CN105225880B - A kind of anti-error disconnecting switch for 110kV power grids - Google Patents
A kind of anti-error disconnecting switch for 110kV power grids Download PDFInfo
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- CN105225880B CN105225880B CN201510674159.6A CN201510674159A CN105225880B CN 105225880 B CN105225880 B CN 105225880B CN 201510674159 A CN201510674159 A CN 201510674159A CN 105225880 B CN105225880 B CN 105225880B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- 230000006698 induction Effects 0.000 description 9
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- 239000000919 ceramic Substances 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/04—Interlocking mechanisms
- H01H31/08—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
- H01H2300/024—Avoid unwanted operation
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Abstract
A kind of anti-error disconnecting switch for 110kv power grids, including switch frame, movable cutter mechanism, quiet cutter mechanism, ground cutter mechanism, moving knife electromagnetic mechanism, earthing knife-switch electromagnetic mechanism, moving knife locks linkage mechanism, earthing knife-switch locks linkage mechanism, and closing self-locking mechanism, movable cutter mechanism, quiet cutter mechanism, ground cutter mechanism is located on switch frame, moving knife electromagnetic mechanism is arranged in movable cutter mechanism for locking movable cutter mechanism, earthing knife-switch electromagnetic mechanism is arranged on quiet cutter mechanism for locking ground cutter mechanism, on the ground cutter mechanism for the disconnecting switch that moving knife lock linkage mechanism is connected on three-phase, on the ground cutter mechanism for the disconnecting switch homonymy that earthing knife-switch lock linkage mechanism is connected on three-phase, closing self-locking mechanism is set between the movable cutter mechanism and quiet cutter mechanism of disconnecting switch.The influence of personnel's maloperation, controller error signal to disconnecting switch safety is avoided, the safety of power grid is improved, avoids influence of the anti-error disconnecting switch malfunction for 110kv power grids to personal safety.
Description
Technical field
The present invention relates to a kind of anti-error disconnecting switch for 110kV power grids.
Background technology
Anti-error disconnecting switch for 110kV power grids is device for switching important in power plant and substation's electrical system,
It need to be matched with high-voltage circuitbreaker, major function is：Ensure safety in service work of High-Voltage Electrical Appliances and device, rise every
The effect of ionization voltage, cannot with cut off, put into load current and cut-off short circuit current, can only be used to not generate powerful electric arc
Certain handover operations, i other words it does not have arc-suppression function；It is divided by infield difference, within doors formula outside formula and room, by insulation
Pillar number is divided into, open side type, and queen post and three pillar type, each voltage class have optional equipment.For the anti-error of 110kV power grids
Disconnecting switch ensure that the safety of High-Voltage Electrical Appliances and device in service work, play isolation voltage, cannot with cut-out,
It puts into load current and cut-offs short circuit current, the certain handover operations for not generating powerful electric arc are can only be used to, i other words it does not have
There is arc-suppression function；It is divided by infield difference, formula outside formula and room, is divided into, open side type, queen post by insulation column number within doors
And three pillar type, each voltage class have optional equipment.The part having a power failure and live part can will be also needed in high voltage distribution installation
Reliably it is isolated, to ensure the safety of service work.The contact of anti-error disconnecting switch for 110kV power grids is all open in sky
In gas, there is apparent cut-off point, disconnecting switch not to have arc-control device, therefore cannot be used for cutting off load current or short circuit electricity
Stream, otherwise under high pressure effect, cut-off point will generate strong electric arc, and be difficult self-extinguish, in some instances it may even be possible to cause arcing, scaling loss
Equipment jeopardizes personal safety, and here it is the major accidents of so-called " on-load drawing disconnecting switch ".For the anti-error of 110kV power grids
Disconnecting switch can also be used to carry out the handover operation of certain circuits, to change the method for operation of system.Such as：In double-bus electricity
Running circuit can be switched to another mother by Lu Zhong with the anti-error disconnecting switch for 110kV power grids from a busbar
On line.
Present disconnecting switch is frequently used in each substation, the action of disconnecting switch be usually by console into
Row far distance controlled, the anti-error disconnecting switch for 110kV power grids are unable to on-load and act this feature, existing " five is anti-" measure
Although having done some safeguards, due to the reasons such as maloperation or controller error signal, disconnecting switch is most probably caused
Or the earthing knife-switch malfunction in disconnecting switch, serious danger is caused, power grid security is endangered.
Invention content
It is an object of the invention to：In view of the above problems, it provides and a kind of keeps apart for the anti-error of 110kV power grids
It closes, locking device is set in disconnecting switch, when avoiding because of console far distance controlled, generate error signal, be used in
The anti-error disconnecting switch malfunction of 110kV power grids influences the safety of equipment, avoids personnel's maloperation, controller error signal pair
The influence of disconnecting switch safety, improves the safety of power grid, avoids the anti-error disconnecting switch malfunction for 110kV power grids
Influence to personal safety, the electric current which directly generates the induction of coil utilize, and without in addition power supply, avoid
Influence of the power supply system to the locking device normal use.
The technical solution adopted by the present invention is as follows：
The invention discloses a kind of anti-error disconnecting switch for 110kV power grids, including switch frame, movable cutter mechanism, quiet knife
Mechanism, cutter mechanism, moving knife electromagnetic mechanism, earthing knife-switch electromagnetic mechanism, moving knife lock linkage mechanism, earthing knife-switch lock linkage mechanism and switch
Self-locking mechanism, movable cutter mechanism, quiet cutter mechanism, cutter mechanism be located on switch frame, moving knife electromagnetic mechanism be arranged in movable cutter mechanism
For locking movable cutter mechanism, earthing knife-switch electromagnetic mechanism is arranged on quiet cutter mechanism for locking ground cutter mechanism, and moving knife locks linkage mechanism string
It is associated on the ground cutter mechanism of the disconnecting switch of three-phase, earthing knife-switch lock linkage mechanism is connected on the earthing knife-switch machine of the disconnecting switch homonymy of three-phase
On structure, closing self-locking mechanism is set between the movable cutter mechanism and quiet cutter mechanism of disconnecting switch.
Further, movable cutter mechanism, including moving knife motor, moving knife column, moving knife bar；The setting of moving knife column vertical movable is switching
In the middle part of frame or end, moving knife bar are horizontally installed on the top of moving knife column, and moving knife motor is connected in the lower part of moving knife column；Quiet knife machine
Structure, including quiet tool post and quiet cutter head, quiet tool post are vertically arranged to the end of switch frame, and quiet cutter head is located at the top of quiet tool post；It is quiet
Moving knife interface and earthing knife-switch interface are provided on cutter head.
Further, ground cutter mechanism, including ground knife bar, cutter shaft, earthing knife-switch motor, ground knife bar is by earthing knife-switch axis connection to opening
It closes on frame, ground knife bar can turn to vertical direction by horizontal direction around ground cutter shaft and be connect with earthing knife-switch interface, and earthing knife-switch motor is set to
For rotationally knife bar at ground cutter shaft；
Further, moving knife electromagnetic mechanism, including current sensor, the second electromagnetic lock and moving knife latch mechanism, current sense
Device is set on moving knife bar for incuding the electric current on moving knife bar, and insulating layer, the second electromagnetic lock are provided on current sensor
It is set to moving knife column upper end, the second coil in current sensor secondary side and the second electromagnetic lock is connected to closed circuit, and second
The upper end of the second lock tongue connection moving knife latch mechanism of electromagnetic lock, the lower end of the moving knife latch mechanism is connected to the lower part of moving knife bar, moves
Knife latch mechanism is used to lock the disconnection action of moving knife bar；
Further, earthing knife-switch electromagnetic mechanism includes voltage sensor, the first electromagnetic lock and earthing knife-switch latch mechanism, voltage sensor
Device and the first electromagnetic lock are respectively positioned on Jing Daotouchu, and the secondary side of voltage sensor is connected to the first coil in the first electromagnetic lock
First lock tongue of closed circuit, the first electromagnetic lock is connected with earthing knife-switch latch mechanism upper end, and the lower end of earthing knife-switch latch mechanism is connected to earthing knife-switch
Closed action at axis for locking earthing knife-switch；The moving knife locks linkage mechanism, by the moving knife lock machine of three disconnecting switch arranged side by side
Structure is connected by moving knife connecting rod, its moving knife latch mechanism is enable to lock or unlock simultaneously；Earthing knife-switch locks linkage mechanism, by arranged side by side three
The earthing knife-switch latch mechanism of a disconnecting switch is connected by earthing knife-switch connecting rod, its earthing knife-switch latch mechanism is enable to lock or unlock simultaneously；Switch
Self-locking mechanism, including self-lock rod, self-fastening button, self-lock rod both ends are respectively provided with a self-fastening button, and second self-fastening button of one end, which is set to, to be moved
First self-fastening button of tool post lower part, the other end is set at ground cutter shaft, which is used to lock ground cutter mechanism or movable cutter mechanism,
Make ground cutter mechanism and movable cutter mechanism that can not be closed at.
Due to above structure, the safety that can effectively improve disconnecting switch ensure that by the way of mechanical latching
The safety of isolating-switch locking can effectively reduce the possibility of disconnecting switch maloperation, can keep away locking isolating switch
Exempt from maloperation and caused by the person or property loss, be disconnecting switch when preventing failure or error signal because of control circuit from occurring
Action, the case where avoiding that power grid is caused to be grounded.
Further, the locking system of disconnecting switch, including：
Moving knife lock cell, including the moving knife column of 10kW-15kW moving knife motor, 2m-2.2m long, 4m-4.5m long moving knife bar,
Current sensor, the second electromagnetic lock and moving knife latch mechanism；Moving knife column vertical movable is arranged in the middle part of switch frame or end, moving knife
Bar is horizontally installed on the top of moving knife column, connects moving knife motor in the lower part of moving knife column, moving knife motor rotation drives moving knife column
The rotating speed ratio of rotation, moving knife motor rotation speed and moving knife column is 300-350, and the rotational angle of moving knife column is 0-95 degree；Electricity
Flow sensor is set on moving knife bar, and the second induced current when moving knife bar charges in current sensor is not less than 30A, in electricity
Be provided with insulating layer in flow sensor, insulating layer be include as the thickness of inner layer be 3-4mm linen-cotton layer, as the thickness in middle level
Plastic layer of the degree for 5-8mm, the thickness as outer layer are more than the ceramic layer of 1cm, and the setting of the second electromagnetic lock is in moving knife column upper end, electricity
The second coil in flow sensor secondary side and the second electromagnetic lock is connected to closed circuit, and the second induced current makes the second electromagnetic lock
It acts, the pulling force or thrust of 50N-70N is generated on the second lock tongue of the second electromagnetic lock, is enclosed in the outside of the second electromagnetic lock
Ceramic layer, the upper end of the second lock tongue connection moving knife latch mechanism of the second electromagnetic lock, the lower end of the moving knife latch mechanism is connected to moving knife
Bar lower part, moving knife latch mechanism are used to lock the disconnection action of moving knife bar；Moving knife lock upper and lower ends resistance value be more than 1500M Ω and its
The distance of upper and lower ends is more than 1.8m；
Earthing knife-switch lock cell, including ground knife bar, cutter shaft, earthing knife-switch motor, quiet tool post, quiet cutter head, voltage sensor, first
Electromagnetic lock and earthing knife-switch latch mechanism；Ground knife bar is by the way that in earthing knife-switch axis connection to switch frame, ground knife bar can be around ground cutter shaft by horizontal direction
It turns to vertical direction and is connect with the earthing knife-switch interface on quiet cutter head, the height of quiet cutter head is 1.9m-2.1m, the distance of quiet tool post
The distance of moving knife column is 2-2.2m, and the moving knife interface and moving knife bar on quiet cutter head are contour, end and the moving knife interface phase of moving knife bar
Cooperation；The earthing knife-switch motor that power is 30kW-35kW is set at ground cutter shaft and earthing knife-switch motor is for rotationally knife bar, earthing knife-switch electricity
The shaft of machine and the rotating ratio of earthing knife-switch are 310-330, and the length of ground knife bar is 2m -2.2m, and the exhausted of black is cased on ground knife bar
Edge rubber layer, ground knife bar are 0-92 degree around the rotational angle of ground cutter shaft；It is equipped with voltage sensor in quiet tool post upper end, which passes
First coil in the secondary side of sensor and the first electromagnetic lock is connected to closed circuit, and voltage sensor can detect Jing Daotouchu
Voltage and in its second siding ring generate 50A-60A the first induced current, first induced current enter the first electromagnetism
After lock, the first coil electrification in the first electromagnetic lock generates electromagnetic force on the first iron core of the first electromagnetic lock, and electromagnetic force pulls
Or the first lock tongue action of the first electromagnetic lock is pushed, the first lock tongue connects the upper end of earthing knife-switch latch mechanism, the lower end of the earthing knife-switch latch mechanism
The action for locking earthing knife-switch, ground cutter mechanism is locked on switch frame, and the resistance of the earthing knife-switch latch mechanism upper and lower ends is more than 2000M Ω
And the distance of its upper and lower ends is more than 1.8m；
Interlocking unit, including several moving knife connecting rods, earthing knife-switch connecting rod, self-lock rod and self-fastening button；The disconnecting switch of three-phase is moved
It is connected with moving knife connecting rod between knife latch mechanism, moving knife connecting rod forms three or more triangle mechanisms, the triangle with moving knife lock
Each side length of side all be not less than 50cm；The moving knife connecting rod can make moving knife latch mechanism while lock or unlock moving knife column, make isolation
The moving knife column of switch can act simultaneously；It is connected by earthing knife-switch connecting rod between the earthing knife-switch latch mechanism of the disconnecting switch of three-phase, the ground
Knife connecting rod is connected at ground cutter shaft and by the ground cutter shaft series connection of the disconnecting switch homonymy of three-phase, and earthing knife-switch connecting rod passes through flat key and earthing knife-switch
Axis is fixed；It is horizontally arranged with self-lock rod on the switch frame of disconnecting switch, in respectively one self-locking of flexible connection of the both ends of self-lock rod
Button, the second self-fastening button of one end are set to moving knife column lower part and are used to moving knife column being fixed to switch frame, the other end first from
Lock is set at ground cutter shaft for locking ground cutter shaft action, makes the ground cutter mechanism and movable cutter mechanism that can not be closed at.
, can be not only mutual indepedent but also interrelated by each unit modularization of disconnecting switch due to above system, it can
Chain reaction caused by the effective malfunction avoided between unit, enables disconnecting switch effectively to coordinate, to make every
Pass is left good to operate, it is non-interference, and coordinate two-by-two, improve safety and the locking security of device.In addition, each
Rational Parameters used in a unit, had not only met the power grid security regulation of country, but also can reach the disconnecting switch safety of optimization
The characteristics of property.
Further, the control method of the disconnecting switch：
（1）, disconnecting switch normal work when, current sensor senses electric current on moving knife bar, at this point, in current sensor
Secondary coil in generate the second induced current of 30A-40A, the second induced current acts on through conducting wire on the second electromagnetic lock；The
In two electromagnetic locks, the electric current on electric current induction coil band；
（2）, 30A-40A the second induced current so that the second coil in the second electromagnetic lock is charged, the second coil is wound
The second iron core generate magnetic induction intensity be 500T-600T；Make the action of moving knife lock tongue that can not be completed to lock moving knife unit
Disconnection acts；
（3）, the second iron core band magnetic field after, under magneticaction pull or push the second electromagnetic lock the second lock tongue, second
By the pulling force of 50N-70N or thrust on lock tongue；
（4）, the second lock tongue pull or push moving knife latch mechanism rise or fall, movement distance be more than 3cm, moving knife machine
Moving knife column is locked on switch frame and is locked as closed state by the lower end of structure；
（5）, after the electric current in disconnecting switch is disconnected, the second induced current on current sensor disappears, non-inductive
Electric current enters in the second electromagnetic lock, and the power-off of the second electromagnetic lock, the second lock tongue of the second electromagnetic lock is its second spring 20-30N's
Under elastic force effect, the second lock tongue resets to unlocked position, while the second lock tongue pushes or pull on the movement of moving knife latch mechanism and to dynamic
Tool post unlocks；
（6）, the disconnecting switch moving knife bar when being in operating position or open position, voltage sensor senses quiet cutter head
The upper alternating voltage over the ground with more than 10kV forms the first induced current of 10A-20A in the secondary side of voltage sensor；
（7）, the first induced current enter the first electromagnetic lock after, flow through the first coil in the first electromagnetic lock and in First Line
Magnetic field is generated on circle, which is conducted by the first iron core wound by first coil, and the magnetic induction on the first iron core is strong at this time
Degree is 300T-450T；Magnetic force on first iron core pulls on or pushes the first lock tongue of the first electromagnetic lock to act；
（8）, the first lock tongue acted on the earthing knife-switch latch mechanism being connected on the first lock tongue the pulling force or thrust of 30-40N；Ground
Knife latch mechanism moves up or down under the action of pulling force or thrust, and the distance of movement is more than 5cm；
（9）, earthing knife-switch latch mechanism lower end the lower end of the action of moving knife column locking or earthing knife-switch latch mechanism is passed through into gear
Structure makes moving knife column be locked as off-state；
（10）, when the voltage drop on the quiet cutter head of disconnecting switch down to allow close earthing knife-switch voltage value when, voltage sensor
It can not sense that the alternating voltage over the ground on quiet cutter head or the voltage-to-ground on its quiet cutter head meet the requirement for being closed earthing knife-switch, voltage
The secondary side induced current of sensor disappears or reduces, and the magnetic induction intensity of first coil reduces in the first electromagnetic lock, the first iron
The pulling force or thrust of the first lock tongue of core pair reset the elastic force of the first spring less than the first lock tongue, and the size of the elastic force is 15N-20N,
First lock tongue resets under the elastic force effect for resetting the first spring, and the first lock tongue drives the action of earthing knife-switch latch mechanism, earthing knife-switch latch mechanism
Lower end over the ground cutter shaft unlock；
（11）, when the moving knife column of movable cutter mechanism needs rotational action, control by disconnecting switch electric current drop zero, three-phase
Moving knife latch mechanism unlock in disconnecting switch, three moving knife latch mechanisms are moved up or are moved down simultaneously under the action of moving knife connecting rod,
The triangular structure of moving knife connecting rod and moving knife latch mechanism composition can reinforce the degree of stability of its structure, make the disconnecting switch of three-phase
It unlocks or locks simultaneously；
（12）, when the moving knife column of disconnecting switch turns to open position, moving knife column pulls the set on moving knife column lower end
Two self-fastening buttons, the second self-fastening button act on self-lock rod the pulling force or thrust of 50N-80N；The self-lock rod other end is set at ground cutter shaft
First self-fastening button moves under pulling force or thrust, and cutter shaft unlocks over the ground；
（13）, interlocking unit and earthing knife-switch lock cell be over the ground after cutter shaft unlock, when the earthing knife-switch of three-phase isolation switch needs
When closed action, the ground knife bar of three-phase is rotated up simultaneously under the action of earthing knife-switch connecting rod, until on earthing knife-switch upper end and quiet cutter head
Earthing knife-switch interface connection；
（14）, earthing knife-switch close to closed state when, the first self-fastening button of earthing knife-switch lower end, which is acted, to be pulled or is pushed away with the power of 50N-80N
Dynamic self-lock rod, the second self-fastening button positioned at moving knife column lower end acts under the action of the pulling force of self-lock rod or thrust, under moving knife column
Disconnecting switch is locked as off-state by second self-fastening button at end；
（15）, local knife bar is when being located at open position, in disconnecting switch closing course, disconnecting switch drive below the
One self-fastening button acts, and the first self-fastening button makes self-lock rod act with the pulling force or thrust of 50N-80N, first be located at below ground cutter shaft
Earthing knife-switch lever lock is set to off-state by self-fastening button, while earthing knife-switch lock cell detects on quiet cutter head with alternating voltage over the ground, moves
Knife lock cell further locks ground cutter shaft.
The circuit length and complexity of lock cell can be reduced, is kept away due to the above method as a result of the above method
It is long and cause error signal or reduce the influence of the safety of requirement or lock cell of the circuit complexity to connection to exempt from circuit,
Its circuit is converted to actuating mechanism above moving knife column, and when electric current being avoided to transmit downwards, high pressure is caused because insulating properties is bad
Dangerous or ground connection danger, while electromagnetic mechanism being enable rapidly to act, the accuracy of electromagnetic lock mechanism is improved, mistake is avoided
False release caused by error signal or lock out action.It can realize the alternate integrating action of disconnecting switch, while realize isolation
Mechanical latching between the moving knife and earthing knife-switch of switch, security risk caused by effectively preventing moving knife and earthing knife-switch to be closed at, energy
Enough effective alternate safeties for improving disconnecting switch and uniformity, while enhancing the safety of power grid.It can realize and keep apart
The alternate integrating action closed, while realizing the mechanical latching between the moving knife of disconnecting switch and earthing knife-switch, effectively prevent moving knife and
Security risk caused by earthing knife-switch is closed at can effectively improve alternate safety and the uniformity of disconnecting switch, increase simultaneously
The safety of forceful electric power net.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1, the locking device structure of the disconnecting switch is simple, easy for installation, of low cost, is easy to reequip；In addition this to set
Meter, can by the movable cutter mechanism of disconnecting switch, cutter mechanism realize safety locking, avoid belt current disconnect earthing knife-switch, electrification be closed
The case where earthing knife-switch, occurs.The simultaneously safety interlock of cutter mechanism and movable cutter mechanism ensures that the two can not be closed at.
2, the locking device has filled up the defect of existing disconnecting switch design, enhances the security performance of disconnecting switch；Essence
The control circuit of simple blocking device avoids circuit long or crosses security risk caused by auxiliary, using relatively reliable machine
Tool mechanism, effectively avoids control circuit from powering off, the case where causing disconnecting switch that can not protect.
3, the locking device of the disconnecting switch is avoided because of error signal or faulty operation, and caused by equipment, the person,
The generation of the case where power grid accident.
4, the locking device of the disconnecting switch is simple and practicable, can be reequiped on the isolated switchgear with installation,
With good easy generalization.
5, the locking device is simple with circuit structure, and circuit is short, avoids long distance signal transmission to signaling security
It influences.
6, the locking means, exquisite composition can greatly ensure disconnecting switch not because of maloperation or error signal
Influence electric network security.
Description of the drawings
Fig. 1 is the anti-error disconnecting switch structure chart that 110kV power grids are used in the present invention；
It is marked in figure：1- switch frames, the ground 2- cutter mechanism, the ground 21- knife bar, the ground 22- cutter shaft, 23- earthing knife-switch electromagnetic mechanisms, 24-
Earthing knife-switch lock tongue, the quiet cutter mechanisms of 3-, the quiet tool posts of 31-, 32- voltage sensors, the quiet cutter heads of 33-, 4- movable cutter mechanisms, 41- moving knife bars,
42- moving knife columns, 43- current sensors, 44- moving knife electromagnetic mechanisms, 45- moving knife lock tongues, 46- moving knife motors.
Specific implementation mode
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Specific embodiment 1：
As shown in Figure 1,
The invention discloses a kind of anti-error disconnecting switch for 110kV power grids, including it is switch frame 1, movable cutter mechanism 4, quiet
Cutter mechanism 3, cutter mechanism 2, moving knife electromagnetic mechanism 44, earthing knife-switch electromagnetic mechanism 23, moving knife lock linkage mechanism, earthing knife-switch lock gear
Structure and closing self-locking mechanism, movable cutter mechanism 4, quiet cutter mechanism 3, cutter mechanism 2 be located on switch frame 1, moving knife electromagnetic mechanism 44 is set
It sets for locking movable cutter mechanism 4 in movable cutter mechanism 4, earthing knife-switch electromagnetic mechanism 23 is arranged on quiet cutter mechanism 3 for locking earthing knife-switch machine
Structure 2, moving knife are locked on the ground cutter mechanism 2 for the disconnecting switch that linkage mechanism is connected on three-phase, and earthing knife-switch lock linkage mechanism is connected on three-phase
Disconnecting switch homonymy ground cutter mechanism 2 on, closing self-locking mechanism be set to disconnecting switch movable cutter mechanism 4 and quiet cutter mechanism 3 it
Between.
Movable cutter mechanism 4, including moving knife motor 46, moving knife column 42, moving knife bar 41；The setting of 42 vertical movable of moving knife column is switching
1 middle part of frame or end, moving knife bar 41 are horizontally installed on the top of moving knife column 42, and moving knife motor is connected in the lower part of moving knife column 42
46；Quiet cutter mechanism 3, including quiet tool post 31 and quiet cutter head 33, quiet tool post 31 are vertically arranged to the end of switch frame 1, quiet cutter head 33
Positioned at the top of quiet tool post 31；Moving knife interface and earthing knife-switch interface are provided on quiet cutter head 33.
Ground cutter mechanism 2, including ground knife bar 21, cutter shaft 22, earthing knife-switch motor, ground knife bar 21 be connected to out by ground cutter shaft 22
It closes on frame 1, ground knife bar 21 can turn to vertical direction by horizontal direction around ground cutter shaft 22 and be connect with earthing knife-switch interface, earthing knife-switch motor
For rotationally knife bar 21 at ground cutter shaft 22；
Moving knife electromagnetic mechanism 44, including current sensor 43, the second electromagnetic lock and moving knife latch mechanism, current sensor 43
It is set on moving knife bar 41 for incuding the electric current on moving knife bar 41, insulating layer, the second electricity is provided on current sensor 43
Magnetic padlock is set to 42 upper end of moving knife column, and the second coil in 43 secondary side of current sensor and the second electromagnetic lock, which is connected to, to be closed back
Road, the upper end of the second lock tongue connection moving knife latch mechanism of the second electromagnetic lock, the lower end of the moving knife latch mechanism is connected to moving knife bar 41
Lower part, moving knife latch mechanism be used for lock moving knife bar 41 disconnection action；
Earthing knife-switch electromagnetic mechanism 23, including voltage sensor 32, the first electromagnetic lock and earthing knife-switch latch mechanism, voltage sensor 32
It is respectively positioned at quiet cutter head 33 with the first electromagnetic lock, the secondary side of voltage sensor 32 is connected to the coil in the first electromagnetic lock and closes
Circuit is closed, the first lock tongue of the first electromagnetic lock is connected with earthing knife-switch latch mechanism upper end, and the lower end of earthing knife-switch latch mechanism is connected to ground cutter shaft
Closed action at 22 for locking earthing knife-switch；
Moving knife locks linkage mechanism, and the moving knife latch mechanism of three disconnecting switch arranged side by side is connected by moving knife connecting rod, makes it
Moving knife latch mechanism can lock or unlock simultaneously；Earthing knife-switch locks linkage mechanism, by the earthing knife-switch latch mechanism of three disconnecting switch arranged side by side
It is connected by earthing knife-switch connecting rod, its earthing knife-switch latch mechanism is enable to lock or unlock simultaneously；Closing self-locking mechanism, including self-lock rod, from
Lock, self-lock rod both ends are respectively provided with a self-fastening button, and second self-fastening button of one end is set to 42 lower part of moving knife column, and the first of the other end
Self-fastening button is set at ground cutter shaft, which makes ground cutter mechanism 2 and moving knife machine for locking ground cutter mechanism 2 or movable cutter mechanism 4
Structure 4 can not be closed at.
Due to above structure, the safety that can effectively improve disconnecting switch ensure that by the way of mechanical latching
The safety of isolating-switch locking can effectively reduce the possibility of disconnecting switch maloperation, can keep away locking isolating switch
Exempt from maloperation and caused by the person or property loss, be disconnecting switch when preventing failure or error signal because of control circuit from occurring
Action, the case where avoiding that power grid is caused to be grounded.
Specific embodiment 2：
Based on the locking system for implementing 1 disconnecting switch, including：
Moving knife lock cell, including the moving knife column 42 of 10kW-15kW moving knife motor 46,2m-2.2m long, 4m-4.5m long are dynamic
Knife bar 41, current sensor 43, the second electromagnetic lock and moving knife latch mechanism；The setting of 42 vertical movable of moving knife column is at 1 middle part of switch frame
Or end, moving knife bar 41 are horizontally installed on the top of moving knife column 42, connection moving knife motor 46, the moving knife in the lower part of moving knife column 42
The rotation of motor 46 drives moving knife column 42 to rotate, and the rotating speed ratio of 46 velocity of rotation of moving knife motor and moving knife column 42 is 300-350, is moved
The rotational angle of tool post 42 is 0-95 degree；Current sensor 43 is set on moving knife bar 41, is passed in electric current when moving knife bar 41 charges
The second induced current in sensor 43 is not less than 30A, is provided with insulating layer on current sensor 43, insulating layer be include conduct
Linen-cotton layer that the thickness of inner layer is 3-4mm, as middle level thickness be 5-8mm plastic layer, as the thickness of outer layer be more than 1cm
Ceramic layer, the second electromagnetic lock be arranged in 42 upper end of moving knife column, 43 secondary side of current sensor and the second electromagnetic lock second
Coil is connected to closed circuit, and the second induced current makes the second electromagnetic lock act, and is generated on the second lock tongue of the second electromagnetic lock
The pulling force or thrust of 50N-70N is enclosed with ceramic layer in the outside of the second electromagnetic lock, and the second lock tongue connection of the second electromagnetic lock is dynamic
The lower end of the upper end of knife latch mechanism, the moving knife latch mechanism is connected to 41 lower part of moving knife bar, and moving knife latch mechanism is for locking moving knife bar
41 disconnection action；The resistance value that moving knife locks upper and lower ends is more than 1500M Ω and the distance of its upper and lower ends is more than 1.8m；
Earthing knife-switch lock cell, including ground knife bar 21, cutter shaft 22, earthing knife-switch motor, quiet tool post 31, quiet cutter head 33, voltage pass
Sensor 32, the first electromagnetic lock and earthing knife-switch latch mechanism；Ground knife bar 21 is connected to by ground cutter shaft 22 on switch frame 1, and ground knife bar 21 can
Vertical direction is turned to by horizontal direction around ground cutter shaft 22 and is connect with the earthing knife-switch interface on quiet cutter head 33, the height of quiet cutter head 33
The distance apart from moving knife column 42 for 1.9m-2.1m, quiet tool post 31 is 2-2.2m, the moving knife interface on quiet cutter head 33 and moving knife bar
41 is contour, and the end of moving knife bar 41 is matched with moving knife interface；The earthing knife-switch motor that power is 30kW-35kW is set at ground cutter shaft 22
And for earthing knife-switch motor for rotationally knife bar 21, the shaft of the earthing knife-switch motor and the rotating ratio of earthing knife-switch are 310-330, ground knife bar 21
Length be 2m -2.2m, the electro-insulating rubber layer of black, angle of rotation of the ground knife bar 21 around ground cutter shaft 22 are cased on ground knife bar 21
Degree is 0-92 degree；It is equipped with voltage sensor 32, the secondary side of the voltage sensor 32 and the first electromagnetic lock in 31 upper end of quiet tool post
Interior first coil is connected to closed circuit, and voltage sensor 32 can detect the voltage at quiet cutter head 33 and in its secondary side line
The first induced current that 50A-60A is generated in circle, after the first induced current enters the first electromagnetic lock, first in the first electromagnetic lock
Coil charges, and electromagnetic force is generated on the first iron core of the first electromagnetic lock, and electromagnetic force pulls or push the first of the first electromagnetic lock
Lock tongue acts, and the first lock tongue connects the upper end of earthing knife-switch latch mechanism, the action of the lower end locking earthing knife-switch of the earthing knife-switch latch mechanism, by earthing knife-switch machine
Structure is locked on switch frame, and the resistance of earthing knife-switch latch mechanism upper and lower ends is more than 2000M Ω and the distance of its upper and lower ends is more than
1.8m；
Interlocking unit, including several moving knife connecting rods, earthing knife-switch connecting rod, self-lock rod and self-fastening button；The disconnecting switch of three-phase is moved
It is connected with moving knife connecting rod between knife latch mechanism, moving knife connecting rod forms three or more triangle mechanisms, the triangle with moving knife lock
Each side length of side all be not less than 50cm；The moving knife connecting rod can make moving knife latch mechanism while lock or unlock moving knife column 42, make every
Leaving the moving knife column 42 of pass can act simultaneously；It is connected by earthing knife-switch connecting rod between the earthing knife-switch latch mechanism of the disconnecting switch of three-phase,
The earthing knife-switch connecting rod is connected at ground cutter shaft 22 and the ground cutter shaft 22 of the disconnecting switch homonymy of three-phase is connected, and earthing knife-switch connecting rod passes through flat
Key is fixed with ground cutter shaft 22；It is horizontally arranged with self-lock rod on the switch frame 1 of disconnecting switch, each activity connects at the both ends of self-lock rod
A self-fastening button is connect, the second self-fastening button of one end is set to 42 lower part of moving knife column and is used to moving knife column 42 being fixed to switch frame 1,
First self-fastening button of the other end is set at ground cutter shaft 22 and is acted for locking ground cutter shaft 22, makes ground cutter mechanism 2 and 4 nothing of movable cutter mechanism
Method is closed at.
, can be not only mutual indepedent but also interrelated by each unit modularization of disconnecting switch due to above system, it can
Chain reaction caused by the effective malfunction avoided between unit, enables disconnecting switch effectively to coordinate, to make every
Pass is left good to operate, it is non-interference, and coordinate two-by-two, improve safety and the locking security of device.In addition, each
Rational Parameters used in a unit, had not only met the power grid security regulation of country, but also can reach the disconnecting switch safety of optimization
The characteristics of property.
Specific embodiment 3：
Based on the locking system of 2 disconnecting switch of embodiment, the control method of disconnecting switch：
（1）, disconnecting switch normal work when, current sensor 43 senses electric current on moving knife bar 41, at this point, electric current pass
The second induced current of 30A-40A is generated in the secondary coil of sensor 43, the second induced current is acted on through conducting wire on electromagnetic lock；
In second electromagnetic lock, the electric current on electric current induction coil band；
（2）, 30A-40A the second induced current so that the second coil in the second electromagnetic lock is charged, the second coil is wound
The second iron core generate magnetic induction intensity be 500T-600T；Make the action of moving knife lock tongue that can not be completed to lock moving knife unit
Disconnection acts；
（3）, the second iron core band magnetic field after, under magneticaction pull or push the second electromagnetic lock the second lock tongue, second
By the pulling force of 50N-70N or thrust on lock tongue；
（4）, the second lock tongue pull or push moving knife latch mechanism rise or fall, movement distance be more than 3cm, moving knife machine
Moving knife column 42 is locked on switch frame 1 and is locked as closed state by the lower end of structure 4；
（5）, after the electric current in disconnecting switch is disconnected, the second induced current on current sensor 43 disappears, noninductive
Induced current enters in the second electromagnetic lock, and the power-off of the second electromagnetic lock, the second lock tongue of the second electromagnetic lock is in its second spring 20-30N
Elastic force effect under, the second lock tongue resets to unlocked position, while to push or pull on moving knife latch mechanism mobile and right for the second lock tongue
Moving knife column 42 unlocks.
（6）, the disconnecting switch moving knife bar 41 when being in operating position or open position, voltage sensor 32 senses quiet
With the alternating voltage over the ground more than 10kV on cutter head 33, the first sense of 10A-20A is formed in the secondary side of voltage sensor 32
Induced current；
（7）, the first induced current enter the first electromagnetic lock after, flow through the first coil in the first electromagnetic lock and in First Line
Magnetic field is generated on circle, which is conducted by the first iron core wound by first coil, and the magnetic induction on the first iron core is strong at this time
Degree is 300T-450T；Magnetic force on first iron core pulls on or pushes the first lock tongue of the first electromagnetic lock to act；
（8）, the first lock tongue acted on the earthing knife-switch latch mechanism being connected on the first lock tongue the pulling force or thrust of 30-40N；Ground
Knife latch mechanism moves up or down under the action of pulling force or thrust, and the distance of movement is more than 5cm；
（9）, earthing knife-switch latch mechanism lower end the lower end of the action of moving knife column 42 locking or earthing knife-switch latch mechanism is passed through into linkage
Mechanism makes moving knife column 42 be locked as off-state；
（10）, when the voltage drop on the quiet cutter head 33 of disconnecting switch down to allow close earthing knife-switch voltage value when, voltage sensor
Device 32 can not sense that the voltage-to-ground on alternating voltage over the ground or its quiet cutter head 33 on quiet cutter head 33 meets and be closed earthing knife-switch
It is required that the secondary side induced current of voltage sensor 32 disappears or reduces, the magnetic induction intensity of first coil in the first electromagnetic lock
Reduce, the pulling force or thrust of first the first lock tongue of iron core pair reset the elastic force of the first spring less than the first lock tongue, the elastic force it is big
Small is 15N-20N, and the first lock tongue resets under the elastic force effect for resetting the first spring, and the first lock tongue drives earthing knife-switch latch mechanism dynamic
Make, cutter shaft 22 unlocks over the ground for the lower end of earthing knife-switch latch mechanism.
（11）, when the moving knife column 42 of movable cutter mechanism 4 needs rotational action, control by disconnecting switch electric current drop zero,
On three-phase isolation switch moving knife latch mechanism unlock, three moving knife latch mechanisms under the action of moving knife connecting rod simultaneously move up or under
Move, the triangular structure of moving knife connecting rod and moving knife latch mechanism composition can reinforce the degree of stability of its structure, make three-phase every
It leaves pass while unlocking or locking；
（12）, when the moving knife column 42 of disconnecting switch turns to open position, moving knife column 42 pull be set to moving knife column 42 under
Second self-fastening button at end, the second self-fastening button act on self-lock rod the pulling force or thrust of 50N-80N；The self-lock rod other end is set to earthing knife-switch
The first self-fastening button at axis moves under pulling force or thrust, and cutter shaft 22 unlocks over the ground；
（13）, interlocking unit and earthing knife-switch lock cell be after cutter shaft 22 unlocks over the ground, when the earthing knife-switch of three-phase isolation switch needs
When wanting closed action, the ground knife bar 21 of three-phase is rotated up simultaneously under the action of earthing knife-switch connecting rod, until earthing knife-switch upper end and quiet knife
Earthing knife-switch interface connection on first 33；
（14）, earthing knife-switch close to closed state when, the first self-fastening button of earthing knife-switch lower end, which is acted, to be pulled or is pushed away with the power of 50N-80N
Dynamic self-lock rod, the second self-fastening button positioned at 42 lower end of moving knife column act under the action of the pulling force of self-lock rod or thrust, moving knife column
Disconnecting switch is locked as off-state by the second self-fastening button of 42 lower ends；
（15）, local knife bar 21 is when being located at open position, in disconnecting switch closing course, disconnecting switch drive is below
First self-fastening button acts, and the first self-fastening button makes self-lock rod act with the pulling force or thrust of 50N-80N, is located at 22 lower section of ground cutter shaft
Ground knife bar 21 is locked as off-state by the first self-fastening button, while earthing knife-switch lock cell is detected to carry on quiet cutter head 33 and be handed over over the ground
Galvanic electricity pressure, moving knife lock cell further lock ground cutter shaft 22.
The circuit length and complexity of lock cell can be reduced, is kept away due to the above method as a result of the above method
It is long and cause error signal or reduce the influence of the safety of requirement or lock cell of the circuit complexity to connection to exempt from circuit,
Its circuit is converted to actuating mechanism above moving knife column 42, and when electric current being avoided to transmit downwards, height is caused because insulating properties is bad
Pressure danger or the danger of ground connection, while electromagnetic mechanism being enable rapidly to act, the accuracy of electromagnetic lock mechanism is improved, is avoided
False release caused by error signal or lock out action.Can realize the alternate integrating action of disconnecting switch, at the same realize every
The mechanical latching between the moving knife of pass and earthing knife-switch is left, security risk caused by effectively preventing moving knife and earthing knife-switch to be closed at,
Alternate safety and the uniformity of disconnecting switch can be effectively improved, while enhancing the safety of power grid.It can realize isolation
The alternate integrating action of switch, while realizing the mechanical latching between the moving knife of disconnecting switch and earthing knife-switch, effectively prevent moving knife
Security risk caused by being closed at earthing knife-switch can effectively improve alternate safety and the uniformity of disconnecting switch, simultaneously
Enhance the safety of power grid.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (2)
1. a kind of anti-error disconnecting switch for 110kV power grids, which is characterized in that including switch frame, movable cutter mechanism, quiet knife machine
Structure, cutter mechanism, moving knife electromagnetic mechanism, earthing knife-switch electromagnetic mechanism, moving knife lock linkage mechanism, earthing knife-switch lock linkage mechanism and switch from
Latch mechanism, movable cutter mechanism, quiet cutter mechanism, cutter mechanism be located on switch frame, moving knife electromagnetic mechanism setting is used in movable cutter mechanism
In locking movable cutter mechanism, earthing knife-switch electromagnetic mechanism is arranged on quiet cutter mechanism for locking ground cutter mechanism, and moving knife locks linkage mechanism series connection
On the ground cutter mechanism of the disconnecting switch of three-phase, earthing knife-switch lock linkage mechanism is connected on the ground cutter mechanism of the disconnecting switch homonymy of three-phase
On, closing self-locking mechanism is set between the movable cutter mechanism and quiet cutter mechanism of disconnecting switch；Earthing knife-switch electromagnetic mechanism includes voltage sensor
Device, the first electromagnetic lock and earthing knife-switch latch mechanism, voltage sensor and the first electromagnetic lock are respectively positioned on Jing Daotouchu, voltage sensor
First coil in secondary side and the first electromagnetic lock is connected to closed circuit, the first lock tongue and the earthing knife-switch latch mechanism of the first electromagnetic lock
Upper end is connected, and the lower end of earthing knife-switch latch mechanism is connected to the closed action at ground cutter shaft for locking earthing knife-switch；The moving knife lock linkage
The moving knife latch mechanism of three disconnecting switch arranged side by side is connected by moving knife connecting rod, enables its moving knife latch mechanism simultaneously by mechanism
It locks or unlocks；Earthing knife-switch locks linkage mechanism, and the earthing knife-switch latch mechanism of three disconnecting switch arranged side by side is connected by earthing knife-switch connecting rod, is made
Its earthing knife-switch latch mechanism can lock or unlock simultaneously；Closing self-locking mechanism, including self-lock rod, self-fastening button, self-lock rod both ends are respectively set
There are one self-fastening button, second self-fastening button of one end is set to moving knife column lower part, and the first self-fastening button of the other end is set at ground cutter shaft, should
Self-locking mechanism makes ground cutter mechanism and movable cutter mechanism that can not be closed at for locking ground cutter mechanism or movable cutter mechanism；Ground cutter mechanism,
Including ground knife bar, cutter shaft, earthing knife-switch motor, ground knife bar by earthing knife-switch axis connection to switch frame, ground knife bar can around ground cutter shaft by
Horizontal direction turns to vertical direction and is connect with earthing knife-switch interface, and earthing knife-switch motor is set at ground cutter shaft for rotationally knife bar.
2. the anti-error disconnecting switch according to claim 1 for 110kV power grids, which is characterized in that the moving knife electricity
Magnetic mechanism, including current sensor, the second electromagnetic lock and moving knife latch mechanism, current sensor are set on moving knife bar for feeling
The electric current on moving knife bar is answered, insulating layer is provided on current sensor, the second electromagnetic lock is set to moving knife column upper end, and electric current passes
The second coil in sensor secondary side and the second electromagnetic lock is connected to closed circuit, and the second lock tongue of the second electromagnetic lock connects moving knife
The upper end of latch mechanism, the lower end of the moving knife latch mechanism are connected to the lower part of moving knife bar, and moving knife latch mechanism is for locking moving knife bar
Disconnection acts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510674159.6A CN105225880B (en) | 2015-10-19 | 2015-10-19 | A kind of anti-error disconnecting switch for 110kV power grids |
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| CN201510674159.6A CN105225880B (en) | 2015-10-19 | 2015-10-19 | A kind of anti-error disconnecting switch for 110kV power grids |
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| CN105225880B true CN105225880B (en) | 2018-11-06 |
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| CN204029694U (en) * | 2014-07-22 | 2014-12-17 | 浙江上美输配电有限公司 | High-voltage switch cabinet grounding switch interlock |
| CN205194600U (en) * | 2015-10-19 | 2016-04-27 | 夏烬楚 | A prevent mistake isolator for 110kV electric wire netting |
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| CN201570424U (en) * | 2009-12-09 | 2010-09-01 | 武汉钢铁(集团)公司 | Switch interlocking device of high-voltage isolating switch |
| EP2339603A2 (en) * | 2009-12-23 | 2011-06-29 | LS Industrial Systems Co., Ltd | Interlock apparatus of ground switch for vacuum circuit breaker |
| CN103354191A (en) * | 2013-07-02 | 2013-10-16 | 保定鼎阳电力科技发展有限公司 | Device capable of preventing on-load operation of high-voltage isolating switch |
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