Lightning protection mechanism for a field transformer

Abstract

The utility model discloses a kind of lightning protection mechanism of excitation transformer, comprising: excitation transformer body;Lightning protection mechanism, lightning protection mechanism slidingly connects in four sides of excitation transformer body, lightning protection mechanism includes one main lightning rod and three auxiliary lightning rods, one main lightning rod is located in the side surface of excitation transformer body and is arranged, and three auxiliary lightning rods are located in other three side surfaces of excitation transformer body and are arranged;The utility model is preliminarily adjusted by the lifting mechanism of setting, this design facilitates the preliminary adjustment of the overall height of lightning protection mechanism, so that lightning protection mechanism remains to extend the upper end of excitation transformer when using, in the case of carrying and non-use, lightning protection mechanism can be slid down and stored in the four side surfaces of excitation transformer body, to reduce the overheight part of lightning protection mechanism and reduce the occupation of height space, to prevent lightning protection mechanism too much protruding to cause interference to carrying and storage.

Description

Technical Field

[0001] This utility model relates to the technical field of lightning protection mechanisms, specifically a lightning protection mechanism for an excitation transformer. Background Technology

[0002] In modern power systems, excitation transformers, as core equipment for power transmission and conversion, undertake the critical task of providing excitation power to generators. Their stable operation is directly related to the reliability and safety of the power system. However, excitation transformers are extremely susceptible to lightning strikes during outdoor operation. The powerful lightning current can generate overvoltage and overcurrent, which may lead to transformer insulation damage, internal component burnout, or even large-scale power outages, causing huge economic losses and social impacts. Currently, the common lightning protection technology for excitation transformers mainly adopts lightning rod arrays. Lightning rod arrays are used to reduce the probability of "flashover blind spots". However, multiple lightning rods are usually fixed on the excitation transformer, which makes it inconvenient to switch the height of multiple lightning rods in a centralized manner. Such lightning rod arrays that extend too far out of the top of the excitation transformer are prone to collision damage during equipment handling and maintenance. Moreover, they occupy a lot of space when not in use, affecting the convenience of equipment storage and transportation. In addition, there is a height difference between the main lightning rods and the auxiliary lightning rods when they are arranged in the array. The uneven lightning rod array will further affect the convenience of equipment handling and storage. Therefore, there is a need for a lightning protection mechanism for excitation transformers to solve the problems existing in the current technology. Utility Model Content

[0003] The purpose of this utility model is to provide a lightning protection mechanism for excitation transformers to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a lightning protection mechanism for an excitation transformer, comprising: Excitation transformer body; A lightning protection mechanism is slidably connected to the four sides of the excitation transformer body. The lightning protection mechanism includes one main lightning rod and three auxiliary lightning rods. One main lightning rod is located on one side of the excitation transformer body, and the three auxiliary lightning rods are located on the other three sides of the excitation transformer body. A lifting mechanism is slidably connected to the outside of the excitation transformer body, and the lifting mechanism is used for centralized lifting of the lightning protection mechanism; A height adjustment mechanism is installed and fixed inside the lifting mechanism, and the height adjustment mechanism is used to adjust the height of the main lightning rod.

[0005] Preferably, the lifting mechanism includes a lifting bracket, which is slidably connected to the outside of the excitation transformer body. A positioning stud is fixed on the upper end face of the lifting bracket, and telescopic slides are fixed on all four sides of the excitation transformer body.

[0006] Preferably, the positioning stud is slidably connected in the sliding hole of the telescopic slide, and the upper end of the positioning stud is threaded with an anti-fall knob.

[0007] Preferably, the height adjustment mechanism includes a height adjustment slide, which is fixed inside the lifting bracket, and a lifting slider is slidably connected inside the height adjustment slide. The lower end of the main lightning rod is fixed to the top of the lifting slider.

[0008] Preferably, the inner wall of the height adjustment sliding shell is provided with a guide groove that matches the sliding of the lifting slider, and the main lightning rod is slidably connected inside the height adjustment sliding shell.

[0009] Preferably, a wire hole is provided at the center of the upper end face of the lifting slider, and a through hole is provided on the inner bottom wall of the height adjustment slide, with the wire hole and the through hole aligned.

[0010] Preferably, a locking screw hole is provided on one side surface of the lifting slider, and a locking stud is connected to the internal thread of the locking screw hole. A first gear hole and a second gear hole are provided on one side surface of the height adjustment slide. The first gear hole is located above the second gear hole, and both the first gear hole and the second gear hole are connected to the guide groove.

[0011] Preferably, both the main lightning rod and the auxiliary lightning rod have a grounding wire fixed at their lower ends.

[0012] This utility model provides a lightning protection mechanism for excitation transformers, which has the following advantages compared with the prior art: With the support mechanism in place, this design facilitates the initial adjustment of the overall height of the lightning protection mechanism. When in use, the lightning protection mechanism extends beyond the top of the excitation transformer. When not in use, the lightning protection mechanism can slide down and be stored on the four sides of the excitation transformer body. This reduces the excessive height of the lightning protection mechanism and minimizes the space occupied, preventing the lightning protection mechanism from protruding too much and interfering with handling and storage.

[0013] With the height adjustment mechanism, the height of the main lightning rod and the secondary lightning rod can be quickly switched to a high-low structure according to the actual lightning environment. This allows them to work together to eliminate the "flashover blind zone" of a single rod, forming a better lightning protection range, effectively intercepting lightning, and dispersing lightning energy to reduce the damage of lightning strikes to the excitation transformer. Attached Figure Description

[0014] Figure 1 This is a perspective view of the overall structure of this utility model; Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a three-dimensional view of the main lightning rod structure of this utility model; Figure 4 This is a three-dimensional view of the height adjustment mechanism of this utility model; Figure 5 This is a three-dimensional cross-sectional view of the height-adjustable sliding shell structure of this utility model; Figure 6 This is a perspective view of the first gear hole structure of this utility model; Figure 7 This is a three-dimensional view of the lifting slider structure of this utility model.

[0015] In the diagram: 1. Excitation transformer body; 2. Main lightning rod; 3. Auxiliary lightning rod; 4. Lifting mechanism; 5. Height adjustment mechanism; 6. Lifting bracket; 7. Telescopic slide; 8. Positioning stud; 9. Anti-fall knob; 10. Height adjustment slide; 11. Lifting slider; 12. Guide groove; 13. First gear hole; 14. Second gear hole; 15. Locking stud; 16. Through hole; 17. Locking screw hole; 18. Wire hole; 19. Grounding wire. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-7 This utility model provides a lightning protection mechanism for an excitation transformer, comprising: Excitation transformer body 1; The lightning protection mechanism is slidably connected to the four sides of the excitation transformer body 1. The lightning protection mechanism includes one main lightning rod 2 and three auxiliary lightning rods 3. The main lightning rod 2 is located on one side of the excitation transformer body 1, and the three auxiliary lightning rods 3 are located on the other three sides of the excitation transformer body 1. The lower ends of the main lightning rod 2 and the auxiliary lightning rods 3 are all fixed with grounding wires 19. Among them, the main lightning rod 2 and the auxiliary lightning rod 3 together form a lightning protection line. Once struck by lightning, the lightning will be attracted by the lightning rods and then introduced into the ground through the grounding wire 19 fixed at the lower end, thereby preventing the excitation transformer body 1 from being damaged by lightning and ensuring the stable operation of the power system.

[0018] Lifting mechanism 4 is slidably connected to the outside of the excitation transformer body 1. Lifting mechanism 4 is used for centralized lifting of lightning protection mechanism. This facilitates the initial adjustment of the overall height of the lightning protection mechanism, allowing it to extend beyond the top of the excitation transformer during use. In the absence of handling or use, the lightning protection mechanism can slide down and be stored on the four sides of the excitation transformer body 1, thereby reducing the excessive height of the lightning protection mechanism and minimizing the space occupied by it. This prevents the lightning protection mechanism from protruding too much and interfering with handling and storage.

[0019] The height adjustment mechanism 5 is installed and fixed inside the lifting mechanism 4. The height adjustment mechanism 5 is used to adjust the height of the main lightning rod 2. When using lightning protection, the height of the main lightning rod 2 can be switched. The lifting slider 11 is controlled to slide in the guide groove 12 inside the height adjustment slide 10. The lower end of the main lightning rod 2 is fixed to the top of the lifting slider 11. When the lifting slider 11 is adjusted from the second position hole 14 to the first position hole 13, the locking stud 15 is passed through the first position hole 13 and screwed into the locking screw hole 17 of the lifting slider 11 to fix the height of the main lightning rod 2.

[0020] It is worth noting that the lifting mechanism 4 includes a lifting bracket 6, which is slidably connected to the outside of the excitation transformer body 1. The upper end face of the lifting bracket 6 is fixed with a positioning stud 8, and telescopic slides 7 are fixed on all four sides of the excitation transformer body 1.

[0021] It is worth noting that the positioning stud 8 is slidably connected in the sliding hole of the telescopic slide 7, and the upper end of the positioning stud 8, which protrudes from the telescopic slide 7, is threaded with an anti-fall knob 9.

[0022] It is worth noting that the height adjustment mechanism 5 includes a height adjustment slide 10, which is fixed inside the lifting bracket 6. A lifting slider 11 is slidably connected inside the height adjustment slide 10. The lower end of the main lightning rod 2 is fixed to the top of the lifting slider 11. A guide groove 12 that slides and matches the lifting slider 11 is opened on the inner wall of the height adjustment slide 10. The main lightning rod 2 is slidably connected inside the height adjustment slide 10. A locking screw hole 17 is opened on one side surface of the lifting slider 11. A locking stud 15 is threaded inside the locking screw hole 17. A first gear hole 13 and a second gear hole 14 are opened on one side surface of the height adjustment slide 10. The first gear hole 13 is located above the second gear hole 14. Both the first gear hole 13 and the second gear hole 14 are connected to the guide groove 12. When adjusting the height, the lifting bracket 6 in the lifting mechanism 4 is slidably connected to the outside of the excitation transformer body 1 through the positioning stud 8 and the telescopic slide 7. The height position of the lifting bracket 6 can be fixed by rotating the anti-fall knob 9 along the positioning stud 8 and cooperating with the telescopic slide 7.

[0023] It is worth noting that a wire hole 18 is provided at the center of the upper end face of the lifting slider 11, and a through hole 16 is provided on the inner bottom wall of the height adjustment slide 10. The wire hole 18 and the through hole 16 are aligned.

[0024] In power systems, excitation transformers, as critical equipment, are frequently exposed to lightning strikes. Lightning protection mechanisms can effectively reduce the damage caused by lightning strikes to excitation transformers. The lightning protection mechanism in this solution operates as follows: The lightning protection mechanism consists of one main lightning rod 2 and three auxiliary lightning rods 3. It is installed on a lifting bracket 6 within a lifting mechanism 4. During height adjustment, the lifting bracket 6 in the lifting mechanism 4 is slidably connected to the outside of the excitation transformer body 1 via a positioning stud 8 and a telescopic slide 7. Rotating the anti-fall knob 9 along the positioning stud 8, which engages with the telescopic slide 7, fixes the height position of the lifting bracket 6. This design facilitates the initial adjustment of the overall height of the lightning protection mechanism, ensuring that it extends beyond the top of the excitation transformer during use. During transport and when not in use, the lightning protection mechanism can slide down and be stored on the four sides of the excitation transformer body 1, reducing the excessive height of the lightning protection mechanism and minimizing its space requirements. This prevents the lightning protection mechanism from protruding excessively and interfering with transport and storage.

[0025] When used for lightning protection, the height of the main lightning rod 2 can be switched. The lifting slider 11 is controlled to slide in the guide groove 12 inside the height adjustment housing 10. The lower end of the main lightning rod 2 is fixed to the top of the lifting slider 11. When the lifting slider 11 is adjusted from the second position hole 14 to the first position hole 13, the locking stud 15 is passed through the first position hole 13 and screwed into the locking screw hole 17 of the lifting slider 11 to fix the height of the main lightning rod 2. This allows the height of the main lightning rod 2 to be quickly switched to a high-low structure with the auxiliary lightning rod 3 according to the actual lightning environment, so that they can cooperate with each other to eliminate the "flashover blind zone" of a single rod, form a better lightning protection range, effectively intercept lightning, and disperse lightning energy to reduce the damage of lightning strikes to the excitation transformer.

[0026] Throughout the lightning protection process, the main lightning rod 2 and the auxiliary lightning rod 3 together form a lightning protection line. Once struck by lightning, the lightning will be attracted by the lightning rods and then the powerful lightning current will be introduced into the ground through the grounding wire 19 fixed at the lower end, thereby preventing the excitation transformer body 1 from being damaged by lightning and ensuring the stable operation of the power system.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Although embodiments of this utility model have been shown and described, this does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model. Regarding the embodiments of this utility model, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lightning protection mechanism for an excitation transformer, characterized in that, include: Excitation transformer body (1); The lightning protection mechanism is slidably connected to the four sides of the excitation transformer body (1). The lightning protection mechanism includes a main lightning rod (2) and three auxiliary lightning rods (3). The main lightning rod (2) is located on one side of the excitation transformer body (1), and the three auxiliary lightning rods (3) are located on the other three sides of the excitation transformer body (1). Lifting mechanism (4), which is slidably connected to the outside of the excitation transformer body (1), is used for centralized lifting of lightning protection mechanism; The height adjustment mechanism (5) is installed and fixed inside the lifting mechanism (4). The height adjustment mechanism (5) is used to adjust the height of the main lightning rod (2).

2. The excitation transformer lightning protection mechanism according to claim 1, characterized in that: The lifting mechanism (4) includes a lifting bracket (6), which is slidably connected to the outside of the excitation transformer body (1). The upper end face of the lifting bracket (6) is fixed with a positioning stud (8), and the four sides of the excitation transformer body (1) are all fixed with telescopic slides (7).

3. The excitation transformer lightning protection mechanism according to claim 2, characterized in that: The positioning stud (8) is slidably connected in the sliding hole of the telescopic slide (7), and the upper end of the positioning stud (8) is threaded with an anti-fall knob (9).

4. The excitation transformer lightning protection mechanism according to claim 1, characterized in that: The height adjustment mechanism (5) includes a height adjustment slide (10), which is fixed inside the lifting bracket (6). A lifting slider (11) is slidably connected inside the height adjustment slide (10), and the lower end of the main lightning rod (2) is fixed to the top of the lifting slider (11).

5. The excitation transformer lightning protection mechanism according to claim 4, characterized in that: The inner wall of the height adjustment slide (10) is provided with a guide groove (12) that slides and matches the lifting slider (11), and the main lightning rod (2) is slidably connected inside the height adjustment slide (10).

6. The excitation transformer lightning protection mechanism according to claim 5, characterized in that: A wire hole (18) is provided at the center of the upper end face of the lifting slider (11), and a through hole (16) is provided on the inner bottom wall of the height adjustment slide (10). The wire hole (18) and the through hole (16) are aligned.

7. The excitation transformer lightning protection mechanism according to claim 5, characterized in that: The lifting slider (11) has a locking screw hole (17) on one side surface, and a locking stud (15) is threaded into the locking screw hole (17). The height adjustment slide (10) has a first gear hole (13) and a second gear hole (14) on one side surface. The first gear hole (13) is located above the second gear hole (14). Both the first gear hole (13) and the second gear hole (14) are connected to the guide groove (12).

8. The excitation transformer lightning protection mechanism according to claim 5, characterized in that: The lower ends of both the main lightning rod (2) and the auxiliary lightning rod (3) are fixed with grounding wires (19).

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