CN105220960B - A kind of ground wire anti-misoperation lock - Google Patents

A kind of ground wire anti-misoperation lock Download PDF

Info

Publication number
CN105220960B
CN105220960B CN201510694161.XA CN201510694161A CN105220960B CN 105220960 B CN105220960 B CN 105220960B CN 201510694161 A CN201510694161 A CN 201510694161A CN 105220960 B CN105220960 B CN 105220960B
Authority
CN
China
Prior art keywords
lock
pin
unlocking
ground wire
installation cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201510694161.XA
Other languages
Chinese (zh)
Other versions
CN105220960A (en
Inventor
叶宏
张海峰
李冀
田军
张文
顾楹罡
翁良杰
张晨晨
王新建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Qihai Intelligent Control Technology Co Ltd
State Grid Corp of China SGCC
Maintenace Co of State Grid Anhui Electric Power Co Ltd
Original Assignee
Wuxi Qihai Intelligent Control Technology Co Ltd
State Grid Corp of China SGCC
Maintenace Co of State Grid Anhui Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuxi Qihai Intelligent Control Technology Co Ltd, State Grid Corp of China SGCC, Maintenace Co of State Grid Anhui Electric Power Co Ltd filed Critical Wuxi Qihai Intelligent Control Technology Co Ltd
Priority to CN201510694161.XA priority Critical patent/CN105220960B/en
Publication of CN105220960A publication Critical patent/CN105220960A/en
Application granted granted Critical
Publication of CN105220960B publication Critical patent/CN105220960B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The present invention relates to a kind of ground wire anti-misoperation lock, including lock body and lock pin, the lock body includes housing, unlocking installation cavity is provided with the housing, locking installation cavity, code identification installation cavity and the lockhole for inserting lock pin, the first unlocking jack being engaged with the noisy key transmission alignment pin of electricity is provided with the code identification installation cavity, the second unlocking jack being engaged with five anti-computer key trip levers and the code identification device being engaged with five anti-computer key wireless probes, lock assembly is provided with the unlocking installation cavity, one end of the lock assembly is provided with the unlocking plunger extended along its end into the first unlocking jack, banking pin is vertically provided with the second unlocking jack, the slide assemblies for being used for driving banking pin unblock or lockup state are provided with the locking installation cavity, the lockhole is four.The present invention improves the processing safety of ground wire, it is to avoid the accident that operating personnel forget installing ground wire and caused in operation occurs.

Description

A kind of ground wire anti-misoperation lock
Technical field
The present invention relates to a kind of anti-misoperation apparatus, and in particular to a kind of ground wire anti-misoperation lock.
Background technology
Ground wire is widely used in power system, and ground wire is connected to the body of equipment mostly, when circuit offside is wrong When operation power transmission or circuit have remaining capacity in itself, it is possible to by the incoming the earth of ground wire, so as to avoid people from being electrically shocked Danger.There is also certain risk while ground wire brings safe, the accident of line power transmission with ground occurs repeatedly in recent years, Massive losses are brought to power network.Need to investigate the ground wire hung in equipment one by one before combined floodgate power transmission.In night time operation by In light problem, operating personnel are difficult to find the position of ground wire, easily to cause the pernicious mistake of leakage dismounting ground wire and combined floodgate power transmission Operating accident.
Grid switching operation is the basic operation in electrical operation, when carrying out grid switching operation, it is necessary to which operation is suitable as defined in following Sequence.Due to the presence of five-defence block, during power transmission is operated, it substantially prevent and do not pluck grounding wire pole progress power transmission operation Accident occurs.But even with the presence of five anti-devices, still there occurs that many rise forgets that removing ground wire just enters in recent years The accident that row closes a floodgate occurs.Reason of searching to the bottom is due to that five anti-devices can be unlocked by force, and often some operating personnel do not press According to regulation five anti-devices have been carried out with the unblock of mistake, or has not followed the pertinent regulations of grid switching operation using short-circuit line and opens Lock tool is unlocked, and result in the generation of accident;Simultaneously because earth terminal is relatively small, easily it is ignored, operating personnel are in operation During forget installing ground wire, while tour personnel checks also inconvenient.
The content of the invention
It is an object of the invention to provide a kind of ground wire anti-misoperation lock, operation lock can improve the operation of ground wire Security, it is to avoid the accident that operating personnel forget installing ground wire and caused in operation occurs.
To achieve the above object, present invention employs following technical scheme:
A kind of ground wire anti-misoperation lock, including lock body and lock pin, the lock body, which includes being provided with housing, the housing, to be opened Lock and set in installation cavity, locking installation cavity, code identification installation cavity and the lockhole for inserting lock pin, the code identification installation cavity Have the first unlocking jack being engaged with electricity noisy key transmission alignment pin, second opening of being engaged with five anti-computer key trip levers Locking group is provided with rosette for lock and the code identification device being engaged with five anti-computer key wireless probes, the unlocking installation cavity Part, one end of the lock assembly is provided with the unlocking plunger extended along its end into the first unlocking jack, and described second unlocks It is vertical in jack to be provided with the Slide Group for being provided with banking pin, the locking installation cavity and being used for driving banking pin unblock or lockup state Part, the lockhole is four, and the slide assemblies could drive slide assemblies to stop by lock pin and the fully mated of lockhole The unblock of pin and locking.
Further, the slide assemblies include horizontally disposed plane slide plate and the connection being slidably mounted in plane slide plate Dynamic leaf spring, the linkage leaf spring has the curved surface bent to the plane slide plate direction, and the curved surface is arranged on lockhole by lock pin Extend deformation to its both sides when interior, the afterbody of the linkage leaf spring is connected by drive link with the banking pin, to pass through connection The transmission of dynamic leaf spring and drive link coordinates carries out locking and unblock to banking pin.
Further, the linkage leaf spring is made up of multiple arch slide plates being arranged in order, the two ends of the arch slide plate It is connected with each other and is horizontally slipped along plane slide plate by the axis of rolling, the drive link and banking pin is slidably installed by first rotating shaft In the housing, and banking pin can be moved by the push-and-pull of drive link between vertically and horizontally.
Further, the lock pin include the lock pin that is sequentially connected buckle, lock pin body and lock pin T heads, set in the lock pin body Have a permanent magnet, the lock assembly include horizontally disposed lock pillar and with the vertically disposed bayonet lock bar of lock pillar, the unlocking plunger The end of lock pillar is fixed on, one end of the bayonet lock bar is fixedly connected by bayonet lock chain with lock pillar, and its other end gos deep into lockhole, And with the joint end being engaged with T recess of lock pin, the outside of joint end is provided with holddown spring, the card in lockhole The inner side of pin rod is provided with the second rotating shaft, by the rotation of lock pillar bayonet lock bar can be driven outwards to rotate.
Further, unlocking fixture is provided between the lockhole and linkage leaf spring, the unlocking fixture includes fixing In the sliding sleeve of lockhole end and the permanent magnetism ejector pin inside sliding sleeve, the magnetic of the permanent magnetism ejector pin and the magnetic of the permanent magnet Property is on the contrary, so that permanent magnetism ejector pin can be by the way that, along sliding sleeve slid inward, the linkage leaf spring passes through permanent magnetism top in the presence of magnetic force The thrust of pin extends deformation to its both sides.
Further, the arch slide plate is four and, the permanent magnetism ejector pin and arch corresponding with the permanent magnetism ejector pin Smooth landing slab is provided between slide plate.
As shown from the above technical solution, ground wire anti-misoperation lock of the present invention, simple in construction, easy to use, leads to The cooperation earth wire crossed with five anti-computer keys carries out management and control, could be anti-electric by five only after ground wire is all connected Brain key is unlocked to ground connection machine, it is to avoid staff maloperation and the accident that causes occurs, improve the operation of power network Reliability, meets the management requirement that ground connection specified in electric power safety code is installed, removed, eliminates ground wire maloperation band The accident come.
Brief description of the drawings
Fig. 1 is the structural representation of lock body of the present invention;
Fig. 2 is structural representation when lock body of the present invention coordinates installation with lock pin;
Fig. 3 is that lock body of the present invention coordinates the structural representation after installation with lock pin;
Partial schematic diagram when Fig. 4 is locking when lock pin coordinates with unlocking fixture.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings:
As shown in Figure 1, 2, the ground wire anti-misoperation lock of the present embodiment, including lock body and lock pin 5, lock body includes housing, Unlocking installation cavity 1, locking installation cavity 2, code identification installation cavity 3 and the lockhole 4 for inserting lock pin 5, coding are provided with housing Identification installation cavity 3 is interior to be provided with the first unlocking jack 31 being engaged with the noisy key transmission alignment pin of electricity and five anti-computer key solutions The second unlocking jack 32 that locking bar is engaged and the code identification device 33 being engaged with five anti-computer key wireless probes, peace of unlocking It behave affectedly in 1 provided with lock assembly, one end of lock assembly is provided with the unlocking pin extended along its end into the first unlocking jack 31 First 11, be vertically provided with banking pin 34, locking installation cavity 2 in the second unlocking jack 32 be provided be used to driving banking pin 34 unlock or The slide assemblies of lockup state, lockhole 4 is four, is respectively used to the patchhole of A, B, C, N earthing pole, slide assemblies pass through lock pin The 5 fully mated unblock that could drive slide assemblies to banking pin 34 and locking with lockhole 4.
The slide assemblies of the present embodiment include horizontally disposed plane slide plate 21 and are slidably mounted in plane slide plate 21 Linked leaf spring 22, and the linkage leaf spring 22 is sequentially connected by multiple arch slide plates and constituted, and the two ends of arch slide plate pass through the axis of rolling 24 It is connected with each other and is horizontally slipped along plane slide plate 21, the arch slide plate has the curved surface bent to the direction of plane slide plate 21, the song Extend deformation to its both sides when face is arranged in lockhole 4 by lock pin 5, the afterbody of linkage leaf spring 22 passes through drive link 23 and stop Pin 34 is connected, and locking and unblock are carried out to banking pin 34 to coordinate by the transmission of link leaf spring 22 and drive link 23.In order to Facilitate the slip of banking pin 34, the drive link 23 and banking pin 34 are slidably installed in the housing by first rotating shaft 25, and stop Pin 34 can be moved by the push-and-pull of drive link 23 between vertically and horizontally, i.e., when lock pin 5 is entirely insertable in lockhole 4 When, its banking pin 34 is horizontally situated or banking pin 34 is tilted to less than the second unlocking jack 32, so that the second unlocking is inserted Hole 32, which is in, opens released state, and now five anti-computer keys can be unlocked by the second unlocking jack 32 to lock body, when When lock pin 5 is all extracted from lockhole 4, banking pin 34 is located at upright position, to stop that five anti-computer key insertions second are unlocked Unlocked in jack 32.Its releasing process is as shown in Figure 2,3.
As shown in figure 4, the lock pin that lock pin 5 includes being sequentially connected is buckled in 51, lock pin body 52 and lock pin T first 53, lock pin body 52 Provided with permanent magnet 521, lock assembly includes horizontally disposed lock pillar 12 and with the vertically disposed bayonet lock bar 13 of lock pillar 12, pin of unlocking First 11 are fixed on the end of lock pillar 12, and one end of bayonet lock bar 13 is fixedly connected by bayonet lock chain 14 with lock pillar 12, and its other end is deep Enter in lockhole 4, and with the joint end 131 being engaged with first 53 recess of lock pin T, the outside of joint end 131 in lockhole 4 Provided with holddown spring 15, the inner side of bayonet lock bar 13 is provided with the second rotating shaft 16, can drive bayonet lock bar by the rotation of lock pillar 12 13 outwards rotations.The rotation of bayonet lock bar 13 for convenience, the bayonet lock chain 14 is fixedly connected by alignment pin 17 with lock pillar, works as lock pin 5 are pushed into lockhole 4, and its side joint end 131 with a slope is lifted under lock pin T first 53 thrust, is further pushed away Enter after lock pin 5, joint end 131 is in the presence of holddown spring 15, insertion lock pin T first 53 recess, to lock lock pin 5.
Unlock for convenience, in the present embodiment, be provided with unlocking fixture 6 between lockhole 4 and linkage leaf spring 22, unlock and fix Part 6 includes the sliding sleeve 61 and the permanent magnetism ejector pin 62 inside sliding sleeve 61 for being fixed on the end of lockhole 4, the magnetic of permanent magnetism ejector pin 62 Magnetic with permanent magnet 521 is on the contrary, so that permanent magnetism ejector pin 62 can be by, along the slid inward of sliding sleeve 61, linking in the presence of magnetic force Leaf spring 22 extends deformation by the thrust of permanent magnetism ejector pin 62 to its both sides.Because in the permanent magnet 521 in lock pin body 52 and sliding sleeve 61 Permanent magnetism ejector pin 62 polarity it is identical, so lock pin 5 often be in thrust.During unlocking, unlocking plunger 11 is rotated clockwise, is made Lock pillar 12 is synchronous to turn clockwise, and the alignment pin 17 being fixed on lock pillar 12 pulls bayonet lock chain 14, bayonet lock bar 13 with the second rotating shaft The 16 synchronous clockwise rotations under power effect, joint end 131 overcomes the power effect of holddown spring 15 to be lifted up, and its lock pin 5 exists Ejected under magneticaction.
In order to increase the motive force of 62 pairs of permanent magnetism ejector pin linkage leaf spring 22, the arch slide plate be four and with permanent magnetism ejector pin 62 It is corresponding, smooth landing slab 63 is provided between permanent magnetism ejector pin 62 and arch slide plate.The one side and linkage board of the smooth landing slab 63 The cambered top end of spring 22 is welded and fixed, and another side low-resistance is smooth and parallel with plane slide plate 21.When incomplete in each lockhole 4 Linkage leaf spring 22 can not be fully extended during insertion lock pin 5, then pin 34 can not be transferred in locking installation cavity clockwise completely, Five anti-computer keys can not then insert the second unlocking jack 32 and be unlocked or recognition and verification lock coding.
When needing hanging earthing conductor to unlock, each lockhole 4 must be the fully-inserted state of lock pin 5, and now link the energy of leaf spring 22 It is fully extended, pin 34 is transferred in locking installation cavity 2 clockwise completely, five anti-computer keys are granted the unlocking of insertion second and inserted Hole 32, if magnetic is locked in ground wire anti-misoperation(Light)The coding of code identification device is identical with five anti-computer key identification codes, then presses After lower five anti-computer key unlocking buttons, its ground wire anti-misoperation lock unlocking plunger 11 will be with five anti-computer key plugs together Bayonet lock bar 13 in rotation, ground wire anti-misoperation lock will be in company with being turned clockwise, and each joint end 131 is opened, and lock pin 5 is in same magnetic The lower ejection lockhole 4 of polar forces effect, realizes and unlocks;If magnetic is locked in ground wire anti-misoperation(Light)The coding of code identification device and five Anti- computer key identification code is differed, and five anti-computer key unlocking buttons can not be pressed, and five anti-computer key plugs can not be rotated, Then ground wire anti-misoperation lock unlocking plunger 11 refuses rotation, will be unable to unlocking hanging earthing conductor.
When needing to remove ground wire, it is necessary to remove all earthing poles, and to must be inserted into ground wire anti-error for all lock pins 5 In operation lock lockpin hole 4, five anti-computer keys could insert first, second unlocking jack 31 and 32 and be unlocked, and ground wire is prevented Magnetic is locked in maloperation(Light)The coding of code identification device is identical with five anti-computer key identification codes, then passes through five anti-computer key schools Core, five anti-computer keys can carry out the unlocking operation of ground connection pole;Lockhole 4 is not inserted into when leaving any pole of ground wire When, then judge that ground wire conductive electrode is not removed completely, five anti-computer keys can not be by checking, refusal next step operation, effectively Overall process carries out ground wire anti-misoperation management.In use, lock pin 5 is connected by connecting line with earthing pole, then by lock pin 5 with Lock body carries out grafting, and in order to avoid maloperation, the length of the connecting line should be less than the length between earthing pole and external equipment, In the present embodiment, the connecting line is preferable over less than or equal to 30cm.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention In various modifications and improvement that case is made, the protection domain that claims of the present invention determination all should be fallen into.

Claims (6)

1. a kind of ground wire anti-misoperation lock, it is characterised in that:Including lock body and lock pin(5), the lock body includes housing, described Unlocking installation cavity is provided with housing(1), locking installation cavity(2), code identification installation cavity(3)With for inserting lock pin(5)Lock Hole(4), the code identification installation cavity(3)Interior be provided with transmits the first unlocking jack that alignment pin is engaged with computer key (31), the second unlocking jack for being engaged with computer key trip lever(32)And the coding being engaged with computer key wireless probe Identifier(33), the unlocking installation cavity(1)Interior to be provided with lock assembly, one end of the lock assembly is provided with along its end to the One unlocking jack(31)The unlocking plunger of interior extension(11), the second unlocking jack(32)It is interior to be vertically provided with banking pin(34), The locking installation cavity(2)Interior be provided with is used to drive banking pin(34)Unblock or the slide assemblies of lockup state, the lockhole(4) For four, the slide assemblies pass through lock pin(5)With lockhole(4)Fully mated could drive slide assemblies to banking pin(34) Unblock and locking.
2. ground wire anti-misoperation lock according to claim 1, it is characterised in that:The slide assemblies include horizontally disposed Plane slide plate(21)And it is slidably mounted on plane slide plate(21)On linkage leaf spring(22), the linkage leaf spring(22)With to The plane slide plate(21)The curved surface of direction bending, the curved surface passes through lock pin(5)Installed in lockhole(4)Extend when interior to its both sides Deformation, the linkage leaf spring(22)Afterbody pass through drive link(23)With the banking pin(34)It is connected, to pass through linkage board Spring(22)And drive link(23)Transmission coordinate to banking pin(34)Carry out locking and unblock.
3. ground wire anti-misoperation lock according to claim 2, it is characterised in that:The linkage leaf spring(22)By it is multiple according to The arch slide plate composition of secondary arrangement, the two ends of the arch slide plate pass through the axis of rolling(24)Be connected with each other and can be along plane slide plate (21)Horizontally slip, the drive link(23)And banking pin(34)Pass through first rotating shaft(25)It is slidably installed in the housing, and only Shelves pin(34)Pass through drive link(23)Push-and-pull can be moved between vertically and horizontally.
4. ground wire anti-misoperation lock according to claim 3, it is characterised in that:The lock pin(5)Including being sequentially connected Lock pin buckle(51), lock pin body(52)With lock pin T heads(53), the lock pin body(52)It is interior to be provided with permanent magnet(521), the locking Component includes horizontally disposed lock pillar(12)And and lock pillar(12)Vertically disposed bayonet lock bar(13), the unlocking plunger(11)Gu It is scheduled on lock pillar(12)End, the bayonet lock bar(13)One end pass through bayonet lock chain(14)With lock pillar(12)It is fixedly connected, its is another Lockhole is goed deep into one end(4)It is interior, and have and lock pin T heads(53)The joint end that recess is engaged(131), positioned at lockhole(4)It is interior Joint end(131)Outside be provided with holddown spring(15), the bayonet lock bar(13)Inner side be provided with the second rotating shaft(16), to pass through Lock pillar(12)Rotation can drive bayonet lock bar(13)Outwards rotation.
5. ground wire anti-misoperation lock according to claim 4, it is characterised in that:The lockhole(4)With linkage leaf spring (22)Between be provided with unlocking fixture(6), the unlocking fixture(6)Including being fixed on lockhole(4)The sliding sleeve of end(61)And Installed in sliding sleeve(61)Internal permanent magnetism ejector pin(62), the permanent magnetism ejector pin(62)Magnetic and the permanent magnet(521)Magnetic Property is on the contrary, so that permanent magnetism ejector pin(62)Can by the presence of magnetic force along sliding sleeve(61)Slid inward, the linkage leaf spring (22)Pass through permanent magnetism ejector pin(62)Thrust to its both sides extend deformation.
6. ground wire anti-misoperation lock according to claim 5, it is characterised in that:The arch slide plate for four and with institute State permanent magnetism ejector pin(62)It is corresponding to set, the permanent magnetism ejector pin(62)Smooth landing slab is provided between arch slide plate(63).
CN201510694161.XA 2015-10-25 2015-10-25 A kind of ground wire anti-misoperation lock Expired - Fee Related CN105220960B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510694161.XA CN105220960B (en) 2015-10-25 2015-10-25 A kind of ground wire anti-misoperation lock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510694161.XA CN105220960B (en) 2015-10-25 2015-10-25 A kind of ground wire anti-misoperation lock

Publications (2)

Publication Number Publication Date
CN105220960A CN105220960A (en) 2016-01-06
CN105220960B true CN105220960B (en) 2017-09-22

Family

ID=54990191

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510694161.XA Expired - Fee Related CN105220960B (en) 2015-10-25 2015-10-25 A kind of ground wire anti-misoperation lock

Country Status (1)

Country Link
CN (1) CN105220960B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108365464A (en) * 2018-01-23 2018-08-03 安徽柒海智能控制技术有限公司 A kind of ground connection end anti-misoperation apparatus and its prevent maloperation method
CN108490814B (en) * 2018-04-27 2020-06-23 国网山东省电力公司聊城供电公司 Switching principle-based transformer substation five-prevention verification method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060202269A1 (en) * 2005-03-08 2006-09-14 Semiconductor Energy Laboratory Co., Ltd. Wireless chip and electronic appliance having the same
CN201421969Y (en) * 2009-05-15 2010-03-10 珠海优特电力科技股份有限公司 Detection locking device of temporary grounding wire
US8890651B2 (en) * 2011-07-20 2014-11-18 Youtech, Inc. Interchangeable lock core and opening method thereof
CN102255393B (en) * 2011-07-29 2013-06-26 重庆大学 Ground wire hanging anti-error blocking system and method thereof
CN102969659B (en) * 2012-11-14 2016-05-11 四川省电力公司内江电业局 Earth connection anti-misoperation apparatus
CN205277083U (en) * 2015-10-25 2016-06-01 国家电网公司 Maloperation lock is prevented to earth connection

Also Published As

Publication number Publication date
CN105220960A (en) 2016-01-06

Similar Documents

Publication Publication Date Title
CN104037580B (en) Prevent misoperation Intelligent earth wire from locking, preventing misoperation control system and control method
CN105488872B (en) Switch cubicle anti-misoperation locking device and its method of work
CN107097674A (en) A kind of charging pile with charging gun locking and position feedback control and its charging method
CN202977776U (en) Ground clamp
CN106526248B (en) Integrated safety measure test junction box and use method
CN205277083U (en) Maloperation lock is prevented to earth connection
CN105220960B (en) A kind of ground wire anti-misoperation lock
CN203967262U (en) Prevent the track traffic ground lock of misoperation
CN205158483U (en) Mechatronic computer key
CN203242898U (en) A misoperation-preventing intelligent ground wire lock and a misoperation-preventing control system
CN205531794U (en) Plug -in card formula direct current fills electric pile rifle terminal tool electromagnetism and allies oneself with locking control device
CN106652108B (en) Electromechanical integration computer key, smart locking device and its working method
CN210350147U (en) Novel grounding wire capable of preventing misoperation
CN108590362A (en) Cable well lid smart lock key and smart lock
CN110635264A (en) Novel grounding wire capable of preventing misoperation
DE202020002100U1 (en) Device, in particular charging station or electric vehicle, and assembly for such a device
CN203014216U (en) Safe electroscope used for 10kV handcart-type high-voltage switch cabinet of transformer station
CN103985576A (en) Forced locking-type ground wire pile
CN104426086A (en) Direct-current electricity-checking grounding equipment and working method thereof
CN211397062U (en) Mechanism box locking auxiliary bolt
CN203521961U (en) DC electrical inspection grounding device
CN108333513B (en) Generator electrical test area interlock system and method of operating same
CN102381170A (en) Electric car battery protective method and electric car battery protective box
CN203588872U (en) Electricity testing locking device
CN108839567B (en) High-voltage safety interlocking system of double-flow electric locomotive

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170922

Termination date: 20191025

CF01 Termination of patent right due to non-payment of annual fee