JP3995647B2 - Method of judging deterioration degree of heat insulating material and heat insulating material - Google Patents
Method of judging deterioration degree of heat insulating material and heat insulating material Download PDFInfo
- Publication number
- JP3995647B2 JP3995647B2 JP2003346912A JP2003346912A JP3995647B2 JP 3995647 B2 JP3995647 B2 JP 3995647B2 JP 2003346912 A JP2003346912 A JP 2003346912A JP 2003346912 A JP2003346912 A JP 2003346912A JP 3995647 B2 JP3995647 B2 JP 3995647B2
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- insulating material
- deterioration
- color
- degree
- 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
Images
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Description
本発明は、断熱材の劣化度診断方法及び劣化度の診断を容易に行うことができる断熱材に関する。 The present invention relates to a method for diagnosing the degree of deterioration of a heat insulating material and a heat insulating material capable of easily diagnosing the degree of deterioration.
断熱材は、文字通り、熱の伝導を遮断するために使用されるものであるため、その特性は、一次的には熱伝導率により評価することができる。
この種の断熱材を、例えば、冷熱配管の断熱用に使用する場合、施工直後は良好な断熱性能を発揮できる断熱材であっても、長期間の使用により雨水等が内部に侵入し、断熱材が含水して断熱性が低下する。この状況にあっては、断熱材の強度低下も起こり、安全性の面でも問題である。
Since the heat insulating material is literally used to block heat conduction, its characteristics can be evaluated primarily by heat conductivity.
For example, when using this type of heat insulating material for heat insulation of cold heat pipes, even if it is a heat insulating material that can exhibit good heat insulating performance immediately after construction, rainwater and the like enter the interior due to long-term use, and heat insulation The material contains water and heat insulation is reduced. In this situation, the strength of the heat insulating material also decreases, which is also a problem in terms of safety.
断熱材の劣化は、その水分量によるところが大であるが、直接的に材料の熱伝導率を測定することで、その劣化度合いを判断することができる。
熱伝導率の測定に際しては、従来、熱伝導率測定用の専用装置を使用して測定を行う。この装置は、単独独立構成のものであり、現場に設置されている断熱材を設置状態のまま測定を行なうことはできず、測定に際しては、所定形状の測定サンプルを切り出し、装置に載置して測定を行う。
The deterioration of the heat insulating material depends largely on the amount of water, but the degree of deterioration can be determined by directly measuring the thermal conductivity of the material.
In measuring the thermal conductivity, conventionally, measurement is performed using a dedicated device for measuring thermal conductivity. This device has a single independent configuration, and it is not possible to measure the insulation material installed at the site in the installed state. For measurement, a measurement sample of a predetermined shape is cut out and placed on the device. To measure.
従って、上述のような、配管周りに装着されている既設断熱材の劣化判断を行うためには、その一部を所定形状に切り出し、測定をすることが必要となる。
このような劣化判断手法では既設断熱材の切り出しが必要となり、さらに切り出し部の応急的な補修等が必要であり手間が掛かる。また、熱伝導率測定装置は比較的高価である。（先行技術を特に挙げることができない。）
Therefore, in order to determine the deterioration of the existing heat insulating material attached around the pipe as described above, it is necessary to cut a part of the heat insulating material into a predetermined shape and perform measurement.
In such a deterioration judgment method, it is necessary to cut out the existing heat insulating material, and further, it is necessary to urgently repair the cut out portion, which takes time. Also, the thermal conductivity measuring device is relatively expensive. (There is no particular mention of prior art.)
そこで、間接的に断熱性を判断する方法として、断熱材中の含水率を測定することにより、その含水率から熱伝導率を推定することが行われている。通常、含水率は断熱材を乾燥させ絶縁状態にすることにより、その重量変化から求められる。この場合も、既設の断熱材を切り出す、又は取り外す必要がある。（先行技術を特に挙げることができない。） Therefore, as a method for indirectly determining the heat insulation property, it is performed to estimate the thermal conductivity from the water content by measuring the water content in the heat insulating material. Usually, the moisture content is obtained from the weight change by drying the heat insulating material to make it in an insulating state. Also in this case, it is necessary to cut out or remove the existing heat insulating material. (There is no particular mention of prior art.)
上述の熱伝導率による方法、あるいは含水率による方法を採る場合、共に、既設の断熱材を切り出しあるいは取り外し、別途所定の物性を測定する必要があり、それら切り出し、取り外しに際しては、断熱材を使用している配管等の機器の運転を停止させる、あるいは、取り外した部分の応急処理を行う必要がある。 When adopting the above-mentioned method based on thermal conductivity or the method based on moisture content, it is necessary to cut out or remove existing thermal insulation materials and measure specific physical properties separately. It is necessary to stop the operation of equipment such as piping or to perform emergency treatment of the removed part.
本発明は、上記の課題に鑑みてなされたものであり、その目的は、断熱材の劣化判断をするに際して、これを簡単に行うことが可能であり、既設の断熱材を切り出す等の作業をすることなく容易に行うことができる判断方法、あるいは、その種の判断が可能な断熱材を得ることにある。 The present invention has been made in view of the above-mentioned problems, and its purpose is to easily perform this in determining deterioration of a heat insulating material, such as cutting out an existing heat insulating material. The object is to obtain a heat insulating material that can be determined easily or without such a determination.
上記目的を達成するための本発明に係る断熱材の劣化度判断方法の第１特徴構成は、水分量に従って変色する物質を有機溶剤に溶かした判断用試液を、劣化判断対象の断熱材に塗布し、塗布された前記物質の呈する色から、前記断熱材の含水度を検出し、その検出結果から、前記断熱材の劣化度を判断する点にある。 In order to achieve the above object, the first characteristic configuration of the method of determining the degree of deterioration of a heat insulating material according to the present invention is to apply a determination test solution in which a substance that changes color according to the amount of moisture is dissolved in an organic solvent to the heat insulating material to be deteriorated. The water content of the heat insulating material is detected from the color of the applied substance, and the degree of deterioration of the heat insulating material is determined from the detection result.
本願の断熱材の劣化度の判断に際しては、判断用試液を断熱材に塗布する。塗布方法としては、試液を噴霧塗布するあるいはハケ等により直接塗布する等の方法を採用できる。さて、この判断用試液には、周囲に存する水分量に従って変色する物質が含まれているため、塗布状態で、断熱材に含まれている水分量に依存して前記物質の呈する色が変化する。
よって、この色を識別することで、断熱材の含水度を知ることができ、前記断熱材の劣化度合いを判断することができる。
In determining the degree of deterioration of the heat insulating material of the present application, a determination test solution is applied to the heat insulating material. As an application method, a method such as spray application of a test solution or direct application by brush or the like can be employed. Now, since this determination reagent contains a substance that changes color according to the amount of moisture present in the surroundings, the color exhibited by the substance changes depending on the amount of moisture contained in the heat insulating material in the applied state. .
Therefore, by identifying this color, the moisture content of the heat insulating material can be known, and the degree of deterioration of the heat insulating material can be determined.
本発明の第２特徴構成は、上記第１特徴構成に加えて、前記有機溶剤がエタノール又はアセトンである点にある。
溶剤として、エタノール又はアセトンを採用することで、水との馴染みよく、比較的速い乾燥状態を実現して判断を行える。
According to a second characteristic configuration of the present invention, in addition to the first characteristic configuration, the organic solvent is ethanol or acetone.
By adopting ethanol or acetone as a solvent, it is possible to make a judgment by realizing a relatively fast dry state with familiarity with water.
本願の実施の形態は、断熱材の表面に、本願独特の判断用試液を塗布することで、断熱材の劣化度を判断するものである。 Embodiment of this application judges the deterioration degree of a heat insulating material by apply | coating the test liquid unique to this application to the surface of a heat insulating material.
本願で対象とする断熱材は、主には、ケイ酸カルシウム、石膏、ロックウール、ポリウレタンフォーム等があるが、その他、任意の断熱材を対象とできる。また、これら断熱材表面および内部に撥水処理が施されていても、本願は対象とできる。 The heat insulating material targeted in this application is mainly calcium silicate, gypsum, rock wool, polyurethane foam, etc., but any other heat insulating material can be targeted. Moreover, even if the surface and the inside of these heat insulating materials are subjected to water repellent treatment, the present application can be targeted.
本願の実施の形態の実施状況を図１に示した。以下、図面を参照しながら説明する。 The implementation status of the embodiment of the present application is shown in FIG. Hereinafter, description will be given with reference to the drawings.
１．実施形態
図１（イ）に示すように、防水用の外装材５を剥がした後、本願独特の判断用試液１を、劣化判断対象の断熱材２に吹き付け塗布し、塗布状態で、判断用試液１に含有される物質３の呈する色から、その断熱材２に含まれる含水度を求め、その検出結果からこの断熱材の劣化度を判断する。
劣化度の判断は、判断プログラムを備えたマイコン等を備えておき、断熱材２の色を自動検出して、検出される色に基づいて、予め用意されている指標に基づいて劣化度を求めるものとしても良いし、作業者が、色を見て劣化度を判断するようにしてもよい。
1. Embodiment As shown in FIG. 1 (a), after peeling off the waterproof
The determination of the degree of deterioration includes a microcomputer or the like equipped with a determination program, automatically detects the color of the heat insulating material 2, and obtains the degree of deterioration based on an index prepared in advance based on the detected color. It may be used, or the operator may determine the degree of deterioration by looking at the color.
ここで、判断用試液１は、塩化コバルト等の、断熱材２に含まれる水分量に応じて、その呈する色が変化する物質３を有機溶剤に溶かし込んだものである。この種の有機溶剤としては、エタノール又はアセトンが例示される。
Here, the
さて、この手法では、同図（イ）に示すように、判断用試液を断熱材表面２ａに吹き付け塗布する。この様にすると、断熱材２の水分量に応じて呈する色が変化する。塩化コバルトの場合、概略、水分量が１０体積％未満の場合、青色を呈するのであり、水分量が１０体積％を越えると、赤色となる。
従って、例えば、図１（ロ）に示すように塗布後に赤色を呈した場合、水分量が高く、劣化が進んでいると判断でき、交換、補修が必要であると判断できる。
In this method, as shown in FIG. 5A, the determination test solution is sprayed and applied to the heat insulating
Therefore, for example, when red is applied after application as shown in FIG. 1 (b), it can be determined that the amount of water is high and deterioration is progressing, and that replacement and repair are necessary.
１．実施例
上述の実施形態の先に示した手法に従って実施する実施例に関して、以下、検出・判断形態を中心に説明する。しかし、本発明は当該実施例によって何ら限定されるものではない。
イ 判断用試液１の作製に際して、塩化コバルトをエタノールに溶解させ、５％の塩化コバルトのエタノール溶液を作製した。この溶液は青色である。
劣化判断において、この判断用試液１を、含水率（具体的には、５体積％、１０体積％、１５体積％）の異なる、判断対象である断熱材２としてのケイ酸カルシウム保温材に吹き付け、呈する色の変化を調べた。
含水率が５体積％、１０体積％のケイ酸カルシウム保温材にあっては、３０秒経過後においても大部分が青色であり、変色が発生しなかった。これに対して、含水率が１５体積％のケイ酸カルシウム保温材にあっては、３０秒経過後では大部分が赤色に変色した。
1. Examples Regarding the examples implemented in accordance with the method described above in the above embodiment, the detection / judgment mode will be mainly described below. However, the present invention is not limited to the examples.
(A) Cobalt chloride was dissolved in ethanol when preparing the
In the deterioration determination, this
In the calcium silicate heat insulating material having a water content of 5% by volume and 10% by volume, most of it was blue even after 30 seconds, and no discoloration occurred. On the other hand, in the calcium silicate heat insulating material having a water content of 15% by volume, most of the color changed to red after 30 seconds.
このことにより、ケイ酸カルシウム保温材に５％の塩化コバルトのエタノール溶液を吹き付け、３０秒経過後の色を調べることにより、含水率が１０体積％以下、あるいは１５体積％以上の判断をすることが可能である。
通常、ケイ酸カルシウム保温材では、含水率が１０体積％を越えると材料の劣化が進み、交換が必要と考えられるため、この種の判断に本願手法が好適に適用できることが判る。
By this, 5% cobalt chloride ethanol solution is sprayed on the calcium silicate heat insulating material, and the water content is determined to be 10 volume% or less, or 15 volume% or more by examining the color after 30 seconds. Is possible.
Usually, in the calcium silicate heat insulating material, when the water content exceeds 10% by volume, it is considered that the material deteriorates and needs to be replaced. Therefore, it can be understood that the method of the present invention can be suitably applied to this kind of determination.
ロ さらに、塩化コバルトのエタノール溶液の濃度を変化させ（具体的には、５重量％、１０重量％）、ケイ酸カルシウム保温材に吹き付け色の変化を調べた。
塩化コバルトの濃度が低い（５重量％）と高含水率（１５体積％）で３０秒経過後に大部分が赤色に変化し、また、塩化コバルトの濃度が高い（１０重量％）と、さらに高い高含水率（２５体積％）で、初めて３０秒経過後、大部分が赤色に変わった。
このことから、吹き付ける塩化コバルトの濃度を変化させることにより、色変化から断熱材の含水率を推定することができることが判明した。
(B) Further, the concentration of the ethanol solution of cobalt chloride was changed (specifically, 5% by weight and 10% by weight), and the change in the color sprayed on the calcium silicate heat insulating material was examined.
When the concentration of cobalt chloride is low (5% by weight) and the water content is high (15% by volume), most changes to red after 30 seconds, and when the concentration of cobalt chloride is high (10% by weight), it is even higher. At a high water content (25% by volume), after 30 seconds for the first time, most of the color turned red.
From this, it was found that the moisture content of the heat insulating material can be estimated from the color change by changing the concentration of cobalt chloride to be sprayed.
以上説明したように、水分量が少ない時と多い時とで色が変化する物質を使用することにより、対象物の含水率を調査することができ、本発明によれば、対象物を取り外すことなく、また高価な測定装置を使用することなく、含水率を測定することができる。
結果、運転中の機器に取り付けられている断熱材を取り外すことなく、断熱材の劣化具合を調査することが可能である。
As described above, the moisture content of an object can be investigated by using a substance whose color changes between when the amount of water is small and when it is large, and according to the present invention, the object is removed. The moisture content can be measured without using an expensive measuring device.
As a result, it is possible to investigate the deterioration of the heat insulating material without removing the heat insulating material attached to the operating device.
上記の実施の形態にあっては、変色物質として、塩化コバルトの例を示したが、塩化ニッケル、塩化銅、硝酸ニッケルも使用可能である。 In the above embodiment, the example of cobalt chloride is shown as the discoloring substance, but nickel chloride, copper chloride, and nickel nitrate can also be used.
一方、有機溶剤としては、メタノール、エタノール、アセトン等、本願で使用する変色物質を溶解できるものであればよい。 On the other hand, any organic solvent may be used as long as it can dissolve the color-changing substance used in the present application, such as methanol, ethanol, and acetone.
さらに、断熱材の劣化の判断に関して、ケイ酸カルシウム、シリカ等は含水率１０体積％でその劣化が進行していると判断できるが、ポリウレタンフォームに関しては、ケイ酸カルシウムと同程度の含水率で、劣化が進行していると判断できる。 Furthermore, regarding the determination of the deterioration of the heat insulating material, it can be determined that the deterioration of calcium silicate, silica, etc. is progressing at a moisture content of 10% by volume, but the polyurethane foam has a moisture content similar to that of calcium silicate. It can be determined that the deterioration is progressing.
１： 判断用試液
２： 断熱材
２ａ： 断熱材表面
２ｂ： 断熱材内部
３： 物質
１０： 断熱材
1: Test solution for judgment 2:
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003346912A JP3995647B2 (en) | 2003-10-06 | 2003-10-06 | Method of judging deterioration degree of heat insulating material and heat insulating material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003346912A JP3995647B2 (en) | 2003-10-06 | 2003-10-06 | Method of judging deterioration degree of heat insulating material and heat insulating material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005114466A JP2005114466A (en) | 2005-04-28 |
| JP3995647B2 true JP3995647B2 (en) | 2007-10-24 |
Family
ID=34539681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003346912A Expired - Fee Related JP3995647B2 (en) | 2003-10-06 | 2003-10-06 | Method of judging deterioration degree of heat insulating material and heat insulating material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3995647B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008122170A (en) * | 2006-11-10 | 2008-05-29 | Asahi Kasei Homes Kk | Weather resistance deterioration diagnosis method for exterior members |
| JP6630044B2 (en) * | 2014-07-29 | 2020-01-15 | 積水化学工業株式会社 | Degradation diagnosis method for resin piping system |
-
2003
- 2003-10-06 JP JP2003346912A patent/JP3995647B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005114466A (en) | 2005-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3995647B2 (en) | Method of judging deterioration degree of heat insulating material and heat insulating material | |
| CA2712855C (en) | Non-contact freezing temperature determination | |
| WO2012031181A2 (en) | Method and device for sensing corrosion under insulation (cui) | |
| González et al. | Some questions on the corrosion of steel in concrete. Part II: Corrosion mechanism and monitoring, service life prediction and protection methods | |
| WO2017033242A1 (en) | Degradation detection structure, degradation detection method, and degradation detection system | |
| CN108037370A (en) | Bushing makes moist the appraisal procedure of state under a kind of actual condition | |
| Andrade et al. | Calibration by gravimetric losses of electrochemical corrosion rate measurement using modulated confinement of the current | |
| EA200700372A1 (en) | METHOD FOR MONITORING THE CARRYING CAPACITY OF REINFORCED CONCRETE COATING OR OVERLAPPING | |
| Davis et al. | EIS-based in-situ sensor for the early detection of coatings degradation and substrate corrosion | |
| DK200200441A (en) | U value measure | |
| JP5399338B2 (en) | Porous material density evaluation method and porous material density evaluation system | |
| CN102607473B (en) | Crack sounding and monitoring penetration detection method and simulation test block | |
| KR20190026083A (en) | Fire temperature detection indicator and structure damage degree and range assessment method with its use | |
| Lau et al. | Coating condition evaluation of epoxy coated rebar | |
| JP5081685B2 (en) | Degradation state diagnosis method of insulating oil in oil-filled equipment | |
| WO2000014523A3 (en) | Apparatus for monitoring the operability of an electrochemical sensor | |
| Kitagawa et al. | Assessment of cable maintenance technologies for Honshu-Shikoku Bridges | |
| FI108891B (en) | Method and apparatus for measuring the moisture in structures | |
| Hooton | Development of standard test methods for measuring fluid penetration and ion transport rates | |
| Fisher et al. | Severn Bridge Cables Corrosion Models, Use of Inhibitors and their Impact on the Cable Assessment | |
| CN106019091A (en) | Power system transformer performance evaluation system | |
| JP5147532B2 (en) | Inundation detection system and inundation detection method using this system | |
| KR20090108360A (en) | Insulation Cover for Piping | |
| JPH08261851A (en) | Testing device of ventilation performance of vent pipe installed in waterproofing construction | |
| RU2463576C1 (en) | Bimetallic contact corrosion sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050909 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050929 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20051124 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060629 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060824 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070705 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20070731 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100810 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 3995647 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100810 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100810 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110810 Year of fee payment: 4 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120810 Year of fee payment: 5 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130810 Year of fee payment: 6 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |