JPS61161320A - Burner - Google Patents

Abstract

PURPOSE:To make it possible to adjust combustion in a wide range by providing a metallic net in tight contact with a burner head and the metallic net with ceramic. CONSTITUTION:A burner head 1 is pierced with a plurality of flame holes 2 divided into the upper and lower stages. A metallic net 3 is attached to the periphery of the burner head 1 in tight contact. The metallic net 3 and the burner head 1 are welded to provide close attachment between them by a plurality of spot welding at the center section of the upper-stage flame holes 2a and lower-stage flame holes 2b of the burner head 1. Since the metallic net 3 and burner head 1 have flame spraying 4 with ceramic, their tightness of contact is further improved. For the ceramic spraying 4 mullite (3Al2O3.2SiO2) or spinel (MgO.Al2O3) is used. This constitution prevents lifting during strong combustion, and prevents excess heating of the net and flame holes during weak combustion, making it possible to provide a combustion device with a wide range of combustion adjustment from strong combustion to weak combustion.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a burner for combustion equipment.

2. Description of the Related Art As shown in FIG. 3, a conventional combustion apparatus of this type has a burner head 1 provided with a flame hole 2, and a wire gauze 3 provided on the inner surface of a bar rad 1. Fig. 4 shows another conventional example in which a flame hole 2 is provided in the burner head 1, and a wire mesh a is attached to the burner head 1.
It consists of being wrapped around the outer surface of.

(For example, Utility Model Application Publication No. 58-122817, Utility Model Application No. 58-122817,
9-18121) Problems to be Solved by the Invention However, in the above-mentioned inventions, it was difficult to control combustion over a wide range from low calorie to high calorie. That is, in order to achieve combustion ranging from strong combustion with a large amount of combustion to weak combustion with a small amount of combustion, the flame A will lift from the flame hole 2 side unless the jet speed of the premixed gas ejected from the flame hole 2 is suppressed during strong twist firing. For this purpose, measures have been taken to increase the opening area of the flame hole 2. However, if this opening area is made large, the ejection speed of the premixed gas will decrease during weak combustion, and the flame A will be formed on the surface of the wire mesh 30. However, the wire mesh 3 will become red hot and reach a very high temperature, resulting in thermal problems. This may result in deformation and damage. In particular, in the conventional example shown in FIG. 2, the wire mesh 3 is provided on the inner surface of the burner head 1, so the burner head 1 is heated by the flame A,
In addition to deformation and damage, there were also problems with the heat resistance of the burner head 1.

The present invention solves such conventional problems, and solves the lifting phenomenon and the heat resistance problems of wire mesh, etc., and allows combustion in a wide range from strong combustion with a large amount of combustion to weak combustion with an extremely small amount of combustion. The purpose is to provide an adjustable burner.

Means for Solving the Problems In order to solve the above problems, the combustion apparatus of the present invention includes a burner head having a plurality of flame holes, which is provided with a wire mesh in close contact with the burner head.
The burner head and wire mesh are coated with ceramic spraying.

Effects of the present invention Due to the above-mentioned development, the adhesion between the burner head and the wire mesh is improved, the heat on the surface of the wire mesh is easily conducted to the burner head, the temperature of the combustion surface is lowered, and the wire mesh is improved by ceramic spraying. By improving the heat resistance of the surface, deformation and damage of the wire mesh are eliminated, making it possible to provide a combustion device with a wide range of combustion amount adjustment.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIG. 1, a burner head 1 has a plurality of flame holes 2 divided into upper and lower parts. Reference numeral 3 denotes a wire mesh attached closely to the outer peripheral surface of the burner head 1. The wire mesh 3 and the burner head 1 are spot-welded at multiple points at the center of the upper flame hole 2& and the lower flame hole 2b of the burner head 1. 3 and the burner head 1 are in close contact with each other. Further, since the wire mesh 3 and the burner head 1 are coated with ceramic spraying 4, their adhesion is further improved. Mullite (3A2O3・2SiO2) or spine/l/ is used for ceramic spraying 4.
(MgO・AI; 2O3>power is used. 5 covers the end of the wire mesh 3 with a burner cap and closes the opening at the end of the burner head 1. 6 is an aluminum alloy into which the heater 7 is cast. This vaporizing cylinder is a die-cast molded product, and its upper end flange portion 8 covers the lower end of the wire mesh 3, and the burner head 1 is placed thereon. 9 is a gas passage narrowed down the bottom of the burner head 1, and 10 is a small hole 11. 12 is a burner fixing screw, 13 is a fuel nozzle, and 14 is a combustion air outlet.A flame A and an auxiliary flame B are formed between the carburetor flange 8 and the burner cap 5.

In the above configuration, the fuel and air ejected from the fuel nozzle B and the air discharge port 14 become a premixed gas in the heated vaporization cylinder 6, pass through the gas passage 9 and the pressure equalization plate 10, and reach the flame hole 2 of the burner head 1. A flame is formed on the surface of the wire mesh 3. During hard twist firing, the ejection speed of the premixed gas ejected from the flame hole 2 is high, and flame A is generated in the main stream of the premixed gas facing the flame hole 2.
are formed from the individual flame holes 2. In addition, since the wire mesh 3 is tightly wound around the outer peripheral surface of the flame hole 2, an auxiliary flow is generated through the mesh of the wire mesh 3 around the main stream of premixing facing the flame hole 2, and an auxiliary flame B is generated. Form. This auxiliary flame B has good flame stability because the ejection speed of the premixed gas is slow and the flame is formed on the surface of the wire mesh, so it is not blown away. In this way, during strong twist firing, a stable auxiliary flame B is formed around the flame A, and stable combustion can be obtained without lifting of the flame A. Further, during strong twist firing, the flame A is formed relatively far from the surface of the wire mesh, and the wire mesh 3 is hardly heated to red. On the other hand, during weak combustion, the ejection speed of the premixed gas becomes slower, so
As shown in FIG. 2, both flame A and auxiliary flame B burn on the surface of wire mesh 3. Therefore, during weak combustion, no lifting phenomenon occurs, but the temperature of the wire mesh 3, flame hole 2, etc. tends to rise. In this embodiment, the wire mesh 3 is attached closely to the burner head 1, and the burner head 1 and the wire mesh 3 are coated with ceramic spraying 4, so that the adhesion between the burner head 1 and the wire mesh 3 is improved. The heat on the surface of the wire mesh 3 is easily conducted to the burner head 1, and the temperature of the wire mesh 3 does not rise excessively. This is because the wire mesh 3 is wrapped around the outer peripheral surface of the burner head 1, so the burner head 1 is located on the cooling side facing the premixed gas passage inside the flame A side, and the cooling effect of the wire mesh 3 is Because you can get enough. Moreover, the heat resistance of the surface of the wire mesh 3 is significantly improved by the ceramic spraying 4. Furthermore, since the lower end of the wire mesh 3 of the burner head 1 is covered with a carburetor flange 8 made of aluminum die-casting having good thermal conductivity, deformation of the wire mesh 3 is further suppressed and high-temperature durability is improved. By spot welding the wire mesh 3 and the burner head 1 at the center of the three-stage flame hole 2a and the lower stage flame hole 2b, the adhesion effect between the wire mesh 3 and the burner head 1 is improved, and the gap between the upper and lower stages of the flame hole 2 is improved. The temperature of the wire mesh 3 is lowered and the durability is improved.

Furthermore, in this embodiment, the bottom surface of the burner head 1 is formed with an integrated constricted shape to form the gas passage 9, which makes it possible to rationalize the components, promote the cooling effect of the burner head, and lower the temperature of the wire mesh 3. Can be done.

Effects of the Invention As described above, the combustion apparatus of the present invention provides the following effects.

(1) It is possible to provide a combustion device with a wide range of combustion amount adjustment from strong combustion to weak combustion by preventing lifting during strong twist firing and preventing IT heating of the wire mesh and flame hole during weak combustion.

(For 21 burners, the heat resistance of wire mesh and wire mesh improves, and stable combustion can be obtained for a long period of time.

[Brief explanation of the drawing]

FIGS. 1 and 2 are sectional views of essential parts of a combustion apparatus according to an embodiment of the present invention, and FIGS. 3 and 4 are sectional views of essential parts of a conventional combustion apparatus, respectively. 1... Burner head, 2... Flame hole, a
...wire mesh, 4...ceramic spraying, A.
...Flame, B... Old auxiliary flame. Name of agent: Patent attorney Toshio Nakao and one other person
...He'-No to Sodo 2...Flame hole 3...Cold! Maro 4...Ceramic spraying δ...Supplementary vJ flame diagram 2

Claims (3)

[Claims] (1) A combustion device in which a wire mesh is closely attached to a burner head having a plurality of flame holes, and ceramic spraying is applied to the burner head and the wire mesh. (2) Ceramic spraying uses mullite (3Al_2O_3
・2SiO_2) or spinel (MgO・Al_2
The combustion device according to claim 1, using O_3). (3) The combustion device according to claim 1, wherein the burner head and the wire mesh are spot welded at several locations.