| Gas burner equipped with a cooling system -> Monitor Keywords |
|
|
  Gas burner equipped with a cooling systemUSPTO Application #: 20060292506Title: Gas burner equipped with a cooling system Abstract: A gas burner (10) equipped with a cooling system, featuring whatever configuration and size, includes a flange (12) with a central hole (14), an intermediate body or underhead (16) coupled with the mentioned flange, a distribution plate (18), if any, with slots (28) and a head (20) equipped with a multiplicity of clearance holes (22); the underhead (16) includes a base (48) forming a separation plate between the upper front that faces the head (20), on which a plurality of ribs (26) developing from the base itself (48) and coming into contact with the distribution plate (18) or the head (20) is found, and the opposed lower front equipped with an articulated canalization where the cooling fluid circulates. (end of abstract)
Agent: Bucknam And Archer - Roslyn, NY, US Inventors: Giuseppe Pozzan, Giuseppe Dalla Vecchia USPTO Applicaton #: 20060292506 - Class: 431160000 (USPTO) Related Patent Categories: Combustion, Fuel Disperser Installed In Furnace, Disperser Cooled By Fluid Additional To Furnace Feed The Patent Description & Claims data below is from USPTO Patent Application 20060292506. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] This invention refers to a gas burner equipped with a cooling system. More specifically, this invention refers to a gas burner that is preferentially and not restrictively, of the pre-mixed type, of whatever configuration and development, equipped with means that are capable of cooling its surface next to the flame retention area. [0002] There are, as already known, gas burners that typically consist of a combustion head lodging in a combustion chamber; on the head surface, otherwise called flame retention surface, a flame front stabilizes, which brings to combustion the mixture fed through the inner flues of the burner. This type of burners produces significant troubles, which are mainly due to the fairly high operating temperature values. [0003] Especially in cases when the burner head comes directly into contact with the area where the combustion of the gas mix occurs, the surface temperatures as well as those reached by the materials that make up the burner are high; the flame front reaches temperatures ranging around 1800-2000.degree. C. and even higher as a function of the combustible gas being used and the surface of the burner, which stabilizes the flame front next to the surface itself, overheats accordingly. The burner head in typical conditions of use may reach temperatures ranging between 900 and 1100.degree. C., especially in conditions of forced power modulation when low mixture flow rates cause a further approach of the flame front to the burner surface. [0004] Considering that the burners at issue are not typically equipped with an own cooling system, it is therefore necessary to allow the various parts of the burner to be manufactured from sophisticated materials that are capable of resisting the high operating temperature values; this sometimes brings about problems in connection with the processing of such materials, besides high production costs. [0005] A further trouble normally found in known burners concerns the highly polluting emissions, considering that the formation of nitric oxides in combustible gases is directly linked with the flame front temperature, and it reduces proportionally to the extent that a relatively cold flame front can be stabilized. In an attempt to remedy this problem and reduce temperature, besides air and gas premixing, the very surface of the burner head is used, which on one hand takes heat away in contact with the flame front, but on the other hand gets overheated. It follows that the burner surface is often exposed to erosion by high temperature oxidation, as well as to significant mechanical stresses which progressively debilitate the whole equipment and lead it to breaks due to thermal fatigue. In an attempt to reduce such risks, even in these cases, special materials that withstand high temperatures are used, such as, for instance, metal plates or fibres made from super-alloys with a high content of chromium or aluminium, or fibres or tiles from ceramic materials. However, even these solutions are subject to thermal and mechanical stress which, in the long run, is likely to modify intactness or strength, and hence prejudice a proper operation of the equipment as a whole. Moreover, these special materials are very expensive, and this significantly affects overall production costs. [0006] Furthermore, known burners are typically located on a front flange that closes the combustion chamber, and even such flange needs to be manufactured from high-temperature resistant materials, along with the electric cables that feed the ignition electrodes contained inside; even these requirements lead to an increase in production costs, whereas the loss of heat from the flange may entail, if excessive, insulation problems by the external walls of the unit and operating failures of the most temperature-sensitive parts, such as, for instance, burner management electronic boards. [0007] A further inconvenience that is found in known burners is the emission of loud sound vibration owing to the different temperature conditions at which the burner operates, typically when the flame retention area is at much higher temperatures in minimum power conditions. To remedy such inconvenience, additional mixture feed circuit silencers are generally used, even though they involve constructional complications, increased costs and do not always completely solve the problem. [0008] The object of this invention is to remedy the above-described inconveniences. [0009] More specifically, the object of this invention is the provision of a gas burner, preferably through not critically of the pre-mixed type, which is capable of easily withstand the high working temperatures under all circumstances, even when the burner head comes directly into contact with the area where the gas mixture combustion takes place. A further object of this invention is the provision of a gas burner that does not require, for high-temperature, the use of sophisticated and expensive materials. [0010] Not least among the objects is the provision of a burner as described above which is able to crucially polluting emissions during operation, without resorting to heat exchanges taking place on the burner head, nor resorting to special material to manufacture its components or their parts. [0011] A further object of the invention is the provision of a gas burner which is in a position to avoid, or at least dramatically reduce, during operation, the emission of sound vibration or noise at all, without however entailing the use of additional silencers means. [0012] A further object of the invention is the provision of a gas burner, e.g. a premixed-type one, which can guarantee high resistance and reliability over time, and also such as to allow for an easy and cheap manufacture. [0013] These and other objects are achieved by the gas burner of this invention, such as, for instance, the pre-mixed type one, equipped with a cooling system, of whatever configuration and size, which includes a flange with a central hole, an intermediate body or underhead coupled with the mentioned flange, a distribution plate with slots, if any, and a head equipped with several clearance holes, and which is mainly characterized in that the underhead includes a base forming a separation plate between the upper front that faces the head, on which a plurality of ribs developing from the base itself and coming into contact with the distribution plate or the head is found, and the and the opposed lower front equipped with an articulated canalisation where the cooling fluid circulates. [0014] The constructional and functional characteristics of the gas burner of this invention can be readily discerned from the following description, wherein reference is made to the accompanying figures illustrating a preferential embodiment, which does not limit the invention to the precise forms disclosed, and wherein: [0015] FIG. 1 is a schematic exploded view of the gas burner of this invention; [0016] FIG. 2 is a schematic exploded view of the same burner, as seen from a side opposite to that of FIG. 1; [0017] FIG. 3 is a perspective schematic view of a part, namely the underhead, of the burner of this invention; [0018] FIG. 4 is a perspective schematic view of a burner according to the invention, in association with a heat exchanger; [0019] FIG. 5 is, in a perspective schematic view, an alternative embodiment to that of FIG. 4. [0020] With reference to the mentioned figures, the gas burner of this invention, e.g. a pre-mixed type gas burner, referenced as a whole with no. 10 in FIG. 1, includes, illustratively and not restrictively in character, a configuration with a circular base and a basically flat development and, according to the preferential embodiment illustrated in the diagrams, it incorporates a flange 12 equipped with a hole 14 for feeding the gas mixture, an intermediate body or underhead 16 coupled with the mentioned flange, a distribution plate 18, if any, meant to distribute the mixture in a uniform manner, and a head 20 on which the flame retention area is found; the head 20 is typically provided with several holes or slots 22 or clearance holes of whatever shape, obtained for instance by shearing on one or more metal plates that are coupled with one another in a known manner. The underhead 16 is equipped with ribs 26 arranged, for instance, in a radial pattern, which are advantageously obtained integrally with the underhead itself and serving the purpose indicated hereinafter. [0021] The distribution plate 18 is equipped with slots 28 which, from its perimeter, meet towards the central area, and with holes 29 allowing the gas mixture to pass. Both the flange 12 and the underhead 16 are equipped with peripheral tailpieces 30 with holes 32 for mutual connection and stable bond through bolts or equivalent retaining means. [0022] The head 20 and the distribution plate 18 are fastened to the upper exposed front of the underhead 16 by means of screws or equivalent means (not illustrated) which engage in holes 24 in the ribs 26 and pass through the head 20 and the plate 18 properly drilled. [0023] On the upper front turned towards the mentioned plate 18, the underhead 16 is provided with a circumferential rib 34 that is slightly embossed, whose inner diameter mainly matches that of the head 20 and of the distribution plate 18; the ribs 26 on which the holes 24 are made mainly depart from the inner band of the circumferential rib 34. [0024] The gas mixture that is fed through hole 14 of flange 12 and through a corresponding aligned opening 38 made on the underhead 16 flows in the sectors lying between the ribs 26, referenced with no. 36 in FIG. 1. Continue reading... Full patent description for Gas burner equipped with a cooling system Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Gas burner equipped with a cooling system 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 Gas burner equipped with a cooling system or other areas of interest. ### Previous Patent Application: System for controlling the delivery of a fuel gas to a burner apparatus Next Patent Application: Transparent candle and method of making Industry Class: Combustion ### FreshPatents.com Support Thank you for viewing the Gas burner equipped with a cooling system patent info. IP-related news and info Results in 2.85916 seconds Other interesting Feshpatents.com categories: Daimler Chrysler , DirecTV , Exxonmobil Chemical Company , Goodyear , Intel , Kyocera Wireless , |
||
