CN203300539U - Contact for vacuum switch of longitudinal magnetic field - Google Patents
Contact for vacuum switch of longitudinal magnetic field Download PDFInfo
- Publication number
- CN203300539U CN203300539U CN2013203339776U CN201320333977U CN203300539U CN 203300539 U CN203300539 U CN 203300539U CN 2013203339776 U CN2013203339776 U CN 2013203339776U CN 201320333977 U CN201320333977 U CN 201320333977U CN 203300539 U CN203300539 U CN 203300539U
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- China
- Prior art keywords
- contact
- conducting rod
- contact blade
- shunting
- magnetic field
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The utility model relates to a contact for a vacuum switch of a longitudinal magnetic field. The contact comprises a conductive rod with an axis extending along the forward-backward direction; and a contact sheet is electrically connected to the front end of the conductive rod by a coil. Shunt conductive bodies that are used for conducting the contact sheet and the conductive rod when the contact and a corresponding adapted contact are in a closing state are arranged between the conductive rod and the contact sheet; and elastic elements that are used for forcing the shunt conductive bodies and the contact sheet and/or the conductive rod to be disconnected when the contact and the adapted contact are in an opening state are arranged between the conductive rod and the contact sheet. According to the contact, under the circumstances that diameters of the coil and the conductive rod are not increased, the contact has the high rated current carrying capability.
Description
Technical field
The utility model relates to a kind of vertical magnetic field vacuum switch contact.
Background technology
Existing vertical magnetic field vacuum switch is with the structure of contact as shown in Figure 1: comprise the conducting rod 12 that axis extends along fore-and-aft direction, the front end of conducting rod is electrically connected with contact blade 10 by the coil 11 of annular, on conducting rod, be provided with the supporting disk 9 for supports contacts sheet middle part, the rear and front end of supporting disk is welded and fixed with contact blade and conducting rod respectively.Wherein the material of contact blade is chromiumcopper, and the material of coil and conducting rod is oxygen-free copper, and the electric conductivity of contact blade, coil and conducting rod is good, and the material of supporting disk is the stainless steel that conductance is very low.In application, dynamic and static contact adopts same structure, electric current is through the conducting rod of a contact, coil, contact blade contact blade, coil and the conducting rod to another contact, electric current is when flowing through the coil of two contacts, in two contact gaps, produce and be parallel to the axial magnetic field of conducting rod, namely ，Zong magnetic field, vertical magnetic field is played the inhibition point camber line in the contact surface random motion and prevents the effect that electric arc gathers, and is conducive to extend the useful life of contact blade.But there is following shortcoming in existing this contact: 1, structural strength is poor, supporting disk must be set and come contact blade is supported, and has increased the complex structure degree of contact; 2, current path is long, loop resistance is large, rated current can not be too large, it is specified that to cut-off short circuit current restricted, the logical loading capability of rated current that increases contact by the mode that increases coil and conducting rod diameter is also arranged in prior art, this must increase the volume of arc control device and whole vacuum switch, has not only increased the cost of manufacture of product, also is unfavorable for the miniaturization development of product.
The utility model content
The purpose of this utility model is to provide a kind of not to be increased in the diameter situation of coil and conducting rod, has the vertical magnetic field vacuum switch contact of the logical loading capability of larger rated current.
In order to address the above problem, the technical solution of the utility model is:
A kind of vertical magnetic field vacuum switch contact, comprise the conducting rod that axis extends along fore-and-aft direction, the front end of conducting rod is electrically connected with contact blade by coil, between described conducting rod and contact blade, be provided for the shunting electric conductor of the described contact blade of conducting and conducting rod when described contact and corresponding adaptive contact close a floodgate, between described conducting rod and contact blade, also be provided with at described contact, forcing described shunting electric conductor with contact blade and/or conducting rod, to separate the elastic component of disconnection during with adaptive contact separating brake.
Described shunting electric conductor comprises the shunting conductive pole that is fixedly arranged on described contact blade or conducting rod, described elastic component comprises the spring that is mounted between described contact blade and conducting rod, and the axial height of described spring under free state is greater than the height of described shunting conductive pole on fore-and-aft direction.
The front end of described spring is fixedly arranged on contact blade, and the rear end of described spring is fixedly arranged on conducting rod.
Described spring fairlead is loaded on the periphery of described shunting lead.
Described conducting rod comprise the conducting rod body and be fixedly arranged on described conducting rod body front end, with the supporting disk that described spring rear end face bracketing coordinates, described shunting conductive pole is fixedly arranged on described supporting disk.
The beneficial effects of the utility model are: when closing a floodgate, contact blade, coil and conducting rod form the first current path, contact blade, shunting electric conductor and conducting rod form second current path in parallel with the first current path, the second current path has played shunting action, make the more than flowing through coil of electric current, thereby reach in the situation that do not increase coil and conducting rod diameter, the purpose of the logical loading capability of increase contact rated current; When separating brake; elastic component forces shunting electric conductor and contact blade and/or conducting rod to disconnect, thereby disconnects the second current path, thereby electric flowing through coil produces longitudinal magnetic field at contact in intermittence; prevent that electric arc from gathering, reach the purpose of regulation and control arc shape, protection contact blade.
The accompanying drawing explanation
Fig. 1 is the structural representation of background technology in the utility model;
Fig. 2 is the structural representation of an embodiment of the present utility model;
Fig. 3 is the I place enlarged diagram in Fig. 2;
Fig. 4 is Fig. 2 and the structural representation of adaptive contact when closing a floodgate;
Fig. 5 is the enlarged diagram at II place in Fig. 4;
Fig. 6 is Fig. 2 and the structural representation of adaptive contact when separating brake;
Fig. 7 is the enlarged diagram at III place in Fig. 2.
Embodiment
A kind of vertical magnetic field vacuum switch with the embodiment of contact as shown in Fig. 2 ~ 7: comprise the conducting rod 6 that axis extends along fore-and-aft direction, the front end of conducting rod is electrically connected with contact blade 1 by coil 5, on conducting rod, be provided with corresponding shaft shoulder structure, the two ends of coil are connected with contact blade and conducting rod welding respectively, contact blade adopts the chromiumcopper material, and coil, conducting rod all adopt the oxygenless copper material that conducts electricity very well.Conducting rod comprises the conducting rod body and is fixedly arranged on the supporting disk 4 of conducting rod body front end, on supporting disk, be installed with a plurality of shunting conductive poles 2 for conducting contact blade and conducting rod when contact and adaptive contact close a floodgate, in periphery of each shunting conductive pole, all be set with at contact, forcing the corresponding spring 3 of shunting conductive pole and contact blade disconnection during with adaptive contact separating brake, the front end of spring and contact blade welding are connected, the rear end of spring and supporting disk welding are connected, and the axial height of spring under free state is greater than the height of shunting conductive pole on fore-and-aft direction.The material of shunting conductive pole and supporting disk also is oxygen-free copper, and the resistance of spring is greater than the resistance of shunting conductive pole and coil, and spring can adopt the stainless steel material of poor electric conductivity.
During concrete the use, the structure of adaptive contact 8 is identical with this contact 7, at contact and adaptive contact, close a floodgate while contacting, the effect of contact extruding force makes coil and spring stress compression, thereby the gap between contact blade and shunting conductive pole is disappeared, shunting electric conductor conductive contact sheet and conducting rod, the second current path that contact blade, shunting electric conductor and conducting rod are formed for shunting, contact blade, coil and conducting rod form first current path in parallel with the second current path, article two, circuit is relation in parallel, jointly shares circuital current.But compare coil, the contact area of shunting electric conductor and contact blade is larger, electric conductor is identical with the coil electric conductivity to be arranged in the better situation of electric conductivity shunting, the resistance of shunting conductive pole place circuit is less, thereby make most of rated current cross arc control device along shunting conductive pole place circuit flow, this part electric current also becomes short circuit current, and the second current path can carry larger electric current, thereby has reached the purpose that increases the logical loading capability of rated current.In contact and adaptive contact separating brake process; the extruding force that acts on two contacts disappears; coil and talk return to natural length; under the support and the strong electrodynamic effect of short circuit current of spring; contact blade separates disconnection with the shunting electric conductor; make the second current path disconnect; this moment, spring stress stretched; moderate finite deformation occurs in limiting coil under electrodynamic action; thereby played the effect of protection coil; the shunting conductive pole is arranged in the inside of corresponding spring, has played the effect to the spring guiding.This moment, to only have the first current path be path, and the electric flowing through coil arc control device of flowing through, produce longitudinal magnetic fields in two contact gaps, prevents that electric arc from gathering, and reaches the purpose of regulation and control arc shape, protection contact blade, improved its short circuit interruption ability.
In other embodiment of the present utility model: the shunting conductive pole can also be replaced by the shunting electric conductor of slab structure or other shape and structure; Spring also can not be set in the periphery of shunting conductive pole, but by the periphery of layout of spring in the shunting conductive pole, need to arrange separately lead this moment at spring inner; Certainly the shunting conductive pole can also be fixedly arranged on contact blade, or between the rear and front end of shunting conductive pole and contact blade and conducting rod top shock mount respectively, shunt the conductive pole floating assembly between contact blade and conducting rod; The number of shunting conductive pole and spring can also suitably be selected as required; The material of spring is not limited to stainless steel, the material of coil and shunting conductive pole also is not limited to oxygen-free copper, as long as the resistance that makes spring is greater than the resistance of coil and shunting electric conductor, to guarantee that the second current path is disconnected or is got final product by the first current path short circuit when the separating brake; Spring also can be replaced by other elastic component with axial elasticity deflection.
Claims (5)
1. vertical magnetic field vacuum switch contact, comprise the conducting rod that axis extends along fore-and-aft direction, the front end of conducting rod is electrically connected with contact blade by coil, it is characterized in that: between described conducting rod and contact blade, be provided for the shunting electric conductor of the described contact blade of conducting and conducting rod when described contact and corresponding adaptive contact close a floodgate, between described conducting rod and contact blade, also be provided with at described contact, forcing described shunting electric conductor with contact blade and/or conducting rod, to separate the elastic component of disconnection during with adaptive contact separating brake.
2. vertical magnetic field according to claim 1 vacuum switch contact, it is characterized in that: described shunting electric conductor comprises the shunting conductive pole that is fixedly arranged on described contact blade or conducting rod, described elastic component comprises the spring that is mounted between described contact blade and conducting rod, and the axial height of described spring under free state is greater than the height of described shunting conductive pole on fore-and-aft direction.
3. vertical magnetic field according to claim 2 vacuum switch contact, it is characterized in that: the front end of described spring is fixedly arranged on contact blade, and the rear end of described spring is fixedly arranged on conducting rod.
4. vertical magnetic field according to claim 2 vacuum switch contact, it is characterized in that: described spring fairlead is loaded on the periphery of described shunting lead.
5. according to claim 2 ~ 4 described vertical magnetic field of any one vacuum switch contacts, it is characterized in that: described conducting rod comprise the conducting rod body and be fixedly arranged on described conducting rod body front end, with the supporting disk that described spring rear end face bracketing coordinates, described shunting conductive pole is fixedly arranged on described supporting disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203339776U CN203300539U (en) | 2013-06-09 | 2013-06-09 | Contact for vacuum switch of longitudinal magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203339776U CN203300539U (en) | 2013-06-09 | 2013-06-09 | Contact for vacuum switch of longitudinal magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203300539U true CN203300539U (en) | 2013-11-20 |
Family
ID=49576533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203339776U Expired - Lifetime CN203300539U (en) | 2013-06-09 | 2013-06-09 | Contact for vacuum switch of longitudinal magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203300539U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295831A (en) * | 2013-06-09 | 2013-09-11 | 国家电网公司 | Contact for vacuum switch of longitudinal magnetic field |
-
2013
- 2013-06-09 CN CN2013203339776U patent/CN203300539U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295831A (en) * | 2013-06-09 | 2013-09-11 | 国家电网公司 | Contact for vacuum switch of longitudinal magnetic field |
| CN103295831B (en) * | 2013-06-09 | 2016-05-04 | 国家电网公司 | A kind of vertical magnetic field vacuum switch contact |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131120 |