Improved Means for Improving Circulation of Water in Steam Boilers.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improved Means for Improving Circulation of Water in Steam Boilers.
JOHN RICHARD, RHODES, 43, Barton Arcade, Manchester, Managing Director
Engineering Co., do hereby declare the nature of this invention to be as follows:-
An attachment to the cross flue tubes of internally fired steam boilers extend-
ing above the surface of the water into the steam space-bifurcated or divided
into two or more sections, one or more of which are sealed, and the others open
used with or without a jet of steam-for the purpose of directing & controlling
the convection currents and increasing the circulation in the cross flue tubes of
such boilers.
COMPLETE SPECIFICATION.
Improved Means for Improving Circulation of Water in Steam Boilers.
1, JOHN RICHARD RHODES, Managing Director to The Steam Boilers Circulators
Company Limited, of 43, Barton Arcade, Manchester, in the County of Lancaster,
do hereby declare the nature of this invention and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement and accompanying drawings:-
My said invention has reference to improvements in steam generators and
relates particularly to improved means for increasing the circulation of water.
in steam generators provided with cross water tubes or tubes of the "Galloway"
type.
In an invention for which I have obtained Her Majesty's Letters Patent
No. 5688 of 1892, to which the reader is, referred, I describe an improved appli-
ance or duplex dome, for application to the cross tubes of steam generators,
designed to set up or assist the water circulation, and it is to this type of water
circulator that my invention refers.
The object of the present invention is to produce a circulator which shall be
readily applicable to boilers having a stay extending from end to end.
My invention will be clearly understood from the following description, when
read in conjunction with the annexed sheet of drawings in which:
Fig. 1 is a sectional view of one half of my improved water circulator or
appliance, together with a flanged ring designed to sit on the top of the cross tube
and to carry the circulator.
Fig. 2 is a side view of the complete appliance.
Fig. shows a modification in the form of flanged ring for supporting the
circulator such ring being designed to fit a cross tube inserted at an angle.

page_text: In a water circulating appliance, constructed in accordance with my invention,
1 employ a bifurcated or divided dome A which is preferably formed from two
half castings ab secured together by means of bolts e so as to form a steam tight
joint, as clearly shown in Fig. 2. The lower ends of the halves of the circulator A
are formed with a flange to permit of the circulator being readily secured to a
flanged ring d. The flanged ring is secured at the top of the cross tube of the
steam generator by means of pinching screws or the like , and is arranged to
receive the circulator A. This circulator A; when in working position, is so
disposed as that the longitudinal stay or bar found in many types of internally
fired boilers occupies the space between the two halves of the doine, as indicated
in dotted lines in Fig. 1.
The interior of the circulator A is divided into two domes or chambers e, f,
by means of the downwardly projecting web of metal a, b, the chamber e being
the steam dome or reservoir, and the dome or chamber f the one through which
the water from the lower regions of the boiler is caused to circulate. Water
flowing upwards in the dome f finds its exit through the outlet fl a constant
circulation being kept up owing to convection and to the action of the circulator.
The dividing web a, b, may be extended to any convenient depth as is
indicated in Fig. 1 of the drawings.
In order to conduct the high-pressure-steam from the upper portion of steam
dome e, I employ a pipe i which might be secured to the downwardly projecting
web, as shown in Figs. 1 and 2, such steam pipe acting in a manner similar
to that described with reference to my said former patent. If thought desirable,
the chamber f, through which the circulating water flows, may be contracted
at a suitable point-say where the steam pipe discharges as indicated at f
Fig. 1.
Fig. 2 shows the application of my improved divided dome to a flanged ring
or base carried by a vertical cross tube. In cases where the dome would be used
in conjunction with a cross tube disposed at an angle, the modified form of ring
or based, indicated on a smaller scale in Fig. 3, would be used.
In some cases the steam dome or reservoir half e of the appliance A, may be
of a relatively greater height than the chamber f through which the water
circulates.
By dividing the dome as herein indicated I am enabled to fix circulators in
boilers or positions not heretofore possible so that the scope of usefulness of the
circulator is materially increased.
A further advantage due to the divided form of dome lies in the fact that the
water forced from the circulator is no longer discharged over the steam dome or
space from which the pipe is fed. A water circulator of this type is also
operative during greater variations of water level.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:
A water circulator for steam generators having a bifurcated or divided dome A,
constructed in the manner, for the purposes, and substantially as herein described
and shown
|Dated this 14th day of March 1900.
For the Applicant,.
E. K. DUTTON & Co.,
Chartered Patent Agents, 5, John Dalton Street, Manchester.