CN101281831A - High-voltage single-fracture vacuum arc chute based on two-part turn longitudinal field contact - Google Patents
High-voltage single-fracture vacuum arc chute based on two-part turn longitudinal field contact Download PDFInfo
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- CN101281831A CN101281831A CNA2008100180564A CN200810018056A CN101281831A CN 101281831 A CN101281831 A CN 101281831A CN A2008100180564 A CNA2008100180564 A CN A2008100180564A CN 200810018056 A CN200810018056 A CN 200810018056A CN 101281831 A CN101281831 A CN 101281831A
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Abstract
The present invention discloses a 2/3 turn longitudinal magnetic field contact based high-voltage single-break vacuum arc-extinguish chamber, which is used in a 126kV single-break vacuum breaker, and comprises: two casings connected to each other, end caps on the casings, and local shielding enclosures on the end caps; a primary shielding enclosure is arranged between the two casings. A static conducting pole and a moving conducting pole are connected to each end cap; a static contact is connected to the static conducting pole, and a moving contact is connected to the moving conducting pole. The clearance between the static contact and the moving contact is 40mm-80mm; the static conducting pole is connected to the end cap via a bellows joint, and an equalizing ring is provided on the back of the static contact and the back of the moving contact; the static contact and the moving contact are 2/3 turn longitudinal magnetic contacts; therefore, the longitudinal magnetic field can be enhanced at peak current, the loop resistance and the lag time of the longitudinal magnetic field can be reduced, i.e., the breaking capability and rated current capacity of the vacuum arc-extinguish chamber can be improved.
Description
Technical field
The present invention relates to a kind of high-pressure vacuum breaker, particularly a kind of rated voltage based on 2/3rds turn longitudinal field contacts is the single break high voltage vacuum interrupter of 126kV.
Background technology
SF in high pressure and superhigh pressure field at present
6The circuit breaker status that has comparative advantage.SF
6Gas has excellent thermochemistry and electronegativity, thereby insulation property and arc extinction performance are good especially, but SF
6Can produce the analyte of severe toxicity behind the gas process pyrogenetic decomposition of electric arc, and be one of main greenhouse gases.SF
6Gas is the strongest a kind of in six kinds of greenhouse gases formulating of Kyoto Protocol, and its greenhouse effects of the earth coefficient is CO
223900 times, the life-span reaches 3200 in its atmosphere.Vacuum circuit-breaker has environmental friendliness, the product reliability height, and maintenance workload is little, no fire explosion danger, product technology performance advantages of higher is a main product in middle pressure grade at present.The development high-pressure vacuum breaker is to reduce SF
6A kind of good selection of discharging.
Summary of the invention
The objective of the invention is to, propose a kind of single break high voltage vacuum interrupter based on 2/3rds turn longitudinal field contacts, this high voltage vacuum interrupter can be used in the 126kV single break vacuum circuit-breaker.
In order to realize above-mentioned task.The present invention takes following technical solution:
A kind of high-voltage single-fracture vacuum arc chamber based on 2/3rds turn longitudinal field contacts, be used in the 126kV single break vacuum circuit-breaker, comprise interconnective first shell and second shell, first shell and second shell have first end cap and second end cap respectively, are respectively equipped with first end radome and the second end radome on first end cap and second end cap; Between first shell and second shell, be provided with the main shield cover.
On first end cap, be connected with static conductive rod, on second end cap, be connected with moving conductive rod; On static conductive rod, connect fixed contact, on moving conductive rod, be connected with moving contact.
Be connected by first bellows between static conductive rod and first end cap, be connected by second bellows between moving conductive rod and second end cap, be respectively equipped with first grading ring, be provided with second grading ring at the back side of moving contact at the fixed contact back side; It is characterized in that, described fixed contact and moving contact adopt 2/3rds turn type longitudinal magnetic field contacts respectively, the structure of this 2/3rds turn type longitudinal magnetic field contact comprises a cylindrical conductor in the middle of contact, the support arm that this cylindrical conductor is identical with three shapes links to each other, each support arm links to each other with an arc guide body, the angle of arc-shaped conductor correspondence is 120 °, each arc-shaped conductor is connected with second arc-shaped conductor identical with the arc-shaped conductor shape on another face, and second arc-shaped conductor also is connected with contact blade; Leave the slit between each support arm and the arc-shaped conductor.
The empirical tests experiment, the present invention compares (Chinese patent application with existing 1/2nd turn longitudinal field contact structure for vacuum arc control device technology, 200420086389.8), can improve the connecting-disconnecting function and the rated current level of vacuum interrupter, the measure of taking comprises the longitudinal magnetic field when adopting 2/3rds turn longitudinal field contact structures to strengthen current peak, reduces loop resistance and reduces longitudinal magnetic field lag time.Compare (Chinese patent application, 200420086276.8) with existing single-turn type longitudinal field contact vacuum interrupter, the present invention has reduced loop resistance significantly under the suitable with it situation of longitudinal magnetic field intensity, thereby can improve the rated current level.
Description of drawings
Fig. 1 is 126kV superhigh pressure vacuum interrupter figure; Each symbol is among the figure: 1, the first vacuum extinction chamber enclosure, 2, the second vacuum extinction chamber enclosure, 3, moved end lid, 4, quiet end cap, 5, moved end end profile shielding cover, 6, quiet end end profile shielding cover, 7, main shield cover, 8, static conductive rod, 9, moving conductive rod, 10, fixed contact, 11, moving contact, 12, the moved end bellows, 13, quiet end bellows, 14, moved end grading ring, 15, quiet end grading ring.
Fig. 2 is 2/3rds turn longitudinal field contact figure; Symbol is among the figure: 21, cylindrical conductor, 22, support arm, 23, go up arc-shaped conductor, 24, the arc lower conductor, 25, contact blade, 26,27,28,29, the slit.
Fig. 3 is a 126kV vacuum extinction chamber distribution map of the electric field.
Longitudinal magnetic field distribution map when Fig. 4 adopts 2/3rds turn type longitudinal magnetic field contacts, current effective value is 40kA, during current peak, wherein (a) opens apart from central plane for contact blade, (b) is contact surface.
The present invention is described in further detail below in conjunction with embodiment that accompanying drawing and inventor provide.
Embodiment
As shown in Figure 1, high-voltage single-fracture vacuum arc chamber based on 2/3rds turn longitudinal field contacts of the present invention, be used in the 126kV single break vacuum circuit-breaker, it constitutes the first vacuum extinction chamber enclosure 1, the second vacuum extinction chamber enclosure 2 by 2 glass, the diameter of first, second vacuum extinction chamber enclosure at 290mm between the 320mm; First end cap 3 and second end cap 4 are sealed with the first vacuum extinction chamber enclosure 1 and the second vacuum extinction chamber enclosure 2 respectively, the distance between first end cap 3 and second end cap 4 at 600mm between the 900mm; On first end cap 3 and second end cap 4, be respectively equipped with quiet end end profile shielding cover 5 and moved end end profile shielding cover 6; On quiet end cap 3, connect static conductive rod 8, on moved end lid 4, connect moving conductive rod 9; On static conductive rod 8, connect fixed contact 10, on moving conductive rod 9, connect moving contact 11, between fixed contact 10 and the moving contact 11 open distance at 40mm between the 80mm; Be connected by quiet end bellows 12 between static conductive rod 8 and the quiet end cap 3, be connected by moved end bellows 13 between moving conductive rod 9 and the moved end lid 4; Be respectively equipped with quiet end grading ring 14 and moved end grading ring 15 at the back side of fixed contact 10 and moving contact 11.Fixed contact 10 and moving contact 11 adopt 2/3rds turn type longitudinal magnetic field contacts respectively, and the diameter of this 2/3rds turn type longitudinal magnetic field contact is 80mm to 120mm.
Fixed contact 10 and moving contact 11 adopt 2/3rds turn type longitudinal magnetic field contacts respectively, as shown in Figure 2.The contact diameter at 80mm between the 120mm.Contact is made of conductor material (oxygenless copper material).The design feature of contact is for having a cylindrical conductor 21 in the middle of contact, the support arm 22 that cylindrical conductor 21 is identical with three shapes links to each other, each support arm 22 links to each other with an arc-shaped conductor 23, the angle of arc-shaped conductor 23 correspondences is about 120 °, each arc-shaped conductor 23 is connected with another second arc-shaped conductor 24 identical with arc-shaped conductor 23 shapes at the back side, and the angle of second arc-shaped conductor, 24 correspondences also is about 120 °.This second arc-shaped conductor 24 links together with contact blade 25.Contact material is CuCr50.
Under closure state, electric current can arrive moving conductive rod 9 by moving contact 11 again via static conductive rod 8 to fixed contact 10, and vice versa.
When contact was opened breaking current, electric current to fixed contact 10, arrived moving contact 11 by electric arc via static conductive rod 8 again, was flowed out by moving conductive rod 9 at last, and vice versa.Can produce longitudinal magnetic field when electric current flows through fixed contact 10 and moving contact 11 controls vacuum arc.
Mainly containing shell sizes, clearance between open contacts and radome system based on the insulation of the high-voltage single-fracture vacuum arc chamber of 2/3rds turn longitudinal field contacts ensures.Quiet end cap 3 links together with the first vacuum extinction chamber enclosure 1 and the second vacuum extinction chamber enclosure 2 respectively with moved end lid 4, guaranteed vacuum-packed reliability, quiet end end profile shielding cover 5, the suspension of moved end end profile shielding cover 6 and main shield cover 7 is arranged so that the voltage endurance capability of vacuum interrupter is improved; Quiet end, moved end grading ring (14,15) are set to prevent the puncture at contact back respectively at the back side of fixed contact 10 and moving contact 11.Electric Field Distribution in this case as shown in Figure 3.Apply high potential 1kV at quiet end, the moved end applies under the situation of earth potential 0kV, and 126kV vacuum extinction chamber electric field strength maximum is 7.37X10
4V/m is at the marginal position of fixed contact.
Be connected by quiet end bellows 12 between static conductive rod 8 and the quiet end cap 3, be connected by moved end bellows 13 between moving conductive rod 9 and the moved end lid 4, the design of bi-bellow makes contact bounce reduce, and reduces the impact to shell.
Electric current I is flowed into by cylindrical conductor 21, is divided into three parts and enters in the support arm 22, and each support arm electric current is about I/3.Electric current I in the support arm 22/3 flow in the arc-shaped conductor 23, and then flow in the arc-shaped conductor 24.Last primary current is entered in the contact blade 25 by being connected between arc-shaped conductor 24 and the contact blade 25.In order to guarantee electric current path flow according to the rules, be provided with some slits, as the slit among the figure 26,27,28 and 29, some mechanical support can be set in the slit to guarantee mechanical strength.
High-voltage single-fracture vacuum arc chamber based on 2/3rds turn longitudinal field contacts of the present invention is compared with prior art 1/3rd longitudinal field contacts, has increased by second arc-shaped conductor 24.Make electric current walk 2/3rds circumference in arc-shaped conductor, walking 1/3rd circumference than prior art has increased current path, thereby has increased longitudinal magnetic field.The Distribution of Magnetic Field of the vertical magnetic contact of 2/3rds circles as shown in Figure 4, as contact parameter cut-off footpath 100mm, open apart from 30mm the wide 15mm of coil, the high 10mm of coil, conducting rod diameter 45mm, the thick 6mm of contact blade is when current effective value is 40kA, longitudinal magnetic field distributes shown in Fig. 4 (a) on the clearance between open contacts central plane, maximum is 0.513T, and longitudinal magnetic field distributes shown in Fig. 4 (b) on the contact face, and maximum is 0.809T.
Claims (6)
1. high-voltage single-fracture vacuum arc chamber based on 2/3rds turn longitudinal field contacts, be used in the 126kV single break vacuum circuit-breaker, comprise first shell (1) and second shell (2) that connect successively, first shell (1) and second shell (2) have first end cap (3) and second end cap (4) respectively, are respectively equipped with first end radome (5) and the second end radome (6) on first end cap (3) and second end cap (4); Between first shell (1) and second shell (2), be provided with main shield cover (7);
On first end cap (3), be connected with static conductive rod (8), on second end cap (4), be connected with moving conductive rod (9); On static conductive rod (8), be connected with fixed contact (10), go up connection moving contact (11) at moving conductive rod (9);
Be connected by first bellows (12) between static conductive rod (8) and first end cap (3), connect by second bellows (13) between moving conductive rod (9) and second end cap (4); Be provided with first grading ring (14) at the back side of fixed contact (10), be provided with second grading ring (15) at the back side of moving contact (11), it is characterized in that, described fixed contact (10) and moving contact (11) adopt 2/3rds turn type longitudinal magnetic field contacts respectively, the structure of this 2/3rds turn type longitudinal magnetic field contact comprises a cylindrical conductor (21) in the middle of contact, the support arm (22) that this cylindrical conductor (21) is identical with three shapes links to each other, each support arm (22) links to each other with an arc guide body (23), the angle that arc-shaped conductor (23) is corresponding is 120 °, each arc-shaped conductor (23) is connected with second arc-shaped conductor (24) identical with arc-shaped conductor (23) shape on another face, and second arc-shaped conductor (24) also is connected with contact blade (25); Leave the slit between each support arm (22) and the arc-shaped conductor (23).
2. the high-voltage single-fracture vacuum arc chamber based on 2/3rds turn longitudinal field contacts as claimed in claim 1 is characterized in that, the material of described first shell (1) and second shell (2) is pottery or glass.
3. the high-voltage single-fracture vacuum arc chamber based on 2/3rds turn longitudinal field contacts as claimed in claim 1 is characterized in that, the diameter of described first shell (1) and second shell (2) is 290mm to 320mm.
4. the high-voltage single-fracture vacuum arc chamber based on 2/3rds turn longitudinal field contacts as claimed in claim 1 is characterized in that, the distance between described first end cap (3) and second end cap (4) is 600mm to 900mm.
5. the high-voltage single-fracture vacuum arc chamber based on 2/3rds turn longitudinal field contacts as claimed in claim 1 is characterized in that, the distance between described fixed contact (10) and the moving contact (11) is 40mm to 80mm.
6. the high-voltage single-fracture vacuum arc chamber based on 2/3rds turn longitudinal field contacts as claimed in claim 1 is characterized in that the diameter of described 2/3rds turn type longitudinal magnetic field contacts is 80mm to 120mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100180564A CN101281831A (en) | 2008-04-25 | 2008-04-25 | High-voltage single-fracture vacuum arc chute based on two-part turn longitudinal field contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100180564A CN101281831A (en) | 2008-04-25 | 2008-04-25 | High-voltage single-fracture vacuum arc chute based on two-part turn longitudinal field contact |
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| CN101281831A true CN101281831A (en) | 2008-10-08 |
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| CNA2008100180564A Pending CN101281831A (en) | 2008-04-25 | 2008-04-25 | High-voltage single-fracture vacuum arc chute based on two-part turn longitudinal field contact |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097245A (en) * | 2009-12-15 | 2011-06-15 | 上海磁浮交通发展有限公司 | Three-phase AC (Alternating Current) high-voltage vacuum contactor with long service life |
| CN101552153B (en) * | 2009-05-15 | 2011-07-27 | 宁波晟光电气有限公司 | A vacuum arc-extinguishing chamber contact |
| WO2011130929A1 (en) * | 2010-04-20 | 2011-10-27 | 华中科技大学 | Laser triggered vacuum switch |
| CN102254734A (en) * | 2011-06-30 | 2011-11-23 | 西安交通大学 | High-voltage single-fracture vacuum arc extinguishing chamber |
| WO2012075926A1 (en) * | 2010-12-10 | 2012-06-14 | 陕西宝光真空电器股份有限公司 | Highly insulative small vacuum arc-quenching chamber |
| CN112038165A (en) * | 2020-09-17 | 2020-12-04 | 安徽普众机电有限公司 | Vacuum switch tube with reinforced structure |
-
2008
- 2008-04-25 CN CNA2008100180564A patent/CN101281831A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552153B (en) * | 2009-05-15 | 2011-07-27 | 宁波晟光电气有限公司 | A vacuum arc-extinguishing chamber contact |
| CN102097245A (en) * | 2009-12-15 | 2011-06-15 | 上海磁浮交通发展有限公司 | Three-phase AC (Alternating Current) high-voltage vacuum contactor with long service life |
| WO2011130929A1 (en) * | 2010-04-20 | 2011-10-27 | 华中科技大学 | Laser triggered vacuum switch |
| WO2012075926A1 (en) * | 2010-12-10 | 2012-06-14 | 陕西宝光真空电器股份有限公司 | Highly insulative small vacuum arc-quenching chamber |
| CN102254734A (en) * | 2011-06-30 | 2011-11-23 | 西安交通大学 | High-voltage single-fracture vacuum arc extinguishing chamber |
| CN102254734B (en) * | 2011-06-30 | 2013-10-16 | 西安交通大学 | High-voltage single-fracture vacuum arc extinguishing chamber |
| CN112038165A (en) * | 2020-09-17 | 2020-12-04 | 安徽普众机电有限公司 | Vacuum switch tube with reinforced structure |
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Open date: 20081008 |