JPS584022Y2 - gas burner - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of a gas burner.

A commonly used gas burner has a main gas nozzle and a pilot gas nozzle. First, a small amount of pilot gas jetted out from the pilot gas nozzle is ignited, and the flame causes a large amount of pilot gas jetted out from the main gas nozzle. The main gas is ignited, and the pilot gas is ignited using an electric ignition method, which prevents the ignition electrode from being damaged early by the combustion flame of a large amount of gas ejected from the main gas nozzle. In order to prevent this, the pilot gas nozzle and ignition electrode are separated from the main gas nozzle.

For this reason, in conventional gas burners, the main gas delivery pipe and the pilot gas delivery pipe were separate systems, and safety gas shutoff valves were also provided separately, which resulted in a complicated structure and increased equipment costs. was there.

In order to eliminate these drawbacks, the present invention simplifies the structure by branching a single fuel gas delivery pipe inserted into the outer tube into a main gas delivery pipe and a pilot gas delivery pipe at the tip. The present invention provides a gas burner that reduces equipment costs and provides stable combustion by providing a pilot gas ejection hole and an electrode behind a main gas header attached to the tip of a main gas delivery pipe.

An embodiment of the present invention will be described with reference to the drawings. At the tip of the fuel gas delivery tube 2 inserted into the outer tube 1, a plurality of pilot gas injection holes 3° 3...3 are provided at the outer edge of the tip surface. At the same time, an L-shaped main gas delivery pipe 5 is branched at the base end of the pilot gas delivery pipe 4, and an end plate 6 is attached to the tip of the main gas delivery pipe 5. A main gas header 8 having a supply pipe section 7 is connected to the outer edge of the main gas header 8 , and the main gas delivery pipe 5 is connected to the supply pipe section 7 . It is located inward.

9.9...9 is a large number of main gas ejection holes bored on the outer periphery of the supply tube-shaped portion 7.

Reference numeral 10 denotes a flame protection tube connected to the tip of the pilot gas delivery pipe 4, which has a through hole 11 bored in its outer periphery and has its tip opened behind the main gas header 8.

Reference numeral 12 denotes a base body connected to the base end of the outer pipe 1, into which the base end of the fuel gas delivery pipe 2 is screwed, and the base body 12 is connected to the base body 1 through the communication path 13.
It communicates with a fuel gas inlet 14 provided on the outer periphery of 2.

Reference numeral 15 denotes an electrode insulator, which is inserted into the pilot gas delivery pipe 4 so that its tip small diameter portion 15a protrudes from the front end of the pilot gas delivery pipe 4, and an ignition electrode 16 is attached to the tip of the small diameter portion 15a.
At the same time, a conductive rod 17 is connected to the tip of the electrode insulator 15 and inserted into the fuel inlet pipe 2, and the rear end is connected to the terminal 1.
8 to an appropriate power source (not shown).

Reference numeral 19 designates a ground electrode protruding from the inner circumferential surface of the flame protection cylinder 10 in close proximity to the tip of the ignition electrode 16, and reference numeral 20 represents a combustion air supply pipe provided separately at the base end of the outer tube 1.

To explain the operation of the above embodiment, a part of the fuel gas fed into the fuel gas delivery pipe 2 from the fuel gas inlet 14 through the communication path 13 provided in the base body 12 is transferred to the pilot gas delivery pipe 4. The remaining part passes through the main gas delivery pipe 5 and flows into the supply tubular part 7 of the main gas header 8 as a large amount of main gas. The main gas is ejected from the main gas ejection hole 9 into the outer tube 1 .

At the same time, the combustion air fed into the outer tube 1 from the combustion air inlet pipe 20 passes between the outer tube 1 and the fuel delivery tube 2, and part of it passes through the through hole 11 provided on the outer periphery of the flame protection tube 10. Flame protection tube 1
The remaining combustion air flows between the inner periphery of the outer pipe 1 and the outer periphery of the main gas header 8 and mixes with the pilot gas ejected from the pilot gas injection hole 3. It mixes with the main gas ejected from the main gas ejection hole 9 mentioned above.

At this time, the terminal 18 is connected to an appropriate power source (not shown).
The ignition electrode 16 is energized through the conductor rod 17, and a spark is short-circuited between it and the ground electrode 19, and the pilot gas ejected from the pilot gas nozzle 3 and mixed with the combustion air is ignited and combusted. The pilot gas combustion flame ignites the main gas ejected from the main gas ejection hole 9 and mixed with the combustion air to combust a large amount of the main gas.

As mentioned above, in the gas burner of the present invention, the fuel gas is sent to a single fuel gas delivery pipe 2, and the fuel gas is divided into the main gas delivery pipe 5 and the pilot gas delivery pipe 4 at the tip of the delivery pipe 2. Because of this, there is no need to separate the main gas delivery pipe and pilot gas delivery pipe as in conventional gas burners, and the structure is simple and equipment costs can be reduced. By positioning the main gas header 8 behind the main gas header 8 connected to the tip of the main gas delivery pipe 5, stable combustion is always guaranteed without being affected by disturbances such as pressure fluctuations in the combustion chamber of the furnace body. Since the main gas ejection holes 9 are provided on the outer circumferential surface of the main gas header 8, they are not directly exposed to dust in the combustion chamber of the furnace body, and therefore misfires due to clogging by dust can be prevented.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a vertical side view, FIG. 2 is an enlarged sectional view of the main part, and FIG. 3 is a view taken along A--A in FIG.
It is a sectional view taken along the A line. 1... Outer pipe, 2... Fuel gas delivery pipe,
3...Pilot gas outlet, 4...
Pilot gas delivery pipe, 5... Main gas delivery pipe,
8... Main gas header, 9... Main gas ejection pipe, 16... Ignition electrode, 20...
Combustion air supply pipe.

Claims (1)

[Scope of utility model registration request] A main gas delivery pipe 5 and a pilot gas delivery pipe 4 are separated at the tip of the fuel gas delivery pipe 2 inserted into the outer tube 1, and a large number of main gas injection holes are provided at the tip of the main gas delivery pipe 5 on the periphery. 9
Connect the main gas header 8 having a hole therein, position the main gas header 8 appropriately inward from the open end of the outer tube 1, and ignite the pilot gas jet hole 3 provided at the tip of the pilot gas delivery pipe 4. A gas burner which is located behind the main gas header 8 together with the electrode 16, and further includes a combustion air inlet pipe 20 separated from the outer tube 1.