JP2002357307A - High pressure high speed cutting nozzle - Google Patents
High pressure high speed cutting nozzleInfo
- Publication number
- JP2002357307A JP2002357307A JP2001165740A JP2001165740A JP2002357307A JP 2002357307 A JP2002357307 A JP 2002357307A JP 2001165740 A JP2001165740 A JP 2001165740A JP 2001165740 A JP2001165740 A JP 2001165740A JP 2002357307 A JP2002357307 A JP 2002357307A
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- oxygen
- crater
- ejection hole
- nozzle
- 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
Links
Landscapes
- Gas Burners (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、連続鋳造鋳片を始
めとする厚い鋼板等のガス切断に用いて好適な高圧高速
切断火口（以下、火口と略称する。）に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure, high-speed cutting crater (hereinafter, abbreviated as "crater") suitable for gas cutting of a thick steel plate such as a continuous cast slab.
【０００２】[0002]
【従来の技術】本発明者らは、先に、例えば実公平５−
３９２９３号に開示された火口を提案した。この火口
は、その先端面中央部に開口する切断酸素噴出孔の周囲
に、内側から、第一の酸素噴出孔群と、第一の燃料ガス
噴出孔群と、第二の燃料ガス噴出孔群と、酸素噴出口
（または第二の酸素噴出孔群）とを、切断酸素噴出孔と
同軸をなす輪状に配設したものである。また、上記燃料
ガス噴出孔群が、第一及び第二の燃料ガス噴出孔群から
なる二重ではなく、一重であるものも存在する。2. Description of the Related Art The present inventors have previously described, for example,
No. 39293 proposed a crater. This crater is composed of a first group of oxygen outlets, a first group of fuel gas outlets, and a second group of fuel gas outlets, from the inside, around the cut oxygen outlets opening at the center of the tip end surface. And the oxygen outlet (or the second oxygen outlet group) are arranged in a ring shape coaxial with the cut oxygen outlet. Further, there is a case where the fuel gas ejection hole group is not a double consisting of the first and second fuel gas ejection hole groups but is single.
【０００３】これら火口は、その最外周部に形成された
カバー、あるいは火口の最外周部に着脱自在に嵌合され
る取付ナットを介して、上記火口より大径の、酸素及び
燃料ガス供給用の吹管の先端に、着脱自在に取り付けら
れる。この場合、これらカバーまたは取付ナットと吹管
とは、カバーまたは取付ナットの基端部外周面に形成さ
れた雄ねじ部を、吹管の先端部内周面に形成された雌ね
じ部に螺合させ、締結することにより取り付けられる。[0003] These craters are provided with a cover formed at the outermost periphery thereof or a mounting nut which is removably fitted to the outermost periphery of the crater to supply oxygen and fuel gas having a diameter larger than that of the crater. Is detachably attached to the tip of the blowpipe. In this case, the cover or the mounting nut and the blow pipe are screwed together with the external thread formed on the outer peripheral surface of the base end portion of the cover or the mounting nut and the female screw formed on the inner circumferential surface of the distal end of the blow pipe. It is attached by.
【０００４】また、これら火口を用いた鋼材の切断に際
しては、切断酸素噴出孔から高圧の切断酸素噴出流を噴
出させるとともに、その周囲から噴出された酸素と燃料
ガスとにより、切断酸素噴出流を囲む加熱炎群を形成す
る。そして、その結果得られる高温高圧の切断酸素噴出
流を鋼材の表面に向け噴射することにより、鋼材が、３
０００℃程度の温度で加熱され、切断される。[0004] When cutting steel materials using these craters, a high-pressure cutting oxygen jet is jetted from a cutting oxygen jet hole, and the cutting oxygen jet is jetted by the oxygen and fuel gas jetted from the surroundings. A group of surrounding heating flames is formed. Then, the resulting high-temperature and high-pressure cut oxygen jet is jetted toward the surface of the steel material, so that the steel material becomes 3
It is heated at a temperature of about 000 ° C. and cut.
【０００５】[0005]
【発明が解決しようとする課題】ところで、上記鋼材の
切断に際しては、鋼材が厚いため、切断に伴い多量のス
ラグ（加熱された鋼材の急速な酸化により発生する酸化
第一鉄、酸化第二鉄等）が発生する。このスラグは、加
熱時に溶融状態で火口側にも飛散し、上記カバーまたは
取付ナットと吹管との取付部（後述する図１及び図３に
矢印Ａで示す部分）に付着することが多い。取付部Ａに
付着したスラグは、取付部Ａにて冷却されて固着し、吹
管に対する火口の着脱作業を困難とするばかりではな
く、取付部Ａを傷付けるため、その都度吹管や火口を修
理し、場合によっては、吹管を交換する必要があった。However, when cutting the above steel material, since the steel material is thick, a large amount of slag (ferrous oxide, ferric oxide generated by rapid oxidation of the heated steel material) accompanying the cutting is required. Etc.) occur. This slag often scatters to the crater side in a molten state at the time of heating, and adheres to the cover (the portion indicated by arrow A in FIGS. 1 and 3 to be described later) between the cover or the mounting nut and the blowpipe. The slag attached to the mounting portion A is cooled and fixed at the mounting portion A, and not only makes the work of attaching and detaching the crater to the blow pipe difficult, but also damages the mounting portion A, so that the blow tube and the crater are repaired each time. In some cases, it was necessary to replace the blowpipe.
【０００６】本発明は上記事情に鑑みてなされたもの
で、上記取付部Ａへのスラグの付着を防止し、吹管及び
火口の寿命を延長させるとともに、吹管に対する火口の
着脱作業を容易化することを目的とする。The present invention has been made in view of the above circumstances, and prevents slag from adhering to the mounting portion A, prolongs the life of the blowpipe and crater, and facilitates the work of attaching and detaching the crater to and from the blowpipe. With the goal.
【０００７】[0007]
【課題を解決するための手段】本発明は、先端面に切断
酸素噴出孔が開口し、切断酸素噴出孔を中心として内側
から、酸素噴出孔群と、燃料ガス噴出孔群と、酸素噴出
口とが、上記切断酸素噴出孔と同軸をなす輪状に配設さ
れ、上記切断酸素噴出孔から噴出する高圧の気流により
鋼材を切断する高圧高速切断火口において、上記火口
が、その最外周部に形成されたカバー、あるいはその最
外周部に着脱自在に嵌合される取付ナットを介して、上
記火口より大径の、酸素及び燃料ガス供給用の吹管の先
端に着脱自在に取り付けられるとともに、上記カバーま
たは取付ナットに、その外周端から径方向外方に延設さ
れ、上記吹管への上記火口の取付時に上記カバーまたは
取付ナットと上記吹管との取付部を先端側から覆い、上
記鋼材の切断に伴い発生するスラグの上記取付部への付
着を防止する鍔を設けたことを特徴としている。SUMMARY OF THE INVENTION According to the present invention, there is provided a cutting oxygen ejection hole which is opened at a front end face thereof, and an oxygen ejection hole group, a fuel gas ejection hole group, and an oxygen ejection hole are arranged from the inside centering on the cutting oxygen ejection hole. And a high-pressure high-speed cutting crater which is disposed in a ring shape coaxial with the cutting oxygen ejection hole and cuts the steel material by a high-pressure airflow ejected from the cutting oxygen ejection hole, wherein the crater is formed on the outermost peripheral portion thereof. The cover or the cover is detachably attached to the tip of a blower tube for supplying oxygen and fuel gas having a diameter larger than that of the crater through a mounting nut detachably fitted to the outermost portion of the cover. Or to the mounting nut, extending radially outward from the outer peripheral end thereof, when mounting the crater to the blowpipe, cover the mounting portion between the cover or mounting nut and the blowpipe from the tip side to cut the steel material. Accompanying It is characterized in that a collar to prevent sticking to the mounting portion of the raw slag.
【０００８】この場合、上記鍔は、上記カバーまたは取
付ナットの基端縁に形成することが望ましい。[0008] In this case, it is desirable that the flange is formed at the base end of the cover or the mounting nut.
【０００９】[0009]
【発明の実施の形態】以下、図面に基づき、本発明の実
施形態について説明する。本発明の第一の実施形態を図
１及び図２に示す。符号１０は吹管で、吹管１０は円筒
状をなし、その先端（図１中下端）面中央部には、基端
側に凹なる擂鉢状のテーパ面１０ａが形成されている。
テーパ面１０ａの中央には、切断酸素供給用の流路１０
ｂが、吹管１０と同軸をなすよう形成されるとともに、
テーパ面１０ａには、酸素、燃料ガス、及び酸素供給用
の流路１０ｃ，１０ｄ，１０ｅの先端がそれぞれ開口し
ている。Embodiments of the present invention will be described below with reference to the drawings. A first embodiment of the present invention is shown in FIGS. Reference numeral 10 denotes a blowpipe. The blowpipe 10 has a cylindrical shape, and a mortar-shaped tapered surface 10a that is concave toward the base end is formed at the center of the front end (lower end in FIG. 1).
In the center of the tapered surface 10a, there is a flow path 10 for cutting oxygen supply.
b is formed so as to be coaxial with the blow pipe 10,
The front ends of flow paths 10c, 10d, and 10e for supplying oxygen, fuel gas, and oxygen are respectively opened in the tapered surface 10a.
【００１０】符号１は火口本体で、火口本体１は円筒状
をなし、その基端側（図１中上端側）は、基端側に凸な
る円錐状のテーパ面１ａとされ、火口本体１は、このテ
ーパ面１ａを吹管１０のテーパ面１０ａに密着させるこ
とにより、吹管１０に連結される。また、テーパ面１ａ
には、吹管１０からそれぞれ酸素、燃料ガス、及び酸素
の供給を受ける凹部１ｂ，１ｃ，１ｄが、吹管１０のテ
ーパ面１０ａに形成された流路１０ｃ，１０ｄ，１０ｅ
とそれぞれ連通するよう形成されている。更に、凹部１
ｂからは、火口本体１の内周側に向け流路１ｅが形成さ
れ、凹部１ｃ，１ｄからは、火口本体１の先端側にそれ
ぞれ延びる流路１ｆ，１ｇが、火口本体１と略同軸をな
す輪状に配設されている。Reference numeral 1 denotes a crater main body. The crater main body 1 has a cylindrical shape, and the base end side (the upper end side in FIG. 1) is a conical tapered surface 1a projecting toward the base end side. Is connected to the blow pipe 10 by bringing the tapered face 1a into close contact with the tapered face 10a of the blow pipe 10. Also, the tapered surface 1a
The recesses 1b, 1c, 1d receiving supply of oxygen, fuel gas, and oxygen from the blowpipe 10 respectively have flow passages 10c, 10d, 10e formed in the tapered surface 10a of the blowpipe 10.
Is formed so as to communicate with each other. Further, recess 1
b, a flow path 1e is formed toward the inner peripheral side of the crater main body 1, and from the recesses 1c, 1d, flow paths 1f, 1g extending toward the tip end side of the crater main body 1, respectively, are substantially coaxial with the crater main body 1. It is arranged in the shape of a loop.
【００１１】符号２は、基端側から火口本体１内に挿入
され、ナット３により抜け止めされたスリーブ２で、ス
リーブ２は円筒状をなし、その中央部には、切断酸素供
給用の流路２ａが、スリーブ２と同軸をなすよう形成さ
れている。また、流路２ａの基端は、吹管１０に形成さ
れた流路１０ｂに連通されるとともに、流路２ａの先端
は、先端側に向けダイバージェント形状をなす切断酸素
噴出孔２ｂとされている。Reference numeral 2 denotes a sleeve 2 which is inserted into the crater main body 1 from the base end side and is prevented from coming off by a nut 3. The sleeve 2 has a cylindrical shape, and a central portion thereof has a flow for supplying cutting oxygen. The passage 2 a is formed so as to be coaxial with the sleeve 2. In addition, a base end of the flow path 2a is communicated with a flow path 10b formed in the blowing pipe 10, and a distal end of the flow path 2a is a cut oxygen ejection hole 2b having a divergent shape toward the front end side. .
【００１２】符号４は、火口本体１の先端に取り付けら
れてスリーブ２の周囲を覆う筒状体で、筒状体４は円筒
状をなし、その周囲は、同じく火口本体１の先端に取り
付けられた、円筒状をなす筒状体５で覆われている。ま
た、スリーブ２と筒状体４との間には、酸素供給用の流
路６が形成されている。流路６の基端は流路１ｅに連結
されるとともに、流路６の先端は、切断酸素噴出孔２ｂ
と同軸をなす輪状に配設された酸素噴出孔群６ａとされ
ている。更に、筒状体４，５の間には、燃料ガス供給用
の流路７が形成されている。流路７の基端は流路１ｆに
連結されるとともに、流路７の先端は、酸素噴出孔群６
ａの径方向外方にて、切断酸素噴出孔２ｂと同軸をなす
輪状に配設された第二の燃料ガス噴出孔群７ａとされて
いる。Reference numeral 4 denotes a tubular body attached to the tip of the crater body 1 and covering the periphery of the sleeve 2. The tubular body 4 has a cylindrical shape, and the periphery thereof is similarly attached to the tip of the crater body 1. Further, it is covered with a cylindrical body 5 having a cylindrical shape. Further, a flow path 6 for supplying oxygen is formed between the sleeve 2 and the cylindrical body 4. The proximal end of the flow path 6 is connected to the flow path 1e, and the distal end of the flow path 6 is connected to the cut oxygen ejection hole 2b.
Oxygen orifice group 6a arranged in a ring shape coaxial with the above. Further, a flow path 7 for supplying fuel gas is formed between the cylindrical bodies 4 and 5. The base end of the flow path 7 is connected to the flow path 1f, and the front end of the flow path 7 is
A second fuel gas ejection hole group 7a arranged in a ring shape coaxial with the cut oxygen ejection holes 2b is provided radially outward of a.
【００１３】符号８は筒状体５の周囲を覆うカバー８
で、カバー８の基端部外周面には、吹管１０の先端部内
周面に形成された雌ねじ部１０ｆと螺合し、カバー８を
含む火口（後述）を吹管１０に取り付けるための雄ねじ
部８ａが螺設されている。また、カバー８の先端部外周
面には、カバー８回動用の、端面視して正六角形状をな
すナット部８ｂが形成されている。更に、ナット部８ｂ
の基端縁には、その外周端から径方向外方に延設され、
火口を吹管１０に取り付けた際にカバー８と吹管１０と
の取付部Ａを先端側から覆う、円盤状の鍔８ｃが形成さ
れている。Reference numeral 8 denotes a cover 8 that covers the periphery of the cylindrical body 5.
On the outer peripheral surface of the base end portion of the cover 8, a male screw portion 8 a is screwed with a female screw portion 10 f formed on the inner peripheral surface of the distal end portion of the blow tube 10 to attach a crater (described later) including the cover 8 to the blow tube 10. Is screwed. In addition, a nut portion 8b for turning the cover 8 and having a regular hexagonal shape as viewed from the end is formed on the outer peripheral surface of the front end portion of the cover 8. Further, the nut portion 8b
The base edge of the is extended radially outward from its outer peripheral end,
When the crater is mounted on the blowpipe 10, a disc-shaped flange 8c is formed to cover the mounting portion A between the cover 8 and the blowpipe 10 from the front end side.
【００１４】また、筒状体５とカバー８との間には、酸
素供給用の流路９が形成されている。流路９の基端は流
路１ｇに連結されるとともに、流路９の先端は、第二の
燃料ガス噴出孔群７ａの径方向外方にて、切断酸素噴出
孔２ｂと同軸をなす輪状に形成された酸素噴出口９ａと
されている。A flow path 9 for supplying oxygen is formed between the cylindrical body 5 and the cover 8. The base end of the flow path 9 is connected to the flow path 1g, and the distal end of the flow path 9 is formed in a ring shape coaxial with the cut oxygen discharge hole 2b outside in the radial direction of the second fuel gas discharge hole group 7a. Is formed as an oxygen jet port 9a.
【００１５】符号６ｂ，７ｂは、筒状体４内にて、流路
６，７から分岐し、それぞれ先端側に向け傾斜して延び
る流路で、これら流路６ｂ，７ｂの先端は、酸素噴出孔
群６ａと第二の燃料ガス噴出孔群７ａとの間にて、筒状
体４の先端面に、筒状体４の周方向に沿って交互に開口
している。その結果、酸素噴出孔群６ａと第二の燃料ガ
ス噴出孔群７ａとの間には、加熱及び燃焼向上用の補助
酸素噴出孔群６ｃと第一の燃料ガス噴出孔群７ｃとが、
全体として切断酸素噴出孔２ｂと同軸をなす輪状を呈す
るよう、交互に配設されている。そして、上記火口本体
１、スリーブ２、ナット３、筒状体４，５、及びカバー
８により、吹管１０より小径の火口１１が形成されてい
る。Reference numerals 6b and 7b denote flow paths which branch off from the flow paths 6 and 7 in the tubular body 4 and extend inclining toward the distal ends, respectively. Opened alternately along the circumferential direction of the cylindrical body 4 at the distal end face of the cylindrical body 4 between the group of injection holes 6a and the second group of fuel gas injection holes 7a. As a result, between the oxygen ejection hole group 6a and the second fuel gas ejection hole group 7a, the auxiliary oxygen ejection hole group 6c for heating and combustion improvement and the first fuel gas ejection hole group 7c are provided.
They are alternately arranged so as to have a ring shape coaxial with the cutting oxygen ejection holes 2b as a whole. The crater body 1, the sleeve 2, the nut 3, the cylindrical bodies 4 and 5, and the cover 8 form a crater 11 having a smaller diameter than the blow pipe 10.
【００１６】鋼材の切断に際しては、まず、火口１１を
吹管１０に取り付けて吹管１０のバルブを開き、流路１
０ｄに燃料ガスを供給し、燃焼ガスを、流路１０ｄ、凹
部１ｃ、流路１ｆ，７，７ｂを介して、第一の燃料ガス
噴出孔群７ｃ及び第二の燃料ガス噴出孔群７ａから噴出
させる。また、ほぼ同時に、流路１０ｃ，１０ｅに酸素
を供給し、酸素を、流路１０ｃ、凹部１ｂ、流路１ｅ，
６，６ｂ、及び流路１０ｅ、凹部１ｄ、流路１ｇ，９を
介して、酸素噴出孔群６ａ、補助酸素噴出孔群６ｃ、及
び酸素噴出口９ａからそれぞれ噴出させる。When cutting steel, first, the crater 11 is attached to the blowpipe 10 and the valve of the blowpipe 10 is opened to open the flow path 1.
The fuel gas is supplied to the first fuel gas ejection hole group 7c and the second fuel gas ejection hole group 7a through the flow path 10d, the concave portion 1c, and the flow paths 1f, 7, and 7b. Let it squirt. Almost simultaneously, oxygen is supplied to the channels 10c and 10e, and oxygen is supplied to the channels 10c, the concave portions 1b, and the channels 1e and 1e.
6, 6b, the flow path 10e, the concave portion 1d, and the flow paths 1g, 9 are respectively ejected from the oxygen ejection hole group 6a, the auxiliary oxygen ejection hole group 6c, and the oxygen ejection port 9a.
【００１７】そして、この状態で火口１１に点火して切
断すべき鋼材を加熱した後、あるいは、上記した燃料ガ
ス及び酸素の供給と同時に、流路１０ｂに酸素を供給
し、流路２ａを介して、切断酸素噴出孔２ｂから高圧で
噴出させる。すると、切断酸素噴出孔２ｂから噴出した
酸素により、超高速の切断酸素噴出流が形成される。ま
た、切断酸素噴出流の周囲には、酸素と燃料ガスにより
２重の加熱炎群が形成される。この際、内側の加熱炎群
が、外側の加熱炎群との相乗効果で伸張するので、切断
酸素噴出流における運動エネルギーの減衰が抑制され
る。従って、切断酸素噴出流のジェット効果が高めら
れ、その結果、切断酸素噴出流によるガス切断を、厚い
鋼材に対しても効率よく行うことができる。In this state, after the crater 11 is ignited to heat the steel material to be cut, or simultaneously with the supply of the fuel gas and oxygen, oxygen is supplied to the flow passage 10b, and the oxygen is supplied through the flow passage 2a. Then, it is ejected at a high pressure from the cut oxygen ejection hole 2b. Then, the oxygen spouted from the cutting oxygen spout 2b forms an ultra-high-speed cutting oxygen spout. A double heating flame group is formed around the cut oxygen jet by the oxygen and the fuel gas. At this time, since the inner heating flame group is extended by a synergistic effect with the outer heating flame group, attenuation of kinetic energy in the cut oxygen jet flow is suppressed. Therefore, the jet effect of the cutting oxygen jet is enhanced, and as a result, gas cutting by the cutting oxygen jet can be efficiently performed even on a thick steel material.
【００１８】また、カバー８と吹管１０との取付部Ａが
鍔８ｃにより先端側から覆われているため、切断に伴い
発生したスラグが火口１１側に飛散しても、取付部Ａへ
のスラグの付着が鍔８ｃにより防止される。従って、取
付部Ａへのスラグの付着による取付部Ａの損傷が防止さ
れ、かつ吹管１０に対する火口１１の着脱作業に支障が
生じることもない。その結果、吹管１０及び火口１１の
寿命が延長されるとともに、吹管１０に対する火口１１
の着脱作業が容易化される。Further, since the mounting portion A between the cover 8 and the blow pipe 10 is covered from the tip side by the flange 8c, even if the slag generated by the cutting is scattered toward the crater 11, the slag to the mounting portion A can be obtained. Is prevented by the flange 8c. Accordingly, damage of the mounting portion A due to the attachment of the slag to the mounting portion A is prevented, and there is no problem in attaching and detaching the crater 11 to and from the blow pipe 10. As a result, the life of the blow pipe 10 and the crater 11 is extended, and
Work of attaching and detaching is facilitated.
【００１９】本発明の第二の実施形態を図３及び図４に
示す。本実施形態では、火口本体１は主として同一部材
からなる一体式とされ、流路１ｆの先端が燃料ガス噴出
孔群とされている。また、流路１ｅ，１ｇの先端は、酸
素供給用の流路６，１３にそれぞれ連結されている。そ
して、火口本体１、スリーブ２、及びスリーブ２抜け止
め用のナット３等により、吹管１０より小径の火口１４
が形成されている。A second embodiment of the present invention is shown in FIGS. In the present embodiment, the crater main body 1 is an integral type mainly composed of the same member, and the tip of the flow path 1f is a fuel gas ejection hole group. The ends of the flow paths 1e and 1g are connected to flow paths 6 and 13 for supplying oxygen, respectively. The crater 14 having a smaller diameter than the blow pipe 10 is formed by the crater body 1, the sleeve 2, and the nut 3 for preventing the sleeve 2 from coming off.
Are formed.
【００２０】また、符号１５は、火口１４の最外周部に
その先端１２側から着脱自在に嵌合され、火口１４を吹
管１０に取り付けるための取付ナットで、取付ナット１
５は、図４に示すように、吹管１０より小径の円筒状を
なし、かつその基端部外周面には、吹管１０の先端部内
周面に形成された雌ねじ部１０ｆと螺合し、火口１４を
吹管１０に取り付けるための雄ねじ部１５ａが螺設され
ている。また、取付ナット１５の先端部外周面には、取
付ナット１５回動用の、端面視して正六角形状をなすナ
ット部１５ｂが形成されている。更に、ナット部１５ｂ
の基端縁には、その外周端から径方向外方に延設され、
火口１４を吹管１０に取り付けた際に取付ナット１５と
吹管１０との取付部Ａを先端側から覆う、円盤状の鍔１
５ｃが形成されている。Reference numeral 15 denotes a mounting nut which is detachably fitted to the outermost peripheral portion of the crater 14 from the tip 12 side thereof, and which is used to mount the crater 14 to the blowpipe 10.
As shown in FIG. 4, 5 has a cylindrical shape smaller in diameter than the blowpipe 10, and its outer peripheral surface is screwed with a female screw portion 10f formed on the inner peripheral surface at the distal end of the blowpipe 10, thereby forming a crater. An external thread 15 a for attaching the pipe 14 to the blow pipe 10 is screwed. A nut portion 15b for turning the mounting nut 15 and having a regular hexagonal shape when viewed from the end is formed on the outer peripheral surface of the distal end portion of the mounting nut 15. Further, the nut portion 15b
The base edge of the is extended radially outward from its outer peripheral end,
When the crater 14 is attached to the blowpipe 10, the disc-shaped flange 1 covers the mounting portion A between the mounting nut 15 and the blowpipe 10 from the tip side.
5c is formed.
【００２１】本実施形態の火口１４では、流路２ａの先
端に形成された切断酸素噴出孔（図示せず。）から噴出
する酸素により切断酸素噴出流を形成するとともに、流
路６の先端に形成された酸素噴出孔群（図示せず。）か
ら酸素を噴出する。また、上記燃料ガス噴出孔群から噴
出する燃焼ガスと、流路１３の先端に形成された酸素噴
出口（図示せず。）から噴出する酸素等により、加熱炎
群を形成する。そして、これら切断酸素噴出流や加熱炎
群等により、鋼材が効率的にガス切断される。In the crater 14 of the present embodiment, a cut oxygen jet is formed by oxygen jetted from a cut oxygen jet hole (not shown) formed at the end of the flow path 2 a, and at the end of the flow path 6. Oxygen is ejected from the formed oxygen ejection hole group (not shown). Further, a combustion flame group is formed by the combustion gas ejected from the fuel gas ejection hole group and oxygen ejected from an oxygen ejection port (not shown) formed at the end of the flow path 13. Then, the steel material is efficiently cut by the cutting oxygen jet stream, the heating flame group, and the like.
【００２２】また、取付ナット１５と吹管１０との取付
部Ａが鍔１５ｃにより先端側から覆われているため、切
断に伴い発生したスラグが火口１４側に飛散しても、取
付部Ａへのスラグの付着が鍔１５ｃにより防止される。
従って、本実施形態においても、取付部Ａへのスラグの
付着による取付部Ａの損傷が防止され、かつ吹管１０に
対する火口１４の着脱作業に支障が生じることもない。
その結果、吹管１０及び火口１４の寿命が延長されると
ともに、吹管１０に対する火口１４の着脱作業が容易化
される。Further, since the mounting portion A between the mounting nut 15 and the blow pipe 10 is covered from the tip side by the flange 15c, even if the slag generated by the cutting is scattered to the crater 14 side, the mounting portion A The attachment of the slag is prevented by the flange 15c.
Therefore, also in the present embodiment, damage to the mounting portion A due to the attachment of the slag to the mounting portion A is prevented, and there is no problem in attaching and detaching the crater 14 to and from the blowpipe 10.
As a result, the life of the blow pipe 10 and the crater 14 is extended, and the work of attaching and detaching the crater 14 to and from the blow pipe 10 is facilitated.
【００２３】なお、本発明は上記実施形態に限定される
ものではなく、具体的な使用環境等に応じ、本発明の趣
旨を逸脱しない範囲で、任意に変更可能であることは言
うまでもない。例えば、上記の各実施形態において、酸
素噴出口を、切断酸素噴出孔と同軸をなす輪状に配設さ
れた複数の酸素噴出孔群（第二の酸素噴出孔群）として
もよい。It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be arbitrarily changed according to the specific use environment and the like without departing from the gist of the present invention. For example, in each of the above embodiments, the oxygen outlet may be a plurality of oxygen outlet groups (second oxygen outlet group) arranged in a ring shape coaxial with the cut oxygen outlet.
【００２４】また、上記した第一の実施形態では、酸素
噴出孔群６ａや第二の燃料ガス噴出孔群７ａを、スリー
ブ２や筒状体４の先端を周方向に沿って間欠的に切り欠
くことにより形成しているが、必要に応じ、これらの孔
を、切断酸素噴出孔２ｂと同軸をなす輪状に配設された
複数の円孔としてもよい。In the above-described first embodiment, the oxygen injection hole group 6a and the second fuel gas injection hole group 7a are intermittently cut along the circumferential direction at the distal end of the sleeve 2 or the cylindrical body 4. These holes are formed by cutting, but if necessary, these holes may be formed as a plurality of circular holes arranged in a ring shape coaxial with the cutting oxygen ejection hole 2b.
【００２５】[0025]
【発明の効果】以上説明した通り、本発明によれば、カ
バーまたは取付ナットと吹管との取付部の損傷が防止さ
れ、かつ取付部へのスラグの付着により吹管に対する火
口の着脱作業に支障が生じることもないため、吹管及び
火口の寿命が延長されるとともに、吹管に対する火口の
着脱作業が容易化されるという効果が得られる。As described above, according to the present invention, damage to the mounting portion between the cover or the mounting nut and the blow pipe is prevented, and adhesion of the slag to the mounting section hinders the work of attaching and detaching the crater to the blow pipe. Since there is no occurrence, the service life of the blowpipe and the crater is extended, and the effect of facilitating the work of attaching and detaching the crater to the blowpipe is obtained.
【図１】 本発明の第一の実施形態を説明するための、
吹管の先端部及び火口の一部断面図である。FIG. 1 is a view for explaining a first embodiment of the present invention;
It is a fragmentary sectional view of the tip part and the crater of the blowpipe.
【図２】 図１に示す吹管及び火口の、図１の矢印Ｉに
沿った正面図である。FIG. 2 is a front view of the blow pipe and the crater shown in FIG. 1 along an arrow I in FIG. 1;
【図３】 本発明の第二の実施形態を説明するための、
吹管の先端部及び火口の一部断面図並びに取付ナットの
側面図である。FIG. 3 is a view for explaining a second embodiment of the present invention;
It is a partial sectional view of a tip part and a crater of a blowpipe, and a side view of a mounting nut.
【図４】 図３に示す取付ナットの一部断面図である。FIG. 4 is a partial sectional view of the mounting nut shown in FIG. 3;
２ｂ 切断酸素噴出孔 ６ａ 酸素噴出孔群 ７ａ 第二の燃料ガス噴出孔群（燃料ガス噴出孔群） ７ｃ 第一の燃料ガス噴出孔群（燃料ガス噴出孔群） ８ カバー ８ｂ，１５ｂ ナット部 ８ｃ，１５ｃ 鍔 ９ａ 酸素噴出口 １０ 吹管 １１，１４ 火口 １５ 取付ナット 2b Cutting oxygen outlet 6a Oxygen outlet 7a Second fuel gas outlet (fuel gas outlet) 7c First fuel gas outlet (fuel gas outlet) 8 Cover 8b, 15b Nut 8c , 15c Flange 9a Oxygen outlet 10 Blowing tube 11, 14 Crater 15 Mounting nut
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ２３Ｋ 103:04 Ｂ２３Ｋ 103:04 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI theme coat ゛ (Reference) B23K 103: 04 B23K 103: 04
Claims (4)
切断酸素噴出孔を中心として内側から、酸素噴出孔群
と、燃料ガス噴出孔群と、酸素噴出口とが、上記切断酸
素噴出孔と同軸をなす輪状に配設され、上記切断酸素噴
出孔から噴出する高圧の気流により鋼材を切断する高圧
高速切断火口において、 上記火口が、その最外周部に形成されたカバーを介し
て、上記火口より大径の、酸素及び燃料ガス供給用の吹
管の先端に着脱自在に取り付けられるとともに、 上記カバーに、その外周端から径方向外方に延設され、
上記吹管への上記火口の取付時に上記カバーと上記吹管
との取付部を先端側から覆い、上記鋼材の切断に伴い発
生するスラグの上記取付部への付着を防止する鍔を設け
たことを特徴とする高圧高速切断火口。1. A cutting oxygen ejection hole is opened at a tip end surface, and an oxygen ejection hole group, a fuel gas ejection hole group, and an oxygen ejection hole are formed from the inside around the cutting oxygen ejection hole by the cutting oxygen ejection hole. In a high-pressure high-speed cutting crater that is disposed in a ring shape coaxial with the hole and cuts the steel material by a high-pressure airflow ejected from the cutting oxygen ejection hole, the crater has a cover formed on the outermost peripheral portion thereof. A larger diameter than the crater, which is detachably attached to the tip of the oxygen and fuel gas supply blowpipe, and which extends radially outward from the outer peripheral end of the cover,
When attaching the crater to the blowpipe, a flange that covers the attachment portion between the cover and the blowpipe from the tip side and prevents slag generated due to cutting of the steel material from attaching to the attachment portion is provided. And high pressure high speed cutting crater.
酸素噴出孔を中心として内側から、酸素噴出孔群と、燃
料ガス噴出孔群と、酸素噴出口とが、上記切断酸素噴出
孔と同軸をなす輪状に配設され、上記切断酸素噴出孔か
ら噴出する高圧の気流により鋼材を切断する高圧高速切
断火口において、 上記火口が、その最外周部に着脱自在に嵌合される取付
ナットを介して、この取付ナットより大径の、酸素及び
燃料ガス供給用の吹管の先端に着脱自在に取り付けられ
るとともに、 上記取付ナットに、その外周端から径方向外方に延設さ
れ、上記吹管への上記火口の取付時に上記取付ナットと
上記吹管との取付部を先端側から覆い、上記鋼材の切断
に伴い発生するスラグの上記取付部への付着を防止する
鍔を設けたことを特徴とする高圧高速切断火口。2. A cutting oxygen ejection hole is opened at a front end surface, and the oxygen ejection holes, the fuel gas ejection holes, and the oxygen ejection hole are formed from the inside with the cutting oxygen ejection hole as the center from the cutting oxygen ejection hole. A high-pressure, high-speed cutting crater that is disposed in a ring shape coaxial with the cutting tool and cuts a steel material by a high-pressure airflow spouted from the cutting oxygen ejection hole, wherein the crater is detachably fitted to an outermost peripheral portion thereof. Attached to the tip of an oxygen and fuel gas supply blowing pipe having a diameter larger than that of the mounting nut through the mounting nut, and detachably attached to the mounting nut, extending radially outward from the outer peripheral end of the blowing nut, When attaching the crater to the mounting portion of the mounting nut and the blowpipe is covered from the tip side, a flange is provided to prevent the slag generated due to the cutting of the steel material from attaching to the mounting portion. High pressure high speed cutting Mouth.
れた、上記カバー回動用のナット部の基端縁に形成され
ていることを特徴とする請求項１に記載の高圧高速切断
火口。3. The high-pressure, high-speed cutting crater according to claim 1, wherein the flange is formed at a base end of a nut portion for turning the cover, which is formed on an outer peripheral surface of the cover. .
成されていることを特徴とする請求項２に記載の高圧高
速切断火口。4. The high-pressure, high-speed cutting crater according to claim 2, wherein the flange is formed at a base end of the mounting nut.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001165740A JP3435150B2 (en) | 2001-05-31 | 2001-05-31 | High pressure high speed cutting crater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001165740A JP3435150B2 (en) | 2001-05-31 | 2001-05-31 | High pressure high speed cutting crater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002357307A true JP2002357307A (en) | 2002-12-13 |
| JP3435150B2 JP3435150B2 (en) | 2003-08-11 |
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ID=19008373
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809157A (en) * | 2012-08-28 | 2012-12-05 | 北京中气华辰新能源技术开发有限公司 | Oxyhydrogen gas cutting gun and cutting nozzle thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3042566U (en) | 1997-04-16 | 1997-10-21 | 株式会社イトーコー | Cutting torch crater |
-
2001
- 2001-05-31 JP JP2001165740A patent/JP3435150B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809157A (en) * | 2012-08-28 | 2012-12-05 | 北京中气华辰新能源技术开发有限公司 | Oxyhydrogen gas cutting gun and cutting nozzle thereof |
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| Publication number | Publication date |
|---|---|
| JP3435150B2 (en) | 2003-08-11 |
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