US2393887A - Combination gas and oil burner - Google Patents

Description

Patented San. 29, i9 ;--:1

UNl'lEE STATES PATE COMBINATION GAS AND OIL BURNER.

William A. Clements, Glendale, Calif. Application November 14, 1942, Serial No. 465,571

8 Claims. (Cl. 158-11) This invention relates to improvements in comwhen not needed and is in Figs. 3 and so shown bination gas-oil burners. ,It is the general object removed. In a gas burner as here shown only of my invention to provide a Simple and inexlow pressure air is required, and it is understood pensive device in which conversion from one type that conventional means hould be included for of fuel to another may be effected without di 5 pr p rly regulating the pressure relations .to suit turbing or interrupting the operation of the particular furnaces and heat requirements, in

burner. A further object is to provide simple addition to which the sleeve valve may be rotated and convenient means for quickly effecting such to vary the flow through the port 3. conversion while the burner is in fulloperation. i A pipe Ill-extends from a fuel oil inlet into the A still further object is the provision of means .1 stem land it isshown fitted at the forward end' for feeding high or low pressure air, or both, to with a nozzle, or spreader II. A valve 12 conthe burner as may be required in order to obtain trols the flow of fuel oil through this pipe and a desired fuel mixture or a particular degree of spreader. When it is found necessary to change gasiflcation of liquid fuel. Another object is to from gas to liquid fuel, it is merely required to provide means for adjusting the flame length to 15 set a valve 13 to shut off the gas supply and to suit particular installations. open the valve I2 to cause the liquid fuel to pass These objects, as well as the various advaninto, thebumer. It is, however,; necessary to tageous features of the invention will be appreatomize, or rather to gasify the liquid fuel before ciated upon perusal of the following detailed de- 0 it passes into the firing chamber, and this is acscription, and reference is invited to the accomcomplished by passing air under high pressure panylng drawing in which structures embodying through the pipe! into the annular space 5 surthe invention are illustrated. rounding the liquid fuel .pipe l0 and thence I th dr ing: through orifices ll of the spreader H into a Fig. l is a side elevational view, partly in sec- 2 chamber I, there tostrike the incoming fuel with tion, of a device embodying the invention; great force. The mixture now entering the firing Fig. 2 is a cross sectional view thereof taken chamber has become sufficiently gasified or aerisubstantially on line 2-2 of Fig. 1 in the direction form substantially to compare with the gas enterof the arrow; ing the firing chamber in the setting of the burner Fig. 3 shows the main portion of Fig. 1 but in 0 above first described. And as the passage of low a diflerent position of adjustment and with parts pressure air from the inlet 4 through the sleeve broken away for the sake of clearness; valve to the firing chamber remains unchanged. Fig. 4 is a cross sectional view taken on line it is Seen that, whether gas or liquid fuel is fed 4-4 of F1g,3; and tothe burner, the resulting combustion remains Fig. 5 isa fragmentary view illustrating certain tia y-un ged nd the operation may minor modifications of t d continue without interruption. It is also impor- The structure of my invention, in the form n o note that this conversion is effected by illustrated in the drawing, comprises a cylindrical the mere adjustment or the setting of two valves. casing l', within which a sleeve valve 2 is fitted to A further advantage o s r ngement is that rotate, and the latter has transversely extending the r e V l m f r entering the ng cham-' therethrough a port 3 for registration with an remains at w pr ssu d that the amount airv supply ml g 4, A tubular te 5 extends of high pressure ai needed for fuel gasification through the center of this valve and it terminates is relatively very small. A considerable saving at the front end in a nozzle 8. To facilitate ,rotaof power for air compression may thereby be eftion thereof, the valve is shown fitted with a fected, even when liquid fuel is used over an exhandle l9. tended period of time.

Gas passes through a pipe 1 to the annular space In installations, however, where ample supply within th stem I, thence to flow through the .of air under high pressure is available; and the nozzle 8 into a chamber 8 where it becomes mixed feature of power conservation is not of major with the air flowing through the sleeve valve and importance, or where facilities for concurrently where the firing occurs. The chamber 8 is, for supplying both high and low pressure air are not this reason, termed the firing chamber of the at hand, the device may readily be readjusted to device. A hood 9 is shown fitted to the end of fuel Oil consumption in the following manner.

the casing for use when a short flame of greater It is noticed that a passage It leads from the intensity is needed. But it may be removed space within the stem 5 through the outer wall of sleeve valve, and'that this passage in Figs. 1 and 2 is shown out ofl by the outer wall of the casing i. But the sleeve valve may be rotated until this'passage opem into the air-inlet 4, see Fig. 4, to permit air to pass through the latter and into the annular space surrounding the fuel oil pipe II. The valve I l is, at the same time, set entirely to cut oil the inlet to pipe I. The result is that air under high pressure passes through port 3, the passage l5 and the perforations li or the spreader into the chamber it, there to gasify the liquid fuel sprayed thereinto. Also that the greater portion of the same high pressure air passes through the port I and the sleeve valve to the firing chamber I. It is important to note, however, that the sleeve valve may be rotated to restrict the flow of air through this port, as above.

mentioned, without disturbing the now through the passage II and that, by cutting down the flow through port 3 in this manner, the high-low air supply relation above. referred to may be substantially duplicated.

It is desirable to provide a series of vanes IS in the passage from the sleeve valve to the firing chamber, substantially as indicated in Fig. 1,- for the purpose of setting up whirling movement in the air rushing through this passage and thereby more thoroughly to mix this air with the gasified fuel.

The device as hereinbefore described constitutes a short flame burner, but it may readily be converted into a long flame liquid fuel burner substantially in the manner illustrated in Fig. 5. In this drawing, the nozzle, 6 has been removed and a sleeve l8 fitted to slide within the stem 5. When this change is made, the liquid fuel and air are premixed in the manner described, but because the sleeve i8 has been added, the finally mixed fuel is delivered through the end of the casing into thefumace'served by the burner. In order more effectively to control the length of the flame, it is also desirable to be able to adjust a,sas,aa7

opening of the casing, a fuel conduit within said first namedconduit terminating in a spreader.

said valve having a passage into said firstnamedconduit, and means for rotating said valve to bring said-passage into registration with said air inlet to control flow of air through the passage and the first conduit and then through the said spreader. 2. A fuel burner comprising. a casing open at the front end and having an air inlet, a sleeve valve seated for axial rotation within said casing for passing air from saidinlet to said front open- 1 ing, a conduit within said valve terminating in a nozzle near the front opening of the casing, a fuel conduit within said first named conduit terminating in a spreader behind said nozzle, said valve having a passage into said first named conduit, means for rotating said valve to bring said. passage into registration with said air inlet to control flow of air through the passage and the first conduit and then through said spreader,

said fuel conduit being .axially adjustable within the first named conduit.

.3. A fuel burner comprising, a casing open at its front end and having an air inlet in its side wall, a' .valve fitted to rotate within said casing to control said inlet, said valve having a passage and a valve controlling flow through said liquid the spreader ll andv the extension sleeve I8 axially within the stem 5. The fuel pipe I 0 is to this end seated for axial movement in the head ll of the inlet pipe 1 and such adjustment may readily be efiected by gripping the elbow 20 of the pipe I0 which, for the purpose of this description may be considered an operating handle. It

is, of course, in such case necessary to provide leakproof stufllng boxes within the head l1, but assuch are commonly used, it is not thought necessary herein to make further mention thereof. a.

i It should be clear to anyone versed in the particular art that I have provided a combination burner for gaseous and liquid fuel of simplicity and convenience of operation. Also that, whether one kind of fuel or the other is fed to the burner, substantially the same aeroform mixture can be supplied to the firing chamber by the mere setting of one or two valves.

It is not, however, my intention to be limited to the precise combinations illustrated in the drawing, but I reserve the right to embody such further modifications as will come within the scope of the claims hereto annexed.

I claim:

I l. A fuel burner comprising, a casing open at the front end and having an air inlet. a sleeve valve seated for axial rotation within said casing for passing air from said inlet to said from; opening, a conduit within said valve andforming part thereof terminating in a nozzle near the front fuel conduit, said port and said transverse duct being so positioned that either or both may be brought into and out of registration with the casing inlet upon manual rotation of the valve.

4. A fuel burner comprising, a cylindrical casing terminating at the front end in an open end firing chamber and having an air inlet in its side .wall, a sleeve valve fitted to rotate within said casing to control said inlet, said valve having a tubular stem axially extending from the rear end thereof to said firing chamber, there being between the outer surface of said stem and the inner surface of said sleeve valve an annular space opening into said firing chamber, the valve ;having a port through its outer wall from said annular space for registration with the casing air inlet, an oil conduit leading into said tubular stem, there being an annular space between said conduit and the inner wall of the stem, a supply pipe communicating with the annular space surrounding said oil conduit, and a valve in said pipe having gas and compressed air inlets, said valve being adjustable to open a passage from one inlet thereof or the other or from both inlets to the space surrounding the oil conduit.

5. A fuel burner comprising, a cylindrical casing terminating at the front in a firing chamber through its outer wall from said annular space for registration with the casing inlet,'a conduit asaass'r for passing gaseous fuel and compressed air into said tubular stem, means controlling the flow through the conduit, a valve controlled oil supply pipe extending into and axially adjustable within said tubular stem and terminating'therewithin in a spreader, and a hood detachably mounted on the casing at the outer end of the firing chamber.

6. A fuel burner comprising, a cylindrical casing terminating at the front end in an open front firing chamber'and having an air inlet through its side wall, a sleeve valve seated to rotate within end thereof to said firing chamber to provide an annular space encompassing said stem and opening into the firing chamber, the valve having a port through its outer wall from said annular space for registration with said casing inlet and a passage leading directly from the space within said stem to the outer surface of the valve for registration with the casing inlet, a liquid fuel conduit freely extending into the stem, and means controlling flow of fuel through said conduit.

7. A fuel burner comprising, a cylindrical casing terminating at one end in a firing chamber and having an air' inlet through its side wall, a sleeve valve seated to rotate within said casing to control said inlet, said valve having a tubular stem axially extending from the rear end thereof to said firing chamber to provide around the stem tion with the casing inlet, a liquid fuel conduit freely extending into said stem, means controlling fuel fiow through said conduit, a second conduit leading into the stem, and means in said second conduit adjustable to pass gaseous fuel and compressed air through the space within the stem encompassing said liquid fuel conduit to the firing chamber.

8. A fuel burner comprising, a. cylindrical casing terminating in an open end firing chamber and having an air inlet through its side wall, a sleeve valve fitted to rotatewithin said casing to control said inlet, said valve having a tubular stem axially extending from the rear end thereof to said firing chamber, there being between the outer surface of said stem and the inner surface of the sleeve valve an annular air space opening into said firing chamber, the valve having a port through its outer wall from said annular space for registration with the casing inlet, a nozzle

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