JPS5927470B2 - seismic circuit breaker - Google Patents
seismic circuit breakerInfo
- Publication number
- JPS5927470B2 JPS5927470B2 JP54096652A JP9665279A JPS5927470B2 JP S5927470 B2 JPS5927470 B2 JP S5927470B2 JP 54096652 A JP54096652 A JP 54096652A JP 9665279 A JP9665279 A JP 9665279A JP S5927470 B2 JPS5927470 B2 JP S5927470B2
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- spring
- valve
- casing
- magnetic member
- 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
Landscapes
- Safety Valves (AREA)
- Magnetically Actuated Valves (AREA)
Description
【発明の詳細な説明】
この発明は感震遮断器、特に地震等の異常振動あるいは
都市ガス等の燃料ガスの異常流出に感応して作動するも
のに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seismic circuit breaker, particularly one that operates in response to abnormal vibrations such as earthquakes or abnormal outflow of fuel gas such as city gas.
この種の感震遮断器は、従来から種々の構成のものが提
案され公知となっている。This type of seismic circuit breaker has been proposed and known in various configurations.
しかし基本的には、ケーシング内に遊動弁体を備え、感
震時あるいは異常流出時にその弁体が移動して弁孔を塞
ぎ、以後前流側の流体の圧力によって弁孔の閉塞状態を
保持するように構成されていた。However, basically, a floating valve body is provided inside the casing, and when an earthquake is felt or an abnormal outflow occurs, the valve body moves and closes the valve hole, and thereafter the valve hole is kept closed by the pressure of the fluid on the upstream side. was configured to do so.
しかしながら、このような前流側の流体圧だけによる遮
断状態は甚だ不安定な要素があり、例えば前流側の流体
の圧力が何らかの原因により一時的にせよ低下あるいは
消失すると、それによって遮断状態が一時的あるいは部
分的に解除されてしまい、そのとき後流側への漏洩が少
なからず生じてしまう。However, such a shutoff state based only on the fluid pressure on the upstream side has an extremely unstable element. For example, if the pressure of the fluid on the upstream side drops or disappears, even temporarily, for some reason, the shutoff state may become unstable. If it is temporarily or partially released, a considerable amount of leakage to the downstream side occurs.
すなわち、遮断状態が確実に保持されないという問題が
あった。That is, there was a problem in that the cut-off state was not maintained reliably.
また、従来の感震遮断器は概して、一旦作動した後の復
帰操作あるいはその復帰操作部分の構成が面倒であり、
例えばケーシングの内外を貫通するリセット操作用シャ
フトが必要であった。Additionally, in general, conventional seismic circuit breakers are troublesome to return to after they have been activated, or to configure the return operation portion.
For example, a reset operation shaft was required that penetrated the inside and outside of the casing.
このリセット操作用シャフトは、構成を複雑化し、かつ
故障原因となりやすいメカニカルシールを必要とする。This reset operation shaft complicates the configuration and requires a mechanical seal that is likely to cause failure.
この発明は、以上のような従来の問題を鑑みてなされた
もので、その目的とするところは、比較的簡単な構成で
あって、特にそのリセットのための構成をメカニカルシ
ールを使用することなく可能にし、さらに遮断時におけ
る状態が、前流側の流体圧の低下あるいは消失によって
も損なわれずに確実に俳持されるようにしだ感震遮断器
を提供することにある。This invention was made in view of the conventional problems as described above, and its purpose is to provide a relatively simple configuration, and in particular, to provide a reset configuration without using a mechanical seal. It is an object of the present invention to provide a seismic circuit breaker which can maintain the state at the time of shutoff without being impaired even by a decrease or disappearance of fluid pressure on the upstream side.
以下、この発明の好適な実施例を図面に基づいて説明す
る。Hereinafter, preferred embodiments of the present invention will be described based on the drawings.
第１図ａ ＋ ｂ ｒ Ｃｓｄはこの発明による感震遮
断器の一実施例を示す。FIG. 1 a + b r Csd shows an embodiment of a seismic circuit breaker according to the present invention.
同図に示す感震遮断器は、先ず、非磁性材料からなる円
筒状ケーシング１内に該ケーシング１の軸方向に流路２
を形成する。The seismic circuit breaker shown in the figure first includes a flow path 2 in the axial direction of the casing 1 in a cylindrical casing 1 made of a non-magnetic material.
form.
これとともに、そのケーシング１内に、磁性体からなる
遊動弁体３を少なくとも上記流路方向（矢印方向）に移
動可能に収納する弁室４と、該弁室４の後流側（図では
右側）に位置し、かつ上記弁体３によって閉塞されて上
記流路２を閉じるように形成された弁孔４ａと、上記流
路２内に上記弁体３を前流側（図では左側）に向けて弾
性付勢する第１のバネ５とを設ける。Along with this, within the casing 1, there is a valve chamber 4 that accommodates a floating valve body 3 made of a magnetic material so as to be movable at least in the direction of the flow path (in the direction of the arrow); ) and is formed to be blocked by the valve body 3 to close the flow path 2, and the valve body 3 is placed in the flow path 2 on the upstream side (left side in the figure) A first spring 5 is provided to elastically bias the first spring toward the first spring.
また、上記ケーシング１の外に、該ケーシング１の外周
囲にその前後方向に移動可能に遊嵌合する環状磁性部材
６と、該環状磁性部材６の可動範囲を上記弁孔４ａと対
応する位置Ｐ０から該ケーシング１の後流側端部Ｐ３
までの範囲に規制する１対のストンパフ、８と、上記環
状磁性部材６を前流側のストッパー７に向けて弾性付勢
する第２のバネ９とを設ける。Further, an annular magnetic member 6 is provided outside the casing 1 and is loosely fitted around the outer periphery of the casing 1 so as to be movable in the front and back direction, and the movable range of the annular magnetic member 6 is set to a position corresponding to the valve hole 4a. From P0 to the downstream end P3 of the casing 1
A pair of stone puffs 8 are provided, and a second spring 9 is provided to elastically bias the annular magnetic member 6 toward the stopper 7 on the upstream side.
さらに、上記弁体３と上記環状磁性部材６の少なくとも
一方を永久磁石とする。Further, at least one of the valve body 3 and the annular magnetic member 6 is a permanent magnet.
ここで実施例では、弁体３を軟磁性材料とする一方、環
状磁性部材６を永久磁石としている。In this embodiment, the valve body 3 is made of a soft magnetic material, and the annular magnetic member 6 is made of a permanent magnet.
そして、上記第２のバネ９により前流側に位置させられ
ている環状磁性部材６と上記弁体３との間に作用する磁
気吸引力が所定の震度よりも大きな地震の発生時に上記
弁体３を上記第１のバネ５による弾性付勢力に打ち勝っ
て上記弁孔４ａを塞ぐ位置に移動させて拘束する第１の
安定状態（第１図Ｃ）と、上記第１のバネ５による弾性
付勢力が常時は上記弁体を上記磁気吸引力に打ち勝って
上記弁孔４ａから離れた前流側に拘束する第２の安定状
態（第１図ａ）とが得られるように、上記第１のバネ５
による弾性付勢力、上記磁気吸引力、および上記第１の
安定状態が得られる第１の安定位置Ｐ１と上記第２の安
定状態が得られる第２の安定位置Ｐ２ との間隔をそれ
ぞれ設定しである。When an earthquake occurs, the magnetic attraction force acting between the annular magnetic member 6, which is positioned on the upstream side by the second spring 9, and the valve body 3 is larger than a predetermined seismic intensity. A first stable state (FIG. 1C) in which the valve 3 is moved and restrained by overcoming the elastic biasing force of the first spring 5 to a position where the valve hole 4a is closed; The first stable state (FIG. 1a) in which the force normally overcomes the magnetic attraction force and restrains the valve body on the upstream side away from the valve hole 4a is obtained. spring 5
The elastic biasing force, the magnetic attraction force, and the distance between the first stable position P1 where the first stable state is obtained and the second stable position P2 where the second stable state is obtained are set respectively. be.
以上のように構成したことにより、弁体３は、その第２
の安定位置Ｐ２にて弁孔３から離れて上記流路２を定常
的に開くが、地震動あるいは異常流出等によって該弁体
３が後流側へ若干移動駆動されてその移動量が所定のし
きい距離を越えると、第１の安定状態が優勢な圏内に入
り込んでそのまま弁孔４ａを塞ぐ第１の安定位置Ｐ１
まで移動し、そこで流路２を遮断する。With the above configuration, the valve body 3
At a stable position P2, the flow path 2 is opened steadily by moving away from the valve hole 3, but the valve body 3 is driven to move slightly to the downstream side due to earthquake motion or abnormal outflow, and the amount of movement remains unchanged. When the threshold distance is exceeded, the first stable position P1 enters the area where the first stable state is predominant and blocks the valve hole 4a.
The flow path 2 is then blocked.
ここで注目すべきことは、その遮断状態が上記環状磁性
部材６との間に作用する磁気吸引力によって保持される
ことであり、これにより仮に前流側の流体圧が低下ある
いは消失しても、その遮断状態は確実に仇持される。What should be noted here is that the blocked state is maintained by the magnetic attraction force that acts between the annular magnetic member 6 and the annular magnetic member 6, so that even if the fluid pressure on the upstream side decreases or disappears, , the cut-off state will definitely be maintained.
従って、特に都市ガスの如き燃料ガスを地震やガスホー
スの脱落等の際に緊急に遮断して安全を確保する用途に
適している。Therefore, it is particularly suitable for applications in which fuel gas such as city gas is urgently shut off to ensure safety in the event of an earthquake or a gas hose falling off.
そして、その復帰（リセット）操作は、第１図ｄに示す
ように、上記環状磁性部材６を第２のバネ９に抗して後
流側（図では右側）へ一時的に移動操作すれば、これに
より弁体３は流路２を開く元の第２の安定位置Ｐ２に自
動的に復帰することができる。The return (reset) operation is performed by temporarily moving the annular magnetic member 6 to the downstream side (to the right in the figure) against the second spring 9, as shown in FIG. 1d. , whereby the valve body 3 can automatically return to the second stable position P2 from which the flow path 2 is opened.
このときもまた注目すべきことは、上述の如き復帰操作
が例えばケーシング１の内外を貫通するリセット操作用
シャフト等によらずに、そのケーシング１の内外を完全
に隔離したままの状態でもって行なわれるということで
ある。What should also be noted at this time is that the above-mentioned return operation is performed with the inside and outside of the casing 1 completely isolated, without using, for example, a reset operation shaft passing through the inside and outside of the casing 1. This means that
これにより、構成を複雑化し、かつ漏洩の恐れがあるメ
カニカルシールを使用せずに、簡単な構成でもって復帰
のための機能を得ている。As a result, a return function is obtained with a simple configuration without using a mechanical seal that complicates the configuration and poses a risk of leakage.
なお、第２図はこの発明の他の実施例を示したもので、
前述の実施例との・相違についてだけ説明すると、上記
第１のバネ５を後流側に配置し、そのバネ５の弾性押圧
力でもって弁体３を第２の安定位置Ｐ２ に拘束させる
ようにしである。In addition, FIG. 2 shows another embodiment of this invention.
To explain only the difference from the previous embodiment, the first spring 5 is arranged on the downstream side, and the elastic pressing force of the spring 5 restrains the valve body 3 at the second stable position P2. It's Nishide.
また、弁体３は球状に形成され、これにより感震感度を
高めている。Further, the valve body 3 is formed into a spherical shape, thereby increasing the seismic sensitivity.
以上のように、この発明による感震遮断器は、その作動
時における遮断状態が前流側の流体圧の低下あるいは消
失等にかかわらず安定に保持されるとともに、そのリセ
ット機能も構成上面倒なメカニカルシールを使用せずに
簡単かつ高信頼に構成されている。As described above, the seismic circuit breaker according to the present invention maintains the shutoff state stably during operation regardless of the drop or disappearance of the fluid pressure on the upstream side, and also has a reset function that is troublesome due to its configuration. Simple and highly reliable configuration without using mechanical seals.
第１図ａ ＋ ｃ ｒ ｄはこの発明による感震遮断器
の各状態における一実施例をそれぞれ示す断面図、同図
すは同図ａのＡ−Ａ断面図、第２図は他の実施例を示す
断面図である。
１・・・ケーシング、２・・・流路、３・・・弁体、４
・・・弁室、４ａ・・・弁孔、５・・・第１のバネ、６
・・・環状磁性部材、７，８・・・ストッパー、９・・
・第２のバネ、Ｐｌ ・・第１の安定位置、Ｐ２−・
・第２の安定位置。Figure 1 a + cr d is a cross-sectional view showing one embodiment of the seismic circuit breaker according to the present invention in each state; It is a sectional view showing an example. 1...Casing, 2...Flow path, 3...Valve body, 4
... Valve chamber, 4a... Valve hole, 5... First spring, 6
... Annular magnetic member, 7, 8... Stopper, 9...
・Second spring, Pl ・・First stable position, P2−・
-Second stable position.
Claims (1)
ングの軸方向に流路を形成するとともに、該ケーシング
内に、磁性体からなる遊動弁体を少なくとも上記流路方
向に移動可能に収納する弁室と、該弁室の後流側に位置
し、かつ上記弁体によって閉塞されて上記流路を閉じる
ように形成された弁孔と、上記流路内に上記弁体を前流
側に向けて弾性付勢する第１のバネとを設け、また上記
ケーシング外に、該ケーシングの外周囲にその前後方向
て移動可能に遊嵌合する環状磁性部材と、該環状磁性部
材の可動範囲を上記弁孔と対応する位置から該ケーシン
グの後流側端部までの範囲に規制する１対のストッパー
と、上記環状磁性部材を前流側のストッパーに向けて弾
性付勢する第２のバネとを設け、さらに上記弁体と上記
環状磁性部材の少なくとも一方を永久磁石とし、上記第
２のバネにより前流側に位置させられている環状磁性部
材と上記弁体との間に作用する磁気吸引力が所定の震度
よりも大きな地震の発生時に上記弁体を上記第１のバネ
による弾性付勢力に打ち勝って上記弁孔を塞ぐ位置に移
動さ′せて拘束する第１の安定状態と、上記第１のバネ
による弾性付勢力が常時は上記弁体な上記磁気吸引力に
打ち勝って上記弁孔から離れた前流側に拘束する第２の
安定状態とが得られるように、上記第１のバネによる弾
性付勢力、上記磁気吸引力、及び上記第１の安定状態が
得られる第１の安定位置と、上記第２の安定状態が得ら
れる第２の安定位置との間隔をそれぞれ設定してなるこ
とを特徴とする感震遮断器。1. A valve chamber that forms a flow path in the axial direction of the casing in a cylindrical casing made of a non-magnetic material, and houses a floating valve body made of a magnetic material so as to be movable at least in the direction of the flow path. a valve hole located on the downstream side of the valve chamber and formed so as to be occluded by the valve body to close the flow path; an annular magnetic member that is loosely fitted to the outer periphery of the casing so as to be movable in the front and rear directions; and a first spring that is elastically biased; A pair of stoppers restricting the range from a position corresponding to the hole to a downstream end of the casing, and a second spring elastically biasing the annular magnetic member toward the upstream stopper. Further, at least one of the valve body and the annular magnetic member is a permanent magnet, and a magnetic attraction force is applied between the annular magnetic member positioned on the upstream side by the second spring and the valve body. a first stable state in which the valve body is moved and restrained by overcoming the elastic biasing force of the first spring to a position where the valve hole is closed when an earthquake larger than a predetermined seismic intensity occurs; The elastic biasing force of the first spring normally overcomes the magnetic attraction force of the valve body, and a second stable state is obtained in which the valve element is restrained on the upstream side away from the valve hole. The elastic biasing force, the magnetic attraction force, and the interval between the first stable position where the first stable state is obtained and the second stable position where the second stable state is obtained are respectively set. A seismic circuit breaker featuring
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54096652A JPS5927470B2 (en) | 1979-07-30 | 1979-07-30 | seismic circuit breaker |
| GB8024613A GB2060827B (en) | 1979-07-30 | 1980-07-28 | Fluid shut-off valve |
| IT23772/80A IT1131780B (en) | 1979-07-30 | 1980-07-29 | FLUID INTERCEPTING DEVICE |
| FR8016783A FR2462633A1 (en) | 1979-07-30 | 1980-07-30 | STOP VALVE |
| DE19803028938 DE3028938A1 (en) | 1979-07-30 | 1980-07-30 | FLUID BLOCKING DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54096652A JPS5927470B2 (en) | 1979-07-30 | 1979-07-30 | seismic circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56101470A JPS56101470A (en) | 1981-08-14 |
| JPS5927470B2 true JPS5927470B2 (en) | 1984-07-05 |
Family
ID=14170754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54096652A Expired JPS5927470B2 (en) | 1979-07-30 | 1979-07-30 | seismic circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5927470B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0226065Y2 (en) * | 1983-05-30 | 1990-07-17 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5997370A (en) * | 1982-11-25 | 1984-06-05 | Nippon Ranko Kk | Solenoid valve |
| WO2004016974A1 (en) * | 2002-08-14 | 2004-02-26 | Kunitaka Mizobe | Pressure relief valve |
| JP5465211B2 (en) * | 2011-05-23 | 2014-04-09 | リンナイ株式会社 | Gas shut-off valve and motor safety valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50128127U (en) * | 1974-04-05 | 1975-10-21 | ||
| JPS5345861Y2 (en) * | 1974-06-10 | 1978-11-02 | ||
| JPS5417237Y2 (en) * | 1974-07-22 | 1979-07-04 |
-
1979
- 1979-07-30 JP JP54096652A patent/JPS5927470B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0226065Y2 (en) * | 1983-05-30 | 1990-07-17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56101470A (en) | 1981-08-14 |
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