JPH0321819Y2 - - Google Patents
Info
- Publication number
- JPH0321819Y2 JPH0321819Y2 JP1773786U JP1773786U JPH0321819Y2 JP H0321819 Y2 JPH0321819 Y2 JP H0321819Y2 JP 1773786 U JP1773786 U JP 1773786U JP 1773786 U JP1773786 U JP 1773786U JP H0321819 Y2 JPH0321819 Y2 JP H0321819Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- arm
- torch
- powder
- cooling gas
- 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
- 238000003466 welding Methods 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 12
- 239000000112 cooling gas Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 7
- 238000000151 deposition Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 5
- 238000013021 overheating Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【考案の詳細な説明】
［産業上の利用分野］
この考案は石油掘削用管のような金属製のパイ
プの内面に耐蝕性、耐摩耗性等を向上させるため
肉盛溶接による被覆層を形成させるパイプ内面肉
盛装置に関するものでる。[Detailed explanation of the invention] [Industrial application field] This invention forms a coating layer by overlay welding on the inner surface of metal pipes such as oil drilling pipes to improve corrosion resistance, abrasion resistance, etc. This article relates to a device for overlaying the inner surface of a pipe.
［従来技術の問題点］
従来から金属表面の耐摩耗性、耐蝕性等を向上
させるため該表面にその目的に応じて配合された
コバルト基合金、ニツケル基合金、鉄クローム合
金等の粉末をプラズマアークによつて溶融させて
肉盛溶接し被覆層を形成することが行なわれてい
る。[Problems with the prior art] Conventionally, in order to improve the wear resistance, corrosion resistance, etc. of metal surfaces, powders of cobalt-based alloys, nickel-based alloys, iron-chromium alloys, etc., blended according to the purpose, are applied to the metal surfaces using plasma. A coating layer is formed by melting with an arc and overlay welding.
しかしてこの粉末肉盛溶接を石油掘削用管のよ
うな長尺パイプの内面に実施しようとすると次の
ような問題点が生じる。即ち、長尺パイプの内面
への粉末肉盛溶接は長尺パイプ内にアームを挿入
し、該アームの先端に設けられたトーチにアーム
中を通して肉盛溶接用粉末、およびアルゴンガス
等のプラズマガスおよびシールドガスおよび冷却
水、アーク電流を供給し、該トーチの中心部に設
けられた棒状電極と長尺パイプ内面との間にプラ
ズマアークを発生させ該粉末をこのプラズマアー
ク中に供給して溶融させ長尺パイプの内面にこれ
を融着させることによつてなされるが、その場合
プラズマアークは数千度の高温度になりその熱が
長尺パイプ内にこもりトーチおよびアームを思わ
ぬ高温度に過熱させることがあり、それに伴なう
事故や故障が懸念された。 However, when powder overlay welding of levers is attempted to be performed on the inner surface of a long pipe such as a pipe for oil drilling, the following problems arise. That is, for powder overlay welding on the inner surface of a long pipe, an arm is inserted into the long pipe, and the overlay welding powder and plasma gas such as argon gas are passed through the arm through a torch provided at the tip of the arm. Then, shielding gas, cooling water, and arc current are supplied to generate a plasma arc between the rod-shaped electrode provided at the center of the torch and the inner surface of the long pipe, and the powder is fed into this plasma arc and melted. This is done by fusing it to the inner surface of a long pipe, but in that case, the plasma arc reaches a high temperature of several thousand degrees, and the heat is trapped inside the long pipe, causing the torch and arm to reach unexpectedly high temperatures. There were concerns that this could lead to overheating, resulting in accidents and breakdowns.
［問題点を解決するための手段］
この考案は上記の問題点を解決するもので、パ
イプ内に挿入されるアームの先端にトーチが設け
られ、該トーチをパイプの内面に対向させ該トー
チによつて形成されるアーク中に肉盛溶接用粉末
を供給してパイプの内面に粉末肉盛溶接を行うも
のであつて、前記アームは中空のセラミツクス製
パイプよりなり、該アーム中にその基端部より冷
却用ガスを供給し該冷却用ガスを該アーム中に通
しさらにトーチとの連結部を経て該トーチのヘツ
ドキヤツプの内側間隙に通し外部に排出させるよ
うにしたことを特徴とするパイプ内面肉盛装置で
ある。[Means for Solving the Problems] This invention solves the above problems.A torch is provided at the tip of an arm inserted into a pipe, and the torch is placed opposite the inner surface of the pipe. Powder overlay welding is performed on the inner surface of the pipe by supplying powder for overlay welding into the arc thus formed, and the arm is made of a hollow ceramic pipe, and the base end of the arm is The inner surface of the pipe is characterized in that cooling gas is supplied from the arm, the cooling gas is passed through the arm, and further passed through the inner gap of the head cap of the torch through the connection part with the torch and discharged to the outside. It is a serving device.
［実施例］ 次にこの考案の実施例を図面と共に説明する。[Example] Next, an embodiment of this invention will be described with reference to the drawings.
第１図、第２図に示したパイプ内面肉盛装置
は、軸受１，２によつて水平に支持された一対の
平行軸４，４がモータ５によつて回転駆動される
ように構成され、該平行軸４，４には支持輪６，
６を固着し、該支持輪上にて長尺パイプ７を水平
姿態に支持している。８はこの長尺パイプ中に挿
入されるアームで、該アーム８は中空のセラミツ
クス製パイプよりなりその内部には給電線、プラ
ズマガス供給管、シールガス供給管、冷却水供給
管、排水管および肉盛溶接用粉末の供給用管等の
配管９ａ〜９ｆが配設されている。１０はアーム
８の先端に固着されたプラズマトーチで、該プラ
ズマトーチは第３図に拡大して示したようにトー
チ本体１１の外周がセラミツク製筒体１２によつ
て囲われ、その上部にセラミツク製で円板状のヘ
ツドキヤツプ１３が被され、下部は同じくセラミ
ツクス製の環状のノズルキヤツプ１４が嵌着され
ている。また１５はアーム８の基端部を閉塞する
端末キヤツプである。しかして１６はこの端末チ
キヤツプ１５を貫通してアーム８中に低温度の冷
却用ガスを供給する送込管、１７はアーム８の先
端とトーチ１０との連結部に開設された連通孔
で、送込管１６からアーム８中に供給された冷却
用ガスはアーム８中を通過し連通孔１７を経てト
ーチ１０のヘツドキヤツプ１３の内側間隙１８を
通り該トーチ１０の一側に開始された排気孔１９
より外部に排出されるようにしている。なお２０
は把持部２１にてアーム８の基端部を把持し該ア
ームを進退動させるマニプレータである。しかし
てこの装置ではアーム８を長尺パイプ７内に挿入
しトーチ１０を該長尺パイプの内面に所要の間隙
をもつて対向させる。そしてプラズマアークを発
生させ肉盛溶接用粉末をそのプラズマアークにて
溶融させ長尺パイプ７内面にこれを融着させる。
そして長尺パイプ７はモータ５の駆動で回転させ
ると共にマニプレータ２０を作動させてトーチ１
０をゆつくり後退させることによつてトーチ１０
が長尺パイプ７の内面に螺旋状の軌跡を描いて対
向するようにして長尺パイプ７の内面に螺旋状に
肉盛溶接を旋してゆく。 The pipe inner surface build-up device shown in FIGS. 1 and 2 is configured such that a pair of parallel shafts 4, 4 supported horizontally by bearings 1, 2 are rotationally driven by a motor 5. , the parallel shafts 4, 4 have support wheels 6,
6 is fixed to the support ring, and a long pipe 7 is supported in a horizontal position on the support ring. Reference numeral 8 denotes an arm inserted into this long pipe, and the arm 8 is made of a hollow ceramic pipe, and inside thereof there are a power supply line, a plasma gas supply pipe, a seal gas supply pipe, a cooling water supply pipe, a drain pipe, and the like. Pipes 9a to 9f, such as pipes for supplying powder for overlay welding, are provided. Reference numeral 10 denotes a plasma torch fixed to the tip of the arm 8. As shown in an enlarged view in FIG. It is covered with a disk-shaped head cap 13 made of ceramics, and an annular nozzle cap 14 also made of ceramics is fitted to the lower part. Further, 15 is a terminal cap that closes the base end of the arm 8. 16 is an inlet pipe that passes through the terminal cap 15 and supplies low-temperature cooling gas into the arm 8; 17 is a communication hole opened at the connection between the tip of the arm 8 and the torch 10; The cooling gas supplied into the arm 8 from the inlet pipe 16 passes through the arm 8, passes through the communication hole 17, passes through the inner gap 18 of the head cap 13 of the torch 10, and passes through the exhaust hole started on one side of the torch 10. 19
This allows more of the water to be discharged to the outside. In addition, 20
is a manipulator that grips the base end of the arm 8 with a grip portion 21 and moves the arm forward and backward. However, in this lever device, the arm 8 is inserted into the elongated pipe 7, and the torch 10 is opposed to the inner surface of the elongated pipe with a required gap. Then, a plasma arc is generated, and the overlay welding powder is melted by the plasma arc and fused to the inner surface of the long pipe 7.
Then, the long pipe 7 is rotated by the drive of the motor 5, and the manipulator 20 is operated to make the torch 1
By slowly retracting 0, the torch 10
Overlay welding is spirally applied to the inner surface of the long pipe 7 so that the welds draw a spiral trajectory on the inner surface of the long pipe 7 and are opposed to each other.
アーム８およびトーチ１０はプラズマアークの
熱を受けて高温度に加熱されるが、アーム８はセ
ラミツクス製で耐熱性が高いと共にトーチ１０は
周囲がセラミツク製の筒体１２等によつて囲われ
ていてその耐熱性が高い。またアーム８中を流れ
る冷却用ガスは該アームの熱を奪つてその過熱に
よる障害例えばアーム８の撓みを防ぎ、さらにこ
の冷却用ガスは連通孔１７を通り間隙１８に流入
し該トーチ１０の上面の排熱を奪いその過熱を防
止し排気孔１９より外部に排出する。 The arm 8 and the torch 10 are heated to a high temperature by receiving the heat of the plasma arc, but the arm 8 is made of ceramic and has high heat resistance, and the torch 10 is surrounded by a cylindrical body 12 etc. made of ceramic. Its heat resistance is high. In addition, the cooling gas flowing through the arm 8 removes heat from the arm to prevent damage caused by overheating, such as bending of the arm 8. Furthermore, the cooling gas flows into the gap 18 through the communication hole 17 and flows into the upper surface of the torch 10. The waste heat is taken away to prevent the heat from overheating and is discharged to the outside through the exhaust hole 19.
［考案の効果］
以上実施例について説明したようにこの考案の
パイプ内面肉盛装置は、アーム中からトーチにわ
たり流通する冷却用ガスによりそれらの過熱を効
果的に防止し得るようにした。このため熱のこも
り易い長尺パイプ内でのプラズマアークによる粉
末肉盛溶接等を可能ならしめる有益なものであ
る。[Effects of the Invention] As described above with respect to the embodiments, the pipe inner surface build-up device of this invention is capable of effectively preventing overheating of the torch by using the cooling gas that flows from the inside of the arm to the torch. Therefore, it is useful because it enables powder build-up welding by plasma arc in long pipes where heat tends to accumulate.
図面はこの考案の実施例を示したもので、第１
図は部分縦断面側面図、第２図は第１図のＡ−Ａ
線断面図、第３図はアームの拡大縦断面図であ
る。
７……パイプ、８……アーム、１０……トー
チ、１１……トーチ本体、１２……筒体、１３…
…ヘツドキヤツプ、１６……送込管、１７……連
通孔、１８……間隙、１９……排気孔。
The drawing shows an embodiment of this invention.
The figure is a partial vertical cross-sectional side view, and Figure 2 is A-A of Figure 1.
A line sectional view, and FIG. 3 is an enlarged longitudinal sectional view of the arm. 7...Pipe, 8...Arm, 10...Torch, 11...Torch body, 12...Cylinder, 13...
... head cap, 16 ... feed pipe, 17 ... communication hole, 18 ... gap, 19 ... exhaust hole.
Claims (1)
設けられ、該トーチをパイプの内面に対向させ該
トーチによつて形成されるアーク中に肉盛溶接用
粉末を供給してパイプの内面に粉末肉盛溶接を行
うものであつて、前記アームは中空のセラミツク
ス製パイプよりなり、該アーム中にその基端部よ
り冷却用ガスを供給し該冷却用ガスを該アーム中
に通しさらにトーチとの連結部を経て該トーチの
ヘツドキヤツプの内側間隙に通し外部に排出させ
るようにしたことを特徴とするパイプ内面肉盛装
置。 A torch is provided at the tip of the arm that is inserted into the pipe, and the torch is placed opposite the inner surface of the pipe, and powder for overlay welding is supplied into the arc formed by the torch, thereby depositing powder welding on the inner surface of the pipe. The arm is made of a hollow ceramic pipe, and cooling gas is supplied into the arm from its base end, and the cooling gas is passed through the arm and further connected to a torch. 1. A device for building up an inner surface of a pipe, characterized in that the pipe is discharged to the outside by passing through the inner gap of the head cap of the torch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1773786U JPH0321819Y2 (en) | 1986-02-10 | 1986-02-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1773786U JPH0321819Y2 (en) | 1986-02-10 | 1986-02-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62131781U JPS62131781U (en) | 1987-08-20 |
| JPH0321819Y2 true JPH0321819Y2 (en) | 1991-05-13 |
Family
ID=30810761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1773786U Expired JPH0321819Y2 (en) | 1986-02-10 | 1986-02-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0321819Y2 (en) |
-
1986
- 1986-02-10 JP JP1773786U patent/JPH0321819Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62131781U (en) | 1987-08-20 |
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