JPS60101420A - Igniter of gas burner - Google Patents

Abstract

PURPOSE:To enable safe and reliable ignition of a main burner, by a method wherein a pilot burner pipe in a gas burner ignited by spark is branched from a main burner pipe, and a pilot flame is formed by spark-igniting gas fed through an opening for pilot flame. CONSTITUTION:A pilot burner pipe 2 is branched from a main gas burner pipe 1 through which gas is guided to a main burner 3, and a pilot nozzle 9 through which gas is injected toward the combustion range of the main burner is formed at the pilot burner pipe 2. An opening 5 for pilot flame, through which gas from the pilot burner pipe 2 flows out, is located in the vicinity of the forward end of the pilot nozzle 9. By spark-igniting gas through the opening 5 for pilot flame, gas through the pilot nozzle 9 is ignited, and the main burner 3 is ignited by means of such flame. The forward end of the pilot burner pipe 2 is throttled to form a throttle opening serving as the pilot nozzle 9, and the opening 5 for pilot flame is formed in the side wall of such throttled part. A side wall 12 part between the opening 5 for pilot flame and the throttle opening is used as an electrode for spark ignition, and this enables ignition of a pilot flame and ignition of gas injected through the pilot nozzle.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to an ignition device for a gas burner that ignites a main burner using a pilot flame ignited by a spark.

[Prior art and its problems]

2. Description of the Related Art Conventionally, as an ignition device for a gas burner, a method is known in which a pilot flame is generated by spark discharge and the pilot flame is used to ignite the person. However, with this method, if the outflow gas on the person's side forms rapidly, there are problems with the reliability of ignition, such as the fact that the pilot flame alone does not reach the ignition temperature and is difficult to ignite, and the pilot flame may be blown out. . In addition, if there is an ignition error, the fuel gas may flow out with incomplete combustion, and there is a risk of ignition and explosion upon re-ignition.

[Purpose of the invention]

In view of the above points, an object of the present invention is to provide a safe and highly reliable gas burner ignition device that has a simple structure and can reliably ignite the main burner.

[Key points of the invention]

According to the present invention, in a gas burner ignition device that ignites a main burner with a pilot flame ignited by a spark,
A pilot burner pipe is branched from a main gas burner pipe that leads gas to the main burner, and a pilot nozzle is provided in the pilot burner pipe to blow out gas toward the combustion area of the gas by the main burner. A pilot opening is provided through which the gas from inside the pilot burner pipe flows out, and by igniting the gas from the pilot opening with a spark, the gas blown out from the pilot nozzle is ignited, and the flame from the ignited pilot nozzle is further ignited. This is achieved by allowing the main burner to ignite.

Furthermore, in the present invention, the pilot nozzle is formed as a throttle opening at the tip of the pilot burner tube, a pilot flame opening is provided in a side wall of the throttle part, and a side wall portion between the pilot flame opening and the throttle opening is used for spark ignition. By being used as an electrode for this purpose, it is effective in igniting the pilot flame and also in igniting the gas blown out from the pilot nozzle.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Figures 1 and 2 are a partially cutaway front view and an enlarged sectional view of a main part of a gas burner ignition device showing an embodiment of the present invention, and this gas burner ignition device is used in a rail point automatic snow melting device. It is. Reference numeral 1 designates a main gas burner pipe. The main gas burner pipe 1 is formed in an L shape, and a main burner burner 3 (hereinafter referred to as the main burner) is provided at the opening end, and a fuel gas line is connected to the L-shaped bent part. A pilot burner pipe 2 is branched and connected. This pilot burner pipe 2 is curved in the middle part, and is parallel to the upper part of the main gas burner pipe 1 so that a pilot nozzle 9 formed as a throttle opening at the tip blows out gas toward the combustion area of the gas by the main burner 3. It is arranged in such a way that Further, a pilot flame opening 5 is provided in the side wall 12 of the end constriction portion of the pilot burner tube 2 in the vicinity of the pilot nozzle 9 through which gas from the pilot burner tube 2 flows out. Side wall 12 of the constriction part between the pilot nozzle 9
A spark discharge surface 6 is formed, a portion of which is used as an electrode for spark ignition.

4 is an ignition plug, the ignition plug 4 is arranged at a predetermined interval at a position facing the spark discharge surface 6, and the pilot opening 5 is a spark discharge 7 generated between the ignition plug 4 and the spark discharge surface 6. It is set to emit a sufficient amount of gas to ignite.

Next, the ignition order for the main burner 3 will be explained.

By operating the main valve (not shown), a separately provided fuel gas supply valve opens, and fuel gas flows out from the pilot opening 5, the pilot nozzle 9, and the main burner 3. At the same time, an ignition device (not shown) operates, and the spark plug 4 and the spark discharge surface 6 are activated.
A spark discharge 7 is generated between the two, and the spark discharge 7 ignites the fuel gas flowing out from the pilot flame opening ``5'' to create a pilot flame 8. The pilot flame 8 instantaneously ignites the fuel gas flowing out from the pilot nozzle 9 to create a medium flame, and the medium flame 10 turns into an elongated flame and directs it toward the gas outflow direction of the main nozzle 3. Then, the fuel gas flowing out from the main nozzle (3) is instantly ignited to form the fuel gas (11), and full-scale combustion begins.0 In addition, the main valve (not shown) is operated. As a result, the above-mentioned gas supply valve is closed, the fuel gas to the main burner 3 and the pilot burner pipe 2 is cut off, and the pilot flame 8, medium flame 10, and person 11 are extinguished. As described above, the invention includes a main gas burner pipe that directs gas to a main gas burner, and a pilot pipe (branched from the main gas burner pipe, mainly connected to the pilot pipe) that directs gas toward the combustion area of the gas by the burner. A pilot nozzle for blowing out is provided, and a pilot opening is provided at the end of the pilot nozzle through which gas from inside the pilot burner pipe flows out, and a spark ignites the gas from the pilot opening. By starting a pilot flame, the gas blown out from the pilot nozzle is ignited to create a medium flame, and the main burner is ignited by the flame from the ignited pilot nozzle. It is possible to provide a safe and highly reliable gas burner ignition device that eliminates burner ignition errors and incomplete combustion.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, FIG. 1 is a partially cutaway front view of the ignition device of a gas burner, and FIG. 2 is an enlarged view of section A shown in FIG. 1. main gas burner pipe,
2... Pilot burner pipe, 3... Main burner, 5...
...Pilot opening, 6...Electrode, 9...Pilot nozzle, 12...Side wall. Figure 1 Figure 2

Claims (1)

[Claims] 1) In a gas burner ignition device that ignites a main gas burner with a pilot flame ignited by a spark, a pilot burner pipe is branched from a main gas burner pipe that leads gas to the main gas burner, and the pilot burner pipe is branched from a main gas burner pipe that leads gas to the main gas burner. The main gasper is equipped with a pilot nozzle that blows out gas toward the firing area.
and providing a pilot opening near the tip of the pilot nozzle through which the gas from inside the pilot burner pipe flows out, and igniting the gas from the pilot opening with a spark to ignite the gas blown out from the pilot nozzle; A gas burner ignition device characterized in that a main burner is ignited by a flame from a pilot nozzle. 2. In the ignition device according to claim 1, the pilot nozzle is formed as a throttle opening at the tip of the pilot burner tube, and a pilot flame opening is provided in the side wall of the throttle part, and the pilot flame opening and An ignition device for a gas burner, characterized in that a side wall portion between the diaphragm opening and the diaphragm opening is used as an electrode for spark ignition.