A lightning protection device connecting fitting and method for live replacement of a lightning protection device

Abstract

The application discloses a connecting fitting of a lightning protection device, which comprises a connecting metal body, an inner metal body, an outer metal body, a rotating nesting structure, a multi-connecting rod folding telescopic structure and front-stage and rear-stage metal electrodes capable of being mutually buckled; one end of the connecting metal body is connected with an insulator on a pole tower, the other end of the connecting metal body is connected with one end of the inner metal body through the rotating nesting structure, and the connecting metal body is fixed with a cross arm on the pole tower; the inner metal body can rotate relative to the connecting metal body through the rotating nesting structure; the other end of the inner metal body is provided with the front-stage metal electrode; the outer metal body is provided with the rear-stage metal electrode on the side close to the inner metal body; the outer metal body is provided with the lightning protection device on the other side; and the inner metal body and the outer metal body are connected through the multi-connecting rod folding telescopic structure. The connecting fitting of the lightning protection device can effectively solve the problems existing in the replacement of the lightning protection device, and meet the demand of live maintenance and replacement operation of uninterrupted power operation.

Description

Technical Field

[0001] This invention relates to the field of lightning protection technology, and in particular to a connection fitting for a lightning protection device and a method for replacing the lightning protection device while it is energized. Background Technology

[0002] Currently, the development of various line lightning protection devices is progressing rapidly. With the widespread application of lightning protection devices, replacing faulty devices has become a frequent task for power supply company metering professionals. Maintenance personnel have found that, over time, when a lightning protection device malfunctions, power outages are required for repair or replacement, resulting in lengthy construction periods.

[0003] When replacing faulty surge protection devices, due to factors such as power supply methods or customer electricity usage, it is often impossible to replace them after a power outage. Replacement must be done while the device is energized. In this case, after removing the faulty surge protection device, the original wiring ends are exposed. For safety reasons, although insulating tape can be used to wrap the exposed wire ends, both wrapping and removing the tape is cumbersome. In actual live-line replacement work, workers often do not wrap the wires. Existing replacement methods easily lead to electric shock or short-circuit arc burns during the replacement process. Furthermore, after removing the faulty surge protection device, the wires will fall downwards under gravity, requiring manual stabilization. Improper operation can lead to electric shock, potentially causing death, posing a significant personal risk. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a connection fitting for a lightning protection device and a method for replacing the lightning protection device while it is energized. This effectively solves the problems existing in the above applications and meets the increasingly strong demand for uninterrupted power supply maintenance and replacement operations.

[0005] The technical solution adopted in this invention is as follows: A connecting fitting for a lightning protection device is installed between the crossarm of a tower and the lightning protection device. The connecting fitting includes a connecting metal body, an inner metal body, an outer metal body, a rotating nested structure, a multi-link folding and telescopic structure, and front-stage metal electrodes and rear-stage metal electrodes that can be interlocked with each other. One end of the connecting metal body is connected to the insulator on the tower, and the other end is connected to one end of the inner metal body through a rotating nesting structure. The inner metal body can rotate relative to the connecting metal body through the rotating nesting structure. The inner metal body is equipped with a pre-stage metal electrode at the other end, and the outer metal body is equipped with a post-stage metal electrode on the side close to the inner metal body. A lightning protection device is installed on the other side of the outer metal body. The inner metal body and the outer metal body are connected by a multi-link folding telescopic structure, and the extension and retraction of the outer metal body through the multi-link folding telescopic structure can drive the lightning protection device to move relative to the inner metal body.

[0006] Furthermore, when the connecting metal body, inner metal body, outer metal body, rotating nested structure, front-stage metal electrode, and rear-stage metal electrode are contracted and overlapped in the multi-link folding and telescopic structure, they form a metal channel between the grounding end of the lightning protection device and the crossarm.

[0007] Furthermore, the rotating nested structure is a universal joint coupling equipped with a damper, a ball joint bearing, or a robotic arm joint, and the rotation direction of the rotating nested structure is vertical.

[0008] Furthermore, the multi-link folding telescopic structure includes six insulating connecting rods, which form two parallelograms; the telescopic direction of the multi-link folding telescopic structure is horizontal.

[0009] Furthermore, the rear metal electrode is provided with a plug that mates with the front metal electrode, and the front metal electrode is provided with a slot that mates with the plug. The front metal electrode and the rear metal electrode can be connected through the plug and the slot.

[0010] Furthermore, the plug has a semi-circular protrusion, and the slot has a groove that matches the semi-circular protrusion. The protrusion on the plug and the groove in the slot form a snap-fit ​​structure.

[0011] Furthermore, the connecting metal body is provided with a pin structure, which can be connected to the crossarm on the tower through the pin structure; the outer metal body is provided with a force-bearing hook.

[0012] Furthermore, the connecting hardware of the lightning protection device also includes a metal baffle. The metal baffle is installed on the connecting metal body through a pin structure. The metal baffle and the crossarm are located on both sides of the connecting metal body, which can guide the rotation of the inner metal body.

[0013] A method for replacing a surge protector that can be replaced while energized, the method being based on the aforementioned connection hardware of the surge protector, includes the following steps: Step 1: Climb the pole to a safe distance of 1 meter from the crossarm, hook the insulated pole onto the load-bearing hook on the outer metal body, and pull down the connecting hardware of the lightning protection device; Step 2: The connecting hardware of the lightning protection device rotates the inner metal body, outer metal body, multi-link folding and telescopic structure, and lightning protection device vertically downward through the rotating nesting structure. At the same time, the front-stage metal electrode and the rear-stage metal electrode are disengaged, and the metal channel formed by the connecting metal body, inner metal body, outer metal body, rotating nesting structure, front-stage metal electrode and rear-stage metal electrode is disconnected. Step 3: After the inner metal body rotates vertically downward to the maximum displacement point, the multi-link folding telescopic structure extends to form insulation. At this time, the lightning protection device connected to the outer metal body is replaced. Step 4: By hooking the insulating rod onto the top outer metal body, the connecting hardware of the lightning protection device is restored to its initial horizontal state. At the same time, the outer metal body is moved forward, so that the front-stage metal electrode and the rear-stage metal electrode are reconnected, and the multi-link folding and telescopic structure contracts and overlaps.

[0014] The beneficial effects of this invention are: The connecting hardware of this lightning protection device, through the connecting metal body, inner metal body, outer metal body, rotating nested structure, front-stage metal electrode, and rear-stage metal electrode, forms a metal channel between the grounding terminal of the lightning protection device and the crossarm when the multi-link folding and telescopic structure contracts and overlaps, thus meeting the installation requirements of the lightning protection device. At the same time, by setting a rotating nested structure between the connecting metal body and the inner metal body, the rear section of the connecting hardware of the lightning protection device and the lightning protection device can be vertically rotated relative to the tower insulator, crossarm, etc. when replacement is required, so as to facilitate the replacement operation of the lightning protection device.

[0015] In addition, the connecting hardware of the lightning protection device uses a multi-link folding and telescopic structure to cooperate with the front and rear metal electrodes that can be interlocked. When replacing the lightning protection device, the metal channel is disconnected at the same time, forming an insulation isolation, which makes it easy to replace the lightning protection device at the rear end within a safe distance.

[0016] Since the entire replacement and reset process of the lightning protection device can be carried out using an insulated rod, the arc-extinguishing lightning protection device can be replaced while energized, without the need for cumbersome procedures such as wrapping exposed wire ends and fixing wires. This meets the increasingly strong demand for uninterrupted power supply maintenance and replacement operations. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 A schematic diagram of the overall structure of the connecting hardware for a lightning protection device; Figure 2 , Figure 3 , Figure 4 This is a schematic diagram showing the connection between the connecting metal body and the inner metal body. Figure 5 This is a schematic diagram showing the connection hardware of a lightning protection device during the replacement of the lightning protection device. In the diagram, 1—connecting metal body, 2—inner metal body, 3—outer metal body, 4—rotational nesting structure, 5—multi-link folding telescopic structure, 6—front-stage metal electrode, 7—rear-stage metal electrode, 8—lightning protection device, 9—universal joint coupling, 10—ball joint bearing, 11—manipulator joint, 12—plug, 13—slot, 14—semi-circular protrusion, 15—pin structure, 16—crossarm, 17—force-bearing hook, 18—metal baffle. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] To address the cumbersome procedures involved in replacing faulty lightning protection devices in power systems, such as wrapping wire ends and securing conductors, this embodiment provides a connection fitting for lightning protection devices. This fitting allows for live-line maintenance and replacement under energized conditions, eliminating the aforementioned cumbersome procedures and ensuring safety during the replacement process. Figure 1 As shown, the connecting hardware of the lightning protection device consists of a connecting metal body 1, an inner metal body 2, an outer metal body 3, a rotating nested structure 4, a multi-link folding and telescopic structure 5, and a front-stage metal electrode 6 and a rear-stage metal electrode 7 that can be interlocked with each other.

[0020] like Figure 1 As shown, the front end of the connecting metal body 1 is provided with a socket, and the connecting metal body 1 can be connected to the insulator on the pole through the socket. The connecting metal body 1 is provided with a pin structure 15, and the connecting metal body 1 can be connected to the crossarm 16 on the pole through the pin structure 15, so that the connecting metal body 1 is relatively fixed relative to the crossarm 16 and the insulator of the pole.

[0021] like Figure 1 As shown, the rear end of the connecting metal body 1 is connected to the front end of the inner metal body 2 via a rotating nested structure 4. The inner metal body 2 can rotate relative to the connecting metal body 1 via the rotating nested structure 4, and the rotation direction is vertical. Figure 2 , Figure 3 , Figure 4As shown, the rotating nested structure 4 can be a universal joint coupling 9 with a damper, a ball joint bearing 10, or a robotic arm joint 11. For example, a damper can be installed inside the universal joint coupling 9 with a cross bearing manufactured by Houzhe Transmission; a ball joint bearing with built-in damping manufactured by Airtac; or a robotic arm joint with built-in damper manufactured by Zero Differential Control. Because it has a damper, the rotating nested structure 4 can ensure that the inner metal body 2 and other structures behind the inner metal body 2 have a certain degree of stability under non-external force.

[0022] like Figure 1 As shown, a pre-stage metal electrode 6 is installed at the rear end of the inner metal body 2, and a post-stage metal electrode 7 is installed at the front end of the outer metal body 3, near the inner metal body 2. A lightning protection device is installed at the rear end of the outer metal body 3. The post-stage metal electrode 7 has a plug 12 that mates with the pre-stage metal electrode 6, and the pre-stage metal electrode 6 has a slot 13 that mates with the plug 12. The pre-stage metal electrode 6 and the post-stage metal electrode 7 can be connected via the plug 12 and slot 13. After the pre-stage metal electrode 6 and the post-stage metal electrode 7 come into contact, the connecting metal body 1, inner metal body 2, outer metal body 3, rotating nested structure 4, pre-stage metal electrode 6, and post-stage metal electrode 7 form a metal channel between the grounding terminal of the lightning protection device and the crossarm 16, ensuring the effective operation of the lightning protection device. The lightning protection device can employ a recoil compression arc extinguishing device, a super-strong arc extinguishing device, a hydroelectric effect arc extinguishing device, a multi-chamber arc extinguishing device, etc.

[0023] like Figure 1 As shown, the inner metal body 2 and the outer metal body 3 are connected by a multi-link folding telescopic structure 5. The multi-link folding telescopic structure 5 consists of six insulated connecting rods forming two parallelograms. The multi-link folding telescopic structure 5 is installed on the front-stage metal electrode 6 and the rear-stage metal electrode 7. Due to the unstable shape of the parallelograms, the outer metal body 3 can move the lightning protection device relative to the inner metal body 2 through the expansion and contraction of the multi-link folding telescopic structure 5, and the expansion and contraction direction of the multi-link folding telescopic structure 5 is horizontal. Figure 5 As shown, since the extension and retraction direction of the multi-link folding telescopic structure 5 and the rotation direction of the rotating nested structure 4 are not on the same plane, the overall stability of the connecting hardware of the lightning protection device can be guaranteed.

[0024] like Figure 1 and Figure 5 As shown, when the multi-link folding telescopic structure 5 extends, the front-stage metal electrode 6 and the rear-stage metal electrode 7 disengage. Since the multi-link folding telescopic structure 5 uses insulating material, it forms an insulating barrier, ensuring that the replacement of the lightning protection device 8 is performed within a safe distance. When the multi-link folding telescopic structure 5 retracts and overlaps, the front-stage metal electrode 6 and the rear-stage metal electrode 7 regain contact, ensuring that the lightning protection device 8 can operate effectively.

[0025] The connecting hardware of the lightning protection device, through connecting metal body 1, inner metal body 2, outer metal body 3, rotating nested structure 4, front-stage metal electrode 6, and rear-stage metal electrode 7, forms a metal channel between the grounding terminal of the lightning protection device 8 and the crossarm 16 when the multi-link folding and telescopic structure 5 is contracted and overlapped, thus meeting the installation requirements of the lightning protection device 8; for example Figure 5 As shown, by setting a rotating nested structure 4 between the connecting metal body 1 and the inner metal body 2, the rear section of the connecting hardware of the lightning protection device and the lightning protection device 8 can be vertically rotated relative to the tower insulator, crossarm 16, etc., when replacement is required. The maximum rotation range is 90°, which facilitates the replacement of the lightning protection device 8. Through the multi-link folding telescopic structure 5 in conjunction with the front and rear metal electrodes 6 and 7, the metal channel is disconnected and an insulating isolation is formed when replacing the lightning protection device 8, which is located at the rear end, so that the replacement of the lightning protection device 8 can be carried out from a safe distance. Since the personnel are at a safe distance during replacement, there is no need to consider the problem of wrapping the wire ends. After using the connecting hardware of this lightning protection device, the corresponding wire only needs to be reserved to allow the inner metal body 2 and the rear section to rotate. The remaining section of the wire is fixed, thus eliminating the need to consider the cumbersome procedures of wire fixing.

[0026] Furthermore, to ensure a certain level of stability after the front-stage metal electrode 6 and the rear-stage metal electrode 7 come into contact; such as... Figure 1 As shown, in this embodiment, a semi-circular protrusion 14 is provided on the plug 12 of the rear-stage metal electrode 7, and a groove matching the semi-circular protrusion 14 is provided in the slot 13 of the front-stage metal electrode 6. The protrusion on the plug 12 and the groove in the slot 13 form a snap-fit ​​structure, thereby ensuring that the front-stage metal electrode 6 and the rear-stage metal electrode 7 have a certain stability after contact, and can always maintain contact under non-external force. At the same time, considering the guiding nature of the vertical rotation of the connecting hardware of the lightning protection device, such as Figure 1 and Figure 5 As shown, in this embodiment, a metal baffle 18 is also installed. The metal baffle 18 is installed on the connecting metal body 1 via a pin structure 15. The metal baffle 18 and the crossarm 16 are located on both sides of the connecting metal body 1, respectively, and can guide the rotation of the inner metal body 2. Furthermore, since the lightning protection device 8 needs to be replaced without power interruption after using the connecting hardware of this lightning protection device, therefore... Figure 5 As shown, in this embodiment, a force-bearing hook 17 that can be operated in conjunction with an insulating rod is installed at the bottom of the outer metal body 3.

[0027] In summary, based on the connection hardware of the above-mentioned lightning protection device, the following steps can be performed to perform a live-line replacement operation of lightning protection device 8: First, climb the pole to a safe distance of 1 meter from the crossarm, hook the insulating rod onto the force-bearing hook 17 on the outer metal body 3, and pull down the connecting hardware of the lightning protection device; further, the connecting hardware of the lightning protection device, through the rotating nesting structure 4, causes the inner metal body 2, outer metal body 3, multi-link folding telescopic structure 5, and lightning protection device 8 to rotate vertically downwards, while the front-stage metal electrode 6 and the rear-stage metal electrode 7 disengage, breaking the metal channel formed by the connecting metal body 1, inner metal body 2, outer metal body 3, rotating nesting structure 4, front-stage metal electrode 6, and rear-stage metal electrode 7; even further, after the inner metal body 2 rotates vertically downwards to the maximum displacement point, the multi-link folding telescopic structure 5 extends, forming an insulating isolation, such as... Figure 5 As shown, the lightning protection device 8 connected to the outer metal body 3 is replaced at this time; finally, by hooking the insulating rod onto the force-bearing hook 17 on the top outer metal body 3, the connecting hardware of the lightning protection device is restored to the initial horizontal state. At the same time, the outer metal body 3 is moved forward so that the front metal electrode 6 and the rear metal electrode 7 are reconnected. The multi-link folding telescopic structure 5 retracts and overlaps, completing the replacement operation of the entire lightning protection device 8.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A connecting fitting for a lightning protection device, characterized in that: The connecting fittings of the lightning protection device are installed between the tower crossarm and the lightning protection device. They include a connecting metal body, an inner metal body, an outer metal body, a rotating nested structure, a multi-link folding and telescopic structure, and front-stage metal electrodes and rear-stage metal electrodes that can be interlocked with each other. One end of the connecting metal body is connected to the insulator on the tower, and the other end is connected to one end of the inner metal body through a rotating nesting structure. The inner metal body can rotate relative to the connecting metal body through the rotating nesting structure. The inner metal body is equipped with a pre-stage metal electrode at the other end, and the outer metal body is equipped with a post-stage metal electrode on the side close to the inner metal body. A lightning protection device is installed on the other side of the outer metal body. The inner metal body and the outer metal body are connected by a multi-link folding telescopic structure, and the extension and retraction of the outer metal body through the multi-link folding telescopic structure can drive the lightning protection device to move relative to the inner metal body.

2. The connecting fittings for the lightning protection device according to claim 1, characterized in that: The connecting metal body, inner metal body, outer metal body, rotating nested structure, front-stage metal electrode, and rear-stage metal electrode form a metal channel between the grounding end of the lightning protection device and the crossarm when the multi-link folding and telescopic structure contracts and overlaps.

3. The connecting fittings for the lightning protection device according to claim 1, characterized in that: The rotating nested structure is a universal joint coupling with a damper, a ball joint bearing, or a robotic arm joint, and the rotation direction of the rotating nested structure is vertical.

4. The connecting fittings for the lightning protection device according to claim 1, characterized in that: The multi-link folding telescopic structure includes six insulated connecting rods, which form two parallelograms; the telescopic direction of the multi-link folding telescopic structure is horizontal.

5. The connecting fittings for the lightning protection device according to claim 1, characterized in that: The rear metal electrode is provided with a plug that matches the front metal electrode, and the front metal electrode is provided with a slot that matches the plug. The front metal electrode and the rear metal electrode can be connected through the plug and the slot.

6. The connecting fittings for the lightning protection device according to claim 5, characterized in that: The plug has a semi-circular protrusion, and the slot has a groove that matches the semi-circular protrusion. The protrusion on the plug and the groove in the slot form a snap-fit ​​structure.

7. The connecting fittings for the lightning protection device according to claim 1, characterized in that: The connecting metal body is provided with a pin structure, which can be connected to the crossarm on the tower through the pin structure; the outer metal body is provided with a force-bearing hook.

8. The connecting fittings for the lightning protection device according to claim 7, characterized in that: The connection fittings of the lightning protection device also include a metal baffle. The metal baffle is installed on the connecting metal body through a pin structure. The metal baffle and the crossarm are located on both sides of the connecting metal body, which can guide the rotation of the inner metal body.

9. A method for replacing a surge protection device that can be replaced while energized, the method being based on the connecting hardware of the surge protection device according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Climb the pole to a safe distance of 1 meter from the crossarm, hook the insulated pole onto the load-bearing hook on the outer metal body, and pull down the connecting hardware of the lightning protection device; Step 2: The connecting hardware of the lightning protection device rotates the inner metal body, outer metal body, multi-link folding and telescopic structure, and lightning protection device vertically downward through the rotating nesting structure. At the same time, the front-stage metal electrode and the rear-stage metal electrode are disengaged, and the metal channel formed by the connecting metal body, inner metal body, outer metal body, rotating nesting structure, front-stage metal electrode and rear-stage metal electrode is disconnected. Step 3: After the inner metal body rotates vertically downward to the maximum displacement point, the multi-link folding telescopic structure extends to form insulation. At this time, the lightning protection device connected to the outer metal body is replaced. Step 4: By hooking the insulating rod onto the top outer metal body, the connecting hardware of the lightning protection device is restored to its initial horizontal state. At the same time, the outer metal body is moved forward, so that the front-stage metal electrode and the rear-stage metal electrode are reconnected, and the multi-link folding and telescopic structure contracts and overlaps.

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