Heat dissipation bus duct

Abstract

The utility model provides a heat dissipation bus duct, which relates to the technical field of power transmission equipment and comprises a duct body with an I-shaped cross section, and the duct body is integrally formed by an upper cover plate, a lower cover plate and a connecting body connected between the upper cover plate and the lower cover plate. A pair of side plates is installed between the upper cover plate and the lower cover plate. The two side plates and the left side wall and the right side wall of the connector form a left cavity and a right cavity in a surrounding mode, wherein the left cavity and the right cavity are used for containing an L1 phase conductor, an L2 phase conductor, an L3 phase conductor and an N phase conductor, the connecting body is provided with a heat dissipation groove penetrating in the length direction of a groove body and a plurality of convection channels penetrating in the width direction of the groove body, and the groove body is an external PE phase. One side of the conductor in the same group conducts heat to the side plate for heat dissipation, the other side of the conductor conducts heat to the heat dissipation groove to complete heat dissipation, and meanwhile the convection channel in the heat dissipation groove accelerates air flow and accelerates heat exchange. Meanwhile, when water appears on the groove body, the convection channel can serve as a drainage channel, drainage is conducted in time, meanwhile, heat transfer is accelerated, the water accumulation phenomenon is avoided, the waterproof performance is further improved, and meanwhile the heat dissipation performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission equipment, in particular to a heat dissipation bus duct. Background Art

[0002] For a three-phase five-wire transmission bus, it usually includes five-phase conductors of L1, L2, L3, N, and PE. The PE phase is connected to the shell as a grounding protection conductor. Especially for dense busbars, multi-phase conductors are densely arranged in the bus duct. It is necessary to solve the heat dissipation and waterproof problems of the bus conductors during operation. The existing bus duct structure design is unreasonable. For example, the public record of the comparative document Chinese patent CN206211466U states that the multi-phase conductors are closely fitted to each other and arranged side by side in the bus duct. When working, the multi-phase conductors conduct heat to the shell and rely on the shell to complete heat dissipation. At the same time, a silicone strip is arranged between the multi-phase conductors and the upper and lower cover plates to improve waterproofing. Effect; In fact, in the comparative document, the conductors located on the side directly conduct heat to the side plates of the shell for heat dissipation, but the conductors located in the middle are closely fitted to each other and the heat is not easy to dissipate. It is necessary to conduct heat to the side conductors and then from the side conductors to the side plates of the shell for heat dissipation, thereby increasing the temperature rise of the bus duct; secondly, when water accumulates in the U-shaped groove of the comparative document, it cannot be emptied in time. Since the plug is connected to the side plates, cover plates, etc. through rivets and is not integrated, it is inevitable that water will seep in from the connection. The silicone strip is prone to aging in a long-term high-temperature working environment, and its waterproof performance is greatly reduced, which is not conducive to the safe operation and efficient power transmission of multi-phase conductors.

[0003] Therefore, in view of the above-mentioned heat dissipation and waterproofing problems, the utility model proposes a heat dissipation bus duct. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a heat dissipation bus duct, which can improve the heat dissipation performance and waterproof performance of the bus duct.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A heat dissipation bus duct comprises a trough body with an I-shaped cross section formed integrally by an upper cover plate, a lower cover plate and a connector connected between the upper cover plate and the lower cover plate; a pair of side plates are installed between the upper cover plate and the lower cover plate, and the two side plates respectively form a left cavity and a right cavity with the left side wall and the right side wall of the connector for accommodating L1, L2, L3 and N phase conductors in a group of two phases; the connector is provided with a heat dissipation groove penetrating along the length direction of the trough body and a plurality of convection channels penetrating along the width direction of the trough body, and the trough body is an external PE phase.

[0007] In this embodiment, the cross-sections of the two side plates are both C-shaped structures, and the horizontal bending parts at the upper and lower ends of the two side plates are respectively fixedly connected to the upper cover plate and the lower cover plate.

[0008] In this embodiment, a plurality of first convex ribs evenly distributed along the length direction are provided on the side wall of the side plate away from the connecting body.

[0009] In this embodiment, positioning blocks abutting against the horizontal bending parts of the side plates are provided at the openings of the left cavity and the right cavity, and the surfaces of the positioning blocks can be covered with insulating waterproof layers.

[0010] In this embodiment, U-shaped grooves are provided on the sides of the upper cover plate and the lower cover plate away from the heat dissipation grooves. Connecting pieces are bolted at both ends of the U-shaped grooves. The connecting pieces are bolted with a pair of L-shaped protection plates symmetrical about the center axis of the heat dissipation groove, and form notches corresponding to the heat dissipation groove, the left cavity and the right cavity with the protection plates.

[0011] In this embodiment, the open ends on both sides of the heat dissipation groove are fully welded with internal PE phases to seal the heat dissipation groove along the length direction.

[0012] In this embodiment, the width of the heat dissipation groove is greater than the widths of the left cavity and the right cavity.

[0013] In this embodiment, a plurality of second convex ribs evenly distributed along the length direction are provided on the inner wall of the heat dissipation groove.

[0014] In this embodiment, the inner wall surface of the heat dissipation groove is set to be smooth.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] Adopting this solution, the integrally formed groove body ensures its integrity, avoiding the situation of water accumulation infiltration caused by insufficient sealing at the connection when it is not integrally connected. At the same time, a heat dissipation groove running through along the length direction of the groove body and a plurality of convection channels running through along the width direction of the groove body are provided at the connection of the groove body for dissipating heat from the conductors in each two-phase group in the left and right cavities. That is, the heat on one side of the same group of conductors is conducted to the side plate for heat dissipation, while the heat on the other side is conducted into the heat dissipation groove to complete heat dissipation. At the same time, the convection channels in the heat dissipation groove will accelerate the air flow and accelerate the heat exchange. At the same time, when there is water on the groove body, the convection channels can be used as drainage channels to drain water in time and accelerate heat transfer to avoid the occurrence of water accumulation phenomenon, further improving its waterproof performance while improving the heat dissipation performance. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a cross-sectional structure diagram of a heat dissipation busbar groove of the present invention;

[0019] Figure 2 It is a three-dimensional structure schematic diagram of a heat dissipation busbar groove of the present invention;

[0020] Figure 3 For Figure 2 an enlarged schematic diagram of part A;

[0021] Reference numerals in the drawings: 1 - upper cover plate; 2 - lower cover plate; 3 - connecting body; 4 - groove body; 41 - heat dissipation groove; 42 - convection channel; 5 - side plate; 51 - first convex rib; 6 - left cavity; 7 - right cavity; 8 - positioning block; 9 - adapter; 10 - protection plate; 11 - external PE phase. Detailed implementation manners

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the 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 should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it 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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] The present utility model mainly solves the problems existing in the prior art. For example, the conductor located on the side directly conducts heat to the side plate of the housing for heat dissipation, but the conductors located in the middle are in close contact with each other and it is not easy for the heat to dissipate. The heat needs to be conducted to the side conductor and then the side conductor conducts heat to the side plate of the housing for heat dissipation, thereby increasing the temperature rise of the busway. Secondly, when water accumulates in the U-shaped groove of the comparative document, it cannot be drained in time. Moreover, since the plug is connected to the side plate, the cover plate, etc. by rivets and is not integrated, it is inevitable that the accumulated water seeps in from the connection. And the silicone strip is prone to aging in a long-term high-temperature working environment, and the waterproof performance is greatly reduced.

[0026] Embodiment 1

[0027] This embodiment provides a heat dissipation busway, as Figure 1 and Figure 2 shown, which includes an upper cover plate 1, a lower cover plate 2, and a connecting body 3 connected between the upper cover plate 1 and the lower cover plate 2, integrally formed to form a groove body 4 with a "work" - shaped cross - section; a pair of side plates 5 are installed between the upper cover plate 1 and the lower cover plate 2, and the two side plates 5 respectively enclose a left cavity 6 and a right cavity 7 with the left side wall and the right side wall of the connecting body 3 for accommodating conductors of L1, L2, L3, and N phases in groups of two phases each; the connecting body 3 is provided with a heat dissipation groove 41 penetrating along the length direction of the groove body 4 and a plurality of convection channels 42 penetrating along the width direction of the groove body 4, and the groove body 4 is made of external PE.

[0028] In this embodiment, the cross - sections of the two side plates 5 are both C - shaped structures. The horizontal bending parts at the upper and lower ends of the two side plates 5 are respectively fixedly connected to the upper cover plate 1 and the lower cover plate 2. After the fixed connection, they enclose a left cavity 6 and a right cavity 7 with the left side wall and the right side wall of the connecting body 3 for accommodating conductors of L1, L2, L3, and N phases in groups of two phases each, as Figure 2 or Figure 3As shown, the conductors of phases L1, L2, L3 and N are covered with an insulating layer, and their insulating and heat-conducting properties are excellent. The conductors of phases L1, L2, L3 and N (busbars) are grouped in pairs of two phases and are located in the left and right cavities respectively. That is to say, the busbars of phases L1 and L2 are both located in the left inner cavity, and the busbars of phases L3 and N are both located in the right inner cavity. The two cavities are directly separated by the heat dissipation groove 41. The left side of the busbar of phase L1 is closely attached to the side plate 5, and the right side is closely attached to the busbar of phase L2. The left side of the busbar of phase L2 is closely attached to the right side of the busbar of phase L1, and the right side is closely attached to the heat dissipation groove 41. Similarly, the busbars of phases L3 and N are arranged in the same way. In the past, the busbars of phases L2 and L3 were closely attached, and their heat conduction effect was not good, and heat was easily accumulated. However, the present utility model conducts heat conduction on the accumulated heat through the heat dissipation groove 41 provided therein to improve the heat dissipation efficiency.

[0029] Working principle: The integrally formed groove body 4 ensures its integrity, avoiding the situation of water accumulation infiltration caused by insufficient sealing at the connection when it is not integrally connected. At the same time, the connection of the groove body 4 is provided with a heat dissipation groove 41 penetrating along the length direction of the groove body 4 and a number of convection channels 42 penetrating along the width direction of the groove body 4 for dissipating heat from the conductors grouped in pairs of two phases in the left and right cavities 7. That is, the heat of one side of the conductors in the same group is conducted to the side plate 5 for heat dissipation, and the heat of the other side is conducted into the heat dissipation groove 41 to complete heat dissipation. At the same time, the convection channels 42 in the heat dissipation groove 41 will accelerate the air flow and accelerate heat exchange. At the same time, when there is water on the groove body 4, the convection channels 42 can be used as drainage channels to drain water in time and accelerate heat transfer to avoid the occurrence of water accumulation phenomenon, further improving its waterproof performance while improving the heat dissipation performance.

[0030] Embodiment 2

[0031] In this embodiment, the open ends on both sides of the heat dissipation groove 41 are fully welded with an internal PE phase 11 to seal the heat dissipation groove 41 in the length direction. In the prior art, when evacuating the accidental current during single-phase-to-ground, the accidental current flows from the busbar housing to the PE line, and then quickly evacuates from the main equipotential and local equipotential points. If it is an independent PE or housing PE, there is uncertainty in the overcurrent capacity between the busbar unit housings and between the housing and the independent PE. Therefore, by providing two internal and external PE lines, the leakage current carrying capacity inside and outside the housing is effectively increased, avoiding the situation where the leakage current cannot be discharged in time due to insufficient flow, effectively avoiding uneven three-phase voltage drops, ensuring the temperature rise of each part, and effectively improving the grounding protection. When actually considering its power-on reliability, the power-on capacity of the PE phase needs to be considered. At this time, the width of the heat dissipation groove 41 is greater than the widths of the left cavity 6 and the right cavity 7, which is equivalent to directly expanding its power-on capacity and its performance is better than the national standard. At the same time, in the form of full welding, there will be no disconnection or break points, ensuring its stability. At this moment, the heat dissipation groove 41 is closed in the length direction. Under normal circumstances, the heat accumulated in the heat dissipation groove 41 is dissipated in the length direction, and the width direction is not considered. However, in this application, the heat dissipation groove 41 is closed in the length direction to improve its power supply stability, which will cause the problem that heat cannot be dissipated in the length direction. Then, new problems need to be further considered, and thus heat dissipation is carried out through the convection channels in the width direction, which not only improves its power supply stability but also ensures its good heat dissipation performance.

[0032] In this embodiment, the convection channels 42 are formed by providing through holes at the positions of the upper cover plate 1 and the lower cover plate 2 corresponding to the heat dissipation groove 41. The through holes of the upper cover plate 1 and the lower cover plate 2 are arranged opposite to each other to form convection, that is, when heat accumulates in the heat dissipation groove, the air is driven to accelerate heat dissipation through the convection holes. At the same time, when water appears on the upper cover plate 1 and the lower cover plate 2, this hole can be used as a drain hole and is independent of the left cavity and the right cavity, and will not affect the operation of the L1, L2, L3, and N-phase conductors. Moreover, water itself is a medium with good heat absorption performance. Therefore, while this hole plays a drainage role, the convected air and water can help further dissipate heat.

[0033] Embodiment 3

[0034] In this embodiment, as Figure 1 shown, positioning blocks 8 are provided at the openings of the left cavity 6 and the right cavity 7 and are in contact with the horizontally bent portions of the side plates 5. These positioning blocks 8 facilitate the installation of the side plates 5 and the L1, L2, L3, and N-phase conductors. At the same time, the surfaces of the positioning blocks 8 can be covered with an insulating waterproof layer to enhance the waterproof performance of the ends connected to the outside.

[0035] In this embodiment, as Figure 2As shown, on the sides of the upper cover plate 1 and the lower cover plate 2 away from the heat dissipation groove 41, there are U-shaped grooves. At both ends of the U-shaped groove, there are adapter pieces 9 connected by bolts. The adapter pieces 9 are bolted to a pair of L-shaped protection plates 10 that are axisymmetric about the center of the heat dissipation groove 41 and form notches corresponding to the heat dissipation groove 41, the left cavity 6, and the right cavity 7. During actual use, after the L1, L2, L3, and N-phase conductors are installed, the ends of the conductors pass through these notches, and the L-shaped protection plates 10 play a role in dust prevention and other protection. For the installation of the side plate 5 as Figure 2 and Figure 3 shown, it is not connected to the upper cover plate 1 and the lower cover plate 2 by bolts passing through the side plate. Instead, after the adapter piece 11 is bolted, the side plate 5 is installed in the gap between the bolt and the connecting body.

[0036] In this embodiment, on the inner wall of the heat dissipation groove 41, there are several second convex ribs evenly distributed along the length direction (not shown in the drawings, specifically refer to the first convex rib 51 for example). During operation, under the rapid heat dissipation of the established convection channel of the heat dissipation groove 41, by providing the second convex ribs, the overall heat dissipation performance of the heat dissipation groove 41 is further accelerated, and the temperature rise of each groove body 4 as a whole is further ensured.

[0037] In this embodiment, in order to adapt to the convection effect of the convection channel, the inner wall surface of the heat dissipation groove 41 is set to be smooth. When the wind passes through the heat dissipation groove 41, the smooth setting will reduce the friction on the inner wall of the heat dissipation groove 41 to a certain extent and make the flow smoother, actually to further enhance its convection effect.

[0038] In this embodiment, on the side wall of the side plate 5 away from the connecting body 3, there are several first convex ribs 51 evenly distributed along the length direction. During actual operation, the first convex ribs 51 play an effect of accelerating heat dissipation.

[0039] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A heat dissipation busbar trunking, characterized in that: It includes a groove body (4) with an "I" - shaped cross - section integrally formed by an upper cover plate (1), a lower cover plate (2), and a connecting body (3) connected between the upper cover plate (1) and the lower cover plate (2); a pair of side plates (5) are installed between the upper cover plate (1) and the lower cover plate (2), and the two side plates (5) respectively form a left cavity (6) and a right cavity (7) with the left side wall and the right side wall of the connecting body (3) for accommodating conductors of L1, L2, L3, and N phases grouped in pairs of two - phase; the connecting body (3) is provided with heat - dissipation grooves (41) penetrating along the length direction of the groove body (4) and a plurality of convection channels (42) penetrating along the width direction of the groove body (4), and the groove body (4) is an external PE phase.

2. The heat dissipation busbar according to claim 1, characterized in that: The open ends on both sides of the heat - dissipation groove (41) are fully welded with an internal PE phase (11) to seal the heat - dissipation groove (41) along the length direction.

3. The heat dissipation busbar trunking according to claim 2, characterized in that: The width of the heat - dissipation groove (41) is greater than the widths of the left cavity (6) and the right cavity (7).

4. The heat dissipation busbar according to claim 3, characterized in that The cross - sections of the two side plates (5) are both C - shaped structures, and the horizontal bending parts at the upper and lower ends of the two side plates (5) are respectively fixedly connected to the upper cover plate (1) and the lower cover plate (2).

5. The heat dissipation busbar according to claim 4, characterized in that: A number of first convex ribs (51) evenly distributed along the length direction are provided on the side wall of the side plate (5) far from the connecting body (3).

6. The heat dissipation busbar according to claim 5, wherein: Positioning blocks (8) abutting against the horizontal bending parts of the side plates (5) are provided at the openings of the left cavity (6) and the right cavity (7).

7. The heat dissipation busbar according to claim 3, wherein: U - shaped grooves are provided on the sides of the upper cover plate (1) and the lower cover plate (2) far from the heat - dissipation groove (41). The two ends of the U - shaped grooves are bolt - connected with adapter parts (9), and the adapter parts (9) are bolt - connected with a pair of L - shaped protection plates (10) symmetrical about the center axis of the heat - dissipation groove (41) and form notches corresponding to the heat - dissipation groove (41), the left cavity (6), and the right cavity (7).

8. The heat dissipation busbar according to claim 3, wherein: A number of second convex ribs distributed along the length direction are provided on the inner wall of the heat - dissipation groove (41).

9. A heat dissipation busbar groove according to any one of claims 1-8, characterized in that: The inner wall surface of the heat - dissipation groove (41) is smooth.

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