Stacked iron core for voltage transformer of power transmission line

Abstract

The laminated iron core for the power transmission line voltage transformer comprises a top plate, a bottom plate and a silicon steel sheet, positioning holes are formed in the four corners of the top end of the silicon steel sheet, positioning blocks are fixedly welded to the four corners of the bottom of the silicon steel sheet, inserting holes are formed in the four corners of the top end of the bottom plate, and inserting blocks are fixedly welded to the four corners of the bottom of the top plate. The diameter of the insertion block is consistent with that of the positioning hole, and the diameter of the positioning block is consistent with that of the insertion hole; according to the utility model, the positioning holes and the positioning blocks are arranged on the upper and lower surfaces of the silicon steel sheets, so that the silicon steel sheets are clamped and locked, and the fixing mechanism does not pass through the surfaces of the silicon steel sheets, so that other silicon steel sheets are not scattered and deviated and are difficult to align again when the damaged silicon steel sheets are disassembled and maintained, and the disassembly and assembly difficulty is reduced; and the stability and the convenience are improved.

Description

A stacked iron core for a voltage transformer in a transmission line Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to a stacked iron core for a voltage transformer in a transmission line. Background Technology

[0002] Voltage transformers are indispensable and important equipment in power systems. Their core function is to convert high voltage to low voltage proportionally, providing safe and reliable voltage signals for measuring instruments, relay protection devices, and automatic control systems. The iron core is one of the important components of the transformer. As part of the closed magnetic flux path, it plays a crucial role in the performance and efficiency of the voltage transformer.

[0003] The iron core is made of multiple silicon steel sheets of different widths stacked, impregnated, and dried. However, the stacking process of existing voltage transformer iron cores is extremely cumbersome, time-consuming, and labor-intensive. Furthermore, when a single silicon steel sheet is damaged and needs to be replaced, the other silicon steel sheets are easily scattered, making realignment troublesome and affecting the stability and convenience of product use. Therefore, a new technical solution is proposed to address this issue. Summary of the Invention

[0004] The purpose of this utility model is to provide a stacked iron core for voltage transformers in transmission lines, which solves the problems mentioned in the background art. The stacking process of existing voltage transformer iron cores is time-consuming and labor-intensive, and when a single silicon steel sheet is damaged and needs to be replaced, it is easy for other silicon steel sheets to fall apart, making realignment troublesome and affecting the stability and convenience of product use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stacked iron core for a voltage transformer in a transmission line, comprising a top plate, a bottom plate, and silicon steel sheets. Positioning holes are provided at the four corners of the top of the silicon steel sheets, and positioning blocks are fixedly welded to the four corners of the bottom of the silicon steel sheets. Insertion holes are provided at the four corners of the top of the bottom plate, and insertion blocks are fixedly welded to the four corners of the bottom of the top plate. The diameter of the insertion blocks is consistent with the diameter of the positioning holes, and the diameter of the positioning blocks is consistent with the diameter of the insertion holes.

[0006] In this technical solution, positioning holes and positioning blocks are set on the upper and lower surfaces of the silicon steel sheets to achieve interlocking and locking between the silicon steel sheets. The fixing mechanism does not pass through the surface of the silicon steel sheets, so when disassembling and repairing damaged silicon steel sheets, other silicon steel sheets will not be scattered and shifted, making it difficult to realign them. This reduces the difficulty of disassembly and assembly and improves stability and convenience.

[0007] Preferably, the bottom plate and the top plate are provided with fixing frames on both the left and right sides, and the upper and lower inner walls of the fixing frames are fixedly connected with limit blocks. Fixing holes are provided at the edges of the left and right sides of the bottom plate and the top plate.

[0008] Preferably, a rod is inserted between the upper and lower surfaces of the fixing frame and is slidably connected to the rod. The rod passes through fixing holes in the bottom plate and the top plate and fits against the inner wall of the fixing hole.

[0009] Preferably, both the upper and lower surfaces of the insertion rod are threaded, and both the upper and lower surfaces of the insertion rod are threaded with nuts.

[0010] Preferably, a push plate is fixedly connected to the bottom end of the fixing frame, and the push plate is in contact with the bottom surface of the base plate and detachably connected to the base plate by bolts.

[0011] Preferably, the bottom of the base plate is provided with expansion grooves on both sides, the expansion grooves penetrate the upper and lower surfaces of the base plate, and expansion blocks are slidably connected to the inner side of the expansion grooves.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model achieves interlocking and locking between silicon steel sheets by setting positioning holes and positioning blocks on the upper and lower surfaces of the silicon steel sheets. The fixing mechanism does not pass through the surface of the silicon steel sheets, so when disassembling and repairing damaged silicon steel sheets, it will not cause other silicon steel sheets to spread out and shift, making it difficult to realign. This reduces the difficulty of disassembly and assembly and improves stability and convenience.

[0014] 2. This utility model fixes the bottom plate and top plate by setting fixed frames on the left and right sides, and at the same time, the push plate pushes the telescopic block in the telescopic groove to extend, thereby limiting the bottom silicon steel sheet on the inside and preventing it from shifting laterally between the top plate and the bottom plate. Since the silicon steel sheets of each layer are locked to each other, the overall stability is improved. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 is an overall view of this utility model;

[0017] Figure 2 is a front view of the structure of this utility model.

[0018] In the diagram: 1. Base plate; 101. Insertion hole; 2. Top plate; 201. Fixing hole; 202. Insertion block; 3. Silicon steel sheet; 301. Positioning hole; 302. Positioning block; 4. Fixing frame; 401. Insertion rod; 402. Nut; 403. Limiting block; 5. Push plate; 501. Expansion groove; 502. Expansion block. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description will further elaborate on them in conjunction with specific embodiments.

[0020] A stacked iron core for a voltage transformer in a transmission line, as shown in Figures 1 and 2, includes a top plate 2, a bottom plate 1, and silicon steel sheets 3. Positioning holes 301 are provided at the four corners of the top of the silicon steel sheets 3, and positioning blocks 302 are fixedly welded to the four corners of the bottom of the silicon steel sheets 3. Insertion holes 101 are provided at the four corners of the top of the bottom of the bottom plate 1, and insertion blocks 202 are fixedly welded to the four corners of the bottom of the top plate 2. The diameter of the insertion blocks 202 is the same as the diameter of the positioning holes 301, and the diameter of the positioning blocks 302 is the same as the diameter of the insertion holes 101. During installation, since the positioning blocks 302 at the bottom of the silicon steel sheets 3 are the same size as the insertion holes 101 on the surface of the bottom plate 1, the silicon steel sheets 3 are directly aligned and inserted into the insertion holes 101. Then, the multi-layered silicon steel sheets are... The silicon steel sheets 3 are stacked on top of each other. The positioning block 302 of the upper silicon steel sheet 3 can be inserted into the positioning hole 301 of the lower silicon steel sheet 3 to achieve mutual locking. Compared with the method of using screws or pins to fix all silicon steel sheets 3 through, this solution will not cause other silicon steel sheets 3 to spread out and shift when disassembling and repairing damaged silicon steel sheets 3, making it difficult to realign. This reduces the difficulty of disassembly and assembly and improves convenience. Fixing holes 201 are opened at the left and right side edges of the bottom plate 1 and the top plate 2. The insertion rod 401 passes through the fixing holes 201 of the bottom plate 1 and the top plate 2 and fits against the inner wall of the fixing holes 201. Therefore, after the insertion rod 401 is inserted, the top plate 2 and the bottom plate 1 can avoid lateral shaking, which improves the overall stability.

[0021] Specifically, as shown in Figure 2, telescopic grooves 501 are provided on both sides of the bottom of the base plate 1. The telescopic grooves 501 penetrate the upper and lower surfaces of the base plate 1, and telescopic blocks 502 are slidably connected to the inner side of the telescopic grooves 501. A push plate 5 is fixedly connected to the bottom end of the fixing frame 4. The push plate 5 contacts the bottom surface of the base plate 1 and is detachably connected to the base plate 1 by bolts. While the fixing frame 4 is inserted to fix the top plate 2 and the base plate 1, the telescopic block 502 is squeezed by the push plate 5 and moves upward. Its top extends out of the surface of the base plate 1 and contacts the inner surface of the silicon steel sheet 3, thereby further limiting the silicon steel sheet 3 from the inside and preventing it from shifting laterally between the top plate 2 and the base plate 1. Since the silicon steel sheets 3 are locked to each other, the overall stability is improved.

[0022] Furthermore, as shown in Figure 1, both the bottom plate 1 and the top plate 2 are provided with fixing brackets 4 on the left and right sides. A rod 401 passes through the upper and lower surfaces of the fixing bracket 4 and is slidably connected to the rod 401. The upper and lower surfaces of the rod 401 are threaded, and nuts 402 are threadedly connected to the upper and lower surfaces of the rod 401. After the silicon steel sheet 3 is assembled, the insertion hole 101 at the bottom of the top plate 2 is inserted into the positioning hole 301 of the uppermost silicon steel sheet 3. At this time, the fixing brackets 4 are inserted on both sides, and the fixing brackets 4 connect the top plate 2 and the bottom plate 1 together. Then the rod 401 is inserted, and the nuts 402 are tightened at both ends of the rod 401. The rod 401 passes through the fixing hole 201, tightly binding the top plate 2 and the bottom plate 1 together, thereby ensuring the stability of the inner silicon steel sheet 3 and preventing displacement and shaking.

[0023] It is worth noting that, as shown in Figure 1, the upper and lower inner walls of the fixing frame 4 are fixedly connected with limit blocks 403. When the fixing frame 4 is inserted, the limit blocks 403 play a self-blocking and positioning role. When it contacts the bottom plate 1 and the top plate 2, it reaches the position of the fixing hole 201. Only slight adjustments are needed in the front and back, and no adjustments are needed in the left and right, which improves the convenience of installation.

[0024] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

Claims

1. A stacked iron core for a voltage transformer in a transmission line, comprising a top plate (2), a bottom plate (1), and silicon steel sheets (3), characterized in that: The silicon steel sheet (3) has positioning holes (301) at the top four corners, and positioning blocks (302) are fixedly welded to the bottom four corners. The bottom plate (1) has insertion holes (101) at the top four corners, and insertion blocks (202) are fixedly welded to the bottom four corners. The diameter of the insertion block (202) is the same as the diameter of the positioning hole (301), and the diameter of the positioning block (302) is the same as the diameter of the insertion hole (101).

2. A laminated core for a power transmission line voltage transformer according to claim 1, characterized in that: The bottom plate (1) and the top plate (2) are provided with fixing frames (4) on both the left and right sides. The upper and lower inner walls of the fixing frames (4) are fixedly connected with limit blocks (403). Fixing holes (201) are provided at the edges of the left and right surfaces of the bottom plate (1) and the top plate (2).

3. The stacked iron core for a voltage transformer in a transmission line according to claim 2, characterized in that: A rod (401) is inserted between the upper and lower surfaces of the fixing frame (4) and is slidably connected to the rod (401). The rod (401) passes through the fixing holes (201) of the bottom plate (1) and the top plate (2) and fits against the inner wall of the fixing holes (201).

4. A laminated core for a power transmission line voltage transformer according to claim 3, characterized in that: The upper and lower ends of the insertion rod (401) are threaded, and the upper and lower ends of the insertion rod (401) are threaded with nuts (402).

5. A stacked iron core for a voltage transformer in a transmission line according to claim 2, characterized in that: The bottom end of the fixed frame (4) is fixedly connected to a push plate (5), which contacts the bottom surface of the base plate (1) and is detachably connected to the base plate (1) by bolts.

6. A laminated core for a power transmission line voltage transformer according to claim 1, characterized by: The bottom of the base plate (1) is provided with telescopic grooves (501) on both sides. The telescopic grooves (501) penetrate the upper and lower surfaces of the base plate (1), and the inner side of the telescopic grooves (501) is slidably connected with telescopic blocks (502).

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