Lightning protection grounding equipment capable of meeting requirements of insulation and voltage resistance test and electromagnetic shielding

Abstract

The invention relates to the technical field of thunder and lightning protection, and discloses thunder and lightning protection grounding equipment meeting insulation and voltage resistance test and electromagnetic shielding requirements. A lightning protection grounding pole is installed on one side of the equipment case, a metal soldering lug is installed on the outer side of the end, close to the equipment case, of the lightning protection grounding pole, a lightning protection grounding wire is installed between the metal soldering lug and the lightning protection circuit, and a metal shielding cap is installed on the outer side of the end, away from the lightning protection grounding wire, of the lightning protection grounding pole. The lightning protection grounding pole is connected with equipment through the metal shielding cap, lightning current protected by the lightning protection circuit can be discharged to the lightning protection grounding pole along the lightning protection grounding wire and the metal soldering lug and is discharged to the ground through the equipment case shell, and when the metal shielding cap enables the lightning protection grounding pole not to be in lap joint with the equipment case, the lightning protection grounding pole is not in lap joint with the equipment case. The lightning protection circuit does not generate a discharge path to an equipment cabinet, and can carry out insulation and voltage resistance test of a power line.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning protection, and particularly to a lightning protection grounding device that meets the requirements of insulation withstand voltage testing and electromagnetic shielding. Background Art

[0002] Lightning, as a natural phenomenon, the powerful electromagnetic field and transient high-voltage spike pulses it generates pose a serious threat to electronic devices. For airborne devices, since they are installed on an aircraft and fly at high altitudes with the aircraft, they are more vulnerable to lightning. When lightning strikes the aircraft or the clouds near the aircraft, a transient lightning effect environment will be formed inside the aircraft, and voltages and currents will be induced inside the airborne devices through electromagnetic coupling or structural voltages, etc., thus causing interference or damage to the devices. In order to ensure the normal operation of airborne devices in a lightning environment and prevent the devices from being damaged or affecting their performance due to lightning strikes, lightning protection design is required.

[0003] For the lightning protection of the existing device power supply ports, surge protectors are often installed, which can effectively prevent damage to the device caused by lightning strikes. When the test voltage of the device exceeds the trigger threshold of the surge protection circuit, the current will be quickly directed to the ground wire to protect the backend circuit, resulting in the surge protection circuit triggering its protection mechanism such as overcurrent protection or short-circuit protection during the insulation withstand voltage test. The triggering of this protection mechanism will cause the test to be interrupted or the test results to be abnormal.

[0004] Therefore, the present invention provides a lightning protection grounding device that meets the requirements of insulation withstand voltage testing and electromagnetic shielding. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0006] The present invention provides a lightning protection grounding device that meets the requirements of insulation withstand voltage testing and electromagnetic shielding, including a device chassis; on one side inside the device chassis, a filter protection circuit board is installed, on the surface of the filter protection circuit board, a lightning protection circuit is installed, on one side of the device chassis, a lightning protection grounding post is installed, on the outer side of the end of the lightning protection grounding post close to the device chassis, a metal solder tab is installed, between the metal solder tab and the lightning protection circuit, a lightning protection grounding wire is installed, on the outer side of the end of the lightning protection grounding post far from the lightning protection grounding wire, a metal shielding cap is installed, and at one end of the outer wall of the device chassis close to the metal shielding cap, a power port connector is installed.

[0007] Preferably, in order to achieve an insulating connection between the lightning protection grounding post and the device chassis, an insulating device is installed inside the device chassis, and the lightning protection grounding post penetrates through the inside of the insulating device.

[0008] Preferably, in order to fix the lightning protection grounding column, locking nuts are installed on the outer sides of the lightning protection grounding column near both ends of the insulating device.

[0009] Preferably, in order to fix the metal shielding cap, a metal clip is installed on the outer wall of the equipment chassis near the metal shielding cap.

[0010] Preferably, in order to prevent the metal shielding cap from falling off when it is separated from the lightning protection grounding column, a connecting ring is rotatably installed on the outer wall of the metal shielding cap, a limiting block is installed on the outer surface of the connecting ring, an anti-detachment block is installed at one end of the limiting block away from the connecting ring, and a guiding groove is provided inside the metal clip, and the limiting block and the anti-detachment block pass through the inside of the guiding groove.

[0011] Preferably, a connecting spring is installed inside the connecting ring, and the other end of the connecting spring is connected to the limiting block.

[0012] Preferably, a groove is provided on the outer wall of the metal shielding cap, and a convex ring is provided on the inner wall of the connecting ring, and the convex ring is located inside the groove.

[0013] Preferably, in order to improve the anti-detachment effect of the metal shielding cap, an insertion block is installed on the side of the anti-detachment block close to the equipment chassis, a positioning block is installed on the surface of the metal clip close to the insertion block, the insertion block is located inside the positioning block, and a positioning pin is installed on the top of the positioning block, and the bottom of the positioning pin is located inside the insertion block.

[0014] Preferably, one side of the bottom of the positioning pin is a bevel surface.

[0015] 1. The beneficial effects of the present invention are as follows: For the lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding, through the combined use of metal solder joints, lightning protection grounding wires, metal shielding caps and lightning protection grounding columns, the lightning protection grounding column is connected to the equipment through the metal shielding cap. The lightning current protected by the lightning protection circuit can be discharged to the lightning protection grounding column along the lightning protection grounding wire and the metal solder joint, and discharged to the ground through the housing of the equipment chassis. When the metal shielding cap does not lap the lightning protection grounding column with the equipment chassis and the lightning protection circuit does not generate a discharge path for the equipment chassis, the insulation withstand voltage test of the power supply line can be carried out. In this way, the test voltage can be not reduced, and the insulation withstand voltage test of the equipment can be carried out according to the standard insulation withstand voltage test voltage, and the insulation withstand voltage test method is relatively convenient. Without destroying the original structural shielding efficiency design of the equipment, the equipment can meet the shielding efficiency requirements of the military standard.

[0016] 2. For the lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding of the present invention, through the combined use of the limiting block, the anti-detachment block and the guiding groove, by moving the limiting block and the anti-detachment block along the inside of the guiding groove, it can be avoided that the metal shielding cap falls off when it is separated from the lightning protection grounding column, thereby avoiding the loss of parts.

[0017] 3. The lightning protection grounding device that meets the requirements of insulation withstand voltage testing and electromagnetic shielding according to the present invention uses an insertion block, a positioning block, and a positioning pin in cooperation. When the metal shielding cap drives the insertion block to be located inside the positioning block through the anti-detachment block, the insertion block can be fixed inside the positioning block through the positioning pin. At this time, the metal shielding cap can be further fixedly connected to the metal fitting, thereby improving the anti-detachment effect of the metal shielding cap. Description of the Drawings

[0018] Figure 1 is the top internal perspective view of the embodiment of the present invention; Figure 2 is the schematic diagram of the internal structure of the metal shielding cap part in the present invention; Figure 3 is the schematic diagram of the separated state of the metal shielding cap and the equipment chassis in the present invention; Figure 4 is Figure 3 the partial enlarged view at A in Figure 5 is the schematic diagram of the unfolded structure of the metal shielding cap part in the present invention; Figure 6 is the schematic diagram of the internal structure of the connecting ring part in the present invention; Figure 7 is the schematic diagram of the internal structure of the positioning pin part in the present invention.

[0019] Description of the Reference Numerals: 1. Equipment chassis; 101. Filter protection circuit board; 102. Lightning protection circuit; 103. Power port connector; 2. Lightning protection grounding wire; 3. Metal solder tab; 4. Metal shielding cap; 401. Connecting ring; 402. Connecting spring; 403. Limiting block; 404. Anti-detachment block; 405. Groove; 406. Convex ring; 5. Insulating device; 6. Lightning protection grounding column; 601. Locking nut; 7. Metal fitting; 701. Positioning block; 702. Positioning pin; 703. Guide groove; 8. Insertion block. Detailed Embodiments

[0020] Now, the subject matter described herein will be discussed with reference to example embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0021] Embodiment 1 The technical solution of the present invention will be further elaborated in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. Please refer to Figures 1 to 7 , the lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding provided by the present application. Please pay special attention to Figure 1 and Figure 2 , including an equipment chassis 1; a filtering and protection circuit board 101 is installed on one side inside the equipment chassis 1, a lightning protection circuit 102 is installed on the surface of the filtering and protection circuit board 101, a lightning protection grounding post 6 is installed on one side of the equipment chassis 1, a metal solder tab 3 is installed on the outer side of the end of the lightning protection grounding post 6 close to the equipment chassis 1, a lightning protection grounding wire 2 is installed between the metal solder tab 3 and the lightning protection circuit 102, a metal shielding cap 4 is installed on the outer side of the end of the lightning protection grounding post 6 away from the lightning protection grounding wire 2, and a power port connector 103 is installed at one end of the outer wall of the equipment chassis 1 close to the metal shielding cap 4. Through the power port connector 103, the equipment chassis 1 can be electrically connected to the outside through a connecting wire.

[0022] Specifically, the equipment chassis 1 is composed of an equipment circuit, a filtering and protection circuit board 101, a lightning protection circuit 102 and a power port connector 103. The lightning protection circuit 102 is connected to the lightning protection grounding post 6 through the lightning protection grounding wire 2 and the metal solder tab 3. The lightning protection grounding post 6 is reliably connected to the equipment through the metal shielding cap 4. When the lightning protection circuit 102 conducts protection, the lightning current can be discharged to the lightning protection grounding post 6 along the lightning protection grounding wire 2 and the metal solder tab 3 in time, and is discharged to the ground through the shell of the equipment chassis 1. When the metal shielding cap 4 is removed, the lightning protection grounding post 6 is not overlapped with the equipment chassis 1, and the lightning protection circuit 102 does not generate a discharge path for the equipment chassis 1, and the insulation withstand voltage test of the power supply line can be carried out.

[0023] Please pay special attention to Figure 2 , an insulating device 5 is installed inside the equipment chassis 1, and the lightning protection grounding post 6 penetrates through the inside of the insulating device 5.

[0024] Specifically, in order to achieve the insulating connection between the lightning protection grounding post 6 and the equipment chassis 1, the insulating device 5 is arranged inside the equipment chassis 1. The insulating device 5 is composed of insulating materials. When the lightning protection grounding post 6 is installed inside the equipment chassis 1 through the insulating device 5, it can be avoided that the outer side of the lightning protection grounding post 6 directly contacts the equipment chassis 1, so as to achieve the insulating connection between the lightning protection grounding post 6 and the equipment chassis 1.

[0025] Please pay special attention to Figure 3 , threads are provided on the outer side of the lightning protection grounding post 6, and locking nuts 601 are installed on the outer side of the two ends of the lightning protection grounding post 6 close to the insulating device 5.

[0026] Specifically, in order to fix the lightning protection grounding column 6 and prevent it from falling off from the inside of the insulating device 5 during use, the lightning protection grounding column 6 is passed through the inside of the insulating device 5, and the locking nut 601 is threadedly fixed on the outer sides of both ends of the lightning protection grounding column 6. The extrusion force formed between the lightning protection grounding column 6 and the equipment chassis 1 by the locking nut 601 can fix the lightning protection grounding column 6, thereby preventing the lightning protection grounding column 6 from falling off from the inside of the insulating device 5.

[0027] Please refer specifically to Figure 3 , a metal clip 7 is installed on one side of the outer wall of the equipment chassis 1 close to the metal shielding cap 4, and the metal clip 7 is C-shaped.

[0028] Specifically, in order to fix the metal shielding cap 4, when the metal shielding cap 4 is fixedly connected to the lightning protection grounding column 6, one side of the metal shielding cap 4 will be stuck inside the metal clip 7, and the metal shielding cap 4 can be fixed by the elasticity of the metal clip 7 itself.

[0029] Please refer specifically to Figure 3 , Figure 4 , Figure 5 and Figure 6 , a connecting ring 401 is rotatably installed on the outer wall of the metal shielding cap 4, a limiting block 403 is installed on the outer surface of the connecting ring 401, an anti-detachment block 404 is installed at one end of the limiting block 403 away from the connecting ring 401, and the limiting block 403 and the anti-detachment block 404 are fixedly connected by bolts. A guiding groove 703 is provided inside the metal clip 7, and the limiting block 403 and the anti-detachment block 404 pass through the inside of the guiding groove 703. The guiding groove 703 can provide a guiding function for the movement of the limiting block 403. A connecting spring 402 is installed inside the connecting ring 401, and the other end of the connecting spring 402 is connected to the limiting block 403. A groove 405 is provided on the outer wall of the metal shielding cap 4. By the compression deformation of the connecting spring 402, the limiting block 403 after removing the anti-detachment block 404 can be moved inside the connecting ring 401, and then the connecting ring 401 can be disassembled from the outside of the lightning protection grounding column 6. A convex ring 406 is provided on the inner wall of the connecting ring 401, and the convex ring 406 is located inside the groove 405.

[0030] Specifically, to prevent the metal shielding cap 4 from falling off when it is separated from the lightning protection grounding post 6, the worker rotates the metal shielding cap 4, and the metal shielding cap 4 is rotationally connected outside the lightning protection grounding post 6. As the metal shielding cap 4 moves to a certain position, by squeezing the limiting block 403, the connecting spring 402 is compressed. When the limiting block 403 is located at the bottom of the guiding groove 703, the connecting spring 402 is not squeezed, and it will drive the limiting block 403 to be located inside the guiding groove 703. Then, a bolt is used to fixedly install the anti-detachment block 404 at the top of the limiting block 403, and the anti-detachment block 404 can be slidably connected to the limiting block 403. When the worker rotates the metal shielding cap 4 in the reverse direction and separates the metal shielding cap 4 from the lightning protection grounding post 6, due to the limiting effect of the guiding groove 703 on the limiting block 403, the groove 405 on the outer wall of the metal shielding cap 4 will rotate along the convex ring 406 on the inner wall of the connecting ring 401. By moving the limiting block 403 and the anti-detachment block 404 along the inside of the guiding groove 703, it can be avoided that the metal shielding cap 4 falls off when it is separated from the lightning protection grounding post 6.

[0031] Please refer particularly to Figure 4 and Figure 7 On the side of the anti-detachment block 404 close to the equipment chassis 1, an insertion block 8 is installed. On the surface of the metal fastener 7 close to the insertion block 8, a positioning block 701 is installed. One side of the insertion block 8 close to the positioning block 701 is an inclined surface. Inside the positioning block 701, there is a slot corresponding to the insertion block 8. The insertion block 8 is located inside the positioning block 701. At the top of the positioning block 701, a positioning pin 702 is installed. The positioning pin 702 is composed of a rod body and a spring. A spring is wound around the outside of the rod body. One end of the spring is connected to the rod body, and the other end is connected to the positioning block 701. The bottom of the positioning pin 702 is located inside the insertion block 8. Inside the insertion block 8, there is a slot corresponding to the bottom end of the positioning pin 702. One side of the bottom of the positioning pin 702 is an inclined surface.

[0032] Specifically, to improve the anti-detachment effect of the metal shielding cap 4, when one side of the metal shielding cap 4 is stuck inside the metal fastener 7, the insertion block 8 will be located inside the positioning block 701. At the same time, the insertion block 8 will squeeze the inclined surface at the bottom of the positioning pin 702, and the positioning pin 702 will move upward under the action of its own spring. When the insertion block 8 is located inside the positioning block 701, the slot inside the insertion block 8 will be located at the bottom end of the positioning pin 702. At this time, the positioning pin 702 will, under the action of its own spring, insert its bottom end into the slot inside the insertion block 8. At this time, the metal shielding cap 4 can be further fixedly connected to the metal fastener 7, thereby improving the anti-detachment effect of the metal shielding cap 4.

[0033] Working principle: In the lightning protection state: By locking the metal shielding cap 4 onto the lightning protection grounding post 6, it is ensured that the lightning protection grounding post 6 is reliably connected to the equipment chassis 1. When the lightning protection circuit 102 conducts protection, the lightning current can be promptly discharged along the lightning protection grounding wire 2 and the metal solder tab 3 to the lightning protection grounding post 6, and then discharged to the ground through the outer shell of the equipment chassis 1; In the insulation withstand voltage test state: By removing the metal shielding cap 4, the lightning protection grounding post 6 is not in contact with the equipment chassis 1, and the lightning protection circuit 102 does not generate a discharge path for the equipment chassis 1, so the insulation withstand voltage test of the power supply line can be carried out.

[0034] The above embodiments of the specific implementation manner have been described, but this embodiment is not limited to the above specific implementation manner. The above specific implementation manner is only illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this embodiment.

Claims

1. A lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding, comprising a device chassis (1); characterized in that: A filter protection circuit board (101) is installed on one side of the interior of the device chassis (1), a lightning protection circuit (102) is installed on the surface of the filter protection circuit board (101), a lightning protection grounding column (6) is installed on one side of the device chassis (1), a metal welding piece (3) is installed on the outer side of the lightning protection grounding column (6) close to one end of the device chassis (1), a lightning protection grounding wire (2) is installed between the metal welding piece (3) and the lightning protection circuit (102), a metal shielding cap (4) is installed on the outer side of one end of the lightning protection grounding column (6) away from the lightning protection grounding wire (2), and a power port connector (103) is installed on one end of the outer wall of the device chassis (1) close to the metal shielding cap (4).

2. The lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding according to claim 1 is characterized in that: An insulating device (5) is installed inside the equipment chassis (1), and a lightning protection grounding column (6) passes through the inside of the insulating device (5).

3. The lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding according to claim 1 is characterized in that: Locking nuts (601) are installed on the outer sides of the lightning protection grounding column (6) close to both ends of the insulating device (5).

4. The lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding according to claim 1 is characterized in that: A metal clamp (7) is installed on one side of the outer wall of the equipment chassis (1) close to the metal shielding cap (4).

5. The lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding according to claim 1 is characterized in that: A connecting ring (401) is rotatably mounted on the outer wall of the metal shielding cap (4), a limiting block (403) is mounted on the outer surface of the connecting ring (401), an anti-dropping block (404) is mounted on one end of the limiting block (403) away from the connecting ring (401), a guide groove (703) is provided inside the metal clamp (7), and the limiting block (403) and the anti-dropping block (404) pass through the inside of the guide groove (703).

6. The lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding according to claim 5 is characterized in that: A connecting spring (402) is installed inside the connecting ring (401), and the other end of the connecting spring (402) is connected to a limiting block (403).

7. The lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding according to claim 5 is characterized in that: The outer wall of the metal shielding cap (4) is provided with a groove (405), and the inner wall of the connecting ring (401) is provided with a convex ring (406), and the convex ring (406) is located inside the groove (405).

8. The lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding according to claim 5 is characterized in that: An insert block (8) is installed on a side of the anti-drop block (404) close to the device chassis (1); a positioning block (701) is installed on a surface of the metal clamp (7) close to the insert block (8); the insert block (8) is located inside the positioning block (701); a positioning pin (702) is installed on the top of the positioning block (701); and the bottom of the positioning pin (702) is located inside the insert block (8).

9. The lightning protection grounding device that meets the requirements of insulation withstand voltage test and electromagnetic shielding according to claim 8 is characterized in that: One side of the bottom of the positioning pin (702) is an inclined surface.

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