CN109308976B - Coil type longitudinal magnetic field contact assembly and vacuum arc-extinguishing chamber - Google Patents
Coil type longitudinal magnetic field contact assembly and vacuum arc-extinguishing chamber Download PDFInfo
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- CN109308976B CN109308976B CN201811320931.4A CN201811320931A CN109308976B CN 109308976 B CN109308976 B CN 109308976B CN 201811320931 A CN201811320931 A CN 201811320931A CN 109308976 B CN109308976 B CN 109308976B
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- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 description 6
- 229910018503 SF6 Inorganic materials 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 5
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 5
- 229960000909 sulfur hexafluoride Drugs 0.000 description 5
- GXDVEXJTVGRLNW-UHFFFAOYSA-N [Cr].[Cu] Chemical compound [Cr].[Cu] GXDVEXJTVGRLNW-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000000306 component Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
- H01H33/6644—Contacts; Arc-extinguishing means, e.g. arcing rings having coil-like electrical connections between contact rod and the proper contact
Abstract
The invention relates to a coil-type longitudinal magnetic field contact assembly and a vacuum arc extinguish chamber, wherein the coil-type longitudinal magnetic field contact assembly comprises a conductive rod and a contact piece, a contact base and a follow current contact disc are fixedly connected between the conductive rod and the contact piece, at least two over-current arms are arranged on the contact base, at least two follow current arms which are correspondingly and electrically connected with the over-current arms are arranged on the follow current contact disc, at least two supporting seats which are corresponding to the over-current arms are arranged between the contact base and the follow current contact disc, and the over-current directions of the supporting seats and the follow current arms are the same so that the follow current arms and the supporting seats form a parallel structure. The coil type contact assembly of the invention is provided with the supporting seat between the contact base and the follow current contact disc, thus improving the mechanical strength of the contact assembly, greatly reducing the possibility of deformation of the contact base and the follow current contact disc under the action of multiple closing impact pressure, improving the gap magnetic field between the contact base and the follow current arm and improving the capacity of the contact assembly of the invention for breaking large current.
Description
Technical Field
The invention relates to the technical field of vacuum circuit breakers, in particular to a coil type longitudinal magnetic field contact assembly and a vacuum arc-extinguishing chamber.
Background
At present, sulfur hexafluoride circuit breakers in high-voltage and ultrahigh-voltage circuit breakers occupy the majority, sulfur hexafluoride gas has good insulating property and excellent arc extinguishing property, and the compressive strength of the sulfur hexafluoride gas is 2.5 times that of nitrogen under the same pressure. But sulfur hexafluoride gas is a greenhouse gas, and the greenhouse effect of a single molecule of the sulfur hexafluoride gas is 2.2 ten thousand times that of carbon dioxide. Therefore, the vacuum circuit breaker gradually becomes a future development direction of the circuit breaker due to the advantages of small environmental pollution, small maintenance workload and high performance stability. The current vacuum arc-extinguishing chamber is mainly used in medium-voltage class, and in order to expand the application range of the vacuum circuit breaker and enable the vacuum circuit breaker to be applied to the high-voltage field, research and development of the high-voltage vacuum arc-extinguishing chamber must be carried out, and particularly, a contact structure serving as a core component in the vacuum arc-extinguishing chamber is the most important in research and development work.
The vacuum arc extinguish chamber is internally provided with a movable contact component and a fixed contact component which are oppositely arranged, the two contact components are generally the same in structure and respectively comprise a conductive rod and a contact which is conductively and fixedly connected with the conductive rod. The contact of the vacuum arc-extinguishing chamber is subjected to three development stages of cylindrical contact, introduction of transverse magnetic field and introduction of longitudinal magnetic field. The longitudinal magnetic field can enable electric arcs to be uniformly distributed on the surface of the contact, low electric arc voltage is maintained, and the vacuum arc extinguish chamber has higher recovery speed of medium strength after the arc, so that the capacity of the vacuum circuit breaker for breaking short-circuit current is improved; therefore, the coil type longitudinal magnetic field contact assembly is mainly adopted in the middle and high voltage fields at present. However, most of the coil-type longitudinal magnetic field contact assemblies in the prior art are only provided with one layer of coil, so that the overall magnetic field of the contact assembly is weak, and when the short-circuit fault current of more than 50KA is cut off, the arc is difficult to maintain a diffusion state, so that the arc extinction is difficult.
Therefore, a double-coil contact assembly appears in the prior art, for example, the utility model discloses a longitudinal magnetic field contact structure with an authorization publication number of CN206116279U, including static contact piece and moving contact piece, static contact piece and static conducting rod fixed connection, there is a clearance between static contact piece and moving contact piece, is equipped with longitudinal magnetic field coil between static contact piece and the static conducting rod, and longitudinal magnetic field coil is a double-coil structure composed of a first coil (equivalent to a contact base) and a second coil (equivalent to a follow current contact disc). The double-coil structure enhances the longitudinal magnetic field intensity, is beneficial to the vacuum electric arc to enter a diffusion state, and improves the large current breaking capacity of the vacuum arc-extinguishing chamber; however, two coils of the double-coil contact assembly are made of copper materials, mechanical strength is not high, and the two coils are likely to deform under the action of multiple closing impact pressure, so that the moving contact and the fixed contact cannot be used, and the service life of the vacuum arc extinguish chamber is shortened.
Disclosure of Invention
The invention aims to provide a coil type longitudinal magnetic field contact assembly, which aims to solve the problem that the coil type longitudinal magnetic field contact assembly in the prior art is easy to deform and damage due to low mechanical strength; the invention also aims to provide a vacuum arc-extinguishing chamber with the coil-type longitudinal magnetic field contact assembly, and aims to solve the problem of poor durability of the vacuum arc-extinguishing chamber in the prior art.
In order to achieve the purpose, the technical scheme of the coil type longitudinal magnetic field contact assembly is as follows:
the coil type longitudinal magnetic field contact assembly comprises a conductive rod and a contact blade, a contact base and a follow current contact disc are fixedly connected between the conductive rod and the contact blade, at least two over-current arms are arranged on the contact base, follow current arms which are electrically connected with the over-current arms in a one-to-one correspondence mode are arranged on the follow current contact disc, supporting seats which are in one-to-one correspondence with the over-current arms are arranged between the contact base and the follow current contact disc, and the over-current directions of the supporting seats and the corresponding follow current arms are the same so that the follow current arms and the supporting seats form a.
The beneficial effects are that: according to the coil-type contact assembly, the supporting seat is arranged between the contact base and the follow current contact disc, so that the mechanical strength of the contact assembly is improved, and the possibility of deformation of the contact base and the follow current contact disc under the action of multiple closing impact pressures is greatly reduced; the overcurrent direction on the supporting seat is the same as the overcurrent direction of the follow current arm, so that the supporting seat and the follow current arm form a parallel structure, the direction of a magnetic field generated by current flowing through the supporting seat is the same as the direction of a magnetic field generated by current flowing through the follow current arm, the gap magnetic field between the contact base and the follow current arm is improved, and the capacity of the contact assembly for breaking large current is improved.
Furthermore, the follow current contact disc comprises a center ring, the follow current arms are uniformly distributed on the outer wall surface of the center ring at intervals, the supporting seat is arc-shaped, and the arc-shaped supporting seat is arranged along the center ring. The support rings are circular arc shaped and arranged along the central ring to facilitate electrical connection.
Furthermore, the supporting seat is provided with a connecting part which is vertical to the overflowing arm and the center ring. Which helps to reduce contact resistance.
Furthermore, the center ring and the supporting seat are correspondingly provided with positioning inclined planes for positioning and matching. The fixing strength of the center ring and the supporting seat is enhanced.
Furthermore, the overcurrent arm is a bent overcurrent arm, the bent overcurrent arm comprises an inner overcurrent arm and an outer overcurrent arm which are arranged inside and outside and have opposite extension directions, the inner overcurrent arm and the outer overcurrent arm are connected end to end, the overcurrent directions of the inner overcurrent arm and the outer overcurrent arm are opposite, the supporting seat is electrically connected with the inner overcurrent arm, and the follow current arm is electrically connected with the outer overcurrent arm. Helping to reduce the central magnetic field strength.
The technical scheme of the vacuum arc-extinguishing chamber is as follows:
the vacuum arc extinguish chamber comprises two contact assemblies which are arranged oppositely, at least one contact assembly is a coil-type longitudinal magnetic field contact assembly, the coil-type longitudinal magnetic field contact assembly comprises a conductive rod and a contact piece, a contact base and a follow current contact disc are fixedly connected between the conductive rod and the contact piece, at least two over-current arms are arranged on the contact base, follow current arms which are electrically connected with the over-current arms in a one-to-one correspondence mode are arranged on the follow current contact disc, supporting seats which are in one-to-one correspondence with the over-current arms are arranged between the contact base and the follow current contact disc, and the over-current directions of the supporting seats and the corresponding follow current arms are the same so that the follow.
The beneficial effects are that: according to the coil type contact assembly in the vacuum arc-extinguishing chamber, the supporting seat is arranged between the contact base and the follow current contact disc, so that the mechanical strength of the contact assembly is improved, and the possibility of deformation of the contact base and the follow current contact disc under the action of multiple closing impact pressures is greatly reduced; the overcurrent direction on the supporting seat is the same as the overcurrent direction of the follow current arm, so that the supporting seat and the follow current arm form a parallel structure, the direction of a magnetic field generated by current flowing through the supporting seat is the same as the direction of a magnetic field generated by current flowing through the follow current arm, the gap magnetic field between the contact base and the follow current arm is improved, and the capacity of the vacuum arc-extinguishing chamber for breaking large current is improved.
Furthermore, the follow current contact disc comprises a center ring, the follow current arms are uniformly distributed on the outer wall surface of the center ring at intervals, the supporting seat is arc-shaped, and the arc-shaped supporting seat is arranged along the center ring. The support rings are circular arc shaped and arranged along the central ring to facilitate electrical connection.
Furthermore, the supporting seat is provided with a connecting part which is vertical to the overflowing arm and the center ring. Which helps to reduce contact resistance.
Furthermore, the center ring and the supporting seat are correspondingly provided with positioning inclined planes for positioning and matching. The fixing strength of the center ring and the supporting seat is enhanced.
Furthermore, the overcurrent arm is a bent overcurrent arm, the bent overcurrent arm comprises an inner overcurrent arm and an outer overcurrent arm which are arranged inside and outside and have opposite extension directions, the inner overcurrent arm and the outer overcurrent arm are connected end to end, the overcurrent directions of the inner overcurrent arm and the outer overcurrent arm are opposite, the supporting seat is electrically connected with the inner overcurrent arm, and the follow current arm is electrically connected with the outer overcurrent arm. Helping to reduce the central magnetic field strength.
Drawings
FIG. 1 is an exploded view of two oppositely disposed coiled longitudinal magnetic field contact assemblies of the present invention;
FIG. 2 is a schematic structural view of a coiled longitudinal magnetic field contact assembly of the present invention;
FIG. 3 is a schematic diagram of the current path of the coiled longitudinal magnetic field contact assembly of the present invention;
FIG. 4 is a schematic diagram of the current path of the contact base;
FIG. 5 is a schematic of the current path of the freewheeling contact pad;
FIG. 6 is a schematic current path of the support;
FIG. 7 is a comparison graph of magnetic field distribution of a coil-type longitudinal magnetic field contact assembly of the market mainstream and the coil-type longitudinal magnetic field contact assembly of the invention under the action of 50KA current;
FIG. 8 is a three-dimensional plot of the central magnetic field distribution produced by the coil-type longitudinal magnetic field contact assembly of the present invention under 80KA current;
in the drawings: 1. a conductive rod; 2. a contact base; 2-1, an outer flow passing arm; 2-2, an inner overflowing arm; 3. a supporting seat; 3-1, an upper conductive surface; 3-2, a lower conductive surface; 3-3, positioning an inclined plane; 4. a free-wheeling contact pad; 4-1, a current inlet boss; 4-2, a follow current arm; 4-3, a center ring; 4-4, positioning an inclined plane; 5. a contact pad plate; 6. copper-chromium contact.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The first embodiment of the coil-type longitudinal magnetic field contact assembly of the present invention, as shown in fig. 1 to 8, includes a conductive rod 1, a contact base 2, a support base 3, a freewheeling contact pad 4, a contact pad 5, and a copper-chromium contact 6.
Referring to fig. 4, the contact base 2 includes a central hole located at the center and fixedly connected to the conductive rod 1, and three bent overcurrent arms are uniformly arranged on the outer wall surface of the central hole at intervals, in other embodiments, two bent overcurrent arms are also arranged on the outer wall surface of the central hole, the overcurrent arms are bent to form two parts with opposite overcurrent directions, the directions of magnetic fields generated by the two opposite parts are opposite, and the magnetic field generated by the inner part is smaller than the magnetic field generated by the outer part, so as to reduce the magnetic field strength of the central region of the contact assembly. The bent overflowing arm comprises an inner overflowing arm 2-2 and an outer overflowing arm 2-1 which are arranged outwards along a central hole, the inner overflowing arm 2-2 is connected with the outer overflowing arm 2-1 in series, and the overflowing directions of the inner overflowing arm 2-2 and the outer overflowing arm 2-1 are opposite. One end of the inner overcurrent arm 2-2, which is far away from the end connected with the outer overcurrent arm 2-1, is fixedly connected with the outer wall surface of the central hole, and the part of the inner overcurrent arm 2-2 connected with the central hole is vertical to the conducting rod 1 inserted in the central hole. The connection part of the inner overcurrent arm 2-2 and the outer overcurrent arm 2-1 is vertical to the conducting rod 1 inserted in the central hole. The inner overcurrent arm 2-2 and the outer overcurrent arm 2-1 are both arc-shaped, and the central angle corresponding to the outer overcurrent arm 2-1 is larger than the central angle corresponding to the inner overcurrent arm 2-2, so that the reason for the design is that the longitudinal magnetic field intensity generated by the coil on the outer overcurrent arm 2-1 is larger than the longitudinal magnetic field intensity generated by the coil on the inner overcurrent arm 2-2. It can be seen from the current flow direction shown in fig. 3 that the outer current passing arm 2-1 generates a magnetic field perpendicular to the paper surface and going inwards, the inner current passing arm 2-2 generates a magnetic field perpendicular to the paper surface and going outwards, and the longitudinal magnetic field generated by the two arms in the central area of the contact base 2 is partially cancelled, so that the magnetic field strength in the central area of the contact assembly is reduced, the cathode spot concentration can be reduced, the phenomenon that the current density of an arc is too high in the central area is suppressed, and the local ablation degree of the contact is reduced. The specific size of the inner overcurrent arm 2-2 can be determined according to the inner diameter R1 of the inner overcurrent arm 2-2, the outer diameter R2 of the inner overcurrent arm 2-2 and the included angle theta of the inner overcurrent arm 2-2, and the value of magnetic field offset can be accurately controlled by adjusting the inner diameter R1 of the inner overcurrent arm 2-2, the outer diameter R2 of the inner overcurrent arm 2-2 and the included angle theta of the inner overcurrent arm 2-2, so that the contact base structure with the optimal breaking capacity can be found conveniently.
Referring to fig. 5, the freewheeling contact disc 4 includes a center ring 4-3, three freewheeling arms 4-2 extending outward along the center ring 4-3 are uniformly arranged on an outer wall surface of the center ring 4-3 at intervals, the freewheeling arms 4-2 are in an arc-shaped structure, the three arc-shaped freewheeling arms 4-2 are electrically connected with the three outer overcurrent arms 2-1 in a one-to-one correspondence manner, and of course, in other embodiments, if the number of the bent overcurrent arms is two, the number of the freewheeling arms is also two. The two ends of the arc follow current arm 4-2 are respectively provided with a current inlet boss 4-1 contacted with the outer overcurrent arm 2-1 and a current outlet boss contacted with the contact pad 5, and the current direction of the follow current arm 4-2 after the follow current contact disc 4 is electrified is the same as the current direction of the outer overcurrent arm 2-1.
The contact base 2 and the follow current contact disc 4 in this embodiment are both made of copper materials, and a support seat 3 is arranged between the contact base 2 and the follow current contact disc 4 in order to enhance the strength of the contact base 2 and the follow current contact disc 4. The supporting seat 3 is made of electrician pure iron to ensure that the supporting seat 3 has better mechanical strength, and meanwhile, the supporting seat 3 also has high magnetic permeability to ensure that the supporting seat has the magnetic gathering property. The supporting seat 3 in this embodiment is arc-shaped, and three supporting seats 3 are arranged along the central ring 4-3 to form an annular structure. As shown in fig. 6, the supporting base 3 is electrically connected to the inner overcurrent arm 2-2 of the contact base 2, the upper end of the supporting base 3 has an upper conductive surface 3-1 perpendicular to the inner overcurrent arm 2-2, the lower end surface has a lower conductive surface 3-2 perpendicular to the center ring 4-3, and both the upper conductive surface 3-1 and the lower conductive surface 3-2 are protruded to the outside of the supporting base 3. Because the areas of the upper conductive surface 3-1 and the lower conductive surface 3-2 are smaller, the contact resistance of the supporting seat 3, the contact base 2 and the follow current contact disc 4 is large, the shunt is small, the current is forced to flow along the arc-shaped supporting seat 3, the magnetic field generated by the shunt is longitudinal, and the longitudinal magnetic field intensity of the contact assembly is improved to the maximum extent. The center ring 4-3 is provided with three positioning inclined planes 4-4 which are used for being correspondingly matched with the three supporting seats 3 to realize positioning, the supporting seats 3 are provided with the positioning inclined planes 3-3 which are matched with the positioning inclined planes 4-4, and the corresponding positioning inclined planes arranged on the center ring and the bearing seat are beneficial to quickly assembling the supporting seats 3 on the follow current contact disc 4 on one hand and enhance the fixing strength of the supporting seats 3 on the follow current contact disc 4 on the other hand.
The contact pad 5 and the chrome copper contact 6, which are welded together in this embodiment, together form a contact blade.
When the coil type longitudinal magnetic field contact assembly is assembled, the conductive rod 1 and the contact base 2 are welded, the supporting seat 3 is welded with the follow current contact disc 4, and the contact base plate 5 is welded with the copper-chromium contact 6; then the support seat 3 and the follow current contact disc 4 which are welded into a whole are welded with the contact pad 5 and the copper-chromium contact 6 which are welded into a whole; and finally, welding the support seat 3 with the conductive rod 1 and the contact base 2 which are welded into a whole.
The distribution conditions of magnetic fields of a mainstream coil-type longitudinal magnetic field contact assembly in the market and the coil-type longitudinal magnetic field contact assembly in the market under the action of 50KA current are calculated by using numerical simulation software, as shown in fig. 7, the longitudinal magnetic field generated by the coil-type longitudinal magnetic field contact assembly is obviously improved compared with the longitudinal magnetic field generated by a mainstream coil-type longitudinal magnetic field contact assembly in the market, the longitudinal magnetic field intensity of a central area (with the diameter of about 45 mm) of the contact assembly is reduced compared with the longitudinal magnetic field intensity of the contact assembly outside the central area, and the magnetic field intensity reduction amplitude of the central area of the contact assembly is larger than that of the central area of the mainstream coil-type longitudinal magnetic field contact assembly in the market. The reason why the longitudinal magnetic field generated by the coil-type longitudinal magnetic field contact assembly is different from the longitudinal magnetic field generated by the main-flow coil-type longitudinal magnetic field contact assembly on the market is that the coil-type longitudinal magnetic field contact assembly remarkably improves the longitudinal magnetic field intensity of the contact assembly by arranging the double coils, and the longitudinal magnetic field in the central area of the contact assembly is reduced to a certain degree by arranging the outer overcurrent arm 2-1 and the inner overcurrent arm 2-2 on the contact base 2. Fig. 8 shows a three-dimensional diagram of the longitudinal magnetic field distribution generated by the coil-type longitudinal magnetic field contact assembly of the present invention under the action of 80KA current, which visually demonstrates the magnetic field distribution, i.e., the reduction of the magnetic field in the central region of the contact assembly, and which more visually demonstrates the beneficial effects of the coil-type longitudinal magnetic field contact assembly of the present invention.
The second embodiment of the coil-type longitudinal magnetic field contact assembly of the present invention is different from the first embodiment of the coil-type longitudinal magnetic field contact assembly in that the overcurrent arms on the contact base in this embodiment are unidirectional overcurrent arms, that is, the directions of currents flowing through the entire overcurrent arms are the same. The rest is the same as the first embodiment, and is not described again.
In a first specific embodiment of the vacuum arc-extinguishing chamber, the vacuum arc-extinguishing chamber includes two contact assemblies arranged at an interval, and the moving contact assembly and the fixed contact assembly are both coil-type longitudinal magnetic field contact assemblies.
The second embodiment of the vacuum arc-extinguishing chamber of the present invention is different from the first embodiment of the vacuum arc-extinguishing chamber in that only the moving contact assembly in the vacuum arc-extinguishing chamber in the present embodiment is the coil-type longitudinal magnetic field contact assembly, in other embodiments, only the stationary contact assembly in the vacuum arc-extinguishing chamber may be the coil-type longitudinal magnetic field contact assembly, and the others are the same as the first embodiment of the vacuum arc-extinguishing chamber and will not be described again.
Claims (6)
1. Coil type longitudinal magnetic field contact subassembly, including conducting rod and contact blade, fixedly connected with contact base and afterflow contact dish between conducting rod and the contact blade, be equipped with two at least arms that overflow on the contact base, be equipped with on the afterflow contact dish with overflow the afterflow arm that the arm one-to-one is connected, its characterized in that: the overcurrent protection device is characterized in that supporting seats in one-to-one correspondence with the overcurrent arms are arranged between the contact base and the follow current contact disc, the supporting seats are the same as the overcurrent directions of the corresponding follow current arms so that the follow current arms and the supporting seats form a parallel structure, the follow current contact disc comprises a center ring, the follow current arms are uniformly distributed on the outer wall surface of the center ring at intervals, the supporting seats are arc-shaped, the arc-shaped supporting seats are arranged at intervals along the circumferential direction of the center ring, the overcurrent arms are bent overcurrent arms, each bent overcurrent arm comprises an inner overcurrent arm and an outer overcurrent arm, the inner overcurrent arm and the outer overcurrent arm are arranged at intervals, the ends of the inner overcurrent arm and the outer overcurrent arm are connected, the overcurrent directions of the inner overcurrent arm and the outer overcurrent arm are opposite, the supporting seats are electrically connected with the inner.
2. The coiled longitudinal magnetic field contact assembly of claim 1, wherein: the supporting seat is provided with a connecting part which is vertical to the overflowing arm and the center ring.
3. The coiled longitudinal magnetic field contact assembly of claim 1, wherein: and positioning inclined planes for positioning and matching are correspondingly arranged on the central ring and the supporting seat.
4. Vacuum interrupter, including two contact assemblies of mutual disposition, at least one contact assembly is the vertical magnetic field contact assembly of coil-type, the vertical magnetic field contact assembly of coil-type includes conducting rod and contact piece, fixedly connected with contact base and afterflow contact dish between conducting rod and the contact piece, be equipped with two at least arms that overflow on the contact base, be equipped with on the afterflow contact dish and overflow the arm one-to-one and be connected its characterized in that with overflowing the afterflow arm that the arm one-to-one is connected: the overcurrent protection device is characterized in that supporting seats in one-to-one correspondence with the overcurrent arms are arranged between the contact base and the follow current contact disc, the supporting seats are the same as the overcurrent directions of the corresponding follow current arms so that the follow current arms and the supporting seats form a parallel structure, the follow current contact disc comprises a center ring, the follow current arms are uniformly distributed on the outer wall surface of the center ring at intervals, the supporting seats are arc-shaped, the arc-shaped supporting seats are arranged at intervals along the circumferential direction of the center ring, the overcurrent arms are bent overcurrent arms, each bent overcurrent arm comprises an inner overcurrent arm and an outer overcurrent arm, the inner overcurrent arm and the outer overcurrent arm are arranged at intervals, the ends of the inner overcurrent arm and the outer overcurrent arm are connected, the overcurrent directions of the inner overcurrent arm and the outer overcurrent arm are opposite, the supporting seats are electrically connected with the inner.
5. Vacuum interrupter according to claim 4, characterized in that: the supporting seat is provided with a connecting part which is vertical to the overflowing arm and the center ring.
6. Vacuum interrupter according to claim 4, characterized in that: and positioning inclined planes for positioning and matching are correspondingly arranged on the central ring and the supporting seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811320931.4A CN109308976B (en) | 2018-11-07 | 2018-11-07 | Coil type longitudinal magnetic field contact assembly and vacuum arc-extinguishing chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811320931.4A CN109308976B (en) | 2018-11-07 | 2018-11-07 | Coil type longitudinal magnetic field contact assembly and vacuum arc-extinguishing chamber |
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| Publication Number | Publication Date |
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| CN109308976A CN109308976A (en) | 2019-02-05 |
| CN109308976B true CN109308976B (en) | 2020-07-10 |
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| CN110085475B (en) * | 2019-05-14 | 2021-04-09 | 上海电力学院 | Double-coil contact structure of vacuum arc extinguish chamber in mechanical high-voltage direct-current circuit breaker |
| CN112509856B (en) * | 2020-09-25 | 2022-10-21 | 平高集团有限公司 | Contact coil for generating arc extinguishing magnetic field and vacuum arc extinguishing chamber contact structure |
| CN113053693B (en) * | 2021-03-22 | 2023-03-14 | 北京中磁新材科技有限公司 | External vacuum switch tube of bellows |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05334945A (en) * | 1991-04-12 | 1993-12-17 | Ngk Insulators Ltd | Electrode structure of switching device |
| JPH05190062A (en) * | 1992-01-16 | 1993-07-30 | Hitachi Ltd | Electrode for vacuum circuit-breaker |
| JP2861757B2 (en) * | 1992-11-10 | 1999-02-24 | 三菱電機株式会社 | Electrode device for vacuum valve |
| DE19957228B4 (en) * | 1999-11-27 | 2009-04-23 | Moeller Gmbh | Contact arrangement for a vacuum interrupter chamber |
| KR20130000677A (en) * | 2011-06-23 | 2013-01-03 | 엘에스산전 주식회사 | Contact assembly for vacuum interrupter |
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