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CN-122025484-A - Intelligent circuit breaker

CN122025484ACN 122025484 ACN122025484 ACN 122025484ACN-122025484-A

Abstract

The invention discloses an intelligent circuit breaker, and belongs to the technical field of circuit breakers. The circuit breaker arc-extinguishing grating sheet comprises a shell, wherein an operating mechanism comprising an operating handle and a transmission assembly is arranged in the shell, the arc-extinguishing mechanism comprises an arc-extinguishing support and arc-extinguishing grating sheets, the arc-extinguishing grating sheets comprise a plurality of arc-extinguishing support and are arranged on the arc-extinguishing support at intervals along the width direction of the arc-extinguishing support, the arc-extinguishing grating sheets comprise a plurality of traversing sheets which are arranged in the arc-extinguishing support in a sliding manner along the arrangement direction, the arc-extinguishing mechanism further comprises a driving piece and a linkage assembly, the driving piece is arranged on the arc-extinguishing support in a sliding manner, the driving piece can drive all traversing sheets to slide, the interval between adjacent traversing sheets is increased, the linkage assembly is respectively connected with the operating handle and the driving piece in a linkage manner, and the operating handle drives the driving piece to slide through the linkage assembly.

Inventors

  • ZHANG XIAOPING

Assignees

  • 浙江苏高电气有限公司

Dates

Publication Date
20260512
Application Date
20260317

Claims (8)

  1. 1. An intelligent circuit breaker is characterized by comprising a shell (100), wherein the shell (100) is internally provided with The contact mechanism comprises a moving contact (20) and a fixed contact (21); The operating mechanism comprises an operating handle (30) and a transmission assembly (31), wherein the operating handle (30) is rotationally connected to the shell (100), the transmission assembly (31) is respectively in transmission connection with the operating handle (30) and the moving contact (20), and the operating handle (30) can drive the moving contact (20) to contact the fixed contact (21) through the transmission assembly (31); The arc extinguishing mechanism comprises an arc extinguishing bracket (40) and arc extinguishing grid plates (41), wherein the arc extinguishing grid plates (41) are provided with a plurality of arc extinguishing support plates (40) and are arranged on the arc extinguishing bracket (40) at intervals along the width direction of the arc extinguishing bracket (40), the arc extinguishing grid plates (41) comprise a plurality of transverse moving plates, and the transverse moving plates are arranged in the arc extinguishing bracket (40) in a sliding manner along the arrangement direction; The arc extinguishing mechanism further comprises a driving piece (42) and a linkage assembly, the driving piece (42) is arranged on the arc extinguishing support (40) in a sliding mode, the driving piece (42) can drive all the transverse moving pieces to slide, the interval between the adjacent transverse moving pieces is increased, the linkage assembly is respectively connected with the operating handle (30) and the driving piece (42) in a linkage mode, and the operating handle (30) drives the driving piece (42) to slide through the linkage assembly.
  2. 2. The intelligent circuit breaker according to claim 1, wherein the operating handle (30) has a closing position and a separating position, when the operating handle (30) rotates to the closing position, the distance between the traverse pieces is unchanged, and when the operating handle (30) rotates to the separating position, the distance between the adjacent traverse pieces is increased.
  3. 3. The intelligent circuit breaker according to claim 2, wherein the arc extinguishing grid plate (41) further comprises a plurality of longitudinal moving plates, the longitudinal moving plates are arranged on the arc extinguishing support (40) in a sliding mode along the length direction of the longitudinal moving plates, and the driving piece (42) can drive all the longitudinal moving plates to move towards the fixed contact (21).
  4. 4. The intelligent circuit breaker according to claim 3, wherein the arc extinguishing bracket (40) is provided with a transverse moving hole (401) and a longitudinal moving hole (402) on two sides, transverse moving clamping blocks are arranged at two ends of the transverse moving sheet and are slidably arranged in the corresponding transverse moving hole (401), longitudinal moving clamping blocks are arranged at two ends of the longitudinal moving sheet and are slidably arranged in the corresponding longitudinal moving hole (402).
  5. 5. The intelligent circuit breaker according to claim 4, wherein the driving member (42) is slidably disposed along a length direction of the longitudinal moving piece, a driving longitudinal hole (403) is formed in the driving member (42), the longitudinal moving clamping block is inserted and positioned in the driving longitudinal hole (403), a driving transverse hole (404) is formed in the driving member (42), the transverse moving clamping block is movably disposed in the driving transverse hole (404), a first inclined side wall (405) and a second inclined side wall (406) are respectively disposed in the driving transverse hole (404), when the driving member (42) slides, the first inclined side wall (405) can be abutted against the transverse moving clamping block and drive the transverse moving clamping block to slide, and when the driving member (42) resets, the second inclined side wall (406) can be abutted against the transverse moving clamping block and drive the transverse moving clamping block to reset.
  6. 6. The intelligent circuit breaker according to claim 5, wherein the linkage assembly comprises a driving gear (60) and a driving lever (61), the driving gear (60) and the operating handle (30) are coaxially and rotatably connected to the housing (100), the operating handle (30) is provided with a tooth line meshed with the driving gear (60), a driving part (62) and a resetting part (63) are arranged at an eccentric position of the driving gear (60), one end of the driving lever (61) is movably limited between the driving part (62) and the resetting part (63), the driving lever (61) and the operating handle (30) are coaxially and rotatably connected to the housing (100), two limiting parts (70) are arranged at intervals along the length direction of the transverse moving piece, the other end of the driving lever (61) is movably limited between the two limiting parts (70), and when one end of the driving lever is abutted against the driving part (62), the other end of the driving lever (61) is abutted against the corresponding limiting part (70) and drives the other end of the driving lever (42) to abut against the limiting part (42).
  7. 7. The intelligent circuit breaker according to claim 1, wherein the driving member (42) is provided with a plurality of heat discharging holes (801) on the side wall.
  8. 8. The intelligent circuit breaker according to claim 4, wherein the outer side wall of the driving member (42) is provided with a plurality of heat discharging grooves (802) corresponding to the traverse holes (401), one side of each heat discharging groove (802) is connected with the traverse holes (401), and the other side extends to the end part of the driving member (42).

Description

Intelligent circuit breaker Technical Field The invention relates to an intelligent circuit breaker, and belongs to the technical field of circuit breakers. Background Circuit breakers are a critical type of power protection device that is used primarily to automatically cut electrical circuits to protect electrical systems and equipment from faults. The core function of the device is to act rapidly when abnormal current (such as overload or short circuit) is detected, isolate fault parts, ensure safe and stable operation of a power grid and prevent secondary disasters such as fire disaster. The circuit breaker is mainly divided into various types such as an air circuit breaker, a vacuum circuit breaker, an SF6 circuit breaker and the like, the arc extinguishing principle of the air circuit breaker is that air is used as an arc extinguishing medium, an arc is rapidly lengthened, cooled and divided through arc extinguishing grid plates to be extinguished finally, the arc extinguishing effect of the circuit breaker is related to the interval between the arc extinguishing grid plates, the arc voltage can be increased more rapidly when the interval between the arc extinguishing grid plates is smaller, so that zero crossing extinction of current is forced, but the smaller interval between the arc extinguishing grid plates can cause difficulty in heat dissipation and air exhaust, the dense grid plates can block the flow of high-temperature ionized gas like a blocking wall to form a reaction for arc extinguishing, and people often set reasonable intervals between the arc extinguishing grid plates to be bothered. Disclosure of Invention The invention aims to solve the technical problem of providing an intelligent circuit breaker, which solves the problem that the interval arrangement of arc extinguishing grid plates of the circuit breaker is not ideal in the prior art. The technical problems to be solved by the invention are realized by adopting the following technical scheme: An intelligent circuit breaker comprises a shell, wherein the shell is internally provided with The contact mechanism comprises a moving contact and a fixed contact; the operating mechanism comprises an operating handle and a transmission assembly, wherein the operating handle is rotationally connected to the shell, the transmission assembly is respectively in transmission connection with the operating handle and the moving contact, and the operating handle can drive the moving contact to contact the fixed contact through the transmission assembly; The arc extinguishing mechanism comprises a plurality of arc extinguishing brackets and arc extinguishing grating sheets, wherein the arc extinguishing grating sheets are arranged on the arc extinguishing brackets at intervals along the width direction of the arc extinguishing brackets, each arc extinguishing grating sheet comprises a plurality of transverse moving sheets, and the transverse moving sheets are arranged in the arc extinguishing brackets in a sliding manner along the arrangement direction; The arc extinguishing mechanism further comprises a driving piece and a linkage assembly, the driving piece is arranged on the arc extinguishing support in a sliding mode, the driving piece can drive all the transverse moving pieces to slide, the interval between adjacent transverse moving pieces is increased, the linkage assembly is respectively connected with the operating handle in a linkage mode with the driving piece, and the operating handle drives the driving piece to slide through the linkage assembly. Through adopting above-mentioned technical scheme, have the sideslip piece that part can change the interval in the arc extinguishing bars piece to can drive the sideslip piece through operating handle and slide, and operating handle is controlling the divide-shut brake of circuit breaker, therefore the interval of part arc extinguishing bars piece can be at the automatic interval that changes of stage of divide-shut brake, thereby carries out corresponding adjustment, compares the fixed spaced mode of current arc extinguishing bars piece, and the interval of sideslip piece is more reasonable. The invention is further characterized in that the operating handle is provided with a closing position and a separating position, when the operating handle rotates to the closing position, the distance between the transverse moving sheets is unchanged, and when the operating handle rotates to the separating position, the distance between the adjacent transverse moving sheets is increased. According to the technical scheme, before the response time of the moving contact and the fixed contact in separation is the response time of the moving plate, when the moving contact and the fixed contact are just separated, the moving plate does not move, and after transient response, the moving plate moves, so that when an electric arc is just generated, the arc extinguishing grid plates with smaller intervals can b