CN105448576A - Disconnecting switch used for large current ice melting of high-voltage power transmission line - Google Patents
Disconnecting switch used for large current ice melting of high-voltage power transmission line Download PDFInfo
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- CN105448576A CN105448576A CN201510921654.2A CN201510921654A CN105448576A CN 105448576 A CN105448576 A CN 105448576A CN 201510921654 A CN201510921654 A CN 201510921654A CN 105448576 A CN105448576 A CN 105448576A
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- conducting
- conducting axle
- driving
- axle
- rotating shaft
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/026—Movable parts and contacts mounted thereon
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a disconnecting switch used for large current ice melting of a high-voltage power transmission line. Two fixed contacts and an on-off control device are respectively arranged on a pedestal through insulator struts; the on-off control device comprises a conducting shaft and an insulation rotating shaft; two fixed contacts are separately arranged at two sides of the insulation rotating shaft; each fixed contact is provided with a U-shaped groove; the conducting shaft is arranged on the insulation rotating shaft, and the conducting shaft can rotate, so that two ends are respectively embedded into or are simultaneously far away from the U-shaped grooves of the two fixed contacts; a telescopic contact finger and two fixed contact fingers are arranged on two ends of the conducting shaft; the telescopic contact finger can break away from the bottom surfaces of the U-shaped grooves through sliding or be in close contact with the bottom surfaces of the U-shaped groove; the two fixed contact fingers can rotate along with the conducting shaft to break away from or be in close contact with two lateral surfaces of each U-shaped groove; the disconnecting switch further comprises a first driving component used for driving the conducting shaft to rotate along the insulation rotating shaft, a second driving component used for driving the conducting shaft to rotate along the own axis and a third driving component used for driving the telescopic contact finger to carry out concertina movement. The disconnecting switch has the advantages of reasonable structural design, good heat dissipation effect, strong through-current capability and high safe reliability.
Description
Technical field
The present invention relates to electrical engineering equipment technology field, be specifically related to a kind of isolating switch for ultra-high-tension power transmission line great current deicing.
Background technology
China affects one of comparatively serious country by icing disaster in the world, icing can cause the major accidents such as the transmission line broken string of falling tower, insulator arc-over, extra high voltage line is as bulk transmission grid, once there is the broken string of falling tower, to large area blackout be caused, bring serious loss to power grid enterprises and national economy.For 2008, ice damage caused the large area broken string of falling tower, and the loss caused to power grid enterprises is up to tens billion of.It is ice-melts that current electric power system ice damage prevents and treats effective measures the most, by the thermal effect of electric current, reaches the object that icing is melted.Ice melting current generally realizes ice-melt by circuit on isolating switch, existing isolating switch current levels is at about 6300A, 500kV can be met and with the ice-melt of line, and extra high voltage line generally adopts eight bundle conductors, ice melting current is generally at more than 10000A, and existing isolating switch current levels cannot meet the ice-melt of large-section lead.The through-current capability of isolating switch is mainly reflected in the contact part of isolating switch, existing switch touching header structure is generally single horizontal crimping structure, contact and fingertip contact little, contact resistance is higher, can superheating phenomenon be there is when passing to big current, time serious, will the ablation of isolating switch be caused to cause ice-melt failure.Along with developing rapidly of extra high voltage line, a lot of ultra high voltage all passes through serious icing region, and extra high voltage line ice-melt is imperative, therefore needs badly and develops a kind of isolating switch special for great current deicing.
Summary of the invention
The technical problem to be solved in the present invention is the deficiency overcoming prior art existence, provides the isolating switch for ultra-high-tension power transmission line great current deicing that a kind of reasonable in design, good heat dissipation effect, through-current capability are strong, security reliability is high.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of isolating switch for ultra-high-tension power transmission line great current deicing, comprise two respectively with deicing device output with treat the fixed contact that DC ice-melting is connected and the on-off control device for being communicated with or disconnecting two fixed contacts, two described fixed contacts and on-off control device are installed on a pedestal respectively by insulator pillar, described on-off control device comprises conducting axle and rotates the insulation rotating shaft be arranged on insulator pillar, two fixed contacts are divided into the both sides of insulation rotating shaft, each fixed contact is provided with U-type groove, described conducting axle is installed in insulation rotating shaft, and conducting axle can make two ends embed respectively or simultaneously away from the U-type groove of two fixed contacts around own axis simultaneously, the two ends of described conducting axle are equipped with a flexible fingertip and two fixing fingertips, described flexible fingertip slides axially along conducting axle and arranges and depart from or the bottom surface of close contact U-type groove by sliding, two fixing fingertips are axisymmetric relative to conducting to be fixed on conducting axle and to rotate with conducting axle and depart from or two sides of close contact U-type groove, described on-off control device also comprises for driving conducting axle around the first driven unit of insulation axis of rotation, for driving conducting axle around the second driven unit of conducting axle own axis with for driving the 3rd driven unit of flexible fingertip stretching motion.
Above-mentioned isolating switch, preferably, the axis vertical of described insulation rotating shaft is arranged, the axis horizontal of described conducting axle is arranged, two sides of described U-type groove are two levels and spaced apart horizontal plane.
Above-mentioned isolating switch, preferably, the largest interval distance of surface on conducting Axial and radial direction of two fixing fingertips is greater than the distance between two sides of U-type groove.
Above-mentioned isolating switch, preferably, described first driven unit comprises the first driving handwheel, is installed on the first driving shaft on insulator pillar and is fixed in the first bevel gear in insulation rotating shaft, described first drives handwheel to be fixed in one end of the first driving shaft, and the other end of described first driving shaft is connected with the second bevel gear coordinating transmission with the first bevel gear.
Above-mentioned isolating switch, preferably, described second driven unit comprises the second driving handwheel, the second driving shaft be installed on insulator pillar, the second spur gear of being installed on the first spur gear on insulator pillar and being fixed on conducting axle, described first spur gear drives handwheel to be connected by the second driving shaft and second, and described second spur gear is connected with the first spur gear by the interlock tooth bar arranged that slides.
Above-mentioned isolating switch, preferably, described 3rd driven unit comprises the 3rd handwheel, be installed on telescopic drive gear on conducting axle and two to slide axially the flexible tooth bar arranged along conducting axle, two flexible tooth bars be divided into telescopic drive gear both sides and with telescopic drive gears meshing, the flexible fingertip at described conducting axle two ends is connected on two flexible tooth bars, and described 3rd handwheel is connected with telescopic drive gear by the 3rd driving shaft.
Compared with prior art, the invention has the advantages that: the isolating switch that the present invention is used for ultra-high-tension power transmission line great current deicing adopts the mode of the U-type groove close contact of flexible fingertip and two fixing fingertips and fixed contact to carry out conducting ice melting current, increase the contact area of moving contact (each fingertip) and fixed contact and crimp dynamics, greatly improve the through-current capability of isolating switch, can conducting ice-melt with security and stability time electric current, avoid occurring contact ablation because electric current is excessive, particularly for ultrahigh current during extra high voltage line ice-melt, can ensure that deicing processes carries out reliable and stablely, further, when conducting axle separates with fixed contact, insulation distance is large, can be good at realizing deicing device and the insulation of being with some circuit, and fail safe is high.The reasonable in design of this isolating switch, good heat dissipation effect, there will not be superheating phenomenon by during big current, and it is simple to operate laborsaving, and circuit access is convenient.Prove through analogue test, the radiating effect of this isolating switch is good, and working stability is safe and reliable, reaches designing requirement completely.
Accompanying drawing explanation
Fig. 1 is the structural representation sketch of isolating switch.
Fig. 2 is that in the first driven unit, the first bevel gear is fixed in the structural representation in insulation rotating shaft.
Fig. 3 is the structural representation that in the second driven unit, the second spur gear is connected with the first spur gear by interlock tooth bar.
Fig. 4 is the structural representation that in the 3rd driven unit, telescopic drive gear coordinates with two flexible tooth bars.
Fig. 5 be that flexible fingertip departs from the bottom surface of U-type groove and two fixing fingertips depart from two sides of U-type groove time schematic diagram.
Fig. 6 be flexible fingertip depart from the bottom surface of U-type groove and two sides of two fixing fingertip close contact U-type groove time schematic diagram.
Fig. 7 be the bottom surface of flexible fingertip close contact U-type groove and two sides of two fixing fingertip close contact U-type groove time schematic diagram.
Marginal data:
1, fixed contact; 11, U-type groove; 2, on-off control device; 21, conducting axle; 22, insulation rotating shaft; 23, flexible fingertip; 24, fixing fingertip; 25, the first bevel gear; 26, the first spur gear; 27, the second spur gear; 28, telescopic drive gear; 29, flexible tooth bar; 210, link tooth bar; 3, insulator pillar; 4, pedestal.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, the present invention is used for the isolating switch of ultra-high-tension power transmission line great current deicing, comprise two respectively with deicing device output with treat fixed contact 1 that DC ice-melting is connected and the on-off control device 2 for being communicated with or disconnecting two fixed contacts 1, two fixed contacts 1 and on-off control device 2 are installed on a pedestal 4 respectively by insulator pillar 3, on-off control device 2 comprises conducting axle 21 and rotates the insulation rotating shaft 22 be arranged on insulator pillar 3, two fixed contacts 1 are divided into the both sides of insulation rotating shaft 22, each fixed contact 1 is provided with U-type groove 11, conducting axle 21 is installed in insulation rotating shaft 22, and conducting axle 21 can make the two ends of conducting axle 21 embed respectively or simultaneously away from the U-type groove 11 of two fixed contacts 1 around own axis simultaneously, the two ends of conducting axle 21 are equipped with a flexible fingertip 23 and two fixing fingertips 24, flexible fingertip 23 slides axially along conducting axle 21 and arranges and depart from by sliding or the bottom surface of close contact U-type groove 11, two fixing fingertips 24 depart from or two sides of close contact U-type groove 11 relative to being fixed on conducting axle 21 and rotating with conducting axle 21 of conducting axle 21 symmetry, on-off control device 2 also comprises the first driven unit for driving conducting axle 21 to rotate around insulation rotating shaft 22, for driving conducting axle 21 around the second driven unit of conducting axle 21 own axis with for driving the 3rd driven unit of flexible fingertip 23 stretching motion.
Order about conducting axle 21 by the first driven unit to rotate around insulation rotating shaft 22, the two ends of conducting axle 21 can be made to embed respectively or simultaneously away from the U-type groove 11 of two fixed contacts 1 simultaneously, when the two ends of conducting axle 21 embed the U-type groove 11 of two fixed contacts 1 respectively simultaneously (see Fig. 5), conducting axle 21 is ordered about around conducting axle 21 own axis by the second driven unit, two fixing fingertips 24 are made to rotate two side close contacts (see Fig. 6) with U-type groove 11 with conducting axle 21, ordered about the bottom surface close contact (see Fig. 7) of flexible fingertip 23 extend action and U-type groove 11 by the 3rd driven unit simultaneously, namely complete and connect deicing device and treat DC ice-melting, realize great current deicing, after ice-melt terminates, conducting axle 21 is ordered about around conducting axle 21 own axis by the second driven unit, two fixing fingertips 24 are made to rotate two sides departing from U-type groove 11 with conducting axle 21, ordered about the bottom surface of flexible fingertip 23 retraction action disengaging U-type groove 11 by the 3rd driven unit simultaneously, ordering about conducting axle 21 by the first driven unit again rotates respectively simultaneously away from the U-type groove 11 of two fixed contacts 1 around insulation rotating shaft 22, being separated of conducting axle 21 and each fixed contact 1 can be realized, and reach insulation distance and meet the demands, conducting axle 21 is that the axis of conducting axle 21 is vertical with the line between two fixed contacts 1 away from the optimum position of two fixed contacts 1, distance under this state between conducting axle 21 and two fixed contacts 1 farthest.
This isolating switch adopts flexible fingertip 23 and two fixing fingertips 24 to carry out conducting ice melting current with the mode of U-type groove 11 close contact of fixed contact 1, increase the contact area of moving contact (each fingertip) and fixed contact 1 and crimp dynamics, greatly improve the through-current capability of isolating switch, can conducting ice-melt with security and stability time electric current, avoid occurring contact ablation because electric current is excessive, particularly for ultrahigh current during extra high voltage line ice-melt, can ensure that deicing processes carries out reliable and stablely; Further, when conducting axle 21 separates with fixed contact 1, insulation distance is large, can be good at realizing deicing device and the insulation of being with some circuit, and fail safe is high.The reasonable in design of this isolating switch, good heat dissipation effect, there will not be superheating phenomenon by during big current, and it is simple to operate laborsaving, and circuit access is convenient.Prove through analogue test, the radiating effect of this isolating switch is good, and working stability is safe and reliable, reaches designing requirement completely.
Preferably, the axis vertical of insulation rotating shaft 22 is arranged, the axis horizontal of conducting axle 21 is arranged, two sides of U-type groove 11 are two levels and spaced apart horizontal plane.Conducting axle 21 be installed on insulation rotating shaft 22 on and can install in the following ways around own axis: insulation rotating shaft 22 on an affixed mounting blocks, mounting blocks is provided with the through hole that is rotatably assorted, conducting axle 21 runs through to be arranged on and is rotatably assorted in through hole, arranges a locating part respectively move axially to limit conducting axle 21 at the two ends of the through hole that is rotatably assorted.
Preferably, the surface of two fixing fingertips 24 is greater than the distance between two sides of U-type groove 11 in conducting axle 21 largest interval distance in the radial direction, such two fixing fingertips 24 rotate two side-contact types with U-type groove 11 with conducting axle 21, can certain swelling effect be formed, realize crimping closely.
In the present embodiment, first driven unit comprises the first driving handwheel, is installed on the first driving shaft on insulator pillar 3 and is fixed in the first bevel gear 25 in insulation rotating shaft 22, first drives handwheel to be fixed in one end of the first driving shaft, the other end of the first driving shaft is connected with the second bevel gear coordinating transmission with the first bevel gear 25, the first bevel gear 25 be fixed in insulation rotating shaft 22 on structure see Fig. 2.Rotating first drives handwheel to order about the second bevel gear rotation, second bevel gear is ordered about the first bevel gear 25 again and rotates, and then driving insulation rotating shaft 22 is rotated with the conducting axle 21 be mounted thereon, realize making conducting axle 21 around insulation rotating shaft 22 rotation embedding or away from U-type groove 11.
In the present embodiment, second driven unit comprises the second driving handwheel, the second driving shaft be installed on insulator pillar 3, the second spur gear 27 of being installed on the first spur gear 26 on insulator pillar 3 and being fixed on conducting axle 21, first spur gear 26 drives handwheel to be connected by the second driving shaft and second, and the second spur gear 27 is connected (see Fig. 3) by the interlock tooth bar 210 arranged that slides with the first spur gear 26.Rotation second drives handwheel to order about the first spur gear 26 and rotates, first spur gear 26 orders about the second spur gear 27 by interlock tooth bar 210 and rotates, and then drive conducting axle 21 around own axis, realize two fixing fingertips 24 are departed from or two sides of close contact U-type groove 11.
In the present embodiment, 3rd driven unit comprises the 3rd handwheel, be installed on telescopic drive gear 28 on conducting axle 21 and two to slide axially the flexible tooth bar 29 arranged along conducting axle 21, two flexible tooth bars 29 are divided into the both sides of telescopic drive gear 28 and engage (see Fig. 4) with telescopic drive gear 28, the flexible fingertip 23 at conducting axle 21 two ends is connected on two flexible tooth bars 29, and the 3rd handwheel is connected with telescopic drive gear 28 by the 3rd driving shaft.Rotating the 3rd drives handwheel to order about telescopic drive gear 28 and rotate, telescopic drive gear 28 is corresponding orders about two corresponding axially reciprocatings along conducting axle 21 of flexible tooth bar 29, and then drive flexible fingertip 23 to reciprocatingly slide, realize the bottom surface of disengaging or close contact U-type groove 11.
In other embodiments, first driven unit, second driven unit and the 3rd driven unit can also adopt other prior aries, can also by the first driven unit, second driven unit and the 3rd driven unit are integrated into and are controlled by a handwheel, to increase the compactedness of structure, reduce costs, improve the convenience of operation, realize driving conducting axle 21 to rotate respectively by switching mechanism, conducting axle 21 reciprocatingly slides around own axis and flexible fingertip 23, switching mechanism also can adopt prior art, the commutation that such as can use with reference to equipment such as existing automobile or farm machineries and speed change gear.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is also not only confined to above-described embodiment.For those skilled in the art, do not departing from the improvement that obtains under the technology of the present invention concept thereof and conversion also should be considered as protection scope of the present invention.
Claims (6)
1. the isolating switch for ultra-high-tension power transmission line great current deicing, comprise two respectively with deicing device output with treat fixed contact (1) that DC ice-melting is connected and the on-off control device (2) for being communicated with or disconnecting two fixed contacts (1), it is characterized in that: two described fixed contacts (1) and on-off control device (2) are installed on a pedestal (4) respectively by insulator pillar (3), described on-off control device (2) comprises conducting axle (21) and rotation and is arranged at insulation rotating shaft (22) on insulator pillar (3), two fixed contacts (1) are divided into the both sides of insulation rotating shaft (22), each fixed contact (1) is provided with U-type groove (11), described conducting axle (21) is installed in insulation rotating shaft (22), and conducting axle (21) can make two ends embed respectively or simultaneously away from the U-type groove (11) of two fixed contacts (1) around own axis simultaneously, the two ends of described conducting axle (21) are equipped with a flexible fingertip (23) and two fixing fingertips (24), described flexible fingertip (23) slides axially along conducting axle (21) and arranges and depart from or the bottom surface of close contact U-type groove (11) by sliding, what two fixing fingertips (24) were symmetrical relative to conducting axle (21) be fixed in conducting axle (21) is upper and rotate with conducting axle (21) and depart from or two sides of close contact U-type groove (11), described on-off control device (2) also comprises the first driven unit for driving conducting axle (21) to rotate around insulation rotating shaft (22), for driving conducting axle (21) around the second driven unit of conducting axle (21) own axis with for driving the 3rd driven unit of flexible fingertip (23) stretching motion.
2. isolating switch according to claim 1, it is characterized in that: the axis vertical of described insulation rotating shaft (22) is arranged, the axis horizontal of described conducting axle (21) is arranged, two sides of described U-type groove (11) are two levels and spaced apart horizontal plane.
3. isolating switch according to claim 1, is characterized in that: the surface of two fixing fingertips (24) is greater than the distance between two sides of U-type groove (11) in conducting axle (21) largest interval distance in the radial direction.
4. the isolating switch according to claim 1 or 2 or 3, it is characterized in that: the first bevel gear (25) that described first driven unit comprises the first driving handwheel, is installed on the first driving shaft on insulator pillar (3) and is fixed in insulation rotating shaft (22), described first drives handwheel to be fixed in one end of the first driving shaft, and the other end of described first driving shaft is connected with the second bevel gear coordinating transmission with the first bevel gear (25).
5. the isolating switch according to claim 1 or 2 or 3, it is characterized in that: described second driven unit comprises the second driving handwheel, the second driving shaft be installed on insulator pillar (3), the second spur gear (27) of being installed on the first spur gear (26) on insulator pillar (3) and being fixed on conducting axle (21), described first spur gear (26) drives handwheel to be connected by the second driving shaft and second, and described second spur gear (27) is connected with the first spur gear (26) by the interlock tooth bar (210) arranged that slides.
6. the isolating switch according to claim 1 or 2 or 3, it is characterized in that: described 3rd driven unit comprises the 3rd handwheel, be installed on telescopic drive gear (28) on conducting axle (21) and two to slide axially the flexible tooth bar (29) arranged along conducting axle (21), two flexible tooth bars (29) are divided into the both sides of telescopic drive gear (28) and engage with telescopic drive gear (28), the flexible fingertip (23) at described conducting axle (21) two ends is connected on two flexible tooth bars (29), described 3rd handwheel is connected with telescopic drive gear (28) by the 3rd driving shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510921654.2A CN105448576A (en) | 2015-12-14 | 2015-12-14 | Disconnecting switch used for large current ice melting of high-voltage power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510921654.2A CN105448576A (en) | 2015-12-14 | 2015-12-14 | Disconnecting switch used for large current ice melting of high-voltage power transmission line |
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| Publication Number | Publication Date |
|---|---|
| CN105448576A true CN105448576A (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510921654.2A Pending CN105448576A (en) | 2015-12-14 | 2015-12-14 | Disconnecting switch used for large current ice melting of high-voltage power transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105448576A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531531A (en) * | 2016-12-21 | 2017-03-22 | 国网湖南省电力公司 | Extra-high voltage and high-current ice-melting isolation switch |
| CN109904029A (en) * | 2019-04-16 | 2019-06-18 | 中国电力工程顾问集团西南电力设计院有限公司 | Embedded Double fracture ice-melt disconnecting switch |
| CN109904030A (en) * | 2019-04-16 | 2019-06-18 | 中国电力工程顾问集团西南电力设计院有限公司 | Multifunction combined ice-melt disconnecting switch |
| CN110915431A (en) * | 2019-12-17 | 2020-03-27 | 湖南农业大学 | Threshing cylinder with adjustable threshing gap |
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- 2015-12-14 CN CN201510921654.2A patent/CN105448576A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106531531A (en) * | 2016-12-21 | 2017-03-22 | 国网湖南省电力公司 | Extra-high voltage and high-current ice-melting isolation switch |
| CN109904029A (en) * | 2019-04-16 | 2019-06-18 | 中国电力工程顾问集团西南电力设计院有限公司 | Embedded Double fracture ice-melt disconnecting switch |
| CN109904030A (en) * | 2019-04-16 | 2019-06-18 | 中国电力工程顾问集团西南电力设计院有限公司 | Multifunction combined ice-melt disconnecting switch |
| CN110915431A (en) * | 2019-12-17 | 2020-03-27 | 湖南农业大学 | Threshing cylinder with adjustable threshing gap |
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Application publication date: 20160330 |