CN106654990A - Live working device and control method thereof - Google Patents
Live working device and control method thereof Download PDFInfo
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- CN106654990A CN106654990A CN201611036436.1A CN201611036436A CN106654990A CN 106654990 A CN106654990 A CN 106654990A CN 201611036436 A CN201611036436 A CN 201611036436A CN 106654990 A CN106654990 A CN 106654990A
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- motor
- lever arm
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
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Abstract
The invention provides a live working device and a control method thereof and belongs to the technical field of power transmission and distribution engineering. The live working device is provided with an insulating rod. A live working tool is installed at the top end of the insulating rod. An operator can carry out live operation through the insulating rod, which can prevent the occurrence of electric shock accidents and help to ensure the personal safety of the operator. A movable support at the top end of the insulating rod is provided with two movable arms extending out of an end opening of the movable support. The live working tool is connected to the extending ends of the two movable arms, and the two movable arms can be extended and retracted to control the opening and closing of cutting-nipper live working devices so as to achieve opening and cutting operations. The extension and retraction of the movable arms are controlled by a stepper motor and a controller. The movable arms are provided with displacement sensors, and the controller determines the rotation direction and the number of rotation steps of the stepper motor according to the positions of the movable arms detected by the displacement sensors so as to control the precise rotation of the stepper motor and to prevent the movable arms from coming out of its mounting position.
Description
Technical field
The present invention relates to power transmission and distribution project technical field, in particular to a kind of livewire work device and its controlling party
Method.
Background technology
In distribution network, electrical equipment needs Jing often to test in longtime running, inspection and maintenance.Livewire work is to avoid
Maintenance has a power failure, it is ensured that the effective measures of normal power supply.Livewire work is not have a power failure overhauled, tested on high voltage electric equipment
A kind of operational method.The content of livewire work can be divided into several aspects such as live testing, on-line checking method and power-on serving.
The danger and labor intensity of livewire work is larger, and often work high above the ground, and artificial livewire work exists certain
Difficult and limitation, therefore, generally require Live working Aerial Device and assist operation.
But in high-voltage hot-line work, livewire work work in part, because geographical environment etc. is limited, causes Live working Aerial Device
Cannot be introduced into, without Live working Aerial Device, operator lack special live line tool, using general purpose tool high voltage,
Livewire work is carried out in high altitude environment, operating condition is severe, there is larger potential safety hazard, easily gets an electric shock, or even causes
Human casualty accident.
The content of the invention
In view of this, the invention provides a kind of livewire work device and its control method, contribute to ensureing operating personnel
Personal safety, and improve work efficiency.
In a first aspect, embodiments providing a kind of livewire work device, described device includes insulating bar and activity
Support；The travel(l)ing rest is connected to the insulating bar upper end；
The travel(l)ing rest is the box body of boring, and two relative ends of the box body are formed with opening；
Lever arm is provided with the travel(l)ing rest, the lever arm is provided with two, and two lever arms are oppositely arranged, point
Stretch out in the opening not formed from two relative ends of travel(l)ing rest；
Sliver is provided with two relative medial walls of the travel(l)ing rest, the sliver sets in the same direction with the lever arm
Put, for making the lever arm that linear slide is kept when extending and retracting；
The external part of the lever arm is provided with the connecting portion for connecting live line tool；Two lever arms exist
Tooth bar is provided with relative side wall；
On the travel(l)ing rest, and gear is provided between two lever arms, the gear and the lever arm
On tooth bar be meshed, for drive two lever arms extend and retract；
The travel(l)ing rest lower end, and control chamber is arranged with outside the insulating bar, it is provided with stepping in the control chamber
Motor and the controller being connected with the motor；The motor shaft of the motor is connected with the gear, band moving gear
Rotate；
Be provided with displacement transducer on a lever arm in two lever arms, institute's displacement sensors be arranged on
The relative other end of the external part of the lever arm, and be connected with the controller；
The control end of the controller is arranged at the insulating bar outside；
The controller is used to receive the instruction of control end transmission, and controls the stepping according to the instruction for receiving
Motor is rotated；
When the instruction that the controller receives control end transmission opens instruction or lever arm close command for lever arm,
The current location that lever arm is located is detected by institute's displacement sensors；
Calculate the distance between current location and default deployed position or make position that lever arm is located, and according to
The distance for arriving determines the rotation direction of motor and rotates step number；
There is enabling signal to the motor, start motor；
According to the rotation direction and rotation step number of the motor for determining, to motor output electric pulse letter
Number, control motor to corresponding rotation direction rotates corresponding step number；
When the motor reaches described rotation step number, occur one to the motor and stop time delay letter
Number, while stopping output electric pulse signal, make step motor stop.
With reference in a first aspect, the embodiment of the present invention additionally provides the first possible embodiment of first aspect, wherein,
The connecting portion includes the bend pipe by made by elastomeric material, and at an acute angle between two linking arms of the bend pipe or right angle connects,
Wherein one linking arm is socketed in the end of the lever arm, and another linking arm is used to be socketed in the end of live line tool
Portion.
With reference in a first aspect, the embodiment of the present invention additionally provides second possible embodiment of first aspect, wherein,
The connecting portion is connected with the end of the lever arm by way of being hinged.
With reference to second possible embodiment of first aspect, the embodiment of the present invention additionally provides the 3rd of first aspect
Possible embodiment is planted, wherein, the connecting portion includes connection main body and the first engaging lug positioned at connection main body bottom；
The cylindrical shape of the connection main body in upper end open, is provided with for connecting livewire work on the inwall for connecting main body
The screw thread of instrument；
Axis hole is formed with first engaging lug, the end of the lever arm is provided with the second engaging lug, the second connection
Connecting shaft is provided with ear, the connecting shaft is rotatably connected in the axis hole on the first engaging lug.
With reference in a first aspect, the embodiment of the present invention additionally provides the 4th kind of possible embodiment of first aspect, wherein,
The controller is additionally operable to for when the instruction that control end sends is received, there is enabling signal to the motor, is started
Motor is rotated according to described instruction to corresponding rotation direction, and detects whether the instruction that control end sends terminates；
When the controller detects the order fulfillment that the control end sends；Occur one to the motor to stop
Stop signal, makes step motor stop.
With reference in a first aspect, the embodiment of the present invention additionally provides the 5th kind of possible embodiment of first aspect, wherein,
Using bonded, holding screw connection or interference fit connection between the motor shaft of the gear and the motor.
With reference in a first aspect, the embodiment of the present invention additionally provides the 6th kind of possible embodiment of first aspect, wherein,
The gear shaft being connected with the gear is additionally provided with the control chamber；The motor shaft of the gear shaft and the motor it
Between by axle sleeve connect.
With reference in a first aspect, the embodiment of the present invention additionally provides the 7th kind of possible embodiment of first aspect, wherein,
Institute's displacement sensors include potentiometric displacement transducer, magnetostrictive displacement sensor, conductive plasticss displacement transducer or
One kind in digital laser displacement transducer.
With reference in a first aspect, the embodiment of the present invention additionally provides the 8th kind of possible embodiment of first aspect, wherein,
The control end of the controller include be arranged on the insulating bar nearly bottom open button and closure button, it is described to open
Button and closure button are connected with the controller, for controlling the folding of lever arm.
Second aspect, the embodiment of the present invention also provides a kind of control method of livewire work device, the livewire work dress
Any of the above-described kind of livewire work device is put, methods described includes：
When the instruction that the controller receives control end transmission opens instruction or lever arm close command for lever arm,
The current location that lever arm is located is detected by institute's displacement sensors；
Calculate the distance between current location and default deployed position or make position that lever arm is located, and according to
The distance for arriving determines the rotation direction of motor and rotates step number；
There is enabling signal to the motor, start motor；
According to the rotation direction and rotation step number of the motor for determining, to motor output electric pulse letter
Number, control motor to corresponding rotation direction rotates corresponding step number；
When the motor reaches described rotation step number, occur one to the motor and stop time delay letter
Number, while stopping output electric pulse signal, make step motor stop.
The embodiment of the present invention brings following beneficial effect：
Livewire work device provided in an embodiment of the present invention, is provided with insulating bar, and live line tool is arranged on insulating bar
Top, operator carry out livewire work, are prevented from the generation of electric shock accidentss by insulating bar, contribute to ensureing operation people
The personal safety of member；
Be provided with two lever arms on the travel(l)ing rest of insulating bar upper end, lever arm from travel(l)ing rest it is open-ended from stretch
Go out, live line tool is connected to the external part of two lever arms, two lever arms can be extended and retracted, so as to control cutting nippers class
Live line tool folding, completes to open and cut off operation；
Extending and retracting for lever arm is controlled by motor and controller, and displacement transducer is provided with lever arm, is controlled
The position of the lever arm that device processed is detected according to displacement transducer determines the rotation direction of motor and rotates step number, and control is walked
Stepper motor fine rotational, prevents lever arm from deviating from from its installation site.
Other features and advantages of the present invention will be illustrated in the following description, also, the partly change from description
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages are in description, claims
And in accompanying drawing specifically noted structure realizing and obtain.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Description of the drawings
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, can be with according to these other accompanying drawings of accompanying drawings acquisition.
The structural representation of the livewire work device that Fig. 1 is provided by one embodiment of the invention；
The internal structure schematic diagram of the livewire work device that Fig. 2 is provided by one embodiment of the invention；
The structural representation of the lever arm that Fig. 3 is provided by one embodiment of the invention；
Fig. 4 is the mplifying structure schematic diagram in A portions in Fig. 3.
Icon：
1- insulating bars；2- travel(l)ing rests；3- control chambers；4- slivers；5- tooth bars；6- lever arms；8- gears；61- bend pipes；
62- connecting portions；621- connects main body；The engaging lugs of 622- first；The engaging lugs of 623- second；624- connecting shafts；625- screw threads.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Technical scheme be clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than
Whole embodiments.The component of the embodiment of the present invention generally herein described and illustrated in accompanying drawing can be matched somebody with somebody with a variety of
Put to arrange and design.Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit
The scope of claimed invention, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention, this
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to the present invention
The scope of protection.
A kind of livewire work device and its control method are embodiments provided, below first to the powered of the present invention
Apparatus for work describes in detail.
Embodiment one
Fig. 1 is the structural representation of the livewire work device that the embodiment is provided；Fig. 2 is the livewire work that this is provided
The internal structure schematic diagram of device.As depicted in figs. 1 and 2, the livewire work device of the embodiment includes insulating bar 1 and activity
Frame 2.
Insulating bar 1 includes the working portion on top, the insulated part at middle part and the holding part of lower end.Working portion is installed
In the upper end of insulated part, for connecting travel(l)ing rest 2；Insulated part is by bakelite, bakelite, plastic tape, expoxy glass stringing etc.
Insulant is made, and acts the effect of being dielectrically separated from；Part is held also by making with insulated part identical material, for convenience of operator
Member's hand-held operation, prevents rubber sleeve, can set up separately in hand grip portion and put concavo-convex.Insulating bar 1 can also be arranged to telescopic expansion link.
Travel(l)ing rest 2 is connected to the upper end of insulating bar 1；Travel(l)ing rest 2 is the box body of boring, and two of box body are relative
End be formed with opening.
Lever arm 6 is provided with travel(l)ing rest 2, lever arm 6 is provided with two, and two lever arms are oppositely arranged, respectively from
Stretch out in the opening that two relative ends of travel(l)ing rest 2 are formed.
Sliver 4 is provided with two relative medial walls of travel(l)ing rest 2, sliver 4 is arranged in the same direction with lever arm 6, is used for
Make lever arm 6 that linear slide is kept when extending and retracting.
The external part of lever arm 6 is provided with the connecting portion for connecting live line tool.
Connecting portion shown in figure is bend pipe 61 by made by elastomeric material, at an acute angle between two linking arms of bend pipe 61
Or right angle connection, wherein linking arm is socketed in the end of lever arm 6, another linking arm is used to be socketed in livewire work work
The end of tool.
Two lever arms 6 are provided with tooth bar 5 on relative side wall.On travel(l)ing rest 2, and two lever arms 6 it
Between be provided with gear 8, gear 8 is meshed with the tooth bar on lever arm 6, for drive two lever arms 6 extend and retract.
The lower end of travel(l)ing rest 2, and control chamber 3 is arranged with outside insulating bar 1, it is provided with motor in control chamber 3 and (does not scheme
Show) and the controller that is connected with motor；The motor shaft of motor is connected with gear, drives pinion rotation.
Motor is the opened loop control element that electric impulse signal is changed into angular displacement or displacement of the lines.In the feelings of non-overload
Under condition, the rotating speed of motor, the position for stopping are solely dependent upon the frequency and umber of pulse of pulse signal, and not by the shadow of load change
Ring.
When step actuator receives a pulse signal, it rotates one admittedly with regard to drive stepping motor by the direction of setting
Fixed angle, referred to as " step angle ", its rotation is run step by step with fixed angle.
Angular displacement can be controlled by controlling pulse number, so as to reach the purpose being accurately positioned；Can lead to simultaneously
Speed and acceleration that control pulse frequency carrys out controlled motor rotation are crossed, so as to reach the purpose of speed governing.
Motor simultaneously can be used by forming control systems such as bicyclic shaped pulse signal, power driving circuits.
Can be using bonded, holding screw connection or interference fit connection between gear 8 and the motor shaft of motor；
Can also be connected with motor shaft using gear shaft, specially be provided with the gear shaft being connected with gear in control chamber 3；
Connected by axle sleeve between gear shaft and the motor shaft of motor.
Displacement transducer (not shown) is provided with a lever arm in two lever arms 6, displacement transducer is arranged on
The other end relative with the external part for stating lever arm, and be connected with controller.
Displacement transducer is a kind of metal sensing linear unit, and the effect of sensor is that measured mechanical displacement is changed
For electricity.Displacement is the relevant amount of movement with the position of object in motor process, the metering system of displacement transducer displacement
Involved scope is quite extensive.
Displacement transducer includes potentiometric displacement transducer, magnetostrictive displacement sensor, conductive plasticss displacement sensing
One kind in device or digital laser displacement transducer.
Mechanical displacement is converted into linear therewith or arbitrary function by potentiometric displacement transducer by potentiometer element
The resistance or voltage output of relation.Generic linear potentiometer and circular potentiometer can all be used separately as straight-line displacement and angular displacement is passed
Sensor.But, to realize the potentiometer that measurement displacement purpose is designed, needs have one between change in displacement and resistance variations
Determine relation.
The displacement of object causes the resistance variations of potentiometer mobile terminal.The variable quantity of resistance reflects the value of displacement, resistance
Increasing for value still reduces the direction for then indicating displacement.Supply voltage is generally passed on potentiometer, so that resistance variations are turned
It is changed to voltage output.Wire wound potentiometer due to when its brush is moved resistance changed as ladder with circle resistance, its output characteristics
Also it is stepped.If this displacement transducer is used as Displacement Feedback element, excessive step voltage meeting in servosystem
Cause system oscillation.Therefore should try one's best in the making of potentiometer and reduce the resistance value of every circle.Advantage is:Simple structure, output
Signal is big, easy to use, cheap.
Magnetostrictive displacement sensor, is to intersect generation one using magnetostriction principle, by two different magnetic fields to answer
Become pulse signal to accurately measure position.Measuring cell is a waveguide, and the sensing element in waveguide is by special
Made by magnetostriction materials.Measurement process is to produce current impulse in electronics room by sensor, and the current impulse is in waveguide
Transmission in pipe, so as to produce a circumferential magnetic field outside waveguide, when the magnetic field and being enclosed within waveguide as change in location
When the magnetic field that movable magnet ring is produced is intersected, due to magnetostrictive effect, a strain machinery wave impulse can be produced in waveguide
Signal, the mechanical wave pulse signal of this strain is transmitted with fixed speed of sound, and quickly detected by electronic room.
Due to having no directly contact as the movable magnet ring and sensing element that determine position, therefore sensor can be applicable to pole
In severe industrial environment, it is difficult to be affected by oil stain, solution, dust or other pollutions, IP degree of protection is in more than IP67.This
Outward, sensor employs hitech materials and advanced electron process technology, thus it can be applied in high temperature, high pressure and high vibration
Environment in.Sensor output signal is absolute displacement values, even if power interruptions, reclosing, data also will not lose, more need not weight
New zero.Because sensing element is non-contacting, even if constantly duplicate detection, also will not cause any abrasion to sensor, can
Greatly to improve the reliability and service life of detection.
Conductive plasticss displacement transducer, is to be overlayed on DAP (dilute third fat of phthalic acid two) resistance slurry with special process
On insulation body, heating aggregates into resistive film, or DAP resistance powder thermoplastics are pressed in the solid formed in the groove of insulating body
As resistive element.Feature is：Flatness is good, definition superior abrasion resistance is good, life-span length, moving noise is little, reliability is high, resistance toization
Learn corrosion.For universe device, guided missile, servosystem of rebecca antenna etc..
Digital laser displacement transducer, can the accurately change such as the position of non-cpntact measurement testee, displacement.According to measurement
Principle, laser displacement sensor principle is divided into laser triangulation and return laser beam analytic process, and laser triangulation is general
Suitable for high accuracy, short-range measurement, and return laser beam analysis rule is used for telemeasurement.
Generating laser will be seen that red laser directive testee surface by camera lens, and the laser of Jing objects reflection passes through
Receptor camera lens, is received by internal CCD linear cameras, and according to different distances, CCD linear cameras can be in different angles
Under " see " this luminous point.According to the distance between this angle and known laser and camera, digital signal processor is with regard to energy
Calculate the distance between sensor and testee.Meanwhile, light beam passes through analogy and digital circuit in the position of receiving element
Process, and by microprocessor analysis, calculate corresponding output valve, and in the analog quantity window of user's setting, in proportion
Outputting standard data signal.If using output switch parameter, turned in the window of setting, end outside window.In addition, mould
Analog quantity can be independently arranged detection window with output switch parameter.
Digital laser displacement transducer adopts echo analysis principle come measurement distance to reach a certain degree of precision.Sensing
It is made up of the part such as processor unit, Echo Processing unit, generating laser, laser pickoff inside device.Laser displacement is passed
By the way that generating laser 1,000,000 laser pulses of transmitting per second are to detectable substance and are back to receptor, processor is calculated and swashed sensor
Light pulse runs into detectable substance and is back to the time needed for receptor, and with this distance value is calculated, and the output valve is by thousands of times
The average output that carries out of measurement result.Return laser beam analytic process is suitable for detection over long distances, but certainty of measurement is relative to laser
Triangulation is low.
The control end of controller is arranged at the outside of insulating bar 1.Controller be used for receive control end transmission instruction, and according to
The instruction for receiving controls the motor and rotates.
The control end of controller include be arranged on the insulating bar nearly bottom open button and closure button, it is described
Open button and closure button is connected with the controller, for controlling the folding of lever arm.
Specifically, when the instruction that controller receives control end transmission opens instruction for lever arm or lever arm closure refers to
When making, the current location that lever arm is located is detected by displacement transducer；
Calculate the distance between current location and default deployed position or make position that lever arm is located, and according to
To distance determine motor rotation direction and rotate step number；
There is enabling signal to motor, start motor；
According to the rotation direction and rotation step number of the motor for determining, to motor output electric pulse signal, control
Motor to corresponding rotation direction rotates corresponding step number；
When motor reaches rotation step number, there is a stopping time delayed signal to motor, while stopping output
Electric impulse signal, makes step motor stop.
The controller is additionally operable to for when the instruction that control end sends is received, occurring to start letter to the motor
Number, start motor and rotated to corresponding rotation direction according to described instruction, and detect whether the instruction that control end sends ties
Beam；
When the controller detects the order fulfillment that the control end sends；Occur one to the motor to stop
Stop signal, makes step motor stop.
Figures 1 and 2 show that a kind of implementation of connecting portion.Fig. 3 and Fig. 4 show another kind of realization side of connecting portion
Formula, as shown in Figure 3 and Figure 4, connecting portion 62 is connected with the end of lever arm 6 by way of being hinged.
Connecting portion 62 includes connection main body 621 and the first engaging lug 622 positioned at connection main body 621 bottom, connects main body
621 cylindrical shapes in upper end open, are provided with the screw thread 625 for connecting live line tool on the inwall for connecting main body 621.
Axis hole is formed with first engaging lug 622, the end of lever arm is provided with the second engaging lug 623, the second engaging lug
Connecting shaft is provided with 623, connecting shaft is rotatably connected in the axis hole on the first engaging lug 622.
Embodiment two
A kind of control method of livewire work device is this embodiment offers, methods described includes：
When the instruction that the controller receives control end transmission opens instruction or lever arm close command for lever arm,
The current location that lever arm is located is detected by institute's displacement sensors；
Calculate the distance between current location and default deployed position or make position that lever arm is located, and according to
The distance for arriving determines the rotation direction of motor and rotates step number；
There is enabling signal to the motor, start motor；
According to the rotation direction and rotation step number of the motor for determining, to motor output electric pulse letter
Number, control motor to corresponding rotation direction rotates corresponding step number；
When the motor reaches described rotation step number, occur one to the motor and stop time delay letter
Number, while stopping output electric pulse signal, make step motor stop.
In the method, when motor stopping is controlled to motor there is a stopping time delayed signal in controller,
Stop output electric pulse signal, further increase the degree of accuracy of control.
Livewire work device provided in an embodiment of the present invention and control method have identical technical characteristic, so also can solve
Certainly identical technical problem, reaches identical technique effect.
In addition, in the description of the embodiment of the present invention, unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to description the present invention and simplify description, rather than indicate or imply indication device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
Finally it should be noted that：Embodiment described above, specific embodiment only of the invention, to illustrate the present invention
Technical scheme, rather than a limitation, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this
It is bright to be described in detail, it will be understood by those within the art that：Any those familiar with the art
The invention discloses technical scope in, it still can modify to the technical scheme described in previous embodiment or can be light
Change is readily conceivable that, or equivalent is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of embodiment of the present invention technical scheme, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (10)
1. a kind of livewire work device, it is characterised in that described device includes insulating bar and travel(l)ing rest；The travel(l)ing rest connects
It is connected on the insulating bar upper end；
The travel(l)ing rest is the box body of boring, and two relative ends of the box body are formed with opening；
Lever arm is provided with the travel(l)ing rest, the lever arm is provided with two, and two lever arms are oppositely arranged, respectively from
Stretch out in the opening that two relative ends of travel(l)ing rest are formed；
Sliver is provided with two relative medial walls of the travel(l)ing rest, the sliver is arranged in the same direction with the lever arm,
For making the lever arm that linear slide is kept when extending and retracting；
The external part of the lever arm is provided with the connecting portion for connecting live line tool；Two lever arms are relative
Side wall on be provided with tooth bar；
On the travel(l)ing rest, and gear is provided between two lever arms, on the gear and the lever arm
Tooth bar is meshed, for driving two lever arms to extend and retract；
The travel(l)ing rest lower end, and control chamber is arranged with outside the insulating bar, it is provided with motor in the control chamber
And the controller being connected with the motor；The motor shaft of the motor is connected with the gear, drives pinion rotation；
Be provided with displacement transducer on a lever arm in two lever arms, institute's displacement sensors be arranged on it is described
The relative other end of the external part of lever arm, and be connected with the controller；
The control end of the controller is arranged at the insulating bar outside；
The controller is used to receive the instruction of control end transmission, and controls the motor according to the instruction for receiving
Rotate；
When the instruction that the controller receives control end transmission opens instruction or lever arm close command for lever arm, pass through
The current location that institute's displacement sensors detection lever arm is located；
Calculate the distance between current location and default deployed position or make position that lever arm is located, and according to obtaining
The distance determines the rotation direction of motor and rotates step number；
There is enabling signal to the motor, start motor；
According to the rotation direction and rotation step number of the motor for determining, to the motor output electric pulse signal,
Control motor to corresponding rotation direction rotates corresponding step number；
When the motor reaches described rotation step number, there is a stopping time delayed signal to the motor, together
When stop output electric pulse signal, make step motor stop.
2. device according to claim 1, it is characterised in that the connecting portion includes the bend pipe by made by elastomeric material,
At an acute angle or right angle connection between two linking arms of the bend pipe, wherein linking arm is socketed in the end of the lever arm
Portion, another linking arm is used to be socketed in the end of live line tool.
3. device according to claim 1, it is characterised in that the end of the connecting portion and the lever arm is by being hinged
Mode connect.
4. device according to claim 3, it is characterised in that the connecting portion includes connection main body and positioned at connection main body
First engaging lug of bottom；
The cylindrical shape of the connection main body in upper end open, is provided with for connecting live line tool on the inwall for connecting main body
Screw thread；
Axis hole is formed with first engaging lug, the end of the lever arm is provided with the second engaging lug, on the second engaging lug
Connecting shaft is provided with, the connecting shaft is rotatably connected in the axis hole on the first engaging lug.
5. device according to claim 1, it is characterised in that the controller is additionally operable to for sending receiving control end
Instruction when, to the motor occur enabling signal, start motor instructed to corresponding rotation direction according to described
Rotate, and detect whether the instruction that control end sends terminates；
When the controller detects the order fulfillment that the control end sends；Occur one to the motor and stop letter
Number, make step motor stop.
6. device according to claim 1, it is characterised in that adopt between the motor shaft of the gear and the motor
With bonded, holding screw connection or interference fit connection.
7. device according to claim 1, it is characterised in that be additionally provided with what is be connected with the gear in the control chamber
Gear shaft；Connected by axle sleeve between the motor shaft of the gear shaft and the motor.
8. device according to claim 1, it is characterised in that institute's displacement sensors include potentiometric displacement sensing
One kind in device, magnetostrictive displacement sensor, conductive plasticss displacement transducer or digital laser displacement transducer.
9. device according to claim 1, it is characterised in that the control end of the controller includes being arranged on the insulation
The nearly bottom of bar open button and closure button, it is described open button and close button be connected with the controller, be used for
The folding of control lever arm.
10. a kind of control method of livewire work device, the livewire work device is any one of claim 1-9
Livewire work device, it is characterised in that methods described includes：
When the instruction that the controller receives control end transmission opens instruction or lever arm close command for lever arm, pass through
The current location that institute's displacement sensors detection lever arm is located；
Calculate the distance between current location and default deployed position or make position that lever arm is located, and according to obtaining
The distance determines the rotation direction of motor and rotates step number；
There is enabling signal to the motor, start motor；
According to the rotation direction and rotation step number of the motor for determining, to the motor output electric pulse signal,
Control motor to corresponding rotation direction rotates corresponding step number；
When the motor reaches described rotation step number, there is a stopping time delayed signal to the motor, together
When stop output electric pulse signal, make step motor stop.
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