JPS6168900A - Method of igniting plasma torch - Google Patents

Method of igniting plasma torch

Info

Publication number
JPS6168900A
JPS6168900A JP10442084A JP10442084A JPS6168900A JP S6168900 A JPS6168900 A JP S6168900A JP 10442084 A JP10442084 A JP 10442084A JP 10442084 A JP10442084 A JP 10442084A JP S6168900 A JPS6168900 A JP S6168900A
Authority
JP
Japan
Prior art keywords
tube
end surface
core gas
plasma torch
open end
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.)
Granted
Application number
JP10442084A
Other languages
Japanese (ja)
Other versions
JPH0510800B2 (en
Inventor
小泉 忠司
岩田 敬
横田 誠二
好明 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Neturen Co Ltd
Original Assignee
Neturen Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Neturen Co Ltd filed Critical Neturen Co Ltd
Priority to JP10442084A priority Critical patent/JPS6168900A/en
Publication of JPS6168900A publication Critical patent/JPS6168900A/en
Publication of JPH0510800B2 publication Critical patent/JPH0510800B2/ja
Granted legal-status Critical Current

Links

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) 本発明はプラズマトーチの着火方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method of igniting a plasma torch.

(従来技術) チャンバーに一方端面が開口する管体の他方端面側から
管内に所定のコアガスを注入し、チャンパーに近接する
管体の外周に巻回した誘導コイルに高周波電源からの電
流を通電して高周波エネルギーを発生させ、当該高周波
エネルギーによって管内のコアガスを高温度の電離ガス
、即ちプラズマファイヤとし、当該プラズマファイヤを
チャンバー内に導いて各種の作用を行わせるようにした
プラズマトーチは公知である。
(Prior art) A predetermined core gas is injected into the tube from the other end of the tube whose one end opens into the chamber, and a current from a high-frequency power source is applied to an induction coil wound around the outer circumference of the tube near the chamber. There are known plasma torches in which high-frequency energy is generated, the core gas in the tube is turned into high-temperature ionized gas, ie, plasma fire, and the plasma fire is guided into a chamber to perform various actions. .

上記プラズマトーチの1例とその着火方法として従来か
ら広く行われている接地炭素棒方式とを第3図に従って
説明する。
An example of the above-mentioned plasma torch and its ignition method using a grounded carbon rod method, which has been widely used in the past, will be explained with reference to FIG.

第3図において、1′はプラズマトーチであって、例え
ば耐熱性のある石英管等を用いた大径の外管101と小
径ρ内管102とからなる二重管および高周波誘導コイ
ルC(以下コイルと称す)で構成されている。上記外管
101は一方端面を閉端面に、他方端面を開端面に形成
されていて、開端面が例えばチャ/パーah内に開口す
る。上記内管102は一方端面を閉端面に、他方端面を
開端面に形成されていて、上記外管101の閉端面を貫
通して閉端面方向一部が外管101外にあシ、開端面方
向所定長ざが外管101内にあって、管内の所定中間位
置に開口する如く同心状に配設されている。上記コイル
Cは上記内管102が外管101内で開口する位置に近
接した外管101外周に巻回されていて、図示しない高
周波電源に接続されている。外管101および内管10
2それぞれの閉端面近傍には導管が開口しており、内管
102へは所定のコアガスamを、また外管101へは
例えば上記コアガスG!と同質の管壁冷却用ガスG!を
注入可能に設定されている。
In FIG. 3, reference numeral 1' denotes a plasma torch, which includes a double-tube consisting of a large-diameter outer tube 101 and a small-diameter ρ inner tube 102 made of, for example, a heat-resistant quartz tube, and a high-frequency induction coil C (hereinafter referred to as (referred to as a coil). The outer tube 101 has one end surface formed as a closed end surface and the other end surface as an open end surface, and the open end surface opens, for example, in a cha/par ah. The inner tube 102 has one end surface formed as a closed end surface and the other end surface formed as an open end surface. A predetermined length in the direction is provided within the outer tube 101 and is arranged concentrically so as to open at a predetermined intermediate position within the tube. The coil C is wound around the outer circumference of the outer tube 101 near the position where the inner tube 102 opens in the outer tube 101, and is connected to a high frequency power source (not shown). Outer tube 101 and inner tube 10
A conduit is opened near the closed end surface of each of 2, and a predetermined core gas am is supplied to the inner tube 102, and the core gas G!, for example, is supplied to the outer tube 101. Pipe wall cooling gas of the same quality as G! is set to be injectable.

図中の2および201はプラズマトーチ1′の従来着火
装置を構成する炭素棒および炭素棒保持管である。炭素
棒2は上記内管102の閉端面を貫通する保持管201
に−1側部分を嵌入され、他方側部分を内管102の軸
線にそって伸延してその先端がほぼ開口端面にまで達す
るように装着される。また炭素棒2の保持管201内の
端面には導電線202が接続されていて接地となってい
る。
Reference numerals 2 and 201 in the figure are a carbon rod and a carbon rod holding tube that constitute a conventional ignition device of the plasma torch 1'. The carbon rod 2 is a holding tube 201 that passes through the closed end surface of the inner tube 102.
The -1 side part is inserted into the inner tube 102, and the other side part is extended along the axis of the inner tube 102 so that its tip reaches almost the open end surface. Further, a conductive wire 202 is connected to the end face of the carbon rod 2 inside the holding tube 201 to be grounded.

上記接地炭素棒方式の着火理論では、コアガスGlが内
管102に注入されつつある状態でコイルCに高周波電
流の通電を開始すると、コイルCから発生する磁束によ
って炭素棒2に渦電流が誘起されて発熱し、加熱された
炭素棒2がこれにそって流れるコアガスG1の電離を促
進するとともに、接地されて低電位の炭素棒2と高電位
のコイルCとの間に生ずる半径方向の電界によって火花
電圧・・・無声放電開始電圧を生じコアガスG1が着火
されるとする。
According to the above-mentioned ignition theory of the grounded carbon rod method, when a high-frequency current is started to flow through the coil C while the core gas Gl is being injected into the inner tube 102, an eddy current is induced in the carbon rod 2 by the magnetic flux generated from the coil C. The heated carbon rod 2 promotes ionization of the core gas G1 flowing along it, and the radial electric field generated between the grounded carbon rod 2, which is at a low potential, and the coil C, which is at a high potential. Spark voltage: It is assumed that a silent discharge starting voltage is generated and the core gas G1 is ignited.

(発明が解決しようとする問題点) ところで、上記従来接地炭素棒方式では炭素棒2は保持
管201に嵌着固定されていて、着火後も先端が高周波
エネルギー領域内に定置状態を維持しているため、プラ
ズマファイヤPのヘッドと常に接触を保つので炭素成分
がプラズマ中に溶出混入して、コアガスGl成分のみか
らなる純度の高いプラズマファイヤPを得ることが困難
であった。
(Problems to be Solved by the Invention) By the way, in the conventional grounded carbon rod method described above, the carbon rod 2 is fitted and fixed in the holding tube 201, and even after ignition, the tip remains stationary within the high frequency energy region. Since the head of the plasma fire P is always kept in contact with the head of the plasma fire P, carbon components are eluted and mixed into the plasma, making it difficult to obtain a highly pure plasma fire P consisting only of the core gas Gl component.

(発明の目的) 本発明は純度の高いプラズマファイヤを得ることを目的
としてなされた研究実験から得られた成果であって、従
来接地炭素棒方式とは異る新規なプラズマトーチの着火
方法を提供するものである。
(Object of the invention) The present invention is a result obtained from research experiments conducted with the aim of obtaining a plasma fire of high purity, and provides a novel plasma torch ignition method different from the conventional grounded carbon rod method. It is something to do.

(発明の技術思想) 本願第1発明は発明の基本的技術思想を開示するもので
あって、 (l−1) 管体の所定領域外周に巻回した高周波誘導
コイルから発生する高周波エネルギーを管体内へ注入さ
れるコアガスに付与して高温プラズマファイヤを得るプ
ラズマトーチを着火するに際し、 (1−2)  最初に管体内を所定の減圧状態として付
与される高周波エネルギーによりグロー放電を発生せし
め、 (1−3)  ついで管体内へコアガスを序々に注入し
て上記グロー放電を高温プラズマファイヤに変換するよ
うにした ことを特徴とするプラズマトーチの着火方法である。
(Technical Idea of the Invention) The first invention of the present application discloses the basic technical idea of the invention, which includes: When igniting a plasma torch that obtains a high-temperature plasma fire by applying it to the core gas injected into the body, (1-2) First, a glow discharge is generated by the high-frequency energy applied to the inside of the tube to a predetermined reduced pressure state, ( 1-3) A method for igniting a plasma torch, characterized in that a core gas is then gradually injected into the tube to convert the glow discharge into high-temperature plasma fire.

而して、上記第1発明の技術思想を実現する具体的な着
火方法を示す本願第2発明の要旨は、(2−1)  一
方端を閉端面とし他方端をチャンバー内に開口する開端
面とした管体の所定領域外周に巻回した高周波コイルか
ら発生する高周波エネルギーを管体内へ注入されるコア
ガスに付与して高温プラズマファイヤを得るプラズマト
ーチにおいて、 (2−2)  上記管体内に管路を接続する真空排気装
置を設けるとともに、 (2−3)  管体の開端面に当接してこれを閉成可能
な蓋部材を常時常圧を維持するチャンバー内に設け、 (2−4)  当該蓋部材がチャンノ9−内と管体内と
の圧力差によって開端面に吸着またはこれから解離可能
に構成し、 (2−5)  着火時にはコアガスの注入が停止されて
いる管体の閉端面に蓋部材を当接のうえ真空排気装置を
駆動させて所定減圧状態となった管体内に高周波エネル
ギーによってグロー放電を発生せしめ、 (2−6)  ついで管内へコアガスを序々に注入して
上記グロー放電を高温プラズマファイヤに変換し、 (2−7)  同時に常圧に近づいた管体の開端面から
蓋部材が自重によシ解離するようにした ことを特徴とするプラズマトーチの着火方法におる。
Therefore, the gist of the second invention of the present application, which shows a specific ignition method for realizing the technical concept of the first invention, is as follows: (2-1) An open end surface in which one end is a closed end surface and the other end is open into a chamber. (2-2) In a plasma torch that generates a high-temperature plasma fire by imparting high-frequency energy generated from a high-frequency coil wound around the outer periphery of a predetermined area of a tube body to a core gas injected into the tube body, (2-2) (2-3) A lid member capable of contacting and closing the open end surface of the tube body is provided in the chamber that maintains normal pressure at all times; (2-4) The lid member is configured to be capable of adhering to or detaching from the open end face due to the pressure difference between the inside of the channel 9 and the pipe body, and (2-5) the lid member is attached to the closed end face of the pipe body where injection of core gas is stopped at the time of ignition. After the members are brought into contact, a vacuum evacuation device is driven to generate a glow discharge using high-frequency energy inside the tube, which has reached a predetermined reduced pressure state. (2-6) Next, core gas is gradually injected into the tube to generate the glow discharge. (2-7) A method for igniting a plasma torch, characterized in that the lid member is dissociated by its own weight from the open end surface of the tube body which has simultaneously reached normal pressure.

(実施例の構成) 上記本願第2発明を第1図〜第2図(d)に示す実施例
に従ってさらに詳述する。
(Configuration of Example) The second invention of the present application will be further described in detail according to the example shown in FIGS. 1 to 2(d).

第1図において、1Viプラズマト一チ全体を示し、1
01および102は耐熱性のある石英管等を用いた大径
の外管および小径の内管であって、上記外管101の1
方端は閉端面としてチャンバーah外に、他方端は開端
面としてチャンバー内h内に開口し、上記内管102の
一方端は閉端面として外管101外に、他方端は開端面
として外管101の閉端面を貫通して管内所定位置まで
伸延した二重管体となってお)、また上記外管101の
チャンバーchに近接した所定領域外周にはコイルCが
巻回されており、外管101および内管102それぞれ
の閉端面近傍にはコアガスG1および例えばコアガスG
In FIG. 1, the entire 1Vi plasma torch is shown.
01 and 102 are a large-diameter outer tube and a small-diameter inner tube made of heat-resistant quartz tube, etc., and 1 of the outer tube 101 is
One end is opened outside the chamber ah as a closed end surface, and the other end is opened inside the chamber h as an open end surface, one end of the inner tube 102 is opened outside the outer tube 101 as a closed end surface, and the other end is opened as an open end surface. The coil C is wound around the outer periphery of a predetermined region of the outer tube 101 near the chamber channel. Core gas G1 and, for example, core gas G are provided near the closed end surfaces of the tube 101 and the inner tube 102.
.

と同質の管壁冷却用ガスG、をそれぞれの管内に注入可
能に設定されているのは前記従来着火方法の説明で述べ
たプラズマトーチ1/と同様である。
Similar to the plasma torch 1/ described in the description of the conventional ignition method, the configuration is such that a tube wall cooling gas G of the same quality as the plasma torch 1 can be injected into each tube.

しかし本発明では第3図に2として示す着火用の接地炭
素棒は用いない。
However, in the present invention, the grounded carbon rod shown as 2 in FIG. 3 for ignition is not used.

図において、3はコアガスG1の供給源であって、例え
ば可変流量弁V!を介して内管102ヘコアガスG、を
注入可能に管路31が、また上記可変流量弁Vtおよび
同じく可変流量弁であるV2を介して外管101へ管壁
冷却用ガスG2を注入可能に管路32がそれぞれ配設さ
れている。4は例えば油回転ポンプからなる真空排気装
置であって、当該真空排気装[4は弁Vsを介して管路
31に接続されている。5はチャンバー内h内に設けら
れている蓋部材であって、例えばセラミックあるいは耐
熱金属等を使用した、外管101の開口端面よシ大なる
板材で、その表面が平坦鏡面仕上げとされ、同じく平坦
鏡面仕上げとされた外管101の開端面管線に当接して
これを閉成可能である。当該蓋部材5は例えばチャンバ
ーahの側壁を貫通して図示矢印@ 441)の如く水
平移動可能で、その先端がa方向へ変位すると外管10
1の開端面近傍まで到達する可動板51の先端面と、第
2図(&)に示される如く、その所定辺を蝶番接続52
されている。可動板51の裏面には保持愈531および
532が設けられていて、当該保持鎖531.532に
保持される蓋支承棒54がチャンバーahの内外にわた
シ可動板51にそって配置される。当該蓋支承棒54は
可動板51とは個別に矢印a’4−+b’として示す如
く可動板51の裏面を摺動可能であり、3′方向への変
位によってその先端部が可動板51の先端よυ突出して
、その前方に蝶番接続52された蓋部材5を第1図およ
び第2図(、)の如く水平に支承して外管101の開端
面に当接可能、またb′方向への変位によってその先端
部が可動板51の先端よシ引込み、その前方に蝶番接続
52された蓋部材5を第2図(C)に示す如く下垂せし
めることが可能である。また可動板51のb方向への変
位により上記下垂状態の蓋部材5を第2図(d)に示す
如くチャンバー側壁まで退避せしめることができる。同
511は可動板51上に設けられた位置決め兼用ストッ
パー、また541は蓋支承棒54の先端に設けたストッ
パーである。
In the figure, 3 is a supply source of core gas G1, for example, a variable flow valve V! The pipe line 31 allows the core gas G to be injected into the inner pipe 102 through the pipe line 31, and the pipe line 31 allows the pipe wall cooling gas G2 to be injected into the outer pipe 101 via the variable flow valve Vt and V2, which is also a variable flow valve. A respective channel 32 is provided. Reference numeral 4 denotes a vacuum evacuation device consisting of, for example, an oil rotary pump, and the evacuation device [4 is connected to the pipe line 31 via a valve Vs. Reference numeral 5 denotes a lid member provided inside the chamber h, which is a plate material made of, for example, ceramic or heat-resistant metal, and is larger than the opening end surface of the outer tube 101, and its surface is finished with a flat mirror finish. It is possible to close the open end surface of the outer tube 101, which has a flat mirror finish, by coming into contact with the tube line. For example, the lid member 5 can penetrate the side wall of the chamber ah and move horizontally as shown by the arrow @ 441), and when its tip is displaced in the direction a, the outer tube 10
As shown in FIG.
has been done. Holding rods 531 and 532 are provided on the back surface of the movable plate 51, and the lid support rod 54 held by the holding chains 531 and 532 is arranged along the movable plate 51 inside and outside the chamber ah. The lid support rod 54 can slide on the back surface of the movable plate 51 as shown by the arrow a'4-+b' separately from the movable plate 51, and its tip portion touches the movable plate 51 by displacement in the 3' direction. The lid member 5, which protrudes from the tip υ and is hinged 52 in front thereof, can be supported horizontally as shown in FIGS. When the movable plate 51 is displaced, the distal end thereof is retracted from the distal end of the movable plate 51, and the lid member 5, which is hinged 52 in front of the movable plate 51, can be made to hang down as shown in FIG. 2(C). Further, by displacing the movable plate 51 in the direction b, the lid member 5 in the hanging state can be retracted to the side wall of the chamber as shown in FIG. 2(d). 511 is a positioning stopper provided on the movable plate 51, and 541 is a stopper provided at the tip of the lid support rod 54.

(実施例の作用) 上記の構成からなる本発明実施例によってプラズマトー
チ1を着火する場合を第2図(、)〜(d)に従って以
下に述べる。
(Operation of the Embodiment) The case of igniting the plasma torch 1 according to the embodiment of the present invention having the above-described configuration will be described below with reference to FIGS. 2(,) to 2(d).

まず、可変流量弁v1およびv2それぞれを閉成とし、
プラズマトーチ1内にはコアガスG。
First, variable flow valves v1 and v2 are each closed,
Core gas G is inside plasma torch 1.

および管壁冷却用ガスG2が注入されない状態となし、
可動板51および蓋支承棒54をそれぞれaおよびa′
方向へ変位せしめる。これによりチャンバーah内の蓋
部材5は第2図(、)に示される如く当該チャンバーa
h内に開口する外管101の開端面に当妥した状態とな
る。次に弁v3を開成して真空排気装置4を駆動する。
and a state in which no pipe wall cooling gas G2 is injected,
The movable plate 51 and the lid support rod 54 are respectively a and a'.
displacement in the direction. As a result, the lid member 5 in the chamber ah is opened in the chamber a as shown in FIG.
The state corresponds to the open end surface of the outer tube 101 which opens into the inside h. Next, the valve v3 is opened and the evacuation device 4 is driven.

これによりプラズマトーチ1の管体内のガス(この場合
のガスはコアガスG1であっても、あるいは空気であっ
ても同等支障はない)は急速に排出され、常圧を維持し
ているチャンバーah内よシも減圧されるので、蓋部材
5は当接している外管101の開端面に吸着状態となる
As a result, the gas inside the tube of the plasma torch 1 (in this case, the gas may be core gas G1 or air, there is no problem) is rapidly exhausted, and the gas inside the chamber ah, which maintains normal pressure, is discharged. Since the pressure is also reduced, the lid member 5 is attracted to the open end surface of the outer tube 101 that it is in contact with.

次に蓋支承棒54をb′方向へ変位せしめる。Next, the lid support rod 54 is displaced in the b' direction.

蓋部材5は上記したとおシ外管101の開端面に吸着さ
れているので第2図(b)に示す状態が維持される。プ
ラズマトーチ1内の排気が進み所定減圧状態、例えば1
0 torr以下となった時点でコイルCへの通電を開
始する。外管101内の所定領域・・・高周波エネルギ
ー領域には直ちにグロー放電が発生する。この状態にお
いて弁vsの閉成と真空排気装置4の駆動停止を行い、
替つてコアガス供給源3に接続する可変流量弁7里を流
量が序々に犬となる如く操作しつつ開成とする。コアガ
スG1は管路31を介して内管102へ流入し、その開
端面から外管101内に発生しているグロー放電領域へ
序々に注入される。低温のグロー放電領域では注入され
るコアガスGKによって序々に増加する分子が付与され
る高周波エネルギによシ励起されて活発に運動し、衝突
が次第に激しくなシミ離状態へ突入するためと思われる
が、順次温度が高まってゆき、グロー放電は高温のプラ
ズマP!へと変換される。高温プラズマP1への移行圧
力は定かではないが500 torr前後と推定される
。グロー放電が高温プラズマ化すると間もなく、プラズ
マトーチ1内のガス圧が常圧に近づくので、これまで外
管101の開端面に吸着状態を維持していた蓋部材5は
自重によって解離し、第2図(C)に示される状態とな
る。この状態となったら直ちに可動板51および蓋支承
棒54をそれぞれb−b’方向へ移動して第2図(d)
に示す如く蓋部材5をチャンバーchの側壁へと退避さ
せ、同時に可変流量弁v2を開成かつvIを所定全開流
量に調整して適正なプラズマ7アイヤPとなし、プラズ
マトーチ1の着火操作を終夛、チャンバーah内での処
理工程の実行が可能となる。
Since the lid member 5 is attracted to the open end surface of the outer tube 101 as described above, the state shown in FIG. 2(b) is maintained. The exhaust inside the plasma torch 1 progresses to a predetermined depressurized state, for example 1
When the temperature becomes 0 torr or less, energization to the coil C is started. A glow discharge immediately occurs in a predetermined region within the outer tube 101, that is, a high frequency energy region. In this state, close the valve vs and stop driving the evacuation device 4,
Instead, the variable flow valve 7 connected to the core gas supply source 3 is opened while being operated so that the flow rate gradually increases. The core gas G1 flows into the inner tube 102 through the conduit 31, and is gradually injected into the glow discharge region generated in the outer tube 101 from its open end surface. This seems to be because in the low-temperature glow discharge region, molecules that gradually increase due to the injected core gas GK are excited by the high-frequency energy imparted and move actively, entering a state where collisions become increasingly violent. , the temperature gradually increases, and the glow discharge becomes a high-temperature plasma P! is converted into. The transition pressure to high-temperature plasma P1 is not certain, but it is estimated to be around 500 torr. Immediately after the glow discharge turns into high-temperature plasma, the gas pressure inside the plasma torch 1 approaches normal pressure, so the lid member 5, which had been adsorbed to the open end surface of the outer tube 101, dissociates due to its own weight, and the second The state shown in Figure (C) is reached. Immediately after reaching this state, move the movable plate 51 and the lid support rod 54 in the b-b' direction, respectively, as shown in FIG. 2(d).
As shown in the figure, the lid member 5 is retracted to the side wall of the chamber channel, and at the same time, the variable flow valve v2 is opened and vI is adjusted to a predetermined fully open flow rate to obtain an appropriate plasma 7-year P, and the ignition operation of the plasma torch 1 is completed. Furthermore, it becomes possible to carry out processing steps within the chamber ah.

上記着火操作はプラズマトーチ1の大きさやコイルco
整合状態によって多少の差は生ずるが極めて短時間で完
了する。殊にグロー放電の開始から高温プラズマへの変
換までに要する時間は、整合が良好でコアガスG1の流
量調整が最適ならば、数秒ですむ。また外管101の開
端面を閉成する蓋部材5と初期高温プラズマPK発生位
置との間隔を所定の如く設定しておけば、蓋部材5には
高温プラズマP1が直接当らないので、加熱昇温温度が
余り高温にはならず、コアガスGlのみによる高温プラ
ズマP1が保持され、ついで蓋部材5の落下と退避とに
よってプラズマファイヤPの純度も保証される。
The above ignition operation depends on the size of the plasma torch 1 and the coil co.
Although there will be some differences depending on the matching state, it will be completed in an extremely short time. In particular, the time required from the start of the glow discharge to the conversion to high-temperature plasma can be a few seconds if the matching is good and the flow rate adjustment of the core gas G1 is optimal. Furthermore, if the distance between the lid member 5 that closes the open end surface of the outer tube 101 and the initial high temperature plasma PK generation position is set as specified, the high temperature plasma P1 will not directly hit the lid member 5, so that the heating will increase. The temperature does not become too high, the high temperature plasma P1 is maintained only by the core gas Gl, and the purity of the plasma fire P is also guaranteed by dropping and retracting the lid member 5.

(他の実施例) 上記実施例では蓋部材5としてセラミック板や耐熱性の
ある金属板材を挙げ、かつ可動板51や蓋支承棒54を
使用した場合として説明したが、これに限らず、例えば
ゴム様弾力性があり、かつ耐熱性もある蓋部材(ゴムは
250℃前後で変質するので好ましくないが)のみを用
い、プラズマトーチ1内の減圧で吸着させ、コアガスG
lの注入による増圧でチャンバーchの底に自然落下せ
しめるようにしてもよい。
(Other Embodiments) In the above embodiment, a ceramic plate or a heat-resistant metal plate material is used as the lid member 5, and the movable plate 51 and the lid support rod 54 are used, but the invention is not limited to this, for example. Using only a lid member that has rubber-like elasticity and heat resistance (rubber deteriorates at around 250°C, so it is not preferable), the core gas G is adsorbed under reduced pressure inside the plasma torch 1.
Alternatively, the pressure may be increased by injecting 1 to cause the sample to naturally fall to the bottom of the chamber channel.

また、上記実施例では真空排気装置4をコアガスGlの
内管102への供給用管路31に接続としたが、例えば
別個に直接内管102もしくは外管101へ接続するも
よく、管路設計は自由である。
Further, in the above embodiment, the evacuation device 4 is connected to the pipe line 31 for supplying the core gas Gl to the inner pipe 102, but for example, it may be connected directly to the inner pipe 102 or the outer pipe 101 separately, and the pipe line design is free.

以上のほかにも種々の構成によって本願と同一の作用を
行わせることが可能であるが、少くともプラズマトーチ
を減圧状態下において、高周波エネルギーによってグロ
ー放電を発生せしめ、コアーガスをグロー放電領域に序
々に注入してこれを高温プラズマに変換するという本願
の基本技術思想に則る限9本願第1発明の適用とされる
ところであり、またチャンバーに限らず、プラズマトー
チ内外の気圧差を利用してプラズマトーチの開口部の開
閉を自動的に行う限り本願第2発明の適用とされるとこ
ろである。
In addition to the above, it is possible to perform the same effect as the present application with various other configurations, but at least it is possible to generate a glow discharge using high-frequency energy while the plasma torch is under a reduced pressure state, and gradually move the core gas into the glow discharge area. The first invention of the present application is applicable only in accordance with the basic technical idea of the present application, which is to inject it into a high-temperature plasma and convert it into high-temperature plasma. As long as the opening and closing of the plasma torch opening is performed automatically, the second invention of the present application is applicable.

(発明の効果) 本発明を実施することにより、コアガスのみかららな高
純度の高温プラズマファイヤが得られ、当該プラズマフ
ァイヤを使用して行われる各種処理に効果的な作用を及
ぼすこととなシ、また実施に要する設備も極めてありふ
れたもので足り、かつ安価に設備しうるので、蒼らされ
る効果は顕著である。
(Effects of the Invention) By carrying out the present invention, a high-purity high-temperature plasma fire consisting only of core gas can be obtained, and the plasma fire will not have an effective effect on various treatments performed using the plasma fire. Moreover, the equipment required for implementation is extremely common and can be installed at low cost, so the effect of blue light is remarkable.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本願第2発明の実施例装置の一部断面正面図、
第2図(、)は第1図の部分斜視図、第2図(b)、(
e)および(d)は第1図に示す実施例装置の作用を示
す部分正面図である。 1・・・プラズマトーチ、101.102・・・外管お
よび内管からなる管体、3・・・コアガス供給源、31
・・・管路、4・・・真空排気装置、5・・・蓋部材、
C・・・高周波誘導コイル、GI・・・コアガス、ch
 ・・・チャンバー、P・・・高温プラズマファイヤ。
FIG. 1 is a partially sectional front view of the embodiment device of the second invention of the present application;
Figure 2 (,) is a partial perspective view of Figure 1, Figure 2 (b), (
e) and (d) are partial front views showing the operation of the embodiment device shown in FIG. 1; DESCRIPTION OF SYMBOLS 1... Plasma torch, 101.102... Tube body consisting of an outer tube and an inner tube, 3... Core gas supply source, 31
... Pipe line, 4... Vacuum exhaust device, 5... Lid member,
C...High frequency induction coil, GI...Core gas, ch
...Chamber, P...High temperature plasma fire.

Claims (1)

【特許請求の範囲】 1)管体の所定領域外周に巻回した高周波誘導コイルか
ら発生する高周波エネルギーを管体内へ注入されるコア
ガスに付与して高温プラズマファイヤを得るプラズマト
ーチを着火するに際し、最初に管体内を所定の減圧状態
として付与される高周波エネルギーによりグロー放電を
発生せしめ、ついで管体内へコアガスを序々に注入して
上記グロー放電を高温プラズマファイヤに変換するよう
にしたことを特徴とするプラズマトーチの着火方法。 2)一方端を閉端面とし他方端をチャンバー内に開口す
る開端面とした管体の所定領域外周に巻回した高周波誘
導コイルから発生する高周波エネルギーを管体内へ注入
されるコアガスに付与して高温プラズマファイヤを得る
プラズマトーチにおいて、上記管体内に管路を接続する
真空排気装置を設けるとともに、管体の開端面に当接し
てこれを閉成可能な蓋部材を常時常圧を維持するチャン
バー内に設け、当該蓋部材がチャンバー内と管体内との
圧力差によつて開端面に吸着またはこれから解離可能に
構成し、着火時にはコアガスの注入が停止されている管
体の開端面に蓋部材を当接のうえ真空排気装置を駆動さ
せて所定減圧状態となつた管体内に高周波エネルギーに
よつてグロー放電を発生せしめ、ついで管体内へコアガ
スを序々に注入して上記グロー放電を高温プラズマファ
イヤに変換し、同時に常圧に近づいた管体の開端面から
蓋部材が自重により解離するようにしたことを特徴とす
るプラズマトーチの着火方法。
[Claims] 1) When igniting a plasma torch that obtains a high-temperature plasma fire by imparting high-frequency energy generated from a high-frequency induction coil wound around the outer periphery of a predetermined area of the tube to a core gas injected into the tube, First, a glow discharge is generated by applying high-frequency energy while the inside of the tube is in a predetermined reduced pressure state, and then a core gas is gradually injected into the tube to convert the glow discharge into a high-temperature plasma fire. How to ignite a plasma torch. 2) High-frequency energy generated from a high-frequency induction coil wound around the outer periphery of a predetermined area of a tube with one end as a closed end surface and the other end as an open end surface opening into the chamber is applied to the core gas injected into the tube. In a plasma torch for producing high-temperature plasma fire, a chamber is provided with a vacuum evacuation device that connects a pipe line inside the tube body, and a lid member that can close the open end surface of the tube body at all times maintains normal pressure. The lid member is configured to be able to adsorb to or detach from the open end surface due to the pressure difference between the chamber and the tube body, and the lid member is attached to the open end surface of the tube body where injection of core gas is stopped at the time of ignition. After contacting the tube, a vacuum evacuation device is driven to generate a glow discharge using high-frequency energy inside the tube, which has reached a predetermined reduced pressure state.Then, core gas is gradually injected into the tube and the glow discharge is transferred to a high-temperature plasma fire. 2. A method for igniting a plasma torch, characterized in that the lid member is separated by its own weight from the open end face of the tube body which has reached normal pressure at the same time.
JP10442084A 1984-05-25 1984-05-25 Method of igniting plasma torch Granted JPS6168900A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10442084A JPS6168900A (en) 1984-05-25 1984-05-25 Method of igniting plasma torch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10442084A JPS6168900A (en) 1984-05-25 1984-05-25 Method of igniting plasma torch

Publications (2)

Publication Number Publication Date
JPS6168900A true JPS6168900A (en) 1986-04-09
JPH0510800B2 JPH0510800B2 (en) 1993-02-10

Family

ID=14380198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10442084A Granted JPS6168900A (en) 1984-05-25 1984-05-25 Method of igniting plasma torch

Country Status (1)

Country Link
JP (1) JPS6168900A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02260399A (en) * 1989-03-31 1990-10-23 Fuji Denpa Koki Kk Generating method of high pressure plasma arc
JPH0523496U (en) * 1991-09-09 1993-03-26 株式会社三社電機製作所 Induction plasma torch for decompression
US9583313B2 (en) 2013-08-20 2017-02-28 Panasonic Intellectual Property Management Co., Ltd. Plasma processing apparatus and plasma processing method
US10147585B2 (en) 2011-10-27 2018-12-04 Panasonic Intellectual Property Management Co., Ltd. Plasma processing apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02260399A (en) * 1989-03-31 1990-10-23 Fuji Denpa Koki Kk Generating method of high pressure plasma arc
JPH0523496U (en) * 1991-09-09 1993-03-26 株式会社三社電機製作所 Induction plasma torch for decompression
US10147585B2 (en) 2011-10-27 2018-12-04 Panasonic Intellectual Property Management Co., Ltd. Plasma processing apparatus
US10229814B2 (en) 2011-10-27 2019-03-12 Panasonic Intellectual Property Management Co., Ltd. Plasma processing apparatus
US9583313B2 (en) 2013-08-20 2017-02-28 Panasonic Intellectual Property Management Co., Ltd. Plasma processing apparatus and plasma processing method

Also Published As

Publication number Publication date
JPH0510800B2 (en) 1993-02-10

Similar Documents

Publication Publication Date Title
US9631592B2 (en) Fuel injection systems with enhanced corona burst
JP2758165B2 (en) Inductive plasma generator and method
US4665296A (en) Method of and apparatus for igniting a high-frequency torch to create a high-temperature plasma of high purity
US7900613B2 (en) High-frequency ignition system for motor vehicles
JPH01699A (en) Inductive plasma generator and method
AU573259B2 (en) Device for the thermal spary application of fusible materials
JPH0585752B2 (en)
JP5886975B2 (en) Plasma generation system with movable electrode
JPS6168900A (en) Method of igniting plasma torch
JP5137778B2 (en) Spark ignition internal combustion engine
JP2003501336A (en) Method and apparatus for manufacturing an optical fiber preform by plasma deposition
US6568362B2 (en) Rotating arc spark plug
US5513605A (en) Cooled railplug
RU2041164C1 (en) Method for manufacture of polycrystalline diamond layers
US5886478A (en) Integral igniter for electrodeless lamps
JPH0521320B2 (en)
JPS60230399A (en) Method and device for igniting plasma torch
JPH09223595A (en) Ignition method of high frequency inductive coupling arc plasma and plasma generator
RU204397U1 (en) Device for excitation of a discharge in an RFI plasmatron
JP4019255B2 (en) Glass article processing method and processing apparatus
CN109974030A (en) A kind of method and its application of the arc motion using magnet driving arc ignition device
GB1020486A (en) Internal combustion engines
JPS6157680B2 (en)
SU1234097A1 (en) Device for welding with magnet-controlled arc
JPH0367497A (en) Induction plasma generation device

Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term