US857723A - Steam-generator. - Google Patents

Description

PATENTED JUNE 25,1907.

M. CONNOR.

STEAM GENERATOR. APPLICATIQN FILED SEPT. 1, 1906i 5 SHEETS-SHEET 1.

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No. 857,723. PAHTELNTED JUNE 25, 1907,

I M. CONNOR.

STEAM GENERATOR. APPLICATION FILED $EPT.1, 1906.

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PATENTBD JUNE 25, 1907.

' M. CONNOR;

STEAM GENERATOR.

APPLIQATION FILED SEPT. 1, 1906.

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UNITED STATES PATENT orrrcn. V

STEAM -GENERATOR.

Specification of Letters Patent.

Patented June 25, 1907-.

Application filed September 1, 1906. Serial No. 332,985.

1 0 Ml whom it may concern.-

Be it known that I, MILEs CONNOR, a citizen of the United States, residing at Pueblo, in the county of Pueblo and State of Colorado, have invented certain new and useful Improvements in Steam-Generators; and I 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.

My invention relates to new and useful improvements in steam generators and more particularly to that class adapted to be used in connection with upright boilers such as are employed in use upon fire engines and my object is to provide means for quickly generating steam therein.

A further object is to provide means for directing the water from that portion of the boiler immediately around the fire box through and above the fire box into the upper end of the boiler.

A still further object is to provide means for automatically directing the water through the tubes and the water acket thereby insuring a continuous and complete circulation.

Other objects and advantageswill be hereinafter referred to and more particularly pointed out in the claims.

In the accompanying drawings which are made a part of this application, Figure 1 is a side elevation of a boiler employing my improved circulation generating mechanism showing portions thereof in dotted lines. Fig. 2 is a central sectional view through the boiler showing the water tubes and a portion of my improved generatingmechanism disposed therein. Fig. 3 is a plan view of the boiler and parts secured thereto with a the hood of the boiler removed. Fig. t'is a bottom plan view of the boiler showing parts of my improved generator secured thereto. Fig. 5 is a detail sectional View on an enlarged scale of my improved circulating valve, and, Figs. 6 to 13, inclusive, are views showing modified forms of the generator proper.

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, 1 indicates the shell or outer casing of a boiler such as is commonly used in connection with fire engines within which is disposed and at a dis tance therefrom an inner shell 2, said shells being secured together at their upper and lower ends to form a water and steam jacket or space 3.

' Extending through the boiler near its lower end is an opening 4 through which fuel is inserted into the fire box 5, the upper end of the boiler being provided with a hood 6, to the upper end of which is secured the usual form of draft pipe 7.

It is well known in the art that vertically disposed tubes have the best circulating but poor generating qualities, while the horizontally disposed tubes are the best generators but have poor circulating qualities and to this end I employ a plurality of horizontally disposed water tubes 8 which extend in substantially helical form from a point above the fire box 5 to the upper end of the inner shell 2 where they are connected with the steam space 3 by disposing the upper free ends 9 of the tubes through the wall of the shell 2 and by so disposing the tubes 8, the generating qualities thereof will be increased.

To obtain the proper circulation through the horizontally disposed tubes 8 I provide a vertically disposed generator proper 10 which is preferably composed of a plurality of vertically disposed pipes 11 provided at their lower ends with a connecting head 12 and at their upper ends with a similar head 13. Water is introduced into the generator 10 through a pipe 14, said pipe communicating with any source of water supply and has one of its ends disposed through the boiler and into connection with the head 12 at the lower end of the pipes 11, the water passing through the pipes 11 into the head 13 from whence it is conveyed into a pipe 15 extending over the top of the boiler, the lower end of the pipe 15 having a nozzle 15 at its lower end which is directed into engagement with a circulating valve 16, said valve being provided with a longitudinal bore 17 which is restricted in size near its center, thereby compressing the flow of water therethrough to form a vacuum.

Secured to the opposite end of the circulating valve 16 is a leading pipe 18 which is directed through the walls of the boiler and into engagement with the plurality of tubes 8. The valve 16 is connected to the lower end of the water space 3 by means of a connecting pipe 19, said pipe being provided near its junction with the water jacket with a valve 20 while the upper end of the connecting pipe is directed into the circulating valve 16 around the nozzle 15 so that when steam or water is directed through the nozzle the valve 16 will act as an injector or jet pump to draw the water through the pipe 19.

As best shown in Figs. 3 and 4 of the drawing, the generator 10 is preferably placed within the boiler immediately over the combustion chamber, so that the pipes 11 will be in direct contact with the heat arising from the fire box thereby quickly heating the water in the generator and as the volume of water within the generator is so much less than in the tubes 8 or water space 3, steam will first be produced in the generator after which it is discharged through the ipe 15 and into the circulating valve, therey causing a vacuum in the connecting pipe 19 which will result in drawing the water from the jacket 3 at a point immediately around the fire box and directing the same through the pipe 18 into the tubes 8 from whence it is conveyed to the upper end of the boiler and directed into the steam space through the ends 9 thereby producing a forced circulation through the tubes and jacket. It will be clearly seen that by this construction the water can be very quickly heated as the water in the boiler immediately around the fire box will be heated quicker than the water in the upper end of the boiler as the heat is more intense at this point and by causing a forced circulation the water will be drawn from the water jacket at a point immediately around the fire box and directed into the steam space at the upper end of the boiler through the pipes 8, this operation taking the heated water from the lower end of the jacket and disposing it into the upper end thereof bringing the cooler water to the lower end of the water jacket and disposing it around the fire box.

The feed pipe 14 is provided with a check valve 23 near its intersection with the boiler so that at any time the supply of water may be entirely shut ofi from the generator 10 and the pipe 22 is also provided with a suitable valve 24 so that the water may be cut off from the connecting pipe 19 and likewise the valve in the connecting pipe 19 serves to cut off the water between the water jacket and circulating valve. The water in entering the boiler is first directed through the generator 10 through the pipes 15 and 18, the tubes 8, and into the space 3, the pressure of the water in the pipe 14 being sufiicient to force the water through the generator and tubes 8 and it may be readily ascertained when a sufficient amount of water has entered the boiler by means, of a gage glass 25, a similar gage glass 26 being secured to the generator 10 while the boiler is also provided with suitable test cocks 27. When it becomes necessary to replenish the boiler and generator with water, the valve 23 is opened and the water directed first into the generreaches the lower ends of the tubes 8 and is thoroughly heated when it reaches the water space in the boiler. By this construction it will be seen that the steam pressure in the boiler will not be decreased by the introduc tion of a new supply of water, and it will also be seen that the introduction of the new supply of water will cause the continuation of the circulation through the tubes and boiler. As soon as the boiler has been sufficiently filled, the valve 23 is again closed and as soon as the water in the generator has become sufficiently heated, the steam arising therefrom will again start the circulation through the boiler and tubes.

I/Vhile I have shown the generator 10 as' preferably constructed of pipes as shown in Figs. 1, 2 and 3, I desire it to be understood that the generator may be formed in various ways without materially reducing its heating qualities, the various forms being shown in Figs. 6 to 13, inclusive, the generator shown in Fig. 6 being constructed by disposing angle irons 28 vertically between the outer and inner shells 1 and 2, and riveting the same in position.

In Fig. 7 the inner wall 2 is provided with an off set 29 and the generator 10 seated in the offset. In Fig. 8, the generator is formed by directing a portion of the inner shell inwardly and disposing a strip over the inwardly directed portion of the shell 2. In Fig. 9 of the drawing the generator is composed of a single straight pipe having a head at the top and bottom thereof and a smaller pipe spirally disposed from the lower to the upper head. In Figs. 10 and 11 the generator is formed from a single strip of sheet metal, the same being bent upon itself and the edges secured together as by riveting, the body portion of the sheet being bulged out to form a receptacle for the water, while in Figs. 12 and 13 the generator is formed of pipes having a head at the top and bottom thereof, one edge of said heads being substantially V-shaped to receive an extra pipe, the object in providing an extra pipe being to cause a circulation between the two heads of the generator, this result being accomplished by disposing the extra pipe adj acent the wall of the inner shell and between the shell and the other tubes thereby shielding the extra tube from the intense heat, the result being that the water will become heated more rapidly in the outer pipes and will arise,

culation of the water through the water jacket and tubes 8 before the water in the generator 10 is sufiiciently heated to cause a forced circulation and to that end I provide a pump 21 which may be of the well known or any preferred construction and preferably manually operated, the pump being in communication with the water jacket 3 and connecting pipe 19 through the medium of a pipe 22, one end of which is directed through the outer shell 1 and the opposite end thereof disposed into connection with the connecting pipe 19 so that when the pump is operated the water will be forced through the connectingpipe 19 into the circulating valve 16 and thence through the pipeslS into the tubes 8, the pipe 22 being directed through the shell 1 in line with the pipe 19 thereby directing the water from bottom to top of the boiler shell through tubes 8.

While I have shown the tubes 8 as entering the extreme upper end of the boiler, I desire it to be understood that the ends 9 may be introduced through the side of the shell 2 to prevent the water from being carried over with the steam through the steam supply pipe or takeoff, and it will also be understood that the pipes 8 may be disposed within the boiler in any preferred manner without departing from the scope of my invention.

I/Vhat I claim is:

1. A boiler of the class described, a steam generator disposed therein comprising a series of horizontally disposed tubes, means to connect said generator with the upper portion of said boiler, in combination with a vertically disposed steam generator, a circulating valve, means to connect the circulating valve and the upper portion of said vertical generator, and additional means to connect the inlet and ejecting ends of the circulating valve with the lower portions of the boiler and horizontal generating tubes respectively.

2. In a steam generator of the class described, the combination with a boiler having a water and steam space therein, and a plurality of horizontally disposed tubes in said boiler connected with the upper end of the steam space; of a generator in saidboiler comprising an upper and a lower head and vertically disposed generating tubes connecting said heads, means to direct water into the lower head, a pipe extending downwardly from said upper head, a circulating valve connected to said pipe, a pipe connecting the circulating valve with the boiler, and additional -means connecting the circulating valve and

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