JPS6026278Y2 - Automatic ignition device for preheating burner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic ignition device for a preheating burner.

In order to prevent welding cracks in structures, we preheat them with a gas burner before welding, but in order to control the preheating temperature, we must ensure that the gas flame is turned on and off in a short time and frequently (
For example 0. It is necessary to do this once every □□□ for several hours continuously).

In addition to the durability of the device, there is also a need for the device to be built into a system that automatically turns on the ignition mechanism when gas flows, and automatically turns off when the gas flow stops.

An electrical ignition method is known as a publicly known technique for solving the above-mentioned problem.

For example, 1. The ignition mechanism of a household gas stove.

21 ignition mechanism attached to an industrial gas automatic cutting machine.

In either case, the repetition of ignition and extinguishing is not as frequent as on the left, and moreover, there is plenty of time between the activation of the ignition device and the ignition.

Ignition is therefore possible by gas diffusion even if the igniter is not directly in the gas stream (FIG. 1).

On the other hand, if there is an ignition device within the gas flow and the ignition device is permanently installed, there is a problem with its durability.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The known technology will be explained below with reference to the drawings, and then the present invention will be explained.

FIG. 1 shows the crater of a known gas cutting machine.

2 is the preheating gas, 3 is the cutting oxygen, and 4 is the preheating gas stream ignited by the igniter 5.

In this case, as described above, the ignition device 5 is not directly in the gas flow, but ignition is possible due to gas diffusion.

FIG. 2 shows the most commonly used burner for gas heating, which has a tip 6 surrounded by a cylindrical nozzle 7.

The nozzle 7 has an air suction hole 8 formed therein.

When this burner is supplied with flammable gas 9 and ignited, when the gas flow rate is large, a flame 10 starts near the tip of the nozzle 7, as shown in FIG. The figure shows a gas burner according to the present invention, which is equipped with an ignition device 11 that can be inserted into the nozzle 7.

Since the igniter 11 is within the combustible gas stream 12 in the nozzle 7, ignition is possible immediately upon actuation of the igniter 11.

Furthermore, since it is present in the combustible gas flow, it is not exposed to the flame that exists beyond the vicinity of the tip of the nozzle 7, so there is no problem in terms of the durability of the igniter.

FIG. 5 illustrates an example of the ignition system of the ignition device according to the present invention.

1 Microcomputer (hereinafter referred to as microcomputer) 1
Set the required heating temperature in step 4.

2. Measure the temperature of the heated object 13 with the thermocouple 16,
Turn on/off the solenoid valve 15 by comparing it with the set temperature of 1.
instruct.

In other words, the temperature of the object to be heated <the set temperature of the microcomputer - the electromagnetic
Luf ON Temperature of heated object> Microcomputer setting temperature → Electromagnetic valve 0
FF 3 When the electromagnetic valve 15 for the combustible gas 9 is ON, the combustible gas 9 flows into the nozzle, but at the same time, the microcomputer issues a high frequency generation instruction to a separately installed high frequency generator.
The ignition device 11 operates and ignites.

According to the present invention, since the ignition device operates at the same time as the combustible gas flows, heating can be performed for a short time (in units of 0.1 seconds).

Furthermore, since the ignition device can be inserted into the combustible gas flow, reliable ignition can be achieved at the same time as the gas flows.

Furthermore, since the ignition device is not exposed to flame, it is excellent in improving the durability of the ignition device.

[Brief explanation of the drawing]

Fig. 1 shows a crater in a known cutting machine, Fig. 2 shows a known gas heating burner, Fig. 3 shows the burner in Fig. 2 lit, and Fig. 4 shows a gas burner according to the present invention, The figure is an example of a gas burner ignition system according to the present invention. In the figure: 1... Crater, 2... Preheating gas, 3... Cutting oxygen, 4... Preheating gas flow, 5... Ignition device, 6... Chip, 7... Nozzle, 8... Air intake hole,
9...Flammable gas, 10...Flame, 11
...Ignition device, 12...Flammable gas flow,
14...Microcomputer-15...
...Solenoid valve, 16...Thermocouple.

Claims (1)

[Scope of utility model registration request] An ignition device is installed in a cylindrical nozzle, the ignition device is positioned in a combustible gas flow, a thermocouple is installed to measure the temperature of the combustible material, and the temperature measured by the thermocouple is inputted, and the preset settings are set. A preheating burner characterized by being provided with a microcomputer that instructs opening and closing of an electromagnetic valve for supplying combustible gas according to the temperature of a flavor liquid combustible material for comparison, as well as instructing the generation of a high frequency wave for operating the igniter. automatic ignition system.