JPH0433541B2 - - Google Patents
Info
- Publication number
- JPH0433541B2 JPH0433541B2 JP61143032A JP14303286A JPH0433541B2 JP H0433541 B2 JPH0433541 B2 JP H0433541B2 JP 61143032 A JP61143032 A JP 61143032A JP 14303286 A JP14303286 A JP 14303286A JP H0433541 B2 JPH0433541 B2 JP H0433541B2
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- cut
- transfer type
- power supply
- plasma
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000002285 radioactive effect Effects 0.000 claims description 7
- 239000002910 solid waste Substances 0.000 claims description 7
- 210000002381 plasma Anatomy 0.000 description 42
- 239000007789 gas Substances 0.000 description 10
- 230000007704 transition Effects 0.000 description 4
- 101100008044 Caenorhabditis elegans cut-1 gene Proteins 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は例えば原子力発電所から発生する高放
射性固体廃棄物の切断法に係り、特に各種電気的
及び機械的物性をもつた表面皮膜が付着した金属
材料の効率的な水中切断を行う方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for cutting highly radioactive solid waste generated, for example, from nuclear power plants, and particularly relates to a method for cutting highly radioactive solid waste generated from nuclear power plants, and in particular, it relates to a method for cutting highly radioactive solid waste generated, for example, from nuclear power plants. The present invention relates to a method for efficiently cutting metal materials underwater.
従来の切断法は、特開昭59−187298号公報に記
載のように被切断材と切断トーチ間に電位差をも
たせ、この間にアークを発生させてその熱エネル
ギで被切断材を溶融切断するものであつた。しか
し、そのためには被切断材が導電体であることが
切断条件の基本であり、例えばセラミツクスのよ
うな非導電体の切断は不可能で、本法の切断対象
となる廃棄物の表面には、使用期間が長ければ長
いほど表面にセラミツク状の物質が付着してい
る。
The conventional cutting method, as described in Japanese Patent Application Laid-Open No. 59-187298, involves creating a potential difference between the material to be cut and a cutting torch, generating an arc during this time, and melting and cutting the material using the thermal energy. It was hot. However, in order to do this, the basic cutting condition is that the material to be cut is a conductor; for example, it is impossible to cut non-conductors such as ceramics, and the surface of the waste to be cut by this method is The longer the product is used, the more ceramic-like substances will adhere to its surface.
上記従来技術は、被切断材の表面に非導電性物
質が付着する点について配慮がされておらず、プ
ラズマトーチと被切断材との間にアークが発生し
づらく、安定した切断ができない問題があつた。
従来の方法ではこの対策として、表面の付着物を
機械的に除去後プラズマ切断をするなどの方法で
対応しているが、作業時間がかかり手順が複雑で
作業効率が悪く、この改善が強く望まれている。
The above conventional technology does not take into consideration the fact that non-conductive substances may adhere to the surface of the material to be cut, and there is a problem in that it is difficult to generate an arc between the plasma torch and the material to be cut, making stable cutting impossible. It was hot.
Conventional methods deal with this problem by mechanically removing the deposits on the surface and then using plasma cutting, but this takes time and requires complicated procedures, resulting in poor work efficiency, so improvements in this approach are strongly desired. It is rare.
本発明の目的は、このような被切断材の表面の
電気的或は機械的物性に全く影響を受けず、水中
で安定した切断性能を有する切断法を提供するこ
とにある。 An object of the present invention is to provide a cutting method that is completely unaffected by the electrical or mechanical properties of the surface of the material to be cut and has stable cutting performance underwater.
上記目的は、非移行式プラズマジエツト用の電
源装置と移行式プラズマアーク用の電源装置を
別々に備え、一本或いは複数本のプラズマトーチ
をそれらの電源装置に接続し、非移行式プラズマ
ジエツトと移行式プラズマアークとを併用し、非
移行式プラズマジエツト用の電源装置により発生
したプラズマジエツトで被切断材の表面皮膜を除
去しながら、同時に移行式プラズマアーク用の電
源装置により発生したプラズマアークで被切断材
を切断することにより達成される。一般にプラズ
マアーク切断は移行式であり、プラズマトーチと
被切断材の間に電源を接続し電位差を設けかつト
ーチのノズル孔から動作ガスを流出してアークを
発生させて、この熱エネルギと噴出ガスの力で溶
融切断するものである。熱エネルギが大きいこと
から厚板の切断に適した方法として最近特に、原
子炉解体の基本技術として水中切断の主流となつ
ている。
The above purpose is to separately provide a power supply for a non-transfer type plasma jet and a power supply for a transfer type plasma arc, connect one or more plasma torches to these power supplies, and generate a non-transfer type plasma jet. A jet and a transfer type plasma arc are used together, and the surface film of the material to be cut is removed by the plasma jet generated by the power supply for the non-transfer type plasma jet, and at the same time, the plasma jet generated by the power supply for the transfer type plasma arc is used. This is achieved by cutting the material with a plasma arc. In general, plasma arc cutting is a transition type, in which a power source is connected between the plasma torch and the material to be cut to create a potential difference, and working gas flows out from the nozzle hole of the torch to generate an arc, and this heat energy and the ejected gas are It melts and cuts with the force of . Underwater cutting has recently become mainstream as a basic technology for nuclear reactor dismantling, as it is a method suitable for cutting thick plates due to its large thermal energy.
しかし、プラズマトーチと被切断材の間にアー
クを発生させるため、非導電性の付着物がある金
属の切断には不適である。 However, since an arc is generated between the plasma torch and the material to be cut, it is not suitable for cutting metals that have non-conductive deposits.
これに対し、非移行式プラズマジエツト切断で
はプラズマトーチ内の電極棒とノズルの間にアー
クを発生してノズル孔から噴出させて溶融切断す
るもので、表面の影響を受けない。 On the other hand, in non-transfer type plasma jet cutting, an arc is generated between the electrode rod and the nozzle in the plasma torch, and the arc is ejected from the nozzle hole to perform melting and cutting, and is not affected by the surface.
しかし、移行式に比べて切断能力が劣ることか
ら一般にはあまり用いられておらず、特に水中切
断に用いられた事例は見られない。 However, it is generally not used much because it has inferior cutting ability compared to the transition type, and there are no examples of it being used for underwater cutting.
前述のように、非移行式プラズマジエツト切断
は移行式に比べて切断能力が劣るので、非移行式
のみで厚板を切断しようとすると、高出力のプラ
ズマトーチ、電源設備が必要であり、また切断速
度が遅いなど作業効率が悪くなる。そこで、非移
行式プラズマジエツトは、被切断材の表面に付着
した非導電性の皮膜を除去し導電性の内部が露出
するに充分な能力とし、この非移行式プラズマジ
エツトにより表面皮膜を除去しながら、同時に主
たる切断を移行式プラズマアークで行なうように
動作させる。
As mentioned above, non-transfer type plasma jet cutting has inferior cutting ability compared to transition type, so if you try to cut thick plates using only non-transition type, you will need a high-output plasma torch and power supply equipment. Furthermore, the cutting speed is slow, resulting in poor work efficiency. Therefore, the non-transfer type plasma jet has sufficient ability to remove the non-conductive film attached to the surface of the material to be cut and expose the conductive interior, and the non-transfer type plasma jet removes the surface film. While removing, at the same time the main cutting is performed by a transferred plasma arc.
一方、水中切断において、固定した被切断材に
対してプラズマトーチの方を移動して切断した場
合には、被切断材の形状、切断装置の構成により
切断中にプラズマトーチの水深が変化することが
ある。そこで水深を例えば水圧で検出する等の方
法により検知し、切断条件（電流、動作ガス流量
ガス圧など）を水深に応じて調整する。 On the other hand, in underwater cutting, when the plasma torch is moved to cut a fixed workpiece, the water depth of the plasma torch may change during cutting depending on the shape of the workpiece and the configuration of the cutting device. There is. Therefore, the water depth is detected by a method such as water pressure detection, and the cutting conditions (current, operating gas flow rate, gas pressure, etc.) are adjusted according to the water depth.
以下、本発明の一実施例を第１図により説明す
る。プラズマトーチの先端部は図示のように通常
タングステンの電極棒６と水冷銅製のノズル７で
構成され、ノズル孔より動作ガスがガス調整器８
を経由して供給される。ガスの成分としてはアル
ゴン等の不活性ガスの他、水素、窒素、空気或は
これらの混合ガス等が使用される。非移行式プラ
ズマトーチ２では、電極棒６とノズル７の間に直
流電源装置４を接続して非移行式のプラズマジエ
ツトを発生させて被切断材１の表面皮膜を除去す
るもので、移行式プラズマトーチ３では、電極棒
６と被切断材１の間に直流電源装置５を接続して
移行式プラズマアークを発生させて、表面皮膜除
去後の被切断材１を溶融切断することができる。
本図の構成には、水深検知器９が設置されてお
り、制御装置１０から各々の電源４，５及びガス
調整器８に対して指令信号を送ることにより、水
圧の変化に応じた切断条件を制御することが可能
である。
An embodiment of the present invention will be described below with reference to FIG. As shown in the figure, the tip of the plasma torch usually consists of an electrode rod 6 made of tungsten and a nozzle 7 made of water-cooled copper, and the operating gas is supplied from the nozzle hole to a gas regulator 8.
Supplied via. As the gas component, in addition to an inert gas such as argon, hydrogen, nitrogen, air, or a mixed gas thereof may be used. In the non-transfer type plasma torch 2, the DC power supply device 4 is connected between the electrode rod 6 and the nozzle 7 to generate a non-transfer type plasma jet to remove the surface film of the material to be cut 1. In the type plasma torch 3, a DC power supply device 5 is connected between the electrode rod 6 and the material to be cut 1 to generate a transfer type plasma arc, and the material to be cut 1 after the surface film has been removed can be melted and cut. .
In the configuration shown in this figure, a water depth detector 9 is installed, and by sending command signals from a control device 10 to each power source 4, 5 and gas regulator 8, cutting conditions can be set according to changes in water pressure. It is possible to control the
他の実施例を第２図により説明する。本図の構
成では１本の併用プラズマトーチ１１に対して、
各々直流電源装置４，５を接続するもので、非移
行と移行式のプラズマが併用して発生される。こ
のような構成により、前述の実施例と同様に非導
電性の皮膜を有する被切断材１においても、良好
な水中切断が可能である。ここで、第１図と同様
に、水深による切断条件の制御も可能である。 Another embodiment will be explained with reference to FIG. In the configuration shown in this figure, for one combined plasma torch 11,
The DC power supplies 4 and 5 are connected to each other, and non-transfer and transfer type plasmas are generated in combination. With this configuration, it is possible to perform good underwater cutting even on the workpiece 1 having a non-conductive film as in the above-described embodiment. Here, similarly to FIG. 1, it is also possible to control the cutting conditions depending on the water depth.
また、移行式プラズマアークにおいては、被切
断材とトーチとの距離（アーク長）を一定に保持
することが安定な切断能力を確保するための条件
となつているが、併用プラズマトーチ１１におい
ては、電極棒６とノズル７の間に発生した非移行
式プラズマジエツトが噴出しているため、移行式
プラズマアークの発生が維持されやすく切断の安
定性が向上する効果もある。 In addition, in the transfer type plasma arc, maintaining a constant distance (arc length) between the material to be cut and the torch is a condition for ensuring stable cutting ability, but in the combined plasma torch 11, Since the non-transfer type plasma jet generated between the electrode rod 6 and the nozzle 7 is ejected, the generation of the transfer type plasma arc is easily maintained and cutting stability is improved.
両実施例とも、本発明を説明する主要構成部の
みを記述したが、この他、プラズマトーチ或は被
切断材の移動機構、プラズマトーチの防水機構、
冷却機構などを有する。 In both embodiments, only the main components for explaining the present invention have been described, but in addition, the plasma torch or the movement mechanism of the material to be cut, the waterproofing mechanism of the plasma torch,
It has a cooling mechanism, etc.
本発明によれば、被切断材の表面に付着した非
導電性物質を非移行式プラズマジエツトで除去す
ることができるので移行式プラズマアークの発生
が可能となり両者を併用することでそのような皮
膜を有する材料の水中切断においてより厚板への
適用拡大の効果がある。
According to the present invention, non-conductive substances attached to the surface of the material to be cut can be removed using a non-transfer type plasma jet, making it possible to generate a transfer type plasma arc, and by using both together, such a It has the effect of expanding its application to thicker plates in underwater cutting of materials with coatings.
また、水深に応じて切断条件が自動的に調整制
御できるので、切断能力が均一化され作業安定性
向上の効果がある。 In addition, cutting conditions can be automatically adjusted and controlled according to the water depth, making cutting performance uniform and improving work stability.
第１図は本発明の実施例の説明図、第２図は他
の実施例の説明図である。
１……被切断材、２……非移行式プラズマトー
チ、３……移行式プラズマトーチ、４……直流電
源装置、５……直流電源装置、６……電極棒、７
……ノズル、８……ガス調整器、９……水深探知
器、１０……制御装置、１１……併用プラズマト
ーチ。
FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of another embodiment. DESCRIPTION OF SYMBOLS 1... Material to be cut, 2... Non-transfer type plasma torch, 3... Transfer type plasma torch, 4... DC power supply device, 5... DC power supply device, 6... Electrode rod, 7
... Nozzle, 8 ... Gas regulator, 9 ... Depth detector, 10 ... Control device, 11 ... Used plasma torch.
Claims (1)
する高放射性固体廃棄物の切断法において、非移
行式プラズマジエツト発生用の電源装置と移行式
プラズマアーク発生用の電源装置とを別々に備
え、これらの電源装置に接続した一本或いは複数
本のプラズマトーチを用い、前記非移行式プラズ
マジエツト発生用の電源装置により発生したプラ
ズマジエツトにより被切断材の表面皮膜を除去し
ながら、同時に前記移行式プラズマアーク発生用
の電源装置により発生したプラズマアークにより
被切断材を切断分離することを特徴とする高放射
性固体廃棄物の切断法。 ２ 前記プラズマアークによる切断条件を制御装
置により水深に応じて調整することを特徴とする
特許請求の範囲第１項記載の高放射性固体廃棄物
の切断法。 ３ 前記水深を水圧にて検出することを特徴とす
る特許請求の範囲第２項記載の高放射性固体廃棄
物の切断法。[Claims] 1. A method for cutting highly radioactive solid waste in which a material to be cut is cut underwater using a plasma arc, which includes a power supply device for generating a non-transfer type plasma jet and a power supply device for generating a transfer type plasma arc. The surface film of the material to be cut is removed by the plasma jet generated by the non-transfer type plasma jet generation power supply device using one or more plasma torches which are separately equipped with two or more plasma torches and connected to these power supply devices. A method for cutting highly radioactive solid waste, characterized in that, at the same time, a material to be cut is cut and separated by a plasma arc generated by the transfer type plasma arc generation power supply device. 2. The method for cutting highly radioactive solid waste according to claim 1, wherein the cutting conditions by the plasma arc are adjusted according to the water depth by a control device. 3. The method for cutting highly radioactive solid waste according to claim 2, characterized in that the water depth is detected using water pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14303286A JPS632563A (en) | 1986-06-20 | 1986-06-20 | Cutting method for high radiative solid refuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14303286A JPS632563A (en) | 1986-06-20 | 1986-06-20 | Cutting method for high radiative solid refuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS632563A JPS632563A (en) | 1988-01-07 |
| JPH0433541B2 true JPH0433541B2 (en) | 1992-06-03 |
Family
ID=15329321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14303286A Granted JPS632563A (en) | 1986-06-20 | 1986-06-20 | Cutting method for high radiative solid refuse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS632563A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01121334U (en) * | 1988-02-10 | 1989-08-17 | ||
| FR2638671B1 (en) * | 1988-11-10 | 1994-09-23 | Von Laue Paul Langevin Inst Ma | DEVICE AND METHOD FOR CUTTING IRRADIATED PARTS BY PRESSURIZED WATER JET |
| DE102016125599A1 (en) * | 2016-12-23 | 2018-06-28 | Newfrey Llc | Method and device for joining joining elements to components |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57184576A (en) * | 1981-05-07 | 1982-11-13 | Ishikawajima Harima Heavy Ind Co Ltd | Cutting method by plasma arc |
| JPS6012278A (en) * | 1983-07-01 | 1985-01-22 | Japanese National Railways<Jnr> | Cutting method of painted plate |
-
1986
- 1986-06-20 JP JP14303286A patent/JPS632563A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57184576A (en) * | 1981-05-07 | 1982-11-13 | Ishikawajima Harima Heavy Ind Co Ltd | Cutting method by plasma arc |
| JPS6012278A (en) * | 1983-07-01 | 1985-01-22 | Japanese National Railways<Jnr> | Cutting method of painted plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS632563A (en) | 1988-01-07 |
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