WO2004111537A1

WO2004111537A1 - Burner for portable burner device

Info

Publication number: WO2004111537A1
Application number: PCT/JP2003/007569
Authority: WO
Inventors: Atsushi Sakasai; Zenghui Lu
Original assignee: Asahi Seisakusho Co., Ltd.; Zhuhai Iwatani Gas Appliances Co., Ltd.
Priority date: 2003-06-13
Filing date: 2003-06-13
Publication date: 2004-12-23
Also published as: AU2003241655A1; AU2003241655A8

Abstract

A burner for a portable burner device formed by connecting a burner head and a mixing tube. The burner head and the mixing tube are connected in such a way that an inner rising wall of a circular, letter U-shaped groove of the mixing tube is fitted in a center hole opened in a lower end side of the burner head so as to connect the inner rising wall and the burner head lower end side. Preferably, the inner rising wall and the burner head lower side are fixed by the crimping of the burner head lower end side to a tip end portion of the inner rising wall of the circular, letter U-shaped groove.

Description

Specification

Technical field of burners for portable combustors

The present invention relates to a burner for a portable combustor such as a portable gas stove or a portable gas heater, and more particularly to a structure of a connecting portion of a mixing tube and a burner head constituting a burner. Background art

Burners for portable combustors, such as portable gas stoves and portable gas heaters, consist of a burner head and a mixing tube. FIG. 4 is a partially cutaway front view showing an example of the structure of a conventional burner.

The burner head 20 includes a cylindrical portion 21 and a flange portion 22 protruding from an upper edge of the cylindrical portion 21. A number of radially formed tooth-shaped grooves 12 are provided around the lower surface of the flange portion 22.

On the other hand, the mixing pipe 2 is composed of a primary combustion air inlet 4, a main body 3, and an annular U-shaped groove 5 provided near the end of the main body 3. The combustion gas primary air inlet 4 receives the combustion gas adjusted to a predetermined pressure by a governor (not shown) and has a function of sucking air. The main body 3 uses these as a mixture to form an annular U-shaped groove 5. It has the function of sending up to

The annular U-shaped groove 5 has a substantially U-shaped cross section, and is provided annularly near the end of the main body 3. The inside is an inner rising wall 6 having a relatively low height, and the outer side is an outer rising wall 7 having a relatively high height. The upper part is open except the inward flange 8 which is slightly downward from the outer rising wall 7.

The cylindrical portion 21 of the burner head 20 is fitted into the inner rising wall 6 of the annular U-shaped groove 5, and the cylindrical portion 21 is formed on the upper surface 8 a of the inward flange 8. The peripheral portion of the flange portion 22 protruding from the upper edge (portion where a large number of radially formed tooth-shaped grooves 12 are engraved) is placed. Thereby, the upper surface side of the U-shaped groove 5 is covered by the cylindrical portion 21 of the burner head 20 and the flange portion 22 protruding from the upper edge of the cylindrical portion 21 to form the distribution chamber 10. Also, before A flame port 13 is formed by an upper surface portion 8a of the inward flange 8 and a number of radially formed tooth-shaped grooves 12 around the lower surface of the flange portion 22 of the parner head 20. Incidentally, an auxiliary flame port (not shown) is usually provided on the upper surface of the burner head 20.

Generally, in the case of a burner for a portable combustor, it is required that the burner head 20 does not easily fall out of the mixing pipe 2 when carrying it. In addition, it is required that the two parts be closely contacted and fixed so that the combustion gas does not leak from the connection part between the parner head 20 and the mixing pipe 2 (for example, the fitting part of the parner head 20 into the cylindrical part 21). Is done. Therefore, in the conventional portable combustor burner 1, the inner rising wall 6 of the annular U-shaped groove 5 and the cylindrical portion 21 of the burner head 20 are manufactured with high precision, and the screw 11 for preventing the burner head 20 from falling off is provided. Is installed.

The conventional burner for portable combustor 1 is configured as described above.

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It is required that the finishing accuracy of the head 20 and the mixing tube 2 be high, and a process of screwing the burner head 20 to the mixing tube 2 must be provided in the assembling process, which makes it difficult to automate the manufacturing process. There was a problem.

In view of the above problems of the conventional portable combustor burner, the present invention automates the production and assembly of the portable combustor burner, and reduces the required processing accuracy to reduce costs. It is an object of the present invention to provide a structure of a dexterity burner, particularly a connecting portion between a mixing tube and a parner head which constitute a burner. Disclosure of the invention

The present invention is a burner for a portable combustor configured by combining a burner head and a mixing pipe, wherein a rising wall inside an annular U-shaped groove of the mixing pipe is fitted into a center hole opened at a lower end side of the burner head, The inner rising wall is fixed to the lower end of the burner head, and the burner head and the mixing tube are connected. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front sectional view showing an example of the structure of a burner for a portable combustor according to the present invention.

FIG. 2 is a front sectional view (a) and a bottom view (b) of the parner head. FIG. 3 is a plan view (a) and a front sectional view (b) of the mixing tube.

FIG. 4 is a partially cutaway front view showing an example of the structure of a conventional burner for a portable combustor. BEST MODE FOR CARRYING OUT THE INVENTION

Also in the present invention, as shown in FIG. 1, a burner 1 for a portable combustor is configured by connecting a burner head 20 and a mixing pipe 2 as in the conventional case.

As shown in FIG. 2, the burner head 20 is made of brass material as in the prior art, and a large number of tooth-shaped grooves 12 are provided radially on the lower peripheral edge of the upper end of the burner head 20. The lower end is opened to form a center hole 25.

As shown in FIG. 3, the mixing pipe 2 is made of sheet metal as in the past, and has a combustion gas primary air inlet 4, a main body 3, and an annular U-shaped groove provided near the end of the main body 3. It is composed of five. The combustion gas primary air inlet 4 has a function of receiving combustion gas adjusted to a predetermined pressure by a governor (not shown) and of sucking air. It has a function to feed up to the groove 5.

The annular U-shaped groove 5 has a substantially U-shaped cross section, and is provided annularly near the end of the main body 3. The inner side is an inner rising wall 6 and the outer side is an outer rising wall 7. The height of the inner rising wall 6 is relatively high unlike the conventional case. The upper part of the annular U-shaped groove 5 is an inward flange 8 that is directed obliquely downward from the outer rising wall 7 and is open except for that part.

In the present invention, the inner rising wall 6 of the annular U-shaped groove 5 is fitted into a center hole 25 formed at a lower end of the parner head 20. A large number of tooth-shaped grooves 12 radially provided on the lower peripheral edge of the upper end of 20 are placed on the inward flange 8 that faces obliquely downward from the outer rising wall 7 of the mixing tube 2. I'm familiar. Thereby, the upper surface of the U-shaped groove 5 is covered with the side surface of the burner head 20 to form the distribution chamber 10, and the upper surface 8a of the inward flange 8 and the lower surface of the upper end of the burner head 20. The flame mouth 13 is formed by a large number of tooth-shaped grooves 12 provided radially on the periphery. In the present invention, the above-mentioned perner head 20 and the mixing pipe 2 are connected by fitting the inner rising wall 6 of the annular U-shaped groove 5 of the mixing pipe 2 into the center hole 25 opened at the lower end side of the burner head 20. This is done by indenting. In order to fix the burner head 20 and the mixing pipe 2 and to make the airtightness more complete, it is preferable that the upper end 6a of the inner rising wall 6 and the lower end of the burner head 20 be caulked.

Thus, the shape and dimensions of the fixed portion of the burner head 20 and the mixing pipe 2, namely, the center hole 25 opened at the lower end side of the burner head 20 and the inner rising wall 6 of the annular U-shaped groove 5 of the mixing pipe are reduced. There is no need to process with high precision. In addition, since these fixing works can be performed by automatic staking work, the number of assembling steps can be greatly reduced.

The lower end of the parner head 20 only needs to have a shape and dimensions necessary for fixing the parner head 20 and the mixing pipe 2, and there is no need to provide a long cylindrical portion 21 which is necessary for a conventional burner head.

To caulk the upper end 6a of the inner rising wall 6 and the lower end of the burner head 20, in the example shown in FIG. 1, a stepped portion 24 is provided on the inner peripheral portion of the lower end of the parner head 20, and the stepped portion 24 is provided. The burner head 20 is tightly fixed by caulking the upper end 6a of the inner rising wall 6 at the same time. This closely fixed portion extends over the entire periphery of the stepped portion 24. Thereby, the flange 15 formed on the upper end portion 6a of the inner rising wall 6 and the stepped portion 24 are tightly adhered over the entire circumference at the time of caulking, and the airtightness of the inner rising wall portion can be secured. Airtightness can be ensured even if the caulked portion expands and contracts due to the difference in thermal expansion coefficient between the burner head and the mixing tube. When the upper end 6a of the inner rising wall 6 is swaged to the stepped portion 24, the upper surface 8a of the inward flange of the mixing pipe is pressed and flattened at the lower peripheral edge of the upper end of the burner head 20, so that The burner head 20 can be stably mounted on the upper surface 8a of the inward flange, and the flame port 13 can be formed uniformly.

Claims

The scope of the claims

1. The inner rising wall of the annular U-shaped groove of the mixing tube is fitted into the center hole opened at the lower end of the burner head, and the inner rising wall and the lower end of the burner head are fixed. And burner for portable combustor.

2. The burner for a portable combustor according to claim 1, wherein the lower end side of the burner head is fixed by caulking a front end portion of an inner rising wall of an annular U-shaped groove.

3.The toothed groove formed radially on the lower peripheral edge of the upper end of the burner head shall be mounted on an inward flange that faces obliquely downward from the outer rising wall of the annular U-shaped groove of the mixing tube. The burner for a portable combustor according to claim 2, characterized in that:

4.A stepped portion is provided on the inner periphery of the center hole opened to the lower side of the burner head 5mm, and the upper end of the inner rising wall of the annular U-shaped groove is swaged to the stepped portion. The burner for a portable combustor according to claim 2.

5.Fit the inner rising wall of the annular U-shaped groove of the mixing tube into the center hole opened at the lower end of the burner head, fix the inner rising wall and the lower end of the burner head, and connect the burner head and the mixing tube. A method for manufacturing a portable burner parner, characterized by combining.