JP3647719B2 - Pipe connection structure of valve device - Google Patents

Pipe connection structure of valve device Download PDF

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Publication number
JP3647719B2
JP3647719B2 JP2000141790A JP2000141790A JP3647719B2 JP 3647719 B2 JP3647719 B2 JP 3647719B2 JP 2000141790 A JP2000141790 A JP 2000141790A JP 2000141790 A JP2000141790 A JP 2000141790A JP 3647719 B2 JP3647719 B2 JP 3647719B2
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pipe
packing
connection
valve device
diameter
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JP2001324069A (en
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安夫 原
秀敏 岡田
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Hoshizaki Electric Co Ltd
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Hoshizaki Electric Co Ltd
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Description

【0001】
【発明の属する技術分野】
この発明は、弁装置の管接続構造に関し、更に詳細には、弁装置の接続管とパイプとをパッキンを介して液密的に接続する弁装置の管接続構造に関するものである。
【0002】
【従来の技術】
水道の如き外部給水系から水の供給を受け、その水を費消して所要の用途に供する装置として、洗浄機や製氷機等が挙げられる。これらの装置では、水道水を供給する給水パイプと、装置内部の所定部位に水道水を供給する配水管とを弁装置としての電磁弁を介して接続し、該電磁弁の弁作用下に必要量の水道水を所定部位に供給するよう構成されている。この電磁弁と給水パイプとの接続は、例えば図7に示す構造となっている。すなわち、電磁弁における入口側の接続管10には、その外周に雄ネジ12が螺設されると共に、内部には開口端10aから所定深さで大径凹部14が形成されている。これに対して給水パイプ16における接続管10の開口端10aと対向する端部外周に、外径方向に延出する外側フランジ18が全周に亘って形成されると共に、接続管10の雄ネジ12と螺合可能な雌ネジ20を内周に螺設したユニオンナット22が外装されている。このユニオンナット22は、軸方向一端部に内側フランジ22aが形成されると共にその中央部には、前記給水パイプ16の挿通は許容するが外側フランジ18の挿通は阻止する通孔22bが穿設してある。そしてこのユニオンナット22は、その全面開放している開口部側(内側フランジ22aが形成される側とは反対側)を、前記接続管10の開口端側に一致させると共に、内側フランジ22aが外側フランジ18に対して接続管10から離間する面に当接可能な状態で給水パイプ16に外装してある。
【0003】
前述した構造において電磁弁の接続管10と給水パイプ16とを接続する場合は、接続管10の開口端10aと給水パイプ16の開口端16aとを、リング状のパッキン24を挟んで突合わせた状態で、前記ユニオンナット22を接続管10にねじ込むことで、接続管10および給水パイプ16の開口端10a,16aがパッキン24に圧接されて液密的に連通接続される。
【0004】
なお、前述した各種装置に供給される水は、異物その他の挟雑物が混入していないことが要請され、そのために前記接続管10の内部に異物濾去用のフィルタ26が挿入配置される。このフィルタ26は、前記大径凹部14の内径より小さなドーム状に形成された本体26aの開放端部に、大径凹部14の内径より大きな弾性部26bを折曲形成してある。そして、弾性部26bが大径凹部14の内周面に弾力的に当接した状態で、大径凹部14の奥側の段部28に開放端が当接する位置までフィルタ26を押込むことで、該フィルタ26は大径凹部14の定位置に配置されるようになっている。
【0005】
【発明が解決しようとする課題】
前述した電磁弁の管接続構造では、リング状のパッキン24を接続管10の開口端10aと給水パイプ16の開口端16aとの間に位置決めするに際し、該パッキン24の径方向への位置ズレを規制する部材がないため、該パッキン24を接続管10と給水パイプ16との間の適正位置に保持するのが難しく、径方向に位置ズレした状態で接続されてしまうことがある。また、ユニオンナット22を接続管10にねじ込んで該接続管10と給水パイプ16とをパッキン24に圧接するまでは、該パッキン24がズレ易く、ユニオンナット22のねじ込み時に位置ズレしてしまう場合がある。このように、パッキン24が適正位置からズレると、接続管10の開口端10aとパッキン24との当接部分が少なくなり、水漏れが生じ易くなる。またパッキン24が大きくズレてしまうと、接続管10の開口端10aにパッキン24が当接しない部分を生じ、その部分から水漏れする問題を招く。
【0006】
すなわち、前記接続管10と給水パイプ16との接続作業に際しては、前記パッキン24が位置ズレしないように注意して作業を行なわなければならず、接続作業に時間が掛かると共に煩雑であった。
【0007】
また、前記接続管10と給水パイプ16との接続作業に際して、給水パイプ16が接続管10に対して径方向に位置ズレすると、両者10,16の間でのパッキン24の挟持が不完全となり、水漏れを起こし易くなる難点が指摘される。なお、前記フィルタ26は、接続管10における大径凹部14の奥側に押込まれると共に、前記弾性部26bが大径凹部14の内周面に圧接されているため、該接続管10の開口部側から簡単に取出して掃除することができなかった。
【0008】
【発明の目的】
本発明は、従来の技術に係る弁装置の管接続構造に内在している前記欠点を好適に解決するべく提案されたものであって、パッキンの位置ズレを防止して確実な液密状態とし得ると共に、パイプの位置ズレ防止およびフィルタの取外しの容易化を図り得る弁装置の管接続構造を提供することを目的とする。
【0009】
【課題を解決するための手段】
前記課題を解決し、所期の目的を達成するため、本発明に係る弁装置の管接続構造は、
弁装置における接続管の開口端にパッキンを介してパイプの開口端を突合わせた状態で、該接続管とパイプとを接続手段により接続する管接続構造であって、
前記接続管の開口端から所定深さで内部に形成された大径凹部に補助管の本体部が挿脱可能に挿入され、
前記本体部前記パイプを指向する端部に、該本体部より小径で、前記接続管の開口端から所定長さで突出する位置決め突部が突設され、
該位置決め突部に外嵌された前記パッキンを介して前記接続管の開口端とパイプの開口端とが突合わされると共に
前記本体部の軸長が、前記大径凹部の深さより所定長さ短かく設定されて、該本体部を大径凹部に挿入配置したときに、本体部における位置決め突部より外側の端部が、前記接続管の開口端より内側に位置して、該端部と前記パッキンとの対向部に所要の隙間が画成されるよう構成したことを特徴とする。
【0010】
【発明の実施の形態】
次に、本発明に係る弁装置の管接続構造につき、好適な実施例を挙げて、添付図面を参照しながら以下説明する。なお、図7を参照して従来の技術で説明した同一部材には、同じ符号を付して、詳細説明は省略する。
【0011】
図1〜図3は、好適な実施例に係る管接続構造を示すものであって、弁装置としての電磁弁における入口側の接続管10に、給水パイプ(パイプ)16が接続手段を介して液密的に接続されるようになっている。この接続手段は、接続管10の外周に螺設した雄ネジ12と、給水パイプ16に外装されたユニオンナット22とから構成され、該ユニオンナット22の雌ネジ20を接続管10の雄ネジ12に螺合することで、接続管10と給水パイプ16とが連通接続されることは、前述した通りである。
【0012】
前記接続管10に形成した大径凹部14には、筒状の補助管30が挿脱可能に挿入されている。この補助管30は、大径凹部14の内径より僅かに小径に設定されて、該大径凹部14に対して開口部側から挿脱可能な筒状の本体部30aを備え、該本体部30aの挿入端部を大径凹部14の段部28に当接することで位置決めされるようになっている。この本体部30aの軸長は、大径凹部14の深さと略同一に設定されており、該本体部30aの給水パイプ16を指向する端部には、本体部30aより小径の筒状突部(位置決め突部)32が、接続管10の開口端10aから外方に所定長さだけ突出するよう突設してある。なお、補助管30を大径凹部14に挿入配置した状態で、筒状突部32と接続管10との軸心が略一致するようになっている。また、実施例の筒状突部32の長さ寸法は、前記リング状のパッキン24の厚みと略同一に設定される。
【0013】
前記筒状突部32の外径は、前記パッキン24の内径より僅かに小径に設定され、該筒状突部32にパッキン24を外嵌することで、該パッキン24の径方向の位置決めがなされるよう構成される。すなわち、パッキン24を筒状突部32に外嵌した状態で、図1に示す如く、前記接続管10における開口端10aの全面が、該パッキン24の対向する面に当接するようになっている。なお、パッキン24を挟んで接続管10と給水パイプ16とを突合わせて接続する際には、該パイプ16が筒状突部32の端部とは干渉しないよう設定されている。
【0014】
前記補助管30における本体部30aの内部には、前述したと同様の異物濾去用のフィルタ26が挿入配置される。このフィルタ26は、本体部30aの内径より小さなドーム状に形成された本体26aの開放端部に、本体部30aの内径より大きな弾性部26bを折曲形成したものであって、弾性部26bが本体部30aの内周面に弾力的に当接した状態で、該本体部30aにおける大径凹部14への挿入端部側に挿入配置されている。なお、補助管30を接続管10の大径凹部14に挿入したときに、前記フィルタ26における開放端部が前記段部28に当接し、該フィルタ26の移動が規制されるようになっている。ちなみにフィルタ26は、ステンレス材を網状に成形したものである。
【0015】
【実施例の作用】
次に、実施例に係る電磁弁の管接続構造の作用につき説明する。電磁弁の接続管10に給水パイプ16を接続するに際しては、先ず前記補助管30における本体部30aの内部に、前記フィルタ26を弾力的に挿入配置する。この補助管30を、接続管10の大径凹部14に挿入し、該凹部14の奥側の段部28に本体部30aの挿入端部を当接して位置決めする。このとき、前記フィルタ26における開放端部も段部28に当接し、該フィルタ26の移動は規制される。
【0016】
前記補助管30の筒状突部32は、接続管10の開口端10aから所定長さだけ突出しており、この筒状突部32に前記パッキン24を外嵌することで、接続管10の開口端10aに対するパッキン24の位置決めがなされる。次いで、パッキン24における接続管10の開口端10aが当接する面とは反対側の面に、前記給水パイプ16の開口端16aを当接した状態で、前記ユニオンナット22を接続管10にねじ込む。これにより、接続管10の開口端10aと給水パイプ16の開口端16aとがパッキン24に圧接され、両者10,16は液密的に連通接続される。
【0017】
前記パッキン24は、補助管30の筒状突部32に外嵌することで径方向の位置決めがなされるから、接続作業に際して径方向に位置ズレすることはなく、接続管10と給水パイプ16との間の適正位置に保持される。また、ユニオンナット22の接続管10へのねじ込みに際してもパッキン24が位置ズレすることはなく、従って接続管10と給水パイプ16との接続部に水漏れが発生するのを好適に防止し得る。しかも、パッキン24が位置ズレするのを注意しつつ接続作業を行なう必要はないから作業性が良く、該接続作業を短時間で簡単に行なうことができる。更に、前記フィルタ26は補助管30に挿入配置されているから、給水パイプ16を取外した接続管10から補助管30を取出すことで、該補助管30およびフィルタ26の掃除を簡単に行ない得る。
【0018】
【変更例】
図4〜6は、管接続構造の変更例を示すものであって、基本的な構成は前述した実施例と同一であるので、異なる部分についてのみ説明する。すなわち、図4に示す第1の変更例に係る補助管30では、その本体部30aの軸長が、大径凹部14の深さより所定長さだけ短かく設定され、該大径凹部14に本体部30aを挿入配置したときに、本体部30aにおける筒状突部32より外側の端部30bが、接続管10の開口端10aより内側(大径凹部14の内側)に位置するよう設定される。これにより、該端部30bと前記パッキン24との対向部に所要の隙間38が画成され、該パッキン24は接続管10の開口端10aと給水パイプ16の開口端16aとに確実に圧接されるようになっている。すなわち、補助管30、接続管10およびフィルタ26等の寸法誤差、あるいはフィルタ26の取付け位置のズレ等によっても、前記本体部30aの端部30bが接続管10の開口端10aより外方に突出することはなく、パッキン24による確実な液密性が確保される。なお、第1の変更例における筒状突部32の長さ寸法は、前記隙間38分だけパッキン24の厚みよりも長くなっている。
【0019】
次に、図5に示す第2の変更例に係る補助管30では、前記給水パイプ16側の入口側内径部40(フィルタ26が挿入配置される部分を臨く部位)の内径を、該給水パイプ16の内径に対して所定長さだけ小さく設定してある。これにより、給水パイプ16から接続管10へ供給される水の流量を減少し得るようになっている。すなわち、接続管10に対して、入口側内径部40の内径が異なる補助管30を選択して挿入配置することで、接続管10に供給される水の流量を調節することが可能となる。
【0020】
更に、図6に示す第3の変更例の補助管34では、該補助管34の本体部34aを接続管10の大径凹部14に挿入配置した状態で、本体部34aの端部に突設した筒状突部(位置決め突部)36の突出寸法が、前記パッキン24の厚みより長くなるよう設定される。また筒状突部36の外径は、前記給水パイプ16の内径より僅かに小さく設定されており、パッキン24から突出する筒状突部36の先端部が該給水パイプ16に挿入されるよう構成してある。
【0021】
前記第3の変更例においては、前記接続管10の大径凹部14に挿入配置した補助管34の筒状突部36にパッキン24を外嵌した後、前記給水パイプ16を筒状突部36の先端部が挿入されるように接続管10に対向することで、該接続管10に対して給水パイプ16が適正位置に保持される。従って、接続管10と給水パイプ16とでパッキン24を確実に挟持することができ、挟持が不完全となることでの水漏れの発生を未然に防止し得る。
【0022】
なお第3の変更例では、図6に示す如く、前記フィルタ26を大径凹部14の内部に挿入配置する構成とし、補助管34の挿入端部をフィルタ26の弾性部26bに当接することで該補助管34の位置決めを行なうようにしたが、前述した実施例と同様に補助管34における本体部34aの内部にフィルタ26を挿入配置してもよい。また各変更例の構成は、これを単独で採用する他に、2つの構成を適宜に組合わせたり全ての構成を採用することが可能である。
【0023】
実施例では、位置決め突部として筒状に形成されたものの場合で説明したが、本願はこれに限定されるものでなく、パッキンの径方向への位置ズレを規制し得るものであれば、例えば補助管の周方向に離間して突設した複数の突片から構成されるものであってもよい。また実施例では、電磁弁の入口側の接続管と給水パイプとを接続する場合で説明したが、出口側の接続管と配水管(パイプ)との接続に関しても同一の構造を採用することができる。更に弁装置としては、電磁弁に限らず他の型式の弁であってもよい。なお、弁装置により供給制御される液体は、水以外にジュースや他の飲料であってもよい。
【0024】
【発明の効果】
以上に説明した如く、本発明に係る弁装置の管接続構造によれば、接続管に挿入配置した補助管の位置決め突部にパッキンを外嵌して位置決めするよう構成したので、接続作業中にパッキンが位置ズレするのを防止し、該接続部から液漏れが発生するのを未然に防ぐことができる。また、パッキンが位置ズレするのを注意しながら接続作業を行なう必要がないから、該作業を短時間で簡単に行ない得る利点がある。更に、補助管における位置決め突部より外側の端部とパッキンとの対向部に所要の隙間を画成するよう設定したことで、接続管の開口端とパイプの開口端とにパッキンを確実に圧接することができ、より確実な液密性を確保し得る。
【0025】
前記補助管の位置決め突部をパイプに挿入するよう構成したことで、接続管に対してパイプが径方向へ位置ズレするのを防止することができ、パッキンの挟持が不完全となることでの液漏れの発生を未然に防ぐことができる。また、補助管にフィルタを挿入配置することで、補助管と共にフィルタを接続管から簡単に取出して掃除することが可能となる。なお、補助管の内径を、パイプの内径と異なるよう設定することで、流量調節が可能である。
【図面の簡単な説明】
【図1】 本発明の好適な実施例に係る管接続構造を示す縦断側面図である。
【図2】 実施例に係る管接続構造における補助管とパッキンおよびフィルタを一部切欠いて示す分解側面図である。
【図3】 実施例に係る管接続構造における補助管とパッキンおよびフィルタの分解斜視図である。
【図4】 第1の変更例に係る管接続構造を示す縦断側面図である。
【図5】 第2の変更例に係る管接続構造を示す縦断側面図である。
【図6】 第3の変更例に係る管接続構造を示す縦断側面図である。
【図7】 従来の技術に係る管接続構造を示す縦断側面図である。
【符号の説明】
10 接続管,10a 開口端,14 大径凹部,16 給水パイプ(パイプ)
16a 開口端,24 パッキン,26 フィルタ,30 補助管,30b 端部
32 筒状突部(位置決め突部),34 補助管,36 筒状突部(位置決め突部)
38 隙間
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe connection structure of a valve device, and more particularly to a pipe connection structure of a valve device that connects a connection pipe and a pipe of a valve device in a fluid-tight manner via a packing.
[0002]
[Prior art]
Examples of apparatuses that receive water supply from an external water supply system such as a water supply and consume the water for a required application include a washing machine and an ice making machine. In these devices, a water supply pipe that supplies tap water and a water pipe that supplies tap water to a predetermined part inside the device are connected via a solenoid valve as a valve device, and are necessary under the valve action of the solenoid valve. An amount of tap water is configured to be supplied to a predetermined site. The connection between the electromagnetic valve and the water supply pipe has a structure shown in FIG. 7, for example. That is, the male pipe 12 is screwed on the outer periphery of the connection pipe 10 on the inlet side of the solenoid valve, and the large-diameter recess 14 is formed at a predetermined depth from the opening end 10a. On the other hand, an outer flange 18 extending in the outer diameter direction is formed on the outer periphery of the end portion of the water supply pipe 16 facing the opening end 10a of the connection pipe 10 over the entire circumference. A union nut 22 in which a female screw 20 that can be screwed with the screw 12 is screwed on the inner periphery is externally provided. The union nut 22 is formed with an inner flange 22a at one end in the axial direction, and a through hole 22b that allows the water supply pipe 16 to be inserted but prevents the outer flange 18 from being inserted in the center thereof. It is. The union nut 22 has its open side (the side opposite to the side on which the inner flange 22a is formed) aligned with the opening end side of the connecting pipe 10, and the inner flange 22a is on the outer side. The water supply pipe 16 is covered with the flange 18 so as to be able to come into contact with a surface separated from the connection pipe 10.
[0003]
When the connection pipe 10 of the solenoid valve and the water supply pipe 16 are connected in the structure described above, the opening end 10a of the connection pipe 10 and the opening end 16a of the water supply pipe 16 are abutted with a ring-shaped packing 24 interposed therebetween. In this state, the union nut 22 is screwed into the connecting pipe 10, so that the connecting pipe 10 and the open ends 10 a and 16 a of the water supply pipe 16 are pressed against the packing 24 and are fluidly connected.
[0004]
Note that the water supplied to the various devices described above is required to be free of foreign matter and other contaminants. For this reason, a filter 26 for removing foreign matter is inserted into the connection pipe 10. . In the filter 26, an elastic portion 26b larger than the inner diameter of the large-diameter concave portion 14 is bent at the open end of the main body 26a formed in a dome shape smaller than the inner diameter of the large-diameter concave portion 14. Then, the filter 26 is pushed into a position where the open end abuts the stepped portion 28 on the back side of the large-diameter concave portion 14 in a state where the elastic portion 26b elastically contacts the inner peripheral surface of the large-diameter concave portion 14. The filter 26 is arranged at a fixed position of the large-diameter recess 14.
[0005]
[Problems to be solved by the invention]
In the above-described solenoid valve pipe connection structure, when the ring-shaped packing 24 is positioned between the opening end 10a of the connection pipe 10 and the opening end 16a of the water supply pipe 16, the radial displacement of the packing 24 is shifted. Since there is no member to regulate, it is difficult to hold the packing 24 at an appropriate position between the connecting pipe 10 and the water supply pipe 16, and the gasket 24 may be connected in a state of being displaced in the radial direction. Further, until the union nut 22 is screwed into the connecting pipe 10 and the connecting pipe 10 and the water supply pipe 16 are pressed against the packing 24, the packing 24 is easily displaced, and the union nut 22 may be displaced when the union nut 22 is screwed. is there. Thus, if the packing 24 shifts | deviates from an appropriate position, the contact part of the opening end 10a of the connection pipe 10 and the packing 24 will decrease, and it will become easy to produce a water leak. Further, if the packing 24 is greatly displaced, a portion where the packing 24 does not come into contact with the opening end 10a of the connecting pipe 10 is generated, and there is a problem that water leaks from the portion.
[0006]
That is, when connecting the connecting pipe 10 and the water supply pipe 16, the work must be performed with care so that the packing 24 is not misaligned, which takes time and is complicated.
[0007]
Further, when the connection pipe 10 and the water supply pipe 16 are connected, if the water supply pipe 16 is displaced in the radial direction with respect to the connection pipe 10, the sandwiching of the packing 24 between the both 10 and 16 becomes incomplete, It is pointed out that it is easy to cause water leakage. The filter 26 is pushed into the deep side of the large-diameter recess 14 in the connection pipe 10 and the elastic part 26b is pressed against the inner peripheral surface of the large-diameter recess 14. I could not easily remove it from the department side and clean it.
[0008]
OBJECT OF THE INVENTION
The present invention has been proposed in order to suitably solve the above-mentioned drawbacks inherent in the pipe connection structure of a valve device according to the prior art, and prevents a positional deviation of the packing to provide a reliable liquid-tight state. It is another object of the present invention to provide a pipe connection structure for a valve device that can prevent the displacement of a pipe and facilitate the removal of a filter.
[0009]
[Means for Solving the Problems]
In order to solve the above problems and achieve the intended purpose, the pipe connection structure of the valve device according to the present invention includes:
A pipe connection structure for connecting the connection pipe and the pipe by connection means in a state where the open end of the pipe is abutted with the opening end of the connection pipe in the valve device via a packing,
The main body portion of the auxiliary pipe is detachably inserted into the large-diameter recess formed inside at a predetermined depth from the opening end of the connection pipe,
The end directed to the pipe of the main body portion, smaller in diameter than the body portion, the positioning projection which projects a predetermined length from the opening end of said connection tube is protruded,
The opening end of the connecting pipe and the opening end of the pipe are abutted with each other through the packing externally fitted to the positioning protrusion,
When the axial length of the main body is set a predetermined length shorter than the depth of the large-diameter recess, and the main body is inserted and arranged in the large-diameter recess, the end on the outer side of the positioning protrusion in the main body is Further, it is characterized in that a required gap is defined at the facing portion between the end portion and the packing, which is located inside the opening end of the connecting pipe .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, the pipe connection structure of the valve device according to the present invention will be described below with reference to the accompanying drawings by giving a preferred embodiment. In addition, the same code | symbol is attached | subjected to the same member demonstrated with the prior art with reference to FIG. 7, and detailed description is abbreviate | omitted.
[0011]
1 to 3 show a pipe connection structure according to a preferred embodiment, and a water supply pipe (pipe) 16 is connected to a connection pipe 10 on an inlet side of a solenoid valve as a valve device via a connection means. It is designed to be connected in a liquid-tight manner. This connection means includes a male screw 12 screwed on the outer periphery of the connection pipe 10 and a union nut 22 sheathed on the water supply pipe 16. The female screw 20 of the union nut 22 is connected to the male screw 12 of the connection pipe 10. As described above, the connection pipe 10 and the water supply pipe 16 are connected to each other by being screwed together.
[0012]
A cylindrical auxiliary tube 30 is removably inserted into the large-diameter recess 14 formed in the connecting tube 10. The auxiliary pipe 30 is provided with a cylindrical main body 30a that is set to be slightly smaller in diameter than the inner diameter of the large-diameter recess 14 and that can be inserted into and removed from the large-diameter recess 14 from the opening side. The insertion end is positioned by contacting the stepped portion 28 of the large-diameter recess 14. The axial length of the main body 30a is set to be substantially the same as the depth of the large-diameter recess 14, and a cylindrical protrusion having a smaller diameter than the main body 30a is provided at the end of the main body 30a facing the water supply pipe 16. A (positioning protrusion) 32 protrudes outward from the opening end 10a of the connecting pipe 10 by a predetermined length. In addition, the axial center of the cylindrical protrusion 32 and the connection pipe 10 is substantially coincident with the auxiliary pipe 30 inserted into the large-diameter recess 14. Moreover, the length dimension of the cylindrical protrusion 32 of the embodiment is set to be substantially the same as the thickness of the ring-shaped packing 24.
[0013]
The outer diameter of the cylindrical protrusion 32 is set to be slightly smaller than the inner diameter of the packing 24, and the packing 24 is fitted on the cylindrical protrusion 32, thereby positioning the packing 24 in the radial direction. Configured to That is, with the packing 24 externally fitted to the cylindrical protrusion 32, the entire surface of the opening end 10a of the connecting pipe 10 comes into contact with the opposing surface of the packing 24 as shown in FIG. . In addition, when connecting and connecting the connecting pipe 10 and the water supply pipe 16 with the packing 24 interposed therebetween, the pipe 16 is set so as not to interfere with the end of the cylindrical protrusion 32.
[0014]
A filter 26 for removing foreign substances similar to that described above is inserted into the main body 30a of the auxiliary pipe 30. The filter 26 is formed by bending an elastic part 26b larger than the inner diameter of the main body 30a at the open end of the main body 26a formed in a dome shape smaller than the inner diameter of the main body 30a. In a state of elastically contacting the inner peripheral surface of the main body portion 30a, the main body portion 30a is inserted and arranged on the insertion end portion side to the large-diameter concave portion. When the auxiliary pipe 30 is inserted into the large-diameter recess 14 of the connecting pipe 10, the open end of the filter 26 comes into contact with the stepped portion 28, and the movement of the filter 26 is restricted. . Incidentally, the filter 26 is formed by forming a stainless material into a net shape.
[0015]
[Effect of the embodiment]
Next, the operation of the pipe connection structure of the solenoid valve according to the embodiment will be described. When connecting the water supply pipe 16 to the connection pipe 10 of the solenoid valve, first, the filter 26 is elastically inserted into the main body 30a of the auxiliary pipe 30. The auxiliary pipe 30 is inserted into the large-diameter concave portion 14 of the connecting pipe 10, and the insertion end portion of the main body portion 30 a is brought into contact with the step portion 28 on the back side of the concave portion 14 and positioned. At this time, the open end of the filter 26 also comes into contact with the stepped portion 28, and the movement of the filter 26 is restricted.
[0016]
The cylindrical protrusion 32 of the auxiliary pipe 30 protrudes from the opening end 10a of the connection pipe 10 by a predetermined length, and the packing 24 is fitted on the cylindrical protrusion 32 so that the opening of the connection pipe 10 is opened. The packing 24 is positioned with respect to the end 10a. Next, the union nut 22 is screwed into the connecting pipe 10 with the opening end 16a of the water supply pipe 16 in contact with the surface of the packing 24 opposite to the surface with which the opening end 10a of the connecting pipe 10 contacts. Thereby, the opening end 10a of the connecting pipe 10 and the opening end 16a of the water supply pipe 16 are pressed against the packing 24, and the both 10 and 16 are connected in fluid-tight communication.
[0017]
Since the packing 24 is positioned in the radial direction by being externally fitted to the cylindrical protrusion 32 of the auxiliary pipe 30, there is no positional displacement in the radial direction during the connection work, and the connection pipe 10 and the water supply pipe 16 Is held in a proper position. Further, the packing 24 is not displaced even when the union nut 22 is screwed into the connecting pipe 10, and therefore, it is possible to suitably prevent the occurrence of water leakage at the connecting portion between the connecting pipe 10 and the water supply pipe 16. Moreover, since it is not necessary to perform the connection work while paying attention to the displacement of the packing 24, the workability is good, and the connection work can be easily performed in a short time. Further, since the filter 26 is inserted into the auxiliary pipe 30, the auxiliary pipe 30 and the filter 26 can be easily cleaned by removing the auxiliary pipe 30 from the connecting pipe 10 from which the water supply pipe 16 has been removed.
[0018]
[Example of change]
4 to 6 show modified examples of the pipe connection structure, and the basic configuration is the same as that of the above-described embodiment, and therefore only different parts will be described. That is, in the auxiliary pipe 30 according to the first modification shown in FIG. 4, the axial length of the main body portion 30 a is set to be shorter than the depth of the large-diameter concave portion 14 by a predetermined length. When the portion 30a is inserted and arranged, the end 30b outside the cylindrical protrusion 32 in the main body 30a is set so as to be located inside the opening end 10a of the connecting pipe 10 (inside the large-diameter recess 14). . As a result, a required gap 38 is defined at the facing portion between the end 30b and the packing 24, and the packing 24 is reliably pressed against the opening end 10a of the connecting pipe 10 and the opening end 16a of the water supply pipe 16. It has become so. That is, the end 30b of the main body 30a protrudes outward from the opening end 10a of the connecting pipe 10 due to a dimensional error of the auxiliary pipe 30, the connecting pipe 10 and the filter 26, or a displacement of the mounting position of the filter 26. The liquid-tightness by the packing 24 is ensured. In addition, the length dimension of the cylindrical protrusion 32 in the first modified example is longer than the thickness of the packing 24 by the gap 38.
[0019]
Next, in the auxiliary pipe 30 according to the second modified example shown in FIG. 5, the inner diameter of the inlet-side inner diameter portion 40 (the portion facing the portion where the filter 26 is inserted and disposed) on the water supply pipe 16 side is set to the water supply pipe. The pipe 16 is set smaller than the inner diameter by a predetermined length. Thereby, the flow volume of the water supplied to the connection pipe 10 from the water supply pipe 16 can be decreased. That is, the flow rate of water supplied to the connection pipe 10 can be adjusted by selecting and inserting the auxiliary pipe 30 having a different inner diameter of the inlet-side inner diameter portion 40 with respect to the connection pipe 10.
[0020]
Furthermore, in the auxiliary pipe 34 of the third modified example shown in FIG. 6, the main body 34 a of the auxiliary pipe 34 is protruded from the end of the main body 34 a while being inserted into the large-diameter recess 14 of the connecting pipe 10. The protruding dimension of the cylindrical protrusion (positioning protrusion) 36 is set to be longer than the thickness of the packing 24. The outer diameter of the cylindrical projection 36 is set slightly smaller than the inner diameter of the water supply pipe 16, and the tip of the cylindrical projection 36 protruding from the packing 24 is inserted into the water supply pipe 16. It is.
[0021]
In the third modified example, after the packing 24 is externally fitted to the cylindrical protrusion 36 of the auxiliary pipe 34 inserted and arranged in the large-diameter recess 14 of the connection pipe 10, the water supply pipe 16 is connected to the cylindrical protrusion 36. The water supply pipe 16 is held at an appropriate position with respect to the connection pipe 10 by facing the connection pipe 10 so that the distal end portion thereof is inserted. Therefore, the packing 24 can be reliably clamped by the connecting pipe 10 and the water supply pipe 16, and the occurrence of water leakage due to incomplete clamping can be prevented.
[0022]
In the third modification, as shown in FIG. 6, the filter 26 is inserted and arranged inside the large-diameter recess 14, and the insertion end portion of the auxiliary pipe 34 is brought into contact with the elastic portion 26 b of the filter 26. Although the auxiliary pipe 34 is positioned, the filter 26 may be inserted into the main body 34a of the auxiliary pipe 34 as in the above-described embodiment. In addition, the configuration of each modified example can adopt two configurations as appropriate or adopt all configurations in addition to adopting this alone.
[0023]
In the embodiment, the case where the positioning protrusion is formed in a cylindrical shape has been described, but the present application is not limited to this, and if the displacement in the radial direction of the packing can be regulated, for example, It may be composed of a plurality of projecting pieces projecting apart in the circumferential direction of the auxiliary pipe. Further, in the embodiment, the case where the connecting pipe on the inlet side of the solenoid valve and the water supply pipe are connected has been described, but the same structure may be adopted for the connection between the connecting pipe on the outlet side and the water pipe (pipe). it can. Furthermore, the valve device is not limited to an electromagnetic valve, and may be another type of valve. The liquid whose supply is controlled by the valve device may be juice or other beverages in addition to water.
[0024]
【The invention's effect】
As described above, according to the pipe connection structure of the valve device according to the present invention, since the packing is externally fitted and positioned on the positioning projection of the auxiliary pipe inserted and arranged in the connection pipe, the connection operation is performed. It is possible to prevent the packing from being displaced and to prevent liquid leakage from the connecting portion. Further, since it is not necessary to perform the connection work while paying attention to the displacement of the packing, there is an advantage that the work can be easily performed in a short time. Furthermore, by setting the required gap to be defined between the end of the auxiliary pipe outside the positioning projection and the packing, the packing is securely pressed against the open end of the connecting pipe and the open end of the pipe. It is possible to ensure more liquid-tightness.
[0025]
Since the positioning projection of the auxiliary pipe is configured to be inserted into the pipe, it is possible to prevent the pipe from being displaced in the radial direction with respect to the connection pipe, and the clamping of the packing is incomplete. The occurrence of liquid leakage can be prevented in advance. Further, by inserting and arranging the filter in the auxiliary pipe, the filter can be easily taken out of the connecting pipe together with the auxiliary pipe and cleaned . Na us, the inner diameter of the auxiliary tube, by setting the pipe inner diameter and different, it is possible to flow rate control.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view showing a pipe connection structure according to a preferred embodiment of the present invention.
FIG. 2 is an exploded side view showing a part of the auxiliary pipe, packing, and filter in the pipe connection structure according to the embodiment.
FIG. 3 is an exploded perspective view of an auxiliary pipe, packing, and filter in the pipe connection structure according to the embodiment.
FIG. 4 is a longitudinal side view showing a pipe connection structure according to a first modification.
FIG. 5 is a longitudinal side view showing a pipe connection structure according to a second modification.
FIG. 6 is a longitudinal side view showing a pipe connection structure according to a third modification.
FIG. 7 is a longitudinal side view showing a pipe connection structure according to a conventional technique.
[Explanation of symbols]
10 Connection pipe, 10a Open end, 14 Large diameter recess, 16 Water supply pipe (pipe)
16a Open end, 24 Packing, 26 Filter, 30 Auxiliary pipe, 30b End 32 Cylindrical protrusion (positioning protrusion), 34 Auxiliary pipe, 36 Cylindrical protrusion (positioning protrusion)
38 Clearance

Claims (5)

弁装置における接続管(10)の開口端(10a)にパッキン(24)を介してパイプ(16)の開口端(16a)を突合わせた状態で、該接続管(10)とパイプ(16)とを接続手段により接続する管接続構造であって、
前記接続管(10)の開口端(10a)から所定深さで内部に形成された大径凹部(14)に補助管(30,34)の本体部 (30a,34a)が挿脱可能に挿入され、
前記本体部 (30a,34a)前記パイプ(16)を指向する端部に、該本体部 (30a,34a) より小径で、前記接続管(10)の開口端(10a)から所定長さで突出する位置決め突部(32,36)が突設され、
該位置決め突部(32,36)に外嵌された前記パッキン(24)を介して前記接続管 (10) の開口端 (10a) とパイプ (16) の開口端 (16a) とが突合わされると共に
前記本体部 (30a) の軸長が、前記大径凹部 (14) の深さより所定長さ短かく設定されて、該本体部 (30a) を大径凹部 (14) に挿入配置したときに、本体部 (30a) における位置決め突部 (32) より外側の端部 (30b) が、前記接続管 (10) の開口端 (10a) より内側に位置して、該端部 (30b) と前記パッキン (24) との対向部に所要の隙間 (38) が画成されるよう構成した
ことを特徴とする弁装置の管接続構造。
With the open end (16a) of the pipe (16) abutting the open end (10a) of the connection pipe (10) in the valve device via the packing (24), the connection pipe (10) and the pipe (16) A pipe connection structure for connecting to each other by a connection means,
The main body (30a, 34a) of the auxiliary pipe (30 , 34) can be inserted into and removed from the large-diameter recess (14) formed inside at a predetermined depth from the opening end (10a) of the connection pipe (10). Inserted,
Said body portion (30a, 34a) on the end directed to the pipe (16), the body portion (30a, 34a) smaller in diameter than, a predetermined length from the opening end of the connecting tube (10) (10a) Projecting positioning protrusions (32, 36) are projected,
The opening end (10a) of the connection pipe (10 ) and the opening end (16a) of the pipe (16) are brought into contact with each other via the packing (24) externally fitted to the positioning protrusions (32, 36). With
When the axial length of the main body portion (30a) is set shorter than the depth of the large-diameter concave portion (14) by a predetermined length, and the main body portion (30a) is inserted into the large-diameter concave portion (14) , An end (30b) outside the positioning projection (32 ) in the main body (30a) is positioned inside the open end (10a) of the connection pipe (10) , and the end (30b) and the packing A pipe connection structure for a valve device, characterized in that a required gap (38) is defined at a portion facing (24) .
前記位置決め突部(32,36)の先端部が前記パイプ(16)に挿入されるよう設定され、該位置決め突部(32,36)によりパイプ(16)の径方向への位置ズレを規制するよう構成した請求項1記載の弁装置の管接続構造。  The tip of the positioning protrusion (32, 36) is set to be inserted into the pipe (16), and the positioning protrusion (32, 36) regulates the displacement of the pipe (16) in the radial direction. The pipe connection structure of the valve device according to claim 1 configured as described above. 前記補助管(30)にフィルタ(26)が挿脱可能に挿入配置されている請求項1または2記載の弁装置の管接続構造。  The pipe connection structure for a valve device according to claim 1 or 2, wherein a filter (26) is inserted in the auxiliary pipe (30) so as to be detachable. 前記大径凹部 (14) にフィルタ (26) が挿脱可能に挿入配置され、該フィルタ (26) に前記補助管 (34) の大径凹部 (14) への挿入端部を当接するよう構成した請求項1または2記載の弁装置の管接続構造。Configured the filters on large-diameter concave portions (14) (26) is inserted arranged detachably abuts the insertion end of the large-diameter recess of the auxiliary pipe to the filter (26) (34) to (14) The pipe connection structure for a valve device according to claim 1 or 2 . 前記補助管(30)の内径は、前記パイプ(16)の内径とは異なるよう設定されている請求項1〜4の何れかに記載の弁装置の管接続構造。  The pipe connection structure for a valve device according to any one of claims 1 to 4, wherein an inner diameter of the auxiliary pipe (30) is set to be different from an inner diameter of the pipe (16).
JP2000141790A 2000-05-15 2000-05-15 Pipe connection structure of valve device Expired - Fee Related JP3647719B2 (en)

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DE10342497A1 (en) * 2003-09-12 2005-04-21 Shaft Form Engineering Gmbh Connection system for a shaft to a joint
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