JPH0240379Y2 - - Google Patents
Info
- Publication number
- JPH0240379Y2 JPH0240379Y2 JP8379886U JP8379886U JPH0240379Y2 JP H0240379 Y2 JPH0240379 Y2 JP H0240379Y2 JP 8379886 U JP8379886 U JP 8379886U JP 8379886 U JP8379886 U JP 8379886U JP H0240379 Y2 JPH0240379 Y2 JP H0240379Y2
- Authority
- JP
- Japan
- Prior art keywords
- packing
- resin layer
- synthetic resin
- pipe
- female thread
- 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
Links
- 229920003002 synthetic resin Polymers 0.000 claims description 19
- 239000000057 synthetic resin Substances 0.000 claims description 19
- 238000012856 packing Methods 0.000 claims description 18
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 238000005260 corrosion Methods 0.000 claims description 9
- 230000007797 corrosion Effects 0.000 claims description 9
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 210000002310 elbow joint Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、金属管の内周面が合成樹脂層で被覆
されたライニング管との接続に適した防蝕管継手
に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a corrosion-resistant pipe joint suitable for connection to a lined pipe in which the inner peripheral surface of a metal pipe is coated with a synthetic resin layer.
（従来技術およびその問題点）
近年、給水、給湯配管等では赤水の発生を防止
するために、鋼管、鋳鉄管等の内周面を合成樹脂
層で被覆したライニング管が使用されており、こ
のライニング管を接続するための管継手として、
第４図に縦断面図で示した防蝕管継手が提案され
ている。(Prior art and its problems) In recent years, in order to prevent the generation of red water in water supply and hot water supply piping, lining pipes in which the inner peripheral surface of steel pipes, cast iron pipes, etc. are coated with a synthetic resin layer have been used. As a pipe joint for connecting lining pipes,
A corrosion-resistant pipe joint, shown in longitudinal section in FIG. 4, has been proposed.
この管継手は、端部に雌ねじ１１を有する金属
継手１の内周面を前記雌ねじ１１を除いて合成樹
脂層２で被覆し、該合成樹脂層２から筒状部２１
を延出して該筒状部２１と前記雌ねじ１１との間
に所定幅の空隙を設けた構成からなつており、前
記空隙の奥部にパツキング６を装着するか、また
は筒状部２１の外周面に設けた環状溝にＯリング
７を装着していた。 In this pipe joint, the inner peripheral surface of a metal joint 1 having a female thread 11 at the end is covered with a synthetic resin layer 2 except for the female thread 11, and a cylindrical part 21 is formed from the synthetic resin layer 2.
The cylindrical part 21 is extended to provide a gap of a predetermined width between the cylindrical part 21 and the female thread 11, and the packing 6 is attached to the inner part of the gap, or the outer periphery of the cylindrical part 21 is An O-ring 7 was attached to an annular groove provided on the surface.
しかしながら、この管継手に金属管４の内周面
が合成樹脂層５で被覆されたライニング管を接続
した場合に、充分な水密性が確保されないという
問題があつた。 However, when a lining pipe in which the inner circumferential surface of the metal pipe 4 is coated with the synthetic resin layer 5 is connected to this pipe joint, there is a problem in that sufficient watertightness cannot be ensured.
即ち、前者のパツキング６を用いた場合には、
ライニング管の先端部を空隙の奥部まで押込んで
パツキング６を圧縮しないと水密性が確保され
ず、ライニング管の雄ねじ４１と管継手の雌ねじ
１１との螺合が浅い場合には、管内流体の漏洩す
ることがあつた。 That is, when the former packing 6 is used,
Watertightness cannot be ensured unless the tip of the lining pipe is pushed deep into the gap and the packing 6 is compressed, and if the threading between the male thread 41 of the lining pipe and the female thread 11 of the pipe joint is shallow, the fluid in the pipe may There was a leak.
また、後者のＯリング７を用いた場合には、ラ
イニング管の先端部を空隙の奥部まで押込むとき
に環状溝からＯリング７が脱出して空隙の奥部に
移動することがあり、この場合には前者と同様に
充分な水密性が確保されない。尚、環状溝を深く
することによつてＯリング７の脱出を防止できる
が、環状溝がアンダーカツトとなるために環状溝
の成形が困難であるという成形上の問題と、筒状
部２１が肉厚となつて管内面に突出するために管
内流体がスムーズに流れなくなるという構造上の
問題があつた。 Furthermore, when the latter O-ring 7 is used, when the tip of the lining pipe is pushed deep into the gap, the O-ring 7 may escape from the annular groove and move to the deep part of the gap. In this case, as in the former case, sufficient watertightness cannot be ensured. Although it is possible to prevent the O-ring 7 from slipping out by making the annular groove deeper, there are problems in forming the annular groove in that it is difficult to form the annular groove because the annular groove becomes an undercut, and the cylindrical part 21 is difficult to form. There was a structural problem in that the wall became thick and protruded from the inner surface of the tube, making it difficult for the fluid inside the tube to flow smoothly.
（問題を解決するための手段）
本考案は、端部に雌ねじ１１を有する金属継手
１の内周面を前記雌ねじ１１を除いて合成樹脂層
２で被覆し、該合成樹脂層２から筒状部２１を延
出して該筒状部２１と前記雌ねじ１１との間に所
定幅の空隙を設け、前記筒状部２１の外周面に略
円筒状のパツキング３を装着すると共に、該パツ
キング３の一端部内周側に突設した鉤状片３１を
筒状部２１の先端部に係止させたことを特徴とす
るものである。(Means for Solving the Problem) In the present invention, the inner peripheral surface of a metal joint 1 having a female thread 11 at the end is covered with a synthetic resin layer 2 except for the female thread 11, and a cylindrical shape is formed from the synthetic resin layer 2. The section 21 is extended to provide a gap of a predetermined width between the cylindrical section 21 and the female thread 11, and a substantially cylindrical packing 3 is attached to the outer peripheral surface of the cylindrical section 21. It is characterized in that a hook-shaped piece 31 protruding from the inner peripheral side of one end is engaged with the tip of the cylindrical part 21.
以下、本考案の具体的構成を実施例に基づいて
詳細に説明する。 Hereinafter, the specific configuration of the present invention will be explained in detail based on examples.
（実施例）
第１図は本考案の一実施例を示す縦断面図、第
２および３図は本考案で用いられるパツキングの
各実施例を示す縦断面図であつて、図中符号Ａは
防蝕管継手、Ｂはライニング管である。(Example) Fig. 1 is a longitudinal cross-sectional view showing one embodiment of the present invention, and Figs. 2 and 3 are longitudinal cross-sectional views showing each embodiment of packing used in the present invention. Corrosion-resistant pipe joint, B is lining pipe.
金属継手１は、その両端部にテーパ状の雌ねじ
１１を有し、該雌ねじ１１を除く内周面が合成樹
脂層２で被覆されている。そして、合成樹脂層２
の端縁から筒状部２１が延出しており、該筒状部
２１と、前記雌ねじ１１との間には所定幅をもつ
た空隙が設けられている。 The metal joint 1 has a tapered female thread 11 at both ends thereof, and the inner peripheral surface except for the female thread 11 is covered with a synthetic resin layer 2. And synthetic resin layer 2
A cylindrical portion 21 extends from the end edge of the cylindrical portion 21, and a gap having a predetermined width is provided between the cylindrical portion 21 and the female thread 11.
筒状部２１の内周面は、合成樹脂層２の内周面
とほぼ面一となつており、その先端部内面には開
口側に向かつて径が拡大したテーパ面が設けられ
ている。 The inner circumferential surface of the cylindrical portion 21 is substantially flush with the inner circumferential surface of the synthetic resin layer 2, and a tapered surface whose diameter increases toward the opening side is provided on the inner surface of the distal end thereof.
一方、筒状部２１の外周面は、ライニング管Ｂ
の内径とほぼ等しいか、若干小径に形成されてお
り、該筒状部２１の外周面にはパツキング３が装
着されている。本考案で用いられるパツキング３
は、第２および３図に例示した如く略円筒状をな
しており、その一端部には内周側に突出した鉤状
片３１が設けられている。この鉤状片３１は筒状
部２１の先端部と係合して空隙の奥部にパツキン
グ３が移動するのを阻止するものである。パツキ
ング３の外周面には、必要に応じて第３図に示し
たような環状突起３３を設けてもよく、その他端
部にはライニング管Ｂの先端部が当接する鍔３２
を設けおくとよい。 On the other hand, the outer peripheral surface of the cylindrical portion 21 is
The inner diameter of the cylindrical portion 21 is approximately equal to or slightly smaller than the inner diameter of the cylindrical portion 21, and a packing 3 is attached to the outer peripheral surface of the cylindrical portion 21. Packing 3 used in this invention
As illustrated in FIGS. 2 and 3, it has a substantially cylindrical shape, and a hook-shaped piece 31 protruding toward the inner circumference is provided at one end thereof. This hook-shaped piece 31 engages with the tip of the cylindrical portion 21 and prevents the packing 3 from moving to the inner part of the gap. If necessary, an annular projection 33 as shown in FIG. 3 may be provided on the outer peripheral surface of the packing 3, and a collar 32 on the other end against which the tip of the lining pipe B comes into contact.
It is a good idea to set up
本考案の防蝕管継手Ａは以上の構成からなるも
のであつて、次にこの管継手Ａにライニング管Ｂ
を接続する手順を説明する。 The corrosion-resistant pipe fitting A of the present invention has the above-mentioned configuration, and next, the lining pipe B is added to the pipe fitting A.
Explain the procedure for connecting.
ライニング管Ｂは、鋼管、鋳鉄管等の金属管４
の内周面を塩化ビル樹脂、ポリエチレン樹脂等の
合成樹脂層５で被覆したものであり、まず第１図
の左側に示す如くその先端部にテーパ状の雄ねじ
４１を設ける。そこで、同図の右側に示す如く、
雄ねじ４１を管継手Ａの雌ねじ１１にねじ込み、
ライニング管Ｂの先端部を空隙の奥部に押込む。
この接続操作によつて、管継手Ａの筒状部２１の
外周面に装着しておいたパツキング３がライニン
グ管Ｂの内周面と圧接して水密性が確保される。 Lining pipe B is a metal pipe 4 such as steel pipe or cast iron pipe.
The inner circumferential surface of the resin is coated with a synthetic resin layer 5 such as vinyl chloride resin or polyethylene resin, and a tapered male screw 41 is first provided at the tip thereof as shown on the left side of FIG. Therefore, as shown on the right side of the figure,
Screw the male thread 41 into the female thread 11 of the pipe fitting A,
Push the tip of the lining tube B deep into the gap.
By this connection operation, the packing 3 attached to the outer peripheral surface of the cylindrical portion 21 of the pipe joint A comes into pressure contact with the inner peripheral surface of the lining pipe B, thereby ensuring watertightness.
尚、本考案の一実施例を示す第１図には、金属
継手１としてソケツト継手を用いたものを例示し
たが、本考案はこのソケツト継手以外にもエルボ
継手、Ｔ継手、管端キヤツプその他適宜の金属継
手に適用可能である。また、合成樹脂層２として
は、塩化ビニル樹脂、ポリエチレン樹脂その他適
宜の熱可塑性合成樹脂が使用できる。 Although FIG. 1 showing an embodiment of the present invention uses a socket joint as the metal joint 1, the present invention is also applicable to elbow joints, T-joints, pipe end caps, etc. Applicable to appropriate metal joints. Further, as the synthetic resin layer 2, vinyl chloride resin, polyethylene resin, and other appropriate thermoplastic synthetic resins can be used.
（考案の作用および効果）
本考案の防蝕管継手は、金属継手の内周面を合
成樹脂層で被覆し、該合成樹脂層から延出した筒
状部の外周面に略円筒状のパツキングを装着した
ものであり、該パツキングに突設した鉤状片を筒
状部の先端部に係止させたので、ライニング管を
螺合接続する際にもパツキングが空隙の奥部に移
動することがなく、ライニング管の先端部内周面
と筒状部との間にパツキングが緊密に当接して水
密性が確実に確保される。(Operations and Effects of the Invention) The corrosion-resistant pipe joint of the present invention covers the inner peripheral surface of the metal joint with a synthetic resin layer, and has approximately cylindrical packing on the outer peripheral surface of the cylindrical portion extending from the synthetic resin layer. Since the hook-shaped piece protruding from the packing is locked to the tip of the cylindrical part, the packing does not move to the back of the gap when the lining pipe is screwed into the pipe. Instead, the packing comes into close contact between the inner circumferential surface of the tip end of the lining pipe and the cylindrical part, ensuring watertightness.
第１図は本考案の一実施例を示す防蝕管継手の
縦断面図、第２図および第３図は本考案で用いら
れるパツキングの各実施例を示す縦断面図、第４
図は従来の防蝕管継手を示す縦断面図である。
Ａ……防蝕管継手、Ｂ……ライニング管、１…
…金属継手、１１……雌ねじ、２……合成樹脂
層、２１……筒状部、３……パツキング、３１…
…鉤状片、４……金属管、５……合成樹脂層。
FIG. 1 is a longitudinal cross-sectional view of a corrosion-resistant pipe joint showing one embodiment of the present invention, FIGS. 2 and 3 are longitudinal cross-sectional views showing each embodiment of packing used in the present invention, and FIG.
The figure is a longitudinal sectional view showing a conventional corrosion-resistant pipe joint. A...Corrosion-resistant pipe joint, B...Lining pipe, 1...
... Metal joint, 11 ... Female thread, 2 ... Synthetic resin layer, 21 ... Cylindrical part, 3 ... Packing, 31 ...
...Hook-shaped piece, 4...Metal tube, 5...Synthetic resin layer.
Claims (1)
を前記雌ねじ１１を除いて合成樹脂層２で被覆
し、合成樹脂層２から筒状部２１を延出して該筒
状部２１と前記雌ねじ１１との間に所定幅の空隙
を設けた防蝕管継手において、前記筒状部２１の
外周面に略円筒状のパツキング３を装着すると共
に、該パツキング３の一端部内周側に突設した鉤
状片３１を筒状部２１の先端部に係止させたこと
を特徴とする防蝕管継手。 The inner circumferential surface of a metal joint 1 having a female thread 11 at the end is covered with a synthetic resin layer 2 except for the female thread 11, and a cylindrical part 21 is extended from the synthetic resin layer 2 to connect the cylindrical part 21 and the female thread. 11, a generally cylindrical packing 3 is attached to the outer peripheral surface of the cylindrical part 21, and a hook protrudes from the inner circumferential side of one end of the packing 3. A corrosion-resistant pipe joint characterized in that a shaped piece 31 is locked to the tip of a cylindrical part 21.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8379886U JPH0240379Y2 (en) | 1986-06-02 | 1986-06-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8379886U JPH0240379Y2 (en) | 1986-06-02 | 1986-06-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62194988U JPS62194988U (en) | 1987-12-11 |
| JPH0240379Y2 true JPH0240379Y2 (en) | 1990-10-29 |
Family
ID=30937714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8379886U Expired JPH0240379Y2 (en) | 1986-06-02 | 1986-06-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0240379Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0710150Y2 (en) * | 1989-03-14 | 1995-03-08 | 日立金属株式会社 | Anticorrosion pipe fittings |
-
1986
- 1986-06-02 JP JP8379886U patent/JPH0240379Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62194988U (en) | 1987-12-11 |
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