A kind of gas flame steady burner
Technical field
The present invention relates to a kind of can both the retention flame under various environment burning, and when requiring a kind of fluid to mix with a kind of stable manner when, can be used as the gas flame steady burner of blender use with one other fluid.
Background technology
In many practical applications, people need a kind of desirable stabilizing burner, to guarantee in various wind outside providing stable combustion flame under the situation of wind-force even violent storm and extreme turbulent flow.These application comprise the Olympic Games or other sports meet torch, celebration fire spot and picnic fire.Yet regrettably, the simple stabilizer of this ideal and structure lacks at present relatively.In general, the retention flame reaches by using bluff body generation backflow or strong eddy flow to form vortex structure, though these methods are applied in the industrial combustion system and are successful, be difficult to be applied in the general daily life but hydrocyclone structure is complicated, all depend on relevant mobile direction and velocity magnitude with size and can simple bluff body produce backflow and produce its shape of back that refluxes.So these methods of having known all have tangible limitation.In order to break through the limitation of these conventional methods, promptly overcome the sensitiveness of corresponding stabilizer to outside flow direction, novel flameholder must produce a kind of backflow vortex structure, it be independent of on the one hand wind outside to, change insensitive to precipitate wind speed again on the other hand.
The key factor that influences flame stabilization is the spread speed of flame front, and this speed is fuel type, the function of air-fuel ratio and turbulivity.To most carbon compound fuel, typical laminar flame speed is below 0.5 meter per second.Although (average flow velocity is than the high magnitude of laminar flame speed) generation retention flame also is possible in turbulent flow, actual flame speed there still is confined to laminar flame speed.By contrast, weather in the blast brutality, instantaneous wind speed often surpasses 20 meter per seconds even reaches more than 100 meter per seconds, in this case, make flame stabilization, the present inventor thinks that its stabilizer need possess the function that can produce an aerodynamics " shielding ": this screening energy protection flame (or the root of flame) is not at least put out in all cases; And also has a low regime that can keep smooth combustion.
Summary of the invention
The purpose of this invention is to provide and a kind ofly do not put out in all cases, and have a gas flame steady burner that can keep the smooth combustion low regime.
For achieving the above object, the present invention takes following technical scheme: a kind of gas flame steady burner, it is characterized in that: it comprises the outer cup that a bottom surface is provided with down, one bottom surface is arranged on the interior cup in the described outer cup up, the bottom surface of cup is provided with the mixed airflow outlet in described, the cup cup circumferentially is provided with air inflow aperture in described, the vertical fuel jet nozzle that is provided with of bottom center of described outer cup, form a relatively independent cavity in described between the bottom of cup and outer cup, form a ring-type air duct between the described inside and outside cup.
The position that is provided with of described fuel jet nozzle is higher than described outer glass bottom surface, but is lower than described housing depth half.
Described air inflow aperture is arranged on edge or cup middle and upper part or the two combination at described interior cup top.
Described air inflow aperture by be arranged on be higher than on the wall of cup face in described in the supporting leg of cup end face form with the space that described outer glass bottom surface forms.
Described air inflow aperture be shaped as a kind of and more than one form fit in circle, circular arc, rectangle, zigzag, the waveform.
The outlet of described mixed airflow be arranged on described in a kind of and more than one positions between edge, central authorities, edge and the central authorities of cup bottom surface combine.
The outlet of described mixed airflow be shaped as circle, Long Circle, circular arc, annular, rectangle, triangle, a kind of and more than one shape combinations in cross.
The bottom shape of the described inside and outside cup that cooperatively interacts is a kind of and more than one combinations in plane, convex surface, the concave surface.
The sidewall cross sectional shape of the described inside and outside cup that cooperatively interacts is vertically, curves inwardly, a kind of and more than one cooperations in outwardly-bent, the trapezoidal inclination.
The shape of cross section of the described inside and outside cup that cooperatively interacts is rounded, oval, square, a kind of in the rectangle, triangle.
Described inside and outside cup axis direction be set to described in the bottom surface of cup be the end face that is higher than described outer cup, be lower than described outside glass end face, with described outside a kind of in concordant of glass end face.
The present invention is owing to take above technical scheme, and it has the following advantages: 1, the present invention is inverted the interior cup that is provided with a porous outside owing to be provided with an outer cup in the cup, makes between the inside and outside cup and has formed a cavity and an annular air channel; When burning takes place, after gaseous fuel enters cavity by jet nozzle, overwhelming majority flame occurs in top, cavity outside, and the flame in the cavity only accounts for a very little part, the oxygen material that the cavity internal combustion is required, then in entering cavity, air duct provides by extraneous air, therefore the flame of inside cavity can play the effect of the external firing that continues to ignite, thereby externally remaining main flame under the situation of environmental change impermanence does not extinguish, perhaps strictly speaking, keep whole flame not exclusively to extinguish.2, form the cavity of a shielding between the inside and outside cup of the present invention, therefore make stabilizer internal flow structure have autostability, in this case, local instantaneous velocity in the cavity under any circumstance all can be controlled in burning and extinguishes under the velocity amplitude of requirement, and then the flame of having avoided effectively lighting is blown out by swiftly flowing wind-force.3, the setting of cavity between the inside and outside cup of the present invention and air inflow aperture and mixed airflow outlet, make the interior air-flow of cavity form the stable backflow vortex of a relative closure, and then limited guaranteed that a kind of pattern can only be arranged in the cavity (if spiral structure is between two or more patterns " switching " in the cavity, can cause not existing at short notice the mechanism of the retention flame), make external flow direction of flame in the cavity have independence, thereby reduced the possibility that flame is extinguished widely.4, because geometry provided by the invention design can be controlled extraneous air and enter flowing in the cavity, make the mixing of air and fuel reach optimum state; Simultaneously because reasonable structural design, make the present invention have the path of igniting mutually of well inside and outside flame, this path both can make the external flame internal flame of igniting when being lighted for the first time, the also external flame that can make internal flame ignite and be put out, thereby guaranteed smooth combustion of the present invention effectively, and do not extinguished.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is the schematic top plan view of Fig. 1
Fig. 3 is a gas flow schematic diagram in the cavity of the present invention
Fig. 4 is the schematic top plan view of Fig. 3
Fig. 5 is the various air inflow aperture schematic diagrames of interior wall of cup face
Fig. 6 is the various mixed airflow outlet in an interior cup bottom surface schematic diagram
Fig. 7 is the inside and outside cup cross sectional representation that different shape cooperates
Fig. 8 is the inside and outside cup longitudinal section schematic diagram that different shape cooperates
Fig. 9 is with a kind of shape but the inside and outside cup of differing heights cooperates schematic diagram
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1 and Figure 2, the present invention includes cup 1, one outer cup 2 in, 1 end of interior cup, be upside down in the interior cup 1 in the outer cup 2 up, and two axis of symmetry of inside and outside cup 1,2 overlap, and interior cup 1 is fixed on outer cup 2 bottoms.Have several apertures as mixed airflow outlet 3 in 1 glass of bottom of interior cup, on the sidewall of interior cup 1 top, have the air inflow aperture 4 of several apertures as outside " secondary wind " near the cup limit.In form a relatively independent cavity 5 between the bottom of cup 1 and outer cup 2, formation one ring-type air duct 6 between interior cup 1 and outer glass 2 the sidewall.
As shown in Figure 3, Figure 4, cup 2 bottom center setting " wind " fuel jet nozzle 7 outside, gaseous fuel is by cup 1 bottom surfaces in jet nozzle 7 directives, because the barrier effect of interior cup 1 bottom wall, jet disperses peritropous mixed airflow outlet 3 to flow out.Fuel jet nozzle 7 the position is set, the bottom surface of cup in can being higher than, but should not be higher than half of cavity 5 height.The shape of fuel jet nozzle 7 can adopt, and long tube type, or orifice type (mouth of pipe sudden contraction is a very little outlet), or smooth reducing type, its shape of cross section and orientation should be consistent with cavity 5 cross sections (such as being circular, square, triangle etc.).The high speed drainage of jet nozzle 7 makes near the air inflow aperture 4 formation negative pressure that are positioned at cup 1 bottom, and then makes the air of outside flow through ring-type air duct 6 from air inflow aperture 4 suction cavitys 5.Enter the air stream of cavity 5 and the disturbance of jet generation, form a stronger eddy flow collar vortex, fuel gas is mixed at this mutually with air, the gas that a part is mixed adds fuel jet, final together via the mixed airflow outlet 3 outflow cavitys 5 of interior cup 1 bottom, form external flame with extraneous air mixed combustion.During igniting, outside combustion flame can ignite and be in the well-mixed gas of swirling flow collar vortex in the cavity 5.In case outside flame is influenced when extinguishing by fortuitous event such as high wind, the flame that is positioned at cavity 5 but is shielded in a space and can receive influences such as wind-force and extinguish, after in case ectocine is eliminated, the internal flame that the burns away outside combustion flame that can ignite conversely again, thus make integral body of the present invention be in stable fired state all the time.
As shown in Figure 5, in the present invention the air inflow aperture 4 of cup 1 sidewall the position is set and orifice shapes all can change, such as cup 1 cup top (as b, c, d, e, f among the figure) in air inflow aperture 4 both can be arranged on; Also can be arranged on the middle and upper part (as a, f among the figure) of interior cup 1 rim of a cup, the supporting leg 8 (c, d, e in as figure) of cup 1 end face in being higher than can also be set, the space composition air inflow aperture 4 that makes supporting leg 8 and form between cup 2 bottom surfaces outward on interior glass of 1 wall; Air inflow aperture 4 can also all be set (in as figure a) in interior cup 1 top and middle and lower part.The shape of air inflow aperture 4 both can be circular (as a, f among the figure), circular arc (as b, f among the figure), rectangle (as c, d, e among the figure), can also be zigzag, waveform etc., in a word, air inflow aperture 4 can be various, and it can realize that all air enters the purpose of cavity 5 from the bottom.
As shown in Figure 6, in the present invention the mixed airflow outlet 3 of cup 1 bottom surface the position is set and orifice shapes can be various, such as: cup 1 bottom surface central authorities (as a, b, c, h, i among the figure) in mixed airflow outlet 3 both can be arranged on, also can be arranged in the cup 1 bottom surface edge (as a, b, c, d, f, h, i among the figure), can also be arranged in the cup 1 bottom surface central authorities and edge between (as e, j among the figure).The shape of mixed airflow outlet 3 both can be (as a, b, c, e, f, h, i, the j among the figure) of circle, Long Circle, semicircle and annular, also can be rectangle, near rectangle, triangle and criss-cross (as h, a, d, e, i among the figure); Can also be cartoon pattern (as j among the figure); The mixed airflow of cup 1 bottom surface exports 3 shapes and the position is set and all can change in that is to say.
As shown in Figure 7, the shape of cross section of outer cup 2 of the present invention and interior cup 1 also can change,, rectangle rounded, oval, square such as whole shape of cross section, triangle (as a, b, c, d, e among the figure) etc.
As shown in Figure 8, the vertical sectional shape of the inside and outside cup 1,2 of the present invention also can change, such as: inside and outside cup 1,2 bottoms all are plane (as a, d among the figure) or arc surface (as b among the figure); For another example: outer cup 2 bottom surfaces are arc surface or plane, and interior cup 1 is plane or arc surface (as b, f among the figure); The bottom surface of inside and outside in addition cup 1,2 also can respectively or have only one of them to concave, and the bottom shape between the inside and outside cup can make up arbitrarily.The cross sectional shape of the sidewall of inside and outside cup 1,2 also can change, such as: sidewall both can be vertical (as a, e, f among the figure), also can be inside or bandy (as b, c, d, f among the figure), can also be two trapezoidal combinations (as e among the figure), the shape of inside and outside in a word cup 1,2 and the cooperation of different shape all can change.
As shown in Figure 9, the present invention with a kind of inside and outside cup 1,2 of shape in (a, b, c in as figure), the axis height of inside and outside cup 1,2 is (as d, e, the f among the figure) that can change, such as: interior cup 1 is than outer cup low (as d among the figure), again such as: interior cup 1 is than outer cup 2 height (as e among the figure), inside and outside cup 1,2 equally high (as f among the figure), but cup 1 is slightly higher for good than outer cup 2 in general.
In sum, the various collocation of inside and outside cup 1,2 can make the present invention can produce various products as required, to cooperate various burner, play the effect of abundant mixing air and gas combustion, play effect of smooth combustion or the like.The present invention can be used to comprise the Olympic Games or other sports meet torch, in celebration fire spot and the picnic fire.