JP3088710B2 - Riser tube for gas meter connection - Google Patents
Riser tube for gas meter connectionInfo
- Publication number
- JP3088710B2 JP3088710B2 JP11000903A JP90399A JP3088710B2 JP 3088710 B2 JP3088710 B2 JP 3088710B2 JP 11000903 A JP11000903 A JP 11000903A JP 90399 A JP90399 A JP 90399A JP 3088710 B2 JP3088710 B2 JP 3088710B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- plastic
- steel pipe
- ground
- gas meter
- 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 - Lifetime
Links
Landscapes
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、地中に埋設された
プラスチック管から、地上のガスメータに接続するため
のガスメータ接続用ライザー管に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas meter connecting riser pipe for connecting a plastic pipe buried underground to a gas meter on the ground.
【０００２】[0002]
【従来の技術】従来、地中埋設プラスチック管と地上の
ガスメータとの接続は、地中の埋設プラスチック管に金
属管を接続して、この金属管を地上に立ち上げて地上の
ガスメータと接続していた。このための金属管として
は、本出願人が考案の実開平６ー２０９８７号公報で開
示されたプラスチック管と金属製蛇腹管を接続したもの
がある。このものは、継手の端部内面に金属製蛇腹管と
プラスチック管を装着し、この装着した両管の内面にわ
たって金属製ステイフナーを内挿し、この金属製ステイ
フナーを内周側から拡径して金属製蛇腹管とプラスチッ
ク管とを継手内周面に圧縮して接続固定したものであ
る。2. Description of the Related Art Conventionally, the connection between an underground plastic pipe and a gas meter on the ground is made by connecting a metal pipe to the underground plastic pipe, starting up the metal pipe on the ground, and connecting with the gas meter on the ground. I was As a metal tube for this purpose, there is a metal tube connected to a plastic tube and a metal bellows tube disclosed in Japanese Utility Model Laid-Open No. Hei 6-20987 devised by the present applicant. In this type, a metal bellows tube and a plastic tube are attached to the inner surface of the end of the joint, a metal stiffener is inserted over the inner surfaces of both attached tubes, and the diameter of the metal stiffener is increased from the inner peripheral side. A bellows tube made of plastic and a plastic tube are compressed and connected and fixed to the inner peripheral surface of the joint.
【０００３】[0003]
【発明が解決しようとする課題】地中から地上のガスメ
ータに接続する場合、金属管が土壌と接すると、土壌と
コンクリート間に生じるマクロセル腐蝕等、地中に接す
ることによる腐蝕の問題がある。このために金属管の表
面に樹脂皮膜を設けたり、絶縁継手を設けたりするなど
各種の防食対策を施さなければならず、又このために定
期的に保安検査を行って安全性を確認する必要があっ
た。When connecting a metal pipe from the ground to a ground-based gas meter, there is a problem of corrosion caused by contact with the ground, such as macrocell corrosion generated between the soil and concrete when the metal pipe comes into contact with the soil. For this purpose, various anticorrosion measures must be taken, such as providing a resin film on the surface of the metal tube or providing an insulating joint, and for this purpose, it is necessary to periodically conduct security inspections to confirm safety. was there.
【０００４】また本出願人の考案による上記金属製蛇腹
管を用いたものは、継手内周面に装着したプラスチック
管と金属製蛇腹管とを、その内面に装着したステイフナ
ーを拡径し、両者を継手内周面に圧縮固定したものであ
るが、金属製蛇腹管は薄肉の波山形状で、地上のガスメ
ータを固定支持する強度がないため、ガスメータは地上
の建物等に必ず固定して配管接続しなければならない制
約があった。本発明は上記の課題を解消して、腐蝕の問
題がなく、ガスメータを建物等に別途支持固定しなくと
も配管で支持固定でき、地中埋設プラスチック管から地
上のガスメータに確実に接続できるガスメータ接続用ラ
イザー管を提供する。Further, in the case of using the above-mentioned metal bellows tube invented by the present applicant, the diameter of a plastic tube and a metal bellows tube mounted on the inner peripheral surface of the joint and the diameter of a stiffener mounted on the inner surface thereof are increased. Is compressed and fixed to the inner peripheral surface of the joint, but the bellows tube made of metal has a thin corrugated shape and does not have the strength to fix and support the gas meter on the ground. There were restrictions that had to be done. The present invention solves the above-mentioned problems, has no problem of corrosion, can be supported and fixed by a pipe without separately supporting and fixing a gas meter to a building or the like, and a gas meter connection that can be reliably connected from a plastic pipe buried underground to a gas meter on the ground. A riser tube is provided.
【０００５】[0005]
【課題を解決するための手段】本発明の要旨は、地中の
埋設プラスチック配管に接続して地上に立ち上げられる
プラスチック管と、一端は該プラスチック管の地上端か
ら地中の埋設部に亘って内挿して前記プラスチック管と
接続し他端は地上のガスメータに連結する鋼管と、該鋼
管を内挿したプラスチック管の少なくとも地上に立ち上
げられた部分の外面および鋼管を内挿したプラスチック
管の地中部位置の外面とに装着して縮径しプラスチック
管と鋼管との間を密封固定する金属製の筒体と、よりな
ることを特徴とするガスメータ接続用ライザー管であ
る。SUMMARY OF THE INVENTION The gist of the present invention is to provide a plastic pipe which is connected to a buried underground plastic pipe and rises to the ground, and has one end extending from the ground end of the plastic pipe to the underground buried part. <br/> connected the other end to the plastic pipe by interpolation in Te is a steel pipe that connects the ground of the gas meter, steel
At least the outer surface of the part of the plastic pipe with the tube inserted above the ground and the plastic with the steel pipe inserted
Diameter plastic by mounting on the outer surface of the ground portion position of the tube
A riser pipe for gas meter connection, comprising: a metal tubular body for hermetically fixing between a pipe and a steel pipe .
【０００６】上記において鋼管は、プラスチック管に内
挿する部分を裸管状態で内挿してあり、前記筒体を縮径
する部分に対応する鋼管の外面に環状の凹凸溝を形成し
てプラスチック管の内面と圧接してあることを特徴とす
るガスメータ接続用ライザー管である。上記において、
前記プラスチック管が地上に立ち上がる部分の外面に耐
候性を有す保護管を覆ったことを特徴とするガスメータ
接続用ライザー管である。上記においてプラスチック管
は、呼び口径３０Ａのガス用ポリエチレン管で、前記鋼
管は外面に樹脂被覆した呼び口径２５Ａのガス用カラー
鋼管からなることを特徴とするガスメータ接続用ライザ
ー管である。前記筒体は銅又はステンレス等の金属製
で、プラスチック管が地上に立ち上がる部分全体を覆う
長さであっても良く、また地上部と埋設部で縮径する部
分の短い長さのものでも良い。この場合は筒体の外面か
ら保護管が被せられ、プラスチック管の立ち上げ部分が
外部環境と遮断される。[0006] the steel pipe in the above SL is Yes interpolating the interpolation portion naked tube state plastic tube, to form an annular concavo-convex groove on the outer surface of the steel pipe corresponding to a portion of reduced diameter of the cylindrical body of plastic A gas meter connection riser tube which is in pressure contact with the inner surface of the tube. In the above,
A gas meter connected riser pipe, wherein the pre-Symbol plastic tube covering the protective tube having a resistance to <br/> weather resistance to the outer surface of a portion that rises on the ground. The plastic pipe is a riser pipe for gas meter connection, characterized in that the plastic pipe is a polyethylene pipe for gas having a nominal diameter of 30A and the steel pipe is a colored steel pipe for gas having a nominal diameter of 25A coated with resin on the outer surface. The cylindrical body is made of metal such as copper or stainless steel, and may have a length covering the entire portion where the plastic tube rises on the ground, or may have a short length in which the diameter is reduced between the ground portion and the buried portion. . In this case, the protective tube is covered from the outer surface of the cylindrical body, and the rising portion of the plastic tube is shut off from the external environment.
【０００７】更に本発明は、地上のガスメータに接続す
る鋼管と地中の埋設プラスチック管に接続するプラスチ
ック管とからなり、該鋼管とプラスチック管とを連結し
たガスメータ接続用ライザー管において、前記鋼管の端
部外面に前記プラスチック管を射出成型で一体成型して
設け、該プラスチック管の上端は地中から地上に立ち上
げ配管され、鋼管の下端はプラスチック管内の地中埋設
位置に配管されることを特徴とするガスメータ接続用ラ
イザー管である。上記において、前記鋼管の端部外面に
接着剤層を設け、該接着剤層を介して前記プラスチック
管を射出成型で設けたガスメータ接続用ライザー管であ
る。また上記において前記鋼管は外面樹脂被覆した鋼管
を用い、端部外面の外面樹脂被覆層を剥がした裸管の外
面にホットメルト接着剤層を設けて前記プラスチック管
を射出成型で設けたガスメータ接続用ライザー管であ
る。更に上記プラスチック管の地上に立ち上がる外面
は、外気と遮断する保護カバーで覆ったガスメータ接続
用ライザー管である。更に上記において前記プラスチッ
ク管は、プラスチック管の元部埋設位置で略直角に曲げ
られているガスメータ接続用ライザー管で、地中から地
上への立ち上げ配管が容易に行える。Further, the present invention provides a gas meter connecting riser pipe comprising a steel pipe connected to a gas meter on the ground and a plastic pipe connected to a buried plastic pipe underground, wherein the steel pipe and the plastic pipe are connected. The plastic pipe is integrally formed on the outer surface of the end by injection molding, the upper end of the plastic pipe is set up from the ground to the ground, and the lower end of the steel pipe is set at the underground position in the plastic pipe. It is a riser pipe for connecting a gas meter. In the above, it is a riser pipe for gas meter connection in which an adhesive layer is provided on an outer surface of an end portion of the steel pipe, and the plastic pipe is provided by injection molding via the adhesive layer. Further, in the above, the steel pipe is a steel pipe coated with an outer surface resin, a hot melt adhesive layer is provided on the outer surface of the bare pipe from which the outer resin coating layer on the outer surface of the end is peeled off, and the plastic pipe is provided by injection molding for gas meter connection. Riser tube. Further, the outer surface of the plastic tube rising above the ground is a gas meter connection riser tube covered with a protective cover that blocks the outside air. Further, in the above description, the plastic pipe is a riser pipe for connecting a gas meter which is bent at a substantially right angle at a position where the plastic pipe is buried at the base thereof, and can easily be set up from the ground to the ground.
【０００８】[0008]
【作用】本発明は上記の構成であるから、プラスチック
管は地中の埋設プラスチック配管に接続して、地中から
地上に立ち上げられる。またガスメータと接続される鋼
管は前記プラスチック管の地上端から地中部に内挿し、
この内挿部のプラスチック管に外挿した金属製筒体を縮
径することでプラスチック管と外面樹脂被覆鋼管とは密
封固定したライザー管が得られる。更に本発明は、鋼管
の端部外面にプラスチック管が射出成型で一体成型して
設けられるので鋼管とプラスチック管とは密封一体化し
たライザー管が得られる。このため鋼管は地中の土壌に
接することなく、プラスチック管と密封接続して地上の
ガスメータと配管される。このため鋼管が土壌に接する
ことによる種々の腐蝕の問題が生じない。またプラスチ
ック管が地上に立ち上げ配管された部分は、筒体ないし
は保護カバーで覆うことが出来、金属製の筒体ないしは
樹脂製の保護カバーでプラスチック管の地上立ち上げ部
分が保護され外部環境と遮断される。鋼管は地中土壌と
接しないから電気的に絶縁され、マクロセル腐食等の電
気的腐食の問題が生じない。またプラスチック管立ち上
がり部分の傷付や紫外線からも保護される。Since the present invention has the above-described structure, the plastic pipe is connected to the buried plastic pipe underground and is set up from the ground to the ground. In addition, the steel pipe connected to the gas meter is inserted into the underground from the ground end of the plastic pipe,
By reducing the diameter of the metal cylindrical body extrapolated to the plastic tube of the insertion portion, a riser tube in which the plastic tube and the outer surface resin-coated steel tube are hermetically sealed is obtained. Furthermore, according to the present invention, a plastic pipe is integrally formed on the outer surface of the end of the steel pipe by injection molding, so that a riser pipe in which the steel pipe and the plastic pipe are hermetically integrated is obtained. For this reason, the steel pipe does not come into contact with the underground soil, but is hermetically connected to the plastic pipe and connected to the gas meter on the ground. For this reason, various corrosion problems due to the contact of the steel pipe with the soil do not occur. In addition, the part where the plastic pipe is set up on the ground and piped can be covered with a cylinder or a protective cover. Be cut off. Since the steel pipe does not contact the underground soil, it is electrically insulated, so that there is no problem of electric corrosion such as macrocell corrosion. It is also protected from damage to the rising part of the plastic tube and ultraviolet rays.
【０００９】またプラスチック管の地上に立上がる部分
を、耐候性を有す保護管で金属製筒体の外面から覆うこ
とが出来、この場合もプラスチック管は外部環境から保
護遮断され、プラスチック管立上げ部の傷付きや紫外線
劣化等から保護される。従って、従来の絶縁継手を設け
たり、地中埋設部の金属管を樹脂被覆するなどの防食処
理を行なう必要がなく、更に剛性を有す鋼管で地中から
地上に立ち上げられてガスメータと接続されるので、配
管によってガスメータを支持することができ、ガスメー
タを別途建物等に支持する必要がないので、ガスメータ
の設置場所に制約を受けずに配管できる。A portion of the plastic tube that rises above the ground can be covered with a weather-resistant protective tube from the outer surface of the metal cylinder. In this case, the plastic tube is protected and shielded from the external environment. It is protected from scratches on the raised portion and UV deterioration. Therefore, there is no need to provide conventional insulation joints or perform anticorrosion treatment such as coating the metal pipes buried underground with resin, and the steel pipes that have rigidity are started up from the ground and connected to the gas meter. Therefore, the gas meter can be supported by the piping, and there is no need to separately support the gas meter in a building or the like, so that the piping can be performed without restriction on the installation place of the gas meter.
【００１０】またプラスチック管が地上に立ち上がる部
分は鋼管を内挿しており、プラスチック管の地上端と地
中埋設位置の両方とで金属製保護管の縮径によってプラ
スチック管と鋼管との間が密封固定されている。更に鋼
管にプラスチック管を射出成型で一体化成型してあるの
で、プラスチック管の地上端から鋼管の埋設端に亘って
密封一体化している。この場合、地上の配管部が万一の
火災等に遭遇して地上に立ち上がるプラスチック管の縮
径部あるいはプラスチック管が消失したとしても、ガス
メータと接続する外面樹脂被覆鋼管がプラスチック管の
地中埋設部まで内挿して埋設地中部で密封しているの
で、埋設部の密封シール部或いはプラスチック管にまで
熱の影響が及ばなく、地中埋設位置でプラスチック管と
外面樹脂被覆鋼管のシールが確保されており火災時にお
いてもガス漏れが防止される。Further, a steel pipe is inserted in a portion where the plastic pipe rises above the ground, and the plastic pipe and the steel pipe are hermetically sealed by reducing the diameter of the metal protective pipe at both the ground end of the plastic pipe and the underground burying position. Fixed. Further, since the plastic pipe is integrally formed with the steel pipe by injection molding, the plastic pipe is hermetically integrated from the ground end to the buried end of the steel pipe. In this case, even if the pipe on the ground encounters a fire or the like and the reduced diameter part of the plastic pipe that rises on the ground or the plastic pipe disappears, the outer resin-coated steel pipe connected to the gas meter is buried under the plastic pipe. Part is buried and sealed in the buried ground, so that the heat does not affect the sealed seal part of the buried part or the plastic pipe, and the seal between the plastic pipe and the outer resin-coated steel pipe is secured at the buried position. Gas leakage is prevented even in the event of a fire.
【００１１】 鋼管のプラスチック管が縮径される部分
の外面、又は鋼管の外面にプラスチック管が射出成型さ
れる部分の外面に環状凹凸溝を設けることが出来、プラ
スチック管内面とのシール性及び接続密着強度が向上す
る。また接着剤層を設けてプラスチック管を鋼管外面に
一体射出成型することでも接着強度が向上し、鋼管とプ
ラスチック管は確実にシールされ密封一体化される。更
にプラスチック管を呼び口径３０Ａのガス用ポリエチレ
ン管で、鋼管を呼び口径２５Ａのガス用カラー鋼管で設
けることにより、プラスチック管の内面に鋼管が内外面
の寸法マッチして内挿することができ、組立が容易に行
える。またプラスチック管の元部埋設位置で略直角に曲
げておくことで、地中から地上への立ち上げ配管が容易
に行える。An annular concave and convex groove can be provided on the outer surface of the portion of the steel pipe where the plastic pipe is reduced in diameter, or on the outer surface of the portion where the plastic pipe is injection-molded on the outer surface of the steel pipe, so that the sealability and connection with the inner surface of the plastic pipe can be provided. The adhesion strength is improved. Also, by providing an adhesive layer and integrally injection-molding the plastic pipe on the outer surface of the steel pipe, the adhesive strength is improved, and the steel pipe and the plastic pipe are securely sealed and integrally integrated. Further, by providing the plastic pipe with a polyethylene pipe for gas with a nominal diameter of 30A and the steel pipe with a color steel pipe for gas with a nominal diameter of 25A, the steel pipe can be inserted into the inner surface of the plastic pipe by matching the dimensions of the inner and outer surfaces, Easy assembly. In addition, by bending the plastic pipe at a substantially right angle at the base burying position, the rising pipe from the ground to the ground can be easily performed.
【００１２】[0012]
【発明の実施形態】以下本発明の実施例を図面に基づい
て説明する。図１は本発明の一実施例のガスメータ接続
用ライザー管１０を地上のガスメータ８に配管した状態
を示し、図２は本発明の一実施例を示すガスメータ接続
用ライザー管１０の半断面図である。ライザー管１０
は、大略下部のプラスチック管３０と上部の外面樹脂被
覆鋼管４０と金属製筒体２０とからなり、一体に接続固
定されたものである。下部のプラスチック管３０は地中
の埋設プラスチック管５とプラスチック継手６で接続さ
れて地上に立ち上げられる。継手６を用いる代わりにプ
ラスチック管３０を地中埋設位置で略直角方向に曲げて
おき、水平方向の埋設プラスチック管５と地上に立上が
るプラスチック管３０を１本のプラスチック管３０で形
成することもできる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a gas meter connecting riser pipe 10 of one embodiment of the present invention connected to a gas meter 8 on the ground, and FIG. 2 is a half sectional view of the gas meter connecting riser pipe 10 showing one embodiment of the present invention. is there. Riser tube 10
Is generally composed of a lower plastic pipe 30, an upper outer resin-coated steel pipe 40, and a metal cylindrical body 20, which are integrally connected and fixed. The lower plastic pipe 30 is connected to the buried plastic pipe 5 underground by a plastic joint 6 and is set up on the ground. Instead of using the joint 6, the plastic pipe 30 may be bent in a substantially right angle direction at the underground burying position, and the horizontal buried plastic pipe 5 and the plastic pipe 30 rising on the ground may be formed by one plastic pipe 30. it can.
【００１３】上部の外面樹脂被覆鋼管４０は地中から地
上に立ち上がるプラスチック管３０に内挿しており、外
面に塩化ビニル製の樹脂皮膜４１を被せてある。上端は
コック１、ガスメータ接続用継手２を介してガスメータ
８の入口側に接続される。ガスメータ８の出口側は同じ
く外面樹脂被覆鋼管４０、プラスチック管３０を介して
埋設配管され、建物内の各供給器具等に配管される。プ
ラスチック管３０に内挿する部分は樹脂被膜４１を剥し
て挿入してあり、縮径部２２、２３の外面に環状凹凸溝
４２、４３を設けてある。The upper outer resin-coated steel pipe 40 is inserted into a plastic pipe 30 that rises from the ground to the ground, and a resin film 41 made of vinyl chloride is covered on the outer surface. The upper end is connected to the inlet side of the gas meter 8 via the cock 1 and the joint 2 for connecting the gas meter. The outlet side of the gas meter 8 is also buried and piped through the outer resin-coated steel pipe 40 and the plastic pipe 30, and is connected to each supply device in the building. The portion to be inserted into the plastic tube 30 is inserted by peeling off the resin coating 41, and annular concave and convex grooves 42, 43 are provided on the outer surfaces of the reduced diameter portions 22, 23.
【００１４】金属製筒体２０は、プラスチック管３０の
少なくとも地上に立上がる部分を覆い、外面樹脂被覆鋼
管４０がプラスチック管３０に内挿した部分の長さに亘
って、即ちプラスチック管３０の地上立ち上がり部分
と、プラスチック管３０に内挿した外面樹脂被覆鋼管４
０の下端位置に亘って、ステンレス製の筒体２０がプラ
スチック管３０を覆っている。従ってプラスチック管３
０の地上立ち上げ部分は、直射日光等外部環境に露出し
ないように遮断されている。The metal tube 20 covers at least a portion of the plastic tube 30 that rises above the ground, and extends over the length of the portion where the outer resin-coated steel tube 40 is inserted into the plastic tube 30, that is, over the plastic tube 30. The rising portion and the outer resin-coated steel pipe 4 inserted in the plastic pipe 30
The stainless steel cylindrical body 20 covers the plastic tube 30 over the lower end position of the zero. Therefore plastic tube 3
The ground start-up portion of the No. 0 is blocked so as not to be exposed to the external environment such as direct sunlight.
【００１５】筒体２０は地上縮径部２２と埋設位置の縮
径部２３との２個所で、その外面がローラ等で縮径され
ており、プラスチック管３０の外面を縮径して内挿した
鋼管４０の環状凹凸溝４２、４３に圧着し、シールして
固定している。また筒体２０の上端は外面樹脂被覆鋼管
４０の樹脂被膜４１の外面まで延びて覆っており、プラ
スチック管３０の上端部に装着したゴムリング２１を圧
縮して、外部からの水密を計っている。このため金属製
筒体２０と外面樹脂被覆鋼管４０の鋼管部分とは接触し
ていない。The outer surface of the cylindrical body 20 is reduced by a roller or the like at two locations, that is, a reduced-diameter portion 22 on the ground and a reduced-diameter portion 23 at an embedding position. The outer surface of the plastic pipe 30 is reduced in diameter and inserted. The steel pipe 40 is press-fitted to the annular concave and convex grooves 42 and 43 and sealed and fixed. The upper end of the cylindrical body 20 extends to cover the outer surface of the resin coating 41 of the outer resin-coated steel pipe 40, and compresses the rubber ring 21 attached to the upper end of the plastic pipe 30 to measure watertightness from the outside. . For this reason, the metal cylindrical body 20 does not contact the steel pipe portion of the outer resin-coated steel pipe 40.
【００１６】外面樹脂被覆鋼管４０はカラー鋼管の呼び
サイズ２５Ａを用い、プラスチック管３０はガス用ポリ
エチレン管の呼びサイズ３０Ａを用いている。ガス用ポ
リエチレン管の内径は３４．２ｍｍで、カラー鋼管の樹
脂被膜４１を除く外径は３４ｍｍであり、両者を加工し
なくとも樹脂被膜４１を剥すだけでマッチして挿入でき
都合がよい。本実施例のガスメータ接続用ライザー管は
全長約１、２Ｍで、外面樹脂被覆鋼管４０の長さが約１
Ｍ、プラスチック管３０の長さが約６５０ｍｍ、筒体２
０の長さが約５００ｍｍである。そして筒体２０の中間
部分で埋設部と地上部に分けられ、埋設部即ちプラスチ
ック管３０と鋼管４０との下端接続縮径部は地上から５
０ｍｍを確保するように配管される。従って筒体２０の
縮径部は地上位置縮径部２２と埋設位置縮径部２３の２
個所で行われており、外面樹脂被覆鋼管４０とプラスチ
ック管３０のシールが行われている。The outer resin-coated steel pipe 40 has a nominal size of 25A of a color steel pipe, and the plastic pipe 30 has a nominal size of 30A of a polyethylene pipe for gas. The inner diameter of the polyethylene pipe for gas is 34.2 mm, and the outer diameter of the color steel pipe excluding the resin coating 41 is 34 mm. The riser pipe for connecting the gas meter of the present embodiment has a total length of about 1 and 2M, and the outer resin-coated steel pipe 40 has a length of about 1
M, the length of the plastic tube 30 is about 650 mm, and the cylindrical body 2
The length of 0 is about 500 mm. The middle portion of the cylindrical body 20 is divided into a buried portion and a ground portion, and the buried portion, that is, the reduced diameter connection portion at the lower end between the plastic pipe 30 and the steel pipe 40 is 5 mm from the ground.
It is piped so as to secure 0 mm. Therefore, the diameter-reduced portion of the cylindrical body 20 is two of the ground position reduced-diameter portion 22 and the buried-position reduced diameter portion 23.
The sealing is performed between the outer surface resin-coated steel pipe 40 and the plastic pipe 30.
【００１７】このため一部埋設される筒体２０と外面樹
脂被覆鋼管４０とは電気的に接触せず、絶縁が果たさ
れ、マクロセル腐蝕の問題が生じない。更に外面樹脂被
覆鋼管４０は地中から立上がってガスメータ８と配管さ
れるので、ガスメータ８を建物等に支持しなくても固定
する。また火災等で地上部のプラスチック管３０が消失
したとしても、埋設位置で保護管２０の縮径による外面
樹脂被覆鋼管４０とプラスチック管３０のシールが確保
されており、地上からの埋設深さ５０ｍｍあれば熱影響
が及ばないことが実験で確認されている。このため配管
全体の耐火災シール性が確保されて鋼管とプラスチック
管の接続状態が維持され、ガス漏れがなく安全が確保さ
れる。またプラスチック管３０が地上に立ち上げられた
部分でも筒体２０の縮径によるシールが行われているの
で、２重シールとなり地中埋設部で内部ガスが漏れ出す
恐れがなく、安全が確保される。Therefore, the partially buried cylindrical body 20 and the outer surface resin-coated steel pipe 40 do not make electrical contact with each other, insulation is achieved, and the problem of macrocell corrosion does not occur. Further, since the outer resin-coated steel pipe 40 rises from the ground and is connected to the gas meter 8, it is fixed without supporting the gas meter 8 on a building or the like. Even if the plastic pipe 30 on the ground is lost due to a fire or the like, the seal between the outer resin-coated steel pipe 40 and the plastic pipe 30 is secured at the embedding position by reducing the diameter of the protective pipe 20, and the embedding depth from the ground is 50 mm. Experiments have shown that if there is, there is no thermal effect. For this reason, fire resistance of the entire pipe is secured, the connection between the steel pipe and the plastic pipe is maintained, and safety is ensured without gas leakage. In addition, since the plastic pipe 30 is sealed by reducing the diameter of the cylindrical body 20 even at the portion where the plastic pipe 30 is set up on the ground, there is no danger of internal gas leaking from the underground buried portion, and safety is secured. You.
【００１８】図３は本発明の別の実施例を示すガスメー
タ接続用ライザー管で、この実施例では、金属製筒体２
５が短く、プラスチック管３０の地上部と地中部とに分
けて装着して縮径してある。またこの縮径した筒体２
５、２５の外面から耐候性を有する塩化ビニル樹脂製収
縮チューブによる保護管２６を被せて覆っている。この
保護管２６は外面樹脂被覆鋼管４０の樹脂被覆４１と一
体で形成することでも良い。この場合も前記実施例と同
様に火災時の安全性、外面樹脂被覆鋼管４０の絶縁性、
プラスチック管３０の耐候性及び傷付が防止され、安全
が確保される。FIG. 3 shows a gas meter connecting riser tube according to another embodiment of the present invention.
5 is short, and the diameter of the plastic pipe 30 is reduced by being mounted separately on the ground portion and the underground portion. In addition, this reduced diameter cylindrical body 2
A protective tube 26 made of a vinyl chloride resin shrink tube having weather resistance is covered over the outer surfaces of the protective tubes 5 and 25. The protective tube 26 may be formed integrally with the resin coating 41 of the outer resin-coated steel tube 40. In this case, as in the previous embodiment, fire safety, insulation of the outer resin-coated steel pipe 40,
Weather resistance and scratching of the plastic tube 30 are prevented, and safety is ensured.
【００１９】図４は更に本発明の別の実施例を示すガス
メータ接続用ライザー管で、この実施例では前記実施例
の金属製筒体の縮径による接続に代えて、外面樹脂被覆
鋼管４０の下端に射出成型でプラスチック管３０を一体
成型している。外面樹脂被覆鋼管４０は成型部の外面樹
脂被覆層４１を剥がして裸管状態の外面に環状凹凸溝４
２、４３を形成し、この外面にホットメルト接着剤層を
形成して射出成型用金型内でプラスチック管３０が射出
成型される。前記鋼管４０の外面樹脂被覆層４１の外面
にプラスチック管３０を射出成型して一体化しても良
い。またプラスチック管３０を一体化射出成型した後、
鋼管４０との端部にＯリング３１を装着し、この外面に
プラスチック管３０の地上立ち上げ部分を覆う長さ分、
保護カバー２７を装着して外部環境と遮断している。保
護カバー２７は本実施例では耐候性の良い塩化ビニル製
の収縮チューブを用いており、装着後温水等の熱を加え
て収縮させ、プラスチック管３０の外面に密着させる。
この保護カバー２７は収縮チューブに代えてテープ状部
材を巻き付けて外部環境から保護遮断しても良い。更に
プラスチック管の下端部は略直角に曲げておき、埋設プ
ラスチック管との接続を容易にすることができる。FIG. 4 is a gas meter connecting riser tube according to another embodiment of the present invention. In this embodiment, the outer resin-coated steel tube 40 is replaced with a metal tube of the above-described embodiment by reducing the diameter of the tube. A plastic tube 30 is integrally molded at the lower end by injection molding. The outer resin-coated steel pipe 40 is formed by peeling the outer resin coating layer 41 of the molded portion and forming an annular concave-convex groove 4 on the outer surface in a bare pipe state.
2 and 43 are formed, a hot melt adhesive layer is formed on the outer surface, and the plastic tube 30 is injection-molded in an injection mold. The plastic tube 30 may be integrated with the outer surface of the outer resin coating layer 41 of the steel tube 40 by injection molding. Also, after the plastic tube 30 is integrally injection molded,
An O-ring 31 is attached to the end of the steel pipe 40, and the outer surface of the O-ring 31 covers a portion of the plastic pipe 30 that is set up above the ground.
A protective cover 27 is attached to shut off the external environment. In this embodiment, the protective cover 27 is made of a shrinkable tube made of vinyl chloride having good weather resistance. The shrinkable tube is shrunk by applying heat such as warm water after mounting, and is adhered to the outer surface of the plastic tube 30.
This protective cover 27 may be wound around a tape-shaped member instead of the shrinkable tube to protect and shield it from the external environment. Further, the lower end of the plastic pipe is bent at a substantially right angle to facilitate connection with the embedded plastic pipe.
【００２０】[0020]
【発明の効果】以上のごとく本発明は、ガスメータに接
続する鋼管が土壌に接することなく地中のプラスチック
管から立ち上げ配管されるので、鋼管が土壌に接するこ
とによる種々の電気的腐食の問題が解消される。また地
上の配管部が火災等に遭遇して地上に立ち上がるプラス
チック管が焼失したとしても、鋼管がプラスチック管の
地中埋設部まで内挿して埋設地中部で密封しているの
で、埋設位置でプラスチック管と鋼管のシールが確保さ
れて熱の影響が及ばなく、火災時におけるガス漏れの問
題が解消される。またプラスチック管が地中埋設部から
地上にまで立ち上げて鋼管を内挿して密着シール固定さ
れているので、地中埋設部は耐食性を有すプラスチック
管で連続して繋がっており、内部ガスが地中埋設部で漏
れ出す恐れがない。また金属製筒体や耐候性を有す保護
管、保護カバー等によってプラスチック管の地上立ち上
げ部が外部環境から保護遮断され、紫外線劣化等の問題
もない。更にガスメータは剛性のある鋼管で支持固定さ
れるので、ガスメータを建物等に固定しなくとも支持固
定でき、ガスメータの設置位置に規制を受けない。従っ
て従来のごとく絶縁継手を設けるなどの防食処理を行う
必要がなく、安全に且つ容易に地中のプラスチック管か
ら地上のガスメータに配管施工が行える。As described above, according to the present invention, since the steel pipe connected to the gas meter is set up from the plastic pipe in the ground without contacting the soil, the steel pipe comes into contact with the soil and thus has various problems of electric corrosion. Is eliminated. Again
The upper piping section encounters a fire etc. and stands up on the ground
Even if the tick tube is burned out, the steel tube
It is inserted into the underground buried part and sealed at the buried underground part
The seal between the plastic pipe and the steel pipe is secured at the buried position.
Gas influence in the event of fire
The problem is solved. The plastic tube from the underground portion
Stand up to the ground, insert a steel pipe, and tightly seal it.
Buried parts are made of corrosion-resistant plastic
The pipes are connected continuously, and there is no danger of internal gas leaking out from the underground buried part . Further, the rising portion of the plastic tube above the ground is protected and shielded from the external environment by a metal cylindrical body, a protective tube having weather resistance, a protective cover, and the like, and there is no problem such as deterioration of ultraviolet rays. Furthermore, since the gas meter is supported and fixed by a rigid steel pipe, it is not necessary to fix the gas meter to a building or the like.
It is not regulated by the installation position of the gas meter. Therefore, it is not necessary to perform anticorrosion treatment such as providing an insulating joint as in the related art, and piping can be safely and easily performed from an underground plastic pipe to a ground gas meter.
【図１】 本発明の一実施例を示す流体配管用ライザー
管を配管した状態の斜視図である。FIG. 1 is a perspective view of a state in which a riser pipe for a fluid pipe according to an embodiment of the present invention is piped.
【図２】 本発明の一実施例を示す流体配管用ライザー
管の半断面図である。FIG. 2 is a half sectional view of a riser pipe for a fluid pipe, showing one embodiment of the present invention.
【図３】 本発明の別の実施例を示す流体配管用ライザ
ー管の半断面図である。FIG. 3 is a half sectional view of a riser pipe for a fluid pipe showing another embodiment of the present invention.
【図４】 本発明の別の実施例を示す流体配管用ライザ
ー管の半断面図である。FIG. 4 is a half sectional view of a riser pipe for a fluid piping, showing another embodiment of the present invention.
５ 埋設プラスチック管 ６ プラスチッ
ク管用継手 ８ ガスメータ １０ ガスメー
タ接続用ライザー管 ２０、２５ 金属製筒体 ２１ ゴムリン
グ ２２ 地上位置縮径部 ２３ 埋設位置
縮径部 ２６ 保護管 ２７ 保護カバ
ー ３０ プラスチック管 ３１ Ｏリング ４０ 外面樹脂被覆鋼管 ４１ 樹脂皮膜 ４２、４３ 環状凹凸溝Reference Signs List 5 embedded plastic pipe 6 plastic pipe joint 8 gas meter 10 gas meter connection riser pipe 20, 25 metal cylinder 21 rubber ring 22 ground position reduced diameter part 23 embedded position reduced diameter part 26 protective pipe 27 protective cover 30 plastic pipe 31 O-ring 40 outer surface resin coated steel pipe 41 resin film 42, 43 annular uneven groove
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平９−303670（ＪＰ，Ａ) 特開 平５−180386（ＪＰ，Ａ) 特開 昭60−205087（ＪＰ，Ａ) 特開 平10−238687（ＪＰ，Ａ) 特開 平９−303650（ＪＰ，Ａ) 実公 平５−33936（ＪＰ，Ｙ２) 実公 昭63−12300（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) F16L 9/00 - 9/22 F16L 21/00 - 21/08 F16L 47/00 - 47/06 F16L 58/00 - 58/18 F17D 1/00 - 5/08 B29C 47/00 - 47/96 G01F 15/18 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-303670 (JP, A) JP-A-5-180386 (JP, A) JP-A-60-205087 (JP, A) JP-A-10-108 238687 (JP, A) JP-A-9-303650 (JP, A) JP 5-33936 (JP, Y2) JP-A 63-12300 (JP, Y2) (58) Fields investigated (Int. Cl. 7 , DB name) F16L 9/00-9/22 F16L 21/00-21/08 F16L 47/00-47/06 F16L 58/00-58/18 F17D 1/00-5/08 B29C 47/00- 47/96 G01F 15/18
Claims (9)
地上に立ち上げられるプラスチック管と、一端は該プラ
スチック管の地上端から地中の埋設部に亘って内挿して
前記プラスチック管と接続し他端は地上のガスメータに
連結する鋼管と、該鋼管を内挿したプラスチック管の少
なくとも地上に立ち上げられた部分の外面および鋼管を
内挿したプラスチック管の地中部位置の外面とに装着し
て縮径しプラスチック管と鋼管との間を密封固定する金
属製の筒体と、よりなることを特徴とするガスメータ接
続用ライザー管。1. A plastic pipe which is connected to an underground buried plastic pipe and rises to the ground, and one end of which is inserted from the ground end of the plastic pipe to an underground buried part.
A steel pipe connected to the plastic pipe and having the other end connected to a gas meter on the ground, and an outer surface and a steel pipe of at least a portion of the plastic pipe having the steel pipe inserted therein, which is raised above the ground.
A riser pipe for connecting a gas meter, comprising: a metal tubular body which is attached to an outer surface of an inserted plastic pipe at an underground position to reduce the diameter and hermetically seal between the plastic pipe and a steel pipe.
部分を裸管状態で内挿してあり、前記筒体を縮径する部
分に対応する鋼管の外面に環状の凹凸溝を形成してプラ
スチック管の内面と圧接してあることを特徴とする請求
項１記載のガスメータ接続用ライザー管。2. The steel pipe according to claim 1, wherein a part to be inserted into the plastic pipe is inserted in a bare pipe state, and an annular concave and convex groove is formed on an outer surface of the steel pipe corresponding to a part to reduce the diameter of the cylindrical body. The riser tube for connecting a gas meter according to claim 1, wherein the riser tube is in pressure contact with an inner surface of the tube.
部分の外面に耐候性を有す保護管を覆ったことを特徴と
する請求項１乃至２記載のガスメータ接続用ライザー
管。3. Before SL gas meter connected riser pipe according to claim 1 or 2, wherein the plastic tube is characterized in that covering the protective tube having a resistance to weather resistance to the outer surface of a portion that rises on the ground.
ガス用ポリエチレン管で、前記鋼管は外面に樹脂被覆し
た呼び口径２５Ａのガス用カラー鋼管からなることを特
徴とする請求項１乃至３記載のガスメータ接続用ライザ
ー管。4. The gas meter according to claim 1, wherein the plastic pipe is a polyethylene pipe for gas having a nominal diameter of 30A, and the steel pipe is formed of a colored steel pipe for gas having a nominal diameter of 25A having an outer surface coated with a resin. Riser tube for connection.
の埋設プラスチック管に接続するプラスチック管とから
なり、該鋼管とプラスチック管とを連結したガスメータ
接続用ライザー管において、前記鋼管の端部外面に前記
プラスチック管を射出成型で一体成型して設け、該プラ
スチック管の上端は地中から地上に立ち上げ配管され、
鋼管の下端はプラスチック管内の地中埋設位置に配管さ
れることを特徴とするガスメータ接続用ライザー管。5. A gas meter connection riser pipe comprising a steel pipe connected to a ground-based gas meter and a plastic pipe connected to an underground buried plastic pipe, and an outer surface of an end portion of the steel pipe connected to the steel pipe and the plastic pipe. The plastic pipe is provided by integral molding by injection molding, and the upper end of the plastic pipe is set up from the ground to the ground, and piped,
A lower end of the steel pipe is piped at a position buried underground in a plastic pipe.
該接着剤層を介して前記プラスチック管を射出成型で設
けたことを特徴とする請求項５記載のガスメータ接続用
ライザー管。6. An adhesive layer is provided on an outer surface of an end of the steel pipe,
The riser tube for connecting a gas meter according to claim 5, wherein the plastic tube is provided by injection molding via the adhesive layer.
い、端部外面の外面樹脂被覆層を剥がした裸管状態の外
面にホットメルト接着剤層を設けて前記プラスチック管
を射出成型で設けたことを特徴とする請求項５乃至６記
載のガスメータ接続用ライザー管。7. The steel pipe is a steel pipe coated with an outer resin, a hot melt adhesive layer is provided on an outer surface of a bare pipe in which an outer resin coating layer on an end outer surface is peeled off, and the plastic pipe is provided by injection molding. 7. The riser tube for connecting a gas meter according to claim 5, wherein:
外面は、外気と遮断する保護カバーで覆ったことを特徴
とする請求項５乃至７記載のガスメータ接続用ライザー
管。8. The gas meter connection riser tube according to claim 5, wherein an outer surface of the plastic tube rising above the ground is covered with a protective cover that blocks external air.
曲げられていることを特徴とする請求項１乃至８記載の
ガスメータ接続用ライザー管。9. The gas meter connection riser tube according to claim 1, wherein the buried portion of the plastic tube is bent at a substantially right angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11000903A JP3088710B2 (en) | 1998-05-22 | 1999-01-06 | Riser tube for gas meter connection |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14091698 | 1998-05-22 | ||
| JP10-211237 | 1998-07-27 | ||
| JP21123798 | 1998-07-27 | ||
| JP10-140916 | 1998-07-27 | ||
| JP11000903A JP3088710B2 (en) | 1998-05-22 | 1999-01-06 | Riser tube for gas meter connection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000104876A JP2000104876A (en) | 2000-04-11 |
| JP3088710B2 true JP3088710B2 (en) | 2000-09-18 |
Family
ID=27274667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11000903A Expired - Lifetime JP3088710B2 (en) | 1998-05-22 | 1999-01-06 | Riser tube for gas meter connection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3088710B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002039449A (en) * | 2000-07-27 | 2002-02-06 | Hitachi Metals Ltd | Bellows pipe with short pipe |
| JP4649057B2 (en) * | 2001-05-18 | 2011-03-09 | 大阪瓦斯株式会社 | Gas pipe riser pipe |
| CN111271526A (en) * | 2020-03-16 | 2020-06-12 | 广州碧源管业有限公司 | Antibacterial composite pipe and preparation method thereof |
-
1999
- 1999-01-06 JP JP11000903A patent/JP3088710B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000104876A (en) | 2000-04-11 |
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