High voltage lead structure of a load regulation transformer

Abstract

The utility model discloses a high -tension lead structure of on -load voltage regulating transformer, including high -tension lead, the high -tension lead has four and transverse distribution, and the upper and lower both ends of high -tension lead are equipped with the line nose, still include guiding mechanism, guiding mechanism: it includes guide pipe, connecting groove, connecting ring and horizontal board, the outer arc surface of guide pipe respectively movablely sets up in the high -tension lead, and the outer arc surface of guide pipe is equipped with connecting groove respectively, and the back of high -tension lead is located respectively in horizontal board, and the front surface of horizontal board is rotatably connected with adjustable tightness's connecting ring through pivot no.

Description

Technical Field

[0001] This utility model relates to the field of on-load tap-changing transformer technology, specifically to a high-voltage lead structure for an on-load tap-changing transformer. Background Technology

[0002] An on-load tap-changing transformer is a power device that can stabilize the output voltage by adjusting the turns ratio of the high-voltage winding under load. Its core component is the internal on-load tap changer, which can quickly switch taps without interrupting power, achieving real-time voltage adjustment. However, like traditional transformers, on-load tap-changing transformers also require a high-voltage lead structure for circuit connection. In existing technology, authorized publication number CN222672777... U proposed a transformer high-voltage lead structure, including a lead box. The lead box has two through-holes on both its upper and lower ends, each containing a lead tube with an inlet. Screws are rotatably mounted on the upper and lower inner walls of the lead box. Each pair of lead tubes is connected to a screw via a movable mechanism. A drive gear is located inside the lead box and connected to the two screws via a transmission mechanism. A rotating block is rotatably mounted on the outer wall of the lead box and connected to the drive gear via a rotating mechanism. Two C-shaped blocks are also located inside the lead box. While this structure can connect to the transformer's high-voltage lines, ensuring the consistency of the three-phase curvature of the lead during installation relies entirely on the installer's skill, making deviations prone to occur. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high-voltage lead structure for an on-load tap-changing transformer. By cooperating with a horizontal plate and a synchronously rotating connecting ring, the guide tube guides all high-voltage leads to be laid along the same trajectory, which facilitates the installation of the three-phase line curvature of the high-voltage lead structure, ensures the stable operation of the on-load tap-changing transformer and extends its service life, and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage lead structure for an on-load tap-changing transformer, comprising four high-voltage leads distributed laterally, with lugs provided at both the upper and lower ends of the high-voltage leads, and also including a guiding mechanism;

[0005] Guiding mechanism: It includes a guiding tube, a connecting groove, a connecting ring, and a horizontal plate. The guiding tubes are movably sleeved on the outer arc surface of the high-voltage leads. The outer arc surface of the guiding tubes is provided with connecting grooves. The horizontal plates are located on the rear side of the high-voltage leads. The front surface of the horizontal plates is rotatably connected to adjustable connecting rings via a rotating shaft. The connecting rings are installed in conjunction with the connecting grooves. Through the cooperation of the horizontal plates and the synchronously rotating connecting rings, the guiding tubes guide all high-voltage leads to be laid along the same trajectory, which facilitates the installation of the three-phase line arc of the high-voltage lead structure with consistent arc, ensures the stable operation of the on-load tap-changing transformer, and extends its service life.

[0006] Furthermore, the guiding mechanism also includes a turntable and a rotating plate. The turntables are respectively disposed at the rear end of the connecting ring shaft one. The eccentric ends of the rear sides of two horizontally adjacent turntables are rotatably connected to rotating plates through rotating shaft two, so that the connecting rings on the same horizontal plate surface rotate synchronously.

[0007] Furthermore, each of the horizontal plates has a housing at its rear end, with the turntable and rotating plate located inside the housing. The rear side of the housing is provided with a fixing plate to hide the turntable and rotating plate.

[0008] Furthermore, the upper surface of the housing is equipped with a level to facilitate the determination of the levelness of the housing during installation.

[0009] Furthermore, the horizontal plate is provided with limiting baffles at both the upper and lower ends of its rear side. The limiting baffles are installed in conjunction with the rotating plate to limit the movement range of the rotating plate.

[0010] Furthermore, the front end of each connecting ring is open, and bolts are threaded between the two ends of the connecting ring to adjust the tightness of the connecting ring.

[0011] Furthermore, all the guide tubes are insulated rubber tubes, and the horizontal plates are rigid plastic plates, providing insulation protection for the high-voltage leads.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The high-voltage lead structure of this on-load tap-changing transformer has the following advantages:

[0013] By cooperating with the horizontal plate and the synchronously rotating connecting ring, the guide tube guides all high-voltage leads to be laid along the same trajectory, which facilitates the installation of the three-phase line curvature of the high-voltage lead structure, ensures the stable operation of the on-load tap-changing transformer and extends its service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the rear structure of the overall device of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the outer shell of this utility model;

[0017] Figure 4 This is an enlarged structural diagram of point A in this utility model.

[0018] In the diagram: 1 High-voltage lead wire, 2 Wire lug, 3 Guide mechanism, 31 Guide tube, 32 Connecting groove, 33 Connecting ring, 34 Horizontal plate, 35 Turntable, 36 Turning plate, 4 Housing, 5 Fixing plate, 6 Level, 7 Limiting baffle, 8 Bolt. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 This embodiment provides a technical solution: a high-voltage lead structure for an on-load tap-changing transformer, including a high-voltage lead 1, which connects the high-voltage winding output terminal and the high-voltage connection terminal. There are four high-voltage leads 1 distributed laterally. Both the upper and lower ends of the high-voltage lead 1 are provided with wire lugs 2 to facilitate the connection of the high-voltage lead 1 with the high-voltage winding output terminal and the high-voltage connection terminal of the on-load tap-changing transformer. It also includes a guiding mechanism 3.

[0021] Guiding mechanism 3 includes a guiding tube 31, a connecting groove 32, a connecting ring 33, and a horizontal plate 34. The guiding tubes 31 are movably sleeved on the outer arc surface of the high-voltage lead 1. The outer arc surface of the guiding tubes 31 is provided with connecting grooves 32. The horizontal plates 34 are located on the rear side of the high-voltage lead 1. The front surface of the horizontal plates 34 is rotatably connected to adjustable connecting rings 33 via a rotating shaft. The connecting rings 33 are fitted with the connecting grooves 32. By tightening the connecting rings 33, the connecting rings 33 are engaged with the connecting grooves 32, preventing relative sliding between the connecting rings 33 and the guiding tubes 31. With the connection of the horizontal plates 34, the connecting rings 33 on the same surface of the horizontal plates 34 are distributed at equal intervals in the horizontal direction, which limits the distance between two adjacent guide tubes 31. With the cooperation of multiple vertically distributed horizontal plates 34, the trajectory of all guide tubes 31 is the same, ensuring that the laying trajectory of the high voltage lead 1 is the same and that the three-phase curvature of the high voltage lead structure is consistent. This can effectively reduce the additional mechanical stress and electrical imbalance caused by asymmetrical installation. This can not only reduce vibration and noise, but also avoid local overheating, prevent accelerated insulation aging, and enable the transformer to operate reliably for a long time.

[0022] The guiding mechanism 3 also includes a turntable 35 and a rotating plate 36. The turntable 35 is respectively set at the rear end of the first rotating shaft of the connecting ring 33. The eccentric ends of the rear sides of two horizontally adjacent turntables 35 are rotatably connected to the rotating plate 36 through the second rotating shaft. Through the relative rotation of the rotating plate 36 and the turntable 35, the connecting ring 33 located on the same horizontal plate 34 surface rotates synchronously. When the guiding tube 31 bends, it can still be ensured that all the guiding tubes 31 bend along the same trajectory.

[0023] The rear end of the horizontal plate 34 is provided with a housing 4. The turntable 35 and the rotating plate 36 are located inside the housing 4. The rear side of the housing 4 is provided with a fixing plate 5 to hide the transmission components such as the turntable 35 and the rotating plate 36, so as to avoid the influence of external dust on the transmission components. The housing 4 is fixedly installed on the housing of the load-changing transformer by the fixing plate 5, and the position of the horizontal plate 34 is fixed.

[0024] The upper surface of the outer casing 4 is equipped with a level 6. The level 6 adopts the bubble level commonly used in the prior art, which makes it convenient to determine the levelness of the outer casing 4 during installation.

[0025] Limiting baffles 7 are provided at both the upper and lower ends of the rear side of the horizontal plate 34. The limiting baffles 7 are installed in conjunction with the rotating plate 36. Through the relative rotation of the rotating plate 36 and the turntable 35, the rotating plate 36 is kept horizontal during movement. When the limiting baffles 7 contact the rotating plate 36, they can block the rotating plate 36 from continuing to rotate, limit the bending range of the guide tube 31, and prevent the guide tube 31 from bending excessively.

[0026] The front end of the connecting ring 33 is open. The two ends of the connecting ring 33 are threaded with bolts 8. By rotating the bolts 8, the hexagonal head of the bolts 8 is threaded with the nuts embedded in the ends of the connecting ring 33, so that the ends of the connecting ring 33 are brought closer to each other and the connecting ring 33 is tightened.

[0027] The guide tubes 31 are all insulated rubber tubes, which can be silicone rubber sleeves, and the horizontal plates 34 are all rigid plastic plates, which can be epoxy resin plates, to ensure the insulation effect of the lead wire structure.

[0028] The working principle of the high-voltage lead structure of the on-load tap-changing transformer provided by this utility model is as follows: In use, the high-voltage lead 1 is placed between the high-voltage winding output terminal and the high-voltage terminal of the on-load tap-changing transformer through the wire lug 2, realizing the connection between the high-voltage winding output terminal and the high-voltage terminal. During the laying of the high-voltage lead 1, the outer shell 4 is fixedly installed on the shell of the on-load tap-changing transformer through the fixing plate 5. At this time, the connecting ring 33 is in the open state, and the connecting ring 33 can slide up and down on the outer arc surface of the guide tube 31, so that the connecting ring 33 enters the adjacent connecting groove 32. Then, the bolt 8 is rotated, and the hexagonal head of the bolt 8 is threadedly connected to the nut embedded in the end of the connecting ring 33, so that the ends of the connecting ring 33 are close to each other. The connecting ring 33 is tightened, and the connection between the connecting ring 33 and the connecting groove 32 prevents the relative sliding between the connecting ring 33 and the guide tube 31. Under the connection of the horizontal plate 34, the connecting rings 33 on the same horizontal plate 34 surface are distributed at equal intervals in the lateral direction, which limits the distance between two adjacent guide tubes 31. Then, according to the laying trajectory of the high voltage lead 1, the guide tube 31 is bent, which drives the connecting ring 33 sleeved on its outer arc surface to rotate. Through the relative rotation of the rotating plate 36 and the turntable 35, the connecting rings 33 on the same horizontal plate 34 surface rotate synchronously, ensuring that all the guide tubes 31 have the same bending trajectory, thereby ensuring that the laying trajectory of the high voltage lead 1 is the same and maintaining the consistency of the three-phase curvature of the high voltage lead structure.

[0029] The above are merely embodiments of this utility model and do 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.

Claims

1. A high-voltage lead structure for an on-load tap-changing transformer, comprising four high-voltage leads (1) arranged laterally, wherein each high-voltage lead (1) has a lug (2) at both its upper and lower ends, characterized in that: It also includes guiding institutions (3); The guiding mechanism (3) includes a guiding tube (31), a connecting groove (32), a connecting ring (33), and a horizontal plate (34). The guiding tube (31) is movably sleeved on the outer arc surface of the high voltage lead (1). The outer arc surface of the guiding tube (31) is provided with a connecting groove (32). The horizontal plate (34) is located on the rear side of the high voltage lead (1). The front surface of the horizontal plate (34) is rotatably connected to an adjustable connecting ring (33) via a rotating shaft. The connecting ring (33) is installed in conjunction with the connecting groove (32).

2. The high-voltage lead structure of an on-load tap-changing transformer according to claim 1, characterized in that: The guiding mechanism (3) also includes a turntable (35) and a rotating plate (36). The turntables (35) are respectively located at the rear end of the first rotating shaft of the connecting ring (33). The eccentric ends of the rear sides of two adjacent turntables (35) are rotatably connected to the rotating plate (36) through the second rotating shaft.

3. The high-voltage lead structure of an on-load tap-changing transformer according to claim 2, characterized in that: The rear end of each horizontal plate (34) is provided with a shell (4), the turntable (35) and the rotating plate (36) are respectively located inside the shell (4), and the rear side of the shell (4) is provided with a fixing plate (5).

4. The high-voltage lead structure of an on-load tap-changing transformer according to claim 3, characterized in that: The upper surface of the outer shell (4) is provided with a level (6).

5. The high-voltage lead structure of an on-load tap-changing transformer according to claim 2, characterized in that: The horizontal plate (34) has a limiting baffle (7) at both the upper and lower ends of its rear side. The limiting baffle (7) is installed in conjunction with the rotating plate (36).

6. The high-voltage lead structure of an on-load tap-changing transformer according to claim 1, characterized in that: The front end of each connecting ring (33) is open, and bolts (8) are threaded between the two ends of the connecting ring (33).

7. The high-voltage lead structure of an on-load tap-changing transformer according to claim 1, characterized in that: The guide tubes (31) are all insulated rubber tubes, and the horizontal plates (34) are all rigid plastic plates.

Images