Special-shaped crimping joint for lead connection of large transformer
By designing a special-shaped crimp joint with angle, the problem of insufficient electrical safety distance caused by the narrow space of lead connection in large transformers is solved, and the satisfaction of safety distance and full utilization of operating space are achieved, avoiding safety hazards.
Patent Information
- Application Number
- CN202323564707.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-26
AI Technical Summary
In large transformers, due to the small space and the leads are not easy to bend, resulting in insufficient electrical safety distance and poses safety hazards.
A special-shaped crimp joint for connecting large transformer leads is designed, including an angled wire tube and a copper bar. The copper bar is arranged at an angle with the wire tube, and the copper bar is equipped with mounting holes to tighten with the lead copper bar. A breathable hole is also provided on the wiring barrel to make full use of the internal space of the transformer.
The device realizes the natural extension of the leads in a narrow space, meets the electrical safety distance, avoids safety hazards, and is easy to process, simple structure and reliable performance.
Smart Images
Figure CN222168116U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of transformer manufacturing, and in particular relates to a special-shaped crimping joint used for connecting lead wires of large transformers. Background Art
[0002] The leads inside the transformer carry high voltage and high current. When the lead voltage is high, to prevent voltage breakdown and creepage problems, there should be an electrical safety distance between the leads and between the leads and the tank wall and other ground potentials; or when the lead current is high, to prevent overheating caused by electromagnetic induction of large current conductors, there should also be an electrical safety distance between the leads and the tank wall and other ground potentials. Certain specific parts inside the transformer have small space, tight lead arrangement, and the leads are not easy to bend, resulting in insufficient electrical safety distance for the leads, which leaves hidden dangers for the safe operation of the transformer.
[0003] Therefore, there is an urgent need for a special-shaped crimping joint for connecting the leads of large transformers. Utility Model Content
[0004] The utility model aims to provide a special-shaped crimping joint for connecting lead wires of large transformers to solve the above problems.
[0005] To achieve the above purpose, the utility model provides the following solutions:
[0006] A special-shaped crimping joint for connecting the lead wires of a large transformer comprises: a wiring barrel for connecting to the original wire of a large-gauge winding, one end of the wiring barrel being fixedly connected to a copper bar for fixing to the lead copper bar, and the wiring barrel and the copper bar being arranged at an angle.
[0007] Preferably, the copper busbar is provided with a plurality of mounting holes, and bolts pass through the mounting holes to fasten the copper busbar and the lead copper busbar.
[0008] Preferably, the wiring barrel is provided with a ventilation hole at the root of the bent end close to the copper busbar.
[0009] Preferably, the angle between the copper busbar and the wiring barrel is 90° to 150°.
[0010] Preferably, the length of the copper busbar is 80-160 mm.
[0011] Preferably, the wall thickness of the wiring barrel is 4-8 mm.
[0012] Preferably, the diameter of the air holes is 3-5 mm.
[0013] Compared with the prior art, the utility model has the following advantages and technical effects:
[0014] When in use, the large-gauge winding original wire is crimped and fixed to the terminal barrel, and the copper bar is fixed to the lead copper bar. The terminal barrel and the copper bar are set at an angle. When the large-gauge winding original wire has a large gauge and the operating space is small, the traditional direct pressure joint causes tight operating space, and the large-gauge winding original wire is not easy to bend. After the device connects the large-gauge winding original wire to the terminal barrel, the large-gauge winding original wire naturally extends along the length direction of the terminal barrel without intentional bending. The insulation layer of the large-gauge winding original wire and the body pressure plate are spaced large, making full use of the narrow space in the transformer and meeting the electrical safety distance to avoid leaving safety hazards. The device is easy to process, simple in structure, reliable in performance, and can make full use of the internal space of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor:
[0016] Figure 1 This is the front view of the structure of the utility model;
[0017] Figure 2 This is a top view of the structure of the utility model;
[0018] Figure 3 This is a schematic diagram of the application of the utility model;
[0019] Among them, 1. Copper busbar; 2. Wiring barrel; 3. Air vent; 4. Mounting hole; 5. Lead copper busbar; 6. Large-gauge winding original wire; 7. Device body pressure plate. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0022] Reference Figures 1 to 3The utility model discloses a special-shaped crimping joint for connecting the lead wires of a large transformer, comprising: a wiring barrel 2 for connecting with a large-gauge winding original wire 6, one end of the wiring barrel 2 is fixedly connected with a copper bar 1, the copper bar 1 is used to be fixedly connected with the lead copper bar 5, and the wiring barrel 2 and the copper bar 1 are arranged at an angle.
[0023] When in use, the large-gauge winding original wire 6 is crimped and fixed to the terminal barrel 2, the copper bus 1 is fixed to the lead copper bus 5, and the terminal barrel 2 and the copper bus 1 are set at an angle. When the large-gauge winding original wire 6 has a large gauge and the operating space is small, the traditional direct-pressure joint causes the operating space to be tight, and the large-gauge winding original wire 6 is not easy to bend. After the device connects the large-gauge winding original wire 6 to the terminal barrel 2, the large-gauge winding original wire 6 naturally extends along the length direction of the terminal barrel 2 without deliberate bending. The insulation layer of the large-gauge winding original wire 6 and the device body pressure plate 7 are spaced large, which fully utilizes the narrow space in the transformer and meets the electrical safety distance to avoid leaving safety hazards.
[0024] The device is easy to process, has a simple structure, reliable performance, and can fully utilize the internal space of the transformer.
[0025] According to a further optimized solution, a plurality of mounting holes 4 are provided on the copper busbar 1 , and bolts are passed through the mounting holes 4 to fasten the copper busbar 1 and the lead copper busbar 5 .
[0026] According to a further optimized solution, a ventilation hole 3 is provided at the root of the bent end of the wiring barrel 2 close to the copper bus 1.
[0027] According to a further optimized solution, the angle between the copper busbar 1 and the terminal barrel 2 is 90° to 150°.
[0028] According to a further optimized solution, the length of the copper busbar 1 is 80-160 mm.
[0029] According to a further optimization scheme, the wall thickness of the wiring barrel 2 is 4-8 mm.
[0030] According to a further optimized solution, the diameter of the air hole 3 is 3-5 mm.
[0031] refer to Figure 1 to Figure 2 , where “a” represents the outer diameter of the terminal barrel 2, “b” represents the inner diameter of the terminal barrel 2, “c” represents the angle between the copper busbar 1 and the terminal barrel 2, and “d” represents the length of the copper busbar 1.
[0032] The device is made of a copper tube, one end of which is a wiring barrel 2 for connecting a large-gauge winding original wire 6 or a cable side, and the other end is a copper bar 1. The copper bar 1 can be obtained by directly flattening the copper tube, and a plurality of mounting holes 4 for mounting with a lead copper bar 5 are provided on the copper bar 1. In this embodiment, two mounting holes 4 are preferably provided.
[0033] The difference between it and ordinary crimping joints is that it adopts an angled special-shaped structure, and there is a certain bending angle between the copper bar 1 and the terminal barrel 2. The bending angle makes it easier for the terminal barrel 2 to adapt to the narrow operating space inside the transformer after being crimped and fixed with the large-gauge winding original wire 6 or cable, solving the problem of bending difficulty in the narrow operating space and the problem of electrical safety distance when connecting the lead wire, and preventing the damage to the insulation layer. This ensures that the internal lead wiring process of the transformer has sufficient operating space and electrical safety distance, eliminating the potential safety hazards of the transformer.
[0034] In order to be applied in different parts of the transformer, the angle between the copper busbar 1 and the terminal barrel 2 ranges from 90° to 150°. In order to improve the degree of product standardization, the preferred angle in this embodiment is 120°.
[0035] "b" represents the inner diameter of the wire barrel 2, which is 20-40 mm, and the wall thickness of the wire barrel 2 is 4-8 mm, from which the outer diameter of the wire barrel 2 can be obtained.
[0036] refer to Figure 3 , Figure 3 This is a schematic diagram of the application effect of the device. In the figure, the copper busbar 1 is fixedly connected to the lead copper busbar 5, and the large-gauge winding original wire 6 is fixedly connected to the terminal barrel 2.
[0037] The distance of the operating space between the device body pressure plate 7 and the wire clamp holding the lead row is represented as "L". In general, the distance shown by L is only 100mm. When the wire gauge of the large-gauge winding original wire 6 is large, the use of conventional direct pressure joints leads to tight operating space, the wire is not easy to bend, and the distance between the wire insulation layer and the device body pressure plate 7 is small, which is prone to safety hazards. The copper bus 1 and the terminal barrel 2 of the device are pre-bent at an angle, so that the large-gauge winding original wire 6 and the terminal barrel 2 are easily connected, and the large-gauge winding original wire 6 is naturally extended along the length direction of the terminal barrel 2. The distance between the insulation layer of the large-gauge winding original wire 6 and the device body pressure plate 7 is large, avoiding safety hazards.
[0038] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0039] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.
Claims
1. A special-shaped crimping joint for connecting the leads of large transformers, characterized in that: include: A wiring barrel (2) for connecting to a large-gauge winding primary wire (6), one end of the wiring barrel (2) being fixedly connected to a copper bar (1), the copper bar (1) being used for being fixedly connected to a lead copper bar (5), the wiring barrel (2) and the copper bar (1) being arranged at an angle.
2. The special-shaped crimping joint for connecting leads of large transformers according to claim 1, characterized in that: The copper busbar (1) is provided with a plurality of mounting holes (4), and bolts are passed through the mounting holes (4) to fasten the copper busbar (1) and the lead copper busbar (5).
3. The special-shaped crimping joint for connecting leads of large transformers according to claim 1, characterized in that: The wiring barrel (2) is provided with an air hole (3) at the root of the bent end close to the copper busbar (1).
4. The special-shaped crimping joint for connecting leads of large transformers according to claim 1, characterized in that: The included angle between the copper busbar (1) and the wiring barrel (2) is 90° to 150°.
5. The special-shaped crimping joint for connecting leads of large transformers according to claim 1, characterized in that: The length of the copper busbar (1) is 80-160 mm.
6. The special-shaped crimping joint for connecting leads of large transformers according to claim 1, characterized in that: The wall thickness of the wiring barrel (2) is 4-8 mm.
7. The special-shaped crimping joint for connecting leads of large transformers according to claim 3, characterized in that: The diameter of the air vent (3) is 3-5 mm.