JPS62177378A - Pressure relief valve - Google Patents
Pressure relief valveInfo
- Publication number
- JPS62177378A JPS62177378A JP1887686A JP1887686A JPS62177378A JP S62177378 A JPS62177378 A JP S62177378A JP 1887686 A JP1887686 A JP 1887686A JP 1887686 A JP1887686 A JP 1887686A JP S62177378 A JPS62177378 A JP S62177378A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- valve body
- seat
- spring
- 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.)
- Pending
Links
- 239000013013 elastic material Substances 0.000 claims description 15
- 230000007423 decrease Effects 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000000470 constituent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Safety Valves (AREA)
- Diaphragms And Bellows (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ｋＡ湯施設のボイラーの缶体などに組付ける
圧力逃し弁についての改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in pressure relief valves that are assembled into the can bodies of boilers in kA hot water facilities.
ヒ述の圧力逃し弁Ａは通常第１図に示している如く、そ
れの弁箱ｌの上面側に、ボイラーの缶体などの２次側に
接続する接続管１ｏと連通ずる２次室（感圧室）Ｗを形
成して、そこにその２次室Ｗ内の水圧を感知して作動す
るダイヤフラム２を設け、そのダイヤフラム２の内面側
に弁体３を組付は支持せしめ、その弁体３と対向する位
置に、その弁体３に装着する弾性資材よりなるシート３
０に対し離接自在に接合する環状の弁座４を装設し、ダ
イヤフラム２の外側には、該ダイヤフラム２を２次室Ｗ
側に押返すバネ５を所９のバネ圧に設定して装設し、２
次室Ｗ側の圧力が前記バネ５により設定した設定圧力以
上になることでダイヤフラム２がバネ５に抗して感知作
動を行なうことにより弁体３が弁座４から離れて開放す
る弁機構ａを構成し、弁箱ｌにはこの弁機構ａにより開
閉制御される逃し口すを大気側に連通させて形設するこ
とで、２次室Ｗ内の圧力が前記バネ５のバネ圧により設
定される所望の圧力となることにより逃し口すが開放し
て、圧力水を大気側に放水するように構成しである。As shown in FIG. 1, the pressure relief valve A mentioned above is usually provided with a secondary chamber ( A pressure-sensitive chamber) W is formed, and a diaphragm 2 that operates by sensing the water pressure in the secondary chamber W is provided therein, and a valve body 3 is assembled and supported on the inner surface of the diaphragm 2, and the valve A sheet 3 made of an elastic material is attached to the valve body 3 at a position facing the body 3.
An annular valve seat 4 is installed on the outside of the diaphragm 2, and the diaphragm 2 is connected to the secondary chamber W.
A spring 5 that pushes back to the side is set to a spring pressure of 9, and is installed.
Valve mechanism a in which when the pressure on the next chamber W side exceeds the set pressure set by the spring 5, the diaphragm 2 performs a sensing operation against the spring 5, and the valve body 3 separates from the valve seat 4 and opens. The pressure in the secondary chamber W is set by the spring pressure of the spring 5 by forming a relief port in the valve box l so as to communicate with the atmosphere side and which is controlled to open and close by the valve mechanism a. When the desired pressure is reached, the relief port opens and the pressurized water is discharged to the atmosphere.
ところで、このように構成される圧力逃し弁Ａには、ダ
イヤフラム２を２次室Ｗ側に押返すバネ５のバネ圧が比
較的大きくなることから、２次室Ｗ側の圧力が低下した
ときに、このバネ５の大きなバネ圧が、弁体３の弾性資
材よりなるシート３０と環状の弁座４との接合部位にそ
のままかかるようになることで、弁体３の弾性資材より
なるシート３０を傷め、弁機能を損傷せしめるようにな
る問題がある。By the way, in the pressure relief valve A configured in this way, the spring pressure of the spring 5 that pushes back the diaphragm 2 toward the secondary chamber W side is relatively large, so that when the pressure on the secondary chamber W side decreases, In addition, the large spring pressure of the spring 5 is directly applied to the joint portion between the seat 30 made of an elastic material of the valve body 3 and the annular valve seat 4, so that the seat 30 made of the elastic material of the valve body 3 is There are problems that can damage the valve and damage the valve function.
毎平方糎当り１１以下の水圧に保持しての使用が義務づ
けられている給湯施設のボイラーに組付ける逃し弁につ
いていえば、ダイヤフラム２は精度を向トさせるため通
常６ｃｖ＋＋程度の径に形成することから、それの受圧
面積は２０〜３０ｃＪとなりこのためバネ５には２０〜
３０〜のバネ圧のものが使用されることになる。このバ
ネ５の圧力はボイラーの缶体内の圧力が設定圧力に近い
圧力であるときには、その圧力が２次室Ｗ側からダイヤ
フラム２の受圧面にかかることで、この２次室Ｗ側の圧
力と略バランスされた状態となって、弁体３を弁座４に
押付ける圧力は僅かなものとなるが、ボイラーに接続す
る給湯栓での湯の使用量がボイラーに供給される給水量
よりも多くなった場合のように、ボイラーの缶体内の水
圧がなくなると、それに伴ない２次室Ｗ側からダイヤフ
ラム２を押出している圧力が極端に低下し、前述した毎
平方糎当り２０〜３Ｑ’ｓの強大な圧力が、弁体３のシ
ート３０と弁座４との接合部位にもろにかかってくるこ
とになって、弾性資材よりなるシート３０を傷めるよう
になる。Regarding relief valves installed in boilers of water supply facilities that are required to be used at a water pressure of 11 or less per square meter, the diaphragm 2 should normally be formed to a diameter of about 6cv++ to improve accuracy. Therefore, the pressure receiving area of the spring 5 is 20 to 30 cJ.
A spring pressure of 30~ will be used. When the pressure inside the boiler body is close to the set pressure, the pressure of this spring 5 is applied from the secondary chamber W side to the pressure receiving surface of the diaphragm 2, and the pressure on the secondary chamber W side is increased. The state is almost balanced, and the pressure that presses the valve body 3 against the valve seat 4 is small, but the amount of hot water used at the hot water tap connected to the boiler is greater than the amount of water supplied to the boiler. When the water pressure inside the boiler body disappears, as in the case where the water pressure increases, the pressure pushing out the diaphragm 2 from the secondary chamber W side decreases extremely, and the above-mentioned 20 to 3Q' per square The enormous pressure of s is applied to the joining area between the seat 30 of the valve body 3 and the valve seat 4, and the seat 30 made of an elastic material is damaged.
大発明は、この問題を解消せしめるためになされたもの
であって、２次室Ｗ側の圧力が低下してきても、ダイヤ
フラム２を２次室Ｗ側に押返すバネ５のバネ圧で弁体３
のシー）３０を傷めることのないようにする新たな手段
を提供することを目的とする。The great invention was made to solve this problem, and even if the pressure on the secondary chamber W side decreases, the valve body 3
The purpose is to provide a new means to prevent damage to the C.30.
そして１本発明においては、この目的を達成するための
手段として、２次室の圧力を感知して作動するダイヤフ
ラムに弁体を取付け、その弁体に設ける弾性資材よりな
るシートと対向する環状の弁座を弁箱に装設し、その環
状の弁座に対する前記弁体の離接により開閉制御される
逃し口を弁箱に装設してなる圧力逃し弁において、前記
環状の弁座を前述弁体の作動方向に移動自在に弁箱に組
付けて１弱いバネ圧のバネにより前記弁体に向け押出し
、前述弁体の閉塞側への可動範囲を前記弁座の可動範囲
より狭く規制するストッパーを弁箱に装設してなる圧力
逃し弁を提起するものである次に実施例を図面に従い詳
述する。なお図面符号は同効の構成部材については従前
手段と同一の符号を用いるものとする。In the present invention, as a means to achieve this object, a valve body is attached to a diaphragm that operates by sensing the pressure in the secondary chamber, and an annular seat facing a sheet made of an elastic material provided on the valve body is provided. A pressure relief valve in which a valve seat is installed in a valve box, and a relief port is installed in the valve box that is controlled to open and close by moving the valve body into and out of contact with the annular valve seat, wherein the annular valve seat is It is assembled to the valve box so as to be movable in the operating direction of the valve body, and is pushed toward the valve body by a spring with a weak spring pressure, so that the range of movement of the valve body toward the closing side is restricted to be narrower than the range of movement of the valve seat. Next, an embodiment will be described in detail with reference to the drawings, which proposes a pressure relief valve in which a stopper is installed in a valve box. Note that the same reference numerals in the drawings as in the previous means are used for components having the same effect.
第２図は本発明を実施せる圧力逃し弁Ａの縦断した側面
図で、同図において、１は弁箱、Ｗは２次室（感圧室）
、２はダイヤフラム、３はダイヤフラムに取付けた弁体
、４は環状の弁座、ａは前記弁体３と環状の弁座４とで
構成される弁機構、ｂは弁機構ａにより開閉制御される
逃し口、５はダイヤフラム２を２次室Ｗ側に押圧するバ
ネ、Ｃは弁座４をダイヤフラム２に向け押出す弱いバネ
Ｓはダイヤフラム２に取付けた弁体３の２次室Ｗ側への
可動範囲を規制するストッパーを示している。Fig. 2 is a longitudinal side view of a pressure relief valve A in which the present invention can be implemented, in which 1 is a valve box and W is a secondary chamber (pressure sensitive chamber).
, 2 is a diaphragm, 3 is a valve body attached to the diaphragm, 4 is an annular valve seat, a is a valve mechanism composed of the valve body 3 and an annular valve seat 4, and b is controlled to open and close by the valve mechanism a. 5 is a spring that presses the diaphragm 2 toward the secondary chamber W, and C is a weak spring S that pushes the valve seat 4 toward the diaphragm 2 toward the secondary chamber W side of the valve body 3 attached to the diaphragm 2. It shows a stopper that restricts the range of movement of the
前記弁箱ｌは、ボイラーの缶体などの給水系の二次側に
接続する接続管ｌＯを具備する弁箱本体１ａとそれの２
次室Ｗを形成した上面側に組付けられるバネケース１ｂ
とよりなり、弁箱本体１ａの底部には逃し口すと連通ず
る排水管１２が装設しである。そして、前記ダイヤフラ
ム２は、前述の弁箱ｌを組立てる際に１周縁部位をバネ
ケース１ｂと弁箱本体１ａとの間に挟持せしめることで
弁箱ｌに組付けてあり、また、ダイヤフラム２を２次室
Ｗ側に押返すバネ５は、バネケースｌｂの外端部に螺合
せる調節ねじ５０の回動によりバネ圧が調節できるよう
にしである。The valve box l includes a valve box main body 1a having a connecting pipe lO connected to the secondary side of a water supply system such as a boiler can body, and its two parts.
Spring case 1b assembled on the upper surface side forming the next chamber W
Therefore, a drain pipe 12 is installed at the bottom of the valve box main body 1a and communicates with the outlet. The diaphragm 2 is assembled to the valve box l by sandwiching one peripheral edge portion between the spring case 1b and the valve box main body 1a when assembling the valve box l, and the diaphragm 2 is The spring pressure of the spring 5 that pushes back toward the next chamber W can be adjusted by rotating an adjustment screw 50 screwed into the outer end of the spring case lb.
弁体３は環状の弁座４と接合する部位にゴムな。The valve body 3 is made of rubber at the part where it joins with the annular valve seat 4.
どの弾性資材よりなるシー）３０を組付ける通常のもの
で、ダイヤフラム２の中央部位の内面側に配位してＩＥ
着ねじ３１によりダイヤフラム２に組付けである。It is a normal type for assembling a sheath (made of any elastic material) 30, and is arranged on the inner surface side of the central part of the diaphragm 2.
It is assembled to the diaphragm 2 using a set screw 31.
また、この弁体３と対向さす環状の弁座４は、それのボ
ディ４ａを、弁箱本体１ａと別体に形成して、弁箱本体
１ａに軸方向を前記弁体３の作動方向に沿わせて装設せ
る筒状部１３の内腔に摺動自在に嵌挿することで、弁体
３の作動方向に可動に弁箱１に組付けてあり、かつ、前
述のバネ５のバネ圧の略１０分の１程度の弱いバネ圧に
したバネＣによってダイヤフラム２側に押出すよう付勢
せしめである。そして、この弁座４の可動範囲ｙは、前
記筒状部１３に嵌合するボディ４ａのピストン状部４０
が筒状部１３の口縁に設けた突出部１３ａに当ってヒ昇
作動を規制された位置から、ボディ４ａの上部の鍔状部
４１の下面が前記筒状部１３の口縁の−Ｆ面に当って下
降作動を規制される位置までの範囲に規制されている。Further, the annular valve seat 4 facing the valve body 3 has a body 4a formed separately from the valve body body 1a, and has an axial direction aligned with the valve body body 1a in the operating direction of the valve body 3. By being slidably inserted into the inner cavity of the cylindrical part 13 installed along the valve body 1, it is assembled to the valve body 1 so as to be movable in the operating direction of the valve body 3, and the spring of the spring 5 described above It is urged to be pushed toward the diaphragm 2 side by a spring C with a weak spring pressure of about one-tenth of the pressure. The movable range y of the valve seat 4 corresponds to the piston-shaped portion 40 of the body 4a that fits into the cylindrical portion 13.
The lower surface of the flange 41 on the upper part of the body 4a touches the protrusion 13a provided on the rim of the cylindrical portion 13, and from the position where the lifting operation is restricted, the lower surface of the flange 41 at the top of the body 4a reaches The range is limited to the point where it hits the surface and the downward movement is restricted.
そしてまた、該弁座４と前記弁体３とで構成される弁機
構ａによって開閉制御される逃し口すは、該弁座４のボ
ディ４ａを中空の軸筒状に形成することで、そのボディ
４ａの内腔により形成しである。Furthermore, the relief port which is opened and closed by the valve mechanism a composed of the valve seat 4 and the valve body 3 can be formed by forming the body 4a of the valve seat 4 into a hollow cylindrical shape. It is formed by the inner cavity of the body 4a.
前記ストッパーＳは、２次室Ｗ側の圧力の低下でダイヤ
フラム２がバネ５のバネ圧で２次室Ｗ側に押込まれるよ
うになったとき、それによる弁体３の動きの下限を規制
するためのものであり、弁箱本体１ａの内壁面に、前記
弁体３の下面と衝合する突部を形設することで構成しで
あるが、このストッパーＳは、ダイヤフラム２がバラン
スされている状態からの弁体３の２次室Ｗ側への可動範
囲２を、前記弁座４の可動範囲ｙより狭くする位置に設
けてあり、これにより、２次室Ｗ側の圧力の低下で弁体
３が第２図において下方に動くとき、それに追従して下
方に動く弁座４が下降作動の下限に達する前に、該弁体
３が先に下限に達して動かない状態となるようにしであ
る。The stopper S regulates the lower limit of the movement of the valve body 3 when the diaphragm 2 is pushed into the secondary chamber W side by the spring pressure of the spring 5 due to a decrease in the pressure on the secondary chamber W side. This stopper S is constructed by forming a protrusion on the inner wall surface of the valve body body 1a that abuts the lower surface of the valve body 3. The movable range 2 of the valve body 3 toward the secondary chamber W from the state of When the valve body 3 moves downward in FIG. 2, before the valve seat 4, which moves downward following it, reaches the lower limit of the downward movement, the valve body 3 reaches the lower limit first and becomes stationary. That's how it is.
次に第３図は別の実施例を示している。この実施例は、
ダイヤフラム２に組付けた弁体３と弁座４とで構成する
弁機構ａによって開閉する志し口すを、弁体３を中空の
軸筒状に形成することでその弁体３の内腔に形成し、そ
の逃し口すをバネケースｌｂに開設せる連通口ｄを介し
て外気に連通して、弁座４のボディ４ａを単なるピスト
ン状に形成しである点が第２図に示した実施例と異なる
だけで、基本的には前記第２図の実施例と変わりないの
で、同じ構成部材については同一の符号を付して詳しい
説明は省略する。Next, FIG. 3 shows another embodiment. This example is
By forming the valve body 3 into a hollow cylindrical shape, the inner cavity of the valve body 3 is opened and closed by the valve mechanism a composed of the valve body 3 and the valve seat 4 assembled to the diaphragm 2. The embodiment shown in FIG. 2 is characterized in that the body 4a of the valve seat 4 is formed into a simple piston shape, and the relief port is communicated with the outside air through a communication port d provided in the spring case lb. Since this embodiment is basically the same as the embodiment shown in FIG. 2, except for the differences from the example, the same constituent members will be given the same reference numerals and detailed explanations will be omitted.
次に第４図は、逃し弁Ａと減圧弁Ｂとを一体に組合わせ
た減圧・逃し弁に適用した実施例の縦断正面図を示１．
ている。この実施例は、前述の第３図に示した実施例手
段の応用例であって、可動に弁箱ｌに組付ける環状の弁
座４のボディ４ａを、減圧弁Ｂの弁体６を組付ける弁杆
６０の一ヒ部に装着することで、弁座４のボディ４ａに
設けるピストン部４０が減圧弁Ｂの弁杆６０に設けるバ
ランス弁６１に利用され、また、弁座４を逃し弁Ａの弁
体３に向け押出す弱いバネＣが、減圧弁Ｂの弁体６を減
圧弁Ｂの弁座６２に向け押し出すよう付勢する減圧弁用
のバネ６３に兼用されているが、基本的には第３図の実
施例と変わりなく、同じ構−成部材については同一の符
号を付して詳しい説明は省略する。Next, FIG. 4 shows a longitudinal sectional front view of an embodiment applied to a pressure reduction/relief valve that combines relief valve A and pressure reduction valve B.
ing. This embodiment is an application example of the embodiment means shown in FIG. By attaching it to a part of the valve stem 60, the piston part 40 provided on the body 4a of the valve seat 4 can be used as a balance valve 61 provided on the valve stem 60 of the pressure reducing valve B, and the valve seat 4 can also be used as a relief valve. The weak spring C that pushes out the valve body 3 of A is also used as the pressure reducing valve spring 63 that urges the valve body 6 of pressure reducing valve B to push out the valve seat 62 of pressure reducing valve B. Generally speaking, this embodiment is the same as the embodiment shown in FIG. 3, and the same constituent members are given the same reference numerals and detailed explanations will be omitted.
なお、同図において、ｅは弁箱本体１ａに組込んだ逆止
弁、ｆは真空破かい弁、１４は一次側とのＰａ続管、１
５は二次側との接続管である。また、７はバネケース１
ｂの外周に被せた排水キャップで、弁箱ｌに対しダイヤ
フラム２の軸心線を中心として自在に旋回するよう組付
けてあり、減圧・逃し弁を取付は施工する際の弁箱１の
姿勢に応じ、該排水キャップ７を旋回させることで該排
水キヤ・Ｉプ７に装設しである排水管７０の方向が自由
に変更できるようにしである。In addition, in the same figure, e is a check valve built into the valve body body 1a, f is a vacuum rupture valve, 14 is a Pa connection pipe with the primary side, 1
5 is a connecting pipe with the secondary side. Also, 7 is spring case 1
It is a drain cap placed over the outer circumference of the valve body 1, and is attached to the valve body 1 so that it can freely rotate around the axis of the diaphragm 2.The position of the valve body 1 when installing and constructing the pressure reduction/relief valve is By rotating the drain cap 7 according to the situation, the direction of the drain pipe 70 installed in the drain cap 7 can be freely changed.
しかして、この実施例装置は、２次室Ｗ内が所定の圧力
に保持されているときは、第５図に示している如く、ダ
イヤフラム２がバランスされた位置にあり、給湯栓側の
湯の使用量がボイラーの缶体に対する一次水の給水量よ
り多くなって減圧弁Ｂが全開したとき、また、弁箱ｌに
組付ける前の製品単独の２火室Ｗの圧力が零の場合のと
きには、強力なバネ５のバネ圧で弁体３が押込まれるが
、第６図に示している如く、弁座４が可動範囲にある間
にストッパーＳに接当することで、このバネ５のバネ圧
を殺し、弁体３のシー）３０に対し弁座４が当接する圧
力を弱い減圧用のバネ６３のバネ圧（通常、バネ５のバ
ネ圧の１０分の１程度）だけにして、シート３０の損傷
を防ぐようになる。Therefore, in this embodiment, when the inside of the secondary chamber W is maintained at a predetermined pressure, the diaphragm 2 is in a balanced position as shown in FIG. When the amount of water used is greater than the amount of primary water supplied to the boiler body and the pressure reducing valve B is fully opened, or when the pressure in the second firebox W of the product alone before assembly to the valve box L is zero. Sometimes, the valve body 3 is pushed in by the spring pressure of the strong spring 5, but as shown in FIG. The pressure of the valve seat 4 in contact with the valve body 3 (see) 30 is reduced to only the weak spring pressure of the pressure reducing spring 63 (usually about 1/10 of the spring pressure of the spring 5). , this will prevent damage to the sheet 30.
次に第７図はさらに異なる実施例を示している。この実
施例は、弁体３のダイヤフラム２側への可動範囲を規制
するストー／パーＳが、弁体３には当接しないで、その
弁体３を取付けているダイヤフラム２の下面に当接する
ようになっている外は、前記第４図乃至第６図に示した
実施例と変わりなく、同じ構成部材については同一の符
号を付して説明は省絡する。そして、この実施例は、前
記第５図及び第６図の作用の説明図にある通りの作用を
変わりなく奏するようになる。Next, FIG. 7 shows a further different embodiment. In this embodiment, the stopper S that restricts the movable range of the valve body 3 toward the diaphragm 2 side does not come into contact with the valve body 3, but comes into contact with the lower surface of the diaphragm 2 to which the valve body 3 is attached. Other than this, this embodiment is the same as the embodiment shown in FIGS. 4 to 6, and the same constituent members are designated by the same reference numerals and their explanation will be omitted. In this embodiment, the same operation as shown in the explanatory diagrams of FIGS. 5 and 6 can be performed without any change.
以り説明したように、本発明による圧力逃し弁は、２次
室の圧力を感知して作動するダイヤプラムに弁体を取付
け、その弁体に設ける弾性資材よりなるシートと対向す
る環状の弁座を弁箱に装設し、その環状の弁座に対する
前記弁体の離接により開閉制御される逃し口を弁箱に装
設してなる圧力逃し弁において、前記環状の弁座を前述
弁体の作動方向に移動自在に弁箱に組付けて、弱いバネ
圧の、＜ネにより前記弁体に向け押出し、前述弁体の閉
塞側への可動範囲を前記弁座の可動範囲より狭く規制す
るストンパーを弁箱に装設した構成としであるので、２
次室側の圧力の低下でダイヤフラムに設けた弁体が環状
の弁座に対しダイヤプラムをそれの外側から押込む強力
なバネのバネ圧で押込まれるようになったとき、その強
いバネのバネ圧をストンパーで殺して、弁体に装設する
弾性資材よりなるシート弁座とが、弱いバネのバネ圧で
衝合するようになるから、前記弁体に設ける弾性資材よ
りなるシートの傷みを効果的に防１卜するようになる。As explained above, the pressure relief valve according to the present invention includes a valve body attached to a diaphragm that operates by sensing the pressure in a secondary chamber, and an annular valve facing a seat made of an elastic material provided on the valve body. A pressure relief valve in which a seat is installed in a valve box and a relief port is installed in the valve box that is controlled to open and close by moving the valve body into and out of contact with the annular valve seat, wherein the annular valve seat is connected to the valve body. The valve body is assembled to the valve box so as to be movable in the operating direction of the valve body, and is pushed toward the valve body by a weak spring pressure, so that the range of movement of the valve body toward the closing side is restricted to be narrower than the range of movement of the valve seat. Since the stomper is installed in the valve box, 2
When the pressure on the diaphragm decreases due to the pressure drop in the next chamber, the valve element mounted on the diaphragm is pushed into the annular valve seat by the spring pressure of a strong spring that pushes the diaphragm from the outside. The spring pressure is killed by the stomper, and the seat made of an elastic material mounted on the valve body comes into contact with the valve seat with the weak spring pressure, so the seat made of an elastic material provided on the valve body is damaged. This will effectively protect against.
第１図は圧力逃し弁の説明図、第２図は本発明を実施せ
る圧力逃し弁の縦断側面図、第３図は同上の別の実施例
の縦断側面図、第４図は同上の減圧・志し弁に実施した
例の縦断正面図、第５図及び第６図は同上の作用の説明
図、第７図はさらに異なる実施例の縦断正面図である。
図面符号の説明
Ａ・・・圧力逃し弁 Ｂ・・・減圧弁１・・・弁箱
１ａ・・・弁箱本体 １ｂ・・・バネケース１０・・・
接続管 １２・・・排水管１３・・・筒状部
１３ａ・・・突出部１４・・・−次側の接続管 １５
・・・二次側の接続管２・・・ダイヤフラム ３・・
・弁体３０・・・シート ３１・・・止着ねじ４
・・・弁座 ４ａ・・・ボディ４０・・・ピ
ストン状部 ４１・・・鍔状部５・・・バネ
５０・・・［ｆねじ６・・・弁体 ６０
・・・弁杆６１・・・バランス弁 ６２・・・弁座 ６
３・・・バネ７・・・排水キャップ Ｗ・・・２火室
Ｓ・・・ストッパー ２・・・可動範囲ａ・・・弁機
構 ｂ・・・逃し口 Ｃ・・・弱い／くネｄ・・・連
通口 ｅ・・・逆止弁 ｆ・・・真空破かい弁ｙ・・
・可動範囲
特 許 出 願 人 工ヌテーシー工業株式会社第１図
第 ２ 図
カ
第３図
第４図
ｎ
１ｓ５ 図
第 ６ ＠
人
６３（Ｃ’）
纂 ７ 図
手続補正書（自制
昭和６２年２月１２日
１、 事件の表示
昭和６１年特許願 第１８８７６弓
２、発明の名称 圧力逃し弁
３、補正をする者
事件との関係 出願人
５、 補正命令の日付
６、 補正により増加する発明の数
（１）、明細１り第１頁４行から末行までの特許請求の
範囲の項の記載を次の通りに補正する。
ｒ２、特許請求の範囲
２次室の圧力を感知して作動するダイヤフラムに弁体を
取付け、その弁体に設ける弾性資材よりなるシートと対
向する弁座を弁箱に装設し、その弁座に対する前記弁体
の離接により開閉制御される逃し口を弁箱に装設してな
る圧力逃し弁において、前記弁座を前述弁体の作動方向
に移動自在に弁箱に組付けて１弱いバネ圧のバネにより
前記弁体に向け押出し、前述弁体の閉塞側への可動範囲
を前記弁座の可動範囲より狭く規制するストッパーを弁
箱に装設してなる圧力逃し弁、ｊ（２）、明細書第６頁
１行から１３行までに。
［そして、本発明においては、〜提起するものである。
」とある記載を次の通りに補正する。
工 そして１本発明においては、この目的を達成するた
めの手段として、２次室の圧力を感知して作動するダイ
ヤフラムに弁体を取付け、その弁体に設ける弾性資材よ
りなるシートと対向する弁座を弁箱に装設し、その弁座
に対する前記弁体の離接により開閉制御される逃し口を
弁箱に装設してなる圧力逃し弁において、前記弁座を前
述弁体の作動方向に移動自在に弁箱に組付けて、弱いバ
ネ圧のバネにより前記弁体に向け押出し、前述弁体の閉
塞側への可動範囲を前記弁座の可動範囲より狭く規制す
るストッパーを弁箱に装設してなる圧力＆し弁を提起す
るものである。」
（３）、明細書第１５頁４行から第１６頁８行までにｒ
以上説明したように、〜効果的に防ＩＪ−，するよう
になる。」
とある記載を次のように補正する。
Ｔ 以丘説明したように、未発明による圧力逃し弁は、
２次室の圧力を感知して作動するダイヤフラムに弁体を
取付け、その弁体に設ける弾性資材よりなるシートと対
向する弁座を弁箱に装設し。
その弁座に対する前記弁体の離接により開閉制御される
逃し口を弁箱に装設してなる圧力逃し弁において、前記
弁座を前述弁体の作動方向に移動自在に弁箱に組付けて
、弱いバネ圧のバネにより前記弁体に向け押出し、前述
弁体の閉塞側への可動範囲を前記弁座の可動範囲より狭
く規制するストッパーを弁箱に装設した構成としである
ので、２次室側の圧力の低下でダイヤフラムに設けた弁
体が弁座に対しダイヤフラムをそれの外側から押込む強
力なバネのバネ圧で押込まれるようになったとき、その
強いバネのバネ圧をストッパーで殺して、弁体に装設す
る弾性資材よりなるシート弁座とが、弱いバネのバネ圧
で衝合するようになるから、前記弁体に設けるりｉ性資
材よりなるシートの傷みを効果的に防ＩＦするようにな
る。」以 上Fig. 1 is an explanatory diagram of a pressure relief valve, Fig. 2 is a vertical cross-sectional side view of a pressure relief valve that can implement the present invention, Fig. 3 is a longitudinal cross-sectional side view of another embodiment of the same as above, and Fig. 4 is a reduced pressure of the same as above. - A longitudinal sectional front view of an example implemented in a shishi valve, FIGS. 5 and 6 are explanatory diagrams of the same effect as above, and FIG. 7 is a longitudinal sectional front view of a further different embodiment. Explanation of drawing symbols A...Pressure relief valve B...Pressure reducing valve 1...Valve box
1a...Valve box body 1b...Spring case 10...
Connection pipe 12... Drain pipe 13... Cylindrical part
13a...Protruding portion 14...-Next side connecting pipe 15
...Secondary side connecting pipe 2...Diaphragm 3...
・Valve body 30... Seat 31... Set screw 4
...Valve seat 4a...Body 40...Piston-shaped part 41...Flame-shaped part 5...Spring
50...[f screw 6...valve body 60
...Valve rod 61...Balance valve 62...Valve seat 6
3...Spring 7...Drain cap W...2 Firebox S...Stopper 2...Moving range a...Valve mechanism b...Escape port C...Weak/Kune d ...Communication port e...Check valve f...Vacuum rupture valve y...
・Application for patent for movable range Human Nutcy Industry Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 n 1s5 Figure 6 @ Jin 63 (C') Draft 7 Amendment to figure procedures (self-restraint 1988 2) May 12, 1, Indication of the case 1986 Patent Application No. 18876 Bow 2, Title of the invention Pressure relief valve 3, Person making the amendment Relationship to the case Applicant 5, Date of order for amendment 6, Invention increased by the amendment Number (1), description 1, page 1, line 4 to the last line, amend the claim section as follows: r2, claim: Operates by sensing the pressure in the secondary chamber. A valve body is attached to a diaphragm, a valve seat is installed in a valve box facing a seat made of an elastic material provided on the valve body, and a relief port is controlled to open and close by moving the valve body into and out of contact with the valve seat. In a pressure relief valve installed in a box, the valve seat is assembled to the valve box so as to be movable in the operating direction of the valve body, and is pushed toward the valve body by a spring with a weak spring pressure, so that the valve seat is moved toward the valve body. A pressure relief valve comprising a stopper installed in the valve box that restricts the range of movement toward the closing side to be narrower than the range of movement of the valve seat, j(2), page 6, lines 1 to 13 of the specification. [ In the present invention, the statement ``is proposed as follows.'' is amended as follows: 1. In the present invention, as a means to achieve this object, the pressure in the secondary chamber is A valve body is attached to a diaphragm that senses and operates, a valve seat is installed in a valve box that faces a seat made of an elastic material provided on the valve body, and opening and closing are controlled by moving the valve body into and out of contact with the valve seat. In a pressure relief valve having a relief port installed in a valve box, the valve seat is assembled to the valve box so as to be movable in the operating direction of the valve body, and is pushed toward the valve body by a spring with a weak spring pressure, This invention proposes a pressure & pressure valve in which a stopper is installed in the valve box to restrict the movable range of the valve body toward the closing side to be narrower than the movable range of the valve seat.'' (3), Specification No. From page 15, line 4 to page 16, line 8, r
As explained above, IJ can be effectively prevented. ” is amended as follows. T As explained above, the uninvented pressure relief valve is
A valve body is attached to a diaphragm that operates by sensing the pressure in a secondary chamber, and a valve seat is installed in a valve box to face a seat made of an elastic material provided on the valve body. In a pressure relief valve in which a valve box is equipped with a relief port that is controlled to open and close by moving the valve body into and out of contact with the valve seat, the valve seat is assembled to the valve box so as to be movable in the operating direction of the valve body. The valve body is equipped with a stopper that is pushed toward the valve body by a spring with a weak spring pressure and restricts the range of movement of the valve body toward the closing side to be narrower than the range of movement of the valve seat. When the pressure of the strong spring that pushes the diaphragm from the outside pushes the valve element on the diaphragm against the valve seat due to a drop in the pressure on the secondary chamber side, the spring pressure of that strong spring This prevents damage to the seat made of an elastic material provided on the valve body, since the seat made of an elastic material attached to the valve body collides with the valve seat with the weak spring pressure. Effectively protects against IF. "that's all
Claims (1)
取付け、その弁体に設ける弾性資材よりなるシートと対
向する環状の弁座を弁箱に装設しその環状の弁座に対す
る前記弁体の離接により開閉制御される逃し口を弁箱に
装設してなる圧力逃し弁において、前記環状の弁座を前
述弁体の作動方向に移動自在に弁箱に組付けて、弱いバ
ネ圧のバネにより前記弁体に向け押出し、前述弁体の閉
塞側への可動範囲を前記弁座の可動範囲より狭く規制す
るストッパーを弁箱に装設してなる圧力逃し弁。A valve body is attached to a diaphragm that operates by sensing the pressure in a secondary chamber, and an annular valve seat is installed in a valve box that faces a seat made of an elastic material provided on the valve body, and the valve is connected to the annular valve seat. In a pressure relief valve in which a valve body is equipped with a relief port that is controlled to open and close by moving a body toward and away from the valve body, the annular valve seat is assembled to the valve body so as to be movable in the operating direction of the valve body, and a weak spring is used. A pressure relief valve comprising a stopper mounted on a valve box that is pushed toward the valve body by a pressure spring and restricts a movable range of the valve body toward the closing side to be narrower than a movable range of the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1887686A JPS62177378A (en) | 1986-01-30 | 1986-01-30 | Pressure relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1887686A JPS62177378A (en) | 1986-01-30 | 1986-01-30 | Pressure relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62177378A true JPS62177378A (en) | 1987-08-04 |
Family
ID=11983752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1887686A Pending JPS62177378A (en) | 1986-01-30 | 1986-01-30 | Pressure relief valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62177378A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010140190A (en) * | 2008-12-10 | 2010-06-24 | Osaka Gas Co Ltd | Valve structure for pressure adjusting valve and pressure regulation facility |
| JP2017533395A (en) * | 2014-11-05 | 2017-11-09 | ラヴァル エイ．シー．エス．リミテッドＲＡＶＡＬ Ａ．Ｃ．Ｓ．Ｌｔｄ． | Pressure relief valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3282285A (en) * | 1963-07-12 | 1966-11-01 | Bastian Blessing Co | Air line pressure regulator |
| GB1155769A (en) * | 1967-03-22 | 1969-06-18 | Martonair Ltd | Pressure Regulating Valve |
-
1986
- 1986-01-30 JP JP1887686A patent/JPS62177378A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3282285A (en) * | 1963-07-12 | 1966-11-01 | Bastian Blessing Co | Air line pressure regulator |
| GB1155769A (en) * | 1967-03-22 | 1969-06-18 | Martonair Ltd | Pressure Regulating Valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010140190A (en) * | 2008-12-10 | 2010-06-24 | Osaka Gas Co Ltd | Valve structure for pressure adjusting valve and pressure regulation facility |
| JP2017533395A (en) * | 2014-11-05 | 2017-11-09 | ラヴァル エイ．シー．エス．リミテッドＲＡＶＡＬ Ａ．Ｃ．Ｓ．Ｌｔｄ． | Pressure relief valve |
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