JPH08219339A - Outside surface resin coated joint and packing therefor - Google Patents
Outside surface resin coated joint and packing thereforInfo
- Publication number
- JPH08219339A JPH08219339A JP2018795A JP2018795A JPH08219339A JP H08219339 A JPH08219339 A JP H08219339A JP 2018795 A JP2018795 A JP 2018795A JP 2018795 A JP2018795 A JP 2018795A JP H08219339 A JPH08219339 A JP H08219339A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- joint body
- resin
- packing
- peripheral surface
- 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
Links
Landscapes
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、接続部における外部か
らの腐食を完全に防止する管継手に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint which completely prevents external corrosion at a connecting portion.
【０００２】[0002]
【従来の技術】従来、図３、図４に示す管継手がある。
図３に示すものは継手本体１の被覆層３の筒状部の内面
に帯状の軟質シール材９を装着したものであり、図４に
示すものは外面樹脂被覆管２の樹脂被覆層７の端部にお
けるおねじ５のねじ切り上がり部外周にＯリングパッキ
ン１０を装着したものである。2. Description of the Related Art Conventionally, there is a pipe joint shown in FIGS.
What is shown in FIG. 3 is one in which a band-shaped soft sealing material 9 is attached to the inner surface of the tubular portion of the coating layer 3 of the joint body 1, and what is shown in FIG. 4 is that of the resin coating layer 7 of the outer surface resin coating pipe 2. The O-ring packing 10 is attached to the outer circumference of the threaded up portion of the male screw 5 at the end.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の管継手の内
前者のものでは、継手本体１と外面樹脂被覆管２との締
め込みトルクが大きくなったり、また締め込み程度のバ
ラツキが大きくなる欠点があった。また後者の管継手で
は、外面樹脂被覆管２の端部の形状やおねじ寸法のバラ
ツキ等によって密封性能にバラツキが生じ確実にシール
できない問題点があった。本発明は従来の欠点を解消す
るものであり、簡単な形状のパッキンを用いることによ
り密封シールが確実に行われ、しかも接続作業の個人差
や管にネジ切りするおねじの寸法による密封性能のバラ
ツキを軽減し、防食不良や接続不良を未然に防止すると
共に作業性を向上した継手及びパッキンを提供するもの
である。In the former one of the above-mentioned conventional pipe joints, the tightening torque between the joint body 1 and the outer surface resin-coated pipe 2 becomes large, and the variation in the degree of tightening becomes large. was there. Further, in the latter pipe joint, there is a problem in that the sealing performance varies due to variations in the shape of the end portion of the outer surface resin-coated pipe 2 and the external thread size, etc., so that reliable sealing cannot be achieved. The present invention solves the drawbacks of the prior art, by using a packing having a simple shape to ensure a hermetic seal, and further, the sealing performance depends on individual differences in connection work and the size of a male thread to be cut into a pipe. It is intended to provide a joint and packing that reduce variations and prevent corrosion prevention and connection failure, and improve workability.
【０００４】[0004]
【課題を解決するための手段】本発明の要旨は、金属製
継手本体の外表面を樹脂層で被覆すると共に継手本体の
端部から突出して筒状部を形成し、継手本体のめねじに
螺着するおねじを有する外面樹脂被覆管の外周面と前記
筒状部の内周面との間にパッキン収容空間を形成し、こ
のパッキン収容空間に、管のおねじ切り終わり部の樹脂
被覆層に係止する樹脂製の環状部材と一体で前記管の外
周面に接するとともに前記筒状部の内周面に接する外面
リップ部と管を継手本体に螺着した状態で前記筒状部の
端部から突出する突出端部とを設けた弾性パッキンを装
着したことを特徴とする外面樹脂被覆継手である。The gist of the present invention is to cover the outer surface of a metal joint body with a resin layer and to project from the end of the joint body to form a tubular portion, and to form a female thread of the joint body. A packing accommodating space is formed between the outer peripheral surface of the outer surface resin-coated tube having a male screw to be screwed and the inner peripheral surface of the tubular portion, and the resin coating layer at the external threading end portion of the tube is formed in the packing accommodating space. The end of the tubular portion is screwed to the joint body with the outer surface lip portion that is in contact with the outer peripheral surface of the pipe and is in contact with the inner peripheral surface of the tubular portion integrally with the annular member made of resin that is locked to The outer surface resin-coated joint is characterized in that an elastic packing provided with a projecting end portion projecting from the portion is mounted.
【０００５】更に、金属製継手本体の外表面を樹脂層で
被覆すると共に継手本体の端部から突出する筒状部を有
した外面樹脂被覆継手と該継手のめねじに螺着するおね
じを有する外面樹脂被覆管に装着するパッキンであっ
て、前記管のおねじの切り終わり部の樹脂被覆層に係止
する樹脂製の環状部材と一体で形成した弾性材料からな
る前記管の外周面に接するとともに前記筒状部の内周面
に接する外面リップ部と前記継手本体と管が螺着した状
態で筒状部の端部から突出する突出端部とを有すること
を特徴とする外面樹脂被覆継手用パッキンである。Further, an outer surface resin-coated joint having a cylindrical portion projecting from an end of the joint body and an external thread for screwing the female thread of the joint is formed by coating the outer surface of the metal joint body with a resin layer. A packing to be attached to the outer surface resin-coated tube, which has an outer peripheral surface of the tube made of an elastic material integrally formed with an annular member made of a resin that engages with the resin coating layer at the end of the thread cutting of the male thread of the tube. An outer surface resin coating, which has an outer surface lip portion that is in contact with and is in contact with an inner peripheral surface of the tubular portion, and a projecting end portion that projects from an end portion of the tubular portion in a state where the joint body and the pipe are screwed together. It is a packing for joints.
【０００６】[0006]
【作用】本発明は上記の構成であって、外面樹脂被覆管
を外面樹脂被覆継手に接続すると、パッキンの樹脂製の
環状部が管のおねじ切り終わり部の樹脂被覆層に係止し
てパッキンの内面が管の外周面に接すると共に、筒状部
内周面のパッキン収容空間内に収容され外面リップ部が
筒状部の内周面に接する。また管のおねじ寸法が正しく
ネジ切りされた管では接続した状態でパッキンの突出端
部が筒状部の端部から突出して正しい接続状態であるこ
とを確認できる。従ってパッキンの突出端部が筒状部の
端部から出ていない場合は管のおねじが規定寸法より小
さく、接続不良であると判断できる。またパッキンの突
出端部が筒状部の端部から出過ぎてパッキンの外面リッ
プ部が出ていると管の締め付け程度が不足しているかあ
るいは管のおねじが規定寸法より大きく、接続不良であ
ると判断できる。According to the present invention having the above-mentioned structure, when the outer surface resin-coated pipe is connected to the outer surface resin-coated joint, the resin annular portion of the packing is locked to the resin-coated layer at the external threading end portion of the pipe to seal the packing. The inner surface of the pipe contacts the outer peripheral surface of the tube, and the outer surface lip portion is housed in the packing housing space of the inner peripheral surface of the tubular portion and contacts the inner peripheral surface of the tubular portion. Further, in a pipe in which the male thread size of the pipe is properly threaded, it is possible to confirm that the protruding end of the packing protrudes from the end of the tubular portion in a connected state and is in a correct connected state. Therefore, when the protruding end of the packing does not extend from the end of the tubular portion, the male thread of the pipe is smaller than the specified dimension, and it can be determined that the connection is defective. If the protruding end of the packing extends beyond the end of the tubular part and the outer lip of the packing comes out, the degree of tightening of the pipe is insufficient, or the male thread of the pipe is larger than the specified dimension and the connection is poor. Can be judged.
【０００７】[0007]
【実施例】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を示す接続前と接続後の部
分断面図で、金属製の継手本体１１は端部内面に外面樹
脂被覆管接続用のめねじ１２を形成してあり、外表面に
は合成樹脂被覆層１３を被覆してある。この合成樹脂被
覆層１３の外端部は継手本体１１の端部から突出する筒
状部１４となっており、筒状部１４の内周面は端部に向
かって広がるテーパ内面となっている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view showing an embodiment of the present invention before and after connection, in which a metallic joint body 11 has an internal thread 12 for connecting an outer surface resin-coated pipe formed on an inner surface of an end thereof. The surface is covered with a synthetic resin coating layer 13. The outer end of the synthetic resin coating layer 13 is a tubular portion 14 protruding from the end of the joint body 11, and the inner peripheral surface of the tubular portion 14 is a tapered inner surface that widens toward the end. .
【０００８】１５は外面樹脂被覆管で、端部に継手本体
のめねじ１２に螺着するおねじ１６を有し、外表面に樹
脂被覆層１７を有する。この外面樹脂被覆管１５を継手
本体１１に接続すると、管１５の外面樹脂被覆層１７は
継手本体１１の筒状部１４と必ず重なるように筒状部１
４の長さを設けてあり、筒状部１４の内周面と管１５の
外周面との間でパッキン収容空間１８を形成している。Reference numeral 15 denotes an outer surface resin-coated pipe, which has an external thread 16 screwed to the internal thread 12 of the joint body at its end and a resin coating layer 17 on the outer surface. When this outer surface resin-coated pipe 15 is connected to the joint body 11, the outer surface resin-coated layer 17 of the pipe 15 must be overlapped with the tubular portion 14 of the joint body 11 so that the tubular portion 1
4 is provided, and a packing accommodating space 18 is formed between the inner peripheral surface of the tubular portion 14 and the outer peripheral surface of the tube 15.
【０００９】このパッキン収容空間１８内には弾性パッ
キン１９が装着される。図に示すようにパッキン１９
は、管１５のおねじ切り終わりの外面樹脂被覆層１７に
係止する合成樹脂製の環状部材２０と一体になったゴム
製で、外周面に筒状体１４の内面とシールする外側リッ
プ部２１と内周面に管１５の外周面とシールする内側リ
ップ部を有し、外側リップ部２１の端部に外面が平行な
突出端部２３を形成した略筒状のパッキンである。An elastic packing 19 is mounted in the packing accommodating space 18. Packing 19 as shown
Is made of rubber integrated with an annular member 20 made of synthetic resin, which is engaged with the outer resin coating layer 17 at the end of thread cutting of the pipe 15, and has an outer lip portion 21 for sealing the outer surface with the inner surface of the tubular body 14. Is a substantially cylindrical packing having an inner lip portion that seals with the outer circumferential surface of the pipe 15 on the inner circumferential surface, and a protruding end portion 23 whose outer surface is parallel to the outer lip portion 21 is formed at the end portion of the outer lip portion 21.
【００１０】図１の右側断面図で示すごとく、予め端部
におねじ１６を形成した外面樹脂被覆管１５に弾性パッ
キン１９を装着し、環状部材２０を管１５の外面樹脂被
覆層１７に係止してある。このパッキン１９が装着され
た管１５を継手本体１１にねじ込み接続すると図１の左
側断面図で示すごとくになる。正常な管１５のおねじ１
６を形成して正常な継手本体とのねじ込みトルクでもっ
てねじ込み接続が行われた状態で、パッキン１９の外側
リップ部２１は筒状部１４内に納まって筒状部の内周面
と確実にシールするように筒状部１４の長さとパッキン
１９の外側リップ部２１を設けてあり、またパッキン１
９の突出端部２３は必ず筒状部１４の端部から突き出る
ように突出部２３の長さを設けてある。この筒状部１４
に対するパッキン１９の寸法は、管１５が正常な規定寸
法公差内にある正規のおねじ寸法で、正常な締め付け力
で螺着接続された場合は必ず上記の関係になるように設
けられている。As shown in the right side sectional view of FIG. 1, an elastic packing 19 is attached to an outer surface resin coating pipe 15 having a thread 16 formed on an end portion in advance, and an annular member 20 is attached to the outer surface resin coating layer 17 of the pipe 15. It has stopped. When the pipe 15 having the packing 19 attached thereto is screwed into the joint main body 11 and connected, the pipe 15 becomes as shown in the left sectional view of FIG. Male thread 1 of normal tube 15
In the state in which 6 is formed and the screw-in connection is performed with a normal screw-in torque with the joint main body, the outer lip portion 21 of the packing 19 is housed in the tubular portion 14 and securely joined to the inner peripheral surface of the tubular portion. The length of the tubular portion 14 and the outer lip portion 21 of the packing 19 are provided so as to seal, and the packing 1
The projecting end portion 23 of 9 is provided with the length of the projecting portion 23 so as to always project from the end portion of the tubular portion 14. This tubular portion 14
The size of the packing 19 with respect to is a regular external thread size within which the pipe 15 is within the normal specified dimensional tolerance, and is provided so as to always satisfy the above relationship when the pipe 15 is screwed and connected with a normal tightening force.
【００１１】ここで継手本体の筒状部とパッキン寸法の
求め方について設計の考え方を記すと、図２において、
継手本体１１に外面樹脂被覆管１５を螺着した継手本体
１１の端部から管１５の樹脂被覆層１７の切り上がり部
までの距離Ｌは、Ｐ＝ねじのピッチ、Ａ＝管の全ねじ山
数、Ｂ＝おねじの規準径の位置、Ｃ＝おねじとめねじの
公差の和、Ｄ＝レンチ代山数、Ｆ＝管のおねじ切上がり
部から樹脂層切上がり部までの距離、とするとＬ＝Ａ×
Ｐ−Ｂ＋Ｃ−Ｄ×Ｐ＋Ｆの式が成り立つ。このＬ寸法に
管の樹脂被覆層との重なり代を加えた長さが継手本体の
筒状部１４の長さＭになり、筒状部１４の長さＭが決ま
るとパッキン１９の環状部材２０から外側リップ部２１
までの距離が決まる。また突出部２３の長さはＣ寸法を
加味して決定される。Here, the design concept of how to obtain the cylindrical portion of the joint body and the packing size will be described with reference to FIG.
The distance L from the end of the joint body 11 where the outer surface resin-coated pipe 15 is screwed to the joint body 11 to the cut-up portion of the resin coating layer 17 of the pipe 15 is P = thread pitch, A = total thread of the pipe Number, B = position of the standard diameter of male thread, C = sum of tolerance of male thread and female thread, D = number of wrench allowance, F = distance from threaded thread up to resin layer threaded up section of pipe L = A ×
The formula of P−B + C−D × P + F is established. The length of this L dimension plus the overlap margin with the resin coating layer of the pipe becomes the length M of the tubular portion 14 of the joint body. When the length M of the tubular portion 14 is determined, the annular member 20 of the packing 19 is determined. To outer lip 21
The distance to is decided. The length of the protruding portion 23 is determined in consideration of the C dimension.
【００１２】[0012]
【発明の効果】以上のごとく本発明によれば、接続する
管に正しいおねじを形成して正常なねじ込みトルクでね
じ締め付けされた場合、継手本体の筒状部の端部からパ
ッキンの突出部が突出して接続が行われ、パッキンが確
実に防食シールして正常な接続が行われていることを確
認できる。またパッキンの突出部が確認出来なかった
り、あるいはパッキンの外側リップ部が見えたりする場
合は接続状態が不良であることが容易に判り、この場合
は接続作業を再度やり直して正しい接続を行うことがで
きる。As described above, according to the present invention, when a correct male screw is formed on a pipe to be connected and the screw is tightened with a normal screwing torque, a protruding portion of the packing from the end portion of the tubular portion of the joint body. It can be confirmed that the connection is made by projecting and the packing is surely sealed by the anti-corrosion seal to make a normal connection. If you cannot see the protruding part of the packing, or if you can see the outer lip of the packing, you can easily find that the connection condition is bad.In this case, you can repeat the connection work and make a correct connection. it can.
【図１】 本発明の実施例を示す接続前と接続後の部分
断面図である。FIG. 1 is a partial cross-sectional view before and after connection showing an embodiment of the present invention.
【図２】 本発明実施例のパッキン寸法設計を示す接続
部分断面図である。FIG. 2 is a sectional view of a connecting portion showing the packing dimension design of the embodiment of the present invention.
【図３】 従来技術を示す接続部の部分断面図である。FIG. 3 is a partial cross-sectional view of a connection portion showing a conventional technique.
【図４】 従来技術を示す接続部の部分断面図である。FIG. 4 is a partial cross-sectional view of a connection portion showing a conventional technique.
１１ 継手本体 １２ めねじ １３ 合成樹脂被覆層 １４ 筒状部 １５ 外面樹脂被覆管 １６ おねじ １７ 外面樹脂被覆層 １８ パッキ
ン収容空間 １９ パッキン ２０ 環状部
材 ２１ 外側リップ部 ２２ 内側リ
ップ部 ２３ 突出部11 Joint Main Body 12 Female Thread 13 Synthetic Resin Coating Layer 14 Cylindrical Part 15 External Resin Coating Pipe 16 Male Thread 17 External Resin Coating Layer 18 Packing Storage Space 19 Packing 20 Annular Member 21 Outer Lip Part 22 Inner Lip Part 23 Projecting Part
Claims (2)
すると共に継手本体の端部から突出して筒状部を形成
し、継手本体のめねじに螺着するおねじを有する外面樹
脂被覆管の外周面と前記筒状部の内周面との間にパッキ
ン収容空間を形成し、このパッキン収容空間に、管のお
ねじ切り終わり部の樹脂被覆層に係止する樹脂製の環状
部材と一体で前記管の外周面に接するとともに前記筒状
部の内周面に接する外面リップ部と管を継手本体に螺着
した状態で前記筒状部の端部から突出する突出端部とを
設けた弾性パッキンを装着したことを特徴とする外面樹
脂被覆継手。1. An outer resin coating having a metal joint body outer surface coated with a resin layer, protruding from an end portion of the joint body to form a tubular portion, and having an external thread screwed into a female thread of the coupling body. A packing accommodating space is formed between the outer peripheral surface of the pipe and the inner peripheral surface of the tubular portion, and in this packing accommodating space, a resin annular member that is locked to the resin coating layer at the external threading end of the pipe, An outer surface lip portion that is in contact with the outer peripheral surface of the pipe and is in contact with the inner peripheral surface of the tubular portion and a projecting end portion that projects from the end portion of the tubular portion in a state where the pipe is screwed to the joint body are provided. An outer surface resin-coated joint characterized in that an elastic packing is attached.
すると共に継手本体の端部から突出する筒状部を有した
外面樹脂被覆継手と該継手のめねじに螺着するおねじを
有する外面樹脂被覆管に装着するパッキンであって、 前記管のおねじの切り終わり部の樹脂被覆層に係止する
樹脂製の環状部材と一体で形成した弾性材料からなる前
記管の外周面に接するとともに前記筒状部の内周面に接
する外面リップ部と前記継手本体と管が螺着した状態で
筒状部の端部から突出する突出端部とを有することを特
徴とする外面樹脂被覆継手用パッキン。2. An outer surface resin-coated joint having a cylindrical portion projecting from an end of the joint body and an outer thread for screwing the female thread of the joint body, the outer surface of the metal joint body being covered with a resin layer. A packing to be attached to the outer surface resin-coated pipe, which has an outer peripheral surface of the pipe made of an elastic material integrally formed with an annular member made of a resin that engages with the resin coating layer at the end of the thread cutting of the male thread of the pipe. An outer surface resin coating, which has an outer surface lip portion that is in contact with and is in contact with an inner peripheral surface of the tubular portion, and a projecting end portion that projects from an end portion of the tubular portion in a state where the joint body and the pipe are screwed together. Packing for fittings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018795A JPH08219339A (en) | 1995-02-08 | 1995-02-08 | Outside surface resin coated joint and packing therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018795A JPH08219339A (en) | 1995-02-08 | 1995-02-08 | Outside surface resin coated joint and packing therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08219339A true JPH08219339A (en) | 1996-08-30 |
Family
ID=12020182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2018795A Pending JPH08219339A (en) | 1995-02-08 | 1995-02-08 | Outside surface resin coated joint and packing therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08219339A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6761379B1 (en) | 2001-10-22 | 2004-07-13 | The Hong Kong And China Gas Company Limited | Pipe fittings |
| JP2008253891A (en) * | 2007-04-03 | 2008-10-23 | Takuma Co Ltd | Nozzle device |
-
1995
- 1995-02-08 JP JP2018795A patent/JPH08219339A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6761379B1 (en) | 2001-10-22 | 2004-07-13 | The Hong Kong And China Gas Company Limited | Pipe fittings |
| JP2008253891A (en) * | 2007-04-03 | 2008-10-23 | Takuma Co Ltd | Nozzle device |
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