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  Adjustable burnerUSPTO Application #: 20070054228Title: Adjustable burner Abstract: A burner suppliable with a mixture of air and fuel comprises a body of the burner provided with a diffuser in the surface of which openings are made for the exit of said mixture delivered into the body of the burner, a distributing device inserted inside said body of the burner, said distributing device comprises a regulating element provided with further openings for the transit of said mixture, said regulating element being movable within said body of the burner. The body of the burner can be subdivided into a plurality of sectors, each one of which is independently suppliable by the other sectors. (end of abstract) Agent: Nixon & Vanderhye, Pc - Arlington, VA, US Inventors: Giuseppe Fogliani, Wenzel Mach, Massimo Dotti, Massimo Gilioli, Stephanus Wijkmans USPTO Applicaton #: 20070054228 - Class: 431354000 (USPTO) Related Patent Categories: Combustion, Mixer And Flame Holder The Patent Description & Claims data below is from USPTO Patent Application 20070054228. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] The present invention relates to an adjustable burner, in other words a burner wherein the power supplied during operation can be varied within wide limits. [0002] In adjustable burners known from the prior art there is the problem that during operation at power noticeably below nominal maximum power the flames generated by combustion of the mixture of air and fuel conveyed to the burner tend to flatten out on the surface of the diffuser with consequent overheating of the diffuser. [0003] To overcome this drawback, in the prior art the diffuser of an adjustable burner is made from materials suitable for withstanding particularly high temperatures without getting damaged, which however has the consequence of significantly increasing the cost of the burner. [0004] Another problem that occurs in burners known from the prior art is unequal distribution of the flow of mixture of air and fuel at the outlet openings of the mixture that are made in the diffuser of the burner. In fact, the flow of mixture tends to be greater at the openings that are nearest the outlet of the Venturi tube and less at the openings that are more distant from the outlet. This gives rise to the risk of unstable flames and adjustment difficulties. [0005] In the prior art this drawback is remedied by providing the burner with a distributing element of the flow of mixture arranged inside the body of the burner and interposed between the Venturi tube and the body of the burner. This flow-distributing element is also provided with openings, generally distributed along its entire surface. The mixture that leaves the Venturi tube, before reaching the outlet openings made in the diffuser of the burner, must pass through the openings of the diffusing element. This causes redistribution of the flow of mixture, which is thus substantially uniform at the outlet openings. [0006] The distributing elements known from the prior art are connected to the body of the burner by means of welding and are positioned by means of an aligning pivot. Fixing by means of welding and positioning by means of an aligning pivot give rise to a noticeable increase of time and cost in producing the burner. [0007] The object of the present invention is to provide an adjustable burner in which the phenomenon of flattening of the flames on the diffuser is absent or at least greatly reduced in such a way as to make it possible to make the diffuser without using materials that are highly resistant to temperature. [0008] A further object of the present invention is to provide a burner in which there is a substantially uniform distribution of the flow of mixture at the outlet openings thereof that are made in the diffuser of the burner, achieving all this with moderate outlay of cost and time. [0009] According to the present invention a burner is provided that may be fed with a mixture of air and fuel, comprising a burner body provided with a diffuser in the surface of which openings are made for the exit of the mixture delivered into the body of the burner, distributing means for distributing the flow of mixture, said distributing means being inserted inside the body of the burner characterized in that the distributing means comprises a regulating element for regulating the flow of said mixture, said regulating element being provided with further openings for the transit of the mixture, said regulating element being movable inside the body of the burner. [0010] Owing to the fact that the regulating element is movable inside the body of the burner, it is possible to vary the reciprocal position of the openings made in the diffuser of the burner and of the further openings made in the body of the regulating element. This enables the overall section of the outlet placed at the disposal of the mixture to be varied in such a way that as the power supplied by the burner varies, i.e. as flow of mixture to the burner varies, it is possible to maintain an outflow speed of the mixture that prevents flattening on the diffuser of the burner of the flames produced by the combustion of the mixture. [0011] This condition can be maintained within a wide power range, for example between 20% and 100% of the nominal power of the burner. [0012] Owing to the invention it is thus possible to create an adjustable burner within a wide power range without having to resort to materials that are highly resistant to heat, thereby noticeably reducing manufacturing costs. [0013] According to a further aspect of the present invention, there is provided a burner that may be fed with a mixture of air and fuel, comprising a burner body provided with a diffuser in the surface of which openings are made for the exit of the mixture delivered into the body of the burner, distributing means inserted inside the body of the burner, said distributing means comprising a distributing element provided with further openings for the transit of the mixture, characterized in that the distributing element is connected to the body of the burner by means of mechanical interference fit. [0014] The mechanical interference fit between the distributing element and the body of the burner enables rapid, simple and cheap assembly of the burner, with noticeable time and production cost savings. [0015] According to a yet further aspect of the present invention there is provided a burner that may be fed with a mixture of air and fuel, comprising a burner body in the surface of which openings are made for the exit of the mixture delivered into the body, characterized in that the burner body is subdivided into a plurality of sections, each one of which may be fed independently of the others. [0016] The invention will now be disclosed by way of non-limiting example with reference to the attached drawings, in which: [0017] FIG. 1 is an elevation view of a burner according to the invention; [0018] FIG. 2 is the section II-II in FIG. 1; [0019] FIG. 3 is a partially fragmentary perspective view of a first version of a burner according to the invention; [0020] FIG. 4 is a view of the burner in FIG. 3, slightly rotated in relation to the view in FIG. 3; [0021] FIG. 5 is a schematic section of the burner in FIGS. 3 and 4; [0022] FIG. 6 is a plan view of a detail of the burner in FIGS. 3 to 5; [0023] FIG. 7. is a plan view of a first variation of the detail in FIG. 6; [0024] FIG. 8 is a plan view of a second variation of the detail in FIG. 6; Continue reading... Full patent description for Adjustable burner Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Adjustable burner patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Adjustable burner or other areas of interest. ### Previous Patent Application: Alternate combustion type regenerative radiant tube burner apparatus Next Patent Application: Furnace and degreasing method Industry Class: Combustion ### FreshPatents.com Support Thank you for viewing the Adjustable burner patent info. IP-related news and info Results in 0.29992 seconds Other interesting Feshpatents.com categories: Qualcomm , Schering-Plough , Schlumberger , Seagate , Siemens , Texas Instruments , |
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