CN219759439U - Double-break isolation grounding switch - Google Patents
Double-break isolation grounding switch Download PDFInfo
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- CN219759439U CN219759439U CN202320539184.3U CN202320539184U CN219759439U CN 219759439 U CN219759439 U CN 219759439U CN 202320539184 U CN202320539184 U CN 202320539184U CN 219759439 U CN219759439 U CN 219759439U
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- seat
- break
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- 238000002955 isolation Methods 0.000 title claims description 40
- 230000007246 mechanism Effects 0.000 abstract description 12
- 230000003068 static effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Abstract
The utility model discloses a double-break isolating grounding switch, which can complete the switching-on of a disconnecting switch and a grounding switch by only one step of operation, so that the switch is reliably grounded, compared with the two-step operation of separating and then switching-on and grounding the existing disconnecting switch, the safety is higher, the disconnecting switch and the grounding switch in the existing scheme are separately operated, and only one mechanism is needed.
Description
Technical Field
The utility model relates to the field of power equipment, in particular to a double-break isolation grounding switch.
Background
The gas-insulated metal-enclosed switchgear (GIS) has the advantages of small occupied area, low operation failure rate, high reliability, no maintenance and the like, and is widely applied to power grid construction. In a typical design of a transformer substation, an isolation fracture is not formed between the spare extension GIS equipment and the operation equipment or only one isolation fracture exists, power failure treatment is required to be performed on the operation bus when the spare equipment extension installation and the handover withstand voltage test are performed, and the labor and material resources and the like brought by the original electrified equipment can be disassembled when the withstand voltage is abnormal, so that huge economic loss can be caused by the power failure. The double-break isolating switch can perfectly solve the technical problem that multiple power failures are required in GIS interval extension and handover withstand voltage tests of the transformer substation.
The utility model discloses a double-break isolating switch for GIS as in China patent with publication number of CN218215116U, which comprises a shell, a movable contact seat assembly and two static contact seat assemblies, wherein the static contact seat assemblies are connected with the shell through basin-type insulators, the movable contact seat assemblies comprise a center seat and two contact seats fixedly connected on the center seat, the center seat is fixedly connected with the shell through a supporting insulation table, movable contacts matched with the two static contact seat assemblies are respectively connected in a sliding manner in the two contact seats, ball screws are connected in the contact seats in an axial manner, nuts of the ball screws are fixedly connected with the movable contacts, an insulation rod connected with an operating mechanism is connected on the center seat in a shaft manner, and the insulation rod drives the two ball screws to synchronously rotate through a gear assembly; the double-break isolating switch can perfectly solve the technical problem that multiple power failures are required during GIS interval extension and handover withstand voltage test of a transformer substation.
Another example is chinese patent publication No. CN114709102a, which discloses a GIS double-break isolating switch, including a housing, an operating mechanism and a driving mechanism, where a sealed chamber is formed in the housing, and an isolating device is provided in the sealed chamber, where the isolating device includes a secondary moving contact seat, a driving contact seat, an isolating static contact seat and a moving contact assembly, and the isolating device includes a first isolating break and a second isolating break, and the moving contact assembly includes an insulating pull rod, a driving contact and a secondary moving contact, and when the moving contact assembly moves forward or backward along a straight line, the driving contact and the secondary moving contact synchronously move to make the first isolating break and the second isolating break turned on or off; the sealing chamber is provided with a grounding device, the grounding device comprises a grounding moving contact and a grounding static contact seat, the grounding static contact seat is correspondingly arranged on an active contact seat, and one end of the sealing chamber is provided with an expansion port. The isolating device provided by the utility model has the insulation guarantee of two isolating fracture, and the grounding device can realize uninterrupted butt joint and reliable grounding during bus extension.
In summary, the design of the existing double-break isolating switch needs to perform grounding operation on the moving contact assembly after opening before overhauling, so that the electric shock danger caused by residual charges of the moving contact assembly in the overhauling process is prevented, but the grounding switch is not closed due to incorrect operation during overhauling, and the risk of hurting people is easily caused by the residual charges of the isolating switch.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a double-break isolation grounding switch to solve the problems.
In order to achieve the above object, the present utility model is achieved by the following technical scheme.
The utility model provides a double-break isolation earthing switch, includes isolation switch first switch-on seat, isolation switch first moving contact, isolation switch first connecting rod, intermediate seat, bent axle, earthing switch connecting rod, earthing switch moving contact, earthing switch earthing seat, isolation switch second switch-on seat, isolation switch second connecting rod, isolation switch second moving contact, the inside cover of intermediate seat is equipped with isolation switch first moving contact, isolation switch second moving contact, earthing switch moving contact, isolation switch first moving contact is articulated with the bent axle through isolation switch first connecting rod, isolation switch second moving contact is articulated with the bent axle through isolation switch second connecting rod, the earthing switch moving contact only needs one step of operation to accomplish isolation switch separating brake and earthing switch closing through earthing switch connecting rod and bent axle hinge switch, makes the switch reliable ground, separates earlier than current isolation switch and closes two steps of operation of earthing switch, and the security is higher, and current scheme isolation switch and earthing switch separate operation just need two mechanisms, and this scheme only needs one mechanism, reduces the cost.
Preferably, the first switch-on seat of the isolating switch, the grounding seat of the grounding switch and the second switch-on seat of the isolating switch are respectively arranged relative to the first moving contact of the isolating switch, the moving contact of the grounding switch and the second moving contact of the isolating switch.
Preferably, the crankshaft comprises a front end shaft, a first crank, a first connecting rod journal, a first elbow crank, a second connecting rod journal, a second crank, a rear end shaft and a third elbow crank, and the transmission mode of the crankshaft is applied to the double-break isolation grounding switch, so that when the switch is switched in the on-off state, the main shaft only needs to rotate for half a circle, the mechanism design is simple and reliable, the main shaft needs to rotate for tens of circles in a screw rod or gear structure used by the traditional double-break switch, the matched mechanism is relatively complex, the transmission mode of the crankshaft enables the contact to be fast switched in and out, the speed conditions of switching in and switching off the load are provided, the arc resistance is improved, the safety is further improved, and the contact can only move slowly in the transmission structure of the existing scheme.
Preferably, the front end shaft and the rear end shaft are sleeved with an intermediate seat bearing sleeve which can freely rotate.
Preferably, the front end shaft is fixedly connected with the first crank.
Preferably, the first crank is pinned to the first elbow crank by a first connecting rod journal, and the disconnecting switch first link is hinged to the crank by the first connecting rod journal.
Preferably, the first and second elbow cranks are pinned by a second connecting rod journal.
Preferably, the second crank is pinned to the second elbow crank by a third connecting rod journal, and the disconnecting switch second connecting rod is hinged to the crank by the second connecting rod journal.
Preferably, the rear end shaft is connected to a second crank.
Preferably, the first elbow-shaped crank overlaps one side of the second elbow-shaped crank and the other side is positioned at two sides when the crankshaft is axially seen.
Compared with the prior art, the utility model discloses a double-break isolation grounding switch which comprises a plurality of parts which are mutually combined to play a role,
(1) the disconnecting switch and the grounding switch can be switched on by only one step of operation, so that the switch is reliably grounded, the safety is higher compared with the two-step operation that the existing disconnecting switch is separated and then grounded, and the disconnecting switch and the grounding switch are separately operated by the existing scheme, so that two mechanisms are needed, only one mechanism is needed by the scheme, and the cost is reduced;
(2) the transmission mode of the crankshaft is applied to the double-break isolation grounding switch, so that when the switch is switched in the on-off state, the main shaft only needs to rotate for half a circle, the mechanism design is simple and reliable, the screw rod or the gear structure used by the traditional double-break isolation switch is used, the main shaft needs to rotate for tens of circles, and the matched mechanism is relatively complex;
(3) the transmission mode of the crankshaft enables the contact to be quickly opened and closed, has the speed condition of closing and opening the load, improves the arc resistance, and the switch has the capacity of closing and opening a certain load (residual charge), so that the safety is further improved.
Drawings
FIG. 1 is a schematic diagram of a switch-on state of a dual-break isolated grounding switch according to the present utility model;
FIG. 2 is a schematic diagram of a dual-break isolated grounding switch according to the present utility model;
FIG. 3 is a schematic view of the structure of the crankshaft of the present utility model;
FIG. 4 is a schematic view of the structure of the crankshaft of the present utility model;
FIG. 5 is a schematic structural diagram of embodiment 2 of the present utility model;
fig. 6 is a schematic structural diagram of embodiment 2 of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
The utility model provides a double-break isolation grounding switch, includes isolation switch first switch-on seat 11, isolation switch first moving contact 12, isolation switch first connecting rod 13, intermediate seat 2, bent axle 3, grounding switch connecting rod 41, grounding switch moving contact 42, grounding switch grounding seat 43, isolation switch second switch-on seat 51, isolation switch second connecting rod 52, isolation switch second moving contact 53, the inside cover of intermediate seat 2 is equipped with isolation switch first moving contact 12, isolation switch second moving contact 53, grounding switch moving contact 42, isolation switch first moving contact 12 is articulated with bent axle 3 through isolation switch first connecting rod 13, isolation switch second moving contact 53 is articulated with bent axle 3 through isolation switch second connecting rod 52, grounding switch moving contact 42 is articulated with bent axle 3 through grounding switch connecting rod 41.
The first closing seat 11, the grounding seat 43 and the second closing seat 51 are respectively arranged relative to the first moving contact 12, the grounding contact 42 and the second moving contact 53.
The crankshaft 3 includes a front end shaft 31, a first crank 32, a first connecting rod journal 33, a first elbow crank 34, a second elbow crank 35, a second connecting rod journal 36, a second crank 37, a rear end shaft 38, and a third elbow crank 39.
The front end shaft 31 and the rear end shaft 38 are sleeved with a bearing sleeve of the middle seat 2, and the two bearing sleeves can freely rotate.
The front end shaft 31 is fixedly connected with a first crank 32.
The first crank 32 is pinned to a first elbow crank 34 by a first connecting rod journal 33, and the disconnecting switch first connecting rod 13 is articulated to the crank by the first connecting rod journal 33.
The first toggle crank 34 is pinned to the second toggle crank 35 by a second connecting rod journal 36.
The second crank 37 is pinned to the second elbow crank 35 by a third connecting rod journal and the disconnecting switch second connecting rod 52 is hinged to the crank by a second connecting rod journal 36.
The rear end shaft 38 is connected to the second crank 37.
The first elbow crank 34 overlaps the second elbow crank 35 at one side and at the other side as seen in the axial direction of the crankshaft 3.
As shown in fig. 1, the double-break isolated earthing switch is in a closed state: the isolating switch is in the closing position (the first moving contact 12 of the isolating switch is contacted with the first closing seat 11 of the isolating switch, the second moving contact 53 of the isolating switch is contacted with the second closing seat 51 of the isolating switch), the grounding switch is in the separating position (the moving contact 42 of the grounding switch is not contacted with the grounding seat 43 of the grounding switch),
at this time, the center points of the first moving contact 12, the first connecting rod 13, the crankshaft 3, the connecting rod 41, the moving contact 42, the second connecting rod 52 and the second moving contact 53 are coaxial. The disconnecting switch first link 13 and the disconnecting switch second link 52 do not overlap with the first crank 32 and the second crank 37, and the grounding switch link 41 is folded into the second elbow crank 35 to overlap. The crankshaft 3 rotates 180 degrees, and the switch can switch states.
As shown in fig. 2, the double-break isolated earthing switch is in an earthing state: the isolating switch is in the separated position (the isolating switch first moving contact 12 is not contacted with the isolating switch first closing seat 11, the isolating switch second moving contact 53 is not contacted with the isolating switch second closing seat 51), and the grounding switch is in the combined position (the grounding switch moving contact 42 is not contacted with the grounding switch grounding seat 43), at this time, the central points of the isolating switch first moving contact 12, the isolating switch first connecting rod 13, the crankshaft 3, the grounding switch connecting rod 41, the grounding switch moving contact 42, the isolating switch second connecting rod 52 and the isolating switch second moving contact 53 are coaxial. The disconnecting switch first link 13 and the disconnecting switch second link 52 are folded into the first crank 32 and the second crank 37 to overlap, and the grounding switch link 41 is not overlapped with the second elbow crank 35.
Example 2
Based on the condition that the technical characteristics are unchanged, the angle between the switches can be flexibly designed, and different interface requirements are met.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (9)
1. The utility model provides a double-break isolation earthing switch which characterized in that: including isolator first switch-on seat (11), isolator first movable contact (12), isolator first connecting rod (13), intermediate seat (2), bent axle (3), earthing switch connecting rod (41), earthing switch movable contact (42), earthing switch earthing seat (43), isolator second switch-on seat (51), isolator second connecting rod (52), isolator second movable contact (53), intermediate seat (2) inside cover is equipped with isolator first movable contact (12), isolator second movable contact (53), earthing switch movable contact (42), isolator first movable contact (12) are articulated with bent axle (3) through isolator first connecting rod (13), isolator second movable contact (53) are articulated with bent axle (3) through isolator second connecting rod (52), earthing switch movable contact (42) are articulated with bent axle (3) through earthing switch connecting rod (41).
2. The dual-break isolated ground switch of claim 1, wherein: the isolating switch first closing seat (11), the grounding switch grounding seat (43) and the isolating switch second closing seat (51) are respectively arranged relative to the isolating switch first moving contact (12), the grounding switch moving contact (42) and the isolating switch second moving contact (53).
3. The dual-break isolated ground switch of claim 1, wherein: the crankshaft (3) comprises a front end shaft (31), a first crank (32), a first connecting rod journal (33), a first elbow crank (34), a second elbow crank (35), a second connecting rod journal (36), a second crank (37), a rear end shaft (38) and a third elbow crank (39).
4. A dual-break isolated ground switch as defined in claim 3, wherein: the front end shaft (31) and the rear end shaft (38) are sleeved with a middle seat (2) bearing sleeve which can freely rotate.
5. The dual-break isolated grounding switch of claim 4, wherein: the front end shaft (31) is fixedly connected with the first crank (32).
6. The dual-break isolated grounding switch of claim 5, wherein: the first crank (32) is in pin joint with the first elbow-shaped crank (34) through a first connecting rod shaft neck (33), and the disconnecting switch first connecting rod (13) is hinged with the crank through the first connecting rod shaft neck (33).
7. The dual-break isolated grounding switch of claim 6, wherein: the first toggle crank (34) is pinned to the second toggle crank (35) by a second connecting rod journal (36).
8. The dual-break isolated grounding switch of claim 7, wherein: the rear end shaft (38) is connected to a second crank (37).
9. The dual-break isolated grounding switch of claim 8, wherein: the first elbow-shaped crank (34) and the second elbow-shaped crank (35) overlap on one side and on the other side when seen in the axial direction of the crankshaft (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320539184.3U CN219759439U (en) | 2023-03-20 | 2023-03-20 | Double-break isolation grounding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320539184.3U CN219759439U (en) | 2023-03-20 | 2023-03-20 | Double-break isolation grounding switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219759439U true CN219759439U (en) | 2023-09-26 |
Family
ID=88092651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320539184.3U Active CN219759439U (en) | 2023-03-20 | 2023-03-20 | Double-break isolation grounding switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219759439U (en) |
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2023
- 2023-03-20 CN CN202320539184.3U patent/CN219759439U/en active Active
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