Lightning arrester

Abstract

The utility model discloses a lightning arrester relates to lightning arrester technical field, including lower cantilever and upper cantilever, and the upper cantilever bottom fixedly connected with the suspension mechanism, and the lower cantilever bottom fixedly connected with the hook, and the lower cantilever is fixedly connected with the insulator string between the upper cantilever, and the lightning arrester is arranged between the hook and the upper cantilever, and the lightning arrester bottom fixedly connected with the disengager, and the lightning arrester top fixedly connected with the pull -ring mechanism, and the disengager one side fixedly connected with the overhang wire clamp, and the overhang wire clamp swing joint is in the hook, and the pull -ring mechanism top is then connected in the suspension mechanism. The buffer mechanism of hook both sides can be when the swing of lightning arrester overvoltage, with the cooperation of metal buffer sheet and insert buckle, card seat, effectively buffer swing impact force, avoid the assembly because of high -speed swing and collide surrounding equipment, prevent the rupture of insulating cover, valve piece is damaged, simultaneously, can avoid lightning arrester because of the rotation strength too big and lead to overhang wire clamp from the hook and separate, eliminate the safety accident and line fault caused by direct drop.

Description

Technical Field

[0001] This utility model relates to the field of surge arrester technology, and particularly to surge arresters. Background Technology

[0002] Surge arresters are overvoltage protection devices for power systems and electrical equipment. They are mainly used to protect against direct lightning strikes, induced lightning overvoltages, and operational overvoltages caused by system operation, so as to prevent equipment insulation from being broken down and damaged. A drop-out surge arrester is a new type of surge arrester that integrates overvoltage protection and fault isolation functions. During normal operation, the disconnector remains closed, and the surge arrester exhibits high impedance, allowing only microampere-level leakage current to flow. In the event of lightning or operational overvoltage, the valve plate instantaneously conducts low-resistance leakage current, clamping the voltage. If the surge arrester continues to conduct large current due to a fault, the gas-generating element inside the disconnector heats up and generates gas, causing the drive mechanism to trip, resulting in the surge arrester assembly falling along the axis and disconnecting the fault circuit. At the same time, the drop-out state provides a visual indication of equipment faults. However, if the surge arrester assembly of a drop-out surge arrester rotates too fast during the fall, the high-speed swing can cause the assembly to violently collide with the tower, crossarm, or surrounding equipment below, leading to rupture of the insulation jacket, damage to the internal zinc oxide valve plate, and even deformation of the assembly and detachment of parts, causing damage to surrounding equipment. Furthermore, the excessively fast swing speed can easily cause the surge arrester to bounce after being restricted in rotation, thus causing the surge arrester to detach from the hook and pose a risk of injuring personnel or damaging facilities below. Utility Model Content

[0003] The purpose of this invention is to provide a surge arrester that can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A surge arrester includes a lower cantilever and an upper cantilever. A suspension mechanism is fixedly connected to the bottom of the upper cantilever, and a hook is fixedly connected to the bottom of the lower cantilever. An insulator string is fixedly connected between the lower and upper cantilever. A surge arrester is installed between the hook and the upper cantilever. A release device is fixedly connected to the bottom of the surge arrester, and a pull ring mechanism is fixedly connected to the top of the surge arrester. A suspension clamp is fixedly connected to one side of the release device. The suspension clamp is movably connected to the hook. The top of the pull ring mechanism is engaged with the suspension mechanism. Buffer mechanisms are provided on both sides of the hook. Each buffer mechanism includes a side plate. A first fixed seat and a second fixed seat are fixedly connected to the side plate relative to the hook. A retaining seat is movably connected to one side of the first fixed seat. The side of the second fixed seat opposite to the side plate is fixedly connected to the hook. A metal buffer plate is fixedly connected to the side of the second fixed seat relative to the retaining seat.

[0005] As a further optimization of this utility model, hook grooves are provided on both sides of the hook, which can provide conditions for the hanging connection and rotation of the suspension clamp and the hook.

[0006] As a further optimization of this utility model, a rotating groove is provided on the outer side of the first fixed base to provide conditions and guidance for the installation and rotation of the card seat.

[0007] As a further optimization of this utility model, the card holder has a card slot, the longitudinal section of the card slot is polygonal, and a fixed spoke is fixedly connected to one side of the card holder. The fixed spoke is rotatably connected to the rotating groove. That is, the card holder is rotatably connected to one side of the first fixed seat through the fixed spoke. When the fixed shaft on one side of the suspension clamp is rotatably connected to the hook groove, the card block is engaged in the corresponding card slot. Thus, when the surge arrester drives the release device and the suspension clamp to rotate, the fixed shaft and the card block will synchronously drive the card holder to rotate.

[0008] As a further optimization of this utility model, a counterweight is fixedly connected to the outer side of the card holder to act as a counterweight, so that the opening position of the inner side of the card slot is consistent with the opening position of the hook slot, ensuring the smooth installation of the fixed shaft and the card block. A buckle is fixedly connected to the bottom of the counterweight. The buckle is bent to provide a locking part on the side away from the counterweight. The side plate is bent to provide a limiting part near the locking part. This allows the card block to drive the card holder, counterweight, and buckle to rotate synchronously when the surge arrester rotates around the fixed shaft after the release device explodes. The buckle is then locked into the through groove in the metal buffer plate through the locking part. The metal buffer plate, buckle, and card holder work together to buffer the suspension clamp, thereby preventing the swaying surge arrester from hitting nearby cables or other electrical equipment. At the same time, it prevents the swaying force of the surge arrester from being too great, which could cause the suspension clamp to detach from the hook.

[0009] As a further optimization of this utility model, a fixed shaft is fixedly connected to both sides of the suspension clamp, and a locking block is fixedly connected to one side of the fixed shaft. The longitudinal cross-section of the locking block is polygonal. The fixed shaft is rotatably connected in the corresponding hook groove, and the locking block is locked in the corresponding locking groove. This allows the locking block to synchronously drive the locking seat to rotate when the suspension clamp and the fixed shaft rotate in the hook with the axis as the axis.

[0010] Compared with the prior art, the present invention has the following beneficial effects: In this utility model, the buffer mechanism on both sides of the hook can effectively buffer the impact force of the swing when the surge arrester swings down after overvoltage by cooperating with the metal buffer plate, the buckle and the card seat, so as to avoid the component from colliding with the surrounding equipment due to high-speed swing, prevent the insulation jacket from breaking and the valve plate from being damaged. At the same time, it can prevent the surge arrester from detaching from the suspension clamp due to excessive rotation force, and prevent safety accidents and line faults caused by direct fall. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of the hook and buffer mechanism of this utility model; Figure 3 This is a schematic diagram of the card holder structure of this utility model; Figure 4 This is a schematic diagram of the suspension clamp structure of this utility model.

[0012] In the diagram: 1. Lower cantilever; 2. Upper cantilever; 3. Suspension mechanism; 4. Pull ring mechanism; 5. Hook; 6. Insulator string; 7. Release device; 8. Suspension clamp; 9. Buffer mechanism; 10. Side plate; 11. First fixed seat; 12. Second fixed seat; 13. Card seat; 14. Metal buffer plate; 15. Hook groove; 16. Rotary groove; 17. Card groove; 18. Fixed spoke edge; 19. Counterweight block; 20. Snap-in buckle; 21. Carding part; 22. Limiting part; 23. Fixed shaft; 24. Card block; 25. Surge arrester. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0014] like Figures 1-4 As shown, the surge arrester provided by this utility model includes a lower cantilever 1 and an upper cantilever 2. A suspension mechanism 3 is fixedly connected to the bottom of the upper cantilever 2, and a hook 5 is fixedly connected to the bottom of the lower cantilever 1. An insulator string 6 is fixedly connected between the lower cantilever 1 and the upper cantilever 2. A surge arrester 25 is provided between the hook 5 and the upper cantilever 25. A release device 7 is fixedly connected to the bottom of the surge arrester 25, and a pull ring mechanism 4 is fixedly connected to the top of the surge arrester 25. A suspension clamp 8 is fixedly connected to one side of the release device 7. The suspension clamp 8 is movably connected inside the hook 5. The top of the pull ring mechanism 4 is engaged inside the suspension mechanism 3. Buffer mechanisms 9 are provided on both sides of the hook 5. Buffer mechanisms 9 include side plates 10. A first fixed seat 11 and a second fixed seat 12 are fixedly connected to the side plate 10 relative to the side of the hook 5. A card seat 13 is movably connected to one side of the first fixed seat 11. The side of the second fixed seat 12 opposite to the side plate 10 is fixedly connected to one side of the hook 5, and a metal buffer sheet 14 is fixedly connected to the side of the second fixed seat 12 relative to the card seat 13.

[0015] like Figures 2-4As shown, hook grooves 15 are provided on both sides of the hook 5, providing conditions for the hanging connection and rotation of the suspension clamp 8 and the hook 5. A rotating groove 16 is provided on the outer side of the first fixed seat 11, providing conditions and guidance for the installation and rotation of the card seat 13. A card slot 17 is provided in the card seat 13, and the longitudinal section of the card slot 17 is polygonal. A fixed spoke 18 is fixedly connected to one side of the card seat 13, and the fixed spoke 18 is rotatably connected in the rotating groove 16. That is, the card seat 13 is rotatably connected to one side of the first fixed seat 11 through the fixed spoke 18. When the fixed shaft 23 on one side of the suspension clamp 8 is rotatably connected in the hook groove 15, the card block 24 is engaged in the corresponding card slot 17. Thus, when the surge arrester 25 drives the release device 7 and the suspension clamp 8 to rotate, the fixed shaft 23 and the card block 24 will synchronously drive the card seat 13 to rotate. A counterweight block 19 is fixedly connected to the outer side of the card seat 13, which plays the role of counterweight, realizing the card slot 17. The opening position on the inner side of 7 is consistent with the opening position of the hook groove 15, ensuring the smooth installation of the fixed shaft 23 and the locking block 24. The bottom of the counterweight block 19 is fixedly connected to the buckle 20. The buckle 20 is bent with a locking part 21 on the side away from the counterweight block 19. The side plate 10 is bent with a limiting part 22 near the locking part 21. This allows the locking block 24 to drive the locking seat 13, the counterweight block 19, and the buckle 20 to rotate synchronously when the surge arrester 25 rotates around the fixed shaft 23 after the release device 7 explodes. This allows the buckle 20 to be locked into the through groove in the metal buffer plate 14 through the locking part 21. The metal buffer plate 14, the buckle 20, and the locking seat 13 work together to buffer the suspension clamp 8, thereby preventing the lowered surge arrester 25 from hitting nearby cables or other electrical equipment. At the same time, it prevents the suspension clamp 8 from detaching from the hook 5 due to excessive force when the surge arrester 25 swings down.

[0016] like Figure 4 As shown, both sides of the suspension clamp 8 are fixedly connected to a fixed shaft 23, and a locking block 24 is fixedly connected to one side of the fixed shaft 23. The longitudinal section of the locking block 24 is polygonal. The fixed shaft 23 is rotatably connected in the corresponding hook groove 15, and the locking block 24 is locked in the corresponding locking groove 17. When the suspension clamp 8 and the fixed shaft 23 rotate in the hook 5 with the axis as the axis, the locking block 24 synchronously drives the locking seat 13 to rotate.

[0017] It should be noted that this utility model is a surge arrester. Under normal operating conditions of the power system, the surge arrester 25 is engaged in the suspension mechanism 3 at the bottom of the upper cantilever 2 through the top pull ring mechanism 4, and the bottom suspension clamp 8 connected by the release device 7 is movably hung in the hook 5 at the bottom of the lower cantilever 1, so that the whole is kept in a stable installation state. At this time, the surge arrester 25 exhibits high impedance characteristics, allowing only microampere leakage current to pass through, without affecting the normal power supply of the system. At the same time, the insulator string 6 between the lower cantilever 1 and the upper cantilever 2 plays an insulating role, preventing accidental conduction between lines. When encountering lightning or overvoltage caused by operation, the internal valve plate of the surge arrester 25 quickly switches to a low-resistance state, diverting the large current generated by the overvoltage to the ground, rapidly clamping the voltage to the safe withstand range of the equipment, thus achieving overvoltage protection. If the surge arrester 25 continues to conduct a large current, the gas-generating element inside the trip unit 7 will be heated and generate gas, resulting in a burst trip. Then, the surge arrester 25 assembly begins to swing downwards around the fixed shafts 23 on both sides of the suspension clamp 8. During the swing, the fixed shafts 23 of the suspension clamp 8 rotate within the hook groove 15 inside the hook 5, while the fixed shaft 23 on one side... The locking block 24 drives the locking seat 13 to rotate synchronously. The locking seat 13 rotates on one side of the first fixed seat 11 through the fixed spoke 18. The counterweight block 19 on the outside of the locking seat 13 rotates together with the locking seat 13, causing the bottom buckle 20 to move closer to the second fixed seat 12. When the locking part 21 on the side of the buckle 20 away from the counterweight block 19 contacts the metal buffer plate 14 on the second fixed seat 12, the metal buffer plate 14 absorbs the impact force generated by the downward swing of the surge arrester 25 through its own deformation, slows down the downward swing speed, and prevents the surge arrester 25 from colliding with surrounding equipment due to high-speed swing.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A surge arrester, characterized in that: The device includes a lower cantilever (1) and an upper cantilever (2). The bottom of the upper cantilever (2) is fixedly connected to a suspension mechanism (3). The bottom of the lower cantilever (1) is fixedly connected to a hook (5). An insulator string (6) is fixedly connected between the lower cantilever (1) and the upper cantilever (2). A surge arrester (25) is provided between the hook (5) and the upper cantilever (2). The bottom of the surge arrester (25) is fixedly connected to a release device (7). The top of the surge arrester (25) is fixedly connected to a pull ring mechanism (4). A suspension clamp (8) is fixedly connected to one side of the release device (7). The suspension clamp (8) is movably connected to the hook (5). Inside, the top of the pull ring mechanism (4) is snapped into the suspension mechanism (3). Both sides of the hook (5) are provided with buffer mechanisms (9). The buffer mechanism (9) includes a side plate (10). The side plate (10) is fixedly connected to a first fixed seat (11) and a second fixed seat (12) on the side opposite to the hook (5). The first fixed seat (11) is movably connected to a card seat (13). The side of the second fixed seat (12) opposite to the side plate (10) is fixedly connected to the side of the hook (5). The side of the second fixed seat (12) opposite to the card seat (13) is fixedly connected to a metal buffer sheet (14).

2. The surge arrester according to claim 1, characterized in that: Hook grooves (15) are provided on both sides of the hook (5).

3. The surge arrester according to claim 1, characterized in that: A rotating groove (16) is provided on the outer side of the first fixed seat (11).

4. The surge arrester according to claim 3, characterized in that: The card holder (13) has a card slot (17) inside. The longitudinal section of the card slot (17) is polygonal. A fixed spoke (18) is fixedly connected to one side of the card holder (13). The fixed spoke (18) is rotatably connected in the rotating groove (16). That is, the card holder (13) is rotatably connected to one side of the first fixed seat (11) through the fixed spoke (18).

5. The surge arrester according to claim 4, characterized in that: A counterweight (19) is fixedly connected to the outside of the card holder (13). A buckle (20) is fixedly connected to the bottom of the counterweight (19). A locking part (21) is bent on the side of the buckle (20) away from the counterweight (19). A limiting part (22) is bent on the side plate (10) near the locking part (21).

6. The surge arrester according to claim 4, characterized in that: The suspension clamp (8) is fixedly connected to a fixed shaft (23) on both sides. A locking block (24) is fixedly connected to one side of the fixed shaft (23). The longitudinal section of the locking block (24) is polygonal. The fixed shaft (23) is rotatably connected in the corresponding hook groove (15), and the locking block (24) is locked in the corresponding locking groove (17).

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