CN2859776Y - Plug-in type super high voltage insulating switch contact with resistance - Google Patents
Plug-in type super high voltage insulating switch contact with resistance Download PDFInfo
- Publication number
- CN2859776Y CN2859776Y CN 200620000602 CN200620000602U CN2859776Y CN 2859776 Y CN2859776 Y CN 2859776Y CN 200620000602 CN200620000602 CN 200620000602 CN 200620000602 U CN200620000602 U CN 200620000602U CN 2859776 Y CN2859776 Y CN 2859776Y
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- contact
- stem
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- plug
- rod
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Abstract
The present utility relates to a contact of extreme-high voltage separation switch, comprising movable contact and fixed contact. The fixed contact comprise contact rod and press equalizer ring connecting the contact rod top. The contact rod is hollow tube mounted with assistant contact head between which and contact rod is mounted a return spring. Tube wall of contact rod is uniformly distributed multiple contact head hole, in which main contact head is mounted. Contact rod outside of main contact head is mounted with bushing. Contact rod outside main contact head is installed with bushing. Outside of main contact head is connected by elastomer with internal wall of bushing. Front end of main contact head is mounted with insulation bushing which is installed with switch-off and switch in resistance, one end of which is linked with contact head rod, the other end is connected with arc extinction contact. The contact head has large contact area, good dust-proof effect, large current throughput, strong limit for over voltage, which is especially suitable for extreme high voltage separation switch and large capacity separation switch.
Description
Technical field
The utility model relates to a kind of contact of extra-high-voltage isolated switch.
Background technology
Isolating switch is the break-make that realizes circuit by the contact of contact, therefore, is to contact well as far as possible to the requirement of contact, and contact-making surface is big as far as possible, keeps in touch the face cleaning simultaneously as far as possible.The contact of high voltage isolator has various ways, general all is the pressure that keeps moving contact and decide to contact between the contact by spring leaf, its operation principle and ordinary appliances plug are similar, contact area is little owing to existing for these contacts, the contact is exposed to shortcomings such as outer, can only be applied to relatively low voltage.The dirt-proof boot that the L type contact that Alstom (China) Investment Co., Ltd (ALSTOM) produces can slide in the main contact arranged outside of deciding contact, correspondingly the main contact with moving contact is movably arranged in the shell.Like this, when contact was decided in the moving contact insertion, the shell of moving contact can be with dirt-proof boot to pusher, and the main contact of deciding contact also promotes the main contact of moving contact simultaneously, make in its withdrawal shell, the main contact of deciding contact enters the shell of moving contact, and contacts with auxiliary contact.The contact of this structure has solved dustproof problem well, but still exists the contact contact-making surface little, the problem that current capacity is little.In addition, isolating switch minute, in the making process, because slow motion needs several cycles to disconnect; During this, electric arc constantly extinguishes, burns, between isolating switch and other power equipments, produce reflected wave and high frequency oscillation, the overvoltage that consequent overvoltage multiple produces during far above breaker open operation, during especially for extra-high voltage grid, superpotential multiple is higher than the design level of other equipment, must the overvoltage that cause thus be suppressed.
Summary of the invention
The purpose of this utility model provides that a kind of contact area is big, good dustproof effect, plug-in type extra-high-voltage isolated switch contact with strip resistance of arc extinguishing function.
For achieving the above object, the utility model adopts following technical scheme:
The plug-in type extra-high-voltage isolated switch contact of strip resistance described in the utility model comprises moving contact and decides contact, the top of moving contact has moving contact striking contact, decide the grading ring that contact comprises contact stem and is fixedly connected on the contact stem top, contact stem is the tubulose of hollow, be set with auxiliary contact in the contact stem, be provided with return spring between auxiliary contact and the contact stem, a plurality of contact apertures evenly distribute on the tube wall of contact stem, in this contact apertures main contact is installed, be set with sleeve pipe on the contact stem in the main contact outside, be connected by elastomer between the outside of main contact and the inwall of sleeve pipe; The front end of deciding contact is installed with insulating sleeve, has branch, switching-on resistance in the barrel of insulating sleeve, and an end of branch, switching-on resistance is electrically connected with deciding contact, and the other end is electrically connected with arcing contact that is fixedly mounted on the insulating sleeve front end and grading ring.
Above-mentioned insulating sleeve is sleeved on the front end of sleeve pipe.
Be provided with fairlead between auxiliary contact and the contact stem, the end of auxiliary contact is installed return spring.
The top of above-mentioned auxiliary contact has the striking point, and the correspondence position of moving contact has and the corresponding moving contact striking of striking point shape contact.
Be connected with flexible conductor between above-mentioned each main contact and the contact stem.
After adopting technique scheme, the utlity model has following advantage:
1, can effectively reduce the overvoltage of isolating switch branch, generation when closing a floodgate, lower the insulating requirements of electrical network significantly.
2, contact area is big, and contact-making surface is stressed evenly to reduce heating, can satisfy the requirement of big load isolating switch;
3, good dustproof effect;
4, the striking contact can be avoided the arc erosion main contact, effectively increases the service life;
5, simple and reliable for structure, with low cost, be convenient to maintenance, easy to adjust;
6, applied range can be used for ultra high voltage, supergrid.
Description of drawings
Fig. 1 be an embodiment of the present utility model decide the structure of contact terminal schematic diagram;
Fig. 2 is the structural representation of moving contact;
Fig. 3 is the A-A cutaway view of Fig. 1.
Embodiment
The plug-in type extra-high-voltage isolated switch contact of strip resistance described in the utility model, comprise as shown in Figure 2 moving contact 1 and as Fig. 1, shown in Figure 3 decide contact 2.The top of moving contact 1 has moving contact striking contact 11.Decide the grading ring 22 that contact 2 comprises contact stem 21 and is fixedly connected on the bell mouth shape on contact stem 21 tops, contact stem 21 is the tubulose of hollow, be set with auxiliary contact 24 in the contact stem 21, the front end of auxiliary contact 24 is a cylindrical shape, cylindrical center has the semicircle spheroid of a projection, this semicircle spheroid is exactly a striking point 29, its effect is corresponding with striking contact 11 on the moving contact 1, isolating switch branch, the only burning between 2 striking points of little arc current that produces when closing a floodgate, thus avoid burning out main contact 23.The rear end of auxiliary contact 24 connects spring base by bolt, and return spring 25 is installed in the spring base, and the other end of return spring 25 is end caps that are fixed on contact stem 21 ends.Also be provided with fairlead 28 in the contact stem 21, the center of fairlead 28 has pilot hole, and auxiliary contact 24 passes pilot hole.That the front end tube wall upper edge circumference of contact stem 21 evenly distributes is a plurality of, arrange contact apertures more, and every row can be 3 or a plurality of, and main contact 23 all is installed in each contact apertures.The height of main contact 23 is slightly larger than the thickness of contact stem 21, and upper surface just in time can be contour with the outer surface of contact stem 21 when making it be placed in the contact apertures, and lower surface can touch the cylinder of auxiliary contact 24 front ends.Be set with sleeve pipe 26 on the contact stem 21 in main contact 23 outsides, sleeve pipe 26 is fixedly connected on the contact stem 21 by its two ends, the internal diameter of sleeve pipe 26 is greater than the external diameter of contact stem 21, be connected by elastomer 27 between the inwall of the upper surface of main contact 23 and sleeve pipe 26, this elastomer 27 can be a spring leaf as shown in this embodiment, also can be helical spring or other elastomeric materials.
For arc extinguishing, the anti-overvoltage ability that improves contact, be installed with insulating sleeve 3 at the front end of deciding contact 2, have branch, switching-on resistance 31 in the barrel of insulating sleeve 3, branch, switching-on resistance 31 adopt the double helix noninductive resistances, two electrodes of branch, switching-on resistance 31 are drawn from the two ends of insulating sleeve 3 respectively, the one end is electrically connected with deciding contact 2, and the other end is electrically connected with arcing contact 32 that is fixedly mounted on insulating sleeve 3 front ends and grading ring 22.
Insulating sleeve 3 can have multiple with the connected mode of deciding contact 2.For example, can adopt mode as shown in Figure 1, with insulating sleeve 3 be sleeved on sleeve pipe 26 above, and be bolted to connection on the ring flange of metal, divide, the electrode of switching-on resistance 31 by ring flange with decide contact 2 and be electrically connected.Can also directly be fixedlyed connected with the top of sleeve pipe 26 in the end of insulating sleeve 3, make its direct electrical connection.
As shown in Figure 1, the part that arcing contact 32 is connected with insulating sleeve 3 is the annulus of a sealing, annulus have somely curve inwardly, resilient strip haptic element, when moving contact 1 inserted, these strip haptic elements can be close to the surface of moving contact 1.
In order to improve the electric conductivity between main contact 23 and the contact stem 21, present embodiment links together each main contact 23 by flexible conductor 30 with contact stem 21.
Moving contact 1 as shown in Figure 2 is cylindric, and its diameter is identical with the cylinder diameter of auxiliary contact 24 front ends, or bigger, but less than the internal diameter of contact stem 21.The front end of moving contact 1 has one and puts 29 corresponding pits with striking.During work,, can not influence the useful life of main contact if between striking point 29 and this pit, produce electric arc.Can reduce the destruction of electric arc effectively to contact.
Certainly, if desired, moving contact 1 also can be shapes such as quadrangular, pentagonal prism or six prisms, and this moment is as long as be designed to corresponding shape with contact stem 21.
During combined floodgate, moving contact 1 inserts when decide contact 2, at first and reach between the arcing contact 32 striking apart from and produce electric arc.Because isolating switch branch, closing speed are lower, electric arc will burn by several repeatedly cycles, moving contact 1 could directly be connected with arcing contact 32, during the arc burning since arc current by divide, switching-on resistance 31, minute, under the damping action of switching-on resistance 31, the overvoltage multiple that current interruption suddenly causes descends significantly.Moving contact 1 continues to insert, and promote auxiliary contact 24 and move inwards, and compression retracteding position spring 25, simultaneously, moving contact 1 is connected with main contact 23 by row, and electric current by moving contact 1, main contact 23, flexible conductor 30, contact stem 21, is realized complete conducting successively.
During separating brake, moving contact 1 moves in the other direction, and return spring 25 promotes auxiliary contact 24 and outwards moves, and accelerates the translational speed of moving contact 1, and moving contact 1 is separated with main contact 23 fully.In the moment that moving contact 1 separates with main contact 23 fully, owing to arcing contact 32 still contacts with moving contact 1, in branch, switching-on resistance 31 places in circuit.Moving contact 1 continues to move, withdraw from fully when deciding contact 2, moving contact 1 and decide to produce electric arc between the contact 2, arc current is through undue, switching-on resistance 31, because the damping action of branch, switching-on resistance 31, the overvoltage that produces when making arc extinguishing reduces greatly, thereby produces the level that overvoltage Limiting is allowing during with the isolating switch separating brake.At this moment, the cylinder of auxiliary contact 24 front ends moves to foremost, with the sealing of the space between the main contact 23, reaches main contact 23 dustproof purposes.
Claims (5)
1, the plug-in type extra-high-voltage isolated switch contact of strip resistance, comprise moving contact (1) and decide contact (2), the top of moving contact (1) has moving contact striking contact (11), decide the grading ring (22) that contact (2) comprises contact stem (21) and is fixedly connected on contact stem (21) top, it is characterized in that: contact stem (21) is the tubulose of hollow, be set with auxiliary contact (24) in the contact stem (21), be provided with return spring (25) between auxiliary contact (24) and the contact stem (21), a plurality of contact apertures evenly distribute on the tube wall of contact stem (21), main contact (23) is installed in this contact apertures, be set with sleeve pipe (26) on the contact stem (21) in main contact (23) outside, be connected by elastomer (27) between the outside of main contact (23) and the inwall of sleeve pipe (26); The front end of deciding contact (2) is installed with insulating sleeve (3), have branch, switching-on resistance (31) in the barrel of insulating sleeve (3), one end of branch, switching-on resistance (31) is electrically connected with deciding contact (2), and the other end is electrically connected with arcing contact (32) that is fixedly mounted on insulating sleeve (3) front end and grading ring (22).
2, the plug-in type extra-high-voltage isolated switch contact of strip resistance according to claim 1, it is characterized in that: insulating sleeve (3) is sleeved on the sleeve pipe (26).
3, the plug-in type extra-high-voltage isolated switch contact of strip resistance according to claim 1 and 2 is characterized in that: be provided with fairlead (28) between auxiliary contact (24) and the contact stem (21), the end of auxiliary contact (24) is installed return spring (25).
4, the plug-in type extra-high-voltage isolated switch contact of strip resistance according to claim 1 and 2, it is characterized in that: the top of auxiliary contact (24) has striking point (29), and the correspondence position of moving contact (1) has and striking point (29) shape corresponding moving contact striking contact (11).
5, the plug-in type extra-high-voltage isolated switch contact of strip resistance according to claim 1 and 2 is characterized in that: be connected with flexible conductor (30) between main contact (23) and the contact stem (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620000602 CN2859776Y (en) | 2006-01-10 | 2006-01-10 | Plug-in type super high voltage insulating switch contact with resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620000602 CN2859776Y (en) | 2006-01-10 | 2006-01-10 | Plug-in type super high voltage insulating switch contact with resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2859776Y true CN2859776Y (en) | 2007-01-17 |
Family
ID=37612634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620000602 Expired - Fee Related CN2859776Y (en) | 2006-01-10 | 2006-01-10 | Plug-in type super high voltage insulating switch contact with resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2859776Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101154530B (en) * | 2007-09-04 | 2010-12-15 | 中国西电电气股份有限公司 | Contact terminal device for restraining transient state overvoltage of high-voltage isolating switch |
| CN103117180A (en) * | 2011-11-16 | 2013-05-22 | 施耐德电器工业公司 | Contact assembly and breaker comprising the same |
-
2006
- 2006-01-10 CN CN 200620000602 patent/CN2859776Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101154530B (en) * | 2007-09-04 | 2010-12-15 | 中国西电电气股份有限公司 | Contact terminal device for restraining transient state overvoltage of high-voltage isolating switch |
| CN103117180A (en) * | 2011-11-16 | 2013-05-22 | 施耐德电器工业公司 | Contact assembly and breaker comprising the same |
| CN103117180B (en) * | 2011-11-16 | 2015-12-02 | 施耐德电器工业公司 | Contact assembly and the circuit breaker comprising this contact assembly |
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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: 20070117 Termination date: 20100210 |