Патент USA US3031188код для вставки
April 24, ‘1962 H. A. WHITE, JR - 3,031,178 BLOWPIPE Filed Sept. 9, 1960 2 Sheets-Sheet l INVENTOR HERBERT A. WHITE Jr. 51/ Attorney ’ April 24, 1962 H, A, wHn'E, JR 3,031,178 BLOWPIPE Filed Sept. 9, 1960 4a 60 / 2 Sheets-Sheet 2 66 / 1 ' 4: 68 3m E- \ 54 T’ Z. 76 //Vl/E/VTOR HERBERT A. WHITE Jr. By A Mar/13y 3,031,178 Patented Apr. 24, 1962 2 3,031,178 BLOWPIPE Herbert A. White, In, Pittsburgh, Pa, assignor to Essco lator Manufacturing Corporation, a corporation of Pennsylvania Filed Sept. 9, 1960, Ser. No. 54,871 2 Claims. (Cl. 266-41) nace end of the tube 30. An opening 34 is provided in the tube 30 to permit charging of space 36 between tubes 18 and 30 with light weight insulation 37, such as vermiculite. The opening 34 is closed in any suitable manner, such as by welding a plug therein, after the space 36 is ?lled with insulation. Four equally spaced angle irons 38, preferably made of mild steel, have their legs welded to the tube 30 along the length thereof. This invention relates to a blowpipe and more par The ‘angle irons 38 serve as reinforcement and also aid time a tuyere is changed or the furnace banked and the e?iciency of the workmen is poor the annual labor cost concave surface 8, a reduced diameter portion 52 on ticularly to a blowpipe for insertion between the tuyeres 10 in protecting the blowpipe from damage when it is dropped. When the blowpipe 12 is in place the lowest and gooseneck of a blast furnace for producing iron. angle iron may be slightly displaced to one side of The blowpipes commonly used have solid walls of cast the veitical plane through the center of the blowpipe as iron, steel or stainless steel, and weigh approximately shown in FIGURE 1 in order to obtain greater clearance 180 to 200 pounds. The air passing through the blow pipe to the tuyere is heated so that the blowpipe also 15 for the tuyere cooling water pipes. FIGURES 4, 5 and 6 show a modi?ed blowpipe 40 of becomes hot. There is also loss of heat through the slightly different construction. In this embodiment an blowpipe wall so that the air blast temperature is some inner tube 42, preferably of stainless steel, and an outer what reduced and heat is radiated to the surrounding tube 44, preferably of mild steel, extend between L atmosphere. This makes working conditions very dis agreeable and results in accidents. In most cases the 20 shaped end pieces 46 and 48, preferably made of cast steel. End piece 46 is located at the furnace end of the key pin is knocked out permitting the blowpipe to fall blowpipe and has a spherical convex surface 50 matching to the ?oor. Since the blowpipe must be removed every its inner surface for receiving tube 42 and a reduced is high. There is also considerable loss in production 25 diameter portion 54 on its outer surface for receiving tube 44. End piece 48 has a spherical concave surface due to the time required to replace the blowpipe. 56 matching convex surface 14, a reduced diameter por It is therefore an object of my invention to provide a tion 58 on its inner surface for receiving tube 42 and a blowpipe which is much lighter in weight than the con reduced diameter portion 60 on its outer surface for re ventional blowpipe and yet is insulated to prevent loss 30 ceiving tube 44. Four bolt holes 62 and 64 are provided of heat to the surrounding atmosphere. in end piece 46 and 48, respectively, for receiving the This and other objects will be more apparent after ends of shoulder bolts 66. A hole 68 is provided in tube referring to the following speci?cation and attached draw 44 to permit charging of insulation 69 into space 70 be ings, in which: tween tubes 42 and 44. The opening '70 can be closed FIGURE 1 is a view, partly in section, of the blow 35 in any suitable manner after the insulation is in place. pipe of my invention installed in a blast furnace; In assembling the blowpipe 40, the tubes 42 and 44 and FIGURE 2 is a view, partly in section, showing de shoulder bolts 66 are placed in position on one of the tails of the blowpipe; end pieces 46 or 48 and the other end piece brought FIGURE 3 is a view taken on the line III-III of into position. Nuts 72 are then tightened to lock the FIGURE 2; parts in position. If desired the tubes 42 and 44 may FIGURE 4 is a sectional view showing a second modi also be welded to end pieces 46 and 48. ?cation of my invention; While two embodiments of my invention have been FIGURE 5 is an end view of the blowpipe of FIGURE shown and described, it will be apparent that other adap 4; and ‘ tations and modi?cations may be made without departing FIGURE 6 is a view taken on the line VI—-VI of FIG from the scope of the following claims. 45 URE 4. I claim: Referring more particularly to FIGURES 1 to 3 of 1. A blowpipe for insertion between the tuyere and the drawings, reference numeral 2 indicates the wall of a penstock ?ange of a blast furnace comprising a stain blast furnace having an opening therein for a tuyere less steel inner tube, a mild steel outer tube surrounding cooler 4. A tuyere 6 is received in the tuyere cooler 4 in the usual manner. A concave seat 8 is provided on 50 said inner tube in spaced relationship therewith, a fer rous metal end piece at each end of said tubes extending the tuyere 6 around blast opening 10 for receiving one from said inner tube to said outer tube and closing the end of a blowpipe 12. The other end of the blowpipe 12 is supported on a convex seat 14 on the furnace end of penstock ?ange 16. It will be understood that the pen stock ?ange may be replaced by other supporting means and the term will be used hereafter in this broad sense. ends thereof, the outer surface of the end piece adjacent said tuyere tapering inwardly toward the tuyere end there of, means connecting each of said tubes to each of said end pieces, insulation in the space between said tubes, and reinforcing members extending longitudinally of said blowpipe and fastened to said outer tube in spaced rela inner tube 18, preferably made of stainless steel, which tionship around the periphery thereof. provides an air blast opening 20. A tapered sleeve 22, 2. A blowpipe for insertion between the tuyere and preferably made of mild steel, is welded to the outside of 60 penstock ?ange of a blast furnace, said tuyere having a tube 18 at the furnace end thereof. The taper on the According to my invention the blowpipe 12 includes an outside of sleeve 22 provides more clearance for the blowpipe 12 within the cooler 4. The furnace ends of concave surface for receiving one end of said blowpipe and said penstock ?ange having a convex surface for re cent ?ange 16. A concave spherical surface 28, matching tubes extending from said inner tube to said outer tube and closing the ends thereof, one of said end pieces hav ceiving the other end of said blowpipe, said blowpipe tube 18 and sleeve 22 are provided with a spherical con vex surface 24 which matches and is received in the 65 comprising a stainless steel inner tube, a mild steel outer tube surrounding said inner tube in spaced relationship concave seat 8. A sleeve 26, preferably made of mild therewith, a ferrous metal end piece at each end of said steel, is ‘welded to the outside of tube 18 at the end adja the convex seat 14, is provided on the end of sleeve 26. A tapered tube 30, preferably of mild steel, is welded 70 ing a convex surface for insertion into the concave sur to the outside of sleeves 22 and 26, a cut out 32 prefer face of said tuyere and the other end piece having a ably being provided on sleeve 22 for receiving the fur concave surface for insertion into the convex surface of 3,031,178 4 said penstock ?ange, the outer surface of the end piece adjacent said tuyere tapering inwardly toward the tuyere References Cited in the ?le of this patent end thereof, means connecting each of said tubes to each of said end pieces, insulation in the space between said UNITED STATES PATENTS 2,023,025 McKee _____________ __ Dec. 3, 1935 235,316 FOREIGN PATENTS Great Britain _________ __ June 15, 1925 tubes, and reinforcing members extending longitudinally 5 of said blowpipe and fastened to said outer tube in spaced relationship around the periphery thereof.