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CN-120878514-B - Double-error-closing-prevention depth fusion circuit breaker with isolating switch

CN120878514BCN 120878514 BCN120878514 BCN 120878514BCN-120878514-B

Abstract

The invention relates to the technical field of electrical equipment, in particular to a double-error-prevention switching-on depth fusion circuit breaker with a disconnecting switch, which comprises a circuit breaker body, a frame, a switching-on and switching-off mechanism, an electromagnetic push rod and a manual switching assembly, the top of the breaker body is rotationally provided with an isolation switch blade, the frame is rotationally provided with an adjusting component for controlling the opening and closing of the isolation switch blade, and the adjusting component comprises a transmission rotating shaft and a plurality of extrusion pushing blocks. When the isolating knife switch is opened, the mechanical protection rod and the electric protection rod extend under the action of elasticity, the extending limiting clamping block is attached to the limiting clamping groove in the mechanical protection aspect, the blocking column is abutted to the poking plate body, rotation of the connecting rotating shaft is avoided, opening of the switching-on and switching-off mechanism is further avoided, manual switching-on operation is carried out, in the electric protection aspect, the extending electric protection rod is disconnected with the travel switch, a control loop of the electromagnetic push rod is cut off, and electric switching-on operation of the circuit breaker is avoided under the condition of isolating switching-off.

Inventors

  • SHU MINGLIANG
  • ZHU QIANBIAO

Assignees

  • 江苏宏达电气有限公司

Dates

Publication Date
20260512
Application Date
20250904

Claims (7)

  1. 1. The double-error-closing-prevention deep fusion circuit breaker with the isolating switch is characterized by comprising a circuit breaker body (1), a frame (2), a closing and opening mechanism (10), an electromagnetic push rod (11) and a manual switching assembly (14), wherein the isolating switch blade (4) is rotatably arranged at the top end of the circuit breaker body (1), an adjusting assembly (6) for controlling the opening and closing of the isolating switch blade (4) is rotatably arranged on the frame (2), the adjusting assembly (6) comprises a transmission rotating shaft (601) and a plurality of extrusion push blocks (604), a mechanical protection rod (7) and an electrical protection rod (8) are slidably arranged in the frame (2), one end of the mechanical protection rod (7) penetrates through the closing and opening mechanism (10) and is connected with a limiting assembly (12), a closing pulling piece (13) for controlling the opening of the closing and opening of the closing mechanism (10) is rotatably arranged at one end, which is close to the limiting assembly (12), and the output end of the electromagnetic push rod (11) corresponds to the closing pulling piece (13); The limiting assembly (12) comprises a guide cylinder (1201), a reset spring (1203) and a limiting column (1204), wherein the guide cylinder (1201) is fixedly arranged on the inner side of the frame (2), the limiting column (1204) is slidably arranged on the inner side of the guide cylinder (1201), waist-shaped grooves (1202) are formed in two sides of the guide cylinder (1201), limiting pins (1205) sliding in the waist-shaped grooves (1202) are inserted into the limiting column (1204), and two ends of the reset spring (1203) are respectively attached to the inner wall of the guide cylinder (1201) and the limiting column (1204); The limiting device is characterized in that one end of the limiting post (1204) is provided with a limiting clamping block (1206), one end of the limiting clamping block (1206) is fixedly connected with the mechanical protection rod (7), and the bottom end of the limiting clamping block (1206) is provided with a blocking post.
  2. 2. The double-error-closing-prevention depth fusion breaker with the isolating switch, as set forth in claim 1, wherein the adjusting assembly (6) further comprises a crank arm (602), an accelerating spring (603) and a hinge block (605), the crank arms (602) and the hinge block (605) are fixedly arranged on the outer side of the transmission rotating shaft (601), a push-pull rod (5) is hinged at the tail end of the crank arm (602), the top end of the push-pull rod (5) is hinged with the isolating switch blade (4), one end of the accelerating spring (603) is hinged with the hinge block (605), the other end of the accelerating spring is hinged with the frame (2), and when the isolating switch blade (4) is closed, the push block (604) is extruded to respectively extrude the mechanical protection rod (7) and the electrical protection rod (8).
  3. 3. The double-error-closing-prevention deep fusion circuit breaker with the disconnecting switch is characterized in that the closing pulling piece (13) comprises a pulling piece body (1303) and a connecting rotating shaft (1302), a limiting clamping groove (1301) is formed in one side of the pulling piece body (1303), the end face of the limiting clamping groove (1301) can correspond to the limiting clamping block (1206), the connecting rotating shaft (1302) is communicated with the opening and closing mechanism (10), the connecting rotating shaft (1302) and the pulling piece body (1303) form fixed connection, and when the limiting clamping block (1206) is attached to the limiting clamping groove (1301), an interception column where the limiting clamping block (1206) is located is abutted to the pulling piece body (1303).
  4. 4. The double-error-closing-prevention depth fusion circuit breaker with the disconnecting switch is characterized in that the tail end of an electric protection rod (8) is connected with a travel switch (9), the travel switch (9) is electrically connected with an electromagnetic push rod (11), when an extrusion push block (604) extrudes the electric protection rod (8), the tail end of the electric protection rod (8) triggers the travel switch (9), and when the electric protection rod (8) is reset, the electric protection rod (8) is disconnected with the travel switch (9).
  5. 5. The double-error-closing-prevention depth fusion circuit breaker with the disconnecting switch, which is disclosed in claim 3, is characterized in that a stop block is arranged in the middle of the plectrum body (1303), the manual switching assembly (14) comprises two swinging rods, and when the swinging rods squeeze the stop block, the plectrum body (1303) can be driven to rotate around a connecting rotating shaft (1302).
  6. 6. The double-error-closing-prevention depth fusion circuit breaker with the isolating switch, which is disclosed in claim 1, is characterized in that the tail end of the transmission rotating shaft (601) is detachably connected with the isolating handle (3), the isolating handle (3) is in a labor-saving lever structure, and the opening end of the isolating handle (3) is positioned on the long arm side.
  7. 7. The double-error-closing-prevention deep fusion circuit breaker with the disconnecting switch, which is disclosed in claim 1, is characterized in that a spring for resetting is arranged on the inner side of the electric protection rod (8) positioned on the rack (2).

Description

Double-error-closing-prevention depth fusion circuit breaker with isolating switch Technical Field The invention relates to the technical field of electrical equipment, in particular to a double-error-closing-prevention depth fusion circuit breaker with a disconnecting switch. Background The circuit breaker has extremely wide application field, and almost covers all electric systems needing safety control, protection and switching of electric power loops. In the overhauling process, if an operator misjudges or tries to close the circuit breaker when the disconnecting switch is not completely closed (or is not reliably positioned at the closing position), or the control system logic missends a closing instruction, the circuit breaker can be connected with a circuit under the condition that the main circuit has high voltage or residual fault current, and huge arc discharge is generated. The arc energy is extremely high, which can instantaneously burn out equipment (such as arc extinguishing chambers, contacts, insulating components, etc.), resulting in severe explosions and fires, with catastrophic consequences for the equipment, nearby personnel, and the overall power distribution system. Therefore, the invention provides a double-error-closing-prevention deep fusion circuit breaker with a disconnecting switch, which is necessary to solve the problems. Disclosure of Invention The invention aims to provide a double-error-closing-prevention deep fusion breaker with a disconnecting switch, which achieves the aim of controlling the opening sequence of the disconnecting switch and the breaker by arranging the mechanical interlocking and the electrical interlocking. In order to achieve the purpose, the invention adopts the following technical scheme: The utility model provides a take isolator degree of depth to fuse circuit breaker of two mistake switchings of preventing, including circuit breaker body, frame, divide-shut brake mechanism, electromagnetic push rod and manual switching assembly, the top of circuit breaker body rotates installs the isolation plug-in strip, the frame rotates installs the adjusting part that is used for controlling the isolation plug-in strip to open and shut, adjusting part includes transmission pivot and a plurality of extrusion ejector pad, the inside slidable mounting of frame has mechanical protection pole and electric protection pole, the one end of mechanical protection pole runs through divide-shut brake mechanism and is connected with spacing subassembly, the one end that divide-shut brake mechanism is close to spacing subassembly rotates and installs the switch-on plectrum that controls its opening, switch-on plectrum can correspond with spacing subassembly joint, electromagnetic push rod's output and switch-on plectrum. The adjusting component is used for controlling the opening and closing of the isolating switch blade and is used as a preferable scheme of the double-error-prevention switch-on deep fusion breaker with the isolating switch, the adjusting component further comprises a crank arm, an accelerating spring and a hinging block, the crank arms and the hinging block are fixedly arranged on the outer side of a transmission rotating shaft, the tail end of each crank arm is hinged with a push-pull rod, the top end of each push-pull rod is hinged with the isolating switch blade, one end of the accelerating spring is hinged with the hinging block, the other end of the accelerating spring is hinged with the frame, and when the isolating switch blade is closed, the extruding pushing block respectively extrudes the mechanical protection rod and the electric protection rod. The utility model provides a spacing subassembly in mechanical protection, as a double-protection mistake switch-on's take isolator degree of depth to fuse circuit breaker's a preferred scheme, spacing subassembly includes guide cylinder, reset spring and spacing post, guide cylinder fixed mounting is in the inboard of frame, spacing post slidable mounting is in the inboard of guide cylinder, waist type groove has been seted up to the both sides of guide cylinder, spacing post inserts and has the spacer pin that is located the interior sliding of waist type groove, reset spring's both ends are laminated in guide cylinder inner wall and spacing post respectively. As a preferable scheme of the double-error-prevention switching-on type deep fusion breaker with the isolating switch, one end of the limiting column is provided with a limiting clamping block, one end of the limiting clamping block is fixedly connected with the mechanical protection rod, and the bottom end of the limiting clamping block is provided with a interception column. As a preferable scheme of the double-error-prevention switching-on deep fusion circuit breaker with the isolating switch, the switching-on plectrum comprises a plectrum body and a connecting rotating shaft, wherein a limiting clamping groove is formed in one side of the plect