JPH11287366A - Conversion joint - Google Patents
Conversion jointInfo
- Publication number
- JPH11287366A JPH11287366A JP9028398A JP9028398A JPH11287366A JP H11287366 A JPH11287366 A JP H11287366A JP 9028398 A JP9028398 A JP 9028398A JP 9028398 A JP9028398 A JP 9028398A JP H11287366 A JPH11287366 A JP H11287366A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- connection
- conversion joint
- metal
- pipe
- 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.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 48
- 229920005989 resin Polymers 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 238000012856 packing Methods 0.000 claims abstract description 14
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 13
- 239000000057 synthetic resin Substances 0.000 claims abstract description 13
- 239000003566 sealing material Substances 0.000 claims description 12
- 230000009970 fire resistant effect Effects 0.000 claims description 5
- 238000007689 inspection Methods 0.000 abstract description 9
- 230000008878 coupling Effects 0.000 abstract 3
- 238000010168 coupling process Methods 0.000 abstract 3
- 238000005859 coupling reaction Methods 0.000 abstract 3
- 230000035939 shock Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000007500 overflow downdraw method Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Joints With Pressure Members (AREA)
- Joints With Sleeves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、樹脂管と金属管と
の間に介在されてそれらの材質の異なる２つの管を接続
するための変換継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conversion joint interposed between a resin pipe and a metal pipe to connect two pipes made of different materials.
【０００２】[0002]
【従来の技術】ガス配管の地中部分に樹脂管が採用され
ている場合、従来は、図５のように家屋の外壁などに近
接して設置されるガスメータＭを備えたメータユニット
Ｕを、同図のように地表面Ｇを横切って立ち上げあるい
は立ち下げた金属製の波付け可撓管Ｃ，Ｃに接続し、そ
れらの波付け可撓管Ｃ，Ｃを、地中で変換継手Ｂを介し
て樹脂管（不図示）に接続するようにしており、このよ
うな工法を採用することによって地上に露出した部分の
耐火性を確保していた。2. Description of the Related Art When a resin pipe is used in the underground portion of a gas pipe, a meter unit U having a gas meter M installed near an outer wall of a house as shown in FIG. As shown in the figure, the corrugated flexible tubes C, C rising or falling across the ground surface G are connected to each other, and the corrugated flexible tubes C, C are connected underground to the conversion joint B. A resin pipe (not shown) is connected through the tub, and by adopting such a construction method, the fire resistance of the portion exposed to the ground is ensured.
【０００３】上記変換継手Ｂは、図４のように、地中に
埋設された樹脂管（ポリエチレン管）が接続される合成
樹脂製の第１接続筒部１１の根元部に具備された連結筒
部１２が、金属製の波付け可撓管Ｃの端部が接続された
金属製の第２接続筒部２１の根元部に具備された被連結
筒部２２に結合されており、上記第１接続筒部１１のス
リーブ部１３に樹脂管がヒートフュージョン（ＨＦ）あ
るいはエレクトリックフュージョン（ＥＦ）といった熱
融着方式で接合されたり、メカニカル継手や差し込み継
手を介して接合されたりする。As shown in FIG. 4, the conversion joint B is a connecting cylinder provided at the base of a synthetic resin first connecting cylinder 11 to which a resin pipe (polyethylene pipe) buried underground is connected. The portion 12 is connected to a connected tube portion 22 provided at the base of a second metal connection tube portion 21 to which the end portion of the metal corrugated flexible tube C is connected. The resin tube is joined to the sleeve portion 13 of the connection tube portion 11 by a heat fusion method such as heat fusion (HF) or electric fusion (EF), or is joined via a mechanical joint or a plug joint.
【０００４】[0004]
【発明が解決しようとする課題】ところで、図５のよう
に金属製の波付け可撓管Ｃで地表面Ｇを横切らせて配管
の耐火性を確保した場合、金属製の波付け可撓管Ｃと樹
脂管との接続箇所、すなわちそれらの両管を接続してい
る変換継手Ｂが地中に埋設されることになるので、変換
継手Ｂの設置工事やその保安検査などが大掛かりになる
という問題がある。In the case where the fire resistance of the piping is ensured by traversing the ground surface G with a metal corrugated flexible tube C as shown in FIG. 5, the metal corrugated flexible tube is used. Since the connection point between C and the resin pipe, that is, the conversion joint B connecting both pipes, will be buried underground, the installation work of the conversion joint B and its security inspection will be large-scale. There's a problem.
【０００５】一方、樹脂管で地表面Ｇを横切るようにし
てその樹脂管を地中と地上との間に亘って設置すると、
その樹脂管の一部が地上に突出するので配管の耐火性が
確保されなくなる。そこで、図４に仮想線で示した地表
面Ｇを変換継手Ｂが横切るようにその変換継手Ｂの一部
を地中に埋設し、かつ地中で第１接続筒部１１のスリー
ブ部１３に仮想線で示したように樹脂管５を接続するこ
とが考えられる。しかし、そのようにすると、第１接続
筒部１１と樹脂管５との接続箇所の耐衝撃性に関して問
題を生じることが判明した。On the other hand, when the resin pipe is installed between the ground and the ground so as to cross the ground surface G with the resin pipe,
Since a part of the resin pipe projects above the ground, fire resistance of the pipe cannot be secured. Therefore, a part of the conversion joint B is buried in the ground so that the conversion joint B crosses the ground surface G shown by a virtual line in FIG. It is conceivable to connect the resin pipe 5 as indicated by a virtual line. However, it has been found that doing so causes a problem with respect to the impact resistance of the connection portion between the first connection cylinder 11 and the resin pipe 5.
【０００６】本発明は以上の問題や状況に鑑みてなされ
たものであり、金属製の可撓管と樹脂管の接続に用いる
変換継手に、樹脂管との接続部分を保護する機能を付与
させることによって、その変換継手で地表面を横切らせ
るようにしても耐火性や耐衝撃性に関して問題を生じ
ず、しかも、変換継手の設置工事や漏洩検査などの保安
検査を容易に行うことのできる変換継手を提供すること
を目的とする。The present invention has been made in view of the above problems and situations, and provides a conversion joint used for connecting a metal flexible tube and a resin tube with a function of protecting a connection portion between the resin tube and the resin tube. As a result, even if the conversion joint is made to cross the ground surface, there is no problem regarding fire resistance and impact resistance, and furthermore, it is possible to easily perform security inspection such as installation work of conversion joint and leakage inspection. It is intended to provide a joint.
【０００７】[0007]
【課題を解決するための手段】請求項１に係る発明の変
換継手は、樹脂管が接続される合成樹脂製の第１接続筒
部と、金属管が接続される金属製の第２接続筒部とを有
し、上記第１接続筒部の根元部に具備された合成樹脂製
の連結筒部と上記第２接続筒部の根元部に具備された金
属製の被連結筒部とが結合されてなる変換継手におい
て、上記第１接続筒部の上記連結筒部を覆って耐火性を
有する鞘管が設けられ、この鞘管の根元部が、上記第２
接続筒部に外嵌合状に挿入されていると共に、この鞘管
の根元部と上記第２接続筒部との間に耐火性の第１パッ
キンが、この鞘管の先端部と上記第１接続筒部の上記連
結筒部との間に耐火性の第２パッキンが、それぞれ介在
されている、というものである。According to a first aspect of the present invention, there is provided a conversion joint comprising: a first connection tube made of synthetic resin to which a resin tube is connected; and a second connection tube made of metal to which a metal tube is connected. And a connecting tube made of synthetic resin provided at the base of the first connection tube and a metal connected tube provided at the base of the second connection tube. In the conversion joint formed as described above, a sheath tube having fire resistance is provided so as to cover the connection tube portion of the first connection tube portion, and a root portion of the sheath tube is connected to the second connection tube portion.
A first refractory packing, which is inserted into the connection tube portion in an outer fitting manner and is located between a root portion of the sheath tube and the second connection tube portion, is provided between the tip of the sheath tube and the first tube. A second fire-resistant packing is interposed between the connection cylinder and the connection cylinder.
【０００８】この発明の変換継手において、その変換継
手の鞘管側の一部を地中に埋設すると共に、その変換継
手の第１接続筒部に地中に埋設された樹脂管を接続し、
その変換継手の第２接続筒部に地上の金属管を接続する
ようにすることによってその変換継手が地表面を横切る
ように施工しても、樹脂管が地上に出ないので耐火性が
確保され、また、樹脂管が接続される第１接続筒部が鞘
管によって覆われているので、その第１接続筒部が合成
樹脂製であるとしてもその第１接続筒部が直接に衝撃を
受けなくなって耐衝撃性が高められる。また、変換継手
が地中に完全に埋設されていないので、その設置工事や
漏洩検査なとの保安検査を容易に行えるようになる。In the conversion joint according to the present invention, a part of the conversion joint on the side of the sheath tube is buried in the ground, and a resin pipe buried in the ground is connected to the first connection tubular portion of the conversion joint.
By connecting a metal pipe on the ground to the second connection cylinder part of the conversion joint, even if the conversion joint is constructed so as to cross the ground surface, fire resistance is ensured because the resin pipe does not come out on the ground. In addition, since the first connection tube to which the resin tube is connected is covered with the sheath tube, even if the first connection tube is made of synthetic resin, the first connection tube is directly impacted. It is eliminated and the impact resistance is improved. Further, since the conversion joint is not completely buried in the ground, the installation work and the security inspection such as the leak inspection can be easily performed.
【０００９】本発明に係る変換継手は、請求項２に記載
したように、上記鞘管の先端部と上記第１接続筒部の上
記連結筒部との間であって、上記第１パッキンの介在箇
所の外側に防水シール材が介在されていることが望まし
く、この構成を採用すると、変換継手の内部への水の浸
入が防水シール材によって阻止される。According to a second aspect of the present invention, there is provided a conversion joint between the distal end portion of the sheath tube and the connection tube portion of the first connection tube portion, wherein It is desirable that a waterproof sealing material is interposed outside the intervening portion. When this configuration is adopted, infiltration of water into the inside of the conversion joint is prevented by the waterproof sealing material.
【００１０】また、請求項３に係る発明のように、耐火
性の鞘管には、金属管を用いることが経済性や入手可能
性の面で好ましい。[0010] Further, as in the invention according to claim 3, it is preferable to use a metal tube for the refractory sheath tube in terms of economy and availability.
【００１１】[0011]
【発明の実施の形態】図１は本発明に係る変換継手Ａに
金属管としての波付け可撓管Ｃを接続した場合の部分縦
断側面図、図２は図１のＩＩ部の拡大図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partial longitudinal sectional side view when a corrugated flexible tube C as a metal tube is connected to a conversion joint A according to the present invention, and FIG. 2 is an enlarged view of a portion II in FIG. is there.
【００１２】変換継手Ａは、樹脂管（不図示）が接続さ
れる合成樹脂製の第１接続筒部１１と、金属管Ｃが接続
される金属製の第２接続筒部２１とを有している。上記
第１接続筒部１１は、図４で説明した従来の変換継手Ｂ
の第１接続筒部１１に比べて、連結筒部（後述する）１
２やスリーブ部１３の長さが長くなっている。第２接続
筒部２１はその根元部が被連結筒部２２となされてお
り、その被連結筒部２２が、上記第１接続筒部１１の根
元部に具備された連結筒部１２に埋入状態で結合されて
いる。このような連結筒部１２と被連結筒部２２との結
合は、第１接続筒部１１を第２接続筒部２１と共にイン
サート成形することによって行われている。図例では、
被連結筒部２２の複数箇所に開口２３を開設し、それら
の開口２３を通して被連結筒部２２の外側と内側とに第
１接続筒部１１を形成している合成樹脂（たとえばポリ
エチレン樹脂）を回り込ませて両者の結合強度を高めて
いる。The conversion joint A has a first connection tube portion 11 made of synthetic resin to which a resin tube (not shown) is connected, and a second connection tube portion 21 made of metal to which a metal tube C is connected. ing. The first connection cylinder 11 is formed of the conventional conversion joint B described with reference to FIG.
Of the connecting tube portion (to be described later) 1
2 and the length of the sleeve portion 13 are long. The base of the second connecting cylinder 21 is a connected cylinder 22, and the connected cylinder 22 is embedded in the connecting cylinder 12 provided at the base of the first connection cylinder 11. Combined in state. The connection between the connecting tube portion 12 and the connected tube portion 22 is performed by insert-molding the first connecting tube portion 11 together with the second connecting tube portion 21. In the example shown,
Openings 23 are opened at a plurality of locations of the connected cylindrical portion 22, and a synthetic resin (for example, polyethylene resin) forming the first connecting cylindrical portion 11 outside and inside the connected cylindrical portion 22 through the openings 23 is provided. It is wrapped around to increase the bonding strength between the two.
【００１３】連結筒部１２と被連結筒部２２との結合部
分における最内周側に位置している突当り面（上記重な
り面５の一部分を形成している）２４を挟む両側に、支
持リング３１に保持されたシール材３２，３３が介在さ
れており、これらのシール材３２，３３によって、連結
筒部１２と被連結筒部２２との重なり面２５に流体漏れ
を生じさせるような隙間が生じていてもその隙間に管路
の流体が入らないようになっている。なお、支持リング
３１は、ねじ部３４を介して第２接続筒部２１に結合さ
れている。A support ring is provided on both sides of the abutting surface (forming a part of the overlapping surface 5) 24 located on the innermost peripheral side of the connecting portion between the connecting tube portion 12 and the connected tube portion 22. Seal members 32 and 33 held by 31 are interposed, and these seal members 32 and 33 form a gap that causes fluid leakage on the overlapping surface 25 between the connecting cylinder portion 12 and the connected cylinder portion 22. Even if it occurs, the fluid in the pipeline is prevented from entering the gap. Note that the support ring 31 is coupled to the second connection tubular portion 21 via a screw portion 34.
【００１４】図１及び図２のように、第２接続筒部２１
には、合成樹脂製の被覆チューブ４１によって被覆され
た金属管としての波付け可撓管Ｃが接続されている。こ
の波付け可撓管Ｃは先端部が被覆チューブ４１から突き
出ている。第２接続筒部２１と波付け可撓管Ｃとの間に
は、外部から管路への水の浸入を防ぐためのシール部４
２と、波付け可撓管Ｃの抜出しを防ぐための抜止め機構
４３とが設けられている。すなわち、第２接続筒部２１
の端部と押輪押輪５１とがねじ部５２を介してねじ込ま
れており、押輪７３に保持されたＴ字状断面のゴム製シ
ール材５３が被覆チューブ４１に密着している。このた
め、押輪５１と被覆チューブ４１との間の隙間が、シー
ル材５３によって形成される上記シール部４２によって
塞がれて外部からの水の浸入が防止されている。また、
波付け可撓管Ｃの先端側の谷部に押付けリング５４が嵌
め込まれていると共に、この押付けリング５４が押輪５
１により押し付けられている。そして、押付けリング５
４と第２接続筒部２１に形成された段付面２６とにより
波付け可撓管Ｃの先端側の山部が圧潰された状態で挾圧
保持されている。このような抜止め機構４３の作用によ
って波付け金属管Ｃが抜け止めされている。なお、圧潰
されている波付け可撓管Ｃの端部や押付けリング５４と
上記第２接続筒部２１との間にはゴム製のシール材５５
が介在されてその箇所がシールされている。As shown in FIGS. 1 and 2, the second connecting cylinder 21
Is connected to a corrugated flexible tube C as a metal tube covered with a covering tube 41 made of synthetic resin. The tip of the corrugated flexible tube C protrudes from the coating tube 41. A seal portion 4 between the second connection cylinder portion 21 and the corrugated flexible tube C for preventing water from entering the pipeline from outside.
2 and a retaining mechanism 43 for preventing the corrugated flexible tube C from being withdrawn. That is, the second connection cylinder 21
Is screwed through a screw portion 52, and a rubber sealing material 53 having a T-shaped cross section held by a pressing ring 73 is in close contact with the covering tube 41. For this reason, the gap between the pressing wheel 51 and the coating tube 41 is closed by the sealing portion 42 formed by the sealing material 53, thereby preventing water from entering from outside. Also,
A pressing ring 54 is fitted in a valley on the distal end side of the corrugated flexible tube C, and the pressing ring 54 is
Pressed by one. And pressing ring 5
4 and the stepped surface 26 formed in the second connection cylinder portion 21, the crimped flexible tube C is pinched and held in a crushed state at the tip end side of the flexible tube C. The corrugated metal tube C is prevented from coming off by the action of such a retaining mechanism 43. Note that a rubber sealing material 55 is provided between the end of the crushed corrugated flexible tube C and the pressing ring 54 and the second connection cylinder 21.
Is interposed and the portion is sealed.
【００１５】また、被覆チューブ４１を有する波付け可
撓管Ｃの外側に保護管４４が嵌め込まれている。そし
て、保護管４４の一端部と波付け可撓管Ｃの被覆チュー
ブ４１との隙間に雨水などの水が浸入することを防ぐた
めに防水キヤップ４５が取り付けられていると共に、保
護管４４の他端部側からその保護管４４と波付け可撓管
Ｃの被覆チューブ４１との隙間に水が入ることを防ぐた
めに防水機構６１が設けられている。この防水機構６１
は、外筒６２と、この外筒６２の一端部にねじ込まれた
止め輪６３と、外筒６２と保護管４４との間に介在され
たシール材６４，６５とからなり、シール材６４の抜落
ちが上記止め輪６３により防止されている。上記外筒６
２の他端部は、第１接続筒部１１の端部に外嵌されてい
る。A protection tube 44 is fitted outside the corrugated flexible tube C having the coating tube 41. A waterproof cap 45 is attached to prevent water such as rainwater from entering the gap between one end of the protection tube 44 and the covering tube 41 of the corrugated flexible tube C, and the other end of the protection tube 44 is provided. A waterproof mechanism 61 is provided to prevent water from entering the gap between the protective tube 44 and the covering tube 41 of the corrugated flexible tube C from the side. This waterproof mechanism 61
Consists of an outer cylinder 62, a retaining ring 63 screwed into one end of the outer cylinder 62, and sealing materials 64, 65 interposed between the outer cylinder 62 and the protection tube 44. The falling off is prevented by the retaining ring 63. Outer cylinder 6
The other end of 2 is externally fitted to the end of the first connection cylinder 11.
【００１６】次に、上記第１接続筒部１１の連結筒部１
２は、そのスリーブ部１３よりも肉厚になっていて、そ
の連結筒部１２の全長部分を覆って耐火性を有する鞘管
７１が設けられている。耐火性を有する鞘管７１には、
セラミック、ＦＲＰ、鉄管などを採用することが可能で
あるが、価格や入手容易性などの点から鉄管を用いるこ
とが望ましい。鞘管７１の根元部の外周側と内周側とに
環状の凹溝７２，７３が設けられていて、外周側の凹溝
７２にはＯリングなどの防水用のシール材７４が保持さ
れ、内周側の凹溝７３には耐火性の第１パッキン７５が
保持されている。また、鞘管７１の根元部には、突出部
７６が設けられている。そして、この鞘管７１の根元部
が上記外筒６２にねじ部７７を介してねじ込まれている
と共に、その根元部が上記第２接続筒部２１に外嵌合状
に挿入されていて、上記シール材７４が外筒６２の内周
面に弾接され、上記第１パッキン７５が上記第２接続筒
部２１の外周面に弾接されている。上記シール材７４や
第１パッキン７５によって変換継手Ａの内部への水の浸
入が防止される。他方、鞘管７１の先端部の内周側に２
つの環状の凹溝７８，７９が設けられていて、軸方向内
側の凹溝７９に保持された耐火性の第２パッキン８１が
第１接続筒部１１の連結筒部１２の端部外周面に弾接さ
れ、軸方向外側の凹溝７８に保持されたＯリングでなる
防水用のシール材８２が、同じく連結筒部１２の端部外
周面に弾接されている。これらのシール材８２や第２パ
ッキン８１によっても変換継手Ａの内部への水の浸入が
防止される。Next, the connecting tubular portion 1 of the first connecting tubular portion 11 will be described.
Numeral 2 is thicker than the sleeve portion 13 and is provided with a fire-resistant sheath tube 71 covering the entire length of the connecting tube portion 12. In the sheath tube 71 having fire resistance,
A ceramic, FRP, iron tube, or the like can be used, but it is preferable to use an iron tube in terms of price, availability, and the like. Annular concave grooves 72 and 73 are provided on the outer peripheral side and the inner peripheral side of the root portion of the sheath tube 71, and the outer peripheral side concave groove 72 holds a waterproof sealing material 74 such as an O-ring, A first refractory packing 75 is held in the concave groove 73 on the inner peripheral side. In addition, a protruding portion 76 is provided at the root of the sheath tube 71. The root portion of the sheath tube 71 is screwed into the outer cylinder 62 via a screw portion 77, and the root portion is inserted into the second connection cylinder portion 21 so as to be fitted externally. The seal member 74 is elastically contacted with the inner peripheral surface of the outer cylinder 62, and the first packing 75 is elastically contacted with the outer peripheral surface of the second connection cylinder 21. The sealing material 74 and the first packing 75 prevent water from entering the inside of the conversion joint A. On the other hand, 2
Two annular grooves 78 and 79 are provided, and a fire-resistant second packing 81 held in the axially inner groove 79 is provided on the outer peripheral surface of the end of the connection tube 12 of the first connection tube 11. A waterproof sealing material 82 made of an O-ring that is elastically contacted and held in the axially outer concave groove 78 is also elastically in contact with the outer peripheral surface of the end of the connecting tubular portion 12. The sealing material 82 and the second packing 81 also prevent water from entering the inside of the conversion joint A.
【００１７】図例の変換継手Ａにおいて、第１接続筒部
１１のスリーブ部１３には、図示していない樹脂管（た
とえばポリエチレン管）が、ヒートフュージョン方式あ
るいはエレクトリックフュージョン方式といった熱融着
方式で接合されたり、メカニカル継手や差し込み継手を
介して接合されたりする。In the conversion joint A shown in the figure, a resin tube (for example, a polyethylene tube) (not shown) is attached to the sleeve portion 13 of the first connection tube portion 11 by a heat fusion method such as a heat fusion method or an electric fusion method. They may be joined or joined via mechanical joints or bayonet joints.
【００１８】図５は上記した変換継手Ａの鞘管７１側の
一部を地中に埋設し、その変換継手Ａの第１接続筒部１
１のスリーブ部１３に地中に埋設された樹脂管５を接続
し、その変換継手Ａの第２接続筒部２１（図１及び図２
参照）に地上の金属管Ｃを接続するようにすることによ
ってその変換継手Ａが地表面を横切るように施工した事
例を示している。図５の事例では、メータユニットＵの
入口に接続される一次側配管に上記変換継手Ａを用い、
その出口に接続される二次側配管には従来例で説明した
変換継手Ｂが用いられている。FIG. 5 shows a state in which a part of the above-mentioned conversion joint A on the side of the sheath tube 71 is buried in the ground, and the first connection cylinder 1
The resin tube 5 buried underground is connected to the sleeve portion 13 of the first connection portion 1 and the second connection tube portion 21 of the conversion joint A (see FIGS. 1 and 2).
2), an example is shown in which the conversion joint A is connected across the ground surface by connecting a metal pipe C on the ground. In the case of FIG. 5, the conversion joint A is used for the primary pipe connected to the inlet of the meter unit U,
The conversion joint B described in the conventional example is used for the secondary pipe connected to the outlet.
【００１９】この工法であると、一次側配管に用いられ
ている樹脂管５が地上に出ないので耐火性が確保され、
また、樹脂管５が接続される第１接続筒部１１（図１及
び図２参照）が鞘管７１によって覆われているので、そ
の第１接続筒部１１が合成樹脂製であるとしてもその第
１接続筒部１１が直接に衝撃を受けなくなって耐衝撃性
が高められる。また、変換継手Ａが地中に完全に埋設さ
れていないので、その設置工事や漏洩検査なとの保安検
査を容易に行える。With this construction method, fire resistance is ensured because the resin pipe 5 used for the primary side pipe does not come out on the ground.
Further, since the first connection tube 11 (see FIGS. 1 and 2) to which the resin tube 5 is connected is covered with the sheath tube 71, even if the first connection tube 11 is made of a synthetic resin, the first connection tube 11 is made of synthetic resin. The first connection cylinder portion 11 is not directly subjected to impact, so that impact resistance is improved. Further, since the conversion joint A is not completely buried in the ground, installation work and security inspection such as leak inspection can be easily performed.
【００２０】[0020]
【発明の効果】以上のように、本発明に係る変換継手
は、鞘管によって樹脂管を接続するための合成樹脂製の
第１接続筒部に耐火性や耐衝撃性が付与されるようにな
る。そのため、本発明の変換継手で地表面を横切らせて
ガス配管を施工することが可能になり、そのことによ
り、変換継手の設置工事や漏洩検査を容易に行えるよう
になる。As described above, in the conversion joint according to the present invention, the first connection cylindrical portion made of synthetic resin for connecting the resin tube by the sheath tube is provided with fire resistance and impact resistance. Become. Therefore, it becomes possible to construct a gas pipe by traversing the ground surface with the conversion joint of the present invention, thereby facilitating installation work and leakage inspection of the conversion joint.
【図１】本発明に係る変換継手に金属管を接続した場合
の部分縦断側面図である。FIG. 1 is a partial vertical sectional side view when a metal pipe is connected to a conversion joint according to the present invention.
【図２】図１のＩＩ部の拡大図である。FIG. 2 is an enlarged view of a portion II in FIG.
【図３】本発明に係る変換継手の使用状態説明図であ
る。FIG. 3 is an explanatory view of a use state of the conversion joint according to the present invention.
【図４】比較例による変換継手の部分縦断側面図であ
る。FIG. 4 is a partial longitudinal side view of a conversion joint according to a comparative example.
【図５】比較例による変換継手の使用状態説明図であ
る。FIG. 5 is an explanatory view of a use state of a conversion joint according to a comparative example.
Ａ 変換継手 Ｃ 波付け可撓管（金属管） ５ 樹脂管 １１ 第１接続筒部 １２ 連結筒部 ２１ 第２接続筒部 ２２ 被連結筒部 ７１ 鞘管 ７５ 第１パッキン ８１ 第２パッキン ８２ シール材（防水シール材） Reference Signs List A conversion joint C corrugated flexible tube (metal tube) 5 resin tube 11 first connection tube portion 12 connection tube portion 21 second connection tube portion 22 connected tube portion 71 sheath tube 75 first packing 81 second packing 82 seal Material (waterproof sealing material)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 平林 秀雄 大阪府岸和田市田治米町153番地の１ 日 本鋼管継手株式会社内 (72)発明者 東野 剛年 大阪府岸和田市田治米町153番地の１ 日 本鋼管継手株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideo Hirabayashi 1 day at 153 Tajimecho, Kishiwada, Osaka Prefecture Inside of Nippon Steel Pipe Fitting Co., Ltd. (72) Inventor Takeshi Higashino 1st day at 153 Tajimecho, Kishiwada, Osaka Prefecture Inside this steel pipe fittings Co., Ltd.
Claims (3)
続筒部と、金属管が接続される金属製の第２接続筒部と
を有し、上記第１接続筒部の根元部に具備された合成樹
脂製の連結筒部と上記第２接続筒部の根元部に具備され
た金属製の被連結筒部とが結合されてなる変換継手にお
いて、 上記第１接続筒部の上記連結筒部を覆って耐火性を有す
る鞘管が設けられ、この鞘管の根元部が、上記第２接続
筒部に外嵌合状に挿入されていると共に、この鞘管の根
元部と上記第２接続筒部との間に耐火性の第１パッキン
が、この鞘管の先端部と上記第１接続筒部の上記連結筒
部との間に耐火性の第２パッキンが、それぞれ介在され
ていることを特徴とする変換継手。1. A first connection tube made of synthetic resin to which a resin tube is connected, and a second connection tube made of metal to which a metal tube is connected, and a root portion of the first connection tube. In a conversion joint formed by combining a synthetic resin connecting tubular portion provided at a base and a metal connected tubular portion provided at a root portion of the second connecting tubular portion, the conversion joint of the first connecting tubular portion is provided. A sheath tube having fire resistance is provided so as to cover the connecting tube portion, and a root portion of the sheath tube is inserted into the second connection tube portion so as to be fitted to the outside, and a root portion of the sheath tube is connected to the second connection tube portion. A first fire-resistant packing is interposed between the second connection cylinder and the second fire-resistant packing is interposed between the distal end of the sheath tube and the connection cylinder of the first connection cylinder. A conversion joint characterized in that:
上記連結筒部との間であって、上記第１パッキンの介在
箇所の外側に防水シール材が介在されている請求項１に
記載した変換継手。2. A waterproof sealing material is interposed between a distal end portion of the sheath tube and the connection cylinder portion of the first connection cylinder portion and outside a location where the first packing is interposed. The conversion joint according to 1.
は請求項２に記載した変換継手。3. The conversion joint according to claim 1, wherein the refractory sheath tube is a metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09028398A JP4121181B2 (en) | 1998-04-02 | 1998-04-02 | Conversion fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09028398A JP4121181B2 (en) | 1998-04-02 | 1998-04-02 | Conversion fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11287366A true JPH11287366A (en) | 1999-10-19 |
| JP4121181B2 JP4121181B2 (en) | 2008-07-23 |
Family
ID=13994202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09028398A Expired - Lifetime JP4121181B2 (en) | 1998-04-02 | 1998-04-02 | Conversion fitting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4121181B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351645A (en) * | 2015-12-08 | 2016-02-24 | 四川海搏液压机械有限公司 | Leakage-proof hydraulic pipe ferrule |
-
1998
- 1998-04-02 JP JP09028398A patent/JP4121181B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351645A (en) * | 2015-12-08 | 2016-02-24 | 四川海搏液压机械有限公司 | Leakage-proof hydraulic pipe ferrule |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4121181B2 (en) | 2008-07-23 |
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