JP3442925B2 - Nozzle device for sheet metal burner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle device applied to a sheet metal burner constructed by joining two press-formed upper and lower plates.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a gas outlet b of a valve casing a of a valve unit for controlling gas supply to a burner.
On the seat surface c that opened, the die-cast elbow block d
Is fastened via a packing e, and a protrusion i for receiving a damper h attached to the end face of the mixing tube part g of the burner is formed on the outer periphery of the elbow part f of the block d, and a cutting process is performed on the tip of the elbow part f. The nozzle j is screwed to form a nozzle device. In the figure, reference numeral k denotes a pilot gas outlet, and a tubular portion 1 communicating with the gas outlet k is formed in the elbow block d, and a pilot nozzle m is screwed to the tubular portion l.

[0003]

In the above-mentioned conventional example, the cost is increased because the die cast elbow block d and the cutting nozzle j are used. By the way, the burner made of sheet metal is lightweight, and the mixing pipe portion of the burner can be centered and held without using the die cast elbow block. In view of this point, the present invention has an object to provide an inexpensive nozzle device suitable for a sheet metal burner.

[0004]

[Means for Solving the Problems] In order to solve the above problems,
The present invention is a nozzle device applied to a sheet metal burner configured by joining two press-molded upper and lower plates, wherein a gas outlet of a valve casing of a valve unit for controlling gas supply to the burner is provided. A burner holder made of a sheet metal having a seat plate portion fastened to the opened seating surface and a pair of claw portions engaging with a mating portion of upper and lower two plates on both outer ends of the mixing tube portion of the burner. It is characterized in that the pipe fitted to the gas outlet is attached to the burner receiver, and the tip of the pipe inserted into the end of the mixing pipe is processed into the nozzle.

According to the present invention, the pair of claw portions of the burner receiver holds the mixing pipe portion of the burner in a centered manner, and the nozzle portion at the tip of the pipe attached to the burner receiver is surely aligned with the mixing pipe portion. To be done.

Here, the nozzle portion can be easily machined by squeezing the tip of the pipe, etc., and is cheaper than the conventional cutting nozzle. Further, since the burner receiver is also made of sheet metal, it is cheaper than the conventional die-cast elbow block, and the cost can be largely reduced as a whole.

The pipe is formed with a flange portion that abuts the back surface of the seat plate portion, and the gas outlet is formed in a stepped hole having a large diameter portion on the seat surface side into which the collar portion can be inserted. If an O-ring that is compressed between the bottom surface and the collar is provided to ensure the sealing performance between the gas outlet and the pipe, the packing as in the prior art is not required and the one side The cost can be reduced.

When a pilot gas outlet is provided on the seat surface of the valve housing in addition to the gas outlet, a pilot nozzle fitted into the pilot gas outlet is inserted into the seat plate portion of the burner receiver. , A pilot burner for inserting the pilot nozzle is provided. In this case, the pilot burner is made of sheet metal constituted by folding one plate,
If the plate forming the pilot burner is integrally formed with the burner receiver that is continuous with the seat plate, the pilot burner can be integrally molded with the burner receiver, so that the number of parts can be reduced and the cost can be reduced.

[0009]

1 is a burner for a stove having a front mixing tube section 10 and a rear annular burner head section 11. A burner cap 12 is attached to the burner head section 11. A flame hole 13 is formed between the burner head portion 11 and the burner cap 12 after mounting. The burner 1 is made of sheet metal and is press-formed with two upper and lower plates 1.
It is formed by joining a and 1b.

The gas supply to the burner 1 is controlled by a valve unit 2 containing a safety valve, a main valve opened / closed by a point extinguishing operation, a flow rate adjusting valve, and a pilot valve opened at the time of ignition operation. The valve casing 20 of the valve unit 2 has a gas outlet 21 connected to the flow rate adjusting valve and a pilot gas outlet 22 connected to the pilot valve.
The burner receiver 3 is attached to the seat surface 23 where the two gas outlets 21 and 22 on the upper side of 0 are opened.

The burner receiver 3 is made of sheet metal, and as shown in FIG. 2, a seat plate portion 30 fastened to the seat surface 23 and a standing plate which is bent upward from the rear edge of the seat plate portion 30 and stands up. Part 31
A pair of claw portions 32, 32 that bend and extend rearward from both side edges of the standing plate portion 31, and a pipe support portion 33 that is formed by recessing downward in the center of the bent portion of the upper edge of the standing plate portion 31. It has and.

Slit-shaped engaging grooves 32a are formed in the claws 32, 32, respectively, and as shown in FIG. 3, two upper and lower plates 1a, 1b on both outer ends of the mixing tube 10 are formed. The engaging grooves 32 of both the claw portions 32, 32 on the mating portions 10a, 10a
By engaging a and 32a, the mixing tube portion 10 can be centered and held by the burner receiver 3.

The burner receiver 3 has a pipe 4 fitted to the gas outlet 21 and a pilot nozzle 5 fitted to the pilot gas outlet 22. The upper half of the pipe 4 is bent into an elbow shape toward the mixing pipe portion 10 and fixed to the pipe supporting portion 33 by brazing or the like. The pipe 4 is made of a material that is easily plastically deformed, such as zincite or copper.
The tip of the pipe 4 inserted into the end of the nozzle is processed into the nozzle portion 40. This processing can be performed by narrowing the tip of the pipe 4 to a small diameter, or by crushing the tip of the pipe 4 and then opening a nozzle hole.

Further, the pipe 4 is formed with a flange portion 41 which comes into contact with the rear surface of the seat plate portion 30 of the burner receiver 3 by crushing the pipe 4 in the axial direction. And the gas outlet 21
4 is formed in a stepped hole having a large diameter portion 21a on the seat surface 23 side into which the collar portion 41 can be inserted, as shown in FIG.
The O-ring 42 is attached to the seat plate 30 of the burner receiver 3
When is fastened to the seat surface 23, the O-ring 42 is compressed between the collar portion 41 and the bottom surface of the large diameter portion 21a, so that the sealing property between the gas outlet 21 and the pipe 4 is ensured. .

The pilot nozzle 5 also has a seat plate portion 30.
Has a flange portion 50 that abuts the back surface of the pilot gas outlet 22, and the pilot gas outlet 22 is formed in a stepped hole having a large diameter portion 22a on the seat surface 23 side into which the flange portion 50 can be inserted. When the O-ring 51 is attached and the seat plate portion 30 is fastened to the seat surface 23, the O-ring 51 is compressed between the flange portion 50 and the bottom surface of the large diameter portion 22a, and the pilot gas outlet 21 and the pilot nozzle 5 are connected. The sealability between them is ensured.

A lower end portion of a pilot burner 8 is fitted on the pilot nozzle 5. Pilot burner 8
As shown in FIGS. 2 and 3, is made of sheet metal formed by folding back one plate, and this plate is integrated with the burner receiver 3 continuous to the seat plate portion 30 as shown in FIG. It is formed by the plate portion 34. According to this, the pilot burner 8 is integrally formed with the burner receiver 3. Therefore, a separate pilot burner and a support bracket for the pilot burner are not required, and the number of parts can be reduced and the cost can be reduced.

A half-pipe-shaped recess 34b is formed in the plate portion 34 at one half of the folding line 34a, and when the plate portion 34 is folded back along the folding line 34a, the other side of the folding line 34a is formed. The open surface of the recess 34b is closed by the half part, and the burner body 80 of the pilot burner 8 is formed. After that, the other half of the plate portion 34 is bent upward along the fold line 34c between the seat portion 30 and the pilot burner 8 to stand up, and the pilot nozzle 5 is passed under the burner body 80 through the seat plate portion 30. insert. An ignition electrode 81 facing the tip of the burner body 80 is attached to the pilot burner 8, and gas is ejected from the tip of the burner body 80 at the time of ignition operation to ignite the gas, and the pilot flame is integrated with the pilot burner 8. The formed guide portion 82 and the guide plate 1 attached to the burner 1.
4 to the flame hole of the burner 1 and ignite it.

When the pilot burner 8 is omitted, it goes without saying that the pilot nozzle 5 is unnecessary.

[Brief description of drawings]

FIG. 1 is a sectional view of an example of the device of the present invention.

FIG. 2 is a perspective view of a burner receiver.

FIG. 3 is a plan view of the burner receiver.

FIG. 4 is an enlarged sectional view of a portion where a burner receiver is attached to a seat surface.

[Fig. 5] Development view of burner receiver

FIG. 6 is a sectional view of a conventional example.

[Explanation of symbols]

1 Burner 1a, 1b Upper and lower plates 10 Mixing pipe part 10a Plate mating part 2 Valve unit 20 Valve housing 21 Gas outlet 21a Large diameter part 22 Pilot gas outlet 23 Seat surface 3 Burner receiver 30 Seat plate part 32 Claw part 34 For pilot burner Plate part 4 Pipe 40 Nozzle part 41 Collar part 42 O-ring 5 Pilot nozzle 8 Pilot burner

─────────────────────────────────────────────────── ─── Continued Front Page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F23D 14/06 F23D 14/48 F24C 3/00 F24C 3/08 F23Q 9/00

Claims (3)

(57) [Claims] 1. A nozzle device applied to a sheet metal burner configured by joining two press-molded upper and lower plates, which is a gas outlet of a valve casing of a valve unit for controlling gas supply to the burner. Burner receiver made of sheet metal having a seat plate portion fastened to the seat surface that has been opened, and a pair of claw portions that engage with the mating portions of the upper and lower two plates on both outer ends of the mixing tube portion of the burner. A nozzle device for a sheet metal burner, characterized in that a pipe fitted to the gas outlet is attached to a burner receiver, and the tip of the pipe inserted into the end of the mixing pipe portion is processed into a nozzle portion. 2. The pipe is formed with a flange portion that abuts the back surface of the seat plate portion, and the gas outlet is formed into a stepped hole having a large diameter portion on the seat surface side into which the flange portion can be inserted, and the large diameter portion is formed. An O-ring that is compressed between the bottom surface and the collar portion is provided to ensure the sealing performance between the gas outlet and the pipe.
Nozzle device for sheet metal burner according to. 3. A sheet for opening a pilot gas outlet on the seat surface of the valve casing, inserting a pilot nozzle fitted to the pilot gas outlet on the seat plate portion of the burner receiver, and inserting the pilot nozzle. 3. A pilot burner made of a sheet metal, which is formed by folding back the plate of claim 1, is provided, and the plate constituting the pilot burner is formed by a plate portion integrated with a burner receiver continuous with the seat plate portion. Nozzle device for the sheet metal burner described.