US1569805A - Oil burner - Google Patents

Description

Patented Jan. 12, 1926.

h .osEPH A. HEBERT, or rmmroa'r, TEXAS.

OIL BURNER.

'Appucamn med may 2,

To all who/m,- it may concern:

Be it known that I, JOSEPH A. HEBERT,

' a citizen of the United States,.residing at Freeport, Texas, have invented a certain new and useful Im rovement in Oil Burners, of which the ollowing is a specification. f

My invention relates to oil burners such as are used to spray or atomize the oil in combination with the projection of steam and air into the fire box of the furnace.

It is an object of the invention to provide a convenient and accessible means for regulating the amount or proportion of the oil, steam and air, as desired.

. Another object is to provide an effective nozzle whereby the 'atojmizing of the materials may be efficiently accomplished.

Another object is to provide an oil burner mechanism, the operating parts of which may besituated at some distance from the furnace, and in which the oil may be readily heated on its passage to the spray nozzle. Other objects and advantages will more clearly appear in the specification, which follows.

Referring to the drawing herewith wherein like numerals of reference have been applied to like parts in all the \-views, Fig. 1 is a central longitudinal section through the main working parts of an oil burner embodying my invention. Figs. 2 and 3 are side elevations of the delivery valves employed in connection with my spray nozzle. Fig. 4 is an end elevation of the delivery'valve shown in Fig. 2, and Fig. 5 is an end elevation of the valve member shown in Fig. 3. y l o Inv delivering the oil, steam and air to the spray nozzle, I haveemployed a central body member 1 so constructed as to provide an entrance for the different fluids to the discharge pipes. This member is made up of a casting 1 having a lateral fitting 2 therein threaded internally at 3 for attachment to a steam pipe connected with -a boiler or other source of Asupply of steam.

There is a chamber 4 connected With the steam inlet, said chamber having connection with an annular discharge chamber 5 through which the steam has access to the pipe 6 leading to the nozzle.

The rear end of said casting is provided 'with a centrally threaded nipple 7 adapted to. receive a cap 8- forming part of a stuffing box in which the packing 9 com- 1924; Serial No. 710,532.

pressed by the gland 10 throughl the tightening -of the cap 8. The casting'is tubular so as to allow the passage through said stuffing box of an oil delivery pipe 11. Outsideof the 4central ni ple 7 previously referred to, is a circular ange 12 threaded to receive a cap 13 which is reduced materlally 1n diameter about midway of its ends, and the reduced portion is threaded at 14 to receive the vcap 15 which`\serves lto adf`just the stuffing box V16. The member 14 is. also threaded internally to receive a ktube 17 which acts as an adjusting member7 as will be later described.

On the side of the casting 1, opposite to y the steam inlet 3, is an oil inlet 18 having a threaded socket 19 for connection with an 011 pipe extending to some source of supply of fuel oil. The inlet is connected with a .chamber 20 surrounding the oil pi e 11 .Within the coupling member 13 as slhown 1n the drawing. The oil pipe 11 ,is perforated at 21 within the chamber 20 to allow the oil to pass from said chamber into the said oil pipe. -The said oil pipe 11 is y connected at its outer end to the reduced forward end 22 of the tubular member 17. Said oil pipe is thus rotatable with said adjusting member 17, as will be later described.

. The rearward end of the adjusting member 17 is threaded to receive a handle member 23, by means of which said member 17 may be rotated. To the rear of the handle member there is a stufling box 24 adjustable through means of the cap 25 to make a fluid tight connection between the member 17 and a pipe 26 fitting through said stuffing box, and rotatable therein by means of a handle 27 on the rear end thereof. The forward end of the tubular member 26 is provided with acentral passage 28 through which air may nd an entrance to the nozzle. To ac- ,`complish this, the forward end of the said 'air pipe 26is coupled at 29 to the air conducting pipe 30 which extends longitudinally through the casting 1, and in spaced relation inside of the oil pipe 11. The member 26 is adjustable longitudinally within the member 17 by being threaded at 3'1 within the said member 17.

The steam pipe 6 is connected at its rearward end within the casting 1 and has a central chamber 33 therein connected with the annular chamber 5 in said casting. The forward endV of the steam pipe 'is screwed within a socket 34 in the nozzle member 35. Said nozzle member is cylindrical in form and has a rearwardl tapered recess 36 on its forward nend lea ing to a short cylindrical opening 37 through which the fuel is projected. Within the nozzle is a cylindrical chamber 38, the forward end of which is tapered inwardly to connect with the passage 37 as shown in Fig. 1, the tapered portion 39 forming a seat for an oil valve 40.

Said oil valve 40 is screwed on the forward end of the oil pipe 11 and is cylindrical in shape except that the forward end is tapered at 41 to fit within the seat 39 previously mentioned. As shown in Fig. 2, the valve member is provided on its cylindrical periphery with spiral grooves 42. It may be understood that the cylindrical portion of the valve fits closely within the nozzle and the outer steam pipe 6, and the grooves 42 thus provide a series of passages `fromthe chamber 33 within the steam pipe forwardly toward the discharge opening 37; steam passing through will strike against the forward inclined wall of the seat 39 and be deflected outwardly through the opening 37 at an angle thereto, the spiral formation of the grooves giving to the steam a sort of whirling motion.

Within the oil pipe 11 and spaced therefrom, is the air pipe 30 previously described. Between the said air pipe and the oil pipe is thus provided a chamber 42 through which the oil may find passage.

On the forward end of the air pipe 30 is an air nozzle 43 shown best in Fig. 3. It is cylindrical at its outer surface at 44, the forward end being tapered downwardly at 45 to fit within a seat 46 formed within the nozzle 40 in which the nozzle 43 is slidable. A forwardly extending nozzle 48 on said valve 43 extends through the opening in the valve member 40 to a point about even with the discharge opening 37. The opening 48 through the nozzle 43 is s uared, as shown in Fig. 5, and the inner en of said passage is fitted with a ball valve 49, said valve being adapted to partially close Athe opening 48, but allowing a passage for air on each of the corners of said opening. Within the nozzle and to the rear of said ball valve, is a seat 50 into which the valve may it to close off the passage of fluids inwardly through the air inlet.

In the operation of my device' the steam will be allowed to enter through the inlet 3 V'and to pass through the chamber 33 and the grooves 42 in the nozzle, and thus be dischar ed through the outlet assage 37 to 3 the com ustion chamber of the urnace. The

valve 40 may be adjusted toward and away from the seat 39 in the nozzle so as to regulate the amount of steam being rojected therefrom in an obvious manner. his regulation 1s accomplished through the rotation of the handle 23 upon the adjusting member 17 s0 as to screw the same forwardly or rearwardly relative to the member 14.

The projecting of the steam through the nozzle will have a suction effect to draw the oil inwardly through the inlet 19, the charnber 20 and the openings 21 to the passage 30 through the said Voil pipe. From thence the oil will pass through the spiral grooves 51 in the outer surface of the valve member 43 from which it will be projected against the inner face of the nozzle 40, and will pass outwardly at a slight angle through the nozzle opening 37. Here it will be `broken up and atomized by means of the steam,

and be forced'in a ine spray into the furnace.` This nozzle may also be .regulated to adjust the amount of oil passing through by moving the nozzle 43 back and forth relative to the seat provided within the nozzle 40. This regulation is accomplished by rotating the handle 27 and the air pipe therewith to screw the same longitudinally y in the adjusting member 17, as previously described. Free entrance of air is provided through the channel 28 to the opening 48 in the nozzle. The check valve 49 in the air passage is provided to prevent back firing through the air passa e when explosions take place within the urnace, due to the back pressure therein as sometimes occurs. The air is projected forwardly about centrally of the nozzle and will mix equally with the oil and steam passing in all directions.

It will be obvious that the nozzle may be placed at any reasonable distance from the steam and oil inlets, and the passage of the steam through the chamber 33 outside the oil passage will serve to lheat the oil to the desired temperature so that it may be more evenly sprayed into the furnace and there produce the most effective combustion. The heat of the oil may be somewhat regulated by the amount of air allowed to pass through the central channel 52. The amounts of both steam and oil may be regulated with a very fine adjustment as'will be obvious from the description of the nozzle and the means ,for regulating the size of the passage for the different fluids. The interior formation of the nozzle is such as to discharge the steam and oil in'a spiral spray into the furnace so that a uniform atomization of the fuel in all directions may be accomplished, thus tending to produce the most eflicient combustion of the oil. A

Further objects and advantages of this construction will be apparent to one skilled in the art without further description.

What I claim as new and desire to protect by Letters Patent is:

1. In an oil burner, concentric air, oil and steam pipes spaced apart, said steam pipe being outermost, a nozzle on said. steam pipe v spiraled passages in the outer Vhaving a flaring discharge orifice thereon,

separate inlet means to each of saidppes, valves on the end of said air and oil pipes, and valve seats within said nozzle for control of the steam and oil, there being faces of said valves adapted to discharge Huid from said oil and steam pipes toward said seats in the manner descri ed.

2. In,an oil burner, an outer oil pipe, an

inner air pipe, and an intermediate steam' pipe, spaced apart to provide intermediate passages, a nozzle on said steam pipe having a forwardly flaring discharge orifice, a valve seat within said nozzle a steam valve on said voil pipe, and an oil valve on said air pipe, said air pipe extending be 0nd said oil pipe and valve, said pipes eing adjustable longitudinally to regulate or entirelyclose both the said valves in said nozzle, and means on said valves to direct the fluid from said nozzle ,in a spiral spray.

3. In an oil burner,"`concentric oil, air, and steam pipes spaced apart to provide fluid passages between them, a nozzle on said steam pipe having a discharge opening therein, a, valve seat therein, a Valve on said oil pipe having a tapered forward face to [it said seat and spiral grooves on its outer periphery, a valve on said air pipe seating within said oil pipe valve, and means to regulate said oil and air pipes in said steam pipe. y

4. In an oil burner concentric air, oil and steam pipes, spaced apart, a nozzle on the outer one of said pipes, valves in the passages between said pipes within said nozzle, said valves being constructed to project the luid in a spiral spray from said nozzle, and means to adjust said valves.

In testimony whereof I' hereunto vafiix my `signature this 24th day of April, A. D.-

JOSEPH A. HEBERT.

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