Experts advise: Do not ignore indoor lightning protection and lightning protection

Right now, the climate is gradually entering a thunderstorm season. The knowledge of outdoor lightning protection and lightning protection is relatively clear to students, but many people know little about indoor lightning protection knowledge. Therefore, experts advise that do not ignore indoor lightning protection and lightning protection.

First of all, pay attention to home appliances lightning protection. Do not use electrical equipment and equipment without lightning protection. Usually use low-voltage line insulators to ground or install a low-voltage arrester or fault protection device on the first support of the low-voltage line. Indoor appliances should be turned off and unplugged after each use. When lightning is turned on, it is best to turn off the indoor main power switch and unplug the network cable to prevent lightning induced lightning and lightning surges from entering the indoor electrical equipment.

Followed by personal lightning protection. Keep away from the basic principles of possible lightning strikes on objects. When thundering, as far as possible from the windows, sitting in the middle of the room is the safest, should avoid the permanent light, thunderstorms prevent lightning waves along the line after entering the building and causing personal injury, people and lights, switches, sockets and electrical equipment The distance should be maintained at more than 2 meters. According to statistics, the distance between human and casualties caused by lightning discharge is 1.5 meters, which accounts for more than 90% of indoor lightning strikes, discharge distance of more than 2 meters or more, and lightning strike accidents are almost zero.

In addition, if conditions permit, doors and windows can use metal mesh cover to prevent the ball from lightning strike to the room. For reinforced concrete frame structures, closing doors and windows can effectively prevent lateral strikes and spherical lightning intrusion. Therefore, thunderstorm days cannot stay at the top of buildings (houses). Wet clothing and footwear should not be used indoors. We must not use electrical appliances and communication tools. Do not approach naked metal objects such as water pipes, heating pipes, and gas pipes. Water pipes, etc., do not use solar energy, natural gas or electric showers, and lightning currents can cause death through the conduction of water currents.

T&Square Bolt

The national standards for T-bolts are as follows:

GB / T 2165-1991 machine tool fixture parts and components T-groove quick release Bolt (obsolete) was adjusted to JB / T 8007.2-1995, and then replaced by JB / T 8007.2-1999 | machine tool fixture parts and components T-groove quick release bolt

Bolts for T-groove (GB / T 37-1988)

There is also mechanical standard: JB / T 1709-1991 T-bolt (obsolete), replaced by JB / T 1700-2008 valve parts nut, bolt and plug

At present, din186 T-type square neck bolts, GB 37, din188t type double neck bolts are commonly used. The materials are carbon steel, stainless steel, alloy steel, etc. the specifications range from m8-m64. Musheng, a domestic high-quality hardware manufacturer with good quality control, has formed a mature process.

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