CN207938525U - A kind of vacuum interrupter for from even pressure type vacuum circuit breaker with multi breaks - Google Patents
A kind of vacuum interrupter for from even pressure type vacuum circuit breaker with multi breaks Download PDFInfo
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- CN207938525U CN207938525U CN201820535054.1U CN201820535054U CN207938525U CN 207938525 U CN207938525 U CN 207938525U CN 201820535054 U CN201820535054 U CN 201820535054U CN 207938525 U CN207938525 U CN 207938525U
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Abstract
The utility model belongs to high-pressure vacuum switch field, it is related to a kind of vacuum interrupter for from even pressure type vacuum circuit breaker with multi breaks, vacuum interrupter includes upper end cover, static contact, BST ceramic cases, shielding case, moving contact, bellows shield cover, bellows and bottom end cover.The BST ceramic cases are columnar hollow structure, and upper end cover and bottom end cover constitute vacuum sealing space respectively with BST ceramic case upper and lower ends airtight connections；The shielding case is placed in BST ceramic cases, the lower face connection of static contact and upper end cover；The lower end axis of moving contact penetrates bottom end cover, and the bellows being connect with bottom end cover is cased on the axis of lower end.The utility model, can be under conditions of no equalizing capacitance based on this vacuum circuit breaker with multi breaks constituted from even pressure type vacuum interrupter, and voltage is uniformly distributed between realizing each fracture, improves the connecting-disconnecting function of vacuum circuit breaker with multi breaks.It is this simple in structure from even pressure type vacuum circuit breaker with multi breaks vacuum interrupter, it is easy to implement.
Description
Technical field
The utility model belongs to high-pressure vacuum switch field, is related to a kind of be used for from even pressure type vacuum circuit breaker with multi breaks
Vacuum interrupter.
Technical background
It is to avoid the saturation effect of vacuum gap using the concatenated mode of multiple fractures, by vacuum circuit breaker to high voltage etc.
The effective measures that grade is promoted.Voltage's distribiuting between each fracture has weight to the integral insulation intensity and connecting-disconnecting function of breaker
It influences, and the voltage born between each fracture has much relations with its equivalent self-capacitance value.Due to the presence of stray capacitance,
The vacuum circuit breaker with double breaks for using two identical commercial vacuum arc-chutes to constitute, the electricity that high-pressure side fracture is born
Pressure is also high compared with low-pressure side fracture.Generally in vacuum circuit breaker with double breaks, high-pressure side fracture bears nearly 70% total voltage.
During cut-offfing short circuit current, bearing the fracture of high voltage may puncture.In this case, if low-pressure side is disconnected
Mouth can not bear whole recovery voltage, then low-pressure side fracture can also puncture in succession, be opened so as to cause entire breaker
Disconnected failure.
Solving the measure of voltage's distribiuting unevenness in vacuum circuit breaker with multi breaks field at present is pressed in the parallel connection of fracture both ends
Capacitance.However, on the one hand parallel equalizing capacitor improves the cost of vacuum circuit breaker with multi breaks, system is on the other hand reduced
Safety and reliability.In During Process of Long-term Operation, insulation degradation causes the accident generation equalizing capacitance, such as Chongqing electricity in 2005
Explosion accident occurs for two equalizing capacitances of power company longevity station 5053# switches.After equalizing capacitance increases to certain value, occur
When puncturing after arc, equalizing capacitance increases breakdown current, and connecting-disconnecting function continuously decreases.In addition, equalizing capacitance and system perception member
The resonance overvoltage and Restriking overvoltage that part is likely to form can cause equalizing capacitance potential hidden danger.
Utility model content
The utility model provides a kind of vacuum interrupter for from even pressure type vacuum circuit breaker with multi breaks, solves
Under conditions of equalizing capacitance, the problem of voltage between each fracture is uniformly distributed is cannot achieve, and improve multi-break vacuum
The connecting-disconnecting function of breaker.
The technical solution of the utility model：
A kind of vacuum interrupter for from even pressure type vacuum circuit breaker with multi breaks, including upper end cover 1, static contact 2, BST
Ceramic case 4, shielding case 5, moving contact 6, bellows shield cover 7, bellows 8 and bottom end cover 9.
The BST ceramic cases 4 are columnar hollow structure, upper end cover 1 and bottom end cover 9 respectively with BST ceramic cases about 4 two
Airtight connection is held, vacuum sealing space is constituted.
The shielding case 5 is fixed on 4 inner wall of BST ceramic cases；The top of static contact 2 is connect with the lower face of upper end cover 1；
The lower end axis of moving contact 6 penetrates bottom end cover 9, and the bellows 8 being connect with bottom end cover 9 is cased on the axis of lower end, and bellows 8 plays spring
Effect enables moving contact 6 to move up and down in BST ceramic cases 4.Static contact 2 is coaxial corresponding with moving contact 6, under static contact 2
It portion and is placed in inside shielding case 5 with the top of moving contact 6；Bellows shield cover 7 is sleeved on the outside of bellows 8.
Further, a kind of vacuum interrupter for from even pressure type vacuum circuit breaker with multi breaks also includes ceramic inner casing
3, the ceramic inner casing 3 is columnar hollow structure, is placed between BST ceramic cases 4 and shielding case 5.
The ceramic inner casing 3 is using the CaO-Al containing 95% aluminium oxide2O3-SiO2System alumina porcelain；BST ceramic cases 4 are adopted
With the ceramic material BST for the high-k that barium strontium adulterates, dielectric constant 2300, insulation resistance is more than 1 × 1011Ω。
The component of BST ceramic cases 4 by percentage to the quality, includes 60% BaTiO3, 25% SrTiO3, 13% Bi2O3·
3TiO2, 1.5% Co2O3With 0.5% Fe3O4。
The dimensional parameters of BST ceramic cases 4 meet formula 7.82L=(R1-R2)；
Wherein, L is 4 height of BST ceramic cases, R1For the outer diameter of BST ceramic cases 4, R2For the internal diameter of BST ceramic cases 4.
Upper end cover 1 and bottom end cover 9 are used as electrode, the BST ceramic cases 4 of high-k to be used as dielectric, constitute one
The larger equivalent capacity of capacity.
The beneficial effects of the utility model：Certainly there are two types of realization methods for the vacuum interrupter of pressing of the utility model, pass through
The high-k performance of BST ceramic cases improves the equivalent capacity parameter of vacuum interrupter.It is gone out from even pressure type vacuum based on this
The vacuum circuit breaker with multi breaks that arc chamber is constituted, can be under conditions of no equalizing capacitance, and voltage is uniform between realizing each fracture
Distribution, improves the connecting-disconnecting function of vacuum circuit breaker with multi breaks.It is this from even pressure type vacuum circuit breaker with multi breaks vacuum extinction
Cell structure is simple, is easy to implement.Meanwhile use of the equalizing capacitance in vacuum circuit breaker with multi breaks can be replaced, it avoids pressing
Capacitance brings adverse effect and security risk in interrupting process.
Description of the drawings
Fig. 1 is 1 structural schematic diagram of Novel vacuum interrupter.
Fig. 2 is 2 structural schematic diagram of Novel vacuum interrupter.
In figure, 1 upper end cover；2 static contacts；3 ceramic inner casings；4BST ceramic cases；5 shielding cases；6 moving contacts；7 bellows shields
Cover；8 bellowss；Bottom end cover 9.
Specific implementation mode
Specific embodiment of the present utility model is described in detail below in conjunction with technical solution and attached drawing.
As shown in Figure 1, a kind of for from the vacuum interrupter of even pressure type vacuum circuit breaker with multi breaks, including it is upper end cover 1, quiet
Contact 2, ceramic inner casing 3, BST ceramic cases 4, shielding case 5, moving contact 6, bellows shield cover 7, bellows 8 and bottom end cover 9.
The BST ceramic cases 4 and ceramic inner casing 3 are columnar hollow structure, and ceramic inner casing 3 is placed in BST ceramic cases 4,
Upper end cover 1 and bottom end cover 9 the upper and lower ends airtight connection with BST ceramic cases 4 and ceramic case 3 respectively, constitute vacuum sealing space.
The shielding case 5 is placed in ceramic inner casing 3, and static contact 2 is connect with the lower face of upper end cover 1；Under moving contact 6
End axis penetrates bottom end cover 9, and the bellows 8 being connect with bottom end cover 9 is cased on the axis of lower end, and bellows 8 plays spring, makes to touch
First 6 can move up and down.Static contact 2 is coaxial corresponding with moving contact 6, and bellows shield cover 7 is sleeved on the outside of bellows 8.
The ceramic inner casing 3 is using the CaO-Al containing 95% aluminium oxide2O3-SiO2System alumina porcelain；BST ceramic cases 4 are adopted
With the ceramic material BST for the high-k that barium strontium adulterates, dielectric constant 2300, insulation resistance is more than 1 × 1011Ω。
The component of BST ceramic cases 4 by percentage to the quality, includes 60% BaTiO3, 25% SrTiO3, 13% Bi2O3·
3TiO2, 1.5% Co2O3With 0.5% Fe3O4。
Upper end cover 1 and bottom end cover 9 are used as electrode, the BST ceramic cases 4 of high-k to be used as dielectric, constitute one
The larger equivalent capacity of capacity.
For the arc-chutes there are two types of realization method, one is exhausted using two layers from even pressure type vacuum interrupter (vacuum interrupter 1)
Edge ceramic case, internal layer ceramic case use the CaO-Al2O3-SiO2 system alumina porcelains containing 95% aluminium oxide；Outer layer ceramic case uses
The ceramic material of the high-k of barium strontium doping.Vacuum interrupter internal layer ceramic case plays the role of sealing vacuum, together
When with outer layer ceramic case form equivalent self-capacitance.Change outer layer ceramic case component and plays the increase equivalent self-capacitance of vacuum interrupter
Effect.Secondly the realization method from even pressure type vacuum interrupter (vacuum interrupter 2) is, 95% oxygen is replaced using BST ceramic cases
Change aluminium ceramic case, increase the equivalent capacity parameter of vacuum interrupter while sealing vacuum, realizes from even pressure type vacuum extinction
The integration of room.
The amount of capacity of the equivalent capacity from even pressure type vacuum interrupter under two ways depends on both depending on BST potteries
The relative dielectric constant of ceramic shell and its thickness.The vacuum circuit breaker with multi breaks being made of this vacuum interrupter reaches multibreak
The effect that the equivalent capacity parameter of each fracture is 500pF in mouth vacuum circuit breaker.To adapt to cut-off different short circuit current occasions
Requirement in lower vacuum circuit breaker with multi breaks to vacuum interrupter can select to be suitably composed multi-break vacuum circuit breaker according to formula
The outer layer ceramic case dimensional parameters of vacuum interrupter meet formula 7.82L=(R in device1-R2), wherein L is that BST ceramic cases 4 are high
Degree, R1For the outer diameter of BST ceramic cases 4, R2For the internal diameter of BST ceramic cases 4.
Claims (5)
1. a kind of for from the vacuum interrupter of even pressure type vacuum circuit breaker with multi breaks, which is characterized in that including upper end cover (1),
Static contact (2), BST ceramic cases (4), shielding case (5), moving contact (6), bellows shield cover (7), bellows (8) and bottom end cover
(9)；
The BST ceramic cases (4) are columnar hollow structure, upper end cover (1) and bottom end cover (9) respectively on BST ceramic cases (4)
Lower both ends airtight connection constitutes vacuum sealing space；
The shielding case (5) is fixed on BST ceramic cases (4) inner wall；The lower face on the top and upper end cover (1) of static contact (2)
Connection；The lower end axis of moving contact (6) penetrates bottom end cover (9), and the bellows (8) being connect with bottom end cover (9) is cased on the axis of lower end,
Bellows (8) plays spring, makes moving contact (6) that can move up and down in BST ceramic cases (4)；Static contact (2) and moving contact
(6) coaxial corresponding, the lower part of static contact (2) and to be placed in shielding case (5) with the top of moving contact (6) internal；Bellows shield cover
(7) it is sleeved on the outside of bellows (8)；
The BST ceramic cases (4) are using the ceramic material BST of the high-k of barium strontium doping, and component is with quality
Percentages include 60% BaTiO3, 25% SrTiO3, 13% Bi2O3·3TiO2, 1.5% Co2O3With 0.5%
Fe3O4。
2. vacuum interrupter as described in claim 1, which is characterized in that also include ceramic inner casing (3), the ceramic inner casing
(3) it is columnar hollow structure, is placed between BST ceramic cases (4) and shielding case (5)；Ceramic inner casing (3) is using containing 95% aluminium oxide
CaO-Al2O3-SiO2System alumina porcelain.
3. vacuum interrupter as claimed in claim 1 or 2, which is characterized in that the dielectric constant of BST ceramic cases (4) is 2300,
Insulation resistance is more than 1 × 1011Ω。
4. vacuum interrupter as claimed in claim 1 or 2, which is characterized in that the dimensional parameters of BST ceramic cases (4) meet public
Formula 7.82L=(R1-R2)；
Wherein, L is BST ceramic cases (4) height, R1For the outer diameter of BST ceramic cases (4), R2For the internal diameter of BST ceramic cases (4).
5. vacuum interrupter as claimed in claim 3, which is characterized in that the dimensional parameters of BST ceramic cases (4) meet formula
7.82L=(R1-R2)；
Wherein, L is BST ceramic cases (4) height, R1For the outer diameter of BST ceramic cases (4), R2For the internal diameter of BST ceramic cases (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820535054.1U CN207938525U (en) | 2018-04-12 | 2018-04-12 | A kind of vacuum interrupter for from even pressure type vacuum circuit breaker with multi breaks |
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| CN201820535054.1U CN207938525U (en) | 2018-04-12 | 2018-04-12 | A kind of vacuum interrupter for from even pressure type vacuum circuit breaker with multi breaks |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321000A (en) * | 2018-04-12 | 2018-07-24 | 大连理工大学 | A kind of vacuum interrupter for from even pressure type vacuum circuit breaker with multi breaks |
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2018
- 2018-04-12 CN CN201820535054.1U patent/CN207938525U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321000A (en) * | 2018-04-12 | 2018-07-24 | 大连理工大学 | A kind of vacuum interrupter for from even pressure type vacuum circuit breaker with multi breaks |
| CN108321000B (en) * | 2018-04-12 | 2024-01-02 | 大连理工大学 | Vacuum arc-extinguishing chamber for self-equalizing multi-fracture vacuum circuit breaker |
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