TWI554729B - Burner - Google Patents

Description

burner Field of invention

The present invention relates to a burner comprising: a burner body having laterally opposite one side plates, and a burner cover having side plates covering the burner body at least from the lateral side of the lateral side, Between the two sides of the burner body, a main combustion port at the upper end, a main mixed gas passage for supplying the mixed gas to the main combustion port, and an upper end between the side plate of the burner cover and the side plate of the burner body are disposed. The pilot combustion port and the mixed gas that is branched from the main mixed gas passage through the vent hole formed in the side plate of the burner body are supplied to the pilot mixed gas passage of the pilot burner.

Background of the invention

Conventionally, in such a burner, the lower portion of the side plate of the burner cover located below the igniting mixed gas passage is superposed on the outer side of the portion corresponding to the main mixed gas passage of the side plate of the burner body (for example, reference) Patent Document 1). Further, it is not easy to ensure the sealing property of the igniting mixed gas passage by merely overlapping the lower portion of the side plate of the burner cover to the outer side surface of the side plate of the burner body, and therefore, it is known that the lower portion of the side plate of the burner cover is provided. Solder to the side panel of the burner body.

However, at the distance from the spot weld, the lower portion of the side plate of the burner cover cannot be surely adhered to the side plate of the burner body, and the sealing property of the igniting mixed gas passage cannot be greatly improved.

Advanced technical literature Patent literature

[Patent Document 1] Japanese Patent Laid-Open No. Hei 8-75124

Summary of invention

The present invention has been made in view of the above, and it is an object of the invention to provide a burner which can improve the sealing property of a pilot gas mixture passage.

In order to solve the above problems, the present invention includes a burner body having a pair of side plates laterally opposed to each other, and a burner cover having a side plate covering the burner body at least from the lateral side, and the burner body is Between the two side plates, a main combustion port at the upper end, a main mixed gas passage for supplying the mixed gas to the main combustion port, and a igniting combustion port at the upper end between the burner body and the side plate of the burner cover are provided. The mixed gas which is branched from the main mixed gas passage via the vent hole formed in the side plate of the burner body is supplied to the igniting mixed gas passage of the pilot burner, and is a side plate of the burner cover located below the pilot mixed gas passage a lower portion of the burner that coincides with the outer side of the portion of the side wall of the burner body, wherein the side plate of the burner body is formed with a portion that is located at a lower portion of the side plate of the burner cover and Horizontally The first extension portion is formed, and a second extension portion that is stretched in the same direction as the first extension portion so as to be fitted to the first extension portion is formed in a lower portion of the side plate of the burner cover.

According to the invention, even the lower part of the side plate of the burner cover is burned A plurality of gaps are formed between the side plates of the main body, and the gap is also bent laterally between the first and second extension portions. Therefore, the ventilation resistance of the gap is increased, and the sealing property of the igniting mixed gas passage is improved.

Further, in the present invention, the first and second extension portions are preferably formed to be recessed toward the laterally inner side. Thereby, the first extension portion protrudes into the main mixed gas passage, and a vortex is generated on the downstream side of the first extension portion with respect to the flow of the mixed gas in the main mixed gas passage, thereby promoting mixing of the fuel gas and the primary air.

1‧‧‧ burner

2‧‧‧ burner body

3‧‧‧ burner cover

4‧‧‧ main burner

5‧‧‧Main mixed gas path

5a‧‧‧Stenosis

6‧‧‧Mixed Tube Department

6a‧‧‧Inlet

7‧‧‧Fire inlet

8‧‧‧Fire-mixed gas path

8a‧‧‧Ventinel

9 ₁ ‧‧‧1st extension

9 ₂ ‧‧‧2nd extension

21‧‧‧The side plate of the burner body

21a‧‧‧ recess

22‧‧‧Upper board

31‧‧‧The side panel of the burner cover

32‧‧‧Bridge Department

Fig. 1 is a perspective view of a burner according to an embodiment of the present invention.

Fig. 2 is an enlarged cross-sectional view taken along line II-II of Fig. 1 .

Referring to Figures 1, 2 and 1, a burner showing an embodiment of the present invention. The burner 1 has a long side in the front and rear directions, and includes: a burner body 2 having laterally opposite one side plates 21, 21; and a pair of side plates 31 having the burner body 2 covering the outer sides from the lateral sides, Burner cover 3 of 31.

Between the two side plates 21, 21 of the burner body 2, a main combustion port 4 at the upper end and a main mixed gas passage 5 for supplying a mixed gas to the main combustion port 4 are provided. The main combustion port 4 is formed by a plurality of intervals in the front-rear direction on the upper plate 22 on the upper ends of the connecting side plates 21 and 21. Also, in the burner body 2 In the lower portion, a mixing pipe portion 6 that extends rearward from the front end inlet 6a is formed, and the main mixed gas passage 5 extends upward from the rear end portion of the mixing pipe portion 6 toward the front-rear direction. Further, the mixed gas of the fuel gas and the primary air that has flowed in from the inflow port 6a is guided to the main combustion port 4 via the mixing pipe portion 6 and the main mixed gas passage 5. Further, a narrow portion 5a for narrowing the banner is provided in the intermediate portion of the main mixed gas passage 5 in the lower direction, and the uniformity of the distribution in the longitudinal direction of the burner of the mixed gas in the main mixed gas passage 5 can be ensured. Further, the side plates 21, 21 and the upper plate 22 of the burner body 2 are formed by bending a single sheet.

Between the side plates 21 of the burner body 2 and the side plates 31 of the burner cover 3, a pilot combustion port 7 at the upper end and a pilot gas mixture passage 8 for supplying the mixed gas to the pilot burner port 7 are provided. The lower portion of each side plate 31 of the burner cover 3 located below the igniting mixed gas passage 8 is a portion overlapping each side plate 21 of the burner body 2, and the portion of each side plate 21 of the burner body 2 is narrower than the ratio. The portions of the main mixed gas passage 5 which are slightly above the portion 5a are identical.

Further, in the side plates 21 of the burner main body 2, the vent holes 8a that communicate the main mixed gas passage 5 and the igniting mixed gas passage 8 are located above the portion overlapping the lower portions of the side plates 31 of the burner cover 3, and are stored before and after A plurality of directions are formed at intervals. The mixed gas branched from the main mixed gas passage 5 via the vent holes 8a is supplied to the pilot combustion port 7 via the igniting mixed gas passage 8, and is held by the igniting formed on the pilot combustion port 7 The main fire on the burner port 4. Further, in each of the side plates 21 of the burner cover 3, a concave portion 21a for narrowing the banner of the priming gas passage 8 is formed. It is possible to ensure the uniformity of the distribution in the longitudinal direction of the burner of the mixed gas of the pilot gas mixture passage 8. Further, the burner cover 3 has a bridge portion 32 that connects the upper ends of the side plates 31, 31 at a plurality of front and rear portions.

However, it is difficult to ensure the sealing property of the priming gas passage 8 only by simply overlapping the lower portion of the side plate 31 of the burner cover 3 with the outer surface of the side plate 21 of the burner body 2. Therefore, in the present embodiment, the side plate 21 of the burner body 2 is formed at a portion where the lower portion of the side plate 31 of the burner cover 3 overlaps, and the first extension portion 9 ₁ which has been subjected to the drawing process in the lateral direction, and in the burner a lower plate 31 of the cover 3, the extension portion ₉₁ so as to fit with the first, has been formed for the second extension portion ₉₂ and the extension processing of the same direction as the first extension portion _91. Further, the first and second extension portions 9 ₁ and 9 _{2 may} be stretched and formed to be laterally outwardly recessed. However, in the present embodiment, the two extension portions 9 ₁ and 9 _{2 are} formed to be recessed toward the lateral side. .

Accordingly, even if a certain gap is formed between the lower portion of the side plate 31 of the burner cover 3 and the side plate 21 of the burner body 2, the gap is also between the first and second extension portions 9 ₁ and 9 ₂ . The lateral bending is performed, so that the ventilation resistance of the gap becomes large, and the sealing property of the ignition mixed gas passage 8 is improved. Further, since the two extension portions 9 ₁ and 9 _{2 are} formed to be recessed toward the inner side in the lateral direction, the first extension portion 9 ₁ protrudes into the main mixed gas passage 5, and the flow of the mixed gas in the main mixed gas passage 5 is The downstream side of the first extension portion 9 ₁ generates a vortex to promote mixing of the fuel gas with the primary air.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, also it has been to make _{91, 92} fitted state of the two extension portions of the first and the second case, the longitudinal portion of the burner in the direction of extension of two spot welded portions _{91, 92.}

Further, the burner cover 3 of the above embodiment has the burner main body 2 covering one of the side plates 31 and 31 from the lateral sides, but may be a side plate having only the outer side of the burner body 2 from the lateral side. . Further, in the above embodiment, the main combustion port 4 is formed in the upper plate 22 of the burner main body 2. However, the upper plate 22 may be omitted, and the main combustion may be formed by the gap between the upper ends of the side plates 21 and 21 of the burner main body 2. mouth.

4‧‧‧ main burner

5‧‧‧Main mixed gas path

5a‧‧‧Stenosis

7‧‧‧Fire inlet

8‧‧‧Fire-mixed gas path

8a‧‧‧Ventinel

9 ₁ ‧‧‧1st extension

9 ₂ ‧‧‧2nd extension

21‧‧‧The side plate of the burner body

21a‧‧‧ recess

22‧‧‧Upper board

31‧‧‧The side panel of the burner cover

32‧‧‧Bridge Department

Claims (2)

A burner comprising: a burner body having laterally opposite one pair of side plates; and a burner cover having side plates covering the burner body from the outer sides of the lateral sides, and between the plates on both sides of the burner body, The main combustion port at the upper end and the main mixed gas passage for supplying the mixed gas to the main combustion port are provided between the burner body and the side plate of the burner cover, and the upper side of the ignition burner and the main mixed gas passage are provided. The mixed gas branched through the vent hole formed in the side plate of the burner body is supplied to the igniting mixed gas passage of the pilot burner, and the lower portion of the side plate of the burner cover located below the igniting mixed gas passage is superposed and burned The burner on the outer side of the portion of the side wall of the main body of the main body of the main body of the main body of the main body is characterized in that: the main part of the burner cover which covers the burner body from the outer side of the lateral side is provided with the main combustion at the upper end of the burner body The upper part of the upper plate is connected by a bridge portion, and the bridge portion abuts against the upper plate, and the side plate of the burner body is formed at the burner a portion where the lower portion of the side plate overlaps and a first extension portion that is stretched in the lateral direction, and a lower portion of the side plate of the burner cover is formed in the same direction as the first extension portion so as to be fitted to the first extension portion. The second extension portion of the extension processing was performed. A burner according to claim 1, wherein the first and second extensions are stretched to be laterally recessed.