Switching device for mode transition of DC plasma torches
AssigneeAtomic Energy Council-Institute of Nuclear Energy
InventorChin-Ching Tzeng
Life of this patent
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Abstract
The present invention obtains an automatic mode switching of DC plasma torches through, which easily switches DC plasma torches to be run between a transmitting mode and a non-transmitting mode and put the switching device under the monitor and the control of a current sensor and a current level controller; the heat generated by the current passing through can be transferred by a non-combustible liquid driven by a pump and be cooled down through a heat exchanger; and, electric arcs is prevented from happening between two electrodes by the non-combustible liquid.
Claims17
A switching device for a mode transition of DC plasma torches, comprising:
- a movable electrode unit, comprising a movable electrode, a conductive linking rod and a top output end-plate;
- a fixed electrode unit, comprising a fixed electrode and a bottom output end-plate;
- an insulating board with an end surface connected with an end of said conductive linking rod;
- a driver connected to another end surface of said insulating board;
- and
- an insulated chamber formed with an insulated top fixed sealing plate, a double-layer insulating sleeve and an insulated bottom fixed sealing plate, and sealed up with an O-ring;
- wherein said insulated chamber is filled with a non-combustible liquid inside and said non-combustible liquid is cooled down by being transferred by a pump to a heat exchanger and then being transferred back into said insulated chamber through said insulating sleeve;
- wherein, when said movable electrode is in touch with said fixed electrode, a current from an end of a DC power supplier is entered into a rear electrode of a plasma torch;
- then passes through a nozzle electrode of said plasma torch;
- then, through said top output end-plate, is transferred to said bottom output end-plate;
- and, is transferred to another end of said DC power supplier to form a circuit to make said plasma torch run in a non-transmitting mode;
- and
- wherein said current is detected by a current sensor and is transferred back to said DC power supplier;
- when said current reaches a setup value of a current level controller, said current level controller outputs a control signal to move said driver to separate said movable electrode and said fixed electrode by said non-combustible liquid to make said plasma torch run in a transmitting mode.
Dependencies are inferred from the claim text.