JPH0627893Y2 - Seal-off valve safety cap - Google Patents
Seal-off valve safety capInfo
- Publication number
- JPH0627893Y2 JPH0627893Y2 JP2591189U JP2591189U JPH0627893Y2 JP H0627893 Y2 JPH0627893 Y2 JP H0627893Y2 JP 2591189 U JP2591189 U JP 2591189U JP 2591189 U JP2591189 U JP 2591189U JP H0627893 Y2 JPH0627893 Y2 JP H0627893Y2
- Authority
- JP
- Japan
- Prior art keywords
- seal
- valve
- safety cap
- circumference
- flange portion
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 description 12
- 239000000428 dust Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Safety Valves (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、シールオフ弁に冠着され、シールオフ弁の
ポートの飛び抜けを防止するシールオフ弁安全キヤツプ
（以下「安全キヤツプ」と略す）に関するものである。[Detailed Description of the Invention] [Industrial field of application] This invention is a seal-off valve safety cap (hereinafter abbreviated as "safety cap") that is attached to a seal-off valve and prevents the seal-off valve port from slipping through. It is about.
一般に、真空断熱配管，真空断熱容器および真空二重殻
装置は断熱性が必要とされ、このようなもののうち断熱
性を有する流体輸送管として、実開昭５９−１０５６８
８号公報に開示されたようなものがある。このような、
流体輸送管１は、第７図に示すような二重構造になつて
おり、極低温流体または高温流体が流れる内管２を外管
３内に収容し、上記内管２と外管３との間の空隙に断熱
材を充填するとともに、その空隙内を真空排気して断熱
層４を形成している。そして、外管３にシールオフ弁５
を設け、内管２からのガスリーク等に起因する、断熱層
４内の圧力の異常上昇時に、上記シールオフ弁５のポー
ト７を圧力により吹き飛ばさせガスを外部に吐出させる
ことにより輸送管１の破壊を防止するようになつてい
る。このような構造のシールオフ弁５には安全キヤツプ
１０が冠着されているが、この種の安全キヤツプ１０は
単に雨水の侵入防止が配慮されているだけで、ポート飛
び抜けに対しての安全対策は何らなされていない。In general, the vacuum heat insulating pipe, the vacuum heat insulating container and the vacuum double shell device are required to have heat insulating property.
There is one disclosed in Japanese Patent No. like this,
The fluid transport pipe 1 has a double structure as shown in FIG. 7, in which an inner pipe 2 in which a cryogenic fluid or a high temperature fluid flows is housed in an outer pipe 3, and the inner pipe 2 and the outer pipe 3 are The space between the spaces is filled with a heat insulating material, and the space is evacuated to form the heat insulating layer 4. Then, the seal-off valve 5 is attached to the outer pipe 3.
Is provided, the port 7 of the seal-off valve 5 is blown off by the pressure when the pressure in the heat insulating layer 4 is abnormally increased due to the gas leak from the inner pipe 2, and the gas is discharged to the outside. It is designed to prevent destruction. A safety cap 10 is attached to the seal-off valve 5 having such a structure. However, the safety cap 10 of this type is merely designed to prevent rainwater from entering, and is a safety measure against port slip-out. Nothing has been done.
このため本考案者は、第８図に示すように、上記安全キ
ヤツプ１０をプラスチツクのような可撓性の材料で有天
筒状に形成し、その周壁に圧逃し孔１１を形成すると同
時に、下端開口部内周壁に、円周に沿つてシールオフ弁
５のフランジ部１３と係合しうる抜け止め用の凸部１２
を形成した安全キヤツプを考案し、すでに出願（実願昭
６２−１５６９３号（実開昭６３−１２３８７２号））
している。この安全キヤツプ１０はその弾性を利用して
第８図に示すようにシールオフ弁５の外周に取り付けら
れ、異常事態時には、そのポート７の飛び出し圧力によ
つて上方に押し上げられる。しかし、この際、抜け止め
用の凸部１２が、シールオフ弁５のフランジ部１３と係
合することにより外れ止めされ、それによつてポート７
の飛び抜けが防止される。しかしながら、休業前に、夜
間等においてこのような異常事態が生じ、それによつ
て、多数設けられているシールオフ弁の中の特定のシー
ルオフ弁が異常作動していても、液体輸送の始動に際し
て、これを見分けることはできない。すなわち、上記安
全キヤツプ１０は、異常事態発生後流体輸送が中止され
た段階で第８図に示す元の状態に戻るため、外観から
は、異常事態発生の有無を識別することはできない。し
たがつて、上記始動時には、作業員が、いちいち、全て
のシールオフ弁につき、安全キヤツプを取り外して内部
のポートの状態を調べているのが実情である。また、上
記安全キヤツプ１０はシールオフ弁５に対して固定され
ていないため、シールオフ弁５が下向きに取りつけられ
ていたりするような時には、装着することができない。
しかも、シールオフ弁５のフランジ部１３と安全キヤツ
プ１０の内周面との隙間から雨水や塵埃が侵入する可能
性もある。Therefore, as shown in FIG. 8, the inventor of the present invention forms the safety cap 10 with a flexible material such as plastic in the shape of a heavenly cylinder, and forms a pressure relief hole 11 on the peripheral wall thereof, at the same time. On the inner peripheral wall of the lower end opening, a protrusion 12 for retaining that can engage with the flange portion 13 of the seal-off valve 5 along the circumference.
We have devised a safety cap that has been formed and applied for it (Practical application No. 62-15693 (No. Sho 63-123872))
is doing. This safety cap 10 is attached to the outer circumference of the seal-off valve 5 by utilizing its elasticity as shown in FIG. 8, and in an abnormal situation, it is pushed up by the pop-out pressure of its port 7. However, at this time, the retaining projection 12 is prevented from coming off by engaging with the flange portion 13 of the seal-off valve 5, whereby the port 7 is prevented.
Is prevented from jumping through. However, before closing, such an abnormal situation occurs at night, etc., and as a result, even if a specific seal-off valve among a large number of seal-off valves is abnormally operated, the liquid transport is started. , I can't tell this. That is, since the safety cap 10 returns to the original state shown in FIG. 8 when the fluid transportation is stopped after the occurrence of the abnormal situation, it is not possible to distinguish from the appearance whether or not the abnormal situation has occurred. Therefore, at the time of the above-mentioned start, the worker actually removes the safety caps of all the seal-off valves and checks the state of the internal ports. Further, since the safety cap 10 is not fixed to the seal-off valve 5, it cannot be mounted when the seal-off valve 5 is mounted downward.
Moreover, rainwater or dust may enter through the gap between the flange portion 13 of the seal-off valve 5 and the inner peripheral surface of the safety cap 10.
この考案は、このような事情に鑑みなされたもので、異
常事態の発生が肉眼で簡単に識別でき、かつシールオフ
弁がどのような取り付け角度に設けられていても適応す
ることができ、しかも、雨水や塵埃がシールオフ弁の内
部に侵入することのないシールオフ弁安全キヤツプの提
供を目的とする。The present invention has been made in view of such circumstances, the occurrence of an abnormal situation can be easily identified with the naked eye, and the seal-off valve can be adapted to whatever mounting angle is provided. The purpose of the present invention is to provide a seal-off valve safety cap in which rainwater and dust do not enter the inside of the seal-off valve.
上記の目的を達成するため、この考案のシールオフ弁安
全キヤツプは、筒状開口部の外周に円周に沿つてフラン
ジ部が形成されたシールオフ弁に冠着する有天筒状の可
撓性シールオフ弁安全キヤツプであつて、周壁に圧逃し
孔が形成されているとともに、下端開口部の内周壁に円
周に沿つて、上記シールオフ弁のフランジ部と係合しう
る抜け止め用の凸部が形成され、上記シールオフ弁のフ
ランジ部のうけ根に対応する内周壁の部分に円周に沿つ
て弾性突条が設けられているという構成をとる。In order to achieve the above-mentioned object, the seal-off valve safety cap of the present invention is a flexible pipe having a cylindrical shape with a ceiling, which is attached to a seal-off valve having a flange portion along the circumference of the cylindrical opening. Seal-off valve safety cap, which has a pressure relief hole formed in its peripheral wall, and which prevents engagement with the flange portion of the seal-off valve along the circumference of the inner peripheral wall of the lower end opening. Is formed, and an elastic ridge is provided along the circumference on a portion of the inner peripheral wall corresponding to the root of the flange portion of the seal-off valve.
すなわち、この考案のシールオフ弁安全キヤツプ（以下
「安全キヤツプ」と略す）は、シールオフ弁のフランジ
部の付け根に対応する内周壁の部分に、円周に沿つて弾
性突条を設けているため、取り付け状態では、弾性突条
がフランジに圧接し、フランジと安全キヤツプの内周壁
面との隙間を塞ぐ。したがつて、雨水や塵埃の侵入が阻
止されるようになる。そして、異常高圧等の異常事態の
発生時には、シールオフ弁を通つてポートを押し上げな
がら噴き出す流体の圧力により安全キヤツプが押し上げ
られ、その際弾性突条は、それ自身弾性変形してフラン
ジ部を乗り越える。その結果、安全キヤツプが上昇し異
常高圧を逃す状態になる。そして、異常高圧が元に戻つ
た段階では安全キヤツプは下降するが、その際、弾性突
条がシールオフ弁のフランジ部の上端に引つかかつた状
態になるため、安全キヤツプは元の位置よりやや上方に
位置することになる。したがつて、シールオフ弁の位置
を確認する事により、異常事態が生じた部分のシールオ
フ弁を簡単に識別することができるようになる。That is, the seal-off valve safety cap of the present invention (hereinafter referred to as "safety cap") has an elastic ridge along the circumference on the inner peripheral wall portion corresponding to the root of the flange portion of the seal-off valve. Therefore, in the mounted state, the elastic ridges are pressed against the flange to close the gap between the flange and the inner peripheral wall surface of the safety cap. Therefore, the intrusion of rainwater and dust will be blocked. When an abnormal situation such as an abnormally high pressure occurs, the safety cap is pushed up by the pressure of the fluid ejected while pushing up the port through the seal-off valve, at which time the elastic ridge itself elastically deforms and rides over the flange portion. . As a result, the safety cap rises and the abnormal high pressure is released. Then, when the abnormal high pressure returns to its original position, the safety cap descends, but at that time, the elastic projection is stuck on the upper end of the flange portion of the seal-off valve, and therefore the safety cap is at its original position. It will be located slightly above. Therefore, by confirming the position of the seal-off valve, it becomes possible to easily identify the seal-off valve in the portion where the abnormal situation has occurred.
つぎに、実施例について説明する。Next, examples will be described.
第１図および第２図はこの考案の安全キヤツプ一実施例
を示している。この実施例では、シールオフ弁５のフラ
ンジ部１３の付け根に対応する内周壁の部分に、円周に
沿つて凹溝２０が形成され、その凹溝２０内にゴム製の
Ｏ−リング２１が嵌挿されている。それ以外の部分は、
第７図の安全キヤツプと同様である。1 and 2 show an embodiment of the safety cap of the present invention. In this embodiment, a groove 20 is formed along the circumference in a portion of the inner peripheral wall corresponding to the root of the flange portion 13 of the seal-off valve 5, and a rubber O-ring 21 is formed in the groove 20. It has been inserted. Other than that,
This is similar to the safety cap shown in FIG.
このように構成したため、安全キヤツプ１０を装着した
段階（ノーマル状態）では、第２図に示すようにＯ−リ
ング２１がシールオフ弁５のフランジ部１３に圧接し、
シールオフ弁５の外周と安全キヤツプ１０の内周壁との
隙間を塞ぐ。したがつて、上記隙間からの雨水や塵埃の
侵入が阻止されるようになる。また、上記Ｏ−リング２
１により安全キヤツプ１０がシールオフ弁５に固定され
た状態となるため、シールオフ弁５がどのような向きに
設けられていても対応できるようになる。そして、異常
高圧が生じた時には、そのガス圧によつて安全キヤツプ
１０が第３図のように押し上げられる。この状態では、
Ｏ−リング２１は、フランジ部１３との摩擦によつて凹
溝２０内に押し込まれる。そして、この状態からガス圧
によつてさらに安全キヤツプ１０が限度一杯迄押し上げ
られ、安全キヤツプ１０の圧逃し孔１１からガスが吐出
する。ガスの吐出により、上記異常高圧が解消した時に
は、安全キヤツプ１０はそれ自身の自重により下降する
が、この場合、Ｏ−リング２１が第４図に示すように、
シールオフ弁５のフランジ部１３に引つかかるため、そ
の位置で止まる。したがつて、安全キヤツプ１０は第２
図に示すノーマル位置より高い位置で止まることとなる
ため、安全キヤツプ１０の高さを調べることにより、異
常高圧が発生してポート７が飛び出したままのシールオ
フ弁５を容易に発見することができる。そして、安全キ
ヤツプ１０を弾性変形させてシールオフ弁５から取り外
しついでポート７を元の状態におさめることにより適性
状態に戻すことが行われる。With this configuration, at the stage of mounting the safety cap 10 (normal state), the O-ring 21 is pressed against the flange portion 13 of the seal-off valve 5 as shown in FIG.
The gap between the outer periphery of the seal-off valve 5 and the inner peripheral wall of the safety cap 10 is closed. Therefore, invasion of rainwater and dust from the gap can be prevented. Also, the O-ring 2
Since the safety cap 10 is fixed to the seal-off valve 5 by 1, it is possible to cope with the seal-off valve 5 in any orientation. Then, when an abnormally high pressure occurs, the safety cap 10 is pushed up by the gas pressure as shown in FIG. In this state,
The O-ring 21 is pushed into the groove 20 by friction with the flange portion 13. Then, from this state, the safety cap 10 is further pushed up to the limit by the gas pressure, and the gas is discharged from the pressure relief hole 11 of the safety cap 10. When the abnormal high pressure is eliminated by the discharge of gas, the safety cap 10 descends due to its own weight. In this case, the O-ring 21 is, as shown in FIG.
Since the flange portion 13 of the seal-off valve 5 is caught, it stops at that position. Therefore, the safety cap 10 is the second
Since it will stop at a position higher than the normal position shown in the figure, by checking the height of the safety cap 10, it is possible to easily find the seal-off valve 5 in which an abnormally high pressure has occurred and the port 7 is still protruding. it can. Then, the safety cap 10 is elastically deformed to be removed from the seal-off valve 5, and then the port 7 is returned to its original state to restore the proper state.
第５図はこの考案の他の実施例を示している。この安全
キヤツプ１０は、下端側の開口部から、シールオフ弁５
のフランジ部１３の厚み分だけ上方の位置に、円周に沿
つて所定間隔で凸部２２が一体形成されている。それ以
外は、第１図の安全キヤツプと同じである。このように
構成することにより、異常事態発生後、元の状態に戻る
際に、安全キヤツプ１０の凸部２２がシールオフ弁５の
フランジ部１３に引つかかるため、安全キヤツプが第１
図の実施例よりも高い位置で停止する。したがつて、異
常高圧が生じた部分のシールオフ弁５をより正確に識別
できるようになる。FIG. 5 shows another embodiment of the present invention. This safety cap 10 is provided with a seal-off valve 5 from the opening on the lower end side.
The convex portions 22 are integrally formed at predetermined positions along the circumference at a position above the thickness of the flange portion 13 by. Otherwise, it is the same as the safety cap shown in FIG. With this configuration, when the original state is restored after the occurrence of an abnormal situation, the convex portion 22 of the safety cap 10 is caught on the flange portion 13 of the seal-off valve 5, so that the safety cap is the first.
It stops at a higher position than the embodiment shown. Therefore, it becomes possible to more accurately identify the seal-off valve 5 in the portion where the abnormally high pressure occurs.
なお、上記の実施例では、弾性突条としてＯ−リング２
１を用いているが、これに限定するものではなく、例え
ば弾性を有する線条体を安全キヤツプ１０と一体的に設
けるようにしてもよい。また、第２の実施例における突
起２２に代えてゴム等を円周の全体に接着剤で取りつけ
てもよい。In the above embodiment, the O-ring 2 is used as the elastic ridge.
However, the present invention is not limited to this, and for example, an elastic filament may be provided integrally with the safety cap 10. Further, instead of the protrusions 22 in the second embodiment, rubber or the like may be attached to the entire circumference with an adhesive.
この考案のシールオフ弁安全キヤツプは以上のように構
成されているため、シールオフ弁のポートの飛び出しに
よる事故の発生を未然に防止することができる。また、
雨水や塵埃の侵入を防止できるとともに、異常事態の発
生したシールオフ弁の肉眼による識別の容易化をも実現
することができる。Since the seal-off valve safety cap of the present invention is configured as described above, it is possible to prevent an accident due to the pop-out of the port of the seal-off valve. Also,
It is possible to prevent intrusion of rainwater and dust, and also to facilitate visual identification of the seal-off valve in which an abnormal situation has occurred.
第１図はこの考案の一実施例の説明図、第２図、第３
図、第４図はその動作説明図、第５図は他の実施例の説
明図、第６図はその動作説明図、第７図および第８図は
従来例の説明図である。 ５……シールオフ弁、１０……安全キヤツプ １１……圧逃し孔、１３……フランジ部 ２０……凹溝、２１……Ｏ−リングFIG. 1 is an explanatory view of an embodiment of the present invention, FIG. 2, and FIG.
4 and 5 are explanatory views of the operation, FIG. 5 is an explanatory view of another embodiment, FIG. 6 is an explanatory view of the operation, and FIGS. 7 and 8 are explanatory views of a conventional example. 5 ... Seal-off valve, 10 ... Safety cap 11 ... Pressure relief hole, 13 ... Flange part 20 ... Recessed groove, 21 ... O-ring
Claims (1)
部が形成されたシールオフ弁に冠着する有天筒状の可撓
性シールオフ弁安全キヤツプであつて、周壁に圧逃し孔
が形成されているとともに、下端開口部の内周壁に円周
に沿つて、上記シールオフ弁のフランジ部と係合しうる
抜け止め用の凸部が形成され、上記シールオフ弁のフラ
ンジ部のつけ根に対応する内周壁の部分に円周に沿つて
弾性突条が設けられていることを特徴とするシールオフ
弁安全キヤツプ。Claim: What is claimed is: 1. A flexible seal-off valve safety cap having a cylindrical shape with a ceiling, which is attached to a seal-off valve having a flange formed along the circumference on the outer circumference of a cylindrical opening. The escape hole is formed, and along the circumference of the inner peripheral wall of the lower end opening, there is formed a protruding portion for retaining that can engage with the flange portion of the seal-off valve. A seal-off valve safety cap characterized in that an elastic ridge is provided along the circumference on the inner peripheral wall portion corresponding to the root of the portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2591189U JPH0627893Y2 (en) | 1989-03-07 | 1989-03-07 | Seal-off valve safety cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2591189U JPH0627893Y2 (en) | 1989-03-07 | 1989-03-07 | Seal-off valve safety cap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02117478U JPH02117478U (en) | 1990-09-20 |
| JPH0627893Y2 true JPH0627893Y2 (en) | 1994-07-27 |
Family
ID=31247064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2591189U Expired - Fee Related JPH0627893Y2 (en) | 1989-03-07 | 1989-03-07 | Seal-off valve safety cap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0627893Y2 (en) |
-
1989
- 1989-03-07 JP JP2591189U patent/JPH0627893Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02117478U (en) | 1990-09-20 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |