Circuit breaker structure based on flexible connection and heat dissipation design

Abstract

A circuit breaker structure based on flexible connections and heat dissipation design comprises a moving terminal fixing support, the flexible connections, a conductive block, a vacuum arc-extinguishing chamber, an insulating pull rod and an insulating supporting rod, the top of the moving terminal fixing support is connected with a conducting bar, the moving terminal fixing support is connected with the conductive block through the four flexible connections which are symmetrically distributed, and the vacuum arc-extinguishing chamber is connected with the insulating pull rod through the insulating supporting rod. One end of the vacuum arc-extinguishing chamber is inserted into a conical round hole in the conductive block and is connected with an insulating pull rod, the other end of the vacuum arc-extinguishing chamber is connected with a rear bracket, at least one group of L-shaped copper bars and at least one group of Z-shaped copper bars are mounted on the rear bracket, the L-shaped copper bars and the Z-shaped copper bars are arranged in a staggered manner, and the tail ends of the L-shaped copper bars and the Z-shaped copper bars are connected in an overlapped manner; the length of the insulation supporting rod can be adjusted, and the front plate, the moving terminal fixing support and the rear support form an integral frame of the circuit breaker. According to the circuit breaker structure, the heat dissipation performance, the installation flexibility, the compatibility and the current withstanding capability can be synchronously improved.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, specifically to a circuit breaker structure based on flexible connection and heat dissipation design, which can be widely used in power systems for circuit protection and control. Background Technology

[0002] In existing circuit breaker technology, conductive components suffer from insufficient heat dissipation area and a single heat dissipation path. Most existing circuit breaker connection components are solid or simple planar structures, making it easy for heat to accumulate in critical areas such as conductive blocks and busbars, hindering rapid heat exchange with the external environment. Over long-term operation, this accumulated heat causes component temperatures to rise, reducing conductivity and accelerating the aging of insulation materials, severely impacting the circuit breaker's operational stability and lifespan.

[0003] Existing circuit breakers mainly rely on rigid connections to fix core components such as vacuum interrupters and brackets. The installation structure is relatively fixed, and the position adjustment space of the vacuum interrupter terminals is extremely small. This makes them unable to adapt well to various special cabinet installation environments, increasing installation difficulty and cost.

[0004] Existing circuit breakers often lack the flexibility to select appropriate component sizes based on current ratings, resulting in insufficient compatibility when applied to circuits with different current ratings. Some existing gas-insulated switchgear circuit breakers cannot meet the requirements of single-break vacuum circuit breakers with a rated current of 3150A and above, making them prone to failure when subjected to high peak withstand current and short-time withstand current, thus affecting the stable operation of the power system. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a circuit breaker structure based on flexible connection and heat dissipation design. It constructs a multi-dimensional composite heat dissipation structure, increases the heat dissipation area and optimizes the heat dissipation path. Through flexible connections and adjustable insulating support rods, it achieves flexible adjustment of the installation position and adaptability to multiple scenarios. It also selects highly conductive and high-strength materials to improve the circuit breaker's current withstand capability.

[0006] The present invention adopts the following technical solution: a circuit breaker structure based on flexible connection and heat dissipation design, comprising: a moving terminal fixing bracket, a flexible connection, a conductive block, a vacuum interrupter, an insulating tie rod, and an insulating support rod; The top of the moving terminal fixing bracket is connected to a conductive busbar, and the conductive busbar is provided with heat dissipation holes; The moving terminal fixing bracket is connected to the conductive block through four symmetrically distributed flexible connections. The conductive block has a conical hole inside. One end of the vacuum interrupter is inserted into the conical hole inside the conductive block and connected to the insulating pull rod, while the other end is connected to the rear bracket. The rear bracket is equipped with at least one set of L-shaped copper busbars and at least one set of Z-shaped copper busbars. The L-shaped copper busbars and Z-shaped copper busbars are arranged alternately, and their ends are overlapped and connected. The L-shaped copper busbars are equipped with heat sinks in the horizontal direction, and the Z-shaped copper busbars are equipped with heat sinks in the vertical direction. The insulating support rod includes an adjustable-length insulating support rod one and an insulating support rod two. One end of the insulating support rod one and the insulating support rod two are connected to a front plate, and the other end is symmetrically connected to both sides of the moving terminal fixing bracket and the rear bracket, so that the front plate, the moving terminal fixing bracket and the rear bracket constitute an integral support frame.

[0007] According to the circuit breaker structure of claim 1, the conical hole of the conductive block is a through-type gradually expanding heat dissipation channel, and the hole diameter gradually increases along the direction of the vacuum interrupter.

[0008] Furthermore, the heat dissipation holes of the conductive busbar are arranged in an array.

[0009] Furthermore, there are three L-shaped copper busbars and three Z-shaped copper busbars, which are arranged in a three-dimensional staggered pattern on the rear support.

[0010] Furthermore, the rear bracket is provided with a modular interface, and the L-shaped copper busbar and the Z-shaped copper busbar are fixed to the modular interface by bolts.

[0011] Furthermore, the insulating support rod one and the insulating support rod two include an inner rod and an outer rod, and the inner rod and the outer rod are provided with multiple adjustment holes. The adjustment holes at different positions are fixed by bolts for adjusting the length of the insulating support rod.

[0012] Furthermore, it also includes a bellows, one end of which is disposed on the front plate and the other end is connected to the insulating tie rod.

[0013] Furthermore, it also includes a guide sleeve, which is disposed between the moving terminal fixing bracket and the vacuum interrupter, and the outer side of the vacuum interrupter inserted into the conductive block is sleeved with the guide sleeve.

[0014] Furthermore, the heat sink is a comb-shaped structure made of aluminum alloy and is fixed to the copper busbar with bolts.

[0015] Furthermore, by adjusting the lengths of insulating support rod one and insulating support rod two, the relative positions of the moving terminal fixing bracket and the rear bracket are adjusted synchronously for adjusting the position of the vacuum interrupter terminal.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The conductive block has gradually expanding conical holes inside, forming a through-type heat dissipation channel. Compared with traditional solid conductive blocks, this not only increases the internal heat dissipation surface area but also uses the conical structure to guide air convection, accelerating the dissipation of heat from the inside of the conductive block to the outside. On the conductive busbar on the top of the outer side of the moving terminal fixing bracket, heat dissipation holes are opened in a matrix. The diameter and spacing of the heat dissipation holes are optimized through thermal field simulation to ensure that the external heat dissipation area is maximized without affecting the mechanical strength of the conductive busbar, while forming an air circulation channel to accelerate the evaporation of heat from the surface of the conductive busbar. The three L-shaped copper busbars and three Z-shaped copper busbars on the rear bracket are arranged in a three-dimensional staggered manner. The L-shaped copper busbars are bolted to the heat sink in the horizontal direction, and the Z-shaped copper busbars are bolted to the heat sink in the vertical direction. The heat sink adopts a comb-shaped structure made of aluminum alloy, which increases the contact area with the air and quickly conducts heat on the copper busbar. The horizontal and vertical heat sinks form a three-dimensional heat dissipation network, realizing multi-dimensional heat dissipation synergy.

[0017] Flexible connections replace some rigid connections, utilizing their flexibility to absorb stress during position adjustments and avoid component damage caused by rigid connections. Adjustable insulating support rods are used, with adjustable holes allowing for flexible length adjustment, providing stronger installation adaptability compared to traditional fixed-length support rods. The overall circuit breaker structure design balances adjustment flexibility and connection stability, ensuring structural stability during operation through symmetrical fixation of double support rods while enabling position adjustments.

[0018] The size of the flexible connection and conductive block can be selected according to the current level to meet the needs of circuits with different current levels; the circuit breaker component materials with high conductivity and high strength are selected to meet the requirements of single-break vacuum circuit breakers with a rated current of 3150A and above, withstand high peak withstand current and short-time withstand current, improve the circuit breaker's withstand current capability, and improve the stability of the power system. Attached Figure Description

[0019] Figure 1 This is a front view of the circuit breaker of the present invention; Figure 2 This is a schematic diagram of the moving terminal fixing bracket structure of the circuit breaker of the present invention; Figure 3 This is a schematic cross-sectional view of the conductive block connection structure of the circuit breaker of the present invention; Figure 4 This is a schematic diagram of the conductive busbar array-type heat dissipation vent structure of the circuit breaker of the present invention; Figure 5 This is a schematic diagram of the circuit breaker insulation support rod connection structure of the present invention.

[0020] 1. Moving terminal fixing bracket; 2. Flexible connection; 3. Conductive block; 4. Conductive busbar; 5. Guide sleeve; 6. Vacuum interrupter; 7. Insulating pull rod; 8. Rear bracket; 9. L-shaped copper busbar; 10. Z-shaped copper busbar; 11. Radiator; 12. Front plate; 13. Insulating support rod one; 14. Insulating support rod two; 15. Corrugated pipe. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The embodiments described in this application are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0022] Reference Figures 1 to 5 The present invention provides a circuit breaker structure based on flexible connection and heat dissipation design, including: moving terminal fixing bracket 1, flexible connection 2, conductive block 3, conductive busbar 4, guide sleeve 5, vacuum interrupter 6, insulating pull rod 7, rear bracket 8, L-shaped copper busbar 9, Z-shaped copper busbar 10, heat sink 11, front plate 12, insulating support rod one 13, insulating support rod two 14, and corrugated pipe 15.

[0023] The front plate 12 is located at the front end of the circuit breaker. It is a flat plate structure with mounting holes on its surface to fix the bellows 15. The bellows 15 is a corrugated cylindrical structure and is a flexible sealing component. One end is fixed to the front plate 12, and the other end is fixedly connected to the insulating pull rod 7 and is connected to the external operating mechanism. While ensuring the flexibility of the insulating pull rod 7, it prevents external gas, dust and other substances from entering the circuit breaker, thus providing sealing protection.

[0024] One end of the insulating rod 7 passes through the front plate 12 and is fixedly connected to the bellows 15, while the other end is bolted to the moving contact inside the vacuum interrupter 6. The end of the vacuum interrupter 6 connected to the bellows 15 is inserted into the conical hole of the conductive block 3, and the other end is fixedly connected to the rear bracket 8 by bolts to achieve fixed support. The vacuum interrupter 6 maintains electrical conductivity with the conductive block 3 and the copper busbar on the rear bracket 8.

[0025] The moving terminal fixing bracket 1 is located in the middle of the circuit breaker, providing a supporting foundation for the overall structure of the circuit breaker. The moving terminal fixing bracket 1 is located between the vacuum interrupters, with one end connected to the moving terminal fixing bracket by bolts, and the other end sleeved with the outer side of the vacuum interrupter 6 near the conductive block 3. The guide sleeve 5 is hollow inside and made of epoxy resin material, used to fix and position the vacuum interrupter 6.

[0026] The top outer side of the moving terminal fixing bracket 1 is fixedly connected to the conductive busbar 4 by bolts, and the busbar 4 is electrically connected to the moving terminal fixing bracket 1. The surface is provided with an array of heat dissipation holes with a hole diameter of 5-8mm and a space distance of 10-15mm. While ensuring the mechanical strength of the conductive busbar 4, heat dissipation can be achieved through air convection.

[0027] Four flexible connectors 2 are symmetrically distributed below the moving terminal fixing bracket 1. A conductive block 3 is set in the middle of the four flexible connectors 2. One end of the flexible connector 2 is fixedly connected to the moving terminal fixing bracket 1 by bolts, and the other end is fixedly connected to the conductive block 3 by bolts. The flexible connector 2 adopts a flexible structure made of copper busbar, which has a certain amount of expansion and bending allowance. It can adapt to the positional displacement of the conductive block 3 within a certain range, so as to realize the flexible conductive connection between the moving terminal fixing bracket 1 and the conductive block 3, and provide buffer space for the position adjustment of the wiring terminal of the vacuum interrupter 6.

[0028] The conductive block 3 has a through conical hole inside, forming a gradually expanding heat dissipation channel. The diameter of the conical hole gradually increases along the direction of the vacuum interrupter. Heat can be quickly conducted to the air through the hole wall of the conical hole. At the same time, the conical channel accelerates the air flow and prevents heat from accumulating inside the conductive block 3.

[0029] The rear bracket 8 is located at the rear of the circuit breaker and is bolted to the vacuum interrupter 6, providing a mounting base for the copper busbars and radiator 11. A modular interface is provided on the side of the rear bracket 8 where it connects to the copper busbars. L-shaped copper busbars 9 are bolted to the modular interface of the rear bracket 8. The horizontal section is bolted to the radiator 11, and the end overlaps with the end of a Z-shaped copper busbar 10, and is bolted to achieve electrical conduction. The Z-shaped copper busbars 10 and L-shaped copper busbars 9 are staggered, with one end bolted to the modular interface of the rear bracket 8, and the vertical section bolted to the radiator 11. There are three Z-shaped copper busbars 10 and three L-shaped copper busbars 9, forming part of the conductive circuit. The radiator 11 is a comb-shaped structure made of aluminum alloy, absorbing heat from the copper busbars through thermal conduction and rapidly dissipating heat by increasing the contact area with the air.

[0030] Insulating support rod 13 and insulating support rod 24 are symmetrically distributed on both sides of the moving terminal fixing bracket 1 and the rear bracket 8, and are fixedly connected to the moving terminal fixing bracket 1 and the rear bracket 8 to form the overall frame of the circuit breaker. The rods of insulating support rod 13 and insulating support rod 24 are adjustable structures, including inner rods and outer rods, and the inner rods and outer rods are provided with multiple adjustment holes. By fixing the adjustment holes at different positions with bolts, the support length of the insulating support rod can be steplessly adjusted within the range of 500-800mm, while simultaneously serving the functions of insulation and support.

[0031] In this embodiment, one side of the moving terminal fixing bracket 1 and the rear bracket 8 is fixed by an insulating support rod 13, and the other side is fixed by an insulating support rod 14. The two ends of the insulating support rods are respectively connected to the front plate 12 and the rear bracket 8 by bolts. By adjusting the length of the two insulating support rods, the relative position of the moving terminal fixing bracket 1 and the rear bracket 8 can be adjusted synchronously, thereby enabling flexible adjustment of the position of the terminal of the vacuum interrupter 6 in the front-back and left-right directions, with an adjustment range of ±50mm.

[0032] This embodiment uses a combination of flexible connection 2 and conductive block 3. The size of flexible connection 2 and conductive block 3 can be selected according to the current level, which improves the compatibility of the circuit breaker.

[0033] In this embodiment, the moving terminal fixing bracket 1 is made of aluminum alloy, the flexible connection 2 is made of copper busbar, the conductive block 3 is made of pure copper, the conductive busbar 4 is made of copper busbar, the guide sleeve 5 is made of epoxy resin, the vacuum interrupter 6 is made of ceramic, the rear bracket 8 is made of aluminum alloy, the radiator 11 is made of aluminum alloy, the insulating pull rod 7 is made of epoxy resin, the insulating support rod 13 and the insulating support rod 14 are made of epoxy resin, the front plate 12 is made of steel plate, and the bellows 15 is made of stainless steel. High conductivity and high strength circuit breaker component materials are selected to improve the circuit breaker's current withstand capability, meet the usage requirements of single-break vacuum circuit breakers with a rated current of 3150A and above, and ensure operational stability in high current scenarios.

[0034] The beneficial effects of this invention are as follows: Compared with the prior art, the conductive block has gradually expanding conical holes inside, forming a through-type heat dissipation channel. Compared with the traditional solid conductive block, this not only increases the internal heat dissipation surface area, but also uses the conical structure to guide air convection, accelerating the dissipation of heat from the inside of the conductive block to the outside. On the conductive busbar on the top of the outer side of the moving terminal fixing bracket, heat dissipation holes are opened in a matrix. The diameter and spacing of the heat dissipation holes are optimized through thermal field simulation to ensure that the external heat dissipation area is maximized without affecting the mechanical strength of the conductive busbar, while forming an air circulation channel to accelerate the evaporation of heat on the surface of the conductive busbar. The three L-shaped copper busbars and three Z-shaped copper busbars on the rear bracket are arranged in a three-dimensional staggered manner. The L-shaped copper busbars are bolted to the heat sink in the horizontal direction, and the Z-shaped copper busbars are bolted to the heat sink in the vertical direction. The heat sink adopts a comb-shaped structure made of aluminum alloy, which increases the contact area with the air and quickly conducts heat on the copper busbar. The heat sinks in the horizontal and vertical directions form a three-dimensional heat dissipation network, realizing multi-dimensional heat dissipation synergy.

[0035] Flexible connections replace some rigid connections, utilizing their flexibility to absorb stress during position adjustments and avoid component damage caused by rigid connections. Adjustable insulating support rods are used, with adjustable holes allowing for flexible length adjustment, providing stronger installation adaptability compared to traditional fixed-length support rods. The overall circuit breaker structure design balances adjustment flexibility and connection stability, ensuring structural stability during operation through symmetrical fixation of double support rods while enabling position adjustments.

[0036] The size of the flexible connection and conductive block can be selected according to the current level to meet the needs of circuits with different current levels; the circuit breaker component materials with high conductivity and high strength are selected to meet the requirements of single-break vacuum circuit breakers with a rated current of 3150A and above, withstand high peak withstand current and short-time withstand current, improve the circuit breaker's withstand current capability, and improve the stability of the power system.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A circuit breaker structure based on soft connection and heat dissipation design, comprising: The utility model relates to a kind of vacuum interrupter, including movable terminal fixed support (1), soft connection (2), conductive block (3), vacuum arc-extinguishing chamber (6), insulating pull rod (7) and insulating support rod (13,14), it is characterized by: The movable terminal fixed support (1) is connected with the conductive row (4) on top, and the conductive row (4) is provided with heat dissipation holes; The movable terminal fixed support (1) is connected with the conductive block (3) by four symmetrical soft connections (2), and the conductive block (3) is internally provided with a tapered circular hole; One end of the vacuum arc-extinguishing chamber (6) is inserted into the tapered circular hole inside the conductive block (3) and connected with the insulating pull rod (7), and the other end is connected with the rear bracket (8); The rear bracket (8) is installed with at least one group of L-shaped copper row and at least one group of Z-shaped copper row, the L-shaped copper row and the Z-shaped copper row are staggered, and the ends of the two are connected in a superposed manner; The L-shaped copper row is installed with a radiator (11) in the horizontal direction, and the Z-shaped copper row is installed with a radiator (11) in the vertical direction; The insulating support rod (13, 14) includes insulating support rod one (13) and insulating support rod two (14), one end of the insulating support rod one (13) and the insulating support rod two (14) is connected with the front plate (12), and the other end is symmetrically connected to the two sides of the movable terminal fixed support (1) and the rear bracket (8), so that the front plate (12), the movable terminal fixed support (1) and the rear bracket (8) form an integral support frame.

2. The circuit breaker structure based on soft connection and heat dissipation design according to claim 1, characterized in that, The tapered circular hole of the conductive block (3) is a through gradual expansion type heat dissipation channel, and the hole diameter gradually increases in the direction of the vacuum arc-extinguishing chamber.

3. The circuit breaker structure based on soft connection and heat dissipation design according to claim 1, characterized in that, The heat dissipation holes of the conductive row (4) are arrayed.

4. The circuit breaker structure based on the soft connection and heat dissipation design according to claim 1, characterized in that, The number of the L-shaped copper row and the Z-shaped copper row is three respectively, and they are arranged in a three-dimensional staggered manner on the rear bracket (8).

5. The circuit breaker structure based on soft connection and heat dissipation design according to claim 1, characterized in that, The rear bracket (8) is provided with a modular interface, and the L-shaped copper row and the Z-shaped copper row are fixed on the modular interface by bolts.

6. The circuit breaker structure based on soft connection and heat dissipation design according to claim 1, characterized in that, The insulating support rod one (13) and the insulating support rod two (14) include inner rods and outer rods, and a plurality of adjusting holes are provided on the inner rods and the outer rods. By fixing the adjusting holes at different positions with bolts, the length of the insulating support rod (13, 14) can be adjusted.

7. The circuit breaker structure based on soft connection and heat dissipation design according to claim 1, characterized in that, It also includes a bellows (15), one end of which is arranged on the front plate (12), and the other end is connected with the insulating pull rod (7).

8. The circuit breaker structure based on soft connection and heat dissipation design according to claim 1, characterized in that, It also includes a guide sleeve (5), which is arranged between the movable terminal fixed support (1) and the vacuum arc-extinguishing chamber (6). The vacuum arc-extinguishing chamber (6) is inserted into the outer side of the one end of the conductive block and is matched with the guide sleeve (5).

9. The circuit breaker structure based on soft connection and heat dissipation design according to claim 1, characterized in that, The radiator (11) is a comb-shaped structure made of aluminum alloy and is fixed on the copper row by bolts.

10. The circuit breaker structure based on soft connection and heat dissipation design according to claim 1, characterized in that, By adjusting the length of the insulating support rod one (13) and the insulating support rod two (14), the relative position of the movable terminal fixed support (1) and the rear bracket (8) is adjusted synchronously, which is used for the position adjustment of the wiring end of the vacuum arc-extinguishing chamber (6).

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