CN201203120Y - Injection structure of multiple-jet flow gas burner - Google Patents

Abstract

The utility model relates to an injection structure of a multi-jet fuel gas burner, which comprises nozzles and a venturi tube and is characterized in that the gas inlet of the venturi tube is fitted with at least two nozzles with a jet hole, or fitted with one nozzle with at least two jet holes, or fitted with at least one nozzle with one jet hole and at least one nozzle with at least two jet holes. The injection structure of the utility model has the advantages of strong injection capacity and favorable mixing effect. The burner with the injection structure has the advantages of strong injection capacity, favorable mixing effect, large heat load, high combustion efficiency and less emission amount, and is especially suitable for a domestic gas range.

Description

A kind of ejection structure of multi-jet flow gas combustion burner

Technical field

The utility model relates in the burner that household gas range is used, particularly multi-jet flow gas combustion burner cooperation by nozzle and Venturi tube to suck primary air and to make air and combustion gas is able to well-mixed ejection structure.

Background technology

Ejection structure is the important component part of gas burner, ejection structure is made of Venturi tube and the nozzle that is configured in the Venturi tube air inlet usually, combustion gas sprays into Venturi tube through nozzle, under the Venturi tube effect effect, simultaneously primary air is sucked Venturi tube and part mixing therein.

Existing traditional gas burner all is the corresponding Venturi tubes of a nozzle, just has only one fuel gas flow in a Venturi tube, and present most burner only is provided with two ejection structures, promptly bear the air feed load of whole outer ring fire by a nozzle and a corresponding outer Venturi tube, the air feed load of ring fire in a nozzle and a corresponding inner venturi tube are born, so the especially required primary air amount of its gas quantity is difficult to raising in essence, thereby thermic load is relatively low, difficult satisfy Chinese family particularly Chinese family to the needs of quick-fried.

The burner that one class has a plurality of ejection structures has also appearred in recent years, the burner that promptly has the multiinjector multiple venturi tube, it adopts vertical Venturi tube mostly, wherein, the air feed load of ring fire in a nozzle and a corresponding Venturi tube are born, the air feed load of outer ring fire is then born by a plurality of nozzles and Duo Gen Venturi tube, but still one-to-one relationship between Venturi tube and the nozzle, that is to say, the only corresponding nozzle of Venturi tube, the also only corresponding Venturi tube of nozzle.The type burner increases on thermic load, but still has deficiency at aspects such as ejector capacity, efficiency of combustion and fume emissions.

The utility model content

Technical problem underlying to be solved in the utility model is to provide a kind of ejection structure with jet-flow more than two strands or two strands at the prior art present situation, to improve ejector capacity, mixed effect, the efficiency of combustion that has burner now and to reduce fume emission.

The ejection structure of the utility model multi-jet flow gas combustion burner, it comprises nozzle and Venturi tube, the air inlet that it is characterized in that described Venturi tube disposes the nozzle of establishing a spray orifice at least on two, perhaps dispose the nozzle of establishing at least two spray orifices on one, perhaps dispose the nozzle of establishing a spray orifice at least one and the nozzle of establishing at least two spray orifices at least one.In brief, that is to say, dispose the jet-flow more than two strands or two strands in the Venturi tube of the utility model ejection structure.

Common situation is, a burner has two or more ejection structures, one be and interior ring fire corresponding in ejection structure, all the other be and outer ring fire outer ejection structure accordingly.When specifically the utility model ejection structure being applied to burner, ring fire and outer ring fire also can only be applied to outer ring fire in both it can being applied to simultaneously.

Be ejector capacity, mixed effect, efficiency of combustion and the reduction fume emission that improves burner, the preferred mode of the utility model ejection structure has two: the axis of a spray orifice in the described spray orifice of the first and the central lines of described Venturi tube, and the axes intersect of all the other spray orifices is on the center line of described Venturi tube, and the angle of cut of the center line of the axis of spray orifice and Venturi tube is 2.5～15 °.It two is that the axis of described spray orifice all intersects on the center line of described Venturi tube, and the angle of cut of the center line of the axis of spray orifice and Venturi tube is 2.5～15 °.And the further preferred down angle of cut of these two kinds of optimal ways is 3.5 °.

As for the crossing mode of the center line of the axis of spray orifice and Venturi tube, both can be that the axis of all spray orifices all intersects at the same point on the Venturi tube center line, also can stagger to some extent, but be excellent to intersect at same point.And the spray orifice that all axis and Venturi tube center line intersect is preferably with respect to the center line symmetry of Venturi tube, the even layout.

As for the direction that is provided with of Venturi tube, the utility model has no particular limits, and both can be to be vertical Venturi tube, also can be horizontal Venturi tube, or even is vertical Venturi tube partly, and the Venturi tube of part for being in tilted layout, or the like.

For the Venturi tube that disposes the jet-flow more than two strands or two strands, the pairing spray orifice number of Venturi tube is advisable with 2～10, is preferably 2～5.

The utility model ejection structure realizes that the reason of the utility model purpose is:

1, the effect of entrainmenting owing to the jet-flow that sprays from spray orifice has certain scope, on the primary air air inlet of certain area, changes one air-flow into the multiply air-flow, helps to increase the amount of entrainmenting of primary air;

2, in the household gas range, jet-flow is laminar jet in Venturi tube, with Air mixing be that outer surface from jet begins to carry out the molecule exchange with air, and progressively deeply be diffused into the process of laminar flow core inside.That is to say, be pure combustion gas in the core inside of jet, and the part beyond the jet is pure air, is combustion gas-AIR MIXTURES between the external boundary of jet and core border.Under the situation of same traffic, multiple jets is compared than sub-thread jet, and the laminar flow thickness of per share jet is little, that is to say the easier jet inside that is diffused into of air, and mixing velocity is faster, mixes more abundant;

3, the axes intersect of multiple jets, promptly multiple jets clashes in Venturi mutually, can cause the disorder of laminar jet, further forms turbulent jet.There is the horizontal pulsation of many molecule micelles turbulent jet inside, strengthen quality and momentum-exchange between jet and the surrounding air, and the air in multiply gas-flow axis angle of cut bottom is entrainmented, and forms a kind of " making dumplings " phenomenon, thereby has strengthened combustion gas and Air mixing process greatly.

4, clashing into mutually with two strands of symmetrical jets in the vertical Venturi tube is example, form one synthetic stream that converges behind the knock against each other again, the jet size has the flattening phenomenon on initial its vertical interface, after treating that the knock against each other jet mixes, total jet continues to flow with certain angle of flare again, and jet becomes wideer on the horizontal cross-section.And the jet angle of cut is big more, and the jet distortion is big more, mixes also more strongly, and energy impact loss simultaneously is also big more, and the jet decay is also fast more.Therefore, for reducing jet distortion and energy loss, its angle of cut is unsuitable excessive; More abundant in order to mix, its angle of cut is unsuitable too small.Present patent application unit has carried out lot of experiment validation by the experimental model that is example with two strands of symmetrical jets of single tube, under the situation of identical load flow, Venturi tube and air door opening size, when the angle of cut of the axis (promptly spraying the axis of the spray orifice of this jet) of jet and Venturi tube center line when 0 ° is increased to 45 °, its CO discharge capacity marked change along with the variation of angle.The CO flue gas is higher in the time of 0 °, drops to minimum point during to 2.5 ° suddenly, progressively rises then, surpasses 15 ° of rapid increases of flue gas later on and surpasses the national standard requirement.Meanwhile, efficiency index rises along with the rising of flue gas, and just amplitude eases up, and after taking all factors into consideration, we think that the angle of cut A of the axis of jet and Venturi tube center line to be advisable, wherein is preferably 7 ° between 2.5 °～15 °.Present patent application unit has also carried out similar experiment with the experimental model of three strands of symmetrical jets of configuration in the Venturi tube, and experimental result similar substantially with two strands is that effect is poor relatively slightly.

Therefore, under the same conditions, the utility model ejection structure is used multiply fuel gas flow phase impaction techniques, can strengthen the ejector capacity of primary air, strengthen combustion gas and Air mixing degree greatly, thereby application there is the burner of the utility model ejection structure to compare with the one-jet burner of traditional single tube, can strengthen the ejector capacity of primary air, strengthen combustion gas and Air mixing degree greatly, thereby improve efficiency of combustion and thermic load, reduce discharge of harmful gases in the flue gas.

Description of drawings

Fig. 1 is the partial structurtes schematic diagram of the utility model embodiment one;

Fig. 2 is the partial structurtes schematic diagram of the utility model embodiment two;

Fig. 3 is the partial structurtes schematic diagram of the utility model embodiment three;

Fig. 4 is the partial structurtes schematic diagram of the utility model embodiment four;

Fig. 5 is the partial structurtes schematic diagram of the utility model embodiment five.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Embodiment one

As shown in Figure 1, the ejection structure of present embodiment multi-jet flow gas combustion burner, it has Venturi tube 1, and the air inlet of this Venturi tube 1 has disposed three and has been in the nozzle 2 of establishing a spray orifice on conplane.The central lines of the axis of one of them spray orifice and described Venturi tube 1, and all the other two nozzles are with respect to the center line symmetric arrangement, and one A of the axes intersect of its two spray orifices on the center line of described Venturi tube 1, the angle of cut of the axis of spray orifice and Venturi tube center line is 2.5 °.

Embodiment two

As shown in Figure 2, the ejection structure of present embodiment multi-jet flow gas combustion burner, it has Venturi tube 1, and the air inlet of this Venturi tube has disposed two and has been in the nozzle 2 of establishing a spray orifice on conplane.Two nozzles are with respect to the center line symmetric arrangement of Venturi tube, and one A of the axes intersect of its two spray orifices on the center line of described Venturi tube 1, and the angle of cut of the axis of spray orifice and Venturi tube center line is 3.5 °.

Embodiment three

As shown in Figure 3, the ejection structure of present embodiment multi-jet flow gas combustion burner, it has Venturi tube 1, the air inlet of this Venturi tube has disposed two and has been in the nozzle 2 of establishing a spray orifice on conplane, one A of the axes intersect of one of them spray orifice on the center line of described Venturi tube, and the angle of cut of the axis of spray orifice and Venturi tube center line is 3.5 °, another B of the axes intersect of another spray orifice on the center line of described Venturi tube, and the angle of cut of the axis of spray orifice and Venturi tube center line is 3.5 °.

Embodiment four

As shown in Figure 4, the ejection structure of present embodiment multi-jet flow gas combustion burner, it has Venturi tube 1, establishes the nozzle 3 of establishing two spray orifices on the nozzle 2 of a spray orifice and one on the air inlet of this Venturi tube has disposed one, and nozzle 2 and nozzle 3 are in the same plane.The position of three spray orifices is provided with to close: the wherein axis of nozzle 3 spray orifice and the central lines of described Venturi tube, and one A of the axes intersect of all the other two spray orifices on the center line of described Venturi tube, and the angle of cut of the axis of spray orifice and Venturi tube center line is 2.5 °.

Embodiment five

As shown in Figure 5, the ejection structure of present embodiment multi-jet flow gas combustion burner, it has Venturi tube 1, the air inlet of this Venturi tube has disposed three nozzles 2 of establishing a spray orifice in the symmetrical distribution of Venturi tube center line, and one A of the axes intersect of three spray orifices on the center line of described Venturi tube, the angle of cut of the axis of spray orifice and Venturi tube center line is 3.5 °.

Above embodiment ejection structure is applied to the burner discovery that experimentizes, comprehensive flue gas, efficient and visual flame situation, more than in 5 enforcement in the ejection structure, effect optimum with embodiment two, the effect of embodiment three is the poorest, embodiment one and embodiment four are almost as broad as long, and the performance of embodiment five is better than the performance of embodiment one, embodiment four slightly.

Claims (9)

1, a kind of ejection structure of multi-jet flow gas combustion burner, it comprises nozzle and Venturi tube, the air inlet that it is characterized in that described Venturi tube disposes the nozzle of establishing a spray orifice at least on two, perhaps dispose the nozzle of establishing at least two spray orifices on one, perhaps dispose the nozzle of establishing a spray orifice at least one and the nozzle of establishing at least two spray orifices at least one.

2, ejection structure according to claim 1, it is characterized in that the axis of a spray orifice in the described spray orifice and the central lines of described Venturi tube, and the axes intersect of all the other spray orifices is on the center line of described Venturi tube, and the angle of cut of the center line of the axis of spray orifice and Venturi tube is 2.5～15 °.

3, ejection structure according to claim 2 is characterized in that the same point of axes intersect on described Venturi tube center line of described all the other spray orifices.

4, ejection structure according to claim 1 it is characterized in that the axis of described spray orifice all intersects on the center line of described Venturi tube, and the angle of cut of the center line of the axis of spray orifice and Venturi tube is 2.5～15 °.

5, ejection structure according to claim 4 is characterized in that the same point of axes intersect on described Venturi tube center line of described spray orifice.

6, ejection structure according to claim 3 is characterized in that the angle of cut of the center line of the axis of described spray orifice and Venturi tube is 3.5 °.

7, ejection structure according to claim 5 is characterized in that the angle of cut of the center line of the axis of described spray orifice and Venturi tube is 3.5 °.

8,, it is characterized in that the pairing spray orifice number of described Venturi tube is 2～10 according to the described ejection structure of arbitrary claim in the claim 2 to 7.

9, ejection structure according to claim 8 is characterized in that the pairing spray orifice number of described Venturi tube is 2～5.

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