JP4540023B2 - How to remove and remove a branch pipe using a branch joint - Google Patents

How to remove and remove a branch pipe using a branch joint Download PDF

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Publication number
JP4540023B2
JP4540023B2 JP2000351140A JP2000351140A JP4540023B2 JP 4540023 B2 JP4540023 B2 JP 4540023B2 JP 2000351140 A JP2000351140 A JP 2000351140A JP 2000351140 A JP2000351140 A JP 2000351140A JP 4540023 B2 JP4540023 B2 JP 4540023B2
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Prior art keywords
branch
pipe
branch pipe
adapter
joint
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Expired - Fee Related
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JP2000351140A
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JP2002156086A (en
Inventor
信一 秋山
崇朗 吉井
茂 水谷
晃士 加藤
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Hitachi Metals Ltd
Tokyo Gas Co Ltd
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Hitachi Metals Ltd
Tokyo Gas Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/3444—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/55—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles sealing elements being incorporated into the joints, e.g. gaskets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、流体輸送中のプラスチック製元管に分岐用継手を接続して、元管を補修する際に元管の補修部を遮断しても流体輸送を継続するために分岐管路を設けて元管補修部のバイパス管路を取り出し、その後取り外す方法に関するものである。
【０００２】
【従来の技術】
従来から、金属製元管を対象とした金属製の分岐継手としては例えば特開平７−６３２９４号公報等種々のものがある。このものはボルトナットで機械的に元管に締結するものであり、プラスチック製元管に接続した場合は、元管が変形してシール性が低下し、ガス漏れ等の問題を起こす。
そこでプラスチック製元管の外周面に融着するための電熱線をサドルの内面に埋設したプラスチック製の電気融着式サドル継手も多数開示されている。このプラスチック製サドル継手の枝分岐管部にプラスチック管を接続する場合は、継手本体とプラスチック管が同じプラスチック製のため、互いにねじ締結や電気融着継手を用いた電気融着が行え、安全確実に接続できる。
しかしながら、例えばプラスチック製元管の損傷部を修理する場合など、元管を遮断してバイパス管を設置するため、一時的に金属管や金属製継手をプラスチック製継手本体の分岐管部に設けた管用雌ねじに、この金属管又は金属製継手の雄ねじを螺合して接続する場合がある。
【０００３】
【発明が解決しようとする課題】
上記のごとくプラスチック製継手本体の雌ねじに金属製の雄ねじを螺合した場合は、金属製雄ねじの強度がプラスチック製雌ねじに比べてはるかに大きいため、雄ねじの締付けトルクでプラスチック製雌ねじが損傷し、接続が行えなかったり、螺合接続部から漏れが発生したりして確実な接続施工が行えない問題がある。
そこでプラスチック製継手本体に設けた分岐配管とのねじ接続部に、雌ねじを刻設した金属製リングを本体に鋳包みして一体成形したり、又は雌ねじ付金属製リングをシールと抜止め廻り止め機構を介して継手本体に嵌着したものも見られる。
しかしながら金属管等の金属製雄ねじを螺合締結する締め付けトルクは非常に大きく、プラスチック製継手本体と雌ねじを刻設した金属製リングとの鋳包み又は嵌着結合が破壊して、嵌着部から漏れを起こしたり、不充分な締め付け状態でしか螺合接続できなかったりする問題がある。
本発明は上記の課題を解消して、プラスチック製元管に金属製の分岐管を分岐取り出し配管施工する場合でも、確実な接続が行えて分岐管施工が簡単容易に行える分岐用継手を用いた分岐管路の取り出しおよび取り外し方法を提供する。
【０００４】
【課題を解決するための手段】
本発明の要旨は、プラスチック製元管の側部に接続するサドル部とサドル部の上面から立設する分岐管部とからなるプラスチック製の継手本体と、該継手本体の分岐管部に回転自在に密封接続した筒状で配管との接続端部を有す金属製のアダプターとからなり、前記分岐管部の端部に、円筒内面と、外面におねじを設け、前記アダプターの筒状外面にパッキンを装着して前記分岐管部の円筒内面に密封装着し、筒状外面に係止した袋ナットを前記分岐管部のおねじに螺合して、前記継手本体と金属製アダプターとを密封接続し、前記アダプターの筒状外面に突出部を２箇所設け、該２箇所の突出部間に前記袋ナットを係止した分岐用継手を用い、前記分岐用継手を流体輸送中のプラスチック製元管に接続し、該元管路から分岐管路を設け、前記分岐管路の必要性が終了した際には、前記袋ナットを緩めて前記アダプターを取外し、その後、前記袋ナットに代えて、別の閉止キャップを取付けて閉止することを特徴とする分岐用継手を用いた分岐管路の取り出しおよび取り外し方法である。
上記において、さらに、前記分岐管部内面には管用雌ねじを設け、該管用雌ねじにねじプラグを螺合して２重に閉止する、または前記円筒内面に閉止栓を挿入して２重に閉止することができる。
上記において、前記２箇所の突起部は、Ｃ型止め輪で形成することができる。
上記において、前記継手本体は電気融着によって元管と接続されることを特徴とする分岐用継手を用いた分岐管路の取り出しおよび取り外し方法である。
【０００５】
【作用】
本発明は上記の構成であって、プラスチック製の継手本体に配管接続端部を有す金属製のアダプターが回転自在に密封接続されている。このため、金属製アダプターに設けた接続用雌ねじ又は雄ねじに、金属管や金属製継手の接続ねじが螺合接続され、分岐配管が行われる。
アダプターは金属製で、このアダプターの金属製ねじに管や管継手の金属製ねじが螺合接続されるから、このねじ接続部は同じ金属製の雄ねじと雌ねじとの螺合締結であり、漏れのない安全なかつ確実強固なねじ締結接続が行える。
またこのアダプターはプラスチック製の継手本体と回転自在に密封接続されているから、このアダプターに金属管や金属製継手を螺合接合する際に作業性がよく、また分岐配管後の取付け配置上も融通が利くので施工性が良い。
【０００６】
また継手本体とねじアダプターとの接続部は、ねじアダプターに係止した袋ナットをサドル本体の雄ねじに締結してあり、継手本体とねじアダプターとは組み立て及び分離が容易に可能である。このため分岐取り出し配管の用途が終了後に、例えばバイパス配管を撤去したあと、継手本体の分岐管部の取り外しが容易に行え、また袋ナットに代えてキャップを螺合して分岐管部を容易に閉止でき、また再取出しも容易で、配管施工性がよい。
またアダプターの筒状外面に突出部を２箇所設け、該２箇所の突出部間に袋ナットを係止したから、袋ナットを締めつけてアダプターを継手本体に確実に固定でき、また袋ナットを緩めることにより、アダプターが袋ナットに係止されているので袋ナットに伴ってアダプターも継手本体から離脱し、アダプターの継手本体からの取り外しも容易である。
また継手本体は電気融着によって元管と接続されることにより、確実に元管に融着される。
【０００７】
【発明の実施の形態】
以下図面を参照しながら本発明の実施例を詳細に説明する。図１乃至図４は本発明に用いられる分岐用継手であって、分岐サドル継手を示す。
図１において、サドル継手本体１０はポリエチレン等の熱可塑性樹脂製で、サドル部１１の内面に電熱線１２を埋設してあり、プラスチック製元管の外面に跨って元管の外面に融着する。サドル部１１の外面中央に分岐管部１３を突設してあり、分岐管部１３の内面は端部から順に円筒内面１４、管用雌ねじ１５を形成し、分岐管部１３の外面には雄ねじ１６を形成してある。
【０００８】
２０は鋼製のアダプターで、一端は分岐取出し管を接続するための管用雌ねじ２１を設け、他端はサドル継手本体１０と接続される筒部２２となっている。筒部２２の外周は先端から順に、管用雌ねじ１５の内径より小さい外径の案内筒部２３、分岐管部１３の円筒内面１４に装着される円筒外面２４、円筒外面２４に装着したゴムパッキン２５、円筒外面２４に係止溝を設けて嵌着したＣ型止め輪２６、Ｃ型止め輪２６に係止する樹脂製の袋ナット２７、袋ナット２７の顎２８の幅より幅広の位置で余裕を持った位置に係止溝を設けてＣ型止め輪２９を嵌着してある。更にＣ型止め輪２９の上部に袋ナット２７が挿通できる外周面３０を設けてある。
【０００９】
図２乃至図４はアダプター２０に袋ナット２７を係止する手順を示し、まず図２の様にアダプタ２０を用意し、先端からＣ型止め輪２９を装着して上奥まで移動させておく。
次いで図３の様に袋ナット２７を装着してアダプター２０の上奥まで移動させる。この状態でアダプター２０外面の環状溝にゴムパッキン２５を装着し、更にＣ型止め輪２６を嵌着する。Ｃ型止め輪２６の外径は袋ナット２７の顎２８に係止する外径である。
次いで図４のごとく袋ナット２７を下降してＣ型止め輪２９をアダプター２０の環状溝に嵌着する。
【００１０】
これでねじアダプター２０に袋ナット２７が係止されたので、このねじアダプター２０をサドル本体の分岐管部１３内面に装着し、袋ナット２７を分岐管外面の雄ねじ１６に螺合する。以上でサドル本体１０と金属製アダプター２０はパッキン２５によって密封接続される。また袋ナット２７を完全に締めて固定する迄は、アダプター２０はサドル本体１０に対して回転可能であり、アダプター２０の配管接続雌ねじ２１に金属製の分岐管を配管接続する際も施工性がよい。
【００１１】
尚、例えば金属製アダプター２０に接続する分岐管路の用途、例えばバイパス管の必要性が終了した際はバイパス管路を撤去する必要があるが、分岐管部１３に螺合している袋ナット２７を緩めると、袋ナットの顎２８がアダプターのＣ型止め輪２９に係止してアダプター２０が引き上げられ、共に分岐管部１３から外される。この後、サドル本体分岐管部１３内面に設けた管用雌ねじ１５に樹脂製のねじプラグを螺合して閉止でき、又は分岐管部１３内面に設けた円筒内面１４にパッキン付の閉止栓を挿入して閉止でき、更に分岐管部１３外面の雄ねじ１６に袋ナット２７に代えて別の閉止キャップを螺合して、分岐管部１３からの漏れがないように、２重に完全閉止される。
【００１２】
【発明の効果】
以上詳述した様に、本発明による分岐用継手を用いた分岐管路の取り出しおよび取り外し方法は、プラスチック製元管に金属製の分岐管を分岐取り出し配管する場合でも、金属製の分岐管と漏れのない、安全で確実強固な接続が行え、また分岐管の配管施工、及び分岐管を取り外した後の分岐管部の閉止施工も容易に確実に行えるものである。
【図面の簡単な説明】
【図１】 本発明の一実施例を示す分岐用サドル継手の断面図である。
【図２】 本発明の一実施例のねじアダプター２０を示す図である。
【図３】 本発明の一実施例のねじアダプター２０に、袋ナット２７，ゴムパッキン２５，Ｃ型止め輪２６を装着した状態を示す図である。
【図４】 図３の状態から袋ナット２７を下げてＣ型止め輪２９を装着した状態を示す図である。
【符号の説明】
１０ サドル本体 １１ サドル部
１２ 電熱線 １３ 分岐管部
１４ 円筒内面 １５ 管用雌ねじ
１６ 雄ねじ ２０ ねじアダプター
２１ 分岐管接続用雌ねじ ２２ 筒部
２３ 案内外面 ２４ 円筒外面
２５ ゴムパッキン ２６、２９ Ｃ型止め輪
２７ 袋ナット ２８ 袋ナットの顎部
３０ 袋ナット挿通外面[0001]
BACKGROUND OF THE INVENTION
The present invention, by connecting the branching joint plastic original tube in fluid transport, provided the branch pipe to be cut off the repairing portion of Motokan when repairing a Motokan to continue the fluid transport It is related with the method of taking out the bypass pipe line of a main pipe repair part, and removing after that .
[0002]
[Prior art]
Conventionally, there are various types of metal branch joints for metal main pipes, such as JP-A-7-63294. This is mechanically fastened to the main pipe with bolts and nuts, and when connected to a plastic main pipe, the main pipe is deformed and the sealing performance is lowered, causing problems such as gas leakage.
Therefore, a number of plastic electric fusion type saddle joints in which a heating wire for fusing to the outer peripheral surface of the plastic main pipe is embedded in the inner surface of the saddle are also disclosed. When connecting plastic pipes to the branch and branch pipes of this plastic saddle joint, the joint body and the plastic pipe are made of the same plastic, so they can be screwed together and electrically fused using electrical fusion joints, ensuring safety and reliability. Can be connected.
However, for example, when repairing damaged parts of a plastic main pipe, a metal pipe or a metal fitting is temporarily provided in the branch pipe section of the plastic fitting main body in order to block the main pipe and install a bypass pipe. In some cases, a male screw of the metal tube or metal joint is screwed into and connected to the female screw for the tube.
[0003]
[Problems to be solved by the invention]
When a metal male screw is screwed onto the female screw of the plastic joint body as described above, the strength of the metal male screw is much larger than that of the plastic female screw, so the plastic female screw is damaged by the tightening torque of the male screw. There is a problem in that the connection cannot be performed or a leak is generated from the threaded connection portion, so that reliable connection cannot be performed.
Therefore, a metal ring engraved with female threads is cast into the main body at the screw connection with the branch pipe provided on the plastic fitting body, or the metal ring with female threads is sealed and secured against rotation. Some are fitted to the joint body through a mechanism.
However, the tightening torque for screwing and fastening a metal male screw such as a metal pipe is very large, and the casting or fitting connection between the plastic joint body and the metal ring engraved with the female screw is broken, and the There is a problem that leakage occurs or the screw connection can be made only with insufficient tightening.
The present invention solves the above-described problems, and uses a branch joint that can make a reliable connection and easily and easily perform branch pipe construction even when a branch pipe made of metal is taken out from a plastic main pipe . A method for removing and removing a branch line is provided.
[0004]
[Means for Solving the Problems]
The gist of the present invention is that a plastic joint body comprising a saddle part connected to the side part of the plastic main pipe and a branch pipe part erected from the upper surface of the saddle part, and the branch pipe part of the joint body can be freely rotated. A cylindrical adapter hermetically connected to the pipe and having a connection end to the pipe. At the end of the branch pipe, a cylindrical inner surface and a screw on the outer surface are provided. A seal is attached to the cylindrical inner surface of the branch pipe part, and a cap nut locked to the cylindrical outer surface is screwed into the male thread of the branch pipe part to connect the joint body and the metal adapter. Sealed connection, provided with two protrusions on the cylindrical outer surface of the adapter, and using a branch joint in which the cap nut is locked between the two protrusions, the branch joint is made of plastic during fluid transportation Connect to the main pipe and provide a branch pipe from the main pipe. When the necessity of the branch pipe is finished, the cap nut is loosened and the adapter is removed, and then, instead of the cap nut, another shut cap is attached and closed. This is a method of taking out and removing a branch pipe line using the.
In the above, a pipe internal thread is further provided on the inner surface of the branch pipe section, and a screw plug is screwed onto the internal thread for the pipe so as to be double-closed, or a closure plug is inserted into the cylindrical internal surface to double-close the pipe. be able to.
In the above, the two protrusions can be formed by C-type retaining rings .
In the above, the branch main body is connected to the main pipe by electric fusion, and is a method for taking out and removing a branch pipe using a branch joint.
[0005]
[Action]
The present invention has the above-described configuration, and a metal adapter having a pipe connection end is rotatably and hermetically connected to a plastic joint body. For this reason, a connection pipe of a metal tube or a metal joint is screwed and connected to a female thread for connection or a male thread provided on the metal adapter, and branch piping is performed.
The adapter is made of metal, and the metal screw of the pipe or fitting is screwed and connected to the metal screw of this adapter, so this screw connection part is a screwed fastening of the same metal male screw and female screw, and leakage Safe and surely strong screw fastening connection without any problems.
In addition, this adapter is rotatably and hermetically connected to the plastic fitting body, so it is easy to work with when screwing and joining metal pipes and metal fittings to this adapter. Because it is flexible, workability is good.
[0006]
Moreover, the connection part of a coupling main body and a screw adapter has fastened the cap nut latched to the screw adapter to the male screw of a saddle main body, and a coupling main body and a screw adapter can be assembled and separated easily. For this reason, after the use of the branch extraction pipe is completed, for example, after the bypass pipe is removed, the branch pipe portion of the joint body can be easily removed, and the branch pipe portion can be easily screwed in place of the cap nut. It can be closed, and it is easy to take out again, and the piping workability is good.
In addition, since two protrusions are provided on the cylindrical outer surface of the adapter and the cap nut is locked between the two protrusions, the cap nut can be tightened to securely fix the adapter to the joint body, and the cap nut can be loosened. Accordingly, since the adapter is locked to the cap nut, the adapter is also detached from the joint body along with the cap nut, and the adapter can be easily detached from the joint body.
Further, the joint body is securely fused to the main pipe by being connected to the main pipe by electric fusion.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 show branch joints used in the present invention, which are branch saddle joints.
In FIG. 1, a saddle joint body 10 is made of a thermoplastic resin such as polyethylene, and a heating wire 12 is embedded in the inner surface of a saddle portion 11, and is fused to the outer surface of the main pipe across the outer surface of the plastic main pipe. . A branch pipe part 13 projects from the center of the outer surface of the saddle part 11, and the inner surface of the branch pipe part 13 is formed with a cylindrical inner face 14 and a female female screw 15 in order from the end, and a male screw 16 is formed on the outer surface of the branch pipe part 13. Is formed.
[0008]
Reference numeral 20 denotes a steel adapter, one end of which is provided with a female screw 21 for connecting a branch extraction pipe, and the other end is a cylindrical portion 22 connected to the saddle joint main body 10. The outer periphery of the cylindrical portion 22 is, in order from the tip, a guide cylindrical portion 23 having an outer diameter smaller than the inner diameter of the pipe internal thread 15, a cylindrical outer surface 24 attached to the cylindrical inner surface 14 of the branch pipe portion 13, and a rubber packing 25 attached to the cylindrical outer surface 24. A C-type retaining ring 26 fitted with a retaining groove on the cylindrical outer surface 24, a resin-made cap nut 27 to be locked to the C-type retaining ring 26, and a margin wider than the width of the jaw 28 of the cap nut 27 A C-shaped retaining ring 29 is fitted with a locking groove provided at a position having the. Further, an outer peripheral surface 30 through which the cap nut 27 can be inserted is provided on the upper part of the C-type retaining ring 29.
[0009]
2 to 4 show a procedure for locking the cap nut 27 to the adapter 20. First, the adapter 20 is prepared as shown in FIG. 2, and a C-type retaining ring 29 is attached from the tip and moved to the top and back. .
Next, the cap nut 27 is mounted as shown in FIG. In this state, the rubber packing 25 is attached to the annular groove on the outer surface of the adapter 20, and the C-type retaining ring 26 is further fitted. The outer diameter of the C-type retaining ring 26 is an outer diameter that engages with the jaw 28 of the cap nut 27.
Next, as shown in FIG. 4, the cap nut 27 is lowered and the C-type retaining ring 29 is fitted into the annular groove of the adapter 20.
[0010]
Now that the cap nut 27 is locked to the screw adapter 20, the screw adapter 20 is mounted on the inner surface of the branch pipe portion 13 of the saddle body, and the cap nut 27 is screwed onto the male screw 16 on the outer surface of the branch tube. Thus, the saddle body 10 and the metal adapter 20 are hermetically connected by the packing 25. Further, the adapter 20 can be rotated with respect to the saddle body 10 until the cap nut 27 is completely tightened and fixed, and the workability can be improved when a metal branch pipe is connected to the pipe connection female screw 21 of the adapter 20. Good.
[0011]
For example, the use of the branch pipe connected to the metal adapter 20, for example, when the necessity of the bypass pipe is finished, the bypass pipe needs to be removed, but the cap nut screwed into the branch pipe section 13 is used. When 27 is loosened, the cap nut jaw 28 is locked to the C-shaped retaining ring 29 of the adapter, the adapter 20 is pulled up, and both are removed from the branch pipe portion 13. Thereafter, a resin screw plug can be screwed onto the pipe internal thread 15 provided on the inner surface of the saddle main body branch pipe portion 13 and closed, or a sealing plug with packing is inserted into the cylindrical inner surface 14 provided on the inner surface of the branch pipe portion 13. In addition, another closed cap is screwed into the male thread 16 on the outer surface of the branch pipe portion 13 instead of the cap nut 27, and the double pipe is completely closed so that there is no leakage from the branch pipe portion 13. .
[0012]
【The invention's effect】
As described above in detail, the branch pipe removal and removal method using the branch joint according to the present invention is not limited to the metal branch pipe, even when the metal branch pipe is branched from the plastic main pipe. A leak-free, safe and secure connection can be made, and the piping construction of the branch pipe and the construction of closing the branch pipe portion after the branch pipe is removed can be easily and reliably performed.
[Brief description of the drawings]
FIG. 1 is a sectional view of a branch saddle joint showing an embodiment of the present invention.
FIG. 2 is a view showing a screw adapter 20 according to an embodiment of the present invention.
FIG. 3 is a view showing a state where a cap nut 27, a rubber packing 25, and a C-type retaining ring 26 are attached to the screw adapter 20 of one embodiment of the present invention.
4 is a view showing a state in which a cap nut 27 is lowered and a C-type retaining ring 29 is mounted from the state of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Saddle main body 11 Saddle part 12 Heating wire 13 Branch pipe part 14 Cylindrical inner surface 15 Female thread for pipe 16 Male thread 20 Screw adapter 21 Female thread for branch pipe connection 22 Cylindrical part 23 Guide outer surface 24 Cylindrical outer surface 25 Rubber packing 26, 29 C type retaining ring 27 Cap nut 28 Cap nut jaw 30 Cap nut insertion outer surface

Claims (5)

プラスチック製元管の側部に接続するサドル部とサドル部の上面から立設する分岐管部とからなるプラスチック製の継手本体と、該継手本体の分岐管部に回転自在に密封接続した筒状で配管との接続端部を有す金属製のアダプターとからなり、
前記分岐管部の端部に、円筒内面と、外面におねじを設け、前記アダプターの筒状外面にパッキンを装着して前記分岐管部の円筒内面に密封装着し、筒状外面に係止した袋ナットを前記分岐管部のおねじに螺合して、前記継手本体と金属製アダプターとを密封接続し、
前記アダプターの筒状外面に突出部を２箇所設け、該２箇所の突出部間に前記袋ナットを係止した分岐用継手を用い、
前記分岐用継手を流体輸送中のプラスチック製元管に接続し、該元管路から分岐管路を設け、
前記分岐管路の必要性が終了した際には、前記袋ナットを緩めて前記アダプターを取外し、
その後、前記袋ナットに代えて、別の閉止キャップを取付けて閉止することを特徴とする分岐用継手を用いた分岐管路の取り出しおよび取り外し方法。A plastic joint body consisting of a saddle part connected to the side of the plastic main pipe and a branch pipe part erected from the upper surface of the saddle part, and a cylindrical shape rotatably connected to the branch pipe part of the joint body It consists of a metal adapter that has a connection end to the pipe.
At the end of the branch pipe portion, a cylindrical inner surface and a screw are provided on the outer surface, a packing is attached to the cylindrical outer surface of the adapter, and the cylindrical inner surface of the branch pipe portion is hermetically sealed and locked to the cylindrical outer surface Screwing the cap nut into the male thread of the branch pipe portion, sealingly connecting the joint body and the metal adapter,
Provided with two protrusions on the cylindrical outer surface of the adapter, using a branch joint that locked the cap nut between the two protrusions,
Connecting the branch joint to a plastic main pipe in fluid transport, and providing a branch pipe from the main pipe;
When the need for the branch line is over, loosen the cap nut and remove the adapter,
Then, it replaces with the said cap nut and attaches another closing cap, and closes it, The branch pipe extraction and removal method using the branch joint characterized by the above-mentioned. 請求項１において、さらに前記分岐管部内面には管用雌ねじを設け、該管用雌ねじにねじプラグを螺合して２重に閉止することを特徴とする分岐用継手を用いた分岐管路の取り出しおよび取り外し方法。  2. A branch pipe using the branch joint according to claim 1, further comprising a pipe female screw provided on the inner surface of the branch pipe portion, and a screw plug is screwed onto the pipe female screw to be double-closed. And removal method. 請求項１において、さらに前記円筒内面に閉止栓を挿入して２重に閉止することを特徴とする分岐用継手を用いた分岐管路の取り出しおよび取り外し方法。  2. A method for taking out and removing a branch pipe using a branch joint according to claim 1, further comprising a double stop by inserting a stopper plug into the inner surface of the cylinder. 前記２箇所の突起部は、Ｃ型止め輪で形成されることを特徴とする請求項１乃至３のいずれかに記載の分岐用継手を用いた分岐管路の取り出しおよび取り外し方法。  The method of taking out and removing a branch pipe using the branch joint according to any one of claims 1 to 3, wherein the two protrusions are formed by C-type retaining rings. 前記継手本体は電気融着によって元管と接続されることを特徴とする請求項１乃至４のいずれかに記載の分岐用継手を用いた分岐管路の取り出しおよび取り外し方法。  The method of taking out and removing a branch pipe using the branch joint according to any one of claims 1 to 4, wherein the joint body is connected to the main pipe by electric fusion.
JP2000351140A 2000-11-17 2000-11-17 How to remove and remove a branch pipe using a branch joint Expired - Fee Related JP4540023B2 (en)

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JP4919152B2 (en) * 2006-11-09 2012-04-18 日立金属株式会社 Branch joint, snow-shrinking sprinkler piping unit and snow-breaking panel unit using this branch joint
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JP5150556B2 (en) * 2009-04-28 2013-02-20 積水化学工業株式会社 Ball valve
CN107806764B (en) * 2017-11-27 2024-03-29 惠州市拓普金属材料有限公司 Rotary opening sealing device for metallurgical smelting furnace

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Publication number Priority date Publication date Assignee Title
JPH0335392U (en) * 1989-08-17 1991-04-05
JPH10185063A (en) * 1996-11-08 1998-07-14 Kubota Corp Snap tap with saddle

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Publication number Priority date Publication date Assignee Title
JPH0510888U (en) * 1991-07-25 1993-02-12 日新製鋼株式会社 Tube for mechanical fitting

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Publication number Priority date Publication date Assignee Title
JPH0335392U (en) * 1989-08-17 1991-04-05
JPH10185063A (en) * 1996-11-08 1998-07-14 Kubota Corp Snap tap with saddle

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