JPH01145556A - Non-destructive method for quality assurance of graphite seal - Google Patents
Non-destructive method for quality assurance of graphite sealInfo
- Publication number
- JPH01145556A JPH01145556A JP62303211A JP30321187A JPH01145556A JP H01145556 A JPH01145556 A JP H01145556A JP 62303211 A JP62303211 A JP 62303211A JP 30321187 A JP30321187 A JP 30321187A JP H01145556 A JPH01145556 A JP H01145556A
- Authority
- JP
- Japan
- Prior art keywords
- test
- seal
- water
- destructive
- quality assurance
- 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.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 16
- 239000010439 graphite Substances 0.000 title claims abstract description 16
- 238000000275 quality assurance Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 230000001066 destructive effect Effects 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 7
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 abstract description 4
- 208000032912 Local swelling Diseases 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 238000005470 impregnation Methods 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000002601 radiography Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009659 non-destructive testing Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002594 fluoroscopy Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は原子カプラント主冷却ポンプクールのシール機
能低下の非破壊的検出法等に適用されるグラファイト製
シールの非破壊品質保証法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a non-destructive quality assurance method for graphite seals, which is applied to non-destructive detection methods for seal function deterioration in atomic couplant main cooling pumps.
第２図に示すように、ポンプ等のグラファイト製シール
１は素材のま＼ではかなシの微細気孔２があＬ気孔率は
２〜３％にもなる。この気孔同志は連結している場合が
多く、液の漏洩によるシール機能の低下を起こすのでと
のま＼では使用できない。As shown in FIG. 2, a graphite seal 1 for a pump or the like has minute pores 2 in its raw material and has a porosity of 2 to 3%. These pores are often connected and cannot be used as is because the sealing function deteriorates due to liquid leakage.
これを防止するため一般的にグラファイト製シールはフ
ェノール樹脂等のプラスチックスを含浸させる。To prevent this, graphite seals are generally impregnated with a plastic such as phenolic resin.
しかしこのプラスチックスの含浸はシール内部の中心領
域まで行えれば理想的であるが、第３図に示すようにプ
ラスチックス含浸部分３はシール内部の中心領域まで及
ばず、中心領域にプラスチックス非含浸部分４が生じる
ことが多く、特に大塵シールではこの現象が生じゃすい
。However, it would be ideal if this plastic impregnation could be carried out to the central area inside the seal, but as shown in Figure 3, the plastic impregnated portion 3 does not reach the central area inside the seal, and the plastic is not present in the central area. Impregnated portions 4 often occur, and this phenomenon is particularly common in large dust seals.
この非含浸部分４が第３図に示すような理想的な断面形
状をしておシ、かつプラスチックス含浸部分３が健全で
あればシール１は供用可能である。If the non-impregnated portion 4 has an ideal cross-sectional shape as shown in FIG. 3 and the plastic-impregnated portion 3 is sound, the seal 1 can be used.
しかしながらシールはそのプラスチックス非含浸部分の
断面形状が第４図に示すように不整のためプラスチック
ス含浸部分が薄くなっていたシ５゜部分的に全く含浸さ
れながつたシロ（この断面形状は浸透探傷試験で容易に
把握できる）、またプラスチックス含浸部分も不完全含
浸のため気孔群７が存在したシ（これも断面の浸透探傷
試験で把握できる）することが原因となってシール機能
が低下し液（水等）の漏洩がおこる。However, as shown in Figure 4, the cross-sectional shape of the non-plastic-impregnated part of the seal was irregular, and the plastic-impregnated part was thinner. This can be easily determined by a penetrant test), and the plastic impregnated part was also incompletely impregnated, so pore group 7 was present (this can also be determined by a cross-sectional penetrant test), which caused the sealing function to deteriorate. This will cause liquid (water, etc.) to leak.
これを防止するため現在ではグラファイト製シール１の
外面８全体の浸透探傷試験や、抜き取りでシールを切断
し、その断面部分の浸透探傷試験を行って品質の保証を
行っている。しかし、このような方法で個々の製品全部
の品質保証を行うことは極めて困難であった。To prevent this, at present, quality is guaranteed by performing a penetrant test on the entire outer surface 8 of the graphite seal 1, or by cutting the seal and performing a penetrant test on its cross section. However, it has been extremely difficult to guarantee the quality of all individual products using this method.
現在のグラファイト製シールの品質保証は。 What is the quality guarantee of current graphite seals?
シール外面全面および抜き取シ品の切断による断面の浸
透探傷だけであるので前記のような問題点があった。Since penetrant flaw detection is performed only on the entire outer surface of the seal and on the cross section by cutting the extracted product, there are the problems described above.
本発明の課題は、切断等によらず非破壊的に内部の健全
性をチエツクする方法を提供することである。An object of the present invention is to provide a method for non-destructively checking the internal health of a device without cutting or the like.
本発明によるグラファイト製シールの非破壊品質保証法
は、シールの樹脂非含浸部および含浸不完全部分を完全
脱水（液）および完全飽水＠）を行い、それぞれの段階
で非破壊試験、例えば浸透探傷試験と中性子ラジオグラ
フィ試験との組会せを行い脱水（液）および飽水（液）
での非破壊試験結果の差即ち欠陥指示の明瞭±の程度（
浸透探傷試験などの外面検査手法）や像のコントラスト
の強弱（中性子ラジオグラフィなどの内部検査手法）か
らシール機能の健全性を判定することを特徴とする。The non-destructive quality assurance method for graphite seals according to the present invention involves completely dehydrating (liquid) and completely saturated water the non-resin-impregnated parts and incompletely impregnated parts of the seal, and conducting a non-destructive test at each stage, such as permeation. Dehydration (liquid) and saturation (liquid) are performed by combining flaw detection and neutron radiography tests.
The difference in non-destructive test results, i.e. the degree of clarity of defect indications (
It is characterized by determining the soundness of the seal function from the strength of image contrast (external inspection methods such as penetrant testing) and the strength and weakness of image contrast (internal inspection methods such as neutron radiography).
本発明によれば、グラファイト製シールの完全脱水時お
よび加圧飽水時にそれぞれ外面の浸透探傷試験、および
内部に対する軟Ｘ縁撮影（又は透視）試験又は中性子ラ
ジオグラフィ（又は中性子線透視）試験、超音波探傷試
験を行ない、その非破壊試験結果の差からシール機能の
健全性を判定することができる。According to the present invention, a penetrant test is performed on the outer surface of the graphite seal when it is completely dehydrated and when the seal is saturated with water under pressure, and a soft X-edge photography (or fluoroscopy) test or a neutron radiography (or neutron beam fluoroscopy) test is performed on the inside. An ultrasonic flaw detection test is performed, and the soundness of the seal function can be determined from the difference in the non-destructive test results.
本発明の品質保証手段の手順は下記の通υである。 The procedure of the quality assurance means of the present invention is as follows.
■ グラファイト製シールの真空中における加熱脱水又
はアセトン中超音波洗浄後温風乾燥。■ Heat dehydration of graphite seals in vacuum or hot air drying after ultrasonic cleaning in acetone.
■ シールの外面および内部に対する非破壊試験。■Non-destructive testing of the outside and inside of the seal.
■ 水中におけるシールの加圧飽水。■ Pressure saturation of the seal in water.
■ シールの外面および内部に対する非破壊試験。■Non-destructive testing of the outside and inside of the seal.
■ ■と■の試験結果の比較によるシールの品質保証。■ Seal quality assurance by comparing the test results of ■ and ■.
以上の手順による非破壊試験結果の要約は第５図に示さ
れている。第５図の特徴をよく把握し。A summary of the non-destructive test results obtained by the above procedure is shown in FIG. Understand the characteristics of Figure 5 well.
第１図のフローチャート（浸透探傷と中性子ラジオグラ
フィとの組合せ）に従ってインデイケージ璽ンを解明し
ていくと、非含浸部の寸法や不完全樹脂含浸部の検出が
出来るようになるので、（例えば外面浸透−探傷法、内
部中性子ラジオグラフィ）非破壊的にシールの品質保証
ができる。If you follow the flowchart in Figure 1 (combining penetrant testing and neutron radiography) to clarify the index cage, you will be able to detect the dimensions of non-impregnated areas and incomplete resin impregnation (for example, (external surface penetration flaw detection method, internal neutron radiography) allows for non-destructive seal quality assurance.
なお真空中の加熱脱水は時間がかかる場合もあるため、
シール全体をアセトン等に全浸漬し超音波洗浄を行い、
洗浄後温風によってアセトンを蒸発させると脱水時間の
短縮がはかれる。Please note that heating dehydration in a vacuum may take some time, so
The entire seal is completely immersed in acetone etc. and then ultrasonically cleaned.
After washing, evaporating the acetone with hot air will shorten the dehydration time.
本発明によって原子カプラント１次冷却材ポンプ等のグ
ラファイトシールの水等による局部膨しゅんによるシー
ルの変形および変形に伴う許容値以上の水等の漏れを防
止できるのでポンプ等の十分な品質保証ができる。According to the present invention, it is possible to prevent the deformation of the graphite seal of an atomic couplant primary coolant pump, etc. due to local swelling due to water, etc., and the leakage of water, etc. that exceeds the allowable value due to the deformation, thereby ensuring sufficient quality of the pump, etc. .
第１図は本発明の一実施例のシールの非破壊検査による
合否判定のフローチャート図、第２図は樹脂含浸前のシ
ールを示す図、第３図は許容できる樹脂の含浸状態を示
す図、第４図は許容できない樹脂の含浸状態を示す図、
第５図はシールの脱水時と飽水時の非破壊検査のインデ
イケージコンを示す図である。
１・・・グラファイト製シール、２・・・樹脂含浸前の
気孔、３・・・樹脂完全含浸部、４・・・樹脂非含浸部
。
７・・・不完全樹脂含浸部。
出願人代理人 弁理士 鈴 江 武 彦閾
（Ａ）
（Ｂ）Ａ−Ａ断面
第２図
第３図
（Ａ） （Ｂ）
第４図FIG. 1 is a flowchart of pass/fail determination by nondestructive testing of a seal according to an embodiment of the present invention, FIG. 2 is a diagram showing the seal before resin impregnation, and FIG. 3 is a diagram showing an acceptable state of resin impregnation. FIG. 4 is a diagram showing an unacceptable state of resin impregnation;
FIG. 5 is a diagram showing an indicative test for non-destructive testing of the seal when it is dehydrated and when it is saturated with water. 1... Graphite seal, 2... Pores before resin impregnation, 3... Resin completely impregnated area, 4... Resin non-impregnated area. 7... Incomplete resin impregnation part. Applicant's agent Patent attorney Takehiko Suzue Threshold (A) (B) A-A cross section Figure 2 Figure 3 (A) (B) Figure 4
Claims (1)
部を完全脱水（液）および完全飽水（液）を行い、それ
ぞれの段階で非破壊試験を行い、脱水（液）および飽水
（液）での非破壊試験結果の差からシール機能の健全性
を判定することを特徴とするグラファイト製シールの非
破壊品質保証法。Completely dehydrated (liquid) and completely saturated with water (liquid) the non-resin-impregnated and incompletely impregnated parts of graphite seals, conducted non-destructive tests at each stage, and evaluated the dehydration (liquid) and saturated (liquid) A non-destructive quality assurance method for graphite seals that is characterized by determining the soundness of the seal function from the difference in non-destructive test results.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62303211A JPH01145556A (en) | 1987-12-02 | 1987-12-02 | Non-destructive method for quality assurance of graphite seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62303211A JPH01145556A (en) | 1987-12-02 | 1987-12-02 | Non-destructive method for quality assurance of graphite seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01145556A true JPH01145556A (en) | 1989-06-07 |
Family
ID=17918215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62303211A Pending JPH01145556A (en) | 1987-12-02 | 1987-12-02 | Non-destructive method for quality assurance of graphite seal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01145556A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020082396A1 (en) * | 2018-10-27 | 2020-04-30 | 合刃科技（深圳）有限公司 | Test method and test device |
-
1987
- 1987-12-02 JP JP62303211A patent/JPH01145556A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020082396A1 (en) * | 2018-10-27 | 2020-04-30 | 合刃科技（深圳）有限公司 | Test method and test device |
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