Novel large-capacity large-current multi-busbar flexible connection transformer structure

Abstract

The utility model discloses a novel large-capacity large-current multi-busbar flexible connection transformer structure which comprises a transformer coil, an upper clamping piece and a lower clamping piece. A low-voltage lead of the transformer coil is connected with a connecting bus extending into the transformer shell through the plurality of groups of vertical rows and the plurality of groups of horizontal rows in sequence; one end of each vertical row is fixedly connected with the corresponding low-voltage lead through a bolt, and the other end of each vertical row is fixedly connected with the corresponding horizontal row through a bolt; and each group of horizontal bars is connected with the connecting bus through a flexible bar. The novel large-capacity large-current multi-busbar flexible connection transformer is flexible in structural design thought, and different design schemes are adopted according to local conditions. Three sections of busbars, namely a vertical busbar, a horizontal busbar and a soft busbar, are connected between the low-voltage wire inlet and outlet ends of the transformer and the connecting buses extending into the shell from the low-voltage cabinet. Flexible connection is integrated in a completely rigid connection structure, the mechanical strength of original rigid connection is not affected, and mechanical displacement, mechanical vibration and noise caused by rigid connection are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer structure design, and particularly relates to a novel large-capacity, large-current and multi-busbar soft-connection transformer structure. Background Art

[0002] Power transformers are one of the important equipment in the power grid, and thus their stable and reliable operation will play a very important role in the safety of the power system. The connection between the transformer and the busbar of the power distribution cabinet plays a key role in the stable operation of the entire power system. On the one hand, a reliable connection can ensure the stable transmission of current, reduce losses, and improve the power supply quality. On the other hand, a good connection can prevent equipment failures caused by overheating, vibration or electrodynamic force, thereby increasing the service life of the equipment. In addition, a reasonable connection method also helps to improve the maintenance efficiency and reduce the operating cost.

[0003] As Figure 1 shown, faults often occur due to the hard connection between the low-voltage outgoing busbar 4a of the transformer and the connection copper bar of the power distribution cabinet, which greatly affects the safe and stable operation of the power system.

[0004] Because the transformer is prone to electromagnetic vibration during operation (especially large-capacity and large-current transformers), the vibration will be transmitted to the busbar through the hard connection copper bar, causing the busbar and the equipment connected thereto to generate vibrational resonance and noise, affecting the life of the busbar and the equipment. Summary of the Invention

[0005] The purpose of the utility model is to provide a novel large-capacity, large-current and multi-busbar soft-connection transformer structure, which changes the original pure rigid connection structure of the low-voltage side outgoing busbar of the large-capacity and large-current transformer. By introducing soft busbars and injecting flexible connections into the pure rigid connection structure, it compensates for equipment failures caused by overheating, vibration or electrodynamic force, thereby increasing the service life of the equipment, further enhancing customer satisfaction, and improving the company's market competitiveness.

[0006] To solve the above technical problems, the utility model provides a novel large-capacity, large-current and multi-busbar soft-connection transformer structure, which includes a transformer coil, an upper clamp and a lower clamp;

[0007] The low-voltage leads of the transformer coil are sequentially connected to the connection busbars extending into the transformer housing through multiple groups of vertical busbars and multiple groups of horizontal busbars;

[0008] One end of each group of vertical busbars is fixedly connected to the corresponding low-voltage lead through bolts, and the other end is fixedly connected to the corresponding horizontal busbar through bolts;

[0009] Each row of the horizontal rows is also connected to the connecting busbar by a flexible busbar; one end of each flexible busbar is fixedly connected to the corresponding horizontal row by bolts, and the other end is fixedly connected to the corresponding connecting busbar by bolts.

[0010] Preferably, the connecting busbar includes four phases of N, A, B, and C, and four groups of corresponding vertical rows and horizontal rows are also provided respectively.

[0011] Preferably, when the A, B, and C phases of the connecting busbar are of a four-copper-bar structure, the corresponding horizontal rows and flexible busbars are of a three-copper-bar structure; one end of the copper bar of the flexible busbar is inserted into the copper bar of the horizontal row in an alternating manner, and the other end of the copper bar of the flexible busbar is inserted into the copper bar of the connecting busbar in an alternating manner.

[0012] Preferably, the corresponding vertical row is of a two-copper-bar structure, and the end of the copper bar of the vertical row is inserted into the copper bar of the horizontal row in an alternating manner.

[0013] Preferably, when the A, B, and C phases of the connecting busbar are of a five-copper-bar structure, the corresponding horizontal rows and flexible busbars are of a four-copper-bar structure; one end of the copper bar of the flexible busbar is inserted into the copper bar of the horizontal row in an alternating manner, and the other end of the copper bar of the flexible busbar is inserted into the copper bar of the connecting busbar in an alternating manner.

[0014] Preferably, the corresponding vertical row is of a three-copper-bar structure, and the end of the copper bar of the vertical row is inserted into the copper bar of the horizontal row in an alternating manner.

[0015] Preferably, a bracket is further provided on the upper clamp for supporting multiple groups of horizontal rows extending horizontally.

[0016] Preferably, a busbar clamp is further provided on the horizontal row, and the horizontal row is fixed to the bracket through the busbar clamp.

[0017] Preferably, the busbar clamp includes:

[0018] A single-groove busbar clamp, which includes an upper part of the single-groove clamp and a lower part of the single-groove clamp. A row groove is symmetrically opened in the middle between the upper part of the single-groove clamp and the lower part of the single-groove clamp, and the N phase of the horizontal row is clamped by bolts passing through the upper part of the single-groove clamp and the lower part of the single-groove clamp;

[0019] A three-groove busbar clamp, which includes an upper part of the three-groove clamp and a lower part of the three-groove clamp. Three row grooves are symmetrically opened in the middle between the upper part of the three-groove clamp and the lower part of the three-groove clamp, and any one of the A, B, and C phases of the horizontal row is clamped by bolts passing through the upper part of the three-groove clamp and the lower part of the three-groove clamp;

[0020] A multi-groove busbar clamp, which includes an upper part of the multi-groove clamp and a lower part of the multi-groove clamp. Multiple row grooves are symmetrically opened in the middle between the upper part of the multi-groove clamp and the lower part of the multi-groove clamp, and the N, A, B, and C phases of the horizontal row are clamped simultaneously by bolts passing through the upper part of the multi-groove clamp and the lower part of the multi-groove clamp.

[0021] Preferably, the horizontal rows are arranged vertically, and the vertical rows are arranged in a Z-shape.

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] The novel large-capacity, large-current, multi-busbar flexible connection transformer has a flexible structural design concept and adopts different design schemes according to local conditions. There are three sections of busbar connections from the low-voltage inlet and outlet ends of the transformer to the connection busbar extending from the low-voltage cabinet into the shell, namely the vertical row, the horizontal row, and the flexible row. Incorporating flexible connection into a completely rigid connection structure not only does not affect the mechanical strength of the original rigid connection but also reduces mechanical displacement, mechanical vibration, and noise caused by rigid connection. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of a rigid connection transformer;

[0025] Figure 2 is a side view of the structure of the novel large-capacity, large-current, multi-busbar flexible connection transformer provided by the present utility model;

[0026] Figure 3 is a top view of the structure of the novel large-capacity, large-current, multi-busbar flexible connection transformer provided by the present utility model;

[0027] Figure 4 is a schematic structural diagram of a single-slot busbar clamp provided by the present utility model;

[0028] Figure 5 is a schematic structural diagram of a three-slot busbar clamp provided by the present utility model;

[0029] Figure 6 is a schematic structural diagram of a multi-slot busbar clamp provided by the present utility model.

[0030] In the figures: 1, transformer coil; 2, upper clamp; 3, lower clamp; 4, low-voltage lead; 5, vertical row; 6, horizontal row; 7, connection busbar; 8, flexible row; 9, bracket; 10, single-slot busbar clamp; 101, upper part of single-slot clamp; 102, lower part of single-slot clamp; 11, three-slot busbar clamp; 111, upper part of three-slot clamp; 112, lower part of three-slot clamp; 12, multi-slot busbar clamp; 121, upper part of multi-slot clamp; 122, lower part of multi-slot clamp. Detailed Embodiments

[0031] The following further detailed description of the present utility model is made in conjunction with the accompanying drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present utility model.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0034] In addition, the features, operations, and characteristics described in the specification can be combined in any appropriate manner to form various embodiments. Similarly, the steps or actions described in the method can also be adjusted in sequence in a manner that can be easily seen by those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for clearly describing a certain embodiment, rather than a sequence that must be followed, unless it is stated that a certain sequence must be followed. Embodiment

[0035] The present utility model provides a novel large-capacity, high-current, multi-busbar flexible connection transformer structure. Please refer to Figure 2 and Figure 3 , which includes a transformer coil 1, an upper clamping member 2, and a lower clamping member 3; the low-voltage leads 4 of the transformer coil 1 are sequentially connected to a connection busbar 7 extending into the transformer housing through multiple groups of vertical rows 5 and multiple groups of horizontal rows 6; one end of each group of vertical rows 5 is fixedly connected to the corresponding low-voltage lead 4 by bolts, and the other end is fixedly connected to the corresponding horizontal row 6 by bolts; each group of the horizontal rows 6 is also connected to the connection busbar 7 through a flexible busbar 8; one end of each group of flexible busbars 8 is fixedly connected to the corresponding horizontal row 6 by bolts, and the other end is fixedly connected to the corresponding connection busbar 7 by bolts.

[0036] The horizontal row 6 is a straight row, while the vertical row 5 is a Z-shaped row, and its bending angle can be flexibly adjusted according to specific circumstances.

[0037] In one embodiment, the connecting busbar 7 includes four phases of N, A, B, and C, and correspondingly, there are also four groups of vertical rows 5 and horizontal rows 6. When the A, B, and C phases of the connecting busbar 7 are of a four-copper-strip structure, the corresponding horizontal row 6 and flexible strip 8 are of a three-copper-strip structure; one end of the copper strip of the flexible strip 8 is inserted into the copper strip of the horizontal row 6 in an interleaved manner, and the other end of the copper strip of the flexible strip 8 is inserted into the copper strip of the connecting busbar 7 in an interleaved manner.

[0038] Further, the corresponding vertical row 5 is of a two-copper-strip structure, and the end of the copper strip of the vertical row 5 is inserted into the copper strip of the horizontal row 6 in an interleaved manner.

[0039] In one embodiment, when the A, B, and C phases of the connecting busbar 7 are of a five-copper-strip structure, the corresponding horizontal row 6 and flexible strip 8 are of a four-copper-strip structure; one end of the copper strip of the flexible strip 8 is inserted into the copper strip of the horizontal row 6 in an interleaved manner, and the other end of the copper strip of the flexible strip 8 is inserted into the copper strip of the connecting busbar 7 in an interleaved manner.

[0040] Further, the corresponding vertical row 5 is of a three-copper-strip structure, and the end of the copper strip of the vertical row 5 is inserted into the copper strip of the horizontal row 6 in an interleaved manner.

[0041] Specifically, a bracket 9 is further provided on the upper clamp 2 for supporting multiple groups of horizontal rows 6 extending horizontally; a busbar clamp is further provided on the horizontal row 6, and the horizontal row 6 is fixed to the bracket 9 through the busbar clamp. The horizontal row 6 in the entire lead structure composed of the vertical row 5, horizontal row 6, and flexible strip 8 has a long span, so it needs to be fixed by a combination of the bracket 9 and the busbar clamp at this place.

[0042] In one embodiment, as Figure 4 shown, the busbar clamp is a single-groove busbar clamp 10, and the single-groove busbar clamp 10 includes a single-groove clamp upper part 101 and a single-groove clamp lower part 102. A row groove is symmetrically opened in the middle between the single-groove clamp upper part 101 and the single-groove clamp lower part 102, and the N phase of the horizontal row 6 is clamped by bolts passing through the single-groove clamp upper part 101 and the single-groove clamp lower part 102.

[0043] In one embodiment, as Figure 5 shown, the busbar clamp is a three-groove busbar clamp 11, and the three-groove busbar clamp 11 includes a three-groove clamp upper part 111 and a three-groove clamp lower part 112. Three row grooves are symmetrically opened in the middle between the three-groove clamp upper part 111 and the three-groove clamp lower part 112, and any one of the A, B, and C phases of the horizontal row 6 is clamped by bolts passing through the three-groove clamp upper part 111 and the three-groove clamp lower part 112.

[0044] In one embodiment, as Figure 6As shown, there is a multi-groove busbar clamp 12, and the multi-groove busbar clamp 12 includes an upper multi-groove clamp 121 and a lower multi-groove clamp 122. A plurality of row grooves are symmetrically opened in the middle between the upper multi-groove clamp 121 and the lower multi-groove clamp 122. The N, A, B, and C phases of the horizontal row 6 of the clamp are clamped simultaneously by bolts passing through the upper multi-groove clamp 121 and the lower multi-groove clamp 122.

[0045] Adopting the fixing method of clamping the horizontal row 6 by the upper and lower busbar clamps greatly increases the contact surface of the fixed horizontal row 6, thereby ensuring the overall mechanical strength of the multi-busbar soft connection structure.

[0046] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention according to the above disclosure are within the protection scope of the claims.

Claims

1. A new type of large-capacity, large-current, multi-busbar soft-connected transformer structure, characterized in that: It comprises a transformer coil (1), an upper clamp (2) and a lower clamp (3); The low-voltage lead wire (4) of the transformer coil (1) is sequentially connected to a connecting busbar (7) extending into the transformer housing through a plurality of vertical rows (5) and a plurality of horizontal rows (6); One end of each vertical row (5) is connected and fixed to the corresponding low-voltage lead (4) by bolts, and the other end is connected and fixed to the corresponding horizontal row (6) by bolts; Each group of the horizontal rows (6) is also connected to the connecting busbar (7) via a flexible row (8); one end of each group of the flexible row (8) is connected and fixed to the corresponding horizontal row (6) via bolts, and the other end is connected and fixed to the corresponding connecting busbar (7) via bolts.

2. A novel large-capacity, large-current, multi-busbar soft-connected transformer structure as claimed in claim 1, characterized in that: The connecting busbar (7) includes four phases, namely, N, A, B, and C, and the corresponding vertical rows (5) and horizontal rows (6) are also provided in four groups each.

3. A novel large-capacity, large-current, multi-busbar soft-connected transformer structure as claimed in claim 2, characterized in that: When the three phases A, B, and C of the connecting busbar (7) are of a four-copper-bar structure, the corresponding horizontal bar (6) and the flexible bar (8) are of a three-copper-bar structure; one end of the copper bar of the flexible bar (8) is alternately plugged with the copper bar of the horizontal bar (6), and the other end of the copper bar of the flexible bar (8) is alternately plugged with the copper bar of the connecting busbar (7).

4. A novel large-capacity, large-current, multi-busbar soft-connected transformer structure as claimed in claim 3, characterized in that: The corresponding vertical row (5) is a two-copper bar structure, and the ends of the copper bars of the vertical row (5) are staggered and plugged with the copper bars of the horizontal row (6).

5. A novel large-capacity, large-current, multi-busbar soft-connected transformer structure as claimed in claim 2, characterized in that: When the three phases A, B, and C of the connecting busbar (7) are of a five-copper-bar structure, the corresponding transverse bar (6) and flexible bar (8) are of a four-copper-bar structure; one end of the copper bar of the flexible bar (8) is alternately plugged with the copper bar of the transverse bar (6), and the other end of the copper bar of the flexible bar (8) is alternately plugged with the copper bar of the connecting busbar (7).

6. A novel large-capacity, large-current, multi-busbar soft-connected transformer structure as claimed in claim 5, characterized in that: The corresponding vertical row (5) is a three-copper-bar structure, and the ends of the copper bars of the vertical row (5) are staggered and plugged with the copper bars of the horizontal row (6).

7. A novel large-capacity, large-current, multi-busbar soft-connected transformer structure as claimed in claim 2, characterized in that: The upper clamp (2) is also provided with a bracket (9) for supporting a plurality of groups of horizontal rows (6) extending horizontally.

8. A novel large-capacity, large-current, multi-busbar soft-connected transformer structure as claimed in claim 7, characterized in that: The horizontal row (6) is also provided with a busbar clamp, and the horizontal row (6) is fixed to the bracket (9) by the busbar clamp.

9. A novel large-capacity, large-current, multi-busbar soft-connected transformer structure as claimed in claim 8, characterized in that: The busbar clamp comprises: A single-slot busbar clamp (10), the single-slot busbar clamp (10) comprising a single-slot clamp upper portion (101) and a single-slot clamp lower portion (102), a row of slots being symmetrically provided between the single-slot clamp upper portion (101) and the single-slot clamp lower portion (102), and the N phases of the horizontal row (6) being clamped by bolts penetrating the single-slot clamp upper portion (101) and the single-slot clamp lower portion (102); A three-slot busbar clamp (11), the three-slot busbar clamp (11) comprising a three-slot clamp upper portion (111) and a three-slot clamp lower portion (112), three rows of slots being symmetrically provided between the three-slot clamp upper portion (111) and the three-slot clamp lower portion (112), and any phase A, B, or C of the horizontal row (6) being clamped by bolts penetrating the three-slot clamp upper portion (111) and the three-slot clamp lower portion (112); A multi-slot busbar clamp (12), the multi-slot busbar clamp (12) comprising a multi-slot clamp upper portion (121) and a multi-slot clamp lower portion (122), a plurality of rows of slots being symmetrically provided between the multi-slot clamp upper portion (121) and the multi-slot clamp lower portion (122), and the N, A, B, and C phases of a horizontal row (6) being clamped simultaneously by bolts penetrating the multi-slot clamp upper portion (121) and the multi-slot clamp lower portion (122).

10. A novel large-capacity, large-current, multi-busbar soft-connected transformer structure as claimed in claim 1, characterized in that: The horizontal row (6) is a vertical row, and the vertical row (5) is a Z-shaped row.

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