Search

CN-121983456-A - Oil immersed circuit breaker

CN121983456ACN 121983456 ACN121983456 ACN 121983456ACN-121983456-A

Abstract

The oil immersed circuit breaker comprises a main insulation base, an opening and closing gate structure, a fixed contact charging assembly, a high-current tripping assembly, a moving contact charging assembly and an alarm mechanism, wherein a tripping bracket is rotatably connected to the main insulation base, a movable end of the fixed contact charging assembly is tilted when heated to drive the tripping bracket to swing, the moving contact charging assembly is movably arranged on the main insulation base, the opening and closing gate structure is provided with an opening and closing chuck, the opening and closing gate structure is connected with the moving contact charging assembly and is used for driving the moving contact charging assembly to move to drive the moving contact charging assembly to contact or separate from the fixed contact charging assembly, the opening and closing chuck is clamped with the tripping bracket when in switching on, the moving contact charging assembly is kept in contact with the fixed contact charging assembly, a lifting vertical rod is abutted against the tripping bracket, the opening and closing chuck and the lifting vertical rod are separated from the tripping bracket when in switching off, and the alarm mechanism gives out an alarm. The scheme solves the problem that the opening mechanism and the alarm mechanism of the existing circuit breaker are not coordinated.

Inventors

  • SHI ZEDONG
  • WANG DONGFENG

Assignees

  • 佛山市特创斯电气有限公司

Dates

Publication Date
20260505
Application Date
20260129

Claims (10)

  1. 1. The oil immersed circuit breaker is characterized by comprising a main insulation base, an opening and closing gate structure, a static contact electrification component, a high-current tripping component, a moving contact electrification component and an alarm mechanism; The high-current tripping assembly is provided with a tripping bracket which is rotatably connected with the main insulation base, the fixed end of the static contact charging assembly is arranged on the main insulation base, and the movable end of the static contact charging assembly is connected with the tripping bracket; The movable contact charging assembly is movably arranged on the main insulation base, the opening and closing clamp head is arranged on the opening and closing structure, the opening and closing structure is connected with the movable contact charging assembly and is used for driving the movable contact charging assembly to move so as to drive the movable contact charging assembly to contact or be separated from the fixed contact charging assembly, and the alarm mechanism is provided with a lifting vertical rod; When in closing, the opening and closing clamp head is clamped on the tripping bracket to enable the moving contact charging assembly to keep contact with the fixed contact charging assembly; when the brake is released, the brake release chuck and the lifting vertical rod are separated from the tripping bracket, and the alarm mechanism gives an alarm.
  2. 2. The oil-immersed circuit breaker according to claim 1, wherein the opening and closing brake structure comprises a plurality of connecting rotating mechanisms and a circuit breaker handle; The movable contact electrification assembly comprises an opening and closing insulating bracket and a movable contact; the movable contact is connected to the front of the opening and closing insulating support, the multi-piece connecting rotating mechanism is arranged on the opening and closing insulating support, and the tripping support is provided with a tripping surface at the rear of the opening and closing insulating support; The multi-piece connecting rotating mechanism comprises a first supporting rotating shaft, a second supporting rotating shaft, a third supporting rotating shaft, a fourth supporting rotating shaft and a plurality of sheet structures; The first support rotating shaft, the third support rotating shaft and the second support rotating shaft are sequentially distributed in sequence from front to back; the sheet structure is divided into an opening and closing brake push-pull sheet, a rear supporting sheet, an upper swinging bent sheet, a lower swinging bent sheet, an opening and closing clamping head, a direct connection sheet and a front supporting sheet; The front of the opening and closing brake push-pull sheet is rotatably connected with one end of the straight connecting sheet, the other end of the straight connecting sheet is rotatably connected with one end of the front supporting sheet, the other end of the front supporting sheet is rotatably connected with the third supporting rotating shaft, and the third supporting rotating shaft is connected with the opening and closing insulating bracket; The back of the opening and closing gate push-pull sheet is rotatably connected with one end of the lower swing bending sheet and one end of the upper swing bending sheet, the other end of the lower swing bending sheet is rotatably connected with one end of the rear supporting sheet, the other end of the rear supporting sheet is rotatably connected with the second supporting rotating shaft, the second supporting rotating shaft is rotatably connected with the opening and closing insulating bracket, the other end of the upper swing bending sheet is rotatably connected with the opening and closing clamping head, and the opening and closing clamping head is rotatably connected between the two ends of the rear supporting sheet through a gate closing shaft; the circuit breaker handle drives the switching gate push-pull sheet to rotate clockwise around the first supporting rotating shaft, the switching gate push-pull sheet drives the direct connection sheet to rotate clockwise around the fourth supporting rotating shaft, the front supporting sheet moves downwards relative to the switching gate push-pull sheet, the third supporting rotating shaft drives the movable contact of the switching insulating support to move downwards, the upper swinging bent sheet drives the switching gate clamping head to rotate anticlockwise around the closing shaft, the lower swinging bent sheet drives the rear supporting sheet to rotate anticlockwise around the second supporting rotating shaft, the clamping part is overturned anticlockwise to be positioned behind the rear supporting sheet, and the clamping part is overturned to be clamped on a tripping surface, so that the position of the movable contact is fixed.
  3. 3. The oil immersed circuit breaker according to claim 2, wherein the moving contact charging assembly comprises an opening and closing insulating bracket, a moving contact limiting assembly and a moving contact; the opening and closing insulating support is provided with a movable contact mounting groove, and a card pressing block is arranged at an opening above the movable contact mounting groove; the movable contact limiting assembly comprises a U-shaped base, a movable contact elastic piece and a spring card; The U-shaped base is movably limited in the movable contact mounting groove, the lower part of the U-shaped base extends out of the opening below the movable contact mounting groove and is connected with the movable contact, one end of the movable contact elastic piece is contacted with the U-shaped base, the other end of the movable contact elastic piece is positioned at a notch of the movable contact mounting groove and is contacted with the spring card, the spring card is provided with a card limiting part, the movable contact elastic piece elastically presses the card limiting part to the card pressing block, and the base wiring board is elastically pressed to the opening of the movable contact mounting groove.
  4. 4. The oil immersed circuit breaker according to claim 1, wherein the stationary contact charging assembly comprises a bimetal, a stationary metal bracket and a stationary contact; One end of the bimetallic strip is arranged on the main insulation base, the other end of the bimetallic strip is provided with the static metal support, the static metal support is connected with the tripping support, and the static contact is connected with the bimetallic strip.
  5. 5. The oil immersed circuit breaker as claimed in claim 4, wherein the high current trip assembly comprises a magnetic attraction piece and a trip push-pull rod; The magnetic attraction piece is movably arranged on the main insulation base, one end of the tripping push-pull rod is connected with the magnetic attraction piece, the other end of the tripping push-pull rod is contacted with the tripping bracket, the static contact electrification component is electrified and is provided with magnetism for magnetically attracting the magnetic attraction piece, and when the magnetic attraction piece moves to abut against the static contact electrification component, the tripping bracket is driven to relatively rotate on the main insulation base through the tripping push-pull rod.
  6. 6. The oil immersed circuit breaker according to claim 5, wherein a rod clamping opening is formed in the side portion of the main insulation base; One end of the magnetic attraction piece is rotatably connected with the rod clamping opening, the other end of the magnetic attraction piece is connected with one end of the tripping push-pull rod, the other end of the tripping push-pull rod is rotatably connected with the tripping bracket, the magnetic attraction piece swings around the rod clamping opening to be adsorbed to the static contact electrification component, and an adsorption gap is formed between the magnetic attraction piece and the static contact electrification component when the magnetic attraction piece is adsorbed to the static contact electrification component.
  7. 7. The oil-immersed circuit breaker according to claim 4, further comprising a coarse adjustment assembly and a bracket swing spring; The coarse adjustment assembly comprises a coarse adjustment seat and a coarse adjustment connecting rod; The device comprises a fixed metal bracket, a trip bracket, a rough adjusting seat, a trip bracket, a rough adjusting connecting rod, a main insulation base and a main insulation base, wherein the fixed metal bracket is arranged on the fixed metal bracket; The front side of the tripping support is contacted with the rough adjusting connecting rod, the support swinging elastic piece is arranged at the rear side of the tripping support, the middle part of the tripping support is rotatably arranged on the main insulating base, one end of the support swinging elastic piece is contacted with the main insulating base, the other end of the support swinging elastic piece is contacted with the tripping support, and the support swinging elastic piece elastically presses the front side of the tripping support to the rough adjusting connecting rod.
  8. 8. The oil-immersed circuit breaker according to claim 7, further comprising an overload fine adjustment structure; the overload fine adjustment structure comprises a tripping card, a card rotating shaft and an operation assembly; the card rotating shaft is arranged on the tripping bracket; the trip card is arranged on the trip bracket and is provided with a trip surface; one end of the trip card is rotatably connected with the card rotating shaft, and the other end of the trip card is provided with a card operation port; The operation assembly comprises an operation connector and an operation connecting rod; The operation connector is connected to the card operation port and is limited to move in the connecting rod accommodating groove, and the operation connecting rod is connected to the operation connector and used for driving the operation connector to swing around the card rotating shaft and adjusting the horizontal position of the tripping surface.
  9. 9. The oil immersed circuit breaker according to claim 8, wherein the opening and closing brake structure is provided with a circuit breaker handle; the overload micro-adjusting structure also comprises a handle adjusting rod; The tripping support is rotatably arranged on the main insulation base through a tripping pendulum shaft and rotates around the tripping pendulum shaft; the operation connecting rod is provided with a shaft matching part and a rod operation part, wherein the shaft matching part is movably sleeved on the tripping swing shaft; The main insulation base is connected to the inner side of the breaker handle, the handle adjusting rod is rotatably arranged on the breaker handle and penetrates through the inner side and the outer side of the breaker handle, one end of the handle adjusting rod is located on the outer side of the breaker handle and used for driving the handle adjusting rod to rotate, and one end of the handle adjusting rod extends to the inner side of the breaker handle and is in contact with the rod operating portion and used for driving the rod operating portion to move.
  10. 10. The oil immersed circuit breaker according to any one of claims 1-9, wherein the alarm mechanism comprises an alarm rack, an alarm conductive assembly, an alarm push-pull rod, a lifting cross rod and a lifting vertical rod; the alarm conducting assembly is electrically and insulatively arranged on the alarm rack, the alarm push-pull rod can be moved to the alarm rack in a resetting way, the alarm push-pull rod is provided with a V-shaped opening, the V-shaped opening is provided with a guiding inclined wall, and the lifting cross rod can be limited on the alarm rack in a lifting way and transversely extend into the V-shaped opening; The alarm rack is provided with a rack plane, and the rack plane is provided with a rack transverse groove; When the switch is closed, the switch opening and closing clamp head is clamped to the tripping bracket, the switch opening and closing structure drives the alarm push-pull rod to move to drive the guide inclined wall to move, the guide inclined wall drives the lifting cross rod to move in a lifting manner to drive the lifting vertical rod to lift in the transverse slot of the rack, and the lifting cross rod keeps contact with the alarm conductive assembly until one end of the lifting vertical rod abuts against the tripping bracket, so that the alarm conductive assembly is in conductive connection with the lifting cross rod; when the switch is opened, the switch opening and closing clamp head is separated from the tripping support, the tripping support is used for driving the lifting vertical rod to reset, the lifting vertical rod drives the lifting cross rod to separate from the alarming conductive assembly, and the alarming conductive assembly gives an alarm.

Description

Oil immersed circuit breaker Technical Field The invention relates to the field of circuit breakers, in particular to an oil immersed circuit breaker. Background An oil-immersed circuit breaker is a high-voltage switching device, which uses insulating oil as an arc extinguishing and insulating medium, and is widely applied to a power system. The core working principle is to cut off fault current by generating an arc in oil and rapidly extinguishing the arc by utilizing the cooling and insulating properties of the oil. In the prior art, the transmission structure between the opening mechanism and the alarm mechanism of the oil-immersed circuit breaker is complex, so that the cooperative insufficiency between the opening mechanism and the alarm mechanism is caused, the opening is not in place easily, the alarm mechanism is triggered, on one hand, the triggering time of the alarm mechanism is inaccurate, and on the other hand, the overload of the opening mechanism and the alarm mechanism cannot be synchronized. Disclosure of Invention The invention aims to provide an oil-immersed circuit breaker, which is clamped on a tripping bracket through an opening and closing clamping head and is propped against the tripping bracket through a lifting vertical rod during closing, wherein a movable end of a static contact charging assembly is tilted when heated to drive the tripping bracket to swing so as to enable the opening and closing clamping head and the lifting vertical rod to be separated from the tripping bracket, and an alarm mechanism gives an alarm. To achieve the purpose, the invention adopts the following technical scheme: An oil immersed circuit breaker comprises a main insulation base, an opening and closing gate structure, a static contact electrification component, a heavy current tripping component, a moving contact electrification component and an alarm mechanism; The high-current tripping assembly is provided with a tripping bracket which is rotatably connected with the main insulation base, the fixed end of the static contact charging assembly is arranged on the main insulation base, the movable end of the static contact charging assembly is connected with the tripping bracket, and the movable end of the static contact charging assembly is tilted when heated to drive the tripping bracket to swing; The movable contact charging assembly is movably arranged on the main insulation base, and the opening and closing clamp head is arranged on the opening and closing structure; the alarm mechanism is provided with a lifting vertical rod; When in closing, the opening and closing clamp head is clamped on the tripping bracket, so that the moving contact charging assembly and the fixed contact charging assembly are kept in contact; when the brake is opened, the brake opening and closing clamping head and the lifting vertical rod are separated from the tripping bracket, and the alarm mechanism gives an alarm. Optimally, the opening and closing brake structure comprises a plurality of connecting rotating mechanisms and breaker handles; The movable contact electrification assembly comprises an opening and closing insulating bracket and a movable contact; the movable contact is connected to the front of the opening and closing insulating support, the multi-piece connecting rotating mechanism is arranged on the opening and closing insulating support, and the tripping support is provided with a tripping surface at the rear of the opening and closing insulating support; The multi-piece connecting rotating mechanism comprises a first supporting rotating shaft, a second supporting rotating shaft, a third supporting rotating shaft, a fourth supporting rotating shaft and a plurality of sheet structures; The first support rotating shaft, the third support rotating shaft and the second support rotating shaft are sequentially distributed in sequence from front to back; the sheet structure is divided into an opening and closing brake push-pull sheet, a rear supporting sheet, an upper swinging bent sheet, a lower swinging bent sheet, an opening and closing clamping head, a direct connection sheet and a front supporting sheet; The front of the opening and closing brake push-pull sheet is rotatably connected with one end of the straight connecting sheet, the other end of the straight connecting sheet is rotatably connected with one end of the front supporting sheet, the other end of the front supporting sheet is rotatably connected with the third supporting rotating shaft, and the third supporting rotating shaft is connected with the opening and closing insulating bracket; The back of the opening and closing gate push-pull sheet is rotatably connected with one end of the lower swing bending sheet and one end of the upper swing bending sheet, the other end of the lower swing bending sheet is rotatably connected with one end of the rear supporting sheet, the other end of the rear supporting sheet is rotatably connected with the seco