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1.发明授权Apparatus and method for starting and stopping a plasma arc torch used for mechanized cutting and marking applications 失效用于启动和停止用于机械切割和标记应用的等离子弧焊炬的装置和方法
公开(公告)号：US5760363A
公开(公告)日：1998-06-02
申请号：US707227
申请日：1996-09-03
摘要： A plasma arc torch apparatus and method for cutting or marking a workpiece includes a torch having an electrode and a nozzle coupled to a power supply, and a plasma gas source coupled to a fluid line for delivering plasma gas to the torch. A flow restriction member is disposed in the fluid line adjacent the torch and causes the pressure of the plasma gas in the torch to gradually increase during start up thus creating a stable plasma arc. A three-way valve is disposed in the fluid line downstream of the flow restriction member and has an inlet, a torch outlet, and a vent outlet. The inlet is in fluid communication with the torch outlet for delivering plasma gas to the torch when the valve is in the open position, and the torch outlet is in fluid communication with the vent outlet when the valve is in the vent position, for rapidly dissipating the gas in the plasma chamber of the torch to atmosphere after the arc has been extinguished. The rapid reduction of the gas pressure in the torch reduces the cycle time, enabling the torch to be restarted more quickly after completion of a prior cutting cycle.
摘要翻译： 用于切割或标记工件的等离子弧焊枪装置和方法包括具有连接到电源的电极和喷嘴的焊炬以及耦合到用于将等离子体气体输送到割炬的流体管线的等离子体气体源。 流动限制构件设置在与割炬相邻的流体管线中，并且在启动期间使得手电筒中的等离子体气体的压力逐渐增加，从而产生稳定的等离子体电弧。 三通阀设置在流动限制构件下游的流体管线中，并具有入口，火炬出口和排气口。 入口与火炬出口流体连通，当阀门处于打开位置时，将等离子体气体传送到割炬，当阀门处于通风位置时，火炬出口与排气口处于流体连通状态，以快速消散 火炬等离子体中的气体在电弧熄灭后到大气中。 手电筒中气体压力的快速降低减少了循环时间，从而能够在完成先前的切削循环之后更快地重新启动割炬。
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2.发明授权
公开(公告)号：US5635088A
公开(公告)日：1997-06-03
申请号：US368626
申请日：1995-01-04
CPC分类号： H05H1/28 , H05H2001/3457
摘要： A liquid cooled plasma arc cutting torch system includes a plasma arc torch, a torch receptacle and a cooling system. The torch is removably mounted to the receptacle. The cooling system includes a liquid storage tank, supply and return lines providing fluid communication paths between the tank and the receptacle and a pump for pumping the cooling liquid from the tank through the supply line, the receptacle, the torch and the return line. A valve coupled to the return line includes a nozzle that directs liquid toward an inside top surface of the tank. A flow restriction member may be provided to equalize pressure in the supply with atmospheric pressure when the pump is not operating. A pressurized gas source may be utilized to substantially clear the receptacle, torch and return line of liquid when the pump is not operating.
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