Busbar frame of high current switchboard and switchboard

Abstract

The utility model provides a kind of busbar frame and switchboard of large current switch board, wherein, the busbar frame of this large current switch board includes first fixed plate and second fixed plate, wherein, the length direction of first fixed plate is perpendicular to the length direction of C-type busbar, first fixed plate bottom is equipped with the first through slot for accommodating C-type busbar, and first through slot is equipped with first limiting protrusion, first limiting protrusion is connected with first fixed plate, and first limiting protrusion is located at one side of C-type busbar;Second fixed plate is arranged below first fixed plate to hold C-type busbar, and first fixed plate top is equipped with second through slot, the width of second through slot is greater than the width of C-type busbar to form the activity redundancy of C-type busbar, and first limiting protrusion and C-type busbar are all clamped in two through slots.Compared with prior art, the utility model improves busbar frame, solves the technical problem that the existing C-type busbar is not assembled conveniently on switchboard.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment, and more specifically, it relates to a busbar frame of a high current distribution cabinet. This utility model also relates to a distribution cabinet. Background Technology

[0002] A distribution cabinet is a general term for a motor control center. Distribution cabinets are used in situations where the load is relatively dispersed and there are fewer circuits; motor control centers are used in situations where the load is concentrated and there are more circuits. They distribute the electrical energy from a circuit of the upstream power distribution equipment to the nearest load. This level of equipment should provide protection, monitoring, and control for the load.

[0003] From a hierarchical perspective, primary power distribution equipment is collectively referred to as power distribution centers. These are centrally installed in the enterprise's substation, distributing electrical energy to lower-level distribution equipment in different locations. This level of equipment is located close to the step-down transformer, therefore requiring higher electrical parameters and larger output circuit capacity. Secondary power distribution equipment is a collective term for power distribution cabinets and motor control centers. Power distribution cabinets are used in situations where loads are relatively dispersed and there are fewer circuits; motor control centers are used in situations where loads are concentrated and there are more circuits. They distribute electrical energy from a circuit of the previous-level power distribution equipment to nearby loads. This level of equipment should provide protection, monitoring, and control for the loads. The final level of power distribution equipment is collectively referred to as lighting and power distribution boxes. These are located far from the power supply center and are distributed, small-capacity distribution equipment.

[0004] During the assembly of the distribution cabinet, it is necessary to position the C-type busbar and establish the connection between the C-type busbar and the copper busbar. However, the C-type busbar is generally connected to the copper busbar bolt by T-shaped screws that snap into itself. As a result, due to the space limitations of the distribution cabinet, the C-type busbar needs to be connected to the T-shaped nut before positioning. This greatly restricts the subsequent assembly position of the C-type busbar, making the assembly of the C-type busbar on the distribution box extremely inconvenient and urgently requiring improvement. Utility Model Content

[0005] The purpose of this utility model is to provide a busbar frame for a high-current distribution cabinet to solve the technical problem of the inconvenience of assembling existing C-type busbars on distribution cabinets.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a busbar frame for a high-current distribution cabinet, comprising: The first fixing plate has a length direction perpendicular to the length direction of the C-shaped busbar. The bottom of the first fixing plate has a first through groove for accommodating the C-shaped busbar, and the first through groove has a first limiting protrusion. The first limiting protrusion is connected to the first fixing plate and is located on one side of the C-shaped busbar. The second fixing plate is arranged side by side below the first fixing plate to clamp the C-shaped busbar. The top of the first fixing plate is provided with a second through groove. The width of the second through groove is greater than the width of the C-shaped busbar to form a movable redundancy for the C-shaped busbar. The first limiting protrusion and the C-shaped busbar are both engaged in the second through groove.

[0007] In one feasible implementation, the busbar frame of the high-current distribution cabinet further includes a third fixing plate, which is arranged side by side above the first fixing plate to clamp the C-shaped busbar. The top of the first fixing plate has a third through groove, and the bottom of the third fixing plate has a fourth through groove. The fourth through groove and the third through groove are arranged vertically to form a clamping space for the C-shaped busbar. The fourth through groove has a second limiting protrusion, which is connected to the third fixing plate and is located on one side of the C-shaped busbar.

[0008] In one feasible implementation, the first fixing plate consists of multiple plates stacked in the vertical direction, and the lower third through slot and the upper first through slot together form a clamping space for the C-shaped busbar.

[0009] In one feasible implementation, the busbar frame of the high-current distribution cabinet further includes fixing bolts that penetrate the third fixing plate, the first fixing plate, and the second fixing plate in a vertical direction.

[0010] In one feasible implementation, the busbar frame of the high-current distribution cabinet further includes a pad, which is located on the side of the first limiting protrusion facing the C-shaped busbar.

[0011] In one feasible implementation, both the first fixing plate and the second fixing plate are made of insulating plastic or insulating ceramic.

[0012] Compared with existing technologies, the beneficial effects of the busbar frame of the high-current distribution cabinet provided by this utility model are as follows: First, the first and second fixing plates work together to place the C-shaped busbar in the first through slot and use the first limiting protrusion for initial positioning on one side. At the same time, the lateral gap provided by the widened second through slot at the top allows the C-shaped busbar to be adjusted in the horizontal plane before final tightening. This provides flexible adjustment space for the installation position of the busbar, ensuring that the opening on the side of the C-shaped busbar can be accurately aligned with and accommodate the head of the T-bolt in the distribution cabinet. This simplifies the installation process and improves the success rate of connection, thus solving the technical problem that the C-shaped busbar and T-bolt are difficult to quickly snap together due to manufacturing tolerances or installation errors.

[0013] Secondly, the third fixing plate works together with the first fixing plate from above, and its fourth through groove at the bottom aligns with the third through groove of the first fixing plate to form a closed constraint channel. The second limiting protrusion and the first limiting protrusion below can stably hold the C-shaped busbars located in different layers in the horizontal direction, restricting the displacement and warping of the busbars in the horizontal direction, and enhancing the fixing stiffness and vibration resistance of the busbars.

[0014] In addition, multiple first fixing plates are stacked and combined vertically, so that the through slots of adjacent fixing plates (the top slot of the lower plate and the bottom slot of the upper plate) are naturally connected, and together they form a continuous support structure that runs through multiple layers. This can lock multiple C-shaped busbars at different heights, thereby realizing the three-dimensional and modular layered arrangement of busbars in the cabinet, optimizing the use of space in the cabinet, facilitating the distribution of multiple currents, and solving the technical problems of complex inter-layer fixing structure of busbars, large space occupation, and inconvenient installation in the traditional method.

[0015] Furthermore, the fixing bolts pass through all the fixing plate layers from top to bottom. When the nuts are tightened, the resulting clamping force is evenly transmitted to each fixing plate, which can tightly connect all the independent fixing plate units into a solid overall frame, thereby significantly enhancing the overall structural stability and mechanical strength of the busbar frame.

[0016] A pad is placed between the first limiting protrusion and the metal surface of the C-shaped busbar. A layer of elastic or soft material is inserted at the interface where the two contact, which can fill the gap and absorb part of the clamping force during the tightening process, thereby preventing the hard protrusion from directly scratching or indenting the busbar surface. In addition, by selecting pads of different thicknesses, it is also possible to adapt to C-shaped busbars of different specifications, thereby improving the applicability of the busbar frame in this utility model.

[0017] Another objective of this utility model is to provide a power distribution cabinet, including the busbar frame of the high-current power distribution cabinet mentioned above.

[0018] In one feasible implementation, the distribution cabinet further includes T-bolts and copper busbars, wherein the nuts of the T-bolts are snapped into the C-type busbars, and the T-bolts are bolted to the copper busbars.

[0019] In one feasible implementation, the copper busbars are multiple ones arranged at intervals along the length direction of the C-shaped busbar.

[0020] Compared to existing technologies, the distribution cabinet of this utility model possesses all the advantages of the busbar frame of the aforementioned high-current distribution cabinet, which will not be elaborated here. At the same time, during installation inside the cabinet, the busbar frame, through its unique movable redundancy design, allows operators to easily fine-tune the final position of the C-shaped busbar, ensuring that the busbar side slot and the already positioned T-bolts can be quickly and smoothly engaged. This significantly shortens the assembly and wiring time of the distribution cabinet, thereby improving production efficiency and facilitating subsequent maintenance and replacement. This also helps to solve the technical problem of existing distribution cabinets where the busbar needs to be inserted into the busbar frame from the side to avoid the T-bolts.

[0021] In addition, the head of the T-bolt is inserted into the groove of the C-type busbar, and the screw part passes through the hole on the copper busbar and is locked with a nut. This forms a solid connection point that is easy to install and position and can withstand the thermal stress and electric force generated by the large current. This ensures the efficient and stable transmission of electrical energy from the busbar to the branch copper busbar, reduces the contact resistance and temperature rise of the connection point, and solves the technical problem of overheating and damage to the connection point due to poor contact in the high current circuit.

[0022] Furthermore, the aforementioned multiple copper busbars are distributed and installed at certain intervals along the length of the C-shaped busbar. Each copper busbar is electrically connected to the busbar through an independent T-bolt, which can distribute the total current to multiple connection points, thereby achieving uniform distribution of current load and providing redundant connection paths, improving the system's current carrying capacity and power supply reliability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the assembly of the busbar frame and the C-type busbar of the high-current distribution cabinet provided by this utility model. Figure 2 The busbar in the distribution cabinet of this utility model is...

[0024] In the picture: 1. First fixing plate; 11. First through groove; 12. Third through groove; 13. First limiting protrusion; 2. Second fixing plate; 21. Second through groove; 3. Third fixing plate; 31. Fourth through groove; 32. Second limiting protrusion; 4. Type C busbar; 5. T-bolts; 6. Copper busbar. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0026] In the description of this utility model, it should be noted that if terms such as "upper", "lower", "inner", "back" or indicating orientation or positional relationship appear, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, a connection 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 a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0028] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] Please refer to the following: Figures 1 to 2 The busbar frame of the high-current distribution cabinet provided by this utility model will now be described. The busbar frame of the high-current distribution cabinet includes a first fixing plate 1 and a second fixing plate 2. The length direction of the first fixing plate 1 is perpendicular to the length direction of the C-type busbar 4. The bottom of the first fixing plate 1 is provided with a first through groove 11 for accommodating the C-type busbar 4, and a first limiting protrusion 13 is provided in the first through groove 11. The first limiting protrusion 13 is connected to the first fixing plate 1 and is located on one side of the C-type busbar 4. The second fixing plate 2 is arranged side by side below the first fixing plate 1 to clamp the C-type busbar 4. The top of the first fixing plate 1 is provided with a second through groove 21. The width of the second through groove 21 is greater than the width of the C-type busbar to form a movable redundancy for the C-type busbar 4. The first limiting protrusion 13 and the C-type busbar 4 are both engaged in the second through groove.

[0030] Compared to existing technologies, in this embodiment, the first fixing plate 1 and the second fixing plate 2 work together during implementation. By placing the C-shaped busbar 4 in the first through groove 11 and using the first limiting protrusion 13 for initial positioning on one side, and with the help of the lateral gap provided by the widened second through groove 21, the C-shaped busbar 4 can be adjusted in the horizontal plane before final tightening. This provides flexible adjustment space for the installation position of the busbar, thereby ensuring that the opening on the side of the C-shaped busbar 4 can be accurately aligned with and accommodate the head of the T-bolt 5 in the distribution cabinet. This simplifies the installation process and improves the success rate of connection, thus solving the technical problem that the C-shaped busbar 4 and the T-bolt 5 are difficult to quickly snap together due to manufacturing tolerances or installation errors.

[0031] In addition to the feasible implementation methods described above, in one feasible embodiment, the busbar frame of the high-current distribution cabinet also includes a third fixing plate 3. The third fixing plate 3 is arranged side by side above the first fixing plate 1 to clamp the C-shaped busbar 4. The top of the first fixing plate 1 is provided with a third through groove 12, and the bottom of the third fixing plate 3 is provided with a fourth through groove 31. The fourth through groove 31 and the third through groove 12 are arranged vertically to form a clamping space for the C-shaped busbar 4. The fourth through groove 31 is provided with a second limiting protrusion 32, which is connected to the third fixing plate 3 and is located on one side of the C-shaped busbar 4. Compared to the prior art, the third fixing plate 3 of this embodiment can cooperate with the first fixing plate 1 below it. The fourth through groove 31 at its bottom is aligned with the third through groove 12 of the first fixing plate 1 to form a closed constraint channel. The second limiting protrusion 32 and the first limiting protrusion below can stably hold the C-shaped busbars 4 located in different layers in the horizontal direction, restricting the displacement and warping of the busbars in the horizontal direction, and enhancing the fixing stiffness and vibration resistance of the busbars.

[0032] In one feasible embodiment, multiple first fixing plates 1 are stacked in the vertical direction, with the lower third through slot 12 and the upper first through slot 11 forming a clamping space for the C-shaped busbar 4. By stacking multiple first fixing plates 1 vertically, the through slots of adjacent fixing plates (the top slot of the lower plate and the bottom slot of the upper plate) are naturally connected, jointly constructing a continuous support structure that runs through multiple layers. This allows multiple C-shaped busbars 4 to be locked at different heights, thereby achieving a three-dimensional, modular, and layered arrangement of the busbars within the cabinet. This optimizes the use of space within the cabinet, facilitates multi-path current distribution, and solves the technical problems of complex inter-layer busbar fixing structures, large space occupation, and inconvenient installation in traditional methods.

[0033] In addition to the feasible implementation methods described above, in order to secure the multiple vertically arranged fixing plates, in one feasible embodiment, the busbar frame of the high-current distribution cabinet also includes fixing bolts. These fixing bolts penetrate the third fixing plate 3, the first fixing plate 1, and the second fixing plate 2 in a vertical direction. In this embodiment, the fixing bolts pass through all fixing plate layers from top to bottom. When the nuts are tightened, the resulting clamping force is evenly transmitted to each fixing plate, tightly connecting all the independent fixing plate units into a robust overall frame, thereby significantly enhancing the overall structural stability and mechanical strength of the busbar frame.

[0034] In one feasible embodiment, the busbar frame of the high-current distribution cabinet further includes a pad, which is disposed on the side of the first limiting protrusion 13 facing the C-type busbar. Preferably, the pad is made of insulating rubber or plastic. With this arrangement, the pad is located between the first limiting protrusion 13 and the metal surface of the C-type busbar 4. Inserting a layer of elastic or soft material at the interface where the two contact can fill the gap and absorb part of the clamping force during the tightening process, thereby preventing the hard protrusion from directly scratching or indenting the busbar surface. In addition, by selecting pads of different thicknesses, it is also possible to adapt to C-type busbars 4 of different specifications, thereby improving the applicability of the busbar frame in this utility model.

[0035] In one feasible embodiment, the first fixing plate 1 and the second fixing plate 2 are both made of insulating plastic or insulating ceramic. While the entire clamping structure mechanically fixes the busbar, it naturally forms a high-impedance isolation layer between the busbar and its supporting frame, preventing leakage current channels through the fixing components, ensuring personal safety and preventing phase-to-phase short circuits, and improving the electrical safety inside the distribution cabinet.

[0036] In addition to the above embodiments, based on the same inventive concept, this utility model also proposes a power distribution cabinet, which includes the busbar frame of the high-current power distribution cabinet mentioned above.

[0037] Compared with the prior art, the distribution cabinet of this utility model has all the advantages of the busbar frame of the aforementioned high-current distribution cabinet, which will not be elaborated here. Moreover, during installation inside the cabinet, the busbar frame, through its unique movable redundancy design, allows operators to easily fine-tune the final position of the C-type busbar 4, ensuring that the busbar side slot and the already positioned T-bolt 5 can be quickly and smoothly engaged. This significantly shortens the assembly and wiring time of the distribution cabinet, thereby improving production efficiency and facilitating later maintenance and replacement. It also helps to solve the technical problem of existing distribution cabinets where the busbar needs to be inserted into the busbar frame from the side to avoid the T-bolt 5.

[0038] In one feasible embodiment, the distribution cabinet also includes a T-bolt 5 and a copper busbar 6. The nut of the T-bolt 5 is engaged with the C-type busbar 4, and the T-bolt 5 is bolted to the copper busbar 6. In this embodiment, the head of the T-bolt 5 is inserted into the groove of the C-type busbar 4, and the screw part passes through the hole on the copper busbar 6 and is locked with a nut. This forms a solid connection point that is easy to install and position and can withstand the thermal stress and electric force generated by the large current. This ensures the efficient and stable transmission of electrical energy from the busbar to the branch copper busbar 6, reduces the contact resistance and temperature rise of the connection point, and solves the technical problem of overheating damage to the connection point due to poor contact in the high current circuit.

[0039] In one feasible embodiment, multiple copper busbars 6 are arranged at intervals along the length of the C-shaped busbar 4. The multiple copper busbars 6 are distributed and installed at a certain interval along the length of the C-shaped busbar 4. Each copper busbar 6 is electrically connected to the busbar by an independent T-bolt 5, which can distribute the total current to multiple connection points, thereby achieving uniform distribution of current load and providing redundant connection paths, improving the system current carrying capacity and power supply reliability.

[0040] In summary, the busbar frame and distribution cabinet of this high-current distribution cabinet, by opening a second through slot 21 with increased width at the top of the first fixing plate 1, provide crucial horizontal redundancy for the installation of the C-type busbar 4, allowing for fine-tuning before final tightening. This cleverly solves the alignment problem of quickly and accurately engaging the C-type busbar 4 with the T-bolts 5 inside the cabinet, significantly improving installation efficiency. Furthermore, by introducing a third fixing plate 3 and employing a multi-layered fixing plate stacking design, a stable three-dimensional clamping space is formed together with the first and second fixing plates. Through-bolts connect these plates into a rigid overall frame, enhancing mechanical stability. Simultaneously, the fixing plates are made of insulating plastic or ceramic material and equipped with pads, providing reliable electrical isolation while achieving mechanical fixation, protecting the busbar surface, eliminating the risk of leakage and short circuits, and fundamentally improving safety. In addition, the structure supports the T-bolts 5 to be firmly connected to multiple copper busbars 6 arranged in a distributed manner along the length of the busbar, realizing the uniform distribution of current load and redundancy backup, ensuring the stability and efficiency of power transmission, and comprehensively solving a series of technical bottlenecks of traditional distribution cabinets in terms of busbar installation, fixing stability, electrical safety and current carrying capacity.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A busbar frame for a high-current distribution cabinet, characterized in that, include: The first fixing plate (1) is perpendicular to the length direction of the C-type busbar (4). The bottom of the first fixing plate (1) is provided with a first through groove (11) for accommodating the C-type busbar (4), and a first limiting protrusion (13) is provided in the first through groove (11). The first limiting protrusion (13) is connected to the first fixing plate (1) and is located on one side of the C-type busbar (4). The second fixing plate (2) is arranged side by side below the first fixing plate (1) to clamp the C-shaped busbar (4). The top of the first fixing plate (1) is provided with a second through groove (21). The width of the second through groove (21) is greater than the width of the C-shaped busbar to form a movable redundancy of the C-shaped busbar (4). The first limiting protrusion (13) and the C-shaped busbar (4) are both engaged in the two through grooves.

2. The busbar frame of the high-current distribution cabinet as described in claim 1, characterized in that, The busbar frame of the high current distribution cabinet also includes a third fixing plate (3). The third fixing plate (3) is arranged side by side above the first fixing plate (1) to clamp the C-shaped busbar (4). The top of the first fixing plate (1) is provided with a third through groove (12), and the bottom of the third fixing plate (3) is provided with a fourth through groove (31). The fourth through groove (31) and the third through groove (12) are arranged vertically to form a clamping space for the C-shaped busbar (4). The fourth through groove (31) is provided with a second limiting protrusion (32). The second limiting protrusion (32) is connected to the third fixing plate (3). The second limiting protrusion (32) is located on one side of the C-shaped busbar (4).

3. The busbar frame of the high-current distribution cabinet as described in claim 2, characterized in that, The first fixing plate (1) consists of multiple plates stacked in the vertical direction, and the third through slot (12) located below and the first through slot (11) located above form a clamping space for the C-shaped busbar (4).

4. The busbar frame of the high-current distribution cabinet as described in claim 3, characterized in that, The busbar frame of the high current distribution cabinet also includes fixing bolts, which penetrate the third fixing plate (3), the first fixing plate (1) and the second fixing plate (2) in the vertical direction.

5. The busbar frame of the high-current distribution cabinet as described in claim 1, characterized in that, The busbar frame of the high current distribution cabinet also includes a pad, which is located on the side of the first limiting protrusion (13) facing the C-type busbar.

6. The busbar frame of the high-current distribution cabinet as described in claim 5, characterized in that, The first fixing plate (1) and the second fixing plate (2) are both made of insulating plastic or insulating ceramic.

7. A power distribution cabinet, characterized in that, Includes the busbar frame of the high-current distribution cabinet as described in any one of claims 1 to 6.

8. The power distribution cabinet as described in claim 7, characterized in that, The distribution cabinet also includes T-bolts (5) and copper busbars (6). The nuts of the T-bolts (5) are snapped onto the C-type busbars (4), and the T-bolts (5) are bolted to the copper busbars (6).

9. The power distribution cabinet as described in claim 8, characterized in that, The copper busbars (6) are multiple ones arranged at intervals along the length of the C-shaped busbar (4).

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