What does a lightning rod do, what is the role of a lightning rod

A lightning rod, also known as a lightning rod, is a device used to protect buildings from lightning strikes, etc. A metal rod is installed on the top of a tall building, connected with a metal wire and a metal plate buried in the ground, and the tip of the metal rod is used to discharge electricity to gradually neutralize the electricity carried by the clouds and the electricity on the ground.

Conventional lightning protection can be divided into direct lightning protection, induction lightning protection and comprehensive lightning protection. The lightning protection device against direct lightning is generally composed of three parts, namely the lightning receiver, the down conductor and the grounding body; The lightning receiver is divided into lightning rod, lightning cable, lightning belt, and lightning net. The lightning protection principle with the lightning rod as the lightning receiver is:

The lightning rod is connected to the ground through the wire, forming an equipotential difference with the ground, and using its own height, the electric field of the lightning cloud that increases the electric field strength to the limit value is distorted, and it begins to ionize and discharges downward pilot; The lightning rod produces a tip discharge under the action of a strong electric field, forming an upward pilot discharge; The two converge to form a lightning pathway, which then pours into the earth to achieve the effect of lightning protection. In fact, the lightning rod is a lightning rod, which can attract the surrounding lightning and discharge it in advance, and transmit the lightning current to the ground through its own grounding conductor, so as to avoid direct lightning strikes on the protected object.

When a charged cloud passes over a lightning rod.

Directs charged particles from clouds into the ground.

Avoid the generation of lightning.

The function of lightning rods is to protect buildings, tall trees, etc. from lightning strikes, and to prevent or reduce physical damage and personal life near lightning strikes. A lightning receiver is installed at the top of the protected object, and a wire that meets the specifications is connected to the underground drainage network to introduce lightning current to the ground.

The lightning rod, also known as the lightning rod and the lightning rod, was inventored by the American scientist Franklin.

The lightning rod protects the building not to avoid lightning strikes on the house, but the Shi Cong is to guide the lightning to the thick cherry tree, and then through its down wire and grounding device, the lightning current bench Zheng is introduced into the ground, so as to protect the building.

The lightning rod was formerly known as the "lightning rod".

1. Generally speaking, lightning does not directly hit the lightning rod, and the lightning rod itself has the danger of melting and ** if it is struck by lightning. The lightning protection friend buried needle has a good cavity of antling protection.

2. Lightning rod, also known as lightning rod and lightning rod, is a device used to protect buildings and tall trees from lightning strikes.

3. The lightning rod is composed of three parts: a lightning receiver, a grounding lead and a grounding body. The flash receiver is usually made of round steel or steel pipe with a diameter of 15 20mm and a length of 1 2m, which is fixed at the upper end of the pillar and connected with the grounding body through the grounding lead.

4. When the thundercloud ground discharge channel develops to the ground, because the tip of the lightning rod protrudes from the ground and has good grounding, the electric field strength near the tip of the needle increases, and the charge of opposite polarity accumulates to guide the discharge. This prevents buildings or instruments from accumulating too much charge and being struck by lightning.

In thunderstorms, when there are charged clouds over high-rise buildings, a large number of charges are induced on the lightning rod and the top of the high-rise building. The lightning rod forms a capacitor with these charged clouds, and because it is sharp, that is, the area of the two poles of the capacitor is very small, and the capacitance is also very small, which means that it can hold very little charge.

And it collects most of the charge, so when there is more charge on the clouds, the air between the lightning rod and the clouds can easily break down and become a conductor. In this way, the charged cloud layer forms a path with the lightning rod, and the lightning rod is grounded, and the lightning rod can channel the charge on the cloud layer into the earth, so that it does not pose a danger to the high-rise building and ensures its safety.

Lightning rods, also known as lightning rods and lightning rods, are used to protect buildings, tall trees, etc. from lightning strikes.