JPH0214007Y2 - - Google Patents
Info
- Publication number
- JPH0214007Y2 JPH0214007Y2 JP17560782U JP17560782U JPH0214007Y2 JP H0214007 Y2 JPH0214007 Y2 JP H0214007Y2 JP 17560782 U JP17560782 U JP 17560782U JP 17560782 U JP17560782 U JP 17560782U JP H0214007 Y2 JPH0214007 Y2 JP H0214007Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- fiberscope
- diameter pipe
- fluid
- small diameter
- 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
- 238000007689 inspection Methods 0.000 claims description 21
- 239000012530 fluid Substances 0.000 claims description 20
- 230000008014 freezing Effects 0.000 claims description 10
- 238000007710 freezing Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
Landscapes
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Description
【考案の詳細な説明】
この考案は水等の流体が充満している弁の内部
を点検するための弁内部点検装置に関するもので
ある。[Detailed Description of the Invention] This invention relates to a valve interior inspection device for inspecting the interior of a valve filled with fluid such as water.
一般に、水等の流体が充満している弁におい
て、弁を分解せずにその内部を点検する場合には
フアイバースコープを利用した弁内部点検装置を
弁に連結し、フアイバースコープを弁内に挿入し
て観察や点検を行つているが、装置取付作業時に
おける流体の流出は避けることができないもので
ある。このため、従来一般には弁内部点検装置を
取付ける部分を一時的に凍結させてその凍結によ
る遮蔽効果を利用するアイス・プラグ法によつて
弁内部点検装置を取付け、解氷後に弁内にフアイ
バースコープを送り込んで点検するという方法が
とられている。しかし、弁内に圧力がかかつてい
る場合は、解氷後に弁内部点検装置の取付部から
流体が漏出したり、或は流体圧のためにフアイバ
ースコープが円滑に挿入できなくなる等の欠点が
みられる。 Generally, when inspecting the inside of a valve filled with fluid such as water without disassembling the valve, a valve internal inspection device using a fiberscope is connected to the valve, and the fiberscope is inserted into the valve. However, fluid leakage during equipment installation is unavoidable. For this reason, in the past, the valve internal inspection device was installed using the ice plug method, which involves temporarily freezing the part where the valve internal inspection device is installed and utilizing the shielding effect of the freezing. The method used is to send in and inspect the equipment. However, if there is pressure inside the valve, there are disadvantages such as fluid leaking from the mounting part of the valve internal inspection device after the ice has thawed, or the fiberscope not being able to be inserted smoothly due to the fluid pressure. It will be done.
従つて、この考案の目的はこの様な従来の欠点
を除去するために、アイス・プラツグ法によつて
弁に取付けられる弁内部点検装置に圧力室を設
け、この圧力室内の圧力を弁内の圧力と同等にし
て解氷後の弁内流体の流出を防止し、この結果フ
アイバースコープによる弁内部点検を円滑に行え
るようにした弁内部点検装置を提供することにあ
る。 Therefore, the purpose of this invention is to eliminate such conventional drawbacks by providing a pressure chamber in the valve internal inspection device that is attached to the valve by the ice plug method, and converting the pressure inside the pressure chamber into the valve internal inspection device. It is an object of the present invention to provide a valve internal inspection device that prevents the fluid inside the valve from flowing out after the ice has been thawed to the same level as the pressure, and as a result allows smooth inspection of the valve interior using a fiberscope.
この考案によれば、弁内部点検装置は、水等の
流体が充満している弁のケーシングを貫通して外
方に延びる小径管の端部に小径管内の流体の一時
的凍結による遮蔽効果を利用して取り付けられた
圧力室と、圧力室および小径管内を通つて弁内部
を点検するためのフアイバースコープと、フアイ
バースコープの移動用のスコープ送り装置とから
成り、上記圧力室は、上記弁内の圧力と同等圧力
に流体が内部に給送加圧可能に構成されている筒
状部材と、その一端に設けられており上記小径管
端部が密封状態で取り付けられる蓋板と、他端に
設けられており上記フアイバースコープを摺動可
能でかつ密封状態で貫通させて取り付けられる蓋
板とを備えていることにより、圧力室に弁内圧力
と同等の圧力をかけることによつて小径管内の凍
結部の解氷後にも弁内流体の流出を防止できるよ
うに構成されている。 According to this invention, the valve internal inspection device applies a shielding effect by temporarily freezing the fluid inside the small diameter pipe to the end of the small diameter pipe that extends outward through the valve casing filled with fluid such as water. It consists of a pressure chamber installed in the valve, a fiberscope for inspecting the inside of the valve through the pressure chamber and small diameter pipe, and a scope feeder for moving the fiberscope. a cylindrical member configured to be capable of supplying and pressurizing fluid to the inside at a pressure equivalent to the pressure of The fiberscope is provided with a cover plate that is slidable and sealed and is attached to the fiberscope, thereby applying pressure equivalent to the pressure inside the valve to the pressure chamber, thereby controlling the pressure inside the small diameter pipe. The structure is such that the fluid within the valve can be prevented from flowing out even after the frozen portion is thawed.
この考案の他の目的や特長および利点は以下の
添付図面に沿つての詳細な説明から明らかになろ
う。 Other objects, features and advantages of the invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.
図面の第１図にはこの考案の弁内部点検装置の
一実施例が示されている。図示される様に、この
考案の弁内部点検装置１０は、圧力室１１とフア
イバースコープ６とスコープ送り装置１２とから
成つている。圧力室１１は筒状部材例えば薄肉円
筒１１ａと２枚の円形の蓋板１１ｂ，１１ｃを組
合わせて成り、蓋板１１ｂ，１１ｃの中心には
夫々孔１４，１５が設けられており、一方の孔１
４には他方の孔１５に向かつて延びる案内管１６
が固着されている。フアイバースコープ６はスコ
ープ送り装置１２によつて挿入や引出しが行なわ
れるようになつており、蓋板の孔１４から案内管
１６に沿つて圧力室１１内に挿入され、フアイバ
ースコープ６の出し入れが可能に構成されたシー
ル部材１７が孔１４に施されている。 FIG. 1 of the drawings shows an embodiment of the valve internal inspection device of this invention. As shown in the figure, the valve internal inspection device 10 of this invention consists of a pressure chamber 11, a fiber scope 6, and a scope feed device 12. The pressure chamber 11 is formed by combining a cylindrical member such as a thin cylinder 11a and two circular cover plates 11b and 11c. Holes 14 and 15 are provided in the centers of the cover plates 11b and 11c, respectively. Hole 1
4 has a guide tube 16 extending toward the other hole 15.
is fixed. The fiberscope 6 is inserted and withdrawn by a scope feeder 12, and is inserted into the pressure chamber 11 through a hole 14 in the cover plate along a guide tube 16, allowing the fiberscope 6 to be inserted and withdrawn. A sealing member 17 configured as shown in FIG.
この様に構成された弁内部点検装置１０は、水
等の流体が充満している弁１の圧力抜き用の小径
管３に取付けられる。この小径管３はマツト状袋
等の凍結用治具４によつて覆われ、高圧ボンベ５
から液化炭酸ガスの様な冷凍液が凍結用治具４の
中に流し込まれて小径管３内の流体が凍結され、
小径管３の凍結部またはその外側が切断されて開
口部７が設けられている。この開口部７と圧力室
１１の孔１５が気密に取付けられ、凍結部の解氷
後に弁１内の流体や漏出しないように圧力室１１
に外部より空気等の流体を供給して弁１内の圧力
と同等の圧力をかけ解氷を待つ。この際、圧力室
１１内の圧力を知るために圧力計１３を設けてお
くと良い。解氷後、スコープ送り装置１２を作動
させてフアイバースコープ６を小径管３の開口部
７から弁１の内部の所定位置に送り込み、フアイ
バースコープ６の接眼部８から目視または写真記
録等によつて弁１内部の観察や点検を行う。弁１
内におけるフアイバースコープ６の動きを制御す
るために、第２図に示される様な複数本のワイヤ
２１を引くことによつて自在に先端部の向きを変
えることができる案内管２０にフアイバースコー
プ６を挿入して用いることが好適である。この様
にして弁１の内部点検が終了後に、スコープ送り
装置１２によつてフアイバースコープ６を小径管
３から引抜き、小径管３内の流体を凍結用治具４
を用いて再び凍結させて弁１の内部と外部とを遮
断する。弁内部点検装置１０を小径管３から取外
し、小径管３の開口部７を適宜な手段によつて塞
いで弁１内部の点検作業が完了する。また、この
実施例においては、弁１のケーシング２に設けら
れた圧力抜き用の小径管３と弁内部点検装置１０
とを連結して行うとしたが、弁内部点検用の小径
管を予め弁１のケーシング２に取付けておいても
良いことは勿論である。 The valve internal inspection device 10 configured in this manner is attached to the small diameter pipe 3 for pressure relief of the valve 1 filled with fluid such as water. This small-diameter pipe 3 is covered with a freezing jig 4 such as a mat-shaped bag, and is covered with a high-pressure cylinder 5.
A freezing liquid such as liquefied carbon dioxide gas is poured into the freezing jig 4 to freeze the fluid inside the small diameter pipe 3.
An opening 7 is provided by cutting the frozen portion of the small diameter tube 3 or the outside thereof. This opening 7 and the hole 15 of the pressure chamber 11 are attached airtightly to prevent the fluid inside the valve 1 from leaking after the frozen part is thawed.
A fluid such as air is supplied from the outside to apply a pressure equal to the pressure inside the valve 1, and the ice is thawed. At this time, it is preferable to provide a pressure gauge 13 in order to know the pressure inside the pressure chamber 11. After the ice has thawed, the scope feeding device 12 is operated to feed the fiberscope 6 into a predetermined position inside the valve 1 through the opening 7 of the small diameter tube 3, and the fiberscope 6 is inspected visually or photographed through the eyepiece 8 of the fiberscope 6. Observe and inspect the inside of valve 1. Valve 1
In order to control the movement of the fiberscope 6 within the guide tube 20, the direction of the tip can be freely changed by pulling a plurality of wires 21 as shown in FIG. It is suitable to insert and use. After the internal inspection of the valve 1 is completed in this way, the fiber scope 6 is pulled out from the small diameter pipe 3 by the scope feeder 12, and the fluid inside the small diameter pipe 3 is transferred to the freezing jig 4.
The inside and outside of the valve 1 are shut off by freezing again. The valve internal inspection device 10 is removed from the small diameter pipe 3, and the opening 7 of the small diameter pipe 3 is closed by an appropriate means to complete the inspection work inside the valve 1. In addition, in this embodiment, a small diameter pipe 3 for pressure relief provided in the casing 2 of the valve 1 and a valve internal inspection device 10 are used.
Although this is carried out by connecting the two together, it goes without saying that a small diameter pipe for inspecting the inside of the valve may be attached to the casing 2 of the valve 1 in advance.
この様に、この考案によればアイス・プラツグ
法を用いて圧力室を有する弁内部点検装置を弁と
連結し、圧力室と弁内の圧力を同等にして平衡状
態にすることによつて取付部の凍結が解けても弁
内の流体が外部に漏出する恐れがなくなり、円滑
にフアイバースコープを弁内に挿入して観察を行
うことができる。従つて、放射性物質に汚染され
た流体を扱う原子力用弁において有効な装置であ
る等の利点がある。 In this way, according to this invention, a valve internal inspection device having a pressure chamber is connected to the valve using the ice plug method, and the pressure inside the pressure chamber and the valve are made equal to create an equilibrium state. Even if the frozen part thaws, there is no risk of the fluid inside the valve leaking outside, and the fiberscope can be smoothly inserted into the valve for observation. Therefore, it has advantages such as being an effective device for nuclear power valves that handle fluids contaminated with radioactive substances.
第１図はこの考案に従つた弁内部点検装置にこ
れを取付けた弁の一部と共に示す概略説明図、第
２図はフアイバースコープの動作制御用の案内管
の斜視図である。図中、１……弁、２……ケーシ
ング、３……小径管、４……凍結用治具、５……
高圧ボンベ、６……フアイバースコープ、７……
開口部、８……接眼部、１０……弁内部点検装
置、１１……圧力室、１１ａ……薄肉円筒、１１
ｂ，１１ｃ……蓋板、１２……スコープ送り装
置、１３……圧力計、１４，１５……孔、１６…
…案内管、１７……シール部材、２０……案内
管、２１……ワイヤ。
FIG. 1 is a schematic explanatory view showing a valve internal inspection device according to the invention together with a part of the valve, and FIG. 2 is a perspective view of a guide tube for controlling the operation of a fiberscope. In the figure, 1... valve, 2... casing, 3... small diameter pipe, 4... freezing jig, 5...
High pressure cylinder, 6... fiberscope, 7...
Opening, 8... Eyepiece, 10... Valve internal inspection device, 11... Pressure chamber, 11a... Thin cylinder, 11
b, 11c... Lid plate, 12... Scope feeding device, 13... Pressure gauge, 14, 15... Hole, 16...
...Guide tube, 17...Sealing member, 20...Guide tube, 21...Wire.
Claims (1)
通して外方に延びる小径管の内部の流体の一時的
凍結による遮蔽効果が利用される上記小径管の端
部に上記遮蔽効果を利用して取り付けられる圧力
室と、圧力室および小径管内を通つて弁内部を点
検するためのフアイバースコープと、フアイバー
スコープの移動用のスコープ送り装置とから成
り、上記圧力室は、上記弁内の圧力と同等圧力に
流体が内部に給送加圧可能に構成されている筒状
部材と、その一端に設けられており上記小径管端
部が密封状態で取り付けられる蓋板と、他端に設
けられており上記フアイバースコープを摺動可能
でかつ密封状態で貫通させて取り付けられる蓋板
とを備えていることを特徴とする弁内部点検装
置。 The above-mentioned shielding effect is utilized at the end of the small-diameter pipe in which the shielding effect is utilized due to temporary freezing of the fluid inside the small-diameter pipe that extends outward through the casing of the valve filled with fluid such as water. It consists of a pressure chamber that is attached to the valve, a fiberscope that passes through the pressure chamber and small diameter pipe to inspect the inside of the valve, and a scope feeder for moving the fiberscope. A cylindrical member configured to be able to supply and pressurize fluid to the same pressure inside, a cover plate provided at one end of the member and to which the end of the small diameter pipe is attached in a sealed state, and a cover plate provided at the other end. A valve internal inspection device comprising: a lid plate which is slidable and sealed through the fiberscope and is attached to the fiberscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17560782U JPS5979818U (en) | 1982-11-22 | 1982-11-22 | Valve internal inspection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17560782U JPS5979818U (en) | 1982-11-22 | 1982-11-22 | Valve internal inspection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5979818U JPS5979818U (en) | 1984-05-30 |
| JPH0214007Y2 true JPH0214007Y2 (en) | 1990-04-17 |
Family
ID=30382008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17560782U Granted JPS5979818U (en) | 1982-11-22 | 1982-11-22 | Valve internal inspection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5979818U (en) |
-
1982
- 1982-11-22 JP JP17560782U patent/JPS5979818U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5979818U (en) | 1984-05-30 |
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