JP2578387B2 - Burner for liquid fuel combustion and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion device.

[0002]

2. Description of the Related Art FIG. 5 is an exploded view of a burner for burning liquid fuel. In the figure, 1 is a vaporizer for heating and vaporizing a liquid fuel, 2 is a tubular throat on the upper part of the vaporizer 1 and 3 is a vaporizer 1
4 is a burner head portion disposed above the vaporizer 1 so as to surround the throat 2, 5 is a flame holding ring around a lower portion of the burner head portion 4, and 6 is a portion near the burner head portion 4. Spark plug as ignition source to be provided, 7
Is a screw for fixing the burner head 4 to the vaporizer 1.

FIG. 6 is a perspective view of a conventional burner head 4 viewed from the rear side. 8 is a burner head, 8a
Is a flame hole provided around the burner head 8, 8b is a flange of the burner head 8, 8c is a projection for positioning when the burner head 8 is mounted on the vaporizer, and 8d is a notch for tightening the screw 7. 9 is a wire mesh woven from metal wire that intersects obliquely (also referred to as a mesh), to cover a portion fire hole 8a is provided, is attached by spot welding to the burner head 8 (11 Is a spot welded portion, which is horizontally spot-welded between the flame holes 8a. 9c is a notch for positioning with the burner head 8, and 9a is a spot weld between the wire nets 9.

FIG. 7 is a perspective view of the wire mesh 9, which is formed by welding spot welding portions 9a at both ends to each other.
9b is a right angle notch provided on the wire netting 9 for positioning with the burner head 8.

Next, the operation of the burner will be described. The liquid fuel is vaporized in the vaporizer 1, and the vaporized gas is injected into the throat 2 together with the air to form a mixed gas . The fuel is ejected and ignited by the ignition plug 6 to perform combustion. At this time, the flame holding ring 5 acts to adjust the shape of the flame and keep the temperature of the vaporizer 1 constant, and the wire mesh 9 acts to blow the flame out of the burner head 8 as appropriate. I have.

Therefore, if the wire mesh 9 is not at a predetermined position of the burner head 8, the spot welding portion 9a overlaps with the flame hole 8a, which adversely affects the way of the mixed gas.
For this reason, conventionally, a notch 9b having a right angle is provided in the wire mesh 9 so that the notch 9c is formed when the wire mesh 9 is formed in an annular shape, and when the wire mesh 9 is welded to the burner head 8, the notch 9c is formed.
The welding machine, the burner head 8 and the wire mesh 9
It was intended to come to a predetermined position.

[0007]

However, wire mesh 9
Uses a metal wire arranged diagonally from two directions and woven so as to intersect with each other so as to be more effective against changes in the heat cycle. Therefore, when the four corners of the wire netting 9 are cut out at right angles as shown in FIG. 8 (notches are shown by broken lines in the drawing),
The metal wires 9d and 9e in the vicinity of the notch are detached from the wire net 9 because their holding force is weakened. In this case, not only the positioning cannot be performed well, but also the detached metal wire may become entangled with the welding machine, causing a failure of the welding machine.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a positioning notch for a metal wire to prevent a metal wire from coming off is provided. Moreover, positioning with a burner head can be reliably performed at the time of welding. An object of the present invention is to improve the quality and productivity of a burner for liquid fuel combustion without causing inconvenience.

[0009]

According to a first aspect of the present invention, there is provided a burner for liquid fuel combustion, wherein a wire net is formed around a burner head having a plurality of flame holes by braiding metal wires obliquely crossing each other. In the burner for liquid fuel combustion according to the present invention, an annular wire mesh having a cutout formed by a cutout along the direction of the metal wire at the joint portion is attached to the burner head as the wire mesh.

A method of manufacturing a burner for liquid fuel combustion according to a second aspect of the present invention is a method of manufacturing a fuel burner in which a wire net formed by crossing oblique metal wires with each other is wrapped around a burner head having a plurality of flame holes. In the method for manufacturing a burner, a notch cut along the direction of the metal wire is provided at the four corners of the wire mesh, and the wire mesh is welded to form a notch portion between the notches at the four corners to form an annular wire mesh. The annular wire mesh is press-fitted into the burner head, positioned in the burner head using the notch, and the annular wire mesh and the burner head are welded.

[0011]

According to the present invention, since the four corners of the wire net are cut out along the direction of the metal wire, the cut is easy, and the metal wire near the notch is held by another plurality of intersecting metal wires. Keep state. Further, the notch formed by this notch has a notch end formed firmly, so that the notch can be reliably positioned with respect to the burner head.

[0012]

1 is a perspective view of a burner head of a burner according to the present invention as viewed from the rear side. 5 denote the same or corresponding parts, and a description thereof will be omitted. 10 is a metal wire arranged diagonally from two directions and intersected (usually orthogonal)
Is attached to the burner head 8 by spot welding (each point of 11 indicates a welding point with the burner head 8) so as to cover a portion where the flame holes 8a are provided. ing. Reference numeral 10a denotes a spot weld at both ends of the wire mesh for forming the wire mesh in an annular shape, and 10c denotes a cutout formed in the annular wire mesh 10. FIG. 2 is a perspective view of a wire mesh (a state before being formed into an annular shape) 10 used in FIG. At both ends of the wire gauze 10, spot welds 10a for forming the wire gauze in an annular shape are provided. At four corners of the wire gauze 10, notches 10b are provided along the direction of the metal wire.

The wire net 10 is attached to the burner head 8 as follows. First, four corners of the wire mesh 10 having a predetermined size are cut out along the direction of the metal wire.
b to form a notch 10c with each other.
a are spot-welded to each other to form the wire mesh 10 in an annular shape.
Next, the annular wire mesh 10 is press-fitted into the burner head 8, and the positioning projection 8c for mounting the burner head 8 on the vaporizer.
The wire mesh 10 is positioned at a predetermined position with respect to the burner head 8 by, for example, locating the wire mesh 10 and the notch 10c on the same straight line with a mold provided in a welding machine. Weld.

When the four corners of the wire mesh 10 are cut (or cut) along the direction of the metal wire, the cut ends are not as shown in FIG. 3 (the cut sides are indicated by broken lines in the figure). The metal wire 10d on the notch end side that is clearly formed can also be held by many of the plurality of intersecting metal wires, so that it is hard to come off.

FIG. 4 is a structural view of a hot air heater using the burner of the present invention. Now, the operation will be briefly described. First, the preliminary heater 3 is energized to preheat the vaporizer 1 to a temperature required to vaporize the liquid fuel. Vaporizer 1
When the preheating is completed, the thermistor 17 detects this and starts operation, the liquid fuel is fed into the vaporization chamber 12 via the oil supply pipe 16 and the oil supply pipe 15, and is heated and vaporized in the vaporization chamber 12 to be vaporized gas. Become.

When the vaporization chamber 12 is sufficiently filled with the vaporized gas, the needle 19 is moved downward by the solenoid valve 20 so as to shift to the original combustion operation. Then, the fuel gas is jetted toward the throat 2. The fuel gas ejected from the nozzle hole 13a has a diameter of the nozzle hole 13a due to an ejector effect,
A certain amount of primary air determined by the diameter of the throat 2 is taken in from the air intake hole 18 to become a mixed gas having a certain primary air ratio.

This mixed gas is sent to the burner head 4 and is ejected to the outside of the burner head 8 through the flame opening 8a of the burner head 8 and the wire mesh 10, and is ignited by a spark plug to form a flame, which is used for heating. Offered.

[0018]

According to the burner for liquid fuel combustion and the method of manufacturing the same of the present invention, notches are provided at the four corners of the wire net attached to the burner head in the direction of the metal wire, and the notches are formed by the notches. As a result, the notch work is facilitated, and the metal wire on the notch end side can be maintained in a state of being held by a plurality of intersecting metal wires. Therefore, the metal wire is less likely to come off, the positioning and welding at the time of welding with the burner head can be reliably performed, and inconveniences such as the metal wire being entangled in the welding machine can be eliminated, and the quality and productivity of the burner for liquid fuel combustion can be improved. Can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a burner head of a burner according to the present invention as viewed from the rear side.

FIG. 2 is a perspective view of a wire mesh used in the present invention.

FIG. 3 is an explanatory view of a cutout of a wire net in the present invention.

FIG. 4 is a structural diagram of a hot air heater using a burner according to the present invention.

FIG. 5 is an exploded view of a burner for liquid fuel combustion.

FIG. 6 is a perspective view of a conventional burner head viewed from a rear side.

FIG. 7 is a perspective view of the wire mesh used in FIG. 7;

FIG. 8 is an explanatory view of a notch in a conventional wire mesh.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vaporizer 2 Throat 3 Preheater 5 Flame holding ring 8 Burner head 8a Flame hole 10 Wire mesh 10a Spot weld between wire meshes 10b Notch 10c Notch

Claims (2)

(57) [Claims] 1. A burner for liquid fuel combustion, comprising a wire mesh woven by crossing mutually inclined metal wires around a burner head having a plurality of flame holes. A burner for liquid fuel combustion, wherein an annular wire mesh having a notch formed by a notch along a line direction is attached to a burner head. 2. A method for manufacturing a burner for liquid fuel combustion, comprising attaching a wire mesh woven by crossing mutually oblique metal wires around a burner head having a plurality of flame holes, wherein the metal wires are provided at four corners of the wire mesh. A notch cut along the direction of is provided, and the wire mesh is welded so as to form a notch portion at the four corner notches, thereby forming an annular wire mesh. The annular wire mesh is pressed into a burner head, and the notch portion is formed. A method for manufacturing a burner for liquid fuel combustion, comprising positioning the annular wire net and the burner head by positioning the burner head with the burner head.