176

THE COLLIERY GUARDIAN.

January 22, 1915.

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Fig. 6.—General View

of Receivers and Feed-water Heater.



Fig. 5.—Steam Connections to Turbines.

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Plan

Figs. 7 and 8.—Sectional Side Elevation and Plan of Engine House and Fan Drive.

a special earthing panel (which is connected, to two
earth plates) so arranged that periodical tests can be
made to ascertain if the earthing of the system is
satisfactory.

The fan, which has been installed to take the place of
the furnace which originally ventilated the mine, is of
the “ Sirocco ” double-inlet type of 400,000 cu. ft.
capacity per minute at in. water gauge, and runs at a
speed of about 244 revolutions per minute. The fan is
fitted with reversing devices so that the air current can
be reversed if desired.

The fan is driven by a Beiliss and Morcom triple-
expansion engine of 760 effective horse power, running
at a speed of about 244 revolutions per minute. The
engine is fitted with governor, and the exhaust steam
from this engine can be taken either into the atmosphere,
or into the exhaust steam accumulators as desired.

The above-mentioned machinery is accommodated in
a power house 61 ft. long by 37 ft. wide. Access to the
power house is obtained from the ground level, and also
by a staircase to the turbine floor. The building is of
brick, with slated roof supported by steel principals.
The inside of the roof is sarked and fitted with Boyles’
ventilators. Florentine flooring, by Messrs. Newalls
Insulation Company Limited, is provided, and the walls
up to the underside of the windows are fitted with tiles
supplied by Messrs. Minton, Hollins and Company, of
Stoke-on-Trent, and these give quite a neat finish to the
whole building.

An overhead travelling crane of the double-girder
type to lift 10 tons, manufactured by Messrs. Herbert
Morris Limited, of Loughborough, is in the turbo-
generator house. The main cables are taken overhead
from the power house at No. 3 pit, and taken down
Nos. 1 and 2 pits to the shaft bottom. The overhead
cables are supported by H poles, all cables being
suitably guarded. The shaft cables are in all cases
double-wire armoured, in accordance with the Home
Office requirements, and they are supported by cleats in
the shaft.

The exhaust steam from the fan engine, surface
haulage engine (and later from the new winding engine
at No. 3 shaft), is taken by riveted steel pipes to an
arrangement of receivers, consisting of the shells of
three old Lancashire boilers, 30 ft. long by 7 ft. wide.
A fourth boiler is utilised as a feed-water heater, and a
fifth boiler as a low-pressure steam receiver for the
old winding engine, but this will later on be turned into
an exhaust steam receiver when the new winding engine
is installed. The boilers have been retained in their
original brick seatings, but a slight modification has
been made in the flues, so that a portion of the hot
gases from the new battery of boilers passes through
the steam receivers and thereby superheats the exhaust
steam. This arrangement will be of special advantage
when later on the surplus exhaust from No. 3 pit is
taken over to No. 1 pit (a distance of about 900 ft.),
where it is intended to instal a mixed pressure turbo
compressor.

There is an oil separator in the main exhaust steam
range near the fan engine to remove as much of the oil