CN201392768Y - High-voltage vacuum circuit breaker - Google Patents
High-voltage vacuum circuit breaker Download PDFInfo
- Publication number
- CN201392768Y CN201392768Y CN200920107544U CN200920107544U CN201392768Y CN 201392768 Y CN201392768 Y CN 201392768Y CN 200920107544 U CN200920107544 U CN 200920107544U CN 200920107544 U CN200920107544 U CN 200920107544U CN 201392768 Y CN201392768 Y CN 201392768Y
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- contact
- conducting rod
- switching
- pressure vacuum
- vacuum breaker
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Abstract
A high-voltage vacuum circuit breaker comprises a frame, a main shaft, an operating mechanism, a four-link component of the operating mechanism, a main circuit and a switching off buffer, wherein the main circuit is equipped with a spring cover of a contact spring and a guide rod, contacting surfaces of an upper contact and a lower contact are changed into spherical contact, and a moving stroke of a piston rod of the switching off buffer ranges from 21mm to 24mm. The high-voltage vacuum circuit breaker has the advantages of extending guide length of an upper conductive rod, reducing influence of shake, namely axial side force of the upper contact and the upper conductive rod, and improving axial characteristics of movement. Besides, as the contacting surfaces of the upper contact and the lower contact are in spherical contact, the contact area is increased, thereby facilitating quenching of arc when switching off. By changing stroke of the piston rod of the switching off buffer, a crank arm of the main shaft contacts with the switching off buffer to reduce switching off speed after the two contacts are separated with a distance of 2mm, and the time of complete switching off is about 20ms, thereby obtaining stable switching off characteristics, guaranteeing reliability of the high-voltage vacuum circuit break to break current, and enabling switching off action to meet requirements of the high-voltage vacuum circuit breaker upon electrical specification better.
Description
Technical field
The utility model relates to the high-voltage switch gear field, refers to a kind of high-pressure vacuum breaker especially.
Background technology
In patent 200720128983.2 " a kind of major loop structure of high-pressure vacuum breaker ", as shown in Figure 6, major loop comprises outlet 51, contact spring 59, vacuum interrupter 52, last bellows 582, last conducting rod 53, upper contact head 54, following contact 56, following bellows 581 reaches conducting rod 57 down, be provided with magnetic shell 55 in the vacuum interrupter 52, magnetic shell 55 is fixed in the outlet 51, contact spring 59 upper ends are fixed in the outlet 51, conducting rod 53 upper ends are fixed in its lower end, upper contact head 54 is fixed in conducting rod 53 lower ends, following contact 56 is fixed in the upper end of conducting rod 57 down, last bellows 582 is arranged on the conducting rod 53, following bellows 581 is arranged at down on the conducting rod 57, and following conducting rod 57 is connected with the operation circuit of circuit breaker.
The defective of above-mentioned major loop structure in the separating brake process mainly shows as: because contact spring 59 just is compressed in top, the targeting part of conducting rod is shorter, double swerve axially takes place so be everlasting when upper contact head 54 and 53 motions of last conducting rod, when cut-offfing big electric current, can produce bigger electric power, cause axial side force, cause in vacuum interrupter 54,56 contacts of upper and lower contact not good.Simultaneously, as shown in Figure 5, upper and lower structure of contact terminal is that upper and lower contact 54,56 contact-making surfaces are plane contact in the prior art, owing to can not contact well between the contact, produce skew, arc-rupturing capacity is poor, even can cause cut-offfing failure, these all make circuit breaker can not obtain good opening characteristic.
In addition, at present, high-pressure vacuum breaker first opens the phase arcing time and is generally 4-6ms, after open the phase arc extinguishing and will be 9-11ms, the separating brake time on earth is generally 8～12ms, after open the phase arcing time and many 5ms mutually than first opening.Open like this in the arc extinguishing district and just entered separating brake mechanical shock district on earth, the arc extinguishing environment is very abominable, and contact burning is serious naturally.Can be clear that after it is unfavorable for from the opening characteristic curve of Fig. 7 and to open cut-offfing of phase, a is the opening characteristic curve of known technology, in the contact run duration is the stage of t1=1-3ms, its distance of separation has only s1=0.5mm, characteristic curve is mild transition state, and the surperficial scaling loss to contact during separating brake is serious.Simultaneously, existing circuit breaker could contact the splitting lock cushioning device after two contacts separate about 6mm, and the actuating length of splitting lock cushioning device piston rod is generally about 18mm, cause opening velocity higher, the separating brake time on earth is shorter, is generally 8～12ms, opens when opening the phase arc extinguishing after causing apart from too big, the Chopping Current height is unfavorable for cut-offfing the little electric current of inductance; Separating brake on earth the time mechanical shock district with after open mutually arc extinguishing area overlapping, to after to open the phase blow-out unfavorable, to single-phase cut-off particularly serious, this especially circuit breaker can not obtain the major reason of good opening characteristic.
The utility model content
The purpose of this utility model is to overcome above defective, provide a kind of and can reduce rocking of upper contact head and last conducting rod, improve the axial feature that it moves up and down, can reduce simultaneously the scaling loss of contact and obtain opening characteristic stably, guarantee the high-pressure vacuum breaker of circuit breaker breaking current reliability.
For achieving the above object, the high-pressure vacuum breaker that the utility model provides comprises framework, main shaft, operating mechanism and four link assemblies thereof, major loop and splitting lock cushioning device, and described main shaft is connected with an end of described four link assemblies; Described major loop comprises upper bracket, goes up outlet, is flexible coupling, the contact spring, go up conducting rod, upper contact head, contact and conducting rod down down, the described conducting rod of going up passes described upper bracket, a described end that is flexible coupling is fixed in described upper end of going up conducting rod, the other end is connected with described upward outlet, the lower end of described contact spring be against described be flexible coupling on, described upper contact head is fixed in the described conducting rod lower end of going up, described contact down is fixed in the described upper end of conducting rod down, and the described lower end of conducting rod down is connected with the other end of described four link assemblies; Described splitting lock cushioning device comprises piston rod, described major loop also comprises the spring shield that is used for built-in described contact spring and is positioned at the guide post of described contact spring, described guide post lower end and the described conducting rod of going up are fixed together, described spring shield top center is provided with and the movable pilot hole that cooperates of described guide post, and the upper end of described contact spring is pressed in the top of described spring shield;
The described upper surface of contact down is a spherical arc, and the lower surface of described upper contact head is a spill cambered surface that matches with described spherical arc;
Described splitting lock cushioning device is installed in the bottom of described framework, and the stroke of described piston rod is 21-24mm, and the connecting lever that matches with described piston rod is installed on the described main shaft.
The utility model high-pressure vacuum breaker, wherein said spherical arc has a spherical interior surface, forms the gap between described spherical interior surface and the described spill cambered surface.
The utility model high-pressure vacuum breaker, the stroke of wherein said piston rod are 22.5mm.
The utility model high-pressure vacuum breaker, wherein said guide post lower end is provided with external screw thread, and last conducting rod upper end is provided with internal thread, and guide post and last conducting rod are fixed together by internal and external screw thread.
The utility model high-pressure vacuum breaker, wherein said contact spring and be flexible coupling between the contact spring abutment is installed.
The utility model high-pressure vacuum breaker is set with dead ring between the through hole of wherein said upward conducting rod and upper bracket.
The utility model high-pressure vacuum breaker is owing to set up guide post, extended the guiding length of last conducting rod, this structure can obviously reduce rocking of upper contact head and last conducting rod, has reduced the influence of axial side force, has improved its axial feature that moves up and down; And upper and lower contact contact-making surface changes the sphere contact into, and the contact contact surface is increased, and more helps blow-out during separating brake; Simultaneously, by changing the stroke of traditional splitting lock cushioning device piston rod, make the main shaft connecting lever after two contacts separate 2mm, contact the splitting lock cushioning device, reduce opening velocity, making the separating brake time on earth is about 20ms, these all make high-pressure vacuum breaker obtain opening characteristic stably, have guaranteed the reliability of high-pressure vacuum breaker breaking current, make the separating brake motion more meet the requirement of high-pressure vacuum breaker to electric property.
Below in conjunction with drawings and Examples the utility model is further specified.
Description of drawings
Fig. 1 is the front view of the utility model high-pressure vacuum breaker;
Fig. 2 is the right side partial sectional view of the utility model high-pressure vacuum breaker;
Fig. 3 is the local amplification view of A-A among Fig. 1;
Fig. 4 is the structure cutaway view ("on" position) of upper and lower contact;
Fig. 5 is the structure cutaway view ("on" position) of upper and lower contact in the prior art;
Fig. 6 is the structural principle schematic diagram of major loop "on" position in the prior art;
Fig. 7 is the utility model high-pressure vacuum breaker characteristic of switch and prior art killer switch feature separating brake characteristic curve diagram relatively.
Embodiment
Consult Fig. 1 and Fig. 2, the utility model high-pressure vacuum breaker comprises framework 1, main shaft 90, operating mechanism 60 and four link assemblies 603, major loop 80 and splitting lock cushioning device 10.Main shaft 90 is connected with an end of four link assemblies 603, and the other end of four link assemblies 603 is connected with major loop 80.
Major loop 80 comprises upper bracket 800, go up outlet 801, be flexible coupling 803, contact spring 802, the spring shield 804 that is used for built-in contact spring 802, contact spring abutment 8011, go up conducting rod 805, upper contact head 806, contact 807 and conducting rod 808 and be positioned at the guide post 8010 of contact spring 802 down down.Last conducting rod 805 passes the through hole of upper bracket 800, is set with dead ring 8012 between the through hole of last conducting rod 805 and upper bracket 800.803 the end of being flexible coupling is fixed in the upper end of conducting rod 805, and the other end is connected with last outlet 801.Spring shield 804 be fixed in upper bracket 800 above, spring shield 804 top center are provided with and the movable pilot holes that cooperate of guide post 8010, guide post 8010 upper ends are passed pilot hole and are cooperated with the pilot hole activity.Guide post 8010 lower ends are provided with external screw thread, and last conducting rod 805 upper ends are provided with internal thread, and guide post 8010 and last conducting rod 805 are fixed together by internal and external screw thread.The lower end of contact spring 802 is equipped with contact spring abutment 8011 and supports to be contained in and is flexible coupling on 803, and the other end is pressed in the top of spring shield 804.Upper contact head 806 is fixed in conducting rod 805 lower ends, and following contact 807 is fixed in the upper end of conducting rod 808 down, and the lower end of following conducting rod 808 is connected with four link assemblies 603.
The utility model high-pressure vacuum breaker is when on/off switch, and guide post 8010 slides up and down in the pilot hole of spring shield 804, thereby has increased the guiding length of last conducting rod 805.This structure can obviously reduce rocking of upper contact head and last conducting rod, has reduced the influence of axial side force, has improved its axial feature that moves up and down.
In the embodiment of the utility model high-pressure vacuum breaker, consult Fig. 4, the upper surface of following contact 807 is a spherical arc, the lower surface of upper contact head 806 is a spill cambered surface that matches with spherical arc, spherical arc has a spherical interior surface, form gap 809 between spherical interior surface and the spill cambered surface, gap 809 helps the Electric Field Distribution on the upper and lower contact contact-making surface more.Upper and lower contact contact-making surface changes sphere contact into, and the contact contact surface is increased, and this blow-out during to separating brake is more favourable.
Consult Fig. 3, splitting lock cushioning device 10 is installed in the bottom of framework 1, and splitting lock cushioning device 10 comprises piston rod 100, and the connecting lever 901 that matches with piston rod 100 is installed on the main shaft 90, and the stroke of piston rod 100 is h=21-24mm.In the utility model high-pressure vacuum breaker preferred embodiment, the stroke of piston rod 100 is h=22.5mm.
In the process that contact spring 802 discharges, by changing the stroke of traditional splitting lock cushioning device piston rod, make circuit breaker after two contacts separate 2mm, contact the splitting lock cushioning device, reduce opening velocity, making the separating brake time on earth is about 20ms, has alleviated the scaling loss of contact.The concrete course of work and characteristic forming process are as follows:
When the high-pressure vacuum breaker separating brake, the decrement of contact spring 802 discharges in advance, under its compression force, two contacts 806,807 move downward simultaneously, when two contacts begin to separate and during upper contact head 806 stop motions, following contact 807 has obtained certain initial velocity (V0＞0) and has continued motion, thereby has guaranteed that two contacts at the rapid movement that separates the 0-2mm stage, reach the purpose of rapid blow-out.Consult Fig. 7, b is the opening characteristic curve of the utility model high-pressure vacuum breaker, and in this course, high-pressure vacuum breaker opening characteristic curve b has obtained the leading portion that steepness increases.Then, under operating mechanism 60 separating brake power effects, contact 807 continued to move downward under main shaft 90 drove by four link assemblies 603, and in the position that separates about 2mm, the connecting lever 901 of main shaft 90 contacts with piston rod 100 tops of splitting lock cushioning device 10.Because high-pressure vacuum breaker guarantees movement velocity at two contacts contact 807 under separately 3～4mm reduced on the stage by the piston rod 100 that stroke is improved to h=22.5mm, so when connecting lever 901 with after piston rod 100 tops of splitting lock cushioning device 10 contact, splitting lock cushioning device 10 reduces the movement velocity of contact 807, so that separating brake time dimension on earth is held within 16～25ms, thus make high-pressure vacuum breaker after open and obtained disjunction environment more stably mutually.In this course, high-pressure vacuum breaker opening characteristic curve b has obtained back segment stably, has guaranteed the reliability of high-pressure vacuum breaker breaking current, makes the separating brake motion more meet the requirement of high-pressure vacuum breaker to electric property.
The above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model all should fall in the definite protection range of claims of the present utility model.
Claims (6)
1, a kind of high-pressure vacuum breaker comprises framework (1), main shaft (90), operating mechanism (60) and four link assemblies (603) thereof, major loop (80) and splitting lock cushioning device (10), and described main shaft (90) is connected with an end of described four link assemblies (603); Described major loop (80) comprises upper bracket (800), last outlet (801), (803) are flexible coupling, contact spring (802), last conducting rod (805), upper contact head (806), following contact (807) reaches conducting rod (809) down, described upward conducting rod (805) passes the through hole of described upper bracket (800), one end of described be flexible coupling (803) is fixed in described upper end of going up conducting rod (805), the other end of described be flexible coupling (803) is connected with described upward outlet (801), the lower end of described contact spring (802) is against on described be flexible coupling (803), described upper contact head (806) is fixed in described conducting rod (805) lower end of going up, described contact (807) down is fixed in the described upper end of conducting rod (808) down, and the described lower end of conducting rod (808) down is connected with the other end of described four link assemblies (603); Described splitting lock cushioning device (10) comprises piston rod (100), it is characterized in that:
Described major loop (80) also comprises spring shield (804) that is used for built-in described contact spring (802) and the guide post (8010) that is positioned at described contact spring (802), described spring shield (804) be fixed in described upper bracket (800) above, described guide post (8010) lower end and the described conducting rod (805) of going up are fixed together, described spring shield (804) top center is provided with and the movable pilot hole that cooperates of described guide post (8010), and the upper end of described contact spring (802) is pressed in the top of described spring shield (804);
The described upper surface of contact (807) down is a spherical arc, and the lower surface of described upper contact head (806) is a spill cambered surface that matches with described spherical arc;
Described splitting lock cushioning device (10) is installed in the bottom of described framework (1), and the stroke of described piston rod (100) is 21-24mm, and the connecting lever (901) that matches with described piston rod (100) is installed on the described main shaft (90).
2, high-pressure vacuum breaker as claimed in claim 1 is characterized in that: wherein said spherical arc has a spherical interior surface, forms gap (809) between described spherical interior surface and the described spill cambered surface.
3, high-pressure vacuum breaker as claimed in claim 1 or 2 is characterized in that: the stroke of wherein said piston rod (100) is 22.5mm.
4, high-pressure vacuum breaker as claimed in claim 3, it is characterized in that: wherein said guide post (8010) lower end is provided with external screw thread, described conducting rod (805) upper end of going up is provided with internal thread, and described guide post (8010) is fixed together by internal and external screw thread with the described conducting rod (805) of going up.
5, high-pressure vacuum breaker as claimed in claim 4 is characterized in that: wherein said contact spring (802) and be flexible coupling contact spring abutment (8011) is installed between (803).
6, high-pressure vacuum breaker as claimed in claim 5 is characterized in that: be set with dead ring (8012) between the through hole of wherein said upward conducting rod (805) and upper bracket (800).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920107544U CN201392768Y (en) | 2009-04-24 | 2009-04-24 | High-voltage vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920107544U CN201392768Y (en) | 2009-04-24 | 2009-04-24 | High-voltage vacuum circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201392768Y true CN201392768Y (en) | 2010-01-27 |
Family
ID=41599590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920107544U Expired - Fee Related CN201392768Y (en) | 2009-04-24 | 2009-04-24 | High-voltage vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201392768Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527223B (en) * | 2009-04-24 | 2012-05-23 | 北京华东森源电气有限责任公司 | High-voltage vacuum breaker |
| CN103198963A (en) * | 2012-04-17 | 2013-07-10 | 苏州朗格电气有限公司 | Vacuum circuit breaker |
| CN111492454A (en) * | 2017-12-21 | 2020-08-04 | Abb瑞士股份有限公司 | Method for operating a drive of a vacuum interrupter and vacuum interrupter itself |
-
2009
- 2009-04-24 CN CN200920107544U patent/CN201392768Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527223B (en) * | 2009-04-24 | 2012-05-23 | 北京华东森源电气有限责任公司 | High-voltage vacuum breaker |
| CN103198963A (en) * | 2012-04-17 | 2013-07-10 | 苏州朗格电气有限公司 | Vacuum circuit breaker |
| CN111492454A (en) * | 2017-12-21 | 2020-08-04 | Abb瑞士股份有限公司 | Method for operating a drive of a vacuum interrupter and vacuum interrupter itself |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20120424 |