JPH0545418U - Gas burner - Google Patents

Abstract

(57) [Abstract] [Purpose] A plurality of flame openings for ejecting a mixed gas of fuel gas and primary air for combustion are provided in a row at intervals from each other, and from one side edge of each of the flame openings. A combustion surface forming wall extending in the mixed gas jetting direction is extended in the flame outlet row direction, and a discharge port for jetting the secondary air for combustion is formed on the combustion surface forming wall at one side edge of each flame outlet. In the gas burner supported in the fixed wall, both ends of the combustion surface forming wall are formed in the shape of slits extending in the mixed gas ejection direction from the corresponding portions of both ends of the combustion surface forming wall. The structure for supporting the fixed wall on the fixed wall is reasonably improved to prevent the problem that the wall for forming the combustion surface bends. [Structure] At least one of a pair of supporting portions 7, 7 for supporting both ends of the combustion surface forming walls 3 and 4 in the flame mouth row direction on the fixed walls 1B and 1D has the ends in the flame mouth row direction. It is configured to movably support.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, a plurality of flame nozzles for ejecting a mixed gas of fuel gas and primary air for combustion are provided in a row with a space between each other, and the mixed gas is ejected from one side edge of each of the flame orifices. A combustion surface forming wall extending in the direction of the flame mouth row, and discharge ports for injecting secondary combustion air into the combustion surface forming wall are provided at both ends of one side edge of each of the flame openings. The present invention relates to a gas burner, which is formed in a slit shape extending from each corresponding portion in a jet direction of a mixed gas, and both ends of the combustion surface forming wall body in a flame port array direction are supported by a fixed wall.

[0002]

[Prior Art]

 Conventionally, in such a gas burner, both ends of the combustion surface forming wall body in the flame mouth row direction are fixed to the fixed wall, for example, in a state where they cannot be moved in the flame mouth row direction by screwing.

[0003]

[Problems to be solved by the device]

 However, when the gas burner burns, the length of the combustion surface forming wall increases due to the expansion due to the temperature rise.In the conventional gas burner, however, both ends of the combustion surface forming wall are arranged in the flame opening direction. Since it is fixed to the fixed wall in a state that it cannot move to the inside, it is not possible to escape the increase in the length in the flame mouth row direction, so compressive stress is applied to the combustion surface forming wall in the flame mouth row direction. This will be the case. On the other hand, in such a gas burner, since a plurality of slit-shaped discharge ports for ejecting secondary air for combustion are formed in the wall for combustion surface formation, it has a characteristic that it is weak against compressive stress in the flame row direction. is doing. Therefore, the conventional gas burner has a problem that the combustion surface forming wall is bent due to the above-mentioned compressive stress. The present invention has been made in view of the above circumstances, and an object thereof is to rationally improve the structure for supporting the combustion surface forming wall body on the fixed wall, and to bend the combustion surface forming wall body. There is a point to prevent.

[0004]

The gas burner according to the present invention is characterized in that at least one of a pair of supporting portions for supporting both ends of the combustion surface forming wall body in the flame port array direction on the fixed wall. The point is configured so as to movably support the end portion in the flame outlet row direction.

[0005]

[Action]

 According to the above characteristic configuration, even if the length of the combustion surface forming wall increases due to the expansion due to the temperature rise, the end portion of the combustion surface forming wall moves in the support portion toward the outer side in the flame outlet row direction. Since this is possible, it is possible to escape the increase in the length in the direction of the flame outlets.

[0006]

[Effect of the device]

 As a result, it is possible to effectively prevent the compressive stress from being applied to the combustion surface forming wall body in the direction of the row of flame openings, and it is possible to reliably prevent the problem that the combustion surface forming wall body is bent. I arrived.

[0007]

【Example】

 Next, an embodiment will be described with reference to FIGS.

In the burner casing 1 formed by the walls 1A, 1B, 1C, 1D, a central vertical wall 2 is erected at the center between the walls 1A and 1C, and two left and right burner spaces are provided in the casing 1. The burner section having the same shape and the same configuration is formed in the left and right burner spaces.

Next, the left and right burner portions will be described. In the space inside the burner casing 1 and in the direction along the walls 1A and 1C, a plurality of upward flame openings 6 each having a rectangular opening shape are provided in rows at intervals to form a flame opening row. The two rows of flame nozzles are arranged in parallel at a predetermined interval. With respect to each of the flame port arrays, when viewed in the flame port array direction, a pair of left and right combustion surface forming wall members 3 extending upward in an inclined posture that is separated from the outer edge portions of the flame ports 6 of each of the left and right flame port arrays toward the upper side. 4 Each of them extends over the entire length of the flame nozzle array.

Each of the wall bodies 1B and 1D has a pair of support portions 7 and 7 for supporting both end portions of the left and right combustion surface forming wall bodies 3 and 4 in the flame mouth row direction on the wall bodies 1B and 1D, respectively. Has been placed. The supporting portion 7 is configured by internally providing the plate material 7a in the plate material 7b in a state where the plate materials 7a and 7b each having a bent portion perpendicular to the edge portion form a gap between the bent portions facing each other. Therefore, the gap between the bent portions of the plate members 7a and 7b formed on the edge of the support portion 7 is set so that the end portions of the left and right combustion surface forming wall bodies 3 and 4 in the flame mouth row direction are formed. The insertion portion 7c is to be inserted. Then, each of the end portions is inserted into the insertion portion 7c with a gap between the end portion and the bottom portion of the insertion portion 7c, so that the support portions 7 and 7 form the left and right combustion surfaces. Both end portions of the wall members 3 and 4 in the flame outlet row direction are movably supported in the flame outlet row direction.

A space surrounded by the left and right combustion surface forming walls 3 and 4 and the walls 1B and 1D is defined as a combustion space 10.

Regarding the formation of the flame ports 6 in both rows, the cross-sectional shape when viewed in the flame port array direction is substantially V-shaped, and the concave portions 5a that are elongated in the flame port array direction are formed on both sides of the V-shape. And the short convex portion 5b are alternately formed. The flame port forming material 5 is burned in parallel with the lower end inclined surfaces of the left and right combustion surface forming walls 3 and 4 and on the inner side of the lower end inclined surfaces. The convex portions 5b are arranged in contact with the lower end inclined surfaces of the surface forming wall bodies 3 and 4, respectively, so that the upper ends of the concave portions 5a of the flame nozzle forming member 5 and the left and right lower end inclined surfaces are respectively arranged. A pair of left and right rectangular flame openings 6 are formed in plan view.

The left and right partition walls 8, 8 are further lowered from both lower ends of the left and right combustion surface forming wall bodies 3, 4, and the lower ends of the left and right partition walls 8, 8 are integrally formed by a bottom wall 9. A mixed gas introduction space 11 is formed which is connected to and communicates with the combustion space 10 through the flame openings 6 and 6. In this mixed gas introducing space 11, a header pipe 12 for jetting a mixed gas, which has a jet end 12a formed at the tip and an opening at the other end, is attached along the flame outlet row direction, and is identical to the opening end. The nozzle 13 for jetting the fuel gas is exposed in the axial state. Therefore, while the fuel gas ejected from the nozzle 13 enters the header pipe 12 for ejecting the mixed gas, the primary air for combustion is taken in by the ejector effect created by the open ends of the nozzle 13 and the header pipe 12, It becomes a mixed gas for combustion, and the mixed gas is ejected from the ejection port 12a into the mixed gas introduction space 11. Then, the mixed gas flowing in the mixed gas introducing space 11 is configured to be jetted upward from the flame openings 6 and 6 along the combustion surface forming walls 3 and 4, respectively.

The wall 1A (or 1C) and the central vertical wall 2 are connected to the upper ends of the combustion surface forming walls 3 and 4, respectively, and the combustion surface forming wall 3 and the partition wall 8 are formed. Further, they are provided so as to face the combustion surface forming wall body 4 and the partition wall 8 respectively, and extend in the downward direction of the bottom wall 9. The walls 1B and 1D are also provided so as to extend downward from the bottom wall 9, so that the bottom surface of the burner casing 1 is formed into a rectangular opening K. Then, a space between the wall 1A (or 1C) and the combustion surface forming wall 3 and the partition wall 8, and between the central vertical wall 2 and the combustion surface forming wall 4 and the partition wall 8. Each of the spaces is partitioned by walls 1B and 1D on both sides, so that the secondary air for combustion, which is introduced from the opening K, flows upward in these spaces. It is said. In the figure, 15 is a punching plate for straightening, which has a large number of communication holes.

The left and right combustion surface forming walls 3 and 4 each have a slit-like discharge for ejecting the combustion secondary air flowing upward in the combustion secondary air supply passages 14 and 14 into the combustion space 10. From the outlets 16 to the respective flame ports 6 of each flame port array, from the corresponding positions of both ends of the edge of the respective flame ports 6 on the side of the combustion surface forming wall, to the surfaces of the left and right combustion surface forming walls 3 and 4, respectively. Along the imaginary lines L extending to the jetting destination of the primary mixed gas, the lower end is provided close to the flame port 6, and a plurality of these discharge ports 16 are provided as the discharge port 16 and the flame port 6. Are arranged so that they stagger each other in a staggered manner.

Further, auxiliary discharge ports 17 are provided between the virtual lines L so as to correspond to the flame ports 6 at the upper end portions of the left and right combustion surface forming wall bodies 3 and 4, respectively.

That is, the mixed gas is jetted upward from each of the flame openings 6 of each of the flame opening arrays along the left and right combustion surface forming walls 3 and 4, and the secondary air for combustion is discharged. By injecting from the slit-shaped discharge port 16 and the auxiliary discharge port 17 of each of the forming wall bodies 3 and 4, the mixed gas is burned along the left and right combustion surface forming wall bodies 3 and 4, respectively. I am doing it. It should be noted that the diluted mixed gas may be jetted from each of the slit-shaped discharge port 16 and the auxiliary discharge port 17 and the diluted mixed gas may be burned by the flame holding effect of the flame of the mixed gas jetted from the flame port 6. ..

[Other Embodiments] Next, other embodiments will be listed. In the above embodiments, the left and right combustion surface forming walls 3 and 4 are supported by the wall members 1B and 1D at their respective end portions in the flame port array direction. Although the pair of supporting portions 7 and 7 are configured to movably support the end portions in the flame mouth row direction, the pair of supporting portions 7 and Either one of them may be configured so as to support the end portion movably in the direction of the row of flame ports.

In the above-described embodiment, the plate member 7a is attached to the plate member 7a in the state where the supporting member 7 is formed such that the plate members 7a and 7b having the bent portions perpendicular to the edges form a gap between the bent portions facing each other. However, instead of this, a bellows-like portion that is expandable and contractible in the flame mouth row direction is continuously provided at the edge of the plate material, and the bellows-like portion is used for the left and right combustion surfaces. It is also possible to connect the respective end portions of the forming walls 3 and 4 in the flame mouth row direction to each other so that the end portions are movably supported in the flame mouth row direction.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a gas burner.

FIG. 2 is a partially cutaway front view of the gas burner.

FIG. 3 is a sectional side view of the gas burner.

[Explanation of symbols]

 1B, 1D Fixed wall 3,4 Combustion surface forming wall body 6 Flame port 7 Support part 16 Discharge port

Claims (1)

[Scope of utility model registration request] 1. A plurality of flame openings (6) for ejecting a mixed gas of fuel gas and primary air for combustion are provided in a row with a space therebetween, and one side edge of each of the flame openings (6). Wall for forming a combustion surface (3) extending from the portion in the direction of jetting the mixed gas,
(4) is extended in the flame outlet row direction, and discharge ports (16) for ejecting secondary air for combustion are provided in the combustion surface forming walls (3) and (4). Both ends of the combustion surface forming wall bodies (3) and (4) formed in the shape of slits extending in the mixed gas ejection direction from the corresponding ends of the respective one side edges are fixed walls. A gas burner supported by (1B), (1D), wherein both ends of the combustion surface forming walls (3), (4) in the flame mouth row direction are supported by the fixed walls (1B), (1D). At least one of the pair of supporting portions (7), (7) is configured to support the end portion so as to be movable in the flame nozzle row direction.