JPH10103580A - Electric welding type pipe joint - Google Patents

Electric welding type pipe joint

Info

Publication number
JPH10103580A
JPH10103580A JP8259385A JP25938596A JPH10103580A JP H10103580 A JPH10103580 A JP H10103580A JP 8259385 A JP8259385 A JP 8259385A JP 25938596 A JP25938596 A JP 25938596A JP H10103580 A JPH10103580 A JP H10103580A
Authority
JP
Japan
Prior art keywords
pipe
locating
buried
piping
joint
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.)
Pending
Application number
JP8259385A
Other languages
Japanese (ja)
Inventor
Nobuhiro Nishikata
伸広 西方
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP8259385A priority Critical patent/JPH10103580A/en
Publication of JPH10103580A publication Critical patent/JPH10103580A/en
Pending legal-status Critical Current

Links

Landscapes

  • Branch Pipes, Bends, And The Like (AREA)
  • Surface Heating Bodies (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent cutting or a locating wire or interruption of laying work during pipe laying so as to accurately predict the existence of piping after burying by providing a housing part communicated from one end of a joint main body to the other end for housing the locating wire. SOLUTION: Buried piping is connected by welding on the ground by using a standard length synthetic resin pipe and an electric welding type pipe joint 4 to be formed long and then used. For locating the buried pipe after drilling up, locating wires 7 are fixed around the piping at an interval of, for example 2m or lower by a tape 8 or the like. The locating wires 7 are housed in a groove 44 provided in a joint main body 41 to be prevented from being pulling out of the joint main body 41. Thus, the possibility of cutting the locating wires during pulling in of the buried pipe by a non-open-cut method, piping laying work is prevented from being interrupted, a microtunnel diameter is reduced to a minimum and the existence of buried piping is accurately predicted for drilling up after pipe burying.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、ガスや配水配管等
に用いられる熱可塑性樹脂管を電気融着接続するための
熱可塑性樹脂製管継手の内周面近傍に電熱線を巻回埋設
した電気融着式管継手に関し、特に非開削工法に用いる
のに適した電気融着式管継手に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoplastic resin pipe joint used for gas and water distribution pipes, etc., in which a heating wire is wound and buried near an inner peripheral surface of a thermoplastic resin pipe joint. The present invention relates to an electro-fusion type pipe joint, and more particularly to an electro-fusion type pipe joint suitable for use in a non-cutting method.

【0002】[0002]

【従来の技術】ガスや配水配管等が地中に埋設されてい
る現場において、この埋設配管が破損するなどした場合
には、埋設配管の修理、補修または交換をしなければな
らない。埋設配管の修理等の工事を行うときには、先ず
埋設配管を露出させるための地盤の掘り起こし工事が行
われるが、その掘り起こし工事を行う前には、通常、地
上から埋設配管の埋設位置の探知(ロケーティング)を
行って、埋設配管を傷付けないようにするために、掘り
起こし工事を行うべき箇所を予め特定するようにしてい
る。なお、ロケーティングを行う手段としては、例えば
地上から電磁波を発信してその電磁波を地中の配管に反
射させ、その反射波を地上にて検知してロケーティング
を行うレーダーロケーターが用いられている。
2. Description of the Related Art At a site where gas, water distribution pipes, etc. are buried underground, if the buried pipe is damaged, the buried pipe must be repaired, repaired or replaced. When performing work such as repairing buried pipes, excavation work is first performed on the ground to expose the buried pipes, but before the digging work is carried out, usually the location of the buried pipes is detected from the ground. In order to prevent the buried piping from being damaged, a location where excavation work is to be performed is specified in advance. As means for performing locating, for example, a radar locator that transmits electromagnetic waves from the ground, reflects the electromagnetic waves to underground pipes, detects the reflected waves on the ground, and performs locating is used. .

【0003】ところが、配管材質としては、近年、ポリ
エチレン等の合成樹脂にて構成されているものが多く採
用されきており、埋設配管がポリエチレン等の合成樹脂
にて構成されている場合、レーダーロケーターによる埋
設配管のロケーティング性能があまり良好でない。何故
なら、ポリエチレン等の合成樹脂は電磁波の反射があま
り良好でないからである。
[0003] However, in recent years, many materials made of synthetic resin such as polyethylene have been adopted as the material of the piping. When the buried piping is made of synthetic resin such as polyethylene, a radar locator is used. Locating performance of buried piping is not so good. This is because synthetic resins such as polyethylene do not reflect electromagnetic waves very well.

【0004】ここで図5に従来の埋設配管の地中埋設状
態を示す説明図を示し、図6に埋設した電気融着式管継
手の拡大図を示す。道路1の下に埋設された大口径のポ
リエチレン管すなわち本管2に電気融着式(以下、EF
という)サービスチー3を取り付けて分岐させ、EFソ
ケット4やEFエルボ5を介して小口径のポリエチレン
管すなわち供給管6を敷設する。これら本管2および供
給管6などの埋設配管のロケーティング性能を向上させ
るべく、埋設配管の周囲にロケーティングワイヤー7を
テープ8等で取り付け、ロケーティングワイヤー7に探
知器の送信器(図示せず)を接続して電流を流すことに
より、ロケーティングワイヤー7から発生する電磁波を
地上より受信器(図示せず)で探知して、ロケーティン
グワイヤー7すなわち埋設配管の位置・深度・方向を確
認する方法が採られている。また、掘り起こし工事の際
に、掘削機の爪が既設管に当たって既設管を損傷させな
い工夫として、ビニール、ナイロン等の耐久性を有する
材質で作られ、幅150mm以上でラミ入り、ダブル折りの
標識シート9を埋設配管の上に布設することが通例であ
る。
FIG. 5 is an explanatory view showing a state in which a conventional buried pipe is buried underground, and FIG. 6 is an enlarged view of a buried electrofusion type pipe joint. An electrofusion type (hereinafter referred to as EF) is attached to a large-diameter polyethylene pipe buried under the road
The service tee 3 is attached and branched, and a small-diameter polyethylene pipe, that is, a supply pipe 6 is laid via the EF socket 4 and the EF elbow 5. In order to improve the locating performance of the buried piping such as the main pipe 2 and the supply pipe 6, a locating wire 7 is attached around the buried pipe with a tape 8 or the like, and a transmitter of a detector (not shown) is attached to the locating wire 7. ) To detect the electromagnetic wave generated from the locating wire 7 by a receiver (not shown) from the ground and check the position, depth, and direction of the locating wire 7, that is, the buried piping. The method is adopted. In addition, during excavation work, as a device to prevent the excavator's claws from hitting the existing pipe and damaging the existing pipe, it is made of durable material such as vinyl, nylon, etc. It is customary to lay 9 on the buried piping.

【0005】[0005]

【発明が解決しようとする課題】ところが、従来のよう
に、ロケーティングワイヤーが取り付けられている合成
樹脂埋設配管にあっては、電気融着式管継手の本体は合
成樹脂管の外に突出した寸法に形成されており、さらに
ロケーティングワイヤーは、電気融着式管継手の本体の
外周より外側に取り付けることになる。さらに、近年は
掘削機械により、目的地まで小径のマイクロトンネルを
地中に形成した後、別途、地上で融着接続した埋設配管
を連続的に引き込んで、目的地まで埋設配管を布設する
非開削工法が行われている。その際、埋設配管を引き込
むと同時にロケーティングワイヤーも移動することにな
り、特に電気融着式管継手の箇所においては、電気融着
式管継手の外径が径方向に突出しているため、地中に岩
や瓦礫等があった場合に、それら障害物にロケーティン
グワイヤーが引っかかり、ロケーティングワイヤーが切
れてしまう問題がある。或いは、ロケーティングワイヤ
ーが継手本体とマイクロトンネルの壁との間に挟まる
と、無理な引っ張り荷重がロケーティングワイヤーに加
わりロケーティングワイヤーが切れる問題がある。
However, in a conventional synthetic resin buried pipe to which a locating wire is attached, the main body of the electrofusion type pipe joint protrudes out of the synthetic resin pipe. It is dimensioned and the locating wire is attached outside the outer periphery of the body of the electrofusion fitting. Furthermore, in recent years, excavation machines have been used to form a small-diameter micro-tunnel underground to the destination, and then separately draw in the buried pipe that has been fused and connected on the ground, and laid the buried pipe to the destination. Construction methods are being implemented. At that time, the locating wire also moves at the same time as the buried pipe is pulled in. Especially at the location of the electro-fusion type joint, the outer diameter of the electro-fusion type joint protrudes in the radial direction. When there are rocks, rubble, etc., there is a problem that the locating wire is caught by those obstacles and the locating wire is cut. Alternatively, when the locating wire is sandwiched between the joint body and the wall of the micro tunnel, there is a problem that an excessive tensile load is applied to the locating wire and the locating wire is cut.

【0006】本発明は上記のような問題に着目し、非開
削工法により配管を布設する場合でも、ロケーティング
ワイヤーが切断せず、配管布設作業を中断することなく
行うことができると共に、配管の埋設後、掘り起こし時
に埋設配管の存在を正確に予知するロケーティングが行
える電気融着式管継手を提供することを目的とする。
The present invention focuses on the above problems, and even when laying a pipe by a non-cutting method, the locating wire can be cut without cutting, and the pipe laying operation can be performed without interruption. An object of the present invention is to provide an electrofusion type pipe joint capable of performing locating for accurately predicting the presence of a buried pipe at the time of excavation after burial.

【0007】[0007]

【課題を解決するための手段】本発明は、熱可塑性樹脂
で形成された継手本体の内周部に通電加熱要素が埋め込
まれた電気融着式管継手において、前記継手本体の片端
部から他端部に連通し、ロケーティングワイヤーを収納
する収納部を設けた電気融着式管継手である。
SUMMARY OF THE INVENTION The present invention relates to an electrofusion type pipe joint in which an electric heating element is embedded in an inner peripheral portion of a joint body formed of a thermoplastic resin. This is an electrofusion type pipe joint provided with a storage portion that communicates with an end portion and stores a locating wire.

【0008】[0008]

【作用】本発明の電気融着継手では、ロケーティングワ
イヤーが、継手本体の外面よりも突出しないように収納
部に収納される。したがって、マイクロトンネルを形成
した後に埋設配管を引き込む非開削工法により配管を布
設する場合に、ロケーティングワイヤーが岩などの障害
物に引っかかったり、継手本体とマイクロトンネルとの
間に挟まってロケーティングワイヤーに無理な引っ張り
荷重が加わることが無くなる。
In the electric fusion joint of the present invention, the locating wire is housed in the housing so as not to protrude from the outer surface of the joint body. Therefore, when laying pipes by the non-cutting method of drawing in buried pipes after forming a micro tunnel, the locating wires may be caught by obstacles such as rocks, or may be caught between the joint body and the micro tunnels. No excessive tensile load is applied to the shaft.

【0009】[0009]

【発明の実施の形態】以下、本発明の実施の形態を実施
例にもとづき図面を参照して説明する。図1は一実施例
を示し電気融着により合成樹脂管に接続されロケーティ
ングワイヤーが取り付けられた電気融着式管継手の一部
縦断面図であり、図2は図1のX−X矢視図である。
尚、図5及び図6と同一部分は同一の参照符号で示す。
本実施例では、布設しようとする埋設配管は熱可塑性樹
脂、例えばポリエチレン樹脂、ポリプロピレン樹脂、ポ
リ塩化ビニル樹脂、ポリブテン樹脂等からなる合成樹脂
管A,Bと、同じ熱可塑性樹脂からなる電気融着式管継
手4とから構成される。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on embodiments with reference to the drawings. FIG. 1 is a partial longitudinal sectional view showing an embodiment of an electrofusion type pipe joint to which a locating wire is attached by being connected to a synthetic resin pipe by electrofusion, and FIG. 2 is an arrow XX of FIG. FIG.
5 and 6 are denoted by the same reference numerals.
In the present embodiment, the buried pipe to be laid is a fusion pipe made of the same thermoplastic resin as synthetic resin pipes A and B made of a thermoplastic resin, for example, polyethylene resin, polypropylene resin, polyvinyl chloride resin, polybutene resin and the like. And a pipe joint 4.

【0010】ソケットタイプの電気融着式管継手4は、
継手本体41の内周面に電熱線42を螺旋状に埋設し、
その両端をコネクターピン43,43に接続したもので
ある。コネクターピン43,43は、通常継手本体から
突出しており、このコネクターピン43,43に外部の
コントローラーを介して通電し、電熱線42を加熱する
ことにより、電気融着式管継手4の受口部に挿入した合
成樹脂管A,Bを電気的に融着し接続するものである。
そして埋設配管は、5.5m程度の定尺の合成樹脂管と
電気融着式管継手4を複数個用いて連続的に地上で融着
接続し、最終的に数10〜数100mの長尺の配管にし
て利用するものである。その際、掘り起こし工事のとき
の埋設配管のロケーティングを行うために、埋設配管の
周囲におよそ2m以下の間隔でロケーティングワイヤー
7をテープ8等で固定する。ロケーティングワイヤー7
は、一般的に公称断面積2mm2程度の被覆銅線(より
線)を用い、ロケーティングワイヤー同士の接続は、圧
着スリーブ又は圧着コネクターを用いることが多い。ロ
ケーティングワイヤー7のビニール絶縁体の厚さは約
0.8mmで、ロケーティングワイヤー7の仕上がり外径
は約3.4mm程度であり、電気融着式管継手4には、こ
のロケーティングワイヤー7が入る寸法で、継手本体4
1の片端部41aから他端部41bに連通して収納でき
る収納部として溝44を設ける。尚、本実施例では、溝
44が継手本体41の外周面近傍の下部に直線状に設け
られているが、溝44の位置は外周面近傍の下部に限ら
れるものではなく、また溝の形状も直線状に限られるも
のではない。
The socket-type electro-fusion type pipe joint 4 is
A heating wire 42 is helically embedded in the inner peripheral surface of the joint body 41,
Both ends are connected to connector pins 43, 43. The connector pins 43, 43 usually protrude from the joint body, and the connector pins 43, 43 are energized through an external controller to heat the heating wire 42, so that the socket of the electro-fusible pipe joint 4 is received. The synthetic resin tubes A and B inserted into the portions are electrically fused and connected.
The buried piping is continuously fused on the ground using a plurality of 5.5-meter synthetic resin pipes and a plurality of electrofusion-type pipe joints 4, and finally a long length of several tens to several hundreds of meters. It is used as a pipe. At that time, in order to locate the buried pipe at the time of excavation work, a locating wire 7 is fixed around the buried pipe at an interval of about 2 m or less with a tape 8 or the like. Locating wire 7
In general, a coated copper wire (stranded wire) having a nominal cross-sectional area of about 2 mm 2 is used, and a connection between locating wires is often performed using a crimp sleeve or a crimp connector. The thickness of the vinyl insulator of the locating wire 7 is about 0.8 mm, and the finished outer diameter of the locating wire 7 is about 3.4 mm. The fitting body 4
A groove 44 is provided as a storage part that can be stored by communicating from one end 41a to the other end 41b. In the present embodiment, the groove 44 is provided linearly in the lower part near the outer peripheral surface of the joint body 41, but the position of the groove 44 is not limited to the lower part near the outer peripheral surface, and the shape of the groove is not limited. Is not limited to a straight line.

【0011】何れにしても、ロケーティングワイヤー7
は、継手本体41に設けられた溝44に収納され、継手
本体から径方向に外に出ることはなくなる。実際、ロケ
ーティングワイヤーの切断を避けるために余裕を見てマ
イクロトンネルの径を大きくしていたが、この分マイク
ロトンネル径を小さくできるし、埋設配管の挿通が容易
で非開削工法に適したものとなる。
In any case, locating wire 7
Is stored in the groove 44 provided in the joint body 41, and does not come out of the joint body in the radial direction. Actually, the diameter of the microtunnel was enlarged to avoid cutting the locating wire, but the diameter of the microtunnel can be reduced by this amount, and the buried piping can be easily inserted, making it suitable for non-cutting method. Becomes

【0012】次に図3は他の実施例を示し電気融着によ
り合成樹脂管に接続されロケーティングワイヤーが取り
付けられた電気融着式管継手の一部縦断面図であり、図
4は図3のX−X矢視図である。尚、図1及び図2と同
一部分は同一の参照符号で示す。
Next, FIG. 3 is a partial longitudinal sectional view of another embodiment of an electrofusion type pipe joint to which a locating wire is attached by being connected to a synthetic resin pipe by electrofusion, and FIG. FIG. 3 is a view taken along the line XX of FIG. 1 and 2 are denoted by the same reference numerals.

【0013】電気融着式管継手4には、ロケーティング
ワイヤー7が入る寸法で、継手本体41の片端部41a
から他端部41bに連通して収納できる収納部として貫
通孔45を設ける。尚、本実施例では、貫通孔45が継
手本体41の外周面近傍の下部に設けられているが、貫
通孔45の位置は外周面近傍の下部に限られるものでは
ない。
One end 41a of the joint main body 41 has a size that allows the locating wire 7 to be inserted into the electrofusion type pipe joint 4.
A through hole 45 is provided as a storage portion that can be stored in communication with the other end portion 41b. In the present embodiment, the through hole 45 is provided at a lower portion near the outer peripheral surface of the joint body 41, but the position of the through hole 45 is not limited to the lower portion near the outer peripheral surface.

【0014】ロケーティングワイヤー7を継手本体41
の貫通孔45に通すことにより、継手本体から径方向に
外に出ることはなくなり、第一の実施例と同様に、マイ
クロトンネル径を小さくできるし、埋設配管の挿通が容
易であるという効果を有するものである。
The locating wire 7 is connected to the joint body 41.
By passing through the through hole 45, it is possible to prevent the joint from coming out in the radial direction from the joint body, and similarly to the first embodiment, it is possible to reduce the diameter of the micro-tunnel and to easily insert the buried pipe. Have

【0015】以上、本発明の実施例を図面により詳述し
てきたが、具体的な構成はこの実施例に限られるもので
はなく、本発明の要旨を逸脱しない範囲の設計変更等が
あっても本発明に含まれる。
Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. Included in the present invention.

【0016】[0016]

【発明の効果】以上の説明のごとく、本発明の電気融着
式管継手にあっては、継手本体の片端部から他端部にロ
ケーティングワイヤーを収納する収納部を設けることに
より、埋設配管の中で最も径方向に大径箇所である継手
部分において、ロケーティングワイヤーを継手本体の外
に出すことがなくなるため、非開削工法において埋設配
管を引き込むときにロケーティングワイヤーを切断させ
ることがなくなり、さらにマイクロトンネル径を最小に
することができ、配管布設作業を中断することなく行う
ことができると共に、延いては配管の埋設後、掘り起こ
し時に埋設配管の存在を正確に予知するロケーティング
を行うことができる。
As described above, in the electrofusion type pipe joint according to the present invention, a buried piping is provided by providing a housing for housing a locating wire from one end to the other end of the joint body. Since the locating wire does not come out of the joint body at the joint part which is the largest diameter in the radial direction among the parts, it is no longer necessary to cut the locating wire when pulling in the buried piping in the non-cutting method In addition, the diameter of the micro tunnel can be minimized, and the pipe laying work can be performed without interruption. In addition, after laying the pipe, locating to accurately predict the presence of the buried pipe at the time of excavation is performed. be able to.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明の一実施例を示す電気融着により合成
樹脂管に接続されロケーティングワイヤーが取り付けら
れた電気融着式管継手の一部縦断面図である。
FIG. 1 is a partial longitudinal sectional view of an electrofusion type pipe joint to which a locating wire is attached by being connected to a synthetic resin pipe by electrofusion showing an embodiment of the present invention.

【図2】 本発明の一実施例を示す図1のX−X矢視図
である。
FIG. 2 is a view taken along line XX of FIG. 1 showing one embodiment of the present invention.

【図3】 本発明の他の実施例を示す電気融着により合
成樹脂管に接続されロケーティングワイヤーが取り付け
られた電気融着式管継手の一部縦断面図である。
FIG. 3 is a partial longitudinal sectional view of an electrofusion type pipe joint to which a locating wire is attached by being connected to a synthetic resin pipe by electrofusion showing another embodiment of the present invention.

【図4】 本発明の他の実施例を示す図3のX−X矢視
図である。
FIG. 4 is a view on arrow XX of FIG. 3 showing another embodiment of the present invention.

【図5】 従来の埋設配管の地中埋設状態を示す説明図
である。
FIG. 5 is an explanatory view showing a state in which a conventional buried pipe is buried underground.

【図6】 従来の埋設した電気融着式管継手の拡大図で
ある。
FIG. 6 is an enlarged view of a conventional buried electrofusion type pipe joint.

【符号の説明】[Explanation of symbols]

1…道路, 2…本管 3…EFサービスチー, 4…EFソケット 41…継手本体, 41a…片端部 41b…他端部, 42…電熱線 43…コネクターピン, 44…溝 45…貫通孔, 5…EFエルボ, 6…供給管 7…ロケーティングワイヤー, 8…テープ 9…標識シート, A,B…合成樹脂管 DESCRIPTION OF SYMBOLS 1 ... Road, 2 ... Main pipe 3 ... EF service tee, 4 ... EF socket 41 ... Joint body, 41a ... One end 41b ... Other end, 42 ... Heating wire 43 ... Connector pin, 44 ... Groove 45 ... Through hole, 5 EF elbow, 6 Supply pipe 7 Locating wire, 8 Tape 9 Marking sheet, A, B ... Synthetic resin pipe

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 熱可塑性樹脂で形成された継手本体の内
周部に通電加熱要素が埋め込まれた電気融着式管継手に
おいて、 前記継手本体の片端部から他端部に連通し、ロケーティ
ングワイヤーを収納する収納部を設けたことを特徴とす
る電気融着式管継手。
1. An electrofusion type pipe joint in which an electric heating element is embedded in an inner peripheral portion of a joint body formed of a thermoplastic resin, wherein the joint body communicates from one end to the other end and is located. An electrofusion type pipe joint, wherein a storage portion for storing a wire is provided.
JP8259385A 1996-09-30 1996-09-30 Electric welding type pipe joint Pending JPH10103580A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8259385A JPH10103580A (en) 1996-09-30 1996-09-30 Electric welding type pipe joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8259385A JPH10103580A (en) 1996-09-30 1996-09-30 Electric welding type pipe joint

Publications (1)

Publication Number Publication Date
JPH10103580A true JPH10103580A (en) 1998-04-21

Family

ID=17333414

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8259385A Pending JPH10103580A (en) 1996-09-30 1996-09-30 Electric welding type pipe joint

Country Status (1)

Country Link
JP (1) JPH10103580A (en)

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