JPH0324295Y2 - - Google Patents
Info
- Publication number
- JPH0324295Y2 JPH0324295Y2 JP17280085U JP17280085U JPH0324295Y2 JP H0324295 Y2 JPH0324295 Y2 JP H0324295Y2 JP 17280085 U JP17280085 U JP 17280085U JP 17280085 U JP17280085 U JP 17280085U JP H0324295 Y2 JPH0324295 Y2 JP H0324295Y2
- Authority
- JP
- Japan
- Prior art keywords
- shield cup
- conductive connection
- torch
- tip
- connection part
- 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
- 238000003780 insertion Methods 0.000 claims description 26
- 230000037431 insertion Effects 0.000 claims description 26
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 37
- 239000003566 sealing material Substances 0.000 description 3
- 239000000112 cooling gas Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、プラズマ切断用トーチの改良に関す
るものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement of a plasma cutting torch.
従来の技術
プラズマ切断は、プラズマアークの切断作用を
利用して、鋼材、アルミ、銅板等の高速切断を行
うものであるが、このプラズマ切断を手動操作に
より行う際には、従来より、第６図〜第８図に示
したようなプラズマ切断用トーチA′が使用され
る。PRIOR ART Plasma cutting uses the cutting action of a plasma arc to cut steel materials, aluminum, copper plates, etc. at high speed. A plasma cutting torch A' as shown in FIGS. 8 to 8 is used.
すなわち、このプラズマ切断用トーチA′は、
トーチ本体１の先端で、プラズマアークを発生す
る構造をなすもので、トーチ本体１は、ガス導管
３をエポキシ樹脂等の絶縁性素材で被覆して形成
されている。 In other words, this plasma cutting torch A' is
The torch body 1 has a structure in which a plasma arc is generated at the tip of the torch body 1, and the torch body 1 is formed by covering a gas conduit 3 with an insulating material such as epoxy resin.
ガス導管３は、導電性素材で形成されており、
作動ガスの通路を構成するとともに、切断電流及
び高周波電流の通電路を構成している。 The gas conduit 3 is made of a conductive material,
It constitutes a passage for working gas, and also constitutes a conduction path for cutting current and high-frequency current.
そして、ガス導管３の先端部には、真鍮などの
熱伝導性の良好な合金で製された円筒状の導電性
接続部４が形成されており、この導電性接続部４
の外周には螺子部４０が形成されている。 A cylindrical conductive connection part 4 made of an alloy with good thermal conductivity such as brass is formed at the tip of the gas conduit 3.
A threaded portion 40 is formed on the outer periphery of.
また、導電性接続部４の中心部には、ガス導管
３に通じる配流部材４１が設けられており、この
配流部材４１の挿通孔４１ａの外周には複数の連
通路１４ｂが軸方向に形成されている。 Further, a flow distribution member 41 communicating with the gas conduit 3 is provided at the center of the conductive connection portion 4, and a plurality of communication passages 14b are formed in the axial direction on the outer periphery of the insertion hole 41a of the flow distribution member 41. ing.
６は、電極５の先端に設けられたガスデストリ
ビユータであり、電極５の突出極部５ａを挿入す
る孔６ａを有している。このデストリビユータ６
は径方向に貫通する複数の貫通孔６ｂを有してい
る。ガス導管３より導出された作動ガスの一部
は、挿通孔４１ａから貫通孔４１ｂを通り、チツ
プ７の冷却ガスとなり、そのままシールドカツプ
８の先端開口８ｂより放出されるが、他の一部は
ガスデストリビユータ６の配流孔６ｂを通り挿通
孔６ａ内に放出されて旋回流となり、チツプ７の
挿通孔７ａよりプラズマアークの作動ガスとして
放出される。ガスデストリビユータ６の先端に
は、中央部に貫通孔７ａが形成されたチツプ７が
電極５と所定間隙を保持し、その先端を覆うよう
にして設けられている。また、電極５は使用に伴
つて次第に消耗されていくので、交換する必要が
ある。このため、トーチA′の先端部は分解可能
な構造となつており、電極５にガスデストリビユ
ータ６、チツプ７を順に重ねてあり、シールドカ
ツプ８内面の螺子部８１と導電接続部４の外周に
設けた螺子部４０とを螺合させることによつて該
カツプ８をトーチ本体１側に取着する。そして、
シールドカツプ８の取着時には、これら各部品が
固定されるとともに部品間の接触により電気的接
続がなされるものである。なお、９は作動ガスの
漏れを防止するために設けた気密用Ｏリングであ
る。 6 is a gas distributor provided at the tip of the electrode 5, and has a hole 6a into which the protruding pole portion 5a of the electrode 5 is inserted. This distribution viewer 6
has a plurality of through holes 6b that penetrate in the radial direction. A part of the working gas led out from the gas conduit 3 passes through the insertion hole 41a and the through hole 41b, becomes a cooling gas for the chip 7, and is released as it is from the tip opening 8b of the shield cup 8, but the other part passes through the through hole 41b. It passes through the distribution hole 6b of the gas distributor 6, is discharged into the insertion hole 6a, becomes a swirling flow, and is discharged from the insertion hole 7a of the chip 7 as working gas for the plasma arc. At the tip of the gas distributor 6, a chip 7 having a through hole 7a formed in the center is provided so as to maintain a predetermined gap from the electrode 5 and cover the tip. Further, the electrode 5 gradually wears out with use, and therefore needs to be replaced. For this reason, the tip of the torch A' has a structure that can be disassembled, and the gas distributor 6 and the chip 7 are stacked on the electrode 5 in this order, and the screw part 81 on the inner surface of the shield cup 8 and the conductive connection part 4 are connected to each other. The cup 8 is attached to the torch main body 1 by screwing together a threaded portion 40 provided on the outer periphery. and,
When the shield cup 8 is attached, each of these parts is fixed and an electrical connection is established by contact between the parts. Note that 9 is an airtight O-ring provided to prevent leakage of working gas.
このような構造のプラズマ切断用トーチA′で
は、シールドカツプ８の基部端縁８ａとトーチ本
体１の絶縁層１１の端縁１１ａとの間を完全に封
止してしまうことはできず、それらは幾らかの間
隙を有する。このため、プラズマアークの発生に
必要な高周波電圧に対する絶縁は、シールドカツ
プ８の内周とトーチ本体１の絶縁層１１によつて
覆われた部分だけとなる。 In the plasma cutting torch A' having such a structure, it is impossible to completely seal the gap between the base edge 8a of the shield cup 8 and the edge 11a of the insulating layer 11 of the torch body 1. has some gap. Therefore, the only insulation against the high-frequency voltage necessary for generating a plasma arc is the inner periphery of the shield cup 8 and the portion of the torch body 1 covered by the insulating layer 11.
したがつて、このままで使用すると、高周波の
漏れによる悪影響を生じるため、従来では、第６
図〜第８図に示したように、シリコンゴム等の弾
性絶縁物による円筒状絶縁カバー１０をシールド
カツプ８の先端の方から嵌入してトーチ本体１に
装着し、絶縁カバー１０の内面に形成された凸部
１０ａをトーチ本体１の溝１１ｂに入れて固定し
て高周波の漏れを防止するようしていた。 Therefore, if used as is, there would be an adverse effect due to high frequency leakage, so conventionally, the sixth
As shown in FIGS. 8 to 8, a cylindrical insulating cover 10 made of an elastic insulator such as silicone rubber is inserted into the shield cup 8 from the tip and attached to the torch body 1, and formed on the inner surface of the insulating cover 10. The convex portion 10a thus formed is inserted into the groove 11b of the torch body 1 and fixed to prevent high frequency leakage.
また、従来のプラズマ切断用トーチA′におい
ては、導電性接続部４の内部に設けた配流部材４
１の挿通孔４１ａに挿嵌される電極５は、径大な
本体部５ｂの両端に径小な突出極部５ａ，５ａを
設けた形状になつており、ガス導管３より導かれ
た作動ガスをトーチ先端に配流して導くようにし
ている。このため、配流部材４１は、中央の挿通
孔４１ａの外周側に複数の連通孔４１ｂを軸方向
に形成した複雑な構造になつている。 In addition, in the conventional plasma cutting torch A', a flow distribution member 4 provided inside the conductive connection part 4
The electrode 5 inserted into the insertion hole 41a of 1 has a shape in which protruding pole parts 5a, 5a with a small diameter are provided at both ends of a main body part 5b with a large diameter. is distributed and guided to the tip of the torch. Therefore, the flow distribution member 41 has a complicated structure in which a plurality of communication holes 41b are formed in the axial direction on the outer peripheral side of the central insertion hole 41a.
上記のような構造のプラズマ切断用トーチで
は、弾性絶縁物による円筒状絶縁カバー１０をシ
ールドカツプ８の先端の方から嵌入し使用しなけ
ればならないので、トーチ本体１の外径が大きく
なり、手で操作するのが困難になる。 In the plasma cutting torch having the above structure, the cylindrical insulating cover 10 made of an elastic insulator must be inserted from the tip of the shield cup 8, so the outer diameter of the torch body 1 becomes large, making it difficult to handle. becomes difficult to operate.
また、電極５の交換時などにおいて、シールド
カツプ８を取り外す時には、円筒状絶縁カバー１
０が外れてしまい易く、電極の交換にも手間を要
し、分解作業が面倒になるなどの問題点を有して
いた。 In addition, when removing the shield cup 8 when replacing the electrode 5, etc., the cylindrical insulating cover 1
The zero point easily comes off, it takes time to replace the electrodes, and the disassembly work becomes troublesome.
考案が解決しようとする問題点
本考案は、従来のプラズマ切断用トーチにおけ
る叙上の如き欠点を解決するもので、径小で、か
つ高周波の漏れを確実に防止できるプラズマ切断
用トーチを提供することを目的としている。Problems to be solved by the invention The present invention solves the above-mentioned drawbacks of conventional plasma cutting torches, and provides a plasma cutting torch that has a small diameter and can reliably prevent leakage of high frequency waves. The purpose is to
また、本考案は、構造が簡単で、部品点数も少
なく、分解、清掃の容易なプラズマ切断用トーチ
を提供することを目的としている。 Another object of the present invention is to provide a plasma cutting torch that has a simple structure, has a small number of parts, and is easy to disassemble and clean.
問題点を解決するための手段
上記目的は、本考案のプラズマ切断用トーチに
よつて達成される。Means for Solving the Problems The above objects are achieved by the plasma cutting torch of the present invention.
ここに、本考案は、トーチ本体の先端部に、絶
縁性のシールドカツプを着脱可能に取着したプラ
ズマ切断用トーチの改良に係るものであり、トー
チ本体に設けられた導電性接続部の外周部に、該
トーチ本体の外周に設けられた絶縁層より一体的
に延出し、上記シールドカツプの内周面と十分な
沿面距離をもつて重合する絶縁部を設けるととも
に、上記導電性接続部内に、径大部にフインを形
成した電極を直接に挿嵌させる構造にしたことを
特徴とする。 The present invention relates to an improvement of a plasma cutting torch in which an insulating shield cup is removably attached to the tip of the torch body, and the outer periphery of the conductive connection provided on the torch body An insulating part is provided in the part, which integrally extends from the insulating layer provided on the outer periphery of the torch body and overlaps with the inner circumferential surface of the shield cup with a sufficient creepage distance, and an insulating part is provided in the conductive connection part. , is characterized by a structure in which an electrode with fins formed in the large diameter portion is directly inserted.
考案の実施例
以下に、添付図とともに、本考案の一実施例を
説明する。本実施例の構成のうち、第１図に示し
たものと対応する部分には同一の参照符号を付し
てその説明を省略する。Embodiment of the invention An embodiment of the invention will be described below with reference to the accompanying drawings. Of the configuration of this embodiment, parts corresponding to those shown in FIG. 1 are given the same reference numerals, and their explanations will be omitted.
本考案のプラズマ切断用トーチＡは、第１図に
見るように、トーチ本体１に、電極５１、ガスデ
ストリビユータ６、チツプ７、シールドカツプ８
を組合わせて構成される。 As shown in FIG. 1, the plasma cutting torch A of the present invention includes a torch body 1, an electrode 51, a gas distributor 6, a tip 7, and a shield cup 8.
It is composed of a combination of
ここに、トーチ本体１は、作動ガスの通路とな
るガス導管３外周にエポキシ樹脂など絶縁層１１
を形成して構成されており、ガス導管３の先端に
は、導電性接続部４が設けられている。 Here, the torch body 1 has an insulating layer 11 such as epoxy resin on the outer periphery of the gas conduit 3 that serves as a passage for the working gas.
A conductive connecting portion 4 is provided at the tip of the gas conduit 3.
そして、導電性接続部４は、中央にガス導管３
に通じる挿通路４ａを有し、外周に螺子部４０を
形成してある。そして、導電性接続部４の首部に
は、気密用Ｏリング９が嵌装されている。このよ
うな導電性接続部４の挿通路４ａには、径大部５
１ｂに複数のフイン５１ｃを形成し両端に突出極
部５１ａ，５１ａを形成した電極５１の片方の突
出極部５１ａが挿嵌され、他方の突出極部５１ａ
をガスデストリビユータ６の挿通孔６ａに嵌入
し、この先端をチツプ７で保護する。電極５１、
ガスデストリビユータ６、チツプ７は、導電性接
続部４にシールドカツプ８を螺合させた時に、シ
ールドカツプ８内で固定される。 The conductive connection part 4 has a gas conduit 3 in the center.
It has an insertion passage 4a leading to the outer periphery thereof, and a threaded portion 40 is formed on the outer periphery. An airtight O-ring 9 is fitted into the neck of the conductive connection part 4. The insertion passage 4a of such a conductive connection portion 4 has a large diameter portion 5.
One protruding pole part 51a of the electrode 51, which has a plurality of fins 51c formed on 1b and protruding pole parts 51a, 51a formed at both ends, is inserted and the other protruding pole part 51a is inserted.
is inserted into the insertion hole 6a of the gas distributor 6, and its tip is protected with the chip 7. electrode 51,
The gas distributor 6 and the chip 7 are fixed in the shield cup 8 when the shield cup 8 is screwed onto the conductive connection 4.
このようにして、シールドカツプ８を導電性接
続部４に取着すると、気密用Ｏリング９によつて
作動ガスが外部に漏出するのが防止される。導電
性接続部４の挿通路４ａ内に、片方の突出極部５
１ａが挿入される電極５１の他方の突出極部５１
ａは、ガスデストリビユータ６の中央に設けられ
た挿通孔６ａ内に挿入され、この挿通孔６ａより
突出した電極５１の突出極部５１ａは、更に中央
に挿通孔７ａを形成したチツプ７によつて保護さ
れる。ここに、ガスデストリビユータ６は、中央
に形成された挿通孔６ａに直交する配流孔６ｂを
径方向に形成している。 When the shield cup 8 is attached to the conductive connection part 4 in this manner, the leakage of the working gas to the outside is prevented by the airtight O-ring 9. One protruding pole portion 5 is inserted into the insertion path 4a of the conductive connection portion 4.
The other protruding pole portion 51 of the electrode 51 into which 1a is inserted
a is inserted into the insertion hole 6a provided in the center of the gas distributor 6, and the protruding pole portion 51a of the electrode 51 that protrudes from the insertion hole 6a is inserted into the chip 7 which has an insertion hole 7a formed in the center. protected. Here, the gas distributor 6 has a distribution hole 6b formed in the radial direction that is perpendicular to the insertion hole 6a formed in the center.
ガス導管３より導出された作動ガスの一部は、
挿通路４ａから太径貫通孔４ｂを通り、チツプ７
の冷却ガスとなり、そのままシールドカツプ８の
先端開口８ｂより放出されるが、他の一部はガス
デストリビユータ６の配流孔６ｂを通り挿通孔６
ａ内に放出されて旋回流となり、チツプ７の挿通
孔７ａよりプラズマアークの作動ガスとして放出
される。 A part of the working gas led out from the gas pipe 3 is
The chip 7 passes through the large diameter through hole 4b from the insertion path 4a.
The cooling gas is released as it is from the tip opening 8b of the shield cup 8, but the other part passes through the distribution hole 6b of the gas distributor 6 and enters the insertion hole 6.
The gas is discharged into the interior of the chip 7 to form a swirling flow, and is discharged from the insertion hole 7a of the chip 7 as a working gas for the plasma arc.
一方、導電性接続部４の外周には、螺子部４０
が形成されており、この螺子部４０にシールドカ
ツプ８の螺子部８１を螺合させて、トーチ本体１
の先端に、シールドカツプ８を取着する。 On the other hand, a screw portion 40 is provided on the outer periphery of the conductive connection portion 4.
is formed, and the threaded part 81 of the shield cup 8 is screwed into this threaded part 40, and the torch main body 1 is assembled.
Attach the shield cup 8 to the tip.
かくして、ガスデストリビユータ６、チツプ７
はこのシールドカツプ８の取着時に固定され、切
断電流及び高周波電流の通路となる。 Thus, gas distributor 6, chip 7
is fixed when this shield cup 8 is attached, and serves as a path for cutting current and high frequency current.
なお、９は導電性接続部４とシールドカツプ８
の内周面に介在されたＯリングであり、これによ
つて作動ガスがトーチ本体１の先端より外部に漏
出するのを防止している。 In addition, 9 indicates the conductive connection part 4 and the shield cup 8.
This is an O-ring interposed on the inner peripheral surface of the torch body 1, which prevents the working gas from leaking outside from the tip of the torch body 1.
また、導電性接続部４の螺子部４０の上部には
トーチ本体１の絶縁層１１より一体的に延出した
絶縁部１２が形成されており、この絶縁部１２の
外周面に、シールドカツプ８の内周面を十分な距
離だけ重合させて、導電性接続部４からの沿面距
離を十分に採つている。 Further, an insulating part 12 is formed on the upper part of the screw part 40 of the conductive connecting part 4 and extends integrally from the insulating layer 11 of the torch main body 1, and a shield cup 8 is formed on the outer peripheral surface of this insulating part 12. The inner peripheral surfaces of the conductive connectors 4 are overlapped by a sufficient distance to provide a sufficient creepage distance from the conductive connecting portion 4.
このようにして突出した絶縁部１２と、トーチ
本体１の絶縁層１１の端部には、シールドカツプ
８の基部端縁８ａに対応した段差１１ａが形成さ
れており、この段差１１ａにシールドカツプ８の
基部端縁８ａを合致させるようにして、シールド
カツプ８を導電性接続部４の螺子部４０に螺合さ
せ取着させる。また、シールドカツプ８の基部端
縁８ａと絶縁層１１の端部の段差１１ａとの間に
は、防塵用のシール材１３が介在され、このシー
ル材１３によつてプラズマ切断時に生じる粉塵が
侵入するのを防止している。 A step 11a corresponding to the base edge 8a of the shield cup 8 is formed at the end of the insulating layer 11 of the torch body 1 and the insulating portion 12 that protrudes in this manner. The shield cup 8 is screwed onto the threaded portion 40 of the conductive connecting portion 4 so that the base edges 8a of the shield cup 8 are aligned with each other. Further, a dustproof sealing material 13 is interposed between the base edge 8a of the shield cup 8 and the step 11a at the end of the insulating layer 11, and this sealing material 13 allows dust generated during plasma cutting to enter. It prevents you from doing so.
更に、本考案においては、電極５１は、その径
大部５１ｂにフイン５１ｃを形成した構造にして
あるので、導電性接続部４の挿通路４ａ内に電極
５１を挿嵌入した時には、その電極５１のフイン
５１ｃと導電性接続部４の挿通路４ａの内周面と
によつて作動ガスの通路が形成される。 Furthermore, in the present invention, since the electrode 51 has a structure in which the fins 51c are formed on the large diameter portion 51b, when the electrode 51 is inserted into the insertion passage 4a of the conductive connecting portion 4, the electrode 51 A working gas passage is formed by the fins 51c and the inner peripheral surface of the insertion passage 4a of the conductive connection portion 4.
このため、導電性接続部４の中央部に、ガス導
管３に通じる配流部材を設ける必要はなく、部品
点数が軽減でき、構造の簡単なものが使用でき
る。また、このような構造のため、本考案のプラ
ズマ切断用トーチによれば、分解、清掃が簡単に
なる利点もある。 Therefore, there is no need to provide a distribution member communicating with the gas conduit 3 in the center of the conductive connection part 4, and the number of parts can be reduced and a simple structure can be used. Furthermore, because of this structure, the plasma cutting torch of the present invention has the advantage that it can be easily disassembled and cleaned.
考案の作用及び効果
以上の説明より理解されるように、本考案のプ
ラズマ切断用トーチによれば、トーチ本体の絶縁
層より一体的に延出した絶縁部と、シールドカツ
プの内周面とを十分に重合させて絶縁部の沿面距
離を十分に採つた構造となつているので、プラズ
マ切断時に生じる有害な高周波の漏れを確実に防
止できる。Functions and Effects of the Invention As understood from the above explanation, according to the plasma cutting torch of the present invention, the insulating portion integrally extending from the insulating layer of the torch body and the inner circumferential surface of the shield cup are connected to each other. Since the structure is such that sufficient polymerization is achieved and the creepage distance of the insulating portion is sufficient, it is possible to reliably prevent leakage of harmful high frequency waves that occur during plasma cutting.
また、本考案のプラズマ切断用トーチにおいて
は、トーチ本体の外部に、絶縁部材を設けるなど
の構造を採らないので、トーチの径を小さく、か
つスマートにでき、使い易いプラズマ切断用トー
チが得られる。 In addition, the plasma cutting torch of the present invention does not require any structure such as providing an insulating member on the outside of the torch body, so the diameter of the torch can be made smaller and smarter, and a plasma cutting torch that is easier to use can be obtained. .
また、電極は、その径大部にフインを設けた構
造をなしているので、導電性接続部の挿通路内に
直接挿嵌させて取着できると共に作動ガス通路が
形成され、導電性接続部の中央部にガス導管に通
ずる配流部材を設ける必要がなく、構造が簡単で
あるばかりでなく、分解、清掃も一層容易できる
利点がある。 In addition, since the electrode has a structure in which fins are provided on the large diameter part, it can be directly inserted and attached into the insertion path of the conductive connection part, and a working gas passage is formed. There is no need to provide a distribution member leading to the gas conduit in the center of the gas conduit, which has the advantage of not only a simple structure but also easier disassembly and cleaning.
第１図は、本考案のプラズマ切断用トーチの一
実施例分解斜視図、第２図はその要部縦断面構造
図、第３図、第４図、第５図は、それぞれ第２図
の−線断面図、−線断面図、−線断
面図であり、第６図〜第８図は従来のプラズマ切
断用トーチの例図であり、第６図はトーチ本体先
端部の斜視図、第７図はトーチ先端の分解斜視
図、第８図は、トーチ先端の縦断面構造図であ
る。
符号の説明、１……トーチ本体、１１……絶縁
層、１２……絶縁部、３……ガス導管、４……導
電性接続部、５１……電極、５１ａ……突出電極
部、５１ｂ……径大部、５１ｃ……フイン、６…
…ガスデストリビユータ、７……チツプ、８……
シールドカツプ、９，１３……シール材。
FIG. 1 is an exploded perspective view of one embodiment of the plasma cutting torch of the present invention, FIG. 2 is a vertical cross-sectional structural view of the main part thereof, and FIGS. 3, 4, and 5 are the same as those in FIG. - line cross-sectional view, - line cross-sectional view, - line cross-sectional view, FIGS. 6 to 8 are examples of conventional plasma cutting torches, and FIG. FIG. 7 is an exploded perspective view of the torch tip, and FIG. 8 is a vertical cross-sectional structural view of the torch tip. Explanation of symbols: 1... Torch body, 11... Insulating layer, 12... Insulating section, 3... Gas conduit, 4... Conductive connection section, 51... Electrode, 51a... Protruding electrode section, 51b... ...Large diameter part, 51c...Fin, 6...
...Gas distributor, 7... Chip, 8...
Shield cup, 9, 13... sealing material.
Claims (1)
電性接続部をガス導管の先端に設け、ガス導管の
外周を絶縁層で被覆したトーチ本体の導電接続部
の挿通路に、経大部の両端に突出極部を有する電
極の片方の突出極部を嵌挿し、他方の突出極部を
中央に形成した挿通孔に直交する配流孔を径方向
に形成したガスデストリビユータの挿通孔に嵌入
し、該突出極部の先端を中央に挿通孔を有するチ
ツプで保護して、該導電性接続部の螺子部に内周
胴に螺子部を有するシールドカツプを螺合させ、
トーチ本体の先端にシールドカツプを着脱可能に
取着し、シールドカツプの取着時にこれら各部品
が固定されるとともに、部品間の接触により電気
的接続がなされるようにしたプラズマ切断用トー
チに於いて、 導電性接続部の外周胴にトーチ本体の外周に設
けられた絶縁層より一体的に延出し、シールドカ
ツプの内周面と十分な沿面距離をもつて重合する
絶縁部を設けるとともに、電極の経大部外周胴に
フインを設け、導電性接続部の挿通路の内周面と
フインとによつて作動ガスの通路を形成せしめた
ことを特徴とするプラズマ切断用トーチ。[Scope of Claim for Utility Model Registration] A conductive connection part of a torch body in which a conductive connection part with an insertion passage in the center and a threaded part formed on the outer periphery is provided at the tip of a gas conduit, and the outer periphery of the gas conduit is covered with an insulating layer. One protruding pole part of an electrode having protruding pole parts at both ends of the large diameter part was inserted into the insertion passage, and a distribution hole was formed in the radial direction perpendicular to the insertion hole with the other protruding pole part formed in the center. A shield cup is inserted into the insertion hole of the gas distributor, the tip of the protruding pole part is protected with a chip having an insertion hole in the center, and a shield cup having a thread part on the inner peripheral body is attached to the thread part of the conductive connection part. screw together,
In a plasma cutting torch, a shield cup is removably attached to the tip of the torch body, and when the shield cup is attached, these parts are fixed and an electrical connection is made by contact between the parts. An insulating part is provided on the outer circumferential body of the conductive connection part, extending integrally from the insulating layer provided on the outer periphery of the torch body, and overlapping with the inner circumferential surface of the shield cup with a sufficient creepage distance, and A plasma cutting torch characterized in that a fin is provided on the outer peripheral body of the large diameter part, and a working gas passage is formed by the fin and the inner peripheral surface of the insertion passage of the conductive connection part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17280085U JPH0324295Y2 (en) | 1985-11-08 | 1985-11-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17280085U JPH0324295Y2 (en) | 1985-11-08 | 1985-11-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6282184U JPS6282184U (en) | 1987-05-26 |
| JPH0324295Y2 true JPH0324295Y2 (en) | 1991-05-27 |
Family
ID=31109666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17280085U Expired JPH0324295Y2 (en) | 1985-11-08 | 1985-11-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0324295Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4716269A (en) * | 1986-10-01 | 1987-12-29 | L-Tec Company | Plasma arc torch having supplemental electrode cooling mechanisms |
| JP2001061852A (en) * | 1999-08-26 | 2001-03-13 | Assist Japan Kk | Plasma-like gas generating device |
| FI20031331A (en) * | 2003-09-17 | 2005-03-18 | Tomion Oy | Cooled plasma torch and method for cooling torch |
| JP4688450B2 (en) * | 2004-08-16 | 2011-05-25 | 株式会社小松製作所 | Plasma processing machine, plasma torch and method for attaching / detaching the parts |
-
1985
- 1985-11-08 JP JP17280085U patent/JPH0324295Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6282184U (en) | 1987-05-26 |
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