JPH08200826A - Combustion device - Google Patents

Abstract

PURPOSE: To improve positional alignment accuracy between a barrel plate and a gas discharging cover by a method wherein one end part of a position restricting segment for restricting a position of the gas discharging cover is provided with a slant part to be inclined to be projected outwardly as it may be directed toward the other side of it. CONSTITUTION: One of the adjoining ends of a barrel plate 1 and a gas discharging cover 2 is provided with position restricting segments 27A to 27D for restricting a position of the gas discharging cover 2 in a direction crossing at a right angle with an axial direction of the barrel plate 1 while being projected toward the other side and contacted with the other side of it. The other ends of the position restricting segments 27A to 27D are provided with slant segments 28B to 28D inclined to be projected as they are directed to the other side. With such an arrangement as above, it is possible to improve a position alignment accuracy among the barrel side flanges 11A to 11D of the barrel plate 1 and the cover flanges 22A to 22D of the gas discharging over 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device in which an exhaust cover can be easily attached to a body plate of a heat exchanger.

[0002]

2. Description of the Related Art Generally, a combustion apparatus includes a heat exchanger having a cylindrical shell plate, a burner portion fixed to a lower end portion of the shell plate,
An exhaust cover fixed to the upper end of the body plate is provided, and the combustion gas generated by the burner portion passes through the body plate of the heat exchanger and is discharged from the exhaust cover.

Conventionally, the body plate and the exhaust cover have been fixed as follows. That is, the body plate has a quadrangular cross section, and a body plate side flange protruding outward in the horizontal direction is formed at an upper end portion along each side of the body plate. On the other hand, the exhaust cover is in the shape of a substantially quadrangular box having an open lower portion and a front portion, and a cover side flange portion corresponding to each flange of the body plate is formed at a lower end portion thereof. Then, after the cover-side flange portion is abutted against the body plate-side flange portion, both are fixed by a bolt, a rivet, a screw, or the like that penetrates them. Thereby, the exhaust cover is fixed to the body plate.

[0004]

In the case of fixing as described above, in order to prevent the positions of both flange portions and the positions of the insertion holes through which the bolts and the like are inserted from being displaced, the exhaust cover and the body plate are attached. Must be aligned accurately. However, there has been a problem that the alignment requires a lot of trouble. Further, there is a problem that if the bolts and the like are tightened after the alignment is performed, the positions are displaced again.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 provides a tubular body plate having a substantially rectangular cross section, and an exhaust cover for covering one end opening of the body plate. And a body plate side flange portion protruding outward in a direction substantially orthogonal to the axial direction of the body plate is formed at one end portion of the body plate, and a body plate side end portion of the exhaust cover, In a combustion device in which a cover-side flange portion that is abutted and fixed to the body plate-side flange portion is formed, one of the mutually adjacent ends of the body plate and the exhaust cover is projected toward the other side. , A position restricting portion that restricts the position of the exhaust cover in the direction orthogonal to the axial direction of the body plate by contacting the other is provided, and at least the other end of this position restricting portion is directed toward the other side. Therefore it projects outward It is characterized in that it is provided inclined portion inclined so. In this case, for the reason described below, it is desirable that at least two of the position restricting portions are formed so as to face in mutually different directions, and the inclined portions are formed in each of the position restricting portions. In addition, the position restriction unit,
It is desirable to integrally provide the outer edge of either one of the body plate side flange portion and the cover side flange portion.
Further, it is desirable to incline the entire position regulating portion so that the entire position regulating portion is the inclined portion. Further, it is preferable that at least one of the body plate side flange portion and the cover side flange portion is formed integrally by adjoining adjacent ones. Further, it is desirable to form a notch that reaches the flange portion between the adjacent position regulating portions formed on the continuous flange portions.

[0006]

In the invention according to claim 1, when the exhaust cover is attached to the body plate, the exhaust cover is formed with one of the exhaust cover and the body plate being in contact with the other. Move to the body side. Then, the position of the exhaust cover in the direction orthogonal to the axis of the body plate is gradually corrected appropriately with the movement by the inclined portion. When the exhaust cover is further moved and the inclined portion comes into contact with the other at the base end portion thereof, the position of the exhaust cover becomes the normal position, and then the position regulating portion comes into contact with the other. As a result, the positions of the exhaust cover and the body plate are properly aligned, and thus the flanges of both are properly aligned. In this case, by forming two position restricting portions and directing them in different directions, the position of the exhaust cover can be correctly aligned in two directions orthogonal to the axis of the body plate. Further, when the position regulating portion is formed on the outer edge portion of the flange portion, the position regulating portion and the flange portion are adjacent to each other, so that the positions of the body plate side flange portion and the cover side flange portion can be aligned more accurately. . Further, when the entire position restricting portion is tilted to form the entire inclined part, the position restricting portion also serves as the inclined portion, so that it is not necessary to form each of the two parts, and only the position restricting portion may be formed. . Therefore, the manufacturing can be easily performed. Further, when the adjacent flange portions are continuously formed integrally with each other, the strength of the flange portions is improved, and thus the attachment strength between the body plate and the exhaust cover can be improved. Further, in order to make the flange portions continuous, it can be performed, for example, by drawing. However, when performing such drawing processing, not only the flange portions but also the position regulating portions formed on the respective flange portions are If they are continuous, cracks may occur at the corners formed by the flange portion and the position regulating portion. In this respect, if a notch reaching the flange portion is formed in advance between the position restricting portions, such cracking can be prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. FIG. 1 is an exploded perspective view showing a combustion apparatus according to the present invention with a part thereof omitted, and reference numeral 1 is a body plate of a heat exchanger. The body plate 1 is made of a thin metal plate, and is formed in a tubular shape having a substantially rectangular cross section with its axis oriented in the vertical direction. Inside the body plate 1, there is provided a heat exchange unit (not shown) including a heat absorbing tube and a large number of fins provided on the heat absorbing tube. Also. A burner portion (not shown) is provided at the lower end of the body plate 1.

A flange portion (body plate side flange portion) is formed at the upper end of the body plate 1 so as to project outward in the horizontal direction. The flange portion may be formed only on two opposite sides or three sides of the body plate 1, but in this embodiment, the flange portions 11A, 1 are formed along each of the four sides of the body plate 1.
1B, 11C and 11D are formed respectively. In this case, since the flange portions 11A to 11D are formed by folding back the metal plate forming the body plate 1, the ends of the adjacent flange portions (for example, the flange portion 11A and the flange portion 11B) are separated from each other. However, it is also possible to form these flange portions 11A to 11D by drawing or the like so as to be continuous with each other and integrally formed. Further, one flange portion 11C along the long side of the body plate 1 and two flange portions 11 along the short side.
Screw holes 12 for screwing bolts (not shown) are formed in B and 11D.

An exhaust cover 2 for covering the upper end opening is attached to the upper end of the body plate 1 via flanges 11A to 11D. That is, as shown in FIGS. 1 to 3, the exhaust cover 2 has a cover body 21. The cover body 21 is formed of a thin metal plate into a substantially rectangular parallelepiped box shape, and the lower surface portion and the front surface portion thereof are open. Flange portions (cover-side flange portions) 22B, 22C, 22D that project outward in the horizontal direction are formed on both side portions of the cover body 21 and the lower end portion of the back surface portion.

Further, as shown in FIG. 3, the flange portion 22
A connecting plate 23 is bridged and fixed to the front end portions of B and 22D. The rear portion of the connecting plate 23 is located on the same plane as the flange portions 22B to 22D by bending the central portion of the connecting plate 23 in a stepwise manner, and this portion is located on the flange portion (cover side). Flange portion) 22A. In addition, on the back surface side of the flange portion 22A, a projecting portion 22a that projects obliquely upward is formed.

The flange portions 22A to 22D are the body plate 1
Corresponding to the flange portions 11A to 11D, respectively, and the quadrangular frame-shaped portion defined by the flange portions 22A to 22D is substantially the same as the quadrangular frame-shaped portion defined by the flange portions 11A to 11D. It has the same dimensions. Further, the flange portions 22B to 22D include
Bolt insertion holes 24 corresponding to the screw holes 12 of the flange portions 11B to 11D are formed. And the flange portion 2
2A to 22D are abutted against the flange portions 11A to 11D via gaskets (not shown) and the like, and the bolts that penetrate the bolt insertion holes 24 and are screwed into the screw holes 12 are tightened. 11D and the flange portions 22A to 22D are fixed, and thereby the exhaust cover 2 is attached to the body plate 1.

An exhaust port 25 having a quadrangular cross section is formed on the front surface of the exhaust cover 2 by the connecting plate 23 and the cover body 21, and the combustion gas passing through the inside of the body plate 1 is exhausted through the exhaust port 25. Is to be discharged from. Further, a front flange portion 26 is formed around the front opening portion of the exhaust port 25, and a lower end portion of the front flange portion 26 extends obliquely upward from the front flange portion 26, and the exhaust cover 2
A water drop receiver 26a is provided below the front end side of the lower opening of the.

The flange portions 22B to 22D are continuously provided with position restricting portions 27B to 27D which project vertically downward from their outer end portions. Further, at both end portions of the connecting plate 23, position restricting portions 27A that project vertically downward are formed. The position restricting portion 27A is arranged so as to be located on the same plane as the front edge of the flange portion 22A. Therefore, the position regulating portions 27A to 27
The quadrangle defined by D has flange portions 11A to 11A.
It is almost the same as a square divided by 1D. Therefore, when the flange portions 11A to 11D are inserted into the rectangular space defined by the position restricting portions 27A to 27D, the flange portions 11A to 11D and the flange portion 22A.
22D are properly aligned, and the bolt insertion holes 12 and 24 are properly aligned. Although the position restricting portions 27A are formed only at both ends of the connecting plate 23, they may be formed over the entire flange portion 22A, like the other position restricting portions 27B to 27D.

Further, the flange portions 11A to 11D are provided in a rectangular space defined by the position regulating portions 27A to 27D.
In order to allow easy insertion, the lower ends of the position restricting portions are bent downward so that they project obliquely outward (obliquely upward in FIG. 3). The inclined portion is integrally formed. In this embodiment, the inclined portions are three position regulating portions 2
7B to 27D are formed as the inclined portions 28B to 28D, respectively, but may be formed on all the position regulating portions 27A to 27D, or may be formed on only one position regulating portion. However, it is desirable to form the inclined portions in at least two position regulating portions, and particularly when the inclined portions are inclined only in the two position regulating portions, the position regulating portion 27
A, 27C or 27B, 27D rather than two opposing position restricting portions are formed, the position restricting portions 27B, 2
It is desirable to form it on two adjacent position regulating portions like 7C. The reason for this will be described later.

When the exhaust cover 2 is attached to the body plate 1 in the combustion apparatus having the above structure, first, the exhaust cover 2 is attached.
The flange portions 11A to 11D of the body plate 1 are inserted into the space defined by the position restriction portions 27A to 27D. At the time of this insertion, it is necessary to correctly adjust the positions of the exhaust cover 2 in the front-rear direction and the left-right direction, but this position adjustment can be easily performed by using the inclined portions 28B to 28D.

For adjusting the position in the front-rear direction, the inclined portion 28c is used. That is, the exhaust cover 2 is previously shifted to the back side by a slight amount with respect to the body plate 1, and the inclined portion 28C is brought into contact with the tip end portion of the flange portion 11C as shown in FIG. 4 (A). Next, while maintaining this contact state, the exhaust cover 2
Move down. Then, the exhaust cover 2 is moved to the rear (the direction of the arrow in FIG. 4A) along with the downward movement due to the contact between the inclined portion 28C and the flange portion 11C, and the position in the front-rear direction is corrected. . When the flange portion 11C passes through the inclined portion 28C, the flange portion 11C comes into contact with the position regulation portion 27C and the flange portion 11A comes into contact with the position regulation portion 27A as shown in FIG. 4 (B). The position of the exhaust cover 2 in the front-rear direction is adjusted correctly.

When adjusting the position in the left-right direction, either one of the inclined portions 28B and 28D is used. In this case, which inclined portion is used depends on whether the exhaust cover 2 is displaced to the left or right, and is determined by the position of the exhaust cover 2 at that time. For example, assuming that the exhaust cover 2 is displaced to the left with respect to the body plate 1, if the exhaust cover 2 is moved to the body plate 1 side,
As shown in FIG. 5, the inclined portion 28B contacts the corresponding flange portion 11B. By moving the exhaust cover 2 to the body plate 1 side in this state, the position adjustment in the left-right direction can be performed in the same manner as the position adjustment in the front-rear direction. Of course, the position adjustment in the front-back direction and the position adjustment in the left-right direction are simultaneously performed.

After the positions of the front and rear and the left and right are adjusted in this way, the exhaust cover 2 is further moved downward to insert the flange portions 11A to 11D into the spaces defined by the position regulating portions 27A to 27D. At this time, since the position of the exhaust cover 2 is properly adjusted, the flange portions 22A to 22D can be easily inserted. Then, the flange portions 22A to 22D of the exhaust cover 2 and the body plate 1
The flange portions 11A to 11D of the above.
At this time, the flange portions 11A to 11D and the flange portion 22
The positions of A to 22D are correctly aligned by the position restricting portions 27A to 27D. Moreover, the position regulation unit 27A
To 27D are formed on the flange portions 22A to 22D, and both are adjacent to each other, so both flange portions 11A to 11D;
22A-22D can be aligned more accurately. Then, the exhaust cover 2 can be fixed to the body plate 1 by inserting the bolt into the bolt insertion hole 24, screwing the bolt into the screw hole 12, and tightening the bolt.

By the way, as described above, the position adjustment of the exhaust cover 2 in the front-rear direction is performed by the inclined portion 28C,
The position adjustment in the left-right direction is performed by one of the two inclined portions 28B and 28D. As is apparent from this, the inclined portions substantially required for the front-back and left-right position adjustment are two adjacent inclined portions. In this embodiment, the inclined portions 28C and 28B or the inclined portions 28C and 28D are used. is there. Of course, when forming the inclined portion in the position restricting portion 27A, it is sufficient to form this inclined portion and one of the inclined portions 28B and 28D.

In other words, in the case where the inclined portions are formed only in the two position regulating portions, if the inclined portions are formed in the two opposing position regulating portions, one of the front-rear direction and the left-right direction is formed. You can only adjust the position of. For example, in this embodiment, the position regulating units 27B, 2
If the inclined portions 28B and 28D are formed only on 7D, the lateral position adjustment is possible, but the longitudinal position adjustment cannot be performed. Therefore, in the case of forming only two inclined portions, it is not the two opposing position regulating portions but
It is desirable to form it on two adjacent position regulating portions. In addition, when performing alignment in only one of the front-rear direction or the left-right direction, the position regulating portion and the inclined portion are set to 1
Only one needs to be formed.

Next, another embodiment of the present invention will be described. In the embodiment shown in FIG. 6, the position regulating portion and the inclined portion are formed on the body plate 11 without forming on the exhaust cover 2. That is, the flange portions 11B to 1B of the body plate 1
Position regulating portions 13B to 13D that regulate vertically upward are formed respectively on the outer edges of 1D, and the upper end portions of the position regulating portions 13B to 13D are inclined so as to obliquely extend outward. The parts 14B to 14D are respectively formed.

In this embodiment, the inclined portions 14B-1B1
4D and the position regulating portions 13B to 13D come into contact with the outer edge portion of the flange portions 22B to 22D of the exhaust cover 2 (of course, no position regulating portion is formed on this edge portion), so that the exhaust cover is formed. Two registrations are performed.

Further, in the embodiment shown in FIG. 7, two flange portions 11B and 11D are formed on the body plate 1, and each flange portion 1 is formed.
The position regulating portions 13B, 13D and the inclined portions 14B, 14D are formed on the 1B, 11D, and the position regulating portion 13C is directly formed on the upper end portion on the back side of the body plate 1, and further on the upper end portion of this position regulating portion 13C. The inclined portion 14C is formed. Of course, corresponding to this, the exhaust cover 2 is also formed with only two flange portions. In the case of this embodiment, as in the embodiment shown in FIG.
13D makes contact with the outer edges of the flanges 22B, 22D of the exhaust cover 2 to perform lateral alignment, but the alignment in the front-rear direction is performed by the position regulating portion 1.
1C and the inclined portion 14C are brought into contact with the lower end of the back surface of the exhaust cover 2.

In the embodiment shown in FIG. 8, the exhaust cover 2 is used.
Each of the position restricting portions 27B to 27D formed in the above is tilted over the whole.
.About.27D also serves as an inclined portion. In this case, since it is not necessary to separately form the inclined portion, the manufacturing becomes easier and the manufacturing cost can be reduced.

Further, in the exhaust cover 2'shown in FIG. 9, the body portion 21, the flange portions 22B to 22D, the position regulating portions 27B to 27, and the inclined portions 28B to 28D are integrally formed by drawing a metal plate. The flange portions 22B to 22D are formed continuously and integrally with each other. When the flange portions 22B to 22D are integrally formed in this way, not only can the strength thereof be improved, but also the strength of the exhaust cover 2'can be improved. This improvement in strength can also be achieved by forming only two adjacent flange portions, for example, only the flange portions 22B and 22C or the flange portions 22C and 22D, in a continuous manner.

Here, when the exhaust cover 2'is drawn, the corner portions formed by the flange portions 22B and 22C and the position regulating portions 27B and 27C, and the flange portions 22C and 22D and the position regulating portions 27C and 27D are used. In order to prevent cracks and the like from occurring in the formed corners due to drawing, a notch 29 that reaches a portion of the flange portions 22B, 22C, 22D on the tip side of the flanges 22B, 22C, 22D so as not to occur. Is preferably formed in advance. Further, in this embodiment, the front flange portion, the position regulating portion and the inclined portion are separately formed for the convenience of design, but they may be integrally formed depending on the design.

The flange portion 11 of the body plate 1 shown in FIG.
A to 11D, position regulating portions 13B to 13D and inclined portion 1
4B to 14D can also be drawn,
Also in this case, it is desirable to make it similar to the above.

Further, in the above-mentioned embodiment, the position restricting portion is provided only on one of the body plate 1 and the exhaust cover 2. However, if they are arranged so as not to face each other, the body plate 1 and the exhaust cover 2 are arranged. A position control unit may be provided for both of them.

[0029]

As described above, according to the first aspect of the present invention, it is possible to improve the alignment accuracy of the body plate and the exhaust cover, and further, to arrange the body in the space defined by the position regulating portion. The plate-side flange portion can be easily inserted. According to the second aspect of the present invention, it is possible to perform the alignment in two different directions, which allows the exhaust cover to be properly aligned with the body plate. According to the invention of claim 3, the body plate side flange portion and the cover side flange portion can be more accurately aligned. According to the invention of claim 4,
The manufacturing cost of the shell plate or the exhaust cover can be reduced. According to the invention of claim 5, it is possible to improve the strength of the flange portion, which in turn can improve the mounting strength between the body plate and the exhaust cover. According to the invention of claim 6, it is possible to prevent cracks from occurring when the flange portion and the position restricting portion are drawn.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a view showing an exhaust cover according to the present invention,
2A is its plan view, FIG. 2B is its front view, and FIG. 2C is its side view.

FIG. 3 is a perspective view seen from below showing a part of the exhaust cover omitted.

FIG. 4 is a cross-sectional view for explaining the position adjustment in the front-rear direction by the inclined portion, and FIG. 4 (A) shows a state in which the inclined portion is in contact with the tip of the body plate side flange portion. (B) shows a state in which the body plate side flange portion has passed the base end portion of the inclined portion.

FIG. 5 is a cross-sectional view for explaining position adjustment in the left-right direction by the inclined portion, showing a state in which the inclined portion is in contact with the tip of the body plate side flange portion.

FIG. 6 is a perspective view showing another embodiment of the body plate according to the present invention.

FIG. 7 is a perspective view showing still another embodiment of the body plate according to the present invention.

FIG. 8 is a sectional view showing another embodiment of the exhaust cover according to the present invention.

FIG. 9 is a perspective view showing still another embodiment of the exhaust cover according to the present invention.

[Explanation of symbols]

 1 Body plate 2 Exhaust cover 2'Exhaust cover 11A Flange part (drum plate side flange part) 11B Flange part (drum plate side flange part) 11C Flange part (drum plate side flange part) 11D Flange part (drum plate side flange part) 12 screw hole 13B position regulation part 13C position regulation part 13D position regulation part 14B inclined part 14C inclined part 14D inclined part 21 body part 22A flange part (cover side flange part) 22B flange part (cover side flange part) 22C flange part (cover) Side flange part) 22D Flange part (cover side flange part) 24 Bolt insertion hole 27A Position restriction part 27B Position restriction part 27C Position restriction part 27D Position restriction part 28B Inclined part 28C Inclined part 28D Inclined part

Claims (6)

[Claims] 1. A tubular body having a substantially rectangular cross section, and an exhaust cover for covering an opening at one end of the body, the one end of the body being substantially orthogonal to the axial direction of the body. A body plate side flange portion that projects outward in the direction is formed, and a cover side flange portion that is fixed to the body plate side flange portion by being abutted and fixed to the body plate side end portion of the exhaust cover is formed. In the device, the exhaust cover in the direction orthogonal to the axial direction of the shell plate by projecting toward the other side to one of the ends of the shell plate and the exhaust cover that are adjacent to each other and contacting the other side. Combustion device characterized in that a position restricting part for restricting the position of the position restricting part is provided, and at least the other end of the position restricting part is provided with an inclined part that is inclined so as to project outward toward the other side. . 2. The at least two position regulating portions are formed so as to face in mutually different directions, and each of the position regulating portions is provided with the inclined portion.
The combustion device according to 1. 3. The position restricting portion is integrally provided on an outer edge portion of either one of the body plate side flange portion and the cover side flange portion. The combustion device according to 1. 4. The whole of the position restricting portion is inclined so that the whole is the inclined portion.
The combustion device according to any one of 1 to 3. 5. The at least one of the body plate side flange portion and the cover side flange portion is formed integrally so that adjacent ones are continuous with each other. The combustion device according to claim 1. 6. A position regulating portion is formed on each of the adjacent flange portions that are continuous with each other, and a notch reaching the flange portion is formed between the adjacent position regulating portions. Item 5. The combustion device according to item 5.