A welding method for radial combined conductors and axial combined conductors

Abstract

This invention relates to a welding method for radial and axial composite conductors. The thickness A' of the axial composite conductor is adjusted so that A = A'; the length of the radial composite conductor is adjusted so that conductor N is 15-20 mm longer than conductor N-1; conductor 1 of the radial composite conductor is welded to conductor 1' of the axial composite conductor, and conductor N is welded to N'; the width of the radial composite conductor is adjusted during welding so that B = B'. The method for adjusting the width of the radial composite conductor is as follows: conductor 1 is cut along the lower side of the width, conductor 2 is cut along both sides of the width, conductor 3 is cut along the upper side of the width, and so on in a cyclical manner; the radial and axial composite conductors are welded securely using a welding machine, and the conductors are then insulated. This invention enables reliable wire switching welding of radial N-composite conductors and axial N-composite conductors, avoiding short circuits.

Description

Technical Field

[0001] This invention belongs to the field of transformer coil manufacturing technology, specifically relating to a welding method for radial composite conductors and axial composite conductors. Background Technology

[0002] To meet the ever-increasing capacity demands of the power grid, large oil-immersed power transformers and reactors exhibit diverse coil configurations, along with significant variations in conductor gauge selection. When replacing radial N-combination lines (i.e., a combination line consisting of N conductors) with axial N-combination lines within the same coil, the handling and welding methods for the conductors greatly influence the welding quality. Improper handling can easily lead to short circuits at the weld points between different conductors, causing product quality issues. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a method for welding radial N-combination lines and axial N-combination lines, which ensures reliable welding and avoids short-circuit points. The technical solution adopted by this invention is as follows:

[0004] A method for welding radial composite conductors and axial composite conductors, wherein the radial composite conductors and axial composite conductors are each composed of N conductors, the N conductors constituting the radial composite conductors being conductor 1, conductor 2, ..., conductor N, and the N conductors constituting the axial composite conductors being conductor 1', conductor 2', ..., conductor N'; the radial composite conductors have a thickness of A and a width of B, and are combined in the thickness direction; the axial composite conductors have a thickness of A' and a width of B', and are combined in the width direction; the thickness A of the radial composite conductors is less than the thickness A' of the axial composite conductors, and the width B of the radial composite conductors is greater than the width B' of the axial composite conductors;

[0005] The thickness A' of the axial composite conductor is processed so that A = A'; the length of the radial composite conductor is processed so that conductor 2 is 15-20 mm longer than conductor 1, conductor 3 is 15-20 mm longer than conductor 2, ..., conductor N is 15-20 mm longer than conductor N-1.

[0006] Weld conductor 1 of the radial composite conductor to conductor 1' of the axial composite conductor, conductor 2 to conductor 2', conductor 3 to conductor 3', ..., conductor N to conductor N'. When welding the two conductors, the width of the radial composite conductor is adjusted so that B = B'. The method for adjusting the width of the radial composite conductor is as follows: conductor 1 is cut along the lower side of the width, conductor 2 is cut along both sides of the width, conductor 3 is cut along the upper side of the width, and so on, so that adjacent welding points are misaligned.

[0007] Use a welding machine to firmly weld the radial composite conductors to the axial composite conductors, and then insulate and wrap the welded conductors.

[0008] Preferably, the thickness A' of the axially combined conductor is processed using hydraulic equipment.

[0009] Preferably, the length of the radial composite conductor is processed using a wire-cutting device.

[0010] Preferably, the width of the radial composite conductor is cut using a wire-cutting device.

[0011] The beneficial effects of this invention are as follows:

[0012] The method of this invention can realize reliable wire switching and welding of radial N-combination lines and axial N-combination lines, avoid the generation of short circuit points, and ensure that the radial dimensions meet the drawing requirements after insulation wrapping, which has broad application prospects.

[0013] This method can meet the requirements for wire welding, ensuring that the thickness and width of each wire in the radial and axial composite wires are the same when welded; this method can effectively avoid bending at the welding points between different wires; this method can effectively avoid insulation wear after insulation wrapping at the welding points between different wires; this method can effectively avoid radial deviation after wire insulation wrapping; this method can effectively avoid coil short circuits. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some specific embodiments of the present invention. For those skilled in the art, other drawings falling within the scope of protection of this application can be obtained based on these drawings without any creative effort.

[0015] Figure 1-1 , 1-2 This is a schematic diagram of the radial combined conductor and the axial combined conductor according to an embodiment of the present invention;

[0016] Figure 2-1 , 2-2 This is a schematic diagram of the welding of wire 1 and wire 1' according to an embodiment of the present invention;

[0017] Figure 3-1 , 3-2 This is a schematic diagram of the welding of wire 2 and wire 2' according to an embodiment of the present invention;

[0018] Figure 4-1 , 4-2 This is a schematic diagram of the welding of wire 3 and wire 3' according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the radial composite conductor and the axial composite conductor after welding according to an embodiment of the present invention. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In this embodiment of the invention, taking N=3, i.e., 3-combination lines, as an example, the technical solution of the present invention will be further described. The specific welding implementation method is as follows:

[0022] 1. According to the drawings, read the conductor gauge (thickness, width) and weld the radial composite conductor and the axial composite conductor. Figure 1-1 This is a schematic diagram of the radial composite conductor structure. Figure 1-2 This is a schematic diagram of the axial composite conductor structure. The radial composite conductor thickness A is less than the axial composite conductor thickness A', and the radial composite conductor width B is greater than the axial composite conductor width B'.

[0023] 2. Process the thickness A' of the axial composite conductor: Use hydraulic equipment to process the thickness A' of conductors 1', 2', and 3' respectively, so that A' = A.

[0024] 3. Process the length of the radial composite conductors: Use a wire cutting device to process the lengths of conductors 1, 2, and 3 respectively, so that conductor 2 is 15-20mm longer than conductor 1 and conductor 3 is 15-20mm longer than conductor 2.

[0025] 4. Solder wire 1 to wire 1', as follows: Figure 2-1 , 2-2 The diagram shown is a schematic of welding wire 1 and wire 1' according to an embodiment of the present invention. Using a wire cutting device, wire 1 is processed in the radial width direction of the combined wires to make the widths of wire 1 and wire 1' consistent. Wire 1 and wire 1' are then securely welded together using a welding machine. Note: Wire 1 is cut along the lower side of its width.

[0026] 5. Weld wire 2 to wire 2', as follows: Figure 3-1 , 3-2 The diagram shown is a schematic of welding wire 2 and wire 2' according to an embodiment of the present invention. Using a wire cutting device, wire 2 is processed in the radial width direction of the combined wires to make the widths of wire 2 and wire 2' consistent. Wire 2 and wire 2' are then securely welded together using a welding machine. Note: The wire 2 is cut along both sides of its width.

[0027] 6. Weld wire 3 to wire 3', as follows: Figure 4-1 , 4-2The diagram shown is a schematic of welding wire 3 and wire 3' according to an embodiment of the present invention. Using a wire cutting device, wire 3 is processed in the radial width direction of the combined wires to make the widths of wire 3 and wire 3' consistent. Wire 3 and wire 3' are then securely welded together using a welding machine. Note: The wire 3 is cut along the upper side of its width.

[0028] 7. Schematic diagram of the overall welding of radial composite conductors and axial composite conductors, as shown below. Figure 5 As shown. Finally, insulate and wrap the welded wires.

[0029] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention.

Claims

1. A method for welding radial composite conductors and axial composite conductors, wherein the radial composite conductors and axial composite conductors are each composed of N conductors, the N conductors constituting the radial composite conductors being conductor 1, conductor 2, ..., conductor N, and the N conductors constituting the axial composite conductors being conductor 1', conductor 2', ..., conductor N'; the radial composite conductors have a thickness of A and a width of B, and are combined in the thickness direction; the axial composite conductors have a thickness of A' and a width of B', and are combined in the width direction; the thickness A of the radial composite conductors is less than the thickness A' of the axial composite conductors, and the width B of the radial composite conductors is greater than the width B' of the axial composite conductors; characterized in that: The thickness A' of the axial composite conductor is processed so that A' = A; the length of the radial composite conductor is processed so that conductor 2 is 15-20 mm longer than conductor 1, conductor 3 is 15-20 mm longer than conductor 2, ..., conductor N is 15-20 mm longer than conductor N-1. Weld conductor 1 of the radial composite conductor to conductor 1' of the axial composite conductor, conductor 2 to conductor 2', conductor 3 to conductor 3', ..., conductor N to conductor N'. When welding the two conductors, the width of the radial composite conductor is adjusted so that B = B'. The method for adjusting the width of the radial composite conductor is as follows: conductor 1 is cut along the lower side of the width, conductor 2 is cut along both sides of the width, conductor 3 is cut along the upper side of the width, and so on, so that adjacent welding points are misaligned. Use a welding machine to firmly weld the radial composite conductors to the axial composite conductors, and then insulate and wrap the welded conductors.

2. The welding method for radial composite conductors and axial composite conductors according to claim 1, characterized in that: The thickness A' of the axial composite conductor is processed using hydraulic equipment.

3. The welding method for radial composite conductors and axial composite conductors according to claim 1, characterized in that: The length of the radial composite conductor is processed using a wire-cutting device.

4. The welding method for radial composite conductors and axial composite conductors according to claim 1, characterized in that: The width of the radial composite conductor is cut using a wire-cutting device.

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