CN103811224A - Vacuum arc-extinguishing chamber and electrode thereof as well as contact structure - Google Patents
Vacuum arc-extinguishing chamber and electrode thereof as well as contact structure Download PDFInfo
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- CN103811224A CN103811224A CN201410031507.3A CN201410031507A CN103811224A CN 103811224 A CN103811224 A CN 103811224A CN 201410031507 A CN201410031507 A CN 201410031507A CN 103811224 A CN103811224 A CN 103811224A
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Abstract
The invention relates to a vacuum arc-extinguishing chamber and an electrode thereof as well as the contact structure of the vacuum arc-extinguishing chamber. The contact structure comprises an composite contact cup consisting of an inner transverse magnetic contact cup and an outer longitudinal magnetic cup, wherein a contact blade is fixedly arranged on the rim of the composite contact cup, the rim edge of the inner transverse magnetic contact cup and the rim edge of the outer longitudinal magnetic cup are fixedly connected with the contact blade in a welded way, chutes with same oblique directions are arranged on the cup walls of the two contact cups peripherally, and a support piece for supporting the contact blade is arranged in the inner transverse magnetic contact cup. Under the premise that the diameter of the contact and the volume of the arc-extinguishing chamber are not increased, the conductive loop resistance and temperature rise of the vacuum arc-extinguishing chamber can be reduced, the rated current carrying capability of the vacuum switch contact can be improved, electric arc can be more effectively controlled, and the capacity of switching on or off the current and use life of the vacuum arc-extinguishing chamber can be improved.
Description
Technical field
The present invention relates to vacuum interrupter technical field.
Background technology
Vacuum interrupter is the core component of vacuum switch, it mainly comprises the parts such as insulation crust, galvanic circle and shielding harness, wherein, galvanic circle is made up of dynamic and static electrode, and dynamic and static electrode is made up of corresponding conducting rod and the contact being fixedly installed on conducting rod.Because contact is the position that produces electric arc and extinguish arcs, so the structure of contact has a great impact the ability of arc control device drop-out current, common structure of contact terminal mainly contains three kinds at present: the vertical magnetic structure of spiral flute type structure, band skewed slot cup-like structure and cup-shaped.
The vertical magnetic structure contact of cup-shaped is common in large current vacuum switch, it is mainly established the strutting piece for supports contacts sheet that is fixed on the contact blade on contact cup rim of a cup and be arranged in contact cup and is formed by contact cup, lid, on the perisporium of contact cup, be evenly equipped with skewed slot, contact blade is opened and is shaped with anti-vortex groove formation multi-petal shape shape along its radial direction, and contact blade and contact cup weld together by scolder.In application, dynamic and static contact adopts same structure, in circuit, conducting rod, contact cup and contact blade are connected in order, after circuit is connected, electric current flow through conducting rod, contact cup and contact blade, when electric current is flowed through two contact cups, produce and be parallel to the axial magnetic field of conducting rod in two contact gaps, be i.e. vertical magnetic field.Vertical magnetic field is played and is suppressed electric arc in contact surface random motion and prevent the effect that electric arc gathers, be conducive to extend the life-span of contact blade, but this structure still exists defects such as current path is long, galvanic circle resistance is large, contact resistance is large and temperature rise ratio is larger.
Summary of the invention
The object of this invention is to provide the vacuum arc-extinguishing chamber contact structure that a kind of galvanic circle resistance is little, temperature rise is low.The present invention simultaneously also provides the vacuum interrupter electrode and the vacuum interrupter that use this structure of contact terminal.
For achieving the above object, a kind of vacuum arc-extinguishing chamber contact structure of the present invention adopts following technical scheme: a kind of vacuum arc-extinguishing chamber contact structure, comprise the composite contact cup being formed by the inside and outside interior horizontal magnetic contact cup being set-located and outer vertical magnetic contact cup, on the rim of a cup of composite contact cup, be fixed with contact blade, the rim of a cup of the rim of a cup edge of interior horizontal magnetic contact cup and outer vertical magnetic contact cup is along being all connected with contact blade welding, on the wall of cup of two contact cups, along being circumferentially laid with oblique identical skewed slot, in interior horizontal magnetic contact cup, be equiped with the strutting piece of supports contacts sheet.
The rim of a cup end face of described two contact cups is concordant, and contact blade is saucer-like configuration, and the welding portion on the correspondence two contact rim of a cup edges of contact blade forms dish edge, caves in dish bottom point in cup.
Described interior horizontal magnetic contact cup is 3-16 circle structure, and outer vertical magnetic contact cup is 4-8 circle structure.
Described strutting piece is sheath structure.
A kind of vacuum interrupter electrode of the present invention adopts following technical scheme: a kind of vacuum interrupter electrode, comprise conducting rod and be fixedly installed on the contact on conducting rod, described contact comprises the composite contact cup being made up of the inside and outside interior horizontal magnetic contact cup being set-located and outer vertical magnetic contact cup, on the rim of a cup of composite contact cup, be fixed with contact blade, the rim of a cup of the rim of a cup edge of interior horizontal magnetic contact cup and outer vertical magnetic contact cup is along being all connected with contact blade welding, on the wall of cup of two contact cups, edge is circumferentially laid with oblique identical skewed slot, interior horizontal magnetic contact cup is installed on conducting rod, in interior horizontal magnetic contact cup, be equiped with the strutting piece of supports contacts sheet.
The rim of a cup end face of described two contact cups is concordant, and contact blade is saucer-like configuration, and the welding portion on the correspondence two contact rim of a cup edges of contact blade forms dish edge, caves in dish bottom point in cup.
Described interior horizontal magnetic contact cup and conducting rod are structure as a whole, and cup one end, the end of described outer vertical magnetic contact cup is weldingly fixed on conducting rod.
A kind of vacuum interrupter of the present invention adopts following technical scheme: a kind of vacuum interrupter, comprise insulation crust and moving, stationary electrode, moving electrode comprises moving conductive rod and is fixedly installed contact unit thereon, stationary electrode comprises static conductive rod and is fixedly installed the contact unit on it, described contact unit comprises the composite contact cup being made up of the inside and outside interior horizontal magnetic contact cup being set-located and outer vertical magnetic contact cup, on the rim of a cup of composite contact cup, be fixed with contact blade, the rim of a cup of the rim of a cup edge of interior horizontal magnetic contact cup and outer vertical magnetic contact cup is along being all connected with contact blade welding, on the wall of cup of inside and outside two contact cups, edge is circumferentially laid with oblique identical skewed slot, interior horizontal magnetic contact cup is installed on corresponding conducting rod, in interior horizontal magnetic contact cup, be equiped with the strutting piece of supports contacts sheet.
In described contact unit, the rim of a cup end face of inside and outside two contact cups is concordant, and contact blade is saucer-like configuration, and the welding portion on the inside and outside two contact rim of a cup edges of correspondence of contact blade forms dish edge, caves in dish bottom point in cup.
Described interior horizontal magnetic contact cup is structure as a whole with corresponding conducting rod, and cup one end, the end of described outer vertical magnetic contact cup is weldingly fixed on corresponding conducting rod.
The present invention adopts the outer composite contact cup structure that is nested and forms inside and outside interior horizontal magnetic contact cup and outer vertical magnetic contact cup, and electric current in the time that dynamic and static contact is connected can be shunted by inside and outside two contact cups simultaneously; In the time that dynamic and static contact separates, inside and outside two contact cups transverse magnetic and outer vertical magnetic field in dynamic and static contact gap produces thereby electric current is flowed through.Compared with the vacuum interrupter of indulging magnetic structure of contact terminal with existing cup-shaped, increase the cross-sectional area of current path, galvanic circle resistance ratio is lower, the compound electric arc that makes in transverse and longitudinal magnetic field relatively disperses, reduce the converge probability of ablation contact surface of electric arc, do not increasing under the prerequisite of contact diameter and arc control device volume, the present invention can reduce vacuum interrupter galvanic circle resistance and temperature rise, improve the logical loading capability of rated current of contacts of vacuum switch, simultaneously can more effective control electric arc, ability and the useful life of improving vacuum interrupter drop-out current.
Accompanying drawing explanation
Fig. 1 is the structural representation of the galvanic circle part in a kind of embodiment of vacuum interrupter of the present invention;
Fig. 2 is the structural representation that supports body in Fig. 1;
Fig. 3 is the structural representation of the vertical magnetic contact cup in Fig. 1 China and foreign countries;
Fig. 4 is the structural representation of interior horizontal magnetic contact cup in Fig. 1.
Embodiment
Vacuum interrupter of the present invention mainly comprises insulation crust, galvanic circle and shielding harness, assembly relation between them is same as the prior art, wherein, galvanic circle comprises dynamic and static electrode, the structure of two electrodes as Figure 1-4, moving electrode is made up of moving conductive rod 1 and the contact unit being fixedly installed on moving conductive rod, and stationary electrode is made up of static conductive rod 2 and the contact unit being fixedly installed on static conductive rod.
The contact body structure of above-mentioned two contact units is identical, only the contact unit on moving conductive rod 1 is described in detail below, this contact unit comprises the composite contact cup being made up of interior horizontal magnetic contact cup 3 together of inside and outside axial sleeve and outer vertical magnetic contact cup 5, and the rim of a cup end face of composite contact cup is made up of jointly the rim of a cup end face of inside and outside two contact cups; On the rim of a cup end face of composite contact cup, be fixed with a contact blade 8, the rim of a cup of the rim of a cup edge of interior horizontal magnetic contact cup 3 and outer vertical magnetic contact cup 5 is along being all connected with contact blade 8 welding, on the wall of cup of inside and outside two contact cups, edge is circumferentially evenly equipped with skewed slot, skewed slot on inside and outside wall of cup oblique identical, corresponding wall of cup is divided into some circles by each skewed slot, the number of the number of turn is selected according to actual needs, wherein, the number of turn of horizontal magnetic contact cup 3 can be any one in 3-16 circle, and the number of turn of outer vertical magnetic contact cup 5 can be any one in 4-8 circle; In interior horizontal magnetic contact cup, be also equiped with the strutting piece of supports contacts sheet 8.In the present embodiment, strutting piece adopts sheath structure, support the external diameter of body 7 and the internal diameter of interior horizontal magnetic contact cup 3 suitable, guarantee that support set physical efficiency is successfully assembled in interior horizontal magnetic contact cup, in the present embodiment, supporting between body and interior horizontal magnetic contact cup is matched in clearance, thereby can play supporting role better, axially contact blade is supported, the finger ring of radially internal horizontal magnetic contact cup plays positioning supports effect, can better prevent like this distortion of contact cup.The interior cup end of interior horizontal magnetic contact cup 3 is flat-bottom structures, supports body 7 and rests on this interior cup end.In the course of the work, in the time that two contact unit contacts, galvanic circle are connected, electric current enters inside and outside two contact cups by conducting rod, and inside and outside two contact cups current flowing simultaneously, has increased through-current capability; In the time that two contact units separate, between two contact units, existing transverse magnetic has again vertical magnetic field, thereby can effectively control electric arc.
In the present embodiment, the concordant setting of rim of a cup end face of inside and outside two contact cups, support the end face of body 7 lower than corresponding contact cup rim of a cup end face, contact blade 8 is middle concave, the protruding saucer-like configuration in edge, contact blade form dish edge with inside and outside two contact rims of a cup along relative welding portion, be protruding annular edge of part, dish bottom point is that intermediate recess part cave in and is resisted against on the end face of support body in cup.Like this in the time that the contact unit of dynamic and static electrode contacts, two contact blades only have dish to contact along part, the function of ring-type that this contact blade is integrated and fluting laminated structure contact blade, both can prevent that electric arc from burning in contact cup seat, can allow again electric arc along circular motion.The centre bore of offering on contact blade has two effects, and one is the fault in material causing while removing the melting of disk center, and another is to remove the wedge angle that the machine added-time stays.
In the present embodiment, interior horizontal magnetic contact cup is installed on corresponding conducting rod, wherein, the interior horizontal magnetic contact cup 3 being fixed in the contact unit on moving conductive rod 1 is structure as a whole with moving conductive rod 1, that is to say the structure that one end of moving conductive rod is directly processed into interior horizontal magnetic contact cup, the external diameter of this interior horizontal magnetic moving contact cup is greater than the external diameter of moving conductive rod 1, make interior horizontal magnetic contact cup have outer cup bottom face, cup one end, the end of the outer vertical magnetic contact cup 5 in this contact unit is sheathed and be weldingly fixed on moving conductive rod 1; The cup end that is fixed on the interior horizontal magnetic contact cup 4 in static conductive rod 2 upper contact head unit, has a glass neck, together with interior horizontal magnetic contact cup 4 is welded and fixed with static conductive rod 2 by its glass of neck, cup one end, the end of the outer vertical magnetic contact cup 6 in this contact unit is weldingly fixed on described cup neck.
The embodiment of vacuum interrupter electrode of the present invention is identical with moving electrode or stationary electrode structure in vacuum interrupter shown in above-mentioned Fig. 1-4, no longer repeats herein.
The embodiment of vacuum arc-extinguishing chamber contact structure of the present invention is identical with the structure of the contact unit in vacuum interrupter shown in above-mentioned Fig. 1-4, no longer repeats herein.
In the various embodiments described above, contact blade 8 can also adopt ring slice structure, the end face that now supports body 7 is concordant with composite contact cup rim of a cup end face, the inside edge of annular contact blade with support body support and coordinate, other position correspondences of annular contact blade are welded on interior horizontal magnetic contact cup rim of a cup edge and outer vertical magnetic contact cup rim of a cup along upper.Certainly, contact blade can also adopt the wafer body structure of band fluting.
In the various embodiments described above, the material of interior horizontal magnetic contact cup and outer vertical magnetic contact cup and contact blade, strutting piece is identical with prior art.The sheath structure of strutting piece can also adopt supporting disk of the prior art to substitute.In addition, the type of attachment of interior horizontal magnetic contact cup and conducting rod can adopt directly makes integrative-structure by both, also can adopt after the independent moulding of contact cup and conducting rod welded structure again.
Claims (10)
1. a vacuum arc-extinguishing chamber contact structure, it is characterized in that: comprise the composite contact cup being formed by the inside and outside interior horizontal magnetic contact cup being set-located and outer vertical magnetic contact cup, on the rim of a cup of composite contact cup, be fixed with contact blade, the rim of a cup of the rim of a cup edge of interior horizontal magnetic contact cup and outer vertical magnetic contact cup is along being all connected with contact blade welding, on the wall of cup of two contact cups, along being circumferentially laid with oblique identical skewed slot, in interior horizontal magnetic contact cup, be equiped with the strutting piece of supports contacts sheet.
2. vacuum arc-extinguishing chamber contact structure according to claim 1, it is characterized in that: the rim of a cup end face of described two contact cups is concordant, contact blade is saucer-like configuration, and the welding portion on the correspondence two contact rim of a cup edges of contact blade forms dish edge, caves in dish bottom point in cup.
3. vacuum arc-extinguishing chamber contact structure according to claim 1 and 2, is characterized in that: described interior horizontal magnetic contact cup is 3-16 circle structure, and outer vertical magnetic contact cup is 4-8 circle structure.
4. vacuum arc-extinguishing chamber contact structure according to claim 1 and 2, is characterized in that: described strutting piece is sheath structure.
5. a vacuum interrupter electrode, comprise conducting rod and be fixedly installed on the contact on conducting rod, it is characterized in that: described contact comprises the composite contact cup being made up of the inside and outside interior horizontal magnetic contact cup being set-located and outer vertical magnetic contact cup, on the rim of a cup of composite contact cup, be fixed with contact blade, the rim of a cup of the rim of a cup edge of interior horizontal magnetic contact cup and outer vertical magnetic contact cup is along being all connected with contact blade welding, on the wall of cup of two contact cups, edge is circumferentially laid with oblique identical skewed slot, interior horizontal magnetic contact cup is installed on conducting rod, in interior horizontal magnetic contact cup, be equiped with the strutting piece of supports contacts sheet.
6. vacuum interrupter electrode according to claim 5, is characterized in that: the rim of a cup end face of described two contact cups is concordant, and contact blade is saucer-like configuration, and the welding portion on the correspondence two contact rim of a cup edges of contact blade forms dish edge, caves in dish bottom point in cup.
7. according to the vacuum interrupter electrode described in claim 5 or 6, it is characterized in that: described interior horizontal magnetic contact cup and conducting rod are structure as a whole, cup one end, the end of described outer vertical magnetic contact cup is weldingly fixed on conducting rod.
8. a vacuum interrupter, comprise insulation crust and moving, stationary electrode, moving electrode comprises moving conductive rod and is fixedly installed contact unit thereon, stationary electrode comprises static conductive rod and is fixedly installed the contact unit on it, it is characterized in that: described contact unit comprises the composite contact cup being made up of the inside and outside interior horizontal magnetic contact cup being set-located and outer vertical magnetic contact cup, on the rim of a cup of composite contact cup, be fixed with contact blade, the rim of a cup of the rim of a cup edge of interior horizontal magnetic contact cup and outer vertical magnetic contact cup is along being all connected with contact blade welding, on the wall of cup of inside and outside two contact cups, edge is circumferentially laid with oblique identical skewed slot, interior horizontal magnetic contact cup is installed on corresponding conducting rod, in interior horizontal magnetic contact cup, be equiped with the strutting piece of supports contacts sheet.
9. vacuum interrupter according to claim 8, it is characterized in that: in described contact unit, the rim of a cup end face of inside and outside two contact cups is concordant, and contact blade is saucer-like configuration, the welding portion on the inside and outside two contact rim of a cup edges of correspondence of contact blade forms dish edge, caves in dish bottom point in cup.
10. vacuum interrupter according to claim 8 or claim 9, is characterized in that: described interior horizontal magnetic contact cup is structure as a whole with corresponding conducting rod, and a cup one end, the end for described outer vertical magnetic contact cup is weldingly fixed on corresponding conducting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410031507.3A CN103811224B (en) | 2014-01-23 | 2014-01-23 | Vacuum arc-extinguishing chamber and electrode thereof as well as contact structure |
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| CN201410031507.3A CN103811224B (en) | 2014-01-23 | 2014-01-23 | Vacuum arc-extinguishing chamber and electrode thereof as well as contact structure |
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| CN103811224A true CN103811224A (en) | 2014-05-21 |
| CN103811224B CN103811224B (en) | 2017-02-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021973A (en) * | 2014-06-24 | 2014-09-03 | 沈阳华德海泰电器有限公司 | Three-position switch for transferring current by quickly disconnecting bus |
| CN104269315A (en) * | 2014-09-05 | 2015-01-07 | 中国西电电气股份有限公司 | High-power switch with current limiter |
| CN108389753A (en) * | 2018-02-07 | 2018-08-10 | 西安交通大学 | A kind of novel cup-shaped vacuum arc-extinguishing chamber contact |
| CN113471012A (en) * | 2021-07-20 | 2021-10-01 | 四川大学 | Vacuum arc extinguish chamber |
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| CN203812799U (en) * | 2014-01-23 | 2014-09-03 | 天津平高智能电气有限公司 | Vacuum arc-extinguishing chamber, electrode and contact structure thereof |
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| DE4130230A1 (en) * | 1991-09-09 | 1993-03-11 | Slamecka Ernst | Vacuum switch contact system for high voltage network - has built in electromagnetic field generator coated around contact region with arc aperture in housing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021973A (en) * | 2014-06-24 | 2014-09-03 | 沈阳华德海泰电器有限公司 | Three-position switch for transferring current by quickly disconnecting bus |
| CN104269315A (en) * | 2014-09-05 | 2015-01-07 | 中国西电电气股份有限公司 | High-power switch with current limiter |
| CN108389753A (en) * | 2018-02-07 | 2018-08-10 | 西安交通大学 | A kind of novel cup-shaped vacuum arc-extinguishing chamber contact |
| CN108389753B (en) * | 2018-02-07 | 2020-03-31 | 西安交通大学 | Novel cup-shaped vacuum arc-extinguishing chamber contact |
| CN113471012A (en) * | 2021-07-20 | 2021-10-01 | 四川大学 | Vacuum arc extinguish chamber |
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| CN103811224B (en) | 2017-02-15 |
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Inventor after: Wang Xiaoqin Inventor after: Li Min Inventor after: Xu Xiaona Inventor after: Shu Xiaoping Inventor after: Li Wenyi Inventor after: Sun Shuping Inventor after: Yang Lansuo Inventor before: Wang Xiaoqin Inventor before: Li Min Inventor before: Shu Xiaoping Inventor before: Li Wenyi Inventor before: Sun Shuping Inventor before: Yang Lansuo |
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