CN109841452B - Vacuum arc extinguish chamber and contact shielding structure thereof - Google Patents
Vacuum arc extinguish chamber and contact shielding structure thereof Download PDFInfo
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- CN109841452B CN109841452B CN201711218958.8A CN201711218958A CN109841452B CN 109841452 B CN109841452 B CN 109841452B CN 201711218958 A CN201711218958 A CN 201711218958A CN 109841452 B CN109841452 B CN 109841452B
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- contact
- conducting rod
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- 230000003068 static effect Effects 0.000 claims abstract description 103
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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Abstract
The invention relates to a vacuum arc-extinguishing chamber and a contact shielding structure thereof, wherein the contact shielding structure comprises a static cover plate which is used for being connected with an insulating shell to form a shell structure, the static cover plate is a barrel-shaped metal shielding plate, a static conducting rod fixing structure is arranged on the static cover plate, and a shielding cover which is used for being fixed on a dynamic conducting rod is also included, the shielding cover and the static cover plate jointly enclose a shielding cavity for covering a moving contact and a static contact in the static cover plate, the shielding cover has a closing shielding position when the moving contact is combined with the static contact and an opening shielding position when the moving contact is separated from the static contact in the process of reciprocating movement along with the dynamic conducting rod, the separating shielding position and the closing shielding position are both positioned in the static cover plate, the manufacturing cost of the shielding cover is greatly saved, the cost of a metalized porcelain shell is also saved, and the installation size of a main shielding cover on the shell is not required to be additionally increased, the overall cost of the vacuum arc extinguish chamber is reduced, and the miniaturization manufacturing of the vacuum arc extinguish chamber is facilitated.
Description
Technical Field
The invention relates to a vacuum arc extinguish chamber and a contact shielding structure thereof.
Background
At present, the manufacturing technology of the vacuum arc-extinguishing chamber with low voltage class (40.5 kV and below) is mature day by day, and the vacuum arc-extinguishing chamber is expected to be developed in the direction of miniaturization and economy. The contact shielding structure of the vacuum arc extinguish chamber in the prior art mainly comprises a main shielding cover arranged on a shell, wherein a contact on a static conducting rod and a contact on a movable conducting rod are separated and combined in the shielding cover, and the main shielding cover can better realize the shielding effect on the contacts. At present, a main shielding cover and a shell are usually fixed in a way of fixing a porcelain shell middle and offset at one end of the porcelain shell, and for an arc extinguish chamber with a low voltage level, in the process of opening and closing a moving contact and a static contact, a middle potential is generated on the main shielding cover, so that the shielding performance is reduced; at the same time, the design of such a main shield requires a corresponding dimension in the diametrical direction of the interior of the housing, which affects the design of the miniaturized construction of the arc chute.
Disclosure of Invention
The invention aims to provide a vacuum arc-extinguishing chamber, which aims to solve the problem that the miniaturization design of the arc-extinguishing chamber is influenced by the arrangement of a main shielding case of the vacuum arc-extinguishing chamber in the prior art; the invention also aims to provide a contact shielding structure of the vacuum arc-extinguishing chamber.
In order to achieve the purpose, the technical scheme of the contact shielding structure is as follows:
scheme 1: the contact shielding structure comprises a static cover plate which is used for being connected with an insulating shell to form a shell structure, wherein the static cover plate is a barrel-shaped metal shielding plate, a static conducting rod fixing structure is arranged on the static cover plate, the static cover plate also comprises a shielding cover which is used for being fixed on a dynamic conducting rod, the shielding cover and the static cover plate jointly enclose a shielding cavity which is used for covering a moving contact and a static contact in the static cover plate, the shielding cover has a closing shielding position when the moving contact and the static contact are combined and an opening shielding position when the moving contact and the static contact are separated in the process of following the reciprocating movement of the dynamic conducting rod, and the opening shielding position and the closing shielding position are both located in the static cover plate.
Scheme 2: on the basis of the scheme 1, the shielding case comprises a shielding case main body, and the shielding case main body and the barrel-shaped bottom of the static cover plate are arranged in parallel.
Scheme 3: on the basis of the scheme 2, the shielding case further comprises a curled part which is arranged at the outer end of the shielding case main body, faces the barrel-shaped bottom of the static cover plate and is curled in the direction vertical to the barrel-shaped bottom.
Scheme 4: on the basis of the scheme 1, the shielding cover is provided with a welding part for welding and fixing with the movable conducting rod.
The technical scheme of the vacuum arc-extinguishing chamber is as follows:
scheme 5: the vacuum arc extinguish chamber comprises a shell, a movable conducting rod and a static conducting rod which are arranged in the shell, wherein a movable contact is arranged on the movable conducting rod, a static contact which is connected with the movable contact in a split mode is arranged on the static conducting rod, a contact shielding structure is arranged between the movable contact and the static contact, the shell comprises an insulating outer plate, the contact shielding structure comprises a static cover plate which is connected with an insulating shell to form the shell, the static cover plate is a barrel-shaped metal shielding plate, the static conducting rod is fixed on the static cover plate, the contact shielding structure further comprises a shielding cover which is fixed on the conducting rod, the shielding cover and the static cover plate jointly enclose a shielding cavity, the movable contact and the static contact are both positioned in the shielding cavity, and the shielding cover has a closing shielding position when the movable contact is combined with the static contact and a breaking shielding position when the movable contact is separated from the static contact in the process of reciprocating movement along with the movable conducting rod, and the separation shielding position and the closing shielding position are both positioned in the static cover plate.
Scheme 6: on the basis of the scheme 5, the shielding case comprises a shielding case main body, and the shielding case main body is arranged in parallel with the barrel-shaped bottom of the static cover plate.
Scheme 7: on the basis of the scheme 6, the shield cover further comprises a curled part which is arranged at the outer end of the shield cover main body, faces the barrel-shaped bottom of the static cover plate and is curled in the direction vertical to the barrel-shaped bottom.
Scheme 8: on the basis of the scheme 5, the shielding cover and the movable conducting rod are welded and fixed.
Scheme 9: on the basis of any one of the schemes 5-8, the insulating outer plate is a metalized ceramic shell which comprises a ceramic shell and metal connecting structures sintered at two ends of the ceramic shell, and the metalized ceramic shell is welded and fixed with the static cover plate.
Scheme 10: on the basis of any one of the schemes 5 to 8, a corrugated pipe is arranged between the shell and the movable conducting rod in a jacking and pressing mode, the left end of the corrugated pipe is in jacking and sealing fit with the shell, and the right end of the corrugated pipe is in jacking and sealing fit with the movable conducting rod.
The invention has the beneficial effects that: compared with the prior art, the vacuum arc extinguish chamber has the advantages that the static cover plate connected with the insulating shell to form the shell replaces the main shield cover, the shield cover synchronously moving with the follow-up conducting rod is arranged on the movable conducting rod, so that the original main shield cover can replace a shield cavity for shielding a static contact and a movable contact, the motion characteristic of the movable conducting rod is fully utilized to drive the shield cover to move together, the continuous and uniform shielding effect is achieved, the static cover plate is skillfully utilized, the overall design structure is simple, the manufacturing cost of the shield cover is greatly saved, meanwhile, one part of the original metalized ceramic shell is replaced by the static cover plate, the cost of the metalized ceramic shell is saved, the installation size of the main shield cover on the shell is not required to be additionally increased, and the overall cost of the vacuum arc extinguish chamber is reduced, is beneficial to the miniaturization and the manufacture of the vacuum arc-extinguishing chamber.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of a vacuum interrupter according to the present invention;
fig. 2 is a structural schematic diagram of a state in which the moving contact and the fixed contact are separated in fig. 1;
fig. 3 is a schematic structural diagram of a second embodiment of the vacuum interrupter according to the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
A first embodiment of the vacuum interrupter of the present invention, as shown in fig. 1 to 2, is used in a vacuum switch with a low voltage class (45.0 kV or below), and includes a housing, a movable conducting rod 1 and a static conducting rod 7, which are disposed in the housing, wherein an axis of the housing extends along a left-right direction, the movable conducting rod 1 is inserted into a left end of the housing, the static conducting rod 7 is fixed to a right end of the housing, a movable contact 9 is disposed at a right end of the movable conducting rod 1, a static contact 8 is disposed at a left end of the static conducting rod 7, and a contact shielding structure is disposed between the movable contact 9 and the static contact 8.
In this embodiment, the housing includes a metalized ceramic shell 4, the metalized ceramic shell 4 is a cylindrical structure, and includes a ceramic shell and metal structures sintered at two ends of the ceramic shell, the left end of the metalized ceramic shell is welded with a movable cover plate 2, the right end of the metalized ceramic shell is welded with a static cover plate 6, both the movable cover plate 2 and the static cover plate 6 are metal plates, the corresponding metalized ceramic shell 4, the movable cover plate 2 and the static cover plate 6 are oppositely buckled and butted to form the housing, a movable contact 9 and a static contact 8 are enclosed in the housing, the movable conductive rod 1 is threaded on the movable cover plate 2, the static conductive rod 7 is fixed on the static cover, specifically, the movable cover plate 2 and the static cover plate 6 are both cylindrical structures, the opening of the static cover plate 6 faces to the left side, and the static conductive rod 7 is fixed on the middle axial line at the right end of the static cover plate 6; for the movable cover plate 2, the opening of the movable cover plate faces the right side, the movable conducting rod 1 is arranged at the position of the middle axis at the left end of the movable cover plate 2 in a penetrating mode, meanwhile, a corrugated pipe 3 is arranged between the movable cover plate 2 and the movable conducting rod 1 in the shell in a pressing mode, the left end of the corresponding corrugated pipe 3 is pressed and sealed on the movable cover plate 2, the right end of the corresponding corrugated pipe 3 is pressed and sealed on the movable conducting rod 1, the movable contact 9 is combined with the static contact 8 when the movable conducting rod 1 moves rightwards, and the movable contact 9 is separated from the static contact 8 when the movable conducting rod 1 moves leftwards.
For the contact shielding structure, it includes the above-mentioned static cover plate 6, and also includes the shielding case 5 welded and fixed on the moving conducting rod 1, in this embodiment, the static cover plate 6 and the shielding case 5 mutually surround to form a shielding cavity shielding the moving contact 9 and the static contact 8 therein, for the shielding case 5, it includes the shielding case 5 main body and the curled portion 10 arranged at the radial outer end of the shielding case 5 main body, the curled portion 10 curls and extends towards the right side, its extending direction is perpendicular to the barrel-shaped bottom of the static cover plate 6, and it can homogenize the electric field distribution. The shield 5 has a combined shield position when the moving contact 9 and the static contact 8 are combined in the process of moving along with the moving conductive rod 1, as shown in fig. 1; a separation shielding position is also arranged when the moving contact 9 is separated from the static contact 8, as shown in figure 2; in order to ensure a continuous and uniform shielding effect, in this embodiment, the separation shielding position is located on the right side of the left end of the static cover plate 6, that is, the whole closed and broken positions of the static contact 8 and the dynamic contact 9 are both located at the static end close to the vacuum arc-extinguishing chamber, so that the dynamic contact 9 and the static contact 8 can be located in a shielding cavity formed by the shielding cover 5 and the static cover plate 6 in the whole stroke process, and the shielding cover 5 and the static cover plate 6 can absorb metal vapor and evaporant generated in the corresponding breaking and breaking process in the relatively close and far processes, that is, the arc product is collected and shielded, thereby facilitating the breaking and breaking of the arc-extinguishing chamber, and ensuring the shielding effect to a certain extent.
Meanwhile, in the embodiment, the main body of the shielding case 5 is of a sheet structure which is vertically placed, the corresponding barrel-shaped bottom of the static cover plate 6 is also of a cubic plate structure, and the shielding structure between the static cover plate and the static cover plate belongs to a plane-to-plane shielding structure, so that the uniform distribution of an electric field between the static cover plate and the static cover plate can be ensured, the shielding effect is good, the probability of point discharge is extremely low, and the insulating property is optimized.
The second embodiment of the vacuum interrupter according to the present invention: the difference from the first embodiment is that, as shown in fig. 3, the bellows 3 may be disposed outside the casing, and the inside of the casing may be isolated from the outside.
In other embodiments, the shielding case 5 and the static cover 6 may not be parallel, but they may be enclosed oppositely, and the uniform distribution of the electric field is realized by the curled portion 10 at the outer end.
The structure of the embodiment of the contact shielding structure according to the present invention is the same as the structure of the contact shielding structure in the vacuum interrupter, and is not expanded in detail.
Claims (3)
1. Vacuum interrupter, including casing and moving conducting rod, the static conducting rod of setting in the casing, be provided with the moving contact on the moving conducting rod, be equipped with the static contact of deciliter with the moving contact on the static conducting rod, be equipped with contact shielding structure, its characterized in that between moving contact and the static contact: the vacuum arc extinguish chamber comprises a static cover plate which is connected with the insulating shell to form the shell, the insulating shell is welded and fixed with the static cover plate through the metal connecting structure which is sintered at one end, facing the static cover plate, of the porcelain shell, the static cover plate is a barrel-shaped metal shielding plate, the static conducting rod is fixed on the static cover plate, the opening of the static cover plate is in a U-shaped structure, and the static conducting rod is fixed at the position of a middle shaft line at the right end of the static cover plate; the vacuum arc-extinguishing chamber further comprises a shielding case fixed on the movable conducting rod, the shielding case comprises a shielding case main body, the shielding case main body is arranged in parallel with the barrel-shaped bottom of the static cover plate, the shielding case further comprises a curled portion which is arranged at the outer end of the shielding case main body, faces the barrel-shaped bottom of the static cover plate and is curled in the direction vertical to the barrel-shaped bottom, and the curled portion is curled and extends towards the right side; the contact shielding structure comprises a static cover plate and a shielding cover, the shielding cover and the static cover plate jointly enclose a shielding cavity, the moving contact and the static contact are both located in the shielding cavity, the shielding cover has a closing shielding position when the moving contact is combined with the static contact and an opening shielding position when the moving contact is separated from the static contact in the process of moving along with the reciprocating motion of the moving conducting rod, the opening shielding position and the closing shielding position are both located in the static cover plate, the opening shielding position is located on the right side of the left end of the static cover plate, and the right end of the shielding cover is located on the left side of the static contact.
2. Vacuum interrupter according to claim 1, characterized in that: the shielding cover and the movable conducting rod are welded and fixed.
3. Vacuum interrupter according to any of the claims 1-2, characterized in that: a corrugated pipe is arranged between the shell and the movable conducting rod in a jacking and sealing mode, the left end of the corrugated pipe is in jacking and sealing fit with the shell, and the right end of the corrugated pipe is in jacking and sealing on the movable conducting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218958.8A CN109841452B (en) | 2017-11-28 | 2017-11-28 | Vacuum arc extinguish chamber and contact shielding structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218958.8A CN109841452B (en) | 2017-11-28 | 2017-11-28 | Vacuum arc extinguish chamber and contact shielding structure thereof |
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| Publication Number | Publication Date |
|---|---|
| CN109841452A CN109841452A (en) | 2019-06-04 |
| CN109841452B true CN109841452B (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711218958.8A Active CN109841452B (en) | 2017-11-28 | 2017-11-28 | Vacuum arc extinguish chamber and contact shielding structure thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112885628B (en) * | 2021-03-16 | 2022-06-03 | 宁波云振真空电器有限公司 | Automatic processing auxiliary equipment for shielding case of vacuum arc-extinguishing chamber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0528888A (en) * | 1991-07-19 | 1993-02-05 | Meidensha Corp | Vacuum interrupter |
| FR2841682B1 (en) * | 2002-06-27 | 2004-12-10 | Schneider Electric Ind Sas | VACUUM BULB FOR AN ELECTRICAL PROTECTIVE APPARATUS SUCH AS A SWITCH OR CIRCUIT BREAKER |
| CN102254733A (en) * | 2011-07-25 | 2011-11-23 | 北京京东方真空电器有限责任公司 | Double-grounded three-station vacuum switch tube |
| CN202678194U (en) * | 2012-06-29 | 2013-01-16 | 武汉飞特电气有限公司 | 12-kilovolt spline type vacuum switch tube |
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2017
- 2017-11-28 CN CN201711218958.8A patent/CN109841452B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100478394B1 (en) * | 2001-04-19 | 2005-03-24 | 미쓰비시덴키 가부시키가이샤 | Vacuum valve |
| CN101789328A (en) * | 2010-03-25 | 2010-07-28 | 北京双杰电气股份有限公司 | Three-station vacuum arc extinguish chamber for all-solid switch cabinet |
| CN101976626A (en) * | 2010-11-09 | 2011-02-16 | 常州市明及电气技术开发有限公司 | Structure of vacuum interrupter |
| CN103000440A (en) * | 2011-09-14 | 2013-03-27 | Ls产电株式会社 | Vacuum interrupter |
| CN202888064U (en) * | 2012-10-31 | 2013-04-17 | 宝鸡晨光真空电器有限责任公司 | Long-service-life vacuum arc-extinguishing chamber |
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| CN109841452A (en) | 2019-06-04 |
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