Improved Water Tube Boiler.
Year: 1898

page_text: Date of Application, 7th Apr., 1898-Accepted, 16th July, 1898
.
COMPLETE SPECIFICATION.
Improved Water Tube Boiler.
I, JEAN MAZIERES, of 169, Rue Judaique, Bordeaux, France, 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 follow-
ing statement;-
In the annexed drawing;
Fig. 1 is a vertical sectional view of the boiler.
Fig. 2 is a section taken on the axis of the steam drum and of the downward
circulation tubes. It shows also a front view of the steaming parts and the
horizontal distributing drum, the casing and details being removed.
Fig. 3 is a section showing the method of securing the steaming tubes and
the inner feed pipes, to the vertical receiver.
Fig. 4 shows the means employed to remove the inner feed pipe.
Fig. 5 shows the means employed to remove the inner steaming tube.
In Figures 1 and 2 the outer parts of the boiler, the parts of the safety feed,
priming and purging devices, of the grate and of the furnace, as in all boilers,
are as follows: the steam and water drum R placed in front of the face of the
boiler and parallel to it. It is supported by two brackets D¹ (Fig. 1) and is
outside the furnace and protected from contact with the gas produced by com-
bustion. It is also separated from the steaming elements C, with which it is
only in communication by the pipes R¹ and I. It is divided into three compart-
ments by the partitions A A¹. In the central part B discharge the tubes I of
the steaming elements. In the two end compartments C₁ C are the water-ports
of the downward circulation tubes R¹. This division of the steam and water
drum into compartments is intended first to avoid; by means of a diaphragm d
and partitions A A¹, all ebulition of water in the compartments C¹ C"; further-
more as the feeding occurs in the central compartment B, the deposits from the
feed-water are precipitated there and cannot pass, on account of the parti-
tions A A¹, into the compartments C₁ C" of the water-holes of the pipes R¹.
From these arrangements it follows that all deposits are left in the central com-
partment B whence they can be removed by inner cleaning or purging. The
compartiments C₁ C receive no deposits nor any downward circulation of water
and steam from the tubes I; thus no carrying of deposits into the steaming
tubes need be feared; the cleanliness also of the steaming-tubes is constantly
insured.
The diaphragm d pierced with small holes, is intended to prevent jets of water
from the water and steam-holes of the tubes I of the steaming-elements. It
serves at the same time to separate the water and the steam.
The pipes R' for downward circulation communicate with the distributing-
drum G. At the lower part of these pipes are arranged small deposit-collectors a
in which are received the deposits which may have passed over the partitions A. A¹.
V is a purging-cock or clearance-valve.
On the distributing-drum G are fixed by means of flanges and bolts the vertical
collectors C from the Field's tube steaming elements. These vertical collectors

page_text: are composed of two compartments E and F separated by a partition f, ef
steaming-tubes T and of feed-pipes t slightly inclined and of closings for
examination, for removing or mounting tubes. The number of steaming-
elements as well as the number of tubes composing their steaming-elements is
variable according to the quantity of steam to be produced. At their upper
part, the vertical collectors C are secured to the steam-drum R with flanges and
bolts by the pipes I. These pipes lead the mixture of water and steam from
the steaming elements to the steam-drum R. These tubes, according to the
uses made of the boiler, may discharge either at the water level, or above it or
below it.
The cycle of the circulation of the water is constituted as follows; the water
from the steaming drum R passes through pipes R¹, then enters the horizontal
distributing-drum G, is distributed by this distributing drum into the com-
partments E of the vertical collectors C, passes through the inner tubes t and
returns into the annular space between the tubes T, t; in this return circulation
it is subjected to the heat of the furnace and becomes steam in great part. In
this state it arrives in the compartment F and passes in a state of mixed steam
and water through the pipe I, to discharge into the steam drum R, where the
diaphragm separates the water from the steam.
It can be seen by the above description, that the water leaving the steam-
drum R, follows the direction indicated by the arrows and returns to the steam-
drum through the tubes I, with a speed increasing with the decrease of the
density of the mixture of water and steam which flows through said tubes I.
This speed is thus proportioned to the production of steam or to the intensity
of the heat.
The feed by the horizontal distributing-drum G of the steaming-elements,
secures the normal feed of the steam-tubes in proportion to their distance from
the grate. It follows from this arrangement that, however intense the heating
may be, the lower tubes are fed first and with a quantity corresponding to the
produced steam. The upper steam-tubes producing less steam are also fed in
proportion to their steam production.
In Fig. 3, E is the compartment receiving the water; F are the upward circula-
tion compartments, X the self-closings, T the steaming-tube, t the inner feed-
pipe. The following is the way in which the steaming-tube T is fixed; at its
end are two rings d, and b; the ring of cylindrical form is located in an orifice
in the partition f, the ring b of conical form is located in a conical hole of the
wall g; the inner pressure supported by the tube presses the ring 6 on the conical
part of the wall or partition g and forms thus a tight metal joint.
The inner tube t carries on its end a ring H, adjusted by means of a conical
surface e within the tube T in front of the ring d¹. The end n of tube t in
chucked or dudgeoned into the ring H, the other end carries centring blocks.
The tube T is open at Z above and below, to allow the mixed water and steam
to pass into the compartments F.
cn
In Fig. 4 is indicated the means used to remove the inner tube t. The self-
closing being removed, a two spring armed rod A" is introduced, carrying
the end two little heads a which are located in the holes p of the ring B¹ of the
inner tube. Then the crossbar of the self-closing is fixed and the nut thereof
screwed on; with the least effort the ring B¹ leaves the tube T and the said
tube is only to be removed by hand.
In Fig. 5 is shown the means employed to remove the steaming tube T. The
self-closing being removed, a rod A is introduced having two spring branches
and carrying on the end two little heads a, which are placed in the holes m of
the tube. Then, the crossbar of the self-closing is placed and the nut is screwed
until the tube leaves its conical adjustment; afterwards the tube can be removed
by hand.
These tubes are mounted as follows: the tube T is first placed in position, it
is pushed in until rings and 6 (Fig. 3), are adjusted in their places, then

page_text: strike lightly on ring d' until the tube is firm in its conical adjustment. The
inner feed-tube being then introduced, it suffices to strike lightly in order to
fix the ring H in the conical part of the end of tube T.
I reserve to myself the right of using all suitable materials for construction
of these boilers, to vary the forms and arrangements entirely or in part, according
to the uses which may be made of them in future.
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. A water tube boiler with Field's water tubes, comprising a steam and water
drum separated from the steaming elements and divided into compartments,
substantially as described and shown as an example.
2. In the arrangement of down circulation tubes and upward circulation
tubes for mixed water and steam; steaming elements forming a cycle of water-
circulation in which the speed of circulation of water is proportioned to the
steam production, substantially as described.
3. In the arrangement means of fixing, of removing and of mounting tubes
on the vertical collectors of the steaming elements, substantially as described.
4. The application of these boilers to marine engines, to all motors or other
machines for which steam is employed.
D L 1
EL
11000
L. DUVINAGE,
Agent for Applicant, 8, Rue des Princes, Brussels, Belgium.