CN105161347B - A kind of interlocking disconnecting switch for 110kv power grid - Google Patents
A kind of interlocking disconnecting switch for 110kv power grid Download PDFInfo
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- CN105161347B CN105161347B CN201510672394.XA CN201510672394A CN105161347B CN 105161347 B CN105161347 B CN 105161347B CN 201510672394 A CN201510672394 A CN 201510672394A CN 105161347 B CN105161347 B CN 105161347B
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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
- H01H31/04—Interlocking mechanisms
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Abstract
A kind of interlocking disconnecting switch for 110kv power grid, including switch frame, movable cutter mechanism, quiet cutter mechanism, cutter mechanism, moving knife electromagnetic mechanism, earthing knife-switch electromagnetic mechanism, moving knife lock linkage mechanism, earthing knife-switch lock linkage mechanism and closing self-locking mechanism, movable cutter mechanism, quiet cutter mechanism, cutter mechanism be 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, the locking device structure of the disconnecting switch is simple, easy for installation, low in cost, is easy to reequip；In addition this design, can by the movable cutter mechanism of disconnecting switch, cutter mechanism realize safety locking, avoid belt current disconnect earthing knife-switch, electrification closure earthing knife-switch the case where generation.The simultaneously safety interlock of cutter mechanism and movable cutter mechanism guarantees that the two can not be closed at.
Description
Technical field
The present invention relates to a kind of interlocking disconnecting switch for 110kv power grid.
Background technique
Interlocking disconnecting switch for 110kv power grid 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：Guarantee 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.Interlocking for 110kv power grid
Disconnecting switch ensure that the safety of High-Voltage Electrical Appliances and device in service work, play isolation voltage, cannot with cutting,
It puts into load current and cut-offs short circuit current, can only be used to the certain handover operations for not generating powerful electric arc, 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.It can also be by the part for needing to have a power failure in high voltage distribution installation and live part
Reliably it is isolated, to guarantee the safety of service work.The contact of interlocking disconnecting switch for 110kv power grid is all open in sky
In gas, there is apparent cut-off point, disconnecting switch does not have arc-control device, therefore cannot be used to cut 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 ".Interlocking for 110kv power grid
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 from a bus with the interlocking disconnecting switch for 110kv power grid by Lu Zhong
On line.
Present disconnecting switch is frequently used in each substation, the movement of disconnecting switch be usually by console into
Row far distance control, the interlocking disconnecting switch for 110kv power grid 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 it is mounted on the earthing knife-switch malfunction in disconnecting switch, serious danger is caused, power grid security is endangered.
Summary of the invention
It is an object of the invention to：In view of the above problems, a kind of interlocking for 110kv power grid is provided to keep apart
It closes, locking device is set in disconnecting switch, when avoiding because of console far distance control, generate error signal, be used in
The interlocking disconnecting switch malfunction of 110kv power grid influences the safety of equipment, avoids personnel misoperation, controller error signal pair
The influence of disconnecting switch safety, improves the safety of power grid, avoids the interlocking disconnecting switch malfunction for 110kv power grid
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 interlocking disconnecting switch for 110kv power grid, 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 ipsilateral earthing knife-switch machine of disconnecting switch of three-phase
On structure, closing self-locking mechanism is set between the movable cutter mechanism and quiet cutter mechanism of disconnecting switch；Moving knife locks linkage mechanism, will be arranged side by side
The moving knife latch mechanism of three disconnecting switch is connected by moving knife connecting rod, its moving knife latch mechanism is enable to lock or unlock simultaneously；Ground
Knife 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, makes its earthing knife-switch latch mechanism
It can lock or unlock simultaneously；Closing self-locking mechanism, including self-lock rod, self-fastening button, self-lock rod both ends are respectively provided with a self-fastening button,
The self-fastening button of one end is set to moving knife column lower part, and the self-fastening button of the other end is set to earthing knife-switch buckle, and the self-locking mechanism is for locking earthing knife-switch
Mechanism or movable cutter mechanism be closed at ground cutter mechanism and movable cutter mechanism can not.
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, connect moving knife motor 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 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, electromagnetic lock and moving knife latch mechanism, current sensor set
It is located on moving knife bar for incuding the electric current on moving knife bar, insulating layer is provided on current sensor, electromagnetic lock is set to dynamic
Coil in tool post upper end, current sensor secondary side and electromagnetic lock is connected to closed circuit, and the lock tongue of 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 movement；
Further, earthing knife-switch electromagnetic mechanism, including voltage sensor, electromagnetic lock and earthing knife-switch latch mechanism, voltage sensor and
Electromagnetic lock is respectively positioned on Jing Daotouchu, and the coil in the secondary side and electromagnetic lock of voltage sensor is connected to closed circuit, electromagnetic lock
Lock tongue be connected with earthing knife-switch latch mechanism upper end, the lower end of earthing knife-switch latch mechanism is connected at ground cutter shaft for that will lock the closure of earthing knife-switch
Movement；
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, preventing failure or error signal because of control circuit is disconnecting switch when occurring
Movement, avoids the case where power grid is grounded.
Further, the locking system of disconnecting switch, including：
Moving knife lock cell, including 10kW-15kW moving knife motor, the moving knife column of 2m-2.2m long, 4m-4.5m long moving knife bar,
Current sensor, electromagnetic lock and moving knife latch mechanism；Moving knife column is movably connected on switch frame, and moving knife bar is horizontally installed on moving knife
The top of column connects moving knife motor in the lower part of moving knife column, and moving knife motor rotation drives the rotation of moving knife column, the rotation of moving knife motor
The revolving speed ratio of speed and moving knife column is 300-350, and the rotational angle of moving knife column is 0-95 degree；Current sensor is set in moving knife
On bar, induced current when moving knife bar charges in current sensor is not less than 30A, and insulation is provided on current sensor
Layer, insulating layer be include as inner layer with a thickness of 3-4mm linen-cotton layer, as middle layer with a thickness of 5-8mm plastic layer, make
It is greater than the ceramic layer of 1cm for the thickness of outer layer, electromagnetic lock is arranged in moving knife column upper end, current sensor secondary side and electromagnetic lock
Coil be connected to closed circuit, induced current acts electromagnetic lock, on the lock tongue of electromagnetic lock generate 50N-70N pulling force or
Thrust is enclosed with ceramic layer, the upper end of the lock tongue connection moving knife latch mechanism of electromagnetic lock, the moving knife latch mechanism in the outside of electromagnetic lock
Lower end be connected to moving knife bar lower part, moving knife latch mechanism is used to lock the disconnection movement of moving knife bar；The resistance of moving knife lock upper and lower ends
Value is greater than 1500M Ω and the distance of its upper and lower ends is greater 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, electromagnetism
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 rotated around ground cutter shaft by horizontal direction
Connect to vertical direction and with the earthing knife-switch interface on quiet cutter head, the height of quiet cutter head is 1.9m-2.1m, quiet tool post and moving knife column it
Between distance be 2-2.2m, the moving knife interface and moving knife bar on quiet cutter head are contour, and the end of moving knife bar is matched with moving knife interface；
The earthing knife-switch motor that power is 30kW-35kW is set at ground cutter shaft and earthing knife-switch motor is used for rotationally knife bar, the earthing knife-switch motor
The rotating ratio of shaft and earthing knife-switch is 310-330, and the length of ground knife bar is 2m -2.2m, and the insulation rubber of black is cased on ground knife bar
Glue-line, ground knife bar are 0-92 degree around the rotational angle of ground cutter shaft；Voltage sensor, the voltage sensor are equipped in quiet tool post upper end
Secondary side and electromagnetic lock in coil be connected to closed circuit, voltage sensor is able to detect the voltage of Jing Daotouchu and at it
The induced current that 50A-60A is generated in second siding ring, after which enters electromagnetic lock, the coil in electromagnetic lock is charged,
Electromagnetic force is generated on the iron core of electromagnetic lock, electromagnetic force pulls or push the lock tongue movement of electromagnetic lock, and lock tongue connects earthing knife-switch latch mechanism
Upper end, the earthing knife-switch latch mechanism lower end locking earthing knife-switch movement, ground cutter mechanism is locked on switch frame, the earthing knife-switch latch mechanism
The resistance of upper and lower ends is greater than 2000M Ω and the distance of its upper and lower ends is greater 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
Moving knife latch mechanism between connected with moving knife connecting rod, moving knife connecting rod and composition three or more, moving knife lock triangle mechanisms, this three
Angular each side side length is all not less than 50cm；The moving knife connecting rod can make moving knife latch mechanism while lock or unlock moving knife column, make
The moving knife column of disconnecting switch can move at the same time；It is connected between the earthing knife-switch latch mechanism of the disconnecting switch of three-phase by earthing knife-switch connecting rod,
The earthing knife-switch connecting rod is connected at ground cutter shaft and the ipsilateral ground cutter shaft of the disconnecting switch of three-phase is connected, earthing knife-switch connecting rod by flat key with
Ground cutter shaft is fixed；It is horizontally arranged with self-lock rod on the switch frame of disconnecting switch, is respectively flexibly connected one at the both ends of self-lock rod
Self-fastening button, the 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 self-fastening button of the other end
For locking ground cutter shaft movement at ground cutter shaft, this be closed at ground cutter mechanism and movable cutter mechanism can not.
, can be not only mutually indepedent but also interrelated by each unit modularization of disconnecting switch due to above system, it can
Effectively avoid chain reaction caused by malfunction between unit, disconnecting switch enable effectively to cooperate, thus make every
Leaving pass good can operate, non-interference, and cooperate 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 interlocking unit：
（1）, 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；
（2）, when the moving knife column of disconnecting switch turns to open position, moving knife column pull be set to moving knife column lower end it is self-locking
Button, pulling force or thrust of the self-fastening button to self-lock rod effect 50N-80N；The self-lock rod other end be set at ground cutter shaft in pulling force or
Thrust self-fastening button is mobile, and cutter shaft unlocks over the ground；
（3）, interlocking unit and earthing knife-switch lock cell be over the ground after cutter shaft unlock, when the earthing knife-switch needs of three-phase isolation switch close
When conjunction acts, 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
The connection of earthing knife-switch interface；
（4）, earthing knife-switch close to closed state when, the self-fastening button movement of earthing knife-switch lower end pull or push with the power of 50N-80N from
Locking bar, the self-fastening button positioned at moving knife column lower end act under the action of the pulling force of self-lock rod or thrust, moving knife column lower end it is self-locking
Disconnecting switch is locked as off-state by button；
（5）, local knife bar is when being located at open position, in disconnecting switch closing course, disconnecting switch drives below oneself
Lock movement, self-fastening button act self-lock rod with the pulling force or thrust of 50N-80N, the self-fastening button below ground cutter shaft, by ground
Knife bar is locked as off-state, while earthing knife-switch lock cell detects on quiet cutter head with alternating voltage over the ground, moving knife lock cell
Ground cutter shaft is further locked.
Due to above-mentioned method, the alternate integrating action of disconnecting switch can be realized, while realizing the moving knife of disconnecting switch
Mechanical latching between earthing knife-switch, security risk caused by effectively preventing moving knife and earthing knife-switch to be closed at can be mentioned effectively
The alternate safety and uniformity of high isolation switch, while enhancing the safety of power grid.
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, low in 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 closure
The case where earthing knife-switch, occurs.The simultaneously safety interlock of cutter mechanism and movable cutter mechanism guarantees 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 too long or crosses security risk caused by auxiliary, using relatively reliable machine
The case where tool mechanism, effectively avoids control circuit from powering off, and causes 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 easy, can be reequiped on the isolated switchgear with installation,
With good easy generalization.
5, the locking device is simple with circuit structure, and route is short, avoids long distance signal transmission to signaling security
It influences.
6, the locking means, exquisite composition can greatly guarantee disconnecting switch not because of maloperation or error signal
Influence electric network security.
Detailed description of the invention
Fig. 1 is the interlocking disconnecting switch structure chart that 110kv power grid is used in the present invention；
It is marked in figure：1- switch frame, the ground 2- cutter mechanism, the ground 21- knife bar, the ground 22- cutter shaft, 23- earthing knife-switch electromagnetic mechanism, 24-
Earthing knife-switch lock tongue, the quiet cutter mechanism of 3-, the quiet tool post of 31-, 32- voltage sensor, the quiet cutter head of 33-, 4- movable cutter mechanism, 41- moving knife bar,
42- moving knife column, 43- current sensor, 44- moving knife electromagnetic mechanism, 45- moving knife lock tongue, 46- moving knife motor.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention 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 interlocking disconnecting switch for 110kv power grid, 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
The ipsilateral ground cutter mechanism 2 of disconnecting switch 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, connect moving knife motor 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 by ground cutter shaft 22 be connected to out
It closes on frame 1, ground knife bar 21 can turn to vertical direction by horizontal direction around ground cutter shaft 22 and 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, electromagnetic lock and moving knife latch mechanism, current sensor 43 are arranged
For incuding the electric current on moving knife bar 41 on moving knife bar 41, insulating layer, electromagnetic lock setting are provided on current sensor 43
In 42 upper end of moving knife column, the coil in 43 secondary side of current sensor and electromagnetic lock is connected to closed circuit, the lock tongue of electromagnetic lock
The upper end of moving knife latch mechanism is connected, the lower end of the moving knife latch mechanism is connected to the lower part of moving knife bar 41, and moving knife latch mechanism is for locking
Determine the disconnection movement of moving knife bar 41；
Earthing knife-switch electromagnetic mechanism 23, including voltage sensor 32, electromagnetic lock and earthing knife-switch latch mechanism, voltage sensor 32 and electricity
Magnetic padlock is respectively positioned at quiet cutter head 33, and the coil in the secondary side and electromagnetic lock of voltage sensor 32 is connected to closed circuit, electromagnetism
The lock tongue of lock is connected with earthing knife-switch latch mechanism upper end, and the lower end of earthing knife-switch latch mechanism is connected at ground cutter shaft 22 for that will lock earthing knife-switch
Closed action；
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 the self-fastening button of one end is set to 42 lower part of moving knife column, and the self-fastening button of the other end is set
In earthing knife-switch buckle, which makes ground cutter mechanism 2 and movable cutter mechanism 4 can not for locking ground cutter mechanism 2 or movable cutter mechanism 4
It is 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, preventing failure or error signal because of control circuit is disconnecting switch when occurring
Movement, avoids the case where power grid is grounded.
Specific embodiment 2：
Based on the locking system for implementing 1 disconnecting switch, including：
Moving knife lock cell, it is dynamic including 10kW-15kW moving knife motor 46, the moving knife column 42 of 2m-2.2m long, 4m-4.5m long
Knife bar 41, current sensor 43, electromagnetic lock and moving knife latch mechanism；Moving knife column 42 is movably connected on switch frame 1, moving knife bar 41
It is horizontally installed on the top of moving knife column 42, connects moving knife motor 46 in the lower part of moving knife column 42, the moving knife motor 46 rotation drives
Moving knife column 42 rotates, and the revolving speed ratio of 46 velocity of rotation of moving knife motor and moving knife column 42 is 300-350, the angle of rotation of moving knife column 42
Degree is 0-95 degree；Current sensor 43 is set on moving knife bar 41, induction when moving knife bar 41 charges in current sensor 43
Electric current is not less than 30A, insulating layer is provided on current sensor 43, insulating layer is to include as inner layer with a thickness of 3-4mm
Linen-cotton layer, the plastic layer with a thickness of 5-8mm as middle layer, the thickness as outer layer be greater than the ceramic layer of 1cm, electromagnetic lock sets
The coil set in 42 upper end of moving knife column, 43 secondary side of current sensor and electromagnetic lock is connected to closed circuit, and induced current makes
Electromagnetic lock acts, and the pulling force or thrust of 50N-70N are generated on the lock tongue of electromagnetic lock, is enclosed with ceramics in the outside of electromagnetic lock
Layer, the upper end of the lock tongue connection moving knife latch mechanism of electromagnetic lock, the lower end of the moving knife latch mechanism is connected to 41 lower part of moving knife bar, moving knife
Latch mechanism is used to lock the disconnection movement of moving knife bar 41；The resistance value that moving knife locks upper and lower ends is greater than 1500M Ω and its upper and lower ends
Distance be greater 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, electromagnetic lock and earthing knife-switch latch mechanism；Ground knife bar 21 is connected on switch frame 1 by ground cutter shaft 22, and ground knife bar 21 can be around ground
Cutter shaft 22 is turned to vertical direction by horizontal direction and is connect with the earthing knife-switch interface on quiet cutter head 33, and the height of quiet cutter head 33 is
1.9m-2.1m, the distance between quiet tool post 31 and moving knife column 42 are 2-2.2m, moving knife interface and moving knife bar 41 on quiet cutter head 33
Contour, 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 simultaneously
And 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 is 2m -2.2m, and the electro-insulating rubber layer of black, rotational angle of the ground knife bar 21 around ground cutter shaft 22 are cased on ground knife bar 21
For 0-92 degree；It is equipped with voltage sensor 32 in quiet 31 upper end of tool post, the line in the secondary side and electromagnetic lock of the voltage sensor 32
Circle is connected to closed circuit, and voltage sensor 32 is able to detect the voltage at quiet cutter head 33 and generates in its second siding ring
The induced current of 50A-60A, after which enters electromagnetic lock, the coil in electromagnetic lock is charged, on the iron core of electromagnetic lock
Electromagnetic force is generated, electromagnetic force pulls or push the lock tongue movement of electromagnetic lock, and lock tongue connects the upper end of earthing knife-switch latch mechanism, the earthing knife-switch lock machine
The movement of the lower end locking earthing knife-switch of structure, ground cutter mechanism 2 is locked on switch frame 1, the resistance of the earthing knife-switch latch mechanism upper and lower ends
It is greater than 1.8m greater than the distance of 2000M Ω and its upper and lower ends；
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
Moving knife latch mechanism between connected with moving knife connecting rod, moving knife connecting rod and composition three or more, moving knife lock triangle mechanisms, this three
Angular each side side length is all not less than 50cm；The moving knife connecting rod can make moving knife latch mechanism while lock or unlock moving knife column 42,
The moving knife column 42 of disconnecting switch is set to move at the same time；Connected between the earthing knife-switch latch mechanism of the disconnecting switch of three-phase by earthing knife-switch connecting rod
It connects, which is connected at ground cutter shaft 22 and the ipsilateral ground cutter shaft 22 of the disconnecting switch of three-phase is connected, and earthing knife-switch connecting rod is logical
It crosses flat key and ground cutter shaft 22 is fixed；It is horizontally arranged with self-lock rod on the switch frame 1 of disconnecting switch, in each work in the both ends of self-lock rod
One self-fastening button of dynamic connection, the self-fastening button of one end are set to 42 lower part of moving knife column and are used to moving knife column 42 being fixed to switch frame 1,
The self-fastening button of the other end is set at ground cutter shaft 22 and acts for locking ground cutter shaft 22, this makes ground cutter mechanism 2 and movable cutter mechanism 4 can not
It is closed at.
, can be not only mutually indepedent but also interrelated by each unit modularization of disconnecting switch due to above system, it can
Effectively avoid chain reaction caused by malfunction between unit, disconnecting switch enable effectively to cooperate, thus make every
Leaving pass good can operate, non-interference, and cooperate 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 interlocking unit：
（1）, when the moving knife column 42 of movable cutter mechanism 4 needs rotational action, control by disconnecting switch electric current drop zero, three
The moving knife latch mechanism unlock being isolated on 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 its moving knife connecting rod and moving knife latch mechanism composition can reinforce the degree of stability of its structure, make keeping apart for three-phase
It closes while unlocking or locking；
（2）, when the moving knife column 42 of disconnecting switch turns to open position, moving knife column 42 pull be set to 42 lower end of moving knife column
Self-fastening button, self-fastening button to self-lock rod effect 50N-80N pulling force or thrust；The self-lock rod other end is set at ground cutter shaft 22
It is mobile in pulling force or thrust self-fastening button, and cutter shaft 22 unlocks over the ground；
（3）, 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 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 cutter head
Earthing knife-switch interface connection on 33；
（4）, earthing knife-switch close to closed state when, the self-fastening button movement of earthing knife-switch lower end pull or push with the power of 50N-80N from
Locking bar, the 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, 42 lower end of moving knife column
Disconnecting switch is locked as off-state by self-fastening button；
（5）, local knife bar 21 is when being located at open position, in disconnecting switch closing course, disconnecting switch drive is below
Self-fastening button movement, self-fastening button act self-lock rod with the pulling force or thrust of 50N-80N, the self-fastening button positioned at 22 lower section of ground cutter shaft,
Ground knife bar 21 is locked as off-state, while earthing knife-switch lock cell detects on quiet cutter head 33 with alternating voltage over the ground, moving knife
Lock cell further locks ground cutter shaft 22.
Due to above-mentioned method, the alternate integrating action of disconnecting switch can be realized, while realizing the moving knife of disconnecting switch
Mechanical latching between earthing knife-switch, security risk caused by effectively preventing moving knife and earthing knife-switch to be closed at can be mentioned effectively
The alternate safety and uniformity of high isolation switch, while enhancing 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 in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of interlocking disconnecting switch for 110kV power grid, 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 ipsilateral ground cutter mechanism of disconnecting switch of three-phase
On, closing self-locking mechanism is set between the movable cutter mechanism and quiet cutter mechanism of disconnecting switch；Moving knife locks linkage mechanism, by arranged side by side three
The moving knife latch mechanism of a disconnecting switch is connected by moving knife connecting rod, its moving knife latch mechanism is enable to lock or unlock simultaneously；Earthing knife-switch
Linkage mechanism is locked, the earthing knife-switch latch mechanism of three disconnecting switch arranged side by side is connected by earthing knife-switch connecting rod, enables its earthing knife-switch latch mechanism
Enough while locking or unlocking；Closing self-locking mechanism, including self-lock rod, self-fastening button, self-lock rod both ends are respectively provided with a self-fastening button, and one
The self-fastening button at end is set to moving knife column lower part, and the self-fastening button of the other end is set to earthing knife-switch buckle, and the self-locking mechanism is for locking earthing knife-switch machine
Structure or movable cutter mechanism be closed at ground cutter mechanism and movable cutter mechanism can not；Earthing knife-switch electromagnetic mechanism, including voltage sensor, electricity
Magnetic padlock and earthing knife-switch latch mechanism, voltage sensor and electromagnetic lock are respectively positioned on Jing Daotouchu, the secondary side and electromagnetic lock of voltage sensor
Interior coil is connected to closed circuit, and the lock tongue of electromagnetic lock is connected with earthing knife-switch latch mechanism upper end, the lower end connection of earthing knife-switch latch mechanism
To at ground cutter shaft for locking the closed action of earthing knife-switch.
2. the interlocking disconnecting switch according to claim 1 for 110kV power grid, which is characterized in that movable cutter mechanism, including
Moving knife motor, moving knife column, moving knife bar；Moving knife column vertical movable is arranged in the middle part of switch frame or end, moving knife bar are horizontally installed on
The top of moving knife column connects moving knife motor in the lower part of moving knife column；Quiet cutter mechanism, including quiet tool post and quiet cutter head, quiet tool post are perpendicular
To the end for being set to switch frame, quiet cutter head is located at the top of quiet tool post；Moving knife interface and earthing knife-switch interface are provided on quiet cutter head.
3. the interlocking disconnecting switch according to claim 2 for 110kV power grid, which is characterized in that ground cutter mechanism, including
Ground knife bar, cutter shaft, earthing knife-switch motor, 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 level
Direction turns to vertical direction and connect with earthing knife-switch interface, and earthing knife-switch motor is set at ground cutter shaft for rotationally knife bar.
4. the interlocking disconnecting switch according to claim 3 for 110kV power grid, which is characterized in that moving knife electromagnetic mechanism,
Including current sensor, electromagnetic lock and moving knife latch mechanism, current sensor is set on moving knife bar for incuding on moving knife bar
Electric current, is provided with insulating layer on current sensor, and electromagnetic lock is set to moving knife column upper end, current sensor secondary side and electromagnetism
Coil in lock is connected to closed circuit, the upper end of the lock tongue connection moving knife latch mechanism of electromagnetic lock, the lower end of the moving knife latch mechanism
It is connected to the lower part of moving knife bar, moving knife latch mechanism is used to lock the disconnection movement of moving knife bar.
5. the interlocking disconnecting switch according to any one of claims 1 to 4 for 110kV power grid, which is characterized in that isolation
The locking system of switch, including：
Moving knife lock cell, including 10kW-15kW moving knife motor, the moving knife column of 2m-2.2m long, 4m-4.5m long moving knife bar, electric current
Sensor, 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 are laterally set
It sets on the top of moving knife column, connects moving knife motor in the lower part of moving knife column, moving knife motor rotation drives the rotation of moving knife column, moving knife
The revolving speed ratio of motor rotation speed and moving knife column is 300-350, and the rotational angle of moving knife column is 0-95 degree；Current sensor set
It is located on moving knife bar, induced current when moving knife bar charges in current sensor is not less than 30A, is arranged on current sensor
Have an insulating layer, insulating layer be include the linen-cotton layer with a thickness of 3-4mm as inner layer, the modeling with a thickness of 5-8mm as middle layer
The bed of material, the ceramic layer for being greater than 1cm as the thickness of outer layer, electromagnetic lock setting in moving knife column upper end, current sensor secondary side with
Coil in electromagnetic lock is connected to closed circuit, and induced current acts electromagnetic lock, generates 50N-70N on the lock tongue of electromagnetic lock
Pulling force or thrust, be enclosed with ceramic layer in the outside of electromagnetic lock, the upper end of the lock tongue connection moving knife latch mechanism of electromagnetic lock, this is dynamic
The lower end of knife latch mechanism is connected to moving knife bar lower part, and moving knife latch mechanism is used to lock the disconnection movement of moving knife bar；Moving knife is locked down
The resistance value at both ends is greater than 1500M Ω and the distance of its upper and lower ends is greater 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, 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 turned to around ground cutter shaft by horizontal direction
Vertical direction is simultaneously connect with the earthing knife-switch interface on quiet cutter head, and the height of quiet cutter head is 1.9m-2.1m, between quiet tool post and moving knife column
Distance be 2-2.2m, the moving knife interface and moving knife bar on quiet cutter head are contour, and the end of moving knife bar is matched with moving knife interface；Function
The earthing knife-switch motor that rate is 30kW-35kW is set at ground cutter shaft and earthing knife-switch motor is for rotationally knife bar, which turns
Axis and the rotating ratio of earthing knife-switch are 310-330, and the length of ground knife bar is 2m -2.2m, and the electro-insulating rubber of black is cased on ground knife bar
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, the voltage sensor
Coil in secondary side and electromagnetic lock is connected to closed circuit, voltage sensor be able to detect the voltage of Jing Daotouchu and secondly
The induced current that 50A-60A is generated in secondary lateral coil, after which enters electromagnetic lock, the coil in electromagnetic lock is charged,
Electromagnetic force is generated on the iron core of electromagnetic lock, electromagnetic force pulls or push the lock tongue movement of electromagnetic lock, and lock tongue connects earthing knife-switch latch mechanism
Upper end, the movement of the lower end locking earthing knife-switch of the earthing knife-switch latch mechanism, ground cutter mechanism is locked on switch frame, on the earthing knife-switch latch mechanism
The resistance at lower both ends is greater than 2000M Ω and the distance of its upper and lower ends is greater 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 between knife latch mechanism with moving knife connecting rod, moving knife connecting rod forms three or more triangle mechanisms, the triangle with moving knife lock
Each side side length be all not less than 50cm；The moving knife connecting rod can make moving knife latch mechanism while lock or unlock moving knife column, make to be isolated
The moving knife column of switch can move at the same time；It is connected between the earthing knife-switch latch mechanism of the disconnecting switch of three-phase by earthing knife-switch connecting rod, the ground
Knife connecting rod is connected at ground cutter shaft and the ipsilateral ground cutter shaft of the disconnecting switch of three-phase is connected, and earthing knife-switch connecting rod passes through flat key and earthing knife-switch
Axis is fixed；Be horizontally arranged with self-lock rod on the switch frame of disconnecting switch, the both ends of self-lock rod be respectively flexibly connected one it is self-locking
Button, the 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, and the self-fastening button of the other end is set to
It for locking ground cutter shaft movement at ground cutter shaft, be closed at ground cutter mechanism and movable cutter mechanism can not.
6. the interlocking disconnecting switch according to claim 5 for 110kV power grid, which is characterized in that the interlocking unit
Control method：
（1）, when the moving knife column of movable cutter mechanism needs rotational action, control by disconnecting switch electric current drop zero, three are isolated
Moving knife latch mechanism unlock on switch, three moving knife latch mechanisms are moved up or are moved down simultaneously under the action of moving knife connecting rod, moving knife
The triangular structure of connecting rod and moving knife latch mechanism composition can reinforce the degree of stability of its structure, make the disconnecting switch of three-phase simultaneously
Unlock or locking；
（2）, when the moving knife column of disconnecting switch turns to open position, moving knife column pull be set to moving knife column lower end self-fastening button,
Pulling force or thrust of the self-fastening button to self-lock rod effect 50N-80N；The self-lock rod other end be set to ground cutter shaft in pulling force or push away
Power self-fastening button is mobile, and cutter shaft unlocks over the ground；
（3）, 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 need to be closed it is dynamic
When making, the ground knife bar of three-phase is rotated up simultaneously under the action of earthing knife-switch connecting rod, until the earthing knife-switch on earthing knife-switch upper end and quiet cutter head
Interface connection；
（4）, earthing knife-switch close to closed state when, the self-fastening button movement of earthing knife-switch lower end is pulled or is pushed self-lock rod with the power of 50N-80N,
Self-fastening button positioned at moving knife column lower end acts under the action of the pulling force of self-lock rod or thrust, and the self-fastening button of moving knife column lower end will be every
It leaves to shut and is set to off-state；
（5）, local knife bar is when being located at open position, in disconnecting switch closing course, the self-fastening button of disconnecting switch drive below
Movement, self-fastening button act self-lock rod with the pulling force or thrust of 50N-80N, the self-fastening button below ground cutter shaft, by ground knife bar
It is locked as off-state, while earthing knife-switch lock cell detects on quiet cutter head with alternating voltage over the ground, moving knife lock cell is by ground
Cutter shaft further locks.
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| CN201510672394.XA CN105161347B (en) | 2015-10-19 | 2015-10-19 | A kind of interlocking disconnecting switch for 110kv power grid |
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| CN201510672394.XA CN105161347B (en) | 2015-10-19 | 2015-10-19 | A kind of interlocking disconnecting switch for 110kv power grid |
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| CN105161347B true CN105161347B (en) | 2018-11-27 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105489415A (en) * | 2015-12-31 | 2016-04-13 | 国网山东省电力公司青岛供电公司 | Electrified anti-misoperation locking system for busbar grounding isolating switch |
| CN107316762B (en) * | 2017-06-29 | 2019-08-16 | 国网河南省电力公司济源供电公司 | A kind of double-bus disconnecting link earthing knife-switch anti-error locking system |
| CN115332005B (en) * | 2022-09-09 | 2023-09-19 | 江苏东源电器集团股份有限公司 | Double-bus integrated isolating switch with locking structure and use method thereof |
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| US6989498B1 (en) * | 1999-09-10 | 2006-01-24 | Abb Ab | Method and device for locking |
| CN201570424U (en) * | 2009-12-09 | 2010-09-01 | 武汉钢铁(集团)公司 | Switch interlocking device of high-voltage isolating switch |
| 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 |
| CN104319163A (en) * | 2014-11-05 | 2015-01-28 | 湖州电力设备成套有限公司 | Vacuum circuit breaker |
| CN205122464U (en) * | 2015-10-19 | 2016-03-30 | 夏烬楚 | A interlocking isolator for 110kV electric wire netting |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6989498B1 (en) * | 1999-09-10 | 2006-01-24 | Abb Ab | Method and device for locking |
| CN201570424U (en) * | 2009-12-09 | 2010-09-01 | 武汉钢铁(集团)公司 | Switch interlocking device of high-voltage isolating switch |
| 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 |
| CN104319163A (en) * | 2014-11-05 | 2015-01-28 | 湖州电力设备成套有限公司 | Vacuum circuit breaker |
| CN205122464U (en) * | 2015-10-19 | 2016-03-30 | 夏烬楚 | A interlocking isolator for 110kV electric wire netting |
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Effective date of registration: 20181019 Address after: 312030, fourth floor, building 1, north gate of Qixian international logistics center, Keqiao, Shaoxing, Zhejiang. Applicant after: Safe Technology Ltd of Zhejiang Address before: 610000 Sichuan Chengdu Wuhou District Longmen Lane 6 1 Building 2 unit 12 Applicant before: Xia Jinchu |
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