CN111564334A - Contact device of vacuum arc-extinguishing chamber - Google Patents
Contact device of vacuum arc-extinguishing chamber Download PDFInfo
- Publication number
- CN111564334A CN111564334A CN202010390247.4A CN202010390247A CN111564334A CN 111564334 A CN111564334 A CN 111564334A CN 202010390247 A CN202010390247 A CN 202010390247A CN 111564334 A CN111564334 A CN 111564334A
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- CN
- China
- Prior art keywords
- contact
- seat
- bottom wall
- connecting piece
- piece
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The application relates to a contact device of a vacuum arc extinguish chamber, and belongs to the technical field of medium and high voltage vacuum switches. The contact element comprises a contact seat and a contact blade, wherein the upper edge of the contact seat is connected with the contact blade, the contact element further comprises a supporting piece and a connecting piece, one end of the connecting piece is connected with the bottom wall of the contact seat, the other end of the connecting piece is connected with one end of the supporting piece in a sliding mode, and the other end of the supporting piece is connected with the contact blade. This application increases support piece and connecting piece between contact seat bottom and contact blade, reasonable in design, simple and practical has effectively shortened the spring time between the contact when closing a floodgate, has reduced the range of bouncing, reduces the production of contact fusion welding phenomenon, and contact receives fusion welding power and easy deformation problem when still having solved the separating brake.
Description
Technical Field
The application belongs to the field of medium and high voltage vacuum switches, and particularly relates to a contact device of a vacuum arc extinguish chamber.
Background
The vacuum switch is a key device in the field of power transmission and distribution, and about 95 percent of switch devices in a medium-voltage distribution grade power system in China adopt the vacuum switch. The vacuum arc-extinguishing chamber is a core component of the vacuum switch, and the contact is the heart of the vacuum arc-extinguishing chamber, so the structure of the contact has great influence on the performance of the vacuum arc-extinguishing chamber. When the vacuum arc extinguish chamber is switched on, a switching-on driving force generated when the moving contact and the static contact are contacted causes a bouncing phenomenon between the moving contact and the static contact, and because the distance between the moving contact and the static contact is small, a contact gap is punctured, current flows along a puncturing channel, large joule heat is generated on the contact, and the surface of the contact is locally melted. The melted regions will bond together under the contact pressure and solidify after the temperature is reduced, and fusion welding of the contact surfaces will occur. When the vacuum arc-extinguishing chamber is opened, the moving contact and the static contact which are welded together are deformed under the stretching of the opening force, and the contacts are cracked or can not be opened when the contact is serious.
CN103915284A discloses a contact seat damping structure, including the strengthening rib, strengthening rib one end welding drags on positive seat structure contact seat or anti-seat structure cup, and its other end activity card goes into the stationary ring portion, and when the contact contacted, outside expansion behind the strengthening rib one end atress, the partial effort of expansion in-process consumption has effectively reduced the range of bouncing and the bounce time between the contact, but the strengthening rib belongs to elastic material, and elasticity can diminish or even appear plastic deformation when reaching life, influences the normal life of contact seat.
Disclosure of Invention
The application provides a vacuum arc extinguish chamber contact device, which aims to solve the problems of bounce, fusion welding, contact deformation and the like generated in the switching-on and switching-off processes of the existing vacuum arc extinguish chamber contact device.
The technical scheme adopted by the application is as follows: the utility model provides a vacuum interrupter contact device, including contact seat and contact piece, the contact seat go up along with the contact piece is connected, still includes support piece and connecting piece, connecting piece one end with the contact seat diapire is connected, the other end of connecting piece with support piece one end sliding connection, support piece's the other end with the contact piece is connected.
The contact seat is cup-shaped and is provided with an inner cavity, the open end of the inner cavity is the upper edge of the contact seat, and the bottom surface of the inner cavity is the bottom wall of the contact seat.
Furthermore, a plurality of convex teeth are arranged along the inner peripheral direction of one end of the connecting piece close to the bottom wall of the contact seat, and a first flange is arranged along the outer peripheral direction of one end of the connecting piece far away from the bottom wall of the contact seat.
The contact seat diapire is provided with the recess, set up the fixed column in the recess, follow the fixed column just keeps away from the peripheral direction of the one end of the diapire of recess sets up a plurality of fixed stations.
Furthermore, an inner circular disc is arranged along the inner peripheral direction of one end of the supporting piece close to the bottom wall of the contact seat, one end of the inner circular disc is sleeved with one end of the connecting piece provided with the first flange, and the supporting piece can slide along the outer wall of the connecting piece.
Furthermore, a second flange is arranged along the peripheral direction of one end of the supporting piece, which is far away from the bottom wall of the contact seat, and the contact blade is provided with an annular groove which is spliced with the second flange.
Furthermore, the distance between the inner circular ring disc and the bottom wall of the contact seat is 0.5mm-1mm, and the distance between the inner circular ring disc and the first flange is 0.5mm-2 mm.
Further, the support member is not necessarily sleeved outside the connecting member, and the connecting member may be sleeved outside the support member.
The technical scheme of the application has the following beneficial effects:
according to the contact device of the vacuum arc extinguish chamber, when the vacuum arc extinguish chamber is switched on, namely, a moving contact and a fixed contact are contacted, the contact blade is subjected to a switching-on driving force, so that the supporting piece connected with the contact blade moves towards the bottom wall of the contact seat along the outer wall of the connecting piece until an inner ring disc of the supporting piece is contacted with the bottom wall of the contact seat, the switching-on impact force part of the contact is converted into kinetic energy of the supporting piece and the contact blade sliding along the outer wall of the connecting piece in the process, the switching-on impact force is effectively consumed, the bounce amplitude and bounce time between the contacts during switching-on are shortened, and the phenomena of heating; on the other hand, the supporting piece can support the contact seat in the switching-on bouncing process, so that the contact seat is prevented from being extruded by unconsumed energy to deform and even directly crack.
When the vacuum arc extinguish chamber is opened, namely the moving contact and the static contact are separated, particularly when fusion welding bonding occurs between the moving contact and the static contact, the supporting piece moves along the connecting piece in the direction consistent with the opening force, the sliding distance of the supporting piece is limited within a certain range by the arrangement of the first flange, the phenomenon that the contact base is excessively stretched and deformed due to the fact that kinetic energy generated when the supporting piece slides is too large is avoided, the opening and closing current capacity of the vacuum arc extinguish chamber is effectively prolonged, and the service life of the vacuum arc extinguish chamber is effectively prolonged.
This application reasonable in design, simple and practical through set up support piece and connecting piece between contact seat and contact piece, has effectively shortened the spring time between the contact when closing a floodgate, has reduced the range of bouncing, reduces the production of contact fusion welding phenomenon, and contact receives fusion welding power and produces the deformation problem when still having solved the separating brake.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a front sectional view of a vacuum interrupter contact arrangement of the present application;
fig. 2 is a front sectional view of the connector 4 of the present application;
FIG. 3 is a top view of the connector 4 of the present application;
FIG. 4 is an elevational, cross-sectional view of the contact block 1 of the present application;
FIG. 5 is a top view of the contact block 1 of the present application;
FIG. 6 is a front sectional view of the support 3 of the present application;
illustration of the drawings:
the contact structure comprises a contact seat 1, a contact blade 2, a supporting piece 3, a connecting piece 4, a fixing column 11, a fixing table 12, an inner circular ring disc 31, a second flange 32, a convex tooth 41 and a first flange 42.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
Referring to fig. 1, the contact device of a vacuum interrupter is shown in a front sectional view, and includes a contact block 1, a support member 3, and a connecting member 4, wherein the upper edge of the contact block 1 is connected to a contact blade 2, one end of the connecting member 4 is connected to the bottom wall of the contact block 1, the other end of the connecting member 4 is slidably connected to one end of the support member 3, and the other end of the support member 3 is connected to the contact blade 2.
The contact seat 1 is cup-shaped and is provided with an inner cavity, the open end of the inner cavity is the upper edge of the contact seat 1, and the bottom surface of the inner cavity is the bottom wall of the contact seat 1.
Referring to fig. 2 and 3, a plurality of convex teeth 41 are arranged along the inner circumferential direction of the connecting member 4 and near one end of the bottom wall of the contact block 1, and a first flange 42 is arranged along the outer circumferential direction of the connecting member 4 and far from one end of the bottom wall of the contact block 1.
Referring to fig. 4 and 5, a groove is formed in the bottom wall of the contact seat 1, a fixing column 11 is arranged in the groove, and a plurality of fixing tables 12 are arranged along the fixing column 11 and in the peripheral direction of one end of the bottom wall far away from the groove. The connecting piece 4 is sleeved outside the fixing column 11 at one end provided with the convex tooth 41, and the connecting piece 4 is rotated to enable the convex tooth 41 to be opposite to the fixing table 12 arranged on the fixing column 11 up and down, so that the clamping connection of the connecting piece 4 and the fixing column 11 is realized.
The shape of the fixing table 12 of the present embodiment is a rectangular parallelepiped, and certainly, the fixing table can also be a U-shape or an L-shape, which is not described herein.
Referring to fig. 6, an inner circular disc 31 is disposed along the inner circumferential direction of the support 3 and near one end of the bottom wall of the contact holder 1, and in order to achieve the effect that the device of the present application can move freely and has no jamming phenomenon at the opening and closing moment of the vacuum interrupter, the inner diameter of the inner circular disc 31 should be smaller than the outer diameter of the first flange 42. The end of the supporting member 3 provided with the inner circular disc 31 is sleeved with the end of the connecting member 4 provided with the first flange 42, and the supporting member 3 can slide along the outer wall of the connecting member 4.
A second flange 32 is provided along the peripheral direction of the end of the support member 3 remote from the bottom wall of the contact block 1.
The contact blade 2 is provided with an annular groove which is plugged into the second flange 32, the height of the annular groove is less than the height of the contact blade 2, and the annular width of the annular groove is equal to the annular width of the second flange 32.
The distance between the inner circular disc 31 and the bottom wall of the contact seat 1 is 0.5mm-1mm, when the vacuum arc-extinguishing chamber is switched on, the contact blade 2 and the support piece 3 move to the bottom wall of the contact seat 1 under the switching-on impact force, and the moving stroke is the distance between the inner circular disc 31 and the bottom wall of the contact seat 1. If the moving distance is less than 0.5mm, the closing impact force cannot be effectively consumed, and the effect of the support piece 3 cannot be exerted; and the processing cost is increased when the set moving distance is more than 1mm because the space of the inner cavity of the contact seat 1 is limited.
The distance between the inner circular disc 31 and the first flange 42 is 0.5mm-2mm, when the vacuum arc-extinguishing chamber is opened, the inner circular disc 31 moves along the outer wall of the support 4 in the direction consistent with the closing direction, and the moving stroke is the distance between the inner circular disc 31 and the first flange 42. If the moving distance is less than 0.5mm, the opening force cannot be effectively consumed, and if the remaining opening force is too large, the support member 3 is pulled and the first flange 41 is linked to stretch the fixing column 11 of the contact seat 1, so that the deformation of the fixing column 11 is caused; the processing cost is increased when the moving distance is more than 2mm because the space of the inner cavity of the contact seat 1 is limited.
The support member 3 is not necessarily sleeved outside the connecting member 4, and the connecting member 4 is sleeved outside the support member 3, so that the sliding connection between the support member 3 and the connecting member 4 can still be realized.
According to the contact device of the vacuum arc extinguish chamber, when the vacuum arc extinguish chamber is switched on, namely, a moving contact and a fixed contact are contacted, the contact blade is subjected to a switching-on driving force, so that the supporting piece connected with the contact blade moves towards the bottom wall of the contact seat along the outer wall of the connecting piece until an inner ring disc of the supporting piece is contacted with the bottom wall of the contact seat, the switching-on impact force part of the contact is converted into kinetic energy of the supporting piece and the contact blade sliding along the outer wall of the connecting piece in the process, the switching-on impact force is effectively consumed, the bounce amplitude and bounce time between the contacts during switching-on are shortened, and the phenomena of heating; on the other hand, the supporting piece can support the contact seat in the switching-on bouncing process, so that the contact seat is prevented from being extruded by unconsumed energy to deform and even directly crack.
When the vacuum arc extinguish chamber is opened, namely the moving contact and the static contact are separated, particularly when fusion welding bonding occurs between the moving contact and the static contact, the supporting piece moves along the connecting piece in the direction consistent with the opening force and consumes part of energy, and the arrangement of the first flange limits the sliding distance of the supporting piece within a certain range, so that the phenomenon that the contact base is excessively stretched to cause deformation due to overlarge kinetic energy generated when the supporting piece slides is avoided, and the opening and closing current capacity and the service life of the vacuum arc extinguish chamber are effectively prolonged.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (6)
1. The utility model provides a vacuum interrupter contact device, includes contact seat (1) and contact blade (2), along on contact seat (1) with contact blade (2) are connected its characterized in that: the contact element holder is characterized by further comprising a supporting piece (3) and a connecting piece (4), one end of the connecting piece (4) is connected with the bottom wall of the contact element holder (1), the other end of the connecting piece (4) is connected with one end of the supporting piece (3) in a sliding mode, and the other end of the supporting piece (3) is connected with the contact element (2).
2. A vacuum interrupter contact arrangement as claimed in claim 1, characterized in that: a plurality of convex teeth (41) are arranged along the inner peripheral direction of one end of the connecting piece (4) close to the bottom wall of the contact seat (1), and a first flange (42) is arranged along the outer peripheral direction of one end of the connecting piece (4) far away from the bottom wall of the contact seat (1); the contact seat (1) bottom wall is provided with a groove, a fixing column (11) is arranged in the groove, and a plurality of fixing platforms (12) are arranged along the fixing column (11) and in the peripheral direction of one end of the bottom wall far away from the groove.
3. A vacuum interrupter contact arrangement as claimed in claim 1, characterized in that: an inner circular disc (31) is arranged along the supporting piece (3) and close to the inner peripheral direction of one end of the bottom wall of the contact seat (1), and the inner circular disc (31) is sleeved with the first flange (42) so that the supporting piece (3) can slide along the outer wall of the connecting piece (4).
4. A vacuum interrupter contact arrangement as claimed in claim 1, characterized in that: a second flange (32) is arranged along the peripheral direction of one end of the supporting piece (3) far away from the bottom wall of the contact seat (1), and the contact blade (2) is provided with an annular groove inserted with the second flange (32).
5. A vacuum interrupter contact arrangement as claimed in claim 3, characterized in that: the distance between the inner circular ring disc (31) and the bottom wall of the contact seat (1) is 0.5mm-1 mm.
6. A vacuum interrupter contact arrangement as claimed in claim 3, characterized in that: the distance between the inner circular disc (31) and the first flange (42) is 0.5mm-2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010390247.4A CN111564334A (en) | 2020-05-09 | 2020-05-09 | Contact device of vacuum arc-extinguishing chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010390247.4A CN111564334A (en) | 2020-05-09 | 2020-05-09 | Contact device of vacuum arc-extinguishing chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111564334A true CN111564334A (en) | 2020-08-21 |
Family
ID=72074630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010390247.4A Pending CN111564334A (en) | 2020-05-09 | 2020-05-09 | Contact device of vacuum arc-extinguishing chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111564334A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116453902A (en) * | 2023-06-13 | 2023-07-18 | 成都旭光电子股份有限公司 | Novel vacuum interrupter contact structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140837A (en) * | 2006-09-07 | 2008-03-12 | 开关工艺欧洲有限公司 | Middle and high voltage vacuum circuit breaker |
| CN201518291U (en) * | 2009-10-29 | 2010-06-30 | 中国振华电子集团宇光电工有限公司 | Vacuum arc extinction chamber contact with supporting device |
| CN202650967U (en) * | 2012-07-12 | 2013-01-02 | 中国振华电子集团宇光电工有限公司（国营第七七一厂） | Novel contact base of vacuum interrupter with shock absorption device |
| CN202712042U (en) * | 2012-07-12 | 2013-01-30 | 中国振华电子集团宇光电工有限公司（国营第七七一厂） | Means of connecting reinforcing ribs and hooks for contacts in vacuum arc-extinguishing chamber |
| CN103915284A (en) * | 2014-04-10 | 2014-07-09 | 中国振华电子集团宇光电工有限公司（国营第七七一厂） | Contact seat damping structure |
| CN208738131U (en) * | 2018-05-21 | 2019-04-12 | 中国振华电子集团宇光电工有限公司（国营第七七一厂） | A kind of vacuum arc-extinguishing chamber contact system structure |
-
2020
- 2020-05-09 CN CN202010390247.4A patent/CN111564334A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140837A (en) * | 2006-09-07 | 2008-03-12 | 开关工艺欧洲有限公司 | Middle and high voltage vacuum circuit breaker |
| US20100025375A1 (en) * | 2006-09-07 | 2010-02-04 | Klaus Bodenstein | Vacuum Circuit Breaker |
| CN201518291U (en) * | 2009-10-29 | 2010-06-30 | 中国振华电子集团宇光电工有限公司 | Vacuum arc extinction chamber contact with supporting device |
| CN202650967U (en) * | 2012-07-12 | 2013-01-02 | 中国振华电子集团宇光电工有限公司（国营第七七一厂） | Novel contact base of vacuum interrupter with shock absorption device |
| CN202712042U (en) * | 2012-07-12 | 2013-01-30 | 中国振华电子集团宇光电工有限公司（国营第七七一厂） | Means of connecting reinforcing ribs and hooks for contacts in vacuum arc-extinguishing chamber |
| CN103915284A (en) * | 2014-04-10 | 2014-07-09 | 中国振华电子集团宇光电工有限公司（国营第七七一厂） | Contact seat damping structure |
| CN208738131U (en) * | 2018-05-21 | 2019-04-12 | 中国振华电子集团宇光电工有限公司（国营第七七一厂） | A kind of vacuum arc-extinguishing chamber contact system structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116453902A (en) * | 2023-06-13 | 2023-07-18 | 成都旭光电子股份有限公司 | Novel vacuum interrupter contact structure |
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Application publication date: 20200821 |
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| RJ01 | Rejection of invention patent application after publication |