JP4017026B2 - Valve and piping method thereof - Google Patents

Valve and piping method thereof Download PDF

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Publication number
JP4017026B2
JP4017026B2 JP15274196A JP15274196A JP4017026B2 JP 4017026 B2 JP4017026 B2 JP 4017026B2 JP 15274196 A JP15274196 A JP 15274196A JP 15274196 A JP15274196 A JP 15274196A JP 4017026 B2 JP4017026 B2 JP 4017026B2
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Japan
Prior art keywords
valve
resin
connection
tube
valve box
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JP15274196A
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Japanese (ja)
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JPH102441A (en
Inventor
二郎 荻野
伸二 高倉
茂 松崎
道昭 佃
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Daiwa House Industry Co Ltd
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Daiwa House Industry Co Ltd
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Priority to JP15274196A priority Critical patent/JP4017026B2/en
Priority to PCT/JP1997/004617 priority patent/WO1999031418A1/en
Publication of JPH102441A publication Critical patent/JPH102441A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/04Construction of housing; Use of materials therefor of sliding valves
    • F16K27/044Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
    • F16K27/047Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members with wedge-shaped obturating members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/0263Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor using particular material or covering means

Description

【0001】
【発明の属する技術分野】
本発明は、管体の一端を挿着して接続する接続部を備えたバルブ及びその配管方法に関する。
【0002】
【従来の技術】
従来から、水道等の配管において、各種のバルブが使用されている。これらバルブは、管体を接続するために、配管工事を行う必要があるが、従来は管継手を用いて配管工事が行われていた。
【0003】
図15に、従来のバルブとして、バルブ1を示す。このバルブ1は、ハンドル2を回動させることにより弁体3を上下に移動させ、水の流量を制御できるように構成されている。このようなバルブ1への管体4の接続は、バルブ1の接続部5に管継手6が螺入され、管継手6に管体4が嵌合されることにより行われる。ここで、管体4の管継手6への固定は管体4の外周又は管継手6の内周に接着剤が塗布されることにより行われる。
【0004】
【発明が解決しようとする課題】
しかし、このような管継手6によって接続する場合には、バルブ1の接続部5の雌螺子へ管継手6の雄螺子を螺入するため、内部の水がこの螺入部を伝って外へ漏れることがあった。このため、シール材を巻き付けたりしているが、長期間の使用においてシール材の劣化や、金属製のバルブ1と樹脂製の管継手6の熱膨張率の相違などによる緩みなどが生じて、漏水することがあった。また、管継手6は樹脂から構成されている場合が多いため、螺合時に雄螺子の螺子山が変形してしまうことがあり、螺入部に隙間が生じてしまうことがあった。また、管継手6の雄螺子の谷部に応力が集中するため、螺子山が谷部において破断してしまうことがあった。さらに、配管工事時に雄螺子にシールテープを巻いて螺入する必要があったため、配管工事が困難であり、作業時間及び人件費が嵩むこととなった。しかも、バルブ1に管体4を接続するために、別途、管継手6を準備しなければならず、部品点数及び作業工数が増加し、コストアップの原因となっていた。また、管継手6を用いないで、直接、管体4をバルブ1に接続するには、管体4の端部に螺子を切る必要があり、現場での作業工数が増加するという問題があった。
【0005】
そこで、本発明者は、このような課題を解決するべく鋭意研究した結果、本発明に到達した。
【0006】
【課題を解決するための手段】
本発明のバルブの要旨とするところは、管体の一端を接続する一又は複数の接続部と、弁体と少なくとも金属にて形成された弁箱とから成る弁体部を備えたバルブにおいて、前記接続部のうち少なくとも一の接続部が、筒状に形成されるとともに、該一の接続部以外の部分の一部又は全部を被覆する樹脂又はゴム等から一体的に形成されることにある。特には、管体の一端を圧入して接続する接続部と、弁体及び金属にて形成された弁箱から構成された弁体部と、を備えたバルブにおいて、前記接続部が、筒状に形成されるとともに、前記弁箱全部を被覆する樹脂カバーと一体的に樹脂から形成され、前記弁箱の内面が、前記樹脂により被覆されていることを特徴とする。
【0007】
すなわち、本発明のバルブは、一の接続部が樹脂又はゴム等から構成されている一方で、少なくとも弁体部は金属から構成されている。ここで、樹脂の種類は、管体を嵌合できるとともに破損しない程度の強度を有し、管体を嵌合させた時に水が漏れないように密閉できるものであれば、特に限定されず、合成樹脂を含む。また、ゴムの種類は、管体を嵌合できるとともに破損しない程度の強度を有し、管体を嵌合した時に水が漏れないように密閉できるものであれば、特に限定されず、合成ゴムを含む。また、弁体部とは、弁体が弁箱に対して離隔又は接近等することにより流体の流量又は圧力等を制御できるようにした、弁体及び弁箱を含む部分をいう。
【0008】
このようなバルブは、配管を行う時には、まず、接続部又は管体のいずれか一方に接着剤が塗布される。次に、管体が一の接続部に嵌合させられていき、管体が接続部から抜けないように奥の方まで挿入される。管体が一の接続部に嵌合させられた状態で養生されることにより、接着剤が乾燥して管体が一の接続部に強固に固定させられる。
【0009】
また、本発明のバルブにおいて、少なくとも弁箱の内面を樹脂又はゴムなどで被覆することにより、バルブ部における錆の発生を防止することができる。尚、弁箱だけでなく弁体も金属製である場合は、弁体についても樹脂などで被覆しておくのが好ましいが、本発明のバルブにおいては、樹脂などで形成された弁体を用いることが可能である。
【0010】
次に、本発明のバルブの配管方法の要旨とするところは、上記本発明のバルブを用いて、その筒状の一の接続部に管体の一端を挿着して接続することにある。このようなバルブの配管方法は、配管を行う時に、各種バルブの一の接続部へ管体の一端を接続するバルブの配管方法であり、バルブの一の接続部又は管体のいずれか一方に接着剤を塗布して、管体を接続部に挿入していき、管体を接続部に固定する方法である。
【0011】
【実施例】
次に、本発明に係るバルブ及びバルブの配管方法の実施例について、図面に基づいて詳しく説明する。
【0012】
図1及び図2において、符号12は本発明に係るバルブであり、符号10は管体接続構造である。この管体接続構造10は、水(流体)を閉止したり、流量を調整し得るように、水道用のバルブ12の接続部14へ管体16の一端を接続するための管体接続構造である。接続部14は樹脂からなり、管体16の一端を挿入し得る嵌合凹部18が備えられ、その嵌合凹部18は若干テーパ状に形成されている。なお、テーパ状とは、嵌合凹部18の内周が僅かに傾斜している状態をいう。すなわち、管体接続構造10は、バルブ12の中、接続部14及び接続部14付近を含む構造であり、管体16を圧入させて固定できるように施された構造である。
【0013】
ここで、バルブ12は、ハンドル22を回動させることにより、弁体部20の弁体24を上下に移動させて弁箱26に対して離隔又は接近させ、弁体24と弁箱26との隙間を流れる水の流量を制御できるように構成されている。ここで、図1は弁体24を最大限下降させて水の流れを閉止させた状態であり、図2は弁体24を最大限まで上昇させて水の流量が最大となっている状態を示している。なお、弁体24及び弁箱26は、青銅鋳物から構成されており、弁体24を弁箱26へ密着させた時に弁体24又は弁箱26が歪んで水が漏れることのないようにされている。ここで、弁体24及び弁箱26の材質は青銅鋳物に限定されず、鋳鉄、ステンレス、鍛鋼、鋳鋼等のその他の金属であっても良い。なお、図1及び図2に示すバルブ12は、2個の接続部14を備え、両方の接続部14を樹脂から構成しているが、一方の接続部14のみを樹脂から構成しても良い。
【0014】
また、接続部14はバルブ12の下部全体を覆う樹脂カバー28と一体となり、弁箱26の凸部30と嵌合するようにして固定されている。なお、接続部14の材質は、管体16を圧入できるとともに破損しない程度の強度を有し、管体16を圧入した時に水が漏れないように密閉できるものであれば、特に限定されないが、硬質塩化ビニルが通常使用される。特に、耐衝撃性硬質塩化ビニル又は耐熱性硬質塩化ビニルが好ましい。また、塩化ビニルは熱可塑性樹脂であるが、塩化ビニルと同程度又はそれ以上の強度を有するものであれば、ポリエチレン、ポリプロピレン等の熱可塑性樹脂であっても良い。
【0015】
このような管体接続構造10は、配管を行う時には、まず、嵌合凹部18又は管体16のいずれか一方に接着剤が塗布される。次に、管体16が嵌合凹部18に挿入させられていき、管体16が嵌合凹部18から抜けない程度まで圧入される。管体16が嵌合凹部18に圧入させられた状態で養生されることにより、接着剤が乾燥して管体16が嵌合凹部18に強固に固定させられる。
【0016】
このようにして一方の接続部14に管体16が接続されると、他方の接続部14にも同様にして管体16が接続される。このようにして、バルブ12の配管工事が終了する。
【0017】
この本発明に係るバルブ12及びその接続方法によれば、管継手を螺入して接続する構造ではないため、内部の水が螺入部を伝って外へ漏れる恐れがない。また、螺入部を有しないため、螺子山が変形して接続部14と管体16との間に隙間が生じてしまうことがなく、さらに、雄螺子の谷部に応力が集中して、螺子山や接続部14付近が破損してしまうことはない。
【0018】
さらに、本発明に係るバルブ12及びバルブの配管方法によれば、管体16を嵌合させて固定する構造であるため、螺子切り作業やシールテープを巻いて螺入させる必要がなく、配管工事が容易になり、作業コストを大幅に低減させることができる。また、本発明に係るバルブ12及びバルブの配管方法によれば、管継手を使用する態様ではないため、部品数及び部品同志の接触部の数が少なくなり、水漏れをなくすことができるとともに、配管工事用の資材費及び配管工事の作業工数を低減させることができる。
【0019】
以上、本発明の一実施例について説明したが、本発明に係るバルブ及びバルブの配管方法はその他の態様でも実施し得るものである。
【0020】
例えば、図3及び図4に示すようなバルブ40及びその管体接続構造42であっても良い。このバルブ40及びその管体接続構造42は、金属から成る弁体44、蓋46及び接続部48が樹脂により完全に被覆されて構成されている。弁体44は、全体に渡る樹脂体50内に金属体52が内蔵されている。また、蓋46は、全体に渡る樹脂体54内に金属体56が内蔵されている。また、接続部48は、図1に示すバルブ12の弁箱及び樹脂カバーに相当する部分と一体となって構成され、接続部48から弁箱部62及び樹脂カバー部64へ至る樹脂体58内に、弁箱部62から樹脂カバー部64へ至る金属体60が内蔵されている。
【0021】
このようなバルブ40によれば、弁体44、蓋46及び接続部48は樹脂に金属を内蔵して構成しており、金属部分が樹脂によって完全に覆われるようにされている。このため、金属部分が錆びて腐食することを防止できるため、水道水に錆が混じることがなく、配管及び水の質を維持させることができる。
【0022】
次に、図5に示す管体接続構造66を備えたバルブ67であっても良い。管体接続構造66は、樹脂カバー28と一体ではないが、弁箱26の凸部30の掛合凸部68に掛合されるようにして弁箱26に固定されている接続部70を備えて構成されている。このようなバルブ67によれば、接続部70を掛合凸部68に掛合させて弁箱26に固定することができるため、弁箱26と接続部70との接合が強固なものとなり、外力に対して耐久性が向上し、また、接合部におけるシール性が向上する。更に、バルブ67の製造が容易になり、製造コストを低減させることが可能となる。
【0023】
なお、管体接続構造66において、図6に示すように、弁箱26側に掛合凹部84を備えるとともに、接続部70側に掛合凸部86を備え、掛合凹部84と掛合凸部86との接触部に接着剤88を塗布するようにしても良い。ここで、接着剤88は、掛合凹部84と掛合凸部86との接触部を密封するためのものであり、充填剤やシール剤等を代替として使用しても良い。
【0024】
なお、管体接続構造66において、図7に示すように、掛合凹部84と掛合凸部86との接触部の中、凸部30の内周に相当する接触部90にも掛合凹部84及び掛合凸部86を備えるようにしても良い。掛合凸部86を2か所に備えることにより、弁箱26と接続部70との接続状態をより強固なものにできるとともに、2か所の接着剤88等によって密封機能をより高めることができる。また、図8に示すように、接触部90をテーパ状に構成しておいても良い。接触部90をテーパ状に構成しておくことにより、弁箱26と接続部70との接続状態をより強固なものにできる。
【0025】
また、管体接続構造66において、図9に示すように、Oリング90を代替として備えても良い。なお、Oリング90は、掛合凹部84と掛合凸部86との接触部を密封するためのものであるため、ゴム等の弾性部材から構成され、掛合凹部84と掛合凸部86とに万遍なく密着することが望ましい。さらに、掛合凹部84と掛合凸部86との接触部には、シールテープ等のシール部材を備えても良い。
【0026】
また、図10に示す管体接続構造72を備えたバルブ73であっても良い。管体接続構造72は、管体16を圧入する接続部74のみが樹脂から構成されている。このようなバルブ73によれば、構造が極めてコンパクトであるため、製造コストを低減できる。また、樹脂からなる接続部74のみを別個に成形しておいて弁箱76へ接着固定して組み立てることができるため、成形を容易にして製造工数を低減することができる。
【0027】
また、図11に示す管体接続構造78を備えたバルブ79であっても良い。管体接続構造78は、管体16を圧入する接続部80の中、管体16と接触する接触部82のみが樹脂から構成されている。このような管体接続構造78を備えたバルブ79は、略全体が金属から構成され、樹脂から構成される部分が少ないため、全体の強度を高めることができる。また、樹脂材料の材料費を低減して、全体としての製造コストを低減することができる。
【0028】
上述の各種の管体接続構造は主として弁箱と接続部との接合部における内側のシール性を高めるために採用される構造であるが、これらの構造とともに、あるいはこれらの構造に代えて、次に示す弁箱と接続部との接合部における外側のシール性を高めるための構造を採用してもよい。
【0029】
たとえば、図12(a) に示すように、金属製の弁箱84と樹脂製の接続部86とは一体的に形成されていて、その弁箱84とその弁箱84を封止する蓋88との間にリング状のシール材90を配設するのが好ましい。また、同図(b) に示すように、シール材90を配設するのにあたり、弁箱84の一部を成す接続部86から延びだす樹脂部分の表面に凹凸92を形成して、シール性を高めるように構成してもよい。さらに、同図(c) に示すように、蓋88と接触する弁箱84の一部を成す接続部86から延びだす樹脂部分にOリング94を配設することも可能である。いずれの例においても、弁箱84と蓋88との間から、あるいは弁箱84は接続部86との間から漏れだす水等を遮断することができ、シール性を高めることができる。
【0030】
さらに、図13(a) 又は(b)
に示すように、金属製の弁箱84と樹脂製の接続部86とを一体的に形成するとともに、接続部86から弁箱84に沿って円筒部96を突出させておき、この円筒部96の内面と蓋88との間にOリング94を配設するようにしてもよい。本例によれば、上述の例と同様に、弁箱84と蓋88との間から、あるいは弁箱84は接続部86との間から漏れだす水等を遮断することができ、シール性を高めることができる。
【0031】
また、同図13(c) に示すように、金属製の弁箱84と樹脂製の接続部86とを一体的に形成するのにあたり、弁箱84と接続部86との接合面98に溝等の凹凸やあやめローレット掛け等を施すことにより、シール性を高めるように構成することも可能である。
【0032】
次に、バルブの接続部において、図14に示すように、接続部14へ圧入する管体16の外周をテーパ状に構成しておいても良い。すなわち、管体16は、一端の肉厚が先端へ行くに従って僅かに薄くなるように構成されている。なお、管体16の外周の傾斜角度a2は、接続部14の内周の傾斜角度a1よりも僅かに小さく構成されている。管体接続構造10及び管体16をこのように構成することにより、管体16を接続部14へ圧入する時に、接続部14の内周に接触する管体16の先端付近を僅かに圧縮させつつ圧入することができる。このため、管体16を接続部14へ強固に固定することができる。
【0033】
以上、本発明に係るバルブ及びバルブの配管方法の実施例について、図面に基づいて種々説明したが、本発明は図示したものに限定されるものではない。
【0034】
例えば、本発明に係るバルブは、水道配管用に限定されることなく、油圧配管や空気圧配管等の他の流体の配管用のバルブであっても良い。また、本発明に係るバルブは、上述のような絞りバルブに限定はされず、ストップバルブや圧力制御バルブ等でも良い。また、接続部の嵌合掛合凹部のテーパの傾斜角度は、管体を圧入して固定できる程度であれば、特に限定はされない。
【0035】
その他、本発明はその趣旨を逸脱しない範囲で当業者の知識に基づき種々なる改良、修正、変形を加えた態様で実施できるものである。
【0036】
【発明の効果】
本発明に係るバルブによれば、従来のバルブと異なり、管継手を螺入して接続する構造ではないため、内部の水が螺入部を伝って外へ漏れる恐れがない。また、螺入部を有しないため、螺子山が変形して接続部の嵌合凹部と管体との間に隙間が生じてしまうことがない。また、螺入部を有しないため、雄螺子の谷部に応力が集中して接続部付近が破損してしまうことがない。
【0037】
さらに、本発明に係るバルブによれば、管体又は接続部に接着剤を塗布し、管体を挿入して固定する構造であるため、シールテープを巻いて螺入する必要がなく、配管工事が容易になり、作業コストを低減することができる。また、本発明に係るバルブによれば、管継手を使用する態様ではないため、部品数及び部品同志の接触部の数が少なくなり、水漏れをなくすことができるとともに、配管工事用の資材費及び配管工事の作業工数を低減することができる。
【0038】
また、本発明のバルブの配管方法によれば、バルブの接続部又は管体のいずれか一方に接着剤を塗布して、管体を接続部に挿入していき、管体を接続部に固定することができる。このため、従来のバルブの配管方法と異なり、シールテープを巻いたりして管体を螺入する必要がなく、配管工事が容易になり、作業コストを低減することができる。
【図面の簡単な説明】
【図1】 本発明に係るバルブを示す図であり、同図(a)は側面図、同図(b)は使用状態を示す要部側面断面図である。
【図2】 図1に示すバルブを示す要部正面断面図である。
【図3】 本発明に係るバルブの他の実施例を示す要部側面断面図である。
【図4】 図3に示すバルブを示す要部正面断面図である。
【図5】 本発明に係るバルブの更に他の実施例を示す要部側面断面図である。
【図6】 本発明に係るバルブの更に他の実施例を示す要部拡大側面断面図である。
【図7】 本発明に係るバルブの更に他の実施例を示す要部拡大側面断面図である。
【図8】 本発明に係るバルブの更に他の実施例を示す要部拡大側面断面図である。
【図9】 本発明に係るバルブの更に他の実施例を示す要部拡大側面断面図である。
【図10】 本発明に係るバルブの更に他の実施例を示す要部側面断面図である。
【図11】 本発明に係るバルブの更に他の実施例を示す側面断面図である。
【図12】 同図(a) 乃至(c) はいずれも本発明に係るバルブの更に他の実施例を示す要部側面断面図である。
【図13】 同図(a) 乃至(c) はいずれも本発明に係るバルブの更に他の実施例を示す要部側面断面図である。
【図14】 本発明に係るバルブの更に他の実施例を示す要部側面図である。
【図15】 従来のバルブを示す図であり、同図(a)は側面図、同図(b)は使用状態を示す要部側面断面図である。
【符号の説明】
10,42,66,72,78;管体接続構造
12,40,67,73,79;バルブ
14,58,70,74,80,86;接続部
16;管体
18;嵌合凹部
20;弁体部
24;弁体
26,84;弁箱
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a valve provided with a connecting portion for inserting and connecting one end of a tubular body, and a piping method therefor.
[0002]
[Prior art]
Conventionally, various valves are used in piping such as water supply. In order to connect these pipes to these valves, it is necessary to perform piping work. Conventionally, piping work has been performed using pipe joints.
[0003]
FIG. 15 shows a valve 1 as a conventional valve. The valve 1 is configured to control the flow rate of water by moving the valve body 3 up and down by rotating the handle 2. The connection of the pipe body 4 to the valve 1 is performed by screwing the pipe joint 6 into the connection portion 5 of the valve 1 and fitting the pipe body 4 into the pipe joint 6. Here, the pipe body 4 is fixed to the pipe joint 6 by applying an adhesive to the outer circumference of the pipe body 4 or the inner circumference of the pipe joint 6.
[0004]
[Problems to be solved by the invention]
However, when connecting with such a pipe joint 6, the male screw of the pipe joint 6 is screwed into the female screw of the connection part 5 of the valve 1, so that the internal water leaks outside through the screwed part. There was a thing. For this reason, although the sealing material is wound, the deterioration of the sealing material in long-term use, loosening due to the difference in the thermal expansion coefficient between the metal valve 1 and the resin pipe joint 6, etc. occur, There was a leak. Further, since the pipe joint 6 is often made of resin, the thread of the male screw may be deformed during screwing, and a gap may be generated in the screwed portion. Moreover, since stress concentrates on the valley portion of the male screw of the pipe joint 6, the screw thread may break at the valley portion. Furthermore, since it was necessary to wind the sealing tape around the male screw during the piping work, the piping work was difficult, resulting in increased work time and labor costs. Moreover, in order to connect the pipe body 4 to the valve 1, a pipe joint 6 must be prepared separately, which increases the number of parts and the number of work steps, resulting in an increase in cost. Further, in order to directly connect the pipe body 4 to the valve 1 without using the pipe joint 6, it is necessary to cut a screw at the end of the pipe body 4, which increases the work man-hour at the site. It was.
[0005]
Therefore, the present inventor has reached the present invention as a result of earnest research to solve such problems.
[0006]
[Means for Solving the Problems]
The gist of the valve of the present invention is a valve including a valve body portion including one or a plurality of connection portions for connecting one end of a pipe body, and a valve body and a valve box formed of at least metal. At least one of the connecting portions is formed in a cylindrical shape, and is integrally formed of a resin or rubber that covers a part or all of the portion other than the one connecting portion. . In particular, in a valve including a connecting portion that press-fits and connects one end of a tubular body, and a valve body portion that is configured by a valve body and a valve box formed of metal, the connecting portion is cylindrical. The resin cover is formed integrally with a resin cover that covers the entire valve box, and the inner surface of the valve box is covered with the resin .
[0007]
That is, in the valve of the present invention, one connection portion is made of resin or rubber, and at least the valve body portion is made of metal. Here, the type of the resin is not particularly limited as long as it has a strength that does not cause damage to the tube body and can be sealed so that water does not leak when the tube body is fitted. Contains synthetic resin. The type of rubber is not particularly limited as long as it has a strength that can fit the tube body and does not break, and can be sealed so that water does not leak when the tube body is fitted. including. In addition, the valve body portion refers to a portion including the valve body and the valve box that allows the flow rate or pressure of the fluid to be controlled by the valve body being separated from or approaching the valve box.
[0008]
In such a valve, when piping is performed, an adhesive is first applied to either the connection portion or the pipe body. Next, the tubular body is fitted into one connecting portion, and is inserted to the back so that the tubular body does not come out of the connecting portion. When the tube body is cured in a state where the tube body is fitted to the one connection portion, the adhesive is dried and the tube body is firmly fixed to the one connection portion.
[0009]
Moreover, in the valve of the present invention, at least the inner surface of the valve box is covered with resin or rubber, so that the occurrence of rust in the valve portion can be prevented. In addition, when not only the valve box but also the valve body is made of metal, it is preferable to coat the valve body with a resin or the like, but in the valve of the present invention, a valve body formed of a resin or the like is used. It is possible.
[0010]
Next, the gist of the valve piping method of the present invention is that one end of a tubular body is inserted into and connected to one cylindrical connecting portion using the valve of the present invention. Such valve piping method is a valve piping method in which one end of a pipe body is connected to one connection portion of various valves when piping is performed, and either one of the connection portion of the valve or the pipe body is connected. In this method, an adhesive is applied, the tube is inserted into the connecting portion, and the tube is fixed to the connecting portion.
[0011]
【Example】
Next, an embodiment of a valve and a valve piping method according to the present invention will be described in detail with reference to the drawings.
[0012]
1 and 2, reference numeral 12 denotes a valve according to the present invention, and reference numeral 10 denotes a tube connection structure. This pipe connection structure 10 is a pipe connection structure for connecting one end of the pipe body 16 to the connection portion 14 of the water supply valve 12 so that water (fluid) can be closed and the flow rate can be adjusted. is there. The connecting portion 14 is made of resin, and is provided with a fitting recess 18 into which one end of the tubular body 16 can be inserted. The fitting recess 18 is formed in a slightly tapered shape. In addition, taper shape means the state in which the inner periphery of the fitting recessed part 18 inclines slightly. That is, the tube connection structure 10 is a structure including the connection portion 14 and the vicinity of the connection portion 14 in the valve 12, and is a structure provided so that the tube body 16 can be press-fitted and fixed.
[0013]
Here, the valve 12 rotates the handle 22 to move the valve body 24 of the valve body portion 20 up and down to separate or approach the valve box 26. The flow rate of the water flowing through the gap can be controlled. Here, FIG. 1 shows a state where the valve body 24 is lowered to the maximum and the flow of water is closed, and FIG. 2 shows a state where the valve body 24 is raised to the maximum and the flow rate of water is maximum. Show. The valve body 24 and the valve box 26 are made of a bronze casting so that when the valve body 24 is brought into close contact with the valve box 26, the valve body 24 or the valve box 26 is distorted so that water does not leak. ing. Here, the material of the valve body 24 and the valve box 26 is not limited to bronze casting, and may be other metals such as cast iron, stainless steel, forged steel, cast steel, and the like. The valve 12 shown in FIGS. 1 and 2 includes two connecting portions 14 and both connecting portions 14 are made of resin. However, only one connecting portion 14 may be made of resin. .
[0014]
The connecting portion 14 is integrated with a resin cover 28 that covers the entire lower portion of the valve 12, and is fixed so as to be fitted to the convex portion 30 of the valve box 26. The material of the connecting portion 14 is not particularly limited as long as the tube body 16 can be press-fitted and has a strength that does not break, and can be sealed so that water does not leak when the tube body 16 is press-fitted. Rigid vinyl chloride is usually used. In particular, impact-resistant hard vinyl chloride or heat-resistant hard vinyl chloride is preferable. Vinyl chloride is a thermoplastic resin, but may be a thermoplastic resin such as polyethylene and polypropylene as long as it has a strength comparable to or higher than that of vinyl chloride.
[0015]
In such a tube connection structure 10, when piping is performed, an adhesive is first applied to either the fitting recess 18 or the tube 16. Next, the tube body 16 is inserted into the fitting recess 18, and the tube body 16 is press-fitted to the extent that it does not come out of the fitting recess 18. When the tube body 16 is cured while being pressed into the fitting recess 18, the adhesive is dried and the tube body 16 is firmly fixed to the fitting recess 18.
[0016]
When the tube body 16 is connected to one connection portion 14 in this way, the tube body 16 is similarly connected to the other connection portion 14. In this way, the piping work for the valve 12 is completed.
[0017]
According to the valve 12 and the connection method thereof according to the present invention, since the pipe joint is not screwed and connected, there is no possibility that water inside leaks outside through the screwed portion. In addition, since there is no threaded portion, the thread is not deformed and a gap is not formed between the connecting portion 14 and the tube body 16, and stress is concentrated in the valley portion of the male thread. The mountain and the vicinity of the connecting portion 14 are not damaged.
[0018]
Furthermore, according to the valve 12 and the valve piping method according to the present invention, since the pipe body 16 is fitted and fixed, there is no need for screw cutting work or winding a seal tape and screwing. Can be facilitated, and the working cost can be greatly reduced. In addition, according to the valve 12 and the valve piping method according to the present invention, since it is not an aspect of using a pipe joint, the number of parts and the number of contact parts between the parts can be reduced, and water leakage can be eliminated. It is possible to reduce the material cost for piping work and the work man-hours for piping work.
[0019]
As mentioned above, although one Example of this invention was described, the valve and the piping method of a valve concerning this invention can be implemented also in another aspect.
[0020]
For example, the valve 40 and its tube connecting structure 42 as shown in FIGS. 3 and 4 may be used. The valve 40 and its pipe connection structure 42 are configured by completely covering a valve body 44 made of metal, a lid 46 and a connection portion 48 with a resin. The valve body 44 has a metal body 52 built in a resin body 50 throughout. Further, the lid 46 has a metal body 56 built in a resin body 54 over the whole. Further, the connecting portion 48 is configured integrally with portions corresponding to the valve box and the resin cover of the valve 12 shown in FIG. 1, and the inside of the resin body 58 extending from the connecting portion 48 to the valve box portion 62 and the resin cover portion 64. Further, a metal body 60 from the valve box portion 62 to the resin cover portion 64 is incorporated.
[0021]
According to such a valve 40, the valve body 44, the lid 46, and the connection portion 48 are configured by incorporating a metal in resin, and the metal portion is completely covered with the resin. For this reason, since it can prevent that a metal part rusts and corrodes, rust is not mixed in tap water, but the quality of piping and water can be maintained.
[0022]
Next, the valve 67 provided with the tubular body connection structure 66 shown in FIG. 5 may be used. The tube connection structure 66 is not integrated with the resin cover 28, but includes a connection portion 70 that is fixed to the valve box 26 so as to be engaged with the engagement protrusion 68 of the protrusion 30 of the valve box 26. Has been. According to such a valve 67, since the connection part 70 can be engaged with the engagement convex part 68 and fixed to the valve box 26, the joint between the valve box 26 and the connection part 70 becomes strong, and external force is reduced. On the other hand, the durability is improved and the sealing performance at the joint is improved. Further, the manufacturing of the valve 67 is facilitated, and the manufacturing cost can be reduced.
[0023]
In addition, as shown in FIG. 6, the tube connection structure 66 includes a latching recess 84 on the valve box 26 side and a latching convex portion 86 on the connection portion 70 side, and the latching recess 84 and the latching convex portion 86. You may make it apply | coat the adhesive agent 88 to a contact part. Here, the adhesive 88 is for sealing the contact portion between the engaging concave portion 84 and the engaging convex portion 86, and a filler, a sealing agent, or the like may be used as an alternative.
[0024]
In the tubular body connection structure 66, as shown in FIG. 7, the engagement recess 84 and the engagement also in the contact portion 90 corresponding to the inner periphery of the protrusion 30 in the contact portion between the engagement recess 84 and the engagement protrusion 86. You may make it provide the convex part 86. FIG. By providing the hooking projections 86 at two locations, the connection state between the valve box 26 and the connection portion 70 can be made stronger, and the sealing function can be further enhanced by the adhesives 88 and the like at two locations. . Moreover, as shown in FIG. 8, the contact part 90 may be configured in a tapered shape. By configuring the contact portion 90 in a tapered shape, the connection state between the valve box 26 and the connection portion 70 can be made stronger.
[0025]
Further, in the tube connection structure 66, as shown in FIG. 9, an O-ring 90 may be provided as an alternative. The O-ring 90 is for sealing the contact portion between the hooking recess 84 and the hooking projection 86, and is therefore composed of an elastic member such as rubber. The O-ring 90 is universally formed between the hooking recess 84 and the hooking projection 86. It is desirable to adhere closely. Furthermore, a sealing member such as a sealing tape may be provided at the contact portion between the engaging concave portion 84 and the engaging convex portion 86.
[0026]
Moreover, the valve | bulb 73 provided with the tubular body connection structure 72 shown in FIG. 10 may be sufficient. In the tube connection structure 72, only the connection portion 74 for press-fitting the tube 16 is made of resin. According to such a valve 73, since the structure is extremely compact, the manufacturing cost can be reduced. Further, since only the connecting portion 74 made of resin can be separately molded and bonded and fixed to the valve box 76, the molding can be facilitated and the number of manufacturing steps can be reduced.
[0027]
Moreover, the valve 79 provided with the tube connection structure 78 shown in FIG. 11 may be sufficient. In the tube connection structure 78, only the contact portion 82 that comes into contact with the tube body 16 out of the connection portion 80 for press-fitting the tube body 16 is made of resin. Since the valve 79 provided with such a tube connection structure 78 is substantially entirely made of metal and has few portions made of resin, the overall strength can be increased. Moreover, the material cost of a resin material can be reduced, and the manufacturing cost as a whole can be reduced.
[0028]
The various pipe connection structures described above are structures that are mainly employed to improve the inner sealing performance at the joint between the valve box and the connection part, but together with these structures or instead of these structures, The structure for improving the sealing performance of the outer side in the junction part of the valve box shown in FIG.
[0029]
For example, as shown in FIG. 12 (a), the metal valve box 84 and the resin connecting portion 86 are integrally formed, and the valve box 84 and a lid 88 for sealing the valve box 84 are sealed. A ring-shaped sealing material 90 is preferably disposed between the two. Further, as shown in FIG. 5B, when the sealing material 90 is disposed, the unevenness 92 is formed on the surface of the resin portion extending from the connecting portion 86 forming a part of the valve box 84, thereby providing a sealing property. You may comprise so that it may raise. Further, as shown in FIG. 3C, an O-ring 94 can be provided in a resin portion extending from a connecting portion 86 that forms part of the valve box 84 that contacts the lid 88. In any example, the water leaking from between the valve box 84 and the lid 88 or from the connection part 86 can be shut off from the valve box 84, and the sealing performance can be improved.
[0030]
Further, FIG. 13 (a) or (b)
As shown, the metal valve box 84 and the resin connection part 86 are integrally formed, and a cylindrical part 96 is projected from the connection part 86 along the valve box 84. An O-ring 94 may be disposed between the inner surface of the cover and the cover 88. According to this example, similarly to the above-described example, water leaking from between the valve box 84 and the lid 88 or from the connection part 86 can be shut off from the valve box 84, and the sealing performance can be improved. Can be increased.
[0031]
Further, as shown in FIG. 13 (c), when the metal valve box 84 and the resin connecting portion 86 are integrally formed, a groove is formed in the joint surface 98 between the valve box 84 and the connecting portion 86. It is also possible to configure so as to enhance the sealing property by applying unevenness such as unevenness or knurls.
[0032]
Next, as shown in FIG. 14, in the connection portion of the valve, the outer periphery of the tube body 16 that is press-fitted into the connection portion 14 may be configured in a tapered shape. That is, the tube body 16 is configured such that the thickness at one end becomes slightly thinner toward the tip. In addition, the inclination angle a2 of the outer periphery of the tubular body 16 is configured to be slightly smaller than the inclination angle a1 of the inner periphery of the connecting portion 14. By configuring the tube connection structure 10 and the tube body 16 in this way, when the tube body 16 is press-fitted into the connection portion 14, the vicinity of the tip end of the tube body 16 that contacts the inner periphery of the connection portion 14 is slightly compressed. It can be press-fitted while. For this reason, the tubular body 16 can be firmly fixed to the connecting portion 14.
[0033]
As mentioned above, although the Example of the valve | bulb which concerns on this invention and the piping method of a valve was variously demonstrated based on drawing, this invention is not limited to what was illustrated.
[0034]
For example, the valve according to the present invention is not limited to water supply piping, and may be a valve for piping of other fluids such as hydraulic piping and pneumatic piping. The valve according to the present invention is not limited to the throttle valve as described above, and may be a stop valve, a pressure control valve, or the like. In addition, the inclination angle of the taper of the fitting engagement concave portion of the connecting portion is not particularly limited as long as the tubular body can be press-fitted and fixed.
[0035]
In addition, the present invention can be implemented in a mode in which various improvements, modifications, and variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention.
[0036]
【The invention's effect】
Unlike the conventional valve, the valve according to the present invention does not have a structure in which a pipe joint is screwed and connected, so that there is no possibility that water inside leaks outside through the screwed portion. Moreover, since there is no screwing part, a screw thread does not deform | transform and a clearance gap will not arise between the fitting recessed part of a connection part, and a pipe body. Moreover, since there is no screwing part, stress concentrates on the valley part of a male screw, and the connection part vicinity is not damaged.
[0037]
Furthermore, the valve according to the present invention has a structure in which an adhesive is applied to the pipe body or the connection portion, and the pipe body is inserted and fixed. Can be reduced and the operation cost can be reduced. In addition, according to the valve of the present invention, since it is not an aspect of using a pipe joint, the number of parts and the number of contact parts between parts can be reduced, water leakage can be eliminated, and material costs for piping work can be eliminated. In addition, the work man-hours for piping work can be reduced.
[0038]
Further, according to the valve piping method of the present invention, the adhesive is applied to either the valve connection portion or the tube body, the tube body is inserted into the connection portion, and the tube body is fixed to the connection portion. can do. For this reason, unlike the conventional valve piping method, it is not necessary to wind a sealing tape or screw the tube body, piping work is facilitated, and operation costs can be reduced.
[Brief description of the drawings]
FIG. 1 is a view showing a valve according to the present invention, in which FIG. 1 (a) is a side view, and FIG. 1 (b) is a side sectional view of an essential part showing a use state.
FIG. 2 is a front sectional view of a main part showing the valve shown in FIG. 1;
FIG. 3 is a side sectional view of an essential part showing another embodiment of the valve according to the present invention.
4 is a front cross-sectional view of a main part showing the valve shown in FIG. 3. FIG.
FIG. 5 is a side sectional view of an essential part showing still another embodiment of the valve according to the present invention.
FIG. 6 is an enlarged side cross-sectional view of a main part showing still another embodiment of the valve according to the present invention.
FIG. 7 is an enlarged side cross-sectional view of a main part showing still another embodiment of the valve according to the present invention.
FIG. 8 is an enlarged side sectional view of a main part showing still another embodiment of the valve according to the present invention.
FIG. 9 is an enlarged side cross-sectional view of a main part showing still another embodiment of the valve according to the present invention.
FIG. 10 is a side sectional view of an essential part showing still another embodiment of the valve according to the present invention.
FIG. 11 is a side sectional view showing still another embodiment of the valve according to the present invention.
FIGS. 12 (a) to 12 (c) are side cross-sectional views of the main part showing still another embodiment of the valve according to the present invention.
FIGS. 13 (a) to 13 (c) are side cross-sectional views of a main part showing still another embodiment of the valve according to the present invention.
FIG. 14 is a side view of an essential part showing still another embodiment of the valve according to the present invention.
15A and 15B are diagrams showing a conventional valve, in which FIG. 15A is a side view, and FIG. 15B is a side cross-sectional view of a main part showing a use state.
[Explanation of symbols]
10, 42, 66, 72, 78; tube connecting structure 12, 40, 67, 73, 79; valve 14, 58, 70, 74, 80, 86; connection 16; tube 18; fitting recess 20; Valve body 24; valve body 26, 84; valve box

Claims (1)

内周が傾斜した嵌合凹部を有し、管体の一端を圧入して接続する接続部と、
弁体及び金属にて形成された弁箱から構成された弁体部と、
を備えたバルブにおいて、
前記接続部が、筒状に形成されるとともに、前記弁箱全部を被覆する樹脂カバーと一体的に樹脂から形成され、
前記弁箱の内面が、前記樹脂により被覆されていることを特徴とするバルブ。
A connecting recess having a fitting recess with an inclined inner periphery, and press-fitting and connecting one end of the tube;
A valve body portion composed of a valve body and a valve box formed of metal;
In a valve with
The connecting portion is formed in a cylindrical shape, and is integrally formed with a resin cover that covers the entire valve box,
An inner surface of the valve box is covered with the resin .
JP15274196A 1996-06-13 1996-06-13 Valve and piping method thereof Expired - Lifetime JP4017026B2 (en)

Priority Applications (2)

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JP15274196A JP4017026B2 (en) 1996-06-13 1996-06-13 Valve and piping method thereof
PCT/JP1997/004617 WO1999031418A1 (en) 1996-06-13 1997-12-15 Valve and piping therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP15274196A JP4017026B2 (en) 1996-06-13 1996-06-13 Valve and piping method thereof
PCT/JP1997/004617 WO1999031418A1 (en) 1996-06-13 1997-12-15 Valve and piping therefor

Publications (2)

Publication Number Publication Date
JPH102441A JPH102441A (en) 1998-01-06
JP4017026B2 true JP4017026B2 (en) 2007-12-05

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JPH084929A (en) * 1994-06-17 1996-01-12 Sekisui Chem Co Ltd Valve
JPH0882375A (en) * 1994-09-12 1996-03-26 Kitz Corp Valve
JPH09222178A (en) * 1996-02-19 1997-08-26 Kitz Corp Valve with electric welding coupler

Also Published As

Publication number Publication date
JPH102441A (en) 1998-01-06
WO1999031418A1 (en) 1999-06-24

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