JP3749377B2

JP3749377B2 - Relief valve lever device

Info

Publication number: JP3749377B2
Application number: JP13146598A
Authority: JP
Inventors: 豊青山; 浩山田
Original assignee: 株式会社ヨシタケ
Priority date: 1998-04-23
Filing date: 1998-04-23
Publication date: 2006-02-22
Anticipated expiration: 2018-04-23
Also published as: JPH11304039A

Description

【０００１】
【発明の属する技術分野】
本発明は、温水用熱交換器の温水側又は給水側に設ける温水機器用の逃し弁の梃子装置に関する。
【０００２】
【従来の技術】
従来、図14、15に示す様に、この種の逃し弁ａは、弁体ｂのリフトを調節するために、弁棒ｃ上方に配置した調節棒ｄを、逃し弁ａの本体頂部ｅに出没自在に突設し、該頂部ｅに設けた梃子装置ｆの槓杆ｇで調節棒ｄを押圧することで、弁棒ｃを介して弁体ｂを強制的に開弁する構造が採用されている。
そして、頂部ｅにおける梃子装置ｆの取付け構造にあっては、頂部ｅ下方に周設した鍔部ｈと、調節棒ｄの支持ナットｉ間に、梃子装置ｆの支持金具ｊにおけるリング状基部ｋを頂部ｅに対し回転自在に介在し、又リング状基部ｋの直径方向に上方突設した一対の立壁ｌ、l1と、槓杆ｇの左右に設けた側壁ｍ、m1に略Ｃ型の線細工バネｎの端部を差し通して、槓杆ｇを回動自在に設けていた。
そして、この梃子装置ｆは、槓杆ｇを回動して倒立させることにより、槓杆ｇの前端部によって調節棒ｄを押し下げて弁体ｂを強制開弁し、槓杆ｇはかかる倒立状態を保持することで開弁状態を維持する様に成している。
【０００３】
【発明が解決しようとする課題】
しかしながら、一般に温水機器用の逃し弁ａは、梃子装置ｆで逃し弁ａが正常に作動するか否か、即ち弁体ｂが逃し弁ａの１次側と２次側を連通する様に開弁するか否かを定期的に確認する必要があり、上記構造の梃子装置ｆにおいて作動確認する場合、上記と同様に槓杆ｇを倒立させていたため、この確認操作の後に槓杆ｇを通常姿勢に復帰させることを忘れると開弁状態のまま放置され、逃し弁ａとして機能しない課題を有していた。
【０００４】
【課題を解決するための手段】
本発明は、上記課題に鑑み、弁棒を介して弁体に連繋すると共に、バネにて本体頂部に出没自在に設けた調節棒を、押圧及び押圧解除することで弁体を開閉操作する槓杆を設けた逃し弁の梃子装置において、槓杆を断面略Ｌ字状に形成すると共に、該槓杆の底板部を調節棒の上方に配置して前後に揺動自在に設け、底板部上方に第１支軸を設けると共に、底板部に直立した前板部に第２支軸を第１支軸の真横平行に設け、第１支軸と前板部間の距離を底板部と第１支軸間の距離より長くして、且つ槓杆の前方揺動で槓杆の前板部が調節棒を開弁位置へ押し下げ保持する長さに設定し、槓杆の前方揺動で第１支軸を回転中心とする第２支軸の円弧軌道を槓杆が第２支軸を始端とする位置から調節棒の突出端部を通り本体頂部上の第１支軸の垂下位置に渡って設け、槓杆の後方揺動で第２支軸を回転中心とする第１支軸の円弧軌道を槓杆が第１支軸を始端とする位置から槓杆の底板部が調節棒を押圧可能な範囲に渡って設けることにより、槓杆を前方又は後方揺動することで槓杆に対する操作力を解除した時に調節棒の押し下げ状態を保持するか、又は槓杆を通常姿勢に復帰させる様にして、槓杆の揺動操作を前方か後方かに切り換えることによって、従来同様に弁体の強制開弁する場合と、弁体の作動確認する場合との操作を区別し、作動確認に際しては、槓杆を手放せば調節棒を上方付勢しているバネで自動的に復帰させて、開弁状態のまま放置しない様にする。
【０００５】
【発明の実施の形態】
以下本発明の実施の形態を図面に基づいて説明する。
１は入口２と出口３の流路を直角に形成した温水機器用逃し弁の本体であり、該本体１は入口２を設けた弁箱４上に、流路を１次（入口２）側流路５と２次（出口３）側流路６に区割するダイヤフラム７を介して、出口３を設けたバネ箱８を接合し、該バネ箱８上に２次側流路６と区画形成された円筒形状の調節室９を立設している。
【０００６】
又、ダイヤフラム７は、中央に開口部10を形成し、該開口部10に筒状の弁口ガイド11を挿嵌し、該弁口ガイド11の中空部を弁口12と成すと共に、弁口ガイド11の１次側開口端部を弁座13と成している。
又、弁口ガイド11は、ダイヤフラム７の１次側表面（下面）に接合する円盤状のダイヤフラム押さえ14を弁座13より段差を設けて周設している。
【０００７】
又、上記ダイヤフラム押さえ14に対応して、ダイヤフラム７の２次側表面（上面）にも、円盤状のダイヤフラム押さえ15を接合しており、このダイヤフラム押さえ15は、ダイヤフラム７の開口部10に対応した開口部16を中央に設けている。
又、ダイヤフラム押さえ15の非接合面（上面）における開口部16周囲に環状の凹部17を形成している。
そして、弁口ガイド11の２次側開口端部13ａを凹部17上に掛止する様に外方へ折曲してかしめ、かかる折曲部13ａにより、ダイヤフラム押さえ14、15間にダイヤフラム７を挟持している。
又、ダイヤフラム７下面のダイヤフラム押さえ14は、その外周側を弁箱４上部に設けた受承面18上に載置している。
【０００８】
又、ダイヤフラム押さえ15の上面には、弁棒ガイド19を固定しており、該弁棒ガイド19は、所定口径の円筒状の外輪部20中央に、これより長い円筒状のガイド部21を配置し、該ガイド部21の外壁より放射状に突出した複数の支持片22、22ａ…を外輪部20の内壁に架設し、外輪部20、ガイド部21及び支持片22、22ａ…で区画された中空部を、上下に貫通した流通路23、23ａ…と成している。
24は上記外輪部20の外壁下部に外方突設した円盤状の固定部であり、該固体部24を上記凹部17上に固定し、弁棒ガイド19をダイヤフラム押さえ15に一体的に固定している。
【０００９】
25は弁座13に着離自在に設けた弁体であり、該弁体25の中央に２次側へ突出する弁棒26を立設し、該弁棒26を弁棒ガイド19のガイド部21に摺動自在に挿通している。
弁棒26は先端に鍔状のバネ受け27を設け、該バネ受け27に対向する上記ガイド部21の上端面を別途バネ受け28と成し、両バネ受け27、28間にリフトバネ29を圧縮介装し、弁体25を閉弁する様に付勢している。
又、２次側のダイヤフラム押さえ15（固定部 24 ）と、２次側流路６（バネ箱８内）の上面部間に調節バネ30を圧縮介装し、ダイヤフラム７を１次側流路５側へ押圧する様に付勢している。
【００１０】
調節室９は、上部を開口形成し、内方底部31の中心に２次側流路６に連通して、且つ弁棒26上に対応した貫通孔32を設けている。
33は弁棒26に連繋して弁体25を強制開弁させる調節棒であり、該調節棒33は、調節室９より長く、貫通孔32に摺動自在に挿通して、その下端を弁棒26上に離隔配置している。
又、調節棒33は、その中央部の上下に鍔片34、34ａを設け、下方の鍔片34ａをバネ受けと成し、該バネ受け34ａと調節室９の内方底部31間に戻しバネ35を圧縮介装している。
そして、調節室９の上方開口部に、調節棒33を摺動自在に貫通突出する螺子蓋36を螺入し、該螺子蓋36の下部で調節棒33の上方の鍔片34を押圧して、戻しバネ35の弾性を調節し、調節棒33を調節室９（螺子蓋36）上より出没自在に突設している。
【００１１】
37は本体頂部（調節室９）に突出している調節棒33を押圧及び押圧解除することで弁体25を開閉操作する梃子装置であり、該梃子装置37は本体頂部９に取付けた支持金具38と、支持金具38に第１、第２支軸39、40で以て前後に揺動自在に設けた槓杆41とから成る。
【００１２】
支持金具38は、バネ鋼材など塑性変形しない程度の弾性を有する材質により一体形成され、本体頂部９に外嵌装着されるＣ型止め輪から成る装着部42と、該装着部42の左右端部に装着部42の直径幅を以て対向立設した一対の矩形状の軸受板43、43ａとから成る。
44、44ａは装着部42の開口端部であり、該開口端部44、44ａは軸受板43、43ａ間で左右対称位置に設けている。
又、軸受板43、43ａには、槓杆41の第１、第２支軸39、40夫々の円弧軌道45、45ａ、46、46ａを貫設しており、第１支軸39及び第２支軸40の円弧軌道45、45ａ、46、46ａの夫々は、第２支軸40及び第１支軸39を回転中心として同一半径Ｒで交わった円周Ｓ、S1上に設け、第１支軸39及び第２支軸40の円弧軌道45、45ａ、46、46ａの各始端47、47ａ、48、48ａを同一水平線上で第１支軸39及び第２支軸40の回転中心位置47、47ａ、48、48ａに配している。
【００１３】
そして、支持金具38を本体頂部９に取付けた状態で、第１支軸39の円弧軌道45、45ａの始端47、47ａを調節棒33の上方垂直線上に配置すると共に、第１支軸39を回転中心とする第２支軸40の円弧軌道46、46ａをその始端48、48ａから左回りに調節棒33の突出端部を通る様に円周Ｓの略４分の１相当分設け、かかる円弧軌道46、46ａの終端50、50ａを第１支軸39の鉛直位置に配している。
又、第２支軸40を回転中心とする第１支軸39の円弧軌道45、45ａをその始端47、47ａから右回りに所定長さ分設け、かかる円弧軌道45、45ａの終端49、49ａを第２支軸40の円弧軌道46、46ａに交差しない様に成している。
【００１４】
槓杆41は、金属帯板を断面略Ｌ字状に形成して、底板部51とこれの前端部に直立に設けた前板部52とから成り、底板部51は、その前方部位から前板部52の基端部（底板部51の前端部）に渡って下方へ湾出形成し、かかる部位を湾出部51ａと成している。
又、底板部51中央の左右端に横長板状の軸支持片53、53ａを立設し、該軸支持片53、53ａは一端が上記底板部51の湾出部51ａ上方へ突出し、その突出端部に軸穴54、54ａを貫設し、該軸穴54、54ａに貫通した第１支軸39を軸支持片53、53ａに架設し、又上記前板部52の左右端部において、第１支軸39の真横平行に第２支軸40を突設している。
尚、底板部51の後方は槓杆41の柄55と成している。
【００１５】
そして、槓杆41の第１支軸39及び第２支軸40の夫々を、支持金具38の軸受板43、43ａに貫設した円弧軌道45、45ａ、46、46ａに移動自在に装着し、一方本体頂部９の上部外周に装着部42の肉厚より間隔大に刻設した溝部56に、支持金具38の装着部42を本体頂部９に対し回転自在に取付けて梃子装置37を構成している。
かかる状態にあっては、槓杆41はその底板部51の湾出部51ａを調節棒33の上方に配置し、第１支軸39を以て前方揺動自在に、第２支軸40を以て後方へ揺動自在に成している。
【００１６】
ここに、槓杆41における第１支軸39と槓杆41の前板部52間の距離Ｘは、槓杆41の底板部51と第１支軸39間の距離Ｙより長くして、且つ槓杆 41 の前方揺動で前板部52が調節棒33を開弁位置へ押し下げ保持する長さＬに設定しており、第１、第２支軸39、40をこれらの円弧軌道45、45ａ、46、46ａにおける始端47、47ａ、48、48ａに配置した槓杆41の通常姿勢から、前方揺動の支点位置（円弧軌道45、45ａの始端）47、47ａに存する第１支軸39を支点として、槓杆41を前方揺動することで、前板部52に設けた第２支軸40を円弧軌道46、46ａに沿ってその始端48、48ａから終端50、50ａまで移動させ、第２支軸40が円弧軌道46、46ａの終端50、50ａに到達した状態で前板部52は本体頂部９から突出している調節棒33を下方垂直に押圧し、支点位置47、47ａで支持されている第１支軸39が前板部52との上記距離Ｘ（Ｌ）を保持していることにより、調節棒33の押圧による弁体25の強制開弁状態を維持する様に成している。
【００１７】
又、第２支軸40を回転中心とする第１支軸39の円弧軌道45、45ａは、上記の通り、その始端47、47ａから右回りに所定長さ分、即ち槓杆41が第２支軸40の回転中心位置47、47ａ（槓杆41が第１支軸39を始端とする位置）から底板部51が調節棒33を押圧可能な範囲に渡って設けているので、調節棒33上に配置して成る槓杆41の通常姿勢から、後方揺動の支点位置48、48ａに存する第２支軸40を支点として、第１支軸39を円弧軌道45、45ａに沿ってその始端47、47ａから右回りに移動する様に槓杆41を後方揺動することで、底板部51の湾曲部51ａがその下部の調節棒33を押し下げ、又槓杆41への押し下げ力を解除すると、戻しバネ35の弾性力により調節棒33及び槓杆41は通常姿勢に復帰する様に成している。
【００１８】
次に本発明に係る逃し弁の梃子装置の作用について説明する。
本体１において、１次側流路５の圧力が２次側流路６より上がると、調節バネ30の弾性力に抗してダイヤフラム７を２次側流路６の方へ押圧する。
ダイヤフラム７と共に弁棒26も移動し、その先端が調節棒33の下端に接触することで、リフトバネ29の弾性力に抗して弁棒26を押し戻し、これにより弁体25が開弁し、１次側流路５から２次側流路６へ流体が流動し、１次側流路５の圧力が下がると、弁体25が閉弁する。
【００１９】
そして、弁体25を強制開弁する時は、図11に示す通常姿勢の槓杆41を支点位置47、47ａに存する第１支軸39を支点として、槓杆41の柄55を引き起こす様に上方へ回動して前方揺動することで、槓杆41の前板部52に設けた第２支軸40を円弧軌道46、46ａに沿ってその始端48、48ａから第１支軸39の下方垂直位置の終端50、50ａまで移動させ、図12の様に槓杆41の前板部52を９０度転回させる。
この転回中において、槓杆41の前板部52は、円弧軌道46、46ａの途中に存する調節棒33の突出端部を下方へ押圧し、第２支軸40が円弧軌道46、46ａの終端50、50ａに到達したところで、調節棒33を下方垂直に押圧する。
【００２０】
かかる状態において、槓杆41の底板部51と第１支軸39間の距離Ｙより長く、且つ槓杆41の前板部52が調節棒33を開弁位置へ押し下げ保持する長さＬに設定された第１支軸39と前板部52間の距離Ｘが、調節棒33の延長線上にある支点位置47、47ａで第１支軸39を支持する軸受板43、43ａによって保持されているため、図12の如く槓杆41の前板部52がその下部の調節棒33を開弁位置へ押し下げた状態、即ち弁体25の開弁状態を維持している。
【００２１】
又、弁体25の作動確認時には、槓杆41を後方揺動、即ち槓杆41の柄55を押し下げる様に下方へ揺動することで、槓杆41は支点位置48、48ａに存する第２支軸40を支点として、円弧軌道45、45ａ上を第１支軸39がその始端47、47ａから右回りに移動し、図13の様に槓杆41における底板部51の湾曲部51ａがその下部に存する調節棒33を押し下げ、又槓杆41への押し下げ力を解除すると、戻しバネ35の弾性力により、槓杆41及び調節棒33は図11に示す通常姿勢に復帰する。
【００２２】
【発明の効果】
要するに本発明は、弁棒26を介して弁体25に連繋すると共に、バネ35にて本体頂部９に出没自在に設けた調節棒33を、押圧及び押圧解除することで弁体25を開閉操作する槓杆41を設けた逃し弁の梃子装置37において、槓杆41を断面略Ｌ字状に形成すると共に、該槓杆41の底板部51を調節棒33の上方に配置して前後に揺動自在に設け、底板部51上方に第１支軸39を設けると共に、底板部51に直立した前板部52に第２支軸40を第１支軸39の真横平行に設け、第１支軸39と前板部52間の距離Ｘを底板部51と第１支軸39間の距離Ｙより長くして、且つ槓杆 41 の前方揺動で槓杆 41 の前板部52が調節棒33を開弁位置へ押し下げ保持する長さＬに設定し、槓杆 41 の前方揺動で第１支軸39を回転中心とする第２支軸40の円弧軌道46、46ａを槓杆41が第２支軸40を始端とする位置48、48ａから調節棒33の突出端部を通り本体頂部９上の第１支軸39の垂下位置に渡って設けたので、強制開弁時において、支点位置47、47ａで第１支軸39を支点として槓杆41を前方揺動することにより、槓杆41の前板部52に設けた第２支軸40を円弧軌道46、46ａに沿ってその始端 48 、 48 ａから第１支軸39の垂直下位置の終端50、50ａまで移動させ、この移動中に槓杆41の前板部52が円弧軌道46、46ａの途中に存する調節棒33の突出端部を下方へ押圧し、第２支軸40が円弧軌道46、46ａの終端50、50ａに到達したところで、調節棒33の延長線上の前方揺動の支点位置47、47ａに支持された第１支軸39から上記距離Ｘ（Ｌ）を有した鉛直方向に前板部52を配置させることにより、バネ35の弾性力に抗して調節棒33を下方垂直に押圧保持でき、弁体25の開弁状態を維持できる。
【００２３】
又、槓杆 41 の後方揺動で第２支軸40を回転中心とする第１支軸39の円弧軌道45、45ａを槓杆41が第１支軸39を始端とする位置47、47ａから槓杆 41 の底板部51が調節棒33を押圧可能な範囲に渡って設けたので、弁体25の作動確認時において、支点位置48、48ａで第２支軸40を支点として槓杆41を後方揺動することにより、円弧軌道45、45ａに沿って移動する槓杆41の底板部51がその下部に存する調節棒33を押し下げ、これにより戻しバネ35の弾性力が調節棒33に作用していることを槓杆41から伝わる手応えで弁体25が正常に働いているかを確認でき、その後槓杆41を手放せば、戻しバネ35の弾性力により、槓杆41及び調節棒33を通常姿勢に復帰させられ、従来の様な開弁状態のまま放置されるといった不具合を解消できる。
【００２４】
よって、本発明によれば、槓杆41を前方又は後方揺動することで、槓杆41に対する操作力を解除した時に調節棒33の押し下げ状態を保持するか、又は通常姿勢に復帰させる様にして、槓杆41の揺動操作を前方か後方かに切り換えることによって、弁体25の強制開弁する場合と弁体25の作動確認する場合との操作を区別し、特に弁体25の作動確認時における開弁状態のままでの放置による不具合を解消できる。
【００２５】
又、槓杆41を設けた支持金具38に、Ｃ型止め輪から成る装着部42を設け、該装着部42を本体頂部９の外周に刻設した溝部56に取付けたので、Ｃ型止め輪用の専用治具を用いて装着部42を開き、溝部56に嵌め込むだけの簡単な作業で梃子装置37を取付けできる。
又、梃子装置37は、支持金具38と槓杆41の２物品で、従来品に比較して部品点数が極めて少なく、両物品の組み付け、及び本体１への取付け工程が減り、作業効率が良い。
又、梃子装置37は、従来の様に支持ナットｈによる取付けではないため、本体頂部９への雄螺子の刻設を不要とし、製造コストを低減でき、しかも逃し弁ａの据え付け場所によっては、振動等の外的要因により、支持ナットｉが弛んで外れ、逃し弁ａが機能しない恐れがあるといった欠点をも解消できる等その実用的効果甚だ大である。
【図面の簡単な説明】
【図１】逃し弁本体の断面図である。
【図２】梃子装置の平面図である。
【図３】梃子装置の正面図である。
【図４】梃子装置の側面図である。
【図５】支持金具の平面図である。
【図６】支持金具の正面図である。
【図７】支持金具の側面図である。
【図８】槓杆の平面図である。
【図９】槓杆の正面図である。
【図１０】槓杆の側面図である。
【図１１】槓杆の通常姿勢を示す要部断面図である。
【図１２】槓杆による強制開弁状態を示す要部断面図である。
【図１３】槓杆による作動確認状態を示す要部断面図である。
【図１４】従来の逃し弁の断面図である。
【図１５】梃子装置の取付け状態を示す斜視図である。
【符号の説明】
９本体頂部
25 弁体
26 弁棒
33 調節棒
35 バネ
37 梃子装置
38 支持金具
39 第１支軸
40 第２支軸
41 槓杆
42 装着部
45、45ａ円弧軌道
46、46ａ円弧軌道
47 、 47 ａ始端
48 、 48 ａ始端
51 底板部
52 前板部
56 溝部
Ｌ長さ
Ｘ距離
Ｙ距離[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lever device for a relief valve for a hot water device provided on a hot water side or a water supply side of a heat exchanger for hot water.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 14 and 15, this type of relief valve a has an adjustment rod d disposed above the valve stem c in order to adjust the lift of the valve body b to the top e of the body of the relief valve a. A structure is adopted in which the valve body b is forcibly opened through the valve rod c by protruding and retracting and pressing the adjusting rod d with the rod g of the lever device f provided on the top portion e. Yes.
And in the attachment structure of the lever apparatus f in the top part e, the ring-shaped base k in the support bracket j of the lever apparatus f is provided between the hook part h provided below the top part e and the support nut i of the adjusting rod d. With a pair of standing walls l and l1 projecting upward in the diametrical direction of the ring-shaped base k, and side walls m and m1 provided on the left and right sides of the ridge g. The end of the spring n was inserted and the heel g was provided so as to be rotatable.
Then, the lever device f rotates and reverses the rod g to push down the adjustment rod d by the front end portion of the rod g to forcibly open the valve body b, and the rod g maintains such an inverted state. In this way, the valve opening state is maintained.
[0003]
[Problems to be solved by the invention]
However, in general, the relief valve a for hot water equipment is opened so that the relief valve a operates normally in the insulator device f, that is, the valve body b communicates with the primary side and the secondary side of the relief valve a. It is necessary to periodically check whether or not the valve is to be operated. When confirming the operation in the lever device f having the above-described structure, the hook g is inverted as described above. If it is forgotten to return, the valve is left open and does not function as the relief valve a.
[0004]
[Means for Solving the Problems]
In view of the above problems, the present invention is connected to the valve body via the valve rod, and opens and closes the valve body by pressing and releasing the adjustment rod provided at the top of the main body by a spring. In the relief device of the relief valve provided with the rod, the rod is formed in a substantially L-shaped cross section, and the bottom plate portion of the rod is disposed above the adjustment rod so as to be swingable back and forth, and the first above the bottom plate portion. A support shaft is provided, and a second support shaft is provided on the front plate portion standing upright on the bottom plate portion in parallel with the first support shaft, and the distance between the first support shaft and the front plate portion is set between the bottom plate portion and the first support shaft. and greater than the distance, and the front plate portion of the Replace forward swing of the Replace is set to a length that holds down on the control rod in the valve opening position, rotating about a first support shaft in front rocking the Replace droop of the first shaft Replace the circular arc track of the second support shaft are on streets body upper portion projecting end of control rod from a position of the second support shaft and the beginning of the to Provided over the location, press the bottom plate portion of the first Replace the circular arc track of the support shaft is Replace from the position of the first support shaft and the starting end regulating rod to rotate about the second support shaft at the rear swinging the Replace By providing it over the possible range, hold down the adjusting rod when the operating force on the heel is released by swinging the heel forward or backward, or return the heel to the normal posture, By switching the swinging operation of the heel to the front or the rear, the operation for forcibly opening the valve body and the operation for checking the operation of the valve body are distinguished from each other as in the past. For example, the adjusting rod is automatically returned by the spring biased upward so that the valve is not left open.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 is a main body of a relief valve for hot water equipment in which the flow paths of the inlet 2 and the outlet 3 are formed at right angles. The main body 1 is arranged on the valve box 4 provided with the inlet 2 on the primary (inlet 2) side. A spring box 8 provided with the outlet 3 is joined via a diaphragm 7 which is divided into a flow path 5 and a secondary (outlet 3) side flow path 6, and the secondary side flow path 6 and the partition are formed on the spring box 8. The formed cylindrical adjustment chamber 9 is erected.
[0006]
The diaphragm 7 has an opening 10 in the center, a tubular valve port guide 11 is inserted into the opening 10, the hollow portion of the valve port guide 11 is formed with the valve port 12, and the valve port The primary opening end of the guide 11 is formed with the valve seat 13.
The valve port guide 11 is provided with a disc-shaped diaphragm retainer 14 joined to the primary side surface (lower surface) of the diaphragm 7 so as to have a step from the valve seat 13.
[0007]
Corresponding to the diaphragm retainer 14, a disk-shaped diaphragm retainer 15 is also joined to the secondary surface (upper surface) of the diaphragm 7. The diaphragm retainer 15 corresponds to the opening 10 of the diaphragm 7. The opening 16 is provided in the center.
An annular recess 17 is formed around the opening 16 in the non-joint surface (upper surface) of the diaphragm retainer 15.
Then, the secondary opening end 13a of the valve port guide 11 is bent outwardly so as to be hooked on the recess 17, and the diaphragm 7 is inserted between the diaphragm holders 14 and 15 by the bent portion 13a. It is pinched.
The diaphragm retainer 14 on the lower surface of the diaphragm 7 is placed on the receiving surface 18 provided on the valve box 4 at the outer periphery.
[0008]
A valve stem guide 19 is fixed to the upper surface of the diaphragm retainer 15. The valve stem guide 19 has a cylindrical guide portion 21 which is longer than the cylindrical outer ring portion 20 in the center. A plurality of support pieces 22, 22 a... Projecting radially from the outer wall of the guide part 21 are installed on the inner wall of the outer ring part 20, and are hollow defined by the outer ring part 20, the guide part 21 and the support pieces 22, 22 a. The flow passages 23, 23a, etc. penetrating vertically are formed.
24 is a disk-shaped fixing part projecting outwardly on the lower part of the outer wall of the outer ring part 20, the solid part 24 is fixed on the concave part 17, and the valve stem guide 19 is fixed integrally to the diaphragm retainer 15. ing.
[0009]
A valve body 25 is provided on the valve seat 13 so as to be freely attached to and detached from the valve seat 25. 21 is slidably inserted.
The valve stem 26 is provided with a hook-shaped spring receiver 27 at the tip, and the upper end surface of the guide portion 21 facing the spring receiver 27 is separately formed as a spring receiver 28. The lift spring 29 is compressed between the spring receivers 27 and 28. The valve body 25 is urged so as to close.
An adjustment spring 30 is interposed between the upper surface of the secondary diaphragm holder 15 (fixed portion 24 ) and the secondary flow path 6 (in the spring box 8) to compress the diaphragm 7 into the primary flow path. It is energized to press to the 5 side.
[0010]
The adjustment chamber 9 has an opening at the top, and is provided with a through hole 32 that communicates with the secondary flow path 6 at the center of the inner bottom portion 31 and that corresponds to the valve rod 26.
33 is an adjusting rod that is connected to the valve rod 26 and forcibly opens the valve body 25. The adjusting rod 33 is longer than the adjusting chamber 9 and is slidably inserted into the through-hole 32, and its lower end is valved. Separated on bar 26.
The adjusting rod 33 is provided with hooks 34, 34a at the upper and lower portions of the center thereof, and the lower hook 34a is formed as a spring receiver, and a return spring is provided between the spring receiver 34a and the inner bottom 31 of the adjusting chamber 9. 35 with compression.
Then, a screw lid 36 that slidably protrudes through the adjustment rod 33 is screwed into the upper opening of the adjustment chamber 9, and the flange 34 above the adjustment rod 33 is pressed under the screw lid 36. The elasticity of the return spring 35 is adjusted, and an adjustment rod 33 is projected from the adjustment chamber 9 (screw cover 36) so as to be able to protrude and retract.
[0011]
Reference numeral 37 denotes a lever device that opens and closes the valve body 25 by pressing and releasing the adjustment rod 33 protruding from the top of the main body (the adjustment chamber 9). The lever device 37 is a support fitting 38 attached to the top portion 9 of the main body. And a flange 41 provided on the support bracket 38 so as to be swingable back and forth by the first and second support shafts 39 and 40.
[0012]
The support bracket 38 is integrally formed of a material having elasticity that does not cause plastic deformation, such as spring steel, and includes a mounting portion 42 formed of a C-type retaining ring that is externally mounted on the top 9 of the main body, and left and right end portions of the mounting portion 42. And a pair of rectangular bearing plates 43, 43a that are opposed to each other with a diameter width of the mounting portion 42.
44 and 44a are opening end portions of the mounting portion 42, and the opening end portions 44 and 44a are provided at symmetrical positions between the bearing plates 43 and 43a.
Further, the bearing plates 43 and 43a are respectively provided with circular arc tracks 45, 45a, 46 and 46a of the first and second support shafts 39 and 40 of the flange 41, and the first support shaft 39 and the second support shaft 39a. Each of the circular arc tracks 45, 45a, 46, 46a of the shaft 40 is provided on the circumferences S, S1 intersecting with the same radius R around the second support shaft 40 and the first support shaft 39 as the first support shaft. 39 and the arcuate paths 45, 45a, 46, 46a of the second support shaft 40, respectively, the rotational ends 47, 47a of the first support shaft 39 and the second support shaft 40 on the same horizontal line. , 48, 48a.
[0013]
Then, with the support metal fitting 38 attached to the top 9 of the main body, the starting ends 47, 47a of the arc tracks 45, 45a of the first support shaft 39 are arranged on the vertical line above the adjustment rod 33, and the first support shaft 39 is The circular orbits 46 and 46a of the second support shaft 40, which is the center of rotation, are provided in an amount corresponding to approximately one quarter of the circumference S so as to pass counterclockwise from the starting ends 48 and 48a and through the protruding end of the adjusting rod 33. Ends 50 and 50a of the circular arc tracks 46 and 46a are arranged at the vertical position of the first support shaft 39.
Further, arc trajectories 45, 45a of the first support shaft 39 centering on the second support shaft 40 are provided in a predetermined amount clockwise from the start ends 47, 47a, and the end points 49, 49a of the arc tracks 45, 45a are provided. Is formed so as not to intersect the arc tracks 46 and 46a of the second support shaft 40.
[0014]
The flange 41 is formed of a bottom plate portion 51 and a front plate portion 52 provided upright at a front end portion of the metal plate, which has a substantially L-shaped cross section, and the bottom plate portion 51 extends from the front portion to the front plate. The portion 52 is formed to protrude downward over the base end portion (the front end portion of the bottom plate portion 51), and this portion is formed as a protruding portion 51a.
Also, horizontally long plate-like shaft support pieces 53 and 53a are provided on the left and right ends of the center of the bottom plate portion 51. One end of each of the shaft support pieces 53 and 53a protrudes above the protruding portion 51a of the bottom plate portion 51, and the protrusion Shaft holes 54 and 54a are penetrated at the end, the first support shaft 39 penetrating through the shaft holes 54 and 54a is installed on the shaft support pieces 53 and 53a, and at the left and right ends of the front plate portion 52, A second support shaft 40 protrudes directly parallel to the first support shaft 39.
The rear side of the bottom plate portion 51 is formed with a handle 55 of the collar 41.
[0015]
Then, the first support shaft 39 and the second support shaft 40 of the rod 41 are respectively movably mounted on arcuate tracks 45, 45a, 46, 46a penetrating the bearing plates 43, 43a of the support bracket 38, A lever device 37 is configured by rotatably mounting the mounting portion 42 of the support bracket 38 on the main body top portion 9 in a groove portion 56 which is formed on the outer periphery of the upper portion of the main body top portion 9 with a larger interval than the thickness of the mounting portion 42. .
In such a state, the rod 41 has the protruding portion 51a of the bottom plate portion 51 disposed above the adjustment rod 33, and can be swung forward by the first support shaft 39, and can be swung rearward by the second support shaft 40. It is freely movable.
[0016]
Here, the distance X between the front plate portion 52 of the first support shaft 39 and the Replace 41 in Replace 41 has a bottom plate portion 51 of the Replace 41 is made longer than the distance Y between the first support shaft 39, and the Replace 41 is the front plate portion 52 at the front swing is set to a length L that holds down on the control rod 33 to the open position, the first and second support shafts 39 and 40 of these circular arc track 45, 45a, 46 From the normal posture of the rod 41 arranged at the start ends 47, 47a, 48, 48a at 46a, the first support shaft 39 existing at the fulcrum positions 47, 47a of the forward swing (the arc trajectories 45, 45a) as fulcrums, By swinging the flange 41 forward, the second support shaft 40 provided on the front plate portion 52 is moved along the arcuate tracks 46, 46a from the start ends 48, 48a to the end ends 50, 50a. The first plate 52 is supported at the fulcrum positions 47 and 47a by vertically pressing the adjusting rod 33 projecting from the top 9 of the main body 9 in a state where the ends 50 and 50a of the circular arc tracks 46 and 46a are reached. Spindle 39 holds the distance X (L) from the front plate portion 52, so that the forced opening state of the valve body 25 by the pressing of the adjusting rod 33 is maintained.
[0017]
Further, as described above, the arcuate tracks 45 and 45a of the first support shaft 39 centering on the second support shaft 40 have a predetermined length in the clockwise direction from the start ends 47 and 47a, that is, the flange 41 has the second support. since the rotation center position 47,47a axis 40 (Replace 41 position to the first support shaft 39 and the starting end) are provided over a depressible range control rod 33 is the bottom plate portion 51 from the upper control rod 33 From the normal posture of the rod 41 arranged, the first support shaft 39 is moved along the arcuate tracks 45 and 45a with the second support shaft 40 existing at the fulcrum positions 48 and 48a of the backward swinging as the fulcrums 47, 47a. When the flange 41 is swung backward so as to move clockwise from the curved portion 51a, the curved portion 51a of the bottom plate portion 51 pushes down the lower adjustment rod 33, and when the pushing force to the flange 41 is released, the return spring 35 The adjustment rod 33 and the rod 41 are returned to the normal posture by the elastic force.
[0018]
Next, the operation of the lever device for the relief valve according to the present invention will be described.
In the main body 1, when the pressure of the primary flow path 5 rises from the secondary flow path 6, the diaphragm 7 is pressed toward the secondary flow path 6 against the elastic force of the adjustment spring 30.
The valve rod 26 also moves together with the diaphragm 7, and its tip contacts the lower end of the adjustment rod 33, thereby pushing back the valve rod 26 against the elastic force of the lift spring 29, thereby opening the valve body 25. When the fluid flows from the secondary channel 5 to the secondary channel 6 and the pressure in the primary channel 5 decreases, the valve body 25 closes.
[0019]
When the valve body 25 is forcibly opened, the hook 41 in the normal posture shown in FIG. 11 is used as the fulcrum at the first support shaft 39 at the fulcrum positions 47 and 47a, and the handle 55 of the hook 41 is raised upward. By rotating and swinging forward, the second support shaft 40 provided on the front plate portion 52 of the flange 41 is moved downward along the circular arc tracks 46 and 46a from the start ends 48 and 48a to the lower vertical position of the first support shaft 39. And the front plate portion 52 of the flange 41 is turned 90 degrees as shown in FIG.
During this turning, the front plate portion 52 of the flange 41 presses the protruding end of the adjusting rod 33 existing in the middle of the arc tracks 46, 46a downward, and the second support shaft 40 is moved to the end 50 of the arc tracks 46, 46a. , 50a is reached, the adjustment rod 33 is pressed vertically downward.
[0020]
In this state, the bottom plate portion 51 of the Replace 41 longer than the distance Y between the first support shaft 39, and the front plate portion 52 of the Replace 41 is set to a length L that holds down on the control rod 33 to the open position The distance X between the first support shaft 39 and the front plate portion 52 is held by the bearing plates 43 and 43a that support the first support shaft 39 at the fulcrum positions 47 and 47a on the extension line of the adjustment rod 33. As shown in FIG. 12, the front plate portion 52 of the flange 41 keeps the lower adjustment rod 33 pushed down to the valve opening position, that is, the valve body 25 is kept open.
[0021]
Further, when the operation of the valve body 25 is confirmed, the rod 41 is swung backward, that is, is swung downward to push down the handle 55 of the rod 41, so that the rod 41 is located at the fulcrum positions 48, 48a. The first support shaft 39 moves clockwise from the starting ends 47, 47a on the circular arc tracks 45, 45a with the fulcrum as a fulcrum, and the curved portion 51a of the bottom plate portion 51 of the ridge 41 is located at the lower portion as shown in FIG. When the rod 33 is pushed down and the pushing force to the rod 41 is released, the rod 41 and the adjusting rod 33 are returned to the normal posture shown in FIG. 11 by the elastic force of the return spring 35.
[0022]
【The invention's effect】
In short, the present invention is connected to the valve body 25 through the valve rod 26 and opens and closes the valve body 25 by pressing and releasing the adjustment rod 33 provided in the top portion 9 of the main body by the spring 35. In the relief valve lever device 37 provided with the flange 41, the flange 41 is formed in a substantially L-shaped cross section, and the bottom plate portion 51 of the flange 41 is disposed above the adjustment rod 33 so as to be swingable back and forth. The first support shaft 39 is provided above the bottom plate portion 51, and the second support shaft 40 is provided on the front plate portion 52 upright on the bottom plate portion 51 so as to be parallel to the first support shaft 39. and the distance X between the front plate portion 52 and the bottom plate portion 51 longer than the distance Y between the first support shaft 39, and the open position the control rod 33 the front plate portion 52 of the Replace 41 in front rocking the Replace 41 set length L that holds depressed to, Replace 41 circular arc track 46,46a of the second support shaft 40 to rotate about the first support shaft 39 in front oscillation of the Replace 41 a second support shaft 40 position and the starting 48, 48 Is provided over the projecting end of the adjustment rod 33 and the hanging position of the first support shaft 39 on the top 9 of the main body, so that when the valve is forcibly opened, the first support shaft 39 is used as a fulcrum at the support positions 47 and 47a by forward swing Replace 41, the vertically downward position of the first support shaft 39 and the second support shaft 40 provided on the front plate portion 52 along the circular arc track 46,46a from the starting end 48, 48 a of the Replace 41 During this movement, the front plate portion 52 of the rod 41 presses the protruding end of the adjusting rod 33 in the middle of the circular arc tracks 46, 46a downward, and the second support shaft 40 When the ends 50 and 50a of the tracks 46 and 46a are reached, the vertical X having the distance X (L) from the first support shaft 39 supported by the fulcrum positions 47 and 47a of the forward swing on the extension line of the adjusting rod 33 By disposing the front plate portion 52 in the direction, the adjustment rod 33 can be pressed and held vertically downward against the elastic force of the spring 35, and the valve body 25 can be kept open.
[0023]
Further, Replace 41 from the position 47,47a to Replace 41 circular arc track 45,45a of the first support shaft 39 to the first support shaft 39 and start to rotate about the second support shaft 40 at the rear swinging the Replace 41 Since the bottom plate portion 51 is provided over a range in which the adjustment rod 33 can be pressed, when the operation of the valve body 25 is confirmed, the rod 41 is swung backward at the fulcrum positions 48 and 48a with the second support shaft 40 as a fulcrum. As a result, the bottom plate portion 51 of the rod 41 moving along the arcuate tracks 45 and 45a pushes down the adjusting rod 33 existing below the rod 41, thereby confirming that the elastic force of the return spring 35 acts on the adjusting rod 33. It is possible to confirm that the valve body 25 is working normally by the response transmitted from 41, and then let go of the 槓杆 41, and the heel 41 and the adjustment rod 33 can be returned to the normal posture by the elastic force of the return spring 35. It is possible to solve the problem that the valve is left open.
[0024]
Therefore, according to the present invention, by swinging the rod 41 forward or backward, when the operating force on the rod 41 is released, the pressing state of the adjustment rod 33 is maintained, or the normal posture is restored, By switching the swing operation of 槓杆 41 between forward and backward, the operation of forcibly opening the valve body 25 and the operation confirmation of the operation of the valve body 25 are distinguished, especially when the operation of the valve body 25 is confirmed. Problems caused by leaving the valve open can be eliminated.
[0025]
In addition, a mounting portion 42 made of a C-type retaining ring is provided on the support bracket 38 provided with the flange 41, and the mounting portion 42 is attached to a groove portion 56 carved on the outer periphery of the main body top portion 9. The lever device 37 can be attached by a simple operation of opening the mounting portion 42 using the dedicated jig and fitting the groove portion 56 into the groove portion 56.
Further, the lever device 37 is a two-piece product of a support fitting 38 and a rod 41, and the number of parts is extremely small compared to the conventional product, and the assembly process of both items and the mounting process to the main body 1 are reduced, and the work efficiency is good.
Further, since the lever device 37 is not attached by the support nut h as in the prior art, it is not necessary to engrave a male screw on the top 9 of the main body, the manufacturing cost can be reduced, and depending on the installation location of the relief valve a, The practical effect is significant, such as the fact that the support nut i may loosen and come off due to external factors such as vibration and the relief valve a may not function.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a relief valve body.
FIG. 2 is a plan view of the lever device.
FIG. 3 is a front view of the lever device.
FIG. 4 is a side view of the lever device.
FIG. 5 is a plan view of a support fitting.
FIG. 6 is a front view of a support fitting.
FIG. 7 is a side view of the support fitting.
FIG. 8 is a plan view of a ridge.
FIG. 9 is a front view of a bag.
FIG. 10 is a side view of the bag.
FIG. 11 is a cross-sectional view of a main part showing a normal posture of the heel.
FIG. 12 is a cross-sectional view of a main part showing a forced valve opening state by a kite.
FIG. 13 is a cross-sectional view of a main part showing an operation confirmation state using a scissors.
FIG. 14 is a sectional view of a conventional relief valve.
FIG. 15 is a perspective view showing an attachment state of the lever device.
[Explanation of symbols]
9 Top of main body
25 Disc
26 Valve stem
33 Adjustment rod
35 Spring
37 Insulator device
38 Support bracket
39 First spindle
40 Second spindle
41 槓杆
42 Mounting part
45, 45a Circular orbit
46, 46a Circular orbit
47, 47 a beginning
48, 48 a beginning
51 Bottom plate
52 Front plate
56 Groove L Length X Distance Y Distance

Claims

In a lever device for a relief valve, which is connected to a valve body via a valve rod, and provided with a hook for opening and closing the valve body by pressing and releasing the adjustment rod provided to be able to move in and out of the top of the main body by a spring. The hook is formed to have a substantially L-shaped cross section, and the bottom plate portion of the hook is disposed above the adjustment rod so as to be swingable back and forth, the first support shaft is provided above the bottom plate portion, and the bottom plate portion The second support shaft is provided on the upright front plate portion in parallel with the first support shaft, the distance between the first support shaft and the front plate portion is longer than the distance between the bottom plate portion and the first support shaft, and forward front plate of the Replace with swing is set to a length that holds down on the control rod to the open position, the circular arc track of the second spindle to rotate about the first support shaft in front swinging of Replace the the Replace is provided over the hanging position of the first spindle on the street body upper portion a projecting end of control rod from a position of the second support shaft and the starting end, after Replace To Replace the circular arc track of the first support shaft and the second shaft and the center of rotation is provided over a depressible range bottom plate portion of the control rod of the Replace from a position of the first support shaft and the starting end with swing Relief valve lever device characterized by

2. A relief device for a relief valve according to claim 1, wherein a mounting portion made of a C-shaped retaining ring is provided on the support fitting provided with the flange, and the mounting portion is attached to a groove portion carved on the outer periphery of the top of the main body. .