JP7465844B2 - Insulating cover structure - Google Patents

Insulating cover structure Download PDF

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JP7465844B2
JP7465844B2 JP2021067329A JP2021067329A JP7465844B2 JP 7465844 B2 JP7465844 B2 JP 7465844B2 JP 2021067329 A JP2021067329 A JP 2021067329A JP 2021067329 A JP2021067329 A JP 2021067329A JP 7465844 B2 JP7465844 B2 JP 7465844B2
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insulation
piping device
fluid piping
exterior material
fluid
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JP2022162458A (en
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秀樹 若山
亜美 勝原
充樹 日野出
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Meisei Industrial Co Ltd
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Description

本発明は、常温より高い高温流体を通流させる流体配管装置の外周部を、全周にわたって覆う無機材から成型された断熱材を設け、前記断熱材を前記流体配管装置の周囲に沿う筒形状に形成するとともに、筒形状の前記断熱材を周方向に分割して周方向分割断熱材を形成し、前記流体配管装置の外周部全体を覆うように複数の前記周方向分割断熱材を装着した状態で、前記周方向分割断熱材の外側に、非透水性の断熱材用外装材を被覆して断熱被覆可能に構成してある断熱カバー構造に関する。 The present invention relates to an insulation cover structure in which an insulating material molded from an inorganic material is provided to cover the entire outer periphery of a fluid piping device through which a high-temperature fluid higher than room temperature flows, the insulating material is formed into a cylindrical shape that fits the periphery of the fluid piping device, the cylindrical insulating material is divided circumferentially to form circumferentially divided insulating materials, and a plurality of the circumferentially divided insulating materials are attached so as to cover the entire outer periphery of the fluid piping device, and a non-permeable insulating exterior material is applied to the outside of the circumferentially divided insulating materials to provide thermal insulation.

従来、断熱カバー構造においては、一般的には前記断熱材用外装材を、塗装溶融亜鉛メッキ鋼板、亜鉛引き鉄板、ガルバニウム鋼板、ステンレス鋼板、並びに、アルミニウム板等から成る約0.25~0.5mm厚の金属板を筒状に曲げ加工した板金製品から形成しておいて、その断熱材用外装材を、施工現場における直管やエルボ管等の流体配管装置の外周部に全周にわたって覆った断熱材の外側に被覆し、その板金製品のハゼ加工やヒモ出しロール加工をした端部同士の連結により、流体配管装置に装着した断熱カバー構造を構成していた(周知技術である)。
しかし、上記断熱カバー構造においては、加工や流体配管装置への装着に、施工現場で熟練の技術者や専用の工具が必要であるばかりか、流体配管装置が室外配管の場合は、防水性が悪く、断熱材用外装材の端部同士の連結部から断熱材用外装材の内側に雨水が浸入して断熱材の断熱性能が低下する虞がある。
また、前記断熱材用外装材は、外力によって塑性変形して断熱材の断熱性能に悪影響を与える部分が生じたりするおそれがあった。
そこで、前記断熱材用外装材を、合成樹脂フィルムの層厚内にアルミニウム箔などの金属層を備えた可撓性及び弾性のある金属ラミネートシートから構成し(例えば、特許文献1参照)、前記流体配管装置の周方向における前記断熱材用外装材の両端部同士に亘って、金属ラミネートから成る長手目地シール用帯状体を、粘着剤を介して前記流体配管装置の長手方向に沿って粘着させて一体化することが考えられる(例えば、特許文献2参照)。
Conventionally, in a heat insulating cover structure, the exterior material for heat insulating material is generally formed from a sheet metal product obtained by bending a metal plate having a thickness of about 0.25 to 0.5 mm, such as a painted hot-dip galvanized steel plate, a galvanized iron plate, a galvalume steel plate, a stainless steel plate, or an aluminum plate, into a cylindrical shape. The exterior material for heat insulating material is then applied to the outside of a heat insulating material that covers the entire outer periphery of a fluid piping device, such as a straight pipe or an elbow pipe, at a construction site. The ends of the sheet metal product are then processed by seam processing or string roll processing, and an heat insulating cover structure is attached to the fluid piping device by connecting them together (this is a well-known technique).
However, in the above-mentioned insulation cover structure, not only do skilled technicians and specialized tools are required at the construction site for processing and attachment to the fluid piping device, but when the fluid piping device is an outdoor piping device, the waterproofing is poor, and there is a risk that rainwater will penetrate into the inside of the insulation exterior material through the connection between the ends of the insulation exterior material, thereby reducing the insulating performance of the insulation material.
Furthermore, the packaging material for a thermal insulator may be plastically deformed by an external force, resulting in the generation of portions that adversely affect the thermal insulation performance of the thermal insulator.
Therefore, it is conceivable to construct the insulation exterior material from a flexible and elastic metal laminate sheet having a metal layer such as aluminum foil within the thickness of a synthetic resin film (see, for example, Patent Document 1), and to integrate the insulation exterior material by adhering a longitudinal joint sealing band made of metal laminate along the longitudinal direction of the fluid piping device via an adhesive across both ends of the insulation exterior material in the circumferential direction of the fluid piping device (see, for example, Patent Document 2).

特表2009-509816号公報JP 2009-509816 A 特開2012-225403号公報JP 2012-225403 A

つまり、上記断熱材用外装材によって、熟練工によらずとも断熱施工が容易にでき、しかも、金属ラミネートシートから構成される断熱材用外装材は可撓性及び弾性があるために、外力が作用しても、塑性変形しにくく復元力があり、流体に対する断熱性能を良好に維持できる。
しかし、流体配管装置に通流させる流体が、特に常温より高い高温流体の場合には、一般的に断熱材として、例えば珪酸カルシウム等から成る多孔質の無機成型体を使用することが多いが、流体配管装置に通流する流体の温度変化によって、配管が径方向に伸縮し、特に流体配管装置の周方向における断熱材用外装材端部間に大きな負荷が発生して、それらの目地部が開きすぎたり、場合によっては破壊されたりして断熱性能や防水性能に支障が発生する虞がある。
つまり、通常は流体配管装置に対する断熱カバーの施工時は、常温状態で施工し、その後に流体配管装置に高温の流体を通流するのが普通で、そのような状態変化時に配管が径方向に伸縮することが多く、上記問題が発生することが考えられる。
In other words, the above-mentioned exterior material for heat insulation allows even non-expert workers to easily carry out heat insulation work, and since the exterior material for heat insulation made of a metal laminate sheet is flexible and elastic, it is resistant to plastic deformation even when an external force is applied, has a strong resilience, and can maintain good heat insulation performance against fluids.
However, when the fluid flowing through the fluid piping device is a high-temperature fluid, particularly one that is higher than room temperature, a porous inorganic molded body made of, for example, calcium silicate is generally used as the insulating material. However, temperature changes in the fluid flowing through the fluid piping device cause the piping to expand and contract radially, and large loads are generated, particularly between the ends of the insulating exterior material in the circumferential direction of the fluid piping device, which can cause the joints to open too wide or, in some cases, be destroyed, resulting in impaired insulating and waterproofing performance.
In other words, when an insulating cover is normally installed on a fluid piping device, it is usually installed at room temperature and then a high-temperature fluid is passed through the fluid piping device.During such changes in condition, the piping often expands and contracts radially, which can cause the above-mentioned problems.

従って、本発明の目的は、上記問題点を解消し、流体配管装置に通流する流体の温度変化があっても、断熱カバー構造に支障が発生するのを防止できるようにするところにある。 The object of the present invention is therefore to solve the above problems and to prevent problems from occurring in the insulating cover structure even if there is a change in the temperature of the fluid flowing through the fluid piping device.

本発明の第1の特徴構成は、常温より高い高温流体を通流させる流体配管装置の外周部を、全周にわたって覆う無機材から成型された断熱材を設け、前記断熱材を前記流体配管装置の周囲に沿う筒形状に形成するとともに、筒形状の前記断熱材を周方向に分割して周方向分割断熱材を形成し、前記流体配管装置の外周部全体を覆うように複数の前記周方向分割断熱材を装着した状態で、前記周方向分割断熱材の外側に、非透水性の断熱材用外装材を被覆して断熱被覆可能に構成し、前記断熱材用外装材を、合成樹脂フィルムの層厚内に金属層を備えた可撓性及び弾性のある金属ラミネートシートから構成し、前記断熱材を被覆する前記断熱材外装材の内側を断熱性能や防水性能に支障が発生するのを防止すべく前記周方向における前記断熱材用外装材の両端部どうしを前記流体配管装置の長手方向に沿って粘着剤を介して一体化する長手目地シール用帯状体を設け、前記断熱材用外装材における前記長手目地シール用帯状体の近傍に、径方向外方に突出した蛇腹部を前記流体配管装置の長手方向に沿って設けて、前記流体配管装置の周方向に伸縮自在な周方向伸縮許容部に形成し、前記断熱材用外装材において前記蛇腹部または前記長手目地シール用帯状体の近傍以外の個所は、前記断熱材の外表面の筒形状に沿う形状に形成してあり、前記断熱材用外装材に、前記断熱材に対して一体に接着してある接着部と、非接着部とを設け、前記非接着部に前記周方向伸縮許容部を設けたところにある。 The first characteristic configuration of the present invention is to provide an insulating material molded from an inorganic material that covers the entire outer periphery of a fluid piping device that passes a high-temperature fluid that is higher than room temperature, form the insulating material into a cylindrical shape that fits the periphery of the fluid piping device, and divide the cylindrical insulating material in the circumferential direction to form circumferentially divided insulating materials. In a state in which a plurality of the circumferentially divided insulating materials are attached so as to cover the entire outer periphery of the fluid piping device, the outside of the circumferentially divided insulating materials is covered with a non-permeable insulating material exterior material to be configured to be insulatingly covered, and the insulating material exterior material is composed of a flexible and elastic metal laminate sheet having a metal layer within the layer thickness of a synthetic resin film, and the inside of the insulating material exterior material that covers the insulating material is covered with a non-permeable metal laminate sheet having a metal layer within the layer thickness of the synthetic resin film to prevent any impairment of the insulating performance or waterproof performance. In order to prevent this, a longitudinal joint sealing band is provided that integrates both ends of the insulation exterior material in the circumferential direction along the longitudinal direction of the fluid piping device using an adhesive, and a bellows portion that protrudes radially outward is provided near the longitudinal joint sealing band in the insulation exterior material along the longitudinal direction of the fluid piping device to form a circumferential expansion and contraction allowance portion that can expand and contract in the circumferential direction of the fluid piping device, and the insulation exterior material is formed in a shape that follows the cylindrical shape of the outer surface of the insulation material in places other than the bellows portion or the vicinity of the longitudinal joint sealing band, and the insulation exterior material is provided with an adhesive portion that is integrally bonded to the insulation material and a non-adhesive portion, and the non-adhesive portion is provided with the circumferential expansion and contraction allowance portion.

本発明の第1の特徴構成によれば、一般的に配管と無機材から成型された断熱材とでは線膨張係数が大きく異なるばかりか、断熱材の内側と外側とでは温度差が大きく異なり、流体配管装置に通流する流体の温度変化によって、その温度変化の度合いによっては、配管が断熱材より大きく伸縮する。
そして、断熱材用外装材は、流体配管装置の周方向における両端部どうしが粘着剤を介して一体化してあり、しかも、断熱材によって断熱されているために、流体の温度変化は伝わりにくく、配管の径方向における膨張収縮に伴って長手目地シール用帯状体に負荷が発生する。
そのために、断熱材用外装材における流体配管装置の周方向における両端部どうしや、断熱材用外装材と長手目地シール用帯状体との粘着一体化部分が破壊されたり、断熱用外装材自身が破損したりする虞があるが、周方向伸縮許容部によって、配管の伸縮に伴って流体配管装置の周方向に作用する負荷が吸収緩和され、断熱材用外装材における流体配管装置の周方向における両端部どうしや、断熱材用外装材と長手目地シール用帯状体との粘着一体化部分の破壊を防止できる。
従って、室外配管部分においても、雨水に対する防水性能を高く維持できながら流体配管装置に対する断熱性を高く維持できる。
また、流体配管装置に対する温度変化以外に、風圧や地震動から受ける外力に対しても、周方向伸縮許容部がそれらの外力を吸収でき、流体配管装置に対する断熱性能を高く維持できる。
断熱材に対して一体に接着してある接着部を設けてあることにより、流体配管装置に対する断熱材と断熱材用外装材による断熱被覆の施工が短時間で簡単に行うことができる。
しかも、非接着部に設けた周方向伸縮許容部により、流体配管装置の径方向に対する膨張収縮に伴って断熱材用外装材にかかる負荷を吸収して、断熱カバー構造による断熱性能を高く維持できる。
According to the first characteristic configuration of the present invention, not only do piping and insulation material molded from inorganic materials generally have significantly different linear expansion coefficients, but also there is a large temperature difference between the inside and outside of the insulation material, and depending on the degree of temperature change caused by changes in the temperature of the fluid flowing through the fluid piping device, the piping will expand and contract more than the insulation material.
Furthermore, since the insulation outer casing has both circumferential ends of the fluid piping device integrated together via an adhesive and is insulated by the insulation material, temperature changes in the fluid are not easily transmitted and loads are generated on the longitudinal joint sealing strip as the piping expands and contracts in the radial direction.
As a result, there is a risk that the adhesive integrated portions between the two circumferential ends of the insulation exterior material in the fluid piping device or between the insulation exterior material and the longitudinal joint sealing band may be destroyed, or that the insulation exterior material itself may be damaged; however, the circumferential expansion/contraction portion absorbs and alleviates the load that acts in the circumferential direction on the fluid piping device as the piping expands and contracts, preventing destruction of the adhesive integrated portions between the two circumferential ends of the insulation exterior material in the fluid piping device or between the insulation exterior material and the longitudinal joint sealing band.
Therefore, in the outdoor piping portion, high waterproof performance against rainwater can be maintained while high thermal insulation performance against the fluid piping device can be maintained.
Furthermore, the circumferentially expandable portion can absorb external forces such as wind pressure and earthquake motion as well as temperature changes applied to the fluid piping device, thereby maintaining high thermal insulation performance for the fluid piping device.
By providing an adhesive portion that is integrally adhered to the heat insulating material, the application of the heat insulating material and the heat insulating covering material to the fluid piping device can be carried out easily in a short time.
Furthermore, the circumferential expansion/contraction portion provided in the non-bonded portion absorbs the load applied to the insulating outer casing material due to radial expansion and contraction of the fluid piping device, thereby maintaining high insulating performance of the insulating cover structure.

本発明の第2の特徴構成は、前記断熱材が珪酸カルシウムから成る多孔質の成型体を主体とするものである。 The second characteristic feature of the present invention is that the insulating material is mainly a porous molded body made of calcium silicate.

本発明の第2の特徴構成によれば、本発明の第1の特徴構成による上述の作用効果を叶えることができるのに加えて、珪酸カルシウムから成型された断熱材は、流体配管装置に高温流体を通流させても高い断熱作用を発揮でき、そのうえ、たとえその断熱材と流体配管装置との線膨張係数に大きな差があっても、断熱材用外装材に設けた簡単な構造の蛇腹部によって伸縮が許容され、その結果、断熱カバー構造による断熱性能を高く維持できるようになる。 According to the second characteristic configuration of the present invention, in addition to being able to achieve the above-mentioned effects of the first characteristic configuration of the present invention, the insulation material molded from calcium silicate can exhibit high insulation properties even when high-temperature fluid is passed through the fluid piping device, and even if there is a large difference in the linear expansion coefficient between the insulation material and the fluid piping device, expansion and contraction is permitted by the bellows section of a simple structure provided on the insulation exterior material, and as a result, the insulation performance of the insulation cover structure can be maintained at a high level.

本発明の施工状態を示す全体斜視図である。FIG. 1 is an overall perspective view showing an installation state of the present invention. 本発明の施工途中を示す斜視図である。FIG. 2 is a perspective view showing the process of construction of the present invention. 断熱材用外装材の拡大断面図である。FIG. 2 is an enlarged cross-sectional view of an exterior material for thermal insulation. 長手目地シール用帯状体又は周目地シール用帯状体の拡大断面図である。FIG. 2 is an enlarged cross-sectional view of a longitudinal joint sealing strip or a circumferential joint sealing strip. 第1実施形態の要部断面図で、(a)は流体配管装置の膨張前、(b)は流体配管装置の膨張後を示す。1A and 1B are cross-sectional views of essential parts of a first embodiment, in which FIG. 1A shows a fluid piping device before expansion, and FIG. 第2実施形態の一例の要部断面図で、(a)は流体配管装置の膨張前、(b)は流体配管装置の膨張後を示す。11A and 11B are cross-sectional views of essential parts of an example of a second embodiment, in which FIG. 11A shows a fluid piping device before expansion, and FIG. 第2実施形態の別例の要部断面図で、(a)は流体配管装置の膨張前、(b)は流体配管装置の膨張後を示す。10A and 10B are cross-sectional views of essential parts of another example of the second embodiment, in which FIG. 10A shows the fluid piping device before expansion, and FIG. 第2実施形態の別例の要部断面図で、(a)は流体配管装置の膨張前、(b)は流体配管装置の膨張後を示す。10A and 10B are cross-sectional views of essential parts of another example of the second embodiment, in which FIG. 10A shows the fluid piping device before expansion, and FIG. 第2実施形態の別例の要部断面図で、(a)は流体配管装置の膨張前、(b)は流体配管装置の膨張後を示す。10A and 10B are cross-sectional views of essential parts of another example of the second embodiment, in which FIG. 10A shows the fluid piping device before expansion, and FIG. 第3実施形態の要部断面図で、(a)は流体配管装置の膨張前、(b)は流体配管装置の膨張後を示す。11A and 11B are cross-sectional views of essential parts of a third embodiment, in which FIG. 11A shows a fluid piping device before expansion, and FIG. 第3実施形態の別例の要部断面図で、(a)は流体配管装置の膨張前、(b)は流体配管装置の膨張後を示す。13A and 13B are cross-sectional views of essential parts of another example of the third embodiment, in which FIG. 13A shows the fluid piping device before expansion, and FIG. 別実施形態の要部断面図で、(a)は流体配管装置の膨張前、(b)は流体配管装置の膨張後を示す。10A and 10B are cross-sectional views of essential parts of another embodiment, in which FIG. 10A shows the fluid piping device before expansion, and FIG. 別実施形態の全体斜視図である。FIG. 別実施形態の全体斜視図である。FIG.

以下に本発明の実施の形態を図面に基づいて説明する。
図1~図2に示すように、常温より高い高温流体を通流させる直管部やエルボ管部やバルブなどから成る流体配管装置1の外周部を、全周にわたって覆う、例えば珪酸カルシウム等の無機材から成型された多孔質の断熱材2を設け、その断熱材2を流体配管装置1の周囲に沿う筒形状に形成するとともに、筒形状の断熱材2を周方向に分割して周方向分割断熱材2Aを形成し、流体配管装置1の外周部全体を覆うように複数の周方向分割断熱材2Aを装着した状態で、周方向分割断熱材2Aの外側に、非透水性の断熱材用外装材3を被覆して断熱被覆可能に構成し、前記周方向における断熱材用外装材3の両端部どうしを、流体配管装置1の長手方向に沿って粘着剤を介して一体化する長手目地シール用帯状体4Aを設けると共に、流体配管装置1の長手方向に隣接する断熱材用外装材3同士に亘って、金属ラミネートから成る周目地シール用帯状体4Bを、粘着剤を介して流体配管装置1の周方向に巻き付けて一体化して断熱カバー構造を構成してある。
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, a porous insulating material 2 molded from an inorganic material such as calcium silicate is provided to cover the entire outer periphery of a fluid piping device 1, which is made up of straight pipes, elbow pipes, valves, etc., through which a high-temperature fluid that is higher than room temperature flows. The insulating material 2 is formed into a cylindrical shape that fits the periphery of the fluid piping device 1, and the cylindrical insulating material 2 is divided in the circumferential direction to form circumferentially divided insulating materials 2A. With the multiple circumferentially divided insulating materials 2A attached so as to cover the entire outer periphery of the fluid piping device 1, the circumferentially divided insulating materials 2A are attached. The outside of the insulation 2A is covered with a non-permeable insulation exterior material 3 to enable insulation covering, and a longitudinal joint sealing band 4A is provided to integrate both ends of the insulation exterior material 3 in the circumferential direction along the longitudinal direction of the fluid piping device 1 via an adhesive, and a circumferential joint sealing band 4B made of a metal laminate is wrapped around adjacent insulation exterior materials 3 in the longitudinal direction of the fluid piping device 1 via an adhesive to integrate them, thereby forming an insulation cover structure.

前記断熱材用外装材3は、合成樹脂フィルムの層厚内に金属層5を備えた可撓性及び弾性のある金属ラミネートシートから構成してある。
つまり、図3に示すように、最外層に紫外線の透過を防止するポリエステル樹脂(PET)層7を設け、そのポリエステル樹脂層7の内側に、厚さ9μmのアルミニウム箔から成る金属層5を設け、アルミニウム箔の内側に難燃性樹脂基材として難燃性ポリ塩化ビニル樹脂(PVC)層8を設けて、厚さ0.23mmの断熱材用外装材3を構成してある。
The thermal insulation exterior material 3 is made of a flexible and elastic metal laminate sheet having a metal layer 5 within the thickness of a synthetic resin film.
That is, as shown in FIG. 3, a polyester resin (PET) layer 7 that prevents ultraviolet light from passing through is provided as the outermost layer, a metal layer 5 made of aluminum foil having a thickness of 9 μm is provided inside the polyester resin layer 7, and a flame-retardant polyvinyl chloride resin (PVC) layer 8 is provided as a flame-retardant resin substrate inside the aluminum foil to constitute an exterior material 3 for thermal insulation having a thickness of 0.23 mm.

前記長手目地シール用帯状体4A、及び、周目地シール用帯状体4Bは、図4に示すように、前記断熱材用外装材3と同様の樹脂シートを、アルミニウム箔厚さ9μmで全体シート厚さ0.035mm、幅50mmのテープ状に形成し、その内側面にアクリル系粘着剤9の層を設けてある。 As shown in FIG. 4, the longitudinal joint sealing strip 4A and the peripheral joint sealing strip 4B are made of the same resin sheet as the insulation exterior material 3, formed into a tape shape with an aluminum foil thickness of 9 μm, a total sheet thickness of 0.035 mm, and a width of 50 mm, and a layer of acrylic adhesive 9 is provided on the inner surface.

図5~図7に示すように、流体配管装置1に通流する流体の温度変化、又は、断熱カバー施工時と輸送流体の通流時との温度変化に伴って、配管が径方向に膨張又は収縮し、特に流体配管装置1の周方向に隣接する断熱材用外装材端部間に大きな負荷が発生して、それらの目地部が開きすぎたり、場合によっては破壊されたりして断熱性能や防水性能に支障が発生する現象に対応できるように、前記断熱材用外装材3(図5)または、長手目地シール用帯状体4A(図6、図7)の少なくともいずれか一方に流体配管装置1の周方向に伸縮自在な周方向伸縮許容部11を設けてある。 As shown in Figures 5 to 7, the piping expands or contracts in the radial direction due to temperature changes in the fluid flowing through the fluid piping device 1, or temperature changes between when the insulation cover is installed and when the transport fluid flows, and a large load is generated between the ends of the insulation exterior material adjacent to each other in the circumferential direction of the fluid piping device 1, causing the joints to open too much or even to break, resulting in impaired insulation and waterproofing performance. In order to deal with this phenomenon, at least one of the insulation exterior material 3 (Figure 5) or the longitudinal joint sealing strip 4A (Figures 6 and 7) is provided with a circumferential expansion and contraction allowance portion 11 that can expand and contract in the circumferential direction of the fluid piping device 1.

また、周方向伸縮許容部11は、温度変化に伴う配管の伸縮に対応した断熱構造のみならず、風圧や地震動に基づく配管の振動や外力に対しても、それらの外力を吸収して、断熱性能を高く維持できる能力を発揮できる。 The circumferential expansion-permitting section 11 is not only an insulating structure that can accommodate expansion and contraction of the piping due to temperature changes, but also has the ability to absorb external forces and maintain high insulating performance against vibrations of the piping caused by wind pressure and earthquake motion.

次に、前記周方向伸縮許容部11を設けた断熱カバー構造の詳細を示す。
[第1実施形態]
図1~図5に示すように、前記断熱材2が珪酸カルシウムから成る多孔質の成型体を主体とするものであり、周方向伸縮許容部11が流体配管装置1の周方向に凹凸の蛇腹部11Aを設けて構成してある。
前記蛇腹部は、断熱材用外装材3に設けてあり、流体配管装置1の膨張に伴って、その流体配管装置1を外周部全体を覆う断熱材全体の外径が増大するのを許容するように、蛇腹部11Aが伸びて断熱材用外装材3全体の外径が増大できる(図5(a)→図5(b))ように構成してある。
Next, the structure of the heat insulating cover provided with the circumferentially expandable portion 11 will be described in detail.
[First embodiment]
As shown in Figures 1 to 5, the insulating material 2 is mainly composed of a porous molded body made of calcium silicate, and the circumferential expansion and contraction allowing portion 11 is configured by providing an uneven bellows portion 11A in the circumferential direction of the fluid piping device 1.
The bellows portion is provided in the insulation sheathing 3, and is configured so that the bellows portion 11A can stretch and increase the outer diameter of the entire insulation sheathing 3 (Figure 5(a) → Figure 5(b)) to allow the outer diameter of the entire insulation covering the entire outer periphery of the fluid piping device 1 to increase as the fluid piping device 1 expands.

[第2実施形態]
前記周方向伸縮許容部11は、図6~図7に示すように、長手目地シール用帯状体4Aに蛇腹部11Aを形成してもよい。
そして、流体配管装置1の膨張に伴って、その流体配管装置1を外周部全体を覆う断熱材2全体の外径が増大するのを許容するように、蛇腹部11Aが伸びて断熱材用外装材3全体で覆う被覆部の外径が増大できる(図6(a)→(b)、図7(a)→(b))のように構成してある。
尚、断熱材用外装材3の周方向における端部同士は、互いに重なるように断熱材2の外側に装着する場合(図7)と、端部同士突き合わせる場合(図6)とがある。
[Second embodiment]
The circumferentially expandable portion 11 may be a bellows portion 11A formed in the longitudinal joint sealing band 4A as shown in Figs.
The bellows portion 11A expands to allow the outer diameter of the covering portion covering the entire insulating outer periphery 3 to increase as the fluid piping device 1 expands (FIG. 6(a) → (b), FIG. 7(a) → (b)), so as to allow the outer diameter of the entire insulating material 2 covering the entire outer periphery of the fluid piping device 1 to increase.
The ends of the thermal insulation exterior material 3 in the circumferential direction may be attached to the outside of the thermal insulation material 2 so as to overlap each other (FIG. 7), or may be butted against each other (FIG. 6).

施工を楽に行うために、長手目地シール用帯状体4Aに蛇腹部11Aを形成するためには、図8及び図9に示すように、径方向に伸縮可能な紐状のスポンジ20を配管長手方向に沿わせ、その上から長手目地シール用帯状体4Aを接着すれば効率よく蛇腹部11Aを形成することができる。 To facilitate construction and form the bellows portion 11A on the longitudinal joint sealing band 4A, as shown in Figures 8 and 9, a radially expandable string-shaped sponge 20 is placed along the longitudinal direction of the pipe, and the longitudinal joint sealing band 4A is then glued on top of it, allowing the bellows portion 11A to be formed efficiently.

[第3実施形態]
図10~図11に示すように、前記周方向伸縮許容部11は、前記長手目地シール用帯状体4Aによる断熱材用外装材3の周方向の両端部どうしの一体化部に、前記周方向に弾性変形自在なクッション材21を介在して形成してある。
クッション材21により、断熱材用外装材の周方向の両端部どうしがずれて離間しようとしても、クッション材21の変形により吸収して、断熱材用外装材3の両端部どうしの一体化が維持されて、断熱カバー構造による断熱性能を高く維持できる。
尚、クッション材21は、図10(a)、(b)のように、断熱材用外装材3の周方向の両端部どうしの間に設ける場合と、図11(a)、(b)のように、断熱材用外装材3の周方向の両端部どうしと長手目地シール用帯状体4Aとの間に設けてある場合、または、それらの双方に設けてある場合(図外)がある。
[Third embodiment]
As shown in Figures 10 to 11, the circumferential expansion and contraction allowance portion 11 is formed at the integrated portion between both circumferential ends of the insulation exterior material 3 made of the longitudinal joint sealing band 4A, by interposing a cushion material 21 that is elastically deformable in the circumferential direction.
Even if the cushion material 21 causes both circumferential ends of the insulation exterior material to shift and separate, this is absorbed by deformation of the cushion material 21, and the integration of both ends of the insulation exterior material 3 is maintained, thereby maintaining high insulation performance due to the insulation cover structure.
The cushion material 21 may be provided between both circumferential ends of the insulation exterior material 3 as shown in Figures 10(a) and (b), or between both circumferential ends of the insulation exterior material 3 and the longitudinal joint sealing strip 4A as shown in Figures 11(a) and (b), or may be provided on both of these (not shown).

〔別実施形態〕
以下に他の実施の形態を説明する。
なお、以下の他の実施形態において、上記実施形態と同様の部材には同一の符号を附してある。
〈1〉 前述の断熱材用外装材3は、アルミ箔厚さ42μmで全体シート厚0.33mmの物を使用する場合があり、アルミ箔厚さ5~70μmで且つ全体シート厚さ0.2~0.50mmのものを使用するのが適切である。
また、前述の帯状体4A、4Bは、テープ全体の厚さ0.035~0.050mmの物が使用するのに適切である。
〈2〉 前記難燃性樹脂基材としては、難燃性ポリ塩化ビニル樹脂8以外に、更に不燃性を要求される場合にはガラスクロスを主材とする層であってもよい。
〈3〉前記断熱材2と断熱材用外装材3とは予め接着して一体化してあってもよく、この場合、前記断熱材用外装材3に、前記断熱材2に対して一体に接着してある接着部と、非接着部とを設け、前記非接着部に前記周方向伸縮許容部11を設けてある。
〈4〉 図12(a)、(b)に示すように、前記流体配管装置1の周方向に隣接する前記断熱材2の突合せ端部間に、ロックウールやグラスウール等の伸縮自在な耐熱性断熱材14を圧縮した状態で介在させてあれば(図12(a))、温度変化に基づいて配管が径方向に膨張しても、断熱材2同士の突合せ端部間の目地には隙間が発生しにくく(図12(b))、断熱性能を高く維持できる。
〈5〉 前記断熱材2としては、珪酸カルシウムからなる多孔質の成型体に代えて、パーライト、発泡ガラスからなるものや、グラスウール、ロックウールなどの無機繊維材から成るものでもよい。
〈6〉 前記耐熱性断熱材14としては、ロックウール、グラスウールの他に、生体溶解性繊維を使用してもよい。
〈7〉 断熱材2と流体配管装置1との間で線膨張係数に大きな差があって、高温流体の通流に基づいて、例え流体配管装置1が大きく伸長して、隣接する断熱材2同士の突合せ目地部に隙間が発生して熱リークが発生しやすくなるのを防止するためには、図13に示すように、前記断熱材2の内側で、前記流体配管装置1との間に、前記断熱材2及び前記流体配管装置1と非接着の状態で補助断熱材15を配置し、前記流体配管装置1の周方向に隣接する前記断熱材2同士の突合せ目地部と、前記補助断熱材15同士の突合せ目地部とを、前記流体配管装置1の周方向に位置ずれさせて配設する。
〈8〉 周方向伸縮許容部11の形状は、前述の凹凸の蛇腹部11Aを設ける以外の形状でもよい。
〈9〉断熱材2と断熱材用外装材3との間には、図14に示すように、アルミニウム箔を主体とする断熱シート22を介在してあってもよい。
尚、図中23は、両面テープであり、断熱材2は、グラスウールやロックウールから成る無機繊維材で形成してある例を示してある。
[Another embodiment]
Other embodiments will be described below.
In the following other embodiments, the same components as those in the above embodiment are denoted by the same reference numerals.
<1> The aforementioned insulating exterior material 3 may have an aluminum foil thickness of 42 μm and an overall sheet thickness of 0.33 mm, and it is appropriate to use an aluminum foil thickness of 5 to 70 μm and an overall sheet thickness of 0.2 to 0.50 mm.
Moreover, the above-mentioned band-shaped bodies 4A and 4B are suitable for use when the overall tape thickness is 0.035 to 0.050 mm.
<2> The flame-retardant resin substrate may be a layer mainly made of glass cloth in addition to the flame-retardant polyvinyl chloride resin 8 when further flame resistance is required.
<3> The heat insulating material 2 and the exterior material for heat insulating material 3 may be bonded together in advance to form an integrated body. In this case, the exterior material for heat insulating material 3 has an adhesive portion that is integrally bonded to the heat insulating material 2 and a non-adhesive portion, and the circumferential expansion-permitting portion 11 is provided in the non-adhesive portion.
<4> As shown in Figures 12(a) and (b), if a flexible heat-resistant insulating material 14 such as rock wool or glass wool is interposed in a compressed state between the butt ends of the insulating materials 2 that are adjacent to each other in the circumferential direction of the fluid piping device 1 (Figure 12(a)), even if the piping expands radially due to temperature changes, gaps are unlikely to occur in the joints between the butt ends of the insulating materials 2 (Figure 12(b)), and high insulating performance can be maintained.
<5> The heat insulating material 2 may be made of perlite, foamed glass, or inorganic fiber material such as glass wool or rock wool, instead of a porous molded body made of calcium silicate.
<6> As the heat-resistant insulating material 14, in addition to rock wool and glass wool, biosoluble fibers may be used.
<7> In order to prevent a large difference in linear expansion coefficient between the insulating material 2 and the fluid piping device 1, and for example the fluid piping device 1 expanding significantly due to the flow of high-temperature fluid, resulting in gaps being generated at the butt joints between adjacent insulating materials 2 and making heat leaks more likely to occur, as shown in Figure 13, an auxiliary insulating material 15 is arranged between the insulating material 2 and the fluid piping device 1 on the inside of the insulating material 2 without being bonded to the insulating material 2 and the fluid piping device 1, and the butt joints between the insulating materials 2 adjacent in the circumferential direction of the fluid piping device 1 and the butt joints between the auxiliary insulating materials 15 are arranged so as to be misaligned in the circumferential direction of the fluid piping device 1.
<8> The shape of the circumferentially expandable portion 11 may be a shape other than the shape having the uneven bellows portion 11A described above.
<9> As shown in FIG. 14, a heat insulating sheet 22 mainly made of aluminum foil may be interposed between the heat insulating material 2 and the exterior packaging material 3.
In the figure, reference numeral 23 denotes a double-sided tape, and the heat insulating material 2 is shown as an example formed from an inorganic fiber material such as glass wool or rock wool.

尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本発明は添付図面の構成に限定されるものではない。また、本発明の要旨を逸脱しない範囲において、種々なる態様で実施し得ることは勿論である。 As mentioned above, the reference numerals are used for ease of comparison with the drawings, but the present invention is not limited to the configurations shown in the attached drawings. Furthermore, it goes without saying that the present invention can be embodied in various forms without departing from the spirit of the invention.

1 流体配管装置
2 断熱材
3 断熱材用外装材
4A 長手目地シール用帯状体
11 周方向伸縮許容部
Reference Signs List 1 Fluid piping device 2 Thermal insulation material 3 Exterior material for thermal insulation material 4A Belt for longitudinal joint sealing 11 Circumferential expansion and contraction allowance portion

Claims (2)

常温より高い高温流体を通流させる流体配管装置の外周部を、全周にわたって覆う無機材から成型された断熱材を設け、
前記断熱材を前記流体配管装置の周囲に沿う筒形状に形成するとともに、
筒形状の前記断熱材を周方向に分割して周方向分割断熱材を形成し、
前記流体配管装置の外周部全体を覆うように複数の前記周方向分割断熱材を装着した状態で、
前記周方向分割断熱材の外側に、非透水性の断熱材用外装材を被覆して断熱被覆可能に構成し、
前記断熱材用外装材を、合成樹脂フィルムの層厚内に金属層を備えた可撓性及び弾性のある金属ラミネートシートから構成し、
前記断熱材を被覆する前記断熱材外装材の内側を断熱性能や防水性能に支障が発生するのを防止すべく
前記周方向における前記断熱材用外装材の両端部どうしを前記流体配管装置の長手方向に沿って粘着剤を介して一体化する長手目地シール用帯状体を設け、
前記断熱材用外装材における前記長手目地シール用帯状体の近傍に、径方向外方に突出した蛇腹部を前記流体配管装置の長手方向に沿って設けて、
前記流体配管装置の周方向に伸縮自在な周方向伸縮許容部に形成し、
前記断熱材用外装材において前記蛇腹部または前記長手目地シール用帯状体の近傍以外の個所は、前記断熱材の外表面の筒形状に沿う形状に形成してあり、
前記断熱材用外装材に、前記断熱材に対して一体に接着してある接着部と、非接着部とを設け、前記非接着部に前記周方向伸縮許容部を設けてある断熱カバー構造。
A heat insulating material molded from an inorganic material is provided to cover the entire outer periphery of a fluid piping device through which a high-temperature fluid having a temperature higher than room temperature flows;
The heat insulating material is formed into a cylindrical shape that fits around the fluid piping device,
The cylindrical heat insulating material is divided in a circumferential direction to form a circumferentially divided heat insulating material;
In a state where the plurality of circumferentially divided heat insulating materials are attached so as to cover the entire outer periphery of the fluid piping device,
The outer side of the circumferentially divided insulation material is covered with a non-permeable insulation exterior material to be configured to be thermally insulated;
The insulation exterior material is composed of a flexible and elastic metal laminate sheet having a metal layer within the thickness of a synthetic resin film,
A longitudinal joint sealing band is provided to integrate both ends of the insulation exterior material in the circumferential direction along the longitudinal direction of the fluid piping device via an adhesive in order to prevent the insulation performance and waterproof performance of the inside of the insulation exterior material that covers the insulation material from being impaired,
A bellows portion protruding radially outward is provided along the longitudinal direction of the fluid piping device in the vicinity of the longitudinal joint sealing band in the thermal insulation exterior material,
The fluid piping device is formed in a circumferentially expandable portion that is expandable in the circumferential direction,
In the thermal insulation exterior material, a portion other than the bellows portion or the vicinity of the longitudinal joint sealing band is formed into a shape that follows the cylindrical shape of the outer surface of the thermal insulation material,
The insulation cover structure has an adhesive portion that is integrally adhered to the insulation material and a non-adhesive portion, and the non-adhesive portion is provided with the circumferential expansion and contraction permitted portion.
前記断熱材が珪酸カルシウムから成る多孔質の成型体を主体とするものである請求項1に記載の断熱カバー構造。 The heat-insulating cover structure according to claim 1, wherein the heat-insulating material is mainly a porous molded body made of calcium silicate.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001132890A (en) 1999-11-02 2001-05-18 Meisetsu:Kk Surface decorative cover for piping
JP2021001659A (en) 2019-06-21 2021-01-07 日清紡ケミカル株式会社 Thermal insulation material for cold insulation of low-temperature fluid transport piping

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001132890A (en) 1999-11-02 2001-05-18 Meisetsu:Kk Surface decorative cover for piping
JP2021001659A (en) 2019-06-21 2021-01-07 日清紡ケミカル株式会社 Thermal insulation material for cold insulation of low-temperature fluid transport piping

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