US2855987A - Liquid butane or propane vaporizing burner - Google Patents

Description

Oct;` 14, 1958 R. L. 'ISCHYLANDER LIQUID BUTANE ORPROPANE VAPORIIZING BURNER 2 Sheets-Shea?l 1 Filed .my 1e, 195e www " OcLM, 1958 l yR. L. sc:HYl..Al\n-`JERv 25855987 v LIQUID BUTANEOR PROPANE VAPQRIZINGl BURNER v Filed July 1s, 1956 2 sheets-sheet 2 .f r n ma m ,w s. L w u w 0 7 .a

Unite States Paf 2,855,987 LIQUID BUTANE R PROPANE VPORIZING BURNER Rune L. Schylander, Hackettstown, N. J.

Application July 16, 1956, Serial No. 598,171 4 claims. (c1. 15s- 53) l This invention relates to improvements in liquefied gas fuel vaporizing burners, and has reference, more particularly, to burners adapted to use liqueed butane or pro pane gas, commonly referred to as bottle gas, as a fuel.

This invention'k has for an object to provide a burner comprising an endwise open burner head which defines a combustion chamber, said head including a vaporizing chamber which surrounds said combustion chamber, a conduit being provided for delivering liquefied gasto the vaporizingV chamber, a second conduit being provided for discharging the vaporized liquid or gas from the vaporizing chamber, a third conduit being provided` for delivering the vaporized liquid or gas into the combustion chamber of the burner head, and a manipulatable regulating valve being disposed between said gas discharge conduit and said gas delivery conduit, whereby the vapor pressure and quantity of gas delivered into the combustion chamber of the burner head can be easily and quickly controlled, according to the heat output desired to be produced by the burner in use. Y

The invention has for a further object to provide a novel relationship of the liqueed gas delivery conduit, the vaporized liquid or gas discharge conduit and the gas delivery conduit, whereby the first two mentioned conduits are enclosed within the last mentioned conduit; said conduits, thus related, extendingbetweena distributor block anda regulating valve block, the former being affixed to and diametrically across the rear end ofthe burner head; such arrangement not only provides a simple and compact rigid structure without exposed passage forming parts, but advantageously permits the use of small diameter, thin wall tubing for the first `two mentioned conduits' disposed to be wholly enclosed within a thick wall rigid`\pipe for the last. mentionedconduit, thus assuring effective protection of the former against damage; such arrangement also permits .usevtof aconduit assembly of any desired length, which is of lespecial fadvantage in burners of the portable or torch type, since such assembly serves therein as a handle means by which the burner lcan be conveniently manipulated in use.

Another object of the invention is to provide a 4liquefied butane or propane vaporizing burner wherein the above referred to novel features of construction can readily be embodied in either a portable or` torch type or a stationary or fixed type of burner.

The above and other obects will be understood from a reading of the following description of rillustrativeembodiments of this invention in connection with theaccompanying drawings thereof, in which: K p

Fig. 1 is a longitudinal sectionalview of a burner `of the portable or torch type embodying the novel features of this invention, parts being shownin elevation; Fig. 2 is an end elevation thereof, viewed from the'left in Fig.

' duced diameter.

t p p 2,855,987 if@ patented' Oct. 14, 195s Fig. 6 is a longitudinal sectional view of a burner of the stationary or fixed type embodying the novel features of this invention, with parts shown in elevation; 4and Fig. 7 is a fragmentary end elevation of the same, viewed from the right in Fig. 6.

Like characters of reference are employed in the above described views of the drawings to indicate corresponding parts.

Referring first to Figs. 1 to 5 inclusive of the drawings, which illustrate a burner vof the portable or torch type embodying my invention, the reference character 10 indicates a burner head comprising an endwise open tubular body 11 of suitable length and diametric size, the interior of which provides a combustion chamber 12. Within the rearward portion of the body 11, concentric to the wall thereof, is a tubular shell 13 of suitable length and re- Said shell defines an intermediate annular vaporizing chamber 14, which is closed at its respective ends by end rings 15 interposed between the same and the wall of the body 11. This vaporizing chamber surrounds the combustion chamber 12, so that heat from the latter is transmitted thereto. Axed to and diametrically across the rearward end of the burner head 10 is a metallic distributor block 16, that is of such width as to define, in conjunction with the rearward open end of the combustion chamber 12, air admission ports 17 bordering opposite sides of the distributor block.

Extending -axially rearward from the distributor block 16 is a conduit assembly 18, which will subsequently herein be more fully described. This conduit` assembly can be of selected length so that it is well adapted for use as a handle means for manipulating the burner when ofthe portable or torch type.

Afixed to the outer or rearward end of the conduit assembly 18 is a metallic regulating valve block 19, which also includes means to deliver to the burner a liquefied gas such as butane or propane from a suitable supply l; Fig. 3 is a crossfsectional view, Vtakenon linel 3 3 in lon line 5--5`in Fig.V 1, but drawn on anfenlarged'scale,

source thereof.

The conduit assembly 18 comprises an externalrigid tubular conduit or pipe 20 of relatively large diameter, the opposite ends of which are welded gas tight respectively to the distributor block 16 and to the regulating valve block 19. Extending through the interior of said external conduit or pipe 20 is a liquefied gas delivery conduit 21 comprising metallic tubing of relatively small diameter, one end of which is `suitably affixed to the regulating valve block 19 and the other end thereof to the distributor block 16. Also extending through the interior of the external conduit or pipe 20 is a vapor or gas discharge conduit 22, which likewise comprises metallic tubing of relatively small diameter, one end of which is suitably affixed to the distributor block 16 and the other end thereof to the regulating valve block 19.

Coupled to the regulating valve block 19 is a liquefied gas supply pipe or hose 23, which leads from a suitable source of supply of said liquefied gas (not shown). Said supply pipe or hose 23 preferably includes, in the line thereof and adjacent to the regulating valve block 19, a manipulatable shut-off valve 24. The regulating valve block is provided with an intake chamber 25 with which the supply pipe or hose 23 communicates, and extending through the body of said block 19 from this intake charnber to the receiving end of the liquefied gas delivery conduit 21 is a communicating duct 26. The liquefied gas is delivered through the lconduit 21 to the distribution isa vapor or gas outlet duct 28 which communicates with the receiving end of the discharge conduit 22. Extending into the body of the regulating valve block 19, from the outlet end of the vapor or gas discharge conduit 22, is a duct 29 which communicates with a valve chamber 30 with which said block 19 is provided. Mounted 1n connection with the block 19, for cooperation with its valve chamber 30, is a manipulatable vapor or gas regulating valve 31. Said valve 31 is provided with a needle valve 32 which is opposed to the duct 29, theroppose'dend of the latter providing a valve seat with which said needle valve 32 cooperates. The block 19 is also provided with a vapor or gas delivery duct 33 which communicates at its inner end with the valve chamber 30, and at its outer end with the rearward end of the bore of the external conduit or pipe 20 of the conduit assembly 18, whereby to receive vapor or gas metered by the regulating valve 31. The forward end of the bore 34 of the conduit or pipe 2t) communicates with a vapor or gas delivery duct 35 with which the distributor block 16 is provided. Mounted on the inner side of the distributor block 16 is a burner nozzle 36having a vapor or gas orifice 37 through which the delivered vapor or gas is discharged into the rear end of the combustion chamber 12 of the burner head 10, to be therein mixed with air inliowing through the air admission ports 17, whereby to produce a combustible fuel mixture adapted to be ignited at the outer or forward end of the burner head 10, when the burner is in use.

In the operation of the burner, the liquefied gas delivered to the vaporizing chamber 14 is subjected to the heat generated by the burner in use, and is quickly vaporized so as to produce a combustible vapor or gas. The vapor or gas, thus produced, is discharged from the vaporizing chamber 14 through the conduit 22 to the valve chamber 30 of the valve block 19, and, subject to the regulating or metering eifect of the manually adjusted needle valve 32, passes through the duct 33, and thence through the bore 34 of the external conduit or pipe 2t) to the combustion chamber 12 of the burnerhead. Adjustment of the needle valve 32 very precisely controls the vapor pressure and quantity of combustible vapor or gas delivered to the burner head, so that the B. t. u. rating of the burner can be varied at will to selectively deliver, in operation, from to 1,000,000 or more B. t. u. per hour.

The unique construction provided by the described conduit assembly 18, permits `the use of relatively fragile tubing for the liquefied gas delivery and vapor or gas discharge conduits 21 and 22, since these conduits, being 'l` enclosed within the external rigid conduit or pipe 20, are protectively shielded by the latter against hazard of injury.

Referring now to Figs. 6 and 7 of the drawings, these views show a modified form of the burner which nevertheless embodies the novel features of my invention. This modified form of the burner is adapted for stationary installation in connection with and attachment to a furnace or other heat applying structure. There isno radical difference in the construction between that of such stationary or fixed type of burner and that'of the portable or torch type above described, lexcept as to the arrangement of the distributor block, the regulating valve block and the conduit assembly therebetween, so that said conduit assembly can extend angularly relative to the burner head 10, and from an end of the distributor block instead of from a side thereof.

In Figs. 6 and 7 the distributor block is indicated by the reference character 166 and the regulating valve block by the reference character 190. The conduit assembly extending between the distributor block 160 and the regulating valve block 19t) is indicated by the reference character 180, and corresponds in detail construction to the conduit assembly 18 of Fig. l. Instead of connecting with a mid-portion of a distributor block as in Fig. l, the conduit assembly 180 is connected to an end of the distributor block 160. ,The distributor block is provided with a gas intake duct 280, which is angularly shaped to extend from the gas delivery conduit 21 of the conduit assembly to the vaporizing chamber 14; with a gas outlet duct 270 angularly shaped to lead from the vaporizing chamber 14 to the gas discharge conduit 22 of the conduit assembly 180; and with a gas delivery duct 35) angularly shaped to lead from the bore 34 of the conduit assembly 180 through the burner nozzle 36 into the combustion chamber 12.

I claim:

l. A liquefied butane or propane gas vaporizing burner comprising an endwise open tubular burner head adapted to provide a combustion chamber and including an annular vaporizing chamber surrounding said combustion chamber, a distributor block attached to the rear end of said burner head to extend diametrically across the same, whereby to provide atmospheric air `admission ports bordering opposite sides thereof to enter the rear end of said combustion chamber, a rigid rectilinear conduit assembly extending from said distributor block, a regulating valve block at which said conduit assembly terminates, said regulating valve block having means through which liquetied gas fuel is supplied, said conduit assembly providing parallel separated passages, one to conduct liquefied gas fuel from the supply means to the vaporizing chamber, another to conduct gas from the vaporizing chamber to the regulating valve block, and a third to conduct gas from the latter block to the combustion chamber of the burner head, manipulatable gas regulating valve means connected with said regulating valve block and operative between the last two mentioned passages, and said distributor block having ducts respectively interconnecting the liquefled gas passage of the conduit assembly with the Vaporizing chamber, another to discharge gas from the vaporizing chamber through the gas regulating valve means to the passage which conducts gas to the combustion chamber of the burner head, and a third to discharge gas from the latter passage into said combustion chamber.

2. A liquefied butane or propane gas vaporizing burner according to claim l, wherein the conduit assembly comprises an external rigid comparatively thick walled pipe, the bore of which provides the passage through which gas is delivered to the combustion chamber of the burner head, and respective comparatively thin walled tubular conduits disposed to extend wholly within and through4 the bore of said external pipe, one to provide the passage through which liqueed gas is delivered to the vaporizing chamber of the burner head, and another to provide the passage for discharging gas from said vaporizing chamber.

3. A liqueed butane or'propane gas vaporizing burner comprising an endwise open tubular burner head adapted to provide a combustion chamber and including therewithin a separate annular vaporizing chamber surrounding said combustion chamber, a distributor block attached to the rear end of said burner head to extend diametrically across the same whereby to provide atmospheric air admission ports bordering opposite sides thereof to enter the rear end of said combustion chamber, a rigid rectilinear conduit assembly extending from said distributor block, a regulating valve block at which said conduit assembly terminates, said regulating valve block having a duct through which liquefied gas fuel is supplied, said conduit assembly providing parallel separated passages, one passage to conduct liquefied gas fuel from said duct to the vaporizing chamber, another passage to conduct gas from the vaporizing chamber to the regulating valve block, and a third passage to conduct gas from the latter block to the combustion chamber of the burner head, said regulating valve block having a valve chamber and a second duct leading from the passage which conducts gas from the vaporizing chamber into said valve chamber, said regulating valve block having a third duct leading from said valve chamber to the passage which conducts gas to the combustion chamber of the burner head, a manipulatable needle valve mounted on said valve block in connection with said valve chamber and adapted to cooperate with the outlet of said second mentioned duct, whereby to control the vapor pressure and quantity of gas delivered through said third mentioned duct, and ysaid distributor block having a plurality of ducts, one disposed to connect the liqueiied gas passage of the conduit assembly with the vaporizing chamber, another to discharge gas from the vaporizing chamber to the passage leading to the regulating valve block, anda third to discharge gas from the passage leading from the latter block into the combustion chamber.

4. A liquefied butane vor propane gas vaporizing burner according to claim 3, wherein the conduit assembly comprises an external comparatively thick walled rigid pipe, the bore of which provides the passage through which gas is delivered to the combustion chamber of the burner head, and respective comparatively thin Walled tubular conduits disposed to extend wholly Within and through the bore of said external pipe, one to provide the passage through Which liquefied gas is delivered to the vaporizing chamber of the burner head, and another to provide the passage for discharging gas from said vaporizing chamber.

References Cited in the le of this patent UNITED STATES PATENTS 613,586 Mitchell Nov. l, 1898 666,685 Neuendort Ian. 29, 1901 955,946 Conrad Apr. 26, 1910

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