US1741121A

US1741121A - Manufacture of boilers

Info

Publication number: US1741121A
Application number: US705484A
Authority: US
Inventors: William H Winslow
Original assignee: GEORGE W DULANY JR
Current assignee: GEORGE W DULANY JR
Priority date: 1924-04-10
Filing date: 1924-04-10
Publication date: 1929-12-24
Anticipated expiration: 1946-12-24

Description

Dec. 24, 1929 w, wmg gw 11,741,121

MANUFACTURE OF BOILERS Filed Apri 10, 1924 Patented Dec. 24, 1929 UNITE STATES PATENT @FFlfiE WILLIAM H. wmsLow, or cnrcnco, rumors, nssmn'on 'ro GEORGE w. DULANY,

an, or cnrcaao, Innmops MANUFACTURE OF BOILERS Application filed April 10,

This invention relates to steam boilers, particularly those of the water tube type, and especially to a method of forming elemental parts and building up and assembling component sections of such boilers- The main objects of the invention are to provide an improved methodof making a high-pressure water tube boiler adapted for convenient and inexpensive manufacture and capable of greater efficiency in operation; to

provide a method of manufacturing an improved and simplified form of headers and header parts; to provide methods and means for assembling and welding together the several tubes and header sections in a strong and de endable manner; and to provide for fabricating such boilers of a minimum number of diiierent kinds of parts.

An illustrative embodiment of this invention is shown by the accompanying drawings,

in which;

Figure 1 is a longitudinal vertical section through the steam generator outfit, including the fire-box and boilerl. 1 d 1 f Fi re 2 is a eaty enarge pan 0 a singli section of the boiler on the line 2-2 of Figure 3.

Figure 3 is a fragmentary vertical middle section from front to rear of one of the tube so and header units of the boiler.

Figure 4 is a plan of one of the header secticns of which the back header is composed.

Figure 5 is a section on line 55 of Figure 4.

Figure 6 is a plan of one of the sections of which the front header is composed.

Figure 7 is a section on line 77 of Figure*6.

Figure 8 is a fragmentary rear end elevation of the boiler.

In the construction shown in the drawings the boilerl, as a whole, is substantially integral molecularly and is mounted 1n the housing 2 over the grate 3. The said boiler comprises structurally a plurality of vertlcally disposed bays or sections 4 disposed side by side and connected for supplying steam to a common steam drum 5 or the like,positioned on the rear end of the boiler. These sections 4. are also connected to a common mud drum 1924. Serial No. 705,484.

6 located beneath the front end of the boiler. Each boiler section 4 comprises mainly a pair of upright headers 7 and 8, front and rear, in combination with a bank of tubes 9. These tubes are arranged in two vertical rows extending side by side in parallel planes but mutually staggered. The front header comprises a vertical series of like tubular sections 10, permanently fastened together end to end, one for each tube, and the rear header is somewhat similarly constructed of sections 11 permanently joined and each connected to one of the tubes 9. p

Each front section 10 is in the form of a short plain vertical tube, formed with a branch tubular outlet 12 midway of its height but horizontally of? center, as shown in Figure 6, sufiiciently to accommodate the pipe staggering above referred to, adjacent sections being mutually inverted. These sections may be formed in any convenient or desired manner, as for instance by drop forging, The rear sections 11 are mainly similar in character and appearance but are somewhat larger, and each is provided, on its inner side, with a plain tubular outlet 13 corresponding with the outlets 12 on the front sections, and on its opposite or outer side with an interiorly threaded tubular outlet or nipple 14 in axial alinement with outlet 13.

The method of constructing a boiler section will now be described. A tube 9 and a corresponding pair of front and

rear head sections

10 and 11 are selected and electrically welded together, first at one end and then at the other end, car being taken to have each header section right side up and on the same side of the tube. This is repeated with the other tubes. Then a series of tubes with their header sections attached are assembled one over another,'one tube at a time, and the header sections welded together electrically until a sufiicient height is attained, each joint or pair of joints being welded successively as the next adjacent tube is applied, until the entire boiler section is finished. In as sembling these tubes they are stackedalternately first on one side and then on the other. The position of any tube for this purpose may e reversed by turning it up-side-down.

I to the common steam chamber. 5 at the top and to the common mud drum 6 at the bottom.

The several tubes and header sections are butt welded by means of an electricwelding machine adapted for the purpose, which machine, however, forms no part of this invention. In order to'facilitate assemblage and proper alinement of the tubes with the corresponding header sections, the

tubular outlet projections

12 and 13 are bevelled interiorly so as to receive the exteriorly bevelled ends of the tubes, as shown in Figure 3. When the end of the tube is placed against the header outlet portion in the welding machine these parts are forced tightly together, and the welding current quickly unites the tube and the header member in a molecularly integral manner;

After the tubes are welded to the header sections, the latter are welded together. This ture, the tubes are bent somewhat adjacent to their ends, as at 16 and 17 so as to give the desired inclination for the body of the tube, with the ends disposed substantially horizontally for proper glinement with the header-

section outlets

12 and 13. This idea is shown by Figures 1 and 3. The bending maybe accomplished by well known means, either before or after the header sections are welded to the several tubes.

In order to facilitate closure of the ends of the headers, or connection thereof to the steam drum or mud drum, end ieces or

caps

18 and 19 are provided for the ront and rear headers respectively. The front caps are each provided with a threaded outlet at 20 .for the reception of a plug 21. The rear caps are substantially similar in character, but

are somewhat larger. They are adapted for connection to the steam drum at the top, or for threaded connection to the mud drum ,6 at the bottom, as will be apparent from Figure 1. These

end caps

18 and 19 are also welded to the corresponding end sections of the headers.

As a result of this construction the boiler prpiper is molecularly integral throughout,

Subse- L I times prove troublesome 1n boilers as usually constructed.

It may be noted that the number of difierent shapes or structure units for such a boiler is very small, comprising tubes, front header sections, rear header sections, front header caps and rear header caps, all welded together. I

Preferably the lower tubes are somewhat larger than the upper tubes, but this feature relates merely to design.

Other details of the boiler may be constructed and, arranged in accordance with well known principles of boiler practice, and need not be further described herein.

Although but one specific embodiment of this invention is herein shown and described, it is to be understood that numerous details of the construction shown may be altered or omitted without departin from the spirit of the invention as define by the following claims.

I claim:

1. The method of making a boiler or boiler section comprising tubes and individual header sections at the ends of the tubes which includes attaching said individual header sections to the ends of a plurality of said tubes, bending the tubes to a desired form adapted to bring the corresponding header sections at each end into a predetermined relation to each other, and then assembling the tubes with their attached header sections in alinement at the ends respectively of the tube aggroupments, and welding said sections together successively to form headers.

2. The method of making a boiler or boiler section comprisin tubes and individual header sections at t e ends of the tubes which consists in welding the individual header sections to the ends of a plurality of said tubes, bending the tubes to a desired form adapted to bring the corresponding header. sections at each end into a predetermined relation with. each other, assembling the tubes with their header sections in alinement, and welding said sections together successively to form a pair of headers for said tubes.

Signedat Chicago this 8th day of April WILLIAM H. WINSLOW.