CN201298445Y - Non-excitation tapping switch convenient for shifting - Google Patents
Non-excitation tapping switch convenient for shifting Download PDFInfo
- Publication number
- CN201298445Y CN201298445Y CNU2008201910362U CN200820191036U CN201298445Y CN 201298445 Y CN201298445 Y CN 201298445Y CN U2008201910362 U CNU2008201910362 U CN U2008201910362U CN 200820191036 U CN200820191036 U CN 200820191036U CN 201298445 Y CN201298445 Y CN 201298445Y
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- Prior art keywords
- contact
- convenient
- shift gears
- circuit tap
- main shaft
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Abstract
The utility model relates to a non-excitation tapping switch used in a transformer, which comprises column fixed contacts arranged circumferentially and insulating end plates arranged up and down, a main shaft is arranged between the insulating end plates in a passing way, the main shaft is coupled with an operating mechanism and provided with an annular movable contact which is spanned between the two adjacent column fixed contacts. The non-excitation tapping switch is characterized in that the contact surface of the column fixed contacts corresponding to the shifting operating tract of the movable contact is a smooth transition curve. The utility model is provided with the smooth transition curve at the contact surface of the fixed contacts corresponding to the shifting operating track of the movable contact, lowers the crowning height of the shifting contact surface, reduces the retraction stroke when the movable contact is shifted so as to decrease the integrated moment of the switch operation, increases the stability of the movable contact movement, reduces the shifting abrasion of the fixed contacts and the movable contact, keeps the contact advantages of stable contact and high reliability of the original contact structure so as to meet the demands that multi-phase or large current single-phase switch is connected in parallel with a plurality of movable contacts.
Description
Technical field
The utility model relates to a kind of off circuit tap changer that is used for transformer.
Background technology
At Chinese patent CN1555070A, CN2454878Y, the structure of contact terminal of several off circuit tap changers is disclosed among the CN2433720Y, moving contact in this structure is an annular, cylindrical and to decide the contact cylindrical tangent and cross-over connection is decided between the contact in two, deciding the corresponding contact-making surface of contact and moving contact gearshift running orbit is the face of cylinder of the same center of circle and radius, when switch is done the tap gear shift, annular dynamic contact is along the side direction opposite side running of deciding the contact periphery, need bigger radial stroke compression moving contact inner spring, the peak that just can cross fixed contact contact cylinder circular arc arrives another gear.The design feature of this contact be simple in structure, can automatic homing, contact is reliable, feel is strong, but being excessive radial stroke, its shortcoming bring operational torque to increase, moving, as to decide contact contact surface wearing and tearing are big, main axis stiffness is required high, for the too much heterogeneous or big electric current single-phase switch of moving contact quantity in parallel, often be difficult to realize or the reliability reduction.
Summary of the invention
Technical problem to be solved in the utility model is to avoid the deficiency of above-mentioned prior art existence and a kind of off circuit tap changer of being convenient to gear shift is provided, and it is contact stabilization, reliability height not only, and operational torque is little.
The utility model is that the technical scheme that problem adopted of the above-mentioned proposition of solution is: include the insulating end plate 1 that the column of circumferentially installing is decided contact 4 and upper and lower setting, be coated with main shaft 2 between insulating end plate, connect operating mechanism 3 on the main shaft, be installed on annular dynamic contact 5 on the main shaft, the annular dynamic contact cross-over connection is decided between the contact 4 in two adjacent columns, it is characterized in that it is mild fillet surface that described column is decided the contact-making surface of the corresponding moving contact gear shift of contact running orbit.
Press such scheme, the periphery of deciding contact in column is provided with insulator 7, and the insulator upper and lower connects insulating end plate 1.
Press such scheme, the non-mild fillet surface that described column is decided contact is the face of cylinder, described mild fillet surface is being decided contact and moving contact mutually on the gearshift running orbit between a side contacts position to the contact position of opposite side of cross-over connection, mild fillet surface can be joined by one or more circular arc cylinders and constitute, usually, the curve that forms on horizontal (radially) cross section of mild fillet surface is positioned at the string that the contact both sides position connects and the formed zone of circular arc on the face of cylinder.
Press such scheme, deciding contact 4 can connect firmly with insulating end plate 1 mutually by two ends, constitutes an independently facies unit, generally is used for single-phase switch; Decide contact and also can connect firmly mutually with insulator 7 inboards, can decide contact by multilayer and constitute heterogeneous switch by its trailing flank; Insulator 7 constitutes the cage type switch during for cage, and insulator constitutes tubular or tubular switch or drum switch during for insulating cylinder.
Deciding contact 4 outer cylinders can be the arc transition face entirely, and Electric Field Distribution is more even like this; Because of fixing or location need, the face that links with insulator also can be the plane.Decide general outer connection of contact, its binding post can also can one or morely be exported radially axially.Decide contact and can be solid cylinder, need also can be hollow-core construction for saving material or dispelling the heat.
The beneficial effects of the utility model are: 1, by at the contact-making surface of deciding the corresponding moving contact gear shift of contact running orbit mild fillet surface being set, make this gear shift contact-making surface become comparatively mild, reduced the crowning height of gear shift contact-making surface, retract stroke when having reduced the moving contact gear shift, consider simultaneously the pressure angle of motion during curved design, the comprehensive torque of switching manipulation is reduced, strengthened the cephalomotor stationarity of movable contact, and reduced moving, as to decide contact gearshift wearing and tearing; 2, keep former structure of contact terminal contact stabilization, contact advantage that reliability is high, make it to satisfy the many needs of heterogeneous or big electric current single-phase switch linkage contact.
Description of drawings
Fig. 1 is the main cutaway view of an embodiment of the utility model.
Fig. 2 is the A-A cutaway view among Fig. 1.
Fig. 3 is a cross section enlarged drawing of deciding contact among Fig. 2.
Fig. 4 is the main cutaway view of another embodiment of the utility model.
Fig. 5 is the B-B cutaway view among Fig. 4.
Fig. 6 is a cross section enlarged drawing of deciding contact among Fig. 5.
Embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
An embodiment of the present utility model such as Fig. 1,2, shown in 3, be single-phase five grades of no excitation drum-shaped shunting switch, include insulator 7, described insulator is an insulating cylinder, the insulator inner circumferential is installed on column and decides contact 4, the insulator upper and lower is provided with insulating end plate 1, the middle part is coated with main shaft 2 between insulating end plate, the main shaft upper end connects operating mechanism 3 by connecting pin, correspondingly vertically on the main shaft decide the supporter 9 that contact is provided with off-centre, supporter is installed radially sliding pin 8 on the supporter between insulating end plate up and down, radially the sliding pin front end is equipped with bearing 6, dispose stage clip 10 thereafter, annular dynamic contact 5 be sleeved on the supporter 9 and with sliding pin radially, bearing and stage clip phase configuration constitute the annular dynamic contact with radical elasticity, and cross-over connection is decided between the contact in two columns; Moving for increasing, decide the contact-making surface between the contact, annular dynamic contact can be set up in parallel 2～5 or more vertically; Described column is decided the most of face of cylinder for the same center of circle and radius R 3 of outer cylinder of contact, the contact-making surface of corresponding moving contact gear shift running orbit, promptly from deciding contact and moving contact mutually on the gear shift running orbit between a side contacts position to the contact position of opposite side of cross-over connection, mild fillet surface is set, and described mild fillet surface is made of with tangent connection of the face of cylinder of non-mild fillet surface an arc surface than two minor radius R1 of arc surface and both sides of long radius R14.Column is decided contact 4 and is connected firmly mutually with insulating end plate 1 by two ends, and column is decided contact and installed 6 along weekly interval in the insulator, constitutes single-phase five grades of no excitation drum-shaped shunting switch.When the switch transition gear, annular dynamic contact 5 is decided contact 4 surface operations in column, move to opposite side from a side of deciding contact, because it is comparatively mild to decide the mild fillet surface of contact 4, the decrement of spring 10 is little, thereby rotating torque is less during switching manipulation, the easier assurance of the rigidity of main shaft and supporter.Need for different geometrical size construction of switch and moment, mild fillet surface can be with a plurality of connection cambered surfaces compositions, improving the pressure angle of moving contact when the different parts, thereby reduce the switch rotating torque.
Second enforcement of the present utility model is shown in Fig. 4,5,6, be one or three to link five grades and do not have the excitation drum-shaped shunting switch, be that with the difference of last embodiment column decides contact 4 and connect firmly mutually by trailing flank and insulating cylinder barrel, the trailing flank that column is decided contact can be the plane, column is decided contact and is installed 6 along weekly interval in the insulator, and lay three rows vertically at interval, constitute five grades of three-phases; Decide contact corresponding to column, the moving contact on the main shaft 2 also is installed on three rows, and every row's moving contact is decided contact mutually corresponding to one, and every phase moving contact is made of 3～4 annular dynamic contacts arranged side by side, and three row's moving contacts are staggered up and down to be installed, and mutually insulated.Decide contact 4 and insulator 7 fixing side R4 among Fig. 6 and can be plane or curved surface, processing is simpler like this, and a side R14 of fillet surface also can be plane or the bigger arc surface of radius of curvature gently.Other structure is identical with a last embodiment.
In the foregoing description, when switching current is big, decide contact 4 axially-extendings, corresponding the increasing of moving contact 5 quantity, the switch height increases and diameter dimension changes not quite, is convenient to make full use of transformer internal height space, and the material-saving that is beneficial to transformer designs.
When insulator of the present utility model is the cage structure that insulating bar is formed, promptly constitute the cage type off circuit tap changer.
The utility model can vertically be installed, and also can horizontally install, and is simple in structure, easy to operate, contact stabilization, reliable.
Claims (10)
1, a kind of off circuit tap changer of being convenient to shift gears, include the column of circumferentially installing and decide the insulating end plate of contact and upper and lower setting, be coated with main shaft between insulating end plate, connect operating mechanism on the main shaft, be installed on annular dynamic contact on the main shaft, the annular dynamic contact cross-over connection is decided between the contact in two adjacent columns, it is characterized in that it is mild fillet surface that described column is decided the contact-making surface of the corresponding moving contact gear shift of contact running orbit.
2, by the described off circuit tap changer of being convenient to shift gears of claim 1, it is characterized in that the periphery of deciding contact in column is provided with insulator, the insulator upper and lower connects insulating end plate.
3, by claim 1 or the 2 described off circuit tap changers of being convenient to shift gears, it is characterized in that described mild fillet surface deciding contact and moving contact mutually on the gearshift running orbit between a side contacts position to the contact position of opposite side of cross-over connection, mild fillet surface can be joined by one or more circular arc cylinders and constitute.
4,, it is characterized in that the curve that described mild fillet surface forms is positioned at the string of contact both sides position connection and the formed zone of circular arc on the face of cylinder on cross section by the described off circuit tap changer of being convenient to shift gears of claim 3.
5, by claim 1 or the 2 described off circuit tap changers of being convenient to shift gears, it is characterized in that deciding contact and connect firmly mutually with insulating end plate, constitute an independently facies unit by two ends.
6, by the described off circuit tap changer of being convenient to shift gears of claim 2, it is characterized in that deciding contact and connect firmly mutually with the insulator inboard by its trailing flank, decide contact by multilayer and constitute heterogeneous switch.
7, by claim 1 or the 2 described off circuit tap changers of being convenient to shift gears, it is characterized in that on the main shaft the corresponding vertically supporter that contact is provided with off-centre of decide, supporter is up and down between the insulating end plate, install radially sliding pin on the supporter, radially the sliding pin front end is equipped with bearing, disposes stage clip thereafter, annular dynamic contact be sleeved on the supporter and with radially sliding pin, bearing and stage clip phase configuration, constitute the annular dynamic contact with radical elasticity, cross-over connection and two columns are decided between the contact.
8,, it is characterized in that described mild fillet surface is made of with tangent connection of the face of cylinder of non-mild fillet surface an arc surface than two minor radius of arc surface and both sides of long radius by the described off circuit tap changer of being convenient to shift gears of claim 4.
9,, it is characterized in that described annular dynamic contact can be set up in parallel 2～5 vertically by the described off circuit tap changer of being convenient to shift gears of claim 7.
10, by the described off circuit tap changer of being convenient to shift gears of claim 6, it is characterized in that described column decides contact and install 6 along weekly interval in the insulator, and lay three rows at interval vertically, constitute five grades of three-phases; Decide contact corresponding to column, the moving contact on the main shaft also is installed on three rows, and every row's moving contact is decided contact mutually corresponding to one, and every phase moving contact is made of 3～4 annular dynamic contacts arranged side by side, and three row's moving contacts are staggered up and down to be installed, and mutually insulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201910362U CN201298445Y (en) | 2008-09-25 | 2008-09-25 | Non-excitation tapping switch convenient for shifting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201910362U CN201298445Y (en) | 2008-09-25 | 2008-09-25 | Non-excitation tapping switch convenient for shifting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201298445Y true CN201298445Y (en) | 2009-08-26 |
Family
ID=41044432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201910362U Expired - Fee Related CN201298445Y (en) | 2008-09-25 | 2008-09-25 | Non-excitation tapping switch convenient for shifting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201298445Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477885B (en) * | 2008-09-25 | 2011-07-06 | 武汉泰普变压器开关有限公司 | Non-exciting shunting switch convenient for shifting |
| CN104465155A (en) * | 2014-12-16 | 2015-03-25 | 贵州长征电气有限公司 | Off-circuit tap-changer for transformation after force discharging of moving contact |
| CN104752076A (en) * | 2015-04-21 | 2015-07-01 | 武汉长虹恒通高压设备有限公司 | Single-phase rolling-ring type contact off-circuit tap changer |
-
2008
- 2008-09-25 CN CNU2008201910362U patent/CN201298445Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477885B (en) * | 2008-09-25 | 2011-07-06 | 武汉泰普变压器开关有限公司 | Non-exciting shunting switch convenient for shifting |
| CN104465155A (en) * | 2014-12-16 | 2015-03-25 | 贵州长征电气有限公司 | Off-circuit tap-changer for transformation after force discharging of moving contact |
| CN104465155B (en) * | 2014-12-16 | 2016-05-18 | 贵州长征电气有限公司 | After unloading power, a kind of moving contact converts off circuit tap changer |
| CN104752076A (en) * | 2015-04-21 | 2015-07-01 | 武汉长虹恒通高压设备有限公司 | Single-phase rolling-ring type contact off-circuit tap changer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090826 Termination date: 20120925 |