An AC tank circuit breaker without pot-type insulator
By abolishing the basin insulator and adopting the design of structures such as insulating pull rods, pressure equalization shielding covers and arc extinguishing chambers, the problem of high discharge failure rate of high-voltage AC sulfur hexafluoride tank circuit breakers is solved, and the circuit breakers are easily cleaned, low failure rate and high insulation performance are achieved, and the corresponding high-voltage AC capability requirements of the 550kV power system are met.
Patent Information
- Application Number
- CN202421429031.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-21
AI Technical Summary
The existing high-voltage AC sulfur hexafluoride tank circuit breakers are difficult to clean the basin insulators, resulting in an increase in discharge failure rate, making it difficult to meet the corresponding high-voltage AC capability requirements of the 550kV power system.
An alternating tank circuit breaker that eliminates basin insulators is designed, and the insulating pull rod, pressure equalization shield cover and arc extinguishing chamber in the metal shell is used to drive the arc extinguishing chamber movement and the fracture structure of the pressure equalization shield cover to achieve the opening and closing action, and the horizontal basin insulator is cancelled.
The cancellation of the basin insulator makes the circuit breaker easy to clean, reduces the discharge failure rate, improves the support structure and electric field structure of the equipment, improves the insulation performance, and meets the corresponding high-voltage AC capability requirements of the 550kV power system.
Smart Images
Figure CN222720292U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-voltage tank type circuit breakers and is mainly suitable for ultra-high voltage AC tank type circuit breakers. Background Art
[0002] With the rapid development of my country's economy, power equipment has been widely used. High-voltage AC sulfur hexafluoride tank circuit breakers are important equipment used to switch normal lines or faulty lines in power systems. At present, most high-voltage AC sulfur hexafluoride tank circuit breakers have basin insulators for support and fixing. Due to the defects of the basin insulators themselves and the powder impurities attached to the basin insulators inside the tank circuit breakers, which are difficult to clean, the discharge failure rate of the tank circuit breaker increases, making it difficult to meet the requirements of the 550kV power system for high-voltage AC corresponding capacity. Summary of the invention
[0003] The utility model aims at the problems existing in the background technology and provides an AC tank type circuit breaker without pot type insulators, thereby solving the technical problem in the prior art that the discharge failure rate increases due to difficulty in cleaning.
[0004] The purpose of the utility model is achieved through the following technical solutions: an AC tank circuit breaker that eliminates pot-type insulators, including a metal shell, inside the metal shell, from one end to the other end, an insulating pull rod, a voltage-equalizing shielding cover I, an arc extinguishing chamber I, a voltage-equalizing shielding cover II, an arc extinguishing chamber II, a voltage-equalizing shielding cover III, a connecting seat, a voltage-equalizing shielding cover IV, and a supporting insulating cylinder II are arranged in sequence; the insulating pull rod is connected to the arc extinguishing chamber I and the arc extinguishing chamber II, driving the arc extinguishing chamber I and the arc extinguishing chamber II to move, and the arc extinguishing chamber I is connected in series with the arc extinguishing chamber II; a fracture structure is arranged inside the voltage-equalizing shielding cover II and the voltage-equalizing shielding cover III, and each fracture structure is connected in parallel with an independent fracture voltage-equalizing capacitor.
[0005] Preferably, the insulating pull rod is covered with a supporting insulating tube I.
[0006] Preferably, the insulating pull rod drives the arc extinguishing chamber I and the arc extinguishing chamber II to perform linear motion, and realizes the opening and closing actions with the fractures in the voltage-equalizing shielding cover II and the voltage-equalizing shielding cover III.
[0007] Preferably, a connecting conductor I and a connecting conductor II are provided in the metal shell, one end of the connecting conductor I and the connecting conductor II are exposed outside the metal shell and connected to the external structure, the other end of the connecting conductor I is connected to the internal fracture of the voltage-equalizing shielding cover I, and the connecting conductor II is connected to the internal fracture of the voltage-equalizing shielding cover IV.
[0008] The beneficial effects of the utility model are:
[0009] 1. Eliminate the horizontal pot insulator to make the circuit breaker easier to clean and reduce the discharge failure rate.
[0010] 2. Improve the supporting structure of the circuit breaker to make the equipment safer and more reliable.
[0011] 3. Optimize the electric field structure of the circuit breaker and improve the insulation performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION
[0013] An AC tank circuit breaker without a pot-type insulator includes a metal shell 1, inside which, from one end to the other, are sequentially provided with an insulating pull rod 4, a voltage-equalizing shielding cover I6-1, an arc extinguishing chamber I2-1, a voltage-equalizing shielding cover II6-2, an arc extinguishing chamber II2-2, a voltage-equalizing shielding cover III6-3, a connecting seat 7, a voltage-equalizing shielding cover IV6-4, and a supporting insulating cylinder II8. The insulating pull rod 4 is connected to the arc extinguishing chamber I2-1 and the arc extinguishing chamber II2-2, driving the arc extinguishing chamber I2-1 and the arc extinguishing chamber II2-2 to move, and the arc extinguishing chamber I2-1 is connected in series with the arc extinguishing chamber II2-2. A fracture structure is provided inside the voltage-equalizing shielding cover II6-2 and the voltage-equalizing shielding cover III6-3, and each fracture structure is connected in parallel with an independent fracture-equalizing capacitor 5, so as to ensure that the voltages borne by each fracture in the opening position are close to the same, and the insulation performance to the ground and the fracture insulation performance can be improved.
[0014] Preferably, the insulating pull rod 4 is covered with a supporting insulating cylinder I3. The supporting insulating cylinder I3 and the supporting insulating cylinder II8 play a supporting and fixing role, ensuring its supporting strength and reliable performance.
[0015] Preferably, the insulating pull rod 4 drives the arc extinguishing chamber I2-1 and the arc extinguishing chamber II2-2 to perform linear motion, and realizes the opening and closing actions with the breaks in the voltage-equalizing shielding cover II6-2 and the voltage-equalizing shielding cover III6-3.
[0016] The metal shell 1 is provided with a connecting conductor I9-1 and a connecting conductor II9-2. One end of the connecting conductor I9-1 and the connecting conductor II9-2 is exposed outside the metal shell 1 and connected to the external structure. The other end of the connecting conductor I9-1 is connected to the internal fracture of the voltage-equalizing shielding cover I6-1, and the connecting conductor II9-2 is connected to the internal fracture of the voltage-equalizing shielding cover IV6-4.
Claims
1. An AC tank circuit breaker without pot-type insulators, characterized in that: The invention comprises a metal shell (1), wherein the metal shell (1) is provided with an insulating pull rod (4), a voltage-equalizing shielding cover I (6-1), an arc extinguishing chamber I (2-1), a voltage-equalizing shielding cover II (6-2), an arc extinguishing chamber II (2-2), a voltage-equalizing shielding cover III (6-3), a connecting seat (7), a voltage-equalizing shielding cover IV (6-4), and a supporting insulating tube II (8) in sequence from one end to the other end; the insulating pull rod (4) is connected to the arc extinguishing chamber I (2-1) and the arc extinguishing chamber II (2-2), driving the arc extinguishing chamber I (2-1) and the arc extinguishing chamber II (2-2) to move, and the arc extinguishing chamber I (2-1) and the arc extinguishing chamber II (2-2) are connected in series; a fracture structure is provided inside the voltage-equalizing shielding cover II (6-2) and the voltage-equalizing shielding cover III (6-3), and each fracture structure is connected in parallel with an independent fracture voltage-equalizing capacitor (5).
2. The AC tank type circuit breaker without pot type insulator according to claim 1, characterized in that: The insulating pull rod (4) is covered with a supporting insulating tube I (3).
3. The AC tank type circuit breaker without pot type insulator according to claim 1, characterized in that: The insulating pull rod (4) drives the arc extinguishing chamber I (2-1) and the arc extinguishing chamber II (2-2) to perform linear motion, and realizes the opening and closing actions with the fractures in the voltage-equalizing shielding cover II (6-2) and the voltage-equalizing shielding cover III (6-3).
4. The AC tank type circuit breaker without pot type insulator according to claim 1, characterized in that: The metal shell (1) is provided with a connecting conductor I (9-1) and a connecting conductor II (9-2). One end of the connecting conductor I (9-1) and the connecting conductor II (9-2) is exposed outside the metal shell (1) and connected to the external structure. The other end of the connecting conductor I (9-1) is connected to the internal fracture of the voltage-equalizing shielding cover I (6-1), and the connecting conductor II (9-2) is connected to the internal fracture of the voltage-equalizing shielding cover IV (6-4).