Vacuum interrupter frame and vacuum circuit breaker having the same

Abstract

The utility model relates to electrical technical field, concretely relates to a vacuum arc-extinguishing chamber frame and vacuum circuit breaker with it. Including the support for installing vacuum arc-extinguishing chamber, wherein the support is designed to have multiple and multiple support is along the lateral interval arrangement, crossbeam, it extends along the lateral direction, wherein two groups crossbeam is connected to the outside of support in longitudinal symmetry, and crossbeam is designed to be at least partial structure is symmetrical in vertical direction, connecting structure is located between two adjacent support and is connected to two groups crossbeam, wherein the connecting structure is designed to be at least partial structure is symmetrical in vertical direction, and wherein multiple support, crossbeam and connecting structure are designed to be integral. According to the vacuum arc-extinguishing chamber frame of the utility model has better product overall mechanical property stability, reliability and injection moulding process stability compared with prior art.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, specifically to a vacuum interrupter frame and a vacuum circuit breaker having the same. Background Technology

[0002] Medium-voltage switchgear and ring main units are key equipment in medium-voltage power distribution systems, used for power distribution, control, and protection. Vacuum interrupters are the core components of these switchgear, responsible for efficiently extinguishing arcs in a vacuum environment during current interruption. The high insulation strength and rapid arc-extinguishing capability of vacuum interrupters directly ensure the circuit switching control and fault protection functions of the switchgear. Furthermore, the switchgear structure must be compatible with the vacuum interrupter in terms of installation, electrical connections, and operating mechanism linkage. For ring main units, vacuum interrupters are crucial for arc extinguishing in vacuum ring main units and solid-insulated ring main units. Working in conjunction with disconnecting switches and grounding switches, they jointly perform circuit switching, isolation, and grounding functions. Their stable performance and long lifespan also improve the reliability of the ring main unit and reduce maintenance requirements. Especially in urban power distribution network ring main unit scenarios, vacuum interrupters play a vital role in safely interrupting current and minimizing the fault range.

[0003] In the prior art, CN222637144U discloses a support member for a vacuum interrupter, a circuit breaker, and a gas-insulated switchgear. The support member includes: a left housing; a right housing opposite to the left housing, with a gap between the left and right housings; and a top housing, to which both the left and right housings are connected. The left, right, and top housings are integrally formed, and they surround a cavity for accommodating one vacuum interrupter. However, this support member only corresponds to one vacuum interrupter and cannot accommodate multiple vacuum interrupters. For a three-phase AC system, three independent support members are required, increasing the number of parts and thus increasing assembly difficulty.

[0004] As the core load-bearing component of the vacuum interrupter, the support frame must repeatedly withstand mechanical impacts and stresses during the switching process. However, existing injection-molded support frames generally suffer from shrinkage deformation, warping, and insufficient dimensional accuracy, leading to decreased mechanical strength and weakened fatigue resistance, directly affecting the frame's service life. Because the support frame operates under high stress conditions for extended periods, structural deterioration can cause loosening of fixation or positioning deviations, thus impacting the long-term reliability of the overall equipment. Therefore, optimizing the support frame structure is crucial for improving its durability and dimensional stability. Utility Model Content

[0005] Therefore, the purpose of this invention is to provide a vacuum interrupter frame with good durability.

[0006] This utility model provides a vacuum interrupter frame, comprising: a support member for mounting the vacuum interrupter, wherein the support member is designed to be multiple and the multiple support members are arranged at intervals along the transverse direction; a crossbeam extending along the transverse direction, wherein two sets of the crossbeams are symmetrically connected to the outer side of the support member in the longitudinal direction, and the crossbeams are at least partially symmetrical in the vertical direction; a connecting structure located between two adjacent support members and connected to the two sets of crossbeams, wherein the connecting structure is designed to be at least partially symmetrical in the vertical direction; and wherein the multiple support members, crossbeams and the connecting structure are designed as an integral piece.

[0007] In a preferred embodiment, the crossbeam includes a first connecting plate extending laterally, a second connecting plate disposed at intervals below the first connecting plate, and a third connecting plate extending vertically between the first connecting plate and the second connecting plate, wherein the first connecting plate and the second connecting plate have a group of reinforcing ribs.

[0008] In a preferred embodiment, the reinforcing rib group extends from the outer surface of the third connecting plate and / or the support member in a direction away from the support member, and the reinforcing rib group includes a cylindrical portion, a first reinforcing rib extending obliquely from the cylindrical portion toward the first connecting plate, and a second reinforcing rib extending obliquely toward the second connecting plate, with a third reinforcing rib extending laterally between two adjacent cylindrical portions.

[0009] In a preferred embodiment, the connection structure includes a fourth reinforcing rib extending laterally between two adjacent supports and a fifth reinforcing rib extending longitudinally between two sets of beams.

[0010] In a preferred embodiment, the support member includes a housing extending vertically and a fourth connecting plate located at the bottom of the housing, wherein the fourth connecting plate is connected to the interior of the housing by a plurality of uniformly and spaced sixth reinforcing ribs.

[0011] In a preferred embodiment, the outer side of the housing has a second reinforcing rib group, which is located on the portion of the housing above the crossbeam and is symmetrical about the longitudinal structure.

[0012] In a preferred embodiment, the second reinforcing rib group includes at least a seventh reinforcing rib located at the top of the housing, with a plurality of seventh reinforcing ribs arranged circumferentially and vertically spaced; an eighth reinforcing rib surrounding the outer surface of the housing, with a plurality of eighth reinforcing ribs arranged vertically spaced; and a ninth reinforcing rib extending downward from the top surface of the housing to the eighth reinforcing rib.

[0013] In a preferred embodiment, the fourth connecting plate has a first mounting hole for the stationary contact of the vacuum interrupter to pass through and a second mounting hole for fasteners to pass through.

[0014] In a preferred embodiment, the vacuum interrupter frame further includes connecting ends located at both ends of the crossbeams and connected to the two sets of crossbeams and the support members, the connecting ends being symmetrical in the longitudinal structure.

[0015] Another aspect of this utility model provides a vacuum circuit breaker, including the aforementioned vacuum interrupter frame and a vacuum interrupter installed within the support member.

[0016] The crossbeam design in this invention is symmetrical in at least a portion of its vertical structure. This symmetrical structure ensures balanced melt flow within the mold cavity, resulting in a more uniform distribution of pressure, temperature, and velocity fields. This effectively avoids uneven shrinkage and warping caused by flow differences. Simultaneously, the symmetrical flow path eliminates surface defects such as flow marks and weld line misalignment. From a materials science perspective, the symmetrical structure promotes the orderly arrangement of plastic molecular chains and reinforcing fibers, leading to a more uniform orientation structure within the material. This optimized microstructure significantly improves the mechanical properties of the product, including tensile strength and impact toughness, while effectively reducing the risk of performance fluctuations due to anisotropy. Attached Figure Description

[0017] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the vacuum interrupter and its frame in this utility model;

[0019] Figure 2 yes Figure 1 Cross-sectional view of the medium vacuum interrupter and its frame;

[0020] Figure 3 yes Figure 1 Bottom view of the medium vacuum interrupter and its frame;

[0021] Figure 4 This is a schematic diagram of the structure of the vacuum interrupter frame in this utility model;

[0022] Figure 5 yes Figure 4 Front view of the frame of the medium vacuum interrupter;

[0023] Figure 6 yes Figure 4 A bottom view of the frame of a medium vacuum interrupter.

[0024] Explanation of reference numerals in the attached figures

[0025] 100-Vacuum interrupter frame; 10-Support member; 11-Shell; 12-Fourth connecting plate; 121-First mounting hole; 122-Second mounting hole; 13-Sixth reinforcing rib; 14-Second reinforcing rib group; 141-Seventh reinforcing rib; 142-Eighth reinforcing rib; 143-Ninth reinforcing rib; 19-Receiving cavity; 20-Crossbeam; 21-First connecting plate; 22-Second connecting plate; 23-Third connecting plate; 24-Reinforcing rib group; 241-Cylindrical part; 242-First reinforcing rib; 243-Second reinforcing rib; 244-Third reinforcing rib; 30-Connecting structure; 31-Fourth reinforcing rib; 32-Fifth reinforcing rib; 40-Connecting end; 50-Vacuum interrupter; 51-Static contact; 52-Moving contact; 60-Fastener; X-Transverse; Y-Longitudinal; Z-Vertical. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to specific embodiments. The embodiments given are only for illustrating the present invention and are not intended to limit the scope of the present invention.

[0027] The schematic solutions of the technical solutions disclosed in this utility model are now described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of this utility model, the drawings are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of this utility model. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0028] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0029] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0030] In medium-voltage power distribution systems, vacuum interrupters, vacuum circuit breakers, and switchgear constitute a complete electrical protection system. Medium-voltage switchgear and ring main units, as system-level equipment, are core components of the power distribution network. Switchgear provides comprehensive protection and control functions, suitable for various power distribution scenarios; ring main units are specifically designed for ring network power supply systems, featuring compact structure and high cost-effectiveness. The core component of these complete sets of equipment is the vacuum circuit breaker, which, as a critical breaking unit, bears the heavy responsibility of circuit switching and protection.

[0031] The core of a vacuum circuit breaker lies in its internal vacuum interrupter, which utilizes the high insulation strength and excellent arc-extinguishing performance unique to the vacuum environment to ensure reliable current breaking capacity. In a three-phase AC system, the vacuum circuit breaker employs three independent vacuum interrupters, each corresponding to one of the three phases. During operation, the contacts of the three interrupters operate synchronously: closing ensures uninterrupted flow in the three-phase circuit; opening rapidly extinguishes the arc in each phase at the instant the current crosses zero. This coordinated working mechanism not only guarantees the synchronous breaking of the three-phase circuit but also fully leverages the advantage of rapid insulation recovery in the vacuum medium, providing a reliable guarantee for the stable operation of the power system.

[0032] The vacuum interrupter 50, as a core component of the vacuum circuit breaker, relies on a high vacuum environment (10 -4 A dielectric medium (above Pa) is used as the insulation and arc-extinguishing medium to ensure safe current conduction and reliable current interruption. During the conduction phase, the moving contact 52 and the stationary contact 51 are tightly fitted together, forming a low-resistance conductive path, allowing for stable current transmission. Due to the extremely high insulation strength of the vacuum environment, leakage current between contacts or insulation breakdown can be effectively prevented, ensuring the normal operation of the circuit.

[0033] When the circuit needs to be disconnected, the operating mechanism quickly drives the moving contact 52 to separate from the stationary contact 51. At the moment of separation, the current concentrates on the contact surface, and the resulting high temperature causes the contact material to melt and evaporate, forming a metal vapor arc. In a vacuum environment, the arc plasma spreads rapidly, and due to the extremely low thermal conductivity and heat dissipation of the vacuum, the arc cannot obtain continuous energy, and the arc column temperature drops sharply. As the recombination speed of charged particles increases, the dielectric strength recovers rapidly. Especially at the critical node where the alternating current crosses zero, the arc temporarily extinguishes, and the metal vapor rapidly condenses in the vacuum environment, allowing the insulation strength of the contact gap to recover rapidly, thereby achieving a complete circuit disconnection and preventing current from continuing to flow through the disconnected contacts, thus building a strong barrier for the safe and stable operation of the power system.

[0034] The vacuum interrupter frame 100 serves as the supporting structure for the vacuum interrupter 50, such as... Figures 1 to 3As shown, it provides stable support for the vacuum interrupter 50 on one hand, and serves as a connector to ensure reliable installation of the vacuum interrupter 50 and the electrical cabinet (medium-voltage switchgear or ring main unit) on the other. In one embodiment, Figures 1 to 3 The three vacuum interrupters 50 shown are respectively connected to the high-voltage circuit, the medium-voltage circuit and the low-voltage circuit.

[0035] In the prior art, the vacuum interrupter frame 100 is often obtained through injection molding. However, due to the unscientific and unreasonable structural design of the vacuum interrupter frame 100 itself, defects such as poor mechanical strength and low yield are caused. Therefore, this utility model proposes a vacuum interrupter frame 100 with a symmetrical structure, referring to... Figures 4 to 6 The system includes support members 10 for mounting a vacuum interrupter 50, wherein the support members 10 are designed to be multiple and spaced apart along the transverse X direction; crossbeams 20 extending along the transverse X direction, wherein two sets of crossbeams 20 are symmetrically connected to the outer sides of the support members 10 in the longitudinal Y direction, and the crossbeams 20 are designed to be at least partially symmetrical in the vertical Z direction; and connecting structures 30 located between two adjacent support members 10 and connecting the two sets of crossbeams 20, the connecting structures 30 being designed to be at least partially symmetrical in the vertical Z direction, wherein the multiple support members 10, crossbeams 20, and connecting structures 30 are designed as a single unit. It is understood that a receiving cavity 19 is formed on the support member 10, and the vacuum interrupter 50 is mounted within the receiving cavity 19.

[0036] In this invention, "symmetrically connected" in "the two sets of crossbeams 20 are symmetrically connected to the outer side of the support member 10 in the longitudinal Y direction" refers to spatial symmetry. The structures of the two sets of crossbeams 20 can be completely identical, partially identical, or completely different. It is understood that the two sets of crossbeams 20 are at least partially symmetrical in the vertical Z direction. In a preferred embodiment of this invention, the crossbeams 20 and the connecting structure 30 can be completely symmetrical or partially symmetrical in the vertical Z direction; for example, 70% to 80% of the structure is symmetrical, and the remaining structure is partially asymmetrical.

[0037] In another preferred embodiment of this utility model, the two sets of crossbeams 20 can also be a completely symmetrical structure in the longitudinal direction Y, or a partially symmetrical structure.

[0038] The cross beam 20 in this utility model is designed to be at least partially symmetric in the vertical direction Z. In this way, the runner in the injection mold is also generally symmetric, enabling the molten plastic to reach different regions of each cavity or mold cavity simultaneously and under equal pressure, avoiding uneven filling caused by different flow path lengths, ensuring the uniform distribution of the molten plastic in the mold, and greatly reducing the risk of defects such as injection shrinkage, warping, and dimensional deviation caused by flow imbalance. This symmetric design makes the vacuum interrupter frame 100 more evenly stressed when受力, reduces the phenomenon of stress concentration, and improves the stability of the overall structure. In addition, the design of the cross beam 20 and the connection structure 30 significantly improves the mechanical strength of the vacuum interrupter frame 100, enabling it to withstand greater mechanical stress, reducing the risk of fracture and deformation, and thus extending the service life of the product.

[0039] In the injection molding process, adopting a symmetric structure design can significantly improve the comprehensive performance of the product. This design first ensures the balanced flow of the melt in the mold cavity, making the pressure field, temperature field, and velocity field more evenly distributed, thus effectively avoiding problems such as uneven shrinkage and warping deformation caused by flow differences. At the same time, the symmetric flow path can eliminate surface defects such as flow marks and weld line offsets, which is particularly important for the surface quality of high-gloss or transparent products. From the perspective of materials science, the symmetric structure promotes the orderly arrangement of plastic molecular chains and reinforcing fibers, forming a more uniform orientation structure inside the material. This optimized microstructure significantly improves the mechanical properties of the product, including tensile strength and impact toughness, while effectively reducing the risk of performance fluctuations caused by anisotropy.

[0040] Specifically, as Figure 5 shown, in one embodiment, the cross beam 20 includes a first connecting plate 21 extending along the transverse direction X, a second connecting plate 22 spaced below the first connecting plate 21, and a third connecting plate 23 connecting between the first connecting plate 21 and the second connecting plate 22 and extending along the vertical direction Z. There is a reinforcing rib group 24 between the first connecting plate 21 and the second connecting plate 22. Further, the reinforcing rib group 24 extends away from the support member 10 from the outer surface of the third connecting plate 23 and / or the support member 10, and the reinforcing rib group 24 includes a cylindrical portion 241, a first reinforcing rib 242 extending obliquely from the cylindrical portion 241 to the first connecting plate 21, and a second reinforcing rib 243 extending obliquely to the second connecting plate 22. There is a third reinforcing rib 244 extending along the transverse direction X between adjacent two cylindrical portions 241. The cylindrical portion 241, the first reinforcing rib 242, the second reinforcing rib 243, and the third reinforcing rib 244 form a structure similar to a "rice" character.

[0041] Refer to Figure 6In one embodiment, the connecting structure 30 includes a fourth reinforcing rib 31 extending along the transverse X between two adjacent support members 10 and a fifth reinforcing rib 32 extending along the longitudinal Y between two sets of crossbeams 20. Preferably, the fourth reinforcing rib 31 has the same wall thickness as the fifth reinforcing rib 32.

[0042] exist Figures 4 to 6 In the illustrated embodiment, the support member 10 includes a housing 11 extending along the vertical Z-axis and a fourth connecting plate 12 located at the bottom of the housing 11. The fourth connecting plate 12 is connected to the interior of the housing 11 by a plurality of uniformly and spaced sixth reinforcing ribs 13. Furthermore, the fourth connecting plate 12 has a first mounting hole 121 for the stationary contact 51 of the vacuum interrupter 50 to pass through and a second mounting hole 122 for the fastener 60 to pass through. To increase the rigidity and strength of the support member 10, preferably, the outer side of the housing 11 has a second reinforcing rib group 14, which is located on the portion of the housing 11 above the crossbeam 20. The second reinforcing rib group 14 is preferably symmetrical in the longitudinal Y-axis structure. The second reinforcing rib group 14 includes at least a seventh reinforcing rib 141, an eighth reinforcing rib 142, and a ninth reinforcing rib 143. The seventh reinforcing rib 141 is located at the top of the shell 11, and a plurality of the seventh reinforcing ribs 141 are arranged at intervals along the circumference and vertical Z of the shell 11; the eighth reinforcing rib 142 surrounds the outer surface of the shell 11, and a plurality of the eighth reinforcing ribs 142 are arranged at intervals along the vertical Z; the ninth reinforcing rib 143 extends downward from the top surface of the shell 11 to the eighth reinforcing rib 142.

[0043] In addition, the vacuum interrupter frame 100 also includes connecting ends 40, which are located at both ends of the crossbeams 20 and connected to the two sets of crossbeams 20 and the support members 10. The connecting ends 40 are symmetrical in the longitudinal Y structure. The connecting ends 40 are used to connect the vacuum interrupter frame 100 to the inside of the electrical cabinet.

[0044] In a preferred embodiment, the vacuum interrupter frame 100 has a uniform wall thickness, preferably between 2.5 mm and 3.5 mm. Maintaining a uniform wall thickness design in injection molding offers multiple advantages for product quality and production efficiency. First, a uniform wall thickness ensures the stability and consistency of melt flow, avoiding differences in flow resistance, melt stagnation, or jetting caused by abrupt changes in thickness, thereby reducing surface defects and internal stress. Second, a uniform wall thickness distribution facilitates balanced cooling and shrinkage, significantly reducing the risk of warping, shrinkage marks, or dimensional deviations, which is particularly important for products with strict dimensional accuracy requirements. From a material performance perspective, a uniform wall thickness results in a more reasonable stress distribution in plastic products, effectively avoiding weak areas in mechanical properties caused by localized stress concentration, and ensuring the overall stability and reliability of the product's mechanical properties.

[0045] This utility model also provides a vacuum circuit breaker, including the vacuum interrupter frame 100 as described above and a vacuum interrupter 50 installed in the receiving cavity 19. For example... Figures 1 to 3 In the illustrated embodiment, the vacuum interrupter frame 100 includes three spaced-apart support members 10, and three vacuum interrupters 50 are respectively located within corresponding receiving cavities 19. The three vacuum interrupters 50 are respectively connected to a high-voltage circuit, a medium-voltage circuit, and a low-voltage circuit, and the three vacuum interrupters 50 operate simultaneously to connect or disconnect the circuit. The vacuum interrupter assembly has the same advantages as the vacuum interrupter frame 100 described above, and will not be repeated here.

[0046] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0047] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A vacuum interrupter frame, characterized in that, include: Support members (10) for mounting vacuum interrupter (50), wherein the support members (10) are designed to have a plurality of them and the plurality of the support members (10) are arranged at transverse (X) intervals; A crossbeam (20) extending along the transverse (X) direction, wherein two sets of the crossbeams (20) are symmetrically connected to the outside of the support (10) in the longitudinal (Y) direction, and the crossbeams (20) are designed to be at least partially symmetrical in the vertical (Z) direction; A connecting structure (30) located between two adjacent supports (10) and connected to two sets of beams (20), wherein the connecting structure (30) is designed to be at least partially symmetrical in the vertical (Z) direction; and The multiple support members (10), crossbeams (20) and connecting structures (30) are designed as a single unit.

2. The vacuum interrupter frame according to claim 1, characterized in that, The crossbeam (20) includes a first connecting plate (21) extending along the transverse (X), a second connecting plate (22) spaced below the first connecting plate (21), and a third connecting plate (23) extending along the vertical (Z) between the first connecting plate (21) and the second connecting plate (22), with a reinforcing rib group (24) between the first connecting plate (21) and the second connecting plate (22).

3. The vacuum interrupter frame according to claim 2, characterized in that, The reinforcing rib group (24) extends from the outer surface of the third connecting plate (23) and / or the support member (10) in a direction away from the support member (10), and the reinforcing rib group (24) includes a cylindrical portion (241), a first reinforcing rib (242) extending obliquely from the cylindrical portion (241) toward the first connecting plate (21) and a second reinforcing rib (243) extending obliquely toward the second connecting plate (22), and a third reinforcing rib (244) extending along the transverse direction (X) between two adjacent cylindrical portions (241).

4. The vacuum interrupter frame according to claim 1, characterized in that, The connection structure (30) includes a fourth reinforcing rib (31) extending in the transverse (X) direction between two adjacent support members (10) and a fifth reinforcing rib (32) extending in the longitudinal (Y) direction between two sets of beams (20).

5. The vacuum interrupter frame according to claim 1, characterized in that, The support member (10) includes a housing (11) extending along the vertical direction (Z) and a fourth connecting plate (12) located at the bottom of the housing (11), wherein the fourth connecting plate (12) is connected to the interior of the housing (11) by a plurality of uniformly and spaced sixth reinforcing ribs (13).

6. The vacuum interrupter frame according to claim 5, characterized in that, The outer side of the shell (11) has a second reinforcing rib group (14), which is located on the portion of the shell (11) above the crossbeam (20) and is symmetrical in the longitudinal (Y) structure.

7. The vacuum interrupter frame according to claim 6, characterized in that, The second reinforcing rib group (14) includes at least: The seventh reinforcing rib (141) is located at the top of the shell (11), and a plurality of the seventh reinforcing ribs (141) are arranged at intervals along the circumference and vertical (Z) of the shell (11); An eighth reinforcing rib (142) surrounds the outer surface of the shell (11), and a plurality of the eighth reinforcing ribs (142) are arranged at intervals along the vertical (Z) direction; The ninth reinforcing rib (143) extends downward from the top surface of the shell (11) to the eighth reinforcing rib (142).

8. The vacuum interrupter frame according to claim 5, characterized in that, The fourth connecting plate (12) has a first mounting hole (121) through which the stationary contact (51) of the vacuum interrupter (50) passes and a second mounting hole (122) through which the fastener (60) passes.

9. The vacuum interrupter frame according to claim 1, characterized in that, The vacuum interrupter frame also includes a connecting end (40), which is located at both ends of the crossbeam (20) and connected to the two sets of the crossbeams (20) and the support (10). The connecting end (40) is symmetrical in the longitudinal (Y) structure.

10. A vacuum circuit breaker, characterized in that, It includes a vacuum interrupter frame (100) according to any one of claims 1-9 and a vacuum interrupter (50) installed in the support (10).

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