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CN-121983477-A - Current-carrying arc extinguishing system and circuit breaker

CN121983477ACN 121983477 ACN121983477 ACN 121983477ACN-121983477-A

Abstract

The application discloses a current-carrying arc extinguishing system and a circuit breaker, wherein the current-carrying arc extinguishing system comprises a current-carrying arc extinguishing main body, and comprises current-carrying units and arc extinguishing units which are arranged one by one, wherein the arc extinguishing units and the current-carrying units are distributed in a first direction, the current-carrying units comprise main contact assemblies, the arc extinguishing units comprise arc contact assemblies and arc extinguishing assemblies which are electrically connected, the connecting assemblies comprise transmission connecting assemblies and conductive connecting assemblies, the current-carrying units and the corresponding arc extinguishing units are in conductive connection through the conductive connecting assemblies and form a conducting loop, the transmission connecting assemblies comprise a first transmission mechanism and a second transmission mechanism which are spaced along the first direction and synchronously driven at an input end, and the output end of the first transmission mechanism and the output end of the second transmission mechanism are respectively in transmission connection with the main contact assemblies and the arc contact assemblies, and the transmission ratio of the first transmission mechanism is smaller than that of the second transmission mechanism. The current-carrying arc extinguishing system and the circuit breaker aim to improve breaking performance of the circuit breaker and ensure the reliability of current conversion of the circuit breaker.

Inventors

  • ZHANG SENLIN
  • WANG BINGQING
  • ZHANG HUIMIN
  • HUANG JINGYE
  • ZHOU HONGFA

Assignees

  • 上海电器科学研究所（集团）有限公司

Dates

Publication Date
20260505
Application Date
20260226

Claims (15)

  1. 1. A current carrying arc extinguishing system, comprising: The current-carrying arc extinguishing main body comprises current-carrying units (1) and arc extinguishing units (2) which are arranged in a one-to-one correspondence manner, wherein the arc extinguishing units (2) and the current-carrying units (1) are arranged in a first direction (X), the current-carrying units (1) comprise main contact assemblies (11), and the arc extinguishing units (2) comprise arc contact assemblies (21) and arc extinguishing assemblies (22) which are electrically connected; The connecting assembly comprises a transmission connecting assembly (3) and a conductive connecting assembly (4), wherein the current carrying unit (1) is in conductive connection with the arc extinguishing unit (2) corresponding to the current carrying unit through the conductive connecting assembly (4) to form a conductive loop, the transmission connecting assembly (3) comprises a first transmission mechanism (31) and a second transmission mechanism (32) which are arranged along the first direction (X) at intervals and synchronously driven at the input end, the output end of the first transmission mechanism (31) and the output end of the second transmission mechanism (32) are respectively in transmission connection with the main contact assembly (11) and the arc contact assembly (21), and the transmission ratio of the first transmission mechanism (31) is smaller than that of the second transmission mechanism (32).
  2. 2. The current carrying arc extinguishing system according to claim 1, characterized in that the transmission connection assembly (3) and the conductive connection assembly (4) are arranged separately on both sides of the current carrying arc extinguishing body in a second direction (Y); Wherein the second direction (Y) is arranged at an intersecting angle to the first direction (X).
  3. 3. The current-carrying arc extinguishing system according to claim 2, characterized in that the first transmission mechanism (31) is sequentially arranged and in transmission connection with the main contact assembly (11) in the second direction (Y), the second transmission mechanism (32), the arc extinguishing assembly (22) and the arc contact assembly (21) are sequentially arranged at intervals in the second direction (Y), and at least part of the second transmission mechanism (32) is arranged on one side of the arc extinguishing assembly (22) in the first direction (X) so as to be in transmission connection with the arc contact assembly (21).
  4. 4. A current carrying arc extinguishing system according to any one of claims 1 to 3, characterized in that the drive connection assembly (3) further comprises a drive spindle (33) extending in the first direction (X), the drive spindle (33) being provided at a side of the arc extinguishing assembly (22) facing away from the arcing contact assembly (21), the first drive mechanism (31) and the second drive mechanism (32) being connected to the drive spindle (33) at intervals in the first direction (X).
  5. 5. The current-carrying arc extinguishing system according to claim 4, wherein the first transmission mechanism (31) comprises a first transmission connecting piece (311) and a first transmission connecting rod (312), the first transmission connecting piece (311) is connected to the transmission main shaft (33), two ends of the first transmission connecting rod (312) are respectively movably connected to the first transmission connecting piece (311) and the main contact assembly (11), the second transmission mechanism (32) comprises a second transmission connecting piece (321) and a second transmission connecting rod (322), the second transmission connecting piece (321) is connected to the transmission main shaft (33), and two ends of the second transmission connecting rod (322) are respectively movably connected to the second transmission connecting piece (321) and the arc contact assembly (21).
  6. 6. The current carrying arc extinguishing system according to claim 5, wherein a length of the first transmission link (312) is smaller than a length of the second transmission link (322).
  7. 7. The current carrying arc extinguishing system according to claim 5, characterized in that the first transmission connection (311) has a first transmission hole (3111) rotationally connected to the first transmission link (312), the second transmission connection (321) has a second transmission hole (3211) rotationally connected to the second transmission link (322), the first transmission hole (3111) being spaced from the transmission spindle (33) by a distance smaller than the second transmission hole (3211) is spaced from the transmission spindle (33).
  8. 8. A current carrying arc extinguishing system according to any one of claims 1 to 3, characterized in that the main contact assembly (11) comprises a main contact (111) and a main stationary contact (112) arranged at intervals along a second direction (Y), the main contact (111) being movably connected with the first transmission mechanism (31), and the main contact (111) being movably arranged along the second direction (Y).
  9. 9. The current-carrying arc extinguishing system according to claim 8, characterized in that the active contact (111) comprises a supporting portion (1111) and a main contact portion (1112) connected, the supporting portion (1111) being movably connected with the first transmission mechanism (31) and being rotatably arranged in a plane perpendicular to the first direction (X), the main contact portion (1112) being provided at a side of the supporting portion (1111) facing the main stationary contact (112).
  10. 10. The current-carrying arc extinguishing system according to claim 8, characterized in that the arcing contact assembly (21) comprises an arcing moving contact (211) and an arcing stationary contact (212) arranged at intervals along a third direction (Z), the arcing moving contact (211) and the second transmission mechanism (32) being both rotatably arranged in a plane perpendicular to the first direction (X), the second transmission mechanism (32) extending along a second direction (Y) towards the arcing moving contact (211) and being movably connected to the arcing moving contact (211) on one side of the first direction (X).
  11. 11. The current carrying arc extinguishing system according to claim 10, characterized in that the conductive connection assembly (4) comprises a connection row conductor set (41) and a flexible connection conductor set (42), the main stationary contact (112) and the arc stationary contact (212) are directly connected in the first direction (X) through the connection row conductor set (41), and the active contact (111) and the arc moving contact (211) are connected in sequence through the connection row conductor set (41) and the flexible connection conductor set (42) to form the conductive loop of a ring structure.
  12. 12. The current-carrying arc extinguishing system according to claim 11, characterized in that the connection row wire set (41) comprises a main connection row (411) and an auxiliary connection row (412) which are connected, the main connection row (411) extends along the first direction (X) and is integrally arranged at one side of the current-carrying arc extinguishing body in the second direction (Y), two ends of the main connection row (411) are respectively connected to the main contact assembly (11) and the auxiliary connection row (412), the extending direction of the auxiliary connection row (412) is perpendicular to the extending direction of the main connection row (411), and the auxiliary connection row (412) sequentially extends from the end of the main connection row (411) to the arcing contact assembly (21) and the arc extinguishing assembly (22) to form the conducting loop between the main contact assembly (11), the arcing contact assembly (21) and the arc extinguishing assembly (22).
  13. 13. The current-carrying arc extinguishing system according to claim 12, characterized in that the active contact (111) and the arc moving contact (211) are sequentially connected through the main connection row (411), the auxiliary connection row (412) and the flexible connection wire group (42), wherein the flexible connection wire group (42) is fixedly connected to the auxiliary connection row (412) at one end of the third direction (Z), and the other end is movably connected to the arc moving contact (211).
  14. 14. The current-carrying arc extinguishing system according to claim 11, further comprising a connection terminal group (43), the connection terminal group (43) being connected to the active contact (111) and the main stationary contact (112) of the main contact assembly (11), respectively, and being arranged to protrude in the second direction (Y) to form an in-out line end, and the active contact (111) and the connection terminal group (43) being connected by the soft connection wire group (42).
  15. 15. A circuit breaker comprising the current carrying arc suppression system of any one of claims 1 to 14, the circuit breaker further comprising: The shell assembly comprises at least one shell unit (5), wherein the shell unit (5) comprises a first shell (51), a second shell (52) and a third shell, the first shell (51) and the second shell (52) are adjacently arranged or spaced along a first direction (X), the first shell (51) and the second shell (52) are respectively used for mounting the current carrying unit (1) and the arc extinguishing unit (2), at least one side of the first shell (51) in a third direction (Z) is open, the third shell is arranged on one side of the first shell (51) and the second shell (52) in a second direction (Y), and the transmission connecting assembly (3) is arranged in the third shell and penetrates through the first shell (51) and the second shell (52) to be respectively connected with the main contact assembly (11) and the arc contact assembly (21) in a transmission mode.

Description

Current-carrying arc extinguishing system and circuit breaker Technical Field The application belongs to the technical field of electrical equipment, and particularly relates to a current-carrying arc extinguishing system and a circuit breaker. Background Along with the development of the electric equipment, the voltage level of the electric equipment is gradually increased. When applying a circuit breaker as a switching device in an electrical circuit, then the circuit breaker is required to have a large current carrying capacity, i.e. to increase the volume of the current carrying system. Currently, in the existing circuit breaker, in order to ensure the reliability of a main contact in a current-carrying system and an arc contact in an arc extinguishing system in a current conversion process, the current-carrying system and the arc extinguishing system are generally arranged in the same cavity, so that the main contact and the arc contact are integrated into a whole and have a first-in-last-out effect. However, in the limited space of the internal chamber, the increase of the volume of the current-carrying system affects the installation space of the arc extinguishing system, resulting in poor arc extinguishing performance of the circuit breaker and difficult breaking voltage improvement. Disclosure of Invention The embodiment of the application provides a current-carrying arc extinguishing system and a circuit breaker, which aim to improve breaking performance of the circuit breaker and simultaneously ensure the reliability of current conversion of the circuit breaker. The embodiment of the application provides a current-carrying arc extinguishing system, which comprises a current-carrying arc extinguishing main body, wherein the current-carrying arc extinguishing main body comprises current-carrying units and arc extinguishing units which are arranged in a one-to-one correspondence manner, the arc extinguishing units and the current-carrying units are arranged in a first direction, the current-carrying units comprise main contact assemblies, the arc extinguishing units comprise arc contact assemblies and arc extinguishing assemblies which are electrically connected, the connecting assemblies comprise transmission connecting assemblies and conductive connecting assemblies, the current-carrying units and the arc extinguishing units corresponding to the current-carrying units are in conductive connection through the conductive connecting assemblies and form a conductive loop, the transmission connecting assemblies comprise a first transmission mechanism and a second transmission mechanism which are spaced along the first direction and are synchronously driven at an input end, the output end of the first transmission mechanism and the output end of the second transmission mechanism are respectively in transmission connection with the main contact assemblies and the arc contact assemblies, and the transmission ratio of the first transmission mechanism is smaller than that of the second transmission mechanism. The current-carrying arc extinguishing system comprises the transmission connecting assembly and the conductive connecting assembly which are respectively arranged on two sides of the current-carrying arc extinguishing main body in the second direction, wherein the second direction and the first direction are arranged at an intersecting angle. The current-carrying arc extinguishing system comprises a main contact assembly, a first transmission mechanism, an arc extinguishing assembly, an arc contact assembly, a second transmission mechanism, at least part of the second transmission mechanism, an arc extinguishing assembly and a control unit, wherein the first transmission mechanism and the main contact assembly are sequentially arranged in the second direction and are in transmission connection, the second transmission mechanism, the arc extinguishing assembly and the arc contact assembly are sequentially arranged at intervals in the second direction, and at least part of the second transmission mechanism is arranged on one side of the arc extinguishing assembly in the first direction so as to be in transmission connection with the arc contact assembly. The current-carrying arc extinguishing system, wherein the transmission connecting assembly further comprises a transmission main shaft extending along the first direction, the transmission main shaft is arranged on one side of the arc extinguishing assembly, which is opposite to the arc contact assembly, and the first transmission mechanism and the second transmission mechanism are connected to the transmission main shaft at intervals along the first direction. The current-carrying arc extinguishing system comprises the first transmission mechanism, the second transmission mechanism and the arc contact assembly, wherein the first transmission mechanism comprises a first transmission connecting piece and a first transmission connecting rod, the first tr