JPH0810714Y2 - Pressure relief valve for hot water supply facility - Google Patents
Pressure relief valve for hot water supply facilityInfo
- Publication number
- JPH0810714Y2 JPH0810714Y2 JP1992091053U JP9105392U JPH0810714Y2 JP H0810714 Y2 JPH0810714 Y2 JP H0810714Y2 JP 1992091053 U JP1992091053 U JP 1992091053U JP 9105392 U JP9105392 U JP 9105392U JP H0810714 Y2 JPH0810714 Y2 JP H0810714Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- seat
- pressure
- valve body
- 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.)
- Expired - Lifetime
Links
Landscapes
- Safety Valves (AREA)
- Diaphragms And Bellows (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、給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。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a pressure relief valve assembled in a boiler body of a hot water supply facility.
【０００２】[0002]
【従来の技術】上述の圧力逃し弁Ａは通常図１に示して
いる如く、それの弁箱１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１０と連通する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
知して上下に作動するダイヤフラム２を設け、そのダイ
ヤフラム２の下面側に弁体３を組付け支持せしめて、ダ
イヤフラム２の動きに従い弁体３が上下に動くように
し、弁箱１内の前記弁体３の下方位置に、大径の逃し口
ｂを設けて、それの口縁部に、前記弁体３の下面側に装
設する弾性資材よりなるシート３０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の上面側
には、該ダイヤフラム２を２次室ｗ側に押返すバネ５を
所望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に抗して上方に向け感知作動を行な
うことにより、弁体３が弁箱１内に固定して設けた弁座
４から上方に離れて逃し口ｂを開放する弁機構ａを構成
し、弁箱１はこの弁機構ａにより開閉制御される逃し口
ｂが大気側に連通するように形成しておくことで、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ｂが開放して、圧力水
を大気側に放出するように構成してある。2. Description of the Related Art The above-mentioned pressure relief valve A is normally connected to the upper surface side of a valve box 1 of the pressure relief valve A by a connecting pipe 10 connected to a secondary side such as a boiler can body, as shown in FIG. A secondary chamber (pressure-sensitive chamber) w is formed, and a diaphragm 2 that senses the water pressure in the secondary chamber w and operates up and down is provided therein, and the valve body 3 is assembled and supported on the lower surface side of the diaphragm 2. At the very least, the valve body 3 should be moved up and down in accordance with the movement of the diaphragm 2, and a large-diameter escape port b should be provided at a position below the valve body 3 in the valve box 1 at the edge portion thereof. An annular valve seat 4 that is detachably joined to a seat 30 made of an elastic material that is provided on the lower surface side of the valve body 3 is provided, and the diaphragm 2 is provided on the upper surface side of the diaphragm 2. The spring 5 that pushes back to the side is installed with the desired spring pressure set, and the pressure on the secondary chamber w side is set by the spring 5. When the pressure exceeds the set pressure, the diaphragm 2 acts upward against the spring 5 to perform a sensing operation, so that the valve body 3 is released upward from the valve seat 4 fixedly provided in the valve box 1. The pressure in the secondary chamber w is set by forming a valve mechanism a for opening the opening b, and forming the valve box 1 so that the relief opening b controlled to open and close by this valve mechanism a communicates with the atmosphere side. When the pressure becomes a desired pressure set by the spring pressure of the spring 5, the escape port b is opened and the pressure water is discharged to the atmosphere side.
【０００３】[0003]
【考案が解決しようとする課題】ところで、このように
構成される給湯施設用の圧力逃し弁Ａは、２次側の圧力
の増大がボイラーの破裂等の事故を起すことで、２次側
の圧力が異常に高くなったときに、それを迅速に外部に
逃すよう逃し口を大径に形成することが要求され、この
ため、逃し口を開閉させる弁機構ａも大径に形成され
る。By the way, the pressure relief valve A for a hot water supply facility constructed as above has a secondary side pressure rise due to an increase in the secondary side pressure causing an accident such as a rupture of the boiler. When the pressure becomes abnormally high, it is required to form the escape port with a large diameter so as to quickly release it to the outside. Therefore, the valve mechanism a for opening and closing the escape port is also formed with a large diameter.
【０００４】そしてこのことから、弁機構ａの可動の弁
体３を支持するダイヤフラム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、上下可動の弁体３の弾性資材よりなるシート３０
と、弁箱１内に固定して設けた環状の弁座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が、固定の弁座４に強力に押し付
けられることにより、損傷を受け、弁機能を損傷せしめ
るようになる問題がある。From this, the spring pressure of the spring 5 for pushing back the diaphragm 2 supporting the movable valve body 3 of the valve mechanism a to the side of the secondary chamber w becomes relatively large, so that the secondary chamber w
When the pressure on the side decreases, the large spring pressure of the spring 5 causes the seat 30 made of the elastic material of the vertically movable valve body 3 to move.
Then, the seat 30 made of the elastic material of the valve body 3 is strongly attached to the fixed valve seat 4 by directly contacting the joint portion with the annular valve seat 4 fixedly provided in the valve box 1. There is a problem that the pressing force causes damage and damages the valve function.
【０００５】毎平方糎当り１Ｋｇ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、タイヤフラム２は精度を向
上させるため通常６ｃｍ程度の径に形成することから、
それの受圧面積は２０〜３０ｃｍ２となり、このためバ
ネ５には２０〜３０Ｋｇ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、可動の弁体３を固定の弁座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２０〜３
０Ｋｇの強大な圧力が、可動の弁体３のシート３０と固
定の弁座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 a relief valve to be installed in a boiler of a hot water supply facility which is required to be used while being kept at a water pressure of 1 kg or less per square meter, the tire flam 2 usually has a diameter of about 6 cm in order to improve accuracy. From forming,
The pressure receiving area thereof is 20 to 30 cm 2 , and therefore, the spring 5 having a spring pressure of 20 to 30 kg is used. The pressure of the spring 5 is 2 when the pressure inside the boiler can is close to the set pressure.
By contacting the pressure receiving surface of the diaphragm 2 from the next chamber w side,
Although the pressure on the side of the secondary chamber w is substantially balanced and the pressure for pressing the movable valve body 3 against the fixed valve seat 4 is small, the hot water at the hot water tap connected to the boiler is small. As the amount of water used in the boiler becomes larger than the amount of water supplied to the boiler, when the water pressure in the boiler's can is exhausted, the pressure pushing the diaphragm 2 from the secondary chamber w side becomes extremely high. 20 to 3 per square meter mentioned above
A strong pressure of 0 kg is applied to the joint portion between the seat 30 of the movable valve body 3 and the fixed valve seat 4, and the seat 30 made of an elastic material is damaged.
【０００６】[0006]
【目的】本考案は、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側に異常な圧力が生じたと
きに、その圧力を外部に逃すのが迅速に行なわれるよ
う、逃し口および弁機構ａを大径に形成しながら、２次
室ｗ側の圧力が低下してきて、ダイヤフラム２を２次室
ｗ側に押し返す強力なバネ５のバネ圧で、可動の弁体３
に設けられた弾性資材よりなるシート３０が、弁箱１側
に設けられる環状の弁座４に押し付けられるようになっ
たときには、その強力なバネ５のバネ圧を、弾性資材よ
りなるシート３０から切り離して、その弾性資材よりな
るシート３０に生ずる変形損傷を防止するのが適確に行
なえるようにする新たな手段を提供することを目的とす
る。[Purpose] The present invention has been made to solve this problem, and when abnormal pressure occurs on the secondary chamber w side, the pressure can be quickly released to the outside. While forming the escape port and the valve mechanism a to have a large diameter, the pressure on the secondary chamber w side decreases, and the movable valve body 3 is moved by the spring pressure of the powerful spring 5 that pushes the diaphragm 2 back to the secondary chamber w side.
When the seat 30 made of the elastic material provided in the above is pressed against the annular valve seat 4 provided on the valve box 1 side, the spring pressure of the strong spring 5 is changed from the seat 30 made of the elastic material. It is an object of the present invention to provide a new means that can be accurately separated to prevent deformation and damage that may occur in the sheet 30 made of the elastic material.
【０００７】[0007]
【課題を解決するための手段】そして、本考案において
は、この目的を達成するための手段として、弁箱に設け
た２次室の圧力とその圧力に対向するバネのバネ圧とに
より上下に作動するよう弁箱に組付けたダイヤフラムの
下面側に、弁体を該ダイヤフラムと共に上下に動くよう
取付けて、その弁体の下面側に弾性資材よりなるシート
を設け、その弁体の下方に配位して大径の逃し口を弁箱
に装設し、その大径の逃し口の口縁部に、前記シートと
対向する環状の弁座を装設してなる給湯施設用の圧力逃
し弁において、弁体には、それの下面側の周縁部よりも
中心に寄る部位に、弾性資材よりなるシートを環状に設
け、弁箱には前記逃し口と通ずる上下方向の筒状部を設
けて、その筒状部内に、ボディを、水密を保持せしめて
摺動自在に嵌挿して、そのボディの上端側を、該ボディ
より拡径して四周に張出す鍔状部に形成し、該鍔状部の
上面に、前記弁体の下面側の周縁部より中心に寄る部位
に設けた環状のシートと対向さす環状の弁座を、前記逃
し口のまわりを囲うように形設し、かつ、そのボディを
それと弁箱との間に介装した弱いバネ圧のバネにより前
記弁体に向け押上げ、弁箱には筒状部の内面側に、前記
ボディの外周面に形設せる拡径部の上面に衝合して環状
の弁座の上昇作動の上限を規制する突起部ａを装設し、
前記弁体の下面側の周縁部と対向する部位に、その弁体
の周縁部の下面に衝合してその弁体の下降側の作動の下
限を規制するストッパーを装設し、かつ、そのストッパ
ーおよび前記突起部を、拡径部の上面が突起部の下面に
衝合した状態時に環状の弁座の鍔状部の下面と弁箱の筒
状部の上面との間に形成される距離が前記ストッパーの
上面と弁体の下面側の周縁部との間に形成される距離よ
り大きくなるよう配設したことを特徴とする給湯施設用
の圧力逃し弁を提起するものである。In the present invention, as means for achieving this object, the pressure of the secondary chamber provided in the valve box and the spring pressure of the spring facing the pressure are used to move up and down. The valve body is attached to the lower surface of the diaphragm assembled to the valve box so that it can move up and down together with the diaphragm, and a seat made of an elastic material is provided on the lower surface of the valve body. Pressure relief valve for a hot water supply facility, in which a large-diameter escape port is installed in the valve box, and an annular valve seat facing the seat is installed at the edge of the large-diameter escape port. In the valve body, a seat made of an elastic material is provided in an annular shape at a portion closer to the center than a peripheral portion on the lower surface side of the valve body, and a vertical tubular portion communicating with the escape port is provided in the valve box. , The body is slidably inserted in the tubular part while keeping the watertightness. The upper end side of the body is formed into a collar-shaped portion that is expanded in diameter from the body and extends in four rounds, and is provided on the upper surface of the collar-shaped portion at a position closer to the center than the peripheral edge portion on the lower surface side of the valve body. An annular valve seat which faces the annular seat and is formed so as to surround the escape port, and the body is interposed between the valve seat and the valve body by a spring having a weak spring pressure. The protrusion that pushes upwards toward the inner surface of the cylindrical portion of the valve box and abuts the upper surface of the expanded portion formed on the outer peripheral surface of the body to regulate the upper limit of the upward movement of the annular valve seat. a is installed,
A stopper, which abuts the lower surface of the peripheral edge portion of the valve element to restrict the lower limit of the operation on the descending side of the valve element, is provided at a portion facing the peripheral edge portion on the lower surface side of the valve element, and Distance formed between the lower surface of the collar-shaped portion of the annular valve seat and the upper surface of the tubular portion of the valve box when the stopper and the protrusion are in contact with the lower surface of the protrusion on the upper surface of the enlarged diameter portion. Is provided so as to be larger than the distance formed between the upper surface of the stopper and the peripheral edge portion on the lower surface side of the valve body, thereby providing a pressure relief valve for a hot water supply facility.
【０００８】[0008]
【実施例】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。Embodiments Next, embodiments will be described in detail with reference to the drawings. The same reference numerals as those used in the conventional means are used for the constituent elements having the same effect.
【０００９】図２は本考案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側への移動である下降作動の下限を規制するスト
ッパーを示している。FIG. 2 is a vertical side view of a pressure relief valve A according to the present invention. In FIG. 2, 1 is a valve box, w is a secondary chamber (pressure sensitive chamber), 2 is a diaphragm, and 3 is a diaphragm. The attached valve element 4, an annular valve seat, a a valve mechanism composed of the valve element 3 and the annular valve seat 4, b an escape opening controlled by the valve mechanism a, and 5 a diaphragm 2 A spring that presses the secondary chamber w side, c is a weak spring that pushes the valve seat 4 toward the diaphragm 2, and s is 2 of the valve body 3 attached to the diaphragm 2.
It shows a stopper that regulates the lower limit of the lowering operation that is the movement to the side of the next chamber w.
【００１０】前記弁箱１は、ボイラーの缶体などの給水
系の２次側に接続する接続管１０を具備する弁箱本体１
ａ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ｂと連通する排水管１２が装設してある。そして、前
記ダイヤフラム２は、前述の弁箱１を組立てる際に、周
縁部位をバネケース１ｂと弁箱本体１ａとの間に扶持せ
しめるこでで弁箱１に組付けてあり、また、ダイヤフラ
ム２を２次室ｗ側に押返すばネ５は、バネケース１ｂ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
節できるようにしてある。The valve box 1 includes a valve box body 1 having a connecting pipe 10 connected to a secondary side of a water supply system such as a boiler body.
A drain case 12 is provided at the bottom of the valve box main body 1a, which is connected to the escape port b, and is composed of a and a spring case 1b assembled to the upper surface side forming the secondary chamber w thereof. When the valve box 1 is assembled, the diaphragm 2 is attached to the valve box 1 by holding the peripheral edge portion between the spring case 1b and the valve box body 1a, and the diaphragm 2 is attached. The spring pressure of the flap 5 pushed back toward the secondary chamber w can be adjusted by rotating an adjusting screw 50 screwed onto the outer end of the spring case 1b.
【００１１】また、この弁箱１には、前記ダイヤフラム
２の中央部位の下方位置に、軸方向を上下方向とした筒
状部１３が形成されていて、それの上端側の開放口が前
記２次室ｗに連通し、下端側が前述の排水管１２に連通
している。Further, the valve box 1 is provided with a cylindrical portion 13 whose axial direction is a vertical direction at a position below a central portion of the diaphragm 2, and an opening on the upper end side of the cylindrical portion 13 is formed at the above-mentioned 2 It communicates with the next chamber w, and the lower end side communicates with the drainage pipe 12 described above.
【００１２】弁体３は環状の弁座４と接合する部位にゴ
ムなどの弾性材よりなるシート３０を組付ける通常のも
ので、ダイヤフラム２の中央部位の下面側に配位して止
着ねじ３１によりダイヤフラム２に組付けてある。The valve body 3 is a normal one in which a seat 30 made of an elastic material such as rubber is assembled at a portion joined to the annular valve seat 4, and is arranged on the lower surface side of the central portion of the diaphragm 2 and a fixing screw. It is attached to the diaphragm 2 by 31.
【００１３】また、この弁体３と対向さす環状の弁座４
は、前述の筒状部１３の内腔に嵌挿される筒状のボディ
４ａを弁箱本体１ａと別体に形成して、このボディ４ａ
を、前記筒状部１３内に水密を保持せしめて摺動自在に
嵌挿し、それの上端側の開放口を実質的な大径の逃し口
ｂに形成するとともに、その逃し口ｂのまわりを四周に
張り出す鍔状部４１に形成し、この鍔状部４１の上面側
に、前述の弁体の弁座４を装設するようにしてある。An annular valve seat 4 facing the valve body 3 is also provided.
Is formed by forming a tubular body 4a, which is inserted into the inner cavity of the tubular portion 13 described above, separately from the valve box body 1a.
Is inserted into the tubular portion 13 so as to be watertight and slidably fitted thereinto, and an opening port on the upper end side thereof is formed as a substantially large-diameter escape port b, and around the escape port b. The collar-shaped portion 41 is formed so as to extend over the four circumferences, and the valve seat 4 of the valve body is mounted on the upper surface side of the collar-shaped portion 41.
【００１４】そして、これにより、弁箱１側に設ける環
状の弁座４を、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てある。そして、この弁座４
の可動範囲は、前記筒状部１３に嵌合するボディ４ａの
外周面に設けた拡径部４０の上面が筒状部１３の口縁に
内面側に向けて突出するよう設けた突起部１３ａの下面
に当って上昇作動を規制された状態位置において、環状
の弁座４と一体の鍔状部４１の下面と前記筒状部１３の
上面との間に形成される距離ｙに設定されている。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ｂ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てある。As a result, the annular valve seat 4 provided on the side of the valve box 1 is assembled to the valve box 1 so as to be movable in the operating direction of the valve body 3, and the spring pressure of the spring 5 is approximately the same. 1/10
Diaphragm 2 by spring c with a weak spring pressure
It is urged to push to the side. And this valve seat 4
The movable range of the protrusion 13a is provided so that the upper surface of the expanded diameter portion 40 provided on the outer peripheral surface of the body 4a fitted into the cylindrical portion 13 protrudes toward the inner surface at the rim of the cylindrical portion 13. Is set to a distance y formed between the lower surface of the collar-shaped portion 41 integral with the annular valve seat 4 and the upper surface of the cylindrical portion 13 at a position where the lifting operation is restricted by hitting the lower surface of the tubular portion 13. There is. Also, a valve mechanism a composed of the valve seat 4 and the valve body 3 is also provided.
The relief port b controlled to be opened and closed by forming the body 4a of the valve seat 4 into a hollow shaft-cylindrical shape.
It is formed by the inner lumen of the.
【００１５】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２次
室ｗ側への動きとなる下降作動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てある。そし
て、このストッパーｓは、前述した如く、環状の弁座４
が上昇作動の上限に位置している状態において、それに
より押し上げられた弁体３の下面と該ストッパーｓの上
面との間に形成される距離ｚが、前述の距離ｙより小さ
くなるようにその位置を設定して装設してある。そし
て、これにより、２次室ｗ側の圧力の低下で弁体３が図
２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てある。When the diaphragm 2 is pushed into the secondary chamber w side by the spring pressure of the spring 5 due to the decrease of the pressure on the secondary chamber w side, the stopper s causes the secondary of the valve body 3 to be pushed. This is for restricting the lower limit of the downward movement that moves toward the chamber w side, and is formed by forming a protrusion that abuts the lower surface of the valve body 3 on the inner wall surface of the valve box body 1a. There is. Then, as described above, this stopper s is provided with the annular valve seat 4
Is located at the upper limit of the ascending operation, the distance z formed between the lower surface of the valve body 3 and the upper surface of the stopper s pushed up thereby is smaller than the above-mentioned distance y. The position is set and installed. As a result, when the valve body 3 moves downward in FIG. 2 due to the decrease in the pressure on the side of the secondary chamber w, the valve seat 4 that moves downward following the valve body 4 reaches the lower limit of the lowering operation. 3 reaches the lower limit first and becomes immovable.
【００１６】次に図３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によって開閉する逃し口ｂ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ｂをバネケース１ｂ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てある点が第２図に示した実施
例と異なるだけで、基本的には前記図２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. In this embodiment, the valve body 3 formed in a hollow shaft cylinder shape is provided with a relief opening b opened and closed by a valve mechanism a composed of a valve body 3 and a valve seat 4 assembled to a diaphragm 2. 2 is that the body 4a of the valve seat 4 is formed in a simple piston shape by communicating with the outside air through a communication port d which is formed in the inner cavity of the spring 3, and the escape port b of which is opened in the spring case 1b. The embodiment is basically the same as the embodiment shown in FIG. 2 except the embodiment shown in FIG.
【００１７】[0017]
【考案の効果】以上説明したように、本考案による給湯
施設用の圧力逃し弁は、２次室ｗ側に異常な圧力が生じ
たときには、ダイヤフラム２が上昇することで、環状の
弁座４を設けた鍔状部４１を上端側に支持するボディ４
ａの内腔に形成した大径の逃し口ｂを介して、その圧力
が迅速に外部に放出するようになり、また、２次室ｗの
圧力が低下してきたときには、弁体３の下面側の周縁部
がストッパーｓの上面に当接して、その周縁部より中心
に寄る部位に配位して弁体３の下面側に設けた弾性資材
よりなるシート３０が、ダイヤフラム２を２次室ｗ側に
押し出す強いバネ５のバネ圧から切り離されて、このシ
ート３０には、ボディ４ａを押し上げる弱いバネｃのバ
ネ圧だけで、そのボディ４ａの上端部の鍔状部４１に設
けた環状の弁座４が圧接していくようになるのだから、
２次室ｗ側に異常な圧力が生じたときに、その圧力を外
部に逃すのが迅速に行なわれるよう、逃し口ｂおよびそ
れを開閉する弁機構ａの環状の弁座４と弾性資材よりな
るシート３０を大径に形成しながら、２次室ｗ側の圧力
が低下してきたときに、弾性資材よりなるシート３０を
強力なバネ５のバネ圧で環状の弁座４に押し付けること
により生じてくるシート３０の変形・損傷を、効果的に
防止できるようになる。As described above, in the pressure relief valve for hot water supply facilities according to the present invention, when the abnormal pressure is generated on the secondary chamber w side, the diaphragm 2 is raised to cause the annular valve seat 4 to move. Body 4 for supporting the collar-shaped portion 41 provided with on the upper end side
The pressure is quickly released to the outside through the large-diameter escape port b formed in the inner cavity of a, and when the pressure of the secondary chamber w decreases, the lower surface side of the valve body 3 The seat 30 made of an elastic material provided on the lower surface side of the valve body 3 by contacting the upper edge of the stopper s with the upper surface of the stopper s, and arranging it at a position closer to the center than the outer edge of the diaphragm 2, the diaphragm 2 in the secondary chamber w. The seat 30 is separated from the spring pressure of the strong spring 5 pushed out to the side, and only the spring pressure of the weak spring c that pushes up the body 4a causes the annular valve provided in the collar-shaped portion 41 at the upper end of the body 4a. Since the seat 4 comes to come into pressure contact,
When an abnormal pressure is generated on the secondary chamber w side, the relief port b and the annular valve seat 4 and the elastic material of the valve mechanism a for opening and closing the relief mechanism are used so that the pressure is quickly released to the outside. The sheet 30 made of an elastic material is pressed against the annular valve seat 4 by the spring pressure of the strong spring 5 when the pressure on the side of the secondary chamber w decreases while forming the sheet 30 having a large diameter. The deformation and damage of the coming sheet 30 can be effectively prevented.
【図１】従前の給湯施設用の圧力逃し弁の説明図であ
る。FIG. 1 is an explanatory view of a conventional pressure relief valve for a hot water supply facility.
【図２】本考案を実施せる給湯施設用の圧力逃し弁の縦
断側面図である。FIG. 2 is a vertical sectional side view of a pressure relief valve for a hot water supply facility in which the present invention is implemented.
【図３】同上の別の実施例の縦断側面図である。FIG. 3 is a vertical sectional side view of another embodiment of the above.
Ａ…圧力逃し弁、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…突起部、２…ダイヤフラム、３…弁体、３
０…シート、３１…止着ねじ、４…弁座、４ａ…ボデ
ィ、４０…拡径部、４１…鍔状部、５…バネ、５０…調
節ねじ、ｗ…２次室、ｓ…ストッパー、ｚ…距離、ａ…
弁機構、ｂ…逃し口、ｃ…弱いバネ、ｄ…連通口、ｙ…
距離。A ... Pressure relief valve, 1 ... Valve box, 1a ... Valve box body, 1b ... Spring case, 10 ... Connection pipe, 12 ... Drain pipe, 13 ... Cylindrical part, 13a ... Projection part, 2 ... Diaphragm, 3 ... Valve body Three
0 ... Seat, 31 ... Fixing screw, 4 ... Valve seat, 4a ... Body, 40 ... Expanded portion, 41 ... Collar portion, 5 ... Spring, 50 ... Adjusting screw, w ... Secondary chamber, s ... Stopper, z ... distance, a ...
Valve mechanism, b ... escape port, c ... weak spring, d ... communication port, y ...
distance.
Claims (1)
力に対向するバネ５のバネ圧とにより上下に作動するよ
う弁箱１に組付けたダイヤフラム２の下面側に、弁体３
を該ダイヤフラム２と共に上下に動くよう取付けて、そ
の弁体３の下面側に弾性資材よりなるシート３０を設
け、その弁体３の下方に配位して大径の逃し口ｂを弁箱
１に装設し、その大径の逃し口ｂの口縁部に、前記シー
ト３０と対向する環状の弁座４を装設してなる給湯施設
用の圧力逃し弁Ａにおいて、弁体３には、それの下面側
の周縁部よりも中心に寄る部位に、弾性資材よりなるシ
ート３０を環状に設け、弁箱１には前記逃し口ｂと通ず
る上下方向の筒状部１３を設けて、その筒状部１３内
に、ボディ４ａを、水密を保持せしめて摺動自在に嵌挿
して、そのボディ４ａの上端側を、該ボディ４ａより拡
径して四周に張出す鍔状部４１に形成し、該鍔状部４１
の上面に、前記弁体３の下面側の周縁部より中心に寄る
部位に設けた環状のシート３０と対向さす環状の弁座４
を、前記逃し口ｂのまわりを囲うように形設し、かつ、
そのボディ４ａをそれと弁箱１との間に介装した弱いバ
ネ圧のバネｃにより前記弁体３に向け押上げ、弁箱１に
は筒状部１３の内面側に、前記ボディ４ａの外周面に形
設せる拡径部４０の上面に衝合して環状の弁座４の上昇
作動の上限を規制する突起部１３ａを装設し、前記弁体
３の下面側の周縁部と対向する部位に、その弁体３の周
縁部の下面に衝合してその弁体３の下降側の作動の下限
を規制するストッパーｓを装設し、かつ、そのストッパ
ーｓおよび前記突起部１３ａを、拡径部４０の上面が突
起部１３ａの下面に衝合した状態時に環状の弁座４の鍔
状部４１の下面と弁箱１の筒状部１３の上面との間に形
成される距離ｙが前記ストッパーｓの上面と弁体３の下
面側の周縁部との間に形成される距離ｚより大きくなる
よう配設したことを特徴とする給湯施設用の圧力逃し
弁。1. A valve on the lower surface side of a diaphragm 2 assembled in a valve box 1 so as to operate up and down by the pressure of a secondary chamber w provided in the valve box 1 and the spring pressure of a spring 5 opposed to the pressure. Body 3
Is mounted so as to move up and down together with the diaphragm 2, a seat 30 made of an elastic material is provided on the lower surface side of the valve body 3, and the seat 30 is arranged below the valve body 3 and the large-diameter escape port b is provided in the valve box 1. In the pressure relief valve A for a hot water supply facility, in which the annular valve seat 4 facing the seat 30 is installed at the edge portion of the large diameter escape port b, A seat 30 made of an elastic material is provided in an annular shape at a portion closer to the center than the peripheral portion on the lower surface side thereof, and the valve box 1 is provided with a vertical cylindrical portion 13 communicating with the escape port b. A body 4a is slidably fitted in the tubular portion 13 while keeping watertightness, and an upper end side of the body 4a is formed into a collar-shaped portion 41 which is expanded in diameter from the body 4a and extends four rounds. Then, the collar-shaped portion 41
An annular valve seat 4 facing the annular seat 30 provided on the upper surface of the valve body 3 at a position closer to the center than the peripheral edge portion on the lower surface side of the valve body 3.
Is formed so as to surround the escape port b, and
The body 4a is pushed up toward the valve body 3 by a spring c having a weak spring pressure interposed between the body 4a and the valve box 1, and the valve box 1 has an outer peripheral surface of the body 4a on the inner surface side of the tubular portion 13. A protrusion 13a that abuts against the upper surface of the enlarged diameter portion 40 formed on the surface and restricts the upper limit of the upward movement of the annular valve seat 4 is provided, and faces the peripheral edge portion on the lower surface side of the valve body 3. A stopper s that abuts against the lower surface of the peripheral edge of the valve body 3 and regulates the lower limit of the operation of the valve body 3 on the descending side is attached to the part, and the stopper s and the protrusion 13a are provided. The distance y formed between the lower surface of the collar-shaped portion 41 of the annular valve seat 4 and the upper surface of the tubular portion 13 of the valve box 1 when the upper surface of the expanded diameter portion 40 abuts the lower surface of the protrusion 13a. Is larger than the distance z formed between the upper surface of the stopper s and the peripheral portion of the valve body 3 on the lower surface side. Pressure relief valve for hot water supply facilities and features.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992091053U JPH0810714Y2 (en) | 1992-12-14 | 1992-12-14 | Pressure relief valve for hot water supply facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992091053U JPH0810714Y2 (en) | 1992-12-14 | 1992-12-14 | Pressure relief valve for hot water supply facility |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0564583U JPH0564583U (en) | 1993-08-27 |
| JPH0810714Y2 true JPH0810714Y2 (en) | 1996-03-29 |
Family
ID=14015769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992091053U Expired - Lifetime JPH0810714Y2 (en) | 1992-12-14 | 1992-12-14 | Pressure relief valve for hot water supply facility |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0810714Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4409133A1 (en) * | 1994-03-17 | 1995-09-21 | Bosch Gmbh Robert | Pressure control valve |
| JP2006336900A (en) * | 2005-05-31 | 2006-12-14 | Danrei:Kk | Pressure relief valve |
| JP5912523B2 (en) * | 2011-12-28 | 2016-04-27 | 日本サーモスタット株式会社 | Fluid control valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS564074U (en) * | 1979-06-22 | 1981-01-14 | ||
| JPS5884462U (en) * | 1981-12-04 | 1983-06-08 | 長瀬 秀次郎 | Structure of diaphragm-actuated relief valve |
-
1992
- 1992-12-14 JP JP1992091053U patent/JPH0810714Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0564583U (en) | 1993-08-27 |
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