CN106004618A - Engineering power supply vehicle - Google Patents
Engineering power supply vehicle Download PDFInfo
- Publication number
- CN106004618A CN106004618A CN201610483623.8A CN201610483623A CN106004618A CN 106004618 A CN106004618 A CN 106004618A CN 201610483623 A CN201610483623 A CN 201610483623A CN 106004618 A CN106004618 A CN 106004618A
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- cable
- engineering
- electric car
- power
- electric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
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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
- H02G11/00—Arrangements of electric cables or lines between relatively-movable parts
- H02G11/02—Arrangements of electric cables or lines between relatively-movable parts using take-up reel or drum
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
Abstract
An engineering power supply vehicle is used for supplying power to external electric equipment, particularly engineering machines, agricultural machines and the like for field work. The engineering power supply vehicle comprises a movable vehicle body, a signal receiver and transmitter and a controller. The vehicle body is provided with a power generation device, a power conversion device and a cable winding and unwinding device. The power conversion device adjusts power generated by the power generation device, the power is transmitted to the external electric equipment through the cable winding and unwinding device, and the cable winding and unwinding device winds and unwinds cables through a coiling block. The signal receiver and transmitter receives instructions of the external electric equipment, and the controller controls the power conversion device according to the instruction to outputs power required by the external electric equipment. The engineering power supply vehicle can automatically adjust the length of cables so that the external electric equipment can work in a certain stroke range, work rotation capacity is good, environment adaptability is high, and the advantages are more obvious in work zones where oil gas lacks or limitation on noise pollution and waste gas exhaust pollution is strict.
Description
Technical field
The invention belongs to engineering mechanical device technical field, relate to engineering machinery technology, communication technology, control technology.Specifically, it is a kind of engineering confession electric car that can be the engineering mechanical device worked within the specific limits and electric power is provided.
Background technology
Determine most of engineering machinery, farm machinery of present stage all drives with fuel engines, and its advantage is mobility strong, and cross-country ability is high.But it is high to have engine noise simultaneously, exhaust pollution is serious, use cost and the high defect of maintenance cost.Along with country advocates use clean energy resource, and the development of machinery correlation technique, it is increasingly becoming a kind of development trend using electricity as the engineering mechanical device of power source.
Having occurred in that the electronic engineering machinery such as electric excavator in the world today, it is without discharge, and low noise, the feature of low use cost is not available for Traditional project machinery.Although it is with the obvious advantage, but it is restricted by condition of power supply, can not be used widely because being difficult to find that suitable power supply when working in some environment such as field, desert.There is the engineering movably generated electricity by fuel electric generator at present for electric car, but its volume is big, has exhaust pollution.Also having as the battery of Emergency Power during disaster for electric car, although non-exhaust emission, but volume is big, mobility is poor, and cost is high, and purposes is narrow.
Summary of the invention
The invention solves the problems that problem of the prior art, the engineering visualized can overcome the problems referred to above well for electric car, greatly promote the motorized of engineering machinery, and this power supply unit is easily achieved centralization, intelligent overall management controls, can more efficiently, reliably and securely fulfil assignment.
For reaching above-mentioned purpose, the technical solution used in the present invention is as follows:
Engineering is for electric car, and for powering to external electric equipment, described engineering includes for electric car:
Movably car body, election power generation devices, power-converting device and cable reel installation are installed on described car body, described power-converting device regulates the electric power that described election power generation devices produces, and it is delivered to external electric equipment by cable reel installation, cable reel installation passes through reel automatic deploying and retracting cable, and its automatic deploying and retracting can be realized by wind spring or motor；
Described engineering also includes for electric car:
Signal receives emitter and controller, and described signal receives the instruction of transmitter receipt external electric equipment, and described controller controls the electric power needed for power-converting device output external electric equipment according to instruction.
Preferably, described cable reel installation is provided with sensing device, for detecting cable length remaining in cable reel installation；Described sensing device is provided with:
Alarm device, for, during when cable length deficiency remaining during sensing device detects cable reel installation, sending alarm signal to outside；
Emergency braking device, after cable length deficiency remaining in sensing device detects cable reel installation sends alarm signal, continuation stretching cable, to when limiting length, is automatically stopped the electric power output of election power generation devices.
Preferably, the cable output end of described cable reel installation is provided with cable tension sensing device, and when cable is exceeded certain value by external tensile force, the cable drum in draw off gear rotates to the direction that cable is released, when external tensile force is less than setting value, cable drum rotates to cable shrinkage direction.Meanwhile, cable tension sensing device also makes cable remain unsettled state.
Preferably, the cable output end of described cable reel installation is provided with guider, makes cable reel installation marshalling when folding and unfolding cable.
Preferably, described cable reel installation is provided with brake unit, the action of the automatic deploying and retracting cable of cable reel installation can be stopped.
Preferably, described cable reel installation lies against the described engineering top for electric car, and in cable reel installation, the rotary shaft of reel is perpendicular to engineering for electric car horizontal plane.
Preferably, in described cable reel installation, the height of reel is less than the octuple of cable size.
Preferably, described election power generation devices can be electromotor or accumulator, and during for accumulator, being provided with charger by external power is accumulator charging.
Preferably, it is provided with electric quantity monitoring device, for the dump energy of monitoring accumulator in real time and by signal reception emitter, signal is sent to external electric equipment.Certainly, except dump energy, also can monitor in real time and send the information such as temperature.
Preferably, the described signal receiving/transmission device supplied on electric car and electrical equipment carry out the mutual transmission of signal and instruction by radio wave.
Preferably, described engineering for electric car be moved through external equipment traction drive.
Preferably, described engineering independently drives for the electric power being moved through election power generation devices generation of electric car.
The beneficial effects of the present invention is: use cost and maintenance cost are low, volume is little, and mobility is good, and purposes is wide, can be automatically adjusted cable length makes external electric equipment work in certain stroke range, rotation work ability is good, and ambient adaptability is high, can carry out signal communication with front truck simultaneously, ensure that cable secure uses, become apparent from the work area advantage of some petroleum shortages in particular by accumulator, have noise low when densely populated municipal construction, without the advantage of exhaust pollution.
Accompanying drawing explanation
Fig. 1 is the structural representation that can not independently drive for electric car of the present invention.
Fig. 2 is the structural representation that can independently drive for electric car of the present invention.
Fig. 3 is that the present invention is for the radial cross-section of guider in the cable reel installation of electric car.
Fig. 4 is that the present invention is for the axial sectional view of guider in the cable reel installation of electric car.
In figure: 1, car body；2, accumulator；3, power-converting device；4, cable reel installation；4.1, cable；4.2, reel；4.3, guider；4.4, brake unit；5, signal receives emitter；6, controller；7, charger；8, external power source；9, electric automobile；9.1, motor；9.2, signal receiving/transmission device；9.3, device is controlled.
Detailed description of the invention
Below by detailed description of the invention and accompanying drawing, the present invention is further illustrated.
Embodiment one: as shown in Figure 1, engineering is for electric car, it is moved through external equipment traction drive, including: movably car body 1, on car body 1, election power generation devices is installed, power-converting device 3 and cable reel installation 4, in the present embodiment, election power generation devices is accumulator 2, simultaneously equipped with charger 7, can charge for accumulator 2 with external power source 8 needs when, power-converting device 3 regulates the electric power that accumulator 2 produces, and it is delivered to external electric equipment by cable reel installation 4, cable reel installation 4 is by reel 4.2 automatic deploying and retracting cable 4.1, cable reel installation 4 lies against the engineering top for electric car, and the rotary shaft of reel 4.2 is perpendicular to engineering for electric car horizontal plane in cable reel installation 4；Car body 1 is also equipped with signal and receives emitter 5 and controller 6, signal receives emitter 5 and receives the instruction of external electric equipment, controller 6 controls power-converting device 3 according to instruction and exports the electric power needed for external electric equipment, such as the power frequency specified, voltage or electric current.
Wherein, cable reel installation 4 is provided with sensing device, for detecting cable 4.1 length remaining in cable reel installation 4；Sensing device is additionally provided with alarm device and emergency braking device, alarm device is for during when cable 4.1 curtailment remaining during sensing device detects cable reel installation 4, alarm signal is sent to outside, emergency braking device is after cable 4.1 curtailment remaining in sensing device detects cable reel installation 4 sends alarm signal, when continuing stretching cable 4.1 to restriction length, it is automatically stopped the electric power output of accumulator 2.Alarm signal both can be sent for the body of electric car by engineering, it is also possible to receiving emitter 5 by signal and send to external electric equipment, signal includes the form such as sound, light.
Wherein, having cable tension sensing device in cable reel installation 4, when cable 4.1 is exceeded certain value by external tensile force, the reel 4.2 in cable reel installation 4 rotates to the direction that cable 4.1 is released, when external tensile force is less than setting value, reel 4.2 rotates to cable 4.1 shrinkage direction.And cable 4.1 outfan of cable reel installation 4 is provided with guider 4.3, make cable reel installation 4 marshalling when folding and unfolding cable 4.1.
Additionally, cable reel installation 4 is provided with brake unit 4.4, the action of the automatic deploying and retracting cable 4.1 of cable reel installation 4 can be stopped needing when, especially can prevent cable 4.1 from quickly drawing back when cable 4.1 outfan departs from external electric equipment and cause a hidden trouble.
Stablizing when moving for guarantee engineering for electric car and work, in cable reel installation 4, the height of reel 4.2 is less than the octuple of cable 4.1 diameter.
It is also equipped with electric quantity monitoring device at moveable car body 1, for the dump energy of monitoring accumulator 2 in real time and is sent to external electric equipment by signal reception 5 signals of emitter, allows an operator to notice at any time charge condition.
When outside electromechanical, time as to be started working in the manipulator on excavator, need, first the receiving end supplying the cable 4.1 on electric car to receive excavator, then to open for the control switch on electric car, make to be in holding state for electric car.It is then return in the driver's cabin of excavator, accepts discharger by the signal of excavator end and send electric power output order to the signal reception emitter 5 for electric car end.Such as, excavator is 3 phase asynchronous generators, it is possible to require that regulation is for the power-converting device 3 of electric car, it is typically converter, power frequency required by offer, and determine the motor speed on excavator, make excavator can the most arbitrarily regulate his operating rate.
Often converter is placed in electrical equipment on general electric machinery, and the electric power of standard is provided from external power source 8.But due to the working environment very severe of engineering machinery, general converter is difficult to meet the requirement of this working environment, so, high performance electronic engineering machinery reality is extremely difficult.And this patent is put into engineering on electric car converter, it is easily controlled than on excavator for the environment on electric car, it is possible to the arbitrary form required for excavator, the electric power of arbitrary size is provided, and makes the power performance of excavator more preferable.
After excavator manipulator starts working, machinery to be operated forward-reverse frequently, or left rotation and right rotation, cable 4.1 also can be pulled out therewith a little while and be decontroled a little while, for preventing cable 4.1 from being trampled by machinery in the work process of excavator, or it is wrapped on the barrier of centre, in time according to the duty of excavator cable 4.1 is regained or to be released for the cable reel installation 4 on electric car.A kind of typical folding and unfolding mode is with scroll spring band movable reel 4.2, around cable 4.1 on reel 4.2.When excavator is in time moving away from the direction for electric car, and the motive force of excavator is far longer than the spring force of turbine spring, and cable 4.1 will be drawn out；When excavator moves to the direction close for electric car, cable 4.1 is the most released, and spring will automatically retract cable 4.1.
In order to make cable 4.1 not contact or contact less ground as far as possible, and reducing cable 4.1 by the abrasion in movement, it is optimum position that twisted and released of the cable line apparatus 4 is placed on the top for electric car.If the rotary shaft allowing cable reel installation 4 is placed on the parallel direction for electric car also possible, but because the cable 4.1 for engineering machinery work the most all compares slightly, this is accomplished by reel 4.2 bigger diameter, so will result in the center of gravity for electric trolley body 1 too high, and affect the mobility for electric car.So, cable reel installation 4 is made flat pattern, allows rotary shaft be perpendicular to the ground level for electric car, be the optimum position of cable reel installation 4.When reel 4.2 is horizontal, the excessive height of reel 4.2 should not be allowed, otherwise cause due to the gravity of cable 4.1 self cable 4.1 to be wrapped in reel 4.2 phenomenon below too much, and be not easy cable 4.1 to be neatly wound around.Can not neatly be wound around, cable reel installation 4 is just not easy stable work, and therefore the Breadth Maximum of reel 4.2 is less than 8 times of cable 4.1 diameter.
In real work, excavator cannot limit with the relative position for electric car, during in order to be able to make cable 4.1 orientation in office, cable 4.1 can be neat circle on reel 4.2, in cable 4.1 exit of cable reel installation 4, guider 4.3 is set, no matter its effect is to make excavator in any orientation for electric car, can be maintained at when cable 4.1 enters rotating disk in same angle, thus can guarantee that cable 4.1 can neat being wrapped on reel 4.2.As shown in Figure 3 and Figure 4, being a kind of typical structure of guider 4.3, it is made up of two groups of rolling wheel supports of front and back, each rolling wheel support is made up of 4 rollers, make cable 4.1 enter guider 4.3 the most in any direction, with guider 4.3 all in Structure deformation, and do not produce friction；Leaving a certain distance L between these two groups of rollers, this distance L is typically no less than 1.0 times of cable 4.1 diameter D.This guider 4.3 ensures that cable 4.1 is always at metastable angle when entering cable reel installation 4, and ensures the neat winding of cable 4.1.
When manipulator is operated in driver's cabin, often cannot notice the position for electric car, when excavator goes too far, and beyond during for electric car available cable 4.1 length, cable 4.1 sensing device for electric car will send alarm signal, and the manipulator alerting excavator notes working range, or engineering is for the position of electric car.But cable 4.1 remaining lengths at this moment also has certain surplus, can allow and excavate the work that tractor driver completes to be carrying out.This length is limited; if excavator works on and exceedes this limit, for electric car will the switch of force disconnect electric power output apparatus, and cut off the power of excavator; it can not be moved on, is not pulled off for the cable 4.1 of electric car with protection.The simplest method of function realizing this sensing device is to install two travel switches, illustrate that when the two travel switch pushed down by cable 4.1 cable 4.1 also has surplus, when cable 4.1 is gradually released and is disengaged first travel switch, illustrate that the residual of cable 4.1 starts deficiency, i.e. send out warning；When second travel switch is disengaged, electric power output apparatus is just automatically cut off.
Different from electrical network for available electric power on electric car, there is certain limit, it is impossible to infinitely use.Reducing the electric quantity consumption for electric car, the time for electric car that extends also is one of key of excavator portable high workload efficiency.Manipulator can be helped to adjust operational approach in time to accumulator 2 residual excavated in tractor driver reports for electric car in real time for electric car, it is contemplated that operable time.A kind of attainable method is exactly accumulator 2 voltage of power-converting device 3 input to be received emitter by controller 6 and signal send out 5 to excavator.
When excavator end-of-job, or when supplying the electricity of electric car to be finished, it is necessary to cable 4.1 is freed from excavator and comes, then cable 4.1 is recovered in cable reel installation 4, then drawn charging.But as it was previously stated, it is power that reel 4.2 is probably useful scroll spring, and because cable 4.1 is the thickest but also long, the contractility of spring is the biggest.So, when cable 4.1 is freed from excavator come time, cable 4.1 can lose suddenly pulling force, wind spring can with cable 4.1 at full speed in cable reel installation 4 regain.The withdrawal that the thickest cable 4.1 is at full speed, it is easy to be thrown on people or the article of surrounding, and cause unnecessary damage.For solving this problem, cable 4.1 is being received electrical equipment, or cable 4.1 is being freed from electrical equipment when coming, needing a brake unit 4.4 is installed.One feasible mode is to install the device of a similar latch on cable reel installation 4, need not allow volume, and 4.2 just plug latch when rotating, when allowing that it rotates, just latch being extracted, the plug of this latch can be with manually, it is also possible to uses magnet control.
After cable 4.1 is reclaimed by cable reel installation 4, the state that can move freely just it has been returned to for electric car, because its own is with charger 7, charger 7 can external power source 8 as grid power become can be to the high direct voltage electric power that charge of accumulator 2, charging current can also arbitrarily adjust.So moving to any place having power supply for electric car, can charge for it.Additionally, the power supply etc. such as solar energy or wind power generation can also use.
Charge complete after, may be at the most again holding state for electric car, provide electric power for any motor machine that there is a need to power reguirements.
Embodiment two: as shown in Figure 2, difference with embodiment one is, engineering independently drives for the electric power being moved through the generation of election power generation devices i.e. accumulator 2 of electric car, specifically, engineering is electric automobile 9 for the car body 1 of electric car, the electric power of its motor 9.1 comes from for the power-converting device 3 on electric car, when operating electric vehicle 9 moves, control device 9.3 and can send instruction by the signal receiving/transmission device 9.2 on electric automobile 9, after signal reception emitter 5 reception of electric car, the power-converting device 3 for electric car is allowed to provide the electric power of frequency required for electric automobile 9, and drive electric automobile 9 to move.But electric automobile 9 is powered and is powered can not carry out to external electric equipment in systems, and electric automobile 9 is enjoyed more higher priority control than external equipment simultaneously.
Embodiment three: do not emphasize the signal connected mode for electric car Yu electric car in embodiment one and embodiment two, can use wired connection, it is also possible to connect with wireless telecommunications.But it practice, need to carry out folding and unfolding cable 4.1 with cable reel installation 4 because of between two cars, so, if the most additional signal transmssion line, cable 4.1 folding and unfolding will be extremely difficult.Feasible method has two kinds, and one is to add one group of holding wire in the middle of cable 4.1 line of transmission electric power, needs the signal of transmission to become digital signal string, alternating transmission on both sides, after passing to the other side, then this digital string signal is decomposed into the instruction controlling distinct device.Such as, the speed-regulating signal of manipulator on excavator, after being transferred to supply on electric car, just it is fed to converter, and changes the setting value of the output frequency of converter.For the cable 4.1 curtailment alarm signal on electric car, by time on conduction excavator, will be sent on Mel device, and allow Mel device give a warning.
Another kind is to transmit with wireless communication mode, i.e. needs a plurality of signals spread out of to line up train of signal both sides, passes to the other side by radio wave, and accept the signal that the other side is transmitted.Then the same with aforementioned wire transmission, the train of signal being subject to is disassembled and controls relevant device.The most both can realize the mutual Control function of height, the most not affect both mutual motions.
Implement row four: the cable reel installation 4 in above-described embodiment is for the example being used as power with scroll spring, it is also possible to makes the driving power of reel 4.2 of motor, and judges that motor is should take-up or unwrapping wire by the moment of torsion suffered by perception motor.Certainly the retractable cable of motor also can be determined by the control of people.
Embodiment five: combine shown in Fig. 1, the difference with embodiment two is, for electric car oneself not Tape movement power, but the front portion of car have one can trailed device.So can be by the mechanical traction of any driving power having driving power for electric car.Such as automobile, truck, it is also possible to be with the traction of electromechanical itself.Such as excavator can also walk back and forth in power supply for electric car in tow as hitching machinery.So there is no need to there is special actuating unit for electric car, and reduce the manufacturing cost for electric car.
Except accumulator 2 structure among above-mentioned several embodiments, the election power generation devices of the present invention can also be electromotor, such as fuel electric generator, this kind of structure avoids the need for charger 7 and external power source 8, accordingly, what power-converting device 3 passed through control is the electric power of the power control output of electromotor, and electric quantity monitoring device can also change oil mass monitoring device into.
The foregoing is only the specific embodiment of the present invention, but the architectural feature of the present invention is not limited thereto, the present invention may be used on the product that is similar to, and any those skilled in the art is in the field of the invention, and the change made or modify all is contained among the scope of the claims of the present invention.
Claims (10)
1. engineering is for electric car, for powering to external electric equipment, it is characterised in that described engineering includes for electric car:
Movably car body, election power generation devices, power-converting device and cable reel installation are installed on described car body, described power-converting device regulates the electric power that described election power generation devices produces, and it being delivered to external electric equipment by cable reel installation, cable reel installation passes through reel automatic deploying and retracting cable；
Described engineering also includes for electric car:
Signal receives emitter and controller, and described signal receives the instruction of transmitter receipt external electric equipment, and described controller controls the electric power needed for power-converting device output external electric equipment according to instruction.
Engineering the most according to claim 1 is for electric car, it is characterised in that: described cable reel installation is provided with sensing device, for detecting cable length remaining in cable reel installation；
Described sensing device is provided with:
Alarm device, for, during when cable length deficiency remaining during sensing device detects cable reel installation, sending alarm signal to outside；
Emergency braking device, after cable length deficiency remaining in sensing device detects cable reel installation sends alarm signal, continuation stretching cable, to when limiting length, is automatically stopped the electric power output of election power generation devices.
Engineering the most according to claim 1 is for electric car, it is characterized in that: the cable output end of described cable reel installation is provided with cable tension sensing device, when cable is exceeded certain value by external tensile force, cable drum in draw off gear rotates to the direction that cable is released, when external tensile force is less than setting value, cable drum rotates to cable shrinkage direction.
Engineering the most according to claim 1 is for electric car, it is characterised in that: the cable output end of described cable reel installation is provided with guider, makes cable reel installation marshalling when folding and unfolding cable.
Engineering the most according to claim 4 is for electric car, it is characterised in that: described cable reel installation is provided with brake unit, the action of the automatic deploying and retracting cable of cable reel installation can be stopped.
Engineering the most according to claim 1 is for electric car, it is characterized in that: described cable reel installation lies against the described engineering top for electric car, and the rotary shaft of reel is perpendicular to engineering for the height of reel in electric car horizontal plane, and described cable reel installation less than the octuple of cable size in cable reel installation.
7. according to the engineering described in any one of claim 1-6 for electric car, it is characterised in that: described election power generation devices can be accumulator, and to be provided with charger and be transformed into by outer power voltage can be the voltage that charges of accumulator.
Engineering the most according to claim 7 is for electric car, it is characterised in that: it is provided with electric quantity monitoring device, for the dump energy of monitoring accumulator in real time and by signal reception emitter, signal is sent to external electric equipment.
Engineering the most according to claim 1 is for electric car, it is characterised in that: the described signal receiving/transmission device supplied on electric car and electrical equipment carry out the mutual transmission of signal and instruction by radio wave.
Engineering the most according to claim 7 is for electric car, it is characterised in that: described engineering independently drives for the electric power being moved through election power generation devices generation of electric car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610483623.8A CN106004618B (en) | 2016-06-28 | 2016-06-28 | Engineering is for electric car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610483623.8A CN106004618B (en) | 2016-06-28 | 2016-06-28 | Engineering is for electric car |
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| CN106004618A true CN106004618A (en) | 2016-10-12 |
| CN106004618B CN106004618B (en) | 2019-01-01 |
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| CN201610483623.8A Active CN106004618B (en) | 2016-06-28 | 2016-06-28 | Engineering is for electric car |
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| CN106891734A (en) * | 2017-04-05 | 2017-06-27 | 杭州蓝力电动科技有限公司 | Plural serial stage moves electric power system |
| CN110039036A (en) * | 2019-04-19 | 2019-07-23 | 山信软件股份有限公司 | A kind of converter buggy ladle, the slag car are anti-to open overtravel technology |
| CN111416247A (en) * | 2020-01-21 | 2020-07-14 | 国网浙江省电力有限公司湖州供电公司 | Multifunctional power supply vehicle |
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| CN111416247B (en) * | 2020-01-21 | 2021-11-26 | 国网浙江省电力有限公司湖州供电公司 | Multifunctional power supply vehicle |
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