JPS6445150U

JPS6445150U -

Info

Publication number: JPS6445150U
Application number: JP19658687U
Authority: JP
Priority date: 1987-12-24
Filing date: 1987-12-24
Publication date: 1989-03-17

Description

[Brief explanation of the drawing]

第１図は製鋼炉の炉底に設けられた従来の２重
管方式ガス吹込み羽口の縦断面図、第２図は従来
の単管方式ノズルの縦断面図、第３図は従来の複
合管羽口の横断面図であり、第４図ａ，ｂはこの
考案に用いる芯管の加工途中における縦断面図と
横断面図、第５図はこの考案による芯管の要部断
面図であり、第６図は扇形孔を有する場合の変形
例の横断面図である。３……内管、４……外管、１０……中空円筒部
材、１１′……多重らせん孔。 Figure 1 is a vertical cross-sectional view of a conventional double-tube type gas injection tuyere installed at the bottom of a steelmaking furnace, Figure 2 is a vertical cross-sectional view of a conventional single-tube type nozzle, and Figure 3 is a vertical cross-sectional view of a conventional FIG. 4 is a cross-sectional view of a composite tube tuyere, and FIGS. 4a and 4b are longitudinal and cross-sectional views of the core tube used in this invention during processing, and FIG. 5 is a sectional view of essential parts of the core tube according to this invention. FIG. 6 is a cross-sectional view of a modified example in which a fan-shaped hole is provided. 3...Inner tube, 4...Outer tube, 10...Hollow cylindrical member, 11'...Multiple spiral holes.

補正昭６３．１．２２実用新案登録請求の範囲を次のように補正する
。Amendment January 22, 1983 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】精錬用ガスの吹込み孔を有する芯管と、この芯
管の外周に対し環状すき間を形成しこれを保護ガ
ス通路とする外管とよりなる２重管羽口にして、芯管が、その管軸のまわりで多重つる巻き状を
なしてその全長にわたる、互いに独立した複数の
円形断面をもつらせん孔を有し、これらのらせん
孔の終端を芯管の端面に開口させてなるものとし
た、ことを特徴とする、精錬用ガス吹込み羽口。図面の簡単な説明を次のように補正する。明細書第１２頁第８〜９行の「あり、」を「あ
る。」に訂正し、明細書第１２頁第１０〜１１行
の「第６図は……である。」を削除する。[Claim for Utility Model Registration] A double-pipe tuyere consisting of a core pipe having a refining gas blowing hole and an outer pipe that forms an annular gap around the outer periphery of the core pipe and uses this as a protective gas passage. In this case, the core tube has a plurality of mutually independent coils extending over its entire length in a multiple helical shape around the tube axis.
A refining gas blowing tuyere characterized in that it has spiral holes with a circular cross section, and the ends of these spiral holes are opened at the end face of a core pipe. The brief description of the drawing has been amended as follows. "Aru" in lines 8-9 of page 12 of the specification is corrected to "aru." and "Fig. 6 is..." in lines 10-11 of page 12 of the specification is deleted.

Claims

[Claim for Utility Model Registration] A double-pipe tuyere consisting of a core pipe having a refining gas blowing hole and an outer pipe that forms an annular gap around the outer periphery of the core pipe and uses this as a protective gas passage. The core tube has a plurality of mutually independent spiral holes extending over its entire length in a multiple helical shape around the tube axis, and the ends of these spiral holes are opened at the end surface of the core tube. A refining gas injection tuyere characterized by: