JP2936977B2 - Structure and manufacturing method of 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 structure and a manufacturing method of an auxiliary combustion device installed in a pot of a pot type oil combustor.

[0002]

2. Description of the Related Art A pot-type oil combustor has a number of small holes formed in a peripheral wall of a pot, a disc-shaped blue flame cap is provided in an upper portion of the pot, and a combustion ring or the like is continuously connected to the blue flame cap via a support leg. And integrated combustion assist device (Jikku 63-14
No. 173 / Fig. 3).

[0003] In these conventional pot-type oil combustors having a blue flame cap, the fuel supplied into the pot is vaporized,
The vaporized gas is suppressed in combustion by the blue flame cap, and is primarily burned below the blue flame cap by air supplied from a small hole in the peripheral wall of the pot. The primary combustion is mainly performed by thermal decomposition of the vaporized gas and mixing with air. The mixed gas is completely burned with a short blue flame on the side of the blue flame cap by air supplied from the side of the blue flame cap.

[0004]

As shown in FIG. 4, the auxiliary device for a pot-type oil combustor includes a blue flame cap 2, a combustion ring 3, and a support leg 4 which are individually manufactured and then spot welded. Since the combustion assist device was assembled by attaching each member as described above, the number of parts was large, and spot welding was also required according to the number of parts, resulting in high production costs.

Further, the applicant tried to cut and raise the support legs 4 from the combustion ring 3 for integration, but the cut and raise alone failed because the distance between the blue flame cap 2 and the combustion ring 3 was not sufficient. However, if integration becomes possible, it will greatly contribute to cost reduction.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a number of small holes 1a are formed in the peripheral wall of the pot 1,
A disc-shaped blue flame cap 2 is located in the upper part of the pot 1, and a combustion ring 3 is attached to the peripheral wall of the pot 1 below the blue flame cap 2. In a pot-type oil combustor provided with an integrated combustion assist device, a plurality of arc-shaped supporting legs 4 are formed along the inner edge of the central hole of the combustion ring 3, and the blue flame of the supporting leg 4 is formed at the center of the central hole. A cap mounting portion 4a is formed. The arc-shaped support leg 4 has one end connected to the combustion ring 3 and the other end connected to the blue flame cap mounting portion 4a, and a continuous portion with the combustion ring 3 is bent upward to form a blue flame. A continuous portion with the cap mounting portion 4a is bent downward, and the support leg 4 holds the combustion ring 3 and the blue flame cap 2 at a constant interval.

Further, a number of small holes 1a are formed in the peripheral wall of the pot 1, a disc-shaped blue flame cap 2 is positioned in the upper part of the pot 1, and a combustion ring 3 is placed on the peripheral wall of the pot 1 below the blue flame cap 2. Attach the combustion ring 3 and blue flame cap 2
In a pot-type petroleum combustor provided with an auxiliary combustion device that integrates the two via a support leg 4, a plurality of arc-shaped holes 5 are formed in the center of the combustion ring 3 to form a blue flame cap mounting portion 4a. The end of the arc-shaped cutting line 6 forming the inner edge of the combustion ring 3 corresponding to the arc-shaped hole 5 is made continuous with the end of the adjacent arc-shaped hole 5, and the arc-shaped cutting line 6 is cut out. A constant interval is formed between the combustion ring 3 and the blue flame cap 2 by drawing while holding the combustion ring 3 and pressing the central blue flame cap mounting portion 4a. By fixing the blue flame cap 2 to the pot, an auxiliary combustion device for a pot type oil combustor is manufactured.

[0008]

According to the present invention having the above-described structure, the support leg 4 is formed by using the center hole of the combustion ring 3, so that the support leg 4 is not formed toward the center of the center hole, but is formed. An arc-shaped support leg 4 is formed along the inner edge, and a single blue flame cap mounting portion 4a shared by a plurality of arc-shaped support legs 4 is formed at the center of the central hole. Even when the distance from the blue flame cap 2 is large, the support legs 4 can be formed integrally with the combustion ring 3 using the member of the center hole of the combustion ring 3.

[0009]

Next, the structure and manufacturing method will be described with reference to the drawings showing an embodiment. 1 is a pot having a number of small holes 1a in the peripheral wall, 2 is a circular blue flame cap located at the top of the pot 1, and 3 is a pot 1 below the blue flame cap 2.
A donut-shaped combustion ring 4 is provided for connecting the blue flame cap 2 and the combustion ring 3 to each other.
A book is appropriate.

In the present invention, the blue flame cap mounting portion 4a for fixing the blue flame cap 2, the combustion ring 3 and the support legs 4 are processed by a single metal plate. In order to use a metal plate having a diameter of 8 mm and an outer diameter of 83.6 mm, and to make the center of the metal plate a blue flame cap mounting portion 4a, three arc-shaped holes 5 with a width of 3 mm are drilled at a position 30 mm from the center and adjacent to the center. About 8 mm of a non-hole is left between the hole 5 and the arc-shaped hole 5.

Next, an arc-shaped cutting line 6 which is the inner diameter of the combustion ring 3 is formed at a position 50 mm from the center, and a continuous portion of about 8 mm is left between the adjacent arc-shaped cutting line 6 and the circle. The end of the arc-shaped cutting line 6 and the end of the adjacent arc-shaped hole 5 are made continuous. In this manner, the combustion ring 3, the arc-shaped support leg 4 having a width of about 7 mm, and the blue flame cap mounting portion 4a at the center are formed by the arc-shaped hole 5 and the arc-shaped cutting line 6 formed by the cutting process.
It is formed by the material of one combustion ring 3.

Next, when the blue flame ring mounting portion 4a is pushed out from one side by pressing the blue flame cap mounting portion 4a from one side while the combustion ring 3 is fixed, the support leg 4 is extended, and when a further force is applied, a predetermined force is applied. It is formed to a height of about 37 mm as shown in the lower diagram of FIG. After this drawing, the blue flame cap mounting part 4
a and the blue flame cap 2 are spot-welded and integrally processed.

Reference numeral 8 denotes a locking portion cut and raised in the combustion ring 3 at several places. Reference numeral 7 denotes a pin protruding from the peripheral wall of the pot 1 into the pot 1. The locking portion 8 is cut and raised when the combustion ring 3 is pulled out. Preferably, the locking portion 8 engages with the pin 7 provided on the pot 1. Reference numeral 9 denotes a projection provided on a blue flame cap mounting portion 4a used when the auxiliary combustion device is removed from the pot 1 or the like. It protrudes from the cut hole 9a provided and also serves as a position for the blue flame cap 2 during spot welding.

Reference numeral 10 denotes a blower for supplying combustion air to the pot 1, reference numeral 11 denotes an oil supply pipe for supplying fuel to the pot 1, and reference numeral 12 denotes a preheating / ignition heater provided at the bottom inside the pot 1. A large number of small holes 1a formed in the peripheral wall of the pot 1 have a larger opening ratio around the blue flame cap 2 than other portions, thereby forming a premixed combustion type pot combustor.

[0015]

Since the present invention has the above-described configuration,
Conventionally, a plurality of parts were individually processed and then assembled by spot welding at several places. However, if processed as in the present invention, two parts of a blue flame cap 2 and a combustion ring 3 assist combustion. Since the apparatus can be integrally configured, it is possible to greatly reduce costs and man-hours without wasting used materials.

Further, since the support leg 4 is formed along the inner edge of the combustion ring 3, it can be extended longer than when the support leg 4 is formed toward the center of the center hole of the combustion ring 3. 4 can be arbitrarily processed, and the length of the support leg 4 can be appropriately selected as required in design.

When the support leg 4 is stretched by drawing, a twist is naturally generated.
Even those having a thickness of about 8 mm have sufficient strength, and durability can be expected if a heat-resistant and corrosion-resistant material is used.

Furthermore, in the conventional product, a blue flame cap mounting portion is provided at each tip of the support leg 4 to form a spot welding margin, but in the present invention, a blue hole is formed at the center of the central hole of the combustion ring 3. Since the flame cap mounting portion 4a is formed and the blue flame cap mounting portion for each supporting leg 4 is integrated into one, the arc-shaped supporting leg 4 is not bent by bending, but is fixed at a predetermined interval from the combustion ring 3 by a drawing method. In this case, the blue flame cap mounting portion 4a can be positioned, the process is simplified, the accuracy is improved, and the automation of the manufacturing process can be promoted.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a combustion assist device according to the present invention.

FIG. 2 is a plan view during processing of a part (combustion ring) constituting the present invention.

FIG. 3 is a sectional view of a main part of a pot type oil combustor equipped with the product of the present invention.

FIG. 4 is a sectional view of a burner portion of a pot type oil combustor showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pot 2a Small hole 2 Burning cap 3 Burning ring 4 Support 4a Arc-shaped hole 5 Arc-shaped hole 6 Arc-shaped cutting line

Claims (2)

(57) [Claims] 1. A large number of small holes 1a are formed in a peripheral wall of a pot 1, a disc-shaped blue flame cap 2 is positioned in an upper portion of the pot 1, and a combustion ring 3 is provided on a peripheral wall of the pot 1 below the blue flame cap 2. In a pot type oil combustor provided with an auxiliary combustion device in which the combustion ring 3 and the blue flame cap 2 are integrated via a support leg 4, a plurality of circular arcs are formed along the inner edge of the central hole of the combustion ring 3. And a blue flame cap mounting portion 4a of the support leg 4 is formed at the center of the central hole.
The arc-shaped support leg 4 has one end connected to the combustion ring 3 and the other end connected to the blue flame cap mounting portion 4a, and a continuous portion with the combustion ring 3 is bent upward to form a continuous portion with the blue flame cap mounting portion 4a. , And the supporting legs 4 hold the combustion ring 3 and the blue flame cap 2 at a constant interval. 2. A large number of small holes 1a are formed in the peripheral wall of the pot 1, a disc-shaped blue flame cap 2 is positioned in the upper part of the pot 1, and a combustion ring 3 is provided on the peripheral wall of the pot 1 below the blue flame cap 2. In a pot-type oil combustor provided with a combustion assist device in which the combustion ring 3 and the blue flame cap 2 are integrated via the support legs 4, a blue flame cap mounting portion 4 a is formed at the center of the combustion ring 3. A plurality of arc-shaped holes 5
And the end of an arc-shaped cutting line 6 corresponding to the arc-shaped hole 5 and forming the inner edge of the combustion ring 3 is connected to the end of the adjacent arc-shaped hole 5, and the arc-shaped cutting line 6 is Along with forming by cutting, the drawing process of holding the combustion ring 3 and pressing the center blue flame cap mounting portion 4a,
A method of manufacturing a pot-type petroleum combustor combustion assisting device in which a fixed interval is formed between the combustion ring 3 and the blue flame cap 2, and the blue flame cap 2 is fixed to the blue flame cap mounting portion 4a.