Improvements relating to the Flue Tubes of Steam Generators, Feed Water Heaters, Economizers, and similar Apparatus.
Year: 1899

page_text: Date of Application, 18th July, 1899
Complete Specification Left, 7th Apr., 1900-Accepted, 12th May, 1900
Improvements relating to the Flue Tubes of Steam Generators, Feed
Water Heaters, Economizers, and similar Apparatus.
I, JOHN RUSSELL MACKAY, of 3, Glencairn Place, Mount Florida, Glasgow,
Scotland, and of 452, Henry Street, Brooklyn, New York, United States of
America, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to steam generators and to feed water heaters, economizers,
and such apparatus, where heated gases traverse flues or tubes for heating water,
or other purposes, and has for its object to provide a tube or tube lining whereby
a maximum amount of heat is intercepted from the gases before they are dis-
charged. According to the invention the baffle liner is provided from a single
sheet or plate of metal or from two or more sheets or plates of metal suitably
stamped or formed so as to lie across the tube and have the edges of the plate or
plates firmly pressed against the interior thereof.
In carrying the invention into effect in the provision of a baffle liner I provide
a metal plate which I bend to V or U form and provide the respective edges of
such plate with diverted flanges which upon the introduction of the plate within
the tube or flue make close and firm contact with its interior.
The plate may
be readily introduced by drawing the sides together by such means as a brace
bolt or bolts which would bring the sides of the baffle liner closely together,
thereby permitting the easy and unrestricted introduction or withdrawal of
the liner into or from the tube.
The central space in the tube formed by the liner may be closed at one end
and the lateral spaces may be closed at the other end, suitable apertures or
perforations being provided in the baffle liner so as to permit of the gases passing
from the inner to the outer spaces.
In carrying the invention into effect according to another modification I may
provide the baffle liner from two plates stamped to a substantially V or U section
and abutting one against the other with their sides extending outwardly. The
abutting surfaces or edges are preferably formed flat and inclined so that one
part of the liner may be introduced into the tube or flue and the other caused
to slide upon the edge or face of the other and be jammed into position, being
positively firmly retained by means of bolts. In this case also certain of the spaces
may be open at one end and closed at the other and the liner suitably perforated
for permitting of the passage of the gases from one space to the other.
In carrying the invention into effect in the application of a liner to a serve
tube two plates of curved section may be employed, one bolted or rivetted to
the other, and having their four extended edges formed with flanges which rest
against the interior of the tubes or flues to be lined. In this case also certain
of the spaces may be closed at one end and open at the other and the liner may
be suitably perforated for the purpose of permitting of the passage of gas from
one space to the other.

page_text: It will be understood that by the construction of a baffle liner according to
the invention the heat from the gases passing through the tube or flue into
which it is inserted is effectively intercepted, and it will be understood that
the liners by formation as herein before described are firmly held within the
tubes or flues.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester,
Agents
Improvements relating to the Flue Tubes of Steam Generators, Feed
Water Heaters, Economizers, and similar Apparatus.
I, JOHN RUSSELL MACKAY, of 3, Glencairn Place, Mount Florida, Glasgow,
Scotland, and of 452, Henry Street, Brooklyn, New York, United States of
America, Engineer, 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:-
My invention relates to steam generators and to feed water heaters, economisers,
and such apparatus, where heated gases traverse flues or tubes for heating water,
or other purposes and has for its object to provide a tube or tube lining whereby
a maximum amount of heat is intercepted from the gases before they are dis-
charged. According to the invention the baffle liner is provided from a single
sheet or plate of metal, or from two or more sheets or plates of metal, suitably
stamped or formed so as to lie across the tube and have the edges of the plate or
plates firmly pressed against the interior thereof.
In the accompanying sheet of explanatory drawings.
Figure 1 is a cross sectional elevation of a tube fitted with one form of my
improved tube liners, and
Figure 2 is a longitudinal section of the same.
6
Figures 3 and 4 are similar views of a modified form of tube liner.
Figure 5 illustrates a further modification of liner fitted to a
while,
serve" tube,
Figure 6 shows a tube and liner in which the liner itself is provided with beat
arms or ribs which serve the purpose of increasing the heating surface of the
tubes while dispensing with the ribs as used in the "serve" tube.
In carrying the invention into effect in the provision of a baffle liner as illus-
trated in Figures 1 and 2, I provide a metal plate which I bend to V or U form
and provide the respective edges of such plate with diverted flanges which
upon the introduction of the plate within the tube or flue e make close and firm
contact with its interior. The plate may be readily introduced by drawing
the sides together by such means as a brace bolt or bolts which would bring the
sides of the baffle liner closely together, thereby permitting the easy and unre-
stricted introduction or withdrawal of the liner a into or from the tube c.
The central space in the tube formed by the liner may be closed at one end d
and the lateral spaces e may be closed at the other end, suitable apertures or
perforations f being provided in the baffle liner so as to permit of the gases
passing from the inner to the outer spaces.
In carrying the invention into effect according to another modification as
illustrated in Figures 3 and 4 I may provide the baffle liner from two plates 9: I,

page_text: stamped to a substantially ✓ or U section and abutting one against the other
with their sides extending outwardly. The abutting surfaces or edges are prefer-
ably formed flat and inclined so that one part of the liner may be introduced
into the tube or flue and the other caused to slide upon the edge or face of the
other and be jammed into position, being positively firmly retained by means of
bolts h. In this case also certain of the spaces may be open at one end and
closed at the other and the liner suitably perforated for permitting of the passage
of the gases from one space to the .other.
In carrying the invention into effect in the application of a liner to a
"serve"
tube as illustrated in cross section at Figure 5 two plates i, i, of curved section
may be employed, one bolted or rivetted to the other by bolts h, h, and having
their four extended edges formed with flanges 6 which rest firmly against the
interior of the tubes or flues c to be lined. In this case also certain of the
spaces may be closed at one end and open at the other and the liner may be
suitably perforated for the purpose of permitting of the passage of gas from one
space to the other.
In the modified form of tube and liner illustrated in Figure 6 the liner is made
up of two plates j, j, which are bent up to form arms or ribs & of wedge shape,
the bottom of the wedge-shaped parts of the plates resting against the interior
of the tubes or flues cas illustrated. These ribs or arms thus serve the purpose
of the ribs or arms in use in the well-known serve "tube.
It will be understood that by the construction of a baffle liner according to
the invention the heat from the gases passing through the tube or flue into which
it is inserted is effectively intercepted, and it will be understood that the liners
by formation as herein before described are firmly held within the tubes or
flues.
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:-
1-In flues or tubes of steam generators, feed water heaters and the like, the
provision of tube linings constructed from a single metal plate or sheet bent to V
or U form and having diverted flanges which are firmly pressed against the
interior of the tube, the liners being perforated to permit of the gases passing
therethrough substantially as hereinbefore described.
2. The construction of tube linings for steam generators, feed water heaters
and the like, from two sheets or plates of metal which abut one against the
other the abutting sides being formed flat and inclined to permit of the intro-
duction of the liner into the tube or flue and being bolted together when in
position within the tube substantially as hereinbefore described.
3. The construction of tube liners for the tubes of steam generators and the
like from curved metal plates either bolted together and having their edges
diverted to firmly press against the interior of the tubes, or having wedge shaped
arms or ribs extending out from the periphery of the liner to the interior of
the tubes substantially as herein before described.
4. The construction of tube liners for the tubes or flues of steam generators,
feed water heaters and the like, substantially as hereinbefore described and
as illustrated in the accompanying drawings.
Datad this fih da..
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester,
Agents
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester,
Agents