JP7795905B2 - Chimney with a jinbaori hat - Google Patents

Description

The present invention relates to a chimney, and in particular to a chimney with a chimney cap at the tip.

Chimneys with a chimney cap are well known (see Patent Document 1, etc.). Generally, this type of chimney cap includes a roof that covers the top of the tip opening of the chimney body, and multiple support columns that support it. Smoke (exhaust gas) emitted from the tip opening is discharged from the side of the chimney cap between adjacent support columns. The support columns are erected on the tip surface of the chimney body. The tip surface of the chimney body is covered with a tip cover made of metal such as stainless steel. The tip cover, and therefore the chimney body, are connected to the lower end of the support columns by connecting means consisting of bolts and nuts.

Japanese Utility Model Publication No. 61-068551

In the conventional chimney with a chimney cap, the support posts and the bolts and nuts of the connecting means are positioned so that they overlap the tip surface of the insulating wall material of the chimney body in a plan view. This means that there is a risk that water, such as rainwater, will seep into the insulating wall material through the bolt insertion holes in the tip cover or between the threads of the bolts and nuts. In addition, it is necessary to form a recess in the tip surface of the insulating wall material for the bolt heads or nuts of the connecting means.
In view of the above circumstances, the present invention aims to prevent water such as rainwater from seeping into the inside of the insulating wall material of the chimney body along the connecting means between the chimney body's support pole and the chimney body in a chimney with a chimney cap, and to eliminate the need to form a recess for the bolt head or nut of the connecting means on the tip surface of the insulating wall material.

In order to solve the above problems, the present invention provides a chimney with a chimney cap, which is provided at the tip of a chimney body including a heat insulating wall material and which constitutes a smoke exhaust section,
The tip surface of the chimney body is covered with an annular tip cover, a support pillar supporting the roof of the chimney is erected on the tip cover, and the lower end of the support pillar and the tip cover are connected by a connecting means,
The tip cover extends outward from the insulating wall material, and the connecting means is disposed on the outward extending portion.
In this chimney with a chimney cap, the connecting means is located on the outside of the insulating wall material of the chimney body in a plan view. Therefore, even if water such as rainwater passes through the connecting means and passes under the tip cover, the water will not seep into the insulating wall material. In addition, there is no need to form a recess in the tip surface of the insulating wall material for the bolt head or nut of the connecting means.

Preferably, the tip cover has an upwardly protruding cover dam portion formed at an end portion thereof on the inside of the chimney.
This allows the cover dam plate portion to block water droplets on the top surface of the tip cover and rainwater that tries to be blown over the tip cover into the chimney, preventing or reducing the amount of water that enters the flue of the chimney body.

Preferably, plate-shaped louvers are provided on the side surfaces of the bellows, and louver dam portions that protrude upward are formed at the ends of the louvers on the inside of the bellows.
This allows the louver dam plate portion to block water droplets on the top surface of the louvers and rainwater that tries to blow over the louvers into the jinkasa, preventing or reducing the amount of water that enters the chimney.
Preferably, a plurality of louvers are provided at intervals above and below on the side of the chimney. Smoke (exhaust gas) emitted from the tip opening of the chimney body passes through the inside of the chimney and is discharged through the gaps between adjacent louvers above and below.

The chimney with a hood according to the present invention can prevent rainwater and other water from seeping down the connecting means into the inside of the insulating wall material of the chimney body. Furthermore, there is no need to form a recess in the tip surface of the insulating wall material for the bolt head or nut of the connecting means.

FIG. 1 shows the upper end portion of a chimney with a bellows according to one embodiment of the present invention, and is a front cross-sectional view taken along line II in FIG. FIG. 2 is a plan cross-sectional view taken along line II-II in FIG. FIG. 3 is an enlarged cross-sectional view of the circle III in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in Figure 1, a building 1, such as a commercial building or a factory, is equipped with a chimney with a hood 3. Exhaust gas from equipment (not shown), such as a boiler or generator, within the building 1 is discharged through a flue 3a within the chimney with hood 3.

As shown in Figure 2, the planar cross-sectional shape of the chimney with hood 3 is quadrangular (rectangular), but the present invention is not limited to this and it may be circular or a polygon other than a quadrangle.

As shown in Figure 1, the chimney with a bell 3 comprises a chimney body 10 and a bell 20. The chimney body 10 includes an insulating wall material 13, an outer wall 14, and an inner wall 15. The insulating wall material 13 is made of a hard insulating material such as calcium silicate. The outer wall 14 is provided on the outer surface of the insulating wall 13. The inner wall 15 is provided on the inner surface of the insulating wall 13. The outer wall 14 and inner wall 15 are made of metal plates such as stainless steel plates.

As shown in Figure 1, the upper portion (tip portion) of the chimney body 10 protrudes from the rooftop floor 2 of the building 1. A tip cover 30 is placed over the tip surface of the chimney body 10. As shown in Figure 2, the tip cover 30 is formed in a square (rectangular) ring or frame shape to match the planar cross-sectional shape of the chimney body 10.

As shown in Figure 3, the tip cover 30 comprises a cover member 31 and a backing plate 32. The cover member 31 includes a cover plate 33, an inner plate 34, and an outer plate 35. The cover plate 33 is formed from a metal plate such as a stainless steel plate into a rectangular frame plate shape that matches the planar shape of the tip of the chimney body 10, and covers the chimney body 10. A backing plate 32 is interposed between the cover plate 33 and the chimney body 10. The backing plate 32 is made of a metal plate such as a stainless steel plate that is thicker than the cover plate 33. The backing plate 32 directly covers the tip surface of the chimney body 10. The cover plate 33 is supported horizontally by the backing plate 32. A gasket 36 is interposed between the cover plate 33 and the backing plate 32.

As shown in Figure 2, the end of the cover plate 33 on the inside of the chimney is positioned so that it roughly overlaps the inner surface of the chimney body 10 in a planar projection. As shown in Figure 3, the middle portion of the inner plate 34 is joined to the end of the cover plate 33 on the inside of the chimney (left side in Figure 3). The inner plate 34 includes a cover dam plate portion 34a above the joint with the cover plate 33, and a hanging portion 34b below the joint. The cover dam plate portion 34a protrudes upward from the cover plate 33. The hanging portion 34b hangs downward from the cover plate 33 and is attached to the inner wall 15.

As shown in Figure 3, the receiving plate 32 and the cover plate 33 each have extending portions 32e, 33e that extend outward beyond the outer wall 14 of the chimney body 10 in a plan view. As shown in Figure 2, the extending portions 32e, 33e extend outward from the entire circumference of the chimney body 10. As shown in Figures 2 and 3, the extending portion 32e of the receiving plate 32 is supported from below by a plurality of reinforcing ribs 37 provided at intervals around the outer periphery of the chimney body 10.

As shown in Figure 3, the extension portion 33e of the cover plate 33 protrudes slightly outward beyond the extension portion 32e of the receiving plate 32. An outer plate 35 hangs down from the end of the extension portion 33e of the cover plate 33 facing the outside of the chimney. The lower end of the outer plate 35 is formed with a return portion 35b that faces inward toward the chimney.

As shown in Figure 1, a bell 20 is provided on the upper side of the chimney body 10. The bell 20 constitutes the smoke exhaust section of the chimney 3. The bell 20 comprises a roof section 21 and multiple supports 22. The roof section 21 is spaced above and covers the tip opening of the chimney body 10 (the upper end of the flue 3a). The roof section 21 is supported by the supports 22.

The support pillar 22 has a vertically extending support pillar body 22a and a bottom plate 22b at its lower end. The support pillar body 22a is made of an L-shaped cross-section angle material. The bottom plate 22b is made of a flat steel plate. The lower end surface of the support pillar body 22a is butted against and welded to the top surface of the bottom plate 22b. The roof section 21 is fixed to the upper end of the support pillar body 22a.

Multiple support columns 22 are spaced apart circumferentially around the annular tip surface of the chimney body 10. Each support column 22 is erected on the extensions 32e, 33e of the tip cover 30. Therefore, the support columns 22 are positioned outside the chimney body 10 in a plan view.

The extension portions 32e, 33e are provided with connection means 40 for connecting to the support 22. The connection means 40 includes a bolt 41 and a nut 42. The bolt 41 passes through the bottom plate 22b of the support 22 and the extension portions 32e, 33e and is secured with the nut 42. The bottom plate 22b, extension portions 32e, 33e, and packing 36 have bolt insertion holes 38 formed therein for passing the bolt 41.

As shown in Figure 1, multiple louvers 23 are provided at intervals vertically on the four side surfaces of the jinbaori 20. Each louver 23 is suspended horizontally across multiple adjacent supports 22.

An L-shaped support member 24 is attached to the support post 22. The louvers 23 are installed on the horizontal piece of the support member 24. This allows the louvers 23 to be supported by the support post 22 via the support member 24.

A horizontal slit-shaped gap 25 is formed between adjacent louvers 23 above and below. The gap 25 serves as a smoke exhaust port.

As shown in Figure 3, the louvers 23 are formed as plates with an L-shaped cross section, each having a horizontal louver plate portion 23a and a vertical louver dam plate portion 23b. The louver plate portion 23a is placed and fixed on a support member 24 so that it protrudes outward from the support 22.

As shown in Figure 3, the louver dam plate portion 23b protrudes upward from the end of the louver plate portion 23a on the inner side of the bellows (the left end in Figure 3).

In the chimney 3 with a bellows, smoke (exhaust gas) that rises in the flue 3a passes from the tip opening of the chimney body 10 through the inside of the bellows 20 and is discharged through the gap 25.
According to the chimney with a bellows cap 3, the connecting means 40 is disposed on the outside of the chimney body 10 in a planar projection view, so even if water such as rainwater passes through the bolt insertion holes 38 or between the threads of the bolts 41 and nuts 42 and passes through to the underside of the tip cover 30, the water will not seep into the inside of the insulating wall material 13 of the chimney body 10. In addition, there is no need to form a recess in the tip surface of the insulating wall material 13 for the bolt head or nut of the connecting means.

When water droplets on the upper surface of the cover plate 33 attempt to flow into the chimney, they can be blocked by the cover dam plate portion 34a. In addition, rainwater that attempts to be blown into the chimney above the cover plate 33 can be blocked by the cover dam plate portion 34a. This makes it possible to prevent or reduce the amount of water that enters the flue 3a.
Even if water gets around the upper end of the cover dam plate portion 34a, the water will flow down along the surface of the inner plate 34 facing the inside of the flue 3a, and will be transferred from the hanging portion 34b to the surface of the inner wall 15 facing the inside of the flue 3a. Therefore, water can be prevented from getting around the underside of the cover plate 33, and can be reliably prevented from seeping into the insulating wall material 13 of the chimney body 10.
In addition, since an outer plate 35 hangs down from the outer end of the cover plate 33, water droplets or rainwater on the upper surface of the cover plate 33 can be prevented from going around the outer end of the cover plate 33 and seeping into the inside of the chimney body 10.

Furthermore, water droplets on the upper surface of the louver plate portion 23a and rainwater attempting to blow into the tumbler 20 through the gap 25 can be blocked by the louver dam plate portion 23b. This prevents or reduces the amount of water from entering the flue 3a from inside the tumbler 20.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.
For example, the means for connecting the lower end of the support 22 to the tip cover 30 is not limited to the bolt 41 and nut 42, but may be a rivet or the like.
The connecting means may be arranged in the extension portion 33e of the tip cover 30, the support body 22a may be arranged in a position overlapping with the chimney body 10 in a planar view, and the bottom plate 22b may extend from the overlapping position to the extension portion 33e.

The present invention can be applied to chimneys with hoods attached to buildings such as commercial buildings and factories.

1 Building 2 Rooftop floor 3 Chimney with hood 3a Flue 10 Chimney body 13 Insulated wall material 14 Exterior wall 15 Interior wall 20 Hood 21 Roof portion 22 Support 22a Support body 22b Bottom plate (lower end of support)
23 Louver 23a Louver plate portion 23b Louver dam plate portion 24 Receiving material 25 Gap 30 Tip cover 31 Cover member 32 Receiving plate 32e Extension portion (extending portion to the outside)
33 Cover plate 33e Extension portion (outward extension portion)
34 Inner plate 34a Cover dam plate portion 34b Hanging portion 35 Outer plate 35b Return portion 36 Packing 37 Reinforcement rib 38 Bolt insertion hole 40 Connecting means 41 Bolt 42 Nut

Claims (3)

A chimney with a chimney cap, which constitutes a smoke exhaust section, is provided at the tip of a chimney body including a heat insulating wall material,
A ring-shaped tip cover is placed on the tip surface of the chimney body, a support pillar supporting the roof of the chimney is erected on the tip cover, the lower end of the support pillar and the tip cover are connected by a connecting means, the tip cover comprises a cover member, a packing, and a backing plate that is thicker than the cover member, the tip surface of the chimney body is covered with the backing plate, and the cover member is placed on the upper surface of the backing plate via the packing,
A chimney with a hood, characterized in that the support plate and cover member of the tip cover extend outward from the chimney body including the insulating wall material, and the connecting means is arranged on the outward extending portion. A chimney with a chimney cap as described in claim 1, characterized in that the end of the tip cover on the inside of the chimney is formed with a cover dam portion that protrudes upward. A chimney with a hood as described in claim 1 or 2, characterized in that plate-shaped louvers are provided on the side portions of the hood, and louver dam portions that protrude upward are formed at the ends of the louvers on the inside of the hood.