High-efficiency heat dissipation bus duct with waterproof function

Abstract

The application relates to the technical field of bus ducts and discloses a high-efficiency heat-dissipation bus duct with a waterproof function, which comprises upper and lower cover plates and a conductive row arranged vertically between the upper and lower cover plates, the conductive row is arranged in groups and symmetrically, and a heat-dissipation cavity is formed between the two groups of conductive rows; a convection heat-dissipation hole communicated with the heat-dissipation cavity is formed in each of the upper and lower cover plates, and the convection heat-dissipation hole and the heat-dissipation cavity form an air convection air duct for convection heat dissipation of the conductive row. According to the application, the conductive row is arranged in groups and separated, and the convection heat-dissipation hole is used to form a convection heat-dissipation cavity for the inner cavity of the bus duct, so that the high-efficiency heat-dissipation performance of the bus duct is guaranteed; the sealing strip and the water-repellent convex part are arranged, so that the water in the heat-dissipation cavity is prevented from flowing to the gap between the conductive row, the inner heat-dissipation plate and the cover plate under the premise of guaranteeing the sealing performance of the conductive row, and the waterproof performance of the whole bus duct is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bus duct, in particular to a high-efficiency heat dissipation bus duct with waterproof function. BACKGROUND

[0002] With the emergence of modern engineering facilities and equipment, the power consumption of various industries has increased rapidly, especially the emergence of numerous high-rise buildings and large workshops. The traditional cable as a power transmission conductor cannot meet the requirements in high-current transmission systems. The use of multiple parallel cables brings many inconveniences to the installation and construction connection. As a new type of power distribution conductor, the plug-in bus duct is born. Compared with the traditional cable, it fully embodies its superiority in high-current transmission. At the same time, due to the use of new technology and new process, the contact resistance and temperature rise at the connection of the two ends of the bus duct and the plug-in port are greatly reduced, and high-quality insulation materials are used in the bus duct, thereby improving the safety and reliability of the bus duct and making the entire system more perfect.

[0003] For the existing structure of the intensive bus duct, the conductive rows arranged in each other are mostly in a closed installation layout. After a long time of use, the bus duct generates a large amount of heat in the working process. At the same time, the conductive rows are arranged closely, and a large amount of heat is gathered in the bus duct during the conduction process, which causes the internal temperature of the bus duct to be too high. If not handled in time, accidents may occur, which is easy to cause damage to the internal electrical components, reduce the service life of the bus duct, and the defect of the heat dissipation performance also causes it to be unable to realize long-time high-power operation. For the waterproof performance and heat dissipation performance of the bus duct, the existing technology is difficult to balance, which seriously affects the overall service life and application risk of the bus duct. SUMMARY

[0004] In view of the shortcomings of the prior art, the present application provides a high-efficiency heat dissipation bus duct with waterproof function, which solves the problem that the waterproof performance and heat dissipation performance of the existing bus duct are difficult to balance, the service life of the internal electrical components is short, and the daily operation and maintenance cost is high.

[0005] To achieve the above purpose, the following technical solutions are used:

[0006] A high-efficiency heat dissipation bus duct with waterproof function, comprising upper and lower cover plates and conductive rows vertically arranged between the upper and lower cover plates, the conductive rows are arranged in groups and symmetrically, and a heat dissipation cavity is formed between the two groups of conductive rows.

[0007] The upper and lower cover plates are respectively provided with a convection heat dissipation hole communicating with the heat dissipation cavity, and the convection heat dissipation hole and the heat dissipation cavity form an air convection air duct for convection heat dissipation of the conductive rows.

[0008] Preferably, inner heat dissipation plates and outer heat dissipation plates are arranged on the two sides of each group of the conductive rows respectively, and the inner and outer heat dissipation plates fix the conductive rows between the upper and lower cover plates.

[0009] Preferably, a plurality of equidistant protrusions, continuous serrations or continuous smooth protrusions are arranged on the inner and outer heat dissipation plates.

[0010] Preferably, sealing strips are arranged on the upper and lower ends of the conductive rows, the sealing strips are clamped and fixed by the inner and outer heat dissipation plates respectively, and one end away from the conductive rows abuts against the cover plate.

[0011] Preferably, the inner heat dissipation plate is in a straight plate type, and the cover plate vertically extends inward to form a pair of fixing feet to fix the inner heat dissipation plates from both ends.

[0012] Preferably, the fixing feet abut against the sealing strips at the junctions with the cover plate, and the front end portions are provided with embedding grooves for the end portions of the inner heat dissipation plates to be embedded.

[0013] Preferably, the end portions of the inner heat dissipation plates are located at the junctions of the sealing strips and the conductive rows.

[0014] Preferably, the inner heat dissipation plate is provided with a hydrophobic boss close to the end portion, and the hydrophobic boss is inclined towards the fixing feet, and the end portion of the hydrophobic boss extends out of the fixing feet.

[0015] Preferably, the outer heat dissipation plate is in a U type, the middle segment is attached to the conductive rows, the edge segments perpendicular to the middle segment are attached to and fixed with the upper and lower cover plates respectively, and the cover plate is provided with waterproof corrugations towards the edge segments of the outer heat dissipation plate.

[0016] Preferably, the two groups of inner heat dissipation plates are oppositely provided with PE row fixing structures.

[0017] The application has the following beneficial effects:

[0018] 1. By grouping the conductive rows, the heat accumulation problem caused by the aggregation of all conductive rows in the traditional bus duct can be effectively reduced; the heat dissipation cavities are formed between the two groups of conductive rows, and the heat generated by the conductive rows can be dissipated to the external environment in time through the convection heat dissipation holes arranged on the cover plate.

[0019] 2. By enclosing the conductive rows in the cavity formed by the cover plate, the outer heat dissipation plate and the inner heat dissipation plate, and sealing the conductive rows by the sealing strips, the waterproof performance of the bus duct can be effectively guaranteed.

[0020] 3. By arranging the hydrophobic boss on the inner heat dissipation plate, when water droplets flow through the convection heat dissipation holes on the cover plate and the heat dissipation cavity, the hydrophobic boss can prevent the water droplets from accumulating between the inner heat dissipation plate and the cover plate, so that the water droplets directly flow out from the convection heat dissipation holes on the lower cover plate, and the waterproof performance of the entire bus duct is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Fig. 1 is a schematic diagram of the bus duct structure of the present application;

[0022] Figure 2 Fig. 2 is a schematic diagram of the bus duct assembly profile of the present application;

[0023] Figure 3 Fig. 3 is a schematic diagram of the cover plate structure of the present application;

[0024] Figure 4 Fig. 4 is a schematic diagram of the different shape heat dissipation structure of the present application;

[0025] Figure 5 Fig. 5 is a schematic diagram of the outer heat dissipation plate structure of the present application;

[0026] Figure 6 Fig. 6 is a schematic diagram of the different shape convection heat dissipation hole layout of the present application;

[0027] Figure 7 Fig. 7 is a schematic diagram of the certain shape convection heat dissipation hole layout of the present application which are in communication with each other;

[0028] Figure 8 Fig. 8 is a schematic diagram of the direct heat dissipation surface layout of the common dense bus duct.

[0029] In the figure: 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 row fixing structure; 32, hydrophobic boss; 4, conductive row; 5, heat dissipation cavity; 6, heat dissipation structure; 7, sealing strip. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] A high-efficiency heat dissipation bus duct with waterproof function, as shown in Figure 1 includes upper and lower cover plates 1 and conductive rows 4 vertically arranged between the upper and lower cover plates 1. The conductive rows 4 are arranged in groups and symmetrically, and the heat dissipation cavities 5 are formed between the two groups of conductive rows 4. The upper and lower cover plates 1 are respectively provided with convection heat dissipation holes 11 which are in communication with the heat dissipation cavities 5, and the convection heat dissipation holes 11 and the heat dissipation cavities 5 form an air convection air duct for convection heat dissipation of the conductive rows 4.

[0032] The conductive rows are usually four, corresponding to the four lines in the three-phase four-wire, i.e. three live wires L1, L2, L3 and one neutral wire N. Therefore, referring to Figure 2, four conductive rows are divided into two groups, and each group has two conductive rows. The four conductive rows of the traditional dense bus duct are arranged at one place, and the outer side of the conductive row is wrapped with an organic insulating material (such as epoxy resin, cross-linked polyethylene), see Figure 8 The dense bus duct mainly dissipates heat through the aluminum shell, and the direct heat dissipation surface is mainly the contact surface with the two side heat dissipation aluminum shells.

[0033] The application breaks the traditional dense bus duct conductive row arrangement thinking, and divides the conductive row into two groups, which doubles the direct heat dissipation surface of the conductive row. At the same time, through the arrangement of the convection heat dissipation hole, the conductive row can also take away part of the heat while dissipating heat through the aluminum shell, thereby further improving the heat dissipation efficiency of the conductive row.

[0034] Although the traditional air type bus duct also involves air cooling, the simple air cooling has gaps (usually ≥12mm) between the conductive rows, and the insulation between the conductive rows mainly relies on air, which has the problems of occupying more space, not suitable for space limited scenes; easily affected by the environment, humidity, dust and corrosive gas will reduce the insulation performance; low safety; bare conductors may cause electric shock risk, additional protection measures are required and other problems. The bus duct provided by the application considers the heat dissipation performance while ensuring the sealing performance of the conductive row, and provides a non-traditional bus duct with high protection level, outstanding heat dissipation performance and insulation performance.

[0035] Referring to Figure 8 The traditional dense bus duct mainly dissipates heat through the aluminum shell on both sides of the conductive row, and each group of conductive row 4 in the embodiment is also provided with inner heat dissipation plate 3 and outer heat dissipation plate 2 on the inner and outer sides, and the inner and outer heat dissipation plates 2 fix the conductive row 4 between the upper and lower cover plates 1.

[0036] Consistent with the traditional dense bus duct, the outer heat dissipation plate 2 is U-shaped, the middle section is attached to the conductive row 4, and the edge section perpendicular to the middle section is attached to and fixed with the upper and lower cover plates 1. The cover plate 1 is provided with a waterproof corrugation 12 towards the edge section of the outer heat dissipation plate 2. The design of the waterproof corrugation (also called waterproof expansion joint) is to cope with the relative displacement caused by material thermal expansion and contraction, vibration and the like, while ensuring the sealing and waterproof performance of the bus duct, so that it can still work normally in a humid environment.

[0037] The waterproof corrugation usually adopts a multi-layer protection structure to ensure effective waterproofing during expansion and deformation, which specifically includes:

[0038] 1. Outer waterproof layer: made of weather-resistant rubber or silicone material, with elasticity, anti-aging, high and low temperature resistance. The surface can be designed with a water guide groove to prevent water penetration;

[0039] 2. Inner sealing layer: built-in EPDM sealing strip or polyurethane foam material, filling the gap to block the intrusion of water vapor;

[0040] 3. Metal bellow support layer: stainless steel bellow (such as 304 / 316 material) provides mechanical strength while allowing axial / lateral displacement.

[0041] In this embodiment, the length of the waterproof bellow 12 that interferes with the outer heat sink 2 is not less than half of the maximum width of the outer heat sink, so as to reasonably arrange the protection structure of each layer of the waterproof bellow 12.

[0042] In order to enhance the heat dissipation performance of the inner and outer heat sinks, a plurality of equidistant protrusions, continuous serrations or continuous smooth protrusions are arranged on the inner heat sink 3 and the outer heat sink 2 in this embodiment, thereby increasing the heat dissipation area and improving the heat dissipation effect of the heat sink on the conductive row. At the same time, referring to Figure 4 and 5 , by setting various heat dissipation protrusions, the processing cost and heat dissipation performance of the heat sink can be balanced, and the actual application requirements can be selected.

[0043] Figure 1 The convection cooling hole shown in Figure 6 is a long waist hole, but other various shapes such as a circular hole, a polygonal hole or any one of other special-shaped holes can also be used, and simulation can be combined with the use environment to plan the shape of the convection cooling hole matching the use environment. Of course, the two convection cooling holes 11 are in communication with each other, and referring to Figure 7 , the air convection exchange of the heat dissipation cavity is further improved, and the heat exchange efficiency is improved.

[0044] In order to improve the sealing performance of the conductive row, a sealing strip 7 is arranged on the upper and lower ends of the conductive row 4 in this embodiment, the two sides of the sealing strip 7 are clamped and fixed by the inner and outer heat sinks 2, and the end away from the conductive row 4 abuts against the cover plate 1. Conventionally, the mainstream materials of the sealing strip are ethylene propylene diene rubber (EPDM), silicone, chloroprene rubber (CR) and polyvinyl chloride (PVC). The sealing strip is arranged on the basis of the waterproof bellow, and has increased a waterproof guarantee.

[0045] Referring to Figure 8 , in the traditional installation process of the conductive row, a heat sink with uniform shape is usually used to extrude and install the conductive row. In this installation mode, the heat sinks on both sides of the conductive row need to be fixed independently, and the installation steps are complicated and low in efficiency.

[0046] The specific structure of the outer heat sink is described above, and the specific structure of the inner heat sink can refer to the outer heat sink, but considering the space for arranging the convection cooling hole, the inner heat sink 3 is in the form of a straight plate in this embodiment, and the cover plate 1 vertically extends a pair of fixing feet 13 to fix the inner heat sink 3 from both ends, as shown in Figure 2 , Figure 3 .

[0047] In the assembling, the two ends of the inner heat dissipation plate are first abutted against the two fixing feet, then the conductive row and the sealing strip are positioned, and finally the outer heat dissipation plate is used for pressing, so that the whole operation process is relatively simple and convenient, and the installation efficiency can be ensured. The fixing foot 13 realizes the extrusion and fixing of the straight plate type inner heat dissipation plate 3 from the inner side, and the structure is simple and the cost is relatively low; under the limited size limitation, the fixing of the inner heat dissipation plate avoids the interference with the arrangement of the convection heat dissipation hole 11 on the cover plate.

[0048] As a better selection, the front end part of the fixing foot 13 is provided with an embedding groove for the end part of the inner heat dissipation plate 3 to be embedded, and the fixing foot 13 is tightly abutted against the sealing strip 7 at the joint with the cover plate 1, as shown in Figure 2 . In the first aspect, the fixing foot and the outer heat dissipation plate clamp the sealing strip, so that the sealing performance is ensured; in the second aspect, the end part of the inner heat dissipation plate is embedded in the embedding groove of the front end part of the fixing foot 13, so that the fixing of the inner heat dissipation plate is more stable, the stability of the whole structure is improved, and meanwhile, the positioning of the inner heat dissipation plate is facilitated, the assembly time is effectively reduced, and the assembly efficiency is improved.

[0049] As a better selection, the end part of the inner heat dissipation plate 3 is located at the joint of the sealing strip 7 and the conductive row 4. The extrusion of the fixing foot on the end part of the inner heat dissipation plate can be conducted to the joint of the sealing strip and the conductive row, so that the joint structure between the sealing strip and the conductive row is more stable.

[0050] In order to prevent water droplets from flowing into the gap between the fixing foot and the end part of the inner heat dissipation plate, the inner heat dissipation plate 3 is provided with a hydrophobic boss 32 close to the end part thereof, the hydrophobic boss 32 is inclined towards the fixing foot 13, and the end part thereof protrudes out of the fixing foot 13. When water droplets flow in from the upper convection heat dissipation hole, the water droplets can flow away through the lower convection heat dissipation hole. Even if part of the water droplets falls on the inner heat dissipation plate, the water droplets can only fall along the heat dissipation plate to the hydrophobic boss 32 and then fall along the hydrophobic boss 32, and cannot penetrate into the gap between the fixing foot and the end part of the inner heat dissipation plate, so that the waterproof effect is further achieved. In addition, the inner heat dissipation plate is provided with the hydrophobic boss 32 close to the two fixing feet, so that the waterproof effect of the hydrophobic boss is achieved regardless of which side of the cover plate of the bus duct is installed upwards.

[0051] It is mentioned above that the three-phase four-wire system is used, and for the three-phase five-wire system, one grounding row, i.e. the PE row, needs to be additionally arranged. The bus duct of the present application is provided with a PE row fixing structure 31 opposite to the two groups of inner heat dissipation plates 3, as shown in Figure 2 , so that the protective grounding PE row can be quickly and conveniently positioned and installed, and the assembly efficiency is improved.

[0052] It should be noted that the upper and lower in the present application are referred to the directions shown in the bus duct in Figure 1 , Figure 2 . When the bus duct is installed as shown in Figure 8As shown in the installation, the upper and lower in the present application are changed into left and right, for example, the relative position of the upper and lower cover plates is no longer upper and lower, but left and right. Similarly, the definition of vertical and horizontal direction changes synchronously with the installation mode of the whole bus duct. At the same time, the terms "include", "contain" or any other variants are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. Without more limitations. The statement "including a limited element" does not exclude the existence of other identical elements in the process, method, article or equipment including the element.

[0053] Although embodiments of the present application have been shown and described, it will be understood by those having ordinary skill in the art that various changes, modifications, alternatives and variations can be made thereto without departing from the principles and spirit of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency heat-dissipation bus duct with waterproof function, comprising upper and lower cover plates and a conductive row arranged vertically between the upper and lower cover plates, characterized in that: The conductive rows are symmetrically arranged in groups, and the heat dissipation cavities are formed between the two groups of conductive rows; The upper and lower cover plates are respectively provided with the convection heat dissipation holes communicated with the heat dissipation cavities, and the convection heat dissipation holes and the heat dissipation cavities form the air convection air ducts for the conductive rows; The inner and outer heat dissipation plates are respectively arranged on the inner and outer sides of each group of conductive rows, the inner and outer heat dissipation plates fix the conductive rows between the upper and lower cover plates, the upper and lower ends of the conductive rows are provided with the sealing strips, the sealing strips are clamped and fixed by the inner and outer heat dissipation plates, one end away from the conductive rows abuts against the cover plate, the inner heat dissipation plate is in the form of a straight plate, the cover plate vertically extends inwardly to form a pair of fixing feet to fix the inner heat dissipation plates from both ends, the fixing feet abut against the sealing strips at the joint with the cover plate, and the front end of the fixing feet is provided with the embedding groove for the end portion of the inner heat dissipation plate to be embedded; The inner heat dissipation plate is provided with the hydrophobic boss close to the end portion, and the hydrophobic boss is inclined towards the fixing feet, and the end portion of the hydrophobic boss extends out of the fixing feet.

2. The high-efficiency bus duct with waterproof function according to claim 1, characterized in that: The inner and outer heat dissipation plates are respectively provided with a plurality of equal-interval protrusions, continuous sawteeth or continuous smooth protrusions.

3. The high-efficiency bus duct with waterproof function according to claim 1, characterized in that: The end portion of the inner heat dissipation plate is located at the joint of the sealing strip and the conductive row.

4. The high-efficiency bus duct with waterproof function according to claim 1, characterized in that: The outer heat dissipation plate is in the form of a U-shaped plate, the middle segment of the U-shaped plate abuts against the conductive row, the edge segments perpendicular to the middle segment abut against and are fixed to the upper and lower cover plates, and the cover plate is provided with the waterproof corrugation towards the edge segments of the outer heat dissipation plate.

5. The high-efficiency bus duct with waterproof function according to claim 1, characterized in that: The two groups of inner heat dissipation plates are oppositely provided with the PE row fixing structure.

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