JP5631946B2 - Tint burner - Google Patents

Description

  The present invention is directed to the upper end of the light flame having a fuel concentration that is leaner than the stoichiometric air-fuel ratio. The present invention relates to a light and dark burner having a blind air gap, and a rich flame outlet that is located laterally outside the blind air gap and ejects a rich air-fuel mixture having a fuel concentration higher than the stoichiometric air-fuel ratio.

  This type of light and dark burner has, as its constituent members, a burner body having a pair of side plates facing each other in the lateral direction, and a side plate that covers the burner body from the outside of at least one side in the lateral direction (the side where the rich flame opening is disposed). A cap and a rectifying member that is mounted between both side plates of the burner body and has a plurality of rectifying plates that divide the pale flame opening into a plurality of regions in the lateral direction. And conventionally, the upper end of each side plate of the burner body is located at the same height as the upper end of the side plate of the burner cap and the upper end of each rectifying plate, and among the rectifying plates of the rectifying member, the outer rectifying plate adjacent to the blind gap A blind gap is defined between the burner body and the side plate of the burner body, and a rich flame opening is defined between the side plate of the burner body and the side plate of the burner cap (see, for example, Patent Document 1).

  Here, since the defined portions of the pale flame mouth and the rich flame mouth become high temperature, conventionally, the burner main body, the burner cap, and the rectifying member are made of a SUS material excellent in high temperature durability. However, the portion of the burner body that becomes hot is only the upper end of the side plate, and forming the entire burner body with an expensive SUS-based material is problematic in terms of cost reduction.

JP 2007-285536 A

  In view of the above points, an object of the present invention is to provide a light and dark burner that eliminates the need to form the burner body from a material excellent in high-temperature durability and can reduce costs.

  In order to solve the above-mentioned problems, the present invention is directed to an upper end portion of a pale flame outlet that is longitudinal in the front-rear direction for injecting a pale air-fuel mixture having a leaner fuel concentration than the stoichiometric air-fuel ratio, and at least one lateral side of the pale flame mouth A burner having a blind air gap where no air-fuel mixture is ejected, and a rich flame outlet which is located laterally outside the blind air gap and which ejects a rich air-fuel mixture having a fuel concentration higher than the stoichiometric air-fuel ratio, As a constituent member, a burner body having a pair of side plates facing each other in the lateral direction, a burner cap having a side plate covering the burner body from at least one side in the lateral direction, and both side plates of the burner body, The upper end of each side plate of the burner main body is lower than the upper end of the side plate of the burner cap and the upper end of each of the current plate, Multiple A partition plate that is located laterally outside the outer rectifying plate adjacent to the blind gap in the flow plate and extends above the side plate of the burner body, and a blind gap is defined between the partition plate and the outer rectifying plate. And a rich flame opening is defined between the partition plate and the side plate of the burner cap.

  According to the present invention, since the upper end of the side plate of the burner body is located below the partition plate that defines the rich flame outlet, the burner body does not become as hot as it is to the left. Therefore, it is not necessary to form the burner body with a material excellent in high temperature durability, and the cost can be reduced.

  In the present invention, the rectifying member preferably has bridge portions that connect the upper end of the partition plate and the upper end of the outer rectifying plate at a plurality of locations in the front-rear direction. According to this, a bridge part becomes a support and the horizontal displacement of the partition plate by aged deterioration is suppressed. Therefore, it is possible to effectively prevent the lateral width of the rich flame opening and the blind gap from being changed by the lateral displacement of the partition plate, and deterioration of combustibility.

  Furthermore, it is desirable that the rectifying member has a throttle portion that divides the pale flame opening in the front-rear direction by bringing a plurality of rectifying plates into close contact with each other in the front-rear direction position that matches each bridge portion. According to this, the thermal influence on the bridge part by the flame which arises in a pale flame mouth can be reduced, and durability of a bridge part improves.

  Further, when the burner cap has a pair of side plates that cover the burner body from the outer side on one side in the horizontal direction and the outer side on the other side in the horizontal direction, and a plurality of front and rear bridge portions that connect between the upper ends of the both side plates, Each of the bridge portions is preferably provided at a position in the front-rear direction matching the bridge portion of the rectifying member so as to contact the bridge portion of the rectifying member. According to this, the bridge portion of the burner cap is cooled by heat sinking to the bridge portion of the rectifying member maintained at a relatively low temperature, and the durability of the bridge portion of the burner cap is also improved.

The perspective view which shows the light and dark burner of embodiment of this invention. Sectional drawing cut | disconnected by the II-II line | wire of FIG. The disassembled perspective view of the light and dark burner of embodiment. The cut perspective view of the principal part of the light and shade burner of an embodiment. The cut perspective view of the principal part of the light and dark burner of 2nd Embodiment. Sectional drawing of the principal part of the light and dark burner of 3rd Embodiment. Sectional drawing of the principal part of the light and dark burner of 4th Embodiment.

  1 and 2, reference numeral 1 denotes a light and dark burner according to an embodiment of the present invention. The light and dark burner 1 has, at its upper end, a light flame outlet 2 that is long in the front-rear direction for injecting a light air mixture whose fuel concentration is less than the stoichiometric air-fuel ratio, and a gas mixture that is located on both lateral sides of the light flame mouth 2. Is located in a pair of blind gaps 4 and 4 where no gas is ejected, a laterally outer side of the blind gap 4 on one side in the lateral direction of the pale flame mouth 2, and a laterally outer side of the blind gap 4 on the other lateral side of the pale flame mouth 2 And a pair of rich flame ports 3 and 3 for ejecting a rich air-fuel mixture having a fuel concentration higher than the stoichiometric air-fuel ratio.

  Referring also to FIG. 3, the light / dark burner 1 includes, as its constituent members, a burner body 5 having a pair of side plates 51, 51 facing each other in the lateral direction, the burner body 5 on the outer side on one side and the other side in the lateral direction A burner cap 6 having a pair of side plates 61, 61 covering from the outside of the burner, and a plurality of rectifying plates mounted between the side plates 51, 51 of the burner body 5 and dividing the pale flame opening 2 into a plurality of regions in the lateral direction. The flow regulating member 7 is provided.

The both side plates 51, 51 of the burner body 5 are formed by bending one plate into a palmar state at a folding line that becomes the lower edge of the burner body 5. Further, the burner body 5 is formed by pressing both side plates 51, 51, and a light mixing tube portion 52 extending forward from an inflow port 52 a that opens at the lower rear end of the burner body 5, and a light mixing tube portion A light passage portion 53 that guides the light air-fuel mixture from 52 to the light flame opening 2 is provided. The opening area of the inlet 52a of the light mixing pipe portion 52 is relatively large, and a relatively large amount of primary air flows into the light mixing pipe portion 52 together with fuel gas from a light gas nozzle (not shown) facing the inlet 52a. Thus, a light mixture is generated. The light passage portion 53 extends from the front end portion of the light mixing tube portion 52 so as to expand in the front-rear direction.

  Further, a thick mixing tube portion 54 formed by pressing both side plates 51, 51 is provided at a portion between the light mixing tube portion 52 and the light passage portion 53 of the burner body 5. The concentrated mixing pipe portion 54 is terminated slightly forward from an inflow port 54a opened at the rear end of the burner body 5, and an outflow hole 54b is formed on the outer surface of the front portion. The opening area of the inlet 54a of the concentrated mixing pipe portion 54 is relatively small, and a relatively small amount of primary air flows into the concentrated mixing pipe portion 54 together with fuel gas from a concentrated gas nozzle (not shown) facing the inlet 54a. Thus, a rich mixture is generated.

  The rich air mixture flowing out from the outflow holes 54b of the thick mixing pipe portion 54 is sent to the rich flames via the rich passage portions 62 defined between the side plates 51 of the burner body 5 and the side plates 61 of the burner cap 6. Guided to mouth 3. Moreover, the recessed part 63 which divides | segments the rich flame mouth 3 in the front-back direction is formed in the front-back several places of the upper part of each side board 61 of the burner cap 6. As shown in FIG.

  The rectifying member 7 has a pair of inner rectifying plates 71in on the inner side in the lateral direction and a pair of outer rectifying plates 71out located on the outer sides in the lateral direction. Further, the rectifying plates 71in and 71out on the inner and outer sides are arranged. A plurality of throttle portions 72 are provided at the front and rear portions that are closely contacted in the lateral direction and divide the pale flame opening 2 in the front-rear direction. Further, each inner rectifying plate 71in and the outer rectifying plate 71out adjacent to the inner rectifying plate 71in are connected by folded connection portions 73 provided at a plurality of positions at the front and rear of the lower end thereof.

  By the way, in this embodiment, as shown in FIGS. 2 and 4, the upper ends of the side plates 51 of the burner body 5 are lower than the upper ends of the side plates 61 of the burner cap 6 and the upper ends of the rectifying plates 71 in and 71 out. It is formed as follows. On the other hand, the rectifying member 7 is positioned laterally outside the both outer rectifying plates 71out and 71out adjacent to the respective blind gaps 4 and is in contact with the inner surface of the upper end of each side plate 51 of the burner body 5 without any gap. A pair of partition plates 74, 74 extending upward from the side plate 51 is provided. Each rich flame port 3 is defined between each partition plate 74 and each side plate 61 of the burner cap 6.

  Further, in the vicinity of the upper end of each side plate 51 of the burner body 5, a laterally inwardly recessed portion 55 approaching each outer rectifying plate 71out of the rectifying member 7 is formed, and this dent portion 55 and each outer rectifying plate 71out, The lower ends of the partition plates 74 are inserted in the gaps between the partition plates 74 so as to close the gaps. Each blind gap 4 is defined between each partition plate 74 and each outer rectifying plate 71out.

  Here, since the burner cap 6 and the rectifying member 7 are heated by the flame (rich flame) generated at the rich flame port 3 and the flame (light flame) produced at the pale flame port 2, respectively, SUS430 having excellent high-temperature durability. It is necessary to form with expensive materials, such as. On the other hand, the burner body 5 does not become as hot as the left because the upper end of the side plate 51 is positioned below the partition plate 74 that defines the rich flame port 3. Therefore, it is not necessary to form the burner body 5 constituting the majority of the light and dark burner 1 with a material excellent in high temperature durability, and the burner body 5 is formed with a relatively inexpensive material such as SA1D, thereby reducing the cost. Can be planned.

  In the present embodiment, bridge portions 75 that connect the upper ends of the partition plates 74 and the upper ends of the outer rectifying plates 71out are provided at a plurality of positions on the front and rear of the rectifying member 7. According to this, the bridge portion 75 serves as a support, and the lateral displacement of the partition plate 74 due to aging deterioration is prevented. Therefore, it is possible to effectively prevent the lateral width of the rich flame port 3 and the blind gap 4 from being changed by the lateral displacement of the partition plate 74 and deteriorating the combustibility.

  Moreover, in this embodiment, the aperture | diaphragm | squeeze part 72 which divides | segments the pale flame mouth 2 in the front-back direction is provided in the front-back direction position which corresponds to each bridge part 75 of the baffle member 7. FIG. According to this, the bridge part 75 will be located in the division | segmentation location of the pale flame mouth 2, the thermal influence to the bridge part 75 by a pale flame can be reduced, and durability of the bridge part 75 improves.

  The burner cap 6 has a plurality of bridge portions 64 at the front and rear portions that connect the upper ends of both side plates 61 and 61. And each bridge part 64 of the burner cap 6 is provided in the front-back direction position which agree | coincides with each bridge part 75 of the rectification | straightening member 7, so that these bridge parts 75 may be contacted. According to this, the bridge part 64 of the burner cap 6 heated by the rich flame is cooled by heat sinking to the bridge part 75 of the rectifying member 7 maintained at a relatively low temperature, and the durability of the bridge part 64 of the burner cap 6 is achieved. Also improves.

  In addition, without providing the bridge part 75 which connects the upper end of each partition plate 74 and the upper end of each outer rectifying plate 71out, as in the second embodiment shown in FIG. 5, each outer rectifying plate 71out and each partition plate 74 It is also possible to connect the two by means of folded connection portions 76 provided at a plurality of positions before and after the lower end.

  Further, as in the third embodiment shown in FIG. 6, the side plate 61 on one side (right side) of the burner cap 6 is overlapped with the right partition plate 74 of the rectifying member 7 and the right rich flame port 3 is omitted. It is also possible to do. In this case, a similar light / dark burner 1 is juxtaposed on the right side of the light / dark burner 1, and the dark flame outlet 3 on the left side of the latter light / dark burner 1 is adjacent to the blind gap 4 on the right side of the former light / dark burner 1.

  Further, as in the fourth embodiment shown in FIG. 7, not only the horizontal flame outlet 3 on one side (right side) but also the right side gap 61 on the right side, the right side plate 61 of the burner cap 6, and the right side of the rectifying member 7. It is also possible to omit the partition plate 74. In this case, the same light / dark burner 1 is juxtaposed on the right side of the light / dark burner 1, and the right outer rectifying plate 71 out of the rectifying member 7 of the former light / dark burner 1 and the left side plate of the burner cap 6 of the latter light / dark burner 1 A blind gap 4 ′ is defined between 61 and 61, which is located between the light flame outlet 2 of the former light and dark burner 1 and the light flame mouth 3 of the latter light and dark burner 1.

  DESCRIPTION OF SYMBOLS 1 ... Dark burner, 2 ... Pale flame outlet, 3 ... Deep flame outlet, 4 ... Blind gap, 5 ... Burner main body, 51 ... Side plate, 6 ... Burner cap, 61 ... Side plate, 64 ... Bridge part, 7 ... Rectification member, 71 in ... inner rectifying plate, 71 out ... outer rectifying plate, 72 ... throttle portion, 74 ... partition plate, 75 ... bridge portion.

Claims (4)

At the upper end, there is a pale flame port that is long in the front-rear direction for jetting a lean air-fuel mixture having a leaner fuel concentration than the stoichiometric air-fuel ratio, and a blind gap that is located at least on one side of the pale flame mouth and that does not jet air-fuel mixture. A concentration burner that is located laterally outside the blind gap and has a rich flame outlet that ejects a rich air-fuel mixture having a fuel concentration higher than the stoichiometric air-fuel ratio,
As a burner constituent member, a burner body having a pair of side plates facing each other in the lateral direction, a burner cap having a side plate covering the burner body from at least one side in the lateral direction, and both side plates of the burner body are mounted. In what comprises a rectifying member having a plurality of rectifying plates that divide the mouth into a plurality of regions in the lateral direction,
The upper end of each side plate of the burner body is lower than the upper end of the side plate of the burner cap and the upper end of each rectifying plate, and the rectifying member is positioned laterally outside the outer rectifying plate adjacent to the blind gap among the plurality of rectifying plates. And a partition plate extending upward from the side plate of the burner body, a blind gap is defined between the partition plate and the outer rectifying plate, and a rich flame port is defined between the partition plate and the side plate of the burner cap. A light and dark burner characterized by being made.   2. The light and dark burner according to claim 1, wherein the rectifying member has bridge portions that connect the upper end of the partition plate and the upper end of the outer rectifying plate at a plurality of locations in the front-rear direction.   The rectifying member has a throttle portion that divides the pale flame port in the front-rear direction by bringing the plurality of rectifying plates into close contact in the lateral direction at positions in the front-rear direction that match the bridge portions. 2. The light and dark burner according to 2. 4. The light and dark burner according to claim 3, wherein the burner cap connects a pair of side plates covering the burner body from the outer side on one side in the horizontal direction and the outer side on the other side in the horizontal direction, and a plurality of front and rear connecting the upper ends of the both side plates. In what has the bridge part of the place,
Each bridge part of a burner cap is provided in the front-back direction position corresponding to each said bridge part of the said rectifying member so that it may contact on each bridge part of a rectifying member, The density | concentration burner characterized by the above-mentioned.

Images