A switchgear assembly

Abstract

A switch cabinet group belongs to the technical field of power transmission and distribution equipment. It comprises a first switch cabinet and a second switch cabinet. The bottom of the second switch cabinet is provided with a transformer. The top of the first switch cabinet is provided with a first connecting row. The first connecting row extends into the second switch cabinet and is connected with the transformer through a vertically arranged second connecting row. It also comprises busbar reinforcing devices. The busbar reinforcing devices comprise a cabinet top reinforcing beam, a busbar clamp, a row clamp beam and a connecting rod. The cabinet top reinforcing beam is fixedly arranged on the top of the second switch cabinet. The row clamp beam is connected with the cabinet top reinforcing beam through the connecting rod. The busbar clamp is fixedly arranged on the row clamp beam. The first connecting row passes through the busbar clamp. Advantage: It provides reliable middle support and clamping for the horizontally extended first connecting row, significantly improves the mechanical stability of the busbar and can flexibly adjust the installation position of the busbar clamp to ensure that the second connecting row can accurately dock with the transformer outlet terminal.

Description

Technical Field

[0001] This utility model belongs to the technical field of power transmission and distribution equipment, and specifically relates to a switch cabinet assembly. Background Technology

[0002] Low-voltage switchgear, as a key piece of equipment for power distribution and control, is widely used in various places such as power plants, data centers, rail transit, and civil buildings, and is an indispensable and important component of modern power systems. In low-voltage power distribution systems, the electrical connection from the transformer to the low-voltage incoming cabinet is the "throat" of the entire power transmission path, and the quality of its connection method directly determines the safety, reliability, economy, and long-term operational stability of the power distribution system.

[0003] Currently, typical connection schemes between transformers and low-voltage incoming switchgear usually involve the following structure: In switchgear arranged side-by-side, a busbar extending horizontally from the top of one switchgear (e.g., an incoming switchgear) connects to the transformer outgoing terminals located at the bottom of the adjacent switchgear via a vertically arranged connecting bar. However, this connection method has revealed some technical defects in practical engineering applications: First, the horizontally extending busbar is usually quite long and relies solely on the support of the switchgear at both ends, leaving the middle section suspended or weakly supported. Under long-term operation or mechanical vibration, this section of the busbar is prone to vibration, displacement, or sagging, leading to stress concentration at the connection points. This can cause problems such as loose connections and increased contact resistance, and in severe cases, even electrical faults. Second, the vertical connecting bar requires high dimensional and angular accuracy to accommodate installation alignment, making on-site installation and adjustment difficult, time-consuming, and labor-intensive.

[0004] In view of the aforementioned existing technology, the applicant has made beneficial designs, and the technical solutions to be introduced below are produced in this context. Utility Model Content

[0005] The purpose of this utility model is to provide a switchgear assembly with a stable and reliable structure and convenient installation and adjustment, so as to solve the problem of poor electrical connection stability between the transformer and the low-voltage incoming cabinet.

[0006] The purpose of this utility model is achieved as follows: a switch cabinet assembly includes a first switch cabinet and a second switch cabinet arranged side by side. A transformer is installed at the bottom of the second switch cabinet, and a horizontally arranged first connecting bar is installed at the top of the first switch cabinet. The first connecting bar extends into the second switch cabinet and is connected to the transformer through a vertically arranged second connecting bar. The assembly also includes a busbar reinforcement device, which includes a cabinet top reinforcing beam, a busbar clamp, a clamp beam, and a connecting rod. The cabinet top reinforcing beam is fixedly installed on the top of the second switch cabinet. The clamp beam is connected to the cabinet top reinforcing beam through the connecting rod. The busbar clamp is fixedly installed on the clamp beam, and the first connecting bar passes through the busbar clamp.

[0007] In a specific embodiment of this utility model, the connecting rod is a double-ended screw rod, with both ends connected to the cabinet top reinforcing beam and the row clamping beam respectively by nuts.

[0008] In another specific embodiment of this utility model, the busbar clamp has a clamping hole through which the first connecting busbar passes.

[0009] In another specific embodiment of this utility model, the second connecting row is Z-shaped.

[0010] In another specific embodiment of this utility model, the second connecting row is a flexible connecting row.

[0011] Due to the aforementioned structure, this utility model offers several advantages over existing technologies: First, it enhances support stability. The rigid support frame formed by the busbar reinforcement device provides reliable central support and clamping for the horizontally extending first connecting busbar, effectively suppressing its vibration and displacement, and significantly improving the mechanical stability of the busbar. Second, it enables convenient adjustment. Through the cooperation of the connecting rod with the cabinet top reinforcing beam and the busbar clamp beam, the installation height and horizontal depth of the busbar clamp can be flexibly and precisely adjusted. This easily adapts to different installation heights of the first connecting busbar and ensures that the second connecting busbar can accurately connect with the transformer output terminals, greatly reducing the difficulty and precision requirements of on-site installation and improving installation efficiency and quality. Third, it enhances connection reliability. The busbar reinforcement device provides stable positioning and support for the busbar connection section, reducing mechanical stress at the connection point and ensuring long-term contact reliability of the electrical connection, thereby improving the safety, stability, and economy of the entire low-voltage power distribution system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the switch described in this utility model; Figure 2 This is a schematic diagram of the busbar reinforcement device described in this utility model.

[0013] In the diagram: 1. First switchgear; 2. Second switchgear; 3. Transformer; 4. First connecting bar; 5. Second connecting bar; 6. Busbar reinforcement device; 61. Cabinet top reinforcing beam; 62. Busbar clamp; 63. Bar clamp beam; 64. Connecting rod. Detailed Implementation

[0014] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0015] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model.

[0016] Please see Figure 1 This utility model relates to a switchgear assembly, comprising a first switchgear 1 and a second switchgear 2 arranged side by side. A transformer 3 is installed at the bottom of the second switchgear 2 to convert high-voltage electricity to low-voltage electricity. A horizontally arranged first connecting bar 4 is installed at the top of the first switchgear 1, extending into the second switchgear 2. Inside the second switchgear 2, a vertically arranged second connecting bar 5 electrically connects the end of the horizontally extending first connecting bar 4 to the output terminal of the transformer 3 located at the bottom of the cabinet, thereby completing the power transmission from the transformer 3 to the main busbar of the incoming line cabinet.

[0017] See Figure 2 and combined Figure 1This utility model also includes a busbar reinforcement device 6, which includes a cabinet top reinforcing beam 61, a busbar clamp 62, a clamp beam 63, and a connecting rod 64. The cabinet top reinforcing beam 61 is typically a sturdy steel section (such as channel steel or C-shaped steel), horizontally fixed to the top frame of the second switchgear 2 by bolts, serving as the main load-bearing base of the entire reinforcement device. Preferably, the cabinet top reinforcing beam 61 is located on the outer side of the top of the second switchgear 2, facilitating disassembly and assembly. The clamp beam 63 is located below the cabinet top reinforcing beam 61 and is connected to the cabinet top reinforcing beam 61 by the connecting rod 64. The clamp beam 63 is a horizontally arranged beam, the length of which can be designed according to the width of the first connecting bar 4 and the required number of support points. By changing the fixing position of the connecting rod 64 on the cabinet top reinforcing beam 61, the horizontal depth of the clamp beam 63 can be adjusted back and forth. In this embodiment, the connecting rod 64 is a double-ended screw. The lower end of the double-ended screw is connected to the clamping beam 63, and the upper end passes through a pre-set mounting hole on the cabinet top reinforcing beam 61. By tightening the nuts at both ends of the double-ended screw, the vertical height of the clamping beam 63 relative to the cabinet top reinforcing beam 61 can be precisely and continuously adjusted. The female busbar clamp 62 is fixedly mounted on the clamping beam 63 by bolts and is a clamping component made of insulating material (such as epoxy resin). The first connecting busbar 4 passes through the clamping hole on the female busbar clamp 62, enabling reliable clamping and positioning. In the above structure, the second connecting busbar 5 can be a Z-shaped rigid copper busbar or a flexible connecting busbar. Due to its good seismic resistance and installation tolerance, a flexible connecting busbar is preferred.

[0018] During on-site installation, the top reinforcing beam 61 is first fixed to the top of the second switchgear 2. Then, based on the actual position of the transformer 3's output terminals, the installation path of the second connecting strip 5 is initially determined. Next, by adjusting the nuts on the connecting rod 64, the strip clamping beam 63 is adjusted to match the designed height of the first connecting strip 4. Simultaneously, the installation point of the connecting rod 64 can be moved back and forth on the top reinforcing beam 61 to fine-tune the depth of the strip clamping beam 63, ensuring precise alignment of the end of the first connecting strip 4 held by it. Finally, the first connecting strip 4 is passed through the pre-positioned busbar clamp 62 and connected to the second connecting strip 5. The other end of the second connecting strip 5 is then connected to the transformer 3, thus achieving the electrical connection between the transformer and the low-voltage incoming cabinet. The entire process is intuitive and convenient, requiring no complex on-site bending or forceful correction of the busbars. It is compatible with connecting strips of different sizes and specifications, as well as different forms of second connecting strips (such as Z-type strips or flexible connections), exhibiting wide applicability and thus achieving the invention's objective.

Claims

1. A switchgear assembly, comprising a first switchgear (1) and a second switchgear (2) arranged side by side, wherein a transformer (3) is disposed at the bottom of the second switchgear (2), and a first connecting bar (4) arranged horizontally is disposed at the top of the first switchgear (1), the first connecting bar (4) extending into the second switchgear (2) and connected to the transformer (3) via a second connecting bar (5) arranged vertically, characterized in that: It also includes a busbar reinforcement device (6), which includes a cabinet top reinforcing beam (61), a busbar clamp (62), a clamp beam (63) and a connecting rod (64). The cabinet top reinforcing beam (61) is fixedly installed on the top of the second switch cabinet (2). The clamp beam (63) is connected to the cabinet top reinforcing beam (61) through the connecting rod (64). The busbar clamp (62) is fixedly installed on the clamp beam (63). The first connecting busbar (4) passes through the busbar clamp (62).

2. A switchgear assembly according to claim 1, characterized in that: The connecting rod (64) is a double-ended screw rod, and its two ends are connected to the cabinet top reinforcing beam (61) and the row clamping beam (63) respectively by nuts.

3. A switchgear assembly according to claim 1, characterized in that: The motherboard clamp (62) has a clamping hole through which the first connecting bar (4) passes.

4. A switchgear assembly according to claim 1, characterized in that: The second connecting row (5) is Z-shaped.

5. A switchgear assembly according to claim 1, characterized in that: The second connecting row (5) is a soft connecting row.

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