US1535332A - Furnace adapted for burning oil and other projectable fuels - Google Patents

Description

April 28, 1925. 1,535,332

. N. H. MORRIS FURNACE ADAPTED FOR BURNING OIL AND OTHER ERQJEGTABLE FUELS Filed April 21, 1 4 3 Sheets Sheec, 1

' April 28, 1925. 1,535,332

N. H. MORRIS FURNACE ADAPTED FOR BURNING OIL AND OTHER PROJECTABLE FUELS Filed A ril 21, 1924 3 SheetsShe'ec 2 April 28, 1925. 1,535,332

N. H. MORRIS FURNACE ADAP'I'ED FOR BURNING OIL AND OTHER PROJECTABLE FUELS Filed April 21, 1924 3 ShGGtS -SI'IGGTI 5 Patented Apr. 28, 1925.

UNITED srerres- NORMAN HUSON MORRIS, OF LONDON, ENGLAND.

FURNACE ADAPTED FO R BURNING OIL AND OTHERIROJECTABLE FUELS.

Application filed April 21, 1924. Serial No. 707,944.

To all whom it may concern:

Be it known that I, NORMAN HUSON MORRIS, a subject of the King of Great Britain, residing at London, England, have invented certain new and useful Improvements in and Connected with Furnaces Adapted for Burning Oil and Other Projectable Fuels, of which the following is a specification.

This invention comprises improvementsin and connected with furnaces, particularly steam boiler furnaces, adapted for burning oil and other projectable fuels.

An important object of the invention is to provide a simple and fool-proof control for the different units so as to secure efiicient working and long running periods uninterrupted by intervals for repairs. This is accomplished by providing a mechanism in which the operation of a single control handle effects simultaneously (a) a gradual turning on of the fuel to the burners, (b) a control of steam admission in accordance with the fuel admission this steam being utilized for projecting the fuel and (0) a control of the admission of air for supporting combustion in accordance with the fuel admission, this control making it impossible to admit cold air to the fire box when the flame is shut off, thereby avoiding damage to the fire box and tubes.

A further object is to combine, with the unified control means for simultaneously regulating a steam blast whereby operation ofsuch blast may be had when the conditions demand it and the blast may be shut off when the conditions no longer require it.

This provision is of particular importancewhen applying the invention to a locomotive steam boiler furnace, as such auxiliary blast is required when the locomotive is standing or drifting with the fire low and with no emission of exhaust to create a draught.

Yet another object is' to adapt the unified control mechanism for use in furnaces comprising a plurality of burners, the said con trol being operative to regulate the admission of steam and fuel to the several burners in a graduated manner whilst at the same time controlling the air admission and, if, desired, the admission of steam to the blast apparatus.

Finally, an object of this invention is to combine with a unified control for a plurality of burners, a selective means whereby graduated control of such burners either simultaneously or in sequence may be obtained at will by a simple manipulation rcquiring no particular exercise of thought or skill on the part of the operator.

These and other objects are fully set forth and ascertained in the following description and claims, the said description having reference to drawings which illustrate examples of mechanisms embodying these improvements.

In the drawings Figure 1 is a more or less diagrammatic perspective view of a triple burner installation for a locomotive fire box, the said installation comprising control mechanism in accordance with these improvements.

Figure 2 is a sectional elevation to a larger scale of the steam valve seen in Figure 1.

Figure 3 is a plan section of the valve seen in Figure 2.

Figure'i is a developed plan view of the; ports of the valve seen in F1gures 2 and 3.

Figure 5 is a transverse section on the line VV of Figure 3.

Figure 6 is a transverse section on the line VIVI of Figure 3.

Figure 7 is a view similar to Figure 2 of a modified construction of cylindrical steam valve adapted for giving selective control.

Figure 8 is a more or less diagrammatic elevation of a steam valve of the disc type adapted for giving selective control, a portionof the cover of the valve being broken away in order to display the ports.

Figure 9 is a perspective view of the valve seen in Figure 8.

Referring to Figure 1 of the drawings, a is the fire box of a locomotive boiler 6 and c c 0 are liquid fuel burners which are supplied with fuel by the pipes d d d and with steam for projecting the fuel by pipes e 6 e The admission of fuel to the pipes d d d is controlled by a valve in a casing f connected, as hereinafter explained, with a fuel supply. The admission of steam to the pipes e e e is controlled by a valve in a casing a connected by a pipe 72. with the boiler. The air for supporting combustion is controlled by suitable valves or louvres 7' under operative control of a rod 70 connected with a bell crank l, the latter being connected by a rod m with a crank it on the spindle of a skew gear 0 in mesh with a pinion p on a control shaft As will be seen, the shaft g extends from the cab of the locomotive, where it is fitted with a control handle 1', to the back of the fire box where the fuel valve casing f is situated, the said shaft 9 being fitted with a pinion a meshing with a pinion s on the fuel valve spindle and a pinion t for meshing with a pinion t on the steam valve spindle. u is a pipe extending from the steam valve casing g to a blower in the smoke box of the locomotive.

Re-fcrring now to Figure 2, the steam valve '1; is svlindrical, being formed or fixed on a spindle *1)" on which the pinion t 15 fixed. This spindle o is provided with a worm o screwing in a nut part w fixed in the end of the casing g, and is made steam tight by stuiiing box means indicated generally by the reference 00. The cylindrical valve 1) is hollow as indicated by dotted lines, and is formed with a reduced end portion g having a solid end wall 2 adapted for closing the port of the steam supply h. In the reduced portion 3/ there is formed a ring of ports 1 communicating with the hollow interior of the valve o, and in the cylindrical wall of the valve 12 are formed three tapering ports 2, 3, 4, these ports being seen also in Figure 4. The narrow leading ends of the tapering ports 2, 3, and 4, are not horizontally or axially aligned but a line touching the leading or narrow ends of the ports is at right angle to the axis of the cylindrical valve 1), putting the end of the port 2 in advance of the leading end of the port 3 and the latter, in turn, in advance of the leading end of the port 4;. The cylindrical wall of the valve '0 is also formed with a port 5 seen in Figure'2. The ports of the pipes e e e are in horizontal or axial alignment in the casing g and spaced and disposed so that the tapering ports 2, 3 and 4 will come into register therewith in sequence upon the turning of the valve '0. The port 5 of the blower pipe w is disposed so that the port 5 will move across it during the initial portion of the turning of the valve '0.

If the valve 1) be in its extreme left hand position, the solid end wall is hard against the port'of the steam admission pipe h and prevents admission of steam. Upon appropriately turning the valve 1) by means of the handle 1 and gearing 25 t, the worm '0 working in the nut to withdraws the wall a from the steam admission port, and the turning of the valve '0 brings the narrow end of the port. 2 into register with the port of the pipe 6 as shown in dotted lines in Figure 2. Steam now enters the annular space around the reduced end y, passes through the ports 1 into the interior of the valve '2) and is ad mitted by the port 2 to the port 0. In this position of the valve '0 the port 5 is in register with the long narrow port 5 of the blast nozzle supply pipe u, so that steam as may be required merely for keeping up steam when a locomotive is standing at a station, or is drifting. At this time, the blast nozzle or blower is receiving steam through the ports 5 5 and air for supporting combustion is admitted in limited quantity by the louvres j which have been turned to a slightly open position by the mechanism is Z m n 0 p. If the control handle r be turned further in the same direction, the end wall .2 will be moved farther from the steam admission port, a wider portion of the port 2 will register with the port of pipe 6 and the port 3 will come gradually into register with the port of the pipe 6'. The burner 0 will now deliver a larger flame and the burner 0 will also deliver a flame of gradually increasing size. During further turning of the valve 4), the port 4 will gradually come into register with the port of the pipe 6 as will be apparent, so that all three burners will be brought into operation. After the initial portion of this progressive control of the burners, the port 5 moves past the port 5 of the blast nozzle supply pipe at, and during the progressive control of the steam and fuel admission to the burners the air admission devices 7' are controlled in a corresponding manner.

The foregoing is a description of a graduated control of the burners in sequence, but it may be desired to exercise a graduate-d control of the burners in simultaneous operation. For this purpose, and as illustrated by Figures 3 to 6 an auxiliary control valve casing 6 may be provided on the valve casing g. The steam supply pipes e e e are connected with the auxiliary casing 6 in which is a revoluble plug valve? capable of being turned to either one of two positions by means of a handle 8, see Figure 1, 'on its spindle. Between the casings g and 6 are three port openings 9, 10 and 11 in horizontal or axial alignment and two other ports 12 and 13 so disposed that a line drawn through the centres of the ports 9, 12, and 13 is parallel with a line connecting the leading ends of the ports 2, 3 and 4. The port 13 communicates with the auxiliary valve casing 6 by means of an inclined passage 13 and the port 12 communicates with such casing by a bent passage 12*. The plug 7 is formed with an annular groove 14 opposite the ports a and 9, with a through port 15 which can be brought into register with ports a and 10, or ports a and 12, and with a through poit 16 which can be brought into register with ports 6 and 11 or ports a and 13. For the above described graduated control in sequence, the plug 7 w'ould be turned to the position in which the through ports 15 and 16 connect the ports e' and respectively with the ports and 11. For simultaneous graduated control, the plug 7 is turned to the position seen in Figures 5 and 6 in which the ports and 16 connect the ports 0 e respectively with the ports 12 and 13. In this position of the plug 7, the simultaneous registering of the ports 2, 3 and 4 with the ports 9, 12 and 13 during the turning of the. valve 41 will result in the simultaneous admission of steam to the pipes e e and e. The fuel valve casing f is similarly fitted with an auxiliary valve casing containing a S1II11- larlv formed valve. and the spindle 8 of the valve 7 is extended at 8 parallel with the shaft 9 and forms the spindle of a similar plug valve in the fuel valve casing. Consequently, by turning the handle 8 to one position or the other, both the steam and fuel valves will be controlled for either sequential or simultaneous graduated regulation of the burners as will be readily understood.

According to a modification illustrated in Figure 7, the valve 4) may be formed with two sets of ports, one set like that in Figure 2, comprising ports 2, 3 and 4 having their narrow ends on a line oblique to the axis of the valve, and the other set comprising ports 20, and having their narrow ends on a line parallel with the axis. In turning the valve o in one direction, the narrow ends of the ports 2, 3 and 4 will be the leadingends and will come into register with the ports a e e in sequence as before. In turning the valve '0 in the opposite direction, the narrow ends of the ports 20, 30, and 40 will be their leading ends and will come into register with the ports 6 e 6 simultaneously. Instead of the worm 'v and nut w used in Figure 2 for endwise movement of the valve 4), a fixed pin 17 engaging in a cam slot 18 in a part 19 on the valve spindle is employed. In turning the valve 4; in either direction from the shut-oft position seen in Figure 7, the pin 17 and cam slot 18- will cause an endwise movement of the valve v away from the porth. The steam ports for the blower must be duplicated as at 21, 21 and joined by a breeches connection, not shown, with the pipe it and the valve 0 must be formed with two ports 50, 50, one of which will register with one port 21 during clockwise turning and the other of which will register with the other port 21 during anti-clockwise turning, as will be readily understood. In order to operate the rod m and adjust the louvres j, for controlling the air admission in either direction of turning of the valve '0, it would be a simple matter to arrange for example, for the crank n to be on dead centre when the valve '0 is in the closed or neutral position, so that such crank would operate the rod m in either direction of turning. .i

Instead of a. cylindrical valve, a disc valve may be employed as illustrated in Figures 8 and 9. In this construction the front cover disc 26 has ports 22, 23, 24, adapted to be placed in communication with the pipes e e 6 and a port 25 adapted to be placed in connection with the steam blower suppl pipe to. The rear disc 27 is revolub e and has a central steam connection 28 for admitting steam to radial passages 29 and 31. Three tapering arcuate passages 32, 33, 34, extend from the passage 29 and other three arcuate passages 35, 36, 37, extend from the radial passage 31. The narrow ends of the passages 32, 33, 34, are at different distances from the ports 22, 23 and 24 respectively when thevalve is in the neutral position seen in Figure 8, whereas the narrow ends of the passages 35, 36, 37 are at one and the same distance from such ports. Consequently, clockwise turning of the disc 27 by its handle 38 will bring the passages 32, 33 and 34 into register with the ports 22, 23 and 24 in sequence as indicated by the indicating figures 1 2 3 seen on the front cover disc 26, whereas anti-clockwise turning will bring the passages 35, 36, 37 simultaneously into register with the ports 22, 23, 24, as may be indicated by the figure 1 on the disc 26. From the passages 29,31 there extend passages 39 for registering with the elongated port 25 of the pipe at in either direction of turning of the disc 27. A cam device comprisinga gradual slope 41 and a steep slope 42 may be fixed on the disc 27, the gradual slope 41 engaging with a rocking lever 43 during clockwise turning and the steep slope 42 engaging with a rocking lever 44 during anti-clockwise turning. The levers 43, 44, by suitableconnections 45, 46 with a bell crank 47, may be caused to operate the louvres or dampers j, Figure'l, in accordance with the contour of the cams as will be readily understood. A suitable connection would be provided, of course, between the valve seen in Figures 8 and 9 and a correspondingly constructed fuel valve, as will be readily understood.

The invention is not limited to the herein described constructions, as it is possible to devise many modifications and changes without departing from the spirit and es sentials of the invention as defined in the claims.

I claim v l.'In control mechanism for a furnace opening a supply by axial movement and for graduated admission from such supply to the burner by revolution, a common control mechanism for said valves and a1r control means operatively connected with said mechanism substantially as set forth.

2. In control mechanism for a furnace comprising a burner of a projectable fuel, the combination with a unified air, fuel and steam control of cylindrical fuel and steam valves comprising a screw device operative during the initial turning of such valves to effect an axial movement of the valves for uncovering a supply said valves during further turnlng being adapted for giving a graduated opening of ports between said supply and the burner, and air control means operatively connected with said unified control substantially as set forth.

3. In control mechanism for a furnace comprising a burner of a projectable fuel, the combination with a unified air fuel and steam control, of hollow cylindrical fuel and steam valves having one end adapted for operating as a valve face to seat against a fluid supply, ports admitting fluid to the interior of the hollow cylinders when said face leaves its seat, a peripheral port adapted for giving graduated admission from the valve casing to the burner and screw means connected with said valves for moving them endwise during revolution substantially as set forth.

4. In control mechanism for a furnace comprising a burner of a projectable fuel, the combination of a fuel valve adapted by a turning motion to produce opening of supply and then graduated admlsslon to the burner, a steam valve similarly adapted, a common control mechanism for said fuel and steam valves, air dampers, damper control mechanism in operative connection with said common control mechanism, a steam blast device and means in connection with said steam valve for supplying said blast device with steam during a predetermined phase of the control substantially as set forth.

5. In control mechanism for a furnace comprising a plurality of burners, the combination of co-ordinated fuel and steam valves, said valves being adapted for producing a graduated admission of fuel and steam to the several burners, a common control for said valves, an air admission damper device operatively connected with said common control, and a steam blast control valve associated with said steam valve, substantially as set forth.

6. In control mechanism for a furnace comprising a plurality of burners, the combination of co-ordinated fuel and steam valves adapted for two different phases of control one phase being that of graduated simultaneous admission of fuel and-steam to all of the burners and the other phase being that of graduated admission of fuel and steam to the different burners in sequence, a common control for said valves and an air admission damper device operatively connected with said common control, substantially as set forth.

7. In control mechanism for a furnace comprising a plurality of burners in which liquid fuel is atomized and projected by steam, the combination of a steam ,valve arrangement adapted? for giving graduated control of admission to the several burners simultaneously or in sequence as desired, a fuel valve, a common control for said valve, an air admission damper device operatively connected with said common control, and a blast control valve associated with said steam valve substantially as set forth.

8. In control mechanism for a furnace comprising a plurality of burners in which liquid fuel is atomized and projected by steam, the combination of a hollow cylindrical steam valve, a reduced end on said valve said reduced end being adapted for acting as a screw-down valve face and having ports for admission of steam to the interior of said valve after the lifting of said face from its seat, the cylindrical wall of said valve being formed with a plurality of tapering ports having their leading ends aligned at an angle to the longitudinal axis of the valve and adapted for registering with ports in the casing of said valve, a fuel valve, a common control for said valves and an air admission damper device operatively connected with said common control substan tially as set forth.

9. In a unified selective control for a liquid fuel furnace comprising a plurality of burners, the combination of a rotary steam valve, a rotary fuel valve, a common hand gear operatively connected with said valves, a plurality of pipe connections between the casings of said valves and said burners, said steam valve comprising port arrangements adapted in one phase of. working for giving a graduated simultaneous admission to said burners and in another phase of working for giving a graduated admission to said burners in sequence, a furnace air damper device operatively connected with said hand control, and a steam blast control valve associated with said steam valve, substantially, as set forth.

10. In a unified selective control for a liquid fuel furnace comprising a plurality of burners, thefcombination of a rotary steam 1 valve f' 'arrangement adjustable for graduated admission to the several burners either simultaneously or in sequence as desired, a rotary fuel valve adjustable for graduated admission to said burners in accordance with said steam. valve, a common hand gear operative upon said Valves, fire box dampers operatively connected with said hand gear, and a steam blast connection with said steam valve, said connection being supplied with steam through a ort arrangement which opens during the graduated admission to the burners Whether simultaneously or in sequence substantially as set fcrth.

NORMAN HUSON MORRIS.

Images