JPS5924323B2 - Lifting prevention structure in gas burner cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a gas burner cap.

One of the most important things in gas burners is prevention of lifting.

Conventionally, lifting was prevented by adjusting the amount of air according to the composition of the gas.

However, in recent years gas standards are being changed from 6B and 6C to 13A, and in the 13A standard, the amount of air must be significantly reduced to prevent lifting, making it impossible to avoid deterioration in combustion efficiency. There wasn't.

Therefore, as in the gas burner described in Utility Model Publication No. 49-12375, a circulating vortex is formed by a cover with an annular groove along the outer periphery of the lower surface to prevent lifting without reducing the amount of air. There is something I did.

However, with this gas burner, when holes were drilled from the outer periphery, the cutting edge of the cutting drill slipped along the cutting surface, resulting in poor processing accuracy.

Moreover, since the cover and the head with the gas outlet are not integrally molded and are connected by screwing together, eccentricity in the threaded part due to machining errors and aging may cause the cover to There was a risk that a problem would occur in the positional relationship with the gas outlet.

Therefore, there was a drawback that a uniform lifting prevention effect could not always be performed.

As a result of extensive research into the conventional gas burner described above, the inventor has completed a gas burner that is extremely effective in preventing lifting.

The present invention will be described below with reference to embodiments shown in the drawings.

Fig. 1 shows a longitudinal section of a gas burner 1 manufactured according to the present invention. In the figure, 2 is a cap, 3 is an outer cylinder, 4 is an inner cylinder, 5 is an air volume adjustment ring, and 6 is a lock nut. be.

The outer cylinder 3 has a nozzle insertion screw 7 at the lower end, a first air supply hole 8 and a second air supply hole 9 on the lower circumferential surface, and has a partition wall 10 separating the holes 8 and 9 inside. The inner tube 4 is inserted into the tube 10.

The air adjustment ring 5 has a hole 11 formed in its circumferential surface at a position and size corresponding to the second air supply hole 9, and by rotating the air amount adjustment ring 5, the hole 11 is connected to the second air supply hole 9. Appropriately changing the area of the hole formed by the supply hole 9,
This adjusts the amount of air supplied.

Cap 2 of gas burner 1 manufactured according to the invention
, a circumferential groove 12 is formed on the outer periphery of a cylindrical body, and a flame hole 13 is bored in the downward direction of the circumferential groove. The flange 16 is arranged to extend over the lower peripheral edge 15 of the umbrella part 14 formed at the upper part of the circumferential groove 12, and the diameter of the flange part 16 formed at the lower part of the circumferential groove 12 is made larger than the diameter of the umbrella part 14. .

A method for manufacturing the cap 2 will be explained with reference to FIG. 2.

First, one side of the material (see Figure 2 ■) is machined using a lathe to form a recess 17 into which the outer cylinder 3 is fitted and a step 18 to be placed on the outer cylinder 3 (see Figure 2 ■). reference).

Next, a hole 13' is bored outwardly and downwardly from the corner of the recess 17 using a drill press (see FIG. 2), and then the circumferential groove 12 is cut using a lathe (see FIG. 2).

In this way, in the present invention, the hole 13 can be drilled by bringing the cutting edge of the cutting drill into contact with the corner.

Therefore, the edge of the cutting drill is guided by the corner, and the flame hole 13 can be drilled extremely accurately at the center of the material.

Next, the circumferential surface of the umbrella portion 14 is cut to an appropriate diameter using a lathe.

In the above processing, what is particularly important is to cut the circumferential groove 12 after drilling the hole 13. In this way, there will be no burr on the edge of the circumferential groove 12 of the flame hole 13, and therefore the circumferential groove There is no need to rework 12.

The cap 2 thus formed has its recess 17 fitted into the upper part of the outer cylinder 3, and its stepped part 18 is brought into contact with the upper end of the outer cylinder 3 for connection.

The gas burner manufactured according to the present invention ejects gas from a nozzle (not shown) inserted into a screw 7 provided at the lower end of the outer cylinder 3, mixes it with air flowing in from the first air supply hole 8, Further, after passing through the inner cylinder 4, the second air supply hole 9
The mixture is mixed with air flowing in from the flame port 13 and ejected from the flame port 13.

Part of the air mixture gas (burning) ejected from the flame port 13 hits the umbrella part 14, and part of it hits the circumferential groove 12.
The remaining part reflected from the umbrella part 14 is reflected to the flange part 16. As a result of this, the overall momentum is alleviated and the lifting phenomenon is prevented.

The cap manufactured according to the present invention completely prevents lifting as described above, and since the entire cap is made of a single piece of material, it is extremely accurate compared to conventional caps made of two parts. is high,
The direction in which the flame hole is drilled remains unchanged and the flame hole does not deform, making it possible to achieve stable combustion and a lifting prevention effect over a long period of time.

Note that caps of the present invention that have the same structure and the diameter of the cap and brim are also effective in preventing lifting, but caps with the brim having a diameter larger than the diameter of the cap have
Furthermore, it was confirmed that the effect was remarkable.

In the present invention, since lifting can be completely prevented as described above, the amount of air supplied can be increased and complete combustion of gas can be achieved.

Therefore, for example, it is possible to fully cope with gas of standard 13A.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a gas burner according to the present invention, and FIGS. 2-2 are diagrams illustrating the processing order of the cap. 1...Gas burner, 2...Cap, 3...Outer cylinder, 12...Peripheral groove, 13.
... Flame hole, 14 ... Umbrella part, 15 ...
... lower periphery, 16 ... collar.

Claims (1)

[Claims] 1. A recess for fitting the outer cylinder is formed on the upper surface of the material of the gas burner cap, and holes are drilled radially outward and downward from the corners of the recess, and the surroundings of the material to be filled in the holes are is cut to form a circumferential groove, the tip of the hole is opened by the circumferential groove to form a flame hole, and then the umbrella portion formed by the circumferential groove is cut to a predetermined diameter to open the flame hole. A method of manufacturing a cap for a gas burner, characterized in that a part of the extended surface of the hole is formed so as to hang over the lower peripheral edge of the umbrella part.