CN113140429A - Double-acting circuit breaker - Google Patents
Double-acting circuit breaker Download PDFInfo
- Publication number
- CN113140429A CN113140429A CN202010060179.5A CN202010060179A CN113140429A CN 113140429 A CN113140429 A CN 113140429A CN 202010060179 A CN202010060179 A CN 202010060179A CN 113140429 A CN113140429 A CN 113140429A
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- China
- Prior art keywords
- moving contact
- circuit breaker
- contacts
- driven
- double
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004146 energy storage Methods 0.000 claims abstract description 30
- 230000003139 buffering effect Effects 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 239000000872 buffer Substances 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
Abstract
The invention relates to the field of high-voltage switches, in particular to a double-acting circuit breaker, which comprises a circuit breaker shell, wherein a driving moving contact and a driven moving contact are arranged in the circuit breaker shell; the two contacts are oppositely arranged, a transmission structure is connected between the two contacts, and when the driving moving contact moves, the driving moving contact is driven to move; at least one of the two contacts is connected with a buffering energy storage structure so as to perform buffering energy storage at the tail end of a closing stroke and release energy at the initial stage of an opening stroke. At the end of the closing stroke, the closing buffering energy storage structure buffers the movement of the contacts, so that the movement speed of the two contacts at the end of the closing stroke is reduced, the phenomenon that the two contacts generate large vibration due to overlarge relative speed when closing is avoided, and the service life of the circuit breaker is prolonged. In addition, the closing buffer structure realizes buffering and simultaneously stores energy, and the energy in the buffer energy storage structure is released during opening, so that the driving moving contact and the driven moving contact are pushed to be quickly separated, and the circuit breaker can quickly complete opening.
Description
Technical Field
The invention relates to the field of high-voltage switches, in particular to a double-acting circuit breaker.
Background
A circuit breaker, one of the most important devices of an electric power system, mainly serves two functions in the grid, namely control and protection. When the power grid needs, the function of putting a certain line into or out of an operating state is called as the control function of the breaker; when a power grid fails, a fault line is isolated from a normal line in time, and the function of protecting the normal operation of other equipment is called as the protection function of a circuit breaker. Since these two functions of the circuit breaker in the power grid are very critical to the normal operation of the power grid, the stability and reliability of the circuit breaker itself are important guarantees for the operation of the power grid.
At present, the circuit breaker is developed towards miniaturization and light weight, the operating work of the circuit breaker in the opening and closing process is reduced, the dynamic characteristics of a contact are improved, and the current main design pursuit of the circuit breaker is obtained. Therefore, a double-acting circuit breaker with two contacts capable of performing switching on and off actions appears in the market successively, for example, as disclosed in chinese patents with publication number CN206849755U and publication number CN101587783A, one of the two contacts of the circuit breaker is a driving moving contact, the other is a driven moving contact, a transmission structure is connected between the driving moving contact and the driven moving contact, and the driving moving contact is linked with the driven moving contact through the transmission structure when acting, and the driving moving contact and the driven moving contact are moved back to back or relatively to realize switching on and off actions.
In actual use, the two contacts of the double-acting circuit breaker are switched on and off, so that the relative speed is high when the two contacts are switched on at the tail section of the switching-on action, and the two contacts vibrate greatly, so that the structural stability of the fracture position of the whole circuit breaker is greatly influenced, and the service life of the circuit breaker is shortened to a certain extent.
Disclosure of Invention
The invention aims to provide a double-acting circuit breaker, which is used for solving the problem that the service life of the circuit breaker is influenced by severe vibration between contacts when the existing double-acting circuit breaker is switched on.
In order to solve the technical problem, the double-acting circuit breaker adopts the following technical scheme:
a double-acting circuit breaker comprises a circuit breaker shell, wherein a driving moving contact and a driven moving contact are arranged in the circuit breaker shell; the two contacts are oppositely arranged, a transmission structure is connected between the two contacts, and when the driving moving contact moves, the driving moving contact is driven to move; at least one of the two contacts is connected with a buffering energy storage structure so as to perform buffering energy storage at the tail end of a closing stroke and release energy at the initial stage of an opening stroke.
The beneficial effects are that: at the end of the closing stroke, the closing buffering energy storage structure buffers the movement of the contacts, so that the movement speed of the two contacts at the end of the closing stroke is reduced, the phenomenon that the two contacts generate large vibration due to overlarge relative speed when closing is avoided, and the service life of the circuit breaker is prolonged. In addition, the closing buffer structure realizes buffering and simultaneously stores energy, and the energy in the buffer energy storage structure is released during opening, so that the driving moving contact and the driven moving contact are pushed to be quickly separated, and the circuit breaker can quickly complete opening.
Further, the buffering energy storage structure is a spring buffering energy storage structure.
The beneficial effects are that: the spring buffering energy storage structure is simple in structure, and therefore the breaker can be simple in structure by adopting the spring buffering energy storage structure as the buffering energy storage structure.
Further, the spring buffering and energy storing structure is a compression spring acting between the contact and the shell of the circuit breaker.
The beneficial effects are that: adopt the pressure spring as spring buffer structure, the pressure spring is compressed when playing the cushioning effect, and occupation space is littleer for the structure of circuit breaker is compacter.
Furthermore, the transmission structure is a plane link mechanism, the plane link mechanism comprises a connecting rod hinged with the active moving contact and a crank hinged with the breaker shell, the crank is provided with extending parts on two sides of a hinged point, one side of the driven moving contact, which faces away from the active moving contact, is connected with a guide section matched with the guide structure in the breaker shell in a guide way, the crank is hinged with the guide section through a sliding block arranged on the crank, and when the crank is driven by the connecting rod to rotate, the driven moving contact is pushed to move through the sliding block.
The beneficial effects are that: by adopting the plane link mechanism, stable and reliable transmission can be realized between the two contacts with simple structure.
Further, the buffering energy storage structure is arranged on the guide section and is positioned between the sliding block and the driven moving contact.
The beneficial effects are that: the guide section is utilized to arrange the buffering energy storage structure, so that the structure of the double-acting circuit breaker is more compact.
Furthermore, the buffer energy storage structure is a pressure spring sleeved on the guide section, the guide section is provided with a spring seat, and two ends of the pressure spring are pressed between the spring seat and the guide structure.
The beneficial effects are that: the compression spring suit is as buffering energy storage structure on the direction section for buffering energy storage structure has simple structure, avoids the circuit breaker structure to complicate.
Furthermore, a driven moving contact in the two contacts is connected with the buffering energy storage structure.
The beneficial effects are that: the buffering energy storage structure is connected with the driven moving contact, so that the vibration of the driven moving contact induced by gaps among the connecting structures is favorably reduced, and the smooth joint of the driven moving contact and the driving moving contact is ensured.
Drawings
Fig. 1 is a schematic view of a transmission structure between a driving moving contact and a driven moving contact in embodiment 1 of the double-acting circuit breaker of the present invention;
in the figure: 1-active moving contact; 2-driven moving contact; 3-a connecting rod; 4-a crank; 5-a slide block; 6-pressure spring; 7-spring seat.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
Be provided with transmission structure between initiative moving contact 1 and the driven moving contact 2, when initiative moving contact 1 removed, can drive the action of driven moving contact 2 through transmission structure. In this embodiment, the transmission structure is a planar linkage mechanism, and specifically, as shown in fig. 1, includes a connecting rod 3, a crank 4, and a slider 5.
Wherein, connecting rod 3 one end and initiative contact 1 swing joint, other one end and the one end swing joint of crank 4, crank 4 is fixed to be articulated on the circuit breaker casing, all has the extension in the both sides of its pin joint, and the contained angle between the extension of both sides is the obtuse angle, and slider 5 slidable mounting is on the other end of crank 4, and simultaneously, slider 5 and driven moving contact 2's direction section swing joint. In other embodiments, the crank 4 may be replaced by a straight rod, the middle of which is fixedly hinged to the housing of the circuit breaker.
In order to prevent the two contacts from generating large vibration due to too high speed when switching on, a buffer energy storage structure is further installed on the guide section of the driven moving contact 2 and is specifically positioned between the sliding block 5 and the driven moving contact 2.
In this embodiment, the buffering energy storage structure is a spring buffering energy storage structure, specifically is a pressure spring 6 sleeved on the guide section of the driven moving contact 2, and correspondingly, a spring seat 7 is fixed on the guide section of the driven moving contact 2. At the end of the closing stroke, the driven moving contact 2 applies pressure to the pressure spring 6 through the spring seat 7, and the pressure spring 6 is compressed between the spring seat 7 and a guide structure matched with a guide section of the driven moving contact 2.
In the closing stage, a driving mechanism of the circuit breaker drives the driving moving contact 1 to move from the opening position to the driven moving contact 2, the driving moving contact 1 pushes the crank 4 to rotate around a hinge point fixed on the frame through the connecting rod 3 and drives the sliding block 5 to rotate and move in the same direction, under the drive of the sliding block 5 and the restraint of the guide structure, the driven moving contact 2 moves towards the position of the driving moving contact 1, so that the driving moving contact 1 and the driven moving contact 2 move in opposite directions, at the tail end of a closing stroke, the pressure spring 6 is compressed, providing thrust to the driven moving contact 2 back to the driving moving contact 1, buffering the motion of the driven moving contact 2, meanwhile, the driven moving contact 2 limits the movement speed of the driving moving contact 1 in turn through a transmission structure, so that the stable switching on of the two contacts is realized, and the large vibration generated when the two contacts are plugged is avoided. And energy storage is realized by the pressure spring 6 while buffering is carried out.
At the separating brake stage, actuating mechanism drive initiative moving contact 1 moves from the moving of driven moving contact 2, initiative moving contact 2 passes through connecting rod 3 pulling crank 4 and rotates around its pin joint of fixing in the frame, and drive slider 5 syntropy and rotate and remove, under the drive of slider 5 with the guide structure direction, the position that driven moving contact 2 orientation deviates from initiative moving contact 1 place removes, and simultaneously, the beginning of separating brake stroke, the elastic potential energy is released to pressure spring 6, provide the thrust of initiative moving contact 1 from the back to driven moving contact 5, under circuit breaker drive arrangement and the common drive of pressure spring 6, accomplish the separating brake fast.
In other embodiments, the pressure spring may also be sleeved on the guide section of the active moving contact, and correspondingly, a spring seat is fixed on the guide section of the active moving contact. Of course, the guide sections of the two contacts can be sleeved with compression springs. Of course, a tension spring can be further arranged as a spring buffering energy storage structure, specifically, two ends of the tension spring are respectively connected to the corresponding contact and the breaker shell, at the end of the closing stroke, the tension spring is pulled to deform to provide a pulling force opposite to the inserting and closing direction for the contact, energy storage is achieved at the same time, and when the contact is opened, the contact is forced to be quickly opened by the pulling force of the tension spring. Of course, a rubber block can be sleeved on the transmission section of the contact to serve as a buffering energy storage structure.
The embodiment 2 of the double-acting circuit breaker is different from the embodiment 1 in that in the embodiment, a slide block is not arranged on a crank arm, but a long hole is arranged on the crank arm, the length extending direction of the long hole is consistent with that of the crank arm, correspondingly, a transmission pin is fixed on a guide section of a driven moving contact, the transmission pin is matched with the long hole in a plug-in mode, when the switch is switched on and off, the crank arm drives the driven moving contact to move through the transmission pin, and meanwhile, the transmission pin can slide in the long hole.
An embodiment 4 of the double-acting circuit breaker is different from the above embodiments in that a piston type energy accumulator is arranged between a guide section of a driven moving contact and a breaker shell, the extending direction of the piston axis of the piston type energy accumulator is the same as the reciprocating moving direction of the driven moving contact and is in transmission connection with the driven moving contact, when the circuit breaker is switched on, the driven moving contact drives a piston of the piston type energy accumulator to contract inwards a cylinder, meanwhile, the energy accumulator stores energy and simultaneously buffers the movement of a contact, and when the circuit breaker is switched off, the energy accumulator releases energy to promote the two contacts to be rapidly switched off.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (7)
1. A double-action circuit breaker comprising:
the circuit breaker comprises a circuit breaker shell, a driving moving contact and a driven moving contact, wherein the driving moving contact and the driven moving contact are arranged in the circuit breaker shell;
the two contacts are oppositely arranged, a transmission structure is connected between the two contacts, and when the driving moving contact moves, the driving moving contact is driven to move;
the method is characterized in that:
at least one of the two contacts is connected with a buffering energy storage structure so as to perform buffering energy storage at the tail end of a closing stroke and release energy at the initial stage of an opening stroke.
2. The double action circuit breaker according to claim 1, characterized in that the energy storing buffer structure is a spring energy storing buffer structure.
3. A double-action circuit breaker according to claim 2, characterized in that the spring-damper energy-storage structure is a compression spring acting between the contact and the breaker housing.
4. The double-acting circuit breaker according to claim 1, characterized in that the transmission structure is a planar linkage mechanism, the planar linkage mechanism comprises a connecting rod hinged to the active moving contact, and a crank hinged to the breaker housing, the crank has extensions on both sides of its hinge point, one side of the driven moving contact facing away from the active moving contact is connected to a guide section in guiding engagement with the guide structure in the breaker housing, the crank is hinged to the guide section by means of a slider mounted thereon, and the driven moving contact is pushed by the slider to move when the crank is driven to rotate by the connecting rod.
5. The double-action circuit breaker according to claim 4, characterized in that the energy-storing buffer structure is arranged on the guide section between the slider and the movable contact.
6. The double-acting circuit breaker according to claim 5, characterized in that the energy-storing buffer structure is a compression spring sleeved on the guide section, a spring seat is arranged on the guide section, and two ends of the compression spring are pressed between the spring seat and the guide structure.
7. A double-action circuit breaker according to claim 1, characterized in that the driven moving contact of the two contacts is connected to the energy-storing buffer structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010060179.5A CN113140429A (en) | 2020-01-19 | 2020-01-19 | Double-acting circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010060179.5A CN113140429A (en) | 2020-01-19 | 2020-01-19 | Double-acting circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113140429A true CN113140429A (en) | 2021-07-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010060179.5A Pending CN113140429A (en) | 2020-01-19 | 2020-01-19 | Double-acting circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113140429A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114429882A (en) * | 2022-04-06 | 2022-05-03 | 宁波天安智能电网科技股份有限公司 | Double-acting switch device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005108766A (en) * | 2003-10-01 | 2005-04-21 | Nissin Electric Co Ltd | Double-break vacuum circuit breaker |
| CN201956269U (en) * | 2011-04-12 | 2011-08-31 | 浙宝开关(杭州)有限公司 | Rapid permanent magnetic vacuum switch |
| CN102184795A (en) * | 2011-04-12 | 2011-09-14 | 浙宝开关(杭州)有限公司 | Fast vacuum circuit breaker used for protecting high-power power electronic converter |
| CN104299862A (en) * | 2014-06-27 | 2015-01-21 | 国家电网公司 | Buffer and circuit breaker operating mechanism using the same |
| CN104576175A (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | High-voltage double-break circuit breaker |
| CN204303672U (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | A kind of transmission mechanism for double-fracture breaker |
| CN204303716U (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | A kind of two moving contact circuit breaker |
| CN206849755U (en) * | 2017-06-19 | 2018-01-05 | 国网江苏省电力公司盐城供电公司 | The primary cut-out of synchronization double-action contact |
| CN208873658U (en) * | 2018-09-29 | 2019-05-17 | 杭州佰盟智能开关有限公司 | A kind of device reducing speed vacuum circuit breaker closing rebound and impact |
| CN109786175A (en) * | 2018-12-26 | 2019-05-21 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of porcelain knob breaker dynamic micro-model of interior visible |
| CN209104066U (en) * | 2018-11-09 | 2019-07-12 | 许继电气股份有限公司 | A kind of breaker |
-
2020
- 2020-01-19 CN CN202010060179.5A patent/CN113140429A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005108766A (en) * | 2003-10-01 | 2005-04-21 | Nissin Electric Co Ltd | Double-break vacuum circuit breaker |
| CN201956269U (en) * | 2011-04-12 | 2011-08-31 | 浙宝开关(杭州)有限公司 | Rapid permanent magnetic vacuum switch |
| CN102184795A (en) * | 2011-04-12 | 2011-09-14 | 浙宝开关(杭州)有限公司 | Fast vacuum circuit breaker used for protecting high-power power electronic converter |
| CN104299862A (en) * | 2014-06-27 | 2015-01-21 | 国家电网公司 | Buffer and circuit breaker operating mechanism using the same |
| CN104576175A (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | High-voltage double-break circuit breaker |
| CN204303672U (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | A kind of transmission mechanism for double-fracture breaker |
| CN204303716U (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | A kind of two moving contact circuit breaker |
| CN206849755U (en) * | 2017-06-19 | 2018-01-05 | 国网江苏省电力公司盐城供电公司 | The primary cut-out of synchronization double-action contact |
| CN208873658U (en) * | 2018-09-29 | 2019-05-17 | 杭州佰盟智能开关有限公司 | A kind of device reducing speed vacuum circuit breaker closing rebound and impact |
| CN209104066U (en) * | 2018-11-09 | 2019-07-12 | 许继电气股份有限公司 | A kind of breaker |
| CN109786175A (en) * | 2018-12-26 | 2019-05-21 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of porcelain knob breaker dynamic micro-model of interior visible |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114429882A (en) * | 2022-04-06 | 2022-05-03 | 宁波天安智能电网科技股份有限公司 | Double-acting switch device |
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Application publication date: 20210720 |
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