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JP3992398B2 - Connection joint for heat medium - Google Patents
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JP3992398B2 - Connection joint for heat medium - Google Patents

Connection joint for heat medium Download PDF

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Publication number
JP3992398B2
JP3992398B2 JP10795499A JP10795499A JP3992398B2 JP 3992398 B2 JP3992398 B2 JP 3992398B2 JP 10795499 A JP10795499 A JP 10795499A JP 10795499 A JP10795499 A JP 10795499A JP 3992398 B2 JP3992398 B2 JP 3992398B2
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Japan
Prior art keywords
main body
joint
heat medium
connection
pipe
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JP10795499A
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Japanese (ja)
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JP2000304289A (en
Inventor
隆文 川口
一久 井川
寛之 西村
正長 西浦
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Osaka Gas Co Ltd
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Osaka Gas Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、継手本体に筒状の本体接続部を備えさせた熱媒用接続継手に関する。
【0002】
【従来の技術】
このような熱媒用接続継手としては、例えば、温水を利用した暖房システムにおいて、熱源機である給湯装置から供給される熱媒としての湯水を複数に分流して、端末器である複数の暖房装置へ供給するための供給ヘッダや、複数の暖房装置からの湯水を合流して給湯装置へ戻すための戻りヘッダなどがある。
【0003】
かかるヘッダは、従来、真鍮などの金属材料による切削加工品で構成されており、本体接続部に対して管接続用の接続具としてのジョイントを内嵌状態に装着し、そのジョイントに設けられた接続部に熱媒通流管を外嵌状態に装着し、本体接続部とジョイントとに設けられた鍔状部間にわたってファスナなどの係止具を係止して、本体接続部に対して熱媒通流管を接続するように構成されていた。
【0004】
ところで、このような供給ヘッダや戻りヘッダでは、使用する端末器の種類や大きさなどに応じて、径の異なる複数種の熱媒通流管、例えば、7A、10A、13A(呼び径7ミリ、10ミリ、13ミリ)の3種類の熱媒通流管を使い分けて接続する必要性がある。
【0005】
【発明が解決しようとする課題】
そこで、従来、本体接続部に接続するジョイントとして、例えば、7A、10A、13A用の3種類のジョイントを準備し、7Aの熱媒通流管を接続する場合には7A用のジョイントを使用し、10Aの熱媒通流管を接続する場合には10A用のジョイントを使用して熱媒通流管を接続しており、そのために、径の異なる熱媒通流管の数だけ、種類の異なるジョイントを準備する必要があった。
つまり、上述の例であれば、7A、10A、13A用の3種類のジョイントを準備する必要があり、ジョイントの種類の増加に伴ってジョイントのコストアップを招くという欠点があった。
【0006】
本発明は、このような従来の問題点を解消するもので、その目的は、径の異なる何種類かの熱媒通流管を接続できるにもかかわらず、管接続用の接続具の種類を減らすことができ、それによって接続具のコストダウンを図り得る熱媒用接続継手の提供にある。
【0007】
【課題を解決するための手段】
この目的を達成するため、請求項1に記載の発明によれば、継手本体に筒状の本体接続部を備えさせた熱媒用接続継手であって、前記本体接続部の外周部に、それに外嵌状態に装着される管の抜け止めのために、本体接続部先端側ほど小径となる複数の段部が、本体接続部長手方向に並べて設けられ、前記本体接続部の先端部に、その本体接続部に内嵌状態で装着される管接続用の接続具の抜け止めのために、その接続具の鍔状部に係止させた係止具を係止させる鍔状部が設けられている。
【0008】
すなわち、本体接続部の先端部に係止具を係止させるための鍔状部が設けられているので、従来と同様に、本体接続部に対して内嵌状態で装着される接続具を介在させて、本体接続部に各種の管を接続することができる。
それに加えて、本体接続部の外周部に管抜け止めのための複数の段部が設けられているので、本体接続部に対して各種の管を直接外嵌して、抜け落ちの虞なく接続することができる。
したがって、従来と同様に、径の異なる何種類かの管を接続できるにもかかわらず、従来必要であった接続具の種類を1種類減らすことができて、接続具のコストダウンを図ることができる。
【0009】
請求項2に記載の発明によれば、前記接続具に設けられた管接続用の接続部に、それに外嵌状態に装着される管の抜け止めのために、接続部先端側ほど小径となる複数の段部が、接続部長手方向に並べて設けられている。
【0010】
すなわち、前記本体接続部に対して接続具を介在させて各種の管を接続する場合、その接続具の接続部にも管抜け止めのための複数の段部が設けられているので、例えば、前記接続部に管を外嵌した後にバンドなどで締付けなくとも、前記段部の作用で抜け落ちの虞なく確実に接続することができる。
【0011】
請求項3に記載の発明によれば、前記本体接続部が、前記継手本体の長手方向に並べて複数個設けられ、その複数個の本体接続部の一部が、前記段部と鍔状部とを備えた段部付き本体接続部に構成され、他のものが、前記段部と鍔状部のうちの鍔状部のみを備えて、その本体接続部に内嵌状態で装着される接続具専用の接続具用本体接続部に構成されている。
【0012】
すなわち、本体接続部が複数個設けられているので、例えば、暖房システムを例にとれば、床暖房装置、浴室暖房装置、食器洗浄機、ファンコンベクタなどの各種の端末器に熱媒を分流して供給することができ、しかも、各端末器に対応して大径の管や小径の管を確実に接続することができる。
そして、このように径の異なる複数の管を確実に接続できるにもかかわらず、上述したように接続具の種類を減らすことができるので、全体として大幅なコストダウンも可能となる。
【0013】
請求項4に記載の発明によれば、前記継手本体、本体接続部、段部、ならびに、鍔状部の全てが、合成樹脂にて一体的に形成されている。
【0014】
すなわち、継手本体や本体接続部などの全てをセラミックで一体的に形成することもできるが、合成樹脂の方が、セラミックに比べて折れ難く、かつ、成形も容易で、より一層のコストダウンが可能となる。
【0015】
【発明の実施の形態】
本発明による熱源機用継手の実施の形態を図面に基づいて説明する。
このような熱源機用継手は、一般家庭用の給湯装置を利用した暖房システムなどに付随して使用されるもので、給湯装置そのものは、図1に示すように、フィンチューブ型の給湯用熱交換器1を備える一般用の給湯装置Aと、フィンチューブ型の追焚用熱交換器2を備える風呂用の追焚装置Bと、フィンチューブ型の暖房用熱交換器3を備える暖房用の熱源機Cなどによって構成されている。
この給湯装置は、カランやシャワーなどの一般の給湯栓4に湯水を供給し、浴槽5に湯張りを行うとともに、浴槽5の湯水を追焚し、かつ、床暖房装置、浴室暖房装置、食器洗浄機、ファンコンベクタなどの暖房用の端末器Dに熱媒としての湯水を循環供給するために使用される。
【0016】
前記給湯装置Aは、給湯用熱交換器1に加えて、その熱交換器1の入口側に接続の給水路6と出口側に接続の給湯路7、ならびに、給湯用熱交換器1を加熱するガスバーナ8などで構成され、給水路6を家庭用の水道管に、給湯路7を給湯管9に接続することにより、水道管からの水を加熱して、加熱後の湯水を給湯管9に設けた給湯栓4から吐出するように構成されている。
前記給水路6には、水フィルタ6a、アキュームレータ6b、給水サーミスタ6c、水量センサ6d、熱交換器1を迂回して給水路6からの水を給湯路7に供給するバイパス路6eなどが設けられ、給湯路7には、給湯サーミスタ7a、熱交換器1からの湯水とバイパス路6eからの水との混合比を調整するミキシングバルブ7b、ミキシングサーミスタ7c、水比例バルブ7d、割り込み水量センサ7e、過圧防止装置7fなどが設けられている。
【0017】
前記追焚装置Bは、追焚用熱交換器2に加えて、その熱交換器2の入口側に接続の風呂戻り路10と出口側に接続の風呂往き路11、風呂戻り路10と給湯路7とを連通する湯張り路12、追焚用熱交換器2を加熱する前記ガスバーナ8などで構成されている。
風呂戻り路10には、継手13を介して浴槽5のアダプタ5aから延びる浴槽側戻り路5bが接続され、風呂往き路11には、継手14を介して浴槽5のアダプタ5aから延びる浴槽側往き路5cが接続され、浴槽5に湯張りしたり、浴槽5の湯水を追焚するように構成されている。
そのため、風呂戻り路10には、この風呂戻り路10に作用する圧力に基づいて浴槽5内の水位を検出する水位センサ10a、戻りサーミスタ10b、二方弁10c、エア置換用電磁弁10d、追焚用循環ポンプ10e、水流スイッチ10fが設けられ、風呂往き路11には、往きサーミスタ11aが、また、湯張り路12には湯張り電磁弁12aが設けられている。
【0018】
暖房用の熱源機Cは、暖房用熱交換器3に加えて、この熱交換器3の出口側に接続の高温往き路15および補給水タンクTの入口側に接続の熱媒戻り路16などで構成される高温側熱媒通路HR、補給水タンクTの出口側と熱交換器3の入口側とを連通する熱媒通路17から分岐の低温往き路18および前記熱媒戻り路16などで構成される低温側熱媒通路LR、熱交換器3を加熱するガスバーナ19などで構成されている。
高温往き路15の一端側に設けられた高温側熱媒通路HRの吐出口15aには、熱媒用接続継手としての高温用供給ヘッダHD1が接続可能に構成され、熱媒戻り路16の一端側に設けられた高温側熱媒通路HRの戻り口16aには、熱媒用接続継手としての戻りヘッダHD2が接続可能に構成されていて、高温用供給ヘッダHD1と暖房用の高温型の端末器Dとを複数の往き側熱媒通流管20を介して接続し、かつ、端末器Dと戻りヘッダHD2とを複数の戻り側熱媒通流管21を介して接続することにより、熱媒としての高温湯水を高温型の端末器Dに循環供給するように構成されている。
【0019】
同様に、低温往き路18の一端側に設けられた低温側熱媒通路LRの吐出口18aには、熱媒用接続継手としての低温用供給ヘッダHD3が接続可能に構成されていて、この低温用供給ヘッダHD3と図外の低温型の端末器とを往き側熱媒通流管で、その低温型の端末器と戻りヘッダHD2とを戻り側熱媒通流管で接続することによって、熱媒としての低温湯水を低温型の端末器に循環供給するように構成されている。
【0020】
すなわち、前記熱媒通路17に設けられた熱媒用循環ポンプ22を駆動することによって、高温往き路15に設けられた高温サーミスタ15b、低温往き路18に設けられた低温サーミスタ18b、熱媒戻り路16に設けられた戻りサーミスタ16bなどの検出結果に基づく湯水流動の管理の基で、給水路6からタンク給水路23を介して補給水タンクTに供給された水が、暖房用熱交換器3で加熱されて、高温往き路15、高温用供給ヘッダHD1、往き側熱媒通流管20を介して高温型の端末器Dに供給され、また、暖房用熱交換器3を迂回して、低温往き路18や低温用供給ヘッダHD3を介して図外の低温型の端末器に供給されるように構成され、高温型の端末器Dと低温型の端末器からの湯水が、戻りヘッダHD2や熱媒戻り路16を介して補給水タンクTに戻されるように構成されている。
【0021】
なお、前記タンク給水路23には、補給水バルブ23aと補給水電磁弁23bとが設けられ、補給水タンクTには、水位の上限を検出する上限センサ24aと下限を検出する下限センサ24bとが設けられ、かつ、オーバフロー路24cが接続されている。
また、給湯用熱交換器1と追焚用熱交換器2とを加熱するガスバーナ8および暖房用熱交換器3を加熱するガスバーナ19に燃焼ガスを供給するガス供給路25には、元ガス電磁弁25a、給湯用のガス比例弁25b、ガス電磁弁25c、ガス切替電磁弁25d、暖房用のガス電磁弁25e、暖房用のガス比例弁25fなどが設けられている。
【0022】
つぎに、高温用供給ヘッダHD1と戻りヘッダHD2、ならびに、これらヘッダHD1,HD2に取り付けられるジョイントについて説明するが、高温用供給ヘッダHD1とそのジョイント、ならびに、戻りヘッダHD2とそのジョイントとは、熱媒の通流方向が逆向きになる以外は全く同じ構造に構成されているので、重複説明を避けるため、高温用供給ヘッダHD1についてのみ説明し、戻りヘッダHD2については説明を省略する。
【0023】
高温用供給ヘッダHD1は、図2および図3に示すように、直線筒状の熱媒通流用継手本体31、直線筒状の弁スライド用継手本体32、ならびに、端部にOリングを備えた円筒状の熱源機側接続部としての熱源側挿入部33などを備えて全体がT字状に構成され、そのT字状のヘッダ全体が、合成樹脂製の一体成形品で形成されている。
前記熱媒通流用継手本体31には、その周方向での位相を同じにして、かつ、その筒の長手方向に沿って並んだ状態で、2本の筒状の分岐管34と、その分岐管34と構造の異なる1本の筒状の分岐管36、ならびに、1本の筒状の検査用管38とが、合成樹脂により一体的に形成され、2本の分岐管34には、後述するジョイントを介して往き側熱媒通流管20が接続される接続具用本体接続部としての接続具用開口部35が設けられ、1本の分岐管36には、段部付き本体接続部としての段部付き開口部37が設けられ、検査用管38には、後述する検査用流体を供給するための供給管が接続される検査用開口部39が設けられ、これら接続具用開口部35、段付き開口部37、ならびに、検査用開口部39の内径は、全て同じ径に構成されている。
【0024】
前記検査用管38は、弁スライド用継手本体32に近接する位置に配設され、その検査用管38に隣接する分岐管36の先端部、つまり、段部付き開口部37の先端部には、後述するファスナ用の鍔状部37aが一体的に形成され、かつ、分岐管36の外周部、つまり、段付き開口部37の外周部には、段付き開口部37に対して外嵌状態に装着される熱媒通流管20の抜け止めのために、先端側ほど小径となる複数の段部37bが、段付き開口部37の長手方向に並べた状態で一体的に形成されている。
他の2本の分岐管34の先端部、つまり、接続具用開口部35の先端部にも、ファスナ用の鍔状部35aが一体的に形成されているが、上述したような段部37bは設けられておらず、同様に、検査用開口部39にも、ファスナ用の鍔状部39aのみが一体的に形成されている。
【0025】
そして、段部付き開口部37には、径の大きな熱媒通流管20が外嵌されて接続され、接続具用開口部35には、合成樹脂製の直線型ジョイント40を介して径の小さな熱媒通流管20が接続されている。
この直線型ジョイント40は、接続具用開口部35に内嵌状態で装着される管接続用の接続具の一例で、接続具用開口部35に内嵌するためのOリング付き挿入部41を備え、かつ、その挿入部41の根元部には、ファスナ用の鍔状部41aが一体的に形成されている。そして、前記挿入部41の反対側には、熱媒通流管20が外嵌状態に装着される接続部としての管用開口部42が設けられ、その管用開口部42の外周部には、管用開口部42に対して外嵌状態に装着される熱媒通流管20の抜け止めのために、先端側ほど小径となる複数の段部42bが、管用開口部42の長手方向に並べた状態で一体的に形成されている。
【0026】
そして、この実施形態においては、段部付き開口部37に、図8の(ハ)にも示すように、13Aの熱媒通流管20が外嵌されてバンドBDで締付けられて接続されている。それに対し、接続具用開口部35には、直線型ジョイント40が接続されて、そのジョイント40の鍔状部41aと接続具用開口部35の鍔状部35aとにわたって係止具として機能する金属製のファスナFが係止され、その直線型ジョイント40の管用開口部42に、7Aの熱媒通流管20が外嵌されて接続されている。
そして、暖房システムに対応させて、段部付き開口部37にも7Aの熱媒通流管20を接続したい場合には、図8の(イ)に示すように、接続具用開口部39に接続したと同じ直線型ジョイント40を段付き開口部37に接続し、その直線型ジョイント40の鍔状部41aと段付き開口部37の鍔状部37aとにわたってファスナFを係止して、その直線型ジョイント40の管用開口部42に7Aの熱媒通流管20を外嵌して接続するのである。
【0027】
更に、10Aの熱媒通流管20を接続したい場合には、図8の(ロ)に示すように、10A用の直線型ジョイント40Aを段付き開口部37に接続してファスナFを外嵌し、その10A用の直線型ジョイント40Aの管用開口部42Aに10Aの熱媒通流管20を外嵌して接続するのである。
そして、この10A用の直線型ジョイント40Aと上述した7A用の直線型ジョイント40とは、管用開口部42A,42の外径が異なるだけで、挿入部41については全く同じサイズに構成されているので、10A用の直線型ジョイント40Aを使用して、接続具用開口部35に10Aの熱媒通流管20を接続することもできる。
【0028】
前記熱媒通流用継手本体31の端部開口部43も、接続具用開口部35や段付き開口部37と同じ内径に構成されていて、かつ、ファスナ用の鍔状部43aが一体的に形成されている。
この実施形態では、端部開口部43にOリングを備えた密閉用プラグ44が挿入されて閉鎖されているが、必要な場合には、図2に示すL型ジョイント45を端部開口部43に接続し、L型ジョイント45の挿入部46に設けられた鍔状部46aと端部開口部43に設けられた鍔状部43aとにファスナFを外嵌し、管抜け止め用の段部47bが設けられた管用開口部47に熱媒通流管20を外嵌して接続することもできる。
なお、このL型ジョイント45にも7Aと10A用があり、必要に応じて使い分けができるように構成されている。
【0029】
前記検査用管38に設けられた検査用開口部39の奥には、図6に拡大して示すように、先端に通流孔48aを備えたゴムなどの弾性体で構成された逆止弁48が収納されて抜け止め具49により取り付けられ、検査用開口部39に対しては、図1において一点鎖線で示すように、風呂往き路11に設けられた継手14の水抜き部14aに接続の供給管50が接続可能に構成されている。
その供給管50は、図7に示すように、一端部に前記水抜き部14aに接続する水抜き側アダプタ50aを、他端部に検査用開口部39に内嵌状態で接続するための差し込み挿入部50bを備え、この供給管50を介して風呂往き路11と検査用開口部39とを接続することによって、検査用流体としての水を風呂往き路11から高温用供給ヘッダHD1に供給できるように構成されている。
【0030】
すなわち、風呂往き路11から検査用流体としての水が供給されると、図6の(イ)に示す状態にあった逆止弁48が、図6の(ロ)に示すように、その水圧によって弾性的に膨張し、その膨張に伴って通流孔48aが拡径して、検査用開口部39から高温用供給ヘッダHD1内へのみ水の通流を許容し、供給ヘッダHD1内から検査用開口部39への水の通流を阻止するように構成されている。
【0031】
前記熱源側挿入部33の弁スライド用継手本体32側の端部には、弁座33aが設けられ、その弁座33aに接当可能な弁体51aとによって切替弁51が構成されるとともに、弁体51aには、中空の操作筒51bとその操作筒51bの端部に設けられた操作部51cとが連設され、全体が耐熱性の合成樹脂によって一体的に形成されて、弁スライド用継手本体32に沿ってスライド移動自在で、かつ、そのスライド方向に沿う軸心周りに回動自在に取り付けられている。
【0032】
前記操作筒51bには、図5に展開して示すように、Z形の案内溝52が、180度位置を異ならせた状態で互いに対向するように設けられ、その対向する案内溝52に対してスプリングピン53が、図4に示すように、対向する案内溝52を貫通する状態で弁スライド用継手本体32に取り付けられている。
前記案内溝52は、直線状の溝52aと、その直線状の溝52aの下端に連通する下方傾斜溝52b、ならびに、下方傾斜溝52bに連通する下方係止溝52cとを備え、かつ、直線状の溝52aの上端に連通する上方傾斜溝52d、ならびに、上方傾斜溝52dに連通する上方係止溝52eも備えて構成されている。
【0033】
そして、操作部51cを下方にスライド操作することによって、図2に示すように、弁体51aが弁座33aから離れるとともに、直線状の溝52aの上端にスプリングピン53が位置して、切替弁51が熱媒通流状態に対応する状態となる。その後、操作部51cを右方向に回動操作することによって、前記上方傾斜溝52dの作用で、切替弁51が熱媒通流状態側に若干スライドされて、上方係止溝52e内にスプリングピン53が位置し、切替弁51の検査状態側へのスライドが阻止されて通流側係合状態となる。
つまり、切替弁51の弁体51aが熱源側挿入部33の弁座33aから離れて、熱源側挿入部33と各開口部35,37とが連通接続され、高温往き路15からの高温湯水が各開口部35,37と熱媒通流管20を介して各端末器Dに供給される熱媒通流状態に切換え操作される。
【0034】
熱媒通流状態にある切替弁51を検査状態に切換え操作するには、操作部51cを左方向に回動操作して、上述した通流側係合状態を解除し、操作部51cを上方にスライド操作する。すると、図3に示すように、直線状の溝52aの下端にスプリングピン53が位置して、切替弁51が検査状態に対応する状態となる。その後、操作部51cを左方向に回動操作することによって、前記下方傾斜溝52bの作用で、切替弁51が検査状態側に若干スライドされて、下方係止溝52e内にスプリングピン53が位置し、切替弁51の熱媒通流状態側へのスライドが阻止されて検査側係合状態となる。
つまり、切替弁51の弁体51aが前記弁座33aに接当して、熱源側挿入部33と各開口部35,37との連通が遮断されて、供給管50から検査用開口部39へ供給される検査用流体としての水が、逆止弁48、各開口部35,37、熱媒通流管20を介して各端末器Dに供給される検査状態に切換え操作される。
【0035】
なお、この図3では、上述した切替弁51の検査状態に対応する状態と、検査状態とを同時に示すため、直線状の溝52aの下端にスプリングピン53が位置しているにもかかわらず、切替弁51の弁体51aが弁座33aに接当しているが、実際には、直線状の溝52aの下端にスプリングピン53が位置している状態では、弁体51aが弁座33aから少し離れた位置に位置することになる。
【0036】
以上の構成から暖房システムにおいては、高温往き路15の吐出口15aに高温用供給ヘッダHD1の熱源側挿入部33を内嵌して接続してファスナFを外嵌し、その供給ヘッダHD1の段付き開口部37に13Aの往き側熱媒通流管20を外嵌接続し、接続具用開口部35に直線型ジョイント40を介して7Aの往き側熱媒通流管20を接続する。
そして、説明は省略したが、熱媒戻り路16の戻り口16aに戻りヘッダHD2の熱源側挿入部33を内嵌して接続し、その戻りヘッダHD2の段付き開口部37に13Aの戻り側熱媒通流管21を外嵌し、接続具用開口部35に直線型ジョイント40を介して7Aの戻り側熱媒通流管21を接続する。
【0037】
それによって、高温往き路15からの高温湯水が、高温用供給ヘッダHD1によって複数に分流され、往き側通流管20を介して各高温型の端末器Dに供給されるとともに、各端末器Dからの湯水が、戻り側通流管21を介して戻りヘッダHD2に供給され、戻りヘッダHD2により合流されて、熱媒戻り路16を介して補給水タンクTに戻されるように構成されている。
【0038】
なお、説明は省略したが、低温型の端末器側においても同様で、低温往き路18の吐出口18aに低温用供給ヘッダHD3を接続し、その供給ヘッダHD3と端末器とを往き側熱媒通流管を接続するとともに、端末器と戻りヘッダHD2とを戻り側熱媒通流管を接続することにより、低温往き路18からの低温湯水が、低温用供給ヘッダHD3から低温型の端末器に供給され、低温型の端末器からの湯水が、戻りヘッダHD2と熱媒戻り路16を介して補給水タンクTに戻されるように構成されている。
なお、その場合、戻りヘッダHD2においては、熱媒通流用継手本体31の端部開口部43に、L側ジョイント45を取り付けて、低温型の端末器からの戻り側熱媒通流管を接続する。
【0039】
この暖房システムにおいて、高温型の端末器Dを設置した後などに、その端末器D側の気密検査を行うには、図1に示すように、浴槽5のアダプタ5aの湯水給排出口を閉じる安全弁付きの栓部材5dを取り付けるとともに、高温用供給ヘッダHD1と戻りヘッダHD2のうちのいずれか一方、この実施形態では供給ヘッダHD1の検査用開口部39に供給管50を接続して、検査用開口部39を風呂往き路11の水抜き部14aに連通接続させる。
そして、高温用供給ヘッダHD1の切替弁51も、戻りヘッダHD2の切替弁51も、共に前記熱媒通流状態に切換えて、栓部材5dの安全弁を開にするとともに湯張り電磁弁12aを開き、湯張り路12から追焚系統および供給管50に水を供給して追焚系統および供給管50に水を充満させるとともに空気抜きを行う。
【0040】
つぎに、栓部材5dの安全弁を閉じ、タンク給水路23を開いて熱媒用循環ポンプ22を駆動し、熱源機Cの高温側熱媒通路HRと端末器Dに対する熱媒通流管20,21とに水を供給し、補給水タンクTの下限センサ24bが検出状態になってから設定時間が経過すると給水を停止し、端末器Dに対する熱媒通流管20,21に水を充満させるとともに熱媒通流管20,21の空気抜きを行う。つまり、熱媒通流管20,21の内部空気を高温側熱媒通路HRを通して補給水タンクTから流出させる。
これらの空気抜きが完了すると、高温用供給ヘッダHD1の切替弁51も、戻りヘッダHD2の切替弁51も、共に前記検査状態に切換えて、風呂往き路11からの水を供給管50によって高温用供給ヘッダHD1に供給し、この給水によって端末器Dに対する熱媒通流管20,21内の水圧が、風呂戻り路10が備えている水位センサ10aにより設定圧になるまで加圧する。
【0041】
そして、設定圧にまで加圧した後、加圧操作を停止して、風呂戻り路10の水位センサ10aにより、圧力低下の有無を検出したり、圧力低下の速度を検出して、著しい圧力低下や、急速度の圧力低下がなければ端末器Dにおける熱媒通流管20,21が良好な気密状態にあると判断する。
この気密検査を完了すると、供給管50を高温用供給ヘッダHD1から取り外し、必要に応じて、図2に示すように、密閉用プラグなどで閉鎖して、高温用供給ヘッダHD1の切替弁51も、戻りヘッダHD2の切替弁51も、共に前記熱媒通流状態に切り換えるのである。
【0042】
なお、低温型の端末器側における気密検査については、低温用供給ヘッダHD3と戻りヘッダHD2のうちのいずれか一方の検査用開口部に前記供給管50を接続し、その他は、高温型の端末器D側における気密検査と同様に行う。
また、高温型の端末器Dと低温型の端末器とが共に接続されている場合には、供給管50を戻りヘッダHD2の検査用開口部39に接続して、高温型の端末器D側と低温型の端末器側との気密検査を同時に行うこともできる。
【0043】
〔別実施形態〕
(1)先の実施形態では、熱媒通流用継手本体31に対して、1個の段付き開口部37と2個の接続具用開口部35を設けた例を示したが、段付き開口部37と接続具用開口部35の個数については、種々変更して実施することができ、極端な場合には、熱媒通流用継手本体31に対して段付き開口部37のみを1個だけ設けて実施することもできる。
【0044】
(2)先の実施形態では、接続具としての直線型ジョイント40,40Aの管用開口部42,42Aに抜け止め用の段部42bを設けた例を示したが、この段部42bについては必ずしも必要ではなく、例えば、管用開口部42,42Aに熱媒通流管を外嵌した後、その熱媒通流管にバンドなどをはめて接続することもできる。
【0045】
(3)先の実施形態では、熱媒通流用継手本体31、弁スライド用継手本体32、熱源側挿入部33をはじめとして、両開口部35,37と検査用開口部39、ならびに、各鍔状部35a,37a,39a,43aと段部37bなどの全てを合成樹脂にて一体的に形成した例を示したが、合成樹脂以外の材料、例えば、セラミックにより一体形成することもできる。
【図面の簡単な説明】
【図1】暖房システム全体の概略図
【図2】ヘッダの一部切欠き断面図
【図3】ヘッダの一部切欠き断面図
【図4】切替弁の要部の断面図
【図5】切替弁の要部の展開図
【図6】逆止弁の断面図
【図7】検査用流体の供給管の説明図
【図8】直線型ジョイントの説明図
【符号の説明】
31 継手本体
35 接続具用本体接続部
35a 鍔状部
37 段付き本体接続部
37a 鍔状部
37b 段部
40 管接続用の接続具
41a 鍔状部
42 接続部
42b 段部
F 係止具
HD1,HD2,HD3 熱媒用接続継手
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat medium connection joint in which a joint body is provided with a cylindrical main body connection portion.
[0002]
[Prior art]
As such a heat medium connection joint, for example, in a heating system using hot water, a plurality of heating devices serving as terminals are divided by dividing hot water as a heat medium supplied from a hot water supply device serving as a heat source device into a plurality of heating devices. There are a supply header for supplying to the device, a return header for joining hot water from a plurality of heating devices and returning them to the hot water supply device, and the like.
[0003]
Conventionally, such a header has been configured by a machined product made of a metal material such as brass, and a joint as a connection tool for pipe connection is attached to the main body connection portion in an internally fitted state, and is provided in the joint. A heat medium flow pipe is externally fitted to the connection part, and a fastener such as a fastener is locked between the hook-shaped parts provided on the main body connection part and the joint to heat the main body connection part. It was configured to connect the medium flow pipe.
[0004]
By the way, in such supply header and return header, a plurality of types of heat medium flow pipes having different diameters, for example, 7A, 10A, and 13A (nominal diameter of 7 mm), depending on the type and size of the terminal used. There is a need to use and connect three types of heat medium flow pipes (10 mm and 13 mm).
[0005]
[Problems to be solved by the invention]
Therefore, conventionally, for example, three types of joints for 7A, 10A, and 13A are prepared as joints to be connected to the main body connecting portion, and the 7A joint is used when connecting the 7A heat transfer pipe. In the case of connecting a 10A heat medium flow pipe, the heat medium flow pipe is connected using a joint for 10A. Therefore, as many heat medium flow pipes with different diameters are used. It was necessary to prepare different joints.
That is, in the above-described example, it is necessary to prepare three types of joints for 7A, 10A, and 13A, and there is a drawback that the cost of the joint is increased as the number of types of joints increases.
[0006]
The present invention solves such a conventional problem, and the object thereof is to change the types of pipe connection connectors, although several types of heat medium flow pipes having different diameters can be connected. It is to provide a connection joint for a heat medium that can be reduced, thereby reducing the cost of the connection tool.
[0007]
[Means for Solving the Problems]
In order to achieve this object, according to the first aspect of the present invention, there is provided a heat medium connection joint in which a joint body is provided with a cylindrical body connection portion, and an outer peripheral portion of the body connection portion includes In order to prevent the pipe mounted in the outer fitting state, a plurality of stepped portions having a smaller diameter toward the distal end side of the main body connection portion are provided side by side in the longitudinal direction of the main body connection portion. In order to prevent the fitting for connecting a pipe attached to the main body connection portion in an internally fitted state, a hook-like portion for locking the locking tool locked to the hook-like portion of the connecting tool is provided. Yes.
[0008]
That is, since a hook-shaped portion for locking the locking tool is provided at the tip of the main body connecting portion, a connecting tool mounted in an internally fitted state on the main body connecting portion is interposed as in the conventional case. Thus, various pipes can be connected to the main body connecting portion.
In addition, since a plurality of steps are provided on the outer periphery of the main body connecting portion to prevent the pipe from being removed, various pipes are directly fitted onto the main body connecting portion so that they can be connected without fear of falling off. be able to.
Therefore, in the same way as in the past, although several types of pipes having different diameters can be connected, the type of connection tool that has been necessary in the past can be reduced by one, and the cost of the connection tool can be reduced. it can.
[0009]
According to the second aspect of the present invention, the diameter of the connecting portion distal end side becomes smaller in order to prevent the tube attached to the connecting portion for connecting the tube provided in the connecting tool from being fitted in the outer fitting state. A plurality of step portions are provided side by side in the longitudinal direction of the connecting portion.
[0010]
That is, when various pipes are connected to the main body connection portion with a connection tool interposed therebetween, a plurality of step portions for preventing the pipe from being removed are also provided in the connection portion of the connection tool. Even if the pipe is externally fitted to the connection portion and is not tightened with a band or the like, the connection can be surely made without fear of falling off due to the action of the stepped portion.
[0011]
According to invention of Claim 3, the said main body connection part is provided with two or more along with the longitudinal direction of the said coupling main body, A part of the some main body connection part is the said step part and a bowl-shaped part. A connecting device that is configured as a main body connecting portion with a stepped portion, and that includes only a hook-shaped portion of the stepped portion and the hook-shaped portion, and that is attached to the main body connecting portion in an internally fitted state. It is comprised in the main body connection part for exclusive connection tools.
[0012]
That is, since a plurality of main body connection portions are provided, for example, in the case of a heating system, the heat medium is divided into various terminals such as a floor heating device, a bathroom heating device, a dishwasher, and a fan convector. In addition, a large-diameter pipe or a small-diameter pipe can be reliably connected to each terminal.
In addition, despite the fact that a plurality of tubes having different diameters can be reliably connected in this way, the types of connecting tools can be reduced as described above, so that the cost can be greatly reduced as a whole.
[0013]
According to invention of Claim 4, all of the said coupling main body, a main-body connection part, a step part, and a collar part are integrally formed with the synthetic resin.
[0014]
In other words, all of the joint body and main body connection part can be integrally formed of ceramic, but synthetic resin is less likely to be broken and easier to mold than ceramic, further reducing cost. It becomes possible.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a heat source machine joint according to the present invention will be described with reference to the drawings.
Such a heat source machine joint is used in association with a heating system using a general household hot water supply device, and the hot water supply device itself has a fin tube type hot water supply heat as shown in FIG. A general hot water supply device A provided with the exchanger 1, a bath remedy device B provided with the fin tube type heat exchanger 2, and a heating use provided with the fin tube type heat exchanger 3 for heating. It is comprised by the heat source machine C etc.
This hot water supply device supplies hot water to a general hot water tap 4 such as a currant or a shower, fills the bathtub 5 with water, keeps track of the hot water in the bathtub 5, and also provides a floor heating device, a bathroom heating device, and tableware. It is used to circulate and supply hot water as a heating medium to a heating terminal D such as a washing machine or a fan convector.
[0016]
In addition to the hot water supply heat exchanger 1, the hot water supply apparatus A heats the water supply path 6 connected to the inlet side of the heat exchanger 1, the hot water supply path 7 connected to the outlet side, and the hot water supply heat exchanger 1. The water heater 6 is connected to the household water pipe and the hot water supply path 7 is connected to the hot water supply pipe 9 to heat the water from the water pipe, and the heated hot water is supplied to the hot water supply pipe 9. It is constituted so that it may discharge from hot-water tap 4 provided in.
The water supply path 6 is provided with a water filter 6 a, an accumulator 6 b, a water supply thermistor 6 c, a water amount sensor 6 d, a bypass path 6 e that bypasses the heat exchanger 1 and supplies water from the water supply path 6 to the hot water supply path 7. The hot water supply passage 7 includes a hot water supply thermistor 7a, a mixing valve 7b for adjusting the mixing ratio of hot water from the heat exchanger 1 and water from the bypass passage 6e, a mixing thermistor 7c, a water proportional valve 7d, an interrupt water amount sensor 7e, An overpressure prevention device 7f and the like are provided.
[0017]
In addition to the heat exchanger 2 for the memorial service, the memorial device B has a bath return path 10 connected to the inlet side of the heat exchanger 2, a bath return path 11 connected to the outlet side, the bath return path 10 and a hot water supply. A hot water filling passage 12 that communicates with the passage 7, the gas burner 8 that heats the heat exchanger 2 for remedy, and the like.
A bathtub-side return path 5b extending from the adapter 5a of the bathtub 5 via the joint 13 is connected to the bath return path 10, and a bathtub-side return extending from the adapter 5a of the bathtub 5 to the bath return path 11 via the joint 14. The path 5c is connected, and is configured to fill the bathtub 5 or memorize the hot water of the bathtub 5.
Therefore, the bath return path 10 includes a water level sensor 10a for detecting the water level in the bathtub 5 based on the pressure acting on the bath return path 10, a return thermistor 10b, a two-way valve 10c, an air replacement solenoid valve 10d, an additional valve. A circulation pump for eaves 10e and a water flow switch 10f are provided, a forward thermistor 11a is provided in the bath going path 11, and a hot water solenoid valve 12a is provided in the hot water filling path 12.
[0018]
In addition to the heat exchanger 3 for heating, the heat source unit C for heating includes a high-temperature forward path 15 connected to the outlet side of the heat exchanger 3, a heat medium return path 16 connected to the inlet side of the makeup water tank T, and the like. A high-temperature side heat medium passage HR constituted by a low-temperature forward path 18 branched from the heat medium path 17 that connects the outlet side of the makeup water tank T and the inlet side of the heat exchanger 3, and the heat medium return path 16 The low-temperature-side heat medium passage LR and the gas burner 19 that heats the heat exchanger 3 are configured.
A high-temperature supply header HD1 as a heat-medium connection joint is connectable to the discharge port 15a of the high-temperature-side heat medium passage HR provided on one end side of the high-temperature going-out path 15, and one end of the heat medium return path 16 is connected. A return header HD2 as a connection joint for heat medium is connectable to the return port 16a of the high temperature side heat medium passage HR provided on the side, and the high temperature supply header HD1 and the high temperature type terminal for heating are configured. The heater D is connected via a plurality of forward-side heat medium flow pipes 20 and the terminal D and the return header HD2 are connected via a plurality of return-side heat medium flow pipes 21 to generate heat. High temperature hot water as a medium is circulated and supplied to the high temperature type terminal device D.
[0019]
Similarly, a low temperature supply header HD3 as a heat medium connection joint is connectable to the discharge port 18a of the low temperature side heat medium passage LR provided on one end side of the low temperature outgoing path 18, and this low temperature By connecting the supply header HD3 and the low-temperature terminal not shown in the figure with a forward heat medium flow pipe, and connecting the low-temperature terminal and the return header HD2 with a return heat medium flow pipe, Low temperature hot water as a medium is circulated and supplied to a low temperature type terminal.
[0020]
That is, by driving the heat medium circulation pump 22 provided in the heat medium passage 17, the high temperature thermistor 15b provided in the high temperature forward path 15, the low temperature thermistor 18b provided in the low temperature forward path 18, and the heat medium return. The water supplied to the make-up water tank T from the water supply path 6 through the tank water supply path 23 based on the management of hot water flow based on the detection result of the return thermistor 16b provided in the path 16 is a heat exchanger for heating. 3, and is supplied to the high-temperature terminal D via the high-temperature forward passage 15, the high-temperature supply header HD 1, and the forward-side heat medium flow pipe 20, and bypasses the heating heat exchanger 3. The high temperature terminal D and the hot water from the low temperature terminal are returned to the low temperature terminal 18 and the low temperature supply header HD3. HD2 and heating medium return path 1 It is configured to be returned to the makeup water tank T through.
[0021]
The tank water supply passage 23 is provided with a make-up water valve 23a and a make-up water electromagnetic valve 23b. The make-up water tank T has an upper limit sensor 24a for detecting the upper limit of the water level and a lower limit sensor 24b for detecting the lower limit. And an overflow path 24c is connected.
In addition, the gas supply path 25 for supplying combustion gas to the gas burner 8 for heating the hot water supply heat exchanger 1 and the reheating heat exchanger 2 and the gas burner 19 for heating the heating heat exchanger 3 has an original gas electromagnetic wave. A valve 25a, a gas proportional valve 25b for hot water supply, a gas electromagnetic valve 25c, a gas switching electromagnetic valve 25d, a gas electromagnetic valve 25e for heating, a gas proportional valve 25f for heating, and the like are provided.
[0022]
Next, the high-temperature supply header HD1 and the return header HD2 and the joints attached to the headers HD1 and HD2 will be described. The high-temperature supply header HD1 and its joint, and the return header HD2 and its joint Since it is configured in exactly the same structure except that the flow direction of the medium is reversed, only the high-temperature supply header HD1 will be described, and the description of the return header HD2 will be omitted to avoid redundant description.
[0023]
As shown in FIGS. 2 and 3, the high-temperature supply header HD1 is provided with a straight cylindrical heat medium passage joint body 31, a straight tubular valve slide joint body 32, and an O-ring at the end. The whole is provided with a heat source side insertion portion 33 as a cylindrical heat source machine side connection portion and the like, and is configured in a T shape, and the entire T shape header is formed as an integrally molded product made of synthetic resin.
The heat medium flow joint body 31 has two cylindrical branch pipes 34 and their branches in a state in which the phases in the circumferential direction are the same and are aligned along the longitudinal direction of the cylinder. One cylindrical branch pipe 36 having a structure different from that of the pipe 34 and one cylindrical inspection pipe 38 are integrally formed of synthetic resin, and the two branch pipes 34 are described later. A connecting tool opening 35 is provided as a connecting tool main body connecting portion to which the forward-side heat medium flow pipe 20 is connected via a joint to be connected, and one branch pipe 36 has a stepped main body connecting portion. As shown, a stepped opening 37 is provided, and the inspection tube 38 is provided with an inspection opening 39 to which a supply pipe for supplying a later-described inspection fluid is connected. 35, the stepped opening 37 and the inspection opening 39 all have the same inner diameter. It has been.
[0024]
The inspection pipe 38 is disposed at a position close to the valve slide joint main body 32, and is located at the distal end of the branch pipe 36 adjacent to the inspection pipe 38, that is, at the distal end of the stepped opening 37. A fastener-shaped portion 37a for fasteners, which will be described later, is integrally formed, and the outer peripheral portion of the branch pipe 36, that is, the outer peripheral portion of the stepped opening 37 is externally fitted to the stepped opening 37. In order to prevent the heat medium flow pipe 20 attached to the head, a plurality of stepped portions 37b having a smaller diameter toward the tip end are integrally formed in a state of being arranged in the longitudinal direction of the stepped opening 37. .
A fastener hook 35a is integrally formed at the tip of the other two branch pipes 34, that is, the tip of the connector opening 35, but the step 37b as described above. Similarly, only the hook-shaped portion 39a for the fastener is integrally formed in the inspection opening 39 as well.
[0025]
Then, the large-diameter heat medium flow pipe 20 is externally fitted and connected to the stepped opening 37, and the connecting tool opening 35 has a diameter via a synthetic resin linear joint 40. A small heat medium flow pipe 20 is connected.
The linear joint 40 is an example of a pipe connection fitting that is fitted in the connection tool opening 35 in an internally fitted state, and an insertion portion 41 with an O-ring for fitting into the connection tool opening 35 is provided. In addition, a hook-shaped portion 41 a for a fastener is integrally formed at the base portion of the insertion portion 41. Further, on the opposite side of the insertion portion 41, a tube opening 42 is provided as a connection portion to which the heat medium flow tube 20 is fitted in an outer fitting state. A state in which a plurality of stepped portions 42b having a smaller diameter toward the distal end side by side are arranged in the longitudinal direction of the tube opening portion 42 in order to prevent the heat medium flow tube 20 attached to the opening portion 42 in an externally fitted state. Are integrally formed.
[0026]
In this embodiment, as shown in FIG. 8C, the 13A heating medium flow pipe 20 is externally fitted to the stepped opening 37 and is tightened and connected by the band BD. Yes. On the other hand, the straight joint 40 is connected to the connection tool opening 35, and the metal functions as a locking tool across the flange 41a of the joint 40 and the flange 35a of the connection tool opening 35. The fastener F made from the product is locked, and the 7 A heating medium flow pipe 20 is externally fitted and connected to the pipe opening 42 of the linear joint 40.
Then, in order to connect the heating medium flow pipe 20 of 7A to the stepped opening 37 corresponding to the heating system, as shown in FIG. The same linear joint 40 that is connected is connected to the stepped opening 37, and the fastener F is locked across the flange 41a of the linear joint 40 and the flange 37a of the stepped opening 37. The 7 A heating medium flow pipe 20 is externally fitted and connected to the pipe opening 42 of the linear joint 40.
[0027]
Further, in order to connect the 10A heating medium flow pipe 20, as shown in FIG. 8 (b), the 10A linear joint 40A is connected to the stepped opening 37 and the fastener F is externally fitted. Then, the 10A heating medium flow pipe 20 is externally fitted and connected to the pipe opening 42A of the 10A linear joint 40A.
The linear joint 40A for 10A and the linear joint 40 for 7A described above are configured to have exactly the same size with respect to the insertion portion 41 except that the outer diameters of the pipe openings 42A and 42 are different. Therefore, the 10 A heating medium flow pipe 20 can also be connected to the connector opening 35 using the 10 A linear joint 40A.
[0028]
The end opening 43 of the heat medium flow joint body 31 is also configured to have the same inner diameter as the connection tool opening 35 and the stepped opening 37, and the fastener flange 43a is integrally formed. Is formed.
In this embodiment, a sealing plug 44 having an O-ring is inserted into the end opening 43 and closed. However, if necessary, the L-shaped joint 45 shown in FIG. A fastener F is externally fitted to a flange-shaped portion 46a provided at the insertion portion 46 of the L-shaped joint 45 and a flange-shaped portion 43a provided at the end opening 43 to prevent the tube from coming off. The heat medium flow pipe 20 can be externally connected to the pipe opening 47 provided with 47b.
This L-shaped joint 45 is also available for 7A and 10A, and is configured so that it can be properly used as necessary.
[0029]
At the back of the inspection opening 39 provided in the inspection tube 38, as shown in an enlarged view in FIG. 6, a check valve made of an elastic body such as rubber having a flow hole 48a at the tip. 48 is accommodated and attached by a stopper 49, and the inspection opening 39 is connected to the drain 14a of the joint 14 provided in the bath passage 11 as shown by the one-dot chain line in FIG. The supply pipe 50 is configured to be connectable.
As shown in FIG. 7, the supply pipe 50 has a drain adapter 50a connected to the drain 14a at one end and a plug for connecting the other end to the inspection opening 39 in an internally fitted state. By providing the insertion portion 50b and connecting the bath passage 11 and the inspection opening 39 via the supply pipe 50, water as the inspection fluid can be supplied from the bath passage 11 to the high-temperature supply header HD1. It is configured as follows.
[0030]
That is, when water as the inspection fluid is supplied from the bathway 11, the check valve 48 in the state shown in FIG. 6 (a) has its water pressure as shown in FIG. And the flow hole 48a expands with the expansion, allowing water to flow only from the inspection opening 39 into the high-temperature supply header HD1, and from inside the supply header HD1. It is comprised so that the flow of the water to the opening 39 for an operation | movement may be blocked | prevented.
[0031]
A valve seat 33a is provided at the end of the heat source side insertion portion 33 on the valve slide joint main body 32 side, and a switching valve 51 is constituted by a valve body 51a that can contact the valve seat 33a. The valve body 51a is provided with a hollow operation cylinder 51b and an operation part 51c provided at an end of the operation cylinder 51b, and the valve body 51a is integrally formed of a heat-resistant synthetic resin, and is used for valve sliding. It is slidably movable along the joint body 32 and is attached so as to be rotatable around an axis along the sliding direction.
[0032]
As shown in FIG. 5, the Z-shaped guide groove 52 is provided in the operation cylinder 51b so as to face each other in a state where the positions are different by 180 degrees. As shown in FIG. 4, the spring pin 53 is attached to the valve slide joint body 32 so as to pass through the opposing guide grooves 52.
The guide groove 52 includes a linear groove 52a, a lower inclined groove 52b communicating with the lower end of the linear groove 52a, and a lower locking groove 52c communicating with the lower inclined groove 52b. The upper inclined groove 52d communicating with the upper end of the groove 52a and the upper locking groove 52e communicating with the upper inclined groove 52d are also provided.
[0033]
Then, by sliding the operating portion 51c downward, as shown in FIG. 2, the valve body 51a is separated from the valve seat 33a, and the spring pin 53 is positioned at the upper end of the linear groove 52a. 51 will be in the state corresponding to a heat medium flow state. Thereafter, by rotating the operation portion 51c in the right direction, the switching valve 51 is slightly slid to the heat medium flow state side by the action of the upper inclined groove 52d, and the spring pin is placed in the upper locking groove 52e. 53 is positioned, the switching valve 51 is prevented from sliding to the inspection state side, and the flow side engagement state is established.
That is, the valve body 51a of the switching valve 51 is separated from the valve seat 33a of the heat source side insertion portion 33, and the heat source side insertion portion 33 and each of the openings 35 and 37 are connected to each other. The operation is switched to the heat medium flow state supplied to each terminal D through the openings 35 and 37 and the heat medium flow pipe 20.
[0034]
In order to switch the switching valve 51 in the heat medium flow state to the inspection state, the operation portion 51c is rotated to the left to release the above-described flow-side engagement state, and the operation portion 51c is moved upward. Slide to. Then, as shown in FIG. 3, the spring pin 53 is positioned at the lower end of the linear groove 52a, and the switching valve 51 is in a state corresponding to the inspection state. Thereafter, by turning the operation portion 51c to the left, the switching valve 51 is slightly slid to the inspection state side by the action of the lower inclined groove 52b, and the spring pin 53 is positioned in the lower locking groove 52e. Then, the switching valve 51 is prevented from sliding to the heat medium flow state side and is brought into the inspection side engagement state.
That is, the valve body 51a of the switching valve 51 comes into contact with the valve seat 33a, the communication between the heat source side insertion portion 33 and each of the openings 35 and 37 is cut off, and the supply pipe 50 is connected to the inspection opening 39. The supplied water as the inspection fluid is switched to the inspection state supplied to each terminal device D via the check valve 48, the openings 35 and 37, and the heat medium flow pipe 20.
[0035]
In FIG. 3, in order to simultaneously indicate the state corresponding to the inspection state of the switching valve 51 and the inspection state, the spring pin 53 is positioned at the lower end of the linear groove 52a. Although the valve body 51a of the switching valve 51 is in contact with the valve seat 33a, actually, when the spring pin 53 is positioned at the lower end of the linear groove 52a, the valve body 51a is separated from the valve seat 33a. It will be located a little away.
[0036]
With the above configuration, in the heating system, the heat source side insertion portion 33 of the high-temperature supply header HD1 is internally fitted and connected to the discharge port 15a of the high-temperature outgoing path 15, and the fastener F is externally fitted. The forward-side heat medium flow pipe 20 of 13A is externally connected to the attached opening 37, and the forward-side heat medium flow pipe 20 of 7A is connected to the connection tool opening 35 via the linear joint 40.
And although explanation was omitted, the heat source side insertion portion 33 of the return header HD2 is fitted and connected to the return port 16a of the heat medium return path 16, and the return side of 13A is connected to the stepped opening 37 of the return header HD2. The heat medium flow pipe 21 is externally fitted, and the return-side heat medium flow pipe 21 of 7A is connected to the connector opening 35 via the linear joint 40.
[0037]
Accordingly, the hot hot water from the high temperature outgoing path 15 is divided into a plurality of parts by the high temperature supply header HD1 and supplied to each high temperature type terminal D via the outgoing side flow pipe 20, and each terminal D The hot water is supplied to the return header HD2 through the return side flow pipe 21, joined by the return header HD2, and returned to the makeup water tank T through the heat medium return path 16. .
[0038]
Although the description is omitted, the same applies to the low temperature type terminal device side, and the low temperature supply header HD3 is connected to the discharge port 18a of the low temperature outgoing path 18, and the supply header HD3 and the terminal device are connected to the outgoing heat medium. By connecting the flow pipe and connecting the terminal and the return header HD2 to the return side heat medium flow pipe, the low-temperature hot water from the low-temperature forward path 18 is transferred from the low-temperature supply header HD3 to the low-temperature terminal. The hot water from the low-temperature terminal is returned to the make-up water tank T via the return header HD2 and the heat medium return path 16.
In this case, in the return header HD2, the L-side joint 45 is attached to the end opening 43 of the heat medium flow joint body 31, and the return heat medium flow pipe from the low temperature type terminal is connected. To do.
[0039]
In this heating system, in order to perform an airtight inspection on the terminal D side after installing a high temperature type terminal D, the hot water supply / discharge port of the adapter 5a of the bathtub 5 is closed as shown in FIG. A plug member 5d with a safety valve is attached and a supply pipe 50 is connected to one of the high-temperature supply header HD1 and the return header HD2, or the inspection opening 39 of the supply header HD1 in this embodiment, for inspection. The opening 39 is connected in communication with the water draining portion 14 a of the bath going path 11.
Then, both the switching valve 51 of the high temperature supply header HD1 and the switching valve 51 of the return header HD2 are switched to the heat medium flow state to open the safety valve of the plug member 5d and open the hot water solenoid valve 12a. Then, water is supplied from the hot water filling path 12 to the remedy system and the supply pipe 50 so that the remedy system and the supply pipe 50 are filled with water and air is vented.
[0040]
Next, the safety valve of the plug member 5d is closed, the tank water supply passage 23 is opened, the heat medium circulation pump 22 is driven, and the heat medium flow pipe 20 for the high temperature side heat medium passage HR and the terminal unit D of the heat source unit C, When the set time elapses after the lower limit sensor 24b of the makeup water tank T enters the detection state, the water supply is stopped and the heat medium flow pipes 20 and 21 for the terminal device D are filled with water. At the same time, the air of the heat medium flow tubes 20 and 21 is removed. That is, the internal air of the heat medium flow tubes 20 and 21 is caused to flow out of the makeup water tank T through the high temperature side heat medium passage HR.
When the air venting is completed, both the switching valve 51 of the high temperature supply header HD1 and the switching valve 51 of the return header HD2 are switched to the inspection state, and water from the bathway 11 is supplied for high temperature through the supply pipe 50. This is supplied to the header HD1, and the water pressure in the heat medium flow pipes 20 and 21 with respect to the terminal device D is increased by the water supply until the water pressure sensor 10a provided in the bath return path 10 reaches a set pressure.
[0041]
Then, after pressurizing to the set pressure, the pressurization operation is stopped, and the water level sensor 10a of the bath return path 10 detects the presence or absence of the pressure drop or detects the speed of the pressure drop, thereby significantly reducing the pressure. If there is no sudden pressure drop, it is determined that the heat medium flow tubes 20 and 21 in the terminal D are in a good airtight state.
When this airtight inspection is completed, the supply pipe 50 is removed from the high-temperature supply header HD1, and is closed with a sealing plug or the like as shown in FIG. The switching valve 51 of the return header HD2 is also switched to the heat medium flow state.
[0042]
As for the airtight inspection on the low temperature type terminal side, the supply pipe 50 is connected to one of the inspection opening portions of the low temperature supply header HD3 and the return header HD2, and the others are the high temperature type terminals. The same as the airtight inspection on the container D side.
When the high temperature type terminal device D and the low temperature type terminal device are connected together, the supply pipe 50 is connected to the inspection opening 39 of the return header HD2, and the high temperature type terminal device D side is connected. And a low-temperature terminal can be tested at the same time.
[0043]
[Another embodiment]
(1) In the previous embodiment, an example in which one stepped opening 37 and two connection tool openings 35 are provided for the heat medium flow joint body 31 is shown. About the number of the part 37 and the opening part 35 for connection tools, it can change and implement variously. In an extreme case, only one stepped opening part 37 is provided with respect to the heat-medium-flow joint body 31. It can also be provided.
[0044]
(2) In the previous embodiment, an example in which the step 42b for retaining is provided in the pipe openings 42, 42A of the linear joints 40, 40A as the connection tool has been shown. However, the step 42b is not necessarily provided. It is not necessary, and for example, after the heat medium flow pipe is fitted around the pipe openings 42 and 42A, the heat medium flow pipe can be connected with a band or the like.
[0045]
(3) In the previous embodiment, the heating medium flow joint body 31, the valve slide joint body 32, the heat source side insertion section 33, the both openings 35 and 37, the inspection opening 39, and each Although an example in which all of the shape portions 35a, 37a, 39a, 43a and the stepped portion 37b are integrally formed with a synthetic resin has been shown, they may be integrally formed with a material other than the synthetic resin, for example, ceramic.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of an entire heating system.
[Fig. 2] Cross-sectional view of the header with a part cut away
FIG. 3 is a partially cutaway cross-sectional view of a header.
FIG. 4 is a cross-sectional view of the main part of a switching valve
FIG. 5 is an exploded view of the main part of the switching valve.
FIG. 6 is a cross-sectional view of a check valve
FIG. 7 is an explanatory diagram of a supply pipe for inspection fluid
FIG. 8 is an explanatory diagram of a linear joint
[Explanation of symbols]
31 Fitting body
35 Main unit connection for connector
35a bowl
37 Stepped body connection
37a bowl
37b Step
40 Connector for pipe connection
41a bowl
42 connections
42b Step
F Locking tool
HD1, HD2, HD3 Heating medium connection joint

Claims (4)

継手本体に筒状の本体接続部を備えさせた熱媒用接続継手であって、
前記本体接続部の外周部に、それに外嵌状態に装着される管の抜け止めのために、本体接続部先端側ほど小径となる複数の段部が、本体接続部長手方向に並べて設けられ、
前記本体接続部の先端部に、その本体接続部に内嵌状態で装着される管接続用の接続具の抜け止めのために、その接続具の鍔状部に係止させた係止具を係止させる鍔状部が設けられている熱媒用接続継手。
It is a connection joint for a heat medium in which a joint body is provided with a tubular body connection part,
In order to prevent the tube attached to the outer periphery of the main body connection portion from being detached, a plurality of stepped portions having a smaller diameter toward the front end side of the main body connection portion are provided side by side in the longitudinal direction of the main body connection portion,
At the tip of the main body connection portion, a locking tool that is locked to the hook-shaped portion of the connection tool is provided to prevent the connection tool for pipe connection attached to the main body connection portion in an internally fitted state. A connection joint for a heat medium provided with a hook-shaped portion to be locked.
前記接続具に設けられた管接続用の接続部に、それに外嵌状態に装着される管の抜け止めのために、接続部先端側ほど小径となる複数の段部が、接続部長手方向に並べて設けられている請求項1に記載の熱媒用接続継手。In order to prevent the pipe attached to the fitting portion connected to the pipe connecting portion provided in the connector from coming off, a plurality of stepped portions having smaller diameters toward the distal end side of the connecting portion are arranged in the longitudinal direction of the connecting portion. The joint for heat medium according to claim 1, which is provided side by side. 前記本体接続部が、前記継手本体の長手方向に並べて複数個設けられ、
その複数個の本体接続部の一部が、前記段部と鍔状部とを備えた段部付き本体接続部に構成され、
他のものが、前記段部と鍔状部のうちの鍔状部のみを備えて、その本体接続部に内嵌状態で装着される接続具専用の接続具用本体接続部に構成されている請求項1または2に記載の熱媒用接続継手。
A plurality of the main body connection portions are provided side by side in the longitudinal direction of the joint main body,
A part of the plurality of main body connection portions is configured as a main body connection portion with a step portion including the step portion and the bowl-shaped portion,
The other is provided with only a hook-shaped portion of the stepped portion and the hook-shaped portion, and is configured as a connector main body connecting portion dedicated to a connector that is mounted in the main body connecting portion in an internally fitted state. The connection joint for heat media of Claim 1 or 2.
前記継手本体、本体接続部、段部、ならびに、鍔状部の全てが、合成樹脂にて一体的に形成されている請求項1〜3のいずれか1項に記載の熱媒用接続継手。The joint for heat medium according to any one of claims 1 to 3, wherein all of the joint main body, the main body connecting portion, the stepped portion, and the bowl-shaped portion are integrally formed of synthetic resin.
JP10795499A 1999-04-15 1999-04-15 Connection joint for heat medium Expired - Fee Related JP3992398B2 (en)

Priority Applications (1)

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JP10795499A JP3992398B2 (en) 1999-04-15 1999-04-15 Connection joint for heat medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10795499A JP3992398B2 (en) 1999-04-15 1999-04-15 Connection joint for heat medium

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JP2000304289A JP2000304289A (en) 2000-11-02
JP3992398B2 true JP3992398B2 (en) 2007-10-17

Family

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Family Applications (1)

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