CN104900445B - A kind of torsion spring pop-up type breaker insulation automatic safety device - Google Patents
A kind of torsion spring pop-up type breaker insulation automatic safety device Download PDFInfo
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- CN104900445B CN104900445B CN201410803353.5A CN201410803353A CN104900445B CN 104900445 B CN104900445 B CN 104900445B CN 201410803353 A CN201410803353 A CN 201410803353A CN 104900445 B CN104900445 B CN 104900445B
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Abstract
A kind of torsion spring pop-up type breaker insulation automatic safety device, belongs to mechanical field.It sets a lower carriage in switch main body support stationary contact；One fore-stock is set on lower carriage；One upper and lower fixed pulley wheel of dragline is set respectively in fore-stock upper and lower part, one upper backup pad is set on the top of fore-stock；Setting one in fore-stock upper end protects loop bar, protection loop bar to be articulated as one by a hinge with upper backup pad；A torsion spring is set with hinge；One static contact protective case is set with static contact position corresponding position in protection loop bar head end；One rope retainer ring is set on operation handle bull stick；One rope is set, and rope head end is affixed with the middle-end of protection loop bar, rope sequentially passes through fixed pulley and main body rack setting under fixed pulley on dragline, upper backup pad, dragline；The end winding of rope is fixed in rope retainer ring.The step of with " protective case is withdrawn, and switch closes a floodgate " and " switch separating brake, protective case covering ", reach the effect of automatic protection.
Description
Technical field
The invention belongs to mechanical field, more particularly to a kind of protection dress for HVAC vacuum circuit breaker static contact
Put.
Background technology
ZW32E-12 type breakers are that applicant is broken in a kind of intelligent Standard type HVAC vacuum developed
Road device.
The type breaker uses three-phase solid-sealed pole type structure, and vacuum interrupter uses longitudinal magnetic field blow-out technology, uses
Silicon rubber/epoxy resin solids insulation, using the combination of spring operating mechanism and permanent magnet mechanism, makes it have small volume, weight
The advantages of light, can both use the long-range divide-shut brake of controller, also can on the spot or controller without electricity when, emergency manual divide-shut brake.Its permanent magnetism
Mechanism uses linear transmission mode, can be prevented effectively from the easy clamping stagnation of conventional springs operating mechanism, the design defect of easy-to-rust so that machine
Structure reliability is substantially improved.
The type breaker is mainly used in the load current during power distribution network cut-offs power system, closes overload and short circuit current.
Be 10kV systems as point, close load current, the protection of overload current and short circuit current is used, it is adaptable to city net or rural power grids conduct
Block switch or interconnection switch, also can be used for rural power grids distribution system outdoor substation as outlet switch, can be with FTU/ intelligence
Controller is used cooperatively, as loop grid segmentation, the automatic detection of branch's outlet failure, isolation and alarm, monitoring circuit
Operation, non-faulting section function of supplying power is recovered with automatic.After breaker configuration measurement, protection, control and communication module, can meet
Distribution automation requirement, it is adaptable to transformer station and industrial and mining enterprises to being protected and being controlled in distribution system, while being also applied for
The place of urban distribution network, rural power grids and frequent operation.
The type breaker can be divided into without disconnecting switch and band disconnecting switch two types.For the installation with disconnecting switch
Mode, its incidental disconnecting switch structure is as shown in Figure 1.As seen from the figure, described disconnecting switch can be divided into moving contact section (custom
Deserve to be called lock) 1 and stationary contact head section (being commonly called as lower lock) 2, the end of wherein moving contact section is connected with the leading-out terminal 4 of disconnecting switch, and it is dynamic
The stage casing of contact section is connected through tappet 7 with the swing rod 6 being arranged on the bull stick 5 of operation handle 3, when operating personnel's rotating operation
During handle, its bull stick drives swing link synchronous to rotate, by driving tappet and then the head end of moving contact section is occurred to rise or is dropped.
When described disconnecting switch carries out " separating brake " to be operated, under the driving of the bull stick of operation handle, the moving contact
The head end (namely what is often called moving contact) of section is promoted by tappet and is lifted up, and departs from the contact with static contact 2-1, realizes "off"
Function, forms an obvious cut-off point on circuit；When described disconnecting switch carries out " combined floodgate " to be operated, moving contact section
Under the drive of operation handle, falls downward is contacted head end with static contact, realizes " connection " function in circuit, so as to
The HVAC vacuum circuit breaker that it is followed by carries out " combined floodgate " operation accordingly.
Because the type breaker is that (i.e. the switch is mounted in outdoor outdoor outdoor pole-mounted, and specific installation form is
On electric pole, therefore " Standard type " formula is referred to as in the industry), then its attached disconnecting switch is also outdoor installation.By
In static contact therein be it is exposed upward easily accumulate the dust granules in rainwater or air out of doors, form spot simultaneously right
Static contact is formed and corroded, and increases its surface contacted resistance, its contact effect is influenceed, when the transmission line of electricity running current at place is larger
When, can also because of the increase of contact resistance at this and contact effect deterioration, cause caloric value to increase severely, when serious, can because it is quiet,
Temperature rise is too high and melting, adhesion occur between moving contact, and the normal work of the whole switch of influence even occurs equipment breakdown, causes
The interruption of normal power supply, the normal operation of influence power transmission loop or transmission line of electricity.
On the one hand the static contact of existing disconnecting switch increases power supply and sets, it is necessary to periodically carry out cleaning and anti-oxidation treatment
Standby line service amount, on the other hand, as static contact is etched with the continuous of moving contact contact site (contact surface), also
The contact resistance between dynamic and static contact can be increased, the safe operation to equipment brings hidden danger.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of torsion spring pop-up type breaker insulation automatic safety device, its
One is provided with exposed static contact can protect and oneself with harmonious the automatically terminating of switch "ON"/" closing " operational motion
The dynamic automatic safety device for implementing protection, also allows for people in ground observation, there is provided breaker insulation protection it is effective, feasible
Method, reached breaker protection technique effect.
The technical scheme is that：A kind of torsion spring pop-up type breaker insulation automatic safety device is provided, including is set
In the disconnecting switch of breaker end of incoming cables, described disconnecting switch includes moving contact section and stationary contact head section, in the upper of stationary contact head section
End, is provided with static contact；The end of its moving contact section is connected with the leading-out terminal of disconnecting switch, one, the stage casing of its moving contact section
Tappet is connected with the swing rod being arranged on operation handle bull stick；It is and described when the operation handle of the disconnecting switch is rotated
The coaxial bull stick of operation handle drives described swing link synchronous rotation, and the end of the swing rod is made circumference and moved with bull stick as the center of circle
It is dynamic, drive described tappet to make elevating movement, and then make the head end of moving contact section that down or up motion to occur, constitute dynamic touching
Agreeing between head section head end and static contact departs from, and realizes the circuit " on " or "off" function of disconnecting switch；Its feature
It is：
In the stationary contact of the disconnecting switch main body rack, a lower carriage is set；One is set on described lower carriage
Fore-stock；In the bottom of the fore-stock, fixed pulley wheel under a dragline is set, fixed pulley is by under one under described dragline
Fixed pulley support is corresponding with described fore-stock affixed；On the top of the fore-stock, fixed pulley on a dragline is set, it is described
Dragline on fixed pulley it is corresponding with described fore-stock affixed by a upper fixed pulley support；On the top of the fore-stock,
One upper backup pad is set；In the upper end of the fore-stock, set one and protect loop bar, described protection loop bar and the upper backup pad
It is articulated as one by a hinge；A torsion spring is set with described hinge；In protection loop bar head end and the institute
Static contact position corresponding position is stated, a static contact protective case is provided with；A rope is set on the bull stick of the operation handle to fix
Ring；On the main body rack and upper backup pad, the longitudinal axis position corresponding position with the rope retainer ring sets first
With the 3rd rope guiding hole；One rope is set, and the head end of the rope is affixed with the middle-end of the protection loop bar, and described rope is successively
The first rope guiding hole under the 3rd rope guiding hole, dragline on through dragline on fixed pulley, upper backup pad on fixed pulley and main body rack
Set；The end winding of the rope is fixed in described rope retainer ring.
When described operation handle and its bull stick are rotated counterclockwise, the end of the moving contact section is risen, and is departed from and institute
After stating the contact of static contact, with the rotation of described operation handle and its bull stick, described rope is wound to be tightened up, and it is located at
Protect the static contact protective case of loop bar head end to decline, be nested on described static contact, to prevent static contact directly exposed in dew
In its environment, it is to avoid it is etched or is contaminated；
When described operation handle and its bull stick are rotated clockwise, with turning for described operation handle and its bull stick
Dynamic, described rope is released, and described protection loop bar end is risen under the elastic reset effect of the torsion spring, positioned at guarantor
The static contact protective case of sheath rod head end rises, and the end of the moving contact section declines, and the dynamic and static contact normally agrees with, electricity
Source is transported to the end of incoming cables of the breaker by described dynamic and static contact, for " combined floodgate " operation of the breaker is provided
Prerequisite；
Described insulation rotation of the automatic safety device by the operation handle and its bull stick, drives described cable tie
The static contact protective case action of dynamic described protection loop bar and head end, for the contact of breaker provides automatic insulation protection work(
Energy.
Specifically, when described operation handle is rotated clockwise around the shaft, described swing rod is clockwise with bull stick
Rotate, and drive tappet to moving down, described moving contact section is rotated counterclockwise and moved down, and is now fixed on the rope and is consolidated
Determine the rope on ring and release is discharged in rotating shaft, described protection loop bar will protect loop bar in the presence of torsion spring reset force
It is lifted up, described protection loop bar around hinge is rotated clockwise, and leaves static contact, moving contact section described afterwards is moved down into
Position, agrees with described static contact.
Specifically, when described operation handle is rotated counterclockwise around the shaft, described swing rod turns counterclockwise with bull stick
It is dynamic, and drive tappet to move upwards, described moving contact section is rotated clockwise and moved up, and is now fixed on the rope and is fixed
Rope on ring is together tightened up in rotating shaft with bull stick wrapped anti-clockwise, and described protection loop bar will in the presence of rope pull
Protection loop bar is pulled down, and described protection loop bar around hinge is rotated clockwise, and is just covered on corresponding static contact, to described
Static contact carry out insulation protection.
Fixed pulley is fixed on described lower fixed pulley support through a lower fixed pulley pivot pin under dragline described in it；It is described
Dragline on fixed pulley be fixed on described upper fixed pulley support through a upper fixed pulley pivot pin.
It is located at first and the 3rd rope guiding hole on the disconnecting switch main body rack and upper backup pad, Yi Jisuo respectively
The longitudinal axis of upper and lower fixed pulley is stated, in same fore-and-aft plane, with the fore-and-aft plane phase where the rope retainer ring
Overlap.
The longitudinal axis of static contact protective case, static contact and the moving contact section head end described in it, positioned at same
In fore-and-aft plane.
Moving contact section, static contact, static contact protective case described in it, protection loop bar, fore-stock, upper backup pad, rope, on
Fixed pulley, lower fixed pulley and rope retainer ring, are arranged in same fore-and-aft plane.
Described insulation automatic safety device can realize the Self-resetting of single or multi-joint static contact with single or multi-joint setting
Insulation protection..
Compared with the prior art, it is an advantage of the invention that：
The technical program employs the action step of " protective case is withdrawn, and switch closes a floodgate " and " switch separating brake, protective case covering "
Suddenly, there is provided with breaker "ON"/" conjunction " close look at the swing, automatically terminate protection and the automatic insulation for implementing protection is automatic
Protection device, overcomes protection inconvenience observation, the problem being awkward in the past to static contact, also allows for people and is seen on ground
Examine, there is provided effective, the feasible method of outdoor type breaker insulation protection, reached the technology effect of breaker automatic protection
Really.
Brief description of the drawings
Fig. 1 is the structural representation of existing disconnector；
Fig. 2 is the side structure schematic view of present invention insulation automatic safety device；
Fig. 3 is the present invention looks up structural representation of Fig. 2；
Fig. 4 is the dimensional structure diagram of present invention insulation automatic safety device.
0 is disconnecting switch main body rack in figure, and 1 is moving contact section, and 2 is stationary contact head section, and 2-1 is static contact, and 3 is manipulator
Handle, 4 is the leading-out terminal of disconnecting switch, and 5 is bull stick, and 6 is swing rod, and 7 is tappet, and 8 is lower carriage, and 9 is upper backup pad, and 10 is preceding
Support, 11A is fixed pulley under dragline, and 11B is fixed pulley on dragline, and 12A is lower fixed pulley support, and 12B is upper fixed pulley support,
14 is protection loop bar, and 15 is static contact protective case, and 16 is rope retainer ring, and 17 is rope, and 18A is torsion spring, and 19 is hinge,
20A is lower fixed pulley pivot pin, and 20B is upper fixed pulley pivot pin, and A1 is the first rope guiding hole, and A3 is the 3rd rope guiding hole.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
In Fig. 1, described disconnecting switch can be divided into moving contact section (being commonly called as brake application) 1 and stationary contact head section (being commonly called as lower lock) 2, its
The end of middle moving contact section is connected with the leading-out terminal 4 of disconnecting switch, the stage casing of its moving contact section through tappet 7 be arranged on operation
Swing rod 6 on the bull stick 5 of handle 3 is connected, and when operating personnel's rotating operation handle, its bull stick drives swing link synchronous to rotate, and leads to
Cross and drive tappet and then the head end of moving contact section is occurred to rise or is dropped.
In Fig. 2 to Fig. 4, technical scheme provides a kind of torsion spring pop-up type breaker insulation automatic protection dress
Put, including be arranged on the disconnecting switch of breaker end of incoming cables, described disconnecting switch includes moving contact section and stationary contact head section, quiet
The upper end of contact section, is provided with static contact；The end of its moving contact section is connected with the leading-out terminal of disconnecting switch, its moving contact section
One, stage casing tappet is connected with the swing rod being arranged on operation handle bull stick；When the operation handle for rotating the disconnecting switch
When, the bull stick coaxial with the operation handle drives described swing link synchronous rotation, and the end of the swing rod is with bull stick as the center of circle
Make circumference movement, drive described tappet to make elevating movement, and then make the head end of moving contact section that down or up motion to occur,
Constitute agreeing between moving contact section head end and static contact or depart from, realize the circuit " on " or "off" work(of disconnecting switch
Energy.
The inventive point of technical solution of the present invention is：The disconnecting switch main body rack 0 stationary contact (be in figure every
Leave the left side or front end for closing main body rack), a lower carriage 8 is set；One fore-stock 10 is set on described lower carriage.
In the bottom of the fore-stock, fixed pulley wheel 11A under a dragline is set, fixed pulley is by one under described dragline
Individual lower fixed pulley support 12A is corresponding with described fore-stock affixed；
On the top of the fore-stock, fixed pulley 11B on a dragline is set, fixed pulley is by one on described dragline
Upper fixed pulley support 12B is corresponding with described fore-stock affixed；
On the top of the fore-stock, a upper backup pad 9 is set；
In the upper end of the fore-stock, set one and protect loop bar 14, described protection loop bar to pass through with the upper backup pad
One hinge 19 is articulated as one；A torsion spring 18A is set with described hinge；
In protection loop bar head end and the static contact position corresponding position, a static contact protective case 15 is provided with；
One rope retainer ring 16 is set on the bull stick of the operation handle；
On the main body rack and upper backup pad, the longitudinal axis position corresponding position with the rope retainer ring, point
The first rope guiding hole A1 and the 3rd rope guiding hole A3 is not correspondingly arranged；
One rope 17 is set, and the head end of the rope is affixed with the middle-end of the protection loop bar, and described rope is worn successively
Fixed pulley on dragline, the first rope guiding hole under the 3rd rope guiding hole, dragline on upper backup pad on fixed pulley and main body rack is crossed to set
Put；The end winding of the rope is fixed in described rope retainer ring.
Fixed pulley is fixed on described lower fixed pulley support through a lower fixed pulley pivot pin 20A under described dragline；Institute
Fixed pulley is fixed on described upper fixed pulley support through a upper fixed pulley pivot pin 20B on the dragline stated.
It is described moving contact section, static contact, static contact protective case, protection loop bar, fore-stock, upper backup pad, rope, upper fixed
Pulley, lower fixed pulley and rope retainer ring, are arranged in same fore-and-aft plane.
Described insulation rotation of the automatic safety device by the operation handle and its bull stick, drives described cable tie
The static contact protective case action of dynamic described protection loop bar and head end, for the contact of breaker provides automatic insulation protection work(
Energy.
When described operation handle is rotated clockwise around the shaft, described swing rod is rotated clockwise with bull stick, and
Drive tappet to moving down, described moving contact section is rotated counterclockwise and moved down, and is now fixed in the rope retainer ring
Rope release is discharged in rotating shaft, described protection loop bar in the presence of torsion spring reset force, will protection loop bar lift upwards
Rise, described protection loop bar around hinge is rotated clockwise, and leaves static contact, moving contact section described afterwards is moved down in place, with institute
The static contact stated agrees with.
When described operation handle is rotated counterclockwise around the shaft, described swing rod is rotated counterclockwise with bull stick, and band
Dynamic tappet is moved upwards, and described moving contact section is rotated clockwise and moved up, and is now fixed in the rope retainer ring
Rope is together tightened up in rotating shaft with bull stick wrapped anti-clockwise, and described protection loop bar is in the presence of rope pull by protective case
Bar is pulled down, and described protection loop bar around hinge is rotated clockwise, and is just covered on corresponding static contact, to described stationary contact
Head carries out insulation protection.
Described insulation automatic safety device can realize the Self-resetting of single or multi-joint static contact with single or multi-joint setting
Insulation protection.
By use said structure and action process, technical scheme employ " protective case is withdrawn, switch close
The action step of lock " and " switch separating brake, protective case covering ", there is provided with breaker "ON"/" conjunctions " close look at the swing, oneself
Dynamic de-preservation and the automatic insulation automatic safety device for implementing protection, overcome protection inconvenience observation conventional to static contact,
The problem being awkward, also allows for whether people are observed in place on ground in face of its action, there is provided breaker insulation protection
Effective, feasible method, reached the technique effect of breaker automatic protection.
The method can be widely used in design and the manufacture field of outdoor type primary cut-out.
Claims (8)
1. a kind of torsion spring pop-up type breaker insulation automatic safety device, including the disconnecting switch of breaker end of incoming cables is arranged on,
Described disconnecting switch includes moving contact section and stationary contact head section, in the upper end of stationary contact head section, is provided with static contact；Its moving contact section
End be connected with the leading-out terminal of disconnecting switch, its moving contact section one, stage casing tappet be arranged on operation handle bull stick
On swing rod connection；When the operation handle of the disconnecting switch is rotated, the bull stick coaxial with the operation handle drives described
Swing link synchronous rotation, the end of the swing rod makees circumference movement, drives described tappet to make lifting fortune by the center of circle of bull stick
It is dynamic, and then make the head end of moving contact section that down or up motion to occur, constitute agreeing between moving contact section head end and static contact
Or depart from, realize the circuit " on " or "off" function of disconnecting switch；It is characterized in that：
In the stationary contact of the disconnecting switch main body rack, a lower carriage is set；
One fore-stock is set on described lower carriage；
In the bottom of the fore-stock, fixed pulley under a dragline is set, fixed pulley by sliding surely under one under described dragline
Wheel support is corresponding with described fore-stock affixed；
On the top of the fore-stock, fixed pulley on a dragline is set, fixed pulley is upper fixed sliding by one on described dragline
Wheel support is corresponding with described fore-stock affixed；
On the top of the fore-stock, a upper backup pad is set；
In the upper end of the fore-stock, set one and protect loop bar, described protection loop bar to be cut with scissors by one with the upper backup pad
Chain is articulated as one；A torsion spring is set with described hinge；
In protection loop bar head end and the static contact position corresponding position, a static contact protective case is provided with；
One rope retainer ring is set on the bull stick of the operation handle；
On the main body rack and upper backup pad, the longitudinal axis position corresponding position with the rope retainer ring sets the
One and the 3rd rope guiding hole；
One rope is set, and the head end of the rope is affixed with the middle-end of the protection loop bar, and described rope sequentially passes through dragline
The first rope guiding hole under the 3rd rope guiding hole, dragline on upper fixed pulley, upper backup pad on fixed pulley and main body rack is set；
The end winding of the rope is fixed in described rope retainer ring；
When described operation handle and its bull stick are rotated counterclockwise, the head end of the moving contact section rises, and departs from quiet with described
After the contact of contact, with the rotation of described operation handle and its bull stick, described rope is wound to be tightened up, and it is located at protection
The static contact protective case of loop bar head end declines, and is nested on described static contact, to prevent static contact directly exposed in outdoor ring
In border, it is to avoid it is etched or is contaminated；
When described operation handle and its bull stick are rotated clockwise, with the rotation of described operation handle and its bull stick, institute
The rope stated is released, and described protection loop bar end is risen under the elastic reset effect of the torsion spring, positioned at protective case
The static contact protective case of bar head end rises, and the head end of the moving contact section declines, and moving contact section head end normally agrees with static contact,
Power supply is transported to the end of incoming cables of the breaker by moving contact section head end with static contact, is " combined floodgate " behaviour of the breaker
Offer prerequisite is provided；
Described insulation rotation of the automatic safety device by the operation handle and its bull stick, drives described rope to drive institute
The static contact protective case action of the protection loop bar and head end stated, for the static contact of breaker provides automatic insulation protection function.
2. according to the torsion spring pop-up type breaker insulation automatic safety device described in claim 1, it is characterized in that as described behaviour
When making handle and rotating clockwise around the shaft, described swing rod is rotated clockwise with bull stick, and drives tappet to moving down, institute
The moving contact section stated is rotated counterclockwise and moved down, and the rope being now fixed in the rope retainer ring discharges pine in rotating shaft
Open, be lifted up for protection loop bar in the presence of torsion spring reset force by described protection loop bar, and described protection loop bar is around hinge
Chain is rotated clockwise, and leaves static contact, and moving contact section described afterwards is moved down in place, is agreed with described static contact.
3. according to the torsion spring pop-up type breaker insulation automatic safety device described in claim 1, it is characterized in that as described behaviour
Make handle to rotate counterclockwise around the shaft, described swing rod is rotated counterclockwise with bull stick, and drive tappet to move upwards, it is described
Moving contact section rotate clockwise and move up, be now fixed on the rope in the rope retainer ring in rotating shaft together with turning
Bar wrapped anti-clockwise is tightened up, and described protection loop bar pulls down protection loop bar in the presence of rope pull, described protection
Loop bar around hinge is rotated clockwise, and is just covered on corresponding static contact, and insulation protection is carried out to described static contact.
4. according to the torsion spring pop-up type breaker insulation automatic safety device described in claim 1, it is characterized in that described dragline
Lower fixed pulley is fixed on described lower fixed pulley support through a lower fixed pulley pivot pin；Fixed pulley is through one on described dragline
Upper fixed pulley pivot pin is fixed on described upper fixed pulley support.
5. according to the torsion spring pop-up type breaker insulation automatic safety device described in claim 1, it is characterized in that being located at institute respectively
State first on disconnecting switch main body rack and upper backup pad and the 3rd rope guiding hole, and on dragline it is fixed under fixed pulley, dragline
The longitudinal axis of pulley, in same fore-and-aft plane, coincides with the fore-and-aft plane where the rope retainer ring.
6. according to the torsion spring pop-up type breaker insulation automatic safety device described in claim 1, it is characterized in that described stationary contact
The longitudinal axis of head protection set, static contact and the moving contact section head end, in same fore-and-aft plane.
7. according to the torsion spring pop-up type breaker insulation automatic safety device described in claim 1, it is characterized in that described is dynamic tactile
It is fixed under fixed pulley, dragline on head section, static contact, static contact protective case, protection loop bar, fore-stock, upper backup pad, rope, dragline
Pulley and rope retainer ring, are arranged in same fore-and-aft plane.
8. according to the torsion spring pop-up type breaker insulation automatic safety device described in claim 1, it is characterized in that described insulation
Automatic safety device can realize the Self-resetting insulation protection of single or multi-joint static contact with single or multi-joint setting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410803353.5A CN104900445B (en) | 2014-12-18 | 2014-12-18 | A kind of torsion spring pop-up type breaker insulation automatic safety device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410803353.5A CN104900445B (en) | 2014-12-18 | 2014-12-18 | A kind of torsion spring pop-up type breaker insulation automatic safety device |
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| CN104900445A CN104900445A (en) | 2015-09-09 |
| CN104900445B true CN104900445B (en) | 2017-06-13 |
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| CN112201502B (en) * | 2020-09-30 | 2023-05-30 | 国网安徽省电力有限公司芜湖市湾沚区供电公司 | Double-cutter unit multipath electric switch device |
| CN114226295B (en) * | 2021-09-28 | 2023-03-14 | 深圳市康宁医院(深圳市精神卫生研究所、深圳市精神卫生中心) | Cleaning device for be used for nuclear magnetic resonance imaging system aperture inner chamber |
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| CN201829401U (en) * | 2010-08-24 | 2011-05-11 | 温州新机电器有限公司 | Cross-the-center closing isolation switch |
| CN203397993U (en) * | 2013-07-19 | 2014-01-15 | 深圳宝安供电局 | Isolating switch protection cover and isolating switch |
| CN203659720U (en) * | 2013-11-28 | 2014-06-18 | 河南中自龙源电气有限公司 | High-voltage isolating switch |
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| CN104900445A (en) | 2015-09-09 |
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