JP3912534B2

JP3912534B2 - Pressure open / close valve with pressure sensor

Info

Publication number: JP3912534B2
Application number: JP2003066421A
Authority: JP
Inventors: 永島有里子
Original assignee: 永島有里子
Priority date: 2003-03-12
Filing date: 2003-03-12
Publication date: 2007-05-09
Anticipated expiration: 2023-03-12
Also published as: JP2004270905A

Description

【０００１】
【発明の属する技術分野】
本発明は温水器機等の圧力を規定以内に維持するための圧力開閉弁に属するものである。
【０００２】
【従来の技術】
【特許文献１】
特開２００１−２５４８５２号公報
【特許文献２】
実用公告Ｈ０４−０１０４４６号公報
【特許文献３】
特開２００３−２１２６１号公報
圧力開閉弁は精度、耐久性の向上等の要求により特開２００１−２５４８５２号公報、実用公告Ｈ０４−０１０４４６号公報に見るように、入口側の圧力を感知し可動する圧力応動板が予め設定された位置まで動いたときに、流路を開閉する圧力開閉弁が発明された。これらは、圧力応動板に対し弁体が動く構造であって、特開２００１−２５４８５２号公報では弁体のストッパーに当たるまで圧力応動板のみが動き、圧力応動板が弁体のストッパーに当たると、弁体は圧力応動板と一体的に動き弁体が弁座を離れ開弁する。他の例実用公告Ｈ０４−０１０４４６号公報では弁体がストッパーに当たるまで、圧力応動板と弁体は一体的に動き、弁体がストッパーに当たると弁体の動きが止まり、圧力応動板のみが動くことで弁座を弁体が離れ開弁する。従って弁に掛かる力は弁座に弁を密着させる第２附勢手段のみとなることと、開弁圧力の調整はストッパーの位置を変えることで出来ることで精度、耐久性が向上した。
【０００３】
近年温水機等の使用圧力が高圧となり、温水機の缶内圧力により開閉する圧力開閉弁の他に缶内圧力を感知し電気信号を出す圧力スイッチ（圧力センサー）を取り付け、温水機に水が満たされていることを確認し、温水機からの蒸気の発生を防止しすることが義務化され、特開２００３−２１２６１では前述の特開２００１−２５４８５２等の圧力開閉弁が、圧力により圧力応動板があらかじめ動いた後に圧力応動板に対し弁が動き開弁する構造である事に注目し、図８に示す実施例の如く圧力開閉弁の圧力応動板を圧力センサーの感圧板と兼用することで圧力開閉弁と圧力センサーの一体化を図った。
【０００４】
【発明が解決しようとする課題】
しかし温水機の場合は水が満たされていることを確認する為の圧力センサーの設定圧力は低圧であり、缶内圧力を規定圧力以下に保つ圧力開閉弁の開弁圧力は高圧であって差が大きく、何れか一方に合わせ設計すると他方の圧力設定が出来なかった。両者の圧力差が大きい温水機の様な場合であっても使用出来る圧力センサーを一体化した圧力開閉弁の開発が要望されていた。
【０００５】
【課題を解決する手段】
前述した目的を達成するために、本発明は圧力応動板を圧力に対抗して附勢する附勢手段を主附勢手段と補助附勢手段に分け、主附勢手段が高圧設定された圧力開閉弁の設定圧力近くの圧力まで圧力応動板が移動する位置まで圧力応動板を附勢しないようにして、圧力センサーの低圧設定をする圧力では補助附勢手段のみが圧力応動板を附勢するようにすることで圧力開閉弁が高圧設定であっても、圧力センサーの設定圧力を容易に低圧設定が出来るようにしたものである。
【０００６】
請求項１に記載の発明によれば入口と出口と入口と出口を連通する流路を有するハウジングと、入口側の圧力を感知し可動する圧力応動板と、圧力応動板に対して弁体又は弁座を可動可能として圧力応動板が予め設定された位置まで動いたときに前記流路を開閉する弁座と弁体と、圧力応動板を圧力に対抗して附勢する附勢手段とで構成する圧力開閉弁の圧力応動板の動きを検知して電気信号を出すセンサー又はスイッチをハウジング又はハウジングと一体的な部位に取り付けて、圧力応動板が予め設定された位置まで動いたときに、電気信号が出る圧力センサー付き圧力開閉弁において、圧力応動板を圧力に対抗して附勢する附勢手段を主附勢手段と補助附勢手段に分け、圧力開閉弁が流路を開閉する位置以内の任意の設定位置まで圧力応動板が移動するまで、主附勢手段が圧力応動板を附勢しないように主附勢手段の附勢距離を制限し、補助附勢手段だけで圧力応動板を附勢して、圧力応動板が低圧力で可動可能とし、主附勢手段が圧力応動板を附勢する設定位置以上では主附勢手段と補助附勢手段が圧力応動板を附勢し、圧力応動板が高圧力で可動して、圧力応動板が低圧力で可動する範囲で圧力センサーが稼働し、圧力応動板が高圧力で可動する範囲で圧力開閉弁が開閉するようにした圧力センサー付き圧力開閉弁であるから、圧力開閉弁の設定圧力が高圧設定であっても、圧力センサーの設定圧力を容易に低圧力に設定することが出来る。
【０００７】
請求項２に記載の発明によれば入口と出口と入口と出口を連通する流路を有し、その流路に圧力室を形成したハウジングと、その圧力室に外部に対して水密的且つ可動可能に組付けた圧力応動板と、前記圧力応動板を圧力室側に附勢する第１附勢手段と、前記圧力応動板の中央部に圧力応動板に対して水密的且つ可動可能に組付けた弁体と、出口側流路の圧力室開口口に装設した前記弁体に対向して弁体と共に流路を開閉する弁座と、前記弁体を弁座側に附勢する第２附勢手段と、圧力応動板に対する弁体の移動距離を制限するストッパーとから構成される圧力開閉弁のハウジング又はハウジングと一体的な部位又は弁軸にリードスイッチ又はホール素子等の磁気センサーを取り付け、圧力応動板又は圧力応動板と一体的に動く部位の前記磁気センサー対向位置に磁石を取り付けて、圧力応動板が予め設定した位置まで動いたときに、電気信号が出る圧力センサー付き圧力開閉弁において、第１附勢手段を主附勢手段と補助附勢手段とに分け、圧力応動板に対する弁体の移動がストッパーにより制限される距離以内の任意の設定位置まで圧力応動板が移動するまで、主附勢手段が圧力応動板を附勢しないように主附勢手段の附勢距離を制限し、補助附勢手段だけで圧力応動板を附勢して、圧力応動板が低圧力で可動可能とし、主附勢手段が圧力応動板を附勢する設定位置以上では主附勢手段と補助附勢手段が圧力応動板を附勢し、圧力応動板が高圧で可動して、圧力応動板が低圧力で可動する範囲で圧力センサーが稼働し、圧力応動板が高圧力で可動する範囲で圧力開閉弁が開閉するようにした圧力センサー付き圧力開閉弁であるから、圧力開閉弁の設定圧力が高圧設定であっても、圧力センサーの設定圧力を容易に低圧力に設定することが出来る。
【０００８】
請求項３記載の発明によれば、入口と出口と入口と出口を連通する流路を有するハウジングと、入口と出口を連通する流路に入口と出口を水密的に仕切り且つ可動可能に組み付けた圧力応動板と、前記圧力応動板を入口側に付勢する第１付勢手段と、前記圧力応動板の中央部に入口側と出口側を連通する連通孔を設け、その連通孔の入口側周囲に装設した弁座と、その弁座に入口側から対向し弁座と共に連通孔を開閉する弁体と、その弁体を前記弁座に付勢する第２付勢手段と、前記弁体の出口側への移動距離を制限するストッパーとから構成される圧力開閉弁のハウジング又はストッパー等ハウジングと一体的な部位にリードスイッチ又はホール素子等の磁気センサーを取り付け、圧力応動板又は圧力応動板と一体的に動く部位の前記磁気センサー対向位置に磁石を取り付けて、圧力応動板が予め設定した位置まで動いたときに電気信号が出る圧力センサー付き圧力開閉弁において、第１附勢手段を主附勢手段と補助附勢手段とに分け、弁体の移動がストッパーにより制限される距離以内の任意の設定位置まで圧力応動板が移動するまで、主附勢手段が圧力応動板を附勢しないように主附勢手段の附勢距離を制限し、補助附勢手段だけで圧力応動板を附勢して、圧力応動板が低圧力で可動可能とし、主附勢手段が圧力応動板を附勢する設定位置以上では主附勢手段と補助附勢手段が圧力応動板を附勢し、圧力応動板が高圧で可動して、圧力応動板が低圧力で可動する範囲で圧力センサーが稼働し、圧力応動板が高圧力で可動する範囲で圧力開閉弁が開閉するようにした圧力センサー付き圧力開閉弁であるから、圧力開閉弁の設定圧力が高圧設定であっても圧力センサーの設定圧力を容易に低圧力に設定することが出来る。
【０００９】
【発明の実施の形態】
発明の実施の形態を実施例に基づき図面を参照して説明する。図１は本発明の一実施例である。ハウジング１の入口２と出口３とを連通する流路に圧力室６を形成し、その圧力室６に外部に対して水密的に圧力応動板であるダイアフラム４をバネケース１７により組付ける。ダイアフラム４には通常の作動部である第１作動部１６と第１作動部１６の中心側に第１作動部１６内側ダイアフラム（以降受圧部と表記）１５に対して弁部１９を水密に可動可能にする第２作動部１８を設け、第２作動部１８のセンターに弁部１９をその弁部１９とバネ受け座２０でダイアフラム４を挟持するように軸５により水密的に取り付ける。受圧部１５上面側に、中心部位に前記バネ受け座２０と対向するバネ座２１を設けそのセンターに穴２２を穿った支持金具１２を、その支持金具１２のセンターの穴２２に前記軸５を摺動可能に貫通させ、前記バネ受け座２０とバネ座２１との間に第２附勢手段である弁バネ１０を附勢した状態で組み付け、上方より軸５にストッパー１１を取り付けることで弁部１９の受圧部１５に対する移動距離を制限し、そして支持金具１２とバネケース１７に取り付けられた蓋２４の間に補助附勢手段である補助バネ９を附勢する。
【００１０】
主附勢手段である主バネ２５は図２に示すように第一吊金具２６と第二吊金具２７との間に附勢し、第一吊金具２６のスライド溝２８に第二吊金具２７の爪２９を上下動可能に嵌め爪２９がスライド溝２８の下辺で止められることで附勢距離を制限し、蓋２４と補助バネ９の間に第一吊金具２６の鍔３０を挟むことでハウジング１に組み付けられ、支持金具１２が上昇し支持金具１２が第二吊金具２７に当接し、爪２９がスライド溝２８の下辺を離れ、主バネ２５が支持金具１２を介して受圧部１５を附勢する。
【００１１】
弁部１９には下面側に弾性体で成る弁体７を一体的に形成し、ハウジング１には出口３と圧力室６を連通する連通路の圧力室6の開口口に前記弁体７に対向して弁体７と共に連通路を開閉する弁座８を形成する。受圧部１５下面側に対向するハウジング１の位置には下限ストッパー２３を形成し、受圧部１５の必要以上の下降を止めダイアフラムに無理な力が加わらないようにする。下限ストッパー２３は補助バネ９が弱くダイアフラムに無理が係らないような場合には省略する場合もある。
【００１２】
そしてバネケース１７の外側面にリードスイッチ３１を取り付け、支持金具１２の前記リードスイッチ３１と対向する位置には磁石３２を取り付け、支持金具１２が設定位置まで上昇したときに、磁石３２をリードスイッチ３１が感知して電気信号を出すようにする。
【００１３】
蓋２４のセンターに穴２２を穿ち軸５を貫通させて、軸５に取り付けた取手３３は手動開閉をする為の物で無くても何ら支障ない。又第一吊金具２６と第二吊金具２７により主バネ２５の附勢距離を制限したが、主バネ２５の自由長を設計により附勢距離の制限長さに出来れば第一吊金具２６、第二吊金具２７を省略し主バネ２５を直に組み込んででも差し使いない。その場合は支持金具１２の上面にバネ座を設けて主バネ２５を組み付けると良い。
【００１４】
圧力の設定は、まず電気信号を出力する圧力をリードスイッチ３１の位置を調節するか蓋２４を調節して補助バネ９の力を変化させて設定し、次ぎに開弁圧力の設定をストッパー１１の位置を調節して設定すれば各々個別に設定できる。
【００１５】
前述のように構成された圧力スイッチ付き圧力開閉弁の作動を図面により説明する。図１は無圧力時の図、図３は低圧力時で磁石３２をリードスイッチ３１が感知して電気信号を出力した図であり、図４は高圧力となり弁体７が弁座８を離れ開弁した図である。
【００１６】
図１０の如く本発明の圧力センサー付き圧力開閉弁５０の入口２を給湯機５１の給湯管５４を分岐して接続し、出口３に排水管５３を接続し出口３からの排水を排水溝に排水するようにして、リードスイッチ31を給湯機５１の制御器にコード５７で電気的に接続する。給湯機５１に減圧弁５２を介して給水すると給湯機５１の缶体内圧力が上昇し圧力室６の圧力が上昇して、受圧部１５が補助バネ９に対抗して押し上げられる。第２作動部１８の動きで弁部１９は弁バネ１０により附勢され弁座８に圧接した閉弁状態を維持する。受圧部１５が上昇しリードスイッチ３１が磁石３２を感知するとリードスイッチ３１が給湯機５１の制御器に電気信号を出し給湯機を運転可能状態にする。水圧が規定以下の場合、リードスイッチ３１が磁石３２を感知するまで受圧部１５が上昇しないのでリードスイッチ３１が電気信号を出さず給湯機５１の制御器は給湯機５１を運転不可として給水圧異常ランプの点灯又はブザーを鳴らして給湯器５１の異常運転を防止する。
【００１７】
給湯機の缶内圧力がさらに上昇すると支持金具１２が第二吊金具２７に当たり主附勢手段である主バネ２５が支持金具１２を介して受圧部１５を附勢し、受圧部１５は主バネ２５と補助バネ９に対抗して上昇し、支持金具１２がストッパー１１に当たると弁部１９と一体となり上昇して、弁体７を弁座８から引き離して図４の如く開弁して缶内圧力を出口3に排出して缶内圧力を設定値以下に保つように作動する。常態の缶内圧力は減圧弁５２により支持金具１２がストパー１１に当たる圧力より低い圧力に保たれている。
【００１８】
他の実施例を図を参照に説明する。図５はその一実施例である。入口２と入口２に連なる圧力室６を有するハウジング１′と出口３を有するハウジング１″とでハウジング１′の圧力室６上端面に入口２と出口３を水密に仕切る圧力応動板であるダイアフラム４を外部に対して水密に挟持して取り付ける。ダイアフラム４の中心部に入口２と出口３を連通する連通孔３５を有する弁金具３４を上部より支持金具１２でダイアフラム４を挟持し水密に取り付けして、その弁金具３４の連通孔３５入口側に連通孔３５を囲む弁座８を形設する。その弁座８に入口側から対向する弁体７を組み付け、弁体７に一体的に取り付けられた軸５を連通孔３５を通して弁金具３４の上側に突き出す。弁体７を弁座８に密着させるように第２附勢手段である弁バネ１０を弁金具３４と軸５に支持した止め輪３６の間に附勢する。
【００１９】
そしてダイアフラム４の上部に取り付けた支持金具１２とハウジング１″に取り付けた蓋２４の間に図２の様にした主附勢手段である主バネ２５と補助附勢手段である補助バネ９を前述の実施例と同様に附勢する。ハウジング１″に取り付けた蓋２４の軸５と対向する位置にストッパー１１を組み付けて弁体７の上方への動きを制限する。ハウジング１″の外壁にはリードスイッチ３１を取り付け、支持金具１２の前記リードスイッチ３１対向位置に磁石３２を取り付ける。
【００２０】
前述のように構成した圧力スイッチ付き圧力開閉弁の作動を図面により説明する。図５は無圧力時の図、図６は低圧力時で磁石３２をリードスイッチ３１が感知して電気信号を出力した図であり、図７は高圧力時の弁体７が弁座８を離れ開弁した図である。
【００２１】
入口２から水圧が加えられると、ダイアフラム４が補助バネ９に対抗して上方に押し上げられる。弁部１９は弁バネ１０により、弁座８に附勢されているので、閉弁状態を維持しダイアフラム４と一体的に動く。ダイアフラム４の上昇に伴い、図６の如く支持金具１２に取り付けられた磁石３２が上昇すると、リードスイッチ３１が感知し電気信号を出力する。
【００２２】
さらに圧力が上昇しダイアフラム４が上方に押し上げられると弁金具３４が第二吊金具２７に当たり主バネ２５がダイアフラム４を附勢する様になる。さらに圧力が上昇するとダイアフラム４は補助バネ９と主バネ２５に対抗して上昇して、軸５がストッパー１１に当り弁部１９は上昇できなくなりダイアフラム４のみが上昇して弁座８が弁体７を離れ開弁し、圧力を出口３に開放する図７となる。圧力の調整等については前述の例と同じである。
【００２３】
さらに他の実施例を図９に示す。この実施例はリードスイッチ３１をストッパー１１に内蔵し、軸５の上端に磁石３２を取り付けるか、軸の上端又は軸全体を磁性化して磁石３２としてリードスイッチ３１と磁石３２とを同一軸線上として対向し易くした物であり、その他は前述の例と同じである。この場合の圧力の調整は開弁圧力をストッパー１１により調節した後、ストッパー１１に内蔵するリードスイッチ３１を上下し調節して電気信号を出す圧力を調整しリードスイッチ３１を止め板５６で固定する。而してハウジング１″に対して蓋２４を動かすことがないので蓋２４とハウジング１″を一体化できる。この例ではリードスイッチ３１をストッパー１１に内蔵したが、リードスイッチ３１、磁石３２の一方をハウジングと一体的な部位に取り付け、他方をダイアフラムと一体的に動く部位に取り付ければよい。
【００２４】
【発明の効果】
以上説明したように、発明によれば圧力応動板であるダイアフラムを圧力に対抗して附勢する附勢手段を主バネと補助バネとに分け、開弁圧力以内の任意の設定位置までは、附勢力の弱い補助バネのみがダイアフラムを附勢しているのであるから、ダイアフラムは低圧力で動くこととなり、低圧力を検出することが出来ると共に任意の設定位置以上においては、ダイアフラムに補助バネと主バネが附勢されるのでダイアフラムは補助バネと主バネの附勢力に対抗する高圧力で動く事となり高圧力を検出できる。従ってダイアフラムの低圧力検知範囲の動きを検知して電気信号を出力し圧力センサーとし、高圧力検知範囲の動きにより弁を開閉し圧力開閉弁とする圧力センサー付き開閉弁とすれば電気信号を出力する圧力と弁を開閉する圧力の差が大きい場合でも何ら支障無く低圧力、高圧力共に高い精度で圧力設定できるので、圧力開閉弁のダイアフラムを水圧確認用圧力スイッチの感圧板として兼用し圧力開閉弁と水圧確認用圧力スイッチを一体化した高圧用給湯機の圧力センサー付き圧力開閉弁として使用でき、圧力開閉弁と圧力スイッチとを一体にした装置となり取り付けが簡単で安価な圧力スイッチ一体の高圧給湯機用圧力センサー付き圧力開閉弁が提供できる。
【図面の簡単な説明】
【図１】本発明に係る圧力センサー付き圧力開閉弁の一実施例の無圧力時の縦断面図
【図２】主バネの附勢距離を規制する実施例の縦断面図
【図３】上記実施例の低圧力時の縦断面図
【図４】上記実施例の高圧力時開弁状態の縦断面図
【図５】本発明に係る圧力センサー付き圧力開閉弁の他の実施例の無圧力時の縦断面図
【図６】上記実施例の低圧力時の縦断面図
【図７】上記実施例の高圧力時開弁状態の縦断面図
【図８】従来の圧力センサー付き圧力開閉弁の無圧力時の縦断面図
【図９】本発明に係る圧力センサー付き圧力開閉弁の他の実施例の無圧力時に於ける縦断面図
【図１０】本発明に係る圧力センサー付き圧力開閉弁を給湯器に取り付けた実施例を示す図
【符号の説明】
１−ハウジング２−入口３−出口
４−ダイアフラム５−軸６−圧力室
７−弁体８−弁座９−補助バネ
１１−ストッパー１７−バネケース２５−主バネ
２６−第一吊金具２７−第二吊金具３１−リードスイッチ
３２−磁石５６−止め板[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to a pressure on-off valve for maintaining the pressure of a water heater or the like within a specified range.
[0002]
[Prior art]
[Patent Document 1]
JP 2001-254852 A [Patent Document 2]
Utility Notice H04-010446 [Patent Document 3]
As disclosed in Japanese Patent Application Laid-Open No. 2001-254852 and Utility Publication H04-010446, the pressure on-off valve is movable by sensing the pressure on the inlet side in response to demands for improvement in accuracy and durability. A pressure on-off valve has been invented that opens and closes the flow path when the pressure responsive plate moves to a preset position. These are structures in which the valve body moves relative to the pressure responsive plate. In Japanese Patent Laid-Open No. 2001-254852, only the pressure responsive plate moves until it hits the stopper of the valve body, and when the pressure responsive plate hits the stopper of the valve body, The body moves integrally with the pressure responsive plate, and the valve body leaves the valve seat and opens. In another example, the public notice H04-010446 discloses that the pressure responsive plate and the valve body move integrally until the valve body hits the stopper, and when the valve body hits the stopper, the movement of the valve body stops and only the pressure responsive plate moves. Then the valve body leaves the valve seat and opens. Accordingly, the force applied to the valve is only the second urging means for bringing the valve into close contact with the valve seat, and the valve opening pressure can be adjusted by changing the position of the stopper, thereby improving accuracy and durability.
[0003]
In recent years, the operating pressure of water heaters has increased, and in addition to the pressure on / off valve that opens and closes by the pressure in the can of the water heater, a pressure switch (pressure sensor) that senses the pressure in the can and outputs an electrical signal is installed. It is obliged to confirm that it is satisfied and prevent the generation of steam from the water heater. In Japanese Patent Laid-Open No. 2003-21261, the pressure on / off valve described in Japanese Patent Laid-Open No. 2001-254852 is pressure-responsive by pressure. Paying attention to the structure that the valve moves and opens with respect to the pressure responsive plate after the plate has moved in advance, the pressure responsive plate of the pressure on-off valve is also used as the pressure sensitive plate of the pressure sensor as in the embodiment shown in FIG. Therefore, the pressure on-off valve and pressure sensor were integrated.
[0004]
[Problems to be solved by the invention]
However, in the case of a water heater, the set pressure of the pressure sensor for confirming that the water is filled is low, and the opening pressure of the pressure on / off valve that keeps the pressure inside the can below the specified pressure is high. The pressure of the other could not be set if it was designed to match either one. There has been a demand for the development of a pressure on-off valve that integrates a pressure sensor that can be used even in the case of a water heater with a large pressure difference between the two.
[0005]
[Means for solving the problems]
In order to achieve the above-mentioned object, the present invention divides the urging means for urging the pressure responsive plate against the pressure into a main urging means and an auxiliary urging means, and the main urging means is a pressure set at a high pressure. Do not energize the pressure responsive plate to the position where the pressure responsive plate moves to a pressure close to the set pressure of the on-off valve, and only the auxiliary urging means urges the pressure responsive plate at the pressure that sets the low pressure of the pressure sensor. By doing so, even if the pressure on-off valve is set to high pressure, the set pressure of the pressure sensor can be easily set to low pressure.
[0006]
According to the first aspect of the present invention, a housing having an inlet, an outlet, a flow path communicating the inlet and the outlet, a pressure responsive plate that senses and moves the pressure on the inlet side, and a valve element or A valve seat that opens and closes the flow path when the pressure responsive plate moves to a preset position with the valve seat movable, a valve body, and an urging means that urges the pressure responsive plate against pressure When a sensor or switch that detects the movement of the pressure responsive plate of the pressure opening / closing valve and outputs an electric signal is attached to the housing or a part integral with the housing, and the pressure responsive plate moves to a preset position, In a pressure on / off valve with a pressure sensor that outputs an electrical signal, the urging means for urging the pressure responsive plate against the pressure is divided into a main urging means and an auxiliary urging means, and the position at which the pressure on / off valve opens and closes the flow path To any set position within Until the plate moves, the biasing distance of the main biasing means is limited so that the main biasing means does not bias the pressure sensitive plate, and the pressure sensitive plate is biased only by the auxiliary biasing means. Is movable at a low pressure, the main urging means and the auxiliary urging means urge the pressure responsive plate above the set position where the main urging means urges the pressure responsive plate, and the pressure responsive plate is movable at a high pressure. Since the pressure sensor operates in the range where the pressure responsive plate can move at low pressure, and the pressure on / off valve has a pressure sensor that opens and closes in the range where the pressure responsive plate moves at high pressure, Even if the set pressure of the pressure on / off valve is a high pressure setting, the set pressure of the pressure sensor can be easily set to a low pressure.
[0007]
According to the second aspect of the present invention, the housing having a flow path communicating with the inlet, the outlet, and the inlet and the outlet, the pressure chamber being formed in the flow path, and the pressure chamber being watertight and movable with respect to the outside. A pressure responsive plate assembled as possible, a first urging means for urging the pressure responsive plate toward the pressure chamber, and a central portion of the pressure responsive plate that is watertight and movable with respect to the pressure responsive plate. The attached valve body, a valve seat that opens and closes the flow path together with the valve body facing the valve body installed in the pressure chamber opening of the outlet-side flow path, and a second valve that biases the valve body toward the valve seat side. 2 biasing means and, magnetism such as a reed switch or a Hall element integral parts or valve shaft and the housing or housing constructed pressure off valve and a stopper for limiting the movement distance of the valve body against the pressure responsive plate Attach a sensor, and the magnet of the part that moves together with the pressure responsive plate or the pressure responsive plate In a pressure on / off valve with a pressure sensor that outputs an electrical signal when a magnet is attached to the sensor facing position and the pressure responsive plate moves to a preset position, the first energizing means and the auxiliary energizing means In order to prevent the main urging means from urging the pressure responsive plate until the pressure responsive plate moves to an arbitrary set position within the distance limited by the stopper. Setting position where the biasing distance of the biasing means is limited, the pressure responsive plate is urged only by the auxiliary urging means, the pressure responsive plate is movable at low pressure, and the main urging means urges the pressure responsive plate In the above, the main urging means and the auxiliary urging means urge the pressure responsive plate, the pressure responsive plate is movable at high pressure, the pressure sensor is operated within the range where the pressure responsive plate is movable at low pressure, and the pressure responsive plate The pressure on / off valve opens and closes within the range that can move at high pressure It was because the pressure sensor with the pressure switch valve to set the pressure of the pressure off valve be pressure settings, it is possible to set the set pressure of the pressure sensor to facilitate low pressure.
[0008]
According to the third aspect of the present invention, the housing having the inlet, the outlet, and the channel that communicates the inlet and the outlet, and the inlet and the outlet are watertightly partitioned and movably assembled to the channel that communicates the inlet and the outlet. A pressure responsive plate, first urging means for urging the pressure responsive plate toward the inlet side, and a communication hole that communicates the inlet side and the outlet side at the center of the pressure responsive plate, the inlet side of the communication hole A valve seat installed in the periphery, a valve body facing the valve seat from the inlet side and opening and closing the communication hole together with the valve seat; a second urging means for urging the valve body toward the valve seat; and the valve A magnetic sensor such as a reed switch or hall element is attached to a part integrated with the housing of the pressure on-off valve or the housing, such as a stopper, which is composed of a stopper that limits the travel distance to the body outlet side, and a pressure responsive plate or pressure responsive The magnetism of the part that moves integrally with the plate In a pressure on / off valve with a pressure sensor that outputs an electrical signal when a pressure responsive plate moves to a preset position by attaching a magnet to the sensor facing position, the first urging means is a main urging means and an auxiliary urging means. The main urging means is energized so that the main urging means does not urge the pressure responsive plate until the pressure responsive plate moves to an arbitrary set position within the distance limited by the stopper. distance to restrict, by energizing the pressure responsive plate only auxiliary biasing means, the pressure responsive plate is a movably at low pressure, on the setting position ring is set to other than the main biasing means is energized the pressure responsive plate Shufu The biasing means and the auxiliary biasing means bias the pressure responsive plate, the pressure responsive plate is movable at high pressure, the pressure sensor is operated within the range where the pressure responsive plate is movable at low pressure, and the pressure responsive plate is at high pressure. Pressure sensor that opens and closes the pressure on / off valve within the movable range Attached because the pressure switch valve can be set pressure of the pressure switch valve is set to facilitate low pressure set pressure of the pressure sensor even in a high-pressure setting.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the invention will be described based on examples with reference to the drawings. FIG. 1 shows an embodiment of the present invention. A pressure chamber 6 is formed in a flow path that connects the inlet 2 and the outlet 3 of the housing 1, and a diaphragm 4 that is a pressure responsive plate is assembled to the pressure chamber 6 in a watertight manner to the outside by a spring case 17. In the diaphragm 4, the valve portion 19 is movable in a watertight manner with respect to the first operating portion 16 inner diaphragm (hereinafter referred to as a pressure receiving portion) 15 on the center side of the first operating portion 16 and the first operating portion 16 which are normal operating portions. A second actuating portion 18 is provided, and the valve portion 19 is attached to the center of the second actuating portion 18 in a watertight manner by the shaft 5 so that the diaphragm 4 is sandwiched between the valve portion 19 and the spring seat 20. On the upper surface side of the pressure receiving portion 15, a spring seat 21 opposite to the spring seat 20 is provided at the center, and the support fitting 12 having a hole 22 in the center thereof is provided. The shaft 5 is provided in the center hole 22 of the support fitting 12. The valve spring 10 is slidably penetrated and assembled in a state where the valve spring 10 as the second urging means is urged between the spring receiving seat 20 and the spring seat 21, and the stopper 11 is attached to the shaft 5 from above. The movement distance of the portion 19 relative to the pressure receiving portion 15 is limited, and the auxiliary spring 9 as auxiliary urging means is urged between the support fitting 12 and the lid 24 attached to the spring case 17.
[0010]
As shown in FIG. 2 , the main spring 25 as the main biasing means is biased between the first hanging bracket 26 and the second hanging bracket 27, and the second hanging bracket 27 is inserted into the slide groove 28 of the first hanging bracket 26. by pawl 29 fitted with a pawl 29 to be vertically movable it is possible to restrict the energizing distance by being stopped at the lower side of the slide groove 28, to sandwich the flange 30 of the first hanging metal fitting 26 between the lid 24 auxiliary spring 9 The support fitting 12 is assembled to the housing 1, the support fitting 12 is brought into contact with the second suspension fitting 27, the claw 29 leaves the lower side of the slide groove 28, and the main spring 25 moves the pressure receiving portion 15 through the support fitting 12. Energize.
[0011]
A valve body 7 made of an elastic body is integrally formed on the lower surface side of the valve portion 19, and the housing 1 is connected to the valve body 7 at the opening of the pressure chamber 6 of the communication passage communicating the outlet 3 and the pressure chamber 6. A valve seat 8 that opens and closes the communication path together with the valve body 7 is formed. A lower limit stopper 23 is formed at the position of the housing 1 facing the lower surface side of the pressure receiving portion 15 to prevent the pressure receiving portion 15 from being lowered more than necessary to prevent excessive force from being applied to the diaphragm. The lower limit stopper 23 may be omitted when the auxiliary spring 9 is weak and the diaphragm is not overwhelmed.
[0012]
A reed switch 31 is attached to the outer surface of the spring case 17, a magnet 32 is attached to a position of the support fitting 12 facing the reed switch 31, and when the support fitting 12 is raised to a set position, the magnet 32 is connected to the reed switch 31. Senses and outputs an electrical signal.
[0013]
There is no problem even if the handle 33 attached to the shaft 5 by making the hole 22 through the center of the lid 24 and penetrating the shaft 5 is not a thing for manual opening and closing. Further, the urging distance of the main spring 25 is limited by the first suspending metal fitting 26 and the second suspending metal fitting 27, but if the free length of the main spring 25 can be set to the restricted length of the urging distance by design, Even if the second spring fitting 27 is omitted and the main spring 25 is directly assembled, it is not possible to use it. In that case, it is preferable to assemble the main spring 25 by providing a spring seat on the upper surface of the support fitting 12.
[0014]
The pressure is set first by adjusting the position of the reed switch 31 or adjusting the lid 24 to change the force of the auxiliary spring 9 and then setting the valve opening pressure to the stopper 11. If you adjust the position, you can set each individually.
[0015]
The operation of the pressure switch with pressure switch constructed as described above will be described with reference to the drawings. FIG. 1 is a view when there is no pressure, FIG. 3 is a view where the reed switch 31 senses the magnet 32 and outputs an electric signal when the pressure is low, and FIG. 4 shows a high pressure and the valve body 7 leaves the valve seat 8. It is the figure which opened the valve.
[0016]
As shown in FIG. 10, the inlet 2 of the pressure on / off valve 50 with the pressure sensor of the present invention is connected by branching the hot water supply pipe 54 of the water heater 51, the drain pipe 53 is connected to the outlet 3, and the waste water from the outlet 3 is drained into the drainage groove. The reed switch 31 is electrically connected to the controller of the water heater 51 with a cord 57 so as to drain. When water is supplied to the water heater 51 via the pressure reducing valve 52, the pressure inside the can of the water heater 51 rises, the pressure in the pressure chamber 6 rises, and the pressure receiving portion 15 is pushed up against the auxiliary spring 9. Due to the movement of the second actuating portion 18, the valve portion 19 is maintained in a closed state in which it is urged by the valve spring 10 and pressed against the valve seat 8. When the pressure receiving unit 15 rises and the reed switch 31 senses the magnet 32, the reed switch 31 outputs an electric signal to the controller of the hot water heater 51 to make the hot water heater operable. When the water pressure is less than the specified value, the pressure receiving unit 15 does not rise until the reed switch 31 senses the magnet 32. Therefore, the reed switch 31 does not output an electrical signal, and the controller of the water heater 51 makes the water heater 51 inoperable and the water supply pressure is abnormal. An abnormal operation of the water heater 51 is prevented by lighting a lamp or sounding a buzzer.
[0017]
When the pressure in the can of the water heater further rises, the support fitting 12 hits the second suspension fitting 27 and the main spring 25 as the main urging means urges the pressure receiving portion 15 via the support fitting 12, and the pressure receiving portion 15 is the main spring. 25 and the auxiliary spring 9 are raised against each other, and when the support fitting 12 comes into contact with the stopper 11, it rises together with the valve part 19, pulls the valve body 7 away from the valve seat 8 and opens the valve as shown in FIG. It operates to discharge the pressure to the outlet 3 and keep the pressure inside the can below the set value. The normal pressure inside the can is maintained at a pressure lower than the pressure at which the support fitting 12 hits the stopper 11 by the pressure reducing valve 52.
[0018]
Another embodiment will be described with reference to the drawings. FIG. 5 shows an example. A diaphragm which is a pressure responsive plate for watertightly partitioning the inlet 2 and the outlet 3 at the upper end surface of the pressure chamber 6 of the housing 1 ′ by the housing 1 ′ having the inlet 2 and the pressure chamber 6 connected to the inlet 2 and the housing 1 ″ having the outlet 3. 4 is attached in a watertight manner to the outside 4. A valve fitting 34 having a communication hole 35 for communicating the inlet 2 and the outlet 3 in the center of the diaphragm 4 is attached from the top to the diaphragm 4 with the support fitting 12 and attached in a watertight manner. Then, the valve seat 8 surrounding the communication hole 35 is formed on the inlet side of the communication hole 35 of the valve fitting 34. The valve body 7 facing the valve seat 8 from the inlet side is assembled and integrated with the valve body 7. The attached shaft 5 protrudes to the upper side of the valve fitting 34 through the communication hole 35. The valve spring 10 as the second urging means is supported by the valve fitting 34 and the shaft 5 so that the valve body 7 is in close contact with the valve seat 8. Energize between retaining rings 36 .
[0019]
The main spring 25 as the main urging means and the auxiliary spring 9 as the auxiliary urging means as shown in FIG. 2 are provided between the support fitting 12 attached to the upper part of the diaphragm 4 and the lid 24 attached to the housing 1 ″. The stopper 11 is assembled at a position facing the shaft 5 of the lid 24 attached to the housing 1 ″ to limit the upward movement of the valve body 7. A reed switch 31 is attached to the outer wall of the housing 1 ″, and a magnet 32 is attached to the support fitting 12 at a position facing the reed switch 31.
[0020]
The operation of the pressure switch with pressure switch configured as described above will be described with reference to the drawings. FIG. 5 is a view when no pressure is applied, FIG. 6 is a view where the reed switch 31 senses the magnet 32 and outputs an electric signal when the pressure is low, and FIG. It is the figure which opened and opened.
[0021]
When water pressure is applied from the inlet 2, the diaphragm 4 is pushed upward against the auxiliary spring 9. Since the valve portion 19 is urged to the valve seat 8 by the valve spring 10, the valve portion 19 is maintained in a closed state and moves integrally with the diaphragm 4. When the magnet 32 attached to the support fitting 12 as shown in FIG. 6 rises as the diaphragm 4 rises, the reed switch 31 senses and outputs an electrical signal.
[0022]
When the pressure further rises and the diaphragm 4 is pushed upward, the valve fitting 34 comes into contact with the second suspension fitting 27 and the main spring 25 biases the diaphragm 4. When the pressure further rises, the diaphragm 4 rises against the auxiliary spring 9 and the main spring 25, the shaft 5 hits the stopper 11, the valve part 19 cannot rise, and only the diaphragm 4 rises, and the valve seat 8 moves to the valve body. 7 is opened and the pressure is released to the outlet 3 as shown in FIG. The pressure adjustment and the like are the same as in the above example.
[0023]
Yet another embodiment is shown in FIG. In this embodiment, the reed switch 31 is built in the stopper 11, and a magnet 32 is attached to the upper end of the shaft 5, or the upper end of the shaft or the entire shaft is magnetized to make the reed switch 31 and the magnet 32 on the same axis. It is the thing which made it easy to oppose, and others are the same as the above-mentioned example. In this case, the pressure is adjusted by adjusting the valve opening pressure with the stopper 11 and then adjusting the reed switch 31 built in the stopper 11 up and down to adjust the pressure at which an electric signal is output and fixing the reed switch 31 with the stop plate 56. . Thus, since the lid 24 is not moved with respect to the housing 1 ″, the lid 24 and the housing 1 ″ can be integrated. In this example, the reed switch 31 is built in the stopper 11, but one of the reed switch 31 and the magnet 32 may be attached to a part integrated with the housing, and the other may be attached to a part moving integrally with the diaphragm.
[0024]
【The invention's effect】
As described above, according to the invention, the urging means for urging the diaphragm which is the pressure responsive plate against the pressure is divided into the main spring and the auxiliary spring, and up to an arbitrary set position within the valve opening pressure, Since only the auxiliary spring having a weak urging force urges the diaphragm, the diaphragm moves at a low pressure, so that the low pressure can be detected, and the auxiliary spring is attached to the diaphragm at an arbitrary set position or more. Since the main spring is energized, the diaphragm moves at a high pressure against the energizing force of the auxiliary spring and the main spring, and the high pressure can be detected. Therefore, if the movement of the low pressure detection range of the diaphragm is detected and an electric signal is output to make a pressure sensor, the valve is opened and closed by the movement of the high pressure detection range and the pressure open / close valve is used to output an electric signal. Even if there is a large difference between the pressure to open and close the valve, the pressure can be set with high accuracy for both low and high pressures without any problem, so the pressure switch valve diaphragm can also be used as a pressure sensing plate for the water pressure check pressure switch. Can be used as a pressure on / off valve with a pressure sensor for a high-pressure water heater that integrates a valve and a pressure switch for water pressure confirmation, and the pressure on / off valve and pressure switch are integrated into a device that is easy to install and inexpensive. A pressure open / close valve with a pressure sensor for a hot water heater can be provided.
[Brief description of the drawings]
FIG. 1 is a vertical cross-sectional view of an embodiment of a pressure open / close valve with a pressure sensor according to the present invention when no pressure is applied. FIG. 2 is a vertical cross-sectional view of an embodiment that regulates a biasing distance of a main spring. FIG. 4 is a vertical cross-sectional view of the above-described embodiment when the valve is opened at high pressure. FIG. 5 is a pressure-less valve with a pressure sensor according to another embodiment of the present invention. FIG. 6 is a longitudinal sectional view of the above embodiment at low pressure. FIG. 7 is a longitudinal sectional view of the above embodiment when the valve is opened at high pressure. FIG. 8 is a conventional pressure open / close valve with a pressure sensor. FIG. 9 is a longitudinal sectional view of another embodiment of the pressure open / close valve with a pressure sensor according to the present invention when no pressure is applied. FIG. 10 is a pressure open / close valve with a pressure sensor according to the present invention. The figure which shows the Example which attached to the water heater 【Explanation of symbols】
1-housing 2-inlet 3-outlet 4-diaphragm 5-shaft 6-pressure chamber 7-valve body 8-valve seat 9-auxiliary spring 11-stopper 17-spring case 25-main spring 26-first hanging bracket 27-first Two hanging brackets 31-Reed switch 32-Magnet 56-Stop plate

Claims

A housing having a flow path communicating with an inlet, an outlet, and the inlet, the outlet, a pressure responsive plate that senses and moves the pressure on the inlet side, and a pressure responsive plate that can move a valve body or a valve seat with respect to the pressure responsive plate A pressure responsive plate of a pressure on / off valve comprising a valve seat and a valve body that opens and closes the flow path when moved to a preset position, and an urging means that urges the pressure responsive plate against pressure. A pressure on-off valve with a pressure sensor that outputs an electrical signal when a sensor or switch that detects motion and outputs an electrical signal is attached to the housing or an integral part of the housing and the pressure responsive plate moves to a preset position. , The urging means for urging the pressure responsive plate against the pressure is divided into a main urging means and an auxiliary urging means, and the pressure responsive plate is moved to an arbitrary set position within the position where the pressure on-off valve opens and closes the flow path. Until the move Restricts the energizing distance of the main energizing means so that the pressure actuating plate is not energized, energizes the pressure actuating plate only by the auxiliary energizing means, so that the pressure actuating plate can be moved at low pressure. Above the set position where the urging means urges the pressure responsive plate, the main urging means and the auxiliary urging means urge the pressure responsive plate, the pressure responsive plate is movable at high pressure, and the pressure responsive plate is at low pressure. A pressure on / off valve with a pressure sensor in which the pressure sensor operates within the movable range, and the pressure on / off valve opens and closes within the range where the pressure responsive plate moves at high pressure.

A housing having an inlet, an outlet, and a flow path communicating with the inlet and the outlet, in which a pressure chamber is formed, and a pressure responsive plate assembled in the pressure chamber so as to be watertight and movable with respect to the outside; A first urging means for urging the pressure responsive plate toward the pressure chamber; a valve body assembled in a central portion of the pressure responsive plate so as to be watertight and movable with respect to the pressure responsive plate; A valve seat that opens and closes the flow path together with the valve body, the second urging means that urges the valve body toward the valve seat, and a pressure responsive plate. attaching a magnetic sensor such as a reed switch or a Hall element in the housing or the housing and integral part or the valve stem of the formed pressure-off valve and a stopper for limiting the movement distance of the valve body against the pressure responsive plate or pressure-responsive A magnet is placed at the position facing the magnetic sensor at the part that moves integrally with the plate. Attached to, when the pressure responsive plate has moved to a position set in advance, in the pressure sensor with the pressure off valve electrical signal exits divides the first biasing means and the main biasing means and the auxiliary biasing means, the pressure responsive The energizing distance of the main energizing means so that the main energizing means does not energize the pressure actuating plate until the pressure actuating plate moves to an arbitrary set position within the distance limited by the stopper. The pressure urging plate is urged only by the auxiliary urging means, the pressure responsive plate is movable at a low pressure, and the main urging means is above the set position where the main urging means urges the pressure responsive plate. The auxiliary biasing means urges the pressure responsive plate, the pressure responsive plate moves at high pressure, the pressure sensor operates within the range where the pressure responsive plate moves at low pressure, and the pressure responsive plate moves at high pressure. With pressure sensor that opens and closes the pressure on / off valve Pressure opening and closing valve.

A housing having a passage communicating the inlet and the outlet, the inlet and the outlet, a pressure responsive plate in which the inlet and the outlet are watertightly partitioned and movably assembled to the flow path communicating the inlet and the outlet, and the pressure responsive plate. A first urging means for urging the inlet side, a communication hole for communicating the inlet side and the outlet side in the central portion of the pressure responsive plate, and a valve seat installed around the inlet side of the communication hole; A valve body that faces the valve seat from the inlet side and opens and closes the communication hole together with the valve seat, a second urging means that urges the valve body to the valve seat, and a movement distance of the valve body to the outlet side is limited A magnetic sensor such as a reed switch or a hall element is attached to a part integrated with the housing of the pressure on-off valve or the stopper or the like constituted by a stopper, and the magnetic of the part that moves integrally with the pressure responsive plate or the pressure responsive plate. Remove the magnet at the sensor facing position. Only, in the pressure sensor with the pressure off valve electrical signal comes when moved to a position where the pressure responsive plate is set in advance, divided into a first biasing means and the main biasing means and the auxiliary biasing means, the valve body Until the pressure responsive plate moves to an arbitrary set position within the distance limited by the stopper, the urging distance of the main urging device is limited so that the main urging device does not urge the pressure responsive plate. The pressure responsive plate is urged only by the urging means so that the pressure responsive plate can move at a low pressure, and the main urging means and the auxiliary urging means are above the set position where the main urging means urges the pressure responsive plate. Energizes the pressure responsive plate, the pressure responsive plate is movable at high pressure, the pressure sensor is operated in the range where the pressure responsive plate is movable at low pressure, and the pressure open / close valve is in the range where the pressure responsive plate is movable at high pressure A pressure on / off valve with a pressure sensor that opens and closes.