CN112447458A - Magnetic holding mechanism electric control assembly for gas insulated circuit breaker cabinet - Google Patents
Magnetic holding mechanism electric control assembly for gas insulated circuit breaker cabinet Download PDFInfo
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- CN112447458A CN112447458A CN201910736876.5A CN201910736876A CN112447458A CN 112447458 A CN112447458 A CN 112447458A CN 201910736876 A CN201910736876 A CN 201910736876A CN 112447458 A CN112447458 A CN 112447458A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 191
- 238000004146 energy storage Methods 0.000 claims abstract description 138
- 239000003990 capacitor Substances 0.000 claims abstract description 69
- 230000005540 biological transmission Effects 0.000 claims abstract description 43
- 230000002441 reversible effect Effects 0.000 claims abstract description 12
- 230000005284 excitation Effects 0.000 claims description 36
- 238000004891 communication Methods 0.000 claims description 21
- 238000002955 isolation Methods 0.000 claims description 21
- 230000009471 action Effects 0.000 claims description 20
- 238000013016 damping Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/32—Electromagnetic mechanisms having permanently magnetised part
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/68—Power reset mechanisms actuated by electromagnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses an electric control assembly of a magnetic latching mechanism for a gas insulated circuit breaker cabinet, which comprises a mechanism mounting frame, a transmission mechanism group, a magnetic latching operating mechanism, an energy storage capacitor, an energy storage spring, an auxiliary switch, a magnetic latching mechanism controller, an energy stored indicator lamp, a closing operation button, an opening operation button and a wiring terminal row. The magnetic latching mechanism controller, the energy storage capacitor, the magnetic latching operating mechanism, the auxiliary switch, the stored energy indicating lamp, the closing operation button, the opening operation button and the wiring terminal row are connected by a lead; the transmission mechanism group is connected with the magnetic latching operating mechanism, the auxiliary switch and the energy storage spring; a magnetic field is generated through a permanent magnet magnetic field in the magnetic latching operating mechanism and positive current of the magnet exciting coil, an internal movable iron core is driven to carry out suction motion, the switching-on of the circuit breaker is operated, and the switching-on state is kept; when a reverse magnetic field generated by the reverse current of the magnet exciting coil offsets the magnetic field of the permanent magnet, the circuit breaker is driven to open by the counterforce of the energy storage spring.
Description
Technical Field
The invention relates to an operating mechanism for a gas insulated circuit breaker cabinet.
Background
In the electric power transmission and distribution system at present, a gas insulated circuit breaker cabinet is widely used, and an operating mechanism of the gas insulated circuit breaker cabinet mainly uses a spring mechanism. The spring mechanism is used on the gas insulated circuit breaker cabinet, has certain stability, and is very suitable for places with few operation times and without remote control management. However, with the development of technologies, especially the development of internet technologies to the present day, technologies of big data, cloud computing and remote monitoring have reached a relatively high level, and if the technologies are integrated into the management of an electric power system to achieve intelligent, information and network management, it is required that switching devices in the electric power transmission and distribution system can meet the requirements of the technologies to achieve the functions of remote measurement and remote control. At present, the remote management control is realized to the current spring mechanism of direct transformation, and in the implementation process, the device is constituteed complicatedly, also has some unreliable factors.
Disclosure of Invention
In order to adapt to new development requirements, the magnetic latching operating mechanism is adopted as a driving device for opening and closing of the circuit breaker by combining with the current latest technology, and the magnetic latching operating mechanism has the advantages of simple and compact structure, less transmission parts, good system durability and the like; the magnetic latching mechanism controller is used for controlling the action of the magnetic latching operating mechanism, switching-on and switching-off operations are carried out on the circuit breaker, field event information is stored, the state information of the circuit breaker is transmitted to the management center through a remote wired network or a wireless network, and switching-on and switching-off operations are carried out by receiving an operation instruction of the management center, so that the remote management and real-time control functions of the circuit breaker are realized, and the magnetic latching mechanism controller is simple in structure and high in intelligence level; the trip output of the microcomputer protection device is directly connected to the magnet exciting coil of the magnetic latching operating mechanism through the trip interface, so that the direct drive of the fault trip of the circuit breaker is realized, the judgment time for reading the trip output signal of the microcomputer protection device by a magnetic latching mechanism controller and the control of the opening output time can be reduced, and the fault trip time of the circuit breaker is shorter; the maximum action times and the long-term action stability of the magnetic latching operating mechanism are superior to those of a spring mechanism; according to the mounting structure of the existing gas insulation circuit breaker cabinet, the spring operating mechanism is directly replaced by the magnetic latching operating mechanism, the overall design of the gas insulation circuit breaker cabinet does not need to be changed, the improvement scheme achieves better applicability, and the excellent cost performance is achieved.
The technical scheme adopted by the invention is as follows:
an electric control assembly of a magnetic holding mechanism for a gas insulated circuit breaker cabinet comprises a mechanism mounting frame, a transmission mechanism group, a magnetic holding operating mechanism (3), an energy storage capacitor (4), an energy storage spring (5), an auxiliary switch (6), a magnetic holding mechanism controller (7), an stored energy indicating lamp (8), a closing operation button (9), an opening operation button (10) and a wiring terminal row (11); the magnetic latching mechanism comprises a magnetic latching operating mechanism (3), an energy storage capacitor (4) and an energy storage spring (5), wherein the magnetic latching operating mechanism (3), the energy storage capacitor (4) and the energy storage spring (5) are arranged below a transverse plate (116) in a mechanism mounting frame, a transmission mechanism group and an auxiliary switch (6) are arranged above the transverse plate (116) in the mechanism mounting frame, the magnetic latching operating mechanism (3), the energy storage spring (5) and the auxiliary switch (6) are connected with each other through the transmission mechanism group, and a magnetic latching mechanism controller (7), an stored energy indicating lamp (8), a closing operation button (9), an opening operation button (10) and a wiring terminal row (11) are arranged on a controller mounting plate (111) right; a wiring port of the magnetic latching mechanism controller (7) is respectively connected with an excitation coil, an energy storage capacitor (4), an auxiliary switch (6), an energy stored indicator lamp (8), a closing operation button (9), an opening operation button (10) and a wiring terminal row (11) in the magnetic latching operation mechanism (3) through wires; the magnetic latching mechanism controller (7) controls the energy storage capacitor (4) to store energy in a charging mode, the stored energy is displayed to be normal through the stored energy indicating lamp (8), a remote switching-off and switching-on control signal is received through the wiring terminal strip (11) or the wireless interface, local operation signals of the switching-on operation button (9) and the switching-off operation button (10) are received, the excitation coil in the magnetic latching operation mechanism (3) and the energy storage capacitor (4) are controlled to be conducted in the forward direction and the reverse direction, and the magnetic latching operation mechanism (3) is enabled to generate switching-on and switching-off operations.
Further, the mechanism mounting frame comprises a bottom plate (101), an auxiliary switch support (102), a fixing support column (103), a main shaft rear support (104), an energy storage spring limiting plate (105), a brake separating stopping vibration damping pad (106), a transverse plate left support (107), an energy storage capacitance box (108), an energy storage spring baffle (109), a controller mounting plate left support (110), a controller mounting plate (111), a transverse plate right support (112), a controller mounting plate right lower support (113), a nut vibration damping pad (114), a rocker support column (115), a transverse plate (116), a main shaft mounting plate (117), a main shaft front support (118) and a brake mounting plate right upper support (119); the energy storage spring baffle plate comprises a bottom plate (101), a controller mounting plate, a pressing device mounting plate, a transverse plate left support (107), a transverse plate right support (112), a controller mounting plate left support (110), a controller mounting plate right lower support (113) and a pressing device mounting plate right upper support (119), wherein the left side and the right side of the bottom plate (101) are respectively bent forwards to form the transverse plate left support (107), the transverse plate right support (119) is bent rightwards to form an energy storage spring baffle plate (105), the transverse plate (116) is arranged on the transverse plate left support (107) and the transverse plate right support (112), the inner side of the transverse plate left support is connected with the; the main shaft rear bracket (104), the main shaft front bracket (118) and the rocker strut (115) are fixedly welded with the transverse plate (116) above the transverse plate (116); two ends of the fixed strut (103) are respectively welded and fixed with the main shaft rear bracket (104) and the bottom plate (101); the energy storage capacitance box (108) and the energy storage spring limiting plate (109) are arranged in front of the bottom plate (101) and below the transverse plate (116) by using fasteners; the auxiliary switch bracket (102) is arranged in front of the bottom plate (101) and above the transverse plate (116); the opening stopping vibration damping pad (106) is arranged on the energy storage spring baffle (105); the main shaft mounting plate (117) is mounted in front of the main shaft front bracket (118); the controller mounting plate (111) is arranged in front of the controller mounting plate left bracket (110), the controller mounting plate right lower bracket (113) and the press mounting plate right upper bracket (119); the controller mounting plate (111) is connected with a main shaft front bracket (118) through a nut vibration damping pad (114); the structure form has the outstanding advantage that the influence of vibration generated by the action of the magnetic retaining operating mechanism (3) on equipment arranged on the controller mounting plate (111) can be greatly reduced.
The transmission mechanism set comprises a main shaft (201), a switching-on and switching-off indicating plate (202), an isolation knife locking swing arm (203), a switching-on swing arm (205), a rocker (206), an auxiliary switch swing arm (207), an auxiliary switch connecting rod (208), an auxiliary switch transmission plate (210), a rocker driving connecting rod (209), a rocker driving connecting block (211), an isolation knife locking transmission rod (212), a switching-off swing arm (214), a switching-off energy storage spring pull rod (215) and a switching-on driving connecting rod (213); the main shaft (201) is fixedly arranged on a main shaft rear support (104) and a main shaft front support (118) of the mechanism mounting frame through a main shaft mounting plate (117) and a ball bearing (204), the front end of the main shaft (201) is a regular hexagonal column, a switching-off and switching-on indicating plate (202), an isolation knife locking swing arm (203), a switching-on swing arm (205) and a switching-off swing arm (214) are fixedly arranged from front to back in sequence, and the switching-on swing arm (205) is arranged between the main shaft rear support (104) and the main shaft front support (118); one end of a rocker (206) is hinged with a rocker support column (115), the other end of the rocker (206) is hinged with a closing swing arm (205) through a closing driving connecting rod (213), the middle of the rocker (206) is hinged with a rocker driving connecting block (211) through a rocker driving connecting rod (209), and the rocker driving connecting block (211) fixedly connects an auxiliary switch transmission plate (210) with a moving shaft of a magnetic latching operating mechanism (3); the auxiliary switch driving plate (210) is hinged with an auxiliary switch swing arm (207) through an auxiliary switch connecting rod (208), and the auxiliary switch swing arm (207) is fixedly installed with a rotating shaft of the auxiliary switch (6); the opening swing arm (214) is hinged with an opening energy storage spring pull rod (215), and the opening energy storage spring pull rod (215) penetrates through the energy storage spring baffle (105) and then is connected with an energy storage spring (5); the isolation knife locking transmission rod (212) is arranged right below the isolation knife locking swing arm (203).
The energy storage capacitor (4) is formed by connecting a plurality of aluminum electrolytic capacitors with withstand voltage of more than 450V and capacity of 1000 muF-2000 muF in parallel, and is arranged in the energy storage capacitor box (108), and the total capacity of the energy storage capacitor (4) is equal to the sum of the capacities of the aluminum electrolytic capacitors connected in parallel.
The magnetic latching mechanism controller (7) is responsible for controlling opening and closing actions of the magnetic latching operating mechanism (3), charging management of the energy storage capacitor (4), event recording, fault recording and wired and wireless data communication, can upload local various state information of the circuit breaker and receive opening and closing operations or various information query instructions of a remote management center on the circuit breaker; the charging device comprises a microcomputer system, a power supply circuit, a charging circuit, a driving circuit, an input interface, an output interface, a wired communication interface and a wireless communication interface; after a magnetic holding mechanism controller (7) is connected with an external DC 24V-DC 48V direct current power supply or an AC 85V-AC 265V alternating current power supply, a direct current high-voltage energy storage capacitor (4) charging power supply and a direct current low-voltage magnetic holding mechanism controller (7) internal circuit working power supply are generated through a power circuit, an input interface receives switch signals of a switch-on operation button (9), a switch-off operation button (10) and the switch-on state and the switch-off state of an auxiliary switch (6), an output interface outputs switch signals of an stored energy indicating lamp (8) to indicate that the stored energy of the energy storage capacitor (4) is normal, a wireless communication interface and a wired communication interface are used for remote data exchange and remote switch-off and switch-on operations, after the wireless communication interface is wirelessly connected with a smart phone, data exchange, switch-off and switch-on operations can be carried out through the smart phone, a charging circuit controls the energy storage charging process of the energy storage capacitor (4), and a driving circuit controls a magnet exciting coil in a magnetic ) And (4) discharging.
In addition, two signal wires output by tripping of the microcomputer protection device are respectively connected with the wiring terminal block (11), two groups of normally open contacts in the auxiliary switch (6) and two resistors in series in sequence, and then are connected to two ends of an excitation coil of the magnetic latching operating mechanism (3) according to the switching-off direction, so that the magnetic latching operating mechanism (3) can be directly controlled to generate switching-off operation. Compared with the mode that the magnetic latching mechanism controller (7) reads the tripping current signal output by the microcomputer protection device and then controls the opening operation of the magnetic latching operating mechanism (3), the intermediate transmission judgment time is reduced, the action delay time can be shortened, the action speed is higher, and the requirement that the fault tripping time of the circuit breaker is as short as possible is met.
The magnetic latching operating mechanism (3) is a monostable permanent magnet mechanism, when the magnetic latching operating mechanism is switched on, the switching-on direction (positive direction) of an excitation coil inside the magnetic latching operating mechanism is switched on an energy storage capacitor (4), the energy storage capacitor (4) discharges in the switching-on direction of the excitation coil, and a magnetic field generated by current in the switching-on direction in the excitation coil enables a movable iron core (armature) inside the magnetic latching operating mechanism (3) to overcome external force and to be switched on with a static iron core; after the movable iron core is attracted, a discharging loop of the energy storage capacitor (4) is cut off, the current in the closing direction of the excitation coil returns to zero, and the excitation magnetic field returns to zero, and at the moment, the magnetic field established by the permanent magnet in the magnetic latching operating mechanism (3) can enable the movable iron core to overcome the external force and keep the attraction state; when the switch is opened, the switch-off direction (reverse direction) of the excitation coil is connected with the energy storage capacitor (4), the energy storage capacitor (4) discharges in the switch-off direction of the excitation coil, a magnetic field generated by current in the switch-off direction of the excitation coil offsets a magnetic field established by a permanent magnet in the magnetic latching operating mechanism (3), the attraction force of the movable iron core disappears, and the movable iron core retreats to the switch-off state under the action of external force.
When a magnetic holding mechanism controller (7) executes a closing operation, an energy storage capacitor (4) is controlled to be connected with an excitation coil in a forward direction to conduct and discharge, a magnetic holding operating mechanism (3) performs a closing action to offset the tensioning elasticity of an energy storage spring (5) and the closing counter force of an arc extinguish chamber in a gas insulated circuit breaker cabinet, a moving shaft in the magnetic holding operating mechanism (3) generates upward linear motion, a rocker driving connecting rod (209) and a rocker (206) are hinged through a rocker driving connecting block (211) fixed on the moving shaft, the rocker (206) with one end serving as a fixed fulcrum is pushed to swing upwards to drive a closing driving connecting rod (213) and a closing swing arm (205) hinged with the other end of the rocker (206), so that the closing swing arm (205) is linked with a main shaft (201) to rotate in a clockwise direction (forward direction), the main shaft (201) outputs forward rotary motion to drive the gas insulated circuit breaker, the main shaft (201) drives the connected opening swing arm (214) and the opening energy storage spring pull rod (215), the opening energy storage spring pull rod (215) tensions an energy storage spring (5) for storing energy, the main shaft (201) drives the opening and closing indicating plate (202) to rotate to a closing indicating position, the isolating knife locking swing arm (203) is driven to rotate, and the isolating knife locking transmission rod (212) is pushed to an isolating knife operation locking position; an auxiliary switch connecting rod (208) and an auxiliary switch swing arm (207) are hinged through an auxiliary switch transmission plate (210) fixed on the moving shaft to drive the auxiliary switch swing arm (207) and a rotating shaft of the auxiliary switch (6), so that the rotating shaft of the auxiliary switch (6) rotates to a closing state; after the closing action is finished, the magnetic holding mechanism controller (7) disconnects the positive conduction loop of the energy storage capacitor (4) and the excitation coil, and the counter force is counteracted by the permanent magnetic holding force of the magnetic holding operating mechanism (3), so that the gas insulated circuit breaker cabinet is kept in the closing state.
When a magnetic holding mechanism controller (7) executes a switching-off operation, an energy storage capacitor (4) is controlled to be reversely connected with an excitation coil to conduct and discharge, the magnetic holding operating mechanism (3) performs a switching-off action, the holding force of the magnetic holding operating mechanism (3) is reduced, when the holding force of the magnetic holding operating mechanism (3) is lower than the combined force of the tensioning elastic force of an energy storage spring (5) and the switching-on counter force of an arc extinguish chamber in a gas insulated circuit breaker cabinet, the energy storage spring (5) releases the energy storage pulling force, the main shaft (201) generates reverse rotation motion through a switching-off energy storage spring pull rod (215) and a switching-off swing arm (214), and a moving shaft in the magnetic holding operating mechanism (3) generates downward linear motion through a switching-on swing arm (205), a switching-on driving connecting rod (213), a rocker (206), a rocker driving connecting rod (209; the auxiliary switch transmission plate (210), the auxiliary switch connecting rod (208) and the auxiliary switch swing arm (207) are driven to enable the rotating shaft of the auxiliary switch (6) to rotate to a brake-off state; the main shaft (201) drives the opening and closing indicating plate (202) to rotate to an opening indicating position, and drives the isolation knife locking swing arm (203) to rotate, so that the isolation knife locking transmission rod (212) exits from the isolation knife operation locking position.
The magnetic latching mechanism is characterized in that power is supplied, when an energy-stored indicator lamp (8) is lightened and a closing operation button (9) is pressed, a magnetic latching mechanism controller (7) controls an energy-stored capacitor (4) and an excitation coil of a magnetic latching operation mechanism (3) to be conducted in the forward direction, and the magnetic latching operation mechanism (3) generates closing operation; when the opening operation button (10) is pressed, the magnetic holding mechanism controller (7) controls the energy storage capacitor (4) and the excitation coil of the magnetic holding operation mechanism (3) to be conducted reversely, and the magnetic holding operation mechanism (3) generates opening operation. Event records and the working state of the circuit breaker can be consulted through the wired communication interface, and remote switching-on and switching-off operations are carried out. After the smart phone is wirelessly connected through the wireless communication interface, the smart phone can also look up the event record and the working state of the breaker to perform remote switching-on and switching-off operations. In an emergency situation, a manual socket wrench can be used for manually rotating the main shaft (201) through a hexagonal head at the front end of the main shaft (201) to perform emergency brake-off operation.
Drawings
Fig. 1 is a structural diagram of an electric control assembly of a magnetic latching operating mechanism for a gas insulated switchgear.
Fig. 2 is a left side view of an electric control assembly structure of a magnetic latching operating mechanism for a gas insulated switchgear.
Fig. 3 is a diagram of a mechanism mounting frame of an electric control assembly of a magnetic holding operating mechanism for a gas insulated circuit breaker cabinet.
Fig. 4 is a wiring diagram of an electric control assembly of a magnetic latching operating mechanism for a gas insulated switchgear.
Detailed Description
Referring to fig. 1 and 2, an electric control assembly of a magnetic latching mechanism for a gas insulated switchgear includes a mechanism mounting frame, a transmission mechanism set, a magnetic latching operating mechanism (3), an energy storage capacitor (4), an energy storage spring (5), an auxiliary switch (6), a magnetic latching mechanism controller (7), an energy stored indicator light (8), a closing operation button (9), a switching-off operation button (10), and a connection terminal row (11); the magnetic latching operating mechanism (3), the energy storage capacitor (4) and the energy storage spring (5) are arranged below a transverse plate (116) in the mechanism mounting frame, the transmission mechanism group and the auxiliary switch (6) are arranged above the transverse plate (116) in the mechanism mounting frame, the magnetic latching operating mechanism (3), the energy storage spring (5) and the auxiliary switch (6) are connected with each other through the transmission mechanism group, and a magnetic latching mechanism controller (7), an stored energy indicating lamp (8), a closing operation button (9), an opening operation button (10) and a wiring terminal row (11) are arranged on a controller mounting plate (111) in front of the mechanism mounting frame.
The transmission mechanism set comprises a main shaft (201), a switching-on and switching-off indicating plate (202), an isolation knife locking swing arm (203), a switching-on swing arm (205), a rocker (206), an auxiliary switch swing arm (207), an auxiliary switch connecting rod (208), an auxiliary switch transmission plate (210), a rocker driving connecting rod (209), a rocker driving connecting block (211), an isolation knife locking transmission rod (212), a switching-off swing arm (214), a switching-off energy storage spring pull rod (215) and a switching-on driving connecting rod (213); the main shaft (201) is fixedly arranged on a main shaft rear support (104) and a main shaft front support (118) of the mechanism mounting frame through a main shaft mounting plate (117) and a ball bearing (204), the front end of the main shaft (201) is a regular hexagonal column, a switching-off and switching-on indicating plate (202), an isolation knife locking swing arm (203), a switching-on swing arm (205) and a switching-off swing arm (214) are fixedly arranged from front to back in sequence, and the switching-on swing arm (205) is arranged between the main shaft rear support (104) and the main shaft front support (118); one end of a rocker (206) is hinged with a rocker support column (115), the other end of the rocker (206) is hinged with a closing swing arm (205) through a closing driving connecting rod (213), the middle of the rocker (206) is hinged with a rocker driving connecting block (211) through a rocker driving connecting rod (209), and the rocker driving connecting block (211) fixedly connects an auxiliary switch transmission plate (210) with a moving shaft of a magnetic latching operating mechanism (3); the auxiliary switch driving plate (210) is hinged with an auxiliary switch swing arm (207) through an auxiliary switch connecting rod (208), and the auxiliary switch swing arm (207) is fixedly installed with a rotating shaft of the auxiliary switch (6); the opening swing arm (214) is hinged with an opening energy storage spring pull rod (215), and the opening energy storage spring pull rod (215) penetrates through the energy storage spring baffle (105) and then is connected with an energy storage spring (5); the isolation knife locking transmission rod (212) is arranged right below the isolation knife locking swing arm (203).
Referring to fig. 3, the mechanism mounting frame includes a base plate (101), an auxiliary switch bracket (102), a fixing support column (103), a main shaft rear bracket (104), an energy storage spring limit plate (105), a brake-separating stopping vibration-damping pad (106), a transverse plate left bracket (107), an energy storage capacitance box (108), an energy storage spring baffle (109), a controller mounting plate left bracket (110), a controller mounting plate (111), a transverse plate right bracket (112), a controller mounting plate right lower bracket (113), a nut vibration-damping pad (114), a rocker support column (115), a transverse plate (116), a main shaft mounting plate (117), a main shaft front bracket (118) and a brake mounting plate right upper bracket (119); the energy storage spring baffle plate comprises a bottom plate (101), a controller mounting plate, a pressing device mounting plate, a transverse plate left support (107), a transverse plate right support (112), a controller mounting plate left support (110), a controller mounting plate right lower support (113) and a pressing device mounting plate right upper support (119), wherein the left side and the right side of the bottom plate (101) are respectively bent forwards to form the transverse plate left support (107), the transverse plate right support (119) is bent rightwards to form an energy storage spring baffle plate (105), the transverse plate (116) is arranged on the transverse plate left support (107) and the transverse plate right support (112), the inner side of the transverse plate left support is connected with the; the main shaft rear bracket (104), the main shaft front bracket (118) and the rocker strut (115) are fixedly welded with the transverse plate (116) above the transverse plate (116); two ends of the fixed strut (103) are respectively welded and fixed with the main shaft rear bracket (104) and the bottom plate (101); the method comprises the following steps that a fastening piece is used, an energy storage capacitance box (108) and an energy storage spring limiting plate (109) are installed in front of a bottom plate (101) and below a transverse plate (116), an auxiliary switch support (102) is installed in front of the bottom plate (101) and above the transverse plate (116), a separating brake stopping vibration damping pad (106) is installed on an energy storage spring baffle plate (105), a spindle installation plate (117) is installed in front of a spindle front support (118), a controller installation plate (111) is installed in front of a controller installation plate left support (110), a controller installation plate right lower support (113) and a pressing brake installation plate right upper support (119), and the controller installation plate (111) is connected with the spindle front support (118) through a nut vibration damping pad (114); the structure form has the outstanding advantage that the influence of vibration generated by the action of the magnetic retaining operating mechanism (3) on equipment arranged on the controller mounting plate (111) can be greatly reduced.
The energy storage capacitor (4) is formed by connecting a plurality of aluminum electrolytic capacitors with withstand voltage of more than 450V and capacity of 1000 muF-2000 muF in parallel, and is arranged in the energy storage capacitor box (108), and the total capacity of the energy storage capacitor (4) is equal to the sum of the capacities of the aluminum electrolytic capacitors connected in parallel.
The magnetic latching operating mechanism (3) is a monostable permanent magnet mechanism, when the magnetic latching operating mechanism is switched on, the switching-on direction (positive direction) of an excitation coil inside the magnetic latching operating mechanism is switched on an energy storage capacitor (4), the energy storage capacitor (4) discharges in the switching-on direction of the excitation coil, and a magnetic field generated by current in the switching-on direction in the excitation coil enables a movable iron core (armature) inside the magnetic latching operating mechanism (3) to overcome external force and to be switched on with a static iron core; after the movable iron core is attracted, a discharging loop of the energy storage capacitor (4) is cut off, the current in the closing direction of the excitation coil returns to zero, and the excitation magnetic field returns to zero, and at the moment, the magnetic field established by the permanent magnet in the magnetic latching operating mechanism (3) can enable the movable iron core to overcome the external force and keep the attraction state; when the switch is opened, the switch-off direction (reverse direction) of the excitation coil is connected with the energy storage capacitor (4), the energy storage capacitor (4) discharges in the switch-off direction of the excitation coil, a magnetic field generated by current in the switch-off direction of the excitation coil offsets a magnetic field established by a permanent magnet in the magnetic latching operating mechanism (3), the attraction force of the movable iron core disappears, and the movable iron core retreats to the switch-off state under the action of external force.
The magnetic latching mechanism controller (7) is responsible for controlling opening and closing actions of the magnetic latching operating mechanism (3), charging management of the energy storage capacitor (4), event recording, fault recording and wired and wireless data communication, and can upload local various state information of the circuit breaker and receive opening and closing operations or various information query instructions of a remote management center on the circuit breaker.
Referring to fig. 4, the magnetic holding mechanism controller (7) includes a microcomputer system, a power supply circuit, a charging circuit, a driving circuit, an input interface, an output interface, a wired communication interface, and a wireless communication interface; a wiring port of the magnetic latching mechanism controller (7) is respectively connected with an excitation coil, an energy storage capacitor (4), an auxiliary switch (6), an energy stored indicator lamp (8), a closing operation button (9), an opening operation button (10) and a wiring terminal row (11) in the magnetic latching operation mechanism (3) through wires; after the magnetic holding mechanism controller (7) is connected with an external DC 24V-DC 48V direct current power supply or an AC 85V-AC 265V alternating current power supply, a direct current high-voltage energy storage capacitor (4) charging power supply and a direct current low-voltage magnetic holding mechanism controller (7) internal circuit working power supply are generated through a power circuit, an input interface receives a closing operation button (9), a separating operation button (10) and closing state and separating state switch signals of an auxiliary switch (6), an output interface outputs stored energy indicating lamps (8) switch signals to indicate that the energy storage capacitor (4) is normally stored, a wireless communication interface and a wired communication interface are used for remote data exchange, remote separating and closing operations, after the wireless communication interface is wirelessly connected with a smart phone, data exchange, separating and closing operations can be carried out through the smart phone, a charging circuit controls the energy storage charging process of the energy storage capacitor (4), and a driving circuit controls a magnet exciting coil in the magnetic holding operation mechanism (3) to be connected with the energy storage capacitor (4) in a forward or reverse direction And (4) discharging.
The magnetic latching mechanism controller (7) controls the energy storage capacitor (4) to store energy in a charging mode, the stored energy is displayed to be normal by lighting the stored energy indicating lamp (8), a remote switch-off and switch-on control signal is received through the wiring terminal strip (11) or the wireless interface, a local operation signal of the switch-on operation button (9) and the switch-off operation button (10) is received, and the magnet exciting coil and the energy storage capacitor (4) in the magnetic latching operation mechanism (3) are controlled to be conducted in the forward direction and the reverse direction, so that the magnetic latching operation mechanism (3) generates switch-on and switch-off operations.
The magnetic latching mechanism is characterized in that power is supplied, when an energy-stored indicator lamp (8) is lightened and a closing operation button (9) is pressed, a magnetic latching mechanism controller (7) controls an energy-stored capacitor (4) and an excitation coil of a magnetic latching operation mechanism (3) to be conducted in the forward direction, and the magnetic latching operation mechanism (3) generates closing operation; when the opening operation button is pressed down, the magnetic latching mechanism controller (7) controls the energy storage capacitor (4) and the excitation coil of the magnetic latching operating mechanism (3) to be conducted reversely, and the magnetic latching operating mechanism (3) generates opening operation. Event records and the working state of the circuit breaker can be consulted through the wired communication interface, and remote switching-on and switching-off operations are carried out. After the smart phone is wirelessly connected through the wireless communication interface, the smart phone can also look up the event record and the working state of the breaker to perform remote switching-on and switching-off operations. In an emergency situation, a manual socket wrench can be used for manually rotating the main shaft (201) through a hexagonal head at the front end of the main shaft (201) to perform emergency brake-off operation.
When a magnetic holding mechanism controller (7) executes a closing operation, an energy storage capacitor (4) is controlled to be connected with an excitation coil in a forward direction to conduct and discharge, a magnetic holding operating mechanism (3) performs a closing action to offset the tensioning elasticity of an energy storage spring (5) and the closing counter force of an arc extinguish chamber in a gas insulated circuit breaker cabinet, a moving shaft in the magnetic holding operating mechanism (3) generates upward linear motion, a rocker driving connecting rod (209) and a rocker (206) are hinged through a rocker driving connecting block (211) fixed on the moving shaft, the rocker (206) with one end serving as a fixed fulcrum is pushed to swing upwards to drive a closing driving connecting rod (213) and a closing swing arm (205) hinged with the other end of the rocker (206), so that the closing swing arm (205) is linked with a main shaft (201) to rotate in a clockwise direction (forward direction), the main shaft (201) outputs forward rotary motion to drive the gas insulated circuit breaker, the main shaft (201) drives the connected opening swing arm (214) and the opening energy storage spring pull rod (215), the opening energy storage spring pull rod (215) tensions an energy storage spring (5) for storing energy, the main shaft (201) drives the opening and closing indicating plate (202) to rotate to a closing indicating position, the isolating knife locking swing arm (203) is driven to rotate, and the isolating knife locking transmission rod (212) is pushed to an isolating knife operation locking position; an auxiliary switch connecting rod (208) and an auxiliary switch swing arm (207) are hinged through an auxiliary switch transmission plate (210) fixed on the moving shaft to drive the auxiliary switch swing arm (207) and a rotating shaft of the auxiliary switch (6), so that the rotating shaft of the auxiliary switch (6) rotates to a closing state; after the closing action is finished, the magnetic holding mechanism controller (7) disconnects the positive conduction loop of the energy storage capacitor (4) and the excitation coil, and the counter force is counteracted by the permanent magnetic holding force of the magnetic holding operating mechanism (3), so that the gas insulated circuit breaker cabinet is kept in the closing state.
When a magnetic holding mechanism controller (7) executes a switching-off operation, an energy storage capacitor (4) is controlled to be reversely connected with an excitation coil to conduct and discharge, the magnetic holding operating mechanism (3) performs a switching-off action, the holding force of the magnetic holding operating mechanism (3) is reduced, when the holding force of the magnetic holding operating mechanism (3) is lower than the combined force of the tensioning elastic force of an energy storage spring (5) and the switching-on counter force of an arc extinguish chamber in a gas insulated circuit breaker cabinet, the energy storage spring (5) releases the energy storage pulling force, the main shaft (201) generates reverse rotation motion through a switching-off energy storage spring pull rod (215) and a switching-off swing arm (214), and a moving shaft in the magnetic holding operating mechanism (3) generates downward linear motion through a switching-on swing arm (205), a switching-on driving connecting rod (213), a rocker (206), a rocker driving connecting rod (209; the auxiliary switch transmission plate (210), the auxiliary switch connecting rod (208) and the auxiliary switch swing arm (207) are driven to enable the rotating shaft of the auxiliary switch (6) to rotate to a brake-off state; the main shaft (201) drives the opening and closing indicating plate (202) to rotate to an opening indicating position, and drives the isolation knife locking swing arm (203) to rotate, so that the isolation knife locking transmission rod (212) exits from the isolation knife operation locking position.
In addition, a microcomputer protection device is installed on the gas insulated circuit breaker cabinet, and referring to fig. 4, two signal lines output by tripping of the microcomputer protection device are respectively connected with a wiring terminal block (11), two groups of normally open contacts in an auxiliary switch (6) and two resistors in series in sequence, and then are connected to two ends of an excitation coil of a magnetic latching operating mechanism (3) according to a switching-off direction, so that the magnetic latching operating mechanism (3) can be directly controlled to generate switching-off operation; compared with the mode that the magnetic latching mechanism controller (7) reads the tripping current signal output by the microcomputer protection device and then controls the opening operation of the magnetic latching operating mechanism (3), the intermediate transmission judgment time is reduced, the action delay time can be shortened, the action speed is higher, and the requirement that the fault tripping time of the circuit breaker is as short as possible is met.
Claims (6)
1. An electric control assembly of a magnetic holding mechanism for a gas insulated circuit breaker cabinet is characterized by comprising a mechanism mounting frame, a transmission mechanism group, a magnetic holding operating mechanism (3), an energy storage capacitor (4), an energy storage spring (5), an auxiliary switch (6), a magnetic holding mechanism controller (7), an stored energy indicating lamp (8), a closing operation button (9), an opening operation button (10) and a wiring terminal row (11); the magnetic latching mechanism comprises a magnetic latching operating mechanism (3), an energy storage capacitor (4) and an energy storage spring (5), wherein the magnetic latching operating mechanism (3), the energy storage capacitor (4) and the energy storage spring (5) are arranged below a transverse plate (116) in a mechanism mounting frame, a transmission mechanism group and an auxiliary switch (6) are arranged above the transverse plate (116) in the mechanism mounting frame, the magnetic latching operating mechanism (3), the energy storage spring (5) and the auxiliary switch (6) are connected with each other through the transmission mechanism group, and a magnetic latching mechanism controller (7), an stored energy indicating lamp (8), a closing operation button (9), an opening operation button (10) and a wiring terminal row (11) are arranged on a controller mounting plate (111) right; a wiring port of the magnetic latching mechanism controller (7) is respectively connected with an excitation coil, an energy storage capacitor (4), an auxiliary switch (6), an energy stored indicator lamp (8), a closing operation button (9), an opening operation button (10) and a wiring terminal row (11) in the magnetic latching operation mechanism (3) through wires; the magnetic latching mechanism controller (7) controls the energy storage capacitor (4) to charge and store energy, an energy storage indicator lamp (8) displays that the energy storage is normal, a wiring terminal strip (11) or a wireless interface receives remote opening and closing control signals, local operation signals of a closing operation button (9) and an opening operation button (10) are received, and a magnet exciting coil in the magnetic latching operation mechanism (3) and the energy storage capacitor (4) are controlled to be conducted in the forward direction and the reverse direction, so that the magnetic latching operation mechanism (3) generates closing and opening operations; when a magnetic holding mechanism controller (7) executes a switching-on operation, an energy storage capacitor (4) is connected with an excitation coil in a forward direction to conduct and discharge, a magnetic holding operating mechanism (3) performs a switching-on action to offset the tensioning elastic force of an energy storage spring (5) and the switching-on counter force of an arc extinguish chamber in a gas insulation circuit breaker cabinet, a moving shaft in the magnetic holding operating mechanism (3) generates an upward linear motion, a main shaft (201) in a transmission mechanism group outputs a forward rotary motion through the transmission mechanism group to drive the gas insulation circuit breaker cabinet to perform a switching-on action and drive the energy storage spring (5) to strain energy storage, and meanwhile, the counter force is offset by the permanent magnetic holding force of the magnetic holding operating mechanism (3) to keep the gas insulation circuit breaker cabinet in a; when the magnetic holding mechanism controller (7) executes the opening operation, the energy storage capacitor (4) is reversely connected with the excitation coil to conduct and discharge, the magnetic holding operating mechanism (3) performs the opening operation, the holding force of the magnetic holding operating mechanism (3) is reduced, when the holding force of the magnetic holding operating mechanism (3) is lower than the resultant force of the tensioning elastic force of the energy storage spring (5) and the closing counter force of the arc extinguish chamber in the gas insulated breaker cabinet, the main shaft (201) in the transmission mechanism set generates reverse rotation motion, the moving shaft in the magnetic holding operating mechanism (3) generates downward linear motion through the transmission mechanism set, and the magnetic holding operating mechanism returns to the opening state.
2. The electric control assembly of the magnetic holding mechanism for the gas insulated switchgear cabinet according to claim 1, wherein the mechanism mounting frame comprises a bottom plate (101), an auxiliary switch bracket (102), a fixing support (103), a main shaft rear bracket (104), an energy storage spring limit plate (105), a brake-separating stop damping pad (106), a transverse plate left bracket (107), an energy storage capacitor box (108), an energy storage spring baffle (109), a controller mounting plate left bracket (110), a controller mounting plate (111), a transverse plate right bracket (112), a controller mounting plate right lower bracket (113), a nut damping pad (114), a rocker support (115), a transverse plate (116), a main shaft mounting plate (117), a main shaft front bracket (118) and a brake mounting plate right upper bracket (119); the energy storage spring baffle plate comprises a bottom plate (101), a controller mounting plate, a pressing device mounting plate, a transverse plate left support (107), a transverse plate right support (112), a controller mounting plate left support (110), a controller mounting plate right lower support (113) and a pressing device mounting plate right upper support (119), wherein the left side and the right side of the bottom plate (101) are respectively bent forwards to form the transverse plate left support (107), the transverse plate right support (119) is bent rightwards to form an energy storage spring baffle plate (105), the transverse plate (116) is arranged on the transverse plate left support (107) and the transverse plate right support (112), the inner side of the transverse plate left support is connected with the; the main shaft rear bracket (104), the main shaft front bracket (118) and the rocker strut (115) are fixedly welded with the transverse plate (116) above the transverse plate (116); two ends of the fixed strut (103) are respectively welded and fixed with the main shaft rear bracket (104) and the bottom plate (101); an energy storage capacitance box (108) and an energy storage spring limiting plate (109) are arranged in front of a base plate (101) and below a transverse plate (116) by using fasteners, an auxiliary switch bracket (102) is arranged in front of the base plate (101) and above the transverse plate (116), a separating brake stopping vibration damping pad (106) is arranged on an energy storage spring baffle plate (105), a main shaft mounting plate (117) is arranged in front of a main shaft front bracket (118), a controller mounting plate (111) is arranged in front of a controller mounting plate left bracket (110), a controller mounting plate right lower bracket (113) and a pressing device mounting plate right upper bracket (119), the controller mounting plate (111) is connected with the main shaft front bracket (118) through a nut vibration damping pad (114), the transverse plate left bracket (107), the transverse plate right bracket (112), the controller mounting plate left bracket (110), the controller mounting plate right lower bracket (113) and the pressing device mounting plate right upper bracket (119) are respectively connected with the base plate (101) except for bending parts, the other parts are not directly connected with each other.
3. The electric control assembly of the magnetic latching mechanism for the gas insulated switchgear cabinet according to claim 1, wherein the transmission mechanism set comprises a main shaft (201), a switch-on/off indicator plate (202), an isolation knife locking swing arm (203), a switch-on swing arm (205), a rocker (206), an auxiliary switch swing arm (207), an auxiliary switch connecting rod (208), an auxiliary switch transmission plate (210), a rocker driving connecting rod (209), a rocker driving connecting block (211), an isolation knife locking transmission rod (212), a switch-off swing arm (214), a switch-off energy storage spring pull rod (215), and a switch-on driving connecting rod (213); the main shaft (201) is fixedly arranged on a main shaft rear support (104) and a main shaft front support (118) of the mechanism mounting frame through a main shaft mounting plate (117) and a ball bearing (204), the front end of the main shaft (201) is a regular hexagonal column, a switching-off and switching-on indicating plate (202), an isolation knife locking swing arm (203), a switching-on swing arm (205) and a switching-off swing arm (214) are fixedly arranged from front to back in sequence, and the switching-on swing arm (205) is arranged between the main shaft rear support (104) and the main shaft front support (118); one end of a rocker (206) is hinged with a rocker support column (115), the other end of the rocker (206) is hinged with a closing swing arm (205) through a closing driving connecting rod (213), the middle of the rocker (206) is hinged with a rocker driving connecting block (211) through a rocker driving connecting rod (209), and the rocker driving connecting block (211) fixedly connects an auxiliary switch transmission plate (210) with a moving shaft of a magnetic latching operating mechanism (3); the auxiliary switch driving plate (210) is hinged with an auxiliary switch swing arm (207) through an auxiliary switch connecting rod (208), and the auxiliary switch swing arm (207) is fixedly installed with a rotating shaft of the auxiliary switch (6); the opening swing arm (214) is hinged with an opening energy storage spring pull rod (215), and the opening energy storage spring pull rod (215) penetrates through the energy storage spring baffle (105) and then is connected with an energy storage spring (5); the isolation knife locking transmission rod (212) is arranged right below the isolation knife locking swing arm (203).
4. The electric control assembly of the magnetic latching mechanism for the gas insulated circuit breaker cabinet according to claim 1, characterized in that the energy storage capacitor (4) is composed of a plurality of aluminum electrolytic capacitors with withstand voltage of more than 450V and capacity of 1000-2000 μ F in parallel, and is installed in the energy storage capacitor box (108), and the total capacity of the energy storage capacitor (4) is equal to the sum of the capacities of the aluminum electrolytic capacitors in parallel.
5. The electric control assembly of the magnetic latching mechanism for the gas insulated switchgear cabinet according to claim 1, wherein the magnetic latching mechanism controller (7) comprises a microcomputer system, a power circuit, a charging circuit, a driving circuit, an input interface, an output interface, a wired communication interface and a wireless communication interface; after the power is connected with an external DC 24V-DC 48V direct current power supply or an AC 85V-AC 265V alternating current power supply, a direct current high voltage energy storage capacitor (4) charging power supply and a direct current low voltage magnetic holding mechanism controller (7) internal circuit working power supply are generated by a power supply circuit, an input interface receives switching-on state and switching-off state switching signals of a switching-on operation button (9), a switching-off operation button (10) and an auxiliary switch (6), an output interface outputs switching signals of an energy-stored indicator light (8), a wireless communication interface and a wired communication interface are used for remote data exchange and remote switching-on and switching-off operations, and after the wireless communication interface is wirelessly connected with a smart phone, the intelligent mobile phone can perform data exchange, switching-on and switching-off operations, the charging circuit controls the energy storage charging process of the energy storage capacitor (4), and the driving circuit controls the excitation coil in the magnetic latching operating mechanism (3) to be connected with the energy storage capacitor (4) in the forward direction or the reverse direction for discharging.
6. The electrical control assembly of magnetic latching mechanism for gas insulated switchgear according to claim 1, wherein two signal lines of the trip control output of the microcomputer protection device are respectively connected in series with the terminal block (11), two sets of normally open contacts of the auxiliary switch (6), and two resistors, and then connected to two ends of the excitation coil of the magnetic latching actuator (3) in the opening direction, so as to directly control the magnetic latching actuator (3) to perform opening operation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736876.5A CN112447458A (en) | 2019-08-10 | 2019-08-10 | Magnetic holding mechanism electric control assembly for gas insulated circuit breaker cabinet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910736876.5A CN112447458A (en) | 2019-08-10 | 2019-08-10 | Magnetic holding mechanism electric control assembly for gas insulated circuit breaker cabinet |
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| CN112447458A true CN112447458A (en) | 2021-03-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102097225A (en) * | 2009-12-10 | 2011-06-15 | 浙宝电气(杭州)集团有限公司 | Breaker with permanent magnet mechanism |
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| WO2016008251A1 (en) * | 2014-07-17 | 2016-01-21 | 谢翠斌 | Modular breaker |
| CN106298360A (en) * | 2015-05-19 | 2017-01-04 | 亚洲电力设备(深圳)股份有限公司 | Permanent magnetic actuator vacuum separating brake closing device |
| CN210092018U (en) * | 2019-08-10 | 2020-02-18 | 胡春生 | Magnetic holding mechanism electric control assembly for gas insulated circuit breaker cabinet |
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2019
- 2019-08-10 CN CN201910736876.5A patent/CN112447458A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097225A (en) * | 2009-12-10 | 2011-06-15 | 浙宝电气(杭州)集团有限公司 | Breaker with permanent magnet mechanism |
| WO2016008251A1 (en) * | 2014-07-17 | 2016-01-21 | 谢翠斌 | Modular breaker |
| CN106298360A (en) * | 2015-05-19 | 2017-01-04 | 亚洲电力设备(深圳)股份有限公司 | Permanent magnetic actuator vacuum separating brake closing device |
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