Safety device for a gas valve

Abstract

A safety device for a gas valve includes a valve seat, a valve cap, a press bar, an electronic valve, and a thermocouple. The valve cap comprises a passage interconnected with a main gas channel and a gas ignition channel. The passage is formed with a neck. A valve body provided in the gas ignition channel comprises a push bar. The press bar and the electronic valve are disposed at respective sides of the neck. When the press bar is pushed to engage with the neck, an elastic block provided on the electronic valve retreats from the neck and a switch plate provided on the elastic block moves simultaneously to push the push bar of the valve body upward so as to open the gas ignition channel.

1 . A safety device for a gas valve comprising: 
 a valve seat, said valve seat comprising a main gas channel;    a valve cap secured to said valve seat, said valve cap comprising a gas ignition channel and a valve body controlling the opening and closing of said gas ignition channel;    a press bar disposed in said valve cap;    an electromagnetic valve, said electromagnetic valve comprising an elastic block at one end, said elastic block being controlled by said press bar and said electromagnetic valve to move;    a thermocouple, said thermocouple being secured to outside of said valve cap and connected with said electromagnetic valve, and characterized in that:    said valve cap comprising a passage to interconnect with said main gas channel and said gas ignition channel, said passage being formed with a neck, said valve body in said gas ignition channel comprising a push bar extending into said passage, said press bar in said passage having one end to engage with or retreat form said neck, said electromagnetic valve being secured to another end of said passage, said elastic block of said electromagnetic valve being to engage with or retreat from said neck, wherein the movement of said elastic block links said push bar of said valve body to control the opening and closing of said gas ignition channel.    
   
   
       2 . The safety device for a gas valve, as recited in  claim 1 , wherein said elastic block of said electromagnetic valve comprises a switch plate in an undulate shape, said switch plate contacting with said push bar of said valve body.  
   
   
       3 . The safety device for a gas valve, as recited in  claim 1 , wherein said press bar is transversely disposed in said valve cap, and said valve seat and said valve cap are formed with threaded holes around circumferential edges to receive fasteners therein for secure purpose, said valve cap may be swung to change its position in relation to said valve seat to change the position of said press bar.