US740032A - Tubulous steam-generator. - Google Patents

Description

No. 740,032. r PATBNTED SEPT. 29, 1903.

\ J. MOKEOHNIE.

TUBULOUS STEAM GENERATOR.

APPLICATION FILED DEC. 24. 1901.

N0 MODEL. 3 BHEETS-SHEET 1.

WITNESSES. //VV NTO H0 MOD J. MoKEOHNIEQ PATENTED SEPT. 29. 1903.

TUBULOUS STEAM GENERATOR.

APPLICATION FILEf) DBO. 24. 1901.

NESSES 3 SHEETSSHEET 2.

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ilo. 740,03.

UNITED STATES i iatented September 29,1903

PATENT OFFICE.

JAMES MOKECHNIE, OF BARROW-IN-FURNESS, ENGLAND, ASSIGN OR VICKERS SONS & MAXIM, LIMITED, OF SHEFFIELD AND LONDON,

ENGLAND.

SPECI CA ION forming part of Letters Patent N 0. 740,032, dated September 29, 1903. Application filed December 24,1901. Serial No. 87,101. (No modeli) To all whom it may concern.-

Be it knownthat I, JAMES MOKECHNIE, a

subject of His Majesty the King of Great Britaimresiding at Barrow-in-Furness, in the county of Lancaster, England, have invented a certain new and useful Improvement in Tubulous Steam-Generators, of which the fol lowing is a specification.

This invention relates to the class of tubulous steamgenerators 'having a number of vertical or inclined water tubes or headers divided by a partition and connected to a steam and water drum, to which headers are connected at approximately right angles'a number of steam-generating and water-circulating elements arranged over the furnace, each element consisting of an outer tube closed at one end and open at the other to one side of the header and of an inner tube open at one end to the outer tube and atthe other to the other side of the header, the object of my invention being to improve certain details in the arrangement and construction of the headers whereby tained.

In the accompanying drawings, Figure l is a sectional elevation of a part of a generator, showing my improvement. Fig. 2 is a side elevation, partly in section, of the improved construction and arrangement of a pair of headers. Fig. '3 is a front elevation of such a pair of headers. Fig. 4 isa plan showing the arrangement of the headers in pairs. Fig. 5 is a sectional plan, on a still larger scale, ofa header and an element carried thereby.

-The generator comprises the usual water and steam drum 1, headers 2, and elements-or double tubes 3 connected thereto, as seen in Fig. 1.

For the purpose of economizing space I form the headers as follows: Each consists of a tube, the original outside diameter of which is indicated by the dotted line 4 in Fig. 5, which is subsequently reduced to bring its exteriorform to an oval shape, as shown in such greater efficiency is ob- .figure and also in dotted line, Fig. 4. This gives a thin side and thickened end portions, in which are secured, respectively, the outer tube or steam-generating element 5 and the hand-hole caps 6, the construction of which does not'form part of the present invention; Each two headers 2, forming a pair, are secured in or provided with a flanged head 7,

"and for the purpose of holding same therein they are preferably again reduced in diame= ter to the form of a cylindrical tube, the wall tion of the headers with the drum 1 is re-- duced'and more can be placed in the same space than if each had a separate flange connection, two rows being easily obtained in place of one, as isusual in this type of generator.

The inner tubeor water-circulating element 9 is carried in the header by a partition 10, consisting of a straight plate or plates continuous from one end of the header to the other and held in'grooved lugs 11 11, having screw-threaded portions 12-, by which they can be screwed into the walls of the header-2 from the outside, theplate 10 passing freely into the grooves of' such'lugs, so that it can be dropped into position in the header and also beeasily withdrawn without afiecting the latter.

.The plate 10 is preferably carried up into the drum 1 and provided with a curved portion 10, which will serve to direct and assist the circulation of water and steam out of the rear compartment of the header and the elements 5, and another curved collecting-plate 14 may be carried inside such drum to direct and assist the circulation into the front compartment and the element 9, if desired.

The tubes9 are preferably provided with bell-mouthed attachments 13; but this and their manner of connection to the plate 10 do not form part of the present invention.

The construction of the outer tube 5 and the means of supporting the tube 9 therein form the subject of a separate divisional application hereof.

For the purpose of supporting the free ends of the elements 5 in such a manner that they may freely expand and contract I provide a supporting-framework consisting of a number of vertical or approximately vertical bars 15 in pairs, each pair being connected by a rivet inside a tubular ferrule 0r sleeve 17, forming a ladder shaped structure on the rungs of which each tube rests.

The group or nest of circulating and generating tubes or elements may be divided into a number of combustion-chambers by portable baffle-plates 21.

What I claim is- 1. In a tubulous steam-generator of the class described, the combination with a steam and water drum of headers arranged in pairs one of each pair being behind the axial line of the other and means for carrying such headers in pairs.

2. In a tubulous steam -generator of the class described the combination with a steam and water drum of a series of flanged heads and a pair of headers carried by each of such flanged heads one of each pair being behind the axial line of the other.

3. In a tubulous steam-generator of the class described, the combination with a steam and water drum of a pair of headers each of oval exterior section and circular interior section, arranged in pairs, one of each pair being behind the axial line of the other and a flanged head in which each pair of headers is carried.

4. In a tubulous steam -generator of the class described, and in combination, aheader, a series of grooved lugs projecting through the walls into the interior of name, means for introducing such lugs from the outside of the header and holding them in the walls and a continuous partition-plate held in the grooves of such lugs.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JAMES MC KECHNIE.

Witnesses:

R. S. D. BRADSHA\V, WM. GORDON.

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