JP3004547B2 - Seal cover - Google Patents
Seal coverInfo
- Publication number
- JP3004547B2 JP3004547B2 JP6240265A JP24026594A JP3004547B2 JP 3004547 B2 JP3004547 B2 JP 3004547B2 JP 6240265 A JP6240265 A JP 6240265A JP 24026594 A JP24026594 A JP 24026594A JP 3004547 B2 JP3004547 B2 JP 3004547B2
- Authority
- JP
- Japan
- Prior art keywords
- seal cover
- gas
- pipe
- pressure
- radioactive
- 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
Landscapes
- Examining Or Testing Airtightness (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は放射性物質等の有害物質
を内包する管、容器等の継手部、軸貫通部を覆うための
気密性を有する金属カバー等に利用可能なシールカバー
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal cover which can be used for a pipe containing a harmful substance such as a radioactive substance, a joint part of a container or the like, and an airtight metal cover for covering a shaft penetration part. is there.
【０００２】[0002]
【従来の技術】一般に、放射性物質を内包する管、容器
等の継手部、軸貫通部を覆うための気密性を有する金属
性カバーとして、シールカバーが使用されている。従来
使用されているシールカバーを図４により説明すると、
放射性物質を内包する２本の管１，１は管継手２で接続
され、この継手部をシールカバー３で気密を保って覆っ
ている。シールカバー３には、プラグ５が付けられたノ
ズル４が１箇所設けられており、このプラグ付ノズル４
は、シールカバー３の耐圧検査に使用し、検査後はプラ
グをシール溶接してシールカバーの気密性を確保するよ
うにしている。そのため、シールカバーの気密性検査
は、シールカバーを取り付ける管や容器等と一緒に一括
して、取り付く管、容器等で放射性物質等有害物質を取
り扱う前に実施している。2. Description of the Related Art In general, a seal cover is used as an air-tight metal cover for covering a joint portion such as a tube or a container containing a radioactive substance and a shaft through portion. A conventionally used seal cover will be described with reference to FIG.
The two pipes 1 and 1 containing a radioactive substance are connected by a pipe joint 2, and this joint is covered with a seal cover 3 in a gas-tight manner. The seal cover 3 is provided with one nozzle 4 to which a plug 5 is attached.
Is used for the pressure test of the seal cover 3, and after the test, the plug is sealed and welded to secure the airtightness of the seal cover. For this reason, the airtightness inspection of the seal cover is performed together with the pipe or the container to which the seal cover is attached and before the handling of the radioactive substance or the harmful substance in the pipe or the container to be attached.
【０００３】[0003]
【発明が解決しようとする課題】従来のシールカバー
は、取り付く管、容器等で放射性物質等有害物質を取り
扱う前に一緒に一括して気密性検査を実施しているが、
管、容器等で放射性物質を取り扱った後は、放射性物質
の漏洩防止等を考慮すると気密性検査を実施するのが困
難である。また、従来のシールカバーは、密閉構造であ
るため、温度変化に伴って内部ガス圧力も変化し、その
最大変化を考慮した構造強度が要求される。Conventional seal covers are subjected to an airtightness inspection together before handling harmful substances such as radioactive substances in pipes and containers to be attached.
After handling radioactive materials in pipes, containers, etc., it is difficult to perform an airtightness inspection in consideration of prevention of radioactive material leakage. Further, since the conventional seal cover has a hermetically sealed structure, the internal gas pressure also changes with a change in temperature, and structural strength is required in consideration of the maximum change.
【０００４】本発明はかかる事情に鑑みてなされたもの
で、管、容器等で放射性物質を取り扱った後でも容易に
気密性検査を実施できるともともに、気密構造による内
部ガス圧力の影響を受けないシールカバーを提供するこ
とを目的とする。The present invention has been made in view of such circumstances, and it is possible to easily perform an airtightness inspection even after handling a radioactive substance in a pipe, a container, or the like, and is not affected by internal gas pressure due to the airtight structure. An object is to provide a seal cover.
【０００５】[0005]
【課題を解決するための手段】本発明は、放射性物質等
の有害物質を内包する管、容器等の接続部を気密性を有
する金属性カバーで覆ったシールカバーに、放射性物質
等の有害物質の漏洩を防止するためのダストフィルタを
有するノズルを２個以上設けること、また、必要に応じ
ガス吸着器を設けたことを特徴とする。According to the present invention, there is provided a seal cover in which a connecting portion of a pipe or a container containing a harmful substance such as a radioactive substance is covered with an airtight metal cover, and a harmful substance such as a radioactive substance. It is characterized in that two or more nozzles having a dust filter for preventing leakage of gas are provided, and a gas adsorber is provided if necessary.
【０００６】[0006]
【作用】本発明は、放射性物質を取り扱っている管、容
器等の一部を改造し、その継手部にシールカバーを設け
た場合に、ダストフィルタを有するノズルを２個以上設
けることにより、ダストフィルタを通してシールカバー
内に試験ガスを供給することができるので、シールカバ
ー単独で気密性の検査を行うことが可能であり、検査
後、ダストフィルタを通してシールカバー内を大気圧に
開放することにより、シールカバー内のガス温度が変化
しても、ガス圧力を一定に押さえることが可能となる。According to the present invention, when a part of a pipe or a container handling radioactive materials is modified and a seal cover is provided at a joint thereof, two or more nozzles having a dust filter are provided, thereby reducing dust. Since the test gas can be supplied into the seal cover through the filter, it is possible to perform an airtightness inspection with the seal cover alone.After the inspection, the inside of the seal cover is opened to the atmospheric pressure through the dust filter. Even if the gas temperature in the seal cover changes, the gas pressure can be kept constant.
【０００７】[0007]
【実施例】図１は本発明のシールカバーを管継手部に使
用した一実施例を示す図である。図において、管１，１
は放射性物質を内包しており、管継手２で接続されてい
る。管継手２は放射性物質の漏洩がないような気密構造
となっているが、さらにその気密性を保持するため、例
えば、金属性のシールカバー本体３で管継手２及び管１
の一部を気密に覆うようにする。このシールカバー本体
３には、万一、管継手２を通してダスト状の放射性物質
の漏洩があった場合にも、これが大気中へ漏洩するのを
防止するためのダストフィルタ４，４を有する２個以上
のノズル６，６を取り付け、さらに必要に応じてノズル
にはガス状の放射性物質の漏洩を防止するためのガス吸
着器５を設ける。FIG. 1 is a view showing an embodiment in which the seal cover of the present invention is used for a pipe joint. In the figure, tubes 1, 1
Contain a radioactive substance and are connected by a pipe joint 2. Although the pipe joint 2 has an airtight structure in which no radioactive substance leaks out, in order to further maintain the airtightness, for example, the pipe joint 2 and the pipe 1 are connected with a metallic seal cover body 3.
Part of the airtight. This seal cover body 3 has two dust filters 4 and 4 for preventing the leakage of dusty radioactive substances into the atmosphere even in the event that dusty radioactive substances are leaked through the pipe joint 2. The nozzles 6 and 6 described above are attached, and a gas adsorber 5 for preventing leakage of gaseous radioactive substances is provided on the nozzles as necessary.
【０００８】気密検査時には、一方のノズル６を入口側
として、止弁８が設けられた仮設配管７を介して試験ガ
スボンベ９を接続し、他方のノズル６を出口側として、
止弁８が設けられた仮設配管７を接続するとともに、圧
力計１０を配管に接続する。気密検査は、例えば、出口
側止弁８を締め、入口側止弁８を開いてダストフィルタ
４、ガス吸着器５を通して試験ガスをシールカバー内に
所定圧力で充填し、入口側止弁８を締めて圧力計１０に
より所定圧力を確認し所定時間後、図示しないガス検知
器によりシールカバー周囲にリークが認められるか否か
により行う。このように、ダストフィルタ、ガス吸着器
を通して試験ガスを充填するので、放射性物質を取り扱
った後でも、容易にシールカバーの気密検査対象部の気
密検査を行うことができる。At the time of airtight inspection, a test gas cylinder 9 is connected through a temporary pipe 7 provided with a stop valve 8 with one nozzle 6 as an inlet side, and the other nozzle 6 as an outlet side.
The temporary pipe 7 provided with the stop valve 8 is connected, and the pressure gauge 10 is connected to the pipe. In the airtight inspection, for example, the outlet side stop valve 8 is closed, the inlet side stop valve 8 is opened, the test gas is filled into the seal cover through the dust filter 4 and the gas adsorber 5 at a predetermined pressure, and the inlet side stop valve 8 is closed. The pressure is checked by the pressure gauge 10, and after a predetermined time, the determination is made based on whether or not a leak is recognized around the seal cover by a gas detector not shown. As described above, since the test gas is filled through the dust filter and the gas adsorber, the airtight inspection of the airtight inspection target portion of the seal cover can be easily performed even after handling the radioactive substance.
【０００９】検査後、仮設配管７、止弁８、試験ガスボ
ンベ９、圧力計１０を取り外す。この状態で、シールカ
バー内はダストフィルタ４、ガス吸着器５を通して大気
に開放されるためシールカバー内のガス温度変化による
圧力変動を防止することができ、シールカバーの設計圧
力をほぼ大気圧程度に押さえることができる。After the inspection, the temporary pipe 7, the stop valve 8, the test gas cylinder 9, and the pressure gauge 10 are removed. In this state, since the inside of the seal cover is opened to the atmosphere through the dust filter 4 and the gas adsorber 5, pressure fluctuation due to a change in gas temperature in the seal cover can be prevented, and the design pressure of the seal cover is set to approximately the atmospheric pressure. Can be held down.
【００１０】図２は本発明のシールカバーを容器蓋部分
に使用した他の実施例を示す図であり、図１と同一参照
数字は同一内容を示している。なお、２０は放射性物質
を取り扱う容器、２１は容器蓋である。本実施例におい
ては、容器蓋２１の縁の部分を本発明のシールカバー３
で覆うようにし、図１におけると同様に、シールカバー
本体にダストフィルタ４、さらに必要に応じてガス吸着
器５を有する２個以上のノズル６を取り付け、一方のノ
ズルに試験ガスボンベ９、他方のノズル側に圧力計１０
を接続する。このような構成とすることにより、図１の
場合と同様に、放射性物質を取り扱った後でも、容易に
シールカバーの気密検査対象部の気密検査を行うことが
できるとともに、シールカバー内のガス温度変化による
圧力変動を防止することができ、シールカバーの設計圧
力をほぼ大気圧程度に押さえることができる。FIG. 2 is a view showing another embodiment in which the seal cover of the present invention is used for a container lid, and the same reference numerals as those in FIG. 1 indicate the same contents. In addition, 20 is a container for handling radioactive substances, and 21 is a container lid. In this embodiment, the edge portion of the container lid 21 is attached to the seal cover 3 of the present invention.
In the same manner as in FIG. 1, a dust filter 4 and, if necessary, two or more nozzles 6 having a gas adsorber 5 are attached to the seal cover body, and a test gas cylinder 9 is attached to one nozzle and the other is attached. Pressure gauge 10 on the nozzle side
Connect. With such a configuration, as in the case of FIG. 1, even after handling the radioactive material, the airtightness inspection of the airtightness inspection target portion of the seal cover can be easily performed, and the gas temperature in the seal cover can be improved. Pressure fluctuation due to the change can be prevented, and the design pressure of the seal cover can be suppressed to approximately the atmospheric pressure.
【００１１】図３は本発明のシールカバーを軸貫通部に
使用した他の実施例を示す図であり、図１、図２と同一
参照数字は同一内容を示している。なお、３０は機器本
体、３１は軸受、３２は軸である。本実施例は、放射性
物質を取り扱う機器本体３０を軸３２が軸受３１を通し
て貫通している部分を本発明のシールカバー３で覆うよ
うにしたものであり、図１、図２の場合と同様に、シー
ルカバー本体にダストフィルタ４、さらに必要に応じて
ガス吸着器５を有する２個以上のノズル６を取り付け、
一方のノズルに試験ガスボンベ９、他方のノズル側に圧
力計１０を接続する。このような構成とすることによ
り、図１、図２の場合と同様に、放射性物質を取り扱っ
た後でも、容易にシールカバーの気密検査対象部の気密
検査を行うことができるとともに、シールカバー内のガ
ス温度変化による圧力変動を防止し、シールカバーの設
計圧力をほぼ大気圧程度に押さえることができる。FIG. 3 is a view showing another embodiment in which the seal cover of the present invention is used for a shaft penetrating portion, and the same reference numerals as those in FIGS. 1 and 2 indicate the same contents. In addition, 30 is an apparatus main body, 31 is a bearing, and 32 is a shaft. In the present embodiment, a portion where a shaft 32 penetrates a device body 30 handling a radioactive substance through a bearing 31 is covered with a seal cover 3 of the present invention, as in the case of FIGS. 1 and 2. A dust filter 4 and, if necessary, two or more nozzles 6 having a gas adsorber 5 are attached to the seal cover body,
A test gas cylinder 9 is connected to one nozzle, and a pressure gauge 10 is connected to the other nozzle. With such a configuration, as in the case of FIGS. 1 and 2, even after handling the radioactive material, the airtightness inspection of the airtightness inspection target portion of the seal cover can be easily performed, and the inside of the seal cover can be easily inspected. The pressure fluctuation due to the gas temperature change can be prevented, and the design pressure of the seal cover can be suppressed to approximately the atmospheric pressure.
【００１２】[0012]
【発明の効果】以上のように本発明によれば、以下のよ
うな効果が奏せられる。 シールカバーに放射性物質等の有害物質の漏洩を防止
するためのダストフィルタ（必要に応じてガス吸着器）
を有するノズルを２個以上設けることにより、シールカ
バーの気密検査対象部の気密検査を容易に実施すること
ができる。 シールカバーの気密検査後、ダストフィルタ、ガス吸
着器を通してシールカバー内の大気に開放することによ
り、シールカバー内のガス温度変化による圧力変動を防
止することができ、シールカバーの設計圧力を小さく
（ほぼ大気圧に）押さえることができる。As described above, according to the present invention, the following effects can be obtained. Dust filter (gas adsorber if necessary) to prevent leakage of harmful substances such as radioactive substances into the seal cover
By providing two or more nozzles having the above, it is possible to easily perform an airtightness inspection of the portion to be subjected to the airtightness inspection of the seal cover. After the seal cover is inspected for airtightness, by opening to the atmosphere inside the seal cover through a dust filter and a gas adsorber, it is possible to prevent pressure fluctuation due to gas temperature change inside the seal cover and reduce the design pressure of the seal cover ( (Almost to atmospheric pressure).
【図１】 管継手部に使用した本発明のシールカバーを
示す図である。FIG. 1 is a view showing a seal cover of the present invention used for a pipe joint.
【図２】 容器蓋部に使用した本発明のシールカバーを
示す図である。FIG. 2 is a view showing a seal cover of the present invention used for a container lid.
【図３】 軸貫通部に使用した本発明のシールカバーを
示す図である。FIG. 3 is a view showing a seal cover of the present invention used for a shaft penetration portion.
【図４】 従来使用されているシールカバーを示す図で
ある。FIG. 4 is a view showing a seal cover conventionally used.
１…管、２…管継手、３…シールカバー本体、４…ダス
トフィルタ、５…ガス吸着器、６…シールカバーノズ
ル、７…仮設配管、８…止弁、９…試験ガスボンベ、１
０…圧力計、２０…容器、２１…容器蓋、３０…機器本
体、３１…軸受、３２…軸。DESCRIPTION OF SYMBOLS 1 ... Pipe, 2 ... Fitting, 3 ... Seal cover body, 4 ... Dust filter, 5 ... Gas adsorber, 6 ... Seal cover nozzle, 7 ... Temporary piping, 8 ... Stop valve, 9 ... Test gas cylinder, 1
0: pressure gauge, 20: container, 21: container lid, 30: device body, 31: bearing, 32: shaft.
フロントページの続き (72)発明者 岸本 巌 大阪府大阪市此花区西九条５丁目３番28 号日立造船株式会社内 (72)発明者 竹井芳敬 大阪府大阪市此花区西九条５丁目３番28 号日立造船株式会社内 (56)参考文献 特開 平３−150441（ＪＰ，Ａ) 特開 平６−82536（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G21F 3/00 G01M 3/04 Continued on the front page (72) Inventor Iwao Kishimoto 5-3-28 Nishikujo, Konohana-ku, Osaka-shi, Japan Inside Hitachi Zosen Corporation (72) Inventor Yoshitaka Takei 5-28-3, Nishikujo, Konohana-ku, Osaka-shi, Osaka (56) References JP-A-3-150441 (JP, A) JP-A-6-82536 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G21F 3/00 G01M 3/04
Claims (2)
し、放射性物質等を取り扱うための管、容器、機器等の
接続部を覆うための金属性シールカバーにおいて、少な
くともダストフィルタを有する検査用ノズルを２個以上
設けたことを特徴とするシールカバー。An inspection nozzle having an inspection nozzle for introducing a test gas, and a metallic seal cover for covering a connection portion of a pipe, a container, a device, and the like for handling a radioactive material, etc. A seal cover comprising two or more nozzles.
さらに、検査用ノズルにガス吸着器を設けたことを特徴
とするシールカバー。2. The seal cover according to claim 1, wherein
Furthermore, a seal cover, wherein a gas adsorber is provided in the inspection nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6240265A JP3004547B2 (en) | 1994-10-04 | 1994-10-04 | Seal cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6240265A JP3004547B2 (en) | 1994-10-04 | 1994-10-04 | Seal cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08105996A JPH08105996A (en) | 1996-04-23 |
| JP3004547B2 true JP3004547B2 (en) | 2000-01-31 |
Family
ID=17056927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6240265A Expired - Fee Related JP3004547B2 (en) | 1994-10-04 | 1994-10-04 | Seal cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3004547B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004183849A (en) * | 2002-12-06 | 2004-07-02 | Jc Staff:Kk | Water leakage finding device of pipe joint portion |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132787B (en) * | 2013-07-23 | 2018-01-02 | 河南航天精工制造有限公司 | Quick release buckle locking property detection method and device |
| CN105675231B (en) * | 2016-02-22 | 2019-02-15 | 中航光电科技股份有限公司 | A kind of negative-pressure sealing detection device |
| CN111678660B (en) * | 2020-06-22 | 2022-03-29 | 南通科达建材科技股份有限公司 | Floor joint close inspection device for assembly type building |
| GB202114140D0 (en) * | 2021-10-01 | 2021-11-17 | Ikm Testing Uk Ltd | Apparatus, system and method for use in gas emission detection and/or quanti-fication |
-
1994
- 1994-10-04 JP JP6240265A patent/JP3004547B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004183849A (en) * | 2002-12-06 | 2004-07-02 | Jc Staff:Kk | Water leakage finding device of pipe joint portion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08105996A (en) | 1996-04-23 |
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