How to save the electrical equipment on fire

How to use water to extinguish fire under special conditions or without other fire extinguishing agents? Water can conduct electricity. It is harmful to the fire extinguisher's body to use a water jet's water column to save live electrical equipment. Therefore, in the case of live equipment during firefighting, we usually cut off the power supply first and then save. but. When the power cannot be cut off due to production or other reasons, it is necessary to extinguish the fire.

When the water is used to extinguish the fire, the charged body and the jetted water column, the water gun, the human body and the ground will form a current loop. The magnitude of the current passed in this loop has a direct impact on the safety of the human body. If we directly introduce the current obtained from the water column and the water gun into the earth, and the human body is insulated, then we can guarantee the safety of the rescue personnel. Here are some ways to use water to extinguish fire:

First, wear insulated gloves, insulated boots, wear insulated gloves and insulated boots. When water is used to extinguish fire, choose the most experienced squirt gunner to maximize the distance between the nozzle of the squirt gun and the charged body. Take measures to prevent water droplets from flowing into the glove and The rubber boots, standing on the insulation board, facing the fire source, make the water droplets fall on the fire source by the method of shooting. Under normal circumstances, it is best not to use a full water jet directly to the fire source to prevent danger.

Second, a double-stage centrifugal spray head is installed on the gun mouth of the DC water gun using a spray stream, which becomes a two-stage centrifugal spray gun. The water jet from this water gun has a good degree of atomization and is almost non-conductive. Experiments have shown that when the nozzle of the water gun is 5 meters away from the charged body of 127 kV, and there is no leaking current when the fire extinguishes at a pressure of 7 kg per square centimeter, the range can reach 8-9 meters. When this type of spray gun is used to extinguish the fire, the water gun can be charged directly without the ground wire. However, depending on the size of the voltage, the pressure of the fire pump should be kept at 5-7 kg/cm2. After the water sprayed by the spray gun is normal, it can be fired on the charged body to fight the fire.

Third, install a ground wire on the nozzle of the metal water gun The ground wire can use soft copper wire with cross section of 5-10mm and length of 2-5m. The ground bar can use iron pipes or iron bars of about 1m. The firefighter wears insulating gloves and insulated rubber boots. Before the fire is extinguished, the water gunner shall firmly connect one end of the grounding wire to the nozzle of the metal water gun and connect the other end to the grounding rod and drive the grounding rod into the ground. About 5 meters, if the grounding wire is connected with other grounding devices, it is required to have good contact. When holding the water gun, the position of the hand must be placed behind the grounding wire, select the distance from the charged body, and then shoot the water to save.

There are two types of equalization garments currently used in uniform compression garments: one is a warp and weft intertwined fabric made of cotton or animal fibres and copper wire, and the other is made of a cotton cloth made of electroless copper plating or silver plating. of. Both of these compressions are in cotton or cotton cloth and contain very large metallic conductors. Compression garments made of this material include: clothing, socks, uppers, hats, gloves, etc., while the soles are made of conductive rubber. When wearing uniform compression clothes, be sure to fasten the snap fasteners between clothes, gloves, socks and rubber shoes so that the copper wires between them are screwed together to form a good grounding wire, and then select the voltage according to the voltage. Shooting distance, the use of metal water guns to save water.