CN105206467B - A kind of anti-error disconnection disconnecting switch for 110kv power grid - Google Patents

A kind of anti-error disconnection disconnecting switch for 110kv power grid Download PDF

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Publication number
CN105206467B
CN105206467B CN201510674470.0A CN201510674470A CN105206467B CN 105206467 B CN105206467 B CN 105206467B CN 201510674470 A CN201510674470 A CN 201510674470A CN 105206467 B CN105206467 B CN 105206467B
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moving knife
lock
switch
knife
electromagnetic
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CN105206467A (en
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夏烬楚
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Chongzuo Pingxiang Power Supply Bureau of Guangxi Power Grid Co Ltd
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夏烬楚
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02Details
    • H01H31/04Interlocking mechanisms

Abstract

The invention discloses a kind of anti-error disconnection disconnecting switch for 110kv power grid, moving knife electromagnetic mechanism, including current sensor, electromagnetic lock, and moving knife latch mechanism, current sensor is set 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 moving knife column upper end, coil in current sensor secondary side and electromagnetic 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 is connected to the portion of moving knife bar, moving knife latch mechanism is used to lock the disconnection movement of moving knife bar.The circuit length and complexity of lock cell can be reduced, it avoids circuit too long and causes error signal or reduce the influence of the safety of requirement or lock cell of the circuit complexity to connection, electromagnetic mechanism is set rapidly to act simultaneously, the accuracy for improving electromagnetic lock mechanism, avoids false release or lock out action caused by error signal.

Description

A kind of anti-error disconnection disconnecting switch for 110kv power grid
Technical field
The present invention relates to a kind of anti-error disconnection disconnecting switch for 110kv power grid.
Background technique
Anti-error disconnection disconnecting switch for 110kv power grid is switch electricity important in power plant and substation's electrical system Device need to be matched with high-voltage circuitbreaker, and major function is: guarantee the safety of High-Voltage Electrical Appliances and device in service work, Play isolation voltage, cannot with cut off, put into load current and cut-off short circuit current, can only be used to not generate powerful electricity Certain handover operations of arc, i other words it does not have arc-suppression function;It is divided by infield difference, formula outside formula and room, is pressed within doors Insulation column number is divided into, open side type, and queen post and three pillar type, each voltage class have optional equipment.For 110kv power grid Anti-error disconnection disconnecting switch ensure that the safety of High-Voltage Electrical Appliances and device in service work, play isolation voltage, cannot With with cut off, put into load current and cut-off short circuit current, can only be used to the certain handover operations for not generating powerful electric arc, be Say that it does not have arc-suppression function;It is divided by infield difference, formula outside formula and room, is divided into, single-column by insulation column number within doors Formula, queen post and three pillar type, each voltage class have optional equipment.Can also by the part for needing to have a power failure in high voltage distribution installation with Live part is reliably isolated, to guarantee the safety of service work.The contact of anti-error disconnection disconnecting switch for 110kv power grid All open to have apparent cut-off point in air, disconnecting switch does not have arc-control device, therefore cannot be used to cut off load electricity Stream or short circuit current, 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 make At arcing, scaling loss equipment jeopardizes personal safety, and here it is the major accidents of so-called " on-load drawing disconnecting switch ".For 110kv The anti-error disconnection disconnecting switch of power grid 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 circuit, can with for 110kv power grid anti-error disconnection disconnecting switch by running circuit from one Bus is switched on another bus.
Present disconnecting switch is frequently used in each substation, the movement of disconnecting switch be usually by console into Row far distance control, the anti-error disconnection disconnecting switch for 110kv power grid is unable to on-load and acts this feature, existing " five is anti-" Although some safeguards have been done in measure, due to the reasons such as maloperation or controller error signal, most probably cause to be isolated The earthing knife-switch malfunction in disconnecting switch is switched or be mounted on, serious danger is caused, endangers power grid security.
Summary of the invention
It is an object of the invention to: in view of the above problems, provide a kind of anti-error disconnection for 110kv power grid every Pass is left, locking device is set in disconnecting switch, when avoiding because of console far distance control, error signal is generated, uses The safety of equipment is influenced in the anti-error disconnection disconnecting switch malfunction of 110kv power grid, personnel misoperation, controller is avoided to miss Influence of the signal to disconnecting switch safety, improves the safety of power grid, avoids and keeps apart for the anti-error disconnection of 110kv power grid Influence of the malfunction to personal safety is closed, the electric current which directly generates the induction of coil utilizes, without in addition Power supply, avoids influence of the power supply system to the locking device normal use.
The technical solution adopted by the invention is as follows:
The invention discloses a kind of anti-error disconnection 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 be arranged in moving knife machine For locking movable cutter mechanism on structure, earthing knife-switch electromagnetic mechanism is arranged on quiet cutter mechanism for locking ground cutter mechanism, and moving knife locks gear Structure is connected on the ground cutter mechanism of the disconnecting switch of three-phase, and earthing knife-switch lock linkage mechanism is connected on the ipsilateral ground of disconnecting switch of three-phase On cutter mechanism, closing self-locking mechanism is set between the movable cutter mechanism and quiet cutter mechanism of disconnecting switch;Moving knife electromagnetic mechanism, including electricity Flow sensor, electromagnetic lock one, moving knife latch mechanism, current sensor are set in for incuding the electric current on moving knife bar on moving knife bar, It is provided with insulating layer on current sensor, electromagnetic lock is set to moving knife column upper end, in current sensor secondary side and electromagnetic lock Coil be connected to closed circuit, the upper end of the lock tongue connection moving knife latch mechanism of electromagnetic lock, the lower end connection of the moving knife latch mechanism To the lower part of moving knife bar, moving knife latch mechanism is used to lock the disconnection movement of moving knife bar.
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, earthing knife-switch electromagnetic mechanism, including voltage sensor, electromagnetic lock two, 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;
Further, moving knife locks linkage mechanism, and the moving knife latch mechanism of three disconnecting switch arranged side by side is passed through moving knife connecting rod Connection, enables its moving knife latch mechanism to lock or unlock simultaneously;Earthing knife-switch locks linkage mechanism, by the ground of three disconnecting switch arranged side by side Knife latch mechanism 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 from Locking bar, self-fastening button, self-lock rod both ends are respectively provided with a self-fastening button, and the self-fastening button of one end is set to moving knife column lower part, the other end from Lock is set at ground cutter shaft, the self-locking mechanism for locking ground cutter mechanism or movable cutter mechanism, make ground cutter mechanism and movable cutter mechanism without Method is closed at.
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;
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, comprising:
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 bar is horizontally installed on the top of moving knife column, connects in the lower part of moving knife column Moving knife motor is connect, moving knife motor rotation drives the rotation of moving knife column, and moving knife motor rotation speed and the revolving speed ratio of moving knife column are 300-350, the rotational angle of moving knife column are 0-95 degree;Current sensor is set on moving knife bar, in electric current when moving knife bar charges Induced current in sensor is not less than 30A, insulating layer is provided on current sensor, insulating layer is to include as inner layer Linen-cotton layer with a thickness of 3-4mm, the plastic layer with a thickness of 5-8mm as middle layer, the thickness as outer layer are greater than the ceramics of 1cm Layer, the coil that electromagnetic lock is arranged in moving knife column upper end, current sensor secondary side and electromagnetic lock are connected to closed circuit, incude Electric current acts electromagnetic lock, and the pulling force or thrust of 50N-70N are generated on the lock tongue of electromagnetic lock, is enclosed in the outside of electromagnetic lock Ceramic 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 moving knife bar lower part, moves Knife latch mechanism is used to lock the disconnection movement of moving knife bar;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, 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 apart from moving knife The distance of column is 2-2.2m, and 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 revolving speed and ground knife bar is 310-330, and the length of ground knife bar is 2m -2.2m, and the insulation of black is cased on ground knife bar Rubber layer, 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 Coil in the secondary side and electromagnetic lock of device is connected to closed circuit, voltage sensor be able to detect the voltage of Jing Daotouchu and The induced current of 50A-60A, the coil band after which enters electromagnetic lock, in electromagnetic lock are generated in its second siding ring Electricity generates electromagnetic force on the iron core of electromagnetic lock, and electromagnetic force pulls or push the lock tongue movement of electromagnetic lock, and lock tongue connects earthing knife-switch lock machine The upper end of structure, 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, the earthing knife-switch lock machine The resistance of structure 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, self-fastening button;The moving knife of the disconnecting switch of three-phase It is connected between latch mechanism with moving knife connecting rod, moving knife connecting rod forms three or more triangle mechanisms with moving knife lock, the triangle 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 to keep apart The moving knife column of pass 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, and earthing knife-switch connecting rod passes through flat key and ground cutter shaft It is fixed;It is horizontally arranged with self-lock rod on the switch frame of disconnecting switch, is respectively flexibly connected a self-fastening button at the both ends of self-lock rod, The self-fastening button of one end is set to moving knife column lower part and is used to for moving knife column being fixed to switch frame, and the self-fastening button of the other end is set to earthing knife-switch It for locking ground cutter shaft movement at axis, 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 moving knife lock cell:
(1), when disconnecting switch works normally, current sensor senses electric current on moving knife bar, at this point, in current sensor Secondary coil in generate the induced current of 30A-40A, induced current acts on electromagnetic lock through conducting wire;In electromagnetic lock, in electricity Flow electric current on induction coil band;
(2), the induced current of 30A-40A charges the coil in electromagnetic lock, the magnetic strength that the iron core that coil is wound generates Answering intensity is 500T-600T;Lock tongue movement locking makes the moving knife unit be unable to complete disconnection movement;
(3), behind iron core band magnetic field, the lock tongue of electromagnetic lock is pulled or pushed under magneticaction, by 50N-70N on lock tongue Pulling force or thrust;
(4), lock tongue pulls or moving knife latch mechanism is pushed to rise or fall, and the distance of movement is greater than 3cm, movable cutter mechanism Moving knife column is locked on switch frame and is locked as closed state by lower end;
(5), after the electric current in disconnecting switch is disconnected, the induced current on current sensor disappears, non-inductive electric current Into in electromagnetic lock, electromagnetic lock power-off, for the lock tongue of electromagnetic lock under the elastic force effect of its spring 20-30N, lock tongue resets to unlock Position, while lock tongue pushes or pull on the movement of moving knife latch mechanism and unlocks to moving knife column.
Due to the above method, the circuit length and complexity of lock cell can be reduced, avoids circuit too long and causes mistake The influence of the safety of the requirement or lock cell of error signal or reduction circuit complexity to connection, route is above moving knife column It is converted to actuating mechanism, when electric current being avoided to transmit downwards, causes the danger that Keep Clear-High Voltage or is grounded because insulating properties is bad, together When so that electromagnetic mechanism is rapidly acted, improve the accuracy of electromagnetic lock mechanism, avoid mistake caused by error signal Unlock or lock out action.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
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 anti-error disconnection disconnecting switch structure chart that 110kv power grid is used in the present invention;
Marked in the 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 anti-error disconnection disconnecting switch for 110kv power grid, including 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 linkage Mechanism 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 It is arranged in movable cutter mechanism 4 for locking movable cutter mechanism 4, earthing knife-switch electromagnetic mechanism 23 is arranged on quiet cutter mechanism 3 for locking earthing knife-switch Mechanism 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 On the ipsilateral ground cutter mechanism 2 of the disconnecting switch of phase, closing self-locking mechanism is set to the movable cutter mechanism 4 and quiet cutter mechanism 3 of disconnecting switch 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 one, 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 is provided on current sensor 43, electromagnetic lock one is set It is placed 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, electromagnetic lock one Lock tongue connects the upper end of moving knife latch mechanism, and the lower end of the moving knife latch mechanism is connected to the portion of moving knife bar 41, and moving knife latch mechanism is used for Lock the disconnection movement of moving knife bar 41;
Earthing knife-switch electromagnetic mechanism 23, including voltage sensor 32, electromagnetic lock two, earthing knife-switch latch mechanism, voltage sensor 32 and electricity Magnetic padlock is respectively positioned at quiet cutter head 33, and the secondary side and the coil in electromagnetic lock two of voltage sensor 32 are connected to closed circuit, electricity The lock tongue of magnetic padlock two 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 ground The closed action of knife;
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 At ground cutter shaft, 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, comprising:
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 apart from moving knife column 42 of quiet tool post 31 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 moving knife lock cell:
(1), when disconnecting switch works normally, current sensor 43 senses electric current on moving knife bar 41, at this point, passing in electric current The induced current of 30A-40A is generated in the secondary coil of sensor 43, induced current acts on electromagnetic lock through conducting wire;Electromagnetic lock In, the electric current on electric current induction coil band;
(2), the induced current of 30A-40A charges the coil in electromagnetic lock, the magnetic strength that the iron core that coil is wound generates Answering intensity is 500T-600T;Lock tongue movement is set to be unable to complete disconnection movement to lock the moving knife unit;
(3), behind iron core band magnetic field, the lock tongue of electromagnetic lock is pulled or pushed under magneticaction, by 50N-70N on lock tongue Pulling force or thrust;
(4), lock tongue pulls or moving knife latch mechanism is pushed to rise or fall, and the distance of movement is greater than 3cm, movable cutter mechanism 4 Lower end moving knife column 42 is locked on switch frame 1 and is locked as closed state;
(5), after the electric current in disconnecting switch is disconnected, the induced current on current sensor 43 disappears, influence electricity Stream enters in electromagnetic lock, electromagnetic lock power-off, and for the lock tongue of electromagnetic lock under the elastic force effect of its spring 20-30N, lock tongue resets to solution Lock position, while lock tongue pushes or pull on the movement of moving knife latch mechanism and unlocks to moving knife column 42.
Due to the above method, the circuit length and complexity of lock cell can be reduced, avoids circuit too long and causes mistake The influence of the safety of the requirement or lock cell of error signal or reduction circuit complexity to connection, route is on moving knife column 42 Side is converted to actuating mechanism, when electric current being avoided to transmit downwards, causes the danger that Keep Clear-High Voltage or is grounded because insulating properties is bad, So that electromagnetic mechanism is rapidly acted simultaneously, improves the accuracy of electromagnetic lock mechanism, avoid mistake caused by error signal Misread lock or lock out action.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1. the locking device structure of the disconnecting switch is simple, easy for installation, low in cost, it is easy to reequip;In addition this to set Meter, can by the movable cutter mechanism 4 of disconnecting switch, cutter mechanism 2 realize safety locking, avoid belt current disconnect earthing knife-switch, electrification close The case where closing earthing knife-switch occurs.The simultaneously safety interlock of cutter mechanism 2 and movable cutter mechanism 4 guarantees that the two can not be closed at.
2. the locking device has filled up the defect of existing disconnecting switch design, the security performance of disconnecting switch is enhanced;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, 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.
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 (2)

1. a kind of anti-error disconnection disconnecting switch for 110kv power grid, which is characterized in that 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, 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 electromagnetic mechanism, including current sense Device, electromagnetic lock one, moving knife latch mechanism, current sensor are set in for incuding the electric current on moving knife bar on moving knife bar, in electric current Covers disposed on sensor is equipped with insulating layer, and electromagnetic lock one is set to moving knife column upper end, in current sensor secondary side and electromagnetic lock one Coil is connected to closed circuit, the upper end of the lock tongue connection moving knife latch mechanism of electromagnetic lock one, the lower end connection of the moving knife latch mechanism To the lower part of moving knife bar, moving knife latch mechanism is used to lock the disconnection movement of moving knife bar;Earthing knife-switch electromagnetic mechanism, including voltage sensor Device, electromagnetic lock two, earthing knife-switch latch mechanism, voltage sensor and electromagnetic lock two are respectively positioned on Jing Daotouchu, the secondary side of voltage sensor It is connected to closed circuit with the coil in electromagnetic lock two, the lock tongue of electromagnetic lock two is connected with earthing knife-switch latch mechanism upper end, earthing knife-switch lock machine The lower end connection ground cutter shaft of structure, for the closed action of earthing knife-switch will to be locked;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, in moving knife column Lower part connect moving knife motor;Quiet cutter mechanism, including quiet tool post and quiet cutter head, quiet tool post are vertically arranged to the end of 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;Moving knife locks linkage mechanism, will be arranged side by side The moving knife latch mechanisms of three disconnecting switch connected by moving knife connecting rod, so that its moving knife latch mechanism is locked or unlocked simultaneously; 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, makes its earthing knife-switch lock machine Structure can lock or unlock simultaneously;Closing self-locking mechanism, including self-lock rod, self-fastening button, self-lock rod both ends be respectively provided with one it is self-locking Button, the self-fastening button of one end are set to moving knife column lower part, and the self-fastening button of the other end is set at ground cutter shaft, and the self-locking mechanism is for locking ground Cutter mechanism or movable cutter mechanism be closed at ground cutter mechanism and movable cutter mechanism can not.
2. the anti-error disconnection disconnecting switch according to claim 1 for 110kv power grid, which is characterized in that including moving knife Lock cell, moving knife lock cell include 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 one, moving knife latch mechanism;Moving knife bar is horizontally installed on the top of moving knife column, connects in the lower part of moving knife column Moving knife motor is connect, moving knife motor rotation drives the rotation of moving knife column, and moving knife motor rotation speed and the revolving speed ratio of moving knife column are 300-350, the rotational angle of moving knife column are 0-95 degree;Current sensor is set on moving knife bar, in electric current when moving knife bar charges Induced current in sensor is not less than 30A, insulating layer is provided on current sensor, insulating layer is to include as inner layer Linen-cotton layer with a thickness of 3-4mm, the plastic layer with a thickness of 5-8mm as middle layer, the thickness as outer layer are greater than the ceramics of 1cm Layer, the coil that electromagnetic lock one is arranged in moving knife column upper end, current sensor secondary side and electromagnetic lock one are connected to closed circuit, Induced current acts electromagnetic lock one, the pulling force or thrust of 50N-70N is generated on the lock tongue of electromagnetic lock one, in electromagnetic lock one Outside is enclosed with ceramic layer, and the upper end of the lock tongue connection moving knife latch mechanism of electromagnetic lock one, 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 movement of moving knife bar;The resistance value that moving knife locks upper and lower ends is greater than 1500M Ω And the distance of its upper and lower ends is greater than 1.8m;
The control method of the moving knife lock cell:
(1), when disconnecting switch works normally, current sensor senses electric current on moving knife bar, at this point, the two of current sensor The induced current of 30A-40A is generated in secondary coil, induced current acts on electromagnetic lock one through conducting wire;In electromagnetic lock one, in electricity Flow electric current on induction coil band;
(2), the induced current of 30A-40A charges the coil in electromagnetic lock one, the magnetic induction that the iron core that coil is wound generates Intensity is 500T-600T;Lock tongue movement locking makes the moving knife unit be unable to complete disconnection movement;
(3), behind iron core band magnetic field, the lock tongue of electromagnetic lock, the drawing on lock tongue by 50N-70N are pulled or pushed under magneticaction Power or thrust;
(4), lock tongue pulls or moving knife latch mechanism is pushed to rise or fall, and the distance of movement is greater than 3cm, the lower end of movable cutter mechanism Moving knife column is locked on switch frame and is locked as closed state;
(5), after the electric current in disconnecting switch is disconnected, the induced current on current sensor disappears, and influence electricity stream enters In electromagnetic lock one, electromagnetic lock one is powered off, and for the lock tongue of electromagnetic lock one under the elastic force effect of its spring 20-30N, lock tongue resets to solution Lock position, while lock tongue pushes or pull on the movement of moving knife latch mechanism and unlocks to moving knife column.
CN201510674470.0A 2015-10-19 2015-10-19 A kind of anti-error disconnection disconnecting switch for 110kv power grid Active CN105206467B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2857500B1 (en) * 2003-07-10 2005-10-21 D Electricite Sielec Soc Ind Device for maneuvering a high voltage or medium voltage disconnect, equipped with a device for telecondamating its maneuver
CN1783382A (en) * 1999-09-10 2006-06-07 Abb公司 Method and device for interlocking
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
CN205211650U (en) * 2015-10-19 2016-05-04 夏烬楚 A prevent missing and break off isolator for 110kV electric wire netting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1783382A (en) * 1999-09-10 2006-06-07 Abb公司 Method and device for interlocking
FR2857500B1 (en) * 2003-07-10 2005-10-21 D Electricite Sielec Soc Ind Device for maneuvering a high voltage or medium voltage disconnect, equipped with a device for telecondamating its maneuver
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
CN205211650U (en) * 2015-10-19 2016-05-04 夏烬楚 A prevent missing and break off isolator for 110kV electric wire netting

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Effective date of registration: 20191223

Address after: Room 408, floor 4, building 1, electronic industrial park, Gaoke Road, high tech Zone, Nanning

Patentee after: Nanning public InterSpace Technology Ltd

Address before: 610000 Chengdu City, Wuhou District province Longmen Lane No. 1, building 2, unit 12, No., No. 6

Patentee before: Xia Jinchu

Effective date of registration: 20191223

Address after: 532699 No.137 Pingshan Road, Pingxiang City, Chongzuo City, Guangxi Zhuang Autonomous Region

Patentee after: Guangxi Power Grid Co., Ltd. Chongzuo Pingxiang Power Supply Bureau

Address before: Room 408, floor 4, building 1, electronic industrial park, Gaoke Road, high tech Zone, Nanning

Patentee before: Nanning public InterSpace Technology Ltd