A heat dissipation structure for a reclosing circuit breaker

Abstract

The utility model relates to the technical field of reclosing circuit breaker, specifically relates to a heat dissipation structure for reclosing circuit breaker, including circuit breaker, the one side fixedly connected with backplate of circuit breaker, the top and bottom of backplate are installed with a plurality of connecting pieces respectively, the one side of circuit breaker is provided with the heat dissipation assembly for the heat dissipation of the inside and connecting piece of circuit breaker, and the heat dissipation assembly includes the cover plate fixedly connected in the one side of backplate, the utility model discloses the heat dissipation assembly, the cover plate fixed in the one side of backplate and a plurality of radiating fins, the radiating fin is arranged along the cover plate surface, forms the large -area heat dissipation area, and the convection heat dissipation effect is improved, and at the same time, sets up S -shaped liquid pipe in every radiating fin, forms the dense liquid cooling channel structure, and the coolant can continuously circulate and take away the heat, avoids the local overheating phenomenon, and compared with traditional natural air cooling, this liquid cooling structure has higher heat conduction efficiency and temperature control precision, especially suitable for the stable operation demand of high frequency reclosing, high load circuit breaker.

Description

Technical Field

[0001] This utility model relates to the field of reclosing circuit breaker technology, and in particular to a heat dissipation structure for reclosing circuit breakers. Background Technology

[0002] Reclosing circuit breakers are widely used in power distribution systems to quickly disconnect the circuit in the event of a fault or power surge and automatically restore power supply after a short time. During operation, especially when the circuit breaker is frequently switching current, operating under high load, or experiencing a short circuit, its internal components such as conductive parts, arc extinguishing plates, and terminals will heat up rapidly and are prone to heat accumulation.

[0003] In existing technologies, such as the "Self-Resetting Over / Under Voltage Reclosing Circuit Breaker" with announcement number CN212542295U, a housing, an operating handle, and a reclosing mechanism are included. The operating handle is located on one side of the housing, and the reclosing mechanism is located at one end of the housing. A heat dissipation hole is opened on one side of the housing, and a dust baffle is connected above the heat dissipation hole. Although this technology improves heat dissipation while preventing dust, it still has some drawbacks in actual use. Although the heat dissipation hole is set on the back plate to achieve heat dissipation through natural air convection, this structure, although simple, is a passive heat dissipation method. Under high temperature and high frequency operating conditions, the heat dissipation efficiency is low, and heat is not easily dissipated in time, which can easily cause the internal temperature of the circuit breaker to rise, affecting the performance and service life of the components. Especially at the connection point of the power cord, hot spots are easily formed due to the concentrated current. If heat dissipation is not timely, it can lead to oxidation, loosening, or even burning of the terminals. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a heat dissipation structure for reclosing circuit breakers, so as to solve the problem that existing reclosing circuit breakers rely solely on heat dissipation holes for natural heat dissipation, resulting in low heat dissipation efficiency and difficulty in meeting the thermal management requirements under high load or frequent operation.

[0005] To achieve the above objectives, this utility model provides a heat dissipation structure for a reclosing circuit breaker, including a circuit breaker. A back plate is fixedly connected to one side of the circuit breaker. Multiple connecting plates are respectively installed on the top and bottom of the back plate. A heat dissipation assembly for dissipating heat from the inside of the circuit breaker and the connecting plates is provided on one side of the circuit breaker. The heat dissipation assembly includes a cover plate fixedly connected to one side of the back plate. Multiple heat dissipation fins are fixedly connected to one side of the cover plate. Liquid pipes are fixedly connected to the inside of the multiple heat dissipation fins in an S-shape. A first heat-conducting plate is fixedly connected to one side of the connecting plates. The ends of the multiple first heat-conducting plates, respectively, passing through the inside of the cover plate and fixedly connected to both ends of the heat dissipation fins, are provided on one side of the back plate. A heat-conducting component for dissipating heat from the arc-extinguishing plates inside the circuit breaker is provided on one side of the back plate.

[0006] Preferably, a plurality of first heat dissipation holes are provided on one side of the back plate, and the interior of the first heat dissipation holes is connected to the interior of the circuit breaker. A plurality of second heat dissipation holes are provided inside the cover plate, and the positions of the second heat dissipation holes correspond to the positions of the first heat dissipation holes, and the positions of the plurality of second heat dissipation holes are located on one side of the heat sink.

[0007] Preferably, the cover plate is fixedly connected to the top and bottom of the back plate, and the alignment block is provided with multiple heat dissipation grooves inside. Multiple arc plates are fixedly connected inside the heat dissipation grooves. The position of the heat dissipation grooves corresponds to the position of the connecting piece. The arc plates are made of ceramic.

[0008] Preferably, a slot is provided on one side of the cover plate, and a protective cover is engaged inside the slot. The protective cover covers the outside of the heat sink. Bolts are threaded to both sides of the cover plate, and one end of the bolt passes through the side wall of the cover plate and is threaded to one side of the protective cover.

[0009] Preferably, the protective cover has two alignment holes on one side, the input end of the liquid pipe is connected to an input pipe, the output end of the liquid pipe is connected to an output pipe, the ends of the input pipe and the output pipe away from the liquid pipe pass through the interior of the two alignment holes, and the open ends of the input pipe and the output pipe are both provided with plugs.

[0010] Preferably, a plurality of third heat dissipation holes are provided on one side of the protective cover, and a plurality of shielding covers are fixedly connected to one side of the protective cover. The shielding covers are triangular in shape and have heat dissipation vents at their bottoms. The positions of the plurality of shielding covers correspond to the positions of the plurality of third heat dissipation holes.

[0011] Preferably, the heat-conducting assembly includes a plurality of reinforcing ribs fixedly connected to one side of the back plate, and the bottom of one side of the plurality of reinforcing ribs is fixedly connected to the top of one side of the arc-extinguishing plate inside the circuit breaker.

[0012] Preferably, a second heat-conducting plate is fixedly connected to the side of the reinforcing rib away from the arc-extinguishing plate, and multiple connecting holes are opened inside the cover plate. The side of the second heat-conducting plate away from the reinforcing rib passes through the interior of the connecting holes and contacts one side of the heat sink.

[0013] The beneficial effects of this utility model are:

[0014] 1. The heat dissipation components consist of a cover plate and multiple heat sinks fixed to one side of the back plate. The heat sinks are arranged along the surface of the cover plate to form a large heat dissipation area, improving the convective heat dissipation effect. At the same time, S-shaped liquid pipes are set inside each heat sink to form a dense liquid cooling channel structure. The coolant can continuously circulate and remove heat, avoiding local overheating. Compared with traditional natural air cooling, this liquid cooling structure has higher thermal conductivity and temperature control accuracy, and is especially suitable for the stable operation requirements of high-frequency reclosing and high-load circuit breakers. In addition, the connecting pieces are connected to the heat sinks through a first heat-conducting plate. Since the connecting pieces will continuously generate heat during the power-on process, especially under high current conditions, the heat generation is more significant. This structure has a first heat-conducting plate on the outside of each connecting piece, and one end of it extends into the inside of the cover plate to directly connect with the heat sink. This allows the heat generated by the connecting pieces to be quickly dissipated, effectively preventing the loosening, oxidation or insulation aging of the wiring terminals due to overheating, and improving the thermal stability and long-term safety of the wiring area.

[0015] By incorporating heat-conducting components, multiple reinforcing ribs are installed on one side of the backplate near the arc-extinguishing plate to enhance the heat exchange capacity of the arc-extinguishing zone. A second heat-conducting plate is connected to one side of the reinforcing ribs. This heat-conducting plate extends through the connection holes inside the cover plate, forming a heat-conducting contact path with the heat sink, thus constructing a three-dimensional heat conduction link from the arc-extinguishing zone to the external heat sink. This structure significantly improves the heat dissipation efficiency of the arc-extinguishing plate, preventing it from deforming or failing due to excessive temperature, thereby maintaining good breaking capacity and response speed. At the same time, the reinforcing ribs can improve the overall mechanical strength of the arc-extinguishing channel, preventing structural deformation or damage caused by high-temperature arc erosion or air pressure impact. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, 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 for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the protective cover of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the cover plate of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the back plate of this utility model;

[0021] Figure 5 This is a schematic diagram of the arc plate structure of this utility model.

[0022] The diagram is marked as follows:

[0023] 1. Circuit breaker; 2. Backplate; 3. Connecting plate; 4. Reinforcing rib; 5. First heat dissipation hole; 6. First heat conduction plate; 7. Second heat conduction plate; 8. Cover plate; 9. Second heat dissipation hole; 10. Connecting hole; 11. Alignment block; 12. Arc plate; 13. Heat sink; 14. Liquid pipe; 15. Input pipe; 16. Output pipe; 17. Slot; 18. Protective cover; 19. Shielding cover; 20. Bolt; 21. Alignment hole; 22. Heat dissipation groove. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] Such as this utility model Figures 1 to 5The diagram shows a heat dissipation structure for a reclosing circuit breaker, including a circuit breaker 1. A back plate 2 is fixedly connected to one side of the circuit breaker 1. Multiple connecting pieces 3 are respectively installed on the top and bottom of the back plate 2. A heat dissipation assembly for dissipating heat from the inside of the circuit breaker 1 and the connecting pieces 3 is provided on one side of the circuit breaker 1. The heat dissipation assembly includes a cover plate 8 fixedly connected to one side of the back plate 2. Multiple heat sinks 13 are fixedly connected to one side of the cover plate 8. Liquid pipes 14 are fixedly connected to the inside of the multiple heat sinks 13 in an S-shape. A first heat-conducting plate 6 is fixedly connected to one side of the connecting pieces 3. The ends of the multiple first heat-conducting plates 6, which are respectively away from the connecting pieces 3, pass through the inside of the cover plate 8 and are fixedly connected to both ends of the heat sinks 13. A heat-conducting assembly for dissipating heat from the arc-extinguishing plates inside the circuit breaker 1 is provided on one side of the back plate 2.

[0027] The heat dissipation components include a cover plate 8 fixed to one side of the back plate 2 and multiple heat sinks 13. The heat sinks 13 are arranged along the surface of the cover plate 8 to form a large heat dissipation area, which improves the convective heat dissipation effect. At the same time, S-shaped liquid pipes 14 are set inside each heat sink 13 to form a dense liquid cooling channel structure. The coolant can continuously circulate and remove heat, avoiding local overheating. Compared with traditional natural air cooling, this liquid cooling structure has higher thermal conductivity and temperature control accuracy, and is especially suitable for the stable operation requirements of high-frequency reclosing and high-load circuit breakers 1.

[0028] like Figures 1 to 5 As shown, a plurality of first heat dissipation holes 5 are provided on one side of the back plate 2. The interior of the first heat dissipation holes 5 is connected to the interior of the circuit breaker 1. A plurality of second heat dissipation holes 9 are provided inside the cover plate 8. The positions of the second heat dissipation holes 9 correspond to the positions of the first heat dissipation holes 5, and the positions of the plurality of second heat dissipation holes 9 are located on one side of the heat sink 13.

[0029] By setting multiple corresponding first heat dissipation holes 5 and second heat dissipation holes 9 between the cover plate 8 and the back plate 2, the air inside the circuit breaker 1 is connected to the outside air. With the arrangement of the heat sink 13, a composite heat dissipation method of "internal and external convection + direct heat exchange" is realized, providing a more active, efficient and durable cooling channel for the circuit breaker 1.

[0030] like Figure 1 , Figure 4 and Figure 5 As shown, the top and bottom of the cover plate 8 on one side of the back plate 2 are respectively fixedly connected to the alignment block 11. The alignment block 11 has multiple heat dissipation grooves 22 inside. Multiple arc plates 12 are fixedly connected inside the heat dissipation grooves 22. The position of the heat dissipation grooves 22 corresponds to the position of the connecting piece 3. The arc plates 12 are made of ceramic.

[0031] By setting alignment blocks 11 at the top and bottom of the cover plate 8, and opening multiple heat dissipation grooves 22 inside the alignment blocks 11, and using the ceramic arc plate 12 fixedly installed inside the heat dissipation grooves 22, the heat generated by the connecting piece 3 during operation can be quickly conducted and diffused. The ceramic material has excellent insulation properties and will not generate electrical interference, ensuring heat dissipation while improving overall electrical safety. In addition, the heat dissipation grooves 22 correspond to the positions of the connecting piece 3, and the structure is precisely matched, further enhancing the heat dissipation efficiency, helping to maintain the stable temperature of the connecting piece 3 and extend its service life.

[0032] like Figures 1 to 4 As shown, a slot 17 is provided on one side of the cover plate 8, and a protective cover 18 is engaged inside the slot 17. The protective cover 18 covers the outside of the heat sink 13. Bolts 20 are threadedly connected to both sides of the cover plate 8. One end of the bolt 20 passes through the side wall of the cover plate 8 and is threadedly connected to one side of the protective cover 18.

[0033] By setting a slot 17 on one side of the cover plate 8 and engaging the protective cover 18, the protective cover 18 can be securely placed on the outside of the heat sink 13, providing effective protection and preventing external dust, moisture or foreign objects from entering the heat dissipation area, thus ensuring the long-term stable operation of the heat sink 13. At the same time, bolts 20 are provided on both sides of the cover plate 8, and the bolts 20 are threadedly connected to one side of the protective cover 18, which not only secures the protective cover 18 but also facilitates later maintenance. It should be noted that the protective cover 18 has threaded holes on both sides corresponding to the bolts 20, which facilitates the connection of the bolts 20.

[0034] like Figures 1 to 4 As shown, two alignment holes 21 are opened on one side of the protective cover 18. The input end of the liquid pipe 14 is connected to the input pipe 15, and the output end of the liquid pipe 14 is connected to the output pipe 16. The ends of the input pipe 15 and the output pipe 16 away from the liquid pipe 14 pass through the interior of the two alignment holes 21. The open ends of the input pipe 15 and the output pipe 16 are both provided with plugs.

[0035] During operation, the circuit breaker 1 generates a large amount of heat in areas such as the connecting piece 3 and internal conductive components through the heat sink 13 and input pipe 15. This heat is rapidly conducted to the heat sink 13 inside the cover plate 8 via the first heat-conducting plate 6 located on the connecting piece 3. The heat sink 13 has ventilation holes on its exterior, forming a natural convection channel, while its interior has an S-shaped liquid pipe 14 for circulating coolant to achieve active cooling. Heat is quickly carried away in the heat sink 13, preventing heat accumulation in critical areas such as the connecting piece 3. Simultaneously, the input pipe 15 and output pipe 16 facilitate the replacement of the coolant inside the liquid pipe 14. It should be noted that during actual use, to prevent electrical contact between the input pipe 15 and output pipe 16 and surrounding metal structures, or damage to the pipes due to vibration and friction, the outside of the input pipe 15 and output pipe 16 should be wrapped with insulating cloth or insulating tape to ensure electrical insulation performance and pipe lifespan, ensuring the stable and safe operation of the entire cooling system.

[0036] like Figure 1 As shown, a plurality of third heat dissipation holes are provided on one side of the protective cover 18, and a plurality of shielding covers 19 are fixedly connected to one side of the protective cover 18. The shielding covers 19 are triangular in shape, and heat dissipation vents are provided at the bottom of the shielding covers 19. The positions of the plurality of shielding covers 19 correspond to the positions of the plurality of third heat dissipation holes respectively.

[0037] By using the shielding cover 19 and the third heat dissipation hole, air circulation inside the protective cover 18 is ensured, while preventing a large amount of dust from directly entering the interior of the protective cover 18 through the third heat dissipation hole, thus avoiding the problem of dust accumulation inside the protective cover 18.

[0038] like Figures 1 to 4 As shown, the heat-conducting assembly includes multiple reinforcing ribs 4 fixedly connected to one side of the back plate 2. The bottom of one side of the multiple reinforcing ribs 4 is fixedly connected to the top of one side of the arc-extinguishing plate inside the circuit breaker 1. A second heat-conducting plate 7 is fixedly connected to the side of the reinforcing ribs 4 away from the arc-extinguishing plate. Multiple connecting holes 10 are opened inside the cover plate 8. The side of the second heat-conducting plate 7 away from the reinforcing ribs 4 passes through the interior of the connecting holes 10 and contacts one side of the heat sink 13.

[0039] By setting up heat-conducting components, multiple reinforcing ribs 4 are set on one side of the back plate 2 near the arc-extinguishing plate to enhance the heat exchange capacity of the arc-extinguishing zone. One side of the reinforcing rib 4 is connected to a second heat-conducting plate 7, which extends through the connecting hole 10 inside the cover plate 8 to form a heat-conducting contact path with the heat sink 13, thus constructing a three-dimensional heat conduction link from the arc-extinguishing zone to the external heat sink 13. This structure significantly improves the heat dissipation efficiency of the arc-extinguishing plate, preventing it from deforming or failing due to excessive temperature, thereby maintaining good breaking capacity and response speed. At the same time, the reinforcing ribs 4 can improve the overall mechanical strength of the arc-extinguishing channel, preventing structural deformation or damage caused by high-temperature arc erosion or air pressure impact. During arc extinguishing, the reinforcing ribs 4 enhance the stretching and cooling process of the arc by changing the movement path of the arc in the channel, thereby improving the arc extinguishing efficiency.

[0040] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0041] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat dissipation structure for a reclosing circuit breaker, comprising a circuit breaker (1), one side of the circuit breaker (1) is fixedly connected with a back plate (2), the top and bottom of the back plate (2) are respectively provided with a plurality of connecting plates (3), characterized in that, A heat dissipation assembly for dissipating heat from the inside of the circuit breaker (1) and the connecting piece (3) is provided on one side of the circuit breaker (1). The heat dissipation assembly includes a cover plate (8) fixedly connected to one side of the back plate (2). A plurality of heat sinks (13) are fixedly connected to one side of the cover plate (8). Liquid pipes (14) are fixedly connected to the inside of the plurality of heat sinks (13) in an S-shape. A first heat-conducting plate (6) is fixedly connected to one side of the connecting piece (3). The ends of the plurality of first heat-conducting plates (6) away from the connecting piece (3) pass through the inside of the cover plate (8) and are fixedly connected to both ends of the heat sinks (13). A heat-conducting component for dissipating heat from the arc-extinguishing plates inside the circuit breaker (1) is provided on one side of the back plate (2).

2. The heat dissipating structure for a reclosing circuit breaker according to claim 1, wherein The back plate (2) has a plurality of first heat dissipation holes (5) on one side. The interior of the first heat dissipation holes (5) is connected to the interior of the circuit breaker (1). The cover plate (8) has a plurality of second heat dissipation holes (9) inside. The positions of the second heat dissipation holes (9) correspond to the positions of the first heat dissipation holes (5), and the positions of the plurality of second heat dissipation holes (9) are located on one side of the heat sink (13).

3. The heat dissipating structure for a reclosing circuit breaker according to claim 1, wherein The cover plate (8) is fixedly connected to the top and bottom of the back plate (2) respectively. The alignment block (11) has multiple heat dissipation grooves (22) inside. Multiple arc plates (12) are fixedly connected inside the heat dissipation grooves (22). The position of the heat dissipation grooves (22) corresponds to the position of the connecting piece (3). The arc plates (12) are ceramic.

4. The heat dissipating structure for a reclosing circuit breaker according to claim 3, wherein A slot (17) is provided on one side of the cover plate (8), and a protective cover (18) is engaged inside the slot (17). The protective cover (18) covers the outside of the heat sink (13). Bolts (20) are threadedly connected to both sides of the cover plate (8). One end of the bolt (20) passes through the side wall of the cover plate (8) and is threadedly connected to one side of the protective cover (18).

5. The heat dissipating structure for a reclosing circuit breaker according to claim 4, wherein Two alignment holes (21) are provided on one side of the protective cover (18). The input end of the liquid pipe (14) is connected to the input pipe (15), and the output end of the liquid pipe (14) is connected to the output pipe (16). The ends of the input pipe (15) and the output pipe (16) away from the liquid pipe (14) pass through the interior of the two alignment holes (21). The opening ends of the input pipe (15) and the output pipe (16) are both provided with plugs.

6. The heat dissipating structure for a reclosing circuit breaker according to claim 5, wherein The protective cover (18) has multiple third heat dissipation holes on one side, and multiple shielding covers (19) are fixedly connected to one side of the protective cover (18). The shielding cover (19) is triangular in shape, and a heat dissipation port is opened at the bottom of the shielding cover (19). The positions of the multiple shielding covers (19) correspond to the positions of the multiple third heat dissipation holes respectively.

7. The heat dissipating structure for a reclosing circuit breaker according to claim 1, wherein The heat-conducting component includes multiple reinforcing ribs (4) fixedly connected to one side of the back plate (2), and the bottom of one side of the multiple reinforcing ribs (4) is fixedly connected to the top of one side of the arc-extinguishing plate inside the circuit breaker (1).

8. The heat dissipating structure for a reclosing circuit breaker according to claim 7, wherein The reinforcing rib (4) is fixedly connected with a second heat-conducting plate (7) away from one side of the arc-extinguishing sheet, a plurality of connecting holes (10) are formed in the inner portion of the cover plate (8), and one side of the second heat-conducting plate (7) away from the reinforcing rib (4) is in contact with one side of the radiating fin (13) penetrating through the inner portion of the connecting hole (10).

Images