| 摘要 |
<p>An embodiment of the present invention relates to a cooling water blocking device of a welding machine. The purpose of the present invention is to minimize leak of cooling water and increase reliability of removing cooling water by more efficiently removing cooling water and remaining pressure from a pipe of a welding machine. According to the embodiment of the present invention, the device for blocking cooling water of a welding machine which includes a first cooling water inflow line, a compressed air supply line, a second cooling water inflow line, a cooling water line, and a cooling water discharging line comprises: a water-air switching valve unit which includes a first electronic switching valve installed on the first cooling water inflow line to be opened and closed according to the output state of a first control signal and a second electronic switching valve installed on the compressed air supply line to be opened and closed according to the output state of a second control signal; a third electronic switching valve which is installed on the second cooling water inflow line, is opened and closed according to a output state of a third control signal, and discharges a remaining pressure; and a controller which controls the first control signal, the second control signal, and the third control signal depending on the flow of cooling water and replacement of a cap tip.</p> |
