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Патент USA US3052229

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Sept- 4, 1962
Filed Nov. 16, 1960
United States Patent ()?tice
Fred Haack, Jr., 2700 N. Campbell Ave., Chicago, Ill.
Filed Nov. 16, 1960, Ser. No. 69,675
3 Claims. (Cl. 122—6.6)
Fatented Sept. 4, 1962
system and the other the outlet. The valves 24 control
the rate of ?ow from the source to the tuyere nose.
It is a feature of this invention to provide a practical
means of constructing a renewable nose piece and secur
ing the same to the main tuyere body.
To this end, the coil springs 19 and 20 maintain en
gagement of the nose piece with the end of the tuyere
and holds the same against any displacing force to which
it might be subjected in normal use. The spring con
This invention relates to new and useful improvements
in tuyeres for blast furnaces or the like, and it is among
the objects thereof to provide a tuyere with a renewable
nose piece with means for maintaining proper alignment 10 struction, however, allows for expansion and contraction
of the conduits 7 and 7a so that the threads 14 and 15
thereof with the tuyere body and means for fastening the
of the ends of these conduits will not be stripped, which
nose piece to the tuyere body by the conduits that deliver
would of course destroy the nose piece also. When the
the cooling ‘medium for circulation in the tip.
nose piece, which is exposed to the extreme heat of the
It is a further object of the invention to provide a
tuyere of the above-designated character in which a cool 15 furnace, is renewed the ducts 7 and 7a are unscrewed and
a new nose piece inserted in the grooves 8 of the tuyere
ing medium such as water is circulated through both the
ends. Because of the chamfered tongue and groove effect
tuyere body and the nose piece from a common source
of the interacting nose and tuyere body ends, they are
through separate ?ow paths provided in the tuyere struc
properly seated to bring the threads in alignment with
tapered wall portion 3 by which it is mounted in the wall
washers resting thereon the top of said sleeves constitut
ing spring seats and a spring disposed between said
It is a further object of the invention to utilize spring 20 the conduits as they extend through the top opening of the
means for mounting the water circulating conduits to
Although one embodiment of the invention has been
allow for expansion and contraction at the threaded ends
herein illustrated and described, it will be evident to those
of the conduits.
skilled in the art that various modi?cations may be made
These and other objects of the invention will become
more apparent from a consideration of the accompany 25 in the details of construction without departing from the
principles herein set forth.
ing drawing constituting a part hereof in which like refer
I claim:
ence characters designate like parts and in which:
1. In a tuyere structure a tuyere housing of conical
FIGURE 1 is a top plan view of a two-piece tuyere
shape for mounting in the wall of a furnace, said housing
structure embodying the principles of this invention;
FIGURE 2 a cross-sectional view, partially in eleva 30 having an annular cooling chamber, a nose piece con
stituting a wall of said chamber, a plurality of sleeves
tion, showing the main tuyere body and renewable nose
abutting the end of the nose piece and extending to the
piece attached to the body by conduits; and
top of the tuyere body, a plurality of conduits disposed in
FIGURE 3 a side elevation of a fragmentary portion
said sleeves having threaded ends engaging threaded open
of the tuyere and water circulating means.
ings in said nose piece, the upper end of said conduits
In the drawing the numeral 1 designates a main tuyere
being provided with ?anges constituting spring seats,
body having a renewable nose piece 2 and having a
of a blast furnace, cupola or other industrial metal melt
ing furnace structures. The nose piece 2 has a flow cham
ber 4 and the body portion has a flow chamber 5 with
a sleeve 6 built therein to receive a conduit 7, there being
two of such sleeves and conduits as shown. The main
Washers on said ‘sleeves and the ?ange on said conduits
to maintain tension of the nose piece against the tuyere
body while permitting expansion and contraction of the
conduits without stripping the threaded ends thereof, a
body 1 of the tuyere is provided with a recessed end
portion 8 for seating the projecting portion 9 of the nose
plurality of threaded openings at the outer end of the
7 and 7a are connected to a source of coolant such as
water and to a drain, respectively, so as to effect ‘a con
of coolant and to the same ‘drain with flow control means
tinuous circulation of the coolant in the annular cham
said annular nose piece chamber and the cooling chamber
of the main body of the tuyere.
tuyere for receiving cooling pipe, means connecting said
2, the end of which abuts the end of the body 1, as 45 pipes to a source of coolant and a drain, said connecting
means being connected to the conduits leading to the nose
shown at 10. The nose piece 2 is secured by means of
pieces of the tuyere and valves disposed between said
sleeves 7 and 7a having shoulders or ?anges 11 and 12
conduits and connecting means to control the flow of the
with pipe threads 14 and 15 at their extended end that
coolant to the nose pieces of the tuyeres.
?t into threaded openings 16 of the nose piece ‘2. The
2. A tuyere structure as set forth in claim 1 in which
top ends of the sleeves 7 and 7a are provided with Washers 50
nose piece is secured by copper tubing yieldingly
17 and 18 that constitute seats for springs 19 and 20 that
mounted by coil springs on the main body of the tuyere.
rest against ?anges 11 and 12.
‘3. A tuyere structure as set forth in claim 1 in which
As is apparent from FIGURE 2 of the drawing, the
the ends of said pair of conduits extend into an annular
nose chamber 4 is an annular chamber and the tuyere 55 chamber in the nose piece and an annular chamber in the
body chamber 5 is an annular chamber and the conduits
tuyere body is connected independently to the same source
ber 4. Similarly, the main body chamber 5 is connected
by pipe 21 having a pipe threaded connection 22 with the
cap of the tuyere it places spaced from the ducts 7 and 7a
by an L piece 23 and a valve 24, the L 23 being con
nected to the pipe 7 and the valve 24 being connected to
a T 25 to which the pipe 21 is connected at one end and 6
the top of which is connected at 26 to a source of coolant
such as water under pressure. The construction of the
double flow system is identical at both connections with
the tuyeres, the one constituting the inlet of the cooling
for independently regulating the ?ow of coolant through
References Cited in the ?le of this patent
Mackey _____________ __ Apr. ‘30, 1878
Aurin et al. __________ __ Feb. 21, 1956
Great Britain ________ __ Nov. 22, 1917
France ______________ __ Dec. 22, 1931
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