CN102804295A - Moving contact for oil-immersed load switch - Google Patents
Moving contact for oil-immersed load switch Download PDFInfo
- Publication number
- CN102804295A CN102804295A CN2010800608888A CN201080060888A CN102804295A CN 102804295 A CN102804295 A CN 102804295A CN 2010800608888 A CN2010800608888 A CN 2010800608888A CN 201080060888 A CN201080060888 A CN 201080060888A CN 102804295 A CN102804295 A CN 102804295A
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- Prior art keywords
- contact
- plate
- head plate
- contact plate
- oil
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- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/42—Knife-and-clip contacts
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Abstract
A moving contact for an oil-immersed load switch comprises an upper contact plate (202), a lower contact plate (204), an upper leaf spring (302) and a lower leaf spring (304). The upper contact plate is opposite to the lower contact plate and has the same shape with the lower contact plate. Each contact plate has a middle section, two grip sections and two transition sections which connect the middle section and the two grip sections, and the two grip sections are at the two sides of the middle section. The gap between the middle sections of the upper and lower contact plates is smaller than the gap between the grip sections of the upper and lower contact plates. Each leaf spring has a flat center portion and two curved clamp portions. The two clamp portions are at the two sides of the center portion. Each clamp portion expands outwards first and then shrinks inwards in the direction from middle to edge. The clamp portions of the leaf spring contact the grip sections of the contact plate. Elastic forces are applied to the grip sections by the clamp portions and make the grip sections of the upper and lower contact plates close inwards, and pressure forces produced by the deformations of the contact plates and the leaf springs cause the moving contact to contact with a static contact. The pressure forces between the moving contact and the static contact are balanceable when the switch is switched on. The currents are divided equally into two parts and carried respectively by the upper and lower contact plates.
Description
Oil-immersed load switch moving contact technical field
The present invention relates to equipment for power transmission and distribution field, more specifically to a kind of oil-immersed load switch moving contact.Background technology
Oil-immersed load switch is common components in American Unit Substation in high voltage power distribution field.In order to realize the purpose for switching high current-carrying, the moving contact of oil-immersed load switch is realized using following structure in the prior art.
With reference to shown in Fig. 1, the oil-immersed load switch moving contact includes two panels contact plate 101 and 102, the two panels contact plate 101 and 102 is tabular, the through hole being aligned with each other is provided with contact plate 101 and 102, spring members 104 are set through through hole, the spring members 104 include the center rod and the spring 106 being enclosed in center rod through through hole.By compression spring 106, contact plate 101 is pressed to contact plate 102 by the spring force that spring 106 is produced.There is clamping projection 108 at the two ends of two panels contact plate 101 and 102, clamping projection 108 is used for clamping static contact 1 10.Contact plate 101 and 102 is entirely derived from the spring force of spring 106 for the chucking power of static contact 1 10.
In order to realize the purpose of high current-carrying, more sturdy contact can be used, and because the contact pressure of this structure is entirely to be provided by the deformation of compression spring 106.The use of compression spring, which is reduced, reduces alternate effective insulation distance, also result in the increase of the size under identical voltage class, so that the appearance and size of oil-immersed load switch is bigger, so as to cause bigger with the equipment volume of oil-immersed load switch, cost is higher.The content of the invention
The present invention is intended to provide a kind of oil-immersed load switch moving contact with smaller size.
According to one embodiment of the invention, a kind of oil-immersed load switch moving contact is proposed, including：Contact plate, contact plate includes the upper contact head plate being of similar shape and lower contact plate, upper contact head plate and lower contact plate are oppositely arranged, each in upper contact head plate and lower contact plate has center section, retained part and the transition portion for connecting center section and retained part, and retained part is located at center section
Both sides, the gap of the center section of upper contact head plate and lower contact plate is less than the gap of upper contact head plate and the retained part of lower contact plate；
Spring leaf, spring leaf includes the upper spring leaf coordinated with upper contact head plate and the lower spring piece coordinated with lower contact plate, each in upper spring leaf and lower spring piece has flat middle body and the clamping part bent, the both sides of the centrally located part of clamping part, along from middle extrorse direction, clamping part is first flared out inwardly tightening up again, the clamping part of spring leaf is contacted with the retained part of contact plate, and the spring-force driven dual of clamping part makes upper contact head plate and the retained part of lower contact plate come closer in retained part；
Wherein contact plate and Spring deformation produce contact pressure so that contact pressure is mutually balanced when moving contact coordinates with static contact combined floodgate；
Contained electric current is divided into two parts, is carried by contact plate.
In one embodiment, upper contact head plate and lower contact plate are relatively fixed at together by a fixation kit, and have a spacer between upper contact head plate and lower contact plate, and spacer causes upper contact head plate and the center section of lower contact plate not to contact.Gap between upper contact head plate and lower contact plate is adjusted by adjusting the thickness of spacer.Upper spring leaf is fixed on the outside of upper contact head plate by fixation kit, and the middle section contacts of the middle body of upper spring leaf and upper contact head plate, lower spring piece is fixed on the outside of lower contact plate, and the middle body of lower spring piece and the middle section contacts of lower contact plate by fixation kit.Fixation kit is fastener, and fastener includes the hole that there is the confession screw being mutually aligned to pass through on bolt, nut or rivet, upper contact head plate, lower contact plate, upper spring leaf and lower spring piece.
In one embodiment, upper contact head plate and lower contact plate are relatively fixed at together by a fixation kit, and the center section of upper contact head plate and lower contact plate, which is floated, to be contacted.Upper spring leaf is fixed on the outside of upper contact head plate by fixation kit, and the middle body of upper spring leaf is not contacted with the center section of upper contact head plate, lower spring piece is fixed on the outside of lower contact plate by fixation kit, and the middle body of lower spring piece is not contacted with the center section of lower contact plate.Fixation kit is fastener, fastener include having on bolt, nut or rivet, upper contact head plate, lower contact plate, upper spring leaf and lower spring piece the confession that is mutually aligned through hole, hole is passed through for fastener.
In one embodiment, upper contact head plate and the retained part of lower contact plate have clamping projection, and clamping projection is used for clamping static contact.
The oil-immersed load switch moving contact of the present invention uses the deformation combination spring leaf of contact plate in itself
Deform to provide contact pressure.The size of spring leaf can be reduced, and obtain the gap between less contact plate.Contact sheet separation is smaller can effectively to improve the contact pressure in the case of failure using fault current, so as to improve the reliability of switch.The oil-immersed load switch moving contact longitudinal size of the present invention is smaller, and the assembling thickness direction size of traditional oil-immersed load switch moving contact is typically all not less than
30mm, and present invention meter is about 18mm.Thus oil-immersed load switch on the whole can be with the smaller of 4 events, and corresponding oil-filled transformer is so as to the smaller cost to reduce end user that can also be done.Brief description of the drawings
The above and other feature of the present utility model, property and advantage will be become readily apparent from by description with reference to the accompanying drawings and examples, in the accompanying drawings, and identical reference represents identical feature all the time, wherein：
Fig. 1 discloses the structure of oil-immersed load switch moving contact in the prior art.
Fig. 2 discloses the structure of the oil-immersed load switch moving contact according to one embodiment of the invention.Fig. 3 discloses the schematic diagram that the oil-immersed load switch moving contact of the embodiment shown in Fig. 2 coordinates with static contact.
Fig. 4 discloses the structure of oil-immersed load switch moving contact according to another embodiment of the present invention.Embodiment
The present invention forms contact pressure using the spring force of the elastic force combination spring leaf of contact plate self-deformation generation, the electric power that high current is produced simultaneously improves contact pressure, so that for spring force under high current in the case of dependence reduce, reduce the size of spring to realize the diminutions of overall dimensions.
With reference to shown in Fig. 2, Fig. 2 discloses the structure of the oil-immersed load switch moving contact according to one embodiment of the invention, and the oil-immersed load switch moving contact 200 includes：Contact plate, spring leaf and fixation kit.
Contact plate includes the upper contact head plate 202 being of similar shape and lower contact plate 204, upper contact head plate 202 and lower contact plate 204 are oppositely arranged, and each in upper contact head plate 202 and lower contact plate 204 has center section 202a and 204a, retained part 202b and 204b and connection center section and retained part transition portion 202c and 204c.Retained part 202b and 204b are located at centre
Part 202a and 204a both sides.Gap between upper contact head plate 202 and the center section 202a and 204a of lower contact plate 204 is less than the gap between upper contact head plate 202 and the retained part 202b and 204b of lower contact plate 204.
Spring leaf includes the upper spring leaf 302 coordinated with upper contact head plate 202 and the lower spring piece 304 coordinated with lower contact plate 204, and each in upper spring leaf 302 and lower spring piece 304 has flat middle body 302a and 304a and the clamping part 302b and 304b of bending.The centrally located part 302a and 304a of clamping part clamping part 302b and 304b both sides.Along from middle extrorse direction, clamping part clamping part 302b and 304b are first flared out inwardly tightening up again, the clamping part of spring leaf is contacted with the retained part of contact plate, and clamping part 302b and 304b spring-force driven dual make the retained part 202b and 204b of upper contact head plate and lower contact plate come closer in retained part 202b and 204b.
Contact plate and Spring deformation produce contact pressure so that contact pressure is mutually balanced when moving contact coordinates with static contact combined floodgate, and contained electric current is divided into two parts, is carried by contact plate.
Upper contact head plate 202 and lower contact plate 204 are relatively fixed at together by fixation kit 400, in the embodiment shown in fig. 1, there is a spacer 402 between upper contact head plate 202 and lower contact plate 204, spacer 402 causes the center section of upper contact head plate and lower contact plate not contact, and leaves a gap.Meanwhile, gap between upper contact head plate and lower contact plate can be by adjusting the thickness of spacer 402（Such as using the spacer with different-thickness）And adjusted.Fixation kit 400 is the hole that there is the confession screw being mutually aligned to pass through on screw and nut or equivalent fastenings such as rivet etc., upper contact head plate 202, lower contact plate 204, upper spring leaf 302 and lower spring piece 304.Upper contact head plate 202, lower contact plate 204, upper spring leaf 302 and lower spring piece 304 are fixed together by screw and nut or equivalent fastenings such as rivet etc. through this some holes.
With continued reference to Fig. 1, upper spring leaf 302 is fixed on the outside of upper contact head plate 202 by fixation kit 400 in the embodiment, and the middle body 302a of upper spring leaf 302 is contacted with the center section 202a of upper contact head plate 202.Lower spring piece 304 is fixed on the outside of lower contact plate 204 by fixation kit 400, and the middle body 304a of lower spring piece 304 is contacted with the center section 204a of lower contact plate 204.
There is clamping projection 206 in upper contact head plate 202 and the retained part 202b and 204b of lower contact plate 204 end, clamping projection 206 is used for clamping static contact.
Fig. 3 discloses the schematic diagram that the oil-immersed load switch moving contact of the embodiment shown in Fig. 2 coordinates with static contact.As shown in figure 3, when coordinating with static contact 500, the retained part 202b and 204b of upper contact head plate 202 and lower contact plate 204 clamping static contact 500 of clamping projection 206.Because static contact 500 has certain thickness, hence in so that upper contact head plate 202 and lower contact plate 204 and upper spring leaf 302 and lower spring piece 304 all there occurs deformation, then, the elastic force and the spring force of spring leaf that contact plate self-deformation is produced are collectively forming contact pressure, and upper contact head plate 202 and lower contact plate 204 are compressed towards the direction drawn close.
Contact pressure in the embodiment is provided by contact plate and spring leaf commonly through deformation, the regulation of pressure can easily be realized by the gap adjusted between contact plate, gap in the center section of contact plate is smaller, and electric power that the design can be produced more effectively using fault current increases stability.The design of the embodiment can allow to design smaller and less expensive switch and transformer.
Fig. 4 discloses the structure of oil-immersed load switch moving contact according to another embodiment of the present invention.The oil-immersed load switch moving contact 200 includes：Contact plate, spring leaf and fixation kit.
Contact plate includes the upper contact head plate 202 being of similar shape and lower contact plate 204, upper contact head plate 202 and lower contact plate 204 are oppositely arranged, and each in upper contact head plate 202 and lower contact plate 204 has center section 202a and 204a, retained part 202b and 204b and connection center section and retained part transition portion 202c and 204c.Retained part 202b and 204b are located at center section 202a and 204a both sides.Float and contact between upper contact head plate 202 and the center section 202a and 204a of lower contact plate 204, very close to each other, it is understood that to be, the gap between the center section 202a and 204a of upper contact head plate 202 and lower contact plate 204（It is zero）Less than the gap between retained part 202b and 204b.
Spring leaf includes the upper spring leaf 302 coordinated with upper contact head plate 202 and the lower spring piece 304 coordinated with lower contact plate 204, and each in upper spring leaf 302 and lower spring piece 304 has flat middle body 302a and 304a and the clamping part 302b and 304b of bending.The centrally located part 302a and 304a of clamping part clamping part 302b and 304b both sides.Along from middle extrorse direction, clamping part clamping part 302b and 304b are first flared out inwardly tightening up again, the clamping part of spring leaf is contacted with the retained part of contact plate, and clamping part 302b and 304b spring-force driven dual make the retained part 202b and 204b of upper contact head plate and lower contact plate come closer in retained part 202b and 204b.
Upper contact head plate 202 and lower contact plate 204 are relatively fixed at together by fixation kit 400, in the embodiment shown in fig. 4, float and contact between upper contact head plate 202 and lower contact plate 204, the center section 202a and 204a of upper contact head plate 202 and lower contact plate 204 are not contacted.Fixation kit 400 is the hole that there is the confession screw being mutually aligned to pass through on screw and nut, upper contact head plate 202, lower contact plate 204, upper spring leaf 302 and lower spring piece 304.Upper contact head plate 202, lower contact plate 204, upper spring leaf 302 and lower spring piece 304 are fixed together by screw and nut through this some holes.
With continued reference to Fig. 4, upper spring leaf 302 is fixed on the outside of upper contact head plate 202 by fixation kit 400 in the embodiment, and the middle body 302a of upper spring leaf 302 is not contacted with the center section 202a of upper contact head plate 202.Lower spring piece 304 is fixed on the outside of lower contact plate 204 by fixation kit 400, and the middle body 304a of lower spring piece 304 is not contacted with the center section 204a of lower contact plate 204.
There is clamping projection 206 in upper contact head plate 202 and the retained part 202b and 204b of lower contact plate 204 end, clamping projection 206 is used for clamping static contact.
In the embodiment shown in fig. 4, between upper contact head plate 202 and lower contact plate 204 it is contact of floating, therefore the contact pressure of the overwhelming majority will be provided by spring leaf.In this embodiment, the material of spring leaf can be spring steel or similar material, compared with copper, and spring steel is in carrying high current (such as fault current）When will more stablize.Because the high temperature that fault current is produced can soften copper, so as to greatly reduce the elasticity and contact pressure of spring leaf.
The oil-immersed load switch moving contact of the present invention can be assemblied in the high-tension apparatuses such as all kinds of on-load switches, earthed switch and disconnecting switch, connection, disconnection or ground connection for high-tension apparatus loop.In the American Unit Substation or switchgear that can be used for the FR3 transformer oil filled with mineral transformer oil or environmental protection using the two station loads of the present invention.The operating mechanism of switch is Manual spring energy storage centering spring mechanism, and switch division speed is not influenceed by artificial service speed.Spring mechanism can complete load in a cycle and cut-off or close operation.It is panel-mounted or ring-like Fast Installation panel-mounted including bolt installing type panel-mounted, welding support that two station load switchs, which include the operation axle sealing system with double 0 type sealing rings and 3 kinds of optional mounting means installation panels,.What switching mechanism was included built-in spacing makes switch to have two positions.Switching manipulation is hot stick rotation process.
The deformation of deformation combination spring leaf of the oil-immersed load switch moving contact using contact plate of the present invention in itself provides contact pressure.The size of spring leaf can be reduced, and obtain less contact plate it
Between gap.Contact sheet separation is smaller can effectively to improve the contact pressure in the case of failure using fault current, so as to improve the reliability of switch.The oil-immersed load switch moving contact longitudinal size of the present invention is smaller, and the assembling thickness direction size of traditional oil-immersed load switch moving contact is typically all not less than
30mm, and present invention meter is about 18mm.Thus oil-immersed load switch on the whole can be with the smaller of 4 events, and corresponding oil-filled transformer is so as to the smaller cost to reduce end user that can also be done.
Above-described embodiment, which is available to, to be familiar with person in the art to realize or using of the present utility model; those skilled in the art can be in the case where not departing from utility model thought of the present utility model; various modifications or change are made to above-described embodiment; thus protection domain of the present utility model is not limited by above-described embodiment, and should be the maximum magnitude for meeting the inventive features that claims are mentioned.
Claims (1)
- Claim1. a kind of oil-immersed load switch moving contact, it is characterised in that including：Contact plate, contact plate includes the upper contact head plate being of similar shape and lower contact plate, upper contact head plate and lower contact plate are oppositely arranged, each in upper contact head plate and lower contact plate has center section, retained part and the transition portion for connecting center section and retained part, retained part is located at the both sides of center section, and the gap of the center section of upper contact head plate and lower contact plate is less than the gap of upper contact head plate and the retained part of lower contact plate；Spring leaf, spring leaf includes the upper spring leaf coordinated with upper contact head plate and the lower spring piece coordinated with lower contact plate, each in upper spring leaf and lower spring piece has flat middle body and the clamping part bent, the both sides of the centrally located part of clamping part, along from middle extrorse direction, clamping part is first flared out inwardly tightening up again, the clamping part of spring leaf is contacted with the retained part of contact plate, and the spring-force driven dual of clamping part makes upper contact head plate and the retained part of lower contact plate come closer in retained part；Wherein described contact plate and Spring deformation produce contact pressure so that contact pressure is mutually balanced when moving contact coordinates with static contact combined floodgate；Contained electric current is divided into two parts, is carried by the contact plate.2. the oil-immersed load switch moving contact as described in claim 1, it is characterized in that, upper contact head plate and lower contact plate are relatively fixed at together by one fixation kit, and there is a spacer between upper contact head plate and lower contact plate, spacer causes upper contact head plate and the center section of lower contact plate not to contact.3. the oil-immersed load switch moving contact as described in claim 1, it is characterised in that the gap between upper contact head plate and lower contact plate is adjusted by adjusting the thickness of spacer.4. oil-immersed load switch moving contact as claimed in claim 2, it is characterised in that upper spring leaf is fixed on the outside of upper contact head plate, and the middle section contacts of the middle body and upper contact head plate of upper spring leaf by the fixation kit, Lower spring piece is fixed on the outside of lower contact plate, and the middle body of lower spring piece and the middle section contacts of lower contact plate by the fixation kit.5. oil-immersed load switch moving contact as claimed in claim 4, it is characterized in that, the fixation kit is fastener, the fastener includes the hole that there is the confession screw being mutually aligned to pass through on bolt, nut or rivet, the upper contact head plate, lower contact plate, upper spring leaf and lower spring piece.6. the oil-immersed load switch moving contact as described in claim 1, it is characterised in that upper contact head plate and lower contact plate are relatively fixed at together by a fixation kit, the center section of upper contact head plate and lower contact plate, which is floated, to be contacted.7. oil-immersed load switch moving contact as claimed in claim 6, it is characterised in that upper spring leaf is fixed on the outside of upper contact head plate by the fixation kit, and the middle body of upper spring leaf is not contacted with the center section of upper contact head plate,Lower spring piece is fixed on the outside of lower contact plate by the fixation kit, and the middle body of lower spring piece is not contacted with the center section of lower contact plate.8. oil-immersed load switch moving contact as claimed in claim 7, it is characterized in that, the fixation kit is fastener, the fastener includes bolt, nut or rivet, have on the upper contact head plate, lower contact plate, upper spring leaf and lower spring piece the confession that is mutually aligned through hole, the hole is passed through for fastener.9. the oil-immersed load switch moving contact as described in claim 1, it is characterised in that upper contact head plate and the retained part of lower contact plate have clamping projection, clamping projection is used for clamping static contact.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2010/070061 WO2011082528A1 (en) | 2010-01-08 | 2010-01-08 | Moving contact for oil-immersed load switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102804295A true CN102804295A (en) | 2012-11-28 |
Family
ID=44305170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800608888A Pending CN102804295A (en) | 2010-01-08 | 2010-01-08 | Moving contact for oil-immersed load switch |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102804295A (en) |
| WO (1) | WO2011082528A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511211A (en) * | 2018-05-21 | 2018-09-07 | 河南森源电气股份有限公司 | A kind of on-load switch and its static contact component |
| US11101083B2 (en) * | 2017-09-15 | 2021-08-24 | Abb Schweiz Ag | Electrical switch |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI123561B (en) * | 2011-06-07 | 2013-07-15 | Abb Oy | Switch |
| CN102254712A (en) * | 2011-07-18 | 2011-11-23 | 句容华源电器设备有限公司 | Transformer capacity-regulation switch high-voltage contact |
| FI125923B (en) * | 2012-12-20 | 2016-04-15 | Abb Oy | Moving contact of electronic switch |
| GB2524502A (en) * | 2014-03-24 | 2015-09-30 | Eaton Ind Netherlands Bv | Plug contact |
| FI11882U1 (en) * | 2017-09-15 | 2017-12-05 | Abb Oy | Switches |
| DE102020203190B3 (en) | 2020-03-12 | 2021-08-05 | Siemens Aktiengesellschaft | Isolating device and inert gas-insulated medium-voltage power switchgear |
| GB2601156A (en) * | 2020-11-20 | 2022-05-25 | Eaton Intelligent Power Ltd | Changeover switch |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE758459A (en) * | 1969-11-03 | 1971-04-16 | Reinhausen Maschf Scheubeck | Contact bridge for step selectors intended for control transformers |
| JPS6192330A (en) * | 1984-10-12 | 1986-05-10 | Yaskawa Electric Mfg Co Ltd | Compound spring and main circuit breaker using this spring |
| FR2793963B1 (en) * | 1999-05-20 | 2002-02-01 | Schneider Electric Ind Sa | DEVICE FOR CONNECTING A CONTACT RANGE TO A CONNECTION CLIP, FUNCTIONAL UNIT FOR STARTING AN ELECTRICAL CELL COMPRISING SUCH A DEVICE AND CELL EQUIPPED WITH SUCH A UNIT |
| JP2001093750A (en) * | 1999-09-21 | 2001-04-06 | Toshiba Corp | Contact mechanism for tap changers |
| CN101383233B (en) * | 2008-02-26 | 2010-09-08 | 上海华明电力设备制造有限公司 | Moving contact for tap switch |
-
2010
- 2010-01-08 WO PCT/CN2010/070061 patent/WO2011082528A1/en active Application Filing
- 2010-01-08 CN CN2010800608888A patent/CN102804295A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11101083B2 (en) * | 2017-09-15 | 2021-08-24 | Abb Schweiz Ag | Electrical switch |
| CN108511211A (en) * | 2018-05-21 | 2018-09-07 | 河南森源电气股份有限公司 | A kind of on-load switch and its static contact component |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011082528A1 (en) | 2011-07-14 |
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Application publication date: 20121128 |