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Патент USA US3031188

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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
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2 Sheets-Sheet 2
66
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68
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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.
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