First, today's society, the majority of the gas has become an indispensable urban energy products , gas stove , gas water heaters and even gas cooker , gas oven , gas stove , etc., have approached the family of ordinary people , greatly facilitate the lives of urban residents , improve people's quality of life. However , the gas has been plagued by security vendors , gas appliance manufacturers and customers , they are prepared to spend a lot of effort to take various measures to ensure the safe use of gas . For example : gas supplier to take safety publicity , requiring the use of gas after gas users to achieve " two off and on ," arrange for professionals to security checks at least once a year ; social individuals have invented a variety of security assistive devices , such as " gas pipeline multifunctional stove valve " [ 1 ] , " mechanical valve timing switch safety device " [ 2 ] , household gas stove pipe valve Reminder [ 3 ] ; countries in 2007 issued a" gas cookstove with "the new standard , clearly states: since may 1, 2008 onwards , companies must not reproduce without flame protection function of the stove , from February 1, 2009 onwards, the market can not be resold without flame protection function of the stove . However, due to various reasons, accidents caused by gas leaks have occurred, to the people 's lives and property caused unnecessary losses.
Second, indoor gas stove hose is the weak link in the system
National news media have reported that due to a gas leak caused the gas explosion accidents, many reasons , mainly: ( 1 ) domestic gas pipeline system due to corrosion caused by age-old disrepair leak ; ( 2 ) through the use of domestic gas appliances life and extended "service " resulting in leakage caused by aging components ; ( 3 ) stove hose because of the age of aging , small animal bite and the user can not do two off and on as a result of gas leakage . Many reasons , the domestic gas with gas stove hose leaks, causing the accident majority. Users use of gas is completed, despite the propaganda of the gas company to " two off and on ," but most families can not do these security measures.
Gas stove valve manifold with hose in the binding site that controls the flow of gas hose . The current general use of the stove valve plug before and after use to be opened and closed manually by the user , but the user is easy to forget to turn off after use . Gas use, once the valve is not closed stove , household gas appliances and gas stove hose filled hose is weak gas system , is the main source of the gas leak .
Third, new gas stove safety aids
In order to address the user forgets to turn off the stove valve and the hose is damaged, aging gas leak problem , I developed a new safety trial assistive devices .
Auxiliary device is a new safety and the original stove stove transformed from a simple valve . Currently on the market that comes with a gas stove or two solenoid valves.
( A ) comes with a solenoid valve on the gas stove , the transformation , the need of the original traditional plug ( stove valve ) replace the solenoid valve , while the original solenoid valve solenoid valve connected in parallel with the stove , the original circuit is also slightly altered . After transformation, the unit circuit diagram shown below.

Work process: circuit K1, K2 chain , K1 is closed , K2 open , ignition work , ignition needle work , the solenoid valve 2 ( stove valve ) opens the solenoid valve 1 is closed , capacitor charging , gas into the stove, the burner fire cover is ignited at the thermocouple is heated, generate thermoelectric power , the solenoid valve 1 opens. Disconnect the K1, K2 also closed off instantly , capacitive power supply to the solenoid valve 2 , so as to continuously power and remain open , K1 is disconnected, the ignition end , K2 is closed, the thermoelectric power simultaneously to a solenoid valve and the solenoid valve 2 power supply, so that the two open simultaneously , stove work properly ; stove flame , the two solenoid valves simultaneously energized , closed , disconnect gas line to complete the work process . At this time there is no stove hose higher due to the gas pressure, so , even if it will not cause a lot of damage to the hose of the gas leak , thereby reducing the damage caused by the hose due to gas leakage and other accidents .
Revamping the solenoid valve when the choice of the types are: single coil , normally closed direct acting solenoid valves. Principle: power, the electromagnetic coil of electromagnetic force to lift the closure of parts from the valve seat , the valve opens ; power, the electromagnetic force disappears , the spring of the closure member against the valve seat , the valve closes.
Its characteristics are in a vacuum , negative , zero pressure to work properly, the path is generally not more than 25mm.
Technical parameters are as follows :
Open valve current = 100mA
Closing valve current = 20mA
Resistance (20 � C) 20 � 15% mO
Full compression spring force 3N � 10%
Operating temperature range -10 ^oC - 120 ^oC
Internal leakage tightness pressure 1.0kpa and 15kpa leakage <0.03L / h
Leakage flow pressure 15kpa leakage <0.02L / h
( Two ) comes with two solenoid valves for gas cooker , the change is relatively simple , the stove solenoid valve on the intake manifold hose before the move to front , making the stove valve while connecting wires to extend the original can be. This modification is more likely stove , it does not increase the burden on the user .
IV Conclusion
Through the transformation of the original stove and piping made ​​of a new gas cooker security auxiliary device through the test , were able to secure the hose to ensure the realization of the stove , but because of the total commitment stove solenoid valve function , therefore , the choice of solenoid valve specifications to meet the gas requirement on the solenoid valve . Meanwhile, the device only play a supporting role , can not entirely replace the gas company 's safety publicity , periodic screening , and hose selection . This device associated with the current invention , compared with a simple, practical, safe and reliable . Because stove inside transformation after transformation stove need to meet " domestic gas with " GB16410-2007 standard and gas gas company security requirements .