Air insulation disconnecting switch and circuit breaker integrated installation device for ring main unit
By designing an integrated installation device for air insulated isolation switch and circuit breaker in the ring grid cabinet, the problems of the installation of isolation switch and circuit breaker and the aging of insulation materials in traditional designs are solved, and the compactness, operating efficiency and electrical safety of the equipment are improved.
Patent Information
- Application Number
- CN202420581861.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-03-25
AI Technical Summary
In traditional ring network cabinets, the isolating switch and circuit breaker are installed separately. The sealed epoxy resin material may age and crack during long-term operation, affecting the electrical insulation effect, resulting in cumbersome installation and insufficient electrical safety.
An integrated installation device for air-insulated isolation switch and circuit breaker for ring network cabinets is designed, using the main insulating plate of SMC material and the interphase insulating plate of transparent PC material to increase creepage distance, and the integrated isolation switch and circuit breaker are integrated on the same frame.
It realizes functional integration, simplifies installation, reduces failure rate, improves electrical safety and maintainability, while reducing production costs and improving market competitiveness.
Smart Images
Figure CN222691099U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of isolating switches and circuit breakers, in particular to an integrated installation device of an air-insulated isolating switch and a circuit breaker for a ring network cabinet. Background Art
[0002] In traditional ring main units, disconnectors and circuit breakers are usually installed separately, and the insulating parts are mostly made of sealed epoxy resin materials. However, this design method not only makes the installation process cumbersome, but also the sealed epoxy resin material may age and crack during long-term operation, affecting the electrical insulation effect. Therefore, it is necessary to develop a new type of integrated installation device for disconnectors and circuit breakers, and explore new insulating materials to improve the compactness, operating efficiency and electrical safety of the equipment. Summary of the invention
[0003] The main purpose of the utility model is to solve the problems existing in the above-mentioned prior art and to provide an integrated installation device of an air-insulated isolating switch and a circuit breaker for a ring network cabinet.
[0004] The specific scheme of the utility model is: an integrated installation device of an air-insulated isolating switch and a circuit breaker for a ring network cabinet, comprising a frame, the frame being connected by a front mounting plate, a rear mounting plate, a left mounting plate and a right mounting plate, an isolating switch installation area being provided at the lower end between the left mounting plate and the right mounting plate, the front mounting plate and the rear mounting plate both being insulating plates, a circuit breaker body being provided between the front mounting plate and the rear mounting plate, a circuit breaker operating mechanism being provided at the upper end of the right mounting plate, a driving shaft of the circuit breaker operating mechanism being connected to the circuit breaker body; an isolating switch being provided in the isolating switch installation area, the isolating switch comprising three groups of isolating knife switches, the three groups of isolating knife switches being connected to an isolating switch transmission shaft at the same time, an isolating switch operating mechanism being provided at the lower end of the right mounting plate, the isolating switch operating mechanism being connected to the isolating switch transmission shaft, an interphase insulating plate being provided on each side of the three groups of isolating knife switches, and the upper end of each interphase insulating plate being fixedly connected to the front mounting plate and the rear mounting plate.
[0005] Furthermore, creepage groups are provided on the surfaces of the front mounting plate and the rear mounting plate to increase the creepage distance.
[0006] Furthermore, the front mounting plate and the rear mounting plate are made of SMC material, and the interphase insulating plate is made of transparent PC material.
[0007] Furthermore, mounting grooves are provided at the bottom ends of the front mounting plate and the rear mounting plate corresponding to the respective interphase insulating plates.
[0008] Furthermore, a vacuum interrupter is provided at the lower end of the circuit breaker body corresponding to each isolating switch, and an upper contact matching the corresponding isolating switch is provided at the bottom end of each vacuum interrupter.
[0009] Furthermore, a connecting beam is provided between the left mounting plate and the right mounting plate, and a grounding contact is provided on the connecting beam corresponding to each isolating knife switch.
[0010] Compared with the prior art, the utility model has the following advantages: 1. Through the integrated design, the isolating switch and the circuit breaker are tightly integrated on the same frame, which realizes the integration of functions and simplifies the installation, reduces the equipment footprint, improves the space utilization, simplifies the electrical connection, reduces the failure rate, and improves the overall performance of the equipment;
[0011] 2. The front and rear main insulation plates adopt SMC materials with higher electrical insulation performance, and creepage groups are designed on the surface of the insulation parts to increase the creepage distance, which can effectively prevent the occurrence of current leakage and breakdown, and ensure the electrical safety of the equipment;
[0012] 3. The SMC material of the main insulation board has excellent mechanical properties and is formed by die-casting process. It can withstand various forces and vibrations during the operation of the equipment and maintain the stability and integrity of the structure;
[0013] 4. The interphase insulation board is made of PC transparent material, which has both high insulation performance and high transparency, making it easy to observe and monitor the operating status of the three-phase disconnector and the three-phase circuit breaker, thus improving the maintainability of the equipment;
[0014] 5. Compared with epoxy resin materials and production process, the cost of SMC materials and PC transparent materials is lower than that of epoxy resin, and the production process is simple and the production cost is low, which meets the requirements of sustainable cost reduction and improved market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional view of the structure of the utility model;
[0016] Figure 2 yes Figure 1 The main view of
[0017] Figure 3 yes Figure 2 AA view;
[0018] Figure 4 It is a three-dimensional schematic diagram of the frame of the utility model;
[0019] Figure 5 yes Figure 4 The main view of
[0020] In the figure: 1. drive shaft; 2. front mounting plate; 3. rear mounting plate; 4. right mounting plate; 5. left mounting plate; 6. grounding contact; 7. isolating knife switch; 8. interphase insulation plate; 9. circuit breaker operating mechanism; 10. isolating switch operating mechanism; 11. mounting groove; 12. vacuum arc extinguishing chamber; 13. upper contact; 14. connecting beam. DETAILED DESCRIPTION
[0021] See also Figure 1-5 This embodiment is an integrated installation device of an air-insulated isolating switch and a circuit breaker for a ring network cabinet, comprising a frame, the frame being connected by a front mounting plate 2, a rear mounting plate 3, a left mounting plate 5 and a right mounting plate 4, the left mounting plate 5 and the right mounting plate 4 being made of high-strength carbon steel, the left and right sides of the front mounting plate 2 and the rear mounting plate 3 being mounted on the upper ends of the left mounting plate 5 and the right mounting plate 4, the lower end between the left mounting plate 5 and the right mounting plate 4 being provided with an isolating switch installation area, the front mounting plate 2 and the rear mounting plate 3 being both made of insulating plates, the circuit breaker body being installed between the front mounting plate 2 and the rear mounting plate 3, The upper end of the right mounting plate 4 is provided with a circuit breaker operating mechanism 9, and the driving shaft 1 of the circuit breaker operating mechanism 9 is connected to the circuit breaker body; the isolating switch is installed in the isolating switch installation area, and the isolating switch includes three groups of isolating knife switches 7, and the three groups of isolating knife switches 7 are simultaneously connected to an isolating switch transmission shaft, and the lower end of the right mounting plate 4 is provided with an isolating switch operating mechanism 10, and the isolating switch operating mechanism 10 is connected to the isolating switch transmission shaft, and an interphase insulating plate 8 is installed on both sides of the three groups of isolating knife switches 7, and the upper end of each interphase insulating plate 8 is fixedly connected to the front mounting plate 2 and the rear mounting plate 3. Further, an upper wire entry hole is provided on the surface of the front mounting plate 2 and the rear mounting plate 3 corresponding to each isolating knife switch 7, and the three upper wire entry seats of the circuit breaker body pass through the corresponding upper wire entry holes to connect the high-voltage incoming wires.
[0022] Furthermore, creepage groups are provided on the surfaces of the front mounting plate 2 and the rear mounting plate 3 to increase the creepage distance.
[0023] Furthermore, the front mounting plate 2 and the rear mounting plate 3 are made of SMC material, and the interphase insulating plate 8 is made of transparent PC material.
[0024] Furthermore, mounting grooves 11 are provided at the bottom ends of the front mounting plate 2 and the rear mounting plate 3 corresponding to each interphase insulating plate 8 .
[0025] Furthermore, a vacuum interrupter 12 is provided at the lower end of the circuit breaker body corresponding to each isolating switch 7 , and an upper contact 13 matching the corresponding isolating switch 7 is provided at the bottom end of each vacuum interrupter 12 .
[0026] Furthermore, a connecting beam 14 is provided between the left mounting plate 5 and the right mounting plate 4 , and a grounding contact 6 is provided on the connecting beam 14 corresponding to each isolating switch 7 .
Claims
1. An integrated installation device for an air-insulated isolating switch and a circuit breaker for a ring main unit, comprising a frame, characterized in that: The frame is composed of a front mounting plate, a rear mounting plate, a left mounting plate and a right mounting plate. An isolating switch installation area is provided at the lower end between the left mounting plate and the right mounting plate. Both the front mounting plate and the rear mounting plate adopt insulating plates. A circuit breaker body is installed between the front mounting plate and the rear mounting plate. A circuit breaker operating mechanism is installed at the upper end of the right mounting plate. The driving shaft of the circuit breaker operating mechanism is connected to the circuit breaker body. An isolating switch is installed in the isolating switch installation area. The isolating switch includes three groups of isolating knife switches. The three groups of isolating knife switches are simultaneously connected to an isolating switch transmission shaft. An isolating switch operating mechanism is installed at the lower end of the right mounting plate. The isolating switch operating mechanism is connected to the isolating switch transmission shaft. An interphase insulating plate is installed on each side of the three groups of isolating knife switches. The upper end of each interphase insulating plate is fixedly connected to the front mounting plate and the rear mounting plate.
2. The integrated installation device of air-insulated isolating switch and circuit breaker for ring main unit according to claim 1 is characterized in that: The surfaces of the front mounting plate and the rear mounting plate are both provided with creepage groups to increase the creepage distance.
3. The integrated installation device of air-insulated isolating switch and circuit breaker for ring main unit according to claim 1, characterized in that: The front mounting plate and the rear mounting plate are made of SMC material, and the interphase insulating plate is made of transparent PC material.
4. The integrated installation device of air-insulated isolating switch and circuit breaker for ring main unit according to claim 1, characterized in that: The bottom ends of the front mounting plate and the rear mounting plate are provided with mounting grooves corresponding to the interphase insulating plates.
5. The integrated installation device of air-insulated isolating switch and circuit breaker for ring main unit according to claim 1, characterized in that: A vacuum interrupter is provided at the lower end of the circuit breaker body corresponding to each isolating switch, and an upper contact matching the corresponding isolating switch is provided at the bottom end of each vacuum interrupter.
6. The integrated installation device of air-insulated isolating switch and circuit breaker for ring main unit according to claim 1, characterized in that: A connecting beam is arranged between the left mounting plate and the right mounting plate, and a grounding contact is arranged on the connecting beam corresponding to each isolating knife switch.