JPS6256970B2 - - Google Patents
Info
- Publication number
- JPS6256970B2 JPS6256970B2 JP55173571A JP17357180A JPS6256970B2 JP S6256970 B2 JPS6256970 B2 JP S6256970B2 JP 55173571 A JP55173571 A JP 55173571A JP 17357180 A JP17357180 A JP 17357180A JP S6256970 B2 JPS6256970 B2 JP S6256970B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- inspected
- main body
- opening
- leak
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Description
【発明の詳細な説明】
本発明はリークテスター（漏れ試験器）に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a leak tester.
例えば繊維強化プラスチツク（FRP）製パイ
プの接合部等においては、その表面がでこぼこで
あるのと同時に、繊維と樹脂間に微小な空洞が生
じているので、従来の検査方法、例えばカラーチ
エツクあるいは超音波試験等により、漏れ試験の
代替をすることは困難である。そこで、一般的な
漏れ試験方法としてパイプ内にガス圧を加え、そ
の漏れをガステイテクターにより検知する方法が
ある。しかしこのものによると、パイプが例えば
大口径になると、その封入ガスの容量も増加する
と、また密閉のための大型治具が必要となり、検
査に要する費用が高くなるという欠点がある。 For example, the joints of fiber-reinforced plastic (FRP) pipes have uneven surfaces and minute cavities between the fibers and resin, so conventional inspection methods such as color check or super It is difficult to replace the leakage test with a sonic test or the like. Therefore, as a general leak test method, there is a method of applying gas pressure inside the pipe and detecting the leak with a gas detector. However, according to this method, when the diameter of the pipe increases, for example, the capacity of the sealed gas also increases, and a large-sized jig is required for sealing, which increases the cost required for inspection.
このような問題点を解決するものとして、例え
ば実開昭54−25884号公報や実開昭52−91187号公
報に見られるように、被検査物体の溶接部分表面
に予め石鹸水を塗つておき、そしてシーリング部
材（パツキング）を介して筐体（バキユーム枠
体）を載置したのち、この筐体の内部空間を減圧
し、これにより石鹸水に気泡が発生するか否かを
ガラス窓（透視板）から観察する装置が提供され
ている。 As a solution to this problem, as shown in, for example, Japanese Utility Model Application Publication No. 54-25884 and Japanese Utility Model Application No. 52-91187, soap water is applied in advance to the surface of the welded part of the object to be inspected. Then, after placing the casing (vacuum frame) through a sealing member (packing), the internal space of this casing is depressurized, and a glass window (see-through) is used to check whether air bubbles are generated in the soapy water. A device for observation from a plate) is provided.
しかし、これらの従来形式によると、予め石鹸
水を塗ることから作業性の悪いものとなり、また
石鹸水の塗り具合（面積や位置）によつて、この
石鹸水上にシーリング部材が位置してシール性に
支障をきたすことになる。 However, with these conventional methods, workability is poor because soapy water is applied in advance, and depending on the degree of application (area and position) of the soapy water, the sealing member may be positioned on top of the soapy water, resulting in poor sealing performance. This will cause problems.
本発明の目的はとするところは、作業性ならび
にシール性に好適なリークテスターを提供する点
にある。 An object of the present invention is to provide a leak tester suitable for workability and sealing performance.
上記目的を達成するために本発明のリークテス
ターは、本体の一端に観察窓を設け、上記本体の
他端に開口を設け、上記本体の他端開口端部全周
に被検査面に吸着可能な吸着ラバーを設け、上記
本体に、真空ポンプに接続可能な第１開閉弁と、
大気に連通可能な第２開閉弁とを設け、上記本体
内に、ノズル部先端が上記開口に向き且つ弁棒が
上記第１開閉弁の弁本体に対向する検査液噴射弁
と、被検査面を照射する照射体とを設けている。 In order to achieve the above object, the leak tester of the present invention is provided with an observation window at one end of the main body, an opening at the other end of the main body, and the entire circumference of the other open end of the main body can be attracted to the surface to be inspected. a first on-off valve connectable to a vacuum pump;
a second on-off valve that can communicate with the atmosphere; a test liquid injection valve having a nozzle tip facing the opening and a valve stem facing the valve body of the first on-off valve; and a surface to be inspected; An irradiator for irradiating the light is provided.
かかる本発明構成によると、先ず吸着ラバーを
被検査面上に吸着させる。次に、第１開閉弁を開
くと共に真空ポンプにより本体内の空気を抜き所
定の真空度に保ち、吸着ラバーよりの空気漏れを
少なくする。そして第１開閉弁の弁本体を下方に
押下げて噴射弁を開き、検査液を吸着ラバーで囲
まれた被検査面上に噴霧させる。そして、照射体
により被検査面を照射すれば、観察窓から観察す
ることができる。もし、被検査面に漏れがあれ
ば、その部分の検査液膜がふくらむので容易に漏
れ部を発見できる。 According to this configuration of the present invention, first, the suction rubber is suctioned onto the surface to be inspected. Next, the first opening/closing valve is opened and air is removed from the main body using a vacuum pump to maintain a predetermined degree of vacuum to reduce air leakage from the suction rubber. Then, the valve body of the first on-off valve is pushed down to open the injection valve, and the test liquid is sprayed onto the surface to be tested surrounded by the suction rubber. If the surface to be inspected is irradiated with the irradiator, it can be observed through the observation window. If there is a leak on the surface to be inspected, the test liquid film in that area will swell, making it easy to find the leak.
以下、本発明の一実施例を第１図〜第３図に基
づき説明する。 An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
１は本発明に係るリークテスター、２はその本
体で、筒状部２ａと、該筒状部２ａの側部から突
設された突出部２ｂとから構成されている。上記
筒状部２ａの上端には、観察窓の一例である凸レ
ンズ３が取付具４により取付けられている。５は
凸レンズ３の支持部兼パツキンである。また、筒
状部２ａの他端には開口６が設けられ、そして該
開口６端部全周には被検査面に吸着可能な吸着面
７ａを有する吸着ラバー７が設けられている。即
ち、上記吸着ラバー７の断面形状は逆Ｕ字状にさ
れると共に、その内周突出部７ｂよりも外周突出
部７ｃの方が長くされている。そして、リークテ
スター１のグリツプ部でもある上記突出部２ｂの
内部には、空間部８が形成されている。９は突出
部２ｂの壁体に形成された連通孔で、その一端
は、第１の開閉弁１０により空間部８と連通自在
にされた弁室１１に開口され、またその他端は突
出部２ｂ端面に開口すると共にフレキシブルパイ
プ１２を介して真空ポンプ１３に接続されてい
る。なお、１４は突出部２ｂ壁体の連通孔９の途
中に介装された圧力調整弁である。１５は突出部
２ｂの壁体に設けられた第２の開閉弁で、空間部
８側と大気側とを連通自在にするものである。ま
た、空間部８に接する突出部２ｂの壁体には、照
射体例えば電球１６が取付けられて、被検査面を
照らすようにしている。勿論、図示していない
が、電球１６には電源からの電線が接続されてい
る。１７は上記空間部８の下部に設けられた検査
液の噴射弁で、またその弁棒１８の頂部１８ａは
所定間隔ｌ離されて前記第１の開閉弁１０の弁本
体１９の真下に来るようにされている。そして、
噴射弁１７のノズル部１７ａ先端は上記開口６に
対向するようにされ、またその弁室２０は本体２
の筒状部２ａ外周の適当箇所に取付けられた検査
液例えば石鹸液用ボンベ２１にフレキシブルパイ
プ２２を介して接続されている。 1 is a leak tester according to the present invention, and 2 is a main body thereof, which is composed of a cylindrical portion 2a and a protruding portion 2b protruding from the side of the cylindrical portion 2a. A convex lens 3, which is an example of an observation window, is attached to the upper end of the cylindrical portion 2a by a fixture 4. Reference numeral 5 denotes a support portion and packing for the convex lens 3. Further, an opening 6 is provided at the other end of the cylindrical portion 2a, and a suction rubber 7 having a suction surface 7a that can be suctioned to a surface to be inspected is provided around the entire circumference of the end of the opening 6. That is, the suction rubber 7 has an inverted U-shaped cross section, and the outer circumferential protrusion 7c is longer than the inner circumferential protrusion 7b. A space 8 is formed inside the protruding portion 2b, which is also a grip portion of the leak tester 1. Reference numeral 9 denotes a communication hole formed in the wall of the protrusion 2b, one end of which opens into the valve chamber 11 which is in communication with the space 8 by the first on-off valve 10, and the other end of the communication hole 9 that is connected to the protrusion 2b. It opens at the end face and is connected to a vacuum pump 13 via a flexible pipe 12. In addition, 14 is a pressure regulating valve interposed in the middle of the communication hole 9 of the wall of the protrusion 2b. Reference numeral 15 denotes a second on-off valve provided on the wall of the protrusion 2b, which allows free communication between the space 8 side and the atmosphere side. Further, an irradiator such as a light bulb 16 is attached to the wall of the protruding portion 2b in contact with the space 8 to illuminate the surface to be inspected. Of course, although not shown, an electric wire from a power source is connected to the light bulb 16. Reference numeral 17 denotes a test liquid injection valve provided at the lower part of the space 8, and the top 18a of the valve stem 18 is located directly below the valve body 19 of the first on-off valve 10 with a predetermined distance 1 apart. It is being done. and,
The tip of the nozzle portion 17a of the injection valve 17 is arranged to face the opening 6, and the valve chamber 20 is located in the main body 2.
It is connected via a flexible pipe 22 to a cylinder 21 for test liquid, such as soap liquid, which is attached to an appropriate location on the outer periphery of the cylindrical portion 2a.
上記のような構成によると、第３図に示すよう
に、例えばFRP製板体２３の接合部の漏れを検
査する場合、先ずリークテスター１の突出部２ｂ
を持つて、吸着ラバー７部の吸着面７ａにシール
助剤（例えばグリス、オイルなど）をあらかじめ
塗布し、そして吸着面７ａを被検査面Ａ上に吸着
させてシール効果を増大させる。次に、第１の開
閉弁１０を開くと共に真空ポンプ１３によりリー
クテスター１の本体２内の空気を抜き圧力調整弁
１４の動きで過剰真空とならないような所定の真
空度に保ち、吸着ラバー７よりの空気漏れを少な
くする。なお、表面張力の弱い石鹸等を用いる場
合は、シール部からの漏れによる気泡は検査の障
害とならない程微小であるからこの限りではな
い。更に、第１の開閉弁１０の弁棒２４を所定間
隔ｌ以上に下方に押下げて噴射弁１７を開き、石
鹸液を吸着ラバー７で囲まれた被検査面Ａ上に噴
霧させる。そして、電球１６により被検査面Ａに
光を照射すれば、筒状部２ａの上部に設けられた
凸レンズ３により漏れ部を拡大観察することがで
きる。もし、被検査面Ａに漏れがあれば、その部
分の石鹸膜がふくらむので容易に漏れ部を発見で
きる。なお、第１図二点鎖線で示すように、空間
部８の筒状部２ａとの連通箇所に偏光レンズ２５
を設けるようにしてもよい。更に、第１図一点鎖
線で示すように、筒状部２ａ内に凸レンズ３への
反射光を防ぐための末広がり状の壁体２６を設
け、被検査面Ａを見やすくするようにしてもよ
い。そして、リークテスター１を被検査面Ａから
離脱させる場合、第２の開閉弁１５を開き、本体
２内を大気圧にした後、吸着ラバー７を被検査面
Ａから取外せばよい。 According to the above configuration, as shown in FIG.
Then, a sealing aid (eg, grease, oil, etc.) is applied in advance to the suction surface 7a of the suction rubber 7, and the suction surface 7a is adsorbed onto the surface A to be inspected to increase the sealing effect. Next, the first opening/closing valve 10 is opened, and the air inside the main body 2 of the leak tester 1 is removed by the vacuum pump 13, and the vacuum is maintained at a predetermined degree so as not to create an excessive vacuum by the movement of the pressure regulating valve 14. Reduce air leakage. Note that this is not the case when using a soap or the like having a low surface tension, since bubbles caused by leakage from the sealing portion are so minute that they do not interfere with the inspection. Further, the valve stem 24 of the first on-off valve 10 is pushed down by a predetermined distance l or more to open the injection valve 17, and the soap solution is sprayed onto the surface A to be inspected surrounded by the suction rubber 7. Then, by irradiating light onto the surface A to be inspected using the light bulb 16, the leakage portion can be observed under magnification using the convex lens 3 provided at the top of the cylindrical portion 2a. If there is a leak on the surface A to be inspected, the soap film in that area will swell, making it easy to find the leak. In addition, as shown by the two-dot chain line in FIG.
may be provided. Furthermore, as shown by the dashed line in FIG. 1, a wall body 26 that widens toward the end to prevent light from being reflected on the convex lens 3 may be provided in the cylindrical portion 2a to make it easier to see the surface A to be inspected. When the leak tester 1 is removed from the surface A to be inspected, the second on-off valve 15 is opened to bring the inside of the main body 2 to atmospheric pressure, and then the suction rubber 7 is removed from the surface A to be inspected.
なお、上記実施例を示す各図面において、吸着
ラバー７は平面あるいは円周外表面に吸着可能な
形状にされているが、被検査面の形状（例えばコ
ーナ部）に合わせてその形状が変更されることは
言うまでもない。 In each of the drawings showing the above-mentioned embodiments, the suction rubber 7 is shaped so that it can be suctioned onto a flat surface or a circumferential outer surface, but the shape may be changed depending on the shape of the surface to be inspected (for example, a corner portion). Needless to say.
以上のように、本発明のリークテスターによれ
ば、必要箇所だけの漏れを容易に且つ迅速に検査
することができる。また、従来のように被検査物
の表面に予め手作業で検査液を塗布するものとは
異なり、弁操作により検査液を供給しているので
作業性の良いものにでき、さらに検査液の供給
は、吸着ラバーで吸着したのち行えることから、
この吸着ラバーによるシール性（吸着性）は好適
に維持できる。 As described above, according to the leak tester of the present invention, it is possible to easily and quickly test for leaks only at necessary locations. In addition, unlike conventional methods in which the test liquid is manually applied to the surface of the object to be inspected in advance, the test liquid is supplied by valve operation, making it easier to work with. This can be done after adsorbing with a suction rubber, so
The sealing property (adsorption property) by this adsorption rubber can be suitably maintained.
なお、本発明のリークテスターは、FRP製容
器の接合部以外に、例えば鉄鋼材料の溶接部、あ
るいはレンガ、コンクリート等、材質が粗なもの
の漏れを検査するのに有効である。 The leak tester of the present invention is effective for inspecting leaks in, for example, welded parts of steel materials, or rough materials such as bricks and concrete, in addition to the joints of FRP containers.
図面は本発明の一実施例を示すもので、第１図
は全体縦断面図、第２図は要部拡大断面図、第３
図は一部切欠使用例示図である。
１……リークテスター、２……本体、３……凸
レンズ（観察窓）、６……開口、７……吸着ラバ
ー、７ａ……吸着面、１０……第１開閉弁、１３
……真空ポンプ、１５……第２開閉弁、１６……
電球（照射体、１７……噴射弁、１７ａ……ノズ
ル部、１８……弁棒、１９……弁本体、Ａ……被
検査面。
The drawings show one embodiment of the present invention, and FIG. 1 is an overall vertical sectional view, FIG. 2 is an enlarged sectional view of the main part, and FIG.
The figure is a partially cutaway view illustrating the use. DESCRIPTION OF SYMBOLS 1... Leak tester, 2... Main body, 3... Convex lens (observation window), 6... Opening, 7... Adsorption rubber, 7a... Adsorption surface, 10... First opening/closing valve, 13
...Vacuum pump, 15...Second on-off valve, 16...
Light bulb (irradiation body, 17... injection valve, 17a... nozzle part, 18... valve stem, 19... valve body, A... surface to be inspected.
Claims (1)
に開口を設け、上記本体の他端開口端部全周に被
検査面に吸着可能な吸着ラバーを設け、上記本体
に、真空ポンプに接続可能な第１開閉弁と、大気
に連通可能な第２開閉弁とを設け、上記本体内
に、ノズル部先端が上記開口に向き且つ弁棒が上
記第１開閉弁の弁本体に対向する検査液噴射弁
と、被検査面を照射する照射体とを設けたことを
特徴とするリークテスター。1 An observation window is provided at one end of the main body, an opening is provided at the other end of the main body, a suction rubber that can be adsorbed to the surface to be inspected is provided around the entire circumference of the other open end of the main body, and a vacuum pump is attached to the main body. A connectable first on-off valve and a second on-off valve that can communicate with the atmosphere are provided in the main body, with a nozzle tip facing the opening and a valve stem facing the valve body of the first on-off valve. A leak tester characterized by being equipped with a test liquid injection valve and an irradiator that irradiates a surface to be inspected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17357180A JPS5796235A (en) | 1980-12-08 | 1980-12-08 | Leak tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17357180A JPS5796235A (en) | 1980-12-08 | 1980-12-08 | Leak tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5796235A JPS5796235A (en) | 1982-06-15 |
| JPS6256970B2 true JPS6256970B2 (en) | 1987-11-28 |
Family
ID=15963021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17357180A Granted JPS5796235A (en) | 1980-12-08 | 1980-12-08 | Leak tester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5796235A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0463952U (en) * | 1990-09-28 | 1992-06-01 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60211332A (en) * | 1984-04-06 | 1985-10-23 | Hitachi Ltd | Device for soap-bubble testing in vacuum |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5291187U (en) * | 1975-12-29 | 1977-07-07 | ||
| JPS5425884U (en) * | 1977-07-22 | 1979-02-20 |
-
1980
- 1980-12-08 JP JP17357180A patent/JPS5796235A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0463952U (en) * | 1990-09-28 | 1992-06-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5796235A (en) | 1982-06-15 |
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