CN103022928A - Contact double-shielding structure - Google Patents
Contact double-shielding structure Download PDFInfo
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- CN103022928A CN103022928A CN2012105859421A CN201210585942A CN103022928A CN 103022928 A CN103022928 A CN 103022928A CN 2012105859421 A CN2012105859421 A CN 2012105859421A CN 201210585942 A CN201210585942 A CN 201210585942A CN 103022928 A CN103022928 A CN 103022928A
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- contact
- fixed contact
- solid insulator
- shielding net
- shield structure
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Abstract
The invention discloses a contact double-shielding structure. The contact double-shielding structure comprises a first fixed contact, a first shielding net, a second shielding net, a second fixed contact, a solid insulator and a grounding conductive coating, the first shielding net and the second shielding net are arranged in the solid insulator at an interval, a cavity is arranged in the solid insulator, the first fixed contact and the second contact are arranged in the cavity at an interval, the first fixed contact is electrically connected with the first shielding net by a coupling screw, the second fixed contact is electrically connected with the second shielding net through a coupling screw, and the grounding conductive coating is arranged on the periphery of the solid insulator. The shielding nets are connected with the fixed contact units by the aid of the screws, and a movable contact unit is positioned in the two fixed contact units and plays a role in electric connection. By the aid of the double-shielding structure, internal fault problems caused by low insulating strength of insulating gas can be decreased greatly.
Description
[technical field]
The present invention relates to the metal enclosed switchgear technical field, particularly a kind of contact place double shield structure with gauze screen in the metal enclosed switchgear.
[background technology]
In the known existing metal enclosed switchgear, the insulation at general its movable contact place normally insulation by contact surrounding air or other dielectrics reaches over the ground or phase insulation, yet because the dielectric strength of air is much smaller than solid insulating material, so the dielectric strength around the contact usually exists lower and causes the problem that punctures.
[summary of the invention]
The object of the present invention is to provide a kind of contact double shield structure, with the unreasonable structure that solves existing high voltage switchgear movable contact place and under high voltage condition the insulate problem of relatively poor easy puncture of the dielectric such as contact surrounding air.
To achieve these goals, the present invention adopts following technical scheme:
A kind of contact double shield structure comprises the first fixed contact, the first gauze screen, secondary shielding net, the second fixed contact, solid insulator and ground connection conductive coating; The first gauze screen and secondary shielding net are arranged at intervals in the solid insulator, be provided with cavity in the solid insulator, be interval with the first fixed contact and the second fixed contact in the cavity, the first fixed contact is electrically connected by attachment screw and the first gauze screen, and the second fixed contact is electrically connected by attachment screw and secondary shielding net; The periphery of solid insulator is provided with the ground connection conductive coating.
The present invention further improves and is: the first gauze screen, secondary shielding net at the axial distance between the solid insulator less than the axial distance between the first fixed contact and the second fixed contact.
The present invention further improves and is: solid insulator adopts the homogeneous insulating material to make.
The present invention further improves and is: be provided with the moving contact that is electrically connected described the second fixed contact in the described cavity; Moving contact is tubulose or column.
The present invention further improves and is: the first gauze screen and secondary shielding net are made by metal or conductive nylon material, and thickness is 1-2mm.
The present invention further improves and is: the equal rounding in termination of the first gauze screen and secondary shielding net.
The present invention further improves and is: the material of ground connection conductive coating is semi-conducting material.
The present invention further improves and is: the material of ground connection conductive coating is electric conducting material.
The present invention further improves and is: insulation gas filled in the described cavity.
Compared with prior art, beneficial effect of the present invention is: the present invention proposes a kind of low cost and miniaturization, and can at utmost avoid because the double shield structure that accidental discharge causes insulating material to destroy; This shielding construction is connected gauze screen by screw with the fixed contact unit, wherein the movable contact unit is in two fixed contact unit and plays the electrical connection effect, and this double shield structure can reduce greatly by the lower internal fault problem of bringing of gas-insulated medium dielectric strength.
[description of drawings]
View when Fig. 1 is the conducting of a kind of contact double shield structure of the present invention moving contact;
View when Fig. 2 disconnects for a kind of contact double shield structure moving contact of invention.
[embodiment]
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:
As depicted in figs. 1 and 2, a kind of contact double shield structure of the present invention comprises the first fixed contact 1, the first gauze screen 3, secondary shielding net 2, moving contact 4, the second fixed contact 5, solid insulator 7 and ground connection conductive coating 8.The first gauze screen 3 and secondary shielding net 2 intervals are cast in the solid insulator 7, be provided with cavity in the solid insulator 7, be interval with the first fixed contact 1 and the second fixed contact 5 in the cavity, the first fixed contact 1 is electrically connected by attachment screw 6 and the first gauze screen 3, and the second fixed contact 5 is electrically connected by attachment screw and secondary shielding net 2.Also be provided with moving contact 4 in the cavity; The periphery of solid insulator 7 is provided with ground connection conductive coating 8.The first gauze screen 3, secondary shielding net 2 at the axial distance D23 between the solid insulator 7 less than the axial distance D1-5 between the first fixed contact 1 and the second fixed contact 5.The insulating material of a kind of homogeneous of solid insulator 7 usefulness is made.Solid insulator 7 is designed to airtight isolated location or is designed to be provided with for the unit of internal gas by the hole.Moving contact 4 is tubulose or column.The first gauze screen 3, secondary shielding net 2 are made by metal or conductive nylon material, and thickness is 1-2mm.The equal rounding in termination of the first gauze screen 3, secondary shielding net 2 is to optimize Electric Field Distribution.Ground connection conductive coating 8 can be semi-conducting material or other electric conducting materials.
See also shown in Figure 1ly, when moving contact 4 moves to position shown in Fig. 1 when closing a floodgate, moving contact 4 interconnects the first fixed contact 1 and the second fixed contact 5, forms major loop.At this moment, because the electrical connection effect of attachment screw, the major loop that is formed by the first fixed contact 1, the second fixed contact 5 and moving contact 4 is converted into the insulation against ground problem of ground connection conductive coating 8: by the Insulation Problems of the first gauze screen 3,2 pairs of ground connection conductive coatings 8 of secondary shielding net in the solid insulator 7.Because therefore the dielectric strength of solid insulator 7, has avoided being born by the gas-insulated medium in solid insulator 7 cavities problem of most of voltage far above the gas-insulated medium intensity in its internal cavities.
As shown in Figure 2, when moving contact 4 move to the second fixed contact 5 aligned positions after for open position, the major loop disconnection that is formed by the first fixed contact 1, the second fixed contact 5 and moving contact 4.At this moment, apply high voltage at the first fixed contact 1 end, because the electrical connection effect of attachment screw, the high potential of the first fixed contact 1 is introduced in the solid insulator 7 by the first gauze screen 3 and attachment screw.Therefore, the Insulation Problems of 1 pair of ground connection conductive coating 8 of the first fixed contact is converted into by the higher solid insulator 7 of dielectric strength and bears, and avoids bearing most of voltage by the gas-insulated medium in solid insulator 7 cavitys.
Claims (9)
1. a contact double shield structure is characterized in that, comprises the first fixed contact (1), the first gauze screen (3), secondary shielding net (2), the second fixed contact (5), solid insulator (7) and ground connection conductive coating 8; The first gauze screen (3) and secondary shielding net (2) are arranged at intervals in the solid insulator (7), solid insulator is provided with cavity in (7), be interval with the first fixed contact (1) and the second fixed contact (5) in the cavity, the first fixed contact (1) is electrically connected by attachment screw and the first gauze screen (3), and the second fixed contact (5) is electrically connected by attachment screw and secondary shielding net (2); The periphery of solid insulator (7) is provided with ground connection conductive coating (8).
2. a kind of contact double shield structure according to claim 1, it is characterized in that, the first gauze screen (3), secondary shielding net (2) at the axial distance between the solid insulator (7) less than the axial distance between the first fixed contact (1) and the second fixed contact (5).
3. a kind of contact double shield structure according to claim 1 is characterized in that, solid insulator (7) adopts the homogeneous insulating material to make.
4. a kind of contact double shield structure according to claim 1 is characterized in that, is provided with the moving contact (4) that is electrically connected described the second fixed contact (5) in the described cavity; Moving contact (4) is tubulose or column.
5. a kind of contact double shield structure according to claim 1 is characterized in that, the first gauze screen (3) and secondary shielding net (2) are made by metal or conductive nylon material, and thickness is 1-2mm.
6. a kind of contact double shield structure according to claim 1 is characterized in that, the equal rounding in termination of the first gauze screen (3) and secondary shielding net (2).
7. a kind of contact double shield structure according to claim 1 is characterized in that, the material of ground connection conductive coating (8) is semi-conducting material.
8. a kind of contact double shield structure according to claim 1 is characterized in that, the material of ground connection conductive coating (8) is electric conducting material.
9. a kind of contact double shield structure according to claim 1 is characterized in that, and is insulation gas filled in the described cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585942.1A CN103022928B (en) | 2012-12-28 | 2012-12-28 | A kind of contact double shield structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585942.1A CN103022928B (en) | 2012-12-28 | 2012-12-28 | A kind of contact double shield structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103022928A true CN103022928A (en) | 2013-04-03 |
| CN103022928B CN103022928B (en) | 2015-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210585942.1A Active CN103022928B (en) | 2012-12-28 | 2012-12-28 | A kind of contact double shield structure |
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| CN (1) | CN103022928B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241059A (en) * | 2014-09-18 | 2014-12-24 | 江苏科兴电器有限公司 | High-voltage fuse with shielding function |
| CN104485254A (en) * | 2014-11-20 | 2015-04-01 | 平高集团有限公司 | Switched fracture structure and high-voltage switch comprising same |
| CN104658811A (en) * | 2015-03-19 | 2015-05-27 | 麦克奥迪（厦门）电气股份有限公司 | Pole component of solid sealed terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201717518U (en) * | 2010-06-29 | 2011-01-19 | 中国西电电气股份有限公司 | Contact box with double-shielding structure |
| CN102024610A (en) * | 2009-09-09 | 2011-04-20 | 日本Ae帕瓦株式会社 | Circuit breaker |
| EP2463883A1 (en) * | 2010-12-09 | 2012-06-13 | Schneider Electric Industries SAS | Device for detecting a loss of vacuum in a vacuum cutting device and vacuum cutting device comprising such a device |
-
2012
- 2012-12-28 CN CN201210585942.1A patent/CN103022928B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024610A (en) * | 2009-09-09 | 2011-04-20 | 日本Ae帕瓦株式会社 | Circuit breaker |
| CN201717518U (en) * | 2010-06-29 | 2011-01-19 | 中国西电电气股份有限公司 | Contact box with double-shielding structure |
| EP2463883A1 (en) * | 2010-12-09 | 2012-06-13 | Schneider Electric Industries SAS | Device for detecting a loss of vacuum in a vacuum cutting device and vacuum cutting device comprising such a device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241059A (en) * | 2014-09-18 | 2014-12-24 | 江苏科兴电器有限公司 | High-voltage fuse with shielding function |
| CN104485254A (en) * | 2014-11-20 | 2015-04-01 | 平高集团有限公司 | Switched fracture structure and high-voltage switch comprising same |
| CN104658811A (en) * | 2015-03-19 | 2015-05-27 | 麦克奥迪（厦门）电气股份有限公司 | Pole component of solid sealed terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103022928B (en) | 2015-07-29 |
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Effective date of registration: 20210816 Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. Address before: 710075 Shaanxi city of Xi'an Province Tang Hing Road No. 7 Patentee before: CHINA XD ELECTRIC Co.,Ltd. Patentee before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: Xi'an High Voltage Electrical Apparatus Research Institute Co.,Ltd. Address before: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |