US1731306A - Gas burner - Google Patents

Description

l Oct. 15, 1929. G, L. HlLEMAN 1,731,306

GAS BURNER Filed Feb. 23, 1928 v Eig 5.7.1757 ,E7 Zf/y/v Z. /725/7/4 Patented ct. `15, 19,29

vUNITEDI STATES PATENT-OFFICE GLENN L. HILEIYIAN, OF.DENVER, COLORADO p GAS BURNER Application led February 23, 1928. Serial No. 256,254.v

gas is turned off, for the air and gas mixture will burn down into the burner tube, and cause an explosion therein.

The principal object of this invention is to provide a gas burner which will quietly ignite or extinguish and yet which can handle to' secure a short,

a large amount of air so as high temperature fiame. I

Another object of the invention is to provide meansfor feeding auxiliary air directlyy to the combustion zone so as to effect a more complete combustion and a higher tempera-I ture flame.

Another object is to provide independent set regulations for both the auxiliary airv and the main air and so arrange these set regulations that they will act dependently to automaticallyv proportion the total air to the total gas flow.

Still another object is to provide means for effectively supporting the main gas and air manifold within an auxiliary air manifold so that its position can be adjusted therein and so that 'combustion will take place within a surrounding sheet of fresh air.

A further object is to provide a burner tip of special design which will not rapidly deteriorate from the 'intense heat of the flame and which can be quickly and easily replaced.

A still further object is to provide an igniter or pilot burner tip which will not be aected by the chemicalv action of the constantly burning pilot flame and in which the flame will. be protected from extinguishing drafts.

Other objects and advantages reside in the detail construction of the invention, which is Vdesigned for simplicity, economy, and

difliculties 'encounp.

merljr occupied by eficiency. These will become more apparent from the following description.

In the following detailed description of the invention reference is had to the accompanying drawing which forms a part hereof. 55 Like numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing:

Fig. 1 is a longitudinal section through 60 my improved burner taken on the line 1-1, Fig. 2.

Fig. 2 is a Fig. 3 is a front View of paratus. l

Fig. 4 is a detail viewL of the stationary face plate.

Fig. 5 is a detail section through the igniter or pilot burner taken on the line 5 5, Fig. 2.

The invention comprises a burner base 10 70 of re clay or similar refractory heat resisting material. The base 10 is formed in segments to facilitate its installation through the doors of a furnace. In conversion installations the usual grate bars are removed and the burner base 10 is placed so that the top face will be on a level with the position forthe top of the grate bars. The burner base 10 contains a tapered central opening which we will designate as the auxiliary vair opening 11. This opening surrounds a burner tip 12 whichis formed of some highly fire resistant refractory material plan view thereof.l`

the complete ap- Yand provided with Ya plurality of angularly placed flame orifices 13. The burner base 10 85 is supported upon a relatively large elbow casting 14:,which connects with an auxiliary air pipe15..

j The outer extremity of the pipe 15 is secured in a regulator casting 16. Across the face of the regulator casting 16 a fixed face plate, shown in detail in Fig. 4 and designated by the numeral 17, is secured. This face plate supports a Venturi tube or mixing chamber 18 within the auxiliary air pipe 15. The burner tip 12 is supported in a tip holder 19 carried from an elbow 20 on the mixing chamber 18. The tip 12 can be adjusted t0 a concentric position within the opening ll'by means of set screws 21 which pass through the pipe 15 into 10o contact with the mixing chamber `18. Ggas is fed to the burner from a gas supply pipe 22 which passes concentrically through the face plate 17 terminating in a nozzle 23.

The total volume of air tothe burner is controlled by'means of a damper plate 24 which is rotatable about the gas supply pipe 22 and y is maintained in Contact with the faceplate 17 by means of a set collar 38 upon the gas pipe 2 2. The damper plate24'is provided With anouter seriesof openings which corre- Spond in vnumber and spacing with a similar series o-f openings'in the face plate 17 toadmit air to the auxiliary air pipe 15. The

ner series of openings in the damper plate' to' the mixing chamber 18 is controlled by means of a circular primary air plate 26 having openings Which register With the inner series of openings inthe `damper plate. f

IThe auxiliary air plate 25 and the primary plate 26' may be both locked in any desired position upon the damper plate 24 by means of clamp nuts 27 which are carried on studs projecting from the damper plate. Thus when the primary and auxiliary plates are lockedl in position they must always move' ,.Wlth.

and as a part ofthe damper plate.

The damper plate is moved upon the face plate 17 by means of a lever 28 4which projects therefrom. This lever is connected by means of a link 29 to a lever 30 of a gas valve 31. The link .29 is connected to the lever 30 by means of a in 32 in the lever adapted to travel in a slotte opening 33 inthe link. The gas,

valve lever 30 is raised or lowered by a cable or chain 34 from any manually or thermostaty ically controlled apparatus. A IWeight 35 is provided to return thedax'nper plate to its closed position. The movement of the damper plate is'limited by an arcuate slot 36 therein which rides over a pin 37 extending from the regulator 16 through thefface p1ate17.-

Ignition of the burner' is accompliashedlby means of a small pilot flame. Gas 1s supplied to this iame by means of. a pilot tube 38 which extends upwardly into the burner block 10 terminating against a pilot tip 39.- The pilot tip 39 is wedge-shaped and is forced into a similar Wedge shaped hole in the base block 10. The pilot tube 38 is cemented into `the base block against the bottom of the pilot tip 39 as shown at 40. i'

By this arrangement there is no .metal inl contact with the pilot flame vand the flame is protected by the base block fromdrafts. All

`position of the damper plate,

the invention.` f vHaving thus described the invention, what surfaces with which the fiame contacts are of refractory material so that the trouble usually encountered with pilot tips is not present in this invention. Heretofore such tips have been of metal which the pilot iiame quickly corrodes and eats away.

Assuming the pilot name is burning,` to.

start the burner the lever 30 is raised. The first movement of the lever 30 opens the gas valve 31 allowing pure, unaerated gas to now through the mixing chamber and out of the burner openings 13. This' gas is imm'ediate-A ly'ignited by the pilot flame, but since there is no appreciablev air-in the mixing chamber, the name will not Iburn down .therein and cause 'an explosion. It therefore ignites quietly as a luminous flame. l

F urther movement of the'lever`30 brings thepin 32 to the end of the slot 33, draws ,upon the link 29 and rotates the damper plate 24, thus admitting air to the flame through both the mixing chamber and the surrounding auxiliary. air passage. This air immediately changes the nature of the name to a heatingflame without explosion.

When it is desired to shut 0H the burner entirely, the lever 30 is lowered and the weight 35 immediately Ycloses the damper plate .24 against the stop pin 37 so. as to shut 0E all air to the flame. Gas' is still owingthrough the mixing chamber however, and, when the' air is shut olf theI flame changes back to the. 'quiet luminous type, which may be quietly extinguished by entirely closing the gas valve 31. There is no explosion at the close because at this time only pure gas is contained within? the mixing chamber and no air is present for combustion purposes. f

The burner should be regulated rst by means of the primary plate 26 to obtain a short, hot, I'iame. The auxiliary air is then regulated to supply all the air to the ilame should then be locked into position upon the damper platefafter which,regardless of the the proportional regulation will be correct.

`that it can conveniently use. The two plates It is easy to replace ythe burner tip l12 when necessary as it rests within .a tapered cup-like depression in the tip holder 19, the taper of which insures a tight joint;

It is essential that the burner openings 13 open outwardly at an angle so as to intimately mingle the flames with the air from the auxiliary opening 11. A

While a speci c form of the improvement has been described' and illustrated herein, it is be varied, .within the scope of the appended claims, without departing from the spirit of I claim and desire secured by Letters Patent Is,: v l

1. Iny agaSburnQrhaVng a mixing chamdesired to be lunderstood that the same may controlling the air supply to both said mixing chamber and said air passage comprising, a face plate closing both said chamber and said passage and having openings communicating with each; a damper plate having corresponding openings movable on said face plate so as to control the openings therein; a first regulator plate having openings adapted to register with the openings in the damper plate which control the air to the air passage; a second regulator plate having openings adapted to register with the openings in the damper plate which control the air to the mixing chamber; means for,j locking both said first and second plates in any desired independentJ position upon said damper plate; and means for moving said damper plate upon said face plate so as to control all of said openings simultaneously.

2. A gas burner comprising an yauxiliary air passage; a mixing chamber positioned within said air passage; a burner tip in communication with said mixing chamber; an air opening. surrounding said burner tip in connection with said air passage; and means for controlling the air supply to said air passage and said mixing chamber both independently and simultaneously.

3. A gas burner comprising an auxiliary air passage; a mixing chamber positioned within said air passage; a burner tip in communication with said mixing chamber; an air opening surrounding said burner tip in communication with said air passage; and means for controlling the air supply to said air passage and said mixing chamber bot-h independently and simultaneously, said means comprising a fixed plate having openings communicating with both said'passage and said chamber; a movable plate adapted to control all of said openings simultaneously, and adjustable plates carried `by said movable plate and adapted to control certain of said openings independently.

4. A gas burner comprising a base block of refractory Vmaterial having a tapered opening therethrough; anauxiliary air passage communicating with said opening; a mixing chamber; a burner tip positioned within said opening; a passage communicating between said mixing chamber and said burner tip;

l and a face plate supporting said mixing chamber within said auxiliary air passage, said face plate having air openings.

5. A gas burner comprising a base block of refractory material having a tapered opening therethrough;I an auxiliary air passage communicating with said opening; a mixing chamber; a burner tip positioned within said opening; a passage communicating between said mixing chamber and said burner tip; and a perforated face plate supporting said mixing chamber within said auxiliary air passage, and adjustable means for positioning said mixing chamber therein so as to control the position of said burner tip.

' 6. A gas burner comprising a base block of refractory material having atapered opening therethrough; an auxiliary passage communicating with said opening; a mixing chamber; a burner tip positioned within said opening, said burner tip having a tapered bottom; a cup-shapedinember adapted to receive said bottom and a passage communi-- eating between said cup-shaped member and said mixing chamber. y

In testimony whereof, I affix my signature.

GLENN L. HILEMAN.

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