Flow adjusting valve for combustion gas

Abstract

A flow adjusting valve for combustion gas being provided with an air chamber between its air intake port and its air output port, the air chamber has an inlet connecting with the air intake port, and the air chamber is provided with a valve plug to block between the air intake port and the inlet, the valve plug is always kept at a position to close the inlet of the air chamber; when the electromagnetic device is electrically turned on, it generates a magnetic repulsion force against the permanent magnet to push the valve plug to open the inlet; when a transient pressure of combustion gas is larger than the magnetic repulsion force, the valve plug will close immediately, this can prevent the situation of gas leaking induced by overly large pressure of the gas supplied.

1 . A flow adjusting valve for combustion gas being provided with an air intake port for entering of combustion gas, an air chamber connecting with said air intake port and an air output port connecting with said air chamber for releasing said combustion gas, wherein:
 said air chamber has an inlet connecting with said air intake port, and said air chamber is provided with a valve plug having a diameter larger than that of said inlet to block between said air intake port and said inlet, a bottom of said valve plug is connected with a valve rod of which a bottom is extended to a tailing end of said air chamber, said bottom of said valve rod is provided with an air tight elastic diagram for sealing a bottom of said air chamber, said air tight elastic diagram is provided thereon with a permanent magnet; said air chamber is provided outside of it with an electromagnetic device that is in cooperation with said permanent magnet;   when said electromagnetic device is not operated, a magnetic attraction force is generated between said electromagnetic device and an iron core of said electromagnetic device, said valve plug is always kept at a position to close said inlet of said air chamber; when said electromagnetic device is electrically turned on, it generates a magnetic repulsion force against said permanent magnet to push said valve plug and said valve rod to open said inlet, thereby said combustion gas is released from said air output port after it enters said air chamber from said air output port and said inlet sequentially, and thereby degree of opening between said valve plug and said air inlet is adapted to being adjusted by controlling magnitude of said magnetic repulsion force generated by said electromagnetic device.   
   
   
       2 . The flow adjusting valve for combustion gas as in  claim 1 , wherein said air intake port and said air output port are provided on an upper housing, said upper housing is provided between said air intake port and said air output port with an engaging port to engage with a lower housing, said air chamber is provided on said lower housing and extends through the latter, in order that said inlet is on a top of said lower housing, said air tight elastic diagram is on a bottom of said lower housing. 
   
   
       3 . The flow adjusting valve for combustion gas as in  claim 1 , wherein said air intake port is provided on an upper housing, said upper housing is provided with an engaging port to engage with a lower housing, said air chamber is provided on said lower housing and extends through the latter, in order that said inlet is on a top of said lower housing, said air tight elastic diagram is on a bottom of said lower housing, and said air output port is provided on said lower housing to communicate with said air chamber. 
   
   
       4 . The flow adjusting valve for combustion gas as in  claim 3 , wherein said upper housing is further provided with a serially connecting port in communication with said air intake port, to be used to serially connect a combustion gas inlet of another flow adjusting valve for combustion gas. 
   
   
       5 . The flow adjusting valve for combustion gas as in  claim 1 , wherein said valve rod further has an elastic element which pushes said valve plug to keep the latter at a position to close said inlet. 
   
   
       6 . The flow adjusting valve for combustion gas as in  claim 1 , wherein said electromagnetic device further includes an iron core and a coil wound about said iron core, said coil makes said iron core generate magnetic poles of different strengths in pursuance of the magnitudes of electric fluxes. 
   
   
       7 . The flow adjusting valve for combustion gas as in  claim 6 , wherein a bottom of said iron core is exposed to outside of said electromagnetic device for adjusting distance between said iron core from said permanent magnet.