35kv vacuum circuit breaker with electric propulsion mechanism
By introducing a chuck assembly and an impact-resistant assembly into a 35kV vacuum circuit breaker with an electric propulsion mechanism, the impact force problem of the contacts during the docking process was solved, achieving stable contact docking and anti-rotation functions, and improving the safety and stability of the equipment.
Patent Information
- Application Number
- CN202520120657.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-20
AI Technical Summary
The plum blossom contacts of traditional 35kV vacuum circuit breakers with electric propulsion mechanisms are subjected to significant impact forces during the docking process, leading to mechanical deformation and fatigue damage. Furthermore, rotation may cause poor contact or docking deviation, affecting the stability and safety of the equipment.
It employs a chuck assembly, a ring spring, and an impact-resistant assembly, including an inner chuck, an outer chuck, an impact-resistant spring, and an anti-rotation rib, to provide cushioning and anti-rotation functions, ensuring the stability and accuracy of contact mating.
It reduces the impact force during contact mating, minimizes mechanical deformation and fatigue damage, prevents contact rotation, and improves the operational stability and safety of the equipment.
Smart Images
Figure CN223771029U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a 35kV vacuum circuit breaker with an electric propulsion mechanism. Background Technology
[0002] The 35kV vacuum circuit breaker with electric propulsion mechanism is an important piece of equipment used in high-voltage power grid systems, primarily for controlling circuit switching and protecting grid safety. This equipment utilizes vacuum arc-extinguishing technology to rapidly extinguish electric arcs, effectively improving breaking performance and operational safety. The 35kV vacuum circuit breaker with electric propulsion mechanism includes a trolley frame, insulating sleeves spaced apart on the trolley frame, contact arms located within the insulating sleeves, and staggered contacts at the front ends of the contact arms. Traditional staggered contact structures, when engaging with stationary contacts under the drive of the electric propulsion mechanism, lack an effective buffer structure, resulting in the contacts being subjected to significant impact forces during engagement. These impact forces can easily cause mechanical deformation and fatigue damage to the contact components. Furthermore, during use, the staggered contacts, due to the lack of anti-rotation design, may rotate during repeated insertions, removals, and engagements, leading to poor contact or engagement deviations, affecting the operational stability of the equipment and posing safety hazards. Improvements and optimizations are made to address these issues. Utility Model Content
[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a 35kV vacuum circuit breaker with an electric propulsion mechanism.
[0004] The technical solution adopted by this utility model of a 35kV vacuum circuit breaker with an electric propulsion mechanism includes: a handcart frame, insulating sleeves spaced apart on the handcart frame, contact arms disposed within the insulating sleeves, and staggered contacts disposed at the front end of the contact arms. The staggered contacts are characterized by: a chuck assembly, contact plates spaced apart around the chuck assembly, a first annular spring and a second annular spring respectively wound around the upper and lower ends of the outer side of the contact plates, and an impact-resistant assembly; the chuck assembly includes an inner chuck, an outer chuck, and a pin connecting the inner and outer chucks; the inner chuck has an inner chuck through-hole; the impact-resistant assembly includes a mating screw and an impact-resistant spring; the mating screw has a smooth screw shaft and a threaded screw portion that can move within the inner chuck through-hole.
[0005] The inner ends of the contact plate are respectively provided with contact plate locking blocks and arc-shaped external protrusions. The contact arm includes a contact arm cylinder. The end of the contact arm cylinder is provided with a contact arm mating end face and a contact arm limiting groove for locking and limiting the contact plate locking block. The contact arm limiting groove is provided with a contact arm anti-rotation rib plate that is parallel to the contact plate and placed between the two contact plates to prevent the stud contact from rotating. The contact arm mating end face is provided with an end face threaded hole for fixing the screw threaded part. The impact-resistant spring is sleeved on the mating screw, with one end abutting against the contact arm mating end face and the other end abutting against the inner chuck.
[0006] The contact arm mating end face is provided with spring positioning grooves at intervals around the arc for positioning the impact-resistant spring, and the spring positioning grooves are provided with threaded holes on the end face.
[0007] The number of the impact-resistant component, the inner chuck through hole, the spring positioning groove, the end face threaded hole, and the contact arm anti-rotation rib are all four.
[0008] The inner chuck is provided with an inner limiting port of the contact plate at intervals around an arc, and the outer chuck is provided with an outer limiting port of the contact plate at intervals around an arc. The inner side of the contact plate is provided with an inner locking slot that engages with the inner limiting port of the contact plate and an outer locking slot that engages with the outer limiting port of the contact plate. The thickness of the inner chuck is greater than the thickness of the outer chuck.
[0009] The width of the contact arm limiting groove is greater than the width of the contact plate block.
[0010] The advantages of this 35kV vacuum circuit breaker with electric propulsion mechanism are as follows: The addition of an anti-impact component provides effective buffering during contact docking, reducing the impact force and thus minimizing mechanical deformation and fatigue damage to the contact components; the addition of anti-rotation ribs prevents the staggered contacts from rotating or shifting during repeated insertion and docking, ensuring the accuracy and stability of the contact docking with the stationary contact and effectively improving safety. Attached Figure Description
[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0012] Figure 1 This is a schematic diagram of the structure of the 35kV vacuum circuit breaker with electric propulsion mechanism of this utility model;
[0013] Figure 2 This is a schematic diagram of the structure of the plum blossom contact of this utility model;
[0014] Figure 3 This is a schematic diagram of the chuck assembly of this utility model;
[0015] Figure 4 This is an exploded view of the impact-resistant component of this utility model;
[0016] Figure 5 This is a schematic diagram of the structure of the contact arm of this utility model;
[0017] Figure 6 This is a schematic diagram of the contact plate of this utility model. Detailed Implementation
[0018] like Figure 1-6 As shown, the 35kV vacuum circuit breaker with electric propulsion mechanism of this utility model includes a handcart frame 1, insulating sleeves 2 spaced apart on the handcart frame 1, contact arms 3 disposed within the insulating sleeves 2, and a sprite-shaped contact 4 disposed at the front end of the contact arms 3. The sprite-shaped contact 4 includes a chuck assembly 6, contact plates 7 spaced apart around the chuck assembly 6, a first annular spring 8 and a second annular spring 9 respectively wound around the upper and lower ends of the outer side of the contact plates 7, and an impact-resistant assembly 10. The disk assembly 6 includes an inner chuck 11, an outer chuck 12, and a pin 13 connecting the inner chuck 11 and the outer chuck 12. The inner chuck 11 has an inner chuck through hole 14. The impact-resistant assembly 10 includes a mating screw 16 and an impact-resistant spring 17. The mating screw 16 has a screw shank portion 18 and a screw thread portion 19 that can move within the inner chuck through hole 14. The inner ends of the contact plate 7 are respectively provided with contact plate blocks 20 and arc-shaped external protrusions 21. The contact arm... 3 includes a contact arm cylinder 23, the end of which is provided with a contact arm mating end face 24 and a contact arm limiting groove 25 for locking and limiting the contact plate block 20. The contact arm limiting groove 25 is provided with a contact arm anti-rotation rib 26, which is parallel to the contact plate 7 and positioned between the two contact plates 7 to prevent the staggered contact 4 from rotating. The contact arm mating end face 24 is provided with an end face threaded hole 28 for fixing the screw threaded portion 19. The impact-resistant spring 17 is sleeved on the mating screw... On the nail 16, one end abuts against the contact arm mating end face 24 and the other end abuts against the inner chuck 11. An anti-impact component 10 is added. During the contact mating process, the anti-impact spring 17 provides effective buffering, reducing the impact force during mating, thereby reducing mechanical deformation and fatigue damage of the contact components. An anti-rotation rib plate 26 is added to the contact arm to prevent the plum blossom contact from rotating or displacing during multiple insertions, removals and mating processes, ensuring the accuracy and stability of the plum blossom contact when mating with the stationary contact, and effectively improving safety.
[0019] The contact arm docking end face 24 is provided with spring positioning grooves 27 at intervals around the arc for positioning the anti-impact spring 17. The spring positioning grooves 27 are provided with end face threaded holes 28 to ensure the correct position of the anti-impact spring 17 during operation, avoid spring displacement or failure, and improve the buffering and rebound effect.
[0020] The number of the impact-resistant component 10, the inner chuck through hole 14, the spring positioning groove 27, the end face threaded hole 28, and the contact arm anti-rotation rib 26 are all 4, to ensure stability during contact.
[0021] The inner chuck 11 has an inner limiting port 31 for the contact plate spaced around an arc, and the outer chuck 12 has an outer limiting port 32 for the contact plate spaced around an arc. The inner side of the contact plate 7 is provided with an inner locking slot 34 that engages with the inner limiting port 31 and an outer locking slot 35 that engages with the outer limiting port 32, forming a multi-locking structure to further improve the connection firmness and prevent the contact plate 7 from loosening or falling off. The thickness of the inner chuck 11 is greater than the thickness of the outer chuck 12, which enhances the structural strength of the inner chuck, improves the resistance to deformation during docking, and provides a guarantee for the long-term stable operation of the equipment.
[0022] The width of the contact arm limiting groove 25 is greater than the width of the contact plate block 20, providing a certain buffer adjustment range.
[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.
Claims
1. A 35kv live push-on vacuum circuit breaker, comprising a handcart frame (1), an insulating sleeve (2) arranged on the handcart frame (1) at intervals, a contact arm (3) arranged in the insulating sleeve (2), and a wrench contact (4) arranged at the front end of the contact arm (3), characterized in that: The plum blossom contact (4) includes a chuck assembly (6), contact plates (7) spaced around the chuck assembly (6), a first annular spring (8) and a second annular spring (9) respectively wound around the upper and lower ends of the outer side of the contact plate (7), and an anti-impact assembly (10). The chuck assembly (6) includes an inner chuck (11), an outer chuck (12), and a pin (13) connecting the inner chuck (11) and the outer chuck (12) together. The inner chuck (11) is provided with an inner chuck through hole (14). The anti-impact assembly (10) includes a mating screw (16) and an anti-impact spring (17). The mating screw (16) is provided with a screw shank portion (18) and a screw thread portion (19) that can move within the inner chuck through hole (14). The inner ends of the contact plate (7) are respectively provided with contact plate locking blocks (20) and arc-shaped external protrusions (21). The contact arm (3) includes a contact arm cylinder (23). The end of the contact arm cylinder (23) is provided with a contact arm docking end face (24) and a contact arm limiting groove (25) for locking and limiting the contact plate locking block (20). The contact arm limiting groove (25) is provided with a contact arm anti-rotation rib (26) that is parallel to the contact plate (7) and placed between the two contact plates (7) to prevent the plum blossom contact (4) from rotating. The contact arm docking end face (24) is provided with an end face thread hole (28) for fixing the screw thread (19). The anti-impact spring (17) is sleeved on the docking screw (16), with one end abutting on the contact arm docking end face (24) and the other end abutting on the inner chuck (11).
2. The 35 kV live electric propulsion mechanism vacuum circuit breaker of claim 1, wherein: The contact arm docking end face (24) is provided with spring positioning grooves (27) for positioning the impact spring (17) at intervals around the arc, and the spring positioning grooves (27) are provided with the end face threaded holes (28).
3. The 35 kV live electrically propelled mechanism vacuum circuit breaker of claim 2, wherein: The number of the impact-resistant component (10), the inner chuck through hole (14), the spring positioning groove (27), the end face threaded hole (28), and the contact arm anti-rotation rib (26) are all 4.
4. The 35kV live electrically propelled mechanism vacuum circuit breaker of claim 1, wherein: The inner chuck (11) is provided with an inner limiting port (31) of the contact plate at intervals around an arc, and the outer chuck (12) is provided with an outer limiting port (32) of the contact plate at intervals around an arc. The inner side of the contact plate (7) is provided with an inner locking port (34) of the contact plate that engages with the inner limiting port (31) of the contact plate and an outer locking port (35) of the contact plate that engages with the outer limiting port (32) of the contact plate. The thickness of the inner chuck (11) is greater than the thickness of the outer chuck (12).
5. The 35kV live electrically propelled mechanism vacuum circuit breaker of claim 1, wherein: The width of the contact arm limiting groove (25) is greater than the width of the contact plate block (20).