JP3530608B2 - Air conditioning and smoke exhaust ducts - Google Patents
Air conditioning and smoke exhaust ductsInfo
- Publication number
- JP3530608B2 JP3530608B2 JP33454894A JP33454894A JP3530608B2 JP 3530608 B2 JP3530608 B2 JP 3530608B2 JP 33454894 A JP33454894 A JP 33454894A JP 33454894 A JP33454894 A JP 33454894A JP 3530608 B2 JP3530608 B2 JP 3530608B2
- Authority
- JP
- Japan
- Prior art keywords
- duct
- thin film
- gaskets
- binder
- seam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Duct Arrangements (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Paints Or Removers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は建造物等に設備される空
調および排煙用ダクトに係り、詳細には、継目フランジ
を備え、この継目フランジ間にガスケットを挟着して組
み立てられ、ダクトからのガス漏れを防止する空調およ
び排煙用ダクトに係り、特に火災時において断熱性およ
び遮断性を発揮する空調および排煙用ダクトに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-conditioning and smoke-exhausting duct installed in a building or the like, and more particularly, to a duct provided with joint flanges and having gaskets sandwiched between the joint flanges. The present invention relates to an air conditioning and smoke exhaust duct that prevents gas leakage from the air conditioner, and more particularly to an air conditioning and smoke exhaust duct that exhibits heat insulation and blocking properties in the event of a fire.
【０００２】[0002]
【従来の技術】建造物等に設備される空調および排煙用
ダクトは通常、図１に示されるように、継目フランジ１
を備えたパーツ２を該フランジ１部分でガスケット３を
介して互いに連結することにより組み立てられ、フラン
ジ部からの空気漏れを防ぐことを目的としている。この
種のガスケットは火災時に不燃性を有することが必要で
ある。2. Description of the Related Art An air-conditioning and smoke-exhausting duct installed in a building or the like generally has a joint flange 1 as shown in FIG.
The parts 2 provided with are assembled by connecting the parts of the flange 1 to each other via the gasket 3, and the purpose is to prevent air leakage from the flange part. Gaskets of this kind must be non-flammable in the event of a fire.
【０００３】上述のダクトに用いられるガスケットとし
て従来、クロロプレンゴムスポンジ、ポリ塩化ビニル樹
脂スポンジ等の有機系材料からなるもの、ロックウール
フエルト、バルキー化工されたガラス繊維等の無機系材
料からなるもの等が知られている。Conventionally, gaskets used for the above ducts are made of organic materials such as chloroprene rubber sponge and polyvinyl chloride resin sponge, those made of inorganic materials such as rock wool felt and bulky modified glass fiber. It has been known.
【０００４】[0004]
【発明が解決しようとする問題点】しかし、前者の有機
系材料からなるガスケットでは、不燃性を有していると
は言えず、また、後者の無機系材料からなるガスケット
では、不燃性を有しているものの、高価であるのみなら
ず、特に火災時における断熱性や遮断性については必ず
しも充分とは言えない。However, it cannot be said that the former gasket made of an organic material has nonflammability, and the latter gasket made of an inorganic material has nonflammability. However, not only is it expensive, but it is not always sufficient in terms of heat insulation and insulation, especially in the event of a fire.
【０００５】そこで、本発明の目的は継目フランジを備
え、この継目フランジ間にフランジ部分からの空気漏れ
を防ぐ目的でガスケットを挟着して組み立てられる空調
および排煙用ダクトにおいて、特に火災時において断熱
性および遮断性を発揮し、前述の公知技術に存する欠点
を改良した空調および排煙用ダクトを提供することにあ
る。Therefore, an object of the present invention is to provide an air-conditioning and smoke-exhausting duct which is equipped with joint flanges and is assembled by sandwiching gaskets for the purpose of preventing air leakage from the flange portions between the joint flanges, especially in the event of a fire. It is an object of the present invention to provide an air-conditioning and smoke-exhausting duct that exhibits heat insulating properties and insulation properties and that has improved the above-mentioned drawbacks of the known art.
【０００６】[0006]
【問題点を解決するための手段】前述の目的を達成する
ため、本発明によれば、継目フランジを備え、この継目
フランジ間にガスケットを挟着して組み立てられる空調
および排煙用ダクトにおいて、前記ガスケットの少なく
とも一方の面に、および／または前記継目フランジの少
なくとも一方の接合面に被覆材を形成してなり、この被
覆材として、高温で発泡炭化物の断熱層を形成する耐火
薄膜を用いることを特徴する。In order to achieve the above-mentioned object, according to the present invention, in an air-conditioning and smoke-exhausting duct which is provided with seam flanges and is assembled by sandwiching a gasket between the seam flanges, A coating material is formed on at least one surface of the gasket and / or a joint surface of at least one of the joint flanges, and as the coating material, a fireproof thin film forming a heat insulating layer of expanded carbide at high temperature is used. Characterize
【０００７】[0007]
【発明の具体的説明】以下、本発明を添付図面を用いて
詳述すると、図１は本発明にかかるダクトの分解斜視図
であり、図２は組み立ての終了した本発明にかかるダク
トの完成斜視図であり、図３は図２におけるフランジ部
分の断面図である。DETAILED DESCRIPTION OF THE INVENTION The present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a duct according to the present invention, and FIG. 2 is a completed duct according to the present invention after assembly. FIG. 3 is a perspective view, and FIG. 3 is a sectional view of a flange portion in FIG. 2.
【０００８】図１に示されるように本発明にかかるダク
ト５は継目フランジ１、１を備え、この継目フランジ間
にガスケット３を挟着して組み立てられる。これを詳述
すると、ガスケット３はパーツ２、２…２の対向する継
目フランジ１、１間に配置され、具体的には図示しない
が、いずれか一方の継目フランジ１面に貼り付けること
により配置され、次いで、図２に示されるように、対向
する両フランジ１、１を合わせ、押さえ金具４によって
両フランジ１、１を連結することにより、パーツ２、２
…２が連結され、ダクト５が組み立てられる。このと
き、ガスケット３は図３に示されるように、継目フラン
ジ１、１間に挟着されている。As shown in FIG. 1, the duct 5 according to the present invention includes seam flanges 1 and 1, and a gasket 3 is sandwiched between the seam flanges to assemble the duct. More specifically, the gasket 3 is arranged between the facing seam flanges 1 and 1 of the parts 2, 2 ... 2 and, although not specifically shown, it is arranged by being attached to one of the seam flanges 1 surface. Then, as shown in FIG. 2, the flanges 1 and 1 facing each other are aligned, and the flanges 1 and 1 are connected by a holding metal fitting 4 to form the parts 2 and 2.
... 2 are connected and the duct 5 is assembled. At this time, the gasket 3 is sandwiched between the joint flanges 1 and 1 as shown in FIG.
【０００９】上述のガスケット３はクロロプレンゴムス
ポンジ、ポリ塩化ビニル樹脂スポンジ等の有機系材料を
基材とするが、この有機系材料に限らず、ロックウール
フエルト、バルキー化工されたガラス繊維等の無機系材
料であってもかまわない。The above-mentioned gasket 3 is made of an organic material such as chloroprene rubber sponge and polyvinyl chloride resin sponge, but is not limited to this organic material, but is also an inorganic material such as rock wool felt and bulky glass fiber. It may be a system material.
【００１０】本発明はガスケット３の一方の面３ａ、ま
たは両方の面３ａ、３ａ、および／または継目フランジ
１、１の一方の接合面１ａ、または両方の接合面１ａ、
１ａに被覆材６を形成することを特徴とする。図３はガ
スケットの一方の面３ａ、またはフランジ１の一方の接
合面１ａに被覆材６を形成した例の断面図である。According to the invention, one face 3a of the gasket 3 or both faces 3a, 3a and / or one joint face 1a of the seam flange 1, 1 or both joint faces 1a,
The coating material 6 is formed on 1a. FIG. 3 is a cross-sectional view of an example in which the coating material 6 is formed on one surface 3a of the gasket or one joint surface 1a of the flange 1.
【００１１】前述の被覆材６は炭化層形成材と、リン酸
系化合物と、発泡剤と、結合材とを主成分として含む厚
さ数mm程度あるいはそれ以下の耐火薄膜である。これら
各成分を詳述すると、次のとおりである。The above-mentioned coating material 6 is a fireproof thin film containing a carbonized layer forming material, a phosphoric acid compound, a foaming agent, and a binder as main components and having a thickness of about several mm or less. The details of each of these components are as follows.
【００１２】炭化層形成材は燃焼時に多量の炭素を生成
して断熱効果を呈する物質であって、具体的にはでんぷ
ん、デキストリン、多糖類（グリコース類）等の炭水化
物類、モノペンタエリスリトール、ジペンタエリスリト
ール等の多官能アルコール、尿素樹脂、メラミン樹脂、
ポリ酢酸ビニル樹脂、ポリウレタン樹脂、エポキシ樹
脂、フエノール樹脂等の樹脂状物質であって、本発明で
はこれらを単独で、あるいは複数種を組み合わせて使用
される。The carbonized layer forming material is a substance which produces a large amount of carbon during combustion and exhibits an adiabatic effect, and specifically, starches, dextrins, carbohydrates such as polysaccharides (glycoses), monopentaerythritol, diester. Polyfunctional alcohol such as pentaerythritol, urea resin, melamine resin,
Resinous substances such as polyvinyl acetate resin, polyurethane resin, epoxy resin, and phenol resin, which are used alone or in combination in the present invention.
【００１３】リン酸系化合物は上述炭化層形成材と混合
され、これら物質と脱水反応を起こして炭化を促進する
反応触媒物質であって、具体的には、リン酸アンモニウ
ム、ポリリン酸アンモニウム、リン酸メラミン、ポリリ
ン酸アミド等が挙げられる。本発明では、これらを単独
で、あるいは複数種を組み合わせて使用される。The phosphoric acid-based compound is a reaction catalyst substance that is mixed with the above-mentioned carbonized layer forming material and causes a dehydration reaction with these substances to promote carbonization. Specifically, ammonium phosphate, ammonium polyphosphate, phosphorus Examples thereof include acid melamine and polyphosphoric acid amide. In the present invention, these may be used alone or in combination of two or more.
【００１４】発泡剤は熱分解を受けてアンモニアガス
等、不燃性ガスを放出し、前記炭化層形成材が高温で溶
融状態となったときにこれを膨張し、発泡せしめる物質
であって、例えば、リン酸アンモニウム、ポリリン酸ア
ンモニウム、メラミン、ジシアンジアミド、グアニジ
ン、尿素等が挙げられ、本発明ではこれらを単独で、ま
たは複数種を組み合わせて使用される。The foaming agent is a substance which is thermally decomposed to release a non-combustible gas such as ammonia gas, which expands and foams when the carbonized layer forming material is in a molten state at a high temperature. , Ammonium phosphate, ammonium polyphosphate, melamine, dicyandiamide, guanidine, urea and the like. In the present invention, these are used alone or in combination of two or more.
【００１５】結合材は塗膜を形成するためのバインダー
であって、水系または溶剤系樹脂が挙げられる。具体的
には、水系としてはポリメチルアクリレート、ポリエチ
ルアクリレート、ポリブチルアクリレート、ポリイソブ
チルアクリレート、ポリオクチルアクリレート、ポリ２
エチルヘキシルアクリレート等のアクリル系樹脂エマル
ジョン、エチレン・酢ビ共重合物等のエチレン・酢ビ系
樹脂エマルジョン等である。また、溶剤系としてはアル
キッド樹脂、ポリ塩化ビニル樹脂、ポリウレタン樹脂、
エポキシ樹脂等である。この溶剤としてはホワイトスピ
リット系溶剤が用いられる。本発明では、これらの水系
または溶剤系のものをそれぞれ単独あるいは複数種を組
み合わせて用いられる。The binder is a binder for forming a coating film, and may be a water-based or solvent-based resin. Specifically, water-based polymethyl acrylate, polyethyl acrylate, polybutyl acrylate, polyisobutyl acrylate, polyoctyl acrylate, poly-2
Examples thereof include acrylic resin emulsions such as ethylhexyl acrylate and ethylene / vinyl acetate resin emulsions such as ethylene / vinyl acetate copolymers. Also, as solvent system, alkyd resin, polyvinyl chloride resin, polyurethane resin,
An epoxy resin or the like. A white spirit type solvent is used as this solvent. In the present invention, these water-based or solvent-based materials may be used alone or in combination.
【００１６】耐火薄膜の上述各成分の好ましい配合量は
炭化層形成材５〜15重量部、リン酸系化合物25〜35重量
部、発泡剤５〜15重量部、結合材15〜25重量部である。The preferred blending amount of each of the above-mentioned components of the fire resistant thin film is 5 to 15 parts by weight of the carbonized layer forming material, 25 to 35 parts by weight of the phosphoric acid compound, 5 to 15 parts by weight of the foaming agent, and 15 to 25 parts by weight of the binder. is there.
【００１７】なお、耐火薄膜は上述の成分のほかに、さ
らに、水酸化アルミニウムを適当量含有することもでき
る。この水酸化アルミニウムは上述発泡材の補助物質と
して有効であり、さらには気化熱を吸収して耐火薄膜の
温度が必要以上に上昇するのを防止するものである。さ
らに、本発明の耐火薄膜はシリカ、アルミナ、炭酸カル
シウム、ケイ酸カルシウム等の不活性充填材を任意量、
好ましくは炭化層形成材とほぼ同量含むこともできる。The refractory thin film may further contain an appropriate amount of aluminum hydroxide in addition to the above components. This aluminum hydroxide is effective as an auxiliary substance for the above-mentioned foaming material, and also absorbs heat of vaporization to prevent the temperature of the refractory thin film from rising more than necessary. Furthermore, the refractory thin film of the present invention contains silica, alumina, calcium carbonate, calcium silicate or the like in an arbitrary amount of an inert filler,
Preferably, it may be contained in substantially the same amount as the carbonized layer forming material.
【００１８】上述の各成分は結合材が水系の場合には適
当量の水と混合され、また、結合材が溶剤の場合には適
当量の溶剤と混合され、固形分量50〜70％の混合液とし
て調整される。この混合液は例えば吹付塗装等により、
ガスケット面３ａや、接合面１ａに１回または複数回に
わたって塗布され、乾燥の後、所望の厚さ、例えば数mm
あるいはそれ以下の厚さの被覆材（耐火薄膜）６をガス
ケット面３ａあるいは接合面１ａ上に形成する。Each of the above components is mixed with an appropriate amount of water when the binder is water-based, and with an appropriate amount of solvent when the binder is a solvent, and mixed with a solid content of 50 to 70%. Prepared as a liquid. This mixed solution is, for example, spray coated,
It is applied to the gasket surface 3a and the joining surface 1a one or more times, and after drying, it has a desired thickness, for example, several mm.
Alternatively, a coating material (fireproof thin film) 6 having a thickness less than that is formed on the gasket surface 3a or the joint surface 1a.
【００１９】[0019]
【作用】上述の構成からなる本発明にかかるダクト５は
継目フランジ１、１間にガスケット３が挟着された状態
で火災等の高温中に置かれると、被覆材（耐火薄膜）６
が２50〜３00℃の温度で激しく発泡し、さらにこれより
も高い温度、例えば９00℃程度の温度で炭化して発泡炭
化物の断熱層を形成する。このため、フランジ１、１間
のすき間を補って遮断性を完全にし、すき間からの煙の
もれを完全に防止すると同時に、ダクトの外側から内側
への煙や火の侵入をも防止する。When the duct 5 according to the present invention having the above-mentioned structure is placed in a high temperature such as a fire with the gasket 3 sandwiched between the joint flanges 1 and 1, the covering material (fireproof thin film) 6
Violently foams at a temperature of 250 to 300 ° C, and is further carbonized at a temperature higher than this, for example, a temperature of about 900 ° C to form a heat insulating layer of a foamed carbide. Therefore, the gap between the flanges 1 and 1 is supplemented to complete the barrier property, so that the leakage of smoke from the gap is completely prevented, and at the same time, the entry of smoke or fire from the outside to the inside of the duct is prevented.
【００２０】以下、本発明を実施例によって、さらに詳
細に説明するが、本発明はこの実施例によって技術範囲
が限定されるものではない。Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the technical scope by the examples.
【００２１】実施例１
（Ａ）混合液の調製
でんぷん、尿素樹脂粉末およびジペンタエリスリトール
を重量比でそれぞれ２：１：１の割合で配合した炭化層
形成材10重量部と、リン酸系化合物としてのポリリン酸
アンモニウム30重量部と、リン酸アンモニウムおよびジ
シアンジアミンを重量比でそれぞれ、１：１の割合で配
合した発泡剤10重量部と、結合剤としてのエチレン・酢
ビ共重合物20重量部と、水酸化アルミニウム10重量部
と、不活性充填剤としての炭酸カルシウム10重量部と、
水40重量部とを攪拌機を備えた混合器内で充分に攪拌
し、混合液を調製した。Example 1 (A) Preparation of mixed solution 10 parts by weight of a carbonized layer forming material in which starch, urea resin powder and dipentaerythritol were mixed in a weight ratio of 2: 1: 1, and a phosphoric acid compound 30 parts by weight of ammonium polyphosphate as a base, 10 parts by weight of a foaming agent containing ammonium phosphate and dicyandiamine in a weight ratio of 1: 1 respectively, and an ethylene / vinyl acetate copolymer as a binder 20 Parts by weight, 10 parts by weight of aluminum hydroxide, 10 parts by weight of calcium carbonate as an inert filler,
40 parts by weight of water was sufficiently stirred in a mixer equipped with a stirrer to prepare a mixed solution.
【００２２】（Ｂ）耐火薄膜の形成
得られた上述の混合液を図３に示される本発明にかかる
ダクトの継目フランジ１の接合面１ａに吹付塗装により
一回塗布し、自然乾燥させて被覆材６としての厚さ１.2
〜１.5mmの耐火薄膜を形成した。(B) Formation of fire-resistant thin film The above-obtained mixed solution is applied once to the joint surface 1a of the joint flange 1 of the duct according to the present invention shown in FIG. 3 by spray coating, and naturally dried to cover. Thickness as material 6 1.2
A fireproof thin film of ~ 1.5 mm was formed.
【００２３】（Ｃ）耐火試験
上述の耐火薄膜について、ＪＩＳＡ１３０４の耐火試験
方法に準拠して耐火試験を行った。すなわち、この耐火
薄膜を常温から５分後に２50℃〜３00℃、10分後に約７
00℃、30分後に約８50℃、60分後に約９30℃の温度に連
続して加熱した。(C) Fire Resistance Test The above fire resistant thin film was subjected to a fire resistance test in accordance with the fire resistance test method of JIS A1304. That is, this refractory thin film was heated to 250 ° C to 300 ° C for 5 minutes from room temperature, and about 7 minutes after 10 minutes
It was continuously heated to a temperature of about 850 ° C. after 30 minutes at 00 ° C. and about 930 ° C. after 60 minutes.
【００２４】すると、耐火薄膜は加熱開始から５分後、
すなわち、２50〜３00℃の温度のときに、激しく発泡
し、やがて55分後に炭化を完了して、フランジ１、１間
のすき間を補って遮断性を完全にし、すき間からの煙の
もれを完全に防止した。また、ダクトの外側から内側へ
の煙の火の侵入をも防止した。Then, the refractory thin film was heated 5 minutes after the start of heating,
That is, at a temperature of 250 to 300 ° C., it foams violently and, after 55 minutes, completes the carbonization, supplements the gap between the flanges 1 and 1 to complete the barrier property, and prevents the leakage of smoke from the gap. Completely prevented. It also prevented smoke from entering the duct from the outside to the inside.
【００２５】（Ｄ）空気漏水量（リーク量）の測定試験
図１の形式のダクト５を用いて空気リーク量測定試験を
行った。パーツ１、２は耐火シリコンシール材（商品
名：フアイヤーシールシリコン（イボード社製））を塗
布し、10日間放置して完全シールした。(D) Air leakage measurement (leakage) measurement test An air leakage measurement test was conducted using the duct 5 of the type shown in FIG. Parts 1 and 2 were coated with a fire resistant silicone sealant (trade name: Fire Seal Silicone (manufactured by Iboard Co.)) and left for 10 days to be completely sealed.
【００２６】また、ガスケット３（ＡＳ−２８．15mm幅
×６mm厚。(株）アサヒ産業製）の片面３ａに上述の
（Ａ）で調製された混合液を吹付塗装し、自然乾燥させ
て被覆材６としての厚さ１.5mmの耐火薄膜を形成した。On one side 3a of the gasket 3 (AS-28.15 mm width × 6 mm thickness; manufactured by Asahi Sangyo Co., Ltd.), the mixed solution prepared in the above (A) is spray-painted and naturally dried to cover. A fireproof thin film having a thickness of 1.5 mm was formed as the material 6.
【００２７】次いで、このガスケット３をパーツ１、２
の継目フランジ１、１間に挟み、図２のように押え金具
４を用いて組み立てた。このようにして組み立てられた
ダクト５について、まず加熱前のリ−ク量を測定した。Next, the gasket 3 is attached to parts 1, 2
It was sandwiched between the seam flanges 1 and 1 and assembled using the holding metal fitting 4 as shown in FIG. With respect to the duct 5 assembled in this way, the amount of leak before heating was first measured.
【００２８】リ−ク量の測定は図４に示されるリ−ク量
測定装置を用いて行った。なお、ダクトは一般に低圧仕
様のため、このリ−ク量測定は破壊しない静圧範囲（０
〜１00mmＡｇ）で行った。図４において、ダクト内静圧
の調整はフアン７の吸込側および吹出し側にそれぞれ設
けたダクト内静圧調整用開口８の大きさを変化すること
により行った。リ−ク量測定時の静圧について、±１mm
Ａｇの範囲内でのばらつきは許容範囲とした。ダクト５
のリ−ク量はゴムホース９（５mmΦ）を介してダクト５
と連通されたデジタルマノメータ10によって測定され
た。図４中、11は流量計、12はゴムホース（８mmΦ）で
ある。The amount of leak was measured by using the leak amount measuring device shown in FIG. Since ducts are generally low pressure specifications, this leak amount measurement does not destroy the static pressure range (0
~ 100 mm Ag). In FIG. 4, the static pressure in the duct was adjusted by changing the sizes of the static pressure adjusting openings 8 in the duct provided on the suction side and the blowout side of the fan 7, respectively. Static pressure when measuring leak amount ± 1 mm
The variation within the range of Ag was set within the allowable range. Duct 5
The amount of leak of the duct 5 through the rubber hose 9 (5mmΦ)
Measured by a digital manometer 10 in communication with. In FIG. 4, 11 is a flow meter and 12 is a rubber hose (8 mmΦ).
【００２９】次いで、図２のダクト５を図示しないがオ
ーブンに入れ、５00℃の温度で１時間加熱し、耐火薄膜
の発泡を確認の後、常温まで自然冷却した。この加熱後
のダクト５について、上述と同様にしてリーク量を測定
した。Next, the duct 5 shown in FIG. 2 was placed in an oven (not shown) and heated at a temperature of 500 ° C. for 1 hour, and after confirming the foaming of the refractory thin film, it was naturally cooled to room temperature. The leak amount of the heated duct 5 was measured in the same manner as described above.
【００３０】上述のリーク量測定結果を図５のグラフに
示す。図５のグラフはダクト５の加熱前（発泡前）およ
び加熱後（発泡後）のフランジ長さ１ｍ換算のリーク量
である。また、参考として、（社）空気調和衛生工学会
で報告されている次の実験式による値を併記した。The above-mentioned leak amount measurement result is shown in the graph of FIG. The graph of FIG. 5 shows the amount of leakage before the duct 5 is heated (before foaming) and after heating (after foaming) in terms of the flange length of 1 m. In addition, as a reference, the values based on the following empirical formulas reported by the Society of Air Conditioning and Sanitation Engineering are also shown.
【００３１】[0031]
【数１】Ｑ＝Ｋ×Ｐ0.75（Ｋ≦１）[Equation 1] Q = K × P 0.75 (K ≦ 1)
【００３２】式中、Ｑはリーク量（ｌ／min.m)であり、
Ｐはダクト内静圧（mmＡq)である。Ｋは定数であり、Ｋ
＝１のとき、リーク量の上限となる。図５の実験式Ｑの
グラフはＫ＝１のとき、すなわち、リーク量上限のとき
のＰとＱとの関係を表す。In the equation, Q is the leak amount (l / min.m),
P is the static pressure in the duct (mmAq). K is a constant and K
When = 1, it becomes the upper limit of the leak amount. The graph of the empirical formula Q in FIG. 5 shows the relationship between P and Q when K = 1, that is, when the leak amount is the upper limit.
【００３３】図５から、発泡後ではガスケットは燃えて
消失したにもかかわらず、発泡前後でリーク量の差はほ
とんどないことがわかる。このことはガスケット３は燃
えて減容したが、耐火薄膜の発泡によりガスケットの減
容分が完全に埋まったことを意味する。なお、この発泡
は比較的均一である。From FIG. 5, it can be seen that there is almost no difference in the amount of leak before and after foaming, although the gasket burned and disappeared after foaming. This means that the gasket 3 burned and had its volume reduced, but the volume reduction of the gasket was completely filled by the foaming of the fireproof thin film. Note that this foaming is relatively uniform.
【００３４】[0034]
【発明の効果】以上のとおり、本発明にかかるダクトは
ガスケットの少なくとも一方の面に、および／または継
目フランジの少なくとも一方の接合面に被覆材を形成
し、この被覆材が高温で発泡炭化物の断熱層を形成する
耐火薄膜であるから、特に火災時において、断熱性およ
び遮断性を発揮し、空調および排煙用ダクトとして最適
である。As described above, in the duct according to the present invention, the coating material is formed on at least one surface of the gasket and / or the joint surface of at least one of the joint flanges, and the coating material is made of foamed carbide at a high temperature. Since it is a fire-resistant thin film that forms a heat insulating layer, it exhibits heat insulating properties and blocking properties, especially during a fire, and is optimal as an air conditioning and smoke exhaust duct.
【図１】本発明にかかるダクトの分解斜視図である。FIG. 1 is an exploded perspective view of a duct according to the present invention.
【図２】組み立ての終了した本発明にかかるダクトの完
成斜視図である。FIG. 2 is a perspective view of a completed duct according to the present invention which has been assembled.
【図３】図２におけるフランジ部分の断面図である。FIG. 3 is a sectional view of a flange portion in FIG.
【図４】ダクトの空気リーク量測定装置の略図である。FIG. 4 is a schematic view of an air leak amount measuring device for a duct.
【図５】静圧Ｐと空気漏水量Ｑとの関係を表したグラフ
である。FIG. 5 is a graph showing the relationship between static pressure P and air leakage amount Q.
１ 継目フランジ １ａ 接合面 ２ パーツ ３ ガスケット ３ａ 面 ４ 押さえ金具 ５ ダクト ６ 被覆材 1 seam flange 1a Bonding surface 2 parts 3 gasket 3a side 4 metal fittings 5 ducts 6 coating material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 牛山 泰 東京都武蔵野市御殿山２−１−５ (56)参考文献 特開 平５−220879（ＪＰ，Ａ) 実開 平５−64640（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F24F 13/02 C08L 101/00 C09D 5/18 C09K 3/10 E04F 17/02 E04F 17/04 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasushi Ushiyama 2-1-5 Gotenyama, Musashino-shi, Tokyo (56) Reference JP-A-5-220879 (JP, A) SAIKAI HEI 5-64640 (JP, U ) (58) Fields investigated (Int.Cl. 7 , DB name) F24F 13/02 C08L 101/00 C09D 5/18 C09K 3/10 E04F 17/02 E04F 17/04
Claims (4)
間にガスケットを挟着して組み立てられる空調および排
煙用ダクトにおいて、前記ガスケットの少なくとも一方
の面に、および／または前記継目フランジの少なくとも
一方の接合面に被覆材を形成してなり、この被覆材とし
て高温で発泡炭化物の断熱層を形成する、炭化層形成
材、リン酸系化合物、発泡剤および結合材からなる耐火
薄膜を用い、前記炭化層形成材が炭水化物類、多官能ア
ルコールおよび樹脂状物質の群から選択された一種また
は複数種であり、前記炭化水素類がでんぷん、デキスト
リンおよび多糖類の群から選択された一種または複数種
であることを特徴とする空調および排煙用ダクト。1. An air-conditioning and smoke-exhausting duct, comprising a seam flange, wherein gaskets are sandwiched between the seam flanges, and at least one surface of the gasket and / or at least one of the seam flanges. Forming a carbonized layer by forming a coating material on the joint surface and forming a heat insulating layer of expanded carbide at this temperature as a coating material
Wood, phosphoric acid compound, using a refractory thin film made of blowing agent and binder, the carbide layer formation material carbohydrates, polyfunctional A
One selected from the group of rucoles and resinous substances
Is a plurality of types, and the hydrocarbons are starch and dext
One or more selected from the group of phosphorus and polysaccharides
Air conditioning and flue gas duct, characterized in that it.
間にガスケットを挟着して組み立てられる空調および排
煙用ダクトにおいて、前記ガスケットの少なくとも一方
の面に、および／または前記継目フランジの少なくとも
一方の接合面に被覆材を形成してなり、この被覆材とし
て高温で発泡炭化物の断熱層を形成する、炭化層形成
材、リン酸系化合物、発泡剤および結合材からなる耐火
薄膜を用い、この結合材がアクリル系またはエチレン酢
ビ系樹脂エマルジョンであることを特徴とする空調およ
び排煙用ダクト。 2. A seam flange, which comprises the seam flange.
Air conditioning and exhaust assembled with gaskets sandwiched between
In a smoke duct, at least one of the gaskets
Surface and / or at least the seam flange
A coating material is formed on one joint surface.
Carbonized layer formation that forms a heat insulating layer of expanded carbide at high temperature
Fire resistance consisting of wood, phosphoric acid compound, foaming agent and binder
A thin film is used and the binder is acrylic or ethylene
Air-conditioning and
And smoke exhaust duct.
間にガスケットを挟着して組み立てられる空調および排
煙用ダクトにおいて、前記ガスケットの少なくとも一方
の面に、および／または前記継目フランジの少なくとも
一方の接合面に被覆材を形成してなり、この被覆材とし
て高温で発泡炭化物の断熱層を形成する、炭化層形成
材、リン酸系化合物、発泡剤および結合材からなる耐火
薄膜を用い、この耐火薄膜の各成分の配合量が炭火層形
成材５〜１５重量部、リン酸系化合物２５〜３５重量
部、発泡剤５〜１５重量部、および結合材１５〜２５重
量部であることを特徴とする空調および排煙用ダクト。3. A seam flange, the seam flange
Air conditioning and exhaust assembled with gaskets sandwiched between
In a smoke duct, at least one of the gaskets
Surface and / or at least the seam flange
A coating material is formed on one joint surface.
Carbonized layer formation that forms a heat insulating layer of expanded carbide at high temperature
Fire resistance consisting of wood, phosphoric acid compound, foaming agent and binder
Using a thin film, the blending amount of each component of this fire resistant thin film is charcoal layer type.
5 to 15 parts by weight of material, 25 to 35 parts by weight of phosphoric acid compound
Parts, 5 to 15 parts by weight of blowing agent, and 15 to 25 parts by weight of binder.
An air-conditioning and smoke exhaust duct characterized by being a volume unit .
間にガスケットを挟着して組み立てられる空調および排
煙用ダクトにおいて、前記ガスケットの少なくとも一方
の面に、および／または前記継目フランジの少なくとも
一方の接合面に被覆材を形成してなり、この被覆材とし
て高温で発泡炭化物の断熱層を形成する、炭化層形成
材、リン酸系化合物、発泡剤および結合材からなる耐火
薄膜を用い前記耐火薄膜がさらに水酸化アルミニウムお
よび／または不活性充填剤を含有することを特徴とする
空調および排煙用ダクト。4. A seam flange, the seam flange
Air conditioning and exhaust assembled with gaskets sandwiched between
In a smoke duct, at least one of the gaskets
Surface and / or at least the seam flange
A coating material is formed on one joint surface.
Carbonized layer formation that forms a heat insulating layer of expanded carbide at high temperature
Fire resistance consisting of wood, phosphoric acid compound, foaming agent and binder
Using a thin film, the refractory thin film is made of aluminum hydroxide or
And / or containing an inert filler
Air conditioning and smoke exhaust ducts .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33454894A JP3530608B2 (en) | 1994-12-20 | 1994-12-20 | Air conditioning and smoke exhaust ducts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33454894A JP3530608B2 (en) | 1994-12-20 | 1994-12-20 | Air conditioning and smoke exhaust ducts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08178404A JPH08178404A (en) | 1996-07-12 |
| JP3530608B2 true JP3530608B2 (en) | 2004-05-24 |
Family
ID=18278652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33454894A Expired - Fee Related JP3530608B2 (en) | 1994-12-20 | 1994-12-20 | Air conditioning and smoke exhaust ducts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3530608B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0219140D0 (en) * | 2002-08-16 | 2002-09-25 | Mackay Donald | Improved ventilation duct and method of producing same |
| US7195290B2 (en) | 2003-11-13 | 2007-03-27 | William Christopher Duffy | Apparatus for a fire-rated duct |
| JP5074852B2 (en) * | 2007-07-31 | 2012-11-14 | キョーラク株式会社 | Air conditioning duct |
| US9074788B2 (en) | 2012-01-06 | 2015-07-07 | William Christopher Duffy | Fire-rated modular duct assembly suitable for exhausting flammable or hazardous gases, vapours and other materials |
| JP2014136744A (en) * | 2013-01-17 | 2014-07-28 | Hideki Kojiya | Foamable fire-resistive coating material composition |
| US10024569B2 (en) | 2013-10-10 | 2018-07-17 | William Christopher Duffy | Fire-rated modular duct assembly and improvements therein |
| CN106988508B (en) * | 2017-04-17 | 2019-04-26 | 中国十七冶集团有限公司 | A kind of super high-rise building fire-resistant ventilation duct |
| CN111576790A (en) * | 2019-11-29 | 2020-08-25 | 杭州润泉环境科技有限公司 | Novel compound oil extraction cigarette air flue of house |
| KR200491769Y1 (en) * | 2020-04-09 | 2020-06-02 | (주)대양기연 | Connecting flue tube whit fire resisting paint |
| KR102551777B1 (en) * | 2021-02-06 | 2023-07-04 | 신승용 | The duct pipe connector for the fire diffusion prevention equipped with the fireproof insulation damper |
-
1994
- 1994-12-20 JP JP33454894A patent/JP3530608B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08178404A (en) | 1996-07-12 |
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