JP2011038594A

JP2011038594A - Using method of vacuum heat insulating material and the vacuum heat insulating material

Info

Publication number: JP2011038594A
Application number: JP2009186595A
Authority: JP
Inventors: Takeo Jinno; 武男神野; Takashi Tono; 隆東野; Toyohiko Takatsuki; 豊彦高槻
Original assignee: Zojirushi Corp
Current assignee: Zojirushi Corp
Priority date: 2009-08-11
Filing date: 2009-08-11
Publication date: 2011-02-24
Anticipated expiration: 2029-08-11
Also published as: JP5307662B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a using method of a vacuum heat insulating material and the vacuum heat insulating material capable of inexpensively achieving heat insulation under the hydrogen atmosphere. <P>SOLUTION: In this using method of the vacuum heat insulating material (heat insulating panel 10), first and second plate parts (closed plate parts) are positioned with a prescribed interval, a heat insulated space 30 closed by them is evacuated, and a getter 34 is arranged for absorbing gas existing free in the heat insulated space 30. The first plate part 14 is arranged in a heat insulation target side (an outer wall 2 of a heat treatment furnace 1) under the hydrogen atmosphere in order to achieve heat insulation from the side of the second plate part, and when hydrogen passes through the first plate part and a degree of vacuum in the heat insulated space 30 is decreased, hydrogen in the heat insulated space 30 is made to pass to the outside by heating under a non-hydrogen atmosphere, and the degree of vacuum is reproduced. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、水素雰囲気下で断熱を図るための真空断熱材の使用方法およびその真空断熱材に関するものである。 The present invention relates to a method of using a vacuum heat insulating material for heat insulation in a hydrogen atmosphere and the vacuum heat insulating material.

従来より熱処理炉の外壁やタンクの外表面には、外部（大気）との断熱を図るために断熱構造が施されている。同様に、近年開発されている燃料電池では、燃料となる水素の断熱を図るために断熱構造を施した容器が使用されている。 Conventionally, the outer wall of the heat treatment furnace and the outer surface of the tank have been provided with a heat insulating structure for heat insulation from the outside (atmosphere). Similarly, in fuel cells that have been developed in recent years, a container with a heat insulating structure is used to insulate hydrogen as a fuel.

これらの断熱構造には、真空断熱パネルや真空断熱容器を採用することが、小型（薄肉）化の点で有効である。しかし、これらの真空断熱材は、水素雰囲気下で加熱処理を行う熱処理炉や、水素を貯留するタンクおよび容器には適していない。即ち、水素は、真空断熱材の外装体から内部の断熱空間に透過する。そして、透過した水素はゲッターに吸着されるが、このゲッターが吸着能力を超えて飽和状態になると、内圧が上がって真空度（断熱性）を低下させ、断熱の目的を果たせなくなる。 For these heat insulating structures, it is effective to adopt a vacuum heat insulating panel or a vacuum heat insulating container in terms of downsizing (thinning). However, these vacuum heat insulating materials are not suitable for a heat treatment furnace that performs heat treatment in a hydrogen atmosphere, and a tank and container for storing hydrogen. That is, hydrogen permeate | transmits from the exterior body of a vacuum heat insulating material to the heat insulation space inside. The permeated hydrogen is adsorbed by the getter, but if this getter exceeds the adsorption capacity and becomes saturated, the internal pressure rises and the degree of vacuum (heat insulation) decreases, and the purpose of heat insulation cannot be achieved.

これに対して、特許文献１には、内部に水素が封入されたガス充填体の外側に真空二重構造の断熱体を配設し、これらの間に通気層（空間）を設け、この通気層に内容器を配設して水素の透過を抑制した断熱構造が記載されている。 On the other hand, in Patent Document 1, a heat insulating body having a vacuum double structure is disposed outside a gas filling body in which hydrogen is sealed inside, and a ventilation layer (space) is provided between them. A heat insulating structure is described in which an inner container is disposed in the layer to suppress permeation of hydrogen.

しかしながら、この特許文献１の断熱構造は、断熱体への水素の透過を抑制することは可能であるが、やはり徐々に水素が断熱体の断熱空間に透過し、真空度が低下する。そして、真空度が低下して断熱の目的が果たせなくなると、全ての断熱体を交換する必要があるため、多大な交換費用が必要になる。この問題は、表面積が大きい熱処理炉の場合に顕著に現れる。 However, although the heat insulation structure of Patent Document 1 can suppress the permeation of hydrogen to the heat insulator, the hydrogen gradually permeates the heat insulation space of the heat insulator and the degree of vacuum decreases. And if the degree of vacuum falls and the purpose of heat insulation cannot be fulfilled, since it is necessary to replace all the heat insulators, a great replacement cost is required. This problem appears remarkably in the case of a heat treatment furnace having a large surface area.

特開２００５−９５５３号公報Japanese Patent Laid-Open No. 2005-9553

本発明は、水素雰囲気下での断熱を安価に実現可能な真空断熱材の使用方法およびその真空断熱材を提供することを課題とするものである。 This invention makes it a subject to provide the usage method of the vacuum heat insulating material which can implement | achieve the heat insulation in hydrogen atmosphere cheaply, and its vacuum heat insulating material.

前記課題を解決するため、本発明の真空断熱材の使用方法は、所定間隔をもって位置する第１および第２板部を有し、これらにより閉じられた断熱空間を真空排気するとともに、該断熱空間内に遊離するガスを吸収するゲッターを配設した真空断熱材の使用方法であって、前記第１板部を水素雰囲気下にある断熱対象側に配置して前記第２板部の側との断熱を図り、水素が前記第１板部を透過して前記断熱空間の真空度が低下すると、非水素雰囲気下で加熱することにより、前記断熱空間内の水素を外部に透過させて真空度を再生させる構成としている。 In order to solve the above-mentioned problem, the method of using the vacuum heat insulating material according to the present invention includes first and second plate portions positioned at a predetermined interval, and evacuates the heat-insulating space closed by the first and second plate portions. It is a method of using a vacuum heat insulating material provided with a getter that absorbs a gas liberated therein, wherein the first plate portion is disposed on a heat insulation target side under a hydrogen atmosphere, and the second plate portion side When heat insulation is achieved and hydrogen passes through the first plate portion and the vacuum degree of the heat insulation space decreases, heating in a non-hydrogen atmosphere allows hydrogen in the heat insulation space to permeate to the outside, thereby reducing the vacuum degree. It is configured to reproduce.

この使用方法によれば、断熱空間に水素が透過することにより真空度が低下して目的の断熱性能が得られなくなると、非水素雰囲気下で真空断熱材を加熱することにより、水素分圧によって断熱空間内の水素を外部に放出することができる。その結果、真空断熱材の真空度を再生し、目的の断熱性能を復元できる。よって、水素雰囲気下で処理を行う熱処理炉や水素を貯留するタンクに採用しても、断熱設備に必要な経費を低減できる。また、大型の熱処理炉やタンクに真空断熱材を使用することにより、設備の断熱壁の薄肉化を図ることができる。 According to this method of use, when hydrogen permeates into the heat insulation space, the degree of vacuum is lowered and the desired heat insulation performance cannot be obtained. By heating the vacuum heat insulating material in a non-hydrogen atmosphere, the hydrogen partial pressure is increased. Hydrogen in the adiabatic space can be released to the outside. As a result, the degree of vacuum of the vacuum heat insulating material can be regenerated and the intended heat insulating performance can be restored. Therefore, even if it employs a heat treatment furnace that performs treatment in a hydrogen atmosphere or a tank that stores hydrogen, the cost required for heat insulation equipment can be reduced. Moreover, by using a vacuum heat insulating material for a large heat treatment furnace or tank, it is possible to reduce the thickness of the heat insulating wall of the facility.

この真空断熱材の使用方法では、前記真空断熱材を、断熱対象からの被加熱温度より高い温度で加熱して再生することが好ましい。このようにすれば、再生に必要な時間を短縮できる。 In this method of using the vacuum heat insulating material, it is preferable to regenerate the vacuum heat insulating material by heating it at a temperature higher than the temperature to be heated from the heat insulating object. In this way, the time required for reproduction can be shortened.

また、前記真空断熱材の第２板部に加熱手段を配設し、該加熱手段で第２板部を加熱して再生することが好ましい。このようにすれば、真空断熱材を設備に取り付けたままの状態で再生することが可能になる。
または、前記真空断熱材を、加熱炉内で加熱して再生することが好ましい。このようにすれば、複数の真空断熱材を纏めて再生することができるうえ、個別に加熱手段を設ける必要がないため、コスト高になることを防止できる。
または、前記真空断熱材を、非水素雰囲気とした断熱対象により加熱して再生することが好ましい。このようにすれば、個別に加熱手段を設ける必要がないため、コスト高になることを防止できるうえ、取り外しや取り付けの作業が不要であるため、作業性を向上できる。 Moreover, it is preferable to arrange | position a heating means to the 2nd board part of the said vacuum heat insulating material, and heat and reproduce a 2nd board part with this heating means. If it does in this way, it will become possible to reproduce in the state where the vacuum heat insulating material was attached to equipment.
Alternatively, it is preferable to regenerate the vacuum heat insulating material by heating in a heating furnace. In this way, it is possible to regenerate a plurality of vacuum heat insulating materials together, and it is not necessary to separately provide heating means, so that an increase in cost can be prevented.
Alternatively, it is preferable to regenerate the vacuum heat insulating material by heating with a heat insulating object in a non-hydrogen atmosphere. In this way, since it is not necessary to provide heating means individually, it is possible to prevent the cost from being increased, and it is possible to improve the workability because there is no need for removal and attachment work.

なお、この真空断熱材は、所定間隔をもって位置する第１および第２板部を有し、これらにより閉じられた断熱空間を真空排気するとともに、該断熱空間内に遊離するガスを吸収するゲッターを配設し、前記第１板部を水素雰囲気下にある断熱対象側に配置する真空断熱材であって、前記第２板部の外面に加熱手段を配設したものである。
この真空断熱材は、断熱性能が低下すると、加熱手段を動作させることにより自己再生させることができるため、再生作業性を向上できる。 The vacuum heat insulating material has first and second plate portions positioned at a predetermined interval, and evacuates the heat insulating space closed by them, and also has a getter that absorbs the gas released into the heat insulating space. It is a vacuum heat insulating material that is disposed and disposed on the heat insulation target side under a hydrogen atmosphere, and a heating means is disposed on the outer surface of the second plate portion.
When the heat insulating performance is deteriorated, the vacuum heat insulating material can be regenerated by operating the heating means, so that the regenerating workability can be improved.

この真空断熱材では、前記ゲッターを、前記第２板部に対して前記加熱手段の内面側に位置するように配設することが好ましい。このようにすれば、ゲッターが吸着した水素を確実に放出させることができる。 In this vacuum heat insulating material, it is preferable that the getter is disposed so as to be positioned on the inner surface side of the heating means with respect to the second plate portion. In this way, hydrogen absorbed by the getter can be reliably released.

また、前記第１板部および第２板部は、異なる材質の金属材料または無機材料からなり、前記第２板部は、前記加熱手段による加熱状態で、水素の透過率が第１板部より高いものであることが好ましい。このようにすれば、非水素雰囲気側に断熱空間内の水素を放出する割合が増え、断熱性能が低下するまでの時間を長くすることができる。 Further, the first plate portion and the second plate portion are made of different metal materials or inorganic materials, and the second plate portion is heated by the heating means and has a hydrogen permeability higher than that of the first plate portion. It is preferable that it is high. If it does in this way, the rate which discharge | releases the hydrogen in heat insulation space to the non-hydrogen atmosphere side increases, and time until heat insulation performance falls can be lengthened.

本発明の真空断熱材の使用方法では、断熱空間に水素が透過することにより真空度が低下すると、非水素雰囲気下で真空断熱材を加熱することにより、断熱空間内の水素を外部に放出することができる。その結果、真空断熱材の真空度を再生して、目的の断熱性能を復元できる。よって、断熱するための設備費用を低減できる。 In the method of using the vacuum heat insulating material of the present invention, when the degree of vacuum is reduced due to permeation of hydrogen into the heat insulating space, hydrogen in the heat insulating space is released to the outside by heating the vacuum heat insulating material in a non-hydrogen atmosphere. be able to. As a result, the degree of vacuum of the vacuum heat insulating material can be regenerated to restore the target heat insulating performance. Therefore, the equipment cost for heat insulation can be reduced.

本発明に係る実施形態の真空断熱材である断熱パネルを熱処理炉に配設した状態を示す断面図である。It is sectional drawing which shows the state which has arrange | positioned the heat insulation panel which is the vacuum heat insulating material of embodiment which concerns on this invention in the heat processing furnace. 断熱パネルを示す断面図である。It is sectional drawing which shows a heat insulation panel. 断熱パネルの外装体を示す分解斜視図である。It is a disassembled perspective view which shows the exterior body of a heat insulation panel. 真空排気前の断熱パネルを示す斜視図である。It is a perspective view which shows the heat insulation panel before evacuation. 真空排気後の断熱パネルを示す斜視図である。It is a perspective view which shows the heat insulation panel after evacuation. 図１の要部拡大断面図である。It is a principal part expanded sectional view of FIG. 金属材料と水素の透過率を示すグラフである。It is a graph which shows the transmittance | permeability of a metal material and hydrogen. 真空断熱材の変形例である断熱容器を示す断面図である。It is sectional drawing which shows the heat insulation container which is a modification of a vacuum heat insulating material. 真空断熱材の他の変形例である断熱容器を示す断面図である。It is sectional drawing which shows the heat insulation container which is the other modification of a vacuum heat insulating material.

以下、本発明の実施の形態を図面に従って説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明に係る実施形態の真空断熱材を使用した熱処理炉１を示す。この熱処理炉１は、水素雰囲気下でバーナー等によって約１０００℃に加熱することにより、所定の非処理物を熱処理するもので、その外壁２は断熱材により構成されている。この断熱材はセラミックボードからなり、その壁厚は、目的の断熱温度で決定される。本実施形態では、約４０℃まで断熱する構成としており、この断熱性能を断熱材だけで得るには、約５０ｃｍの壁厚が必要である。そこで、本実施形態では、約３５０℃まで断熱可能な壁厚で構成し、残りを３１０℃を真空断熱材により断熱する構成としている。これにより、断熱材の壁厚を、半分以下の約２０ｃｍに薄肉化できるように構成している。 FIG. 1 shows a heat treatment furnace 1 using a vacuum heat insulating material according to an embodiment of the present invention. This heat treatment furnace 1 heats a predetermined non-processed material by heating to about 1000 ° C. with a burner or the like under a hydrogen atmosphere, and its outer wall 2 is made of a heat insulating material. This heat insulating material consists of a ceramic board, and its wall thickness is determined by the target heat insulating temperature. In this embodiment, it is set as the structure insulated to about 40 degreeC, In order to obtain this heat insulation performance only with a heat insulating material, the wall thickness of about 50 cm is required. Therefore, in the present embodiment, the wall thickness can be insulated up to about 350 ° C., and the remaining 310 ° C. is insulated by a vacuum heat insulating material. Thereby, it is comprised so that the wall thickness of a heat insulating material can be thinned to about 20 cm of less than half.

図２乃至図６は、本実施形態に係る真空断熱材である断熱パネル１０を示す。この断熱パネル１０は、図２に示すように、外装体を構成する第１外装部材１１および第２外装部材１８と、これらにより形成される断熱空間３０，３１に配設するコア材３３とを備えている。この断熱パネル１０の外周部には、第１膨出部１２の膨出方向に沿って屈曲させた屈曲部３２が設けられている。また、断熱パネル１０は、コア材３３を配設した内部の断熱空間３０，３１を、真空排気した真空断熱パネルとして構成されている。さらに、第２外装部材１８の外面には、加熱手段であるマイカヒータ３５が配設されている。 2 thru | or 6 shows the heat insulation panel 10 which is a vacuum heat insulating material which concerns on this embodiment. As shown in FIG. 2, the heat insulation panel 10 includes a first exterior member 11 and a second exterior member 18 constituting an exterior body, and a core material 33 disposed in the heat insulation spaces 30 and 31 formed by these. I have. A bent portion 32 that is bent along the bulging direction of the first bulging portion 12 is provided on the outer peripheral portion of the heat insulating panel 10. Moreover, the heat insulation panel 10 is comprised as a vacuum heat insulation panel which evacuated the heat insulation space 30 and 31 inside which the core material 33 was arrange | positioned. Further, a mica heater 35 as a heating unit is disposed on the outer surface of the second exterior member 18.

第１外装部材１１は、肉厚0.2〜1.0ｍｍの薄い金属板により形成された平面視正方形状のものである。この第１外装部材１１は、図３に示すように、中央に４隅を面取りした正方形状をなすように第１膨出部１２が設けられている。この第１膨出部１２は、第１断熱空間３０を形成するためのもので、面に対して直交方向に突出するように屈曲された外周面である第１立上板部１３と、該第１立上板部１３の外縁を閉塞する第１閉塞板部１４とを備えている。 The first exterior member 11 has a square shape in plan view formed by a thin metal plate having a thickness of 0.2 to 1.0 mm. As shown in FIG. 3, the first exterior member 11 is provided with a first bulging portion 12 so as to form a square shape with four corners chamfered at the center. The first bulging portion 12 is for forming the first heat insulation space 30, and is a first rising plate portion 13 that is an outer peripheral surface bent so as to protrude in a direction orthogonal to the surface, And a first closing plate portion 14 that closes the outer edge of the first rising plate portion 13.

また、真空排気前の第１外装部材１１は、第１膨出部１２の開口縁から膨出方向に対して直交方向に突出する第１フランジ部１５を備えている。この第１フランジ部１５は、外周縁の側に位置する第１接合部１６と、第１膨出部１２の側に位置する第１非接合部１７とを有する。これらは平面状をなすように連続しており、図３では仮想線によって区画して示しているが、実際には何ら区画されていない。 The first exterior member 11 before evacuation includes a first flange portion 15 that protrudes from the opening edge of the first bulging portion 12 in a direction orthogonal to the bulging direction. The first flange portion 15 has a first joint portion 16 located on the outer peripheral edge side and a first non-joint portion 17 located on the first bulge portion 12 side. These are continuous so as to form a planar shape, and in FIG. 3, they are indicated by imaginary lines, but are not actually divided at all.

第２外装部材１８は、第１外装部材１１と同様に、肉厚0.2〜1.0ｍｍの薄い金属板により形成された平面視正方形状のものである。この第１外装部材１１は、中央に正方形状をなすように、第１膨出部１２に対して逆向きに膨出する第２膨出部１９が設けられている。この第２膨出部１９は、第１膨出部１２とともに第１断熱空間３０を形成するためのもので、面に対して直交方向に突出するように屈曲された第２立上板部２０と、該第２立上板部２０の外縁を閉塞する第２閉塞板部２１とを備えている。そして、この第２閉塞部の中央には、内部の第１断熱空間３０に連通する円形状の排気孔２２が設けられ、この排気孔２２にチップ管２３が接合されている。 Similar to the first exterior member 11, the second exterior member 18 has a square shape in plan view formed of a thin metal plate having a thickness of 0.2 to 1.0 mm. The first exterior member 11 is provided with a second bulging portion 19 that bulges in the opposite direction with respect to the first bulging portion 12 so as to form a square shape in the center. The second bulging portion 19 is for forming the first heat insulating space 30 together with the first bulging portion 12, and is a second rising plate portion 20 bent so as to protrude in a direction orthogonal to the surface. And a second closing plate portion 21 that closes the outer edge of the second rising plate portion 20. A circular exhaust hole 22 communicating with the internal first heat insulation space 30 is provided at the center of the second closing portion, and a tip tube 23 is joined to the exhaust hole 22.

また、真空排気前の第２外装部材１８は、第２膨出部１９の開口縁から膨出方向に対して直交方向に突出する第２フランジ部２４を備えている。この第２フランジ部２４は、第１外装部材１１の第１フランジ部１５に重畳させて接合するためのもので、第１接合部１６に対応する第２接合部２５と、第１非接合部１７に対応する第２非接合部２６とを有する。第２非接合部２６は、第１断熱空間３０と連続する第２断熱空間３１を形成するためのもので、第２接合部２５から段状をなすように第２膨出部１９の膨出方向に膨出されている。この第２非接合部２６は、第２膨出部１９より膨出する寸法が小さく、本実施形態では、内部の第２断熱空間３１が約1.4〜7.0ｍｍの厚さで形成されるように構成している。また、第２非接合部２６は、打抜部２８の内縁に対して所定間隔をもって位置するように、膨出させていない凹陥部２７を備えている。この凹陥部２７内の平面部は第２接合部２５を構成する。また、凹陥部２７は、第１外装部材１１の第１立上板部１３の面取部１３ａに一致する。 In addition, the second exterior member 18 before evacuation includes a second flange portion 24 that protrudes from the opening edge of the second bulging portion 19 in a direction orthogonal to the bulging direction. The second flange portion 24 is for overlapping and joining to the first flange portion 15 of the first exterior member 11, and a second joint portion 25 corresponding to the first joint portion 16 and a first non-joint portion. 17 and a second non-joining portion 26 corresponding to 17. The second non-joining part 26 is for forming a second heat-insulating space 31 that is continuous with the first heat-insulating space 30, and the second bulging part 19 bulges out from the second joint part 25 so as to form a step shape. Bulges in the direction. The second non-joining portion 26 has a smaller bulging size than the second bulging portion 19, and in the present embodiment, the internal second heat insulating space 31 is formed with a thickness of about 1.4 to 7.0 mm. It is composed. Further, the second non-joining portion 26 includes a recessed portion 27 that is not bulged so as to be positioned at a predetermined interval with respect to the inner edge of the punched portion 28. The plane portion in the recessed portion 27 constitutes the second joint portion 25. The recessed portion 27 coincides with the chamfered portion 13 a of the first rising plate portion 13 of the first exterior member 11.

本実施形態では、第１膨出部１２は、対向する第１立上板部１３，１３間の幅、即ち第１膨出部１２の膨出方向と直交する方向の幅が、第２膨出部１９の第２立上板部２０，２０間の幅より広くなるように形成されている。即ち、第１膨出部１２は、各フランジ部１５，２４の突出方向に沿って、第２膨出部１９より幅広になるように形成されている。また、各外装部材１１，１８のフランジ部１５，２４の接合部１６，２５には、４隅に正方形状に打ち抜いた打抜部２８が設けられている。この打抜部２８は、内縁に沿ってフランジ部１５，２４を屈曲させて屈曲部３２を形成するためのものである。さらに、各フランジ部１５，２４の接合部１６，２５には、他の断熱パネル１０を横方向に連結するための連結孔２９が、所定間隔をもって複数設けられている。 In the present embodiment, the first bulging portion 12 has a width between the first rising plate portions 13, 13 facing each other, that is, a width in a direction perpendicular to the bulging direction of the first bulging portion 12. It is formed so as to be wider than the width between the second rising plate portions 20 and 20 of the protruding portion 19. That is, the first bulging portion 12 is formed to be wider than the second bulging portion 19 along the protruding direction of the flange portions 15 and 24. In addition, the joint portions 16 and 25 of the flange portions 15 and 24 of the exterior members 11 and 18 are provided with punched portions 28 punched in squares at four corners. The punched portion 28 is for forming the bent portion 32 by bending the flange portions 15 and 24 along the inner edge. Furthermore, a plurality of connecting holes 29 for connecting other heat insulating panels 10 in the lateral direction are provided in the joint portions 16 and 25 of the flange portions 15 and 24 at a predetermined interval.

これら第１および第２外装部材１１，１８からなる外装体は、各フランジ部１５，２４を接合することにより、図４に示すように、所定間隔をもって位置する第１膨出部１２の第１閉塞板部１４と第２膨出部１９の第２閉塞板部２１とで、１つの第１断熱空間３０が形成される。また、フランジ部１５，２４には非接合部１７，２６、特に、膨出して形成された第２非接合部２６により、第１断熱空間３０に連通する第２断熱空間３１が形成される。そして、この接合状態で、各フランジ部１５，２４には、第２膨出部１９に沿って屈曲させることにより屈曲部３２が設けられる。この屈曲部３２は、図５に示すように、打抜部２８により隣接する屈曲部３２に対して直交状態となる。本実施形態の屈曲部３２は、第１外装部材１１の第１膨出部１２と第１フランジ部１５の境界（屈曲）部分で折り曲げることにより、第２フランジ部２４の第２非接合部２６をＵ字形状をなすように屈曲させるとともに、第１膨出部１２の第１立上板部１３と第１フランジ部１５が平面状をなすように延びる構成としている。また、屈曲部３２は、屈曲後の上端位置が第２膨出部１９の第２閉塞板部２１より上方に突出しないように、フランジ部１５，２４を寸法設定している。なお、この屈曲部３２は、排気孔２２から内部の空気を排気した後、および、排気孔２２から内部の空気を排気する前のいずれでも形成することができるが、屈曲加工に伴うリークの発生、および、その検査を考慮すると、排気前に行うことが好ましい。 The exterior body composed of the first and second exterior members 11 and 18 joins the flange portions 15 and 24 to join the first bulge portions 12 positioned at predetermined intervals as shown in FIG. The first insulating space 30 is formed by the closing plate portion 14 and the second closing plate portion 21 of the second bulging portion 19. In addition, a second heat insulating space 31 that communicates with the first heat insulating space 30 is formed in the flange portions 15 and 24 by the non-joining portions 17 and 26, in particular, the second non-joining portion 26 formed to bulge. In this joined state, each of the flange portions 15 and 24 is provided with a bent portion 32 by being bent along the second bulging portion 19. As shown in FIG. 5, the bent portion 32 becomes orthogonal to the adjacent bent portion 32 by the punched portion 28. The bent portion 32 of the present embodiment is bent at the boundary (bent portion) between the first bulging portion 12 and the first flange portion 15 of the first exterior member 11, thereby the second non-joining portion 26 of the second flange portion 24. Are bent so as to form a U-shape, and the first rising plate portion 13 and the first flange portion 15 of the first bulging portion 12 extend so as to form a planar shape. In addition, the bent portions 32 have dimensions of the flange portions 15 and 24 so that the upper end position after bending does not protrude above the second closing plate portion 21 of the second bulging portion 19. The bent portion 32 can be formed either after exhausting the internal air from the exhaust hole 22 or before exhausting the internal air from the exhaust hole 22, but leakage due to the bending process occurs. In view of the inspection, it is preferable to perform it before exhaust.

ここで、外装部材１１，１８を構成するための金属は、図７に示すように、材質毎に水素の透過率が異なる。そして、この透過率は温度に依存しており、温度が高くなると透過も促進される。そこで、本実施形態では、第１外装部材１１を、鉄−クロム−ニッケルの合金であるＳＵＳ３０４からなるステンレスにより構成し、第２外装部材１８を、鉄−クロムの合金であるＳＵＳ４３０からなるステンレスにより構成している。これにより、これらのステンレスは、成分の違いにより透過率が異なり、ＳＵＳ４３０からなる第２外装部材１８が、ＳＵＳ３０４からなる第１外装部材１１より、同一加熱温度状態での水素の透過率が高くなるように構成している。 Here, the metal for constituting the exterior members 11 and 18 has different hydrogen permeability for each material, as shown in FIG. This transmittance depends on the temperature, and the transmission is promoted as the temperature increases. Therefore, in the present embodiment, the first exterior member 11 is made of stainless steel made of SUS304, which is an iron-chromium-nickel alloy, and the second exterior member 18 is made of stainless steel made of SUS430, which is an iron-chromium alloy. It is composed. Thereby, these stainless steels have different transmittances depending on the components, and the second exterior member 18 made of SUS430 has higher hydrogen permeability in the same heating temperature state than the first exterior member 11 made of SUS304. It is configured as follows.

コア材３３は、第１および第２外装部材１１，１８より熱伝導度が低く、弾性変形が可能なもので、第１断熱空間３０と第２断熱空間３１に配設される。本実施形態では、密度が約１００〜１６０ｋｇ／ｍ^３で、約２２０±３０ｋｇ／ｍ^３まで圧縮可能なセラミックウールを使用している。但し、コア材３３は、弾性変形可能なセラミックウールに限られず、第１断熱空間３０にはセラミックボードやセラミックボールなどの弾性的な変形が不可能なコア材３３を配設し、変形（屈曲）される第２断熱空間３１には弾性的な変形が可能なコア材３３を配設する構成としてもよい。また、これらセラミック系のコア材３３は、その耐熱温度が１２００℃であるため、高温加熱に最適であるが、被加熱温度が５００℃未満である場合には、グラスウールを適用してもよい。 The core material 33 has lower thermal conductivity than the first and second exterior members 11 and 18 and can be elastically deformed, and is disposed in the first heat insulation space 30 and the second heat insulation space 31. In the present embodiment, a density of about 100~160kg / ^{m 3,} using compressible ceramic wool up to about 220 ± 30kg / ^{m 3.} However, the core material 33 is not limited to elastically deformable ceramic wool, and the first heat insulating space 30 is provided with a core material 33 that cannot be elastically deformed, such as a ceramic board or a ceramic ball. The core material 33 that can be elastically deformed may be disposed in the second heat-insulating space 31. The ceramic core material 33 has a heat-resistant temperature of 1200 ° C. and is optimal for high-temperature heating. However, when the heating temperature is less than 500 ° C., glass wool may be applied.

この断熱パネル１０の内部には、遊離するガスを吸収するゲッター３４が配設されている。このゲッター３４は、約４５０℃に加熱することにより活性化して、断熱空間３０，３１内を遊離する水素（Ｈ）、一酸化炭素（ＣＯ）および水（Ｈ_２Ｏ）などのガスを吸収する周知のものである。このゲッター３４は、第２外装部材１８において、外面側に位置する第２閉塞板部２１の所定位置に接触するように配設されている。 Inside the heat insulation panel 10, a getter 34 that absorbs the liberated gas is disposed. The getter 34 is activated by heating to about 450 ° C. and absorbs gases such as hydrogen (H), carbon monoxide (CO), and water (H ₂ O) that are liberated in the heat insulating spaces 30 and 31. It is well known. The getter 34 is disposed in the second exterior member 18 so as to contact a predetermined position of the second closing plate portion 21 located on the outer surface side.

マイカヒータ３５は、ゲッター３４を配設した第２外装部材１８の第２閉塞板部２１の外面に配設され、この第２外装部材１８を加熱することにより、該第２外装部材１８は勿論、伝熱により第１外装部材１１も加熱するものである。また、マイカヒータ３５は、第２閉塞板部２１を挟んでゲッター３４と内外に対応する位置に配設されている。なお、マイカヒータ３５は、マイカ板にニクロム線を巻回した周知のもので、１３００Ｗの出力により第２閉塞板部２１を約８００℃に加熱できるものである。 The mica heater 35 is disposed on the outer surface of the second closing plate portion 21 of the second exterior member 18 in which the getter 34 is disposed, and by heating the second exterior member 18, the second exterior member 18 is, of course, The first exterior member 11 is also heated by heat transfer. The mica heater 35 is disposed at a position corresponding to the inside and outside of the getter 34 with the second closing plate portion 21 interposed therebetween. The mica heater 35 is a well-known one in which a nichrome wire is wound around a mica plate, and can heat the second closing plate portion 21 to about 800 ° C. with an output of 1300 W.

この断熱パネル１０を製造するには、第１外装部材１１、第２外装部材１８、コア材３３およびゲッター３４を配設する仮組ステップを実行した後、各外装部材１１，１８の外周部を接合する接合ステップを実行し、ついで、フランジ部１５，２４に屈曲部３２を形成する屈曲ステップを経て、内部の空気を排気する真空排気ステップを実行して製造される。 In order to manufacture this heat insulation panel 10, after performing the temporary assembly step which arrange | positions the 1st exterior member 11, the 2nd exterior member 18, the core material 33, and the getter 34, the outer peripheral part of each exterior member 11 and 18 is carried out. It manufactures by performing the joining step which joins, and then performing the vacuum exhaust step which exhausts the internal air through the bending step which forms the bending part 32 in the flange parts 15 and 24. FIG.

仮組ステップでは、第１外装部材１１の第１膨出部１２内にコア材３３を充填するとともに、第２外装部材１８の第２膨出部１９内および第２非接合部２６内にコア材３３を充填し、その状態で互いのフランジ部１５，２４が重畳するように配置して、各膨出部１２，１９を閉塞する。 In the temporary assembly step, the core material 33 is filled in the first bulging portion 12 of the first exterior member 11, and the core is embedded in the second bulging portion 19 and the second non-joining portion 26 of the second exterior member 18. The material 33 is filled, and in this state, the flange portions 15 and 24 are arranged so as to overlap each other, and the bulging portions 12 and 19 are closed.

接合ステップでは、重畳したフランジ部１５，２４の各非接合部１７，２６を除き、外周縁の側に位置する接合部１６，２５をシーム溶接によって全周にわたって接合する。これにより、図４に示すように、真空排気前の断熱パネル１０が形成される。 In the joining step, except for the non-joined portions 17 and 26 of the overlapping flange portions 15 and 24, the joined portions 16 and 25 located on the outer peripheral edge side are joined over the entire circumference by seam welding. Thereby, as shown in FIG. 4, the heat insulation panel 10 before evacuation is formed.

屈曲ステップでは、図５に示すように、第１外装部材１１の第１膨出部１２と第１フランジ部１５の屈曲部分を中心として、第１および第２外装部材１１，１８の各フランジ部１５，２４をそれぞれ第２膨出部１９の膨出方向に沿って屈曲させる。これにより、第２断熱空間３１を形成する第２非接合部２６は、塑性変形により若干容積が小さくなる部分が生じるが、第２断熱空間３１と第１断熱空間３０の連通状態は維持される。 In the bending step, as shown in FIG. 5, the flange portions of the first and second exterior members 11, 18 are centered on the bent portions of the first bulge portion 12 and the first flange portion 15 of the first exterior member 11. 15 and 24 are bent along the bulging direction of the second bulging portion 19, respectively. Thereby, the second non-joining portion 26 forming the second heat insulation space 31 has a portion whose volume is slightly reduced by plastic deformation, but the communication state between the second heat insulation space 31 and the first heat insulation space 30 is maintained. .

真空排気ステップでは、仮組した断熱パネル１０を加熱炉内に配置し、約４５０℃に加熱してゲッター３４を活性化しながら、第２外装部材１８に接合したチップ管２３を通して、真空にすべき内部の断熱空間３０，３１を排気する。これにより、内部を減圧しつつ、外装部材１１，１８から放出されたガスを排出する。この際、断熱空間３０，３１内にはコア材３３が配設されているが、コア材３３は繊維状をなすため、その隙間からガスを十分に排気することができる。そして、断熱空間３０，３１内が所定の真空度に達するとチップ管２３を封止する。なお、活性化したゲッター３４は、第１および第２外装部材１１，１８から放出され、遊離した水素などのガスを吸収し、所定の真空度を維持する役割をなす。 In the evacuation step, the heat-insulated panel 10 temporarily assembled is placed in a heating furnace and heated to about 450 ° C. to activate the getter 34, and the vacuum should be evacuated through the tip tube 23 joined to the second exterior member 18. The heat insulating spaces 30 and 31 inside are exhausted. Thus, the gas released from the exterior members 11 and 18 is discharged while the inside is decompressed. At this time, the core material 33 is disposed in the heat insulating spaces 30 and 31. Since the core material 33 has a fibrous shape, the gas can be sufficiently exhausted from the gap. When the inside of the heat insulating spaces 30 and 31 reaches a predetermined degree of vacuum, the tip tube 23 is sealed. Note that the activated getter 34 plays a role of absorbing a gas such as hydrogen released from the first and second exterior members 11 and 18 and maintaining a predetermined degree of vacuum.

最後に、このように製造した断熱パネル１０に対して、第２外装部材１８の第２閉塞板部２１にマイカヒータ３５を所定の固定具（図示せず）により固定する。この際、マイカヒータ３５は、前述のように、第２閉塞板部２１を挟んでゲッター３４の外面側に位置させる。 Finally, the mica heater 35 is fixed to the second closing plate portion 21 of the second exterior member 18 with a predetermined fixture (not shown) with respect to the heat insulating panel 10 manufactured as described above. At this time, the mica heater 35 is positioned on the outer surface side of the getter 34 with the second closing plate portion 21 interposed therebetween as described above.

このように製造した断熱パネル１０は、第２膨出部１９に沿って屈曲させた屈曲部３２を設けているため、この屈曲部３２の周辺での剛性を高めることができる。その結果、断熱パネル１０を断熱を目的とする外壁２に配設し、第１外装部材１１または第２外装部材１８が高温に曝されて延びが作用しても、その延びによる変形を屈曲部３２で抑えることができる。よって、全体が変形することに伴う断熱性能の低下を防止できる。 Since the heat insulating panel 10 manufactured in this manner is provided with the bent portion 32 bent along the second bulging portion 19, the rigidity around the bent portion 32 can be increased. As a result, even if the heat insulation panel 10 is disposed on the outer wall 2 for heat insulation and the first exterior member 11 or the second exterior member 18 is exposed to high temperature and the extension acts, the deformation due to the extension is bent. 32 can be suppressed. Therefore, it is possible to prevent a decrease in heat insulation performance due to the deformation of the whole.

また、本実施形態の断熱パネル１０は、第１外装部材１１と第２外装部材１８の両方に膨出部１２，１９を設け、第１外装部材１１の第１膨出部１２は横幅を広く形成するとともに、その境界部分で屈曲部３２を屈曲させる構成としている。そのため、図示のように、断熱パネル１０の外側面は平面状をなす。その結果、図６に示すように、複数の断熱パネル１０を敷設した際に、隣接する断熱パネル１０を密着させることができる。また、断熱パネル１０，１０間には、コア材３３が配設されていない領域が殆どなく、隣接する断熱パネル１０，１０の第２外装部材１１，１８の肉厚分だけとなる。よって、十分な断熱効果を得ることができる。しかも、本実施形態では、フランジ部１５，２４に連結孔２９を設け、隣接配置した断熱パネル１０，１０をボルトとナットで連結できるようにしているため、外壁２に敷設する際の取付作業性を向上できるとともに、敷設後の取付状態の安定性を向上できる。 Moreover, the heat insulation panel 10 of this embodiment provides the bulging parts 12 and 19 in both the 1st exterior member 11 and the 2nd exterior member 18, and the 1st bulge part 12 of the 1st exterior member 11 has wide width. In addition, the bent portion 32 is bent at the boundary portion. Therefore, as shown in the drawing, the outer surface of the heat insulation panel 10 is flat. As a result, as shown in FIG. 6, when a plurality of heat insulation panels 10 are laid, adjacent heat insulation panels 10 can be brought into close contact with each other. Moreover, there is almost no area | region where the core material 33 is not arrange | positioned between the heat insulation panels 10 and 10, and it becomes only the thickness of the 2nd exterior members 11 and 18 of the adjacent heat insulation panels 10 and 10. FIG. Therefore, a sufficient heat insulating effect can be obtained. In addition, in this embodiment, the connection holes 29 are provided in the flange portions 15 and 24 so that the adjacent heat insulating panels 10 and 10 can be connected by bolts and nuts. As well as the stability of the mounted state after laying.

このように製造された断熱パネル１０は、図示のように、断熱対象である熱処理炉１の断熱材からなる外壁２に、第１外装部材１１の第１閉塞板部１４が面接触するように敷設される。そして、この熱処理炉１は、内部に水素を充満させた水素雰囲気（約３５％）下で、バーナーによって加熱することにより非処理物を熱処理する。 As shown in the figure, the heat insulating panel 10 manufactured in this manner is such that the first closing plate portion 14 of the first exterior member 11 is in surface contact with the outer wall 2 made of the heat insulating material of the heat treatment furnace 1 to be insulated. Laid. And this heat processing furnace 1 heat-processes a non-processed material by heating with a burner in the hydrogen atmosphere (about 35%) which filled hydrogen inside.

この熱処理中には、内部の約１０００℃の熱が外壁２によって３５０℃まで断熱され、この３５０℃の熱が断熱パネル１０の第１外装部材１１の第１閉塞板部１４に加わる。そして、この断熱パネル１０では、真空排気した内部空間によって第２外装部材１８の第２閉塞板部２１の側が約４０℃になるように断熱する。また、この熱処理中には、内部の水素が断熱材からなる外壁２を透過して断熱パネル１０に至る。そのうち、一部の水素は、３５０℃に加熱されている断熱パネル１０の第１閉塞板部１４から断熱空間３０，３１に透過し、残りの水素は、隣接する断熱パネル１０，１０間の僅かな隙間から第２閉塞板部２１の側に漏出する。そして、断熱空間３０，３１に透過した水素は、ゲッター３４に吸着される。しかし、ゲッター３４が飽和状態になると、断熱パネル１０の断熱空間３０，３１の真空度が低下する。また、外部に漏出した水素は、熱処理炉１の既存の燃焼手段により燃焼される。 During this heat treatment, internal heat of about 1000 ° C. is insulated to 350 ° C. by the outer wall 2, and this heat of 350 ° C. is applied to the first closing plate portion 14 of the first exterior member 11 of the heat insulation panel 10. And in this heat insulation panel 10, it heat-insulates so that the 2nd closing board part 21 side of the 2nd exterior member 18 may become about 40 ° C by the evacuated internal space. Further, during this heat treatment, the internal hydrogen passes through the outer wall 2 made of a heat insulating material and reaches the heat insulating panel 10. Among them, some hydrogen permeates into the heat insulation spaces 30 and 31 from the first closing plate portion 14 of the heat insulation panel 10 heated to 350 ° C., and the remaining hydrogen is a little between the adjacent heat insulation panels 10 and 10. Leaks from the gap to the second closing plate 21 side. Then, the hydrogen that has permeated through the heat insulating spaces 30 and 31 is adsorbed by the getter 34. However, when the getter 34 is saturated, the degree of vacuum of the heat insulating spaces 30 and 31 of the heat insulating panel 10 decreases. Further, the hydrogen leaked to the outside is burned by the existing combustion means of the heat treatment furnace 1.

断熱パネル１０内に水素が透過することにより真空度が低下すると、外部である第２閉塞板部２１の側の温度が上昇する。この温度が例えば２００℃を越えると、断熱パネル１０の断熱パネル１０の断熱性能が低下したと判断し、メンテナンス（再生）作業を行う。 When the degree of vacuum decreases due to the permeation of hydrogen into the heat insulating panel 10, the temperature on the second closing plate portion 21 side that is outside increases. If this temperature exceeds 200 ° C., for example, it is determined that the heat insulation performance of the heat insulation panel 10 of the heat insulation panel 10 has deteriorated, and maintenance (regeneration) work is performed.

このメンテナンス作業では、まず、熱処理炉１内の水素を排気する。そして、この非水素雰囲気下で、熱処理炉１内をバーナーで加熱するとともに、マイカヒータ３５により第２外装部材１８を加熱する。これにより、各断熱パネル１０は、断熱対象である熱処理炉１の通常使用時の被加熱温度より高い温度で加熱される。 In this maintenance operation, first, hydrogen in the heat treatment furnace 1 is exhausted. Then, in this non-hydrogen atmosphere, the inside of the heat treatment furnace 1 is heated by a burner, and the second exterior member 18 is heated by the mica heater 35. Thereby, each heat insulation panel 10 is heated at temperature higher than the to-be-heated temperature at the time of normal use of the heat processing furnace 1 which is heat insulation object.

この状態では、断熱パネル１０内の水素濃度が、断熱パネル１０外の水素濃度より高い。そして、この状態で断熱パネル１０を加熱すると、外装部材１１，１８が３５０℃以上に加熱され、水素が透過し易い状態となる。また、第２閉塞板部２１を介してマイカヒータ３５によりゲッター３４が加熱され、吸着した水素を放出する。そして、水素分圧によって断熱空間３０，３１内の水素は外部に放出される。その結果、断熱パネル１０の断熱空間３０，３１の真空度が再生され、目的の断熱性能が復元される。 In this state, the hydrogen concentration in the heat insulation panel 10 is higher than the hydrogen concentration outside the heat insulation panel 10. And if the heat insulation panel 10 is heated in this state, the exterior members 11 and 18 will be heated to 350 degreeC or more, and it will be in the state which hydrogen permeate | transmits easily. Further, the getter 34 is heated by the mica heater 35 through the second closing plate portion 21 to release the adsorbed hydrogen. And the hydrogen in the heat insulation spaces 30 and 31 is discharge | released outside by hydrogen partial pressure. As a result, the degree of vacuum of the heat insulating spaces 30 and 31 of the heat insulating panel 10 is regenerated, and the target heat insulating performance is restored.

このように、本発明の使用方法では、水素雰囲気下で処理を行う熱処理炉１に真空排気した断熱パネル１０を採用し、使用により断熱性能が低下しても大規模な交換をすることなく、真空度を復元できる。よって、断熱設備に必要な経費を低減できる。また、この断熱パネル１０を採用した熱処理炉１は、断熱パネル１０が具備する断熱性能により外壁２を薄肉化できる。 Thus, in the method of use of the present invention, the heat-insulating panel 10 evacuated to the heat treatment furnace 1 that performs the treatment in a hydrogen atmosphere is adopted, and even if the heat-insulating performance is reduced due to use, without performing a large-scale replacement, The degree of vacuum can be restored. Therefore, the cost required for heat insulation equipment can be reduced. Further, the heat treatment furnace 1 employing the heat insulation panel 10 can reduce the thickness of the outer wall 2 by the heat insulation performance of the heat insulation panel 10.

しかも、本実施形態では、再生加熱時には、通常使用時の被加熱温度より高い温度で加熱するため、再生に必要な時間を短縮できる。また、加熱手段であるマイカヒータ３５を第２閉塞板部２１に配設し、このマイカヒータ３５と熱処理炉１により加熱するため、断熱パネル１０の取り外しや取り付けの作業することなく、設備に取り付けたままの状態で自己再生することができる。よって、再生作業性を向上できる。さらに、本実施形態では、第２外装部材１８の水素の透過率が第１外装部材１１の水素の透過率より高くなるように構成しているため、水素は主に断熱材がない第２外装部材１８から外部に放出される。よって、非水素雰囲気側に断熱空間３０，３１内の水素を放出する割合が増え、断熱性能が低下するまでの時間を長くすることができる。 Moreover, in the present embodiment, during regeneration heating, heating is performed at a temperature higher than the heating temperature during normal use, so that the time required for regeneration can be shortened. Further, the mica heater 35 as a heating means is disposed on the second closing plate portion 21 and heated by the mica heater 35 and the heat treatment furnace 1, so that the heat insulation panel 10 is not attached to the equipment without being removed or attached. Can self-regenerate in the state of. Therefore, the reproducibility can be improved. Furthermore, in the present embodiment, since the hydrogen permeability of the second exterior member 18 is configured to be higher than the hydrogen permeability of the first exterior member 11, the second exterior that does not mainly include a heat insulating material. Released from the member 18 to the outside. Therefore, the ratio of releasing hydrogen in the heat insulating spaces 30 and 31 to the non-hydrogen atmosphere side increases, and the time until the heat insulating performance is lowered can be lengthened.

なお、本発明の真空断熱材の使用方法および真空断熱材は、前記実施形態の構成に限定されるものではなく、種々の変更が可能である。 In addition, the usage method and vacuum heat insulating material of the vacuum heat insulating material of this invention are not limited to the structure of the said embodiment, A various change is possible.

例えば、前記実施形態では、各断熱パネル１０に個別に配設した加熱手段であるマイカヒータ３５と、断熱対象である熱処理炉１の両方で断熱パネル１０を再生加熱する構成としたが、いずれか一方のみとしてもよい。なお、マイカヒータ３５だけで再生加熱する構成としても前記と同様の作用および効果を得ることができる。一方、熱処理炉１だけで再生加熱する構成とした場合には、再生に必要な加熱時間は、熱処理を行った同等の時間が必要になるが、個別の加熱手段を設ける必要がないため、その分コストダウンを図ることができる。 For example, in the said embodiment, although it was set as the structure which reheats the heat insulation panel 10 in both the mica heater 35 which is the heating means arrange | positioned separately in each heat insulation panel 10, and the heat processing furnace 1 which is heat insulation object, either one It is good only as well. Note that the same operation and effect as described above can be obtained even when the regenerative heating is performed only by the mica heater 35. On the other hand, when it is configured to regenerate and heat only in the heat treatment furnace 1, the heating time necessary for regeneration is equivalent to the time when the heat treatment is performed, but it is not necessary to provide individual heating means. Cost reduction can be achieved.

また、断熱パネル１０に配設する加熱手段はマイカヒータ３５に限定されず、第２閉塞板部２１に誘導加熱コイルを配設するとともに、ゲッター３４の周辺に誘導加熱コイルへの高周波電流の通電時に生じる渦電流によって電磁誘導加熱される強磁性材料をコーティングや接合する構成としてもよい。 Further, the heating means provided in the heat insulation panel 10 is not limited to the mica heater 35, and an induction heating coil is provided in the second closing plate portion 21, and a high-frequency current is supplied to the induction heating coil around the getter 34. A ferromagnetic material that is electromagnetically heated by the generated eddy current may be coated or bonded.

さらに、断熱パネル１０は、断熱対象の外壁２から取り外し、加熱炉内で加熱して再生する構成としてもよい。このようにすれば、複数の真空断熱材を纏めて希望温度に加熱して再生加熱できるうえ、個別に加熱手段を設ける必要がないため、コストダウンを図ることができる。 Furthermore, the heat insulation panel 10 is good also as a structure which removes from the outer wall 2 of heat insulation object, heats and regenerates in a heating furnace. In this way, a plurality of vacuum heat insulating materials can be collectively heated to a desired temperature and reheated, and it is not necessary to separately provide heating means, so that the cost can be reduced.

また、前記実施形態では、第１外装部材１１と第２外装部材１８を金属材料により構成したが、無機材料により構成してもよい。 Moreover, in the said embodiment, although the 1st exterior member 11 and the 2nd exterior member 18 were comprised with the metal material, you may comprise with an inorganic material.

さらに、前記実施形態では、熱処理炉１の外壁２に断熱パネル１０を敷設するために、屈曲部３２を直交方向に屈曲させる構成したが、水素タンクのように平面視略円形状をなす外周壁に配設する場合には、連結状態で外周壁に沿って環状をなすように、屈曲部３２を所定角度で傾斜させて形成することが好ましい。 Furthermore, in the above embodiment, in order to lay the heat insulation panel 10 on the outer wall 2 of the heat treatment furnace 1, the bent portion 32 is bent in the orthogonal direction, but the outer peripheral wall having a substantially circular shape in plan view like a hydrogen tank. It is preferable that the bent portion 32 is inclined at a predetermined angle so as to form an annular shape along the outer peripheral wall in the connected state.

そして、前記実施形態では、本発明の真空断熱材を断熱パネル１０を用いて説明したが、有底筒状をなす真空二重容器であっても、同様の適用可能である。 And in the said embodiment, although the vacuum heat insulating material of this invention was demonstrated using the heat insulation panel 10, even if it is a vacuum double container which makes a bottomed cylindrical shape, the same application is possible.

具体的には、図８の変形例は、ガス充填体４０の断熱構造に適用する断熱体４１を示す。ガス充填体４０は、燃料電池の改質器の一部であり、内部に約７００℃の高温の水素が充填される。断熱体４１は、ステンレス鋼等の金属からなる内側部材４２と外側部材４３とを備え、その間に真空引きしてなる断熱空間４４が形成されている。この断熱空間４４には、前記と同様のゲッター４５が外側部材４３の内面に位置するように配設されている。そして、このゲッター４５と内外に対応するように、外側部材４３にはマイカヒータ４６が配設されている。これらガス充填体４０と断熱体４１との間には、多孔性材料であるセラミックボードからなる内層４７ａと石英ガラス板からなる外層４７ｂとで構成された内容器４７が配設されている。 Specifically, the modification of FIG. 8 shows a heat insulator 41 applied to the heat insulating structure of the gas filler 40. The gas filler 40 is a part of the reformer of the fuel cell, and is filled with high-temperature hydrogen at about 700 ° C. inside. The heat insulator 41 includes an inner member 42 and an outer member 43 made of a metal such as stainless steel, and a heat insulating space 44 formed by evacuation is formed therebetween. In the heat insulation space 44, a getter 45 similar to the above is disposed on the inner surface of the outer member 43. A mica heater 46 is disposed on the outer member 43 so as to correspond to the getter 45 and the inside and outside. Between the gas filling body 40 and the heat insulating body 41, an inner container 47 composed of an inner layer 47a made of a ceramic board which is a porous material and an outer layer 47b made of a quartz glass plate is disposed.

このガス充填体４０内に充填された水素は、ガス充填体４０を透過して破線矢印で示すように内容器４７の内層４７ａに入り、ここで拡散して濃度と温度が低下して上方に流動し、外部に排出されるので、断熱体４１の断熱空間４４にはほとんど透過しない。しかし、使用に従って徐々に水素の透過が進むと、やはり断熱空間４４の真空度が低下して目的の断熱性能を得ることができない。そのため、このような状況になると、ガス充填体４０から取り外して非水素雰囲気下でマイカヒータ４６を動作させることにより、前記と同様にして断熱空間４４の真空度を再生し、目的の断熱性能を復元できる。よって、断熱体４１を交換することなく、断熱体４１を使用し続けることができる。 The hydrogen filled in the gas filling body 40 permeates the gas filling body 40 and enters the inner layer 47a of the inner container 47 as indicated by a broken line arrow, where it diffuses and lowers in concentration and temperature. Since it flows and is discharged to the outside, it hardly penetrates into the heat insulating space 44 of the heat insulating body 41. However, if hydrogen permeation gradually proceeds according to use, the degree of vacuum of the heat insulation space 44 is also lowered, and the desired heat insulation performance cannot be obtained. Therefore, in such a situation, it is removed from the gas filling body 40 and the mica heater 46 is operated in a non-hydrogen atmosphere to regenerate the degree of vacuum of the heat insulating space 44 in the same manner as described above and restore the target heat insulating performance. it can. Therefore, it is possible to continue using the heat insulator 41 without replacing the heat insulator 41.

また、図９の変形例は、ガス充填体４０および内容器４７を用いることなく、直接内部に高温水素を収容するようにした真空二重容器５０を示す。この真空二重容器５０は、内容器５１と外容器５２とを備え、これらの間に断熱空間５３が形成されている。断熱空間５３には、外容器５２の内面に位置するようにゲッター５４が配設されている。また、外容器５２には、ゲッター５４と内外に対応するようにマイカヒータ５５が配設されている。そして、内容器５１と外容器５２の各口部５１ａ，５２ａは互いに接合され、その内部に別体の蓋５６が着脱可能に取り付けられている。この蓋５６は、蓋固定部材５７によって密閉状態が維持される。蓋固定部材５７は、蓋５６より大きいステンレス製の平板からなり、外容器５２の肩部に設けた非締付部５８に対してボルトを締め付けることにより、蓋５６を離脱不可能に固定できるようにしている。 Further, the modification of FIG. 9 shows a vacuum double container 50 in which high-temperature hydrogen is accommodated directly inside without using the gas filling body 40 and the inner container 47. The vacuum double container 50 includes an inner container 51 and an outer container 52, and a heat insulating space 53 is formed between them. A getter 54 is disposed in the heat insulating space 53 so as to be positioned on the inner surface of the outer container 52. The outer container 52 is provided with a mica heater 55 so as to correspond to the getter 54 and the inside and outside. And each mouth part 51a, 52a of the inner container 51 and the outer container 52 is mutually joined, and the separate lid | cover 56 is attached to the inside so that attachment or detachment is possible. The lid 56 is kept sealed by a lid fixing member 57. The lid fixing member 57 is made of a stainless steel plate larger than the lid 56, and the lid 56 can be fixed in a non-detachable manner by tightening a bolt against a non-clamping portion 58 provided on the shoulder portion of the outer container 52. I have to.

このように構成した真空二重容器５０は、内部に水素を収容すると、水素が内容器５１を透過して断熱空間５３に侵入する。そして、経時的に断熱空間５３の真空度を低下させる。そのため、所定の断熱性能が得られなくなると、内部の水素を排出して非水素雰囲気とした状態で、マイカヒータ５５を動作させることにより、前記と同様に、断熱空間５３の真空度を再生し、目的の断熱性能を復元できる。 When the vacuum double container 50 configured as described above contains hydrogen, the hydrogen permeates the inner container 51 and enters the heat insulating space 53. And the vacuum degree of the heat insulation space 53 is reduced with time. Therefore, when the predetermined heat insulation performance can no longer be obtained, the mica heater 55 is operated in a state in which the internal hydrogen is discharged to form a non-hydrogen atmosphere, thereby regenerating the degree of vacuum of the heat insulation space 53 as described above. The desired heat insulation performance can be restored.

なお、これら真空二重容器からなる真空断熱材も勿論、マイカヒータからなる加熱手段の代わりに、加熱炉内で加熱することにより、再生させてもよい。 Of course, the vacuum heat insulating material made of these vacuum double containers may be regenerated by heating in a heating furnace instead of the heating means made of mica heater.

１…熱処理炉（断熱対象）
２…外壁（断熱対象）
１０…断熱パネル（真空断熱材）
１１…第１外装部材
１４…第１閉塞板部（第１板部）
１８…第２外装部材
２１…第２閉塞板部（第２板部）
３０…第１断熱空間
３１…第２断熱空間
３３…コア材
３４…ゲッター
３５…マイカヒータ（加熱手段）
４０…ガス充填体（断熱対象）
４１…断熱体（真空断熱材）
４２…内側部材（第１板部）
４３…外側部材（第２板部）
４４…断熱空間
４５…ゲッター
４６…マイカヒータ（加熱手段）
５０…真空二重容器（真空断熱材）
５１…内容器（第１板部）
５２…外容器（第２板部）
５３…断熱空間
５４…ゲッター
５５…マイカヒータ（加熱手段） 1 ... Heat treatment furnace (for heat insulation)
2 ... Outer wall (insulation target)
10 ... Insulation panel (vacuum insulation)
DESCRIPTION OF SYMBOLS 11 ... 1st exterior member 14 ... 1st obstruction board part (1st board part)
18 ... 2nd exterior member 21 ... 2nd obstruction board part (2nd board part)
DESCRIPTION OF SYMBOLS 30 ... 1st heat insulation space 31 ... 2nd heat insulation space 33 ... Core material 34 ... Getter 35 ... Mica heater (heating means)
40 ... Gas filler (insulation target)
41 ... Insulator (vacuum insulation)
42 ... inner member (first plate part)
43 ... Outer member (second plate part)
44 ... heat insulation space 45 ... getter 46 ... mica heater (heating means)
50 ... Vacuum double container (vacuum insulation)
51 ... Inner container (first plate part)
52. Outer container (second plate part)
53 ... Insulated space 54 ... Getter 55 ... Mica heater (heating means)

Claims

Use of a vacuum heat insulating material having first and second plate portions positioned at a predetermined interval, evacuating a heat insulating space closed by these, and provided with a getter that absorbs a liberated gas in the heat insulating space A method,
The first plate portion is arranged on the heat insulation target side under a hydrogen atmosphere to achieve heat insulation with the second plate portion side, and hydrogen penetrates the first plate portion to reduce the vacuum degree of the heat insulation space. Then, the method of using a vacuum heat insulating material, wherein the degree of vacuum is regenerated by heating in a non-hydrogen atmosphere to allow hydrogen in the heat insulating space to permeate to the outside.

The method for using a vacuum heat insulating material according to claim 1, wherein the vacuum heat insulating material is regenerated by heating at a temperature higher than a temperature to be heated from a heat insulating object.

3. The vacuum heat insulating material according to claim 1, wherein heating means is disposed on the second plate portion of the vacuum heat insulating material, and the second plate portion is heated and regenerated by the heating means. 4. how to use.

The method for using a vacuum heat insulating material according to claim 1 or 2, wherein the vacuum heat insulating material is regenerated by heating in a heating furnace.

The method for using a vacuum heat insulating material according to claim 1 or 2, wherein the vacuum heat insulating material is heated and regenerated by a heat insulating object in a non-hydrogen atmosphere.

The first plate has first and second plate portions positioned at a predetermined interval, and evacuates the heat-insulating space closed by them, and arranges a getter that absorbs gas released into the heat-insulating space. It is a vacuum heat insulating material that is disposed on the heat insulation target side under a hydrogen atmosphere,
A vacuum heat insulating material, characterized in that a heating means is disposed on the outer surface of the second plate portion.

The vacuum heat insulating material according to claim 6, wherein the getter is disposed so as to be positioned on an inner surface side of the heating unit with respect to the second plate portion.

The first plate portion and the second plate portion are made of different metal materials or inorganic materials,
8. The vacuum heat insulating material according to claim 6, wherein the second plate portion is heated by the heating unit and has a hydrogen permeability higher than that of the first plate portion.