US1432071A

US1432071A - Liquid-fuel burner

Info

Publication number: US1432071A
Authority: US
Publication date: 1922-10-17
Anticipated expiration: 1939-10-17

Description

A. Nlt LOCKETT.

LIQUID FUEL B,URNER.

APPLlcATxoN FILED JUNE 1o. 1920.

Patented Oct. 17, 1922.

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`Patented Get. 17, 1922.

UNITED ,STATES PATENT OFFICE.

ANDREW M. LOCKET'I, 0F NEW ORLEANS, LOUISIANA, ,ASSIGNOR '110 A. M. LOCKETI & C0. LTD., 0F NEW ORLEANS, LOUISIANA, A. CORPORATION OF LOUISIANA.

LIQUID-FUEL BURNER.

l.eippiicatnm inea :une 1o, 1920.' serial No. 387,940.

To all ywhom t mag/vpcoacerfn: l y p Be it known that I, ANDREW M. Locnn'rr, a citizen of the United States, residing at State of Louisiana,have invented certain new and useful Improvements in Liquid- Fuel Burners, of which the following is a specification.

My invention relates to liquid fluid burners and more particularly to fuel oil burners or atomizers which consist of an oil pipe and a steam pipe entering any form of burner tip in which the steam and oil emerge from the burner in separate openings or slots arranged one above the other.`

The objects of the invention are to be so construct and arrange the burner, oil and steam supply pipe with respect to each other and said burner, with a pressure or spring controlled check valve, so that when the oil supply is cut off from the burner, the oil remaining within the burner and other parts subjected to the heat of the furnace is automatically and entirely blown out or discharged from said burner and cooperating heated parts, thereby preventing the earbonization of oil in the burner or its parts, and interfering with the continuous or renewed operation of the burner or proper shape of flame formed by the burner tip when the oil and steam are again supplied and the burner put in service.

,Another and most important object of the invention is to make a fuel oil burner entirely safe and free from'any possibility of vandavoid the earboniaation of oil in the -burnerslthere was provlded and arranged a flare back which usually occurs with burners as now constructed and arranged and due to the large volume of oil entrapped in the long pipe connection between the cut off valve and burner tip being suddenly blown into the highly heated furnace after the oil is shut offi and the steam is rapidly and. manually diverted'into the burner and its oi l. pipe connections'by the fireman.

- Other objects .and advantages ofthe invention will appear from the v"detailed description of the .construction and manner'of assembling yand operation which willV be presently given.

The invention consists of structural characteristics and relative arran ements of elements which will be hereinaer more fully described and particularly pointed out in the appended Claims. l

out and repeatedly demonstrated, sooner or later and in the best regulated in- In the' drawings, in which similar reference characters indicate the parts 1n the sevy 'eral figures, New Orleans, in the parish of Orleans and y lFigure l, is a side elevation partly in sectioi of the improved burner arrangements; `an

lFigure 2, an enlarged-and sectional view of the valve used in connection with oil and steam supply pipes.

In the use of liquid fuel for furnaces the burner is usually projected slightly into the fire `chamber of the furnace, and were it not for the cooling effect of the steamy and oil entering said burner, it would become highly heated bythe high temperatures generated land existing in the fire chamber'. When the oil is shut off and the llame of theburner is extinguished, although there may @be no other burners in use in the furnace, the heat radiating from the highly heated fire bricl would be suflicient to carbonize any oil remaining in the burner, thereby lcausing the particles of carbonto partially or completely close up the burneror connecting sections of pipe whichwould interfere with the proper How of oilto the burner or efIin ycient shape of ame produced by the tip of the burner when the oilv is againturned on ifurnacey put in service. The foregoing conditions and bad results would be more likely 'to occur, if in the case of a furnace operating several burners, one of which be temporarily shut down by reason of reduced steam consumption or heating requirements.

. Previous to my invention to take care of steam'connection with the oil pipe, so that immediately aftershutting downr the burner by eutting'off the oil supply, the reman by manual operation, and it has been found that dustrial plants, the fireman will fail to make use of the above indicated steam connection,

resulting in trouble with the burner as described. To overcome all the objections and 4failures herein pointed out, and remove the necessity of a separate operation and all rcsponsibility of the fireman to blow steam through the oil pipes, this invention was devsed.

, are the liquid fuel or oil supply pipe and pressure or steam supply pipe 16, which may be surrounded by the centering casing 17 suitably supported therein and carried by the eenteriiig'castings 18. 19 is a pipe yconnected with a suitable liquid fuel or oil supply under pressure and provided with a valve 20 foncutting off said fuel supply when desired. Between said valve 2O and oil supply is preferably interposed a combinedstrainer and regulating valve 21, controlled by hand wheel 22, as shown for example in U. S. Patent No. 1,206,5544 to Bernard' S. Nelson and dated Nov, 28, 1916, and while it is contemplated using such a strainer it is not absolutely essential in carrying out the present invention.

A pipe 23 connected to any suitable supply of pressure as steam is in communication with the steam supply pipe 16., and is provided with the usual cut ofi? valves 24: and 25 controlled by hand wheels 26 and 27, respectively, and interposed between' said valves 24k and 25` is a strainer 28., and by closing said valves 24 and 25,l the strainer 2S can be readily removed, inspected, cleaned or repaired without disturbing the other parts of the burner.

29 is a branch. pipe connecting the interior of the oil supply pipev 15. with the source of steam supply, and while I have shown and preferably use the branch pipe 29 in connection with the strainer 28 and valve 24, such an arrangement is not essential and could be varied or modied without in any Way departing from the broad application of the present invention. A pressure actuated or spring controlled check valve 30 is provided in said branch pipe 29, and as shown in Fig. 2 consists oill a vvalve disk 31 cooperating with and normally held to itsv seat by means of a coil spring 33, sur-- rounding a valve 'spindle 34; 'and interposed between a disk 35, fixed to the spindle 34.- and a dish capable of movement along said spindle by properly turning` the screw plug 37' when cap 38 is removed, as will be readily understood and needs no further disclosure, and while l have shown this as my preferred form Aof pressure actuated valve, any other form of this type of valve may be readilysubstituted without in any way changing the essential features and operation of lthe presentinvention.

of the spring 38. and pressure of the oil within the pipe 29 while passing through strainer 21 to the oil supply pipe 15. Should it be desired to extinguish the burner, the valve 2O is closed thereby cutting; oil' all supply of oil to the strainer."

21|., sugply pipe 15 and burner tip 10, and when this is done, the pressure within the strainer 21 and its connecting branch pipe and on one side of valve dish 31 is reduced to such an extent that the steam pressure within the valve 241', and the section of branch pi pe 29 connected with the automatic valve 30, and on the opposite side of the valve disk 31 will be such as to. automatically lift said disk 31 olf its seat 32 and `gradually allow the steam to pass through said valve 30, branch pipe 29, through strainer 21 into oil supply pipe 15, and out of slot 11 of the tip 10, and in so doing thoroughly and automatically blow out slowly all liquid fuel or oil remaining in said oil pipe 15 and entrapped in said pipe 15 und strainer 21 between. the cut off valve 20. and burner tip. 10, and prevent any possibility of clogging up or fouling of the burner tip or oil pipe connection therewith, due to carbonization of the oil as is usual in fuel oil burners where through neglect or forgetfulness the burner not blown out after the fuel has been out oil.

From the foregoing disclosure of the construction and operation of the invention, it will be seen that the objects and advantages of the present arrangement pointed out in the statement ofv invention 'are fully and efficiently carried out, and that there has been devised a burner which is not only guaranteed to operate contiiuiouslyand with.

uniform heating.; Capacity, but at the Same time is absolutely safe and fool proof in its operation. lt will also he understood that many changes and modifications will. readily suggest themselves to. any one without departing from the essential features and spirit of the present invention, and therefore wish it to be distinctly understood that I do not limit myself lto the specific arrangement and construction herein shown and d escribed. What I' claim is :--V v 1. A liquid vfuel burner comprising a burner tip, a liquid fuel supply pipe connecting said tip with a fuel supply, means for cutting olf the fuel supply into said supply pipe and to the burner tip, a branch pipe leading from a source of pressure into fuel supply pipe, means separate and independent of the burner tip in said branch pipe and so constructed and arranged to automatically open and close communication between said source of pressure and fuel, supply pipe respectively by the cutting olf and in the fuel supply tosaid fuel supply pipe, whereby any fuel remaining in said fuel supply pipe and burner tip after the fuel supply is cut olif is automatically blown out to prevent carbonization of fuel and iouling of the burner.

A' liquid fuel. burner comprising a burner tip, a liquid fuel supply pipe connecting said tip with a fue] supply, a valve for cutting off the fuel supply into said supply pipe and to the burner tip, a pipe leading from a source of pressure to the burner tip for atomizing the fuel, a branch pipe connecting said source of pressure with said fuel supply pipe at a point intermediate the burner tip and valve for cutting olf the fuel supply, and a separate and independent pressure controlled valve in said branch pipe adapted to be reacted upon by the pressure within the fuel supply pipe and so constructed and arranged to automatically open and close communication between said source of pres sure and fuel supply pipe respectively by the closing and opening of the valve cutting off the fuel supply.

3. A liquid fuel burner comprising a burner tip, a liquid fuel supply pipe connecting said tip with a fuel supply, a valve for cutting olf the fuel supply into said supply pipe and to the burner tip a pipe leading from a source of steam pressure to the burner tip for atomizing the fuel, a branch pipe connecting said source of steam pressure with. said fuel supply pipe, and a valve independent of the burner tip in said branch pipe normally closing communication between the fuel supply pipe and source of steam pressure when the valve for cutting olf the fuel supply is open and automatically open communication through said branch pipe between said fuel supply pipe and source of steam pressure through the burner tip when valve controlling fuel supply? is closed.

4L. A liquid fuel burner comprising a burner tip, a liquid fuel supply pipe connecting said tip with a fuel supply, a valve for cutting` olfy the fuel supply into said supply pipe` and to the burner tipi, a pipe leading from a source of steam pressure to the burner tip for atomizing the fuel, a branch pipe connecting said source of steam pressure with said fuel supply pipe at a point intermediate the burner tip and valve for cutting off the fuely supply, and a valve in said branch pipe Without the burner tip and reacted upon and held to its seat by the pressure within fuel supply pipe and normally closing communication between the fuel supply pipe and source of steam pressure when the valve for cutting off the fuel supply is open and automatically opens communication through said branch pipe between said fuel supply pipe and source of steam pressure when valve controlling fuel supply is closed.

In testimony whereof I aix my signature.

ANDREW M. LOCKETT.