Will the distribution room under the high-rise buildings be used as a lightning protection network to attract lightning?

When the lightning rod becomes a lightning arrester, there are many problems in the lightning protection facilities of high-rise buildings.

2011July 5 10:20

When the lightning weather comes, is your neighborhood safe? Can lightning strike be avoided? April to September every year is the lightning-prone period in our province.

It is difficult to block the hidden danger of lightning protection without detecting the lightning rod.

"My community seems to have lightning protection facilities. I haven't asked too much about this. " Ms. Du, who lives in Bianjia Village, told reporters that although she knew that lightning strike was terrible, she always felt very lucky and would not happen to herself.

Near the north gate, the reporter saw that some high-rise buildings in the north gate have installed lightning rods, but is it enough to install only one lightning rod? Zhao Dong, chief engineer of the provincial lightning protection center, said that lightning protection cannot be achieved by a simple lightning rod. There must be a decentralized power grid underground, and there must be conductive wires to connect the lightning rod underground. The whole conductive point can't be shielded, otherwise the lightning protection can't be achieved.

The lightning protection facilities of 200 buildings were destroyed.

"When we conducted lightning protection tests on 200 buildings in 20 communities in Xi 'an in 2009, we found that their lightning protection facilities were destroyed. "Zhao Dong said that it is not difficult to install lightning protection facilities, but it is difficult to ask for annual inspection, because high-rise buildings are required to install lightning protection facilities by administrative regulations from approval to completion.

"When we were testing, once we didn't even enter the door of someone's community, people refused to test directly." Zhao Dong said that the annual inspection fee is about 1 1,000 ~ 2,000 yuan. Because this money needs to be paid by the property, many residential properties refuse to pay the annual inspection fee.

Don't let the lightning rod become a lightning arrester.

Zhao Dong told reporters that the lightning protection zones of high-rise buildings are mostly set on the roofs. Due to years of exposure, natural aging, man-made destruction and other factors, if the annual inspection is not carried out, most of them may have stopped working and become furnishings, which not only completely loses the significance of lightning protection, but also may become a dangerous thing to attract lightning into the room.

During the inspection, they found that some buildings had platforms on the top floor, which were randomly built by citizens and installed with solar energy. Zhao Dong said that citizens simply don't know that there is a lightning protection zone on the top floor, and they often put the solar energy higher than the lightning protection zone, and it is not connected with the surrounding lightning protection zone, which can't conduct lightning, causing hidden dangers.

In addition, there are some hidden dangers of lightning protection, such as the disorderly binding of wires on lightning protection steel bars, the fracture of lightning protection steel bars, and the small lightning protection area. "On one occasion, a corner of the roof was completely knocked out because the lightning protection zone was too small. It will be very dangerous if you hit someone. " Zhao Dong said that in fact, as long as the annual inspection or renovation can be carried out according to regulations, these accidents can be avoided.

In order to prevent direct lightning, lightning protection current induction is also needed.

With the continuous emergence of urban high-rise buildings and the increase of electronic equipment, residential areas, power supply and communication equipment have become the main targets of lightning strikes in summer. Experts from the provincial lightning protection center told reporters that lightning protection is not a simple lightning protection, but a comprehensive lightning protection.

Experts say that due to the increasing number of live equipment, the induction of lightning current will become more and more sensitive. Once, a child went online with headphones and was struck by lightning. Lightning hit the child's tongue through the earphone, causing the tongue to be unconscious for a long time. Therefore, preventing lightning waves from entering is as important as lightning current induction. "According to the regulations, on the top two floors of high-rise buildings, it is best not to install electrical equipment such as computers for safety reasons, so as not to strengthen the sensitivity of lightning current and cause lightning strikes."

News link The high incidence of lightning is coming, and there are "tricks" for lightning protection and disaster avoidance.

Thunderstorm and windy weather, lightning casualties occur from time to time. How to prevent lightning strike? Do you know the correct way to avoid danger? Experts from the lightning protection center will teach you a few tricks.

Indoor lightning protection

If you happen to be at home during strong lightning, you should cut off the power supply of various household appliances indoors; Pay attention to close the doors and windows, and don't go near the doors and windows leading to the outside; Do not get close to metal pipes such as water pipes, heating pipes and gas pipes; Don't take a bath in the bathroom, especially don't use a solar water heater; In thunderstorm weather, try to keep curtains away from air conditioning, or use curtains made of flame retardant fabrics. According to the past lessons, curtains are the main media for the fire spread of window air conditioning. When it thunders and rains, stop using the air conditioner and cut off the power.

Try not to make or answer fixed telephone calls; Do not handle flammable items in open containers; Don't hang or collect clothes on iron pipes or wires on the balcony. Don't venture out; Try not to use radios and televisions with external antennas.

Outdoor lightning protection

If you are outdoors and encounter strong convective weather, you should immediately find shelter. Try to avoid going out. At the same time, don't ride motorcycles, bicycles or run in the wild; When walking in the open field, don't use an umbrella with a metal handle or shoulder metal objects, find a low-lying place and squat down with your feet together to reduce the height as much as possible; Don't touch the rocks on the cave wall when you enter the cave to take shelter from the rain; Don't stay at the top of the building; Don't take shelter from rain beside trees, billboards, chimneys and lamp posts, but take shelter from rain and lightning under trees, at least 5 meters away from trees; Don't use your mobile phone outdoors, and don't swim, row or fish. When a high-voltage line near your body is struck by lightning, jump off the scene with your feet together.

If you can't find a suitable lightning protection place, try to reduce the center of gravity and the contact area between the human body and the ground. You can squat down, put your feet together, put your hands on your knees and bend forward. Never lie on the ground, in a ditch or in a pit. If you wear a raincoat, the lightning protection effect will be better.

If struck by lightning, how to rescue it?

If you feel your hair stand on end, or your skin is obviously shaking, you should know that you may get an electric shock. After the lightning, you should lie on the ground and call for help immediately. When someone is struck by lightning, artificial respiration and external heart massage should be performed immediately, and they should be sent to the hospital for further rescue as soon as possible.

People who are struck by lightning may pretend to be dead. In this case, emergency measures should be taken to rescue them. One is artificial respiration, and the other is heart massage. , on-site rescue. At the same time, lightning accidents may lead to fires, so fire-fighting measures should be taken as soon as possible to reduce burns to people's skin and body.

After the lightning accident, the nearby people should immediately ask the hospital for help while organizing on-site rescue, so as to win valuable time for the final successful rescue of the injured. (Reporter Guan Ying)