Fire prevention equipment and spraying method
Fire-extinguishing agent supplying equipment pressurizes a water-based fire-extinguishing agent and supplies the agent via a pipe; and the water-based fire-extinguishing agent is pressurized and supplied via the pipe to an electrification spray head installed in a protection area A, and the jetted particles of the fire-extinguishing agent are electrified and sprayed from the electrification spray head. A pulsed or alternating electrification voltage is applied to the electrification spray head from a voltage application unit 15 , and an external electric field generated by applying the voltage between a water-side electrode unit and an induction electrode unit is applied to the fire-extinguishing agent in a jetting process to electrify the jetted particles.
1. Fire prevention equipment comprising:
fire-extinguishing agent supplying equipment for pressurizing and supplying a water-based fire-extinguishing agent via a pipe;
an electrification spray head for electrifying jetted particles of the fire-extinguishing agent pressurized and supplied by the fire-extinguishing agent supplying equipment and spraying the particles, the head being installed in a protection section; and
a voltage application unit for applying an electrification voltage to the electrification spray head,
wherein the electrification spray head is provided with
an injection nozzle for converting the water-based fire-extinguishing agent to particles and spraying the particles by jetting only the water-based fire-extinguishing agent to external space,
an induction electrode unit disposed in a jetting space side of the injection nozzle, and
a water-side electrode unit disposed in the injection nozzle and brought into contact with the water-based fire-extinguishing agent,
and wherein the voltage application unit charges the jetted particles by applying an external electric field generated by applying a voltage between the induction electrode unit and the water-side electrode unit of the electrification spray head to the water-based fire-extinguishing agent in a jetting process from the injection nozzle.
2. The fire prevention equipment according to claim 1 , wherein the water-side electrode unit of the electrification spray head is part of the injection nozzle using an electrically conductive material or a pipe using an electrically conductive material.
3. The fire prevention equipment according to claim 1 , wherein the induction electrode unit of the electrification spray head is any of or a complex of a metal having electric conductivity, a resin having electric conductivity and a rubber having electric conductivity, and has any of a ring shape, a cylindrical shape, a vertical flat-plate shape, a parallel-plate shape, a linear shape and a wire-mesh shape.
4. The fire prevention equipment according to claim 1 , wherein in the electrification spray head in which a voltage of the water-side electrode unit is to be zero volts, the water-side electrode unit is led to earth, and a predetermined electrification voltage is applied from the voltage application unit to the induction electrode unit.
5. The fire prevention equipment according to claim 4 , wherein the voltage application unit applies the predetermined electrification voltage as a DC, AC, or pulsed electrification voltage to the induction electrode unit.
6. The fire prevention equipment according to claim 4 , wherein the voltage application unit applies a voltage of less than ±20 kilovolts as the predetermined electrification voltage to the induction electrode unit.
7. The fire prevention equipment according to claim 1 , wherein part or all of the induction electrode is coated with an insulating material.
8. The fire prevention equipment according to claim 1 , wherein the water-based fire-extinguishing agent is water, seawater, or water containing a fire-extinguishing power enhancing chemical agent.
9. A spraying method of fire prevention equipment, the method comprising:
in case of fire, pressurizing a water-based fire-extinguishing agent and supplying the fire-extinguishing agent to an electrification spray head via a pipe, the electrification spray head being installed in a protection section; and
electrifying and spraying jetted particles of the pressurized and supplied fire-extinguishing agent from the electrification spray head,
wherein the electrification spray head is provided with
an injection nozzle for converting the water-based fire-extinguishing agent to particles and spraying the particles by jetting only the water-based fire-extinguishing agent to external space,
an induction electrode unit disposed in a jetting space side of the injection nozzle, and
a water-side electrode unit disposed in the injection nozzle and brought into contact with the water-based fire-extinguishing agent,
and wherein in said electrifying of the jetted particles, an external electric field generated by applying a voltage between the induction electrode unit and the water-side electrode unit is applied to the water-based fire-extinguishing agent in a jetting process from the injection nozzle so as to electrify the jetted particles.
10. The spraying method of the fire prevention equipment according to claim 9 , wherein the voltage of the water-side electrode unit is caused to be zero volts and lead to earth, and a predetermined electrification voltage is applied to the induction electrode unit.
11. The spraying method of the fire prevention equipment according to claim 10 , wherein a DC, AC, or pulsed electrification voltage is applied as the predetermined electrification voltage to the induction electrode unit.
12. The spraying method of the fire prevention equipment according to claim 10 , wherein a voltage of less than ±20 kilovolts is applied as the predetermined electrification voltage to the induction electrode unit.