CN102074404B - High-reliability outdoor high-voltage isolation switch - Google Patents
High-reliability outdoor high-voltage isolation switch Download PDFInfo
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- CN102074404B CN102074404B CN2011100335976A CN201110033597A CN102074404B CN 102074404 B CN102074404 B CN 102074404B CN 2011100335976 A CN2011100335976 A CN 2011100335976A CN 201110033597 A CN201110033597 A CN 201110033597A CN 102074404 B CN102074404 B CN 102074404B
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Abstract
The invention relates to switch equipment in a power system, in particular to a high-reliability outdoor high-voltage isolation switch. The isolation switch is provided with an oblong-shaped frame, wherein a left fixed porcelain bottle and a right fixed porcelain bottle are arranged at the two ends of the frame; and copper busbars are arranged at the top ends of the two fixed porcelain bottles. The isolation switch is characterized in that: two guide rails are arranged oppositely on the inner sides of two long side plates of the frame; two trolleys are arranged between the two guide rails; a driving device is arranged; a left sliding porcelain bottle and a right sliding porcelain bottle are arranged on the two trolleys respectively; a pair of sliding contact switches is arranged at the top ends of the two sliding porcelain bottles; and the left half and the right half of the pair of sliding contact switches are flexibly connected with the copper busbars on the fixed porcelain bottles on the left and right sides. Four problems such as overheat of a contact, fracture of a porcelain bottle, motion clamping stagnation, insufficient switch-on and switch-off and the like existing in the conventional isolation switch are solved completely; and the isolation switch is used for reliably isolating a part which is required to be switched off from an electrified part in a high-voltage power distribution device, so that maintenance safety is ensured.
Description
(1) technical field: the present invention relates to the switchgear in the electric power system, especially a kind of high reliability outdoor high-voltage isolating switch.
(2) background technology: in the working conference of national electric power system high-voltage switch gear, power consumer is worried the quality condition that runs on the whole nation each electrical network mesohigh isolating switch of 35～500KV.Existing isolating switch structure is referring to Fig. 1,2, and its working method is by operating two fixedly main axis rotation in the porcelain vase, drives fixedly the pair of switches on porcelain vase top and rotates and realize the separating brake combined floodgate.The following four major problem of this isolating switch ubiquity: the one, contact is overheated; The 2nd, porcelain insulator breaking; The 3rd, the motion clamping stagnation; The 4th, divide-shut brake is not in place.
The existence of these problems has had a strong impact on the safe operation of power network.The isolating switch galvanic circle is overheated to be to appear at the contact site, but not other current-carrying part.It is loose contact that the contact site produces overheated basic reason.Loose contact is that its immediate cause is: the invasion and attack of sand and dust, finished ground cement, sleet, moisture and filth (coal smoke, saline and alkaline air, acid rain etc.) cause contact surface dust stratification, incrustation and corrosion because contact degenerates in bad border of atmosphere; The chemical action of oxidation and corrosive gas makes contact surface generate compound film, and these all can cause contact surface resistance to increase, and temperature rise is too high.The way of contact of galvanic circle is divided into fixing contact and connects with discerptible and contact two kinds of connections (contact).The terminal contact point of its fingertip is relatively poor from the cleaning ability, dust stratification, incrustation and oxidation, be easy to generate loose contact, electric current is forced to flow through from built-in spring, and the size that flows through electric current is directly proportional with the degree of loose contact, if it is excessive to flow through electric current in the spring, time has been grown its annealing elasticity is weakened, and reduces contact pressure, and contact resistance is increased, loose contact further worsens, and the contact heating is all the more serious.In addition, the touch spring long-term work produces fatigue deformation, even because corrosion is followed the string, also is the reason that causes the contact loose contact.Because porcelain vase is in the outdoor atmospheric environment for a long time, but also bear the effect of moment to some extent, produce fatigue and aging, its mechanical strength is reduced.Mechanical strength that the porcelain vase of isolating switch is required and terminals mechanical load have direct relation, and enough coefficient of safetys will be arranged.The bending strength of porcelain vase is low to be the key factor that causes the insulator fracture.Wherein motion catching phenomenon often has generation, particularly uses at the high voltage isolator more than 1 year, along with its clamping stagnation failure rate of prolongation of using the time obviously rises; Find to cause the principal element of high voltage isolator mechanical rotation fault through most of user's engineering personnel field investigations: serious Dezincification corrosion took place in the brass axle sleeve after part client adopted the isolating switch of brass axle sleeve to make moist, Zinc oxide powder is crowded with gaps that is slidingly matched, and increases the resistance of motion or can't move at all; Though part adopts three-layer composite self-lubricating bearing corrosion phenomena can not occur in a short time, because coming off of electrodeposited coating still has most beginning corrosions to increase the resistance of motion of rotary part.High voltage isolator owing to the corrosion clamping stagnation, freeze to hinder, reasons such as operation is dumb, operational torque increase, can occur inseparable, do not close or deciliter not in place, functional unit fractures or insulator is subjected to additional stress and ruptures when serious, the security of operation of serious threat electrical network, even cause great power outage.
(3) summary of the invention: purpose of the present invention be exactly to solve that existing isolating switch exists that contact is overheated, porcelain insulator breaking, motion clamping stagnation, divide-shut brake four major problem not in place, a kind of high reliability outdoor high-voltage isolating switch is provided.
Concrete scheme of the present invention is: design has a rectangular frame, fixing porcelain vase about the two ends of framework are equipped with, two fixedly the porcelain vase top copper busbar is installed, it is characterized in that: the inboard positioned opposite at two block length side plates of framework has two guide rails, article two, two dollies are installed between the guide rail, is furnished with drive unit, on two dollies, be separately installed with the porcelain vase that horizontally slips, a pair of sliding contact switch (respectively adorn on two slip porcelain vases switch half) is installed on the top of two slip porcelain vases, the left and right sides two halves of a pair of sliding contact switch respectively with the right and left fixedly the copper busbar on the porcelain vase adopt to be flexible coupling and be connected one to one.
The solution of the present invention two is: design has rectangular frame, fixing porcelain vase about the two ends of framework are equipped with, two fixedly the porcelain vase top copper busbar is installed, it is characterized in that: the inboard positioned opposite at two block length side plates of framework has two guide rails, article two, a dolly is installed between the guide rail, is furnished with drive unit, one slip porcelain vase is installed on dolly, slip porcelain vase top is equipped with half in a pair of sliding contact switch, in this sliding contact switch half by be flexible coupling with one of them fixedly the copper busbar on the porcelain vase be connected, second half in the sliding contact switch be contained in another fixedly on the porcelain vase and with its on copper busbar directly be connected.
Sliding contact switch described in the present invention program one and two is to adopt plum blossom to refer to switch contacts, and it is made of plum blossom fingertip and fixed contact two parts.Sliding contact switch among the present invention can also be: roller type, roller, ball-type, Z-shaped fingertip, helical spring fingertip, watchband shape fingertip.
The drive unit that described in the present invention program one and two is two dolly configurations has framework, by some power transmission shafts one group of travelling gear is housed in framework, and wherein driving shaft one end stretches out outside the framework, and the outer end of driving shaft is furnished with operating grip or motor; In framework, be equipped with one or about two sliding racks, sliding rack is positioned at the one or both sides of final stage output gear and is in transmission connection, sliding rack to an end or respectively to the left and right two ends stretch out the external dolly of framework.
The present invention program one all adopts the plastics self lubrication bearing to be connected with frame assembled with all the power transmission shaft two ends in the drive unit described in two.
The present invention is simple in structure, and is easy to operate, and reliable operation has thoroughly solved the four major problem that existing isolating switch exists.The connected mode of galvanic circle of the present invention adopts the compound mode that is slidingly connected and is fixedly connected.Adopt not only simply but also reliably to be slidingly connected and close two moving contacts of branch, connect moving contact and copper busbar with being flexible coupling, make to be slidingly connected and to be fixedly connected combinedly, reduced manufacturing and maintenance workload.
The present invention has adopted novel sliding contact to connect, and this just makes porcelain vase change the motion mode that reversed originally, and adopts the motion mode of straight line, separating brake feed motion accurately to put in place, reliably.And porcelain vase is mounted on the trolley, has so just reduced the required mechanical strength and the terminals mechanical load of porcelain vase of isolating switch greatly, has reduced to take place the risk of porcelain insulator breaking then greatly.Adopted the plastics self lubrication bearing among the present invention on the power transmission shaft, it is to make by self-lubricating is material modified, its outstanding resistance to wear permanent rotating load that reduces high voltage isolator has been stopped because metal bearing lubricating oil loses that the back rotating load increases or the mechanical rotation fault that occurred because of the corrosion clamping stagnation.
(4) description of drawings:
Fig. 1 is the three-dimensional view of existing isolating switch "on" position;
Fig. 2 is the three-dimensional view of existing isolating switch gate-dividing state;
Fig. 3 is the three-dimensional view of structure one "on" position of the present invention;
Fig. 4 is the three-dimensional view of structure one gate-dividing state of the present invention;
Fig. 5 is master's (cuing open) view of drive car;
Fig. 6 is the vertical view of drive car;
Fig. 7 is the left view of drive car;
Fig. 8 is structure two "on" position three-dimensional views of the present invention.
Among the figure: a 1-left side is porcelain vase fixedly, the 2-copper busbar, and 3-is flexible coupling, 4-left side slip porcelain vase, 5-plum blossom fingertip, the 6-fixed contact, the right slip porcelain vase of 7-, 8-is flexible coupling, the 9-copper busbar, the right fixedly porcelain vase of 10-, 11-framework, 12-dolly, the 13-drive unit, 14-guide rail, 15-framework, 16-sliding rack, the 17-output gear, 18-power transmission shaft, 19-sliding rack, the 20-operating grip, 21-driving gear set, 22-plastics self lubrication bearing, the 23-framework, a 24-left side is porcelain vase fixedly, the 25-copper busbar, the 26-fixed contact, 27-plum blossom fingertip, 28-slip porcelain vase, 29-is flexible coupling, 30-copper busbar, the right fixedly porcelain vase of 31-, the 32-guide rail, 33-dolly, 34-drive unit.
(5) embodiment:
Example 1: referring to Fig. 3,4, the present invention's design has rectangular frame 11, fixing porcelain vase 1 and 10 about the two ends of framework 11 are equipped with, two fixedly porcelain vase 1 and 10 tops are equipped with copper busbar 2 and 9, inboard positioned opposite at two block length side plates of framework 11 has two guide rails 14, article two, two dollies 12 are installed between the guide rail 14, being furnished with drive unit 13 is loaded between two dollies, on two dollies 12, be separately installed with horizontally slip porcelain vase 4 and 7, on the top of two slip porcelain vases 4 and 7 plum blossom is installed and refers to switch contacts, it is made of plum blossom fingertip 5 and fixed contact 6 two parts, respectively on the top of two slip porcelain vases 4 and 7.Plum blossom fingertip 5 and fixed contact 6 respectively with the right and left fixedly the copper busbar 2 and 9 on the porcelain vase 1 and 10 adopt to be flexible coupling and 3 be connected one to one with 8.
Referring to Fig. 5,6,7, in the present embodiment, the drive unit 13 that is 12 configurations of two dollies has framework 15, in framework 15, totally five of one group of travelling gear 21(are housed) by three power transmission shafts 18, wherein driving shaft one end stretches out outside the framework, and is furnished with operating grip 20(or motor in the driving shaft outer end); Two sliding racks 16 and 19, two sliding racks are positioned at the both sides of final stage output gear 17 and are in transmission connection about being equipped with in framework 15, two sliding racks 16 with 19 respectively to the left and right two ends stretch out the framework 15 outer both sides dollies 12 that are connected.
Three power transmission shaft 18 two ends described in the present embodiment in the drive unit all adopt plastics self lubrication bearing 22 to be connected with framework 15 assemblings.
Example 2: referring to Fig. 8, the utility model design has rectangular frame 23, fixing porcelain vase 24 and 31 about the two ends of framework 23 are equipped with, two fixedly porcelain vase 24 and 31 tops are equipped with copper busbar 25 and 30, inboard positioned opposite at two block length side plates of framework 23 has two guide rails 32, article two, a dolly 33 is installed between the guide rail 32, is furnished with drive unit 34, one slip porcelain vase 28 is installed on dolly 33, slip porcelain vase 28 tops are equipped with plum blossom fingertip 27, this plum blossom fingertip 27 by be flexible coupling 29 with the right fixedly the copper busbar 30 on the porcelain vase 31 be connected, with fixed contact 26 that plum blossom fingertip 27 matches be contained in another fixedly on the porcelain vase 24 and with its on copper busbar 25 directly be connected.
In the present embodiment, for the drive unit 34 of dolly 33 configuration substantially with example 1 structure, different is only to join a sliding rack in the drive unit to be connected with dolly 33, and the power transmission shaft two ends in the drive unit described in the present embodiment all adopt plastics self lubrication bearing 22 to be connected with framework 23 assemblings.
Claims (8)
1. high reliability outdoor high-voltage isolating switch, has rectangular frame, fixing porcelain vase about the two ends of framework are equipped with, two fixedly the porcelain vase top copper busbar is installed, it is characterized in that: the inboard positioned opposite at two block length side plates of framework has two guide rails, article two, two dollies are installed between the guide rail, is furnished with drive unit, on two dollies, be separately installed with the porcelain vase that horizontally slips, on the top of two slip porcelain vases a pair of sliding contact switch is installed, the left and right sides two halves of a pair of sliding contact switch respectively with the right and left fixedly the copper busbar on the porcelain vase adopt to be flexible coupling and be connected one to one.
2. a kind of high reliability outdoor high-voltage isolating switch according to claim 1 is characterized in that: described sliding contact switch is to adopt plum blossom to refer to switch contacts, and it is made of plum blossom fingertip and fixed contact two parts.
3. a kind of high reliability outdoor high-voltage isolating switch according to claim 1, it is characterized in that: the drive unit that is two dolly configurations has framework, in framework, one group of travelling gear is housed by some power transmission shafts, wherein driving shaft one end stretches out outside the framework, and the driving shaft outer end is furnished with operating grip or motor; Two sliding racks about in framework, being equipped with, two sliding racks are positioned at the both sides of final stage output gear and are in transmission connection, two sliding racks respectively to the left and right two ends stretch out external two dollies of framework.
4. a kind of high reliability outdoor high-voltage isolating switch according to claim 3 is characterized in that: all the power transmission shaft two ends in the described drive unit all adopt the plastics self lubrication bearing to be connected with frame assembled.
5. high reliability outdoor high-voltage isolating switch, has rectangular frame, fixing porcelain vase about the two ends of framework are equipped with, two fixedly the porcelain vase top copper busbar is installed, it is characterized in that: the inboard positioned opposite at two block length side plates of framework has two guide rails, article two, a dolly is installed between the guide rail, is furnished with drive unit, one slip porcelain vase is installed on dolly, slip porcelain vase top is equipped with half in a pair of sliding contact switch, in this sliding contact switch half by be flexible coupling with one of them fixedly the copper busbar on the porcelain vase be connected, second half in the sliding contact switch be contained in another fixedly on the porcelain vase and with its on copper busbar directly be connected.
6. a kind of high reliability outdoor high-voltage isolating switch according to claim 5 is characterized in that: described sliding contact switch is to adopt plum blossom to refer to switch contacts, and it is made of plum blossom fingertip and fixed contact two parts.
7. a kind of high reliability outdoor high-voltage isolating switch according to claim 5, it is characterized in that: the drive unit that disposes for dolly has framework, in framework, one group of travelling gear is housed by some power transmission shafts, wherein driving shaft one end stretches out outside the framework, and the driving shaft outer end is furnished with operating grip or motor; A sliding rack is installed in framework, and this sliding rack is positioned at a side of final stage output gear and is in transmission connection, and this sliding rack stretches out the external dolly of framework to an end.
8. a kind of high reliability outdoor high-voltage isolating switch according to claim 7 is characterized in that: all the power transmission shaft two ends in the described drive unit all adopt the plastics self lubrication bearing to be connected with frame assembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100335976A CN102074404B (en) | 2011-01-31 | 2011-01-31 | High-reliability outdoor high-voltage isolation switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100335976A CN102074404B (en) | 2011-01-31 | 2011-01-31 | High-reliability outdoor high-voltage isolation switch |
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| CN102074404A CN102074404A (en) | 2011-05-25 |
| CN102074404B true CN102074404B (en) | 2011-09-21 |
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| CN2011100335976A Active CN102074404B (en) | 2011-01-31 | 2011-01-31 | High-reliability outdoor high-voltage isolation switch |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157419B (en) * | 2014-09-06 | 2016-06-29 | 常德天马电器股份有限公司 | Distribution transformer low pressure is flexible coupling the manufacture method of terminal |
| CN104764597A (en) * | 2015-04-22 | 2015-07-08 | 句容华源电器设备有限公司 | Fault detection method for incomplete switching-off and switching-in or large resistance of high-voltage isolation switch |
| CN110416904A (en) * | 2019-07-25 | 2019-11-05 | 湖南长高高压开关集团股份公司 | A kind of maintenance debugging tool of horizontal outdoor high-voltage alternating current isolating switch |
| CN114256011A (en) * | 2021-11-30 | 2022-03-29 | 国网江苏省电力有限公司盐城供电分公司 | High-voltage direct-current circuit breaker capable of preventing arc breakdown |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR776390A (en) * | 1934-07-24 | 1935-01-24 | Merlin Gerin | Improvements to very high voltage electrical switches |
| DE1000902B (en) * | 1953-04-29 | 1957-01-17 | Licentia Gmbh | Compressed gas high-voltage circuit breaker with several interruption points in series with a free air separation section |
| DE102004060165B3 (en) * | 2004-12-14 | 2006-02-09 | Elektrotechnische Werke Fritz Driescher & Söhne Gmbh | Linear-travel disconnector e.g. for medium voltage power supply networks, contact arrangement of contact blade and contact fixed-point contact of post insulator |
| CN2916905Y (en) * | 2006-06-12 | 2007-06-27 | 宁波天安（集团）股份有限公司 | Indoor medium voltage isolating switch |
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Denomination of invention: A high reliability outdoor high voltage disconnector Effective date of registration: 20220113 Granted publication date: 20110921 Pledgee: CITIC Bank Limited by Share Ltd. Huangshi branch Pledgor: HUBEI WANGAN TECHNOLOGY Co.,Ltd. Registration number: Y2022420000011 |
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