Improvements in or relating to Tubes and the like Heat Transmitting Surfaces, such as are used in Heaters, Evaporators, Condensers, Boilers, and the like.
Year: 1899

page_text: Date of Application, 11th Sept., 1899
Complete Specification Left, 11th June, 1900-Accepted, 14th July, 1900
PROVISIONAL SPECIFICATION.
Improvements in or relating to Tubes and the like Heat Transmitting
Surfaces, such as are used in Heaters, Evaporators, Condensers,
Boilers, and the like.
We, HENRY BURNETT WATSON, JOHN STANLEY WATSON, and TORBEN CHRISTIAN
BILLETOP, all of High Bridge Works, in the City and County of Newcastle-on-
Tyne, Engineers, do hereby declare the nature of this invention to be as follows:-
Our present invention relates to heat transmitting surfaces such as tubes and
the like through which there is a transfer of heat between, say, a fluid passing
through the tubes and a fluid surrounding the tubes, the object of the invention
being to retard and break up the fluid passing through the individual tubes, by
means of a number of baffle plates so arranged as to ensure the continual impact
against them of the said fluid, and so constructed and carried that, whilst they do
not in any way interfere with the exterior surface of the tube, they can be
removed with facility for the purpose of cleaning etc.
We carry out our invention as follows:-In the case of a round tube, which we
take by way of example, we provide a number of D shaped baffle plates whose
curved edges are struck to a radius approximately equal to that of the interior
of the tube, and which plates when placed, at intervals, transversely across the
tube, alternate plates being reversely set, cause the fluid traversing the tube to
take a zig-zag or spiral devious course, during which it impinges against the
baffle plates in succession.
The plates may be arranged as separate plates joined together by a wire or bar
so that the whole set may be drawn out together: this may be effected in various
ways; for example, each plate may have a square hole, and a stem or distance piece
to separate it by the proper distance from the next plate, the whole series of
plates being so articulated together as to afford facilities for removal and cleaning.
It will be noticed that plain tubes only are needed and we attach considerable
importance to this feature.
In applying our invention to heaters, condensers, evaporators and the like,
provision is made, after the usual manner, to ensure the proper flow of fluid
through the tubes so that heat is transferred from the said fluid to the fluid
surrounding the tubes, or vice versa.
Our invention is also applicable to fire tube boilers and the like; and, of
course, the details of the arrangement may be modified without departing from
our invention.
1
Cantomban 1800
SLOAN & LLOYD BARNES,
Chartered Patent Agents, 34, Castle Street, Liverpool.

page_text: Improvements in or relating to Tubes and the like Heat Transmitting
Surfaces, such as are used in Heaters, Evaporators, Condensers,
Boilers, and the like.
We, HENRY BURNETT WATSON, JOHN STANLEY WATSON, and TORBEN CHRISTIAN
BILLETOP, all of High Bridge Works, in the City and County of Newcastle-on-
Tyne, Engineers, 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:―
Our present invention relates to heat transmitting surfaces such as tubes and
the like through which there is a transfer of heat between, say, a fluid passing
through the tubes and a fluid surrounding the tubes, the object of the invention
being to retard and break up the fluid passing through the individual tubes, by
means of a number of battle plates so arranged as to ensure the continual impact
against them of the said fluid, and so constructed and carried that, whilst they do
not in any way interfere with the exterior surface of the tube, they can be
removed with facility for the purpose of cleaning etc.
We have illustrated our invention in the accompanying drawings, in which
Figs. I and II represent an arrangement in which the battle plates are fitted in
the two vertical portions of an inverted U tube, Fig. I being an elevation in
medial section, and Fig. II a section of the tube on the line.A, A, of Fig. I;
Figs. III and IV represent an arrangement in which the baffle plates are fiited in
the annular space between two tubes, Fig. III being an elevation in medial
section, and Fig. IV a section of the tubes on the line B, B, of Fig. III;
Figs. and VI show an arrangement where the flow is through two tubes in
parallel, Fig. V being an elevation in medial section and Fig. VI a section of the
tubes on the line C, C, of Fig. V; and Figs. VII, VIII and IX are views, to
a larger scale, showing in detail a mode of carrying the baffle plates Fig. VII
and VIII being, respectively, longitudinal and transverse sections, and Fig. IX
an elevation of a single baffle plate.
The heat transmitting surfaces shown in the drawings would be suitable for an
evaporator, a condenser, a feed heater, or a radiator, but no details of construction
beyond those relating directly to the heat transmitting surfaces have been shown.
Referring to Figs. I and II the heat transmitting surface consists of an
inverted shaped tube, whose opposite ends pass through a tube plate to which
they are attached by expanding, or by any other convenient means. One of the
two fluids between which there is to be a transfer of heat is contained in the
casing 2, and the other fluid passes from the inlet into the space 3, thence through
the interior of the tube into the space 4 which leads to the outlet. A series of
baffle plates 5 attached to and carried by bars 6 are so shaped and arranged that
they tend to retard and break up the fluid as it passes through the tube, and
ensure a continual impact against them of the fluid. It will be seen that the
baffle plates and the bar to which they are attached can be readily removed for
the purposes of cleaning etc.
In Figs. III and IV a modification is shown in which the baffle plates are
carried on a central tube 7, up which one of the fluids passes from the space 3,
then down the annular space between the tubes 7 and 12 to the space 4 and thence
to the outlet the baffle plates 5 are in this case carried on the central tube 7.
The other fluid is, of course, contained in the casing 2.
In Figs. V and VI a further modification is shown in which the one fluid passes
in parallel through the tubes 1b, in each of which baffle plates are placed as before.

page_text: The baffle plates, and the bars which carry them, can be removed through the
covers 8.
The baffle plates 5 may be attached to the bars 6 in any convenient manner, such
as by rivetting a turned up strip of the plate to the bar, but we have shown in
Figs. VII, VIII and IX a convenient mode in which the baffle plates are
individually detachably secured to a central bar. In this construction each baffle
plate is provided with a boss or distance piece 9 through which passes a square
bar 6ª, and each baffle plate with its attached distance pieces is threaded on the
bar as shown.
Although we have illustrated the baffle plates as applied to tubes of circular
cross-section, we do not limit ourselves to such application; moreover our inven-
tion may, with slight modification, be applied to boiler tubes and the baffle
plates used to facilitate the transfer of heat either by deflecting the heated gases,
or by deflecting and agitating the water to be heated.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. In heat transmitting surfaces the construction and arrangement of baffle
plates substantially as described and illustrated in reference to Figs. I, II, V
and VI.
2. In heat transmitting surfaces the construction and arrangement of baffle
plates substantially as described and illustrated in reference to Figs. III and IV.
3. In heat transmitting surfaces the construction and arrangement of baffle
plates substantially as described and illustrated in reference to Figs. VII, VIII
and IX.
Τ
1 10+h dov of June 1900
SLOAN & LLOYD BARNES,
Chartered Patent Agents, 34, Castle Street, Liverpool.