JP2022057672A - Chimney for building - Google Patents

Abstract

To prevent a component material for a blanket from scattering from a blanket-shaped heat insulation material of a telescopic joint part of a chimney for a building.SOLUTION: A plurality of cylindrical chimney units 10 are set in a row in a chimney axial direction and supported on a building 1. An annular telescopic joint part 20 is laid between two chimney units 11, 12 neighboring each other in a mutually approachable/separable manner. The telescopic joint part 20 includes a soft heat insulation material 21, a telescopic outer periphery cover 22, and an inner periphery sleeve 23. The heat insulation material 21 has a plurality of mat-shaped heat insulation members 21a arranged annularly in the peripheral direction of the telescopic joint part 20. Each heat insulation member has a blanket-shaped soft heat insulation material body 50, and a bag 52 for wrapping it.SELECTED DRAWING: Figure 2

Description

The present invention relates to a chimney attached to a building, and more particularly to a chimney for a building which has a telescopic joint and can be expanded and contracted.

Generally, a chimney for discharging exhaust gas is provided inside or on the outer wall of a building where a boiler, a generator, or the like is located. Usually, this type of chimney is composed of a plurality of tubular chimney units. A flue is formed by arranging these chimney units in a row (see Patent Document 1 and the like).

Japanese Patent No. 5798676

Two adjacent chimney units at a predetermined location of this type of chimney can be brought close to each other and separated from each other, and an expansion joint portion is provided between the two chimney units. When the chimney expands or contracts due to heat or shakes due to an earthquake, the two chimney units are brought close to each other and the expansion joint portion is expanded and contracted so that deformation (interlayer deformation) can be followed.

The telescopic joint includes a heat insulating material and a stretchable outer peripheral cover. The heat insulating material is composed of, for example, a ceramic blanket or other blanket-like flexible heat insulating material. The flexibility of the insulation allows for relative displacement between the two chimney units.

On the other hand, in this type of blanket-shaped heat insulating material, the constituent material of the blanket becomes fine powder or fibrous and easily scatters, and easily adheres to the inner surface of the chimney or the like.
In view of such circumstances, it is an object of the present invention to prevent the constituent material of the blanket from scattering from the blanket-shaped heat insulating material in the expansion joint portion of the chimney for a building.

In order to solve the above problems, the present invention is a chimney attached to a building.
A plurality of tubular chimney units supported by the building and connected in the chimney axis direction,
An annular expansion joint portion interposed between two chimney units adjacent to each other so as to be close to each other among the plurality of chimney units,
The expansion joint portion is provided with
A flexible heat insulating material provided to fill the space between the two chimney units and the space between the two chimney units.
A stretchable outer peripheral cover that covers the outer circumference of the heat insulating material, and
Includes an inner sleeve that covers the inner circumference of the heat insulating material.
The heat insulating material is composed of a plurality of mat-shaped heat insulating members arranged in an annular shape in the circumferential direction of the expansion joint portion, and each heat insulating member has a blanket-shaped flexible heat insulating material main body and the heat insulating material main body. It is characterized by having a heat-insulating bag body to wrap.

According to the building chimney, by wrapping the blanket-shaped heat insulating material main body with a bag body, even if the blanket constituent material is separated from the heat insulating material main body, it is prevented from scattering to the outside of the heat insulating material. By dividing the annular heat insulating material into a plurality of heat insulating members, each heat insulating member becomes a mat shape, so that the heat insulating material main body can be easily wrapped by the bag body.

It is preferable that the bag body is made of glass cloth. As a result, the heat insulating property can be ensured, and the generation of scattered matter from the blanket-shaped heat insulating material main body can be surely prevented.

It is preferable that the set length of each heat insulating member in the chimney axis direction is larger than the specified length of the space between the units in the chimney axis direction. The set length refers to the length in the chimney axis direction of the heat insulating member in the default state where it does not expand or contract at the time of designing or immediately after manufacturing. The specified length refers to the length of the space between the two chimney units in the chimney axis direction in a neutral state in which the two chimney units are not approaching or separating from each other due to heat or external force at the time of designing the chimney or after operation. As a result, the heat insulating member is compressed and arranged between the two chimney units. Therefore, regardless of the relative displacement of the two chimney units, the formation of a gap between each chimney unit and the heat insulating member is suppressed.

According to the present invention, it is possible to prevent the blanket constituent material from scattering from the heat insulating material main body of the expansion joint portion in the chimney for a building.

FIG. 1 is an explanatory front view of a high-rise part of a building including a chimney according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view showing the circle portion II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. FIG. 4 is a perspective view of the heat insulating member appearing in FIG. FIG. 5 is an explanatory cross-sectional view showing an installation operation of the heat insulating member. FIG. 6 is an enlarged cross-sectional view of the circular portion VI of FIG. FIG. 7 is an enlarged cross-sectional view of the circular portion VII of FIG. FIG. 8A is a cross-sectional view showing a state in which the chimney units on both sides are close to each other with the expansion joint portion interposed therebetween. FIG. 8B is a cross-sectional view showing a neutral state between the chimney units. FIG. 8C is a cross-sectional view showing a state in which the chimney units are separated from each other.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a building 1 such as a high-rise building. The building 1 is provided with a chimney 3 for discharging smoke from a boiler, a generator, or the like. The flue of the chimney 3 of the present embodiment and thus the chimney axis direction is bent. That is, the chimney 3 has a vertical chimney portion 3a extending vertically from the lower part of the building 1 to the rooftop floor 1ph, a traversing portion 3b extending horizontally on the rooftop floor 1ph, a rising portion 3c rising from the traversing portion 3b, and a rising portion 3c. It has a chimney opening 3d at the top of the roof.

As shown in FIG. 1, the chimney 3 includes a plurality of chimney units 10 constituting a flue and joint portions 14 and 20. Each chimney unit 10 has, for example, a cylindrical shape having a quadrangular cross section. A flue is formed by connecting a plurality of chimney units 10 in the direction of the chimney axis. Adjacent chimney units 10 are connected to each other via a joint portion 14. Each chimney unit 10 of the vertical chimney portion 3a is supported by the skeleton 1a of the building 1 via the support bracket 13. Each chimney unit 10 of the traversing portion 3b on the rooftop floor 1ph is suspended and supported by a suspension frame 15.

Of the chimney units 10, two predetermined adjacent chimney units 11 and 12 in the traverse portion 3b (predetermined location) can be brought close to each other and separated from each other. A telescopic joint portion 20 is interposed between the two chimney units 11 and 12 in place of the joint portion 14.

As shown in FIGS. 8A to 8B, the expansion / contraction joint portion 20 can be expanded / contracted in the chimney axis direction (left and right in FIG. 2). As shown in FIG. 3, the overall cross-sectional shape of the expansion joint portion 20 is a quadrangular cylindrical shape (annular shape) that matches the cross-sectional shape of the chimney unit 10.

Specifically, as shown in FIG. 2, the telescopic joint portion 20 includes a heat insulating material 21, an outer peripheral cover 22, and an inner peripheral sleeve 23. As shown in FIG. 3, the heat insulating material 21 has four (plural) heat insulating members 21a. As shown in FIG. 4, each heat insulating member 21a is formed in a rectangular mat shape (thick plate shape). The vertical and horizontal dimensions of the heat insulating member 21a correspond to the vertical and horizontal dimensions of each of the four side surfaces of the expansion joint portion 20. As shown in FIG. 4, four heat insulating members 21a are arranged so as to form a square annular shape in the circumferential direction of the expansion joint portion 20. As shown in FIGS. 6 and 7, each heat insulating member 21a has a heat insulating material main body 50 and a bag body 52. The heat insulating material main body 50 is made of a blanket-like flexible heat insulating material such as a ceramic blanket. The entire heat insulating material main body 50 is wrapped by the bag body 52. The bag body 52 is formed by forming a cloth-like or sheet-like heat insulating material in a bag shape, and has heat insulating properties. Preferably, the material of the bag 52 is glass cloth.

As shown in FIG. 2, the heat insulating material 21 of the expansion joint portion 20 fills the space 19 between the two chimney units 11 and 12. As shown in FIG. 5, strictly speaking, the space between units 19 refers to the space formed between the facing surfaces of the flanges 34 of the pair of inner peripheral sleeve members 31 and 32 described later.
As shown in FIG. 5, the set length L ₂₁ of each heat insulating member 21a and thus the heat insulating material 21 is larger than the specified length L ₁₉ of the space between units 19 (L ₂₁ > L ₁₉ ). Preferably, the set length L ₂₁ is the length of the telescopic joint when extended. If the set length L ₂₁ is insufficient, a gap may be created between the chimney units 11 and 12 and the heat insulating material 21. If the set length L ₂₁ is too large, it becomes difficult to fit the heat insulating member 21a and thus the heat insulating material 21 between the chimney units 11 and 12.

As shown in FIG. 2, the outer periphery of the heat insulating material 21 is covered with the outer peripheral cover 22. The outer peripheral cover 22 has bellows portions 22a on both sides and an intermediate tubular portion 22c sandwiched between the bellows portions 22a. The bellows portion 22a can be expanded and contracted in the chimney axis direction (left and right in FIG. 2). As a result, the outer peripheral cover 22 can be expanded and contracted in the direction of the chimney axis. The material of the bellows portion 22a and the intermediate cylinder portion 22c is a metal such as stainless steel. The outer peripheral cover 22 is bridged between the two chimney units 11 and 12. Both ends of the outer peripheral cover 22 are bolted to the corresponding chimney units 11 and 12 via a square annular end frame 24 each having an L-shaped cross section. A packing 25 is provided between the chimney units 11 and 12 and the end frame 24.

The inner circumference of the heat insulating material 21 is covered with the inner circumference sleeve 23. The inner peripheral sleeve 23 includes a pair of inner peripheral sleeve members 31, 32. The material of the inner peripheral sleeve members 31 and 32 is a metal such as stainless steel. The inner peripheral sleeve members 31 and 32 are projected from the facing ends of the two chimney units 11 and 12 along the inner circumference of the heat insulating material 21, respectively.

Specifically, as shown in FIG. 2, the first inner peripheral sleeve member 31 is arranged on the side of the first chimney unit 11 with the central portion of the expansion joint portion 20 in the chimney axis direction interposed therebetween, and the second chimney unit. A second inner peripheral sleeve member 32 is arranged on the 12 side. Each inner peripheral sleeve member 31 and 32 has an inner peripheral sleeve portion 33 and a flange portion 34. The inner peripheral sleeve portion 33 and thus the inner peripheral sleeve members 31 and 32 are formed in a square cylindrical shape (annular shape) over the entire circumference of the telescopic joint portion 20. The flange portion 34 is bent at a right angle from the end portion of the inner peripheral sleeve portion 33 and protrudes outward.

As shown in FIG. 2, the inner peripheral sleeve portion 33 of the inner peripheral sleeve member 31 covers the inner peripheral portion of about half of the inner peripheral surface of the heat insulating material 21 on the chimney unit 11 side with respect to the central portion in the chimney axial direction. There is. Further, the inner peripheral sleeve portion 33 of the inner peripheral sleeve member 32 covers the inner peripheral portion of about half of the inner peripheral surface of the heat insulating material 21 on the chimney unit 12 side with respect to the central portion in the chimney axis direction. As shown in FIG. 7, the flange portions 34 of the inner peripheral sleeve members 31 and 32 cover the corresponding end faces of the heat insulating material 21, and the outer end portions are abutted against the end frame 24 and the end frame 24 is welded or the like. It is joined with. As shown in FIG. 2, the inner peripheral sleeve members 31 and 32 are joined to the corresponding chimney units 11 and 12 via the end frame 24.
The heat insulating material 21 is held from the inside of the chimney by the inner peripheral sleeve 23, and the heat insulating material 21 is prevented from falling off to the inside of the chimney.

As shown in FIG. 6, the tip portions of the inner peripheral sleeve members 31 and 32 facing each other face each other at a distance and are inclined inward toward the other side of the chimney so that the inner inclined ends are inclined. It is 35. As shown in FIG. 3, the inner inclined end 35 has an annular shape over the entire circumference of the tips of the inner peripheral sleeve members 31 and 32.

As shown in FIG. 2, a plurality of locking pins 40 are provided at the facing ends of the two chimney units 11 and 12, respectively, via connecting means. Specifically, the locking pin 40 is provided near the base end portion (end portion on the flange portion 34 side) of the inner peripheral sleeve portion 34 in each inner peripheral sleeve member 31 and 32. Inner peripheral sleeve members 31, 32 are provided as the connecting means. As shown in FIG. 5, a nut 42 is fixed to the inner surface of the inner peripheral sleeve portion 34 by welding or the like.

As shown in FIG. 7, the locking pin 40 is composed of a bolt having a sharp tip. The locking pin 40 is oriented so as to be orthogonal (crossed) to the chimney axis direction, is screwed into the nut 42, penetrates the inner peripheral sleeve portion 34, and is pierced into the heat insulating material 21. Specifically, the locking pin 40 penetrates the bag body 52 of the heat insulating material 21 and pierces the heat insulating material main body 50.

As shown in FIGS. 2 and 3, a plurality of locking pins 40 and nuts 42 are arranged at intervals in the circumferential direction of the inner peripheral sleeve members 31 and 32. Each locking pin 40 is pierced into the heat insulating material 21 and locked. Therefore, both ends of the flexible heat insulating material 21 in the chimney axis direction are constrained to the corresponding chimney unit 10 via the locking pin 40 and the inner peripheral sleeve 23, respectively.

According to the building chimney 3, when the chimney 3 expands due to the heat of the exhaust gas passing through the flue, contracts due to heat dissipation, or shakes due to an earthquake, as shown in FIGS. The chimney units 11 and 12 are brought closer to each other and the expansion / contraction joint portion 20 is expanded / contracted so that deformation (interlayer deformation) can be followed.
As shown in FIG. 8A, when the chimney units 11 and 12 are brought close to each other, the heat insulating material 21 is pushed by the chimney units 11 and 12 and is compressed and deformed. As shown in FIG. 8 (c), when the chimney units 11 and 12 are separated from each other, both ends of the heat insulating material 21 restrained by the locking pin 40 are respectively connected to the chimney unit 11 and 12 via the locking pin 40. By being pulled by 12, the heat insulating material 21 is stretched and deformed. As a result, it is possible to prevent a large gap from being formed between the end portion of the heat insulating material 21 and the chimney unit 10.

When the chimney units 11 and 12 are brought close to each other, the inner peripheral sleeve members 31 and 32 are slid so as to be brought close to each other along the inner peripheral surface of the heat insulating material 21. Since the tips of the inner peripheral sleeve members 31 and 32 are the inner inclined ends 35, they are less likely to be caught by the heat insulating material 21 even during the sliding. In particular, even when the chimney units 11 and 12 are approached to each other and the inner peripheral sleeve members 31 and 32 are approached to each other, the tip end portion (inner inclined end 35) of the inner peripheral sleeve members 31 and 32 is caught by the heat insulating material 21. Hateful. Therefore, it is possible to prevent damage to the heat insulating material 21 and deterioration of the expansion / contraction operation of the expansion / contraction joint portion 20 due to catching.
Since the inner inclined end 35 is an annular shape over the entire circumference of the tips of the inner peripheral sleeve members 31 and 32, it is possible to prevent the heat insulating material 21 from being caught on the entire circumference of the telescopic joint portion 20.

According to the building chimney 3, by wrapping the blanket-shaped heat insulating material main body 50 with the bag body 52, even if the blanket constituent material is separated from the heat insulating material main body 50, it is prevented from scattering to the outside of the heat insulating material 21. .. By forming the bag body 52 with a glass cloth, it is possible to secure heat insulating properties and surely prevent the generation of scattered substances from the heat insulating material main body 50.
Since each heat insulating member 21a of the heat insulating material 21 has a rectangular mat shape, it is easy to wrap the heat insulating material main body 50 of the heat insulating member 21a with the bag body 52.
By making the set length L ₂₁ of each heat insulating member 21a larger than the specified length L ₁₉ of the space between units 19 (FIG. 5), the heat insulating member 21a is compressed between the two chimney units 11 and 12. Be placed. As a result, even when the chimney units 11 and 12 are separated from each other, it is possible to prevent the formation of a gap between each chimney unit 10 and the heat insulating member 21a.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the expansion joint portion 20 may be arranged in the vertical chimney portion 3a. The chimney 3 may be composed of only the vertical chimney portion 3a without the traversing portion 3b.

The present invention can be applied to, for example, a chimney provided along the interior or outer wall of a building.

1 Building 3 Chimney for building 3b Traverse part (predetermined location)
10 Chimney units 11, 12 Two chimney units 19 Space between units L ₁₉ Specified length 20 Telescopic joint 21 Insulation material 21a Insulation member L ₂₁ Set length 22 Outer cover 22a Bellows 22c Intermediate cylinder 23 Inner circumference sleeve 31, 32 Inner circumference sleeve member (connecting means)
33 Inner circumference sleeve part 34 Flange part 35 Inner inclined end 40 Locking pin 50 Insulation material body 52 Bag body

Claims (3)

A chimney attached to a building
A plurality of tubular chimney units supported by the building and connected in the chimney axis direction,
An annular expansion joint portion interposed between two chimney units adjacent to each other so as to be close to each other among the plurality of chimney units,
The expansion joint portion is provided with
A flexible heat insulating material provided to fill the space between the two chimney units and the space between the two chimney units.
A stretchable outer peripheral cover that covers the outer circumference of the heat insulating material, and
Includes an inner sleeve that covers the inner circumference of the heat insulating material.
The heat insulating material is composed of a plurality of mat-shaped heat insulating members arranged in an annular shape in the circumferential direction of the expansion joint portion, and each heat insulating member has a blanket-shaped flexible heat insulating material main body and the heat insulating material main body. A building chimney characterized by having an insulating bag to wrap around. The building chimney according to claim 1, wherein the bag body is made of a glass cloth. The building chimney according to claim 1 or 2, wherein the set length of each heat insulating member in the chimney axis direction is larger than the specified length of the space between the units in the chimney axis direction.

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