Bus flexible connection structure for dry-type transformer

Abstract

According to the bus flexible connection structure for the dry-type transformer, bus supports are vertically arranged on the upper sides of the two ends of an upper clamping piece, the bus supports are arranged on the two sides of the middle of a coil, extension rods are longitudinally arranged at the top ends of the bus supports, insulators are longitudinally arranged above the extension rods through insulation supports, and the insulation supports are arranged on the top ends of the extension rods. The insulators are transversely connected with the phase connecting bars, one end of each phase connecting bar is fixedly connected with the low-voltage lead in a bending manner, the other end of each phase connecting bar is connected with the conductive connection bus through flexible connection, and the bending end of the N-phase connecting bar is arranged on the outer side of the insulator at the far end, so that the original pure rigid connection structure of the low-voltage side outgoing bus is changed; the flexible connection bus is introduced, and flexible connection is injected into a pure rigid connection structure, so that negative effects of mechanical displacement, mechanical vibration and noise caused by rigid connection are compensated, the satisfaction degree of customers is further improved, and the market competitive advantage of a company is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of dry-type transformer busbar flexible connection, and specifically relates to a busbar flexible connection structure for dry-type transformer. Background Art

[0002] The low-voltage outlet methods of dry-type transformers include copper busbar side outlet, copper busbar top outlet and cable bottom outlet, which are used to connect the transformer and the low-voltage cabinet, and the bars are fixed with bolts.

[0003] like Figure 3 As shown, heat and vibration will be generated during the operation of the transformer. The hard copper busbar connected to it will cause slight deformation and mechanical displacement due to heat or vibration during use. This rigid connection requires that the concentricity of the connecting part is extremely high. Any slight error will cause mechanical vibration, and in severe cases it will lead to serious equipment failure.

[0004] Therefore, soft connections came into being. Flexible soft connections can improve electrical conductivity, adjust equipment installation errors, and play a role in vibration isolation and noise reduction. Utility Model Content

[0005] In order to solve the above problems, this paper proposes a busbar soft connection structure for a dry-type transformer, a coil is arranged inside the transformer, an upper clamp and a lower clamp are arranged at the upper and lower ends of the coil respectively, a low-voltage lead is extended from the upper end of the coil, busbar supports are arranged vertically on the upper sides of the two ends of the upper clamp, the busbar supports are arranged on both sides of the middle of the coil, an extension rod is longitudinally arranged on the top of the busbar support, an insulator is longitudinally arranged above the extension rod through an insulating bracket, the insulator is horizontally connected with a phase connection row, one end of the phase connection row is bent The phase connection row is fixedly connected to the low-voltage lead, and the other end of the phase connection row is connected to the conducting busbar through a soft connection. The phase connection row includes an A-phase connection row, a B-phase connection row, a C-phase connection row and an N-phase connection row. The bent end of the N-phase connection row is arranged on the outside of the insulator at the far end, which changes the original purely rigid connection structure of the low-voltage side-outgoing busbar. By introducing the soft-connected busbar, a flexible connection is injected into the purely rigid connection structure, which compensates for the negative effects of mechanical displacement, mechanical vibration and noise caused by the rigid connection, further improves customer satisfaction, and enhances the company's market competitiveness.

[0006] The outer side of the coil is provided with a housing. On the right side of the upper end of the housing, there is a phase connection terminal. Inside the phase connection terminal, there is a conducting bus bar running through. The phase connection terminal includes an A-phase terminal, a B-phase terminal, a C-phase terminal, and an N-phase connection row. The upper clamp and the lower clamp are two-end combined clamping frames. Inside both the upper clamp and the lower clamp, there is an iron core. The bottom of the lower clamp is connected to the vehicle frame. Vertically above the two ends of the upper clamp, there are bus bar supports. Vertically at the rear end of the upper clamp, there is a lead terminal, which is connected to the low-voltage lead. The design idea of this bus bar flexible connection is flexible, and different design schemes are adopted according to local conditions. There are three sections of bus bar connections from the low-voltage inlet and outlet ends of the transformer to the connection bus bar extending into the housing from the low-voltage cabinet, namely: the phase connection vertical row, the phase connection horizontal row, and the flexible connection. By integrating flexible connection into a completely rigid connection structure, it not only does not affect the mechanical strength of the original rigid connection, but also reduces the mechanical displacement, mechanical vibration, and noise caused by the rigid connection.

[0007] The phase connection row includes a phase connection horizontal row and a phase connection vertical row. One end of the phase connection horizontal row is connected to the phase connection vertical row through a bent row, and the other end of the phase connection horizontal row is connected to the conducting bus bar through a flexible connection. The phase connection vertical row is fixedly connected to the low-voltage lead. Due to the limitation of the installation space of the transformer, when the length dimension of the transformer housing is relatively small, the connection horizontal row of the phase closest to the outlet side of the housing can be cancelled, and the corresponding flexible connection is extended to be connected and fixed to the phase connection vertical row. This flexible connection not only takes into account the characteristics of the connection horizontal row but also plays the role of a flexible connection, maintaining the overall mechanical strength of the connection bus bar.

[0008] The shape of the bus bar support is a portal support. The bus bar support is straddled above the upper clamp. At the rear end of the bus bar support, there is an extended rod. Vertically above the extended rod, there is an insulating support. The phase connection horizontal rows are all horizontal straight rows, and the length of the phase connection horizontal row is less than the horizontal length of the bus bar support. The phase connection horizontal row is connected and fixed to the corresponding phase connection vertical row with bolts. Due to the relatively large span of the phase connection horizontal row, it is necessary to ensure the mechanical strength of the overall lead structure through the combination and fixation of the bus bar support and the insulator. One end of the flexible connection is connected and fixed to the phase connection horizontal row, and the other end of the flexible connection is connected and fixed to the connection bus bar extending into the housing with bolts. By adding the flexible connection, flexible connection is injected into the entire rigid connection lead structure. The combination of rigidity and flexibility not only ensures the overall strength of the lead structure but also adjusts the installation error of the equipment and plays the role of vibration isolation and noise reduction.

[0009] Beneficial effects:

[0010] It changes the original pure rigid connection structure of the low-voltage side outgoing bus bar. By introducing a flexible connection bus bar, flexible connection is injected into the pure rigid connection structure, compensating for the negative effects of mechanical displacement, mechanical vibration, and noise caused by the rigid connection, further enhancing customer satisfaction and improving the company's market competitiveness.

[0011] The vertically connected rows are respectively connected to the incoming and outgoing terminal rows of the low-voltage leads of the transformer body by bolts, and the horizontally connected row is connected and fixed to the corresponding vertically connected row by bolts; since the horizontally connected row has a relatively large span, it needs to be fixed by a combination of busbar supports and insulators to ensure the mechanical strength of the overall lead structure. One end of the flexible connection is connected and fixed to the horizontally connected row, and the other end of the flexible connection is connected and fixed to the connecting busbar extending into the housing by bolts. By adding the flexible connection, a flexible connection is injected into the overall rigidly connected lead structure. The combination of rigidity and flexibility not only ensures the overall strength of the lead structure, but also adjusts the installation error of the equipment and plays a role in vibration isolation and noise reduction.

[0012] Due to the limitation of the installation space of the transformer, when the length dimension of the transformer housing is small, the horizontally connected row of the phase closest to the outgoing side of the housing can be cancelled, and the corresponding flexible connection is extended to be connected and fixed to the vertically connected row. This flexible connection not only takes into account the characteristics of the horizontally connected row, but also plays the role of a flexible connection, maintaining the overall mechanical strength of the connecting busbar.

[0013] The design idea of this busbar flexible connection structure is flexible, and different design schemes are adopted according to local conditions. There are three sections of busbar connections from the low-voltage incoming and outgoing terminals of the transformer to the connecting busbar extending into the housing from the low-voltage cabinet, namely: the vertically connected row, the horizontally connected row and the flexible connection. Flexible connection is incorporated into a completely rigid connection structure, which not only does not affect the mechanical strength of the original rigid connection, but also reduces the mechanical displacement, mechanical vibration and noise caused by the rigid connection. Description of the Drawings

[0014] Figure 1 It is a top view of a busbar flexible connection structure for a dry-type transformer;

[0015] Figure 2 It is a side view of a busbar flexible connection structure for a dry-type transformer;

[0016] Figure 3 It is a top view of the existing connection structure of a dry-type transformer;

[0017] In the figure: 1. upper clamping piece, 2. lower clamping piece, 3. low-voltage lead, 4. busbar support, 5. insulating support, 6. insulator, 7. horizontally connected row, 8. vertically connected row, 9. flexible connection, 10. housing, 11. connecting busbar, 12. vehicle frame, 13. coil. Detailed Implementation Modes

[0018] To deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0019] Upper clamping piece 1, lower clamping piece 2, low-voltage lead 3, busbar support 4, insulating support 5, insulator 6, connected horizontal row 7, connected vertical row 8, flexible connection 9, housing 10, connecting busbar 11, vehicle frame 12, coil 13.

[0020] As Figure 1 、 2 shown;

[0021] A busbar flexible connection structure for a dry-type transformer. Inside the transformer, there is a coil 13. Upper clamping piece 1 and lower clamping piece 2 are respectively arranged at the upper and lower ends of the coil 13. At the upper end of the coil 13, there is an extended low-voltage lead 3. On the upper sides of both ends of the upper clamping piece 1, there are vertically arranged busbar supports 4. The busbar supports 4 are arranged on both sides of the middle part of the coil 13. At the top of the busbar support 4, there is a longitudinally arranged extension rod. Above the extension rod, there is an insulator 6 longitudinally arranged through an insulating support 5. The insulator 6 is provided with a connected row in a transverse connection manner. One end of the connected row is bent and fixed to be connected with the low-voltage lead 3, and the other end of the connected row is connected with the connecting busbar 11 through a flexible connection 9. The connected row includes an A-phase connected row, a B-phase connected row, a C-phase connected row, and an N-phase connected row. The bent end of the N-phase connected row is arranged outside the insulator 6 at the far end. The connected row includes a connected horizontal row 7 and a connected vertical row 8. One end of the connected horizontal row 7 is connected with the connected vertical row 8 through a bent row, and the other end of the connected horizontal row 7 is connected with the connecting busbar 11 through a flexible connection 9. The connected vertical row 8 is fixedly connected with the low-voltage lead 3. Outside the coil 13, there is a housing 10. On the right side of the upper end of the housing 10, there is a phase connector. Inside the phase connector, there is a connecting busbar 11 running through. The phase connector includes an A-phase connector, a B-phase connector, a C-phase connector, and an N-phase connected row. The upper clamping piece 1 and the lower clamping piece 2 are two-end combined clamping frames. Inside both the upper clamping piece 1 and the lower clamping piece 2, there is an iron core. The bottom of the lower clamping piece 2 is connected with the vehicle frame 12. Above the upper ends of both ends of the upper clamping piece 1, there are vertically arranged busbar supports 4. At the rear end of the upper clamping piece 1, there is a longitudinally vertical lead terminal. The lead terminal is connected with the low-voltage lead 3. The shape of the busbar support 4 is a portal support. The busbar support 4 is arranged across the upper part of the upper clamping piece 1. At the rear end of the busbar support 4, there is an extended extension rod. Above the extension rod, there is an insulating support 5 arranged vertically. The connected horizontal rows 7 are all horizontal straight rows. The length of the connected horizontal row 7 is less than the horizontal length of the busbar support 4.

[0022] Implementation example;

[0023] The vertically connected rows 8 are respectively connected to the incoming and outgoing terminal rows of the low-voltage leads 3 of the transformer body with bolts. The horizontally connected row 7 is connected and fixed to the corresponding vertically connected row 8 with bolts. Since the horizontally connected row 7 has a relatively large span, it needs to be fixed through the combination of the busbar support 4 and the insulator 6 to ensure the mechanical strength of the overall lead structure. One end of the flexible connection 9 is connected and fixed to the horizontally connected row 7, and the other end of the flexible connection 9 is connected and fixed to the connection busbar extending into the housing 10 with bolts.

[0024] The structural design idea of the busbar flexible connection 9 is flexible, and different design schemes are adopted according to local conditions. There are three sections of busbar connections from the low-voltage incoming and outgoing terminals of the transformer to the connection busbar extending into the housing 10 by the low-voltage cabinet, namely: the vertically connected row 8, the horizontally connected row 7, and the flexible connection 9. Flexible connection is incorporated into a completely rigid connection structure, which not only does not affect the mechanical strength of the original rigid connection, but also reduces the mechanical displacement, mechanical vibration, and noise caused by the rigid connection.

[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A busbar flexible connection structure for a dry-type transformer, wherein a coil is provided inside the transformer, an upper clamp and a lower clamp are provided at the upper and lower ends of the coil respectively, and a low-voltage lead is provided extending from the upper end of the coil, characterized in that: Busbar supports are vertically provided on the upper sides of both ends of the upper clamp, and the busbar supports are arranged on both sides of the middle part of the coil. An extension rod is longitudinally provided on the top of the busbar support, and an insulator is longitudinally provided above the extension rod through an insulating support. The insulator is horizontally connected with a phase connection row, one end of the phase connection row is bent and fixedly connected to the low-voltage lead, and the other end of the phase connection row is connected to the conducting bus through a flexible connection. The phase connection row includes an A-phase connection row, a B-phase connection row, a C-phase connection row and an N-phase connection row, and the bent end of the N-phase connection row is arranged on the outside of the insulator at the far end.

2. A busbar flexible connection structure for a dry-type transformer according to claim 1, characterized in that: The phase-connected row includes a phase-connected horizontal row and a phase-connected vertical row. One end of the phase-connected horizontal row is connected to the phase-connected vertical row through a bend row, and the other end of the phase-connected horizontal row is connected to the conducting busbar through a flexible connection. The phase-connected vertical row is fixedly connected to the low-voltage lead.

3. The busbar flexible connection structure for a dry-type transformer according to claim 1, characterized in that: A shell is provided on the outside of the coil, a phase joint is provided on the right side of the upper end of the shell, a conducting busbar is passed through the inner side of the phase joint, and the phase joint includes an A phase joint, a B phase joint, a C phase joint and an N phase connecting bar.

4. The busbar flexible connection structure for a dry-type transformer according to claim 1, characterized in that: The upper clamp and the lower clamp are combined clamping frames at both ends. The inner sides of the upper clamp and the lower clamp are provided with iron cores. The bottom of the lower clamp is connected to the frame. Busbar supports are vertically provided above the two end frames of the upper clamp. Lead terminals are vertically provided at the rear end of the upper clamp. The lead terminals are connected to the low-voltage leads.

5. The busbar flexible connection structure for a dry-type transformer according to claim 1, characterized in that: The busbar support is in the shape of a door-type support. The busbar support is arranged above the upper clamp in a bridging manner. An extension rod is extended at the rear end of the busbar support. An insulating support is vertically arranged above the extension rod.

6. A busbar flexible connection structure for a dry-type transformer according to claim 2, characterized in that: The connected horizontal rows are all horizontal vertical rows, and the length of the connected horizontal rows is smaller than the horizontal length of the busbar support.

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