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Dual-air-source fuel gas ignition protecting device and work method thereof

A protection device and dual gas source technology, which can be used in gaseous heating fuel, heating fuel, household heating, etc., can solve problems such as danger, and achieve the effect of eliminating worries and saving electricity.

Active Publication Date: 2015-12-09
ZHEJIANG FUERJ ELECTRIC SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are a variety of gas supplies on the market. For example, there are liquefied petroleum gas and natural gas according to the high and low calorific value. The corresponding gas appliances are also divided into liquefied petroleum gas and natural gas. , and the two ignition ends are respectively connected to the corresponding pilot gas circuit branch, so that both high calorific value gas source and low calorific value gas source can be connected, but because of the difference in gas calorific value, the diameter of the gas nozzle using low calorific value gas is relatively large. Gas appliances with high calorific value gas are relatively large, so when low calorific value gas (such as natural gas) injects high calorific value gas (such as liquefied petroleum gas) into the nozzle by mistake, the flame produced by the gas appliance will be very high, which will cause danger

Method used

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  • Dual-air-source fuel gas ignition protecting device and work method thereof
  • Dual-air-source fuel gas ignition protecting device and work method thereof
  • Dual-air-source fuel gas ignition protecting device and work method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0067] Embodiment: The double gas source gas ignition protection device of the present invention is an important part of the safe dual gas source gas control system in this embodiment, such as Figure 1-27 As shown, a safe dual gas source gas control system includes a low calorific value regulator valve 1, a high calorific value regulator valve 2 and:

[0068] The switch control valve 3 is used as the main switch of the gas circuit to control the on-off of the gas circuit. It is connected to the low calorific value regulator valve 1 and the high calorific value regulator valve 2 respectively. Pilot gas gas path 6, the other is the main gas path 5 leading to the main burner 4, and the pilot gas path is switched to the high calorific value gas ignition end 7 or the low calorific value gas ignition end 8 through gear switching;

[0069] The high and low calorific value gas igniter ends 7, 8 each include an ignition needle 9a, 9b, a thermocouple 10a, 10b and an injection tube 11a,...

Embodiment 2

[0085] Embodiment 2: Different from Embodiment 1, as Figure 28 , 29 As shown, the lower end of the lower valve stem is cylindrical, and the diameter of the lower end of the lower valve stem is smaller than the diameter of the nozzle mouth. The nozzle opening changes the effective intake cross-sectional area of ​​the nozzle opening.

Embodiment 3

[0086] Embodiment 3: as Figure 30 , 31 As shown, in this embodiment, the lower end of the lower valve stem 27 is cylindrical, a plurality of air holes 35 are provided at the nozzle opening, and an O-shaped sealing ring 34 is set on the lower end of the lower valve stem. It is separated from the nozzle opening to keep all the air holes connected; while in the high calorific value gear, the lower valve stem moves down so that the lower end of the lower valve stem blocks one of the air holes so that the effective intake cross-sectional area of ​​the nozzle opening changes.

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Abstract

The invention discloses a dual-air-source fuel gas ignition protecting device and a work method thereof. The device comprises a high-heating-value fuel gas ignition end and a low-heating-value fuel gas ignition end. The high-heating-value fuel gas ignition end comprises a thermocouple and an injection tube suitable for high-heating-value fuel gas, and the injection tube is connected with one branch of a fuel gas ignition gas channel. The low-heating-value fuel gas ignition end comprises a thermocouple and an injection tube suitable for low-heating-value fuel gas, and the injection tube is connected with the other branch of the fuel gas ignition gas channel. Potentials are output according to the heating situation of the thermocouples after the positive and negative electrodes of the two thermocouples are reversely connected in series. By means of the location setting of the two thermocouples, flames of the injection tubes only heat the corresponding thermocouples to generate the potentials when fuel gas is correctly led into the ignition ends, and when the high-heating-value fuel gas is led into the low-heating-value fuel gas ignition end by mistake by the ignition ends, the flames heat the two thermocouples at the same time so that the output potentials offset each other or are weakened. Opening or closing of an air channel opening and closing control valve is controlled by whether the thermocouples generate effective thermal potentials in the ignition process or not, so that safety use is ensured.

Description

technical field [0001] The invention relates to the technical field of combustion heaters, in particular to a double gas source gas ignition protection device and a working method thereof. Background technique [0002] At present, there are a variety of gas supplies on the market. For example, there are liquefied petroleum gas and natural gas according to the high and low calorific value. The corresponding gas appliances are also divided into liquefied petroleum gas and natural gas. , and the two ignition ends are respectively connected to the corresponding pilot gas circuit branch, so that both high calorific value gas source and low calorific value gas source can be connected, but because of the difference in gas calorific value, the diameter of the gas nozzle using low calorific value gas is relatively large. Gas appliances with high calorific value gas are relatively large, so when low calorific value gas (such as natural gas) injects high calorific value gas (such as li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24C3/12
Inventor 罗建富赵学庆
Owner ZHEJIANG FUERJ ELECTRIC SCI & TECH