JPH08200630A - Straightening plate for burner - Google Patents

Abstract

PURPOSE: To relatively simply form, and to relatively easily assemble straightening plates by integrally forming at least two straightening plates placed at the right and left of burning parts with coupling pieces for coupling the plates of the right and left from one plate. CONSTITUTION: A burner port 5 for burning a mixed gas of a fuel gas and combustion air is formed at one end face. A plurality of flat burning parts 3 each having a mixing chamber 7 communicating with the port 6 and an inlet 8 for introducing the fuel gas and the air at the chamber 7 are aligned at an interval, and straightening plates 15 are installed between the parts 3. In this case, at least the two plate 15 installed at the right and left of each part 3, and coupling pieces 17 for coupling the plates 15 of the right and left are integrally formed from one plate. Thus, they can be relatively simply and easily assembled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a flame port for burning a mixture of fuel gas and combustion air formed on one end surface, and
A plurality of flat combustion parts, each having a mixing chamber communicating with the flame opening and an introduction port for introducing the fuel gas and the combustion air into the mixing chamber, are arranged in parallel with each other at intervals. The present invention relates to a rectifying plate of a combustion device in which a rectifying plate is arranged.

[0002]

2. Description of the Related Art As a combustion apparatus having such a structure, a combustion apparatus of the type in which secondary air is supplied from between the above-mentioned flat combustion sections or a primary air mixing ratio between the flat combustion sections is controlled. There are various types of combustion devices such as a so-called rich-lean combustion device that discharges and burns a large light-air mixture.
Further, in this type of combustion apparatus, the current plate provided between the combustion sections has conventionally been configured separately.

[0003]

Therefore, for example,
When the two straightening vanes located on the left and right of the combustion part are assembled to the burning part by spot welding, or when they are assembled to the case body, there is a drawback that the left and right straightening plates must be handled separately. . In particular, in this type of combustion device, since there are a plurality of the combustion sections and there are straightening vanes on the left and right with respect to each burning section, the number of straightening vanes is considerable, and one such straightening vane is used. Since they have to be handled separately and mounted individually, the mounting work becomes complicated and this is one of the causes of an increase in the cost of the combustion device.

The present invention solves such a conventional problem, and an object of the present invention is to make it possible to form a straightening vane relatively easily, and to mount the straightening vane relatively easily. The present invention is to provide a straightening plate for a combustion device that can be used.

[0005]

In order to achieve this object, the first characteristic constitution of the current plate of the combustion apparatus according to the present invention is such that the flame port for burning the mixture of the fuel gas and the combustion air has one end face. A plurality of flat combustion sections, each of which is formed in the same manner and has a mixing chamber communicating with the flame port and an introduction port for introducing the fuel gas and the combustion air into the mixing chamber. A straightening plate for a combustion apparatus in which a straightening vane is provided between these burning parts, and at least two straightening vanes located on the left and right of each burning part are connected to these left and right straightening plates. The connecting piece and the connecting piece are integrally formed from one plate-shaped body.

In the second characteristic configuration, the connecting piece is composed of two connecting pieces located at both ends of the left and right flow straightening plates.
The point is that individual connecting pieces can be placed on the upper surfaces of both ends of the combustion section.

A third characteristic structure is that when the left and right flow straightening plates are assembled to the combustion part, the combustion air or the combustion air that bulges toward the flame mouth side of the combustion part and flows along the flow straightening plate. The bulging portion for controlling the flow velocity of the mixture of the fuel gas and the fuel gas is formed integrally with the rectifying plate.

A fourth characteristic structure is that the two straightening vanes are left and right inner straightening vanes adjacent to the combustion section, and the connecting pieces for connecting the inner straightening vanes are inner connecting pieces.
Further, the left and right outer straightening vanes positioned outside the left and right inner straightening vanes, the outer connecting piece that connects the left outer straightening vane and the left inner straightening vane, and the right outer straightening vane and the right outer straightening vane. The outer connecting piece for connecting the inner straightening vane is integrally formed from the plate-like body forming the inner straightening vane.

A fifth characteristic configuration is a bulging projection that bulges toward the left and right inner flow rectifying plates when the left and right flow rectifying plates are assembled to the combustion section, and holds the space between the inner and outer flow rectifying plates. Is formed integrally with the left and right outer straightening vanes.

In a sixth characteristic configuration, projecting piece through holes for inserting projecting pieces projecting from the combustion section are formed at both ends of the left and right inner straightening vanes, and the projecting pieces are formed. The claw pieces that can be inserted into the claw piece through holes are integrally projected from both ends of the left and right outer flow straightening plates.

[0011]

According to the first characteristic construction of the present invention, in the combustion apparatus having a plurality of combustion sections as described above, at least two straightening vanes located on the left and right of each combustion section are formed into one plate shape. Since it is formed integrally from the body, not only can the two straightening vanes be formed relatively easily, but the connecting piece that connects these two straightening vanes is also integrally formed from the same plate-shaped body. Therefore, after the formation, the two straightening vanes are connected to each other by the connecting piece, and the two straightening vanes can be handled as one component. Therefore, right and left straightening vanes can be assembled to each combustion part by spot welding,
The work for assembling into the case body or the like is easy, and the work of assembling the current plate to the plurality of combustion parts can be simplified as a whole, and the cost can be reduced by improving the work efficiency.

According to the second characteristic configuration, the connecting piece is composed of two connecting pieces located at both ends of the left and right flow plates, and these two connecting pieces can be placed on the upper surfaces of both ends of the combustion section. Since it is configured as described above, it is possible to hold the positions of the left and right baffles with respect to the combustion part by using this connecting piece, and temporarily hold the position during the assembly work to facilitate the work, or to the combustion part. It can also be used for positioning, and since both connecting pieces are located at both ends of the straightening vane, they do not adversely affect the original combustion action of the combustion apparatus.

According to the third characteristic configuration, when the left and right straightening vanes are assembled to the combustion portion, the combustion air or the combustion air that bulges toward the flame mouth side of the burning portion and flows along the straightening vane. Since the bulging portion for controlling the flow velocity of the air-fuel mixture of the working air and the fuel gas is formed integrally with the rectifying plate, the bulging portion for preventing the blowout of the flame formed in the burner flame port. Can be formed integrally with the straightening vane, and if the straightening vane is positioned with respect to the combustion part by using the connecting piece, the bulging portion can be positioned at a desired position of the combustion part.

According to the fourth characteristic construction, the two straightening vanes are left and right inner straightening vanes adjacent to the combustion section, and the connecting piece for connecting the inner straightening vanes is an inner connecting piece. Further, the left and right outer straightening vanes positioned outside the left and right inner straightening vanes, the outer connecting piece that connects the left outer straightening vane and the left inner straightening vane, and the right outer straightening vane. Since the outer connecting piece for connecting to the right inner straightening vane is integrally formed from the plate-like body forming the inner straightening vane, a total of four straightening vanes are formed from one plate-like body. Since the four straightening vanes can be easily formed and can be handled as one component, the work of assembling the straightening vanes to a plurality of combustion sections can be greatly simplified as a whole. .

According to the fifth characteristic configuration, when the left and right baffle plates are assembled to the combustion section, the baffle plate expands to the left and right inner baffle plates to maintain the space between the inner baffle plate and the outer baffle plate. Since the protrusions are formed integrally with the left and right outer straightening vanes, in addition to the above-mentioned flame blowout bulging portion, there is also one bulging protrusion for maintaining the space between the inner and outer straightening vanes. It can be formed all at once from the shape.

According to the sixth characteristic configuration, projecting piece through holes for inserting projecting pieces projecting from the combustion section are formed at both ends of the left and right inner flow straightening plates, and the projecting pieces are formed. Since the claw pieces that can be inserted into the formed claw piece through holes are integrally provided so as to project from both ends of the left and right outer flow straightening plates, first, the combustion portion is formed in the projecting piece through holes of the inner flow straightening plate. By inserting the projection piece, and then inserting the claw piece of the outer flow straightening plate into the through hole for the claw piece of this projection piece, this claw piece acts as a retainer for the inner straightening flow plate, and a total of four straightening pieces are formed. The plates can be easily assembled to the combustion part, and a total of four straightening vanes are formed at once from one plate-shaped body including the through holes for projecting pieces and the claw pieces for this assembly. be able to.

[0017]

As described above in detail, according to the first characteristic structure, at least two straightening vanes can be formed relatively easily from one plate-like body, and the straightening of these two straightening vanes is also possible. The plate can be handled as one component, and subsequent assembling work can be simplified and cost can be reduced by improving work efficiency.

According to the second characteristic configuration, the left and right straightening vanes can be held and positioned with respect to the combustion portion by using the connecting pieces located at both ends of the left and right straightening vanes, facilitating the assembling work and burning. It is possible to reliably position the straightening vane with respect to the portion.

According to the third characteristic configuration, the flow velocity of the combustion air or the mixture of the combustion air and the fuel gas flowing along the straightening vanes is controlled to blow off the flame formed at the combustion port. The bulging portion that prevents the bulge can also be formed integrally with the current plate, and by using the connecting piece, the bulging portion can be positioned at a desired position of the combustion portion.

According to the fourth characteristic construction, a total of four straightening vanes, that is, the left and right inner straightening vanes and the outer straightening vanes can be easily formed from a single plate-shaped body, and the four flat vanes can be easily formed. The straightening vane can be handled as one component, and the work of assembling the straightening vane can be greatly simplified.

According to the fifth characteristic configuration, in addition to the bulging portion for extinguishing the flame, bulging projections for maintaining the distance between the inner and outer rectifying plates can be formed at once from one plate-shaped body. it can.

According to the sixth characteristic configuration, the projecting piece through holes and the claw pieces are also integrally formed from one plate-shaped body forming the four flow regulating plates, and the projecting piece through holes and the projecting piece through holes are formed. By utilizing the claw pieces and the protruding pieces on the combustion section side, a total of four straightening vanes can be easily assembled to the combustion section.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A straightening vane of a combustion apparatus according to the present invention is used for a combustion apparatus used in, for example, a burner unit of a hot water supply apparatus, and an embodiment applied to a rich / lean combustion apparatus will be described with reference to the drawings. As shown in FIG. 1 to FIG. 3, a large number of burners 3 for rich combustion as flattened rich combustion portions are arranged side by side at predetermined intervals inside a box-shaped frame body 2 that is internally provided in a burner case 1. Has been done. Below the burner case 1,
A fan 4 for supplying combustion air is positioned, and a discharge port 4a of the fan 4 is opened at the bottom of the burner case 1, and a space between the bottom of the burner case 1 and the bottom of the box-shaped frame 2 is provided. An air chamber 5 is formed.

The rich combustion burner 3 has a flat rich flame port 6 for upwardly discharging a rich air-fuel mixture having a small primary air mixing ratio.
And a rich mixing chamber 7 communicating with the rich flame port 6, and a rich inlet 8 for introducing a fuel gas for producing a rich mixture and combustion air into the rich mixing chamber 7. ing. The burner 3 for rich combustion is formed of a single plate-shaped body made of metal, and the plate-shaped body is bent and stuck at the portion of the flame opening 6 for richness, and the burner 3 for richness and the rich mixture chamber 7 are concentrated. And a fuel gas and a combustion air are provided in the lean gas burner 9, which will be described later. A plurality of thickening flames each having an elliptical cross-sectional shape introducing port 11 are integrally formed of the same plate-like member, the periphery of which is joined by spot welding, and three bent holes are formed in the bent portion. A mouth 6 is formed.

The flat rich burners 3 thus formed are housed side by side in the box-shaped frame body 2 at a predetermined interval, so that the adjacent rich burners 3 are flat. A space is formed, and this space is used to form the burner 9 for light combustion as the light combustion section. Specifically, between the rich flame openings 6 of the rich combustion burner 3, there is formed a light flame opening 12 for discharging a light air-fuel mixture having a large primary air mixing ratio upward. Is formed as a light mixing chamber 13, and a mixture gas is ejected into the light mixing chamber 13 from a plurality of jet ports 14 formed in the light gas communicating passage 10. Is configured.

As is clear from FIG. 3, straightening vanes 15 and 16 for straightening and discharging the lean air-fuel mixture along the longitudinal direction are provided at each of the leaning flame ports 12 of the lean burning burner 9 as shown in FIG. ,
There are two sets of two, that is, four sets in total, and two straightening vanes 15 and 16 on the left side are provided on the left side burner 3 for rich combustion and two on the right side. Straightening plates 15, 16
Are assembled and fixed to the burner 3 for rich combustion on the right side. That is, with the burner 3 for rich combustion as the center, two straightening vanes 15 and 16 arranged on the left side and two straightening vanes 15 and 16 arranged on the right side are assembled and fixed to the same burner 3 for rich burning. Has been done.

As shown in the development view of FIG. 6, a total of four rectifying plates, that is, the two rectifying plates 15 and 16 on the left side and the two rectifying plates 15 and 16 on the right side are made of one metal. Is integrally formed from the plate-shaped body. To be more specific, the right and left rectifying plates 1
Among the five and 16, two inner straightening vanes 15 close to the rich burner 3 and two outer straightening vanes 16 located outside both inner straightening vanes 15 are all one plate-like body. The two inner rectifying plates 15 are integrally formed with each other, and are connected only by two inner connecting pieces 17 provided at both ends in the longitudinal direction, and a slit-like notch is provided between the inner connecting pieces 17. Has been. The inner rectifying plate 15 and the outer rectifying plate 16 are also connected to each other by three outer connecting pieces 18, and slits are also cut out except for the connecting portions.

The inner flow straightening plate 15 is provided with slit-like projecting piece through holes 20 through which projecting pieces 19 described later can be inserted, at both ends in the longitudinal direction thereof, and is attached to the burner 3 for rich combustion. At this time, a plurality of inner bulging portions 21 bulging in the direction approaching the thickening flame port 6 side are integrally formed. Claw pieces 23 that can be inserted into through-holes 22 for claw pieces, which will be described later, are integrally projected at both ends of the outer rectifying plate 16 in the longitudinal direction, and when the claw pieces 23 are assembled to the burner 3 for rich combustion, Outer bulging portion 24 bulging in the direction closer to the rectifying plate 15 side
Are integrally formed at three locations, namely, the central portion and both side portions in the longitudinal direction, and when assembled, the inner straightening plate 1 is also formed.
Two inward bulging projections 25 bulging in the direction close to the 5 side
However, further, seven outward bulging projections 26, which bulge outward when assembled, are integrally formed on one of the both outer side straightening vanes 16.

As shown in FIGS. 4 and 5, the burner 3 for rich combustion has a plate-like shape which forms burners 3 for rich combustion at both ends of the flat burner 3 for rich combustion in the longitudinal direction. Projecting pieces 19 that can be inserted integrally into the projecting piece through holes 20 from the body are provided on the left and right, and the projecting pieces 19 can be inserted with the claw pieces 23 of the outer flow straightening plate 16. Through hole 22
Is engraved. Then, in order to assemble the inner and outer straightening vanes 15 and 16 to the rich combustion burner 3, first, the four straightening vanes 15 and 16 formed from one plate-like body are placed inside as shown in FIG. The connecting piece 17 and the outer connecting piece 18 are bent, and as shown in FIG. 5B, the projecting piece 19 on the rich combustion burner 3 side is provided with the projecting piece through hole 20 of the inner straightening vane 15. Fit on the outside. After that, as shown in FIG. 5C, when the claw pieces 23 of the outer straightening vane 16 are inserted into the through-holes 22 for the claw pieces formed in both the projecting pieces 19, the claw pieces 23 of the outer straightening vane 16 are adjusted to the inner straightening. The outer rectifying plate 1 acts as a retainer for the plate 15 and
Since 6 is assembled to the burner 3 for rich combustion by inserting the claw piece 23 into the claw piece through hole 22, the inner straightening vane 15 and the outer straightening vane 16 are not particularly required even if the tip of the projecting piece 19 is not bent. It can be assembled to the burner 3 for rich combustion.

In this assembled state, both inner connecting pieces 17 straddle the upper surfaces of both ends of the rich burner 3, so that the inner straightening vane 15 and the outer straightening vane 16 are assembled together. Sometimes both inner connecting pieces 1
7, it is possible to temporarily hold both of the flow control plates 15 and 16 with respect to the burner 3 for rich combustion, which can facilitate the assembling work. If the connecting piece 17 is configured to contact the upper surfaces of both ends of the rich combustion burner 3, both inner connecting pieces 17 will be formed.
Therefore, it can be used also as a positioning member for both the straightening vanes 15 and 16 with respect to the burner 3 for rich combustion. Further, in a state in which both of the straightening vanes 15 and 16 are assembled, the inner bulging portion 21 has a plurality of thickening flame ports 6 formed of three slit holes.
Corresponding to the above, it is arranged on both sides thereof, and is configured to suppress the flow velocity of the light air-fuel mixture in this portion to prevent blow-out of the thickening flame. 25
Is the distance from the inner straightening vane 15, and the outward bulging projection 26
Acts so as to maintain the distance between each of the adjacent outer straightening vanes 16.

The rich inlet 8 of the rich burner 3 and the lean inlet 11 of the lean burner 9 are opened close to each other in the same direction. A rich gas header 27 for distributing and supplying the fuel gas and a light gas header 28 for distributing and supplying the light fuel gas are located.
Both of these headers 27, 28 are arranged vertically with the rich gas header 27 facing upward, and the upper rich gas header 2 is provided.
7, a large number of rich gas nozzles 29 are attached to the lower light gas header 28, and a light gas nozzle 30 is attached to the lower light gas header 28.

Each enrichment gas nozzle 29 faces each enrichment inlet 8, and when the fuel gas is blown from this enrichment gas nozzle 29, the combustion air in the air chamber 5 is enriched at a predetermined ratio by the ejector action. The mixture is sucked into the introduction port 8 and mixed in the course of passing through the rich mixing chamber 7 to generate a rich mixture, and this rich mixture is discharged from the rich flame port 6. Similarly, each light gas nozzle 30 faces each light introducing port 11, and the fuel gas is blown from the light gas nozzle 30 to cause air chamber 5 to flow.
Of the combustion air is sucked into the light introduction port 11 at a predetermined ratio by the ejector action, and is premixed in the course of passing through the light gas passage 10, and the air-fuel mixture is ejected from the outlet 1 of the light gas passage 10.
It is jetted from 4 to the mixing chamber 13 for light. Then, in the light-mixing chamber 13, the air-fuel mixture from the ejection port 14 and the combustion air from the air chamber 5 are mixed to generate a light-air mixture, and the light-air mixture is discharged from the light-flame port 12. Let them do it.

The light air-fuel mixture thus generated is discharged from the light-air flame ports 12 and burned, and the primary air-fuel ratio is small from the rich-air flame ports 6 adjacent to the light-air flame ports 12 alone. By discharging and burning a rich mixture capable of stable combustion, the combustion mixture of this rich mixture provides a flame-holding effect that allows the light mixture to be stably and continuously burned. Stable combustion is possible while suppressing the generation of NOx as much as possible.

A rich gas supply path 31 is connected to the rich gas header 27, and a light gas supply path 32 is connected to the light gas header 28. The two supply paths 31 and 32 are branched. A main gas amount adjusting valve V for adjusting the total amount of fuel gas to be supplied is provided in the main gas supply passage 33 on the upstream side of the location. The main gas amount adjusting valve V is for adjusting the heating power by changing the supply amount of the fuel gas to the combustion device, and when the main gas amount adjusting valve V requires a weak heating power that cannot be adjusted. Is the burner 3 for rich combustion and the burner 9 for light combustion,
Only some of the light burners 9 and some of the rich burners 3 located on both sides thereof are burned.

[Other Embodiments] The above-described embodiments are examples in which the straightening vanes of the present invention are applied to a rich / lean combustion device. However, in addition to the dense / lean combustion device, for example, for combustion arranged in parallel with each other at intervals. The present invention can be applied to various combustion devices such as a combustion device configured to supply only secondary air for combustion from the space between burners.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a right side sectional view of a combustion device.

FIG. 2 is a partially cutaway perspective view of a combustion device.

FIG. 3 is an enlarged cross-sectional view of a combustion device when viewed from the front.

FIG. 4 is a perspective view of the rich combustion section.

FIG. 5 is a perspective view of a main part showing a structure for mounting a current plate.

FIG. 6 is a development view of a current plate

FIG. 7 is a perspective view showing a state in which the current plate is bent.

[Explanation of symbols]

 3 Combustion part 6 Flame port 7 Mixing chamber 8 Inlet port 15 Inner straightening plate 16 Outer straightening plate 17 Inner connecting piece 18 Outer connecting piece 19 Projecting piece 20 Through hole for projecting piece 21 Swelling part 22 Through hole for claw piece 23 Claw piece 25 Bulging protrusion

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroaki Doi 1-152 Minami-shi Oka, Minato-ku, Osaka, Osaka Prefecture 1-52 Harman Co., Ltd. Issue Shinko Tech Co., Ltd.

Claims (6)

[Claims] 1. A mixing chamber (7) having a flame opening (6) for burning a mixture of fuel gas and combustion air formed at one end surface and communicating with the flame opening (6), and the mixing chamber (7). A plurality of flat combustion sections (3) having an inlet (8) for introducing the fuel gas and the combustion air into the chamber (7) are arranged side by side at intervals, and these combustion sections (3) are arranged. Current plate (15) between
A straightening plate of a combustion device in which at least two straightening plates (15) located on the left and right of each combustion section (3) are connected to the left and right straightening plates (15). A straightening plate for a combustion device in which the piece (17) is integrally formed from a single plate-shaped body. 2. The left and right straightening vanes (1) of the connecting piece (17).
5) consists of two connecting pieces located at both ends,
The current plate of the combustion apparatus according to claim 1, wherein the connecting pieces (17) can be placed on the upper surfaces of both ends of the combustion section (3). 3. When the left and right baffle plates (15) are assembled to the combustion section (3), the flame port (6) of the combustion section (3) is set.
A swelling portion (21) that bulges to the side and controls the flow velocity of combustion air or a mixture of combustion air and fuel gas flowing along the straightening vane (15), is integrated with the straightening vane (15). The straightening vane of the combustion device according to claim 2, which is formed in a uniform manner. 4. The two straightening vanes (15) are left and right inner straightening vanes close to the combustion part (3), and the connecting piece (17) connecting these inner straightening vanes (15) is inside. The left and right inner flow straightening plates (1
Left and right outer straightening vanes (16) located outside of 5)
And the left outer baffle (16) and the left inner baffle (1
5), and an outer connecting piece (18) for connecting the right outer straightening vane (16) and the right inner straightening vane (15) to the inner straightening vane (18). 15)
The straightening plate of the combustion device according to claim 2 or 3, wherein the straightening plate is integrally formed from a plate-like body that forms the. 5. When the left and right straightening vanes (15), (16) are assembled to the combustion section (3), they bulge toward the left and right inner straightening vanes (15) side and the inner straightening vane (15) and the outer side. The rectifying plate for a combustion apparatus according to claim 4, wherein the bulging projections (25) for maintaining a distance from the rectifying plate (16) are integrally formed with the left and right outer rectifying plates (16). 6. A projecting piece through hole (20) for inserting a projecting piece (19) projecting from the combustion section (3) is formed at both ends of the left and right inner straightening vanes (15), and A claw piece (23) that can be inserted into a claw piece through hole (22) formed in the projecting piece (19) is integrally projected from both ends of the left and right outer flow straightening plates (16). Item 4. A straightening plate for a combustion device according to item 4 or 5.