the flame hole of the nozzle N. By having a shape that locks the filling nozzle solid A to the recess 16, the nozzle N is more firmly prevented from slipping out, and the filling chamber 17 is opened on the side opposite to the flame hole of the nozzle N. This makes it possible to easily and sufficiently fill the nozzle fixture A.

In addition, the filling nozzle fixed object A is attached to the adjacent nozzle N.
It also functions as a sealant between the combustion oxygen-containing gas distribution chamber 6 and the fuel gas distribution chamber 5 due to its sealing function.

The combustion oxygen-containing gas distribution chamber 6 is equipped with a ceramic honeycomb body 18 as shown in FIG. 5 for evenly distributing the combustion oxygen-containing gas to each nozzle N. In 18, the surface on the contact side with the bottom surface of the burner case 2 is
The wavy surface is formed so that the combustion oxygen-containing gas supplied from the combustion oxygen-containing gas supply path 4 spreads smoothly over the entire area of the distribution chamber 6.

[Another example]

Next, another embodiment of the present invention will be described.

A recess 16 forming a filling chamber 17 for the nozzle fixture
It is desirable to form the nozzle at the end of the nozzle N on the side opposite to the flame hole from the viewpoint of suppressing thermal deterioration of the filling nozzle fixed object A. However, as shown in FIG. Formed on the outer periphery of N,
An injection port 19 for filling the nozzle fixing material into a filling chamber 17 defined in the burner case 2 by the recess 16 may be appropriately formed in the burner case 2 or the like.

Various improvements can be made to the specific shape of the recess 16.

As the nozzle fixing material A to be filled in the filling chamber 17, various materials can be used, such as a solidifying material such as an adhesive or a sticky material such as putty.

The specific structure inside the nozzle N and the specific structure of the burner case 2 can be improved in various ways.

Various types of fuel gas can be used, such as city gas, propane gas, and natural gas. Furthermore, various oxygen-containing gases such as air and oxygen-enriched air can be used as the oxygen-containing gas for combustion.

The specific use and installation direction of the multi-flame burner according to the present invention are not limited.

[Brief explanation of the drawing]

1 to 5 show embodiments of the present invention,
Figure 1 is a vertical cross-sectional view, Figure 2 is a - in Figure 1.
3 is a sectional view taken along the line -- in FIG. 1, FIG. 4 is a front view, and FIG. 5 is a perspective view of the honeycomb-shaped body. FIG. 6 is a longitudinal sectional view showing another embodiment of the present invention. 1... Flame hole, 2... Burner case, 5... Fuel gas distribution chamber, 6... Oxygen-containing gas distribution chamber for combustion,
7... Mixing part, 16... Concave part, 17... Filling chamber,
A... Nozzle fixed object, N... Nozzle.

Claims (1)

[Scope of utility model registration request] A large number of nozzles N having flame holes 1 are arranged adjacent to each other and housed in a burner case 2, and a fuel gas distribution chamber 5 and a combustion oxygen-containing gas distribution chamber 6 are provided in the burner case.
a mixing section 7 which is defined by the nozzle N, and which communicates with the fuel gas distribution chamber 5 and the combustion oxygen-containing gas distribution chamber 6, and which is continuous with the flame hole 1; In the multi-flame hole type burner in which a recess 16 is formed on the outer periphery of each of the nozzles N,
A nozzle fixing structure for a multi-flame burner, in which a filling chamber 17 for a nozzle fixture A is formed between adjacent nozzles N by the cooperation of the recesses 16.