| 摘要 |
The present invention pertains to a gas leakage preventing device, wherein the operation of a gas opening and closing valve is controlled according to the combustion state of a gas operation device and the gas supply is blocked if normal ignition is not carried out. The gas leakage preventing device includes: an opening and closing valve mounted in a gas supply pipe and connected to a motor so as to supply or block gas with respect to a gas operation device; a cam driving section connected to the motor and having cam A and cam B; and a motor circuit section for supplying power to the motor by at least one or more of a first motor circuit, a second motor circuit or a third motor circuit. The first motor circuit has a cam A switch for operating by cam A; a pressure switch mounted between the opening and closing valve and the combustion section of the gas operation device so as to operate by the pressure in the gas supply pipe; and a cam B switch (1) for operating by cam B. The second motor circuit has a cam A switch and a cam B switch (1). The third motor circuit has a cam A switch and a cam B switch (2) for operating by cam B. Therefore, the valve for supplying gas to the gas operation device is completely closed if the normal ignition is not carried out in the combustion section of the gas operation device, so that it is possible to inherently prevent the gas leakage phenomenon via the combustion section, the pipe, the connection portions or the like of the gas operation device, thereby preventing gas explosion in advance. |
