US1807092A - Gas burner - Google Patents

Description

May 26, 1931.

w. scHwAN 1,807,092

l GAS BURNER 'I Filed Aug. l, 1928 3 Sheets-Sheet l amg a@ l MM2? May 26, 1931.

w. scHwAN GAS BURNER Filed Allgl. 1928 3 Sheets-Sheet 2 3mm/1to1, Wehner' Schwan Q f x n.w\ \QN NN( M vw ANW Q May 26, 1931. w. scHwAN 1,807,092

GAS BURNER Filed Aug. 1. 1928 3 Sheets-Sheet 3 `1- lq Q Q l', p l A 'V'm Qq l\ l `-1- @D Nw Syvum/tov -n/erner Schwan l; @M Q# y@ Patented May 26, 1931 .WERNER sor-IWAN, or DALLAS', ,rms

.eAs Brianna Application led August 1, 1928. Serial No. 296,775.

This invention relates to new and useful improvements in gas burners.

The invention has particularly to do with that t pe of burner which is operated under a mec anical draft.'

One object of the invention is to provide a .gas burner of the t pe described, whereby an accurate control oi the amount of air necessary for proper combustion of a given amount of gas is had and a thorough and intimate mixture of the air and gas is produced in the combustion chamber.

A particular object of the invention is to provide means `for delivering the gas into the path of the air at right-angles to the line of travel of said air and not onl fprior to combustion but at a point removed7 rom the point of combustion, whereby a, thorough gaseous mixture is produced. Another object of the invention is to provide a burner ti whereby ignited gas or a flame is charge en of the burner, thus assuring more complete combustionv and also guarding against extinguishing of the iiame, either by excessive draft or an impoverished gas supply.l

A still further object of the invention is to provide means for deliveringl as 4transversely or radially of the path of t e air and at the same time deiiecting both the air and gas against the walls of the air tube, whereby a more thorough mixture of the airand gas is carried out.

A construction designed to carry out the invention will be hereinafter described, to-

gether with other features of the invention.

The invention will be more readily understood from a reading of the following speci--V 4o ication and by reference to the accompanying drawings, in which an exampleof the invention is shown, and wherein:

Fig. 1 is a plan view of a burner assembly constructed in accordance with the invention, Fig. 2 is an enlarged cross-sectional view taken on the line 2 2 of Fig. 1, f Fig. 3 is a similar view showing the damper open,

Fig. 4 is an enlarged longitudinal sectional view of one of the burner nozzlesz rovi ed contiguous to the dis- Fig. 5 is an enlarged cross-Sectional view taken on the line 5-5 of. Fig. 4,

Fig. 6 is. an enlarged horizontal lcrosssectional View taken on theuline 6--6 of 4, i 1g. 7 1s an end Yelevation of the burner,

Fig. 8 is aside elevation of a burner and blower showing an automatic controlling means,

Fig. 9 is an end elevation of the same, the blower being omitted, and

Fig. 10-is an enlarged horizontal crosssectional view on the line 10-10 ofFigS.

1n the drawings the numeral 10 in ig. 1

designates a blower whichmay be driven by an .electric motor 11 or any other suitable y means, and from which a tubular header 12 extends. The header is closed by an end cap,

1 3 and may be of an suitable length according to the number o burners which are Ito be connected thereon. The invention contemplates theuse of a plurality of burners, as is shown in Fig. 1, or'a single burner, as is shown in Figs. 8, 9 and 1() and which will bei more particularly described.

Referring to Fig. 1 it will be noted that the header 12 is provided with a T 14 foreach burner, said tees being suitably spaced and permitting the burners to be connected at right-angles to the header. Each burner includes, as is shown in detail in Figs. 4 to 7 inclusive, a mixing T 15. The T is inters @I nally screw-threaded at each end and an elongated mixing tube-16 is screwed into one end of said. T. A nipple 17 is screwed into the opposite end of the T and this nipple may be screwed into the T 14 to connect the burner with the header 12. An important feature' of the T is an elbow 18 cast integral there.- with andextending axially and radially of said T. A gas supplly pipe 19is'screwed into ofthe air blowing through the tu v16 is Y approximately twov ounces or less.

n the end of the nipple 20 I mount a detlector 21 which consistsl of an elongated tubular body having a flat -circular head 22 closing the end of the body and projecting radially beyond the same.- Flush withthe inner side of the head the deiiector is provided with a plurality of radial ports, 23. The gas delivered to the deiiector strikes the flat head and is thus deflected radially throughthe ports 23 at right angles to the path of the air iowingthrough the 'tube 16.

It will be noted that the head 22 of the deiector projects radially beyond the body thereof and thus extends into the path of the air passing along the tube 16. This will cause a deflection of both the air and gas, whereby it will be thrown into contact with the inner wall of the tube from which it will rebound, thus setting up an oscillation of the fluid currents which will effect a more thorough mixture. The deector which alsohas the function of a spreader is located near the central portion of the tube and at some distance from the discharge end of said tube,

which will give the air and gas full oppor-vr tunity to commingle and produce the proper mixture; however, the deiiector is not located far enough from .the discharge end ,of the nozzle as to allow undesirable conditions bei` `fore being i ted..

The gas ein vdelivered transversely of the path of the air will cause a more thorough mixing and the production of a highly combustible gaseous iiuid. The volume of the air will be many times that of the gas, therefore, making for economy as well as eiliciency. The air being under a mechanical draft will tend to carry the gas away from the defiector, thus preventing back pressure when a low pressure of gas'is supplied. Although the air is introduced by a fan or other blower it need not be under a high pressure because successful tests have been made where the air was under pressure on only one-half an ounce.

On the outer end of the tube a nozzle head 24 is screwed and this head has an internal bore equal in diameter to that of thetube. The end of the head which constitutes the tip of the burner, is slightly reduced at' 25 and a ti ring 26 is inserted in the reduced 'end of t e head. The ring comprises an in# wardly displaced annular iange 27 and a beveled inner bell 28, which converges from the wall of the head to the inner wall of the flange. The. an'ge' 27 in conjunction with the reduced annular ti of the head provides an annular space or c amber 29 and radial ports 30 extending through the'base of the iiange permit the gaseous mixturev to enter said chamber.

The gaseous mixture produced at the de- -not ignited for several inches from the tip larly important where more than one burner l *ifaezoea will be projected from the end of the head lin to the fire box, but a ring iame will burn contiguous to the chamber 29. This is an important feature because usually the iiame is of the burner and excessive drafts or 1m- `poverished gas supply would cause the ordinary flame to become extinguished; however by provision of the ring ame this woul verge and compress the gaseous fluid and reduces, the resistance offered to the discharge of the same.

'In Figs. 1, 2 and 3 I haveshown a damper 31 mounted in the nipple 17. This damper is shown closed in Fig.A 2 and open in Fig. 3. It is obvious that by regulating the damper the volume of air flowing through the nipple 17 may be regulated and this is particu- 9oV is connected with a single header. The damper may be used or it may be omitted.

In Figs. 8 to 10, inclusive, I have shown the T 15 connected with a nipple 32, which in turn is connected with an air blower 33. A damper housing 36 is connected in the gas pipe 19 and includes a damper 37 mounted on a crank-shaft 38. The crankshaft 35 has a plurality of spaced apertures 39l for receiving a bolt 40 engaging in spaced apertures 41 in a link 42, which is connected with a crank 43 mounted on a rock-shaft 44 journaled on the nipple 32.

It will be seen that by rocking the shaft 44 and swinging ,the crank 43 the damper 34 will be actuated by the parts 35 and 42. By adjusting the bolt 40 in the apertures 39 and 41, the relative throw of the damper will be varied in proportion to the swing of opposite end for receiving a bolt 47 engaging in spaced apertures 48 in the crank shaft 38, whereby the dam er 37 may be 115 swung and the amplitude o its swing controlled in proportion to the swing of the damper 34.' By reason of the adjustments the twovdampers may be set to supply any iven amount of air and gas, as is obvious, and when the shaft 44 is operated the control of the 'airand gas supplies becomes automatic.

vFor operating the shaft 44 a lever 49 is' fastened thereon and carries a weight `50 to 125 which a iexible connection 51 is attached. The connection 51 may be connected with any kind of a-controlling device so vthat by a manipulation of said connection the suppl of air and gas is automatically proportione d be avoided.- The bell 28 tends to con- 80 i' connections rom said lever to said arms for l the inlet en operating the dampers in a xed .ratio of movement, and means for varying the point of attachment of said connections to said arms for changing said ratio.

2. In a gas burner, a mixing tube, a gas supply pipe connected with the tube, an air supply pipe also connected with the tube, a

rotative gas control valve connected in the gas pipe, an air control valveconnected in the air pipe, each valve having a crank, a link connected with the crank of the air valve, a pitman connected with the crank of the gas valve, a rock shaft to which said link and pitman are connected for joint operation to move one valve in a iixed ratio of movement to the'other valve, and adjustable means upon said link and pitman for changing said ratio of movement. y

3. Ina gas burner, a T havinga reduced elbow extending radially and axially thereof, a mixertube connected to one end of the T,

' an air supply pipe connected to the opposite end of the T, a de'lector within the tube connected with the elbow and disposed laterally charge ports thereof, the deiector plate being v greater in area than the greatest cross sectional area 'of the gas sup ly pipe.

6. A gas burner inclu 'ng a mixing tube, an air supply conduit communicating with the inlet end of the tube, a gas supply pipe contained within the tube having acircumferential series of gas discharge ports located inwardly of and relatively remote from the discharge end of the mixing tube, and a deiector plate provided on the end of the gas supply pipe adjacent to and beyond the discharge ports thereof, the deflector plate being greater in diameter than the diameter of the largest portion of the gas supply pipe.

7. A gas burner including a mixing` tube, an air supply conduit communicating with the inlet end of the tube, a gas supply pipe i' contained within the tube having a circumferential series of gas discharge ports located inwardly of and relativelyremote from the discharge end of the mixing'tube, and a de- 1 A Hector plat-e provided on the end of the gas supply pipe adjacent to and beyond the dis charge ports thereof, the peripheral marginn of the deector plate extending beyond the outer periphery of .the adjacent end portion of the gas supply pipe. In testimony 'whereof I a my signature.

l WERNE SCHWAN.

to Vdeiiect air and gas into contact with the A tube and having a s1n le series of: radial ports at'the inner face ot t e deector, and a head `mounted on the outer end of the tube andA l havmg a reduced tip located remote from said orts to form a mixing chamber beyond the efector.

4. A gas burner including a mixing tube, an air supply conduit communicating with the inlet end of the tube, a gas supply' pipe contained within the tube having a circumferential series of gas discharge ports located inwardly of and relatively remote from the discharge end of the tube, anda deflector plate provided on the end of the gas'supply pipe adjacent to and beyond lthe discharge ports thereof, the detlector plate being greater in area than the cross sectional area o-the discharge end of the gas supply pipe.'

5..A gas burnerincluding a mixing tube,V

an air suppy conduit communicating with of the tube, a gas supply pipe contalned withln the tubel having al circum-v ferential series of gas discharge ports located l inwardly of and relativelyremote from the discharge end of the mixing tube, and a de- `lieotor plate prpvided on lthe .end of the as supply p1pe ad]acent to and beyond the s-

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