CN113161194A - Contact structure system with end part cambered surface and vacuum arc-extinguishing chamber applying same - Google Patents
Contact structure system with end part cambered surface and vacuum arc-extinguishing chamber applying same Download PDFInfo
- Publication number
- CN113161194A CN113161194A CN202110363741.6A CN202110363741A CN113161194A CN 113161194 A CN113161194 A CN 113161194A CN 202110363741 A CN202110363741 A CN 202110363741A CN 113161194 A CN113161194 A CN 113161194A
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- China
- Prior art keywords
- cambered surface
- contact structure
- contact
- arc
- end part
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
- H01H33/666—Operating arrangements
Abstract
A contact structure system with end cambered surfaces and a vacuum arc-extinguishing chamber applied by the contact structure system comprise a contact structure combination with end cambered surfaces at the moving side and the static side and a permanent magnet combination outside the arc-extinguishing chamber; the contact structure combination with the end cambered surfaces on the moving side and the static side comprises a moving side conductive rod and a static side conductive rod, and a contact structure with the end cambered surfaces on the moving side and the static side which is respectively welded at one end of the moving side conductive rod and one end of the static side conductive rod; the contact structures of the cambered surfaces of the ends of the moving side belt and the static side belt are arranged oppositely; the combined magnetizing direction of the external permanent magnet is perpendicular to the long edge of the contact structure with the end part cambered surface. The direct-current vacuum arc extinguish chamber comprises the contact structure with the end part cambered surface, an I-shaped exposed shielding cover, a movable end ceramic shell and a static end ceramic shell; the invention realizes the directional movement of the vacuum arc cathode spot on the surface of the contact, and simultaneously can realize the further elongation of the arc column on the basis of the small volume of the arc extinguish chamber when the vacuum arc moves to the edge of the contact; the breaking of the vacuum direct current arc is facilitated.
Description
Technical Field
The invention belongs to the technical field of vacuum contactors and vacuum breaking, and particularly relates to a contact structure system with an end cambered surface and a vacuum arc-extinguishing chamber applied by the contact structure system.
Background
The vacuum contactor is important switch equipment for ensuring safe and reliable operation of a power grid. The vacuum arc-extinguishing chamber is a core device which is related to whether the vacuum contactor can successfully cut off the current.
The vacuum arc burnt in the vacuum arc-extinguishing chamber belongs to the arc burnt in the metal steam generated in the arc-burning process, and has the characteristic of low arc voltage, and the high arc voltage is considered to be helpful for the successful on-off of the current in the alternating current and direct current on-off. In particular, for the breaking of dc current in vacuum arc extinguishing chambers, a high arc voltage is the key to the generation of zero-crossing points of the current and is also a necessary condition for the direct successful breaking of the dc current in the arc extinguishing chamber.
At present, the mode of improving the arc voltage generally adopts a magnetic field control mode, and the arc voltage of the vacuum arc can be improved under the action of a transverse magnetic field. Through extensive experimentation, it has been found that the arc column motion steps and elongation are also a way to increase the arc voltage.
Disclosure of Invention
The invention aims to provide a contact structure system with an end part cambered surface and a vacuum arc-extinguishing chamber applied by the contact structure system, which utilize an externally applied transverse magnetic field to directionally control the motion direction of a vacuum arc, so that the arc moves to the end part cambered surface of a contact structure, further elongation of the vacuum arc in a limited volume and further improvement of arc-drawing speed are realized, thus the instability of the vacuum arc is increased, and high arc voltage is generated in the arc-burning process to force the zero passage of direct current.
The invention adopts the following technical scheme to realize the purpose:
a contact structure system with an end part cambered surface comprises a contact structure with an end part cambered surface and a permanent magnet combined structure 203 positioned outside the contact structure with the end part cambered surface, wherein the contact structure with the end part cambered surface comprises a contact combined structure 201 with an end part cambered surface on a static side and a contact combined structure 202 with an end part cambered surface on a moving side; the contact combined structure 201 with the end part cambered surface on the static side comprises a static side conducting rod 102 and a contact structure 104 with the end part cambered surface on the static side, wherein the contact structure 104 is welded at one end of the static side conducting rod 102; the contact combined structure 202 with the end part cambered surface on the moving side comprises a moving side conducting rod 107 and a contact structure 106 with the end part cambered surface on the moving side, which is welded at one end of the moving side conducting rod 107; the contact structure 104 with the end part cambered surface on the static side and the contact structure 106 with the end part cambered surface on the moving side are oppositely arranged; the permanent magnet combination structure 203 comprises a first pair of transverse permanent magnet combinations 111 and a second pair of transverse permanent magnet combinations 112 which are arranged in the gap between a contact structure 104 with an end cambered surface on the static side and a contact structure 106 with an end cambered surface on the dynamic side; the magnetizing directions of the first pair of transverse permanent magnet combinations 111 and the second pair of transverse permanent magnet combinations 112 are parallel to the contact surfaces of the contact structure 104 with the end cambered surface on the static side and the contact structure 106 with the end cambered surface on the moving side, and the magnetizing direction of the first pair of transverse permanent magnet combinations 111 is opposite to that of the second pair of transverse permanent magnet combinations 112; in the arc combustion process, the vacuum arc moves towards the arc surfaces at the two ends of the contact under the action of the permanent magnet combined structure 203, meanwhile, the arc length and the arc elongation speed are improved, the instability of the vacuum arc is improved, and the direct-current vacuum arc is favorably switched on and off.
The contact structure 104 with the end part cambered surface on the static side and the contact structure 106 with the end part cambered surface on the moving side are strip-shaped, and the end parts, namely the short sides, are arc surfaces.
A vacuum arc-extinguishing chamber comprises a contact structure system with an end part cambered surface, and a vacuum arc-extinguishing chamber static end cover plate 101 welded in the middle of a static side conducting rod 102; the bellows 109 of welding at movable side lead pole 107 middle part, the welding is kept away from the vacuum interrupter that moves the side and has contact structure 106 one end of tip cambered surface at movable side lead pole 107 and is moved end cover plate 110, the welding is at quiet end porcelain shell 103 of quiet end cover plate 101 one side of vacuum interrupter, the welding is at the end porcelain shell 108 that moves of vacuum interrupter move end cover plate 110 one side, the welding is at the I-shaped shield cover 105 that exposes between quiet end porcelain shell 103 and the end porcelain shell 108 that moves, permanent magnet integrated configuration 203 is fixed in the I-shaped shield cover 105 space that exposes.
The exposed I-shaped shielding cover 105 is made of a non-magnetic material.
The invention utilizes the externally applied transverse magnetic field to directionally control the movement direction of the vacuum electric arc, so that the electric arc moves to the end cambered surface of the contact structure, further elongation of the vacuum electric arc in a limited volume and further improvement of the arc-drawing speed are realized, thus increasing the instability of the vacuum electric arc, and generating high electric arc voltage to force the direct current to pass through zero in the arc-burning process.
Compared with the prior art, the invention has the following characteristics:
1. because of the action of the permanent magnet combination on the vacuum arc, the directional control on the movement of the vacuum arc is realized;
2. due to the structural design of the contact with the end cambered surface, the vacuum arc is further elongated in a limited space;
3. due to the structural design of the contact with the end cambered surface, the elongation speed of the vacuum arc is further improved;
4. the vacuum arc is converted into an unstable state under the action of a transverse magnetic field generated by the permanent magnet after moving to the end cambered surface, so that the arc voltage is increased, and the vacuum arc is switched on and off.
Drawings
FIG. 1 is a schematic view of a contact construction system with end arcs in accordance with the present invention.
Fig. 2 is a schematic view of a contact structure with an end arc according to the present invention.
Fig. 3 is a schematic view of an i-shaped exposed shielding case according to the present invention.
Fig. 4 is a cross-sectional view of a vacuum interrupter with a system of end-cambered contact structures in accordance with the present invention.
Fig. 5 is a perspective view of a vacuum interrupter with a contact structure system having end arcing surfaces in accordance with the present invention.
Detailed Description
The invention is further described with reference to the following drawings and specific embodiments.
FIG. 1 is a contact structure system with end arcs of the present invention, comprising a contact structure with end arcs and a permanent magnet composite structure 203 located outside the contact structure with end arcs, the contact structure with end arcs comprising a contact composite structure 201 with end arcs on the stationary side and a contact composite structure 202 with end arcs on the moving side; the contact combined structure 201 with the end part cambered surface on the static side comprises a static side conducting rod 102 and a contact structure 104 with the end part cambered surface on the static side, wherein the contact structure 104 is welded at one end of the static side conducting rod 102; the contact combined structure 202 with the end part cambered surface on the moving side comprises a moving side conducting rod 107 and a contact structure 106 with the end part cambered surface on the moving side, which is welded at one end of the moving side conducting rod 107; the contact structure 104 with the end part cambered surface on the static side and the contact structure 106 with the end part cambered surface on the moving side are oppositely arranged; the permanent magnet combination structure 203 comprises a first pair of transverse permanent magnet combinations 111 and a second pair of transverse permanent magnet combinations 112 which are arranged in the gap between a contact structure 104 with an end cambered surface on the static side and a contact structure 106 with an end cambered surface on the dynamic side; the magnetizing directions of the first pair of transverse permanent magnet combinations 111 and the second pair of transverse permanent magnet combinations 112 are parallel to the contact surfaces of the contact structure 104 with the end cambered surface on the static side and the contact structure 106 with the end cambered surface on the moving side, and the magnetizing direction of the first pair of transverse permanent magnet combinations 111 is opposite to that of the second pair of transverse permanent magnet combinations 112; in the arc combustion process, the vacuum arc moves towards the arc surfaces at the two ends of the contact under the action of the permanent magnet combined structure 203, meanwhile, the arc length and the arc elongation speed are improved, the instability of the vacuum arc is improved, and the direct-current vacuum arc is favorably switched on and off.
Fig. 2 is a schematic view of a contact structure with end arcs according to the present invention. As a preferred embodiment of the invention, the contact structure (104) with the cambered end on the static side and the contact structure (106) with the cambered end on the moving side are in a long strip shape.
Fig. 3 is a schematic view of an i-shaped exposed shielding cover according to the present invention. The metal shielding cover is an exposed metal shielding cover, is welded between a static end ceramic shell (103) and a moving end ceramic shell (108), and plays a role in vacuum sealing and fixing a permanent magnet combined structure (203).
As shown in fig. 4 and 5, the vacuum interrupter with the contact structure system having the end part arc surface according to the present invention includes the contact structure system having the end part arc surface, and a vacuum interrupter stationary end cover plate 101 welded to the middle of the stationary side conductive rod 102; the bellows 109 of welding at movable side lead pole 107 middle part, the welding is kept away from the vacuum interrupter that moves the side and has contact structure 106 one end of tip cambered surface at movable side lead pole 107 and is moved end cover plate 110, the welding is at quiet end porcelain shell 103 of quiet end cover plate 101 one side of vacuum interrupter, the welding is at the end porcelain shell 108 that moves of vacuum interrupter move end cover plate 110 one side, the welding is at the I-shaped shield cover 105 that exposes between quiet end porcelain shell 103 and the end porcelain shell 108 that moves, permanent magnet integrated configuration 203 is fixed in the I-shaped shield cover 105 space that exposes.
In the process of arc burning, the movement direction of the vacuum arc is directionally controlled by utilizing an externally applied transverse magnetic field, so that the arc moves to the end cambered surface of the contact structure, the further elongation of the vacuum arc in a limited volume and the further improvement of the arc drawing speed are realized, the instability of the vacuum arc is increased, and high arc voltage is generated in the process of arc burning to force the direct current to zero.
The above examples are merely illustrative of embodiments of the present invention, and the description is more specific, but not intended to limit the scope of the invention. It should be noted that various changes, modifications, substitutions and alterations can be made by those skilled in the art without departing from the principle and spirit of the invention, and the scope of the invention is to be determined by those skilled in the art.
Claims (4)
1. The utility model provides a contact structural system with tip cambered surface which characterized in that: the contact structure with the end part cambered surface comprises a contact structure with an end part cambered surface and a permanent magnet combined structure (203) positioned outside the contact structure with the end part cambered surface, wherein the contact structure with the end part cambered surface comprises a contact combined structure (201) with the end part cambered surface on a static side and a contact combined structure (202) with the end part cambered surface on a moving side; the contact combined structure (201) with the end part cambered surface on the static side comprises a static side conducting rod (102) and a contact structure (104) which is welded at one end of the static side conducting rod (102) and is provided with the end part cambered surface on the static side; the contact combined structure (202) with the end part cambered surface on the moving side comprises a moving side conducting rod (107), and a contact structure (106) with the end part cambered surface on the moving side, which is welded at one end of the moving side conducting rod (107); the contact structure (104) with the end part cambered surface on the static side and the contact structure (106) with the end part cambered surface on the moving side are oppositely arranged; the permanent magnet combination structure (203) comprises a first pair of transverse permanent magnet combinations (111) and a second pair of transverse permanent magnet combinations (112) which are placed in a gap between a contact structure (104) with an end cambered surface on a static side and a contact structure (106) with an end cambered surface on a dynamic side; the magnetizing directions of the first pair of transverse permanent magnet combinations (111) and the second pair of transverse permanent magnet combinations (112) are parallel to the contact surfaces of the contact structure (104) with the end cambered surface on the static side and the contact structure (106) with the end cambered surface on the moving side, and the magnetizing direction of the first pair of transverse permanent magnet combinations (111) is opposite to the magnetizing direction of the second pair of transverse permanent magnet combinations (112); in the arc combustion process, the vacuum arc moves towards the arc surfaces at the two ends of the contact under the action of the permanent magnet combined structure (203), meanwhile, the arc length and the arc elongation speed are improved, the instability of the vacuum arc is improved, and the direct-current vacuum arc is favorably switched on and off.
2. The contact structural system with end arcing of claim 1, wherein: the contact structure (104) with the end part cambered surface on the static side and the contact structure (106) with the end part cambered surface on the moving side are strip-shaped, and the end parts, namely the short sides, of the contact structures are cambered surfaces.
3. A vacuum interrupter which characterized in that: the contact structure system with the end cambered surface comprises the contact structure system with the end cambered surface as claimed in claim 1 or 2, and a vacuum arc extinguish chamber static end cover plate (101) welded in the middle of a static side conducting rod (102); the welding is at bellows (109) that move side conductor pole (107) middle part, and the welding is moved side conductor pole (107) and is kept away from the vacuum interrupter who moves side contact structure (106) one end that has the tip cambered surface and moves end cover board (110), and the welding is at quiet end porcelain shell (103) of quiet end cover board (101) one side of vacuum interrupter, and the welding is moved end porcelain shell (108) of vacuum interrupter moving end cover board (110) one side, and the welding is at quiet end porcelain shell (103) and moves the I shape shield cover (105) that exposes between end porcelain shell (108), permanent magnet integrated configuration (203) are fixed in the I shape and expose in shield cover (105) space.
4. A vacuum interrupter as claimed in claim 3, characterized in that: the exposed I-shaped shielding cover (105) is made of a non-magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110363741.6A CN113161194A (en) | 2021-04-02 | 2021-04-02 | Contact structure system with end part cambered surface and vacuum arc-extinguishing chamber applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110363741.6A CN113161194A (en) | 2021-04-02 | 2021-04-02 | Contact structure system with end part cambered surface and vacuum arc-extinguishing chamber applying same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113161194A true CN113161194A (en) | 2021-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110363741.6A Pending CN113161194A (en) | 2021-04-02 | 2021-04-02 | Contact structure system with end part cambered surface and vacuum arc-extinguishing chamber applying same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113161194A (en) |
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