pa1778data.pdf
pa1778data.pdf
pa1778data.pdf
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U.S. STEEL DUQUESNE WORKS<br />
HAER No. PA-115<br />
(Page 139)<br />
6. Large and Small Bell Hydraulic Cylinders: The Koppers<br />
hydraulic cylinders for the large and small bell are laid out<br />
linearly on a east-west axis in the center of the 1953 extension<br />
at the southern end of the hoist house building. The<br />
approximately 19 ! -0" high large bell hydraulic cylinder has a 50"<br />
diameter. The i6'-6" high small bell hydraulic cylinder has a<br />
38" diameter. The top of each cylinder is attached to a steel<br />
cable which runs from the hoist house to the large or small bell<br />
at the furnace top. The introduction or retraction of compressed<br />
air into or from the cylinders forces them to move up or down,<br />
thereby opening or closing the bells at the top of the furnace.<br />
Installation Date: 1953.<br />
7. Air Receiver and Associated Piping: Located<br />
approximately 5 ! -0" south of the large and small bell hydraulic<br />
cylinders is an approximately 4'-0" diameter x 9'-8" high air<br />
receiver manufactured by the Quaker City Iron Works of<br />
Philadelphia, PA in 1953. The receiver, which stores compressed<br />
air, has a system of small compressed air pipes connecting it to<br />
the hydraulic cylinders.<br />
Installation Date: 1953.<br />
8. Counterweight Hoist Tower: The counterweight hoist tower<br />
is located approximately 3'-0" east of the air receiver in the<br />
center of the 1953 hoist house extension. See item number III -<br />
A - 11 for description.<br />
C. Furnace Top:<br />
1. Large Bell Hopper: See I - C - 1 for description.<br />
Installation Date: 1968.<br />
2. Large Bell: The large bell is 14'-0" in diameter x 9*-5"<br />
high and is located about the centerline of the blast furnace.<br />
It is attached by a 8" diameter rod to a lever arm which is<br />
connected to and operated by the steel cable leading from the 50"<br />
diameter hydraulic cylinder located in the hoist house.<br />
Construction Date: 1953.<br />
3. Small Bell Hopper: The small bell hopper sits above the<br />
small bell at the top of the furnace. It is S'-l" high with a<br />
top inside diameter of 6'-0", tapering downwards to a bottom<br />
inside diameter of 5'-3". The flange surrounding the top of the<br />
hopper is 11" wide.<br />
Installation Date: 1953.<br />
4. Small Bell: The 6'-0» diameter x 3'-l 1/2" high small<br />
bell is located directly above the large bell. It is attached by<br />
a 4" diameter rod to a lever arm which is connected to and