US1495065A - Economizer - Google Patents

Description

May 2%, 924 1 495 J. E. BELL.

v BGONOMIZER Original Filed Nov. 7 19 nm 1 I mi i 1 8 j g F 9 Mn 8 W 'wuemtoz Patented May 20, 1924.

UNITED STATES PATENT 'OFFIGE.

JOHN E. BELL, 0F BROOKLYN, NEW YORK, ASSIGNOR TO POWER SPECIALTY COMPANY,

OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

' noonolvuznn.

February 11, 1922.

To (/71 whom if may concern.

Be it known that I. JOHN E. BELL, a citizen of the United States of America. residing at Brooklyn, in the county of Kings and State of New York. have invented certain new and useful Improvements iii-Economizers, of which the following is a full, clear. and exact description.

The invention upon which is based my present application for Letters Patent is an improvement applicable primarily to economize'rs for steam boilers but generally to other devices of the same type, and consists 'in the improved construction and arrangement of the tubes and fittings and their mode of support which is hereinafter more fully set forth.

This application is a division of my application Serial No. 336.284. filed on November 7, 1919.

In eeonomizers and other like apparatus generally. it is highly important: to so construct and install the tubes that they may readily be removed. individually. from their supports in case of necessity. This necessity may frequently arise when by corrosion, injury or other causes. a tube or tube section becomes impaired, and when by its removal and replacement by a new tube or tube section the integrity of the device. as a whole, may be preserved without the necessity of its bodily removal and the substitution of another complete bank of tubes.

I have devised to meet this requirement a novel form of apparatus. exemplified herein in an economizer in which the tubes are supported in side walls of cast-iron and are so constructed that they can be removed. singly or in pairs or sections therefrom. for which purpose the following plan is adopted.

. The tubes are of wrought steel. and are encased or enclosed in envelopes of cast-iron. formed, preferably. of corrugated rings shrunk onor tightly fitting the wrought steel inner tubes. These envelopes cover the body orall but the ends of the tubes over the bare ends of which are passed castiron disks or rings abutting closely the corrugated envelopes. and fitting in openings in the castiron side walls. These disks are preferably so formed that the ends of the inner tubes therein may be expanded or flared by means of suitable tools to receive the 1919', Serial No. 336,284. Divided and this application filed Serial No. 535,729.

a perfect union of the return bends and tubes,-and when it is desired to remove any tube or section of tubes, these clamps are ren'ioved. the returned bends knocked out, and the tube with its supporting disk simply withdrawn through the openings drilled or otherwise formed inthe side walls,- the area of such openings being sufficient to permit the disks and enveloped tubes to pass through them.

This improvement is illustrated in the accompanying drawing in which Fig. 1 is a sectional view of a portion of a bank of tubesconstructed and supported in accordance with my invention.

Fig. 2 is an end view of a portion of an apparatus embodying my invention.

Fig. 1 shows the general arrangement of a bank of tubes adapted for use in such a device as an economizer. These tubes are preferably of wrought steel and are encased in envelopes of corrugated cast-iron 2. which envelopes extend to near the ends of the tubes which are left bare. The side walls of the compartment or chamber containing these tubes and through which the hot gases pass are formed of cast-iron sheets. plates. or sections 3. through which are drilled or otherwise formed openings. Over the bare ends of the tubes are passed cast-iron disks or rings 4. abutting closely the corrugated cast1ron envelopes 2.

In Fig. l the tubes are staggered, that is to say. alternate tubes are connectedin series and the intermediate tubes. which he n a different vertical plane are similarly -'con-' The ends of -the' inner tubes are first exnected. but thisisv a matter of design, not A panded or flared to'fit the. openings in the disks 4: andV-shaped couplings or return bends 8 with tapered ends are driven into the ends of the tubes to be connected and";

then secured in position by. the clamps 7 and screws 9.

If any tube or tube section becomes injured or impaired to an extent that renders its removal necessary, the clamps and return bend uniting that tube to another are removed, whereupon the tube or tubes so released may be simply withdrawn through the openings in the side walls, and replaced by a new tube or tubes which are then joined and clamped as originally.

The rings 4 permit the ready withdrawal of the tubes through the plates 3 and are essential where the tubes intermediate the plate-like side walls have a greater effective outer diameter than the extended ends of the tubes themselves.

In practice this improvement has many advantages the most important of which will be readily recognized from the above description.

\Vhat I claim is l. An apparatus of the kind herein described, comprising in combination a bank of tubes having a greater effective diameter intern'iediate their ends than at the ends thereof, cast-iron disks surrounding the tubes neartheir ends, side walls with openings therein in which said disks lit, and means connecting the ends of tubes outside said walls, which are capable of being removed or detached to permit the tubes to be withdrawn through the openings in said walls,

2. An apparatus of the kind herein described, comprising in combination a bank of wrought steel tubes, corrugated envelopes of cast-iron in which said tubes are encased, cast-iron disks surrounding the tubes near their bare'ends, side walls with openings therein in which said disks fit, and means connecting the ends of tubes outside said walls which are capable of being removed or detached to permit the encased tubes and disks to be withdrawn through the openings in said walls.

3. An apparatus of the kind herein dcscribcd, comprising in combination a bank or wrought steel tubes having a greater effective diameter intermediate their ends than at the ends thereof, cast-iron disks over the ends of said tubes, cast-iron side walls with openings therein in which said disks fit, return bends connecting the open ends of tubes outside said side walls. and clamps for securing the return bends in position, said clamps being detachable to permit the tubes and disks to be withdrawn through the openings in the side walls.

4. An apparatus of the kind herein described, comprising in combination a bank of wrought steel tubes, corrugated cast-iron envelopes surrounding the body of said tubes, cast-iron disks over the bare ends of said tubes, cast-iron side walls with openings therein in which saiddisks fit, return bends connecting the open ends of tubes outside said side walls and clamps for securing the return bends in position, said clamps being detachable to permit the enveloped tubes and disks to be withdrawn through the open ings in the side walls.

5. An, apparatus of the kind described, comprising in combination a bank of tubes, corrugated envelopes of cast-iron in which said tubes are encased, cast-iron disks surrounding the tubes near theirbare ends, side walls with openings therein in which said disks tit, and header devices directly connecting the ends of the tubes outside said walls, said header devices being capable of being removed or detached from the main body portion of the tube to permit encased tubes and disks to be withdrawn through the openings in the side walls.

(3. An apparatus of the kind described, comprising in combination, a bank of tubes, corrugated envelopes of cast iron in which said tubes are encased, side-walls through which the bare ends of the tubes project, disks on said tubes on an end. adjacenta sidewall; said disks fitting apertures in said will and means connecting the ends of the .tubes outside of said walls. which are capable. of being removed or detachad to permit the encased tubes to be avithdrawn through the openings in the wall.

In testimony whereof I hereto ailix my signature.

JOHN E. BELL.

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