CN219760586U - General economic type inter-cabinet bus bridge connection structure - Google Patents

Abstract

The utility model discloses a general economic inter-cabinet bus bridge connection structure which comprises bases at the tops of two tray cabinets, a base frame, an insulator bracket and a three-phase bus group, wherein the base frame is arranged between the two bases and is flush with the bases, the insulator bracket is respectively arranged on the front wall and the rear wall in the base in an upper row and a lower row, the three-phase bus group is horizontally arranged in the base frame after vertically extending to the insulator bracket from the upper parts of the two tray cabinets in the base, the three-phase bus group is distributed in a delta shape in the front and the rear in the base frame when being seen from the side direction in the base frame, and the problem that the vertical height of the inter-cabinet lateral bus bridge structure is high, the environmental adaptability is low, the material consumption is large, and the same-direction phase sequence is difficult to arrange is solved by adopting the inter-cabinet lateral bus bridge connection scheme, so that the standardized bus installation and cost reduction are achieved.

Description

A general economical bus bridge connection structure between cabinets

Technical field

The utility model relates to the technical field of busbar devices for power transmission and distribution equipment, and is specifically a universal and economical busbar bridge connection structure between cabinets.

Background technique

With the development of economic construction, the demand for electricity has increased more and more. When the space in the power distribution room is limited and the panel cabinets need to be arranged across a span, the connection between the cabinets requires a closed bus bridge to play a bridging role. At present, in the industry, in order to ensure that the busbar bridge is connected through the top of the cabinet, it is necessary to extend the busbars in the panel upwards from the top of the cabinet and arrange them in a ladder-like manner according to the phase sequence; in order to ensure that the phase sequence of the power distribution system matches, the panel is produced In this stage, the branch buses in the two-sided panel cabinet where the bus bridge is located need to select one side for phase adjustment processing. For example: looking from left to right in front of the cabinet, the phase sequence of the busbars in the left cabinet is A, B, and C, and the phase sequence of the busbars in the right cabinet is The busbar phase sequences are C, B, and A respectively; in order to fully ensure the safe operation of the busbar after it is powered on, as shown in Figure 1, the spacing in the height space of the busbar layout in this solution will be relatively large. After the project is completed, the height of the bus bridge will generally be around 1.2-1.5m. Therefore, when using this solution, it is necessary to ensure that there is sufficient floor space in the on-site power distribution room, and there must be at least 1.5m of space from the top of the cabinet to the unobstructed part of the roof. This solution cannot be used in some power distribution rooms with lower floor heights; using this busbar bridge solution requires a lot of consumables for box production, including metal plates used in shell production and copper busbars in the bridge, etc., which is not very economical. The product has no competitive advantage. There is also another mature solution, such as the bus bridge connection method between the first switch cabinet and the second switch cabinet in a T-shaped bus bridge structure disclosed in patent document No. CN207409809U. This article simplifies it to Figure 2. Using this During the planning, in order to ensure that the phase sequence of the power distribution system is consistent, during the production stage of the panel, one side of the branch busbar in the panel where the bus bridge is located needs to be selected for phase adjustment, such as: looking from left to right in front of the cabinet, the left The phase sequences of the busbars in the side cabinet are C, B, and A, and the phase sequences of the busbars in the right cabinet are A, B, and C. In order to ensure that the busbar bridge is connected through the cabinet top, the busbars in the cabinet need to be extended upwards from the cabinet top. Extend a certain distance horizontally to the front (rear) direction of the cabinet, and then achieve horizontal connection through the transfer box of the "three-way structure"; the normal situation in the busbar bridge does not consider the phase modulation of the busbar. When the busbar in the cabinet is not phased , when the internal branches of the bus bridge need to be made into a phase modulation scheme, the bus bridge shell needs to be made higher in real time, that is, the H1 and H2 values will change as appropriate; the bus bridge shell of this scheme generally has an elevation At about 1m, although it is shorter than the previous solution, two bridge tubes need to be added in the horizontal direction. Some layouts in the power distribution room also need to be considered in real time, such as whether there are lighting chandeliers, cable trays and other obstructions where the bus bridge passes. If there are any, it is necessary to communicate with the site in a timely manner, and move the blocking objects appropriately after the bus bridge is installed; using this bus bridge solution, the cabinet production also has the disadvantages of the previous solution, that is, the consumption of consumables is large, including The metal plates used in the production of the casing and the copper bus bars in the bridge are not very economical and the product does not have a competitive advantage. Moreover, the phase modulation processing of these two solutions is contrary to the basic principle of the electric power standard that requires the switch cabinet to be arranged in the left, middle and right phase sequence in ABC phase sequence. In order to solve this problem, a patent document with the announcement number CN210669002U disclosed a A new type of bus bridge structure between cabinets in the same direction, including A1 phase busbar, A2 phase busbar, B1 phase busbar, B2 phase busbar, C1 phase busbar and C2 phase busbar located in the bus bridge shell, A1 phase busbar The row, B1 phase busbar, and C1 phase busbar increase in order from the outside to the inside, and the lower ends are respectively connected to the corresponding reserved busbars on the top of the G1 cabinet. The A2 phase busbar, B2 phase busbar, and C2 phase busbar are connected from the inside. It increases in height from the outside and the lower ends are connected to the corresponding cabinet top rows on the G2 cabinet. The use of this device can effectively prevent the A-phase cross-bar, B-phase cross-bar and C-phase cross-bar from interfering with the A1-phase busbar, A2-phase busbar, B1-phase busbar, B2-phase busbar, C1-phase busbar and C2-phase busbar. The busbars cross, thus effectively ensuring the normal use of the device.

However, because the three-phase busbars are arranged in sequence from top to bottom, this solution still requires a relatively high busbar layout space, has many restrictions on the roof structure and floor height, and requires a lot of box manufacturing consumables.

Utility model content

In view of the problems of the existing bus bridge structure with high vertical height, poor environmental adaptability, large material consumption, and difficulty in arranging the same phase sequence, the utility model provides a general economical bus bridge connection structure between cabinets to solve the above problems. question.

In order to achieve the above objectives, the present utility model is realized through the following technical solutions: a universal economical busbar bridge connection structure between cabinets, including two bases on the top of the cabinets, and a base in the middle of the two bases that is flush with the base. rack, insulator bracket and three-phase busbar group, which is characterized in that: the insulator bracket is divided into two rows, upper and lower, respectively installed on the front and rear walls inside the base, and the three-phase busbar group is vertical in the base from above the two panel cabinets. After extending to the insulator bracket, it is arranged horizontally in the base frame. The three-phase busbar group is distributed front and back in a "C-shaped" shape when viewed laterally inside the base frame.

Preferably, each phase bus group of the three-phase bus group includes a transition branch bus and a horizontal bus, and the horizontal bus and the vertical bus are connected at the insulator bracket.

Preferably, the transition branch busbar includes an inverted L-shaped busbar, the horizontal busbar is connected to one end of two inverted L-shaped busbars in the same phase, and the other end of the two inverted L-shaped busbars is connected to the cabinet top busbar.

Preferably, the transition branch busbar includes a blunt Z-shaped busbar, the horizontal busbar is connected to one end of two blunt Z-shaped busbars in the same phase, and the other end of the two blunt Z-shaped busbars is connected to the cabinet top busbar.

Preferably, the transition branch busbar includes a straight busbar, the horizontal busbar is connected to one end of two straight busbars in the same phase, and the other end of the two straight busbars is connected to the cabinet top busbar.

Preferably, the end of the inverted L-shaped busbar connected to the insulator bracket is also provided with a vertical bend.

Preferably, the insulator bracket uses epoxy resin high-voltage insulators.

Preferably, the base can be made by stacking multiple bases with different horizontal shapes one above the other.

Preferably, the base is provided with heat dissipation holes.

Preferably, the base frame is provided with heat dissipation holes.

This solution provides a universal and economical busbar bridge connection structure between cabinets. The phase sequence arrangement in the same direction is simple and does not exclude reverse arrangement. It has strong versatility. The specifications and shapes of the busbars in the bridge are uniform and undifferentiated. The installation process is light. It is easy to get started and does not require too much professional skills training; the formed bus bridge box is compact in appearance and requires less space margin in the power distribution room. The overall elevation can generally be controlled at about 1m, and there is no obvious depth in the front and rear direction. It is convex and does not affect the layout of other objects in the power distribution room, and can perfectly adapt to the on-site power distribution room environment; through appropriate gap design adjustments between different phases, it can meet the busbar penetration connection under different current levels, and the electrical safety insulation performance is sufficient Meets the standard; the shell consumes less consumables, the copper busbar is relatively standardized and standardized, there is no waste, and it has strong economic applicability.

Description of the drawings

Figure 1 is a schematic diagram of a conventional switch cabinet lateral connection bus bridge solution, a) is the main view, b) is the A-A side cross-sectional view, c) is the top view;

Figure 2 is a schematic diagram of the second scheme for lateral connection of the busbar bridge of the switch cabinet in the prior art. a) is the main view, b) is the A-A side cross-sectional view, and c) is the top view;

Figure 3 is a schematic diagram of an embodiment of the lateral "C-shape" connecting bus bridge structure between switch cabinets of the present invention, a) is the front view, b) is the A-A side cross-sectional view;

Figure 4 is a three-dimensional schematic diagram of the busbar arrangement of an embodiment of the lateral "C-shape" connection busbar bridge structure between switch cabinets of the present invention;

Figure 5 is a schematic diagram of another embodiment of the lateral "C-shape" connecting bus bridge structure between switch cabinets of the present invention, a) is the front view, b) is the A-A side cross-sectional view;

Among them, 1-roof, 11-beam, 2-ground, 3-base, 4-base frame.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all implementations. example. In the attached figure: H1 represents the height of the base frame, H2 represents the height of the base frame, H3 is the distance from the top insulator to the top of the base frame, b is the distance from the upper row of insulators to the top of the base frame, b1 is the spacing between the upper and lower rows of insulators, and W is the depth. Y is the distance between cabinets.

This embodiment provides a technical solution: a universal and economical inter-cabinet bus bridge connection structure, including two bases 3 on the top of two cabinets, two middle portions of the two bases 3 that are flush with the base 3 A base frame 4, two sets of insulator brackets and a three-phase busbar group. The two panel cabinets are installed on the ground 2 below the beam 11 on the roof 1. The base 3 can be stacked up and down by multiple bases 3 with different horizontal shapes. Made, the base frame 4 can also use more groups to adapt to different distances Y between cabinets. Each group of insulator brackets is nine, divided into upper and lower rows and installed on the front and rear walls of the base 3 respectively, so The above-mentioned insulator brackets are distributed in the same "Zigzag" shape when viewed from the side. The front wall is arranged in two rows with three in each row, and the rear wall is only arranged with three in the upper row. The rows above the front wall and the rear wall are of the same height. , the three-phase busbar group extends vertically from the top of the two panels to the insulator bracket in the base 3 and is horizontally arranged in the base frame 4. The three-phase busbar group is in the shape of a "Chinese character" when viewed sideways inside the base frame. "Distribution forward and backward.

Each phase bus group includes a transition branch bus and a horizontal bus, and the horizontal bus and the vertical bus are connected at the insulator bracket. The transition branch busbar includes an inverted L-shaped busbar, and the horizontal busbar is connected to one end of two inverted L-shaped busbars in the same phase. The inverted L-shaped busbar is connected to the insulator bracket end and is also provided with a vertical bend. The two inverted L-shaped busbars are connected to one end. The other end of the L-shaped busbar is connected to the cabinet top busbar; the transition branch busbar includes a blunt Z-shaped busbar, the horizontal busbar is connected to one end of two blunt Z-shaped busbars in the same phase, and the other ends of the two blunt Z-shaped busbars are connected to each other. Connect the cabinet top busbar; the transition branch busbar includes a straight busbar, the horizontal busbar is connected to one end of two straight busbars in the same phase, and the other end of the two straight busbars is connected to the cabinet top busbar.

Figures 3 and 4 show an embodiment of the same-direction phase sequence arrangement: after the branch busbars in the switch cabinet extend outside the cabinet top, the busbar phase sequence can be performed as usual, that is: when looking from left to right in front of the cabinet, the busbar phase sequence The sequences are A, B, and C respectively; there is no need to consider any additional phase modulation issues during the splicing process. Specifically, the base 3 on the top of the two switch cabinets is viewed from the front of the cabinet. The A phase on the left uses an inverted L-shaped busbar. , connect the horizontal busbar through the lower row of left insulator brackets on the front wall, the middle B phase uses a blunt Z-shaped busbar, connect the horizontal busbar through the upper row of middle insulator brackets on the front wall, and the right side C phase uses a straight busbar, through the rear The upper row of right insulator brackets on the wall connect to the horizontal busbars.

Figure 5 shows another embodiment of the reverse phase sequence arrangement. Even in the case of phase modulation of the branch buses in the panel cabinet in the early stage, by adjusting the installation position of the transition branch bus in the bridge, it is possible to ensure that the bus bridge is on the top of the cabinet. The orderly connection is as follows: viewed from the front of the cabinet, the left A phase in the base 3 on the top of the left switch cabinet uses an inverted L-shaped busbar, which is connected to the horizontal busbar through the lower row of left insulator brackets on the front wall. The horizontal busbar The other end is connected to the lower right insulator bracket on the front wall of the base 3 on the top of the right switch cabinet, and is connected to the right A phase through an inverted L-shaped bus bar; the middle B phase uses a blunt Z-shaped bus bar and passes through the front wall The upper middle row of insulator brackets on the upper row is connected to the horizontal bus; the right side C phase uses a straight busbar, which is connected to the horizontal bus through the upper row of right insulator brackets on the rear wall, and the other end of the horizontal bus is connected to the base on the top of the right switch cabinet 3. The upper left insulator bracket on the inner rear wall is connected to the left phase C through a straight busbar.

Viewed from the side, the "pin-shaped" distribution of insulators is not limited to ◥-like, ◤-like and other "pin-shaped" layouts can also be used, and the transition branch busbars can be changed accordingly.

The insulator bracket uses epoxy resin high-voltage insulators. By setting sufficient spacing b from the upper row of insulators to the top of the base frame, and spacing b1 between the upper and lower rows of insulators, sufficient safe insulation spacing is maintained between different phases, such as at least 130 mm.

Several sets of heat dissipation holes can also be opened on the base 3 and the base frame 4 to dissipate heat and relieve pressure of the running busbar.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "horizontal", "upper", "lower", "front", "back", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model. and simplified 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 therefore cannot be construed as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

The above are only preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person familiar with the technical field can, within the technical scope disclosed by the present utility model, implement the present utility model according to the present utility model. Novel technical solutions and utility model concepts, including equivalent substitutions or changes, shall be covered by the protection scope of the present utility model.

Claims (10)

1. A general economical bus bridge connection structure between cabinets, including two bases (3) on the top of the cabinets, and a base frame (4) in the middle of the two bases (3) that is flush with the base (3). , insulator bracket and three-phase busbar group, characterized in that: the insulator bracket is divided into two rows, upper and lower, respectively installed on the front and rear walls inside the base (3), and the three-phase busbar group is installed in the base (3) from both sides. Each panel cabinet extends vertically to the insulator bracket and is arranged horizontally in the base frame (4). The three-phase busbar group is distributed front and back in a "C-shaped" shape when viewed laterally inside the base frame. 2. A general economical bus bridge connection structure between cabinets according to claim 1, characterized in that: each phase bus group of the three-phase bus group includes a transition branch bus and a horizontal bus, and the horizontal bus and the vertical bus The busbars are connected at the insulator supports. 3. A universal economical busbar bridge connection structure between cabinets according to claim 2, characterized in that: the transition branch busbar includes an inverted L-shaped busbar, and the horizontal busbar connects two inverted L-shaped busbars in the same phase. One end and the other end of the two inverted L-shaped busbars are connected to the cabinet top busbar. 4. A universal economical busbar bridge connection structure between cabinets according to claim 2, characterized in that: the transition branch busbar includes a blunt Z-shaped busbar, and the horizontal busbar connects two blunt Z-shaped busbars in the same phase. One end and the other end of the two blunt Z-shaped busbars are connected to the cabinet top busbar. 5. A universal economical busbar bridge connection structure between cabinets according to claim 2, characterized in that: the transition branch busbar includes a straight busbar, and the horizontal busbar connects one end of two straight busbars in the same phase, The other ends of the two straight busbars are connected to the cabinet top busbar. 6. A universal economical busbar bridge connection structure between cabinets according to claim 3, characterized in that the inverted L-shaped busbar connecting insulator bracket end is also provided with a vertical bend. 7. A universal economical bus bridge connection structure between cabinets according to claim 1, characterized in that the insulator bracket uses epoxy resin high-voltage insulators. 8. A universal economical bus bridge connection structure between cabinets according to claim 1, characterized in that the base (3) can be made by stacking multiple bases (3) of different horizontal shapes up and down. 9. A universal economical bus bridge connection structure between cabinets according to claim 1, characterized in that: the base is provided with heat dissipation holes. 10. A universal economical bus bridge connection structure between cabinets according to claim 1, characterized in that: the base frame (4) is provided with heat dissipation holes.