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CN-122025454-A - 24Kv dual-power distribution cabinet

CN122025454ACN 122025454 ACN122025454 ACN 122025454ACN-122025454-A

Abstract

The invention relates to a 24kv dual-power-supply power distribution cabinet which comprises two transmission sleeves, two groups of locking assemblies, two transmission ropes and an elastic reset piece. One end of the transmission sleeve is provided with a radial clamping groove for self-adaptive rotation stopping fit with the driving main shaft when the circuit breaker handcart is pushed into a working position, the periphery of the transmission sleeve is provided with a cam surface, and the other end of the transmission sleeve is provided with a lock hole. The elastic reset piece applies a restoring moment to the transmission sleeve so as to keep the transmission rope to be contracted and the phase of the clamping groove constant in the moving process of the handcart. The locking component comprises a polygonal lock tongue and a spring. When any driving main shaft is switched on to drive the corresponding transmission sleeve to rotate, the transmission rope is released through the cam surface, so that the lock tongue at the other side is inserted into the corresponding lock hole under the action of the pressure spring to implement physical deadlock. The accumulation of transmission gaps is eliminated, the high-strength forced interlocking of the main shaft stage is realized, and the operation safety of the system is obviously improved.

Inventors

  • SUN BIN
  • ZHANG GANG
  • WEI ZHENG
  • SHEN ZE
  • ZANG YUNCHAO

Assignees

  • 无锡双欢电气有限公司

Dates

Publication Date
20260512
Application Date
20260414

Claims (10)

  1. 1.24Kv dual-power distribution cabinet, comprising a cabinet body, a first breaker, a second breaker and an interlocking device are arranged in the cabinet body, characterized in that, The interlocking device comprises a cabinet body arranged on the cabinet body: Two transmission sleeves which are oppositely arranged at intervals, wherein one end of each transmission sleeve is provided with a lock hole, the other end of each transmission sleeve is provided with a clamping groove which extends radially, and the driving main shaft can slide into the clamping groove radially and stop rotating relatively; The two groups of locking assemblies are oppositely arranged at intervals, and each group of locking assemblies comprises a lock tongue used for being locked and rotated and inserted with a lock hole and a spring used for driving the lock tongue to move towards the lock hole; the two driving ropes are respectively a first driving rope and a second driving rope, one end of the first driving rope is connected to the side wall of the driving sleeve corresponding to the first circuit breaker, and the other end of the first driving rope is connected to the lock tongue corresponding to the second circuit breaker; The two driving ropes are arranged in such a way that when the driving main shaft on one side of the driving ropes is switched on and rotates, the corresponding driving sleeve rotates and releases the driving ropes; the elastic reset piece is used for applying a restoring moment which rotates back to the releasing direction of the driving rope to the driving sleeve.
  2. 2. The 24kv dual-power distribution cabinet according to claim 1, wherein the elastic reset member is a torsion spring sleeved on the periphery of the transmission sleeve, one end of the torsion spring is fixed on the frame, and the other end of the torsion spring is fixed on the transmission sleeve.
  3. 3. The 24kv dual power distribution cabinet of claim 2, wherein the pre-tightening torque of the torsion spring is greater than the rotational torque of the spring pulling the drive sleeve.
  4. 4. The 24kv dual-power-supply power distribution cabinet according to claim 1, wherein the outer circumferential surface of the transmission sleeve is a cam surface, the transmission rope is wound on the cam surface, and the release length of the transmission rope is longer than the arc length of the equiangular rotation of the transmission sleeve when the main shaft is driven to be switched on and rotated.
  5. 5. The 24kv dual power distribution cabinet according to claim 4, wherein the transmission sleeve is rotatably supported on the cabinet body, the opening direction of the clamping groove faces the push-in path of the corresponding first circuit breaker and second circuit breaker, and the groove width of the clamping groove is matched with the section width of the transmission end part of the driving main shaft.
  6. 6. The 24kv dual-power distribution cabinet of claim 5, wherein the locking bolt is of a polygonal columnar structure, and the shape of the locking hole is matched with the shape of the locking bolt.
  7. 7. The 24kv dual power distribution cabinet of claim 6, wherein an end of the tongue is provided with a tapered guide surface of the constriction.
  8. 8. The 24kv dual-power distribution cabinet according to any one of claims 1 to 7, wherein a reversing mechanism for changing the vector direction of the driving rope is arranged on the driving path of the driving rope, and the reversing mechanism comprises a tangential reversing wheel arranged on the radial outer side of the driving sleeve and an axial reversing wheel arranged on the outer side of the lock tongue.
  9. 9. The 24kv dual power distribution cabinet of claim 8, wherein the two reversing mechanisms are disposed on two radial sides of the transmission sleeve.
  10. 10. The 24kv dual-power distribution cabinet according to claim 1, wherein the locking assembly further comprises a guide bracket fixed on the cabinet body, the guide bracket is provided with a guide hole for guiding the lock tongue to reciprocate, and the spring is sleeved on the periphery of the lock tongue and is abutted between the guide bracket and the flange of the lock tongue.

Description

24Kv dual-power distribution cabinet Technical Field The invention relates to the technical field of double power supply cabinets, in particular to a 24kv double power supply power distribution cabinet. Background In the field of medium-voltage switch cabinets for switching dual power supplies, handcart type circuit breakers are widely used because of extremely high maintenance convenience and modularization degree. The handcart-type circuit breaker generally has two states of test position and working position in the cavity, and the space coupling of the moving contact and the fixed contact of the circuit breaker is realized by opening a valve mechanism in the cavity in the pushing process. In order to ensure the safety of the power supply, a strict mechanical interlock must be established between the two handcart type circuit breakers to prevent the catastrophic consequences of simultaneous closing of the two-way power supply. There are two existing circuit breaker interlocking modes, one is the interlocking before opening the valve, and the other is the interlocking during closing. For example, a mechanical interlocking mechanism for supplying power to a dual-power supply breaker cabinet is disclosed in Chinese patent document CN205122425U, and an interlocking plate or a button interception mechanism arranged on a cabinet body operation panel is adopted. In practical engineering applications, it has been found that such interlocking schemes based on external panels or operating inputs present a significant risk of phased failure for a handcart circuit breaker. After two handcart-type circuit breakers have been successfully pushed into place and a valve mechanism is completely opened and has a closing condition, the traditional panel-level interlocking can be transmitted to the inside of the circuit breaker only through a plurality of intermediate links such as a button, a deflector rod and the like due to the interlocking acting force, and the long-distance non-rigid transmission generates an interlocking blind area under the assembly error and vibration environment of the handcart mechanism, so that corresponding interlocking is not realized, and the interlocking is invalid. The existing interlocking mechanism cannot realize dynamic self-adaptive connection with a core driving main shaft of a circuit breaker in the moving process of a handcart. When both circuit breakers are in the working position to be closed, because of the mechanical break points or accumulated gaps between the interlocking points and the execution main shaft, even if one circuit breaker is in a closed state, the generated interlocking signals are difficult to forcedly lock the driving main shaft of the other circuit breaker through a physical carrier with enough rigidity. The phenomenon can cause a key closing window period after the valve mechanism is opened, the interlocking constraint fails, and the two circuit breakers can be closed simultaneously, so that the two paths of power supplies are induced to be connected in a fault mode at an electrified working position, huge electric arc and short-circuit electrodynamic force are generated, and the safety of operators and the running stability of a power distribution system are seriously threatened. Disclosure of Invention The invention aims to provide a 24kv dual-power-supply power distribution cabinet which is used for solving the technical problem that the interlocking of a closing lock is unreliable due to the fact that a direct and self-adaptive mechanical locking is lacked between an interlocking mechanism and a main shaft of a circuit breaker in the prior art. The technical scheme of the 24kv dual-power distribution cabinet is as follows: The 24kv dual-power distribution cabinet comprises a cabinet body, a first breaker, a second breaker and an interlocking device are arranged in the cabinet body, The interlocking device is configured such that when the circuit breaker trolley is pushed into the working position, the drive main shaft thereof is automatically engaged with the transmission sleeve, and when any one circuit breaker is switched on, the drive main shaft of the other circuit breaker is directly and physically locked, and the interlocking device comprises a cabinet body arranged on the cabinet body: Two transmission sleeves which are oppositely arranged at intervals, wherein one end of each transmission sleeve is provided with a lock hole, the other end of each transmission sleeve is provided with a clamping groove which extends radially, and the driving main shaft can slide into the clamping groove radially and stop rotating relatively; The two groups of locking assemblies are oppositely arranged at intervals, and each group of locking assemblies comprises a lock tongue used for being locked and rotated and inserted with a lock hole and a spring used for driving the lock tongue to move towards the lock hole; the two driving ropes are respectively a first driving ro