JP3698646B2

JP3698646B2 - Different diameter coupling joint

Info

Publication number: JP3698646B2
Application number: JP2001022686A
Authority: JP
Inventors: 沢成大山; 賢一新谷
Original assignee: Miyairi Valve Mfg Co Ltd
Current assignee: Miyairi Valve Mfg Co Ltd
Priority date: 2001-01-31
Filing date: 2001-01-31
Publication date: 2005-09-21
Anticipated expiration: 2021-01-31
Also published as: JP2002228070A

Description

【０００１】
【発明の属する技術分野】
本発明は、流体継手に係り、特に、液化石油ガスを配送するタンクローリーのホースに設けた接続継手に必要に応じて装着させて使用する異径連結継手に関するものである。
【０００２】
【従来の技術】
高圧流体、特に液化石油ガス（以下ＬＰガスという）は、所定個所に設置した貯槽タンクに貯留されているが、各貯槽タンクには、定期または不定期にタンクローリーによりＬＰガスを配給している。タンクローリーから貯槽タンクにＬＰガスを供給するには、貯槽タンクに設けた液取入弁のプラグ部に、タンクローリーのタンク（図示せず）に連結するホースに取付けた接続継手を連結して行っている。この貯槽タンクに設けた液取入弁の口径、また、タンクローリのホースの先端に取付けた接続継手の口径は、該貯槽タンクを設置する場所やタンクの貯留量などにより、大小相違する場合がある。
【０００３】
図１は、貯槽タンク１の壁面に取付けたマルチバルブを構成する第１の液取入弁３に内蔵した第１の開閉弁Ａと、停止弁４ａを内蔵したプラグ部４と、タンクローリー（図示せず）に連なるホース９の端部に具えた接続継手１０の一端に装着して前記プラグ部４と合致する口径をしたソケット部１９とを着脱可能に連結して、貯槽タンク１にＬＰガスを供給している。１１は液取入弁３に内蔵した前記第１の開閉弁Ａを開閉させる第１のハンドル、１２は接続継手１０に内蔵した第２の開閉弁Ｂを開閉させる第２のハンドルである。
【０００４】
この接続継手１０は、図４に示すごとく、第２のハンドル１２の基部にそれぞれ作動軸１３を同一直線上に軸支させ、該作動軸に設けた偏心突起１４を該接続継手の内部に前後動可能に収容した可動筒部１５の外面に設けた係合凹部１５ａに係合させてある。そのため、第２のハンドル１２を回動させると可動筒部１５は軸線方向に前後動し、該可動筒部の内端部に軸支させた弁棒１６の先端に軸着した弁部１７も同時に前後動する。該可動筒部１５内に収容してばねで前方に弾発されている弁筒体１８の先端は、前記弁部１７の周面部分の背面に当接して密封している。前記弁部１７と弁筒体１８の先端とで形成した第２の開閉弁Ｂを密封してある。
【０００５】
図２は、前記プラグ部４より小径なプラグ部４ｈを有した第２の液取入弁３ｈ内に第３の開閉弁Ｃを内蔵して形成したマルチバルブを貯槽タンク１の壁面に取付けた実施例で、この第２の液取入弁３ｈ内には停止弁４ａを収容してある。この第２の液取入弁３ｈのプラグ部４ｈと、該プラグ部と合致する口径をしたやや小径な接続継手１０ｈのソケット部１９ｈとを着脱可能に連結して貯槽タンク１内にＬＰガスの供給を行っている。この接続継手１０ｈはタンクローリーに連なるやや小径のホース９に連結して第４の開閉弁Ｄを内蔵している。図中、１１ｈは前記第３の開閉弁Ｃを開閉させる第３のハンドル、１２ｈは接続継手１０ｈ内に前後動可能に収容した可動筒部と該可動筒部内に軸支した弁棒を軸心方向に前後動させるハンドルで、通常は閉口状態に位置してある。
【０００６】
前記のごとく、ＬＰガスを配給するタンクローリーは、例えば、ホース９の端部に具えた接続継手１０、１０ｈのソケット部１９、１９ｈと、タンク１側の液取入弁３、３ｈに設けたプラグ部４、４ｈの口径とがそれぞれ合致する場合は問題ない。しかし、タンクローリー側のソケット部１９が大径で、タンク１側の液取入弁３ｈに設けたプラグ部４ｈが小径の場合、または、その逆の場合、口径が相違するためそのままではホースを接続することはできず、せっかくタンクローリーでＬＰガスを配送しても、該ＬＰガスを貯槽タンク１に供給することができなかった。
【０００７】
そこで、接続継手のソケット部の口径と液取入弁のプラグ部の口径とが相違する場合、図３、４に示した異径管継手２０を用いて接続を行っている。この異径管継手２０は、一方（右端）に前記接続継手１０または１０ｈとそれぞれ接続する連結プラグ２１を設け、他方（左側）には、貯槽タンク１に設けた液取入弁３または３ｈとそれぞれ接続する連結ソケット３０を設けてあり、該連結プラグ２１と連結ソケット３０とを、連結筒３７およびアダプタ３８を用いて連結して形成してある。このアダプタ３８には、異径管継手２０内に残留するＬＰガスを放出させるためのブローバルブ３９を設けてある。
【０００８】
この異径管継手２０の一方（右端）を構成する、例えば、大径な連結プラグ２１は、プラグ筒２２の先端に設けた弁口２２ａを開閉する弁部２３ａを内蔵し、弁杆２３の先端に軸着して該プラグ筒２２の後端に取付けたプラグ後部２４の内部にばねの弾発力により前後動可能に装着し、該プラグ後部２４の他端には前記アダプタ３８を固着してある。
【０００９】
２５はばねを弾発させてプラグ筒２２の外側に前後動可能に装着させたスリーブで、前記ソケット部１９に装着したロックボール１９ａを該プラグ筒２２の外周に形成した凹入部２２Ｃに固定して、異径管継手２０の連結プラグ２１を接続継手１０に固着する。Ｅは弁口２２ａと弁部２３ａとで構成した開閉可能な第５の開閉弁である。
【００１０】
図３、４において、異径管継手２０の他方（左端）を構成する連結ソケット３０は、筒本体３１内に前後動可能に収容した可動筒３２に、貯槽タンク１に取付けた第２の液取入弁のプラグ部４ｈ（図２）と連結する小径な受筒部３５を設けてある。可動筒３２の後端（右側端）には、前記連結筒３７を連結させる後部体３６を固着してある。
【００１１】
また、可動筒３２の内部には、後端を軸支させた弁棒３３の先端に設けた弁体３３ａをばねで弾発させて前後動可能に収容した内筒体３４の先端（左側端）の弁口３４ａに開閉可能に当接してある。この弁体３３ａと弁口３４ａとで第６の開閉弁Ｆを構成し、該開閉弁Ｆの開閉を操作する第６のハンドル１２ｉを一体的に設けてある。
【００１２】
この異径管継手２０を用いてＬＰガスをタンクローリーから小口径の液取入弁３ｈを有した貯槽タンク１に供給する場合、ホースの一端に予め接続継手１０に異径管継手２０を接続、または、使用時に接続する。この接続継手１０のハンドル１２は、予め開弁方向に位置し、開閉弁Ｂ、Ｅは開口され、開閉弁Ｆのみが閉口している。
図４に示す如く、異径管継手２０の連結ソケット３０を、図２に示した液取入弁３ｈのプラグ部４ｈに接続する。次いで、ハンドル１２ｈを開弁操作すると可動筒３２と共に弁棒３３が左側にスライドする。弁棒３３と共にスライドした可動筒３２はプラグ部４ｈの先端と当接して停止し、弁棒３３のみが前進して停止弁４ａを後退させることにより開閉弁Ｆと停止弁４ａを開口させて連通し、ＬＰガスを貯槽タンク１に供給する。
【００１３】
ＬＰガスの供給終了後は、ハンドル１２ｉを操作して閉弁させた後、スリーブ５ｈをスライドさせてプラグ部４ｈのロックを解除して連結ソケット３０を離脱させることにより作業が終了する。
【００１４】
異径管継手２０を液取入弁３ｈのプラグ部４ｈから離脱させた後、接続継手１０のハンドル１２を逆回動させて第２の開閉弁Ｂを閉弁し、次いで、ブローバルブ３９を開けて異径管継手内の残留ガスを大気中に放出する。その後、連結プラグ２１のスリーブ２５をスライドさせて接続継手１０のソケットから離脱させて異径管継手２０を所定個所へ収納している。
【００１５】
【発明が解決しようとする課題】
しかし、この異径管継手２０には、タンクローリのホース９に具えた接続継手１０と接続する連結プラグ２１を一方に有し、また、貯槽タンク１に装着した液取入弁３のプラグ部４と連結する連結ソケット３０を他方に設け、該連結ソケットの後部体３６と前記連結プラグ２１とを、連結筒３７とアダプタ３８を用いて直線上に螺合させて連結してあるので、全体形状が必然的に長い寸法に構成されていた。しかも、アルミニウム、黄銅または鉄鋼などの金属製の前記後部体、連結筒、アダプタを有した異径管継手は長くて重量があるため落とした衝撃で異径管継手が破損しやすく取り扱いが不便であった。さらには、ブローバルブ３９の操作忘れによる残留ガスの抜き忘れや、異径管継手の一部を構成するハンドル１２ｉや、ハンドル１２ｈは、ホースの巻取り作業中に手や収納箱の蓋などに接触し、誤作動により開閉弁を閉弁する虞があり非常に危険である。
また、異径管継手の一端（右端）に位置する弁部２３ａとプラグ筒の弁口２２ａとからなる第５の開閉弁Ｅとの間の距離Ｌの内部にＬＰガスが残留した状態で、タンクローリーが走行して各所に設置した貯槽タンクにＬＰガスを順次配給すると、夏季等の炎天下にあっては、該異径管継手２０内に残留したＬＰガスが熱膨張により内圧が上昇する。そのため、異径管継手内に残留したＬＰガスは、大気温度の上昇により内圧が上昇し異径管継手を破壊させるおそれがある。
【００１６】
本発明は、異径管継手内に残留した高圧流体を、該流体の供給が終了したら大気中に安全確実に排出させて熱膨張による継手の破損を防止し、且つ、異径管継手全体をコンパクトに軽量化することを目的とする。
【００１７】
【課題を解決するための手段】
請求項１の発明は、一端に設けた挿入筒４２は、外周にばね８８を弾発させて摺動可能に装着させたスリーブ８５を有した筒本体４１の一端に設けて中間外周にボール溝４２ｂを設けると共に、先端内面に軸方向にやや長く形成した凹入溝４２ｃを形成し、前記挿入筒４２内に進退動可能に収容した可動筒６５の先端には、開口部を切欠いた溝又は半径方向に設けた孔などからなる流路６７ａを設けると共に該可動筒６５の先端外周面には挟径部６７ｂを設け、前記挿入筒４２の先端内周面と可動筒６５の外周面との間に隙間Ｙを形成し、他端に筒受部４３を形成した筒本体４１の外周に前記スリーブ８５を装着し、該筒受部には周面に設けたテーパー孔５５にロックボール５６を装着させて設けたプラグ受部５２を取付け、該プラグ受部５２に連通する通孔内に内側筒５９をばね７０で弾発して摺動可能に収容し、前記筒本体４１の挿入筒４２内に進退動可能に収容してばね７１で弾発させた前記可動筒６５の内端部に切欠孔６５ｃを設けると共に、後部を軸着させて前記内側筒５９を貫通させた弁杆６２の先端に取付けた弁部６３と前記内側筒５９の先端とを開閉可能に当接させて開閉弁Ｘを設け、該筒本体４１に半径方向に設けたねじ孔７５の下端に該筒本体４１の内部に連通するポート７６を設け、該ねじ孔７５の下部に一端を連通して他端を外部に開口させたガス抜孔７９を形成し、前記ねじ孔７５に栓体８１を螺合させてなることを特徴とする。
請求項２の発明は、一端に設けた挿入筒４２は、外周にばね８８を弾発させて摺動可能に装着させたスリーブ８５を有した筒本体４１の一端に設けて中間外周にボール溝を設けると共に、先端内面に軸方向にやや長く形成した凹入溝４２ｃを形成し、前記挿入筒４２内に進退動可能に収容した可動筒６５の先端には、開口部を切欠いた溝又は半径方向に設けた孔などからなる流路６７ａを設けると共に該可動筒６５の先端外周面には挟径部６７ｂを設け、前記挿入筒４２の先端内周面と可動筒６５の外周面との間に隙間Ｙを形成し、他端に筒受部４３を形成した筒本体４１の外周に前記スリーブ８５を装着し、該筒受部には周面に設けたテーパー孔５５にロックボール５６を装着させて設けたプラグ受部５２を取付け、該プラグ受部５２に連通する通孔内に内側筒５９をばね７０で弾発して摺動可能に収容し、前記筒本体４１の挿入筒４２内に進退動可能に収容してばね７１で弾発させた前記可動筒６５の内端部に切欠孔６５ｃを設けると共に、後部を軸着させて前記内側筒５９を貫通させた弁杆６２の先端に取付けた弁部６３と前記内側筒５９の先端とを開閉可能に当接させて開閉弁Ｘを設け、該筒本体４１に半径方向に設けたねじ孔７５は、下端に該筒本体４１の内部に設けた通孔に連通するポート７６を形成し、該ねじ孔７５の下部側面には外部に連通するガス抜孔７９を設け、前記ねじ孔７５に螺合させる栓体８１の下端には、前記ポートを開閉する弁部を形成し、該栓体８１を前記ねじ孔７５から突出させて着脱可能に螺合させ、前記筒本体の外周に装着させたスリーブ８５のストッパー機能を設けたことを特徴とする。
【００１８】
前記挿入筒は、外周にばねで弾発させて摺動可能に装着させたスリーブを有した筒本体の一端に設けて中間外周にボール溝を設けると共に、先端内面に軸方向にやや長く形成した凹入溝を形成し、該挿入筒内に進退動可能に収容した可動筒の先端には、開口部を切欠いた溝又は半径方向に設けた孔などからなる流路を設けると共に該可動筒の先端外周面に挟径部を設け、前記挿入筒の先端内周面と可動筒の外周面との間に隙間を形成してある。
【００１９】
前記筒本体に設けたねじ孔は、下端に該筒本体の内部に設けた通孔に連通するポートを形成し、該ねじ孔の下部側面には外部に連通するガス抜孔を設け、前記ねじ孔に螺合させる栓体の下端には、前記ポートを開閉する弁部を形成し、該栓体を前記ねじ孔から突出させて着脱可能に螺合させ、前記筒本体の外周に装着させたスリーブのストッパー機能を設けてある。
【００２０】
したがって、送液中の連結継手の離脱を防止することができると共に、送液終了後の連結継手内に残留したＬＰガスを簡単で安全に大気中に排出させることができる。
【００２１】
【発明の実施の形態】
本発明の実施形態を図面により説明すると、図５に示した異径連結継手４０は、図１に示した接続継手１０の先端内部に設けたソケット部１９に挿入させる挿入筒４２を筒本体４１の一端に形成し、他端に筒受部４３を設けてある。この筒受部４３の内側壁面に設けた雌ねじ部４６に、前記筒受部４３内に位置したプラグ受部５２の外周面に形成した雄ねじ部５３を螺合させ、該プラグ受部５２の内部中心に小径な通孔５７を設けてある。プラグ受部５２の周面には複数のテーパー孔５５を一定間隔ごとに貫通して設け、該テーパー孔内にプラグ受部５２の肉厚より長い寸法のロックボール５６を遊嵌させてある。
【００２２】
前記通孔５７内に内側筒５９を摺動可能に収容し、該内側筒の外周面に複数のシールリング６０を装着して通孔５７と内側筒５９とを気密にしてある。該内側筒の端面５９ａに、開閉可能に着座させる弁部６３を先端に固着させた弁杆６２の後端を、前記挿入筒４２内に摺動可能に収容した可動筒６５の内端部に軸支させてある。可動筒６５の内端には切欠孔６５ｃを設けてあり、可動筒６５と前記内側筒５９との間に小ばね７０を弾発して装着し、内側筒の端面５９ａと弁部６３の背面とで第７の開閉弁Ｘを設けてある。
【００２３】
外周中間に鍔部６６を設けた可動筒６５を、前記筒本体４１内に進退動可能に収容し、該鍔部６６を前記挿入筒４２の内面に設けた段部４９と掛止するように位置させて、該挿入筒の先端側にばね７１で弾発してある。可動筒６５の外周にシールリング６８を装着して挿入筒４２との間を気密にしてある。また、可動筒６５の先端には、開口部を切欠いた溝又は半径方向に設けた孔などからなる流路６７ａを設け、同じく可動筒６５の先端外周面には外径をやや狭くした挟径部６７ｂを設け、前記挿入筒４２の先端内周面と可動筒６５の外周面との間に隙間Ｙを形成してある。
【００２４】
筒本体４１の中間部に半径方向に貫通して設けたねじ孔７５の内端に小径のポート７６を形成し、弁本体４１の外部に通じるガス抜孔７９をねじ孔７５の下部に連通して形成してある。このねじ孔７５に着脱可能に栓体８１を取付け、該栓体の下端には前記ポート７６を閉じる弁部を設けてあり、該栓体は前記ねじ孔７５に螺合して後記するスリーブ８５のストッパー機能を有している。
【００２５】
８５は筒本体４１の外周面に摺動可能に取付けたスリーブで、該筒本体の中間外周面に設けた掛止鍔部４１ａと、スリーブ８５の中間内周面に設けた掛止段部８６との間にばね８８を弾発して収容してある。８９は、スリーブ８５の一端内周面に掛止させた止リングで、筒本体４１の外周に設けた掛止鍔部４１ａを掛止させて、該筒本体からスリーブ８５が脱出するのを防止している。
【００２６】
以下、本発明に係る実施形態の作用について図５、６により説明すると、図５に示す異径連結継手４０を用いて小径な液取入弁３ｈ（図２参照）と、接続継手１０（図１参照）を接続させる場合、筒本体４１に設けたねじ孔７５から栓体８１を外し、ばね８８に抗してスリーブ８５を図６に示す矢印方向に後退させた状態で、筒本体の挿入筒４２を接続継手１０のソケット部１９内に挿入させる。
【００２７】
ソケット部１９に装着したロックボール１９ａは、進入する挿入筒４２により半径方向に押出され、該挿入筒の先端面が接続継手１０の弁筒体１８の先端面に当接している弁部１７と突合する。それと同時に、前記ロックボールは挿入筒４２の外周面に設けたボール溝４２ｂと係合し、スリーブ８５から手を離すとばね８８の弾発力により前進したスリーブでロックボールを半径方向に固定し、ソケット部１９を具えた接続継手１０と、挿入筒４２を有した異径連結継手４０とを連結する（図７）。
【００２８】
図５、７に示すように、筒本体４１のねじ孔７５に栓体８１を螺着してポート７６を閉鎖すると、栓体８１は筒本体４１の外周面から突出していてスリーブ８５の一端に位置するため該スリーブ８５の移動を阻止し、連結継手４０が接続継手１０から離脱するのを防止している（図７）。
【００２９】
次いで、図６に示した液取入弁３ｈのプラグ部４ｈに装着したスリーブ５をばね６に抗して後退させ、プラグ部４ｈの先端を連結継手４０のプラグ受部５２内に挿入させると、該プラグ受部の周面に装着したロックボール５６が、プラグ部４ｈの外周面に設けたボール溝４ｂに係合する。すると、ばね６の弾発力により前進したスリーブ５で前記ロックボール５６を押圧固定し、プラグ受部５２とプラグ部４ｈを連結させる（８図）。この場合、プラグ部４ｈに内蔵した停止弁４ａは、ばねで該プラグ部の先端に設けた弁口に着座して閉じている。
【００３０】
前記異径連結継手４０を用いて、貯蔵タンク１に設けた小径の液取入弁３ｈとタンクローリーのホース９に連なる大径の接続継手１０とを図８に示すように連結させた後、接続継手１０のハンドル１２を回動させると、該ハンドルを軸着させた作動軸１３が回動し、該作動軸に設けた偏心突起１４を介して可動筒部１５をソケット部１９方向に前進させる。次いで、弁棒１６の弁部１７が前進して可動筒の端面と突合すると、可動筒６５は後退して流路６７ａが凹入溝４２ｃを介して第２の開閉弁Ｂを閉弁する（図９）。
【００３１】
可動筒６５が左側に前進すると、該可動筒と共に弁部６３が前進し、弁部６３が密着している内側筒５９から離れて第７の開閉弁Ｘを開弁させる。これと同時に、液取入弁３ｈのプラグ部４ｈの弁口に着座している停止弁４ａが前記弁部６３に押圧されて該弁口を開弁し、液取入弁３ｈと接続継手１０とは異径連結継手４０を介して連通する。そのため、液取入弁３ｈに内蔵した第３の開閉弁Ｃに連動するハンドル１１ｈ（図２）を操作して開弁させると、タンクローリーからの液化ＬＰガスは、ホース９と接続継手１０と異径連結継手４０と液取入弁３ｈとを介して貯槽タンク１に供給できる（図９）。
【００３２】
第２の液取入弁のプラグ部４ｈから異径連結継手４０を離脱させるには、最初に接続継手１０のハンドル１２を閉弁方向（右側方向）に操作すると、可動筒部１５と共に弁棒１６が同じ方向に移動して弁部１７で第２の開閉弁Ｂを閉弁し、且つ、該弁棒の弁部１７に押圧されていた可動筒６５が、ばね７１の弾発力により移動（右側方向）して弁棒６２の弁部６３で第７の開閉弁Ｘを閉弁させる（図８）。
【００３３】
次いで、プラグ部４ｈに装着したスリーブ５をばねに抗して貯槽タンク１側（左側）に後退させると、プラグ受部に装着したロックボール５６がフリーとなってプラグ部４ｈに設けた凹入部４ｂから外れて該プラグ受部５２を分離させることができる。
【００３４】
図７の状態は、異径連結継手４０内、即ち、第７の開閉弁Ｘと第２の開閉弁Ｂとの間の距離Ｍの内部にＬＰガスが残留したままの状態である。ＬＰガスが封入された異径連結継手４０を接続継手１０に接続したままの状態でタンクローリーが移動して大気温度の上昇によりＬＰガスの内圧が上昇すると、ガス圧は可動筒６５の先端に設けた挟径部６７ｂの隙間Ｙから接続継手１０の弁筒体１８を押圧する。ガス圧に押圧された弁筒体１８は、ばねの弾発力に抗して後退して開閉弁Ｂを開口してホース側に連通してガス圧を逃がすことができる。
【００３５】
異径連結継手４０と接続継手１０とを分離する場合は、筒本体４１に軸心方向と直角方向に設けたねじ孔７５に螺合させた栓体８１を回動して弛めてポート７６を開放する（図１１）と、該ねじ孔７５に連通した小径のガス抜孔７９から該異径連結継手４０内に残留したＬＰガスは圧力変化により気化しながら排出させることができるため、該異径連結継手内に残留することがなく安全である。
【００３６】
次いで、ねじ孔７５から栓体８１を取外すと（図１２）、スリーブ８５は図１２に示す矢印方向に移動できるようになり、ソケット部１９に装着させたロックボール１９ａは自由となり、該異径連結継手４０を接続継手１０のソケット部１９から分離させることができる。もちろん、第２の開閉弁Ｂは閉弁しているのでホース９からＬＰガスが漏れることはない。
【００３７】
本発明に係る異径連結継手４０は、接続継手１０に接続したままの状態で液取入弁３ｈのプラグ部４ｈから離脱させた後、誤って接続継手１０のハンドル１２を操作して開閉弁Ｂを閉口して第７の開閉弁Ｘと第２の開閉弁Ｂとの間の距離Ｍ内にＬＰガスが残留し、該ＬＰガスが熱膨張により内圧が上昇しても、可動筒６５の挟径部６７ｂに設けた隙間Ｙを通過した内圧が、弁筒体１８をばねの弾発力に抗してスライドさせて開閉弁Ｂを押し開けるので液封状態を防止でき安全である。
【００３８】
本発明に係る異径連結継手４０をタンクローリに常備しておき、ホースの先端に設けた接続継手１０のソケット部の口径と、液取入弁のプラグ部の口径とが相違した場合、この異径連結継手４０を用いることによって容易に連結してＬＰガスを供給することができる。その上、該異径連結継手は従来のものに比べて長さを短く小型軽量化を図ったことにより、衝撃による破損を防止でき、且つ、内蔵した開閉弁を操作するハンドルを有しない構成にしたため操作性が一段と向上した。
【００３９】
なお、本実施の形態は、タンクローリーのホースの端部に装着したやや大径なソケット部１９を有した接続継手１０と、貯槽タンクに設けた小径な液取入弁３ｈとを連結する異径連結継手について説明した。しかし、タンクローリのホースの端部に装着した小径なソケット部１９ｈを有する接続継手１０ｈと、貯槽タンクに設けたやや大径な液取入弁３とを連結する場合にも使用することができる。もちろんその場合には、本実施の形態にかかる挿入筒４２は、接続継手１０ｈのソケット部１９ａと合致する口径のものを使用し、また、プラグ受部５２は、液取入弁３のプラグ部４と合致する口径のものを使用する。
【００４０】
【発明の効果】
本発明は、接続継手と異径連結継手とが接続された状態で、異径連結継手内に残留したＬＰガスの内圧が上昇したとき、高圧ガスは可動筒６５の隙間Ｙを通過して弁筒体１８をスライドさせて開閉弁Ｂを押し開けるので液封状態を防止でき安全である。また、接続継手と異径連結継手とを離脱させる場合、内筒本体に設けたガス抜孔を有したねじ孔に螺合させた栓体を弛めることにより、安全確実に大気中に放出させ、且つ、前記ねじ孔から栓体を離脱させた後でなければスリーブを操作することができないため、送液中に異径連結継手を離脱させる誤操作を防止できるので極めて安全である。さらに、異径連結継手を構成する部品数を少なくして全長を短く、小型軽量にしたことにより衝撃による破損や故障を防止することができ、取扱いが便利である。
【図面の簡単な説明】
【図１】大径なプラグ部を有する第１の液取入弁を装着した貯槽タンクに、同じく大径なソケット部を有する接続継手を連結させる状態の説明図である。
【図２】小径なプラグ部を有する第２の液取入弁を装着した貯槽タンクに、同じく小径なソケット部を有する接続継手を連結させる状態の説明図である。
【図３】従来の異径管継手の断面図である。
【図４】異径管継手のプラグ筒を大径な接続継手に連結させた状態の断面図である。
【図５】本発明に係る異径連結継手の断面図である。
【図６】本発明の異径連結継手と小径な第２の液取入弁と接続継手とを分離して配置させた状態を示す断面図である。
【図７】本発明の異径連結継手を接続継手に連結した状態の断面図である。
【図８】接続継手に連結した異径連結継手を、貯槽タンクに設けた小径な第２の液取入弁に連結させて閉弁状態を示した断面図である。
【図９】接続継手に連結した異径連結継手を、貯槽タンクに設けた小径な第２の液取入弁に連結させて開弁状態を示した断面図である。
【図１０】栓体を筒本体に設けたガス抜孔に螺合してポートを閉鎖すると共に、スリーブの移動を防止する状態を示した要部拡大断面図である。
【図１１】栓体を弛めてポートを開き、異径連結継手内に残留したＬＰガスの一部を気化して外部に排出させる状態を示す要部拡大断面図である。
【図１２】栓体をガス抜孔から取外して、異径連結継手内の残留ＬＰガスを排出させると共に、スリーブを移動できる状態にした要部拡大断面図である。
【符号の説明】
４０異径連結継手
４１筒本体
４２挿入筒
４２ｃ凹入溝
４２ｂボール溝
４３筒受部
５２プラグ受部
５５テーパー孔
５６ロックボール
５７通孔
５９内側筒
６２弁杆
６３弁部
６５可動筒
６５ｃ切欠孔
６７ｂ狭径部
７０小ばね
７１ばね
７５ねじ孔
７６ポート
７９ガス抜孔
８１栓体
８５スリ−ブ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fluid coupling, and more particularly to a different-diameter coupling joint that is attached to a connection joint provided on a hose of a tank lorry for delivering liquefied petroleum gas as required.
[0002]
[Prior art]
High-pressure fluid, particularly liquefied petroleum gas (hereinafter referred to as LP gas) is stored in storage tanks installed at predetermined locations, and LP gas is distributed to each storage tank by tank lorries regularly or irregularly. In order to supply LP gas from the tank lorry to the storage tank, a connecting joint attached to a hose connected to a tank (not shown) of the tank lorry is connected to the plug portion of the liquid intake valve provided in the storage tank. Yes. The diameter of the liquid intake valve provided in this storage tank and the diameter of the connection joint attached to the tip of the hose of the tank lorry may vary depending on the location where the storage tank is installed, the amount of storage in the tank, etc. .
[0003]
FIG. 1 shows a first opening / closing valve A built in a first liquid intake valve 3 constituting a multi-valve attached to the wall surface of a storage tank 1, a plug portion 4 containing a stop valve 4a, a tank lorry (FIG. (Not shown) is attached to one end of a connection joint 10 provided at the end of a hose 9 connected to the socket portion 19 and is detachably connected to a socket portion 19 having a diameter matching the plug portion 4, and LP gas is connected to the storage tank 1. Supply. Reference numeral 11 denotes a first handle for opening and closing the first on-off valve A built in the liquid intake valve 3, and 12 denotes a second handle for opening and closing a second on-off valve B built in the connection joint 10.
[0004]
As shown in FIG. 4, the connecting joint 10 has an operating shaft 13 supported on the same straight line at the base of the second handle 12, and an eccentric protrusion 14 provided on the operating shaft is inserted into the connecting joint in the front-rear direction. It is engaged with an engaging recess 15a provided on the outer surface of the movable cylinder 15 accommodated in a movable manner. Therefore, when the second handle 12 is rotated, the movable cylinder portion 15 moves back and forth in the axial direction, and the valve portion 17 pivotally attached to the tip of the valve rod 16 pivotally supported on the inner end portion of the movable cylinder portion is also provided. Move back and forth at the same time. Housed in the movable cylinder portion 15 and springed forward by a spring Is The tip of the valve cylinder 18 is in contact with the back surface of the peripheral surface portion of the valve portion 17 to seal it. A second on-off valve B formed by the valve portion 17 and the tip of the valve cylinder 18 is sealed.
[0005]
In FIG. 2, a multi-valve formed by incorporating a third on-off valve C in a second liquid intake valve 3 h having a plug portion 4 h having a smaller diameter than the plug portion 4 is attached to the wall surface of the storage tank 1. In the embodiment, a stop valve 4a is accommodated in the second liquid intake valve 3h. The plug portion 4h of the second liquid intake valve 3h and the socket portion 19h of the slightly small-diameter connecting joint 10h having the same diameter as the plug portion are detachably connected to each other to store the LP gas in the storage tank 1. Supplying. This connection joint 10h is connected to a slightly smaller diameter hose 9 connected to the tank lorry and incorporates a fourth on-off valve D. In the figure, 11h is a third handle for opening and closing the third on-off valve C, 12h is a movable cylinder portion accommodated in the connecting joint 10h so as to be movable back and forth, and a valve shaft pivotally supported in the movable cylinder portion. A handle that moves back and forth in the direction, usually in the closed position.
[0006]
As described above, the tank lorry for delivering LP gas includes, for example, plugs provided on the sockets 19 and 19h of the connection joints 10 and 10h provided at the end of the hose 9 and the liquid intake valves 3 and 3h on the tank 1 side. There is no problem when the diameters of the portions 4 and 4h match each other. However, if the socket 19 on the tank lorry side has a large diameter and the plug 4h provided on the liquid intake valve 3h on the tank 1 side has a small diameter, or vice versa, the diameter is different, so the hose is connected as it is. The LP gas could not be supplied to the storage tank 1 even if the LP gas was delivered by a tank lorry.
[0007]
Therefore, when the diameter of the socket part of the connection joint is different from the diameter of the plug part of the liquid intake valve, the connection is performed using the different diameter pipe joint 20 shown in FIGS. This different diameter pipe joint 20 is provided with a connecting plug 21 connected to the connecting joint 10 or 10h on one side (right end), and the liquid intake valve 3 or 3h provided on the storage tank 1 on the other side (left side). Connection sockets 30 for connection are provided, and the connection plugs 21 and the connection sockets 30 are connected to each other using a connection cylinder 37 and an adapter 38. The adapter 38 is provided with a blow valve 39 for releasing LP gas remaining in the different diameter pipe joint 20.
[0008]
For example, a large-diameter connecting plug 21 that constitutes one (right end) of the different diameter pipe joint 20 incorporates a valve portion 23 a that opens and closes a valve port 22 a provided at the tip of the plug cylinder 22. A plug is attached to the rear end of the plug cylinder 22 attached to the rear end of the plug cylinder 22 so as to be movable back and forth by the spring force of the spring. The adapter 38 is fixed to the other end of the plug rear section 24. It is.
[0009]
Reference numeral 25 denotes a sleeve which is elastically attached to the outside of the plug cylinder 22 so as to be able to move back and forth, and a lock ball 19a attached to the socket part 19 is fixed to a recess 22C formed on the outer periphery of the plug cylinder 22. Then, the connecting plug 21 of the different diameter pipe joint 20 is fixed to the connection joint 10. E is a fifth on-off valve that is configured by a valve port 22a and a valve portion 23a and that can be opened and closed.
[0010]
3 and 4, the connecting socket 30 constituting the other (left end) of the different diameter pipe joint 20 is a second liquid attached to the storage tank 1 in a movable cylinder 32 accommodated in the cylinder body 31 so as to be movable back and forth. A small-diameter receiving tube portion 35 connected to the plug portion 4h (FIG. 2) of the intake valve is provided. A rear body 36 for connecting the connecting cylinder 37 is fixed to the rear end (right end) of the movable cylinder 32.
[0011]
Further, inside the movable cylinder 32, a valve body 33a provided at the front end of a valve rod 33 pivotally supported at the rear end is spring-loaded to accommodate the front end (left end) of the inner cylinder 34 that is accommodated so as to be movable back and forth. ) So as to be openable and closable. The valve body 33a and the valve port 34a constitute a sixth opening / closing valve F, and a sixth handle 12i for operating opening / closing of the opening / closing valve F is integrally provided.
[0012]
When LP gas is supplied from the tank lorry to the storage tank 1 having a small-diameter liquid intake valve 3h using the different diameter pipe joint 20, the different diameter pipe joint 20 is connected to the connection joint 10 in advance at one end of the hose. Or connect when using. The handle 12 of the connection joint 10 is previously positioned in the valve opening direction, the on-off valves B and E are opened, and only the on-off valve F is closed.
As shown in FIG. 4, the connection socket 30 of the different diameter pipe joint 20 is connected to the plug portion 4h of the liquid intake valve 3h shown in FIG. Next, when the handle 12h is opened, the valve rod 33 slides to the left together with the movable cylinder 32. The movable cylinder 32 slid together with the valve rod 33 comes into contact with the tip of the plug portion 4 h and stops. Only the valve rod 33 moves forward and the stop valve 4 a is retracted to open the on-off valve F and the stop valve 4 a to communicate with each other. Then, LP gas is supplied to the storage tank 1.
[0013]
After the LP gas supply is completed, the handle 12i is operated to close the valve, and then the sleeve 5h is slid to unlock the plug portion 4h. Connecting socket 30 The The work is completed by detaching.
[0014]
After detaching the different diameter pipe joint 20 from the plug portion 4h of the liquid intake valve 3h, the handle 12 of the connection joint 10 is reversely rotated to close the second on-off valve B, and then the blow valve 39 is turned on. Open to release residual gas in the different diameter pipe joint to the atmosphere. Thereafter, the sleeve 25 of the connecting plug 21 is slid to be detached from the socket of the connection joint 10, and the different-diameter pipe joint 20 is stored in a predetermined place.
[0015]
[Problems to be solved by the invention]
However, this different-diameter pipe joint 20 has a connection plug 21 connected to the connection joint 10 provided in the hose 9 of the tank truck on one side, and the plug portion 4 of the liquid intake valve 3 attached to the storage tank 1. A connection socket 30 is provided on the other side, and the rear body 36 of the connection socket and the connection plug 21 are connected to each other by screwing in a straight line using a connection cylinder 37 and an adapter 38. Inevitably was constructed with long dimensions. In addition, the different diameter pipe fittings with the rear body made of metal such as aluminum, brass or steel, the connecting cylinder, and the adapter are long and heavy, and the different diameter pipe fittings are easily damaged by the dropped impact, which is inconvenient to handle. there were. Furthermore, forgetting to remove residual gas due to forgetting to operate the blow valve 39, or the handle 12i or the handle 12h constituting a part of the different diameter pipe fitting can be used as a hand or a cover of the storage box during the winding operation of the hose. There is a risk that the on-off valve may close due to contact and malfunction, which is very dangerous.
Also, in the state where LP gas remains in the distance L between the valve portion 23a located at one end (right end) of the different diameter pipe joint and the fifth opening / closing valve E consisting of the valve opening 22a of the plug cylinder, When LP gas is sequentially distributed to storage tanks installed in various places as the tank lorries travel, the internal pressure of LP gas remaining in the different diameter pipe joint 20 rises due to thermal expansion in hot weather such as in summer. For this reason, the LP gas remaining in the different diameter pipe joint may increase the internal pressure due to an increase in the atmospheric temperature and destroy the different diameter pipe joint.
[0016]
The present invention allows high-pressure fluid remaining in a different diameter pipe joint to be safely and reliably discharged into the atmosphere after the supply of the fluid is completed, preventing damage to the joint due to thermal expansion, and It aims to be compact and lightweight.
[ 0017 ]
[Means for Solving the Problems]
The invention of claim 1 is provided at one end. Provided Insertion tube 42 Is provided at one end of a cylinder body 41 having a sleeve 85 which is slidably mounted by elastically springing a spring 88 on the outer periphery, provided with a ball groove 42b on the intermediate outer periphery, and formed slightly longer in the axial direction on the inner surface of the tip. A recessed channel 42c is formed, and at the tip of the movable cylinder 65 accommodated in the insertion cylinder 42 so as to be able to move forward and backward, a flow path 67a comprising a groove with a notched opening or a hole provided in the radial direction is provided. In addition, a pinched portion 67 b is provided on the outer peripheral surface of the distal end of the movable cylinder 65, and a gap Y is formed between the inner peripheral surface of the distal end of the insertion cylinder 42 and the outer peripheral surface of the movable cylinder 65. On the outer periphery of the cylinder body 41 with the cylinder receiving part 43 formed at the other end Said A sleeve 85 is mounted, and a plug receiving portion 52 provided by attaching a lock ball 56 to a tapered hole 55 provided on the peripheral surface is attached to the tube receiving portion, and an inner side is formed in a through hole communicating with the plug receiving portion 52. The cylinder 59 is elastically accommodated by a spring 70 and is slidably accommodated. The cylinder 59 is accommodated in the insertion cylinder 42 of the cylinder main body 41 so as to be movable back and forth, and is elastically repelled by a spring 71. Said A notch hole 65c is provided in the inner end portion of the movable cylinder 65, and the valve portion 63 attached to the distal end of the valve rod 62 that is pivotally attached to the rear portion and penetrates the inner cylinder 59 and the distal end of the inner cylinder 59 are opened and closed. An opening / closing valve X is provided so as to contact the cylinder body 41, a port 76 communicating with the inside of the cylinder body 41 is provided at the lower end of the screw hole 75 provided in the radial direction in the cylinder body 41, and one end is provided at the lower portion of the screw hole 75. A gas vent hole 79 with the other end opened to the outside is formed, and a plug 81 is screwed into the screw hole 75.
The invention of claim 2 An insertion cylinder 42 provided at one end is provided at one end of a cylinder body 41 having a sleeve 85 which is slidably mounted by springing an outer periphery of a spring 88 to provide a ball groove on an intermediate outer periphery, and on the inner surface of the tip. An indentation groove 42c formed slightly longer in the axial direction is formed, and a tip of the movable cylinder 65 accommodated in the insertion cylinder 42 so as to be capable of moving forward and backward is formed by a groove having a notch opening or a hole provided in the radial direction. And a pinching portion 67b is provided on the outer peripheral surface of the distal end of the movable cylinder 65, and a gap Y is formed between the inner peripheral surface of the distal end of the insertion cylinder 42 and the outer peripheral surface of the movable cylinder 65. The sleeve 85 is mounted on the outer periphery of the tube body 41 having the tube receiving portion 43 formed at the other end, and a plug receiving portion provided by attaching a lock ball 56 to a taper hole 55 provided on the peripheral surface of the tube receiving portion. 52 is attached, inside the through hole communicating with the plug receiving portion 52 59 is elastically received by a spring 70 and is slidably accommodated, and is accommodated in the insertion cylinder 42 of the cylinder main body 41 so as to be movable forward and backward, and is notched in an inner end portion of the movable cylinder 65 which is elastically springed by a spring 71. 65c is provided, and the valve portion 63 attached to the tip of the valve rod 62 that is pivotally attached to the rear portion and penetrates the inner tube 59 and the tip of the inner tube 59 are brought into contact with each other so as to be openable and closable. Provided, and provided in the cylinder body 41 in the radial direction. The screw hole 75 is formed at its lower end with a port 76 communicating with a through hole provided inside the cylinder body 41, and a gas vent hole 79 communicating with the outside is provided on the lower side surface of the screw hole 75. A valve portion that opens and closes the port is formed at the lower end of the plug body 81 to be screwed into the plug body, and the plug body 81 projects from the screw hole 75 and is detachably screwed to be attached to the outer periphery of the cylinder body. A stopper function of the sleeve 85 is provided.
[0018]
The insertion cylinder is provided at one end of a cylinder main body having a sleeve that is slidably mounted by spring springing on the outer periphery, provided with a ball groove on the intermediate outer periphery, and formed slightly longer in the axial direction on the inner surface of the tip. A recessed groove is formed, and the opening of the movable cylinder accommodated in the insertion cylinder so as to be movable back and forth is provided in a groove with a notch or in a radial direction. The A flow path composed of a hole or the like is provided, and a narrowed portion is provided on the outer peripheral surface of the distal end of the movable cylinder, and a gap is formed between the inner peripheral surface of the distal end of the insertion cylinder and the outer peripheral surface of the movable cylinder.
[0019]
The screw hole provided in the cylinder main body forms a port communicating with a through hole provided inside the cylinder main body at a lower end, and a gas vent hole communicating with the outside is provided on a lower side surface of the screw hole. A sleeve that opens and closes the port is formed at the lower end of the plug body to be screwed to the sleeve, and the plug body projects from the screw hole and is detachably screwed to be attached to the outer periphery of the cylinder body The stopper function is provided.
[0020]
Accordingly, it is possible to prevent the coupling joint from being removed during the liquid feeding, and it is possible to easily and safely discharge the LP gas remaining in the coupling joint after the liquid feeding to the atmosphere.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
The embodiment of the present invention will be described with reference to the drawings. The different-diameter coupling joint 40 shown in FIG. 5 has an insertion cylinder 42 inserted into a socket portion 19 provided inside the distal end of the connection joint 10 shown in FIG. The tube receiving portion 43 is provided at the other end. A male screw portion 53 formed on the outer peripheral surface of the plug receiving portion 52 located in the tube receiving portion 43 is screwed into the female screw portion 46 provided on the inner wall surface of the tube receiving portion 43, and the inside of the plug receiving portion 52 is A small-diameter through hole 57 is provided at the center. A plurality of tapered holes 55 are provided through the peripheral surface of the plug receiving portion 52 at regular intervals, and a lock ball 56 having a dimension longer than the thickness of the plug receiving portion 52 is loosely fitted in the tapered hole.
[0022]
An inner cylinder 59 is slidably accommodated in the through hole 57, and a plurality of seal rings 60 are attached to the outer peripheral surface of the inner cylinder so that the through hole 57 and the inner cylinder 59 are hermetically sealed. The rear end of a valve rod 62 having a valve portion 63 seated so as to be openable and closable on the end surface 59a of the inner cylinder is attached to the inner end of a movable cylinder 65 slidably accommodated in the insertion cylinder 42. It is pivotally supported. A cutout hole 65 c is provided at the inner end of the movable cylinder 65, and a small spring 70 is elastically mounted between the movable cylinder 65 and the inner cylinder 59, and the end surface 59 a of the inner cylinder and the back surface of the valve portion 63 are provided. A seventh on-off valve X is provided.
[0023]
A movable cylinder 65 provided with a flange 66 in the middle of the outer periphery is accommodated in the cylinder main body 41 so as to be able to advance and retreat, and the flange 66 is hooked with a stepped portion 49 provided on the inner surface of the insertion cylinder 42. The spring 71 is elastically placed on the distal end side of the insertion tube. A seal ring 68 is attached to the outer periphery of the movable cylinder 65 so that the space between the insertion cylinder 42 is airtight. In addition, a flow path 67a made of a groove with a notched opening or a hole provided in the radial direction is provided at the tip of the movable cylinder 65, and the pinching diameter with the outer diameter slightly narrowed on the outer peripheral surface of the movable cylinder 65. A portion 67 b is provided, and a gap Y is formed between the inner peripheral surface of the distal end of the insertion tube 42 and the outer peripheral surface of the movable tube 65.
[0024]
A small-diameter port 76 is formed at the inner end of a screw hole 75 provided in the middle portion of the cylinder body 41 in a radial direction, and a gas vent hole 79 communicating with the outside of the valve body 41 is communicated with the lower portion of the screw hole 75. It is formed. A plug body 81 is removably attached to the screw hole 75, and a valve portion for closing the port 76 is provided at the lower end of the plug body. The plug body is screwed into the screw hole 75 to be described later. It has a stopper function.
[0025]
A sleeve 85 is slidably attached to the outer peripheral surface of the cylinder main body 41, and a latching flange 41 a provided on the intermediate outer peripheral surface of the cylinder main body and a latching step portion 86 provided on the intermediate inner peripheral surface of the sleeve 85. A spring 88 is ejected between the two. Reference numeral 89 denotes a stop ring that is hooked to the inner peripheral surface of one end of the sleeve 85, and latches the hook collar 41 a provided on the outer periphery of the cylinder body 41 to prevent the sleeve 85 from escaping from the cylinder body. are doing.
[0026]
Hereinafter, the operation of the embodiment according to the present invention will be described with reference to FIGS. 5 and 6. A small-diameter liquid intake valve 3h (see FIG. 2) and a connection joint 10 (see FIG. 2) using the different-diameter coupling joint 40 shown in FIG. 1), the plug body 81 is removed from the screw hole 75 provided in the cylinder body 41, and the sleeve body 85 is retracted in the direction of the arrow shown in FIG. The tube 42 is inserted into the socket part 19 of the connection joint 10.
[0027]
Lock ball 19a mounted on socket 19 Is It is pushed out in the radial direction by the insertion cylinder 42 that enters, and the distal end surface of the insertion cylinder abuts the valve portion 17 that is in contact with the distal end surface of the valve cylinder 18 of the connection joint 10. At the same time, the lock ball engages with the ball groove 42b provided on the outer peripheral surface of the insertion cylinder 42, and when the hand is released from the sleeve 85, the lock ball is fixed in the radial direction by the sleeve advanced by the elastic force of the spring 88. The connecting joint 10 having the socket part 19 is connected to the different-diameter connecting joint 40 having the insertion cylinder 42 (FIG. 7).
[0028]
As shown in FIGS. 5 and 7, when the plug body 81 is screwed into the screw hole 75 of the cylinder main body 41 to close the port 76, the plug body 81 protrudes from the outer peripheral surface of the cylinder main body 41 and is attached to one end of the sleeve 85. Therefore, the sleeve 85 is prevented from moving, and the coupling joint 40 is prevented from being detached from the connection joint 10 (FIG. 7).
[0029]
Next, the sleeve attached to the plug portion 4h of the liquid intake valve 3h shown in FIG. 5 The spring 6 Retreat against the plug part 4h Is inserted into the plug receiving portion 52 of the coupling joint 40, the lock ball 56 mounted on the peripheral surface of the plug receiving portion engages with the ball groove 4b provided on the outer peripheral surface of the plug portion 4h. Then spring 6 Sleeve advanced by the elasticity of 5 The lock ball 56 is pressed and fixed with Part 52 and the plug part 4h are connected (FIG. 8). In this case, plug part 4h The stop valve 4a built in is seated and closed by a spring at a valve opening provided at the tip of the plug portion.
[0030]
After connecting the small-diameter liquid intake valve 3h provided in the storage tank 1 and the large-diameter connection joint 10 connected to the tank lorry hose 9 as shown in FIG. When the handle 12 of the joint 10 is rotated, the operating shaft 13 on which the handle is pivoted rotates, and the movable cylinder portion 15 is advanced toward the socket portion 19 via the eccentric protrusion 14 provided on the operating shaft. . Next, when the valve portion 17 of the valve stem 16 moves forward and collides with the end surface of the movable cylinder, the movable cylinder 65 moves backward and the flow path 67a closes the second on-off valve B via the recessed groove 42c ( FIG. 9).
[0031]
When the movable cylinder 65 advances to the left, the valve portion 63 advances together with the movable cylinder, and the valve portion 63 But The seventh on-off valve X is opened away from the inner tube 59 that is in close contact. At the same time, the stop valve 4a seated on the valve port of the plug portion 4h of the liquid intake valve 3h is pressed by the valve portion 63 to open the valve port, and the liquid intake valve 3h and the connection joint 10 are opened. And communicate with each other via a different-diameter coupling joint 40. Therefore, when the handle 11h (FIG. 2) interlocked with the third on-off valve C built in the liquid intake valve 3h is operated to open the valve, the liquefied LP gas from the tank truck differs from the hose 9 and the connection joint 10. It can be supplied to the storage tank 1 through the diameter coupling joint 40 and the liquid intake valve 3h (FIG. 9).
[0032]
To disengage the different-diameter coupling joint 40 from the plug portion 4h of the second liquid intake valve, when the handle 12 of the connection joint 10 is first operated in the valve closing direction (rightward direction), the valve rod together with the movable cylinder portion 15 is operated. 16 moves in the same direction and the second opening / closing valve B is closed by the valve portion 17, and the movable cylinder 65 pressed by the valve portion 17 of the valve rod is moved by the elastic force of the spring 71. Then, the seventh on-off valve X is closed by the valve portion 63 of the valve rod 62 (rightward direction) (FIG. 8).
[0033]
Next, when the sleeve 5 attached to the plug part 4h is retracted against the spring toward the storage tank 1 side (left side), the lock ball 56 attached to the plug receiving part becomes free and the recessed part provided in the plug part 4h. The plug receiving portion 52 can be separated from the position 4b.
[0034]
The state of FIG. 7 is a state in which LP gas remains in the different diameter coupling joint 40, that is, in the distance M between the seventh on-off valve X and the second on-off valve B. When the tank lorry moves while the different diameter coupling joint 40 filled with LP gas is still connected to the connection joint 10 and the internal pressure of the LP gas rises due to an increase in the atmospheric temperature, the gas pressure is provided at the tip of the movable cylinder 65. The valve cylinder 18 of the connection joint 10 is pressed from the gap Y of the narrowed diameter portion 67b. The valve cylinder 18 pressed by the gas pressure can move backward against the spring force of the spring, open the on-off valve B, communicate with the hose side, and release the gas pressure.
[0035]
When the different-diameter coupling joint 40 and the connection joint 10 are separated, the port body 76 is rotated by loosening the plug body 81 screwed into the screw hole 75 provided in the cylinder body 41 in a direction perpendicular to the axial direction. When FIG. 11 is opened (FIG. 11), LP gas remaining in the different-diameter coupling joint 40 is vaporized by a pressure change from the small-diameter gas vent hole 79 communicating with the screw hole 75. Shi Therefore, it is safe without remaining in the joint with different diameters.
[0036]
Next, when the plug body 81 is removed from the screw hole 75 (FIG. 12), the sleeve 85 can move in the direction of the arrow shown in FIG. 12, and the lock ball 19a attached to the socket portion 19 becomes free and the different diameters are obtained. The coupling joint 40 can be separated from the socket portion 19 of the connection joint 10. Of course, since the second on-off valve B is closed, LP gas does not leak from the hose 9.
[0037]
The different-diameter coupling joint 40 according to the present invention is released from the plug portion 4h of the liquid intake valve 3h while being connected to the connection joint 10, and then erroneously operates the handle 12 of the connection joint 10 to open the on-off valve. Even if B is closed and LP gas remains in the distance M between the seventh on-off valve X and the second on-off valve B, and the internal pressure rises due to thermal expansion of the LP gas, Narrow diameter part 6 7 The internal pressure that has passed through the gap Y provided in b causes the valve cylinder 18 to slide against the spring force of the spring. The Since the on-off valve B is pushed open, a liquid-sealed state can be prevented and it is safe.
[0038]
If the diameter of the socket part of the connecting joint 10 provided at the tip of the hose is different from the diameter of the plug part of the liquid intake valve, the different diameter coupling joint 40 according to the present invention is always provided in the tank truck. By using the diameter coupling joint 40, LP gas can be supplied by being easily coupled. In addition, the different-diameter coupling joint is shorter and smaller and lighter than conventional ones, so that it can be prevented from being damaged by impact and does not have a handle for operating the built-in on-off valve. Therefore, the operability has been further improved.
[0039]
In the present embodiment, different diameters for connecting the connecting joint 10 having a slightly large-diameter socket portion 19 attached to the end of the tank lorry hose and the small-diameter liquid intake valve 3h provided in the storage tank. The connection joint has been described. However, it can also be used when connecting the connecting joint 10h having the small-diameter socket portion 19h attached to the end portion of the hose of the tank truck and the slightly large-diameter liquid intake valve 3 provided in the storage tank. Of course, in that case, the insertion cylinder 42 according to the present embodiment uses a diameter that matches the socket portion 19a of the connection joint 10h, and the plug receiving portion 52 is the plug portion of the liquid intake valve 3. Use a caliber that matches 4.
[0040]
【The invention's effect】
In the present invention, when the internal pressure of LP gas remaining in the different-diameter coupling joint rises with the connection joint and the different-diameter coupling joint being connected, the high-pressure gas passes through the gap Y of the movable cylinder 65 and the valve Since the cylinder 18 is slid to open the on-off valve B, a liquid-sealed state can be prevented and it is safe. Further, when the connecting joint and the different-diameter coupling joint are separated, by loosening the plug screwed into the screw hole having the gas vent hole provided in the inner cylinder main body, it is safely and securely released into the atmosphere, and Since the sleeve can be operated only after the plug body is detached from the screw hole, it is extremely safe since an erroneous operation of removing the different-diameter coupling joint during liquid feeding can be prevented. Furthermore, the number of parts constituting the different-diameter coupling joint is reduced, the overall length is shortened, and the size and weight are reduced, so that damage and failure due to impact can be prevented, and handling is convenient.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a state in which a connection joint having a socket portion having a large diameter is connected to a storage tank equipped with a first liquid intake valve having a plug portion having a large diameter.
FIG. 2 is an explanatory view showing a state where a connection joint having a socket portion having a small diameter is coupled to a storage tank equipped with a second liquid intake valve having a small diameter plug portion.
FIG. 3 is a cross-sectional view of a conventional different diameter pipe joint.
FIG. 4 is a cross-sectional view of a state in which a plug cylinder of a different diameter pipe joint is coupled to a large-diameter connection joint.
FIG. 5 is a cross-sectional view of a different diameter coupling joint according to the present invention.
FIG. 6 is a cross-sectional view showing a state in which the different-diameter coupling joint of the present invention, the small-diameter second liquid intake valve, and the connection joint are arranged separately.
FIG. 7 is a cross-sectional view of a state in which the different-diameter coupling joint of the present invention is coupled to a connection coupling.
FIG. 8 is a cross-sectional view showing a closed state in which a different-diameter coupling joint coupled to a connection coupling is coupled to a small-diameter second liquid intake valve provided in a storage tank.
FIG. 9 is a cross-sectional view showing a valve open state in which a different-diameter coupling joint coupled to a connection coupling is coupled to a second liquid intake valve having a small diameter provided in a storage tank.
FIG. 10 is an enlarged cross-sectional view of a main part showing a state in which a stopper is screwed into a gas vent provided in a cylinder body to close a port and prevent a sleeve from moving.
FIG. 11 is an enlarged cross-sectional view of a main part showing a state in which a plug is loosened to open a port, and a part of LP gas remaining in a different diameter coupling joint is vaporized and discharged to the outside.
FIG. 12 is an enlarged cross-sectional view of a main part in which the plug body is removed from the gas vent hole to discharge residual LP gas in the different-diameter coupling joint and the sleeve can be moved.
[Explanation of symbols]
40 Different diameter coupling joint
41 Tube body
42 Insertion tube
42c recessed groove
42b Ball groove
43 Tube receiver
52 Plug receiving part
55 Taper hole
56 Rock Ball
57 through hole
59 Inner tube
62 Valve
63 Valve
65 Movable cylinder
65c Notch hole
67b Narrow diameter part
70 small spring
71 Spring
75 Screw hole
76 ports
79 Degassing holes
81 plug
85 SLAVE

Claims

An insertion cylinder (42) provided at one end is provided at one end of a cylinder body (41) having a sleeve (85) which is slidably mounted by repelling a spring (88) on the outer periphery. A groove (42b) is provided, and a concave groove (42c) formed slightly longer in the axial direction is formed on the inner surface of the tip, and is formed at the tip of the movable cylinder (65) accommodated in the insertion cylinder (42) so as to be able to advance and retract. Is provided with a flow path (67a) made up of a groove with a notched opening or a hole provided in the radial direction, and a pinched portion (67b) on the outer peripheral surface of the distal end of the movable cylinder (65). Forming a gap (Y) between the inner peripheral surface of the tip of (42) and the outer peripheral surface of the movable cylinder (65) ;
Said sleeve (85) to the outer periphery of the cylindrical body forming a cylindrical receiving portion (43) to the other end (41) is mounted, the tubular receiving portion 43 locked into the tapered hole (55) provided on the peripheral surface a ball ( 56) is attached, and a plug receiving portion (52) is attached, and the inner cylinder (59) is elastically received by a spring (70) in a through hole communicating with the plug receiving portion (52) so as to be slidable. and, the tubular body (41) of the insertion tube (42) forward and backward rotatably accommodated by providing a notch hole at the inner end of the movable cylinder which is elastic spring (71) (65) (65c) and in At the same time, the valve portion (63) attached to the tip of the valve rod (62) having the rear portion attached to the shaft and penetrating the inner tube (59) is brought into contact with the tip of the inner tube (59) so as to be opened and closed. The opening / closing valve (X) is provided, and the lower end of the screw hole (75) provided in the radial direction in the cylinder main body (41) is provided inside the cylinder main body (41). A communicating port (76) is provided, and a gas vent hole (79) is formed in the lower portion of the screw hole (75) with one end communicating and the other end opened to the outside, and a plug body (79) is formed in the screw hole (75). 81), and a different-diameter coupling joint.

An insertion cylinder (42) provided at one end is provided at one end of a cylinder body (41) having a sleeve (85) which is slidably mounted by repelling a spring (88) on the outer periphery. In addition to providing a groove, a recess groove (42c) formed slightly longer in the axial direction on the inner surface of the tip is formed, and at the tip of the movable cylinder (65) accommodated in the insertion cylinder (42) so as to be movable forward and backward, A flow path (67a) comprising a groove with a notch in the opening or a hole provided in the radial direction is provided, and a pinched portion (67b) is provided on the outer peripheral surface of the distal end of the movable cylinder (65). ) Between the tip inner peripheral surface and the outer peripheral surface of the movable cylinder (65),
The sleeve (85) is mounted on the outer periphery of a cylinder body (41) having a cylinder receiving part (43) formed at the other end, and a lock ball (56) is inserted into a tapered hole (55) provided on the peripheral surface of the cylinder receiving part. ) Is attached, and the inner cylinder (59) is slidably received by a spring (70) in a through hole communicating with the plug receiver (52). A notch hole (65c) is provided in the inner end of the movable cylinder (65) which is accommodated in the insertion cylinder (42) of the cylinder main body (41) so as to be able to move forward and backward and is repelled by a spring (71). The valve portion (63) attached to the tip of the valve rod (62) having the rear portion pivotally attached and penetrating the inner tube (59) is brought into contact with the tip of the inner tube (59) so as to be opened and closed. off valve (X) is provided, the screw holes (75) provided radially tubular body (41) is inside of the tubular body (41) at the lower end A port (76) communicating with the through hole is formed, a gas vent hole (79) communicating with the outside is provided on the lower side surface of the screw hole (75), and a plug ( 81), a valve part for opening and closing the port (76) is formed at the lower end, the plug body (81) is protruded from the screw hole (75) and is detachably screwed to the cylinder body (41). ), And a sleeve (85) attached to the outer periphery of the outer diameter).