JPH039197A - Joint for anticorrosive pipe - Google Patents
Joint for anticorrosive pipeInfo
- Publication number
- JPH039197A JPH039197A JP13992789A JP13992789A JPH039197A JP H039197 A JPH039197 A JP H039197A JP 13992789 A JP13992789 A JP 13992789A JP 13992789 A JP13992789 A JP 13992789A JP H039197 A JPH039197 A JP H039197A
- Authority
- JP
- Japan
- Prior art keywords
- corrosion
- resistant
- pipe
- joint
- synthetic resin
- 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
- 239000002184 metal Substances 0.000 claims abstract description 37
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 25
- 239000000057 synthetic resin Substances 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 230000007797 corrosion Effects 0.000 claims description 69
- 238000005260 corrosion Methods 0.000 claims description 69
- 229920005989 resin Polymers 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 14
- 238000007789 sealing Methods 0.000 description 9
- XUMBMVFBXHLACL-UHFFFAOYSA-N Melanin Chemical compound O=C1C(=O)C(C2=CNC3=C(C(C(=O)C4=C32)=O)C)=C2C4=CNC2=C1C XUMBMVFBXHLACL-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は防蝕管の継手に関する。更に詳しくは、金属管
の外周面に合成樹脂層を設けた防１！！ｌ！管の端部を
、金属短管の外周面に合成樹脂層を設けた防蝕継手にね
じ込み、更に筒状継手部材を使用して防蝕管を接続する
防蝕管の継手に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a corrosion-resistant pipe joint. For more details, please refer to the Prevention 1!, which has a synthetic resin layer on the outer circumferential surface of the metal tube! ! l! The present invention relates to a corrosion-resistant pipe joint in which the end of the pipe is screwed into a corrosion-resistant joint having a synthetic resin layer provided on the outer peripheral surface of a short metal pipe, and the corrosion-resistant pipe is connected using a cylindrical joint member.
従来、金属管の外周面に合成樹脂層を設けた防蝕管を接
続する継手としては、内面にねじを有する金属ソケット
と該金属ソケットの外周全面を被覆しかつ端部に拡大径
部を有する合成樹脂管体とよりなる継手本体と、該拡大
径部の外周面に嵌着して内方に折曲しその先端が拡大径
部の奥側に屈曲したリップ状の閉塞部を有する筒状バッ
キングと、管端部に雄ねじを設けた合成樹脂被覆金属管
とから構成され、該被覆金属管の雄ねじを継手本体のね
じにねじ込み接合して筒状パー２キングの閉塞部を合成
樹脂被覆層の外周面に密着させ、かつ閉塞部先端と拡大
径部内周との間に間隙を形成したものが、提供されてい
る（実公昭５７−５９７４７号公報参照）。Conventionally, joints for connecting corrosion-resistant pipes with a synthetic resin layer on the outer circumferential surface of the metal tube have been made of a metal socket with a thread on the inner surface and a synthetic resin socket that covers the entire outer circumference of the metal socket and has an enlarged diameter portion at the end. A cylindrical backing having a joint body made of a resin tube, and a lip-shaped closing part that fits on the outer circumferential surface of the enlarged diameter part and is bent inward, and whose tip is bent toward the back of the enlarged diameter part. and a synthetic resin-coated metal tube with a male thread at the end, and the male thread of the coated metal tube is screwed into the thread of the fitting body to connect the closed part of the cylindrical parker to the synthetic resin coating layer. There has been provided one in which the plug is brought into close contact with the outer peripheral surface and a gap is formed between the end of the closed part and the inner periphery of the enlarged diameter part (see Japanese Utility Model Publication No. 57-59747).
上記従来の防蝕管継手は、接続された合成樹脂被覆金属
管の偏心や曲がりを許容できるという点においては、極
めて優れた構造を有するものであが、環状バッキングの
閉塞部の弾性力でシールし、しかも、そのシール面が線
状であるために、長期的なシール性、継手本体の金属ソ
ケット及び合成樹脂被覆金属管の管端部の腐食防止に難
点があった。The above-mentioned conventional corrosion-resistant pipe joints have an extremely superior structure in that they can tolerate eccentricity and bending of the connected synthetic resin-coated metal pipes, but they cannot be sealed by the elastic force of the closed part of the annular backing. Furthermore, since the sealing surface is linear, there are problems in long-term sealing performance and in preventing corrosion of the metal socket of the joint body and the end of the synthetic resin-coated metal tube.
本発明は、上述のような従来継手の欠点を解消したもの
であり、防蝕管の管端部に設けた雄ねじを防蝕継手の雌
ねじにねじ込んで接合し、更に、筒状継手部材を防蝕継
手に螺着すると共に、その内筒を防蝕管と防蝕継手の間
に圧挿することによって、長期的なシール性に富み、接
続部分を完全に防蝕することができる防蝕管の継手を提
供するものである。The present invention solves the above-mentioned drawbacks of conventional joints, and connects the male thread provided at the end of the corrosion-resistant pipe by screwing into the female thread of the corrosion-resistant joint, and furthermore, connects the cylindrical joint member to the corrosion-resistant joint. This provides a corrosion-resistant pipe joint that has excellent long-term sealing properties and can completely protect the connecting part from corrosion by screwing the joint and press-fitting the inner cylinder between the corrosion-resistant pipe and the corrosion-resistant joint. be.
本発明に係る防蝕管の継手は、管端部に雄ねじ２を有す
る金属管１の外周面に合成樹脂層２を設けた防蝕管Ａと
、内周面に雌ねじ５を有する金属短管４の外周全体を合
成樹脂層６で被覆し、該合成樹脂層６の端部を金属短管
４の端面より延出し被覆部８を形成して、その外周面に
雄ねじ７を設けると共に、該被覆部８の内周面を金属短
管４の端面より拡径してある防蝕継手Ｂと、内周面に雌
ねじ１０を有する外筒９の内側に、外筒９より間隔をも
って内筒１１を設けた筒状継手部材Ｃとからなっている
。上記防蝕管Ａの雄ねじ２を防蝕継手Ｂの雌ねじ５にね
じ込んで防蝕管Ａを接合してある。また、筒状継手部材
Ｃの雌ねじ１０を防蝕継手Ｂの雄ねじ７に螺着すると共
に、筒状継手部材Ｃの内筒１１を防蝕管Ａの外周面と防
蝕継手Ｂの被覆部８の内周面との間隙に圧接挿入してあ
ることを特徴としている。The corrosion-resistant pipe joint according to the present invention consists of a corrosion-resistant pipe A in which a synthetic resin layer 2 is provided on the outer circumferential surface of a metal tube 1 having a male thread 2 at the tube end, and a short metal tube 4 having a female thread 5 on the inner circumferential surface. The entire outer periphery is covered with a synthetic resin layer 6, the end of the synthetic resin layer 6 extends from the end surface of the short metal tube 4 to form a covering part 8, and a male thread 7 is provided on the outer peripheral surface of the covering part 8. An inner cylinder 11 is provided at a distance from the outer cylinder 9 on the inside of a corrosion-resistant joint B whose inner peripheral surface of 8 is larger in diameter than the end face of the short metal pipe 4, and an outer cylinder 9 having a female thread 10 on the inner peripheral surface. It consists of a cylindrical joint member C. The male thread 2 of the corrosion resistant pipe A is screwed into the female thread 5 of the corrosion resistant joint B to connect the corrosion resistant pipe A. Further, the female thread 10 of the cylindrical joint member C is screwed onto the male thread 7 of the corrosion-resistant joint B, and the inner cylinder 11 of the cylindrical joint member C is connected to the outer peripheral surface of the corrosion-resistant pipe A and the inner periphery of the coating portion 8 of the corrosion-resistant joint B. It is characterized by being inserted into the gap with the surface under pressure.
本発明において防蝕管は防蝕継手にねじ込まれているか
らそれが抜出ることがなく、ねじ込まれた防蝕管と拡径
された防蝕継手の被覆部との間に間隙が形成される。こ
の間隙に圧挿された筒状継手部材の内筒が防蝕管の外面
と被覆部の内面とに面接触するために完全にシールされ
る。また、防蝕継手に螺着しだ外筒により接続部分が被
覆されてシール性が助長されると共に、この筒状継手部
材を介して防蝕管と防蝕継手とが一体になるので、上記
シール性が長期に亘り持続する。In the present invention, since the corrosion-resistant tube is screwed into the corrosion-resistant joint, it cannot be pulled out, and a gap is formed between the screwed-in corrosion-resistant tube and the expanded diameter coating of the corrosion-resistant joint. The inner cylinder of the cylindrical joint member press-fitted into this gap comes into surface contact with the outer surface of the corrosion-resistant tube and the inner surface of the covering part, so that it is completely sealed. In addition, the connection part is covered by the outer tube screwed onto the corrosion-resistant joint, which promotes sealing performance, and since the corrosion-resistant pipe and the corrosion-resistant joint are integrated through this cylindrical joint member, the above-mentioned sealing performance is improved. Lasts for a long time.
次に本発明の実施例を添附の図面において詳述する。 Embodiments of the invention will now be described in detail with reference to the accompanying drawings.
第１図は一部分を切除した分解斜視図、第２図は防蝕管
の接続要領を示す断面図、第３図（イ）（ロ）は別の実
施例を示す筒状継手部材の断面図である。Fig. 1 is an exploded perspective view with a portion cut away, Fig. 2 is a cross-sectional view showing how to connect a corrosion-resistant pipe, and Fig. 3 (a) and (b) are cross-sectional views of a cylindrical joint member showing another embodiment. be.
本発明は、第１図に示す如く、防蝕管Ａと、防蝕継手Ｂ
と、筒状継手部材Ｃとからなる。As shown in FIG. 1, the present invention comprises a corrosion-resistant pipe A and a corrosion-resistant joint B.
and a cylindrical joint member C.
防蝕管Ａは、管端部に雄ねじ２を有する金属管１の外周
面に合成樹脂層３が設けられている０図示していないが
、金属管の内周面にも合成樹脂層を設けてあってもよい
。Corrosion-resistant pipe A has a synthetic resin layer 3 provided on the outer peripheral surface of a metal pipe 1 having a male thread 2 at the end of the pipe.Although not shown, a synthetic resin layer is also provided on the inner peripheral surface of the metal pipe. There may be.
防蝕継手Ｂは、金属短管４と合成樹脂層６とにより構成
され、内周面に雌ねじ５を有する金属短管４の外周面全
体が合成樹脂層６で被覆されている。この合成樹脂層６
の端部に上記金属短管４の端面より延出して被覆部８を
形成し、その外周面から合成樹脂層６の外周面に亘って
雄ねじ７が設けである。被覆部８はその内周面を金属短
管４の端面より緩やかに拡径してある。The corrosion-resistant joint B is composed of a short metal tube 4 and a synthetic resin layer 6, and the entire outer circumferential surface of the short metal tube 4 having a female thread 5 on its inner circumferential surface is covered with the synthetic resin layer 6. This synthetic resin layer 6
A covering part 8 is formed extending from the end face of the short metal tube 4 at the end thereof, and a male thread 7 is provided extending from the outer peripheral surface of the covering part 8 to the outer peripheral surface of the synthetic resin layer 6. The inner circumferential surface of the covering portion 8 is expanded in diameter more gently than the end surface of the short metal tube 4.
筒状継手部材Ｃは、塩化ビニル樹脂、ポリエチレン樹脂
等の熱可塑性樹脂、あるいはフェノール樹脂、メラニン
樹脂等の熱硬化性樹脂からなる外筒９と内筒１１とを備
え、外筒９の内周面には雌ねじｌＯが設けられている。The cylindrical joint member C includes an outer cylinder 9 and an inner cylinder 11 made of thermoplastic resin such as vinyl chloride resin or polyethylene resin, or thermosetting resin such as phenol resin or melanin resin, and the inner periphery of the outer cylinder 9 A female thread lO is provided on the surface.
内筒１１は外筒９の内周側に所定の間隔をもって外筒９
と一体に設けてあり、先端部に従い順次肉薄に形成され
ている。この筒状継手部材Ｃは、第３図（イ）（ロ）に
示す如く、内筒１１の内周面に、または内周面と外周面
とにゴム等の弾性体１２を設けてもよい。このように弾
性体１２を設けであると、シール効果が更に増すので好
ましい。The inner cylinder 11 is attached to the outer cylinder 9 at a predetermined interval on the inner circumferential side of the outer cylinder 9.
It is provided integrally with the tip, and is formed to become thinner sequentially toward the tip. This cylindrical joint member C may be provided with an elastic body 12 such as rubber on the inner peripheral surface of the inner cylinder 11 or on the inner peripheral surface and the outer peripheral surface, as shown in FIGS. 3(a) and 3(b). . Providing the elastic body 12 in this manner is preferable because the sealing effect is further increased.
上記防蝕管Ａを接続するにあたっては、第２図右側に示
すように、まず筒状継手部材Ｃの内筒１１を接続すべき
防蝕管Ａの接合端部外周面に嵌挿しておく０次いで防蝕
管Ａの雄ねじ２の外周に液状シール剤を塗着し、或はシ
ール用テープを巻回して、第２図左側に示すように、防
蝕管Ａの雄ねじ２を防蝕継手Ｂの雌ねじ５にねじ込み、
防蝕管Ａを防蝕継手Ｂに接合する。勿論２木の防蝕管Ａ
を上記と同様に行う、そうすると防蝕管Ａが抜出ないよ
うに接合される。その後に筒状継手部材Ｃを防蝕継手Ｂ
側に移動しそれを回動して、外筒９の雌ねじ１０と防蝕
継手Ｂの雄ねじ７とを螺合させ、筒状継手部材Ｃを防蝕
継手Ｂに螺着する。同時に筒状継手部材Ｃの内筒１１は
防蝕管Ａの外周面と防蝕継手Ｂの被覆部８の内周面との
間に圧接状態に挿入されて、防蝕管Ａの接続が終了する
。このようにして接続された状態においては、筒状継手
部材Ｃの内筒１１の内周面が防蝕管Ａの外周面と面接触
し、内筒１１の外周面は被覆部８の内周面と面接触する
ために、完全にシールされる。換言すれば、金属管ｌ及
び金属短管４は外気から完全に遮断される。また、接続
部分が筒状継手部材Ｃの外筒９により被覆され、しかも
、筒状継手部材Ｃを介して防蝕管Ａと防蝕継手Ｂとが一
体になるので、シール性が助長されると共に、長期持続
するようになる。To connect the corrosion-resistant tube A, as shown on the right side of FIG. Apply a liquid sealant to the outer circumference of the male thread 2 of the pipe A, or wrap a sealing tape around it, and screw the male thread 2 of the corrosion-resistant pipe A into the female thread 5 of the corrosion-resistant joint B, as shown on the left side of Figure 2. ,
Corrosion-resistant pipe A is joined to corrosion-resistant joint B. Of course, two wooden corrosion-resistant pipes A
Do this in the same manner as above, and the corrosion-resistant tube A will be joined so that it will not come out. After that, connect the cylindrical joint member C to the corrosion-resistant joint B.
By moving to the side and rotating it, the female thread 10 of the outer cylinder 9 and the male thread 7 of the corrosion-resistant joint B are screwed together, and the cylindrical joint member C is screwed onto the corrosion-resistant joint B. At the same time, the inner cylinder 11 of the cylindrical joint member C is inserted into pressure contact between the outer peripheral surface of the corrosion-resistant tube A and the inner peripheral surface of the covering portion 8 of the corrosion-resistant joint B, and the connection of the corrosion-resistant tube A is completed. In this connected state, the inner circumferential surface of the inner tube 11 of the cylindrical joint member C is in surface contact with the outer circumferential surface of the corrosion-resistant tube A, and the outer circumferential surface of the inner tube 11 is in surface contact with the inner circumferential surface of the covering section 8. completely sealed for surface contact. In other words, the metal tube 1 and the metal short tube 4 are completely cut off from the outside air. In addition, since the connecting portion is covered by the outer cylinder 9 of the cylindrical joint member C, and the corrosion-resistant pipe A and the corrosion-resistant joint B are integrated via the cylindrical joint member C, sealing performance is promoted, and It will last for a long time.
以上のように本発明の継手は、防蝕管を防蝕継手にねじ
接合したので、防蝕管が抜出るおそれがなく強固に接続
することができる。また、接続部分を筒状継手部材によ
り完全にシールして外気から完全に遮断したので、金属
管や金属短管等の金属面の腐食を防ぐことができる。し
かも、防蝕管と防蝕継手が一体になり、シール性が持続
するので、長期に亘って防蝕効果を奏するものである。As described above, in the joint of the present invention, since the corrosion-resistant pipe is screwed to the corrosion-resistant joint, the corrosion-resistant pipe can be firmly connected without fear of being pulled out. Furthermore, since the connecting portion is completely sealed by the cylindrical joint member and completely isolated from the outside air, corrosion of metal surfaces such as metal pipes and short metal pipes can be prevented. Moreover, since the corrosion-resistant pipe and the corrosion-resistant joint are integrated and the sealing performance is maintained, the corrosion-resistant effect can be achieved over a long period of time.
第１図は一部分を切除した分解斜視図、第２図は防蝕管
の接続要領を示す断面図、第３図（イ）（ロ）は別の実
施例を示す筒状継手部材の断面図である。
図中Ａは防蝕管、Ｂは防蝕継手、Ｃは筒状継手部材、１
は金属管、２は雄ねじ、３は合成樹脂層、４は金属短管
、５は雌ねじ、６は合成樹脂層、７は雄ねじ、８は被覆
部、９は外筒、ｌＯは雌ねじ、１１は内筒を示す。Fig. 1 is an exploded perspective view with a portion cut away, Fig. 2 is a sectional view showing how to connect a corrosion-resistant pipe, and Fig. 3 (a) and (b) are sectional views of a cylindrical joint member showing another embodiment. be. In the figure, A is a corrosion-resistant pipe, B is a corrosion-resistant joint, C is a cylindrical joint member, 1
is a metal tube, 2 is a male thread, 3 is a synthetic resin layer, 4 is a short metal tube, 5 is a female thread, 6 is a synthetic resin layer, 7 is a male thread, 8 is a covering part, 9 is an outer cylinder, IO is a female thread, 11 is a Inner cylinder is shown.
Claims (1)
層３を設けた防蝕管Ａと、内周面に雌ねじ５を有する金
属短管４の外周全面を合成樹脂層６で被覆し、該合成樹
脂層６の端部を金属短管４の端面より延出し被覆部８を
形成してその外周面に雄ねじ７を設けると共に、該被覆
部８の内周面を金属短管４の端面より拡径してある防蝕
継手Ｂと、内周面に雌ねじ１０を有する外筒９の内側に
、外筒９より間隔をもって内筒１１を設けた筒状継手部
材Ｃとからなり、防蝕管Ａの雄ねじ２を防蝕継手Ｂの雌
ねじ５にねじ込んで接合し、筒状継手部材Ｃの雌ねじ１
０を防蝕継手Ｂの雄ねじ７に螺着すると共に、筒状継手
部材Ｃの内筒１１を防蝕管Ａの外周面と防蝕継手Ｂの被
覆部８の内周面と一の間隙に圧接挿入してあることを特
徴とする防蝕管の継手。Corrosion-resistant tube A has a synthetic resin layer 3 on the outer circumferential surface of a metal tube 1 having a male thread 2 at the tube end, and a short metal tube 4 has a female thread 5 on the inner circumferential surface, the entire outer circumference of which is covered with a synthetic resin layer 6. The end of the synthetic resin layer 6 is extended from the end face of the short metal tube 4 to form a sheathing section 8, and a male thread 7 is provided on the outer circumferential surface of the sheathing section 8. It consists of a corrosion-resistant joint B whose diameter is enlarged from the end face, and a cylindrical joint member C in which an inner cylinder 11 is provided inside an outer cylinder 9 having a female thread 10 on the inner peripheral surface with an interval from the outer cylinder 9. The male thread 2 of A is screwed into the female thread 5 of the corrosion-resistant joint B, and the female thread 1 of the cylindrical joint member C is connected.
0 to the male thread 7 of the corrosion-resistant joint B, and the inner cylinder 11 of the cylindrical joint member C is pressed into the gap between the outer peripheral surface of the corrosion-resistant pipe A and the inner peripheral surface of the coating part 8 of the corrosion-resistant joint B. A corrosion-resistant pipe fitting characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13992789A JPH039197A (en) | 1989-06-01 | 1989-06-01 | Joint for anticorrosive pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13992789A JPH039197A (en) | 1989-06-01 | 1989-06-01 | Joint for anticorrosive pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH039197A true JPH039197A (en) | 1991-01-17 |
Family
ID=15256906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13992789A Pending JPH039197A (en) | 1989-06-01 | 1989-06-01 | Joint for anticorrosive pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH039197A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006275177A (en) * | 2005-03-29 | 2006-10-12 | Osaka Gas Co Ltd | Anticorrosive method of pipe connecting part |
| CN110332380A (en) * | 2019-06-05 | 2019-10-15 | 代玉梅 | One kind doing method for oil field ground pipeline corrosion protection device and behaviour |
-
1989
- 1989-06-01 JP JP13992789A patent/JPH039197A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006275177A (en) * | 2005-03-29 | 2006-10-12 | Osaka Gas Co Ltd | Anticorrosive method of pipe connecting part |
| CN110332380A (en) * | 2019-06-05 | 2019-10-15 | 代玉梅 | One kind doing method for oil field ground pipeline corrosion protection device and behaviour |
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