Fire fighting lance with electric shock prevention function

2011 
The utility model relates to a fire fighting lance with an electric shock prevention function, which comprises a lance body. A detecting control circuit is arranged on the lance body and provided with a diode D1, a diode D2 and a diode D3 which form a signal sampling circuit. When an attached article is electrified, a full water spout ejected from the lance generates voltage drop on the diodes, voltage on a negative pole of the diode D1 is clamped at around 1.2V by the diode D2 and the diode D3, the detecting control circuit also consists of an IC (integrated circuit), a resistor R1, a resistor R2, a resistor R3 and the like which form a voltage comparison circuit, the resistor R1 and the resistor R2 provide reference voltage which varies around 1V, and when a positive end of the IC detects a voltage signal around 1.2V, a voltage comparator outputs high level. The fire fighting lance is suitable for fire fighting, and has the advantages of novel style, scientific design, reasonable structure, high safety and convenience in operation.
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