JPS63191600A - Method of cutting piping - Google Patents
Method of cutting pipingInfo
- Publication number
- JPS63191600A JPS63191600A JP2368487A JP2368487A JPS63191600A JP S63191600 A JPS63191600 A JP S63191600A JP 2368487 A JP2368487 A JP 2368487A JP 2368487 A JP2368487 A JP 2368487A JP S63191600 A JPS63191600 A JP S63191600A
- Authority
- JP
- Japan
- Prior art keywords
- cut
- section
- piping
- extremely small
- cutting
- 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
- 238000000034 method Methods 0.000 title claims description 17
- 239000007788 liquid Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は既設配管の鉛直部を横方向に切断する配管の切
断方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for cutting existing piping in a vertical direction.
（従来の技術）
原子カプラント、火力プラント、化学プラント等の各種
プラントでは、既設配管の鉛直部を横方向に切断する場
合、第１１図に示すように、先ず既設配管（ａ）の水平
部をベベリングマシン（ｂ）により切断しく第１１図（
Ｉ）参照）２次いで切断した水平部から切粉落下防止用
バルーン（ｃ）を既設配管（ａ）内に挿入しく第１１図
（ＩＩ）参照）。(Prior art) In various plants such as nuclear power plants, thermal power plants, and chemical plants, when cutting the vertical part of existing piping in the horizontal direction, first cut the horizontal part of the existing piping (a) as shown in Figure 11. Figure 11 (
(See Figure 11 (II)) 2) Next, insert the balloon (c) for preventing chips from falling into the existing pipe (a) from the cut horizontal part (see Figure 11 (II)).
次いで既設配管（ａ）の鉛直部切断個所（ａｌ）の大半
をベベリングマシン（ｂ）により横方向に切断しく第１
１図（ＩＩＩ）参照）２次いで残った鉛直部切断個所（
ａｌ）を鋸（ｄ）またはタガネにより切断すると同時に
切粉を真空引きして回収し１次いで切粉落下防止用バル
ーン（ｃ）を既設配管（ａ）内から除去して（第１１図
（ＩＶ）参照）、既設配管（ａ）鉛直部の横方向切断作
業を完了するようにしている。Next, most of the vertical cut points (al) of the existing piping (a) are cut horizontally using a beveling machine (b).
(See Figure 1 (III)) 2) Next, cut the remaining vertical part (
Al) is cut with a saw (d) or a chisel, the chips are vacuumed and collected at the same time, and the balloon (c) for preventing chips from falling is removed from the existing piping (a) (Fig. 11 (IV ), the horizontal cutting work of the vertical section of existing piping (a) is being completed.
（発明が解決しようとする問題点）
前記第１１図に示す配管の切断方法では、切粉が完全に
回収されるとは限らず、一部が残った場合には、配管工
事後のプラントの運転に支障を生じるという問題があっ
た。特に原子カプラントにおいては、残った切粉を複雑
な手順で除去しなければならなくて、配管切断工事上の
隘路になっていた。(Problems to be Solved by the Invention) In the piping cutting method shown in FIG. There was a problem in that it interfered with driving. Particularly in atomic couplers, remaining chips must be removed through complicated procedures, creating a bottleneck in pipe cutting work.
（問題点を解決するための手段）
本発明は前記の問題点に対処するもので、既設配管の鉛
直部を横方向に切断するに当たり、配管切断部を円周方
向に切削して極小肉厚部を形成し。(Means for Solving the Problems) The present invention addresses the above-mentioned problems, and when cutting the vertical part of existing piping in the horizontal direction, the pipe cutting part is cut in the circumferential direction to minimize the wall thickness. form part.
次いで同切削部上方の配管部分を固定支持し１次いで上
記極小肉厚部を火炎により加熱した後、同極小肉厚部を
極低温液体により冷却して、収縮。Next, the piping section above the cutting part is fixedly supported, and then the extremely small thick part is heated by flame, and then the extremely small thick part is cooled with a cryogenic liquid to contract.
破断することを特徴としている。It is characterized by breaking.
また既設配管の鉛直部を横方向に切断するに当たり、配
管切断部を円周方向に切削して極小肉厚部を形成し９次
いで同切削部上方の配管部分を固定支持し１次いで同切
削部上下の配管部分に振動を加えて、上記極小肉厚部を
破断することを特徴としている。In addition, when cutting the vertical part of the existing piping in the horizontal direction, the cut part of the pipe is cut in the circumferential direction to form a very small wall thickness part, and then the piping part above the cut part is fixedly supported, and then the cut part is It is characterized by applying vibration to the upper and lower piping parts to break the extremely small wall thickness part.
本発明の目的とする処は、配管切断作業の能率を向上で
きる。また配管切断時に切粉を配管内に残留させること
がなくて、配管工事後のプラントの運転に支障を生じさ
せない改良された配管の切断方法を供する点にある。An object of the present invention is to improve the efficiency of pipe cutting work. Another object of the present invention is to provide an improved method for cutting pipes that does not leave chips remaining in the pipes when cutting the pipes, thereby causing no hindrance to the operation of the plant after pipe work.
（作用）
本発明の配管の切断方法は前記のように構成されており
、先ず配管部・断部を円周方向に切削して極小肉厚部を
形成し１次いで同切削部上方の配管部分を固定支持し１
次いで上記極小肉厚部を火炎により加熱した後、同極小
肉厚部を極低温液体により冷却して、収縮、破断する。(Function) The pipe cutting method of the present invention is configured as described above, and first, the pipe section/cut section is cut in the circumferential direction to form an extremely small wall thickness section, and then the pipe section above the cut section is cut. Fixedly support 1
Next, after heating the extremely small thick part with a flame, the extremely small thick part is cooled with a cryogenic liquid to contract and break.
また配管切断部を円周方向に切削して極小肉厚部を形成
し２次いで同切削部上方の配管部分を固定支持し２次い
で同切削部上下の配管部分に振動を加えて、上記極小肉
厚部を振動疲労により破断する。In addition, the piping cut section is cut in the circumferential direction to form an extremely small wall thickness section, the piping section above the cut section is fixedly supported, and the piping section above and below the cutting section is vibrated to form an extremely small wall thickness section. The thick part breaks due to vibration fatigue.
（実施例）
次に本発明に係わる配管の切断方法の一実施例を第１図
乃至第８図により説明すると、（１）が既設配管、 （
２） （３）が冷却箱、（４）がセットボルト、（５）
がガスバーナ、（６）がノズル、（７）が弁、（８）が
チェーンブロック、（９）がアセチレンボンベ、 （１
０）が酸素ボンベ、 （１１）が液体窒素（極低温液体
）ボンベである。(Example) Next, an example of the pipe cutting method according to the present invention will be explained with reference to Figs. 1 to 8. (1) shows the existing pipe, (
2) (3) is the cooling box, (4) is the set bolt, (5)
is the gas burner, (6) is the nozzle, (7) is the valve, (8) is the chain block, (9) is the acetylene cylinder, (1
0) is an oxygen cylinder, and (11) is a liquid nitrogen (cryogenic liquid) cylinder.
次に前記各機器を使用して行われる配管の切断方法を具
体的に説明すると、先ず第１図に示すように配管（１）
鉛直部の切断個所外周面をベベリングマシンにより円周
方向に切削して、厚さく１）の極小肉厚部（１ａ）を形
成する。なお同厚さく１）の極小肉厚部（１ａ）は、第
２．３．４図に示すような断面形状でもよい。次いで第
５，７図に示すように同極小肉厚部（１ａ）の上方の配
管（１）部分をチェーンブロック（８）により固定支持
し２次いでアセチレンボンベ（９）及び酸素ボンベ（１
０）を配管（１）の近くに設置し、同各ボンベ（９）
（１０）からガスパー−１−（５） （５）へアセチレ
ンガス及び酸素を送り。Next, to specifically explain how to cut pipes using each of the above-mentioned devices, first, as shown in Figure 1, pipe (1) is cut.
The outer circumferential surface of the cut portion of the vertical portion is cut in the circumferential direction using a beveling machine to form a minimally thick portion (1a) having a thickness of 1). Note that the minimally thick portion (1a) having the same thickness 1) may have a cross-sectional shape as shown in FIG. 2.3.4. Next, as shown in FIGS. 5 and 7, the pipe (1) above the extremely thin wall part (1a) is fixedly supported by a chain block (8), and then the acetylene cylinder (9) and the oxygen cylinder (1) are fixedly supported.
0) near the piping (1), and each cylinder (9)
Send acetylene gas and oxygen from (10) to Gaspar-1-(5) (5).
アセチレンガスを着火、燃焼させて、上記極小肉厚部（
１ａ）を均一に加熱し９次いで第６．８図に示すように
液体窒素ボンベ（１１）を配管（１）の近くに設置する
一方、冷却箱（３） （４）を接近させて、セットボル
ト（４）により配管（１）に固定し１次いで弁（７）を
開き、液体窒素ボンベ（１１）からノズル（６）へ液体
窒素を送り、加熱した極小肉厚部（１ａ）を極低温の同
液体窒素により急冷して、極小肉厚部（１ａ）を収縮、
破断する。By igniting and burning acetylene gas,
1a) is heated uniformly, then the liquid nitrogen cylinder (11) is installed near the piping (1) as shown in Figure 6.8, while the cooling boxes (3) and (4) are brought close together and set. Fix it to the pipe (1) with the bolt (4), then open the valve (7), send liquid nitrogen from the liquid nitrogen cylinder (11) to the nozzle (6), and bring the heated extremely small thick part (1a) to an extremely low temperature. The extremely small thick part (1a) is shrunk by rapidly cooling it with the same liquid nitrogen,
break.
次に本発明に係わる配管の切断方法の他の実施例を第９
，１０図により説明すると、（１）が配管。Next, another example of the pipe cutting method according to the present invention will be described in the ninth section.
To explain using Figure 10, (1) is the piping.
（８）がチェーンブロック、 （１２）がパイブレーク
である。(8) is a chain block, and (12) is a pie break.
次に前記各機器を使用して行われる配管の切断方法を具
体的に説明すると、先ず第９図に示すように配管（１）
鉛直部の切断個所外周面をベベリングマシンにより円周
方向に切削して、厚さく１）の極小肉厚部（１ａ）を形
成し２次いで第１０図に示すように同極小肉厚部（１ａ
）の上方の配管（１）部分をチェーンブロック（８）に
より固定支持し１次いで上記極小肉厚部（ｌａ）上下の
配管（１）部分にパイプレーク（１２） （１２）を当
てがい、配管（１）に微振動を加えて、上記極小肉厚部
（１ａ）を振動疲労により破断する。Next, to specifically explain the method of cutting pipes using each of the above-mentioned devices, first, as shown in Fig. 9, pipe (1) is cut.
The outer peripheral surface of the cut point of the vertical part is cut in the circumferential direction using a beveling machine to form a very small wall thickness part (1a) with a thickness of 1). 1a
) is fixedly supported by a chain block (8), and then pipe rakes (12) (12) are applied to the pipe (1) above and below the minimally thick part (la). A slight vibration is applied to (1) to break the minimally thick portion (1a) due to vibration fatigue.
（発明の効果）
本発明の配管の切断方法は前記のように先ず配管切断部
を円周方向に切削して極小肉厚部を形成し９次いで同切
削部上方の配管部分を固定支持し。(Effects of the Invention) As described above, in the pipe cutting method of the present invention, the pipe cutting section is first cut in the circumferential direction to form an extremely small wall thickness section, and then the pipe section above the cut section is fixedly supported.
次いで上記極小肉厚部を火炎により加熱した後。Next, after heating the above-mentioned extremely small thick part with a flame.
同極小肉厚部を極低温液体により冷却して、収縮。The extremely small wall thickness is cooled with cryogenic liquid and shrinks.
破断するか、配管切断部を円周方向に切削して極小肉厚
部を形成し１次いで同切削部上方の配管部分を固定支持
し１次いで同切削部上下の配管部分に振動を加えて、上
記極小肉厚部を振動疲労により破断するので、鋸または
タガネによる切断、及び切粉の真空引きによる回収等が
不要で、配管切断作業の能率を向上できる。また配管切
断時に切粉を配管内に残留させることがなくて、配管工
事後のプラントの運転に支障を生じさせない効果がある
。Either by breaking or by cutting the cut section of the pipe in the circumferential direction to form an extremely small thickness section, then fixing and supporting the pipe section above the cut section, and then applying vibration to the pipe section above and below the cut section. Since the extremely small wall thickness portion is broken by vibration fatigue, there is no need for cutting with a saw or chisel, collection of chips by vacuuming, etc., and the efficiency of pipe cutting work can be improved. Furthermore, no chips are left in the pipes when the pipes are cut, so there is no problem in plant operation after the pipe work is completed.
第１図は本発明に係わる配管の切断方法の一実施例の極
小肉厚部形成工程を示す縦断側面図、第２．３．４図は
同極小肉厚部の他の例を示す縦断側面図、第５．７図は
極小肉厚部の加熱工程を示す説明図、第６，８図は極小
肉厚部の冷却工程を示す説明図、第９図は本発明に係わ
る配管の切断方法の他の実施例の極小肉厚部を示す縦断
側面図。
第１０図は配管の加振工程を示す説明図、第１１図は従
来の配管の切断方法を示す説明図である。
（１）・・・配管、 （ｌａ） ・・・極小肉厚部、
（２） （３）・・・冷却箱、（４）・・・セットポ
ル） 、 （５）・・・ガスバーナ、（６）・・・極低
温液体用ノズル、（７）・・・弁、（８）・・・チェー
ンブロック、（９）・・・アセチレンボンベ、 （１０
） ・・・酸素ボンベ、（１１） ・・・液体窒素
（極低温液体）ボンベ、 （１２）・・・パイブレーク
。Fig. 1 is a longitudinal side view showing the step of forming an extremely small wall thickness part in an embodiment of the pipe cutting method according to the present invention, and Fig. 2.3.4 is a longitudinal side view showing another example of the same extremely small wall thickness part. Figures 5 and 7 are explanatory diagrams showing the heating process of the extremely small wall thickness part, Figures 6 and 8 are explanatory diagrams showing the cooling process of the extremely small wall thickness part, and Figure 9 is an explanatory diagram showing the cooling process of the extremely small wall thickness part. FIG. 7 is a vertical cross-sectional side view showing an extremely small wall thickness portion of another embodiment. FIG. 10 is an explanatory diagram showing a piping vibration process, and FIG. 11 is an explanatory diagram showing a conventional piping cutting method. (1)... Piping, (la)... Very small wall thickness part,
(2) (3)...Cooling box, (4)...Set pole), (5)...Gas burner, (6)...Cryogenic liquid nozzle, (7)...Valve, ( 8)...Chain block, (9)...Acetylene cylinder, (10
)...oxygen cylinder, (11)...liquid nitrogen (cryogenic liquid) cylinder, (12)...pie break.
Claims (2)
配管切断個所を円周方向に切削して極小肉厚部を形成し
、次いで同切削部上方の配管部分を固定支持し、次いで
上記極小肉厚部を火炎により加熱した後、同極小肉厚部
を極低温液体により冷却して、収縮、破断することを特
徴とした配管の切断方法。(1) When cutting the vertical part of existing piping in the horizontal direction,
Cut the piping cut point in the circumferential direction to form an extremely small wall thickness section, then fixedly support the piping section above the cut section, then heat the extremely small wall section with a flame, and then cut the extremely small wall thickness section. A pipe cutting method characterized by cooling pipes with cryogenic liquid to cause them to shrink and break.
配管切断個所を円周方向に切削して極小肉厚部を形成し
、次いで同切削部上方の配管部分を固定支持し、次いで
同切削部上下の配管部分に振動を加えて、上記極小肉厚
部を破断することを特徴とした配管の切断方法。(2) When cutting the vertical part of existing piping in the horizontal direction,
Cut the piping cut point in the circumferential direction to form an extremely small wall thickness section, then fixedly support the piping section above the cut section, and then apply vibration to the piping sections above and below the cut section to create the extremely small wall thickness section. A method of cutting piping characterized by breaking the section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2368487A JPS63191600A (en) | 1987-02-05 | 1987-02-05 | Method of cutting piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2368487A JPS63191600A (en) | 1987-02-05 | 1987-02-05 | Method of cutting piping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63191600A true JPS63191600A (en) | 1988-08-09 |
Family
ID=12117281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2368487A Pending JPS63191600A (en) | 1987-02-05 | 1987-02-05 | Method of cutting piping |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63191600A (en) |
-
1987
- 1987-02-05 JP JP2368487A patent/JPS63191600A/en active Pending
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