CN107069687B

CN107069687B - Lightning protection device

Info

Publication number: CN107069687B
Application number: CN201710227007.0A
Authority: CN
Inventors: 郭尔峰; 蔡维聪
Original assignee: Guangzhou Jingzhuo Lighting Technology Co ltd
Current assignee: Guangzhou Jingzhuo Lighting Technology Co ltd
Priority date: 2017-04-07
Filing date: 2017-04-07
Publication date: 2020-06-09
Anticipated expiration: 2037-04-07
Also published as: CN107069687A

Abstract

The invention provides a lightning protection device. The lightning protection device comprises a spacer and an internal circuit arranged in the spacer, the internal circuit comprises a lightning protection circuit and a frequency modulation device which are connected with each other, the lightning protection circuit is connected with an external power supply, the frequency modulation device is connected with a protected device, and the lightning protection circuit comprises a piezoresistor RV, a first inductor L1, a second inductor L2, a first high withstand voltage capacitor CX1, a second high withstand voltage capacitor CX2 and a resistor R1; the external power supply, the first inductor L1, the first high withstand voltage capacitor CX1, the second high withstand voltage capacitor CX2, the second inductor L2 and the varistor RV are sequentially connected in series, one end of the resistor R1 is connected between the second high withstand voltage capacitor CX2 and the first high withstand voltage capacitor CX2, and the other end of the resistor R1 is grounded. The lightning protection device provided by the invention solves the technical problems of large volume and poor applicability of the lightning protection device in the related technology.

Description

Lightning protection device

Technical Field

The invention relates to the technical field of lightning protection, in particular to a lightning protection device.

Background

Lightning disasters are one of the ten most serious natural disasters published internationally. The lightning disaster accidents are frequent every year, the related range is wide, and the life and property safety of the masses is seriously threatened. Especially in the present day of rapid development of microelectronic technology, lightning strike discharge is not only the damage to buildings and equipment at the lightning strike point, but also the damage to many adjacent electronic equipment or power transmission lines can be simultaneously caused because the lightning strike energy is rapidly diffused in all directions by electromagnetic wave radiation and line propagation, and therefore, the reduction of lightning disasters is the primary objective to be realized by modern lightning protection technology.

In the related art, an isolation method is often adopted to prevent lightning, so that the lightning protection device has large volume and high manufacturing cost, cannot be installed in small electrical appliances such as lamps and small bulbs, and cannot meet the use conditions of high voltage or high-low mixed voltage.

Therefore, there is a need to provide a new lightning protection device to solve the above problems.

Disclosure of Invention

The invention aims to provide a lightning protection device which is simple in structure, small in size and suitable for high-low mixed pressure.

In order to solve the technical problem, the invention provides a lightning protection device, which comprises a separator and an internal circuit arranged in the separator, wherein the internal circuit comprises a lightning protection circuit and a frequency modulation device which are connected with each other, the lightning protection circuit is connected with an external power supply, the frequency modulation device is connected with a protected device, and the lightning protection circuit comprises a piezoresistor RV, a first inductor L1, a second inductor L2, a first high withstand voltage capacitor CX1, a second high withstand voltage capacitor CX2 and a resistor R1; the external power supply, the first inductor L1, the first high withstand voltage capacitor CX1, the second high withstand voltage capacitor CX2, the second inductor L2 and the varistor RV are sequentially connected in series, one end of the resistor R1 is connected between the second high withstand voltage capacitor CX2 and the first high withstand voltage capacitor CX2, and the other end of the resistor R1 is grounded.

Preferably, the lightning protection circuit also includes fuse FU, first high withstand voltage electric capacity CX1 with second high withstand voltage electric capacity CX2 constitutes the electric capacity group jointly, fuse FU with electric capacity group parallel arrangement.

Preferably, the fuse FU is a copper sheet.

Preferably, the number of the fuses FU is three.

Preferably, the external power supply is a three-phase ac power supply.

Preferably, the spacer is a glass fiber plate or a ceramic plate.

Preferably, the withstand voltage value of the separator is 12 KV.

Preferably, the inductance ranges of the first inductor L1 and the second inductor L2 are both 0.1-330 μ H.

Compared with the related art, the lightning protection device provided by the invention has the following beneficial effects:

the lightning protection device comprises an isolator and an internal circuit, wherein the internal circuit comprises a lightning protection circuit and a frequency modulation device which are connected with each other, and the lightning protection circuit comprises a piezoresistor RV, a first inductor L1, a second inductor L2, a first high withstand voltage capacitor CX1, a second high withstand voltage capacitor CX2 and a resistor R1; the external power supply, first inductance L1, first high withstand voltage electric capacity CX1, second high withstand voltage electric capacity CX2, second inductance L2 and piezo-resistor RV establish ties in proper order, resistance R1 one end inserts second high withstand voltage electric capacity CX2 with between the first high withstand voltage electric capacity CX2, other end ground. Thereby realize the secondary reposition of redundant personnel of lightning protection device to the lightning surge, the lightning surge gets into the lightning protection circuit and steps down to several hundreds of magnitude of volts through piezo-resistor RV, and the electric current reduces this moment, and one end is passed through first inductance L1 releases, and the other end passes through the release of second inductance L2, still can not get the reposition of redundant personnel at the same time and can also release to the ground wire through first high withstand voltage electric capacity CX1 and second high withstand voltage electric capacity CX 2. The lightning protection device is simple and small in structure, is separated from protected equipment, saves cost, is convenient to install inside a small electric appliance, adopts a dredging and shunting method to gradually reduce lightning surge, achieves the effect of pressure reduction without damaging the conductivity of a circuit, ensures the safety of the protected equipment and can be used under the conditions of high pressure or high-low mixed pressure.

Two the circuit is still including fuse FU to the lightning protection, first high withstand voltage electric capacity CX1 with second high withstand voltage electric capacity CX2 constitutes electric capacity group jointly, fuse FU with electric capacity group sets up in parallel. When lightning surge cannot be completely released after being shunted twice, the fuse FU can be instantly fused to exhaust the energy of the lightning surge, so that the safety of protected equipment is further ensured.

Drawings

FIG. 1 is a schematic diagram of the connection of the lightning protection device of the present invention with an external power source and protected equipment;

FIG. 2 is a schematic diagram of the connection between the lightning protection circuit and the frequency modulation device of the lightning protection device shown in FIG. 1;

fig. 3 is a circuit diagram of the lightning protection circuit shown in fig. 2.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1, fig. 2 and fig. 3, in which fig. 1 is a schematic diagram of a connection between a lightning protection device and an external power source and a protected device according to the present invention, fig. 2 is a schematic diagram of a connection between a lightning protection circuit of the lightning protection device shown in fig. 1 and a frequency modulation device, and fig. 3 is a circuit diagram of the lightning protection circuit shown in fig. 2. The lightning protection device 100 is used for connecting an external power supply and protected equipment, and the lightning protection device 100 comprises a separator and an internal circuit 3 arranged in the separator.

In this embodiment, the withstand voltage value of the separator is 12KV, and the separator is a glass fiber plate or a ceramic plate.

The interior circuit 3 comprises a lightning protection circuit 31 and a frequency modulation device 33 which are connected with each other, the lightning protection circuit 31 is connected with an external power supply, the frequency modulation device 33 is connected with a protected device, and the frequency modulation device 33 is used for meeting the power supply requirement and smoothly transmitting the power supply to the protected device.

The lightning protection circuit 31 comprises a piezoresistor RV, a first inductor L1, a second inductor L2, a first high voltage-resistant capacitor CX1, a second high voltage-resistant capacitor CX2, a resistor R1 and a fuse FU.

The external power supply, first inductance L1, first high withstand voltage electric capacity CX1, second high withstand voltage electric capacity CX2, second inductance L2 and piezo-resistor RV establish ties in proper order, resistance R1 one end inserts second high withstand voltage electric capacity CX2 with between the first high withstand voltage electric capacity CX2, other end ground.

First high withstand voltage electric capacity CX1 with second high withstand voltage electric capacity CX2 constitutes the electric capacity group jointly, fuse FU with electric capacity group parallel arrangement.

In this embodiment, fuse FU is the copper sheet, fuse FU's quantity is 3.

One of the first inductor L1 and the varistor RV is connected to the live line of the external power supply, and the other is connected to the neutral line of the external power supply.

The inductance ranges of the first inductor L1 and the second inductor L2 are both 0.1-330 muH.

Compared with the related art, the lightning protection device 100 provided by the invention has the following beneficial effects:

the lightning protection device 100 comprises a separator and an internal circuit 3, the internal circuit 3 comprises a lightning protection circuit 31 and a frequency modulation device 33 which are connected with each other, and the lightning protection circuit 31 comprises a piezoresistor RV, a first inductor L1, a second inductor L2, a first high withstand voltage capacitor CX1, a second high withstand voltage capacitor CX2 and a resistor R1; the external power supply, first inductance L1, first high withstand voltage electric capacity CX1, second high withstand voltage electric capacity CX2, second inductance L2 and piezo-resistor RV establish ties in proper order, resistance R1 one end inserts second high withstand voltage electric capacity CX2 with between the first high withstand voltage electric capacity CX2, other end ground. Thereby realize the secondary reposition of redundant personnel of lightning protection device to the lightning surge, the lightning surge gets into lightning protection circuit 31 and steps down the magnitude of several hundred volts through piezo-resistor RV, and the electric current reduces this moment, and one end is passed through first inductance L1 releases, and the other end passes through the release of second inductance L2, still can not get the reposition of redundant personnel at the same time and can also release to the ground wire through first high withstand voltage electric capacity CX1 and second high withstand voltage electric capacity CX 2. The lightning protection device is simple and small in structure, is separated from protected equipment, saves cost, is convenient to install inside a small electric appliance, adopts a dredging and shunting method to gradually reduce lightning surge, achieves the effect of pressure reduction without damaging the conductivity of a circuit, ensures the safety of the protected equipment and can be used under the conditions of high pressure or high-low mixed pressure.

Two, lightning protection circuit 31 still includes fuse FU, first high withstand voltage electric capacity CX1 with second high withstand voltage electric capacity CX2 constitutes the electric capacity group jointly, fuse FU with electric capacity group parallel arrangement. When lightning surge cannot be completely released after being shunted twice, the fuse FU can be instantly fused to exhaust the energy of the lightning surge, so that the safety of protected equipment is further ensured.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A lightning protection device is characterized by comprising a separator and an internal circuit arranged in the separator, wherein the internal circuit comprises a lightning protection circuit and a frequency modulation device which are connected with each other; the lightning protection circuit comprises a piezoresistor RV, a first inductor L1, a second inductor L2, a first high voltage-resistant capacitor CX1, a second high voltage-resistant capacitor CX2 and a resistor R1; the external power supply, the first inductor L1, the first high withstand voltage capacitor CX1, the second high withstand voltage capacitor CX2, the second inductor L2 and the varistor RV are sequentially connected in series, one end of the resistor R1 is connected between the second high withstand voltage capacitor CX2 and the first high withstand voltage capacitor CX2, and the other end of the resistor R1 is grounded; therefore, secondary shunting of the lightning surge is realized by the lightning protection device, the lightning surge enters the lightning protection circuit and is reduced to several hundred volts by the voltage dependent resistor RV, at the moment, the current is reduced, one end of the lightning surge is released by the first inductor L1, the other end of the lightning surge is released by the second inductor L2, shunting cannot be achieved at the same time, and the lightning surge can be released to the ground wire by the first high-voltage-resistant capacitor CX1 and the second high-voltage-resistant capacitor CX 2;

the lightning protection circuit further comprises a fuse FU, the first high withstand voltage capacitor CX1 and the second high withstand voltage capacitor CX2 jointly form a capacitor bank, and the fuse FU is connected with the capacitor bank in parallel; the number of the fuses FU is three; when lightning surge cannot be completely released after being shunted, the fuse FU is instantly fused to exhaust the energy of the lightning surge, so that the safety of protected equipment is further ensured;

the method of leading and shunting is adopted to gradually reduce the lightning surge, achieve the effect of pressure reduction without damaging the conductivity of the circuit, ensure the safety of the protected equipment and use under the conditions of high pressure or high-low mixed pressure.

2. The lightning protection device of claim 1, wherein the fuse FU is a copper sheet.

3. The lightning protection device of claim 1, wherein the external power source is a three-phase alternating current power source.

4. The lightning protection device of claim 1, wherein the barrier is a fiberglass or ceramic sheet.

5. The lightning protection device according to any one of claims 1 and 4, wherein the barrier has a withstand voltage of 12 KV.

6. The lightning protection device of claim 1, wherein the inductance of the first inductor L1 and the inductance of the second inductor L2 are both in the range of 0.1-330 μ H.