Efficient heat dissipation bus duct with waterproof function

Abstract

The invention relates to the technical field of bus ducts, and discloses an efficient heat dissipation bus duct with a waterproof function, which comprises an upper cover plate, a lower cover plate and conducting bars vertically arranged between the upper cover plate and the lower cover plate, the conducting bars are symmetrically arranged in groups, and a heat dissipation cavity is formed between the two groups of conducting bars; the upper cover plate and the lower cover plate are respectively provided with convection heat dissipation holes communicated with the heat dissipation cavity, and the convection heat dissipation holes and the heat dissipation cavity form an air convection air channel which is used for conducting convection heat dissipation on the conducting bar. According to the invention, the conductive bars are arranged at intervals to cooperate with the convection heat dissipation holes to form the convection heat dissipation cavity for the inner cavity of the bus duct, so that the efficient heat dissipation performance of the bus duct is ensured; through arrangement of the sealing strips and the hydrophobic protrusions, on the premise that the sealing performance of the conducting bar is guaranteed, water flow in the heat dissipation cavity can be prevented from flowing to gaps among the conducting bar, the inner heat dissipation plate and the cover plate, and the waterproof performance of the whole bus duct is improved.

Description

Technical Field

[0001] This invention relates to the field of busbar technology, specifically to a high-efficiency heat dissipation busbar with waterproof function. Background Technology

[0002] With the emergence of modern engineering facilities and equipment, electricity consumption in all industries has increased rapidly, especially with the appearance of numerous high-rise buildings and large factory workshops. Traditional cables, as power transmission conductors, can no longer meet the requirements of high-current transmission systems. The parallel use of multiple cables has brought many inconveniences to on-site installation and construction. Plug-in busbar trunking, as a new type of power distribution conductor, has emerged. Compared with traditional cables, it fully demonstrates its superiority in high-current transmission. At the same time, due to the adoption of new technologies and processes, the contact resistance and temperature rise at the connection points at both ends of the busbar trunking and the plug-in points of the branch ports are greatly reduced. High-quality insulation materials are used in the busbar trunking, thereby improving the safety and reliability of the busbar trunking and making the entire system more complete.

[0003] For existing high-density busbar trunking structures, the conductive bars arranged insulated from each other mostly adopt a closed installation layout. After prolonged use, busbar trunking generates a significant amount of heat during operation. Simultaneously, the close arrangement of the conductive bars causes a large amount of heat to accumulate inside the busbar trunking during conduction, leading to excessively high internal temperatures. If not addressed promptly, this can potentially cause accidents, damage internal electrical components, reduce the lifespan of the busbar trunking, and prevent it from operating at high power for extended periods due to inadequate heat dissipation. Current technologies struggle to simultaneously achieve both waterproofing and heat dissipation performance in busbar trunking, severely impacting its overall lifespan and increasing application risks. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a high-efficiency heat dissipation busbar trunking with waterproof function, which solves the problems of existing busbar trunking having difficulty in achieving both waterproof and heat dissipation performance, short service life of internal electrical components, and high daily operation and maintenance costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A high-efficiency heat dissipation busbar trunking with waterproof function includes upper and lower cover plates and conductive bars arranged vertically between the upper and lower cover plates. The conductive bars are arranged in groups symmetrically, and a heat dissipation cavity is formed between two groups of conductive bars. The upper and lower cover plates are respectively provided with convection heat dissipation holes that communicate with the heat dissipation cavity. The convection heat dissipation holes and the heat dissipation cavity form an air convection channel for heat dissipation of the busbar.

[0006] Preferably, each set of conductive bars is provided with an inner heat dissipation plate and an outer heat dissipation plate on its inner and outer sides, respectively, and the inner and outer heat dissipation plates fix the conductive bars between the upper and lower cover plates.

[0007] Preferably, both the inner and outer heat dissipation plates are provided with multiple equally spaced protrusions, continuous serrations, or continuous smooth protrusions.

[0008] Preferably, the upper and lower ends of the conductive bar are provided with sealing strips, and the two sides of the sealing strips are clamped and fixed by the inner and outer heat dissipation plates respectively, with the end away from the conductive bar abutting against the cover plate.

[0009] Preferably, the inner heat dissipation plate is a straight plate, and the cover plate extends vertically inward with a pair of fixing feet to fix the inner heat dissipation plate from both ends.

[0010] Preferably, the fixing foot is in close contact with the sealing strip at the connection point with the cover plate, and the front end is provided with an embedding groove for the end of the inner heat dissipation plate to be embedded.

[0011] Preferably, the end of the inner heat dissipation plate is located at the junction of the sealing strip and the conductive bar.

[0012] Preferably, the inner heat sink is provided with a hydrophobic protrusion near its end, the hydrophobic protrusion is inclined toward the fixing foot, and its end extends out of the fixing foot.

[0013] Preferably, the outer heat dissipation plate is U-shaped, with the middle section attached to the conductive bar, and the side sections perpendicular to the middle section attached to and fixed to the upper and lower cover plates respectively. The cover plates are provided with waterproof ripples on the side sections facing the outer heat dissipation plate.

[0014] Preferably, the two sets of internal heat dissipation plates are provided with PE busbar fixing structures.

[0015] The present invention has the following beneficial effects: 1. By grouping the conductive strips, the heat accumulation problem caused by all conductive strips gathering together in traditional busbar trunking can be effectively reduced; a heat dissipation cavity is formed between the two groups of conductive strips, and the convection heat dissipation holes arranged on the cover plate also enable the heat generated by the conductive strips to be dissipated to the external environment in a timely manner.

[0016] 2. By enclosing the conductive busbars within the cavity formed by the cover plate, outer heat dissipation plate, and inner heat dissipation plate, and simultaneously sealing the conductive busbars with sealing strips, the waterproof performance of the busbar trunking can be effectively guaranteed.

[0017] 3. Drain-repellent protrusions are arranged on the inner heat dissipation plate. When water droplets flow through the convection heat dissipation holes on the cover plate and in the heat dissipation cavity, the drainage protrusions can prevent water droplets from accumulating between the inner heat dissipation plate and the cover plate, so that the water droplets flow directly out from the convection heat dissipation holes on the lower cover plate, further improving the waterproof performance of the entire busbar trunking. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the busbar structure of the present invention; Figure 2 This is a schematic cross-sectional view of the busbar trunking assembly of the present invention; Figure 3 This is a schematic diagram of the cover plate structure of the present invention; Figure 4 These are schematic diagrams of heat dissipation structures of different shapes according to the present invention; Figure 5 This is a schematic diagram of the external heat sink structure of the present invention; Figure 6 This is a schematic diagram of the convection heat dissipation hole layout of different shapes according to the present invention; Figure 7 This is a schematic diagram of the layout of convection heat dissipation holes of a certain shape that are interconnected with each other according to the present invention; Figure 8 This is a schematic diagram of the direct heat dissipation surface layout of a common dense busbar trunking.

[0019] In the diagram: 1. Cover plate; 11. Convection heat dissipation hole; 12. Waterproof corrugation; 13. Fixing foot; 2. Outer heat dissipation plate; 3. Inner heat dissipation plate; 31. PE drain fixing structure; 32. Hydrophobic boss; 4. Conductive busbar; 5. Heat dissipation cavity; 6. Heat dissipation structure; 7. Sealing strip. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] A high-efficiency heat dissipation busbar with waterproof function, such as Figure 1 As shown, the device includes upper and lower cover plates 1 and conductive bars 4 arranged vertically between the upper and lower cover plates 1. The conductive bars 4 are arranged symmetrically in groups, and a heat dissipation cavity 5 is formed between two groups of conductive bars 4. Convection heat dissipation holes 11 are respectively opened on the upper and lower cover plates 1, which communicate with the heat dissipation cavity 5. The convection heat dissipation holes 11 and the heat dissipation cavity 5 form an air convection channel for convective heat dissipation of the conductive bars 4.

[0022] There are usually four conductor bars, corresponding to the four wires in a three-phase four-wire system: three live wires L1, L2, and L3, and one neutral wire N. Therefore, see... Figure 2 The four conductive bars are divided into two groups, with two conductive bars in each group. In contrast, traditional high-density busbar trunking has four conductive bars located in one place, with the outer surface of the conductive bars wrapped in organic insulating material (such as epoxy resin or cross-linked polyethylene). See [link to relevant documentation]. Figure 8The dense busbar trunking mainly dissipates heat through its aluminum casing, and the direct heat dissipation surface is mainly the contact surface with the heat dissipation aluminum casing on both sides.

[0023] This invention breaks away from the traditional approach to conductor bar layout in dense busbar trunking, dividing the conductor bars into two groups, thus significantly increasing the direct heat dissipation surface area of ​​the conductor bars. Simultaneously, through the arrangement of convection ventilation holes, the conductor bars dissipate heat through the aluminum casing, while airflow also carries away some heat, further improving the heat dissipation efficiency of the conductor bars.

[0024] Traditional air-cooled busbar trunking, while involving air cooling, relies solely on air for heat dissipation. This results in gaps (typically ≥12mm) between conductors, with insulation primarily dependent on air. This leads to issues such as large space requirements, unsuitability for space-constrained environments, susceptibility to environmental factors like humidity, dust, and corrosive gases reducing insulation performance, lower safety, and the risk of electric shock from exposed conductors requiring additional protective measures. In contrast, the busbar trunking proposed in this invention balances conductor sealing performance with excellent heat dissipation, providing a non-traditional busbar trunking with high protection levels and outstanding heat dissipation and insulation properties.

[0025] See Figure 8 Traditional high-density busbar trunking mainly dissipates heat through the aluminum shells on both sides of the conductive busbars. In this embodiment, each conductive busbar 4 is also provided with an inner heat dissipation plate 3 and an outer heat dissipation plate 2 on its inner and outer sides, respectively. The inner and outer heat dissipation plates 2 fix the conductive busbar 4 between the upper and lower cover plates 1.

[0026] Similar to traditional high-density busbar trunking, the outer heat dissipation plate 2 is U-shaped, with the middle section attached to the conductive busbar 4, and the side sections perpendicular to the middle section attached to and fixed to the upper and lower cover plates 1 respectively. The side section of the cover plate 1 facing the outer heat dissipation plate 2 is provided with waterproof corrugations 12. The design of the waterproof corrugations (also called waterproof expansion joints) is to cope with the relative displacement caused by thermal expansion and contraction of materials, vibration, etc., while ensuring the sealing and waterproof performance of the busbar trunking, ensuring that it can still work normally in humid environments.

[0027] Waterproof corrugations typically employ a multi-layered protective structure to ensure effective waterproofing even during expansion and contraction. Specifically, this includes: 1. Outer waterproof layer: Made of weather-resistant rubber or silicone material, possessing elasticity, aging resistance, and resistance to high and low temperatures. Water-guiding grooves can be designed on the surface to prevent water seepage. 2. Inner sealing layer: Built-in EPDM sealing strip or polyurethane foam material to fill gaps and prevent moisture intrusion; 3. Metal bellows support layer: Stainless steel bellows (such as 304 / 316 material) provides mechanical strength while allowing axial / lateral displacement.

[0028] In this embodiment, the length of the waterproof corrugation 12 that contacts the external heat dissipation plate 2 is not less than half the maximum width of the external heat dissipation plate, so as to reasonably configure the protective structure of each layer of the waterproof corrugation 12.

[0029] To enhance the heat dissipation performance of the inner and outer heat sinks, in this embodiment, multiple equally spaced protrusions, continuous serrations, or continuous smooth protrusions are arranged on both the inner heat sink 3 and the outer heat sink 2, thereby increasing the heat dissipation area and improving the heat dissipation effect of the heat sinks on the busbars. Meanwhile, referring to... Figure 4 and 5 As shown, by setting up a variety of heat dissipation protrusions, the processing cost and heat dissipation performance of the heat sink can be balanced, and the appropriate protrusion can be selected according to the actual application requirements.

[0030] Figure 1 The convection cooling holes shown are elongated, but various other shapes are also used, such as... Figure 6 Any of the circular holes, polygonal holes, or other irregularly shaped holes shown can be simulated in conjunction with the usage environment to plan the shape of the convection cooling holes that matches the usage environment. Of course, the convection cooling holes 11 are interconnected, as shown in the figure. Figure 7 This further enhances the air convection exchange in the heat dissipation cavity and improves heat exchange efficiency.

[0031] To improve the sealing performance of the conductive busbar, this embodiment provides sealing strips 7 at both the upper and lower ends of the conductive busbar 4. The sealing strips 7 are clamped and fixed on both sides by inner and outer heat dissipation plates 2, with the end furthest from the conductive busbar 4 abutting against the cover plate 1. Conventionally, the mainstream materials for sealing strips include ethylene propylene diene monomer (EPDM), silicone, neoprene rubber (CR), and polyvinyl chloride (PVC). The sealing strips provide an additional layer of waterproof protection on top of the existing waterproof corrugations.

[0032] Reference Figure 8 As shown, in the traditional installation process of conductive busbars, a heat sink of uniform shape is usually used to press and install the conductive busbar. This installation method requires the heat sink on both sides of the conductive busbar to be fixed independently, which is cumbersome and inefficient.

[0033] The specific structure of the external heat sink has been described above. The specific structure of the internal heat sink can be referenced from that of the external heat sink. However, to ensure sufficient space for the convection ventilation holes, in this embodiment, the internal heat sink 3 is a straight plate. A pair of fixing feet 13 extend vertically inward from the cover plate 1, fixing the internal heat sink 3 from both ends. (Refer to...) Figure 2 , Figure 3 As shown.

[0034] During assembly, the inner heat sink can be first placed against the two fixing feet, then the conductive busbar and sealing strip can be positioned, and finally the outer heat sink can be used for pressing. The whole operation process is relatively simple and convenient, ensuring installation efficiency. The fixing feet 13 achieve compression and fixation of the straight inner heat sink 3 from the inside, which is simple in structure and low in cost; under the limited size constraints, the fixing of the inner heat sink avoids interference with the arrangement of the convection and heat dissipation holes 11 on the cover plate.

[0035] As a better option, in this embodiment, the front end of the fixing foot 13 is provided with an embedding groove for the end of the inner heat dissipation plate 3 to be inserted, and the fixing foot 13 is tightly attached to the sealing strip 7 at the connection between it and the cover plate 1. See Figure 2 Firstly, the fixing feet and the outer heat sink plate clamp the sealing strip, ensuring its sealing performance. Secondly, the end of the inner heat sink plate is embedded in the groove at the front end of the fixing feet 13, which makes the fixing of the inner heat sink plate more stable, improves the stability of the overall structure, and also facilitates the positioning of the inner heat sink plate, effectively reducing assembly time and improving assembly efficiency.

[0036] As a better option, the end of the inner heat sink 3 is located at the junction of the sealing strip 7 and the conductive busbar 4. The pressure exerted by the fixing feet on the end of the inner heat sink can be transmitted to the junction of the sealing strip and the conductive busbar, thereby making the connection structure between the sealing strip and the conductive busbar more stable.

[0037] To prevent water droplets from flowing into the gap between the fixing foot and the end of the inner heat sink plate, this embodiment provides a water-draining protrusion 32 near the end of the inner heat sink plate 3. The water-draining protrusion 32 is inclined towards the fixing foot 13, and its end extends out of the fixing foot 13. When water droplets flow in from the upper convection heat dissipation hole, they can flow away through the lower convection heat dissipation hole. Even if some water droplets fall on the inner heat sink plate, they can only drip down the heat sink plate onto the water-draining protrusion 32 and then down the water-draining protrusion 32, and cannot seep into the gap between the fixing foot and the end of the inner heat sink plate, thus further providing a waterproof effect. In addition, water-draining protrusions 32 are provided near both fixing feet of the inner heat sink plate, so that regardless of which side of the busbar trunking cover plate is installed facing upwards, the water-draining protrusions provide a waterproof effect.

[0038] The above text mentions a three-phase four-wire system. For a three-phase five-wire system, an additional grounding busbar, i.e., a PE busbar, is required. In this embodiment, a PE busbar fixing structure 31 is provided opposite to each other on the two sets of internal heat sinks 3. See [link / reference]. Figure 2 It can facilitate quick and easy installation and positioning of the protective grounding PE busbar, improving assembly efficiency.

[0039] It should be noted that "upper" and "lower" in this invention are references. Figure 1 , Figure 2 In terms of the direction shown by the busbar trunking, when the busbar trunking is like... Figure 8During the installation shown, the terms "up" and "down" in this invention are changed to "left" and "right." For example, the relative positions of the upper and lower cover plates are no longer "up" and "down," but "left" and "right." Similarly, the definition of the vertical and horizontal directions changes synchronously with the change in the installation method of the entire busbar trunking. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency heat dissipation busbar trunking with waterproof function, comprising upper and lower cover plates and conductive bars vertically arranged between the upper and lower cover plates, characterized in that: The conductive busbars are arranged symmetrically in groups, and a heat dissipation cavity is formed between two groups of conductive busbars; The upper and lower cover plates are respectively provided with convection heat dissipation holes that communicate with the heat dissipation cavity. The convection heat dissipation holes and the heat dissipation cavity form an air convection channel for heat dissipation of the busbar.

2. The high-efficiency heat dissipation busbar with waterproof function according to claim 1, characterized in that: Each set of conductive busbars is equipped with an inner heat dissipation plate and an outer heat dissipation plate on its inner and outer sides, respectively. The inner and outer heat dissipation plates fix the conductive busbars between the upper and lower cover plates.

3. The high-efficiency heat dissipation busbar with waterproof function according to claim 2, characterized in that: Both the inner and outer heat dissipation plates are equipped with multiple equally spaced protrusions, continuous serrations, or continuous smooth protrusions.

4. The high-efficiency heat dissipation busbar with waterproof function according to claim 2, characterized in that: The upper and lower ends of the conductive busbar are provided with sealing strips. The two sides of the sealing strips are clamped and fixed by the inner and outer heat dissipation plates respectively, and the end away from the conductive busbar abuts against the cover plate.

5. The high-efficiency heat dissipation busbar with waterproof function according to claim 4, characterized in that: The inner heat dissipation plate is in the shape of a straight plate, and the cover plate extends vertically inward with a pair of fixing feet to fix the inner heat dissipation plate from both ends.

6. The high-efficiency heat dissipation busbar with waterproof function according to claim 5, characterized in that: The fixing foot is tightly attached to the sealing strip at the connection with the cover plate, and the front end is provided with an embedding groove for the end of the inner heat dissipation plate to be embedded.

7. The high-efficiency heat dissipation busbar with waterproof function according to claim 6, characterized in that: The end of the inner heat dissipation plate is located at the junction of the sealing strip and the conductive bar.

8. The high-efficiency heat dissipation busbar with waterproof function according to any one of claims 2-7, characterized in that: The inner heat sink is provided with a hydrophobic protrusion near its end, the hydrophobic protrusion is inclined toward the fixing foot, and its end extends out of the fixing foot.

9. The high-efficiency heat dissipation busbar with waterproof function according to claim 2, characterized in that: The external heat dissipation plate is U-shaped, with the middle section attached to the conductive bar, and the side sections perpendicular to the middle section attached to and fixed to the upper and lower cover plates respectively. The cover plates have waterproof ripples on the side sections facing the external heat dissipation plate.

10. The high-efficiency heat dissipation busbar with waterproof function according to claim 2, characterized in that: The two sets of internal heat dissipation plates are fixed by PE strips.

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