CN104882307B - A kind of isolator operating mechanism of solid insulation ring main unit - Google Patents
A kind of isolator operating mechanism of solid insulation ring main unit Download PDFInfo
- Publication number
- CN104882307B CN104882307B CN201510339153.3A CN201510339153A CN104882307B CN 104882307 B CN104882307 B CN 104882307B CN 201510339153 A CN201510339153 A CN 201510339153A CN 104882307 B CN104882307 B CN 104882307B
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- China
- Prior art keywords
- bar
- gear
- transition gear
- driven gear
- transition
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a kind of isolator operating mechanism of solid insulation ring main unit, including disconnecting switch drive shaft, driving gear, driven gear A, driven gear B, transition gear A and transition gear B, driving gear is fixedly mounted in disconnecting switch drive shaft, driven gear A is engaged with driving gear and transition gear A simultaneously, transition gear B is engaged with transition gear A and driven gear B simultaneously, bar A and bar B has been respectively fixedly connected with driven gear A and driven gear B, the external part of bar A and bar B is hinged with one end of bar C and bar D respectively, the other end of bar C and bar D is hinged and while being connected with the upper end of intermediate member, the lower end of intermediate member is connected with three-phase ground axle；The bar A, bar B, bar C and bar D constitute rhombus, and transition gear A and transition gear B is located in rhombus.The present invention can make the distance between earth terminal H >=125mm under grounding shaft and fuse in the case where the other structures of existing solid insulation ring main unit are not changed.
Description
Technical field
The present invention relates to a kind of isolator operating mechanism of solid insulation ring main unit, for 12KV solid insulation ring main units
Middle on-load switch -- electric conductor ground connection under the fuse in fuse combined electric apparatus scheme.
Background technology
Solid insulation ring main unit is the new product that State Power Corporation recommends in recent years, its most representational scheme
It is on-load switch -- fuse combined electric apparatus scheme, the general structure of its core cell are shown in Fig. 1, by load switch body 2, transmission
Mechanism case 1, isolator operating mechanism 5, fuse assembly 4 and frame 3 are constituted.The structure of fuse general assembly such as Fig. 2, Fig. 3 institute
Show, when ring main unit runs, electric current is input into from upper electric conductor 2, is exported to lower electric conductor 5 by upper fingertip 1, melt 3, lower fingertip 4.
In switch-fuse combination scheme, in order to ensure personal safety when overhauling, it is desirable to open in the preload of maintenance
Separating brake is closed, major loop ground switch closes a floodgate, and the lower electric conductor 5 of fuse should be able to reliable ground.The ground connection of electric conductor under fuse
It is to be abutted against the earth's axis 6 to be inserted realizing.Fig. 2 is ground state, in the lower electric conductor 5 of the now insertion of grounding shaft 6, conductive under fuse
Body 5 is grounded, it is ensured that safety during maintenance；Fig. 3 is ground connection off-state, and now grounding shaft 6 is separated with lower electric conductor 5, ring main unit
Can be powered operation.
The problem that existing solid insulation ring main unit is present is：When ring main unit runs, fuse grounding shaft should depart from lower conduction
Body, forms a fracture, and this fracture must is fulfilled for insulation conditions relatively.If air insulation is adopted between fracture, connect
Fracture under the earth's axis and fuse between earth terminal should be not less than 125mm apart from H (Fig. 3), just can guarantee that the safety of equipment operation.
But as the straight-line mechanism linked with isolator operating mechanism uses rocking bar-double-slider structure, as shown in figure 4, in order to
Parts 3 when making connecting lever 4 swing to upper end not with isolator operating mechanism 1 are interfered, thereon, the total angle of lower swing
No more than 72 °, the movement travel that grounding shaft 2 can be obtained is only 78mm.In order to ensure electric conductor under grounding shaft 2 and fuse
Between have enough insulation, be forced in shown in Fig. 3 injection transformer oil in secondary cylinder 8 and constitute compound inslation.But adopt transformer oil
The concept of solid insulation is not met, the requirement of high-voltage switch gear non-oil ultra high vacuum system has also been run counter to.Particularly when because condensation is accumulated in secondary cylinder
Water, it is likely that serious accident can be caused.
The content of the invention
It is an object of the invention to provide a kind of other structures that need not change existing solid insulation ring main unit, can just make to connect
The isolator operating mechanism of the solid insulation ring main unit of the distance between earth terminal H >=125mm under the earth's axis and fuse.
The isolator operating mechanism of the solid insulation ring main unit that the present invention is provided includes disconnecting switch drive shaft, driving tooth
Wheel, driven gear A, driven gear B, transition gear A and transition gear B, driving gear are fixedly mounted on disconnecting switch drive shaft
On, driven gear A is engaged with driving gear and transition gear A simultaneously, transition gear B simultaneously with transition gear A and driven gear B
Engagement, be respectively fixedly connected with driven gear A and driven gear B the external part of bar A and bar B, bar A and bar B respectively with bar C
It is hinged with one end of bar D, the other end of bar C and bar D is hinged and while is connected with the upper end of intermediate member, intermediate member
Lower end be connected with three-phase ground axle；The bar A, bar B, bar C and bar D constitute the rhombus (left-half and right half part of rhombus
In former and later two planes), transition gear A and transition gear B is located in rhombus.
The body design of straight-line mechanism is a rhombus-mechanism by the present invention, and the mechanism is designed in isolator operation machine
In structure, become a part for isolator operating mechanism, the force piece of rhombus-mechanism is disconnecting switch drive shaft, when clockwise or
During rotate counterclockwise disconnecting switch drive shaft, power and motion can be passed to by rhombus-mechanism by series of gears transmission, made
The linear motion point for obtaining rhombus-mechanism makees upper and lower motion, so as to drive fuse grounding shaft open or closed with lower electric conductor.
The linear motion of contact is normally obtained, there can be many transmission schemes to realize.But due to disconnecting switch spring
Closely, it is very little to leave our spaces of design for, therefore the present invention is using by straight-line mechanism for structure inside operating mechanism
It is designed as rhombus-mechanism and in incorporating spring operating mechanism being grounded the linear motion of axle.
The feasibility of the present invention is analyzed below by the operation principle of rhombus-mechanism further.
As shown in figure 5, the driving shaft that O is mechanism that sets up an office, AO is the connecting rod being enclosed within axle, and AB is the connecting rod being hinged with AO.
When two levers are rotated opposite to each other, angle α and θ increase, and β reduces, and point B declines along the median perpendicular of mechanism.Take one group of mechanism OAB
See, it plays slide block and guide rail to it equivalent to one group of rocking bar-slide block mechanism, another group relative with it.Actually this
Liang Zu identicals mechanism is conditional.Consider
α=θ
So y=2lcos α (1)
DH=-dy=2lsin α d α
Stroke
Work as α1=72 °, α2=44 °, during l=153mm, H=125.55mm.α can be in 44 °～76 ° of anaplasia in theory
Change, work as α1During 76 ° of ＞, l will be interfered with disconnecting switch drive shaft, work as α2During 44 ° of ＜, the axle with transition gear dry by l occurs
Relate to.Affect in view of foozle and gap etc., α is preferably no more than 72 °.
As can be seen here, the scope of the appropriate length and angle for choosing connecting rod, can just design the straight-line mechanism for meeting stroke.
The value of the length and angle of connecting rod should be not interfere as principle with the parts in isolating switch mechanism.
Above-mentioned two AO connecting rods are equivalent to the bar A in the present invention and bar B, and two AB connecting rods are equivalent to the bar C in the present invention
With bar D.
The present invention is by being rhombus-mechanism by the body design of straight-line mechanism, and is incorporated isolator operating mechanism
In, can in the case where the other structures of existing solid insulation ring main unit are not changed, make under grounding shaft and fuse earth terminal it
Between apart from H >=125mm, so as to can the oil-insulated problem of effectively solving, it is ensured that the safety of equipment operation.
Description of the drawings
Overall construction drawings of the Fig. 1 for solid insulation ring main unit.
Fig. 2 is structural representation of the fuse in ground state.
Fig. 3 is structural representation of the fuse in ground connection off-state.
Fig. 4 is the structural representation of existing solid insulation ring main unit straight-line mechanism part.
Principle sketch of the Fig. 5 for rhombus-mechanism.
Fig. 6 is the assembling structure left view schematic diagram of rhombus-mechanism part of the present invention.
Fig. 7 is the assembling structure schematic front view of rhombus-mechanism part of the present invention.
Fig. 8 is the structural representation that fuse is grounded operation.
In Fig. 1：1-transmission case, 2-load switch body, 3-frame, 4-fuse, 5-disconnecting switch of assembly
Operating mechanism
In Fig. 2, Fig. 3：1-upper fingertip, 2-upper electric conductor 3-melt, 4-lower fingertip, 5-lower electric conductor, 6-ground connection
7-secondary cylinder of axle
In Fig. 4：1-isolator operating mechanism, 2-grounding shaft, 3-in-house 4-connecting lever of parts
In Fig. 6, Fig. 7, Fig. 8：1-disconnecting switch drive shaft 2-driven gear A 3-driving gear, 4-driven gear B
5-transition gear A 6-transition gear B 7-bar A 8-bar B 9-bar C 10-bar D, 11-intermediate members, 12-ground connection
Axle
Specific embodiment
As shown in Fig. 6, Fig. 7, Fig. 8, the present invention includes disconnecting switch drive shaft 1, driven gear A2, driving gear 3, passive
Gear B 4, transition gear A5, transition gear B6, bar A7, bar B8, bar C9 and bar C10, driving gear 3 is fixedly mounted on keeps apart
Close drive shaft 1 on, driven gear A2 is engaged with driving gear 3 and transition gear A5 simultaneously, transition gear B6 and meanwhile with transition tooth
Wheel A5 and driven gear B4 engagements, have been respectively fixedly connected with bar A7 and bar B8, bar A7 on driven gear A2 and driven gear B4
Be hinged with one end of bar 9C and bar D10 with the external part of bar B8 respectively, the other end of bar C9 and bar D10 it is hinged and while
It is connected with the upper end of intermediate member 11, the lower end of intermediate member 11 is connected with three-phase ground axle 12；The bar A7, bar B8, bar C9
Rhombus (see in view for rhombus, actual bar A7, bar C9 and bar B8, bar D10 are on former and later two faces), mistake are constituted with bar D10
Cross in the range of gear A 5 and transition gear B6 surrounded positioned at rhombus.When the bar A7 and bar B8 swing upwards into extreme position not
Can interfere with the drive shaft of disconnecting switch, can not be with transition gear A5 and transition gear B6 when swinging to downwards extreme position
Axle interfere.
The present invention the course of work be：When disconnecting switch drive shaft 1 is rotated, driving gear 3 is rotated, and drives passive tooth
Wheel A2 is rotated, and driven gear A2 will be moved and be passed to transition gear A5, transition gear B6 and driven gear B4 successively, due to passive
Gear A 2 and driven gear B4 are identical gear, therefore when disconnecting switch drive shaft 1 is made counterclockwise or rotated clockwise, bar
A7 and bar B8 makees towards or away from swing, so that the tie point P of bar C9 and bar D10 makees linear motion downward or upward,
When point P is moved downward, under the insertion fuse of grounding shaft 12 in electric conductor, lower electric conductor reliable ground；And when point P is moved upwards
When, the lower electric conductor of the disengaging of grounding shaft 12, and the fracture of H >=125mm is formed between grounding shaft 12 and lower electric conductor, can meet disconnected
The requirement insulated between mouthful.
In the present embodiment, if the length of bar A7, bar B8, bar 9C and bar D10 is 160mm, bar A7, and the initial swing of bar B8
Angle is 44 °, and in the lower electric conductor of the now insertion of grounding shaft 12, as bar A7, and the pendulum angle of bar B8 is when being 72 °, grounding shaft 12
The distance for moving up is entirely capable of meeting the requirement insulated between fracture up to 131mm.
The above is only preferably specific embodiment of the invention, but protection scope of the present invention is not limited thereto,
The guarantor in the present invention should be all covered in any transformation carried out based on technical scheme provided by the present invention and inventive concept and replacement
In the range of shield.
Claims (1)
1. a kind of isolator operating mechanism of solid insulation ring main unit, including disconnecting switch drive shaft, driving gear, passive tooth
Wheel A, driven gear B, transition gear A and transition gear B, driving gear are fixedly mounted in disconnecting switch drive shaft, passive tooth
Wheel A is engaged with driving gear and transition gear A simultaneously, and transition gear B is engaged with transition gear A and driven gear B simultaneously, and which is special
Levy and be：Bar A is fixedly connected with driven gear A, the external part difference of bar B, bar A and bar B on driven gear B, is fixedly connected with
It is hinged with one end of bar C and bar D, the other end of bar C and bar D is hinged and while be connected with the upper end of intermediate member, in
Between the lower end of component be connected with three-phase ground axle；The bar A, bar B, bar C and bar D constitute rhombus, transition gear A and transition gear
B is located in rhombus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339153.3A CN104882307B (en) | 2015-06-17 | 2015-06-17 | A kind of isolator operating mechanism of solid insulation ring main unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339153.3A CN104882307B (en) | 2015-06-17 | 2015-06-17 | A kind of isolator operating mechanism of solid insulation ring main unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104882307A CN104882307A (en) | 2015-09-02 |
| CN104882307B true CN104882307B (en) | 2017-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510339153.3A Active CN104882307B (en) | 2015-06-17 | 2015-06-17 | A kind of isolator operating mechanism of solid insulation ring main unit |
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| CN (1) | CN104882307B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106206108B (en) * | 2016-08-31 | 2018-11-13 | 张力 | A kind of direct-operated isolating switch operating mechanism |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8705885D0 (en) * | 1987-03-12 | 1987-04-15 | Y S Securities Ltd | Electrical switchgear |
| CN102780171B (en) * | 2012-07-30 | 2015-04-08 | 日升集团有限公司 | Small-sized vacuum ring main unit |
| CN204732310U (en) * | 2015-06-17 | 2015-10-28 | 成都民达电力设备有限公司 | A kind of isolator operating mechanism of solid insulation ring main unit |
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2015
- 2015-06-17 CN CN201510339153.3A patent/CN104882307B/en active Active
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| Publication number | Publication date |
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| CN104882307A (en) | 2015-09-02 |
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