CN203839705U - A lightning rod with the function of weakening magnetic field coupling - Google Patents

Abstract

The utility model discloses a lightning rod with a function of weakening magnetic field coupling. The lightning rod comprises an arrester, a through-flow cylinder and a grounding pedestal. The through-flow cylinder is fixedly connected between the arrester and the grounding pedestal. The lightning rod with the function of weakening magnetic field coupling also comprises spiral coil which winds the through-flow cylinder. Taps of the two ends of the spiral coil are in short circuit, and are also in short circuit with the grounding pedestal. When the lightning rod with the function of weakening magnetic field coupling leads thunder, the short-circuit spiral coil is enabled to generate induced electromotive force via a magnetic field generated by the through-flow cylinder. Current formed by the induced electromotive force in the spiral coil is led into the ground via the grounding pedestal so that magnetic field coupling formed by the magnetic field via space is effectively weakened, and thus equipment in a peripheral circuit system is protected.

Description

A lightning rod with the function of weakening magnetic field coupling

technical field

The utility model relates to a lightning rod, in particular to a lightning rod with the coupling function of weakening magnetic field.

Background technique

Lightning rod is a device used to protect buildings from being struck by lightning, and is usually installed on the top of buildings. The lightning rod of the lightning rod receives the lightning charge carried by the cloud layer, and introduces the lightning charge into the earth through the current conductor and the lead wire, so as to prevent the current formed by the lightning charge from passing through the building and causing danger. However, at the same time when the lightning rod leads to lightning, when a large amount of current flows through the conductor of the lightning rod, a strong magnetic field is generated around it. This magnetic field is coupled through space to generate an induced electromotive force to other electric and electronic circuit systems with induction conditions, which affects the system. The normal operation of the equipment may even cause its equipment to be damaged. How to weaken the magnetic field coupling generated when the lightning rod triggers lightning is a problem to be solved by those skilled in the art.

Utility model content

In view of the above-mentioned problems in the prior art, the purpose of this utility model is to provide a lightning rod, which can effectively weaken the magnetic field coupling generated when lightning is induced, and has a simple structure, convenient installation and high safety factor.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: a lightning rod with the function of weakening the magnetic field coupling, including: a lightning receptor, a flow-through column, and a grounding base, wherein the flow-through column is fixed connected between the air receptor and the grounded base,

The lightning rod with the coupling function of weakening magnetic field further includes a helical coil, the helical coil is wound around the flow-through cylinder, and the taps at both ends of the helical coil are short-circuited with the ground base.

Preferably, the helical coil is wound from one end to the other end of the flow-through column and closely abuts against the flow-through column.

Preferably, taps at both ends of the helical coil are respectively connected to a cable through a waterproof terminal, and the cable is short-circuited to the ground base.

Compared with the prior art, the beneficial effect of the lightning rod with weakening magnetic field coupling function of the utility model is that: since the helical coil is wound on the flow-through column, and the two ends of the helical coil are short-circuited and connected to the grounding base .When the lightning rod triggers lightning, the magnetic field generated by the flow-through column causes the short-connected spiral coil to generate an induced electromotive force, and the current formed by the induced electromotive force in the spiral coil is introduced into the earth through the grounding base, effectively weakening the magnetic field formed through the space The magnetic field coupling protects the equipment in the surrounding circuit system; in addition, this helical coil has a simple structure, and only needs to be wound around the current column and shorted.

Description of drawings

Fig. 1 is the exploded structure schematic diagram of the lightning rod with weakening magnetic field coupling function of the embodiment of the present utility model;

Fig. 2 is a schematic diagram of the overall structure of the lightning rod with the coupling function of weakening magnetic field according to the embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1 and Fig. 2, a lightning rod with weakening magnetic field coupling function provided by the specific embodiment of the utility model includes: lightning receptor 1, flow-through column body 2, grounding base 3, flow-through column The body 2 is fixedly connected between the lightning receptor 1 and the grounding base 3; the lightning rod with weakening magnetic field coupling function of the embodiment of the utility model also includes a helical coil 4, the helical coil 4 is wound around the flow-through column 2, and the helical coil The taps at both ends of 4 are short-circuited and connected to the ground base 3. Referring to Fig. 1 , the flow column 2 is fixedly connected to the lightning receptor 1 and the grounding base 3 through external threads at both ends. The advantage of this connection method is that it is easy to install and disassemble. Figures 1 and 2 of this embodiment show that the flow cylinder is rod-shaped, and it is conceivable that the flow cylinder can also be a U-shaped cylinder, a curved cylinder, etc., all of which belong to the utility model within the range of optional embodiments.

Since the helical coil 4 is wound on the flow-through cylinder 2, and the two ends of the helical coil 4 are short-circuited and connected to the ground base 3, the flow-through cylinder 2 of the lightning rod is equivalent to the primary stage of the high-frequency switching power supply. The coil 4 is equivalent to the secondary of the high-frequency switching power supply. The magnetic field generated by the flow-through column 2 causes the short-circuited helical coil 4 to generate an induced electromotive force, and the current formed by the induced electromotive force in the helical coil 4 is introduced into the earth through the grounding base 3, Effectively weaken the magnetic field coupling formed by the magnetic field through the space, thereby protecting the equipment in the surrounding circuit system.

As an improvement, the lightning rod is installed on the top of a tall building, which is often affected by a large wind speed. In order to make the connection between the helical coil 4 and the flow column 2 stable, and to weaken the magnetic field to a greater extent through the magnetic field coupling formed in the space , the helical coil 4 of this embodiment is wound from one end to the other end of the flow-through cylinder 2, and the helical coil 4 is closely attached to the flow-through cylinder 2, that is, as shown in FIGS. 1 and 2 , the helical coil The inner diameter surrounded by 4 is not greater than the outer diameter of the through-flow cylinder 2.

As a further improvement, the taps at both ends of the helical coil of the lightning rod with the function of weakening magnetic field coupling in this embodiment are respectively connected to a cable through a waterproof terminal, and the cable is shorted to the ground base. Referring to Fig. 2, there are many ways to short-circuit the two ends of the helical coil 4 and the grounding base 3. For example, the metal wire cores at both ends of the helical coil 4 can be wound and tightened, and the metal screws can be fastened to the grounding base 3. Seat 3 on. Although this short-circuit method is feasible, it is easy to cause leakage during the lightning process because the metal core wire is exposed. A preferred embodiment of the present utility model provides a cable 5 with a waterproof terminal 51 as shown in FIG. .

Claims (3)

1. A lightning rod with a magnetic field weakening coupling function, comprising: a lightning receptor, a flow-through cylinder, and a grounding base, wherein the current-through cylinder is fixedly connected between the lightning receptor and the grounding base Among them, it is characterized in that the lightning rod with weakening magnetic field coupling function also includes a helical coil, the helical coil is wound around the flow-through column, and the taps at both ends of the helical coil are short-circuited and connected to the ground base seat shorted. 2. The lightning rod with weakening magnetic field coupling function according to claim 1, characterized in that, the helical coil is wound from one end to the other end of the flow-through cylinder and closely abuts against the flow-through cylinder . 3. The lightning rod with weakening magnetic field coupling function according to claim 1, wherein the taps at both ends of the helical coil are respectively connected to a cable through a waterproof terminal, and the cable is connected to the ground base seat shorted.