JPH10189290A - Plasma torch - Google Patents
Plasma torchInfo
- Publication number
- JPH10189290A JPH10189290A JP8350399A JP35039996A JPH10189290A JP H10189290 A JPH10189290 A JP H10189290A JP 8350399 A JP8350399 A JP 8350399A JP 35039996 A JP35039996 A JP 35039996A JP H10189290 A JPH10189290 A JP H10189290A
- Authority
- JP
- Japan
- Prior art keywords
- cathode tube
- arc
- cooling water
- tube
- attachment point
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プラズマトーチに
関するものであり、より詳しくは、アークの付着点を陰
極筒の軸線方向下流側へと移動させ得るようにしたプラ
ズマトーチに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma torch, and more particularly to a plasma torch capable of moving an attachment point of an arc to a downstream side in an axial direction of a cathode tube.
【０００２】[0002]
【従来の技術】現在、ゴミ焼却炉や溶鉱炉や化学プラン
トや放射性廃棄物溶融炉などの熱源や、ボイラの点火装
置などとして、プラズマトーチが使用されている。2. Description of the Related Art At present, a plasma torch is used as a heat source of a refuse incinerator, a blast furnace, a chemical plant, a radioactive waste melting furnace, or the like, or a boiler ignition device.
【０００３】上記プラズマトーチは、図３に示すような
ものである。The above-mentioned plasma torch is as shown in FIG.
【０００４】即ち、陽極筒１と陰極筒２を間隙を有して
同一軸線上に上流側から順に配設し、陽極筒１の上流側
に上流側ガスマニホールド部材３を配設すると共に、陽
極筒１と陰極筒２との間隙部分に絶縁材製の中間ガスマ
ニホールド部材４を配設する。That is, the anode cylinder 1 and the cathode cylinder 2 are arranged in order from the upstream side on the same axis with a gap, and the upstream gas manifold member 3 is arranged on the upstream side of the anode cylinder 1, An intermediate gas manifold member 4 made of an insulating material is disposed in a gap between the tube 1 and the cathode tube 2.
【０００５】そして、陽極筒１の外周側に絶縁材製のコ
イルボビン５（磁石支持部材）とコイル６とから成る電
磁石などの磁石７を配設してコイルボビン５と陽極筒１
との間に冷却水通路８を形成すると共に、陰極筒２の外
周側に絶縁材製のコイルボビン９（磁石支持部材）とコ
イル１０とから成る電磁石などの磁石１１を配設してコ
イルボビン９と陰極筒２との間に冷却水通路１２を形成
する。A magnet 7 such as an electromagnet including a coil bobbin 5 (magnet support member) made of an insulating material and a coil 6 is disposed on the outer peripheral side of the anode cylinder 1 so that the coil bobbin 5 and the anode cylinder 1
And a magnet 11 such as an electromagnet including a coil bobbin 9 (magnet support member) made of an insulating material and a coil 10 is provided on the outer peripheral side of the cathode tube 2 so that the coil bobbin 9 A cooling water passage 12 is formed between the cooling water passage 12 and the cathode tube 2.
【０００６】又、上流側ガスマニホールド部材３に、前
記冷却水通路８と連通して冷却水１３を供給するための
冷却水通過孔１４を形成すると共に、中間ガスマニホー
ルド部材４に、前記冷却水通路８及び冷却水通路１２と
連通する冷却水通過孔１５を形成する。In addition, a cooling water passage hole 14 for supplying cooling water 13 in communication with the cooling water passage 8 is formed in the upstream gas manifold member 3, and the cooling water passage hole is formed in the intermediate gas manifold member 4. The cooling water passage hole 15 communicating with the passage 8 and the cooling water passage 12 is formed.
【０００７】又、上流側ガスマニホールド部材３、コイ
ルボビン５、中間ガスマニホールド部材４、コイルボビ
ン９の外周側に、ガス通路１６を有して内筒１７を配設
し、上流側ガスマニホールド部材３に形成された、前記
ガス通路１６と連通するガス供給孔１８及びスワール部
材１９を介して、陽極筒１内へ作動ガス２０を噴射させ
得るようにすると共に、中間ガスマニホールド部材４に
形成された、前記ガス通路１６と連通するガス供給孔２
１を介して、陽極筒１と陰極筒２との間隙から内部へ作
動ガス２０を噴射させ得るようにする。An inner cylinder 17 having a gas passage 16 is provided on the outer peripheral side of the upstream gas manifold member 3, the coil bobbin 5, the intermediate gas manifold member 4, and the coil bobbin 9. Through the formed gas supply hole 18 and the swirl member 19 communicating with the gas passage 16, the working gas 20 can be injected into the anode cylinder 1 and formed in the intermediate gas manifold member 4. Gas supply hole 2 communicating with the gas passage 16
The working gas 20 can be injected from the gap between the anode tube 1 and the cathode tube 2 into the inside through the tube 1.
【０００８】更に、内筒１７の外周側に、冷却水戻通路
２２を有して外筒２３を配設し、外筒２３先端と内筒１
７先端とコイルボビン９の先端側と陰極筒２の先端との
間に、これらを支持するエンドキャップ２４を取付け、
エンドキャップ２４に前記冷却水通路１２と冷却水戻通
路２２との間を連通する冷却水通過孔２５を形成する。Further, an outer cylinder 23 having a cooling water return passage 22 is provided on the outer peripheral side of the inner cylinder 17, and a tip of the outer cylinder 23 and the inner cylinder 1 are provided.
An end cap 24 for supporting the tip 7 and the tip of the coil bobbin 9 and the tip of the cathode tube 2 is attached between them,
A cooling water passage hole 25 that communicates between the cooling water passage 12 and the cooling water return passage 22 is formed in the end cap 24.
【０００９】更に又、上流側ガスマニホールド部材３と
外筒２３との間に電源２６を接続する。Further, a power source 26 is connected between the upstream gas manifold member 3 and the outer cylinder 23.
【００１０】尚、２７は、陽極筒１と陰極筒２との間に
発生されるアークである。そしてこの種のプラズマトー
チにおけるアーク２７は半径方向にスポーク状となるの
が一般的であり、２８はそのアーク２７の陰極筒２に対
する付着点、２９はアーク２７によって発生されたプラ
ズマガスである。Reference numeral 27 denotes an arc generated between the anode tube 1 and the cathode tube 2. The arc 27 in this type of plasma torch is generally spoke-shaped in the radial direction. Reference numeral 28 denotes an attachment point of the arc 27 to the cathode tube 2, and reference numeral 29 denotes a plasma gas generated by the arc 27.
【００１１】かかる構成によれば、上流側ガスマニホー
ルド部材３やコイルボビン５や中間ガスマニホールド部
材４やコイルボビン９の外周側と、内筒１７との間に形
成されるガス通路１６に作動ガス２０を供給し、上流側
ガスマニホールド部材３に形成された、前記ガス通路１
６と連通するガス供給孔１８及びスワール部材１９を介
して、陽極筒１内へ作動ガス２０を噴射させると共に、
中間ガスマニホールド部材４に形成された、前記ガス通
路１６と連通するガス供給孔２１を介して、陽極筒１と
陰極筒２との間隙から内部へ作動ガス２０を噴射させ
る。According to this configuration, the working gas 20 is supplied to the gas passage 16 formed between the outer peripheral side of the upstream gas manifold member 3, the coil bobbin 5, the intermediate gas manifold member 4, the coil bobbin 9 and the inner cylinder 17. The gas passage 1 formed in the upstream gas manifold member 3
A working gas 20 is injected into the anode cylinder 1 through a gas supply hole 18 and a swirl member 19 communicating with the tube 6,
The working gas 20 is injected into the inside from the gap between the anode tube 1 and the cathode tube 2 through a gas supply hole 21 formed in the intermediate gas manifold member 4 and communicating with the gas passage 16.
【００１２】この状態で、電源２６により、上流側ガス
マニホールド部材３を介して陽極筒１へ、又、外筒２３
とエンドキャップ２４を介して陰極筒２へ電圧を印加す
ることにより、陽極筒１と陰極筒２との間にアーク２７
を発生させ、アーク２７のエネルギーにより、作動ガス
２０をプラズマ化して陰極筒２の先端からプラズマガス
２９を噴射させる。In this state, the power source 26 connects the anode cylinder 1 to the anode cylinder 1 via the upstream gas manifold member 3 and the outer cylinder 23
By applying a voltage to the cathode tube 2 through the end cap 24 and the end cap 24, an arc 27 is applied between the anode tube 1 and the cathode tube 2.
Is generated, the working gas 20 is turned into plasma by the energy of the arc 27, and the plasma gas 29 is jetted from the tip of the cathode tube 2.
【００１３】この際、上流側ガスマニホールド部材３に
形成された冷却水通過孔１４へ冷却水１３を供給し、冷
却水１３を、コイルボビン９と陰極筒２との間に形成さ
れる冷却水通路１２、中間ガスマニホールド部材４に形
成された冷却水通過孔１５、コイルボビン９と陰極筒２
との間に形成された冷却水通路１２の順に流して陽極筒
１や陰極筒２などを冷却し、これらをアーク２７の熱か
ら保護させるようにする。At this time, cooling water 13 is supplied to a cooling water passage hole 14 formed in the upstream gas manifold member 3, and the cooling water 13 is supplied to a cooling water passage formed between the coil bobbin 9 and the cathode tube 2. 12, a cooling water passage hole 15 formed in the intermediate gas manifold member 4, a coil bobbin 9, and a cathode tube 2.
Then, the anode tube 1 and the cathode tube 2 are cooled by flowing in the order of the cooling water passages 12 formed between them to protect them from the heat of the arc 27.
【００１４】そして、陽極筒１や陰極筒２の外周側に配
置した磁石７，１１によって陽極筒１や陰極筒２の内部
に磁場を発生させ、磁場の作用によってアーク２７に周
方向の力を与えて、陰極筒２に対するアーク２７の付着
点２８を、図４に矢印で示すように、陰極筒２の周方向
へ先に述べた磁場の作用によって移動させるようにし、
これによって陰極筒２のアーク２７による損耗箇所を周
方向へ分散させるようにする。A magnetic field is generated inside the anode tube 1 and the cathode tube 2 by the magnets 7 and 11 arranged on the outer peripheral side of the anode tube 1 and the cathode tube 2, and a circumferential force is applied to the arc 27 by the action of the magnetic field. Then, the attachment point 28 of the arc 27 to the cathode tube 2 is moved in the circumferential direction of the cathode tube 2 by the action of the above-described magnetic field, as shown by an arrow in FIG.
In this way, the portions of the cathode tube 2 worn by the arc 27 are dispersed in the circumferential direction.
【００１５】又、陰極筒２内における作動ガス２０やプ
ラズマガス２９の流れによって、アーク２７の付着点２
８が陰極筒２の周方向へ移動するのが補助されたり、ア
ーク２７の付着点２８が陰極筒２の先端側へ向かって軸
線方向へ移動するのが助長されたりする。Further, the flow of the working gas 20 and the plasma gas 29 in the cathode tube 2 causes
8 is assisted in the circumferential direction of the cathode tube 2, or the attachment point 28 of the arc 27 is assisted in the axial direction toward the tip end of the cathode tube 2.
【００１６】[0016]
【発明が解決しようとする課題】しかしながら、上記し
たプラズマトーチには、以下のような問題があった。However, the above-mentioned plasma torch has the following problems.
【００１７】即ち、アーク２７の陰極筒２に対する付着
点２８は、陰極筒２の損耗を生じさせるので、アーク２
７の付着点２８を、陰極筒２に対して、周方向へ移動さ
せつつ後端側から先端側へと軸線方向へ移動させ、アー
ク２７の付着点２８が陰極筒２の先端側へ達したら、再
び後端側へ戻して上記を繰返させるというようにするの
が、陰極筒２を均一に損耗させて陰極筒２の長寿命化を
図る上では、理想的である。That is, the attachment point 28 of the arc 27 to the cathode tube 2 causes the cathode tube 2 to be worn.
The attachment point 28 of the arc 27 is moved in the axial direction from the rear end side to the tip side while moving in the circumferential direction with respect to the cathode tube 2, and when the attachment point 28 of the arc 27 reaches the tip side of the cathode tube 2. It is ideal to return to the rear end side and repeat the above operation in order to uniformly wear the cathode tube 2 and extend the life of the cathode tube 2.
【００１８】しかるに、実際には、アーク２７の付着点
２８は、陰極筒２の周方向へは移動するが、陰極筒２の
軸線方向へはほとんど移動せずに、陰極筒２の後端側の
狭い範囲で僅かに往復されるに過ぎないのが現状であ
る。In practice, however, the attachment point 28 of the arc 27 moves in the circumferential direction of the cathode tube 2, but hardly moves in the axial direction of the cathode tube 2, and the rear end side of the cathode tube 2 moves. At present, it is only slightly reciprocated within a narrow range.
【００１９】そのため、陰極筒２は、図３に破線イで示
す位置が部分的に損耗されることとなり、結果として、
陰極筒２に孔が開いて冷却水１３が漏れる時期が比較的
早く訪れてしまい、陰極筒２の寿命は短いものとなって
いる。As a result, the position of the cathode tube 2 indicated by the broken line A in FIG. 3 is partially worn, and as a result,
The time when a hole is opened in the cathode tube 2 and the cooling water 13 leaks comes relatively early, and the life of the cathode tube 2 is short.
【００２０】尚、アーク２７の付着点２８が、陰極筒２
の軸線方向へほとんど移動しない原因については、十分
には解明されておらず、現在のところ不明である。The point of attachment 28 of the arc 27 is
The cause of little movement in the axial direction has not been fully elucidated and is currently unknown.
【００２１】本発明は、上述の実情に鑑み、アークの付
着点を陰極筒の軸線方向下流側へと移動させ得るように
したプラズマトーチを提供することを目的とするもので
ある。An object of the present invention is to provide a plasma torch capable of moving an attachment point of an arc to a downstream side in an axial direction of a cathode tube in view of the above situation.
【００２２】[0022]
【課題を解決するための手段】上記課題を解決するため
に、本発明では以下の手段を用いた。Means for Solving the Problems To solve the above problems, the present invention uses the following means.
【００２３】本発明は、同一軸線上の上流側と下流側に
それぞれ配置された陽極筒１と陰極筒２との間にアーク
２７を発生させて、陽極筒１と陰極筒２の内部に供給さ
れた作動ガス２０をプラズマ化し、陰極筒２の下流側端
部からプラズマガス２９として噴射させるようにしたプ
ラズマトーチにおいて、陰極筒２の上流側端部に電流取
出部材を接続したことを特徴とするプラズマトーチにか
かるものである。According to the present invention, an arc 27 is generated between the anode tube 1 and the cathode tube 2 arranged on the same axis on the upstream side and the downstream side, respectively, and supplied to the inside of the anode tube 1 and the cathode tube 2. A current extracting member is connected to the upstream end of the cathode tube 2 in a plasma torch in which the working gas 20 is plasmatized and injected as plasma gas 29 from the downstream end of the cathode tube 2. To a plasma torch.
【００２４】この場合において、電流取出部材が、陰極
筒２の外周部との間に冷却水１３を流すための冷却水通
路１２を形成する冷却水通路形成部材３１であっても良
い。In this case, the current extracting member may be a cooling water passage forming member 31 that forms the cooling water passage 12 for flowing the cooling water 13 between the current extracting member and the outer peripheral portion of the cathode tube 2.
【００２５】上記手段によれば、以下のような作用が得
られる。According to the above means, the following effects can be obtained.
【００２６】陰極筒２の上流側端部に電流取出部材を接
続するようにしたことにより、アーク２７の付着点２８
以降、電流ｉは、陰極筒２の軸線方向上流側へ向かって
流れるようになる。Since the current extracting member is connected to the upstream end of the cathode tube 2, the adhesion point 28 of the arc 27 is
Thereafter, the current i flows toward the axially upstream side of the cathode tube 2.
【００２７】すると、アーク２７の付着点２８の近傍
で、アーク２７や電流ｉが部分的にループ状に流れるよ
うになるので、アーク２７の回りに生じる磁界と電流ｉ
の回りに生じる磁界が相互に強め合って磁場が発生さ
れ、フレミングの左手の法則により、陰極筒２の軸線方
向下流側へ向かうローレンツ力Ｆが発生される。Then, the arc 27 and the current i partially flow in a loop in the vicinity of the attachment point 28 of the arc 27, so that the magnetic field generated around the arc 27 and the current i
A magnetic field generated around the cathode tube reinforces each other to generate a magnetic field, and a Lorentz force F toward the axial direction downstream side of the cathode tube 2 is generated by Fleming's left-hand rule.
【００２８】このローレンツ力Ｆにより、アーク２７の
付着点２８が陰極筒２の軸線方向下流側へと強制的に移
動されることとなる。The Lorentz force F forces the attachment point 28 of the arc 27 to move axially downstream of the cathode tube 2.
【００２９】又、アーク２７の付着点２８が、陰極筒２
の軸線方向下流側の端部まで移動すると、電位差が大き
くなって電源がこれに耐えられなくなるので、アーク２
７の付着点２８は、自然に陰極筒２の軸線方向上流側の
端部へと戻されることになり、以後、アーク２７の付着
点２８は上記軸線方向下流側への移動と軸線方向上流側
の端部への戻りとを繰返すこととなる。The attachment point 28 of the arc 27 is
Move to the end portion on the downstream side in the axial direction, the potential difference becomes large and the power supply cannot withstand this.
The attachment point 28 of the arc 7 is naturally returned to the axially upstream end of the cathode tube 2. Thereafter, the attachment point 28 of the arc 27 is moved to the axially downstream side and the axially upstream side. And the return to the end portion is repeated.
【００３０】このように、本発明によれば、ローレンツ
力Ｆを発生させて、アーク２７の付着点２８を陰極筒２
の軸線方向下流側へと強制的に移動させることができる
ので、陰極筒２を、軸線方向のほぼ全範囲に亘って均一
に損耗させるようにすることが可能となり、結果とし
て、その分だけ陰極筒２の寿命を長くすることが可能と
なる。As described above, according to the present invention, the Lorentz force F is generated, and the attachment point 28 of the arc 27 is moved to the cathode tube 2.
Can be forcibly moved to the downstream side in the axial direction, so that the cathode tube 2 can be worn uniformly over almost the entire range in the axial direction, and as a result, the cathode The life of the cylinder 2 can be extended.
【００３１】[0031]
【発明の実施の形態】以下、本発明の実施の形態を、図
示例と共に説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００３２】図１・図２は、本発明の実施の形態の一例
である。FIGS. 1 and 2 show an embodiment of the present invention.
【００３３】プラズマトーチの基本的な構造について
は、図３と同様であるため、同一の部分については同一
の符号を付すことにより説明を省略する。Since the basic structure of the plasma torch is the same as that of FIG. 3, the same parts are denoted by the same reference numerals and description thereof will be omitted.
【００３４】本発明では、陰極筒２の先端（軸線方向下
流側端部）とエンドキャップ２４との間に絶縁材３０を
介在させて両者を電気的に絶縁させると共に、陰極筒２
に対応する磁石１１における、コイルボビン９（磁石支
持部材）の陰極筒２に面した部分に導電性の冷却水通路
形成部材３１を形成し、冷却水通路形成部材３１の軸線
方向上流側端部に陰極筒２の軸線方向上流側の端部近傍
と接触するフランジ状の上流側通電部３２を設け、且
つ、冷却水通路形成部材３１の軸線方向下流側端部にエ
ンドキャップ２４と接触するフランジ状の下流側通電部
３３を設けるようにする。In the present invention, an insulating material 30 is interposed between the end (the end in the axial direction) of the cathode tube 2 and the end cap 24 to electrically insulate the cathode tube 2 from each other.
A conductive cooling water passage forming member 31 is formed at a portion of the magnet 11 corresponding to the coil bobbin 9 (magnet support member) facing the cathode tube 2, and the cooling water passage forming member 31 is provided at an axially upstream end thereof. A flange-shaped upstream energizing portion 32 is provided in contact with the vicinity of the axially upstream end of the cathode tube 2, and a flange-shaped downstream end of the cooling water passage forming member 31 is in contact with the end cap 24. Is provided.
【００３５】尚、冷却水通路形成部材３１の上流側通電
部３２には、冷却水通過孔３４を形成するようにする。Incidentally, a cooling water passage hole 34 is formed in the upstream side conducting portion 32 of the cooling water passage forming member 31.
【００３６】次に、作動について説明する。Next, the operation will be described.
【００３７】プラズマトーチ自体の作動については図３
の場合と同様なので説明を省略する。The operation of the plasma torch itself is shown in FIG.
The description is omitted because it is the same as the case of
【００３８】本発明では、陰極筒２の先端（軸線方向下
流側端部）とエンドキャップ２４との間に絶縁材３０を
介在させて両者を電気的に絶縁させると共に、陰極筒２
に対応する磁石１１における、コイルボビン９の陰極筒
２に面した部分に、電流取出部材となる導電性の冷却水
通路形成部材３１を形成し、冷却水通路形成部材３１の
軸線方向上流側端部に陰極筒２の軸線方向上流側の端部
近傍と接触するフランジ状の上流側通電部３２を設け、
且つ、冷却水通路形成部材３１の軸線方向下流側端部に
エンドキャップ２４と接触するフランジ状の下流側通電
部３３を設けるようにしているので、アーク２７の付着
点２８以降、電流ｉは、図１に示すように、陰極筒２の
軸線方向上流側へ向かって流れ、陰極筒２の軸線方向上
流側から、上流側通電部３２、冷却水通路形成部材３
１、下流側通電部３３を介してエンドキャップ２４へ入
り、エンドキャップ２４から外筒２３を介して電源２６
へ戻されるようになる。In the present invention, an insulating material 30 is interposed between the end (the end in the axial direction) of the cathode tube 2 and the end cap 24 to electrically insulate the cathode tube 2 from each other.
A conductive cooling water passage forming member 31 serving as a current extracting member is formed in a portion of the magnet 11 corresponding to the coil bobbin 9 facing the cathode tube 2, and an axially upstream end of the cooling water passage forming member 31. A flange-shaped upstream-side current-carrying portion 32 that comes into contact with the vicinity of the axially upstream end of the cathode tube 2;
In addition, since the downstream end of the cooling water passage forming member 31 in the axial direction is provided with the flange-shaped downstream energizing portion 33 that comes into contact with the end cap 24, the current i after the attachment point 28 of the arc 27 becomes As shown in FIG. 1, the air flows toward the upstream side in the axial direction of the cathode tube 2, and from the upstream side in the axial direction of the cathode tube 2, the upstream-side conducting portion 32 and the cooling water passage forming member 3
1. The end cap 24 enters the end cap 24 via the downstream energizing section 33, and the power supply 26
Will be returned to.
【００３９】すると、上述したように、アーク２７の付
着点２８は周方向へ移動しつつアーク２７の付着点２８
の近傍で、アーク２７や電流ｉが部分的にループ状に流
れるようになるので、図２に示すように、アーク２７の
回りに生じる磁界と電流ｉの回りに生じる磁界が相互に
強め合って紙面と直角方向の磁場が発生され、フレミン
グの左手の法則により、図１に示すように、陰極筒２の
軸線方向下流側へ向かうローレンツ力Ｆが発生される。Then, as described above, the attachment point 28 of the arc 27 moves while moving in the circumferential direction.
, The arc 27 and the current i flow partially in a loop, and as shown in FIG. 2, the magnetic field generated around the arc 27 and the magnetic field generated around the current i reinforce each other. A magnetic field is generated in a direction perpendicular to the plane of the paper, and a Lorentz force F is generated toward the downstream side in the axial direction of the cathode tube 2 according to Fleming's left-hand rule, as shown in FIG.
【００４０】このローレンツ力Ｆにより、アーク２７の
付着点２８が陰極筒２の軸線方向下流側へと強制的に移
動されることとなる。The Lorentz force F forcibly moves the attachment point 28 of the arc 27 to the axially downstream side of the cathode tube 2.
【００４１】因みに、図３の場合には、アーク２７の付
着点２８以降、電流ｉは、陰極筒２の軸線方向下流側へ
向かって流れることとなるので、図５に示すように、ア
ーク２７の回りに生じる磁界と電流ｉの回りに生じる磁
界が相互に打ち消し合う傾向となるので、ローレンツ力
Ｆを発生させるような磁場は発生されない。Incidentally, in the case of FIG. 3, the current i flows downstream of the cathode tube 2 in the axial direction after the point of attachment of the arc 27, so that as shown in FIG. And the magnetic field generated around the current i tend to cancel each other out, so that a magnetic field that generates the Lorentz force F is not generated.
【００４２】又、アーク２７の付着点２８が、陰極筒２
の軸線方向下流側の端部まで移動すると、電位差が大き
くなって電源２６がこれに耐えられなくなるので、アー
ク２７の付着点２８は、自然に陰極筒２の軸線方向上流
側の端部へと戻されることになり、以後、アーク２７の
付着点２８は上記軸線方向下流側への移動と軸線方向上
流側の端部への戻りとを繰返すこととなる。The point of attachment 28 of the arc 27 is
Move to the end portion on the downstream side in the axial direction, the potential difference becomes large and the power supply 26 cannot withstand this. Therefore, the attachment point 28 of the arc 27 naturally moves to the end portion on the upstream side in the axial direction of the cathode tube 2. Thereafter, the attachment point 28 of the arc 27 repeats the movement to the downstream side in the axial direction and the return to the end on the upstream side in the axial direction.
【００４３】このように、本発明によれば、ローレンツ
力Ｆを発生させて、アーク２７の付着点２８を陰極筒２
の軸線方向下流側へと強制的に移動させることができる
ので、陰極筒２を軸線方向のほぼ全範囲に亘って均一に
損耗させるようにすることが可能となり、結果として、
その分だけ陰極筒２の寿命を長くすることが可能とな
る。As described above, according to the present invention, the Lorentz force F is generated, and the attachment point 28 of the arc 27 is moved to the cathode tube 2.
Can be forcibly moved to the downstream side in the axial direction, so that the cathode tube 2 can be worn uniformly over almost the entire range in the axial direction, and as a result,
The life of the cathode tube 2 can be prolonged accordingly.
【００４４】尚、本発明は、上述の実施の形態にのみ限
定されるものではなく、本発明の要旨を逸脱しない範囲
内において種々変更を加え得ることは勿論である。It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the spirit of the present invention.
【００４５】[0045]
【発明の効果】以上説明したように、本発明のプラズマ
トーチによれば、アークの付着点を陰極筒の軸線方向下
流側へと移動させることができるという優れた効果を奏
し得る。As described above, according to the plasma torch of the present invention, an excellent effect that the point of attachment of the arc can be moved downstream in the axial direction of the cathode tube can be obtained.
【図１】本発明の実施の形態の一例の概略側方断面図で
ある。FIG. 1 is a schematic side sectional view of an example of an embodiment of the present invention.
【図２】図１のＩＩ部分拡大図である。FIG. 2 is an enlarged view of a part II of FIG. 1;
【図３】従来例の概略側方断面図である。FIG. 3 is a schematic side sectional view of a conventional example.
【図４】アークの付着点が陰極筒の周方向に移動する状
態を示す図である。FIG. 4 is a diagram showing a state in which an arc attachment point moves in a circumferential direction of a cathode tube.
【図５】図３の場合の図２と同様の図である。FIG. 5 is a view similar to FIG. 2 in the case of FIG. 3;
１ 陽極筒 ２ 陰極筒 １２ 冷却水通路 １３ 冷却水 ２０ 作動ガス ２７ アーク ２９ プラズマガス ３１ 冷却水通路形成部材（電流取出部材） DESCRIPTION OF SYMBOLS 1 Anode tube 2 Cathode tube 12 Cooling water passage 13 Cooling water 20 Working gas 27 Arc 29 Plasma gas 31 Cooling water passage forming member (current extracting member)
Claims (2)
配置された陽極筒（１）と陰極筒（２）との間にアーク
（２７）を発生させて、陽極筒（１）と陰極筒（２）の
内部に供給された作動ガス（２０）をプラズマ化し、陰
極筒（２）の下流側端部からプラズマガス（２９）とし
て噴射させるようにしたプラズマトーチにおいて、陰極
筒（２）の上流側端部に電流取出部材を接続したことを
特徴とするプラズマトーチ。An arc (27) is generated between an anode tube (1) and a cathode tube (2) arranged on the same axis on the upstream side and the downstream side, respectively, so that the anode tube (1) and the cathode In a plasma torch in which the working gas (20) supplied to the inside of the tube (2) is turned into plasma and injected as a plasma gas (29) from the downstream end of the cathode tube (2), the cathode tube (2) A current torch member is connected to an upstream end of the plasma torch.
との間に冷却水（１３）を流すための冷却水通路（１
２）を形成する冷却水通路形成部材（３１）である請求
項１記載のプラズマトーチ。2. A cooling water passage (1) for flowing cooling water (13) between the current extracting member and an outer peripheral portion of the cathode tube (2).
The plasma torch according to claim 1, which is a cooling water passage forming member (31) forming (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8350399A JPH10189290A (en) | 1996-12-27 | 1996-12-27 | Plasma torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8350399A JPH10189290A (en) | 1996-12-27 | 1996-12-27 | Plasma torch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10189290A true JPH10189290A (en) | 1998-07-21 |
Family
ID=18410236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8350399A Pending JPH10189290A (en) | 1996-12-27 | 1996-12-27 | Plasma torch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10189290A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980025483A (en) * | 1996-10-01 | 1998-07-15 | 이대원 | Steam Plasma Tochigi |
| JP2011222502A (en) * | 2007-09-20 | 2011-11-04 | Posco | Plasma torch device |
| JP2013235833A (en) * | 2012-05-07 | 2013-11-21 | Gs Platech Co Ltd | Non-transfer type hollow plasma torch |
| CN104039064A (en) * | 2013-03-04 | 2014-09-10 | Gs普兰斯特有限公司 | Non-transferred and hollow type plasma torch |
| CN104202900B (en) * | 2012-08-19 | 2016-05-04 | 衢州昀睿工业设计有限公司 | A kind of interior arc plasma gun that adds thermal decomposition purposes |
| CN113905498A (en) * | 2021-08-31 | 2022-01-07 | 中国航天空气动力技术研究院 | Arc plasma heater with dispersed cathode arc roots and use method |
-
1996
- 1996-12-27 JP JP8350399A patent/JPH10189290A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980025483A (en) * | 1996-10-01 | 1998-07-15 | 이대원 | Steam Plasma Tochigi |
| JP2011222502A (en) * | 2007-09-20 | 2011-11-04 | Posco | Plasma torch device |
| JP2013235833A (en) * | 2012-05-07 | 2013-11-21 | Gs Platech Co Ltd | Non-transfer type hollow plasma torch |
| CN104202900B (en) * | 2012-08-19 | 2016-05-04 | 衢州昀睿工业设计有限公司 | A kind of interior arc plasma gun that adds thermal decomposition purposes |
| CN104039064A (en) * | 2013-03-04 | 2014-09-10 | Gs普兰斯特有限公司 | Non-transferred and hollow type plasma torch |
| JP2014170743A (en) * | 2013-03-04 | 2014-09-18 | Gs Platech Co Ltd | Non-transferred and hollow type plasma torch |
| CN113905498A (en) * | 2021-08-31 | 2022-01-07 | 中国航天空气动力技术研究院 | Arc plasma heater with dispersed cathode arc roots and use method |
| CN113905498B (en) * | 2021-08-31 | 2024-04-09 | 中国航天空气动力技术研究院 | Arc plasma heater with dispersed cathode arc roots and use method |
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