A lightning counterstrike protection device

Abstract

The utility model discloses a lightning counterattack protection device, including suppression mechanism a and suppression mechanism b, the both ends of suppression mechanism a are connected with car body shell and ground terminal a electricity respectively, and the both ends of suppression mechanism b are connected with the protected equipment in car and ground terminal b electricity respectively, and there is gas discharge tube c parallel between suppression mechanism a and suppression mechanism b. The utility model has the beneficial effect that when ground terminal a or ground terminal b makes ground potential rise because of lightning, forms reverse current, inhibits current mutation through suppression mechanism a and suppression mechanism b, makes lightning current in ground terminal a and ground terminal b fully neutralize in ground, and imports ground. When ground terminal a and ground terminal b reach the threshold value of gas discharge tube c because of ground potential difference, gas discharge tube c acts, makes the voltage difference control of car head and car tail in the bearing range, thereby protects the electronic equipment in car.

Description

Technical Field

[0001] This utility model relates to the field of lightning protection technology, and in particular to a lightning backflash protection device. Background Technology

[0002] Currently available products for preventing ground potential backflash mainly use isolation or band-stop filtering technology to suppress ground potential and prevent it from damaging equipment. However, these products can only achieve reverse suppression. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lightning strike protection device.

[0004] The purpose of this utility model is achieved through the following technical solution: a lightning backflash protection device, including a suppression mechanism a and a suppression mechanism b, the two ends of the suppression mechanism a are electrically connected to the vehicle body shell and the grounding terminal a respectively, the two ends of the suppression mechanism b are electrically connected to the protected equipment inside the vehicle and the grounding terminal b respectively, and a gas discharge tube c is connected in parallel between the suppression mechanism a and the suppression mechanism b.

[0005] Preferably, the suppression mechanism a includes an inductor a and a gas discharge tube a. One end of the inductor a is electrically connected to the vehicle body shell, and the other end of the inductor a is electrically connected to the ground terminal a. The gas discharge tube a and the inductor a are connected in parallel.

[0006] Preferably, the suppression mechanism b includes an inductor b and a gas discharge tube b. One end of the inductor b is electrically connected to the protected equipment inside the vehicle, and the other end of the inductor b is electrically connected to the grounding terminal b. The gas discharge tube b and the inductor b are connected in parallel.

[0007] Preferably, grounding terminal a is grounded using a ground pile.

[0008] Preferably, grounding terminal b is grounded using a chain or ground stake.

[0009] This invention has the following advantages: When the ground potential of grounding terminal a or grounding terminal b rises due to lightning strike, forming a reverse current, the invention suppresses the current surge through suppression mechanisms a and b, allowing the lightning current to be fully neutralized with the ground at grounding terminals a and b and conducted into the ground; when the ground potential difference between grounding terminals a and b reaches the threshold of gas discharge tube c, gas discharge tube c activates, keeping the voltage difference between the front and rear of the vehicle within the acceptable range, thereby protecting the electronic equipment inside the vehicle. Attached Figure Description

[0010] Figure 1 A schematic diagram illustrating the circuit principle of a lightning backflash protection device.

[0011] In the diagram, 1-inductor a, 2-gas discharge tube a, 3-gas discharge tube b, 4-inductor b, 5-gas discharge tube c, 6-grounding terminal a, 7-grounding terminal b. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0013] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0015] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] In this embodiment, as Figure 1 As shown, a lightning backflashover protection device includes a suppression mechanism a and a suppression mechanism b. The two ends of suppression mechanism a are electrically connected to the vehicle body shell and grounding terminal a6, respectively. The two ends of suppression mechanism b are electrically connected to the protected equipment inside the vehicle and grounding terminal b7, respectively. A gas discharge tube c5 is connected in parallel between suppression mechanisms a and b. When the grounding terminal a6 or grounding terminal b7 experiences a ground potential increase due to a lightning strike, forming a reverse current, the suppression mechanisms a and b suppress the current surge, ensuring that the lightning current is fully neutralized with the ground at grounding terminals a6 and b7 and conducted into the ground.

[0019] Furthermore, the suppression mechanism a includes an inductor a1 and a gas discharge tube a2. One end of the inductor a1 is electrically connected to the vehicle body shell, and the other end of the inductor a1 is electrically connected to the ground terminal a6. The gas discharge tube a2 is connected in parallel with the inductor a1. Further still, the suppression mechanism b includes an inductor b4 and a gas discharge tube b3. One end of the inductor b4 is electrically connected to the protected equipment inside the vehicle, and the other end of the inductor b4 is electrically connected to the ground terminal b7. The gas discharge tube b3 is connected in parallel with the inductor b4. Specifically, when the ground potential of grounding terminal a6 or grounding terminal b7 rises due to a lightning strike, forming a reverse current, inductors a1 and b4 suppress current surges, ensuring that the lightning current is fully neutralized and conducted into the ground at grounding terminals a6 and b7. When the equipment inside the vehicle is operating normally, inductors a1 and b4 provide normal grounding protection, and gas discharge tubes a2 and b3 are in a high-resistance state. When the surge protector at the equipment end trips to ground, the lightning can be discharged through gas discharge tubes a2 and b3. In this embodiment, gas discharge tubes a2, b3, and c5 are all existing products, and no improvements have been made to them, so they will not be described in detail here.

[0020] In this embodiment, grounding terminal a6 is grounded using a ground stake. Furthermore, grounding terminal b7 is grounded using a chain or ground stake. Specifically, grounding terminal a6 and grounding terminal b7 are connected to the front and rear of the vehicle, respectively. Grounding terminal a6 is located near the external grounding busbar on the vehicle. When the potential difference between grounding terminal a6 and grounding terminal b7 reaches the threshold of gas discharge tube c5, gas discharge tube c5 activates, keeping the voltage difference between the front and rear of the vehicle within acceptable limits, thereby protecting the electronic equipment inside the vehicle.

[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lightning backflashover protection device, characterized in that: It includes a suppression mechanism a and a suppression mechanism b. The two ends of the suppression mechanism a are electrically connected to the vehicle body shell and the grounding terminal a (6) respectively. The two ends of the suppression mechanism b are electrically connected to the protected equipment inside the vehicle and the grounding terminal b (7) respectively. A gas discharge tube c (5) is connected in parallel between the suppression mechanism a and the suppression mechanism b.

2. The lightning backflashover protection device according to claim 1, characterized in that: The suppression mechanism a includes an inductor a (1) and a gas discharge tube a (2). One end of the inductor a (1) is electrically connected to the vehicle body shell, and the other end of the inductor a (1) is electrically connected to the grounding terminal a (6). The gas discharge tube a (2) is connected in parallel with the inductor a (1).

3. The lightning backflashover protection device according to claim 2, characterized in that: The suppression mechanism b includes an inductor b (4) and a gas discharge tube b (3). One end of the inductor b (4) is electrically connected to the protected equipment inside the vehicle, and the other end of the inductor b (4) is electrically connected to the grounding terminal b (7). The gas discharge tube b (3) is connected in parallel with the inductor b (4).

4. The lightning backflashover protection device according to claim 3, characterized in that: The grounding terminal a (6) is grounded by a ground pile.

5. The lightning backflashover protection device according to claim 4, characterized in that: The grounding terminal b (7) is grounded by a chain or ground pile.

Images