US2776706A - Mixing and turbulence producing means for a gas burner tip - Google Patents

Description

L. H. DRAKE 2,776,706

MIXING AND TURBULENCE PRODUCING MEANS FOR A GAS BURNER TIP Jan. 8, 1957 Filed Oct. 9, 1953 IN V EN TOR.

Arro/m EY /4 455 H. DRAKE Ting United States Patent MIXING AND TURBULENCE PRODUCING MEANS FOR A GAS BURNER TIP Lee H. Drake, Columbus, Ohio Application October 9, 1953, Serial No. 385,061 1 Claim. (Cl. 158118) This invention relates to improvements in gas burners and is especially, though not exclusively, designed for use in association with natural gas burning tips or jets.

A primary object of this invention is to provide a better performing and longer and larger flame by controlling the admixture of air and gas at the exit of the gas from a burner tip.

A further object of this invention is to provide a novel means for admitting and regulating air around the burner tip, the means including a unit that fits on the burner tip and encompasses it in such a manner as to completely control the admixture of air with the gas issuing therefrom.

Another object of this invention is to provide a nozzle for the burner tip, the nozzle having an air admitting hood surrounding its end which is axially spaced from the tip and is formed with corrugated dependent strips and intermediate axially extending open portions.

These and ancillary objects are attained by this invention, the preferred embodiments of which are set forth in the following description and illustrated in the accompanying drawing, wherein:

Figure 1 is a side elevational View, partly in section of the mixing and turbulating means, constructed in accordance with this invention;

Figure 2 is a top plan view thereof;

Figure 3 is a cross-sectional view taken on line 3-3 of Figure 1;

Figure 4 is a vertical sectional view;

Figure 5 is a similar vertical sectional view illustrating a modified form of corrugated strip, and,

Figure 6 is a perspective view of the lower mounted end of one of the corrugated strips.

Referring now more particularly to the accompanying drawing, the numeral 10 designates a gas conduit, of any conventional type, which terminates in a tip 12, that controls the flow of gas, preferably natural gas, from the conduit. The tip 12 is selected for the size of its centrally disposed passage 12a to provide the desired gas flow.

A flat plate 14 is formed with a center opening 16 which receives the tip 12 so as to seat the plate 14 on the tip with the plate radially projecting from the tip.

A frusto-conical, hexagonal hood 18 is mounted adjustably on the side 20 of the plate and projects outwardly from said side. Preferably, the hood ups-tands from the plate, which is disposed in a horizontal plane. The hood has its major open end 22 mounted on the side 20, by means of angle brackets 24 having upstanding, inwardly inclined, apertured flanges 26 to receive supporting pins 28. In this fashion, the hood 18 can be moved relative to the plate 14 to control the admission of air to the tip 12.

The open minor end 30 of the hood 18 is circumposed on a hexagonal tubular member or nozzle 32 and is axially slidable thereon in conformance with the positioning of the major end 22 relative to .the plate. Thus, the hood completely encloses the adjoining ends of the nozzle 32 and tip 12 and is adjustable to admit air between its major end and the plate.

The nozzle 32 has its lower end portion formed with three axially extending, as indicated in Figure 3, openings 34, 36 and 38 inwardly of the minor end 38 of the hood. The nozzle has its side walls cut out below or inwardly of the minor end of the hood to provide the openings 34,

36, and 38. Intermediate the openings 34, 36, and 38, the nozzle has transversely corrugated dependent strips 40, 42 and 44 which terminate in lateral mounting flanges 46 that are fixedly superimposed by fasteners 48 on the side 20 of the plate. The strips 40, 42 and 44 are undulatingly corrugated, a-sshown in Figure 4, and are equidistantly spaced apart in angular relation.

If desired, the strips may be outwardly bowed, as is the strip 40a in Figure 5, though such form is not. necessary but does provide :a hotter flame of more stability. The outward strip 40a is easily obtained by merely bending it outwardly before fastening it to the plate.

The tube or nozzle 32 is preferably formed from brass or copper and the hood 18, which is axially adjustable thereon to regulate the air intake at 50, is preferably formed from sheet steel. The base or plate 14, which supports the entire unit, is preferably formed from sheet steel.

In use, the tip 12 is selected so that its exit orifice permits the desired amount of natural gas to issue from the conduit 10. The corrugated strips 40, 42 and 44 of the tube 32 are housed within the hood 18, which is axially adjusted to control the size of the air intake 50. These strips are the important factors since the performance of the burner dependsupon the corrugations, transverse of the axis of the strips, which have interposed axially extending openings.

With the hood properly adjusted, the air enters the air intake and mixes with the ignited gas, the corrugations producing a tu-rbulanm in such mixture, and a light blue inner tip of flame, which is surrounded by a much larger and longer flame of dark purple streaked with orange, issues from the nozzle 32. The flame heats metal to a very high red in a very short time at a temperature of about 1100 F. I have found that with the flame at such a temperature four inches beyond the nozzle 32, the nozzle never goes above F., due to the cooling air surrounding it, inwardly of the hood.

While the best known form of the invention has been disclosed herein, other forms may be realized so that limitation is sought only in accordance with the invention as defined in the appended claim.

What I claim is':

A device of the character described comprising a burner fuel supply tip having a fuel supply passage extending upwardly therethrough, a horizontal flat circular plate concentrically mounted and extending from the sides of said tip, a vertically extending tubular member forming a burner nozzle, a plurality of circumferentially spaced vertically dependent strips afiixed to the lower end of said tubular member, an outwardly ext-ending flange formed at the lower end of each strip, said flange aflixed to said plate in circumferential relationship to said tip, a plurality of upstanding brackets mounted upon said plate, and a hood having a relatively small upper end slidable upon said tubular member and a relatively large lower end, and means for vertically adjustably mounting the lower end of the hood upon said brackets, said strips being transvers-ely corrugated.

References Cited in the file of this patent UNITED STATES PATENTS 593,364 Moore Nov. 9, 1897 1,217,551 Armor Feb. 27, 1917 1,572,833 Baker Feb. 9, 1926 1,818,471 Geauque Aug. 11, 1931 1,961,572 Roth June 5, 1934 2,118,741 Smith et al. May 24, 1938 FOREIGN PATENTS 200,974 Ger-many Aug. 3, 1908 643,374 France May 15, 1928

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