JP2585292B2 - How to connect pipes - Google Patents
How to connect pipesInfo
- Publication number
- JP2585292B2 JP2585292B2 JP62229154A JP22915487A JP2585292B2 JP 2585292 B2 JP2585292 B2 JP 2585292B2 JP 62229154 A JP62229154 A JP 62229154A JP 22915487 A JP22915487 A JP 22915487A JP 2585292 B2 JP2585292 B2 JP 2585292B2
- Authority
- JP
- Japan
- Prior art keywords
- joint body
- synthetic resin
- carbon fiber
- peripheral surface
- pipes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
Description
【発明の詳細な説明】 技術分野 本発明は、流体を輸送するポリオレフイン系合成樹脂
製である管の接続方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for connecting a pipe made of a polyolefin-based synthetic resin for transporting a fluid.
背景技術 典型的な先行技術は、第4図に示されている。ポリオ
レフイン系などの合成樹脂製の管1,2の端面1a,2aは、予
め準備された平行な加熱面を有する工具を用いて加熱、
軟化され、これらの端面1a,2aが軟化し、さらには溶融
した状態で管1,2が軸線方向に相互の近接方向に加圧さ
れて、突合わせ接続が行われる。BACKGROUND ART A typical prior art is shown in FIG. End faces 1a, 2a of tubes 1, 2 made of synthetic resin such as polyolefin are heated using a tool having a parallel heating surface prepared in advance,
The ends 1a and 2a are softened, and the tubes 1 and 2 are pressed in the axial direction toward each other in the molten state, and the butt connection is performed.
このような第4図に示された突合わせ状態では、管1,
2の端面1a,2aを加熱するための加熱工具が必要であり、
現場における作業が繁雑になる。またこの管1,2の端面1
a,2aを加熱し、その後、管1,2を軸線方向に相互の近接
方向に加圧する作業においては、加熱温度、時間、圧力
などを正確に設定しなければならず、作業に熟練者を必
要とするという問題がある。In the butt condition shown in FIG.
A heating tool for heating the end faces 1a, 2a of 2 is required,
Work on site becomes complicated. In addition, the end face 1
In the work of heating the tubes a and 2a and then pressing the tubes 1 and 2 in the axial direction toward each other, it is necessary to set the heating temperature, time, pressure, etc. accurately. There is a problem of needing.
他の先行技術は、第5図に示されている差込み接続の
管継手である。合成樹脂製の管3,4の端部3a,4aは、合成
樹脂製のソケツト5の端部5a,5b内に嵌合されて差込ま
れ、接続が行われる。管3の端部3aの外周面と、ソケツ
ト5の端部5aの内周面とを加熱するために、第6図に示
される加熱工具6が用いられる。この加熱工具6の加熱
面7,8によつて、管3の端部3aの外周面とソケツト5の
端部5aの内周面とが、それぞれ加熱されて軟化、溶融さ
れる。もう1つの管4の端部4aとソケツト5の端部5bと
も、同様な接続作業が行われる。Another prior art is a bayonet fitting shown in FIG. The ends 3a and 4a of the synthetic resin tubes 3 and 4 are fitted and inserted into the ends 5a and 5b of the socket 5 made of a synthetic resin to perform connection. In order to heat the outer peripheral surface of the end 3a of the tube 3 and the inner peripheral surface of the end 5a of the socket 5, a heating tool 6 shown in FIG. 6 is used. By the heating surfaces 7 and 8 of the heating tool 6, the outer peripheral surface of the end 3a of the tube 3 and the inner peripheral surface of the end 5a of the socket 5 are heated and softened and melted, respectively. A similar connection operation is performed on the end 4a of the other tube 4 and the end 5b of the socket 5.
このような第5図に示された差込み接続管継手におい
て、第6図に示される工具6が必要であり、現場での作
業が繁雑になる。また、接続作業時における加熱温度、
時間および圧力などを正確に設定する必要があり、熟練
者を必要とするという問題がある。In such a plug-in connection fitting shown in FIG. 5, the tool 6 shown in FIG. 6 is required, and the work on site becomes complicated. Also, the heating temperature during the connection work,
It is necessary to set time and pressure accurately, and there is a problem that a skilled person is required.
さらに他の先行技術は、第7図に示されている。合成
樹脂製管9,10の端部は、合成樹脂製のソケツト11内に嵌
合される。ソケツト11内には、ニクロム線などのような
加熱線12がコイル状に埋設されている。管9,10をソケツ
ト11内に部分的に嵌合した状態で、加熱線12を電源に接
続して、ジユール熱を発生させることによつて管9,10お
よびソケツト11が軟化、溶融し、接続が行われる。Yet another prior art is shown in FIG. The ends of the synthetic resin tubes 9 and 10 are fitted into a socket 11 made of synthetic resin. In the socket 11, a heating wire 12, such as a nichrome wire, is embedded in a coil shape. With the tubes 9, 10 partially fitted in the socket 11, the heating wire 12 is connected to a power source to generate Joule heat, so that the tubes 9, 10 and the socket 11 are softened and melted. The connection is made.
このような第7図に示された先行技術では、接続完了
時において加熱線12が残存する。この加熱線12は、管9,
10およびソケツト11の材料である合成樹脂を酸化させて
変質させ、そのためシール性能を劣化させるとともに、
強度を低下する恐れがある。また、加熱線12はコイル状
であり、管軸方向にコイル素線が間隔を有しているの
で、溶融すべき部分を均一な温度分布で加熱することが
できず、さらに金属製コイルには、機械的強度を向上さ
せる性能は期待できず、確実にシール性能や機械的強度
を確保することが困難となる。In the prior art shown in FIG. 7, the heating wire 12 remains when the connection is completed. This heating wire 12 is
The synthetic resin that is the material of the socket 10 and the socket 11 is oxidized and deteriorated, thereby deteriorating the sealing performance,
The strength may be reduced. Further, since the heating wire 12 is coil-shaped, and the coil wires have intervals in the tube axis direction, the portion to be melted cannot be heated with a uniform temperature distribution. However, the performance of improving the mechanical strength cannot be expected, and it is difficult to ensure the sealing performance and the mechanical strength.
発明が解決すべき問題点 本発明の目的は、作業性が向上され熟練を必要とせ
ず、生産性が向上され、シール性能や機械的強度などの
信頼性が向上された管の接続方法を提供することであ
る。Problems to be Solved by the Invention An object of the present invention is to provide a pipe connecting method which has improved workability, does not require skill, has improved productivity, and has improved reliability such as sealing performance and mechanical strength. It is to be.
問題点を解決するための手段 本発明は、ポリオレフイン系合成樹脂から成る接続さ
れるべき一対の管と、 ポリオレフイン系合成樹脂から成る継手本体とを準備
し、 この継手本体の内部には、軸線方向全長にわたつてか
つ周方向全面にわたつて炭素繊維層が埋込まれており、 前記各管の端部を、継手本体の端部内に嵌合し、 継手本体の軸線方向両端部で露出している炭素繊維層
に、ほぼ周方向全周に、一対の端子部材をそれぞれ接触
し、 端子部材間に電源を接続して、端子部材を介して炭素
繊維層に均一な電流密度で電力を供給し、これによつて
管の端部の外周面および継手本体の端部の内周面の前記
合成樹脂が溶融し、 この合成樹脂の溶融後に固化して一体化することを特
徴とする管の接続方法である。Means for Solving the Problems The present invention provides a pair of pipes to be connected made of a polyolefin-based synthetic resin, and a joint body made of a polyolefin-based synthetic resin. A carbon fiber layer is embedded over the entire length and over the entire circumferential direction, and the ends of the pipes are fitted into the ends of the joint body, and are exposed at both ends in the axial direction of the joint body. A pair of terminal members are brought into contact with the carbon fiber layer substantially all around in the circumferential direction, a power source is connected between the terminal members, and power is supplied to the carbon fiber layer at a uniform current density through the terminal members. Accordingly, the synthetic resin on the outer peripheral surface at the end of the pipe and the inner peripheral surface at the end of the joint body is melted, and solidified and integrated after melting of the synthetic resin. Is the way.
また本発明は、継手本体は、加熱によつて半径方向に
収縮する残留歪みが予め付与されていることを特徴とす
る。Further, the present invention is characterized in that the joint main body is given in advance a residual strain that contracts in a radial direction by heating.
作 用 本発明に従えば、ポリオレフイン系合成樹脂製の管と
継手本体との相互の嵌合状態にある継手本体内に炭素繊
維が埋込まれており、この炭素繊維が電力によつて加熱
されるので、ポリオレフイン系合成樹脂製の管と継手本
体とが溶融し、これによつて対を成すポリオレフィン系
合成樹脂製の管と継手本体とが相互に気密に接続される
ことになる。したがつて作業性が向上され、前述の先行
技術に関連して述べたような加熱のための工具を必要と
せず、また作業に熟練を必要とせず、高品質で気密性が
向上されかつ、強度が向上された接続が可能になる。According to the present invention, carbon fibers are embedded in the joint body in a state where the polyolefin-based synthetic resin pipe and the joint body are fitted to each other, and the carbon fibers are heated by electric power. Therefore, the polyolefin-based synthetic resin tube and the joint body are melted, whereby the paired polyolefin-based synthetic resin tube and the joint body are air-tightly connected to each other. Therefore, the workability is improved, and without the need for tools for heating as described in connection with the prior art described above, and without the need for skill in the work, the airtightness is improved with high quality, and A connection with improved strength is possible.
実施例 第1図は本発明の一実施例の断面図である、管15,16
は、継手本体17によつて接続されて合成樹脂製管継手が
構成される。管15,16および継手本体17は、ポリエチレ
ン、ポリプロピレン、ポリブデンなどのポリオレフイン
系熱可塑性合成樹脂材料から成る。管15,16の端部15a,1
6aは、継手本体17の端部17a,17bにそれぞれ嵌合され
る。Embodiment FIG. 1 is a sectional view of an embodiment of the present invention.
Are connected by a joint body 17 to form a synthetic resin pipe joint. The pipes 15, 16 and the joint body 17 are made of a polyolefin-based thermoplastic synthetic resin material such as polyethylene, polypropylene, and polybutene. Ends 15a, 1 of tubes 15,16
6a is fitted to ends 17a and 17b of the joint body 17, respectively.
第2図は継手本体17の軸線に沿う断面図であり、第3
図は継手本体の軸直角断面図である。継手本体17内に
は、炭素繊維層18が形成される。この炭素繊維層18は、
継手本体17に埋込まれ、綿状の炭素繊維のみ、または炭
素繊維加工品が合成樹脂に分散された構成を有する。炭
素繊維加工品とは、綿状、布状、網状、チヨツプ状、フ
イラ状などの炭素加工品である。継手本体17は、加熱に
よつて半径方向内方に収縮する残留歪が予め付与されて
いる。FIG. 2 is a sectional view taken along the axis of the joint body 17, and FIG.
The figure is a sectional view perpendicular to the axis of the joint body. Inside the joint body 17, a carbon fiber layer 18 is formed. This carbon fiber layer 18
It is embedded in the joint body 17 and has a configuration in which only cotton-like carbon fibers or a processed carbon fiber product is dispersed in a synthetic resin. The processed carbon fiber product is a processed carbon fiber product such as cotton, cloth, net, chop, and filler. The joint main body 17 is given in advance a residual strain that contracts inward in the radial direction by heating.
第1図(1)に示すように管15,16の端部15a,16aを継
手本体17の端部17a,17bに嵌合した状態で、炭素繊維層1
8の端部を、環状の端子部材19,20を介して直流または交
流の電源21に接続する。これによつて炭素繊維層18が加
熱されてジユール熱を発生し、継手本体17および管15,1
6の端部15a,16aとその付近が加熱されて軟化して溶融さ
れる。これによつて管15,16の端部15a,16aと継手本体17
の端部17a,17bとが気密に接続される。こうして継手本
体17の端部17a,17bの各内周面と、その内周面にそれぞ
れ嵌合している各管15,16の端部15a,16aとの間には、軸
線方向全長にわたつて、かつ周方向全面にわたつて、ポ
リオレフイン系合成樹脂が炭素繊維に入り込んで溶融固
化して管継手が構成される。With the ends 15a, 16a of the tubes 15, 16 fitted to the ends 17a, 17b of the joint body 17, as shown in FIG.
8 is connected to a DC or AC power supply 21 via annular terminal members 19 and 20. As a result, the carbon fiber layer 18 is heated to generate Joule heat, and the joint body 17 and the pipes 15, 1
The end portions 15a and 16a of 6 and the vicinity thereof are heated and softened and melted. As a result, the ends 15a, 16a of the pipes 15, 16 and the joint body 17
And the ends 17a and 17b are airtightly connected. In this way, between the inner peripheral surfaces of the ends 17a and 17b of the joint body 17 and the ends 15a and 16a of the pipes 15 and 16 fitted to the inner peripheral surfaces, respectively, extend over the entire length in the axial direction. Then, over the entire circumferential direction, the polyolefin-based synthetic resin enters the carbon fiber and is melted and solidified to form a pipe joint.
継手本体17が加熱されることによつて、その内周面は
管15,16の端部15a,16aの外周面を半径内方に押し付ける
ように収縮し、これによつて管15,16の端部15a,16aと継
手本体17の端部17a,17bとの強固な接続が可能になり、
気密性および機械的強度の向上が図られる。この接続が
完了された状態は、第1図(2)に示されている。端子
部材19,20は、金属製あるいは、銅または銀のペースト
を塗布した物体等、炭素繊維層18との間の接触抵抗の低
いものであり、その形状は判割状であつてもよく、また
はC字状であつてもよく、管15,16を外囲し、また管15,
16から取外すことができるように構成されている。When the joint body 17 is heated, its inner peripheral surface contracts so as to press the outer peripheral surfaces of the ends 15a, 16a of the tubes 15, 16 inward in a radial direction. Strong connection between the ends 15a, 16a and the ends 17a, 17b of the joint body 17 becomes possible,
The airtightness and the mechanical strength are improved. The state in which the connection has been completed is shown in FIG. 1 (2). The terminal members 19 and 20 are made of metal or an object coated with a copper or silver paste or the like, and have a low contact resistance with the carbon fiber layer 18; Or it may be C-shaped, surrounding the tubes 15, 16 and also
It is configured so that it can be removed from 16.
このような実施例によれば、管15,16の端部15a,16aの
外周面と、継手本体17の端部17a,17bの内周面とは、同
一の合成樹脂材料が相互に融着することになるので、気
密性を向上し、また機械的強度の向上を図ることができ
る。According to such an embodiment, the same synthetic resin material is mutually fused between the outer peripheral surfaces of the ends 15a, 16a of the pipes 15, 16 and the inner peripheral surfaces of the ends 17a, 17b of the joint body 17. Therefore, the airtightness can be improved and the mechanical strength can be improved.
炭素繊維層18は、継手本体17の軸線方向全長にわた
り、周方向全周にわたつて形成されているので、継手本
体17の全面にわたり均一な温度分布で加熱を行うことが
できる。したがつて継手本体17と管15,16との軟化溶融
状態を均一として、接続の品質を向上することができ
る。しかし継手本体17の残留歪による収縮力を地ぎて本
体17の内周面に均一に発生することができる。このこと
によつてもまた、接続の品質を向上することができる。
さらにまた接続完了後においては、継手本体17内に炭素
繊維層18が残存したままとなり、この炭素繊維層18が継
手本体17および管15,16の端部15a,16aの強度を向上する
ことになる。特にこの炭素繊維層18は、継手本体17の内
周面から半径方向外方に間隔をあけて配置されているの
で、接続完了後における曲げ強度の向上を図ることがで
きる。Since the carbon fiber layer 18 is formed over the entire length of the joint body 17 in the axial direction and over the entire circumference thereof, it is possible to perform heating with a uniform temperature distribution over the entire surface of the joint body 17. Accordingly, the quality of the connection can be improved by making the softened and molten state of the joint body 17 and the pipes 15 and 16 uniform. However, the contraction force due to the residual strain of the joint body 17 is grounded, and can be uniformly generated on the inner peripheral surface of the body 17. This can also improve the quality of the connection.
Furthermore, after the connection is completed, the carbon fiber layer 18 remains in the joint main body 17, and this carbon fiber layer 18 improves the strength of the joint main body 17 and the ends 15a, 16a of the pipes 15, 16. Become. In particular, since the carbon fiber layer 18 is arranged at an interval radially outward from the inner peripheral surface of the joint main body 17, it is possible to improve the bending strength after the connection is completed.
炭素繊維層18をなす炭素繊維は、長期間の使用におい
ても継手本体17を構成するポリオレフイン系合成樹脂材
料の変質をもたらすことはなく、長期間にわたつて安定
に接続状態を維持することが可能となる。したがつて炭
素繊維層18に代えて、前述の先行技術に関連して述べな
ニクロム線などの加熱線を埋込んだ構成に比べて経年変
化が生じないという点で優れているとともに、コストが
低減されるという利点がある。The carbon fibers forming the carbon fiber layer 18 do not cause deterioration of the polyolefin-based synthetic resin material constituting the joint body 17 even when used for a long period of time, and can maintain a stable connection state for a long period of time Becomes Therefore, in comparison with the configuration in which a heating wire such as a nichrome wire described in connection with the above-described prior art is embedded in place of the carbon fiber layer 18, the configuration is superior in that it does not change over time, and the cost is low. There is an advantage that it is reduced.
ソケツト17に代えてエルボであつてもよく、チーであ
つてもよく、レジユーサ、サドルなどであつてもよく、
その他のポリオレフイン系合成樹脂製の管および継手本
体に関して本発明は、広範囲に実施することができる。In place of socket 17, an elbow may be used, a chi may be used, a regiucer, a saddle, etc.,
The present invention can be widely applied to other pipes and joint bodies made of polyolefin-based synthetic resin.
効 果 以上のように本発明によれば、作業性が向上され、特
別に工夫した構成を有する工具などを必要とせずまた、
作業の熟練者を必要とせずに気密性と機械的強度を向上
した接続を行うことができる。また対をなす合成樹脂製
管の相互の嵌合状態にある部分を均一な温度分布で加熱
を行うことができ、このことによつて気密性の向上と機
械的強度の向上を図ることができる。Effects As described above, according to the present invention, workability is improved, and a tool or the like having a specially devised configuration is not required.
A connection with improved airtightness and mechanical strength can be performed without requiring a skilled worker. In addition, it is possible to heat portions of the pair of synthetic resin tubes that are in a mutually fitted state with a uniform temperature distribution, thereby improving airtightness and mechanical strength. .
さらにまた導電性繊維は嵌合部分に埋込まれているの
で、接続されるべき対を成す合成樹脂製管などは合成樹
脂材料同志が軟化ないしは溶融して接続することになる
ので、このことによつてもまたシール性の向上と機械的
強度の向上を図ることが可能である。Furthermore, since the conductive fibers are embedded in the fitting portion, the synthetic resin tubes and the like that form a pair to be connected are connected by softening or melting the synthetic resin materials. This also makes it possible to improve the sealing performance and the mechanical strength.
さらにまた、経年変化を抑制することができ、長期間
にわたつてシール性能を維持するとともに、特に炭素繊
維による大きな強度を保つことが可能となることが重要
である。Furthermore, it is important that the aging can be suppressed, the sealing performance can be maintained for a long period of time, and particularly the large strength of the carbon fiber can be maintained.
特に本発明によれば、接続されるべき一対の管とそれ
らの端部が内部に挿入される継手本体とは、いずれもポ
リオレフイン系合成樹脂から成り、継手本体の端部の各
内周面と、その内周面にそれぞれ嵌合している各管の端
部の外周面との間に存在する炭素繊維に前記合成樹脂が
入り込んで溶融固化して一体化した炭素繊維層が形成さ
れ、したがつてこのような構成を有する管継手は、炭素
繊維層に電力を供給して接続作業が行われるので、前述
のように接続作業が容易であり、その作業に熟練者を必
要としない。In particular, according to the present invention, the pair of pipes to be connected and the joint body into which their ends are inserted are both made of polyolefin-based synthetic resin, and each inner peripheral surface at the end of the joint body. The synthetic resin entered the carbon fiber existing between the inner peripheral surface and the outer peripheral surface of the end of each tube fitted to the respective inner peripheral surface to form a carbon fiber layer integrated by melting and solidifying. However, in the pipe joint having such a configuration, since the connection operation is performed by supplying electric power to the carbon fiber layer, the connection operation is easy as described above, and an expert is not required for the operation.
また炭素繊維は、前述の第7図に関連して述べた金属
製コイルである加熱線12のように酸化せず、したがつて
ポリオレフイン系合成樹脂を酸化させて変質させること
はなく、したがつてシール性能を劣化させず、また強度
を低下させることはなく、むしろこの炭素繊維によつて
強度が高くなるという優れた効果が達成される。Further, the carbon fiber does not oxidize like the heating wire 12 which is the metal coil described in connection with FIG. 7 described above, and thus does not oxidize the polyolefin-based synthetic resin and deteriorates the quality. Thus, the carbon fiber does not deteriorate the sealing performance and does not lower the strength. Rather, the carbon fiber achieves an excellent effect of increasing the strength.
さらに本発明では、この炭素繊維層に電力が供給され
ることによつて、溶融すべき部分を均一な温度分布で加
熱することができるという優れた効果が達成され、この
ことは前述の第7図に関連して述べた金属製コイルであ
る加熱線12を用いる先行技術によつては到底達成するこ
とができない優れた効果であり、本発明ではシール性能
および機械的強度をこの先行技術に比べて充分に向上す
ることができるようになり、信頼性の向上が図られる。Further, according to the present invention, by supplying electric power to the carbon fiber layer, an excellent effect that a portion to be melted can be heated with a uniform temperature distribution is achieved. This is an excellent effect that cannot be attained by the prior art using the heating wire 12 which is a metal coil described in connection with the drawing, and in the present invention, the sealing performance and the mechanical strength are compared with this prior art. , And the reliability can be improved.
また本発明によれば、この炭素繊維に合成樹脂が入り
込んで溶融固化して一体化するので、前述の第7図に関
連して述べた先行技術における金属製コイルである加熱
線が合成樹脂と分離してシール性能および機械的強度が
低下してしまうというおそれは、本発明では全く存在し
ない。Further, according to the present invention, since the synthetic resin enters the carbon fiber and is melted and solidified to be integrated, the heating wire, which is a metal coil in the prior art described with reference to FIG. In the present invention, there is no danger that the sealing performance and the mechanical strength are reduced due to separation.
さらに本発明では、継手本体の端部の内周面と各管の
端部の外周面との間には、接着剤が介在されることはな
く、継手本体と管とが溶融固化して一体化する構成を有
するので、上述のようにシール性能と機械的強度の向上
を図ることができるとともに、そのような接着剤を必要
としないので、管および継手本体とは異なる種類の合成
樹脂である接着剤の層を介して接続されることはなく、
管と継手本体とはいずれもポリオレフイン系合成樹脂か
ら成り、したがつてシール性能と機械的強度とが上述の
ように向上されることになるのである。またこのような
接着剤を、本発明では用いないので、作業性が良好であ
るという効果もある。Further, in the present invention, no adhesive is interposed between the inner peripheral surface at the end of the joint body and the outer peripheral surface at the end of each pipe, and the joint body and the pipe are melted and solidified to form an integral body. As described above, the sealing performance and the mechanical strength can be improved as described above, and since such an adhesive is not required, the pipe and the joint body are different types of synthetic resin. Without being connected through a layer of adhesive,
Both the pipe and the joint body are made of a polyolefin-based synthetic resin, so that the sealing performance and the mechanical strength are improved as described above. Further, since such an adhesive is not used in the present invention, there is also an effect that workability is good.
本発明では、継手本体の軸線方向両端部で露出してい
る炭素繊維層に、一対の端子部材をそれぞれ接触し、こ
の端子部材は、炭素繊維層の端部にほぼ周方向全周に接
触するので、炭素繊維層に均一な電流密度で電力を供給
することができ、したがつて管の端部の外周面および継
手本体の端部の内周面が均一な温度分布で加熱溶融され
ることができ、これによつて気密性が確実に達成される
とともに、その強度が周方向全周にわたつて均一とな
り、信頼性が向上されることになる。In the present invention, the pair of terminal members are respectively in contact with the carbon fiber layers exposed at both ends in the axial direction of the joint main body, and the terminal members are in contact with the end portions of the carbon fiber layers substantially all around the circumferential direction. Therefore, electric power can be supplied to the carbon fiber layer at a uniform current density, so that the outer peripheral surface of the end of the pipe and the inner peripheral surface of the end of the joint body are heated and melted at a uniform temperature distribution. As a result, airtightness is reliably achieved, and the strength becomes uniform over the entire circumference in the circumferential direction, thereby improving reliability.
本発明によれば、炭素繊維層は継手本体の内部に埋込
まれており、したがつて継手本体17の内周面から半径方
向外方に間隔をあけて配置されていることになり、これ
によつて管と継手本体との接続完了後における曲げ強度
の向上を図ることができるという優れた効果もまた、達
成される。According to the present invention, the carbon fiber layers are embedded inside the joint body, and are therefore arranged radially outward from the inner peripheral surface of the joint body 17, Accordingly, an excellent effect that the bending strength after completion of the connection between the pipe and the joint main body can be achieved is also achieved.
第1図は本発明の一実施例の断面図、第2図は継手本体
17の断面図、第3図は継手本体17の軸直角断面図、第4
図は先行技術の突合わせ接続管継手の構造を示す断面
図、第5図は先行技術の差込み接続管継手の構造を示す
断面図、第6図は第5図の先行技術において用いられる
工具6の断面図、第7図は他の先行技術の断面図であ
る。 15,16……合成樹脂製管、17……継手本体、18……炭素
繊維層FIG. 1 is a sectional view of one embodiment of the present invention, and FIG. 2 is a joint body.
FIG. 3 is a sectional view of the joint body 17 at right angles to the axis, and FIG.
Fig. 5 is a cross-sectional view showing the structure of a butt connection pipe joint of the prior art, Fig. 5 is a cross-sectional view showing the structure of a bayonet connection pipe joint of the prior art, and Fig. 6 is a tool 6 used in the prior art of Fig. 5. 7 is a cross-sectional view of another prior art. 15, 16… synthetic resin tube, 17… fitting body, 18… carbon fiber layer
Claims (2)
れるべき一対の管と、 ポリオレフイン系合成樹脂から成る継手本体とを準備
し、 この継手本体の内部には、軸線方向全長にわたつてかつ
周方向全面にわたつて炭素繊維層が埋込まれており、 前記各管の端部を、継手本体の端部内に嵌合し、 継手本体の軸線方向両端部で露出している炭素繊維層
に、ほぼ周方向全周に、一対の端子部材をそれぞれ接触
し、 端子部材間に電源を接続して、端子部材を介して炭素繊
維層に均一な電流密度で電力を供給し、これによつて管
の端部の外周面および継手本体の端部の内周面の前記合
成樹脂が溶融し、 この合成樹脂の溶融後に固化して一体化することを特徴
とする管の接続方法。1. A pair of pipes made of a polyolefin-based synthetic resin to be connected and a joint body made of a polyolefin-based synthetic resin are prepared. Inside the joint body, the entire length in the axial direction and the circumferential direction are provided. A carbon fiber layer is embedded over the entire surface, and the ends of the pipes are fitted into the ends of the joint body, and are substantially exposed to the carbon fiber layers exposed at both ends in the axial direction of the joint body. A pair of terminal members are brought into contact with the entire circumference, respectively, a power source is connected between the terminal members, and power is supplied to the carbon fiber layer at a uniform current density through the terminal members. A method for connecting pipes, wherein the synthetic resin on an outer peripheral surface of an end and an inner peripheral surface of an end of a joint body is melted, and solidified and integrated after melting of the synthetic resin.
する残留歪みが予め付与されていることを特徴とする請
求項1記載の管の接続方法。2. The pipe connecting method according to claim 1, wherein the joint body is preliminarily provided with a residual strain that shrinks in a radial direction by heating.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62229154A JP2585292B2 (en) | 1987-09-11 | 1987-09-11 | How to connect pipes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62229154A JP2585292B2 (en) | 1987-09-11 | 1987-09-11 | How to connect pipes |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6474382A JPS6474382A (en) | 1989-03-20 |
JP2585292B2 true JP2585292B2 (en) | 1997-02-26 |
Family
ID=16887624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62229154A Expired - Fee Related JP2585292B2 (en) | 1987-09-11 | 1987-09-11 | How to connect pipes |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2585292B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2736805B2 (en) * | 1989-05-19 | 1998-04-02 | 日本鋼管継手株式会社 | Synthetic resin pipe fittings |
JP2736804B2 (en) * | 1989-05-19 | 1998-04-02 | 日本鋼管継手株式会社 | Manufacturing method of synthetic resin pipe joint |
CN108105507A (en) * | 2017-12-15 | 2018-06-01 | 武汉理工大学 | A kind of RTP tube hot-melt adhesive paste carbon fibre composite casing and its application process |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5236169A (en) * | 1975-09-17 | 1977-03-19 | Meisei Chemical Works Ltd | Method of joining polyethylene pipe for piping |
JPS62151689A (en) * | 1985-12-25 | 1987-07-06 | 日立金属株式会社 | Manufacture of pipe joint made of resin |
-
1987
- 1987-09-11 JP JP62229154A patent/JP2585292B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPS6474382A (en) | 1989-03-20 |
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