US1399035A - Sectional boiler - Google Patents

Description

H. G. THAYER AND S. T. McLELLAN.

SECIIONAL BOILER. APPLICATION FILED JULY 17. 1920.

1,399,035. Patented Dec. 6, 1921.

2 SHEETS-SHEET I.

H. G'. THAYER AND S. T McLELLAN.

SECTIONAL BOILER. APPLICATION. FILED JULY 17, 1920.

Patented Dec. 6, 1921.,

2 SHEETSSHEET 2.

HARRY Gr. THAYER AND SAMUEL T.

MCLELLAN, OF CHARLESTON, WEST VIRGINIA,

ASSIG-NORS 0F ONE-THIRD T0 LEWIS D. TRUSLO'W, OF CHARLESTON, WEST VIE- GINIA.

SECTIONAL BOILER.

To all whom it may concern:

Be it known that we, HARRY G. TI-IAYER and SAMUEL T. MOLELLAN, citizens of the United States, residing at Charleston, in the county of Kanawha, State of West Virginia, have invented certain new and useful Improvements in Sectional Boilers; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to steam boilers and it has for its object to meet the transportation conditions that are encountered in the shipment of boilers into the mountainous oil regions, where they are particularly intended for use. It has been found that some operations are located in regions that are inaccessible to wagons without the expensive cutting of roads, and the present boiler has been designed so that it may not only be shipped in sections, but those sections will each be of such shape and devoid of such exterior projections as will interfere with their rough transportation by skidding or rolling. It is found that at times a boiler must be hauled up at one side of the mountain and lowered at the. other and when each section is formed cylindrical and without interfering projections, it may be rolled up the mountain side and lowered down the mountain side by placing parallel cables on which the boiler is .laid, then passing the cables over the boiler and up the mountain side so that by drawing on the cables, the boiler will be rolled upwardly. By reversing the operation and slacking the cables, the boiler will be permitted to roll down. The present construction has been found to admirably answer the demands of these boiler con ditions.

The primary feature of the invention is the construction of a knockdown boiler in sections easily transported as suggested, and which may be finally assembled without the service of an expert-thereby minimizing thecost of labor as well as reducing the cost of transportation.

. Another feature of the invention is the possibility of making repairs and replacements without calling on an expert.

The invention possesses other minor features which will appear as the description Specification of Letters Patent.

Tatented Dec. 6, 1921.

1920. Serial No. 396,980.

progresses. Reference is made to the accompanying drawings wherein: 4

Figure 1 is a. longitudinal section through this boiler with its parts assembled.

Fig. 2 is a transverse section on the line 2-2 of Fig. 1 showing the inside of the front end casting .with some of the sector plates omitted.

Fig. 3 is a section on the line 33 of Fig. 1. V

Fig. 4 is an enlarged sectional detail on the line 4-4 of Fig. 1.

The fire tube section or barrel consists of a shell 1 having a front flue sheet 2 and a rear flue sheet 3 pierced. with holes through which pass the fire tubes 4 as usual, the shell continuing beyond the rear sheet 3 and receiving a head plate 5 complementing said sheet to make up the smoke box 6, the same having an, outlet 7 at its top; and the numeral 8 designates a suitable support for this end of the structure. This section as a whole is substantially cylindrical on its ex terior for ease in transportation as has been plate 13 at its front end, an annular plate 14 at its rear end, and a plate 15. The plate,

15 is flanged outwardly at its outer margin, as shown at 15, and is fitted withthis flange within the outwardly directed flange 14 that circumscribes the central opening of the end plate 14 and to which it is attached by rivets 17 At the opening of theannula plate 15, is an inwardly directed flange 16 over which is fitted and fastened the lining 12 by means of rivets 16. The axis of the lining 12 lies considerably below the shell 11, and therefore the casting at top and bottom must rise from the rear end of the lining to which it is attached for attachment to a flange 14. The outer edge of this plate 14 is also flanged and attached at 18 to the'shell 11. In connecting the fire box containing the shell 1, they are brought together with the portion of the flue sheet 2 that projects from the shell 1, wedged into the mclosure of the flange 15 and with the edge of the tube 1 against the outer edge of the flange 15, in which position, the two members are connected as hereinafter explained. A bridge bar 20 across the casting at its lower side supports the rear ends of grate bars 21. Their front ends are supported on 'a similar bridge bar 22 car ried by a circular plate or casting 23 which closes the opening in the crescent plate 13 and itself contains openings closed by doors 241- and 25. This circular plat-e is preferably made hollow, as by having sector plates 26 in two series with flanges 27 along their edges, the sectors being held to the casting by bolts 28 and the series surrounding the main door 2 1. The casting 23 has a peripheral flange 23 which incloses a flange 13 on the crescent plate 13 and the front end of the lining 12 which is bolted within said crescent flange as seen in Fig. 1; and the casting is held in place preferably by screws or bolts 29 through ears 29 projecting outward from its flange and engaging the end plate 13. The main door 24 when open permits the insertion of fuel; the door 25 is obviously for the removal of ashes.

The tube section is connected to the furnace section by nipples and couplings whose details are best shown in Fig. 4, there being at least two of these nipples leading from the steam space at the top of the furnace into the top of the shell 1, and one nipple leading from the water space at the bottom of the furnace into the bottom of the shell, although of course there could be a larger number with increased possibilities for circulation. At each point where a connection occurs, the annular plate 14 is pierced with an opening surrounded by a socket member 30, and at each side of the socket member is an outstanding fork producing a notch 31. Directly forward of this boss the shell 1 has an opening surrounded by a flange 32 from which rises a socket-forming elbow 33 whose upper end opening is in axial alinement with the member 30 and, like it, has at each side a fork producing a notch 34. The mouth of the socket member 30 is adapted to receive one end of a nipple or short section of pipe 35, appropriately packed to prevent leakage, and the other end of the nipple extends into the opening of the corresponding elbow, the opening being shaped to receive packing 36 and a gland 37 forward of the packing, the gland having at each side an outstanding fork producing a notch 38. In setting up this boiler the several nipples are inserted in their respective elbows and then the boiler shell is moved up so that the projecting portion of the flue sheet 2 is wedged against or into the flange 15 at the rear end of the furnace, and the shell which is in close plied when the boiler relation to the edge of the flange, projecting ends of the nipples being meanwhile passed into the respective socket members 30; this will aline the three notches 31, 38, and 34 into all of which a bolt 39 is now laid with its head 40 beyond the fork on the boss and its main nut 41 to the rear of the fork on the elbow, while a second nut 42 on its body stands forward of the fork on the gland. N ow when the main nuts ll are tightened up the boiler shell is very securely connected with the furnace shell, compressing the packing within the socket members 30, and then the nuts 42 can be adjusted to project the glands into the elbows and compress the packing 36. In order shall have no protuberances to render it difficult of transportation the flange 32 around each elbowis by preference attached to the shell 1 by means of bolts or screws 43, and the elbows will not be applied until the entire boiler is assembled. Also it is possible that the flange 44 around the smoke box out let 7 could be similarly secured to theshell by screws 1:5, for the same reason. The inner and outer shells of the furnace and its crescent and annular plates and casting may well be assembled at the factory, but the circular plate or casting 23' can easily be apis setup, which facilitates it being shaped as a separate element. The rear plate 5 which closes the smoke box may be attached either at the factoryor at the point of use.

In the top of the furnace shell is an opening surrounded by a flange 50 internally threaded for the reception of a section 51 of pipe preferably having a hood or deflector 52 supportedbyand above its upper end. Secured around this pipe is a collar 53, and secured around the collar is a drum 5?: constituting the body of a steam dome, the top 55 of the drum having a steam outlet 56. The numeral 57 designates a pipe or tube whose upper end opens through the pipe 51 just above the collar and whose lower end hangs into the'water space within the shell 11. The steam from the latter flows up thepipe 51, strikes its hood 52, passes out from under the same into the drum 5 1, and is drawn off at 56 for use; while the water of condensation runs out the pipe 57 and back into the water within the furnace shell. The entire steam dome is manufactured and shipped as a separate element and the threaded lower end of its pipe 51 screwed into the opening in the flange I V A. support 48 maybe placed below the shell of the boiler, the same being enough smaller than the support 8 to maintain the different elements at proper height above a level floor. Obviously it does not require a skilled mechanic to apply a stackto the outlet pipe 7 or a steam pipe to the outlet 56. Such details as the water glass, gage cocks, feed 50 at the time the boiler is set up.

that the boiler shell be supplied and applied,

tiebolts, etc. may but are not illustrated as they form no part of the present invention.

Thus is described my sectional boiler, made up of elements which are severally cylindrical to facilitate transportation as suggested above,-and which are constructed with special regardto the fact that the elements or sections are to be set up and connected at the point of use by unskilled labor and with primitive tools. The steam dome is braced by its top plate and its collar, the furnace shell is braced by its end plates and the casting and lining, and the boiler shell is braced by its crown sheets-therefore these units may be subject to rough handling in transportation without being bent out of shape. I would prefer that the elements 15 and 23 be cast, leaving most of the other elements to be made by cheaper processes. It is essential that the shells and ends of the furnace section be riveted together so tightly as to prevent leakage of water or steam, and the same is true with the boiler plates and crown sheets of the barrel and the fastening of the fire tubes through said sheets. This leaves to the purchaser the job of making watertight joints only where the flanges are applied and screwed on, where the ends of the several nipples abut their packing, and where the ipe or tube 51 of the dome is connected with the threads in the flange 50.

What is claimed is:

1. In a steam boiler, the combination with a cylindrical barrel; of a furnace comprising a cylindrical shell, an off-center cylindrical.

fire box therein, a crescent plate connecting water heater and injector,

the front ends of said shell and box, an an-.

nular plate secured to the rear end of the shell, and a plate connected at one end to the box and having its body deflected and its other end flanged and connected with said annular plate; means for connecting the barrel to the furnace with its end engaged with said flange, and a front plate closing the other end of the fire box and having doors.

2. In a steam boiler, the combination with a cylindrical barrel; of a furnace comprising a cylindrical shell, an off-center cylindrical fire box therein, a crescent plate con necting the front ends of said shell and box, an annular plate secured to the rear end of the shell, and a plate connected at one end to the box and having its body deflected and its other end flanged and connected with said annular plate; means for connecting the barrel to the furnace with its end engaged with said flange, a circular front plate closing the other end of the fire box and having fire and ash-doors, a lining for said front plate, and a grate within said box between the line of the doors.

3. In a steam boiler furnace, the combination with the shell, a crescent-shaped front plate having a flange around its inner edge, a cylindrical fire box eccentric to the shell with its front end secured within said flange, a plate provided with doors and having a peripheral flange engaging that on said plate, means for fastening the last-named plate to the shell of a plate having a flange at its front end secured to the rear end of the box, its body deflected, and a flange at its rear end concentric with the shell, an annular plate having an inner flange riveted to that last mentioned and an outer flange connected with the shell, and means for connecting a boiler barrel to the rear flange of the casting.

4. The combination with a furnace com prising a cylindrical shell, an annular rear plate, and a fire box whose rear end is connected with said plate, the latter having openings and registering socket members; of a barrel abutting the rear end of the fire box and having openings corresponding to those mentioned, an elbow communicating with each opening and connected to the barrel, nipples connecting the corresponding elbows and bosses, and means for drawing the barrel toward the furnace to hold the nipples in place and the barrel alined with the shell.

5. The combination with a furnace'com- -prising a cylindrical shell, an annular rear plate, and a fire box whose rear end is connected with said plate, the latter having openings and registering socket members; of a barrel abutting the rear end of the fire box and having openings corresponding to those mentioned, an elbow communicating with each opening directed axially toward the respective socket member, each elbow and socket member having external forks, a nipple whose ends enter said elbow and socket member, and bolts passing through said forks for connecting the parts.

In testimony whereof, we aflix our signatures, in the presence of two witnesses. HARRY Gr. THAYER. SAMUEL T. MOLELLAN. Witnesses:

L. D. TRUsLoW, CHAs. RAUoH.

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