CN108682590A - A kind of operating mechanism - Google Patents
A kind of operating mechanism Download PDFInfo
- Publication number
- CN108682590A CN108682590A CN201810582220.8A CN201810582220A CN108682590A CN 108682590 A CN108682590 A CN 108682590A CN 201810582220 A CN201810582220 A CN 201810582220A CN 108682590 A CN108682590 A CN 108682590A
- Authority
- CN
- China
- Prior art keywords
- extremity piece
- bar portion
- operating mechanism
- energy
- spring
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims description 7
- 230000008450 motivation Effects 0.000 claims 1
- 238000004146 energy storage Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000284 extract Substances 0.000 description 2
- 244000273618 Sphenoclea zeylanica Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/40—Power arrangements internal to the switch for operating the driving mechanism using spring motor
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The present invention relates to electric switch fields, particularly to the operating mechanism of electric switch.Operating mechanism includes mechanism plate, energy-stored spring is installed on mechanism plate, spring core rod is equipped in energy-stored spring, spring core rod includes separable plug-in the first bar portion and the second bar portion, it is respectively equipped with extremity piece at the both ends of energy-stored spring, it is connected by pull rod between two end pieces, pull rod is slidably matched at least one extremity piece, and equipped with the adjustment structure for adjusting the distance between two end pieces, first bar portion and the second bar portion are each passed through corresponding extremity piece and with the pushing structures for pushing extremity piece, and first at least one of bar portion and the second bar portion can be extracted from corresponding extremity piece with the unidirectional block cooperation of corresponding extremity piece.Using the present invention, the adjusting of operating mechanism no longer needs to largely dismount parts, and also eliminates the danger being likely to occur when assembly energy-stored spring and ensure that the personal safety of staff while improving working efficiency.
Description
Technical field
The present invention relates to electric switch fields, particularly to the operating mechanism of electric switch.
Background technology
Switch operation mechanism is the important composition part of the electric switches such as high-voltage circuitbreaker, high voltage load switch, is that can lead to
Manpower energy storage or electrical energy storage are crossed, realizes that high-voltage appliance switch contact realizes contact and disengaging by specified operation order and mode
Mechanism, in the process of work, the energy-stored spring of operating mechanism is played provides energy to the making process of high-voltage appliance switch
Effect, affects the technical parameters such as on/off switch speed, the spring of high-voltage switch gear.
The structure of existing operating mechanism is as shown in Figure 1, include middle plate 101, energy-stored spring 102 is by across its endoporus
Spring core rod is mounted on middle plate 101, and the first bar portion 103 of spring core rod and the inserting cooperation of the second bar portion 104 are realized to energy storage
The compression of spring 102.When needing to adjust the decrement of energy-stored spring 102, need the back plate and energy-stored spring of operating mechanism
It all removes and is just adjusted, installation effectiveness is low, and during this, since energy-stored spring 102 belongs to compression spring, also can when mounted
It is cumbersome and have security risk.
Invention content
The purpose of the present invention is to provide a kind of operating mechanism, it is low to have solved existing operating mechanism regulated efficiency, safety
The problem of difference.
To achieve the above object, the technical solution of operating mechanism of the present invention is：A kind of operating mechanism, including mechanism plate, institute
It states and energy-stored spring is installed on mechanism plate, spring core rod is equipped in the energy-stored spring, spring core rod includes separable inserts
The first bar portion and the second bar portion being fitted together are respectively equipped with extremity piece at the both ends of the energy-stored spring, pass through between two end pieces
Pull rod connects, and at least one between pull rod and two end pieces is slidably matched, and equipped with for adjusting the distance between two end pieces
Adjustment structure, first bar portion and the second bar portion are each passed through corresponding extremity piece and with the pushings for pushing extremity piece
Structure, and the unidirectional block cooperation of at least one of the first bar portion and the second bar portion and corresponding extremity piece and can be from corresponding extremity piece
It extracts.
The beneficial effects of the invention are as follows：Spring core rod both ends are directly withstood on energy-stored spring in the prior art, are completely dependent on
The structure of spring core rod constraint is compared, and the present invention is respectively provided with the extremity piece at the both ends of spring core rod, in the first bar portion and
It is provided with the pushing structure in second bar portion, when in use, extremity piece can be pushed by the first, second bar portion come compressed energy-storage bullet
Spring ensures the normal work of operating mechanism, is connected by pull rod between two end pieces, and the adjusting is provided on pull rod
Structure, therefore when needed come compressed energy-storage spring or can keep the compressive state of energy-stored spring by the extremity piece, and in addition the
At least one of one bar portion and the second bar portion can be extracted with the unidirectional block cooperation of corresponding extremity piece from corresponding extremity piece, when need
When adjusting the normal work decrement of energy-stored spring, it is only necessary to by the adjustment structure, energy storage bullet is constrained to press with two end pieces
Spring, the group that the corresponding portion and extremity piece-pull rod of the corresponding portion of spring core rod or spring core rod-energy-stored spring can be formed
Part removes, and then installs or remove corresponding gasket on spring core rod, and after the completion of adjustment, then adjusting yoke is to suitable length
, no longer need to largely dismount parts in whole process, and also eliminate the danger being likely to occur when assembly energy-stored spring
Danger, while improving working efficiency, ensure that the personal safety of staff.
The adjustment structure is threaded adjusting structure.It is because this class formation regulated quantity is easy control using threaded adjusting structure
System, and adjust efficient.
It threaded adjusting structure external screw thread set on pull rod and is constituted with the nut with the external screw thread；Outside
The adjustment structure of screw thread and nut cooperation compared to other kinds of nonstandard thread part for, source is more abundant, and cost is more
Add cheap.
The extremity piece includes the cover body of the cartridge type of single-ended opening and turning edge positioned at cover body open end, the end of energy-stored spring
On the inside of cover body sealing end, turns edge and perforate equipped with pull rod, the cooperation that turns edge of the pull rod and corresponding extremity piece.Cover body-turns edge
On the one hand the extremity piece of structure type can preferably constrain the position of energy-stored spring, be on the other hand also convenient for the peace to pull rod
Dress, certain facility is brought to the assembly of operating mechanism.
It is described to turn edge to turn edge outside.On the one hand it is more prone to process compared to turn edge using outer turn edge, on the other hand may be used
To avoid the flexible of influence energy-stored spring.
Only turn edge outside the forward and backward of the cover body of extremity piece, downside setting are described.Since in operating mechanism product, energy storage bullet
The top of spring is the connecting plate for inputting connecting lever, is only turned edge outside the forward and backward of cover body, downside setting are described here, not on cover body
Side setting turn edge can avoid the connecting plate of input connecting lever, ensure the compactedness of entire operating mechanism.
The cover body is the cover body that cross section is rectangle.Cross section is the cover body of rectangle, and volume can accomplish to minimize, and
And it is easily worked.
The evacuation notch for avoiding operating mechanism other component is equipped at the sealing end of the cover body.Evacuation notch be for
As possible avoid the setting of extremity piece from influencing the original structure of operating mechanism.
First bar portion is mounted on by installing column on the mechanism plate, and the pivot pin of the second bar portion and operating mechanism turns
Arm connects, and at least the second bar portion coordinates with the unidirectional block of corresponding extremity piece and can be extracted from corresponding extremity piece.With the first bar
Portion compares, and the position of the second bar portion easily facilitates dismounting, ensures that the second bar portion can be detached from from corresponding extremity piece, is to carry as far as possible
High removal efficiency.
First, second bar portion coordinates with the unidirectional block of corresponding extremity piece and can be extracted from corresponding extremity piece.First, second
Bar portion can extract, and provide multiple choices for dismounting, be more in line with the demand of Practical Project.
Description of the drawings
Fig. 1 is operating mechanism in the prior art（Remove back plate）Structural schematic diagram；
Fig. 2 is the operating mechanism of the present invention（Remove back plate）Embodiment front view；
Fig. 3 is the upward view of the embodiment of the operating mechanism of the present invention；
Fig. 4 is the structural schematic diagram of extremity piece-rod assembly；
Fig. 5 is the structural schematic diagram of extremity piece.
Specific implementation mode
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
The specific embodiment of the operating mechanism of the present invention, as Figure 2-3, the main composition part of the operating mechanism includes
Foreboard 11, middle plate 12 and back plate 13, foreboard 11, middle plate 12 and back plate 13 are regarded as the mechanism plate of operating mechanism, the present invention
It is optimized primarily directed to the energy-stored spring between plate in operating mechanism 12 and back plate 13, the other parts of operating mechanism are at this
It is not directed in invention, therefore says the dependency structure highlighted at energy-stored spring below.
Energy-stored spring 14 is mounted on the middle plate 12 of operating mechanism, and " being mounted on middle plate " described herein is not to limit storage
There can be direct connection relation between spring 14 and middle plate 12, but saying energy-stored spring 14 finally is carried for installation with middle plate 12
Body is located at the side of middle plate 12.Specifically, energy-stored spring 14 is installed by spring core rod, spring core rod is divided into two
Point, the first bar portion 151 and the second bar portion 152, the first bar portion 151 are solid hopkinson bar, and the second bar portion 152 is hollow stem, the first bar portion
151 are inserted into the abutting end of the second bar portion 152 and make spring core rod forms telescopic rod can be directly by the first bar portion when needing
151 and second bar portion 152 pull away.It is stood with the installation being located on middle plate 12 one end far from the second bar portion 152 of first bar portion 151
Column 16 connects, and the pivot pin connecting lever 17 of one end and operating mechanism far from the first bar portion 151 of the second bar portion 152 connects.
Energy-stored spring 14 is sleeved on spring core rod, can be compressed with the contraction of spring core rod, be extended and extend.In this reality
It applies in example, the both ends of energy-stored spring 14 are respectively provided with extremity piece 18, and the structure of extremity piece is as shown in figure 5, it is located at energy-stored spring two
Extremity piece-rod assembly is constituted by pull rod 19 between the two end pieces 18 at end.In the present embodiment, two extremity pieces 18 with
It is slidably matched between pull rod 19, but in other embodiments, can also only there are one extremity piece 18 it be slidably matched with pull rod 19,
Another is fixed relative to pull rod 19, because the purpose that extremity piece 18 is slidably matched with pull rod 19 is allowed to be to allow two extremity pieces can be mutual
It draws close or separates, it is only necessary to which an extremity piece can be slided relative to pull rod can reach above-mentioned purpose.In the present embodiment, extremity piece 18
Structure referring to Fig. 4, in the present embodiment, extremity piece 18 is the cover body 181 by the tubular of one end open and is located at cover body 181 and is open
182 compositions that turn edge at end turn edge 182 to turn edge outside in the present embodiment, still, in other embodiments, turn edge and 182 may be used also
To be turn edge, because setting turns edge, 182 purpose is to provide for structure coordinate with pull rod 19, and will turn edge 182 is set as interior
It turns edge and obviously also disclosure satisfy that demand.In addition, the cross section of the cover body 181 of extremity piece 18 in the present embodiment is rectangle, this
The purpose of sample design is to require size insensitive occasion in order to compress the size of extremity piece 18 to greatest extent at some, cover
The cross section of body 181 can also be the other shapes other than the rectangles such as circle, ellipse；In the upper of energy-stored spring 14 on middle plate 12
The connecting plate 20 being connect with the input shaft connecting lever of mechanism is provided at side, in order to avoid connecting plate 20, in the present embodiment, only in extremity piece
18 the forward and backward of cover body 181, downside be provided with it is described it is outer turn edge, in the case where not considering the compactedness of operating mechanism entirety,
It can also be also provided with and turn edge in the upper survey of cover body 181, either setting turns edge or before cover body in the upper and lower side of cover body 181
Rear side setting turns edge, these ways are feasible.In order to avoid the pivot pin connecting lever of operating mechanism, at the sealing end of cover body 181
Provided with corresponding notch 183.
Pull rod 19 is installed in the upper set corresponding through-hole that turns edge of extremity piece, and two extremity pieces 18 are linked together, are stored up
At on the inside of the sealing end for the cover body that the both ends of energy spring 14 are located at two extremity pieces 18, formed by extremity piece 18 and pull rod 19
Extremity piece-rod assembly, you can the length of constraint energy-stored spring 14.Regulating mechanism is provided on pull rod 19, to adjust pull rod
Length, i.e. the distance between two end pieces 18, the i.e. decrement of energy-stored spring 14.In the present embodiment, adjustment structure is screw thread tune
Section structure set external screw thread and constitutes with the nut 21 external screw thread with specifically on pull rod, is meeting adjusting
In the case of the function of rod length, it is contemplated that the adjustment structure can also be other nonstandard threaded adjusting structures
（Such as pull rod is the split structure being threadedly coupled）.
The through-hole 184 passed through provided with the respective end for the first, second bar portion on the sealing end of cover body 181, first, second
Pushing structure is provided in bar portion, which formed by the step being located in the first, second bar portion, is pushed to be unidirectional
Structure is only capable of pushing corresponding extremity piece compressed energy-storage spring, but the first, second bar portion cannot be prevented to extract corresponding end
Part.The purpose for the arrangement is that the dismounting to the first, second bar portion for convenience, realizes the tune to energy-stored spring initial compression amount
It is whole, under this purpose, it is contemplated that even one in the first, second bar portion cannot pull away corresponding extremity piece, and can
To realize the adjustment to energy-stored spring initial compression amount.
It after applying the present invention,, can be at operating mechanism when needing to adjust energy-stored spring when there is situations such as closing speed is small
Pull rod, nut are adjusted under non-energy storage state, energy-stored spring is made to be in compressive state, the second bar portion are extracted out, in its bottom and phase
It places at position between the extremity piece answered or removes corresponding thin slice, then reinstall the second bar portion and energy-stored spring can be completed
Installation and adjusting.
In other embodiments of the invention, extremity piece can also be and is directly made of slab construction, in such cases, can be straight
It is connected on the hole that setting coordinates with pull rod on the tablet for constituting extremity piece and the hole coordinated with spring core rod.
Claims (10)
1. a kind of operating mechanism, including mechanism plate, energy-stored spring is installed on the mechanism plate, is equipped in the energy-stored spring
Spring core rod, spring core rod include separable plug-in the first bar portion and the second bar portion, which is characterized in that the storage
It can be respectively equipped with extremity piece at the both ends of spring, be connected by pull rod between two end pieces, it is at least one between pull rod and two end pieces
It is slidably matched, and equipped with the adjustment structure for adjusting the distance between two end pieces, first bar portion and the second bar part
Not Chuan Guo corresponding extremity piece and with pushing structure for pushing extremity piece, and at least one in the first bar portion and the second bar portion
It is a to coordinate with the unidirectional block of corresponding extremity piece and be extracted from corresponding extremity piece.
2. operating mechanism according to claim 1, which is characterized in that the adjustment structure is threaded adjusting structure.
3. operating mechanism according to claim 2, which is characterized in that the threaded adjusting structure is by outer set by pull rod
Screw thread and the nut coordinated with the external screw thread are constituted.
4. operating mechanism according to claim 1 or 2 or 3, which is characterized in that the extremity piece includes the cartridge type of single-ended opening
Cover body and turning edge positioned at cover body open end, the end of energy-stored spring be located on the inside of cover body sealing end, turn edge equipped with pull rod
Perforation, the cooperation that turns edge of the pull rod and corresponding extremity piece.
5. operating mechanism according to claim 4, which is characterized in that described to turn edge to turn edge outside.
6. operating mechanism according to claim 5, which is characterized in that institute only is arranged in the forward and backward of the cover body of extremity piece, downside
State outer turn edge.
7. operating mechanism according to claim 4, which is characterized in that the cover body is the cover body that cross section is rectangle.
8. operating mechanism according to claim 4, which is characterized in that be equipped at the sealing end of the cover body for avoiding behaviour
The evacuation notch of motivation structure other component.
9. operating mechanism according to claim 1 or 2 or 3, which is characterized in that first bar portion is pacified by installing column
On the mechanism plate, the pivot pin connecting lever of the second bar portion and operating mechanism connects, at least the second bar portion and corresponding extremity piece list
Coordinate to block and can be extracted from corresponding extremity piece.
10. operating mechanism according to claim 9, which is characterized in that the first, second bar portion is unidirectional with corresponding extremity piece
Block coordinates and can be extracted from corresponding extremity piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810582220.8A CN108682590A (en) | 2018-06-07 | 2018-06-07 | A kind of operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810582220.8A CN108682590A (en) | 2018-06-07 | 2018-06-07 | A kind of operating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108682590A true CN108682590A (en) | 2018-10-19 |
Family
ID=63810113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810582220.8A Pending CN108682590A (en) | 2018-06-07 | 2018-06-07 | A kind of operating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108682590A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114496668A (en) * | 2021-12-20 | 2022-05-13 | 河南平高电气股份有限公司 | Spring operating mechanism and circuit breaker |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001325862A (en) * | 2000-05-15 | 2001-11-22 | Hitachi Ltd | Fluid-pressure driving device for shut-off device |
| CN201319356Y (en) * | 2008-10-23 | 2009-09-30 | 河南森源电气股份有限公司 | Tool for detaching and regulating spring mechanism of high-voltage circuit breaker |
| JP2011048966A (en) * | 2009-08-26 | 2011-03-10 | Japan Ae Power Systems Corp | Spring operating unit for circuit breaker |
| CN203008134U (en) * | 2012-12-24 | 2013-06-19 | 福建工程学院 | Connection structure of upper column and lower column of assembled box house |
| CN104091702A (en) * | 2014-06-10 | 2014-10-08 | 沈阳昊诚电气股份有限公司 | Outdoor side-installed type spring operation mechanism |
| CN204088167U (en) * | 2014-09-23 | 2015-01-07 | 浙江华仪电器科技有限公司 | A kind of energy storage output mechanism for spring operating mechanism |
| JP2015167093A (en) * | 2014-03-04 | 2015-09-24 | 株式会社日立製作所 | Gas circuit breaker and adjustment method for closing operation spring thereof |
| CN105161328A (en) * | 2015-09-18 | 2015-12-16 | 北海银河开关设备有限公司 | Three-position switch operation mechanism spring device |
| CN105513848A (en) * | 2016-01-12 | 2016-04-20 | 博纳方格（天津）电气设备有限公司 | Spring operating mechanism for circuit breaker |
| CN208352187U (en) * | 2018-06-07 | 2019-01-08 | 河南森源电气股份有限公司 | operating mechanism |
-
2018
- 2018-06-07 CN CN201810582220.8A patent/CN108682590A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001325862A (en) * | 2000-05-15 | 2001-11-22 | Hitachi Ltd | Fluid-pressure driving device for shut-off device |
| CN201319356Y (en) * | 2008-10-23 | 2009-09-30 | 河南森源电气股份有限公司 | Tool for detaching and regulating spring mechanism of high-voltage circuit breaker |
| JP2011048966A (en) * | 2009-08-26 | 2011-03-10 | Japan Ae Power Systems Corp | Spring operating unit for circuit breaker |
| CN203008134U (en) * | 2012-12-24 | 2013-06-19 | 福建工程学院 | Connection structure of upper column and lower column of assembled box house |
| JP2015167093A (en) * | 2014-03-04 | 2015-09-24 | 株式会社日立製作所 | Gas circuit breaker and adjustment method for closing operation spring thereof |
| CN104091702A (en) * | 2014-06-10 | 2014-10-08 | 沈阳昊诚电气股份有限公司 | Outdoor side-installed type spring operation mechanism |
| CN204088167U (en) * | 2014-09-23 | 2015-01-07 | 浙江华仪电器科技有限公司 | A kind of energy storage output mechanism for spring operating mechanism |
| CN105161328A (en) * | 2015-09-18 | 2015-12-16 | 北海银河开关设备有限公司 | Three-position switch operation mechanism spring device |
| CN105513848A (en) * | 2016-01-12 | 2016-04-20 | 博纳方格（天津）电气设备有限公司 | Spring operating mechanism for circuit breaker |
| CN208352187U (en) * | 2018-06-07 | 2019-01-08 | 河南森源电气股份有限公司 | operating mechanism |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114496668A (en) * | 2021-12-20 | 2022-05-13 | 河南平高电气股份有限公司 | Spring operating mechanism and circuit breaker |
| CN114496668B (en) * | 2021-12-20 | 2024-04-05 | 河南平高电气股份有限公司 | Spring operating mechanism and circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0615667B1 (en) | Arrangement for the off-mains switching of control devices | |
| DE112011105423B4 (en) | Electromagnetic actuator | |
| CN108682590A (en) | A kind of operating mechanism | |
| CN208352187U (en) | operating mechanism | |
| CN203760364U (en) | Back door interlocking device of high voltage switch cabinet | |
| CN208521803U (en) | The energy-stored spring regulating device and energy storage component of operating mechanism | |
| AT514219A1 (en) | Electric plug with socket | |
| CN205765853U (en) | A kind of low pressure miniature multi-function screwdriver | |
| CN205488010U (en) | Assistor is changed in portable outdoor high pressure insurance | |
| CN108231450A (en) | High-voltage switch cabinet grounding switch back door interlocking device | |
| CN203882788U (en) | Combined transformer for wind power generation | |
| CN208126954U (en) | Band microswitch direct-push electromagnet | |
| EP2698079B1 (en) | Mains-linked power supply unit | |
| CN106024537B (en) | Circuit-breaker switching on-off tooling | |
| EP0962950B1 (en) | Electronic entertainment equipment with power supply cutoff in standby mode | |
| CN203288942U (en) | Easily prepared high-voltage switchgear | |
| CN204088174U (en) | The opening/closing operation mechanism of vacuum circuit-breaker and comprise the vacuum circuit-breaker of this mechanism | |
| CN106373808B (en) | Breaker with synchronous opening and closing and elastic adjusting device thereof | |
| CN202495383U (en) | Solid-sealed polar pole for vacuum circuit breaker | |
| CN202772040U (en) | Differential pressure regulating switch | |
| CN209169794U (en) | A kind of false cabinet guide rail interlock of improvement type | |
| CN203733709U (en) | Installation structure for closing electromagnet of vacuum circuit breaker | |
| CN207925406U (en) | Relay trigger architecture | |
| CN203690039U (en) | Double power supply exciting circuit capable of controlling electromagnetic coil to work quickly | |
| CN201975330U (en) | Manual switching-in device for burglarproof vacuum circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181019 |
|
| RJ01 | Rejection of invention patent application after publication |