A magnetic holding mechanism electric control assembly for a gas insulated circuit breaker cabinet

Abstract

The present invention discloses a magnetic holding mechanism electric control assembly for a gas-insulated circuit breaker cabinet, comprising a mechanism installation frame, a transmission mechanism group, a magnetic holding mechanism, an energy storage capacitor, an energy storage spring, an auxiliary switch, a magnetic holding mechanism controller, an energy storage indicator light, a closing operation button, an opening operation button and a terminal block. The magnetic holding mechanism controller, the energy storage capacitor, the magnetic holding mechanism, the auxiliary switch, the energy storage indicator light, the closing operation button, the opening operation button and the terminal block are connected by wires; the magnetic holding mechanism, the auxiliary switch and the energy storage spring are connected by a transmission mechanism group; the magnetic holding mechanism, the auxiliary switch and the energy storage spring are driven to attract and move the internal moving iron core through the magnetic field of the permanent magnet inside the magnetic holding mechanism and the positive current of the excitation coil, so as to operate the closing of the circuit breaker and maintain the closed state; when the reverse magnetic field is generated by the reverse current of the excitation coil to offset the magnetic field of the permanent magnet, the reaction force of the energy storage spring drives the circuit breaker to open.

Description

Technical Field

[0001] The invention relates to an operating mechanism used in a gas-insulated circuit breaker cabinet. Background Art

[0002] At present, gas-insulated circuit breaker cabinets are widely used in power transmission and distribution systems, and their operating mechanisms mainly use spring mechanisms. The spring mechanism is used on the gas-insulated circuit breaker cabinet and has a certain stability. It is very suitable for places where the number of operations is not large and remote control management is not required. However, with the development of technology, especially the development of Internet technology to this day, big data, cloud computing, and remote monitoring technology have reached a very high level. If these technologies are integrated into the management of the power system to achieve intelligent, information-based, and networked management, it is necessary for the switchgear in the power transmission and distribution system to adapt to the requirements of these technologies and realize the functions of telemetry and remote control. At present, directly transforming the existing spring mechanism to achieve remote management and control, the device composition is complex and there are also some unreliable factors during the implementation process. Summary of the invention

[0003] In order to adapt to the new development needs, combined with the latest technology, the magnetic holding operating mechanism is used as the driving device for the opening and closing of the circuit breaker, which has the advantages of simple and compact structure, few transmission parts, and good system durability. The magnetic holding mechanism controller controls the action of the magnetic holding operating mechanism to open and close the circuit breaker, store the on-site event information, and transmit the circuit breaker status information to the management center through a remote wired network or wireless network. The operation instructions of the management center are received to perform opening and closing operations, realizing the remote management and real-time control functions of the circuit breaker, and the structure is simple and the intelligent level is high. Through the tripping interface, the micro The tripping output of the machine protection device is connected to the excitation coil of the magnetic holding operating mechanism to realize direct driving of the circuit breaker fault tripping, which can reduce the judgment time of the magnetic holding mechanism controller reading the tripping output signal of the microcomputer protection device and the control tripping output time, and the circuit breaker fault tripping time is shorter; the maximum number of actions and long-term action stability of the magnetic holding operating mechanism are better than those of the spring mechanism; according to the installation structure of the existing gas insulated circuit breaker cabinet, the spring operating mechanism is directly replaced by the magnetic holding operating mechanism, and there is no need to change the overall design of the gas insulated circuit breaker cabinet, so that the improvement plan has better applicability and better cost performance.

[0004] The technical solution adopted by the present invention is:

[0005] A magnetic latching mechanism electric control assembly for a gas-insulated circuit breaker cabinet comprises a mechanism installation frame, a transmission mechanism group, a magnetic latching 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), an opening operation button (10) and a terminal block (11); wherein the magnetic latching mechanism (3), the energy storage capacitor (4) and the energy storage spring (5) are installed below a horizontal plate (116) in the mechanism installation frame, the transmission mechanism group and the auxiliary switch (6) are installed above the horizontal plate (116) in the mechanism installation frame, the magnetic latching mechanism (3), the energy storage spring (5) and the auxiliary switch (6) are connected to each other via the transmission mechanism group, and the magnetic latching mechanism controller (7), the energy stored indicator light (8), the closing operation button (9), the opening operation button (10) and the terminal block (11) are installed above the horizontal plate (116) in the mechanism installation frame. The terminal block (11) is mounted on a controller mounting plate (111) in front of the mechanism mounting frame; the wiring port of the magnetic latching mechanism controller (7) is respectively connected to the excitation coil, energy storage capacitor (4), auxiliary switch (6), energy storage indicator light (8), closing operation button (9), opening operation button (10) and the terminal block (11) in the magnetic latching operating mechanism (3) through wires; the magnetic latching mechanism controller (7) controls the energy storage capacitor (4) to charge and store energy, displays normal energy storage through the energy storage indicator light (8), receives remote opening and closing control signals through the terminal block (11) or the wireless interface, receives local operation signals from the closing operation button (9) and the opening operation button (10), controls the excitation coil and energy storage capacitor (4) in the magnetic latching operating mechanism (3) to conduct forward and reverse, and causes the magnetic latching operating mechanism (3) to generate closing and opening operations.

[0006] Furthermore, the mechanism installation frame comprises a base plate (101), an auxiliary switch bracket (102), a fixed support (103), a main shaft rear bracket (104), an energy storage spring limit plate (105), a gate opening stop vibration damping pad (106), a left support of a horizontal plate (107), an energy storage capacitor box (108), an energy storage spring baffle (109), a left support of a controller mounting plate (110), a controller mounting plate (111), a right support of a horizontal plate (112), a right lower support of a controller mounting plate (113), a nut vibration damping pad (114), a rocker support (115), a horizontal plate (116), a main shaft mounting plate (117), a front support of a main shaft (118) and an upper right support of a control device mounting plate The left and right sides of the bottom plate (101) are respectively bent forward to form a left horizontal plate bracket (107), a right horizontal plate bracket (112), a left controller mounting plate bracket (110), a right lower controller mounting plate bracket (113), and a right upper controller mounting plate bracket (119); the upper portion of the left horizontal plate bracket (107) connected to the bottom plate (101) is bent rightward to form an energy storage spring baffle (109); the horizontal plate (116) is placed on the left horizontal plate bracket (107) and the right horizontal plate bracket (112), and the inner side is connected to the bottom plate (101), and the four parts are welded and fixed; the main shaft rear bracket (104), the main shaft front bracket (118), and the rocker support (115) are on the horizontal plate ( The fixing support (103) is welded and fixed to the top of the transverse plate (116); the two ends of the fixing support (103) are respectively welded and fixed to the main shaft rear bracket (104) and the bottom plate (101); the energy storage capacitor box (108) and the energy storage spring limit plate (105) are installed in front of the bottom plate (101) and below the transverse plate (116) using fasteners; the auxiliary switch bracket (102) is installed in front of the bottom plate (101) and above the transverse plate (116); the opening brake stop vibration damping pad (106) is installed on the energy storage spring baffle (109); the main shaft mounting plate (117) is installed in front of the main shaft front bracket (118); the controller mounting plate (111) is installed on the left bracket (110) and the left bracket (111) of the controller mounting plate The controller mounting plate right lower bracket (113) and the control device mounting plate right upper bracket (119) are connected to the spindle front bracket (118) through a nut vibration-damping pad (114); the horizontal plate left bracket (107), the horizontal plate right bracket (112), the controller mounting plate left bracket (110), the controller mounting plate right lower bracket (113), and the control device mounting plate right upper bracket (119) are connected to the bottom plate (101) respectively at the bent parts, and the other parts are not directly connected to each other. This structural form has outstanding advantages and can greatly reduce the influence of the vibration generated by the action of the magnetic holding operating mechanism (3) on the equipment installed on the controller mounting plate (111).

[0007] The transmission mechanism group comprises a main shaft (201), an opening and closing indicator plate (202), an isolating knife locking swing arm (203), a closing 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 drive connecting rod (209), a rocker drive connecting block (211), an isolating knife locking transmission rod (212), an opening swing arm (214), and an opening energy storage spring pull rod (215). ), a closing drive connecting rod (213); wherein the main shaft (201) is fixedly mounted on a main shaft rear bracket (104) and a main shaft front bracket (118) of a mechanism mounting frame via a main shaft mounting plate (117) and a ball bearing (204); the front end of the main shaft (201) is a regular hexagonal column, and a closing and opening indicating plate (202), an isolating knife locking swing arm (203), a closing swing arm (205), and an opening swing arm (214) are fixedly mounted in sequence from front to back; A closing swing arm (205) is provided between the main shaft front bracket (118) and the auxiliary switch transmission plate (210); one end of the rocker (206) is hinged to the rocker support (115), and the other end is hinged to the closing swing arm (205) through a closing drive connecting rod (213); the middle is hinged to a rocker drive connecting block (211) through a rocker drive connecting rod (209); the rocker drive connecting block (211) fixes the auxiliary switch transmission plate (210) and the moving shaft of the magnetic holding operating mechanism (3); the auxiliary switch The closing transmission plate (210) is hingedly connected to the auxiliary switch swing arm (207) via the auxiliary switch connecting rod (208), and the auxiliary switch swing arm (207) is fixedly installed with the rotating shaft of the auxiliary switch (6); the opening swing arm (214) is hingedly connected to the opening energy storage spring pull rod (215), and the opening energy storage spring pull rod (215) passes through the energy storage spring baffle (109) and is connected to the energy storage spring (5); the isolating knife locking transmission rod (212) is arranged directly below the isolating knife locking swing arm (203).

[0008] The energy storage capacitor (4) is composed of a plurality of aluminum electrolytic capacitors with a withstand voltage greater than 450V and a capacity of 1000μF to 2000μF connected in parallel, and is installed in an energy storage capacitor box (108). The total capacity of the energy storage capacitor (4) is equal to the total capacity of the parallel aluminum electrolytic capacitors.

[0009] The magnetic holding mechanism controller (7) is responsible for the opening and closing action control of the magnetic holding operating mechanism (3), the charging management of the energy storage capacitor (4), event recording, fault recording, wired and wireless data communication, and can upload various local status information of the circuit breaker and receive the opening and closing operation or various information query instructions of the circuit breaker from the remote management center; the internal part of the magnetic holding mechanism controller (7) includes a microcomputer system, a power supply circuit, a charging circuit, a drive circuit, an input interface, an output interface, a wired communication interface and a wireless communication interface; after the magnetic holding mechanism controller (7) is connected to an external DC24V~DC48V DC power supply or AC85V~AC265V AC power supply, a DC high voltage energy storage capacitor (4) charging power and a DC high voltage energy storage capacitor (4) charging power are generated through the power supply circuit. The DC low-voltage magnetic holding mechanism controller (7) has an internal circuit working power supply, an input interface for receiving switch signals such as the closing state and the opening state of the closing operation button (9), the opening operation button (10), and the auxiliary switch (6), an output interface for outputting a switch signal of an energy-stored indicator light (8) indicating that the energy storage capacitor (4) is storing energy normally, a wireless communication interface and a wired communication interface for remote data exchange and remote opening and closing operations, after the wireless communication interface is wirelessly connected to a smart phone, data exchange and opening and closing operations can be performed through the smart phone, a charging circuit controls the energy storage charging process of the energy storage capacitor (4), and a drive circuit controls the excitation coil in the magnetic holding operating mechanism (3) to connect the energy storage capacitor (4) in the forward or reverse direction to discharge.

[0010] In addition, in the microcomputer protection device installed on the gas-insulated circuit breaker cabinet, the two signal lines of the trip output of the microcomputer protection device are respectively connected in series to the terminal block (11), the two groups of normally open contacts in the auxiliary switch (6), and the two resistors, and then connected to the two ends of the excitation coil of the magnetic holding operating mechanism (3) in the opening direction, so that the magnetic holding operating mechanism (3) can be directly controlled to produce an opening operation. Compared with the method in which the magnetic holding mechanism controller (7) reads the trip current signal output by the microcomputer protection device and then controls the opening operation of the magnetic holding operating mechanism (3), the intermediate transmission judgment time is reduced, the action delay time can be shortened, and the action speed is faster, which meets the requirement of minimizing the trip time of the circuit breaker fault.

[0011] The magnetic holding operating mechanism (3) is a monostable permanent magnet mechanism. When the operation is closed, the internal excitation coil is connected to the energy storage capacitor (4) in the closing direction (forward direction). The energy storage capacitor (4) is discharged in the closing direction of the excitation coil. The magnetic field generated by the closing direction current in the excitation coil causes the internal moving iron core (armature) of the magnetic holding operating mechanism (3) to overcome the external force and be attracted to the static iron core. After the moving iron core is attracted, the discharge circuit of the energy storage capacitor (4) is cut off, the closing direction current of the excitation coil returns to zero, and the excitation magnetic field returns to zero. At this time, the magnetic field established by the internal permanent magnet of the magnetic holding operating mechanism (3) can enable the moving iron core to overcome the external force and maintain the attracted state. When the operation is opened, the excitation coil is connected to the energy storage capacitor (4) in the opening direction (reverse direction). The energy storage capacitor (4) is discharged in the opening direction of the excitation coil. The magnetic field generated by the opening direction current of the excitation coil cancels the magnetic field established by the internal permanent magnet of the magnetic holding operating mechanism (3). The attraction force of the moving iron core disappears, and under the action of the external force, it retreats to the open state.

[0012] When the magnetic holding mechanism controller (7) performs a closing operation, it controls the energy storage capacitor (4) to be connected to the excitation coil in the forward direction to conduct and discharge, and the magnetic holding operating mechanism (3) performs a closing action, thereby offsetting the tensioning elastic force of the energy storage spring (5) and the closing reaction force of the arc extinguishing chamber in the gas-insulated circuit breaker cabinet. The moving shaft in the magnetic holding operating mechanism (3) generates an upward linear motion, and the rocker driving connecting block (211) fixed on the moving shaft is hinged to the rocker driving connecting rod (209) and the rocker (206), so as to push the rocker (206) with the rocker support (115) as a fixed fulcrum at one end to swing upward, thereby driving the closing driving connecting rod (213) and the closing swing arm (205) hinged to the other end of the rocker (206), so that the closing swing arm (205) and the main shaft (201) rotate in a clockwise direction (forward direction), and the main shaft (201) outputs a forward rotational motion, driving the gas-insulated circuit breaker cabinet to close, and the main shaft (201) drives The connected opening switch swing arm (214) and opening switch energy storage spring pull rod (215) are used to store energy by tightening the energy storage spring (5) by the opening switch energy storage spring pull rod (215). The main shaft (201) drives the opening and closing switch indication plate (202) to rotate to the closing switch indication position, drives the isolating knife locking swing arm (203) to rotate, and pushes the isolating knife locking transmission rod (212) to the isolating knife operation locking position; the auxiliary switch connecting rod (208) and the auxiliary switch swing arm (207) are hingedly connected through the auxiliary switch transmission plate (210) fixed on the motion shaft, drives the auxiliary switch swing arm (207) and the rotating shaft of the auxiliary switch (6), and causes the rotating shaft of the auxiliary switch (6) to rotate to the closing state; after the closing action is completed, the magnetic holding mechanism controller (7) disconnects the forward conduction circuit of the energy storage capacitor (4) and the excitation coil, and the permanent magnetic holding force of the magnetic holding operating mechanism (3) offsets the reaction force, so that the gas insulated circuit breaker cabinet is kept in the closing state.

[0013] When the magnetic holding mechanism controller (7) performs the opening operation, it controls the energy storage capacitor (4) to reversely connect the excitation coil to conduct and discharge, the magnetic holding operating mechanism (3) opens, the holding force of the magnetic holding operating mechanism (3) decreases, and when the holding force of the magnetic holding operating mechanism (3) is lower than the combined force of the tensioning elastic force of the energy storage spring (5) and the closing reaction force of the arc extinguishing chamber in the gas-insulated circuit breaker cabinet, the energy storage spring (5) releases the energy storage tension, and the main shaft (201) generates a reverse rotation motion through the opening energy storage spring pull rod (215) and the opening swing arm (214), and the closing swing arm (205) and the closing drive connecting rod (2 13), the rocker (206), the rocker drive connecting rod (209), and the rocker drive connecting block (211), so that the moving shaft in the magnetic holding operating mechanism (3) generates a downward linear motion and returns to the open state; and drives the auxiliary switch transmission plate (210), the auxiliary switch connecting rod (208), and the auxiliary switch swing arm (207), so that the auxiliary switch (6) rotating shaft rotates to the open state; the main shaft (201) drives the opening and closing indicator plate (202) to rotate to the open indication position, drives the isolating knife locking swing arm (203) to rotate, and causes the isolating knife locking transmission rod (212) to exit the isolating knife operation locking position.

[0014] When the power supply is on and the energy storage indicator light (8) is on, when the closing operation button (9) is pressed, the magnetic holding mechanism controller (7) controls the energy storage capacitor (4) and the excitation coil of the magnetic holding operating mechanism (3) to be forward-conducted, and the magnetic holding operating mechanism (3) performs a 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 operating mechanism (3) to be reverse-conducted, and the magnetic holding operating mechanism (3) performs an opening operation. The event record and the circuit breaker working status can be checked through the wired communication interface, and the opening and closing operations can be performed remotely. After the smart phone is wirelessly connected through the wireless communication interface, the event record and the circuit breaker working status can also be checked, and the opening and closing operations can be performed remotely. In an emergency, a manual socket wrench can be used to manually rotate the main shaft (201) through the hexagonal head at the front end of the main shaft (201) to perform an emergency opening operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural diagram of an electric control assembly of a magnetic holding actuator for a gas insulated circuit breaker cabinet.

[0016] Figure 2 A left side view of the electric control assembly structure of a magnetic holding actuator for a gas insulated circuit breaker cabinet.

[0017] Figure 3 A mechanism installation framework diagram of an electric control assembly of a magnetic latching actuator for a gas insulated circuit breaker cabinet.

[0018] Figure 4A wiring diagram of an electric control assembly of a magnetic latching actuator for a gas insulated circuit breaker cabinet. DETAILED DESCRIPTION

[0019] Comparison Figure 1 , Figure 2 A magnetic latching mechanism electric control assembly for a gas-insulated circuit breaker cabinet comprises a mechanism installation frame, a transmission mechanism group, a magnetic latching 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), an opening operation button (10) and a terminal block (11); wherein the magnetic latching mechanism (3), the energy storage capacitor (4) and the energy storage spring (5) are installed below a horizontal plate (116) in the mechanism installation frame, the transmission mechanism group and the auxiliary switch (6) are installed above the horizontal plate (116) in the mechanism installation frame, the magnetic latching mechanism (3), the energy storage spring (5) and the auxiliary switch (6) are connected to each other through the transmission mechanism group, and the magnetic latching mechanism controller (7), the energy stored indicator light (8), the closing operation button (9), the opening operation button (10) and the terminal block (11) are installed on a controller installation plate (111) directly in front of the mechanism installation frame.

[0020] The transmission mechanism group comprises a main shaft (201), an opening and closing indicator plate (202), an isolating knife locking swing arm (203), a closing 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 drive connecting rod (209), a rocker drive connecting block (211), an isolating knife locking transmission rod (212), an opening swing arm (214), and an opening energy storage spring pull rod (215). ), a closing drive connecting rod (213); wherein the main shaft (201) is fixedly mounted on a main shaft rear bracket (104) and a main shaft front bracket (118) of a mechanism mounting frame via a main shaft mounting plate (117) and a ball bearing (204); the front end of the main shaft (201) is a regular hexagonal column, and a closing and opening indicating plate (202), an isolating knife locking swing arm (203), a closing swing arm (205), and an opening swing arm (214) are fixedly mounted in sequence from front to back; A closing swing arm (205) is provided between the main shaft front bracket (118) and the auxiliary switch transmission plate (210); one end of the rocker (206) is hinged to the rocker support (115), and the other end is hinged to the closing swing arm (205) through a closing drive connecting rod (213); the middle is hinged to a rocker drive connecting block (211) through a rocker drive connecting rod (209); the rocker drive connecting block (211) fixes the auxiliary switch transmission plate (210) and the moving shaft of the magnetic holding operating mechanism (3); the auxiliary switch The closing transmission plate (210) is hingedly connected to the auxiliary switch swing arm (207) via the auxiliary switch connecting rod (208), and the auxiliary switch swing arm (207) is fixedly installed with the rotating shaft of the auxiliary switch (6); the opening swing arm (214) is hingedly connected to the opening energy storage spring pull rod (215), and the opening energy storage spring pull rod (215) passes through the energy storage spring baffle (109) and is connected to the energy storage spring (5); the isolating knife locking transmission rod (212) is arranged directly below the isolating knife locking swing arm (203).

[0021] Comparison Figure 3The mechanism installation frame includes a base plate (101), an auxiliary switch bracket (102), a fixed support (103), a main shaft rear support (104), an energy storage spring limit plate (105), a gate stop vibration damping pad (106), a left horizontal plate 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 right horizontal plate bracket (112), a controller mounting plate right lower bracket (113), a nut vibration damping pad (114), a rocker support (115), a horizontal plate (116), a main shaft mounting plate (117), a main shaft front bracket (118) and a control device mounting plate right upper bracket (119). 119); wherein the left and right sides of the bottom plate (101) are respectively bent forward to form a left horizontal plate bracket (107), a right horizontal plate bracket (112), a left controller mounting plate bracket (110), a right lower controller mounting plate bracket (113), and a right upper controller mounting plate bracket (119); the upper portion of the left horizontal plate bracket (107) connected to the bottom plate (101) is bent rightward to form an energy storage spring baffle (109); the horizontal plate (116) is placed on the left horizontal plate bracket (107) and the right horizontal plate bracket (112), and the inner side is connected to the bottom plate (101), and the four parts are welded and fixed; the spindle rear bracket (104), the spindle front bracket (118), and the rocker support (115) are on the horizontal plate (11 6) is welded and fixed to the transverse plate (116) at the top; the two ends of the fixed support (103) are respectively welded and fixed to the main shaft rear support (104) and the bottom plate (101); using fasteners, the energy storage capacitor box (108) and the energy storage spring limit plate (105) are installed in front of the bottom plate (101) and below the transverse plate (116); the auxiliary switch bracket (102) is installed in front of the bottom plate (101) and above the transverse plate (116); the opening brake stop vibration damping pad (106) is installed on the energy storage spring baffle (109); the main shaft mounting plate (117) is installed in front of the main shaft front support (118); the controller mounting plate (111) is installed on the left support (110) of the controller mounting plate, the controller mounting plate (111) is installed on the left support (110) of the controller mounting plate, and the controller mounting plate (112) is installed on the left support (111) of the controller mounting plate. The controller mounting plate (111) is connected to the spindle front bracket (118) via a nut vibration-damping pad (114) in front of the lower right bracket (113) of the controller mounting plate and the upper right bracket (119) of the controller mounting plate; except for the bending parts of the left bracket (107) of the horizontal plate, the right bracket (112) of the horizontal plate, the left bracket (110) of the controller mounting plate, the lower right bracket (113) of the controller mounting plate, and the upper right bracket (119) of the controller mounting plate, which are respectively connected to the bottom plate (101), the other parts are not directly connected to each other. This structural form has outstanding advantages and can greatly reduce the influence of the vibration generated by the action of the magnetic holding operating mechanism (3) on the equipment installed on the controller mounting plate (111).

[0022] The energy storage capacitor (4) is composed of a plurality of aluminum electrolytic capacitors with a withstand voltage greater than 450V and a capacity of 1000μF to 2000μF connected in parallel, and is installed in an energy storage capacitor box (108). The total capacity of the energy storage capacitor (4) is equal to the total capacity of the parallel aluminum electrolytic capacitors.

[0023] The magnetic holding operating mechanism (3) is a monostable permanent magnet mechanism. When the operation is closed, the internal excitation coil is connected to the energy storage capacitor (4) in the closing direction (forward direction). The energy storage capacitor (4) is discharged in the closing direction of the excitation coil. The magnetic field generated by the closing direction current in the excitation coil causes the internal moving iron core (armature) of the magnetic holding operating mechanism (3) to overcome the external force and be attracted to the static iron core. After the moving iron core is attracted, the discharge circuit of the energy storage capacitor (4) is cut off, the closing direction current of the excitation coil returns to zero, and the excitation magnetic field returns to zero. At this time, the magnetic field established by the internal permanent magnet of the magnetic holding operating mechanism (3) can enable the moving iron core to overcome the external force and maintain the attracted state. When the operation is opened, the excitation coil is connected to the energy storage capacitor (4) in the opening direction (reverse direction). The energy storage capacitor (4) is discharged in the opening direction of the excitation coil. The magnetic field generated by the opening direction current of the excitation coil cancels the magnetic field established by the internal permanent magnet of the magnetic holding operating mechanism (3). The attraction force of the moving iron core disappears, and under the action of the external force, it retreats to the open state.

[0024] The magnetic holding mechanism controller (7) is responsible for the opening and closing action control of the magnetic holding operating mechanism (3), the charging management of the energy storage capacitor (4), event recording, fault recording, wired and wireless data communication, and can upload various local status information of the circuit breaker and receive the opening and closing operation or various information query instructions of the circuit breaker from the remote management center.

[0025] Comparison Figure 4The magnetic holding mechanism controller (7) includes a microcomputer system, a power supply circuit, a charging circuit, a drive circuit, an input interface, an output interface, a wired communication interface and a wireless communication interface; the connection port of the magnetic holding mechanism controller (7) is respectively connected to the excitation coil, the energy storage capacitor (4), the auxiliary switch (6), the energy storage indicator light (8), the closing operation button (9), the opening operation button (10) and the terminal block (11) in the magnetic holding mechanism operating mechanism (3) through wires; after the magnetic holding mechanism controller (7) is connected to an external DC24V~DC48V DC power supply or AC85V~AC265V AC power supply, a DC high voltage energy storage capacitor (4) charging power supply and a DC The low-voltage magnetic holding mechanism controller (7) has an internal circuit working power supply, an input interface receiving the closing state and opening state switch signals of the closing operation button (9), the opening operation button (10), and the auxiliary switch (6), an output interface outputting a switch signal of the energy storage indicator light (8) indicating that the energy storage capacitor (4) is storing energy normally, a wireless communication interface and a wired communication interface for remote data exchange and remote opening and closing operations, after the wireless communication interface is wirelessly connected to a smart phone, data exchange and opening and closing operations can be performed through the smart phone, a charging circuit controls the energy storage charging process of the energy storage capacitor (4), and a drive circuit controls the excitation coil in the magnetic holding operating mechanism (3) to connect the energy storage capacitor (4) in the forward or reverse direction to discharge.

[0026] The magnetic holding mechanism controller (7) controls the energy storage capacitor (4) to charge and store energy, and displays that the energy storage is normal by lighting up the energy storage indicator light (8). It receives remote opening and closing control signals through the terminal block (11) or the wireless interface, receives local operation signals from the closing operation button (9) and the opening operation button (10), and controls the excitation coil and the energy storage capacitor (4) in the magnetic holding operating mechanism (3) to conduct forward and reverse, so that the magnetic holding operating mechanism (3) generates closing and opening operations.

[0027] When the power supply is on and the energy storage indicator light (8) is on, when the closing operation button (9) is pressed, the magnetic holding mechanism controller (7) controls the energy storage capacitor (4) and the excitation coil of the magnetic holding operating mechanism (3) to be forward-conducted, and the magnetic holding operating mechanism (3) performs a closing operation; when the opening operation button is pressed, the magnetic holding mechanism controller (7) controls the energy storage capacitor (4) and the excitation coil of the magnetic holding operating mechanism (3) to be reverse-conducted, and the magnetic holding operating mechanism (3) performs an opening operation. The event record and the circuit breaker working status can be checked through the wired communication interface, and the opening and closing operations can be performed remotely. After the smart phone is wirelessly connected through the wireless communication interface, the event record and the circuit breaker working status can also be checked, and the opening and closing operations can be performed remotely. In an emergency, a manual socket wrench can be used to manually rotate the main shaft (201) through the hexagonal head at the front end of the main shaft (201) to perform an emergency opening operation.

[0028] When the magnetic holding mechanism controller (7) performs a closing operation, it controls the energy storage capacitor (4) to be connected to the excitation coil in the forward direction to conduct and discharge, and the magnetic holding operating mechanism (3) performs a closing action, thereby offsetting the tensioning elastic force of the energy storage spring (5) and the closing reaction force of the arc extinguishing chamber in the gas-insulated circuit breaker cabinet. The moving shaft in the magnetic holding operating mechanism (3) generates an upward linear motion, and the rocker driving connecting block (211) fixed on the moving shaft is hinged to the rocker driving connecting rod (209) and the rocker (206), so as to push the rocker (206) with the rocker support (115) as a fixed fulcrum at one end to swing upward, thereby driving the closing driving connecting rod (213) and the closing swing arm (205) hinged to the other end of the rocker (206), so that the closing swing arm (205) and the main shaft (201) rotate in a clockwise direction (forward direction), and the main shaft (201) outputs a forward rotational motion, driving the gas-insulated circuit breaker cabinet to close, and the main shaft (201) drives The connected opening switch swing arm (214) and opening switch energy storage spring pull rod (215) are used to store energy by tightening the energy storage spring (5) by the opening switch energy storage spring pull rod (215). The main shaft (201) drives the opening and closing switch indication plate (202) to rotate to the closing switch indication position, drives the isolating knife locking swing arm (203) to rotate, and pushes the isolating knife locking transmission rod (212) to the isolating knife operation locking position; the auxiliary switch connecting rod (208) and the auxiliary switch swing arm (207) are hingedly connected through the auxiliary switch transmission plate (210) fixed on the motion shaft, drives the auxiliary switch swing arm (207) and the rotating shaft of the auxiliary switch (6), and causes the rotating shaft of the auxiliary switch (6) to rotate to the closing state; after the closing action is completed, the magnetic holding mechanism controller (7) disconnects the forward conduction circuit of the energy storage capacitor (4) and the excitation coil, and the permanent magnetic holding force of the magnetic holding operating mechanism (3) offsets the reaction force, so that the gas insulated circuit breaker cabinet is kept in the closing state.

[0029] When the magnetic holding mechanism controller (7) performs the opening operation, it controls the energy storage capacitor (4) to reversely connect the excitation coil to conduct and discharge, the magnetic holding operating mechanism (3) opens, the holding force of the magnetic holding operating mechanism (3) decreases, and when the holding force of the magnetic holding operating mechanism (3) is lower than the combined force of the tensioning elastic force of the energy storage spring (5) and the closing reaction force of the arc extinguishing chamber in the gas-insulated circuit breaker cabinet, the energy storage spring (5) releases the energy storage tension, and the main shaft (201) generates a reverse rotation motion through the opening energy storage spring pull rod (215) and the opening swing arm (214), and the closing swing arm (205) and the closing drive connecting rod (2 13), the rocker (206), the rocker drive connecting rod (209), and the rocker drive connecting block (211), so that the moving shaft in the magnetic holding operating mechanism (3) generates a downward linear motion and returns to the open state; and drives the auxiliary switch transmission plate (210), the auxiliary switch connecting rod (208), and the auxiliary switch swing arm (207), so that the auxiliary switch (6) rotating shaft rotates to the open state; the main shaft (201) drives the opening and closing indicator plate (202) to rotate to the open indication position, drives the isolating knife locking swing arm (203) to rotate, and causes the isolating knife locking transmission rod (212) to exit the isolating knife operation locking position.

[0030] In addition, the microcomputer protection device installed on the gas insulated circuit breaker cabinet is compared with Figure 4 The two signal lines of the tripping output of the microcomputer protection device are respectively connected in series to the terminal block (11), two groups of normally open contacts in the auxiliary switch (6), and two resistors, and then connected to the two ends of the excitation coil of the magnetic holding operating mechanism (3) in the opening direction, so that the magnetic holding operating mechanism (3) can be directly controlled to produce an opening operation; compared with the method in which the magnetic holding mechanism controller (7) reads the tripping current signal output by the microcomputer protection device and then controls the opening operation of the magnetic holding operating mechanism (3), the intermediate transmission judgment time is reduced, the action delay time can be shortened, the action speed is faster, and the requirement of minimizing the tripping time of the circuit breaker fault is met.

Claims

1. A magnetic latching mechanism electric control assembly for a gas insulated circuit breaker cabinet, characterized in that The invention comprises a mechanism installation 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 energy storage indicator light (8), a closing operation button (9), an opening operation button (10) and a terminal block (11); wherein the magnetic holding operating mechanism (3), the energy storage capacitor (4) and the energy storage spring (5) are installed below a horizontal plate (116) in the mechanism installation frame, the transmission mechanism group and the auxiliary switch (6) are installed above the horizontal plate (116) in the mechanism installation frame, the magnetic holding operating mechanism (3), the energy storage spring (5) and the auxiliary switch (6) are connected to each other through the transmission mechanism group, and the magnetic holding mechanism controller (7), the energy storage spring (5) and the auxiliary switch (6) are connected to each other through the transmission mechanism group. The energy storage indicator light (8), the closing operation button (9), the opening operation button (10) and the terminal block (11) are installed on the controller mounting plate (111) in front of the mechanism mounting frame; the wiring port of the magnetic holding mechanism controller (7) is respectively connected to the excitation coil, the energy storage capacitor (4), the auxiliary switch (6), the energy storage indicator light (8), the closing operation button (9), the opening operation button (10) and the terminal block (11) in the magnetic holding operating mechanism (3) through wires; the magnetic holding mechanism controller (7) controls the energy storage capacitor (4) to charge and store energy, displays normal energy storage through the energy storage indicator light (8), receives remote opening and closing control signals through the terminal block (11) or the wireless interface, and receives the closing signal. The local operation signals of the switch operation button (9) and the opening operation button (10) control the forward and reverse conduction of the excitation coil and the energy storage capacitor (4) in the magnetic holding operating mechanism (3), so that the magnetic holding operating mechanism (3) performs the closing and opening operations; when the magnetic holding mechanism controller (7) performs the closing operation, the energy storage capacitor (4) is forwardly connected to the excitation coil to conduct and discharge, and the magnetic holding operating mechanism (3) performs the closing action, which offsets the tensioning elastic force of the energy storage spring (5) and the closing reaction force of the arc extinguishing chamber in the gas-insulated circuit breaker cabinet, and the moving shaft in the magnetic holding operating mechanism (3) generates an upward linear motion, and through the transmission mechanism group, the main shaft (201) in the transmission mechanism group outputs a positive rotational motion, driving the gas-insulated circuit breaker cabinet to close. , driving the energy storage spring (5) to tighten and store energy, while the permanent magnetic holding force of the magnetic holding operating mechanism (3) offsets the reaction force, so that the gas-insulated circuit breaker cabinet is kept in the closed state; when the magnetic holding mechanism controller (7) performs the opening operation, the energy storage capacitor (4) is reversely connected to the excitation coil to conduct and discharge, the magnetic holding operating mechanism (3) opens, and the holding force of the magnetic holding operating mechanism (3) decreases. When the holding force of the magnetic holding operating mechanism (3) is lower than the combined force of the tensioning elastic force of the energy storage spring (5) and the closing reaction force of the arc extinguishing chamber in the gas-insulated circuit breaker cabinet, the main shaft (201) in the transmission mechanism group generates reverse rotational motion, and the moving shaft in the magnetic holding operating mechanism (3) generates downward linear motion through the transmission mechanism group, and returns to the open state.

2. According to claim 1, the magnetic latching mechanism electric control assembly for a gas insulated circuit breaker cabinet is characterized in that The mechanism installation frame comprises a base plate (101), an auxiliary switch bracket (102), a fixed support (103), a main shaft rear bracket (104), an energy storage spring limit plate (105), a switch opening stop vibration damping pad (106), a left cross plate 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 right cross plate bracket (112), a right lower bracket of the controller mounting plate (113), a nut vibration damping pad (114), a rocker support (115), a cross plate (116), a main shaft mounting plate (117), and a main shaft front bracket (11 8) and a right upper bracket (119) of a control mounting plate; wherein the left and right sides of the bottom plate (101) are respectively bent forward to form a left bracket (107) of a horizontal plate, a right bracket (112) of a horizontal plate, a left bracket (110) of a controller mounting plate, a right lower bracket (113) of a controller mounting plate, and an upper right bracket (119) of a control mounting plate; the upper part of the left bracket (107) of the horizontal plate connected to the bottom plate (101) is bent rightward to form an energy storage spring baffle (109); the horizontal plate (116) is placed on the left bracket (107) of the horizontal plate and the right bracket (112), and the inner side is connected to the bottom plate (101), and the four parts are welded and fixed; the rear bracket (107) of the main shaft 04), the main shaft front bracket (118), the rocker support (115) are welded and fixed to the transverse plate (116) above the transverse plate (116); the two ends of the fixed support (103) are respectively welded and fixed to the main shaft rear bracket (104) and the bottom plate (101); using fasteners, the energy storage capacitor box (108) and the energy storage spring limit plate (105) are installed in front of the bottom plate (101) and below the transverse plate (116); the auxiliary switch bracket (102) is installed in front of the bottom plate (101) and above the transverse plate (116); the gate stop vibration damping pad (106) is installed on the energy storage spring baffle (109); the main shaft mounting plate (117) The controller mounting plate (111) is mounted in front of the spindle front bracket (118), the controller mounting plate left bracket (110), the controller mounting plate right lower bracket (113), and the control device mounting plate right upper bracket (119), the controller mounting plate (111) is connected to the spindle front bracket (118) through a nut vibration-damping pad (114), and 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 control device mounting plate right upper bracket (119) are not directly connected to each other except for the bent parts which are connected to the bottom plate (101).

3. The magnetic latching mechanism electric control assembly for a gas insulated circuit breaker cabinet according to claim 1, characterized in that The transmission mechanism group comprises a main shaft (201), an opening and closing indicator plate (202), an isolating knife locking swing arm (203), a closing 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 drive connecting rod (209), a rocker drive connecting block (211), an isolating knife locking transmission rod (212), an opening swing arm (214), and an opening energy storage spring pull rod (215). ), a closing drive connecting rod (213); wherein the main shaft (201) is fixedly mounted on a main shaft rear bracket (104) and a main shaft front bracket (118) of a mechanism mounting frame via a main shaft mounting plate (117) and a ball bearing (204); the front end of the main shaft (201) is a regular hexagonal column, and a closing and opening indicating plate (202), an isolating knife locking swing arm (203), a closing swing arm (205), and an opening swing arm (214) are fixedly mounted in sequence from front to back; A closing swing arm (205) is provided between the main shaft front bracket (118) and the auxiliary switch transmission plate (210); one end of the rocker (206) is hinged to the rocker support (115), and the other end is hinged to the closing swing arm (205) through a closing drive connecting rod (213); the middle is hinged to a rocker drive connecting block (211) through a rocker drive connecting rod (209); the rocker drive connecting block (211) fixes the auxiliary switch transmission plate (210) and the moving shaft of the magnetic holding operating mechanism (3); the auxiliary switch The closing transmission plate (210) is hingedly connected to the auxiliary switch swing arm (207) via the auxiliary switch connecting rod (208), and the auxiliary switch swing arm (207) is fixedly installed with the rotating shaft of the auxiliary switch (6); the opening swing arm (214) is hingedly connected to the opening energy storage spring pull rod (215), and the opening energy storage spring pull rod (215) passes through the energy storage spring baffle (109) and is connected to the energy storage spring (5); the isolating knife locking transmission rod (212) is arranged directly below the isolating knife locking swing arm (203).

4. The magnetic latching mechanism electric control assembly for a 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 a withstand voltage greater than 450V and a capacity of 1000μF to 2000μF connected in parallel, and is installed in an energy storage capacitor box (108). The total capacity of the energy storage capacitor (4) is equal to the total capacity of the parallel aluminum electrolytic capacitors.

5. The magnetic latching mechanism electric control assembly for a gas insulated circuit breaker cabinet according to claim 1, characterized in that The magnetic holding mechanism controller (7) internally comprises a microcomputer system, a power supply circuit, a charging circuit, a drive circuit, an input interface, an output interface, a wired communication interface and a wireless communication interface; after being connected to an external DC24V~DC48V DC power supply or AC85V~AC265V AC power supply, a DC high-voltage energy storage capacitor (4) charging power supply and a DC low-voltage magnetic holding mechanism controller (7) internal circuit working power supply are generated through the power supply circuit; the input interface receives the closing state and opening state switch signals of the closing operation button (9), the opening operation button (10) and the auxiliary switch (6); the output interface outputs the switch signal of the energy storage indicator (8); the wireless communication interface and the wired communication interface are used for remote data exchange and remote opening and closing operations; after the wireless communication interface is wirelessly connected to a smart phone, data exchange and opening and closing operations are performed through the smart phone; the charging circuit controls the energy storage charging process of the energy storage capacitor (4); the drive circuit controls the excitation coil in the magnetic holding operating mechanism (3) to connect the energy storage capacitor (4) in the forward or reverse direction to discharge.

6. The magnetic latching mechanism electric control assembly for a gas insulated circuit breaker cabinet according to claim 1, characterized in that The two signal lines of the tripping control output of the microcomputer protection device are respectively connected in series to the terminal block (11), two groups of normally open contacts in the auxiliary switch (6), and two resistors, and then connected to the two ends of the excitation coil of the magnetic holding operating mechanism (3) in the opening direction, so as to directly control the magnetic holding operating mechanism (3) to produce an opening operation.

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