JP2842278B2 - Burner manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a burner which is mainly used in a household combustor and which can be integrally formed.

[0002]

2. Description of the Related Art A conventional burner manufacturing method of this type is disclosed, for example, in Japanese Patent Publication No. 63-62650. As shown in FIG. 7, the rectifying bent portion 2 and the first groove 3 for forming the air-fuel mixture introduction portion are arranged in line symmetry with respect to the center bent portion 1.
The first flame port plate 4, the second groove 5 for forming the flame port, the flame port outer wall 6, and the mixing pipe section 7 are sequentially formed on the outside at appropriate intervals. And the central bent part 1 is made convex upward,
In some cases, the first groove 3 is bent downward and the second groove 5 is bent upward to be integrally formed.

[0003]

However, in the above-mentioned conventional construction, a total of 5 fold lines of the center fold 1, two fold lines of the first groove 2, and two fold lines of the second groove 5 are provided. It is necessary to bend the two folding lines completely parallel to each other. If a deviation occurs during the bending process, the five bending lines have a continuous configuration in which they are constrained to each other, so that errors are accumulated, and the height of the end face of the flame port constituting the outlet of the air-fuel mixture is likely to be uneven. Therefore, when the amount of combustion is reduced, the flame comes close to the end face of the flame, so that the portion protruding from the end face of the flame becomes red-hot. As described above, there is a problem that the processing accuracy and the variable width of the combustion amount are easily restricted. Also low noise bar
In the case of increasing the area of the flame opening and decreasing the jetting speed of the air-fuel mixture in order to reduce the air flow, the provision of the third groove makes it necessary to make a total of seven fold lines parallel to each other, and the above processing conditions become more severe. There was a problem that it was not possible to cope with the development of combustion capacity if it was a lever.

[0004] The present invention solves the above-mentioned conventional problems, and can cope with the variable width of the combustion amount and the development of the combustion capacity.
It is another object of the present invention to easily produce a low-noise burner.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a mixing pipe section which is arranged symmetrically with respect to a center bent section, and a mixture flow rate provided outside the mixing pipe section. A throttle portion for uniformization, a flame port outer wall provided outside the throttle section, a first groove for forming a flame port provided outside the outer wall of the flame port, and outside the first groove. The first flame port plate provided, the second groove for the mixture introduction portion formed outside the first flame port plate, and the second flame port plate provided outside the second groove Are sequentially formed, the central bent portion is bent downward, the first groove is bent upward, and the second groove is bent downward to be integrally formed, and then the required portions are welded.

A rectifying section is provided outside the throttle section, and a flame port outer wall provided outside the rectifying section is projected outward from the rectifying section outer wall, and only one side is provided outside the second flame port plate. The third groove and the third flame opening plate provided outside the third groove, the central bent portion is convex downward, the first groove is upward convex, the second groove downward convex. In addition, the third groove is bent upward so as to be integrally formed.

Further, the outer wall of the flame port, the first flame plate, and the second flame plate are formed in a wave shape, and the first groove and the third groove are connected by a plurality of upper connecting portions, After bending and integrally molding,
It cuts the upper connecting part.

[0008]

According to the present invention, the outermost flame opening plates on both sides of the center bending portion are bent independently of each other by half with the above structure. Therefore, the error at the time of bending is not accumulated since the error occurs at the center of the flame opening at the time of integral molding.

In addition, by keeping the entire length of the burner the same, the outer wall of the flame outlet protrudes outward from the wall surface of the rectifier outer wall to increase the width of the flame nozzle group and to provide the third flame nozzle plate. Since the area of the flame port is increased without increasing the equivalent diameter of the flame port, it is possible to reduce the ejection speed of the air-fuel mixture while preventing backing, and to reduce combustion noise.

[0010] In order to further improve the combustion capacity and increase the total length of the flame port, the plurality of upper connection parts prevent bending during bending and dropping or cutting of the flame port plate. By cutting, a protruding portion from the upper end face of the flame port where the flame is formed is eliminated, so that no red heat is generated.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a development view of a burner according to a first embodiment of the present invention, and shows a state in which one metal plate 8 is press-formed. FIG. 2 is a perspective view showing an assembled state of the burner. In FIG. 1, a mixing tube portion 10 is symmetrical with respect to a center fold portion 9, a throttle portion 11 for equalizing the mixture flow rate on the outside thereof, a rectifying portion outer wall 12 on the outside thereof, and a rectifying portion outer wall 12 on the outside. The corrugated outer wall 14 forming the corrugated port group 13 is press-molded sequentially and arranged on both sides. Further, a first groove 15 for forming a flame port is formed outside the flame port outer wall 14.
A first flame port plate 16 formed in a wave shape on the outside thereof to form each flame port group 13, a second groove 17 for forming an air-fuel mixture introduction section on the outside thereof, and each flame port group on the outside thereof. The corrugated second flame port plate 18 forming the plate 13 is sequentially formed.
Here, the upper connecting portion 1 having a narrow width is provided at both ends of the flame outer wall portion 14.
9 is provided and is connected to the first flame port plate 16 over the first groove 15. Similarly, the first flame port plate 16 and the second flame port plate 18 are connected by the lower connecting portion 20 which is slightly wider than the second groove 17.

In the above configuration, a forming process by folding will be described with reference to FIG. The central bent portion 9 is bent downward, the center of the upper connecting portion 19 is bent to project the first groove 15 upward, and the center of the lower connecting portion 20 is bent to bend the second groove 17 downward. . Therefore, as shown in FIG. 2, the pair of first flame port plate 16 and second flame port plate 18 are integrally joined to the inside of the flame port outer wall 14 to form half of the flame port group 13, and are bent at the center. The final flame group 1 is integrated with another pair of flame groups 13 that are symmetrical with each other via the portion 19.
Constituting No. 3. Therefore, if the three bending lines of the central bent portion 19, the first groove 15 and the second groove 17 are made parallel to each other, the upper end surfaces of the completed flame opening can be aligned. Also, even in the case where a deviation occurs, the edge is cut off because it is bent by half of the final molding state, and errors are not accumulated. After completion, the periphery is crimped, and the joints and required portions of each flame port group 13 are completed by laser or spot welding.

The structure of the flame port after completion will be described with reference to FIG. FIG. 3A is a top view of the burner port group 13 after the burner assembly is completed. FIG.
(B) and FIG. 3 (c). The air-fuel mixture passage is narrowed by the throttle portion 11, and the passage resistance is adjusted to achieve a uniform air-fuel mixture flow rate. The welding of the flame port group 13 is performed at the position of the cross section AA. FIG. 3B shows a state in which the first flame port plate 16 and the second flame port plate 18 are joined at the lower connecting portion 20.

A burner manufacturing method according to the second embodiment will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals. In FIG. 4, in addition to the first embodiment, a third groove 21 is formed outside the second flame opening plate 18 on only one side of the center bent portion 9, and the third groove 21 is formed.
A third flame port plate 22 is provided on the outside, and is connected to the second flame port plate 18 at the upper connecting portion 19. Also, the flame outlet portion outer wall 14 is formed so as to protrude outside the wall surface of the rectifying portion outer wall 12. In the bending process, the central bent portion 9 is projected downward, the first groove 15 is projected upward, the second groove 17 is projected downward, and the third groove 21 is projected.
Is bent upward to form a single piece, and then welded to complete the required parts.

The structure of the flame port after completion will be described with reference to FIG. FIG. 5A is a top view of the burner port group 13 after the burner assembly is completed. FIG.
(B) and FIG. 5 (c). The flame port outer wall 14 projects outward from the wall surface of the rectifying section outer wall 12, and the width of the flame port group 13 is increased. Here, by providing the third flame port plate 22 at the center of the flame port, the area of the flame port can be increased without increasing the equivalent diameter of each flame port 23. Therefore, it is possible to reduce the ejection speed of the air-fuel mixture flowing out from the flame outlet 23 and reduce the combustion noise. Further, even if the combustion amount is small and the ejection speed is reduced, backing can be prevented because the equivalent diameter of the flame outlet 23 is kept constant. In particular, when a large amount of air is mixed with a fuel to form a lean mixture to form a low-NOx NOx, and a lean flame having a low flame temperature is formed on the flame outlet, the flame outlet velocity becomes large, so that low noise is generated. It is a very effective means for the conversion.

A case in which the number of the flame port groups 13 is increased in the longitudinal direction of the burner to increase the total length and increase the combustion capacity will be described with reference to FIG. When the overall length is increased in FIGS. 1 and 4, the first flame port plate 16, the second flame port plate 18, and the third flame port are provided in order to prevent bending, falling off and cutting of the flame port plate during bending. The plates 22 are connected to each other at a number of upper connection portions 19 and lower connection portions 20 to ensure strength.
After integral molding, the upper connecting portion 19 is cut by a press or a laser. Accordingly, there is no protruding portion from the upper end face of the flame port where the flame is formed, and a portion protruding in the vicinity of the flame formed on the flame port is eliminated, so that no red heat is generated.
Therefore, it is possible to easily cope with the development of the combustion capacity.

[0017]

As described above, according to the burner manufacturing method of the present invention, the following effects can be obtained.

(1) The burner can be easily manufactured because the same metal plate can be integrally formed, and mass productivity can be greatly improved since continuous molding can be performed.

(2) Since the bending process of the flame opening can be divided into １ ／, the deviation of the bending line at the time of the bending process is cut off at the center of the flame opening, so that the processing can be simplified.

(3) Since the area of the flame port can be increased without increasing the equivalent diameter of the flame port, combustion noise can be reduced and backing can be prevented.

(4) The upper connecting portion is cut off after assembling, and a portion protruding in the vicinity of the flame formed on the flame port is eliminated. Therefore, even if the number of flame ports is increased, no red heat is generated, and the combustion capacity can be developed. Easy to achieve.

[Brief description of the drawings]

FIG. 1 is an overall development view of a burner according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an assembled state of a burner in the embodiment.

3A is a partially enlarged view of the burner according to the embodiment after assembly; FIG. 3B is a partially enlarged view of a section AA in FIG. 3A; FIG. 3C is a partially enlarged view of a section BB in FIG. 3B;

FIG. 4 is an overall development view of a burner according to a second embodiment of the present invention.

5A is a partially enlarged view of the burner according to the embodiment after assembly; FIG. 5B is a partially enlarged view of a section AA in FIG. 5A; FIG. 5C is a partially enlarged view of a section BB in FIG.

FIG. 6 is a partial cross-sectional view showing a cut state of an upper connecting portion in the embodiment.

FIG. 7 is a developed view showing a conventional burner.

[Explanation of symbols]

 9 Central bent part 10 Mixing pipe part 11 Restricted part 12 Straightening part outer wall 14 Flame opening part outer wall 15 First groove 16 First flame opening plate 17 Second groove 18 Second flame opening plate 19 Upper connecting part 21 Article 3 Groove 22 Third flame mouth plate

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoichi Kimura 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A 57-127121 (JP, U) JP-A 48-81430 (JP, U) JP-B 63-62650 (JP, B2) JP-B 51-15154 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) F23D 14/08

Claims (3)

(57) [Claims] 1. A mixing pipe section arranged in line symmetry with respect to a center bent section, a throttle section provided outside the mixing pipe section for equalizing a flow rate of an air-fuel mixture, and a throttle section outside the throttle section. The provided flame port outer wall, a first groove for flame port formation provided outside the flame port outer wall, a first flame port plate provided outside the first groove, A second groove for forming an air-fuel mixture introduction portion provided outside the first flame port plate, and a second flame port plate provided outside the second groove groove are sequentially formed, and the center bent portion is formed. A method of manufacturing a burner, comprising: bending the first groove downward, the first groove upward, and the second groove downward convex to form an integral part, and then welding a required portion. 2. A mixing pipe section arranged in line symmetry with respect to a center bent section, a throttle section provided outside the mixing pipe section for equalizing an air-fuel mixture flow rate, and a throttle section outside the throttle section. A rectifying portion outer wall provided, a flame port outer wall provided outside the rectifying portion outer wall, a first groove for forming a flame port provided outside the flame port outer wall, and the first A first flame port plate provided outside the groove, a second groove for forming an air-fuel mixture introduction portion provided outside the first flame port plate, and a second groove provided outside the second groove. The second flame port plate is sequentially formed, and the flame port outer wall is made to protrude outward from the wall surface of the rectifying section outer wall, and a third groove provided on one side only outside the second flame port plate. A third flame opening plate is provided outside the third groove, the central bent portion is convex downward, the first groove is convex upward, and the second groove is downward. Convex, after integrally molded by bending in a convex said Article grooves upward, bar welding the predetermined position - Na production method. 3. A flame port outer wall, a first flame port plate, and a second flame port plate are formed in a wave shape, and the first groove and the third groove are connected by a plurality of upper connecting portions, 3. The burner manufacturing method according to claim 2, wherein the upper connecting portion is cut after being bent and integrally formed.