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CN-121983460-A - Solid-sealed pole type permanent magnet rapid breaking high-voltage vacuum circuit breaker

CN121983460ACN 121983460 ACN121983460 ACN 121983460ACN-121983460-A

Abstract

The invention provides a solid-sealed pole type permanent magnet rapid breaking high-voltage vacuum circuit breaker, which belongs to the field of circuit breakers and comprises a permanent magnet operating mechanism, an insulating pull rod unit, an insulating cylinder, an adjusting rod, a vacuum arc-extinguishing chamber and a support, wherein the insulating cylinder and the permanent magnet operating mechanism are both arranged on the support, the vacuum arc-extinguishing chamber is fixedly sealed in the insulating cylinder, the insulating pull rod unit is arranged in the insulating cylinder in a vertically movable manner, the upper end of the insulating pull rod unit is connected with the permanent magnet operating mechanism through the adjusting rod, and the lower end of the insulating pull rod unit is connected with a moving contact of the vacuum arc-extinguishing chamber. The circuit breaker insulation performance is lower among the aim at solving prior art's problem. The circuit breaker has the technical effect that the circuit breaker has higher insulating property.

Inventors

  • LIU ZHENHUA
  • RUI ZUCUN
  • ZHAO CHANGSHUN
  • Che Wanda
  • MENG TAO
  • WU HONGHUI

Assignees

  • 双杰电气合肥有限公司

Dates

Publication Date
20260505
Application Date
20260129

Claims (10)

  1. 1. The permanent magnet quick breaking high-voltage vacuum circuit breaker is characterized by comprising a permanent magnet operating mechanism (1), an insulating pull rod unit (2), an insulating cylinder (3), an adjusting rod (4), a vacuum arc extinguishing chamber (5) and a bracket (6); the insulating cylinder (3) and the permanent magnet operating mechanism (1) are both arranged on the bracket (6), and the vacuum arc-extinguishing chamber (5) is fixedly sealed in the insulating cylinder (3); the insulation pull rod unit (2) is arranged in the insulation cylinder (3) in a vertically movable mode, the upper end of the insulation pull rod unit (2) is connected with the permanent magnet operating mechanism (1) through the adjusting rod (4), and the lower end of the insulation pull rod unit (2) is connected with the moving contact (51) of the vacuum arc extinguishing chamber (5).
  2. 2. The solid-sealed pole type permanent magnet rapid breaking high-voltage vacuum circuit breaker according to claim 1, further comprising umbrella skirts (31), wherein a plurality of umbrella skirts (31) are integrally formed on the outer side wall of the insulating cylinder (3), and the umbrella skirts (31) are arranged at intervals from top to bottom.
  3. 3. The solid-sealed pole type permanent magnet rapid breaking high-voltage vacuum circuit breaker according to claim 1, further comprising an incoming and outgoing line copper bar (7) and a soft connection (71), wherein the incoming and outgoing line copper bar (7) is arranged on the insulating cylinder (3) in a penetrating manner and is fixedly connected with the insulating cylinder (3), one end of the soft connection (71) is connected with the incoming and outgoing line copper bar (7), and the other end of the soft connection (71) is connected with a moving contact (51) of the vacuum arc-extinguishing chamber (5).
  4. 4. A fast breaking high voltage vacuum circuit breaker of permanent magnet of solid-sealed pole type according to claim 3, characterized by further comprising a first wire passing tube (72) and a second wire passing tube (73), wherein the first wire passing tube (72) and the second wire passing tube (73) are respectively integrally formed at two sides of the insulating cylinder (3), and the first wire passing tube (72) and the second wire passing tube (73) are both communicated with the inner cavity of the insulating cylinder (3); First upper plate (721) and first hypoplastron (722) are arranged in interval in first spool (72), first upper plate (721) with first hypoplastron (722) are located respectively business turn over line copper bar (7) both sides and all with business turn over line copper bar (7) fixed connection, second spool (73) are arranged in interval in second upper plate (731) and second hypoplastron (732), second upper plate (731) with second hypoplastron (732) are located respectively business turn over line copper bar (7) both sides and all with business turn over line copper bar (7) fixed connection.
  5. 5. The permanent magnet quick breaking high-voltage vacuum circuit breaker with the solid-sealed pole type according to claim 1, characterized in that the permanent magnet operating mechanism (1) comprises a supporting seat (11), an outer magnetic yoke (12), an electromagnetic coil (13), a static iron core (14), a permanent magnet (15), a movable iron core shaft (16), a movable iron core (17) and a breaking spring (18); The support seat (11) is installed on the support (6), the outer magnet yoke (12) is installed on the support seat (11), an electromagnetic coil (13), a static iron core (14) and a permanent magnet (15) are installed in an inner cavity of the outer magnet yoke (12), a movable iron core shaft (16) is inserted in the inner cavity of the outer magnet yoke (12) in a vertically sliding mode, a movable iron core (17) is installed on the movable iron core shaft (16), the lower end of the movable iron core shaft (16) penetrates through the outer magnet yoke (12) and then is connected with the upper end of the adjusting rod (4), a brake separating spring (18) is installed between the movable iron core (17) and the support seat (11), the movable iron core shaft (16) can slide downwards to compress the brake separating spring (18), and the movable iron core shaft (16), the movable iron core shaft (17), the outer magnet yoke (12) and the static iron core (14) are made of magnetic materials; The insulation pull rod unit (2) comprises an insulation pull rod (21), an arc-extinguishing chamber connecting rod (22) and an over-travel spring (23), wherein the upper end of the insulation pull rod (21) is connected with the lower end of the adjusting rod (4), a containing cavity is formed in the lower end of the insulation pull rod (21), the upper end of the arc-extinguishing chamber connecting rod (22) is slidably inserted into the containing cavity, the lower end of the arc-extinguishing chamber connecting rod (22) is connected with a moving contact (51) of the vacuum arc-extinguishing chamber (5), the over-travel spring (23) is installed in the containing cavity, the upper end of the over-travel spring (23) is in butt joint with the bottom wall of the containing cavity, and the lower end of the over-travel spring (23) is in butt joint with the arc-extinguishing chamber connecting rod (22).
  6. 6. The fast breaking high voltage vacuum circuit breaker with solid-sealed pole type permanent magnet according to claim 5, characterized in that the overtravel of the circuit breaker is 2mm-2.5mm, the initial pressure of the overtravel spring (23) is 2300N, and the initial pressure of the breaking spring (18) is 800N.
  7. 7. The fast breaking high-voltage vacuum circuit breaker according to claim 5, wherein the insulation pull rod unit (2) further comprises an insert (211) and a resisting piece (212), the insert (211) is arranged in the accommodating cavity of the insulation pull rod (21), the upper end of the arc-extinguishing chamber connecting rod (22) is slidably inserted into the inner cavity of the insert (211), the resisting piece (212) is arranged at the lower end of the insert (211), a baffle (221) is integrally formed on the arc-extinguishing chamber connecting rod (22), the baffle (221) is arranged between the over-travel spring (23) and the resisting piece (212), and two ends of the over-travel spring (23) are respectively abutted against the baffle (221) and the bottom wall of the inner cavity of the insert (211).
  8. 8. The solid-sealed pole type permanent magnet rapid breaking high-voltage vacuum circuit breaker according to claim 7, further comprising an adjusting piece (41), a first thread (42) and a second thread (43), wherein the adjusting piece (41) is integrally formed in the middle of the adjusting rod (4), the first thread (42) and the second thread (43) are integrally formed on the adjusting rod (4) and the adjusting piece (41) is located between the first thread (42) and the second thread (43), the rotation direction of the first thread (42) is opposite to the rotation direction of the second thread (43), the first thread (42) is used for being in threaded connection with the movable iron core shaft (16), and the second thread (43) is used for being in threaded connection with the insulating pull rod (21).
  9. 9. The solid-sealed pole type permanent magnet rapid breaking high-voltage vacuum circuit breaker according to claim 5, further comprising a manual brake separating shaft (8), a manual brake separating crank arm (81) and a shaft crank arm (82), wherein the manual brake separating shaft (8) is connected with the support (6) through a shaft seat (62), the shaft crank arm (82) is fixedly connected to the manual brake separating shaft (8), the shaft crank arm (82) is connected with the moving iron core shaft (16) through a pin shaft, one end of the manual brake separating crank arm (81) is fixedly connected with the manual brake separating shaft (8), and the other end of the manual brake separating crank arm (81) is connected with the manual brake separating mechanism.
  10. 10. The fast breaking high voltage vacuum circuit breaker of solid pole type permanent magnet according to claim 5, characterized in that the moving iron core shaft (16), the moving iron core (17), the outer yoke (12) and the static iron core (14) are all made of electrical pure iron.

Description

Solid-sealed pole type permanent magnet rapid breaking high-voltage vacuum circuit breaker Technical Field The invention relates to the technical field of circuit breakers, in particular to a solid-sealed pole type permanent magnet rapid breaking high-voltage vacuum circuit breaker. Background The vacuum circuit breaker is used as power switching equipment widely applied in a power distribution network, and the arc extinguishing medium and the insulating medium of a contact gap after arc extinction are both in high vacuum, so that the vacuum circuit breaker has the advantages of small volume, light weight, frequent operation of adaptation, no need of maintenance for arc extinction and the like. The circuit breaker is widely applied to the scenes of industrial and mining enterprises, power plants, substations and the like, can realize the protection and control of high-voltage electric equipment, is particularly suitable for use places without oil, less maintenance and frequent operation, and meets the safe and stable operation requirements of a power distribution network. Along with the improvement of the requirement of a medium-voltage power system on the power supply reliability, the application of the fast breaking permanent magnet circuit breaker in a medium-voltage overhead line power grid is important. At present, the circuit breaker in the industry mainly adopts a magnetic control switch and adopts soft magnetic materials to realize the rapid breaking function. However, although the soft magnetic material has high magnetic permeability, the soft magnetic material also has the defects of weak anti-interference capability and easiness in being influenced by an external magnetic field, so that the circuit breaker has demagnetizing hidden danger, the stability of the quick breaking performance and the operation safety of equipment are seriously influenced, and the use requirement of a medium-voltage power grid on the high reliability of the quick breaking circuit breaker cannot be fully met. In addition, the insulating structure of the existing vacuum circuit breaker is mainly used for SF6 type inflatable cabinets, SF6 gas is used as main external insulating medium, the insulating performance of the circuit breaker is low, the gas insulation static distance and the climbing distance of insulating pieces are small, the external insulating performance mainly depends on the high insulating capability of SF6 gas, and the insulating structure cannot be applied to cabinet type cabinets with relatively low insulating performance of insulating mediums such as normal-pressure sealed ring main units and air insulating switch cabinets. Disclosure of Invention The invention provides a solid-sealed pole type permanent magnet rapid breaking high-voltage vacuum circuit breaker, which is used for solving the defect of lower insulation performance of the circuit breaker in the prior art and realizing higher insulation performance. The invention provides a solid-sealed pole type permanent magnet rapid breaking high-voltage vacuum circuit breaker, which comprises a permanent magnet operating mechanism, an insulating pull rod unit, an insulating cylinder, an adjusting rod, a vacuum arc-extinguishing chamber and a bracket, wherein the permanent magnet operating mechanism is arranged on the insulating cylinder; the insulation cylinder and the permanent magnet operating mechanism are both arranged on the bracket, and the vacuum arc-extinguishing chamber is fixedly sealed in the insulation cylinder; the insulating pull rod unit is arranged in the insulating cylinder in a vertically movable mode, the upper end of the insulating pull rod unit is connected with the permanent magnet operating mechanism through the adjusting rod, and the lower end of the insulating pull rod unit is connected with the moving contact of the vacuum arc-extinguishing chamber. In addition, the solid-sealed pole type permanent magnet rapid breaking high-voltage vacuum circuit breaker can also have the following additional technical characteristics: in some embodiments of the present invention, the insulating tube further comprises an umbrella skirt, wherein the outer side wall of the insulating tube is integrally formed with a plurality of umbrella skirts, and the umbrella skirts are arranged at intervals from top to bottom. In some embodiments of the invention, the vacuum arc extinguishing chamber further comprises an inlet and outlet copper bar and a flexible connection, wherein the inlet and outlet copper bar is arranged on the insulating cylinder in a penetrating way and is fixedly connected with the insulating cylinder, one end of the flexible connection is connected with the inlet and outlet copper bar, and the other end of the flexible connection is connected with the movable contact of the vacuum arc extinguishing chamber. In some embodiments of the present invention, the insulation tube further comprises a first wire passing tube and a second wir