CN101661834A - Off circuit tap changer for transformer - Google Patents
Off circuit tap changer for transformer Download PDFInfo
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- CN101661834A CN101661834A CN200910063726A CN200910063726A CN101661834A CN 101661834 A CN101661834 A CN 101661834A CN 200910063726 A CN200910063726 A CN 200910063726A CN 200910063726 A CN200910063726 A CN 200910063726A CN 101661834 A CN101661834 A CN 101661834A
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- circuit tap
- moving contact
- tap changer
- electric conductor
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Abstract
The invention relates to an off circuit tap changer for a transformer, comprising an upper support seat and a lower support seat. Insulators are circumferentially distributed between the upper supportseat and the lower support seat; annular fixed contacts are arranged at intervals along the axial direction of the insulators; moving contact components are arranged between the upper support seat and the lower support seat and inside the annular fixed contacts; the moving contact components are connected with an upper driving device and a lower driving device; and moving contacts bridged with two adjacent fixed contacts are arranged corresponding to the annular fixed contacts in the peripheral region of the moving contact components. The off circuit tap changer is characterized in that eachmoving contact consists of an electric conductor and at least two annular conductive springs, the annular conductive springs are embedded in an annular groove of the electric conductor, and the external and internal circumferences of each annular conductive spring are respectively contacted with the fixed contacts and the electric conductor. The off circuit tap changer has simple structure and reliable running, not only simplifies the structure of the moving contact, but also improves the contact performance and the conductive performance of the moving contacts and the fixed contacts, is beneficial to improving electric fields around the off circuit tap changer and enhancing the service performance of the off circuit tap changer, and is particularly suitable for high-voltage and heavy-current tap changers based on single and three phase wiring principles.
Description
Technical field
The present invention relates to a kind of transformer off circuit tap changer, is the further improvement to existing off circuit tap changer.
Background technology
A kind of excitation-free cage type tapping switch is disclosed in Chinese patent CN200944364, its structure is that annular fixed contact is set, annular fixed contact distributes vertically, be fixed on by cylindrical on each insulating bar of circumferential arrangement, such annular fixed contact can strengthen the mechanical strength and the rigidity of cage type insulator.Switch movable contact slides up and down cross-over connection two adjacent fixed contacts in the ring of ring-type fixed contact, realize voltage regulation function.This switch can be realized big electric current, good rigidly.This switch movable contact is made of the strip moving contact that is installed in the shell-like support circumference, and every strip moving contact contact is less by electric current, but moving contact structure is complicated, and the both ends electric field is relatively poor.With the lifting of switching voltage grade, its structural advantage is also desirable not to the utmost.
Summary of the invention
Technical problem to be solved by this invention is to avoid the deficiency of above-mentioned prior art existence and provides a kind of structure of contact terminal more simple, reliable, and the transformer off circuit tap changer that electric field is optimized.
The present invention is that to address the above problem the technical scheme of being taked as follows: comprise, undersetting 2,3, on, circumferentially be laid with insulator 4 between undersetting, install annular fixed contact 7 along the axially spaced-apart of insulator, last, between undersetting and annular fixed contact inboard is provided with moving contact component, moving contact component links with transmission device up and down, the corresponding annular fixed contact of the periphery of moving contact component 6 is installed on and the adjacent two fixed contacts moving contact of cross-over connection mutually, its difference is that described moving contact is made of electric conductor 14 and 2 annular power springs 15 at least, the annular power spring is embedded in the annular groove 16 of electric conductor, and outer interior the contacting with fixed contact and electric conductor 14 respectively in week of annular power spring.
Press such scheme, described annular power spring 15 is made of single helical spring headtotail; Described single helical spring is formed by electric conductivity and the good wire coiling of elastic performance.
Press such scheme, described electric conductor is cylindric electric conductor, offers annular groove 16 at the periphery upper and lower of cylinder corresponding to the fixed contact of phase cross-over connection, setting-in annular power spring 15 in the annular groove.
Press such scheme, described insulator is the cage type insulator, and by constituting along the insulating bar of circumferentially installing at interval, annular fixed contact is installed in the cage type insulator and the inboard of insulating bar links.
Press such scheme, described insulator is the tubular insulator, is made of insulating concrete cylinder, and annular fixed contact is installed in the tubular insulator and links with the tube inwall.
Press such scheme, described moving contact component 6 is made of supporter and moving contact, and the electric conductor of supporter and moving contact links.
Beneficial effect of the present invention is: 1, dynamic and static contact is by annular power spring contact conducting, because spring self elasticity and conductivity are better, each circle of spring is exactly a pair of little contact, thereby in very little structure, realize multipoint-parallel, thereby effectively improve the contact condition of dynamic and static contact, be specially adapted to the switch of big electric current; 2, annular power spring in groove, will not influenced field uniformity by the moving contact shielding, because dynamic and static structure of contact terminal is simple, and the balanced smooth improvement that helps switch periphery electric field of profile, thereby the insulation level of raising switch; 3, the present invention is simple in structure, and is reliable, not only simplified moving contact structure, but also improved the contact performance and the electric conductivity of dynamic/static contact, strengthened the switch serviceability; The present invention is particularly useful for list, the high voltage of the various connection principles of three-phase, large-current tap switch.
Description of drawings
Fig. 1 is the front view of one embodiment of the invention.
Fig. 2 is the E-E profile of Fig. 1.
Fig. 3 is the F-F profile of Fig. 1.
Fig. 4 is the annular power spring schematic diagram of Fig. 1.
Embodiment
Further specify embodiments of the invention below in conjunction with accompanying drawing.
Embodiments of the invention are shown in Fig. 1,2,3,4, it is a single-phase excitation-free cage type tapping switch, has upper and lower bearing 2,3, be coated with drive screw 5 between the upper and lower bearing, drive screw top links to each other with operating mechanism 1, drive screw and the swivel nut phase configuration that links with moving contact component 6, swivel nut and supporter link or are linked into one, constitute screw transmission device up and down; Described transmission device up and down also can adopt telescopic cylinder or rack-and-pinion device; The edge circumferentially is laid with 6 insulating bars 4 between last undersetting, along insulating bar is axial arranged annular fixed contact 7 arranged, annular fixed contact links with insulating bar 4 by the connection boss 12 usefulness bolts 13 of cylindrical setting, annular fixed contact connects with 1 of the insulating bar interleaved of circumferentially installing again, promptly 1 annular fixed contact and 3 staggered insulating bars at interval link, neighbouring two annular fixed contacts do not link with same insulating bar, and between annular fixed contact and not joining insulating bar, leave certain interval, form oil clearance 8.Last, between undersetting and annular fixed contact inboard is provided with moving contact component, moving contact component links with transmission device up and down, the corresponding annular fixed contact of the periphery of moving contact component 6 is installed on and the adjacent two fixed contacts moving contact of cross-over connection mutually, moving contact component is made of supporter and moving contact, described moving contact is made of electric conductor 14 and 2 annular power springs 15 at least, electric conductor is cylindric electric conductor, periphery upper and lower at cylinder is offered annular groove 16 corresponding to the fixed contact of phase cross-over connection, setting-in annular power spring 15 in the annular groove, the annular power spring becomes ring to constitute by single helical spring headtotail, the outer circumference diameter of annular power spring is greater than the electric conductor outer circumference diameter, make annular power spring periphery protrude in the electric conductor periphery make spring radially pressurized make electric conductor become Elastic Contact with fixed contact, realize a pair of little contact of every circle, multipoint-parallel makes, the fixed contact conducting.For improving the rigidity of the cage type insulator that insulating bar constituted, behind comprehensive insulation creep distance, between the insulating bar of circumferentially laying, can connect insulation support ring 9, the insulation support ring was installed between being separated by of two fixed contacts, circle or cylindrical and insulating bar link in it, play and strengthen the effect of cage body.In addition, according to the needs that are connected with transformer coil, on annular fixed contact, be installed with binding post 10 by bolt 11.
The present invention is equally applicable to heterogeneous switch, and the foregoing description basis is provided with heterogeneous dynamic and static sets of contacts like this.Be applicable to the switch of various connection principles simultaneously, as Y-△ conversion, connection in series-parallel conversion, single spanning connect, multiple modes such as linear accent.The present invention is specially adapted to high voltage, high-current switch, can satisfy big, special type transformer demand.
Claims (10)
1, a kind of transformer off circuit tap changer, comprise, undersetting, on, circumferentially be laid with insulator between undersetting, axially spaced-apart along insulator is installed annular fixed contact, last, between undersetting and annular fixed contact inboard is provided with moving contact component, moving contact component links with transmission device up and down, the corresponding annular fixed contact of the periphery of moving contact component is installed on and the adjacent two fixed contacts moving contact of cross-over connection mutually, it is characterized in that described moving contact is made of electric conductor and 2 annular power springs at least, the annular power spring is embedded in the annular groove of electric conductor, and outer interior the contacting with fixed contact and electric conductor respectively in week of annular power spring.
2, by the described transformer off circuit tap changer of claim 1, it is characterized in that described annular power spring is made of single helical spring headtotail.
3, by the described transformer off circuit tap changer of claim 2, it is characterized in that described single helical spring is formed by electric conductivity and the good wire coiling of elastic performance.
4, by claim 1 or 2 described transformer off circuit tap changers, it is characterized in that described electric conductor is cylindric electric conductor, offer annular groove corresponding to the fixed contact of phase cross-over connection, setting-in annular power spring in the annular groove at the periphery upper and lower of cylinder.
5, by claim 1 or 2 described transformer off circuit tap changers, it is characterized in that described insulator is the cage type insulator, by constituting along the insulating bar of circumferentially installing at interval, annular fixed contact is installed in the interior inboard with insulating bar of cage type insulator and links.
6, by claim 1 or 2 described transformer off circuit tap changers, it is characterized in that described insulator is the tubular insulator, constitute that annular fixed contact is installed in the tubular insulator and links with the tube inwall by insulating concrete cylinder.
7, by claim 1 or 2 described transformer off circuit tap changers, it is characterized in that described moving contact component is made of supporter and moving contact, the electric conductor of supporter and moving contact links.
8, by the described transformer off circuit tap changer of claim 1, it is characterized in that being coated with drive screw between the upper and lower bearing, drive screw top links to each other with operating mechanism, drive screw and the swivel nut phase configuration that links with moving contact component, swivel nut and supporter link or are linked into one, constitute screw transmission device up and down.
9, by the described transformer off circuit tap changer of claim 5, it is characterized in that annular fixed contact links with bolt and insulating bar by the connection boss of cylindrical setting, annular fixed contact connects with 1 of the insulating bar interleaved of circumferentially installing again, neighbouring two annular fixed contacts do not link with same insulating bar, and between annular fixed contact and not joining insulating bar, leave certain interval, form oil clearance.
10, by the described transformer off circuit tap changer of claim 9, it is characterized in that between the insulating bar of circumferentially laying, connecting the insulation support ring, the insulation support ring was installed between being separated by of two fixed contacts, the insulation support ring was installed between being separated by of two fixed contacts, and circle or cylindrical and insulating bar link in it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910063726A CN101661834B (en) | 2009-08-26 | 2009-08-26 | Off circuit tap changer for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910063726A CN101661834B (en) | 2009-08-26 | 2009-08-26 | Off circuit tap changer for transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101661834A true CN101661834A (en) | 2010-03-03 |
| CN101661834B CN101661834B (en) | 2012-10-10 |
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ID=41789774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910063726A Expired - Fee Related CN101661834B (en) | 2009-08-26 | 2009-08-26 | Off circuit tap changer for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101661834B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169751A (en) * | 2011-02-12 | 2011-08-31 | 辽宁金立电力电器有限公司 | Bar-shaped no-excitation tap switch with gear positioning |
| CN105513838A (en) * | 2014-09-25 | 2016-04-20 | 莫诺产业股份有限公司 | No-load tap switch of middle and low voltage distribution transformer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2096807U (en) * | 1991-07-15 | 1992-02-19 | 武汉长虹电器厂 | Excitless plate shape shunting switch |
| CN2433720Y (en) * | 2000-07-28 | 2001-06-06 | 武汉泰普变压器开关有限公司 | No-field positive-and-negative voltage regulating tap charger |
| CN1193389C (en) * | 2001-09-05 | 2005-03-16 | 中国科学院金属研究所 | Spring touch finger for high-voltage switch and its manufacture |
| CN1905094B (en) * | 2006-08-07 | 2010-05-12 | 武汉泰普变压器开关有限公司 | Non-exciting reversing change-over voltage regulating strip-shape tap switch |
| CN1933055B (en) * | 2006-09-12 | 2010-08-04 | 武汉泰普变压器开关有限公司 | Non-field cage-shape tap changer for transformer |
| CN201498342U (en) * | 2009-08-26 | 2010-06-02 | 武汉泰普变压器开关有限公司 | No-excitation tapping switch used in transformer |
-
2009
- 2009-08-26 CN CN200910063726A patent/CN101661834B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169751A (en) * | 2011-02-12 | 2011-08-31 | 辽宁金立电力电器有限公司 | Bar-shaped no-excitation tap switch with gear positioning |
| CN102169751B (en) * | 2011-02-12 | 2012-08-22 | 辽宁金立电力电器有限公司 | Bar-shaped no-excitation tap switch with gear positioning |
| CN105513838A (en) * | 2014-09-25 | 2016-04-20 | 莫诺产业股份有限公司 | No-load tap switch of middle and low voltage distribution transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101661834B (en) | 2012-10-10 |
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Granted publication date: 20121010 Termination date: 20210826 |
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| CF01 | Termination of patent right due to non-payment of annual fee |