CN113130251A - Pulse type contactor - Google Patents
Pulse type contactor Download PDFInfo
- Publication number
- CN113130251A CN113130251A CN202110426688.XA CN202110426688A CN113130251A CN 113130251 A CN113130251 A CN 113130251A CN 202110426688 A CN202110426688 A CN 202110426688A CN 113130251 A CN113130251 A CN 113130251A
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- China
- Prior art keywords
- pull rod
- energy storage
- pulsed
- contactor
- spring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a pulse type contactor which is characterized by comprising a vacuum arc extinguish chamber, an insulating pull rod, a stroke spring, a transmission pull rod, a brake separating spring, a driving mechanism, an energy storage element and a controller. The invention has the technical effects that the brake is opened without a controller sending a brake opening instruction, and the brake is automatically opened by a brake opening spring, so that the invention is safe and reliable.
Description
Technical Field
The invention belongs to the technical field of power supply and distribution, and particularly relates to a pulse type contactor.
Background
With the rapid development of industrialization and urbanization in China, the power demand will continuously increase in a long time, the development task of the power grid is heavy, and the faults and problems of the power grid are also endless.
The existing system for throwing the common contactor into the market has a plurality of problems, the common contactor is slow in action speed and affects processing time and effect, in addition, the common contactor is required to act after a controller sends a brake-breaking instruction, the processing equipment is prolonged in throwing time into the system, equipment cost and volume are increased, energy loss is increased, a mechanism brake is easy to lose efficacy, equipment is burnt, and accidents are increased.
Also adopt high-voltage silicon controlled rectifier to establish ties and be used for equipment to drop into, but also have a great deal of problems, high-voltage silicon controlled rectifier is withstand voltage not enough, needs the multiunit to establish ties, and withstand voltage protection is needed to be done to every silicon controlled rectifier, guarantees that the silicon controlled rectifier and switches on the insulation breakdown who causes asynchronously, leads to the structure complicacy, and control system also requires extremely high, even if do a great deal of protection, the accident also often takes place, if the silicon controlled rectifier that the multiunit was established ties has arbitrary one to take place to do not move or refuse.
Disclosure of Invention
The invention aims to provide a pulse type contactor to solve the problems that the existing contactor in the background art is slow in action time, needs a controller to send instructions for opening a brake and is long in duration time, and a series of problems caused by series connection of high-voltage thyristors.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an impulse type contactor, draws, separating brake spring, actuating mechanism, energy storage component and controller including vacuum interrupter, insulating pull rod, stroke spring, transmission, vacuum interrupter lower extreme links to each other with insulating pull rod, vacuum interrupter's one end and stroke spring coupling are kept away from to insulating pull rod, the stroke spring is connected with the transmission pull rod, transmission pull rod and separating brake spring coupling, separating brake spring's the other end is connected with the driving machine, actuating mechanism is connected with the energy storage component electricity, the energy storage component is connected with the controller electricity.
Preferably, the vacuum interrupter is located at a top end of the contactor housing.
Preferably, the vacuum arc-extinguishing chamber comprises a switch component, the switch component comprises a moving contact and a fixed contact, the moving contact is connected with the insulating pull rod, and the switch component is used for executing the opening and closing actions of the circuit when the circuit works normally or breaks down.
Preferably, the insulating pull rod comprises a core rod and an insulating sleeve, blind holes are formed in two ends of the core rod respectively, the insulating sleeve is sleeved outside the core rod, and a plurality of layers of skirt edges are arranged on the middle of the outer surface of the insulating sleeve at equal intervals, so that the creepage distance can be increased.
Preferably, the drive mechanism is fixed to the bottom end of the contactor housing.
Preferably, the driving mechanism comprises one or more of a repulsion mechanism, an electromagnetic mechanism and a permanent magnetic mechanism.
Preferably, the method of maintaining the on/off state of the drive mechanism includes at least one of: magnetic holding, elastic element holding, and mechanical latching holding.
Preferably, the energy storage element comprises one or more combinations of a capacitor and a battery.
Preferably, the control circuit in the controller comprises a plurality of fast energy storage elements and a plurality of fast control switches corresponding to the fast energy storage elements, wherein each fast energy storage element and each fast control switch are connected in series with one driving coil in the plurality of driving coils, and the plurality of fast control switches control the plurality of fast energy storage elements to discharge the plurality of driving coils simultaneously when the circuit fails so as to control the current flowing through the plurality of driving coils and the change rate thereof.
The invention has the technical effects and advantages that: compared with the prior art, the pulse contactor has the advantages that compared with an ordinary contactor, the switching-off is not required to be sent by a controller to perform switching-off instructions, the switching-off is automatically switched off by a switching-off spring, safety and reliability are realized, a quick driving mechanism is adopted, the problem that the switching-on time of the ordinary contactor is slow can be solved, compared high-voltage silicon controlled rectifiers, the through-flow capacity is large, the structure and control are simple, the safety and reliability are high, and the cost is low.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1-a vacuum arc-extinguishing chamber; 2-insulating pull rod; 3-a stroke spring; 4-a brake-separating spring; 5-a drive mechanism; 6-an energy storage element; 7-a controller; 8-driving the pull rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a pulse type contactor, which comprises a vacuum arc extinguish chamber 1, an insulating pull rod 2, a stroke spring 3, a transmission pull rod 8, a separating brake spring 4, a driving mechanism 5, an energy storage element 6 and a controller 7, wherein the vacuum arc extinguish chamber 1 is positioned at the top end of a contactor shell, the lower end of the vacuum arc extinguish chamber 1 is connected with the insulating pull rod 2, one end of the insulating pull rod 2, which is far away from the vacuum arc extinguish chamber 1, is connected with the stroke spring 3, the other end of the stroke spring 3 is connected with the transmission pull rod 8, the transmission pull rod 8 is connected with the separating brake spring 4, the other end of the separating brake spring 4 is connected with the driving mechanism 5, the vacuum arc extinguish chamber 1 is connected with the driving mechanism 5 through the insulating pull rod 2, and the driving mechanism 5 is fixed at the bottom end; meanwhile, the energy storage element 6 is electrically connected with the driving mechanism 5 and the controller 7.
Specifically, as shown in fig. 1, vacuum interrupter 1 is connected with actuating mechanism 5 through insulating pull rod 2, actuating mechanism 5 is fixed in contactor shell bottom, be provided with stroke spring 3 and separating brake spring 4 between insulating pull rod 2 and the actuating mechanism 5, still be provided with transmission pull rod 8 between stroke spring 3 and the separating brake spring 4, transmission pull rod 8 is used for the flexonics between stroke spring 3 and the separating brake spring 4 to be axial motion along vertical direction, separating brake spring 4 sets up in actuating mechanism 5, the 5 lower extremes of actuating mechanism is repulsion actuating mechanism 5, and the upper end of actuating mechanism 5 is separating brake spring 4, and energy storage component 6 is connected with actuating mechanism 5 and controller 7 electricity. When the controller 7 sends an action instruction, the energy storage element 6 releases energy to the driving mechanism 5, so that the driving mechanism 5 pushes the insulating pull rod 2 and the moving contact to move upwards to realize closing and conducting a circuit, and at the moment, the stroke spring 3 pushes the insulating pull rod 2 to move upwards; and simultaneously, the opening spring 4 is stored with energy, the energy release of the energy storage element 6 is finished, and the opening spring 4 releases the stored energy to drive the driving mechanism 5 to move downwards, so that the automatic reset is realized.
The vacuum arc extinguish chamber 1 comprises a switch assembly, the switch assembly comprises a moving contact and a fixed contact, the moving contact is connected with the insulating pull rod 2, and the switch assembly is used for executing the opening and closing actions of the circuit when the circuit works normally or breaks down.
Specifically, in the present embodiment, the vacuum interrupter 1 is composed of an insulating housing, a contact, a conductive rod, a shielding case, a guide sleeve, and other parts. The contact comprises a moving contact and a fixed contact, the moving contact is fixedly connected with a moving conducting rod, the end part of the fixed contact is connected with a fixed conducting rod, and the fixed conducting rod is an inner contact and an electric conductor connected with a main loop. The shell of the vacuum arc extinguish chamber 1 is a vacuum container and an insulator between the moving contact and the static contact, and the moving conducting rod can axially move within a certain range without damaging the air tightness of the shell. The shielding case mainly plays a role in shielding metal vapor and metal liquid drops generated in the opening and closing process of the contacts, and vacuum arcs among the contacts enable contact materials to generate metal vapor and metal liquid drops (arc products) to be sprayed to the periphery in the opening and closing process of the contacts, and the arc products are mainly deposited on the inner surface of the shielding case. Without the shield, arc products can deposit on the insulating housing, destroying the insulation of the housing. The shield also prevents arc products from reflecting back into the contact gap, causing post-arc restrike and re-strike. The shielding case can also make the electric field distribution inside the vacuum arc-extinguishing chamber 1 more uniform, thereby improving the insulation level of the vacuum arc-extinguishing chamber 1. One end of the static conductive rod is fixedly connected with the static contact into a whole, and the other end of the static conductive rod is connected with the fixing plate. The fixing plate is used for fixing the vacuum arc-extinguishing chamber 1 on the vacuum circuit breaker and connecting the static conducting rod of the vacuum arc-extinguishing chamber 1 with the main loop. One end of the movable conducting rod is connected with the movable contact through brazing, the movable conducting rod penetrates through the guide sleeve and extends out of the shell, and the diameter of the extending part of the movable conducting rod is smaller, so that the movable conducting rod is used for installing the conducting clip. The center of the end part is provided with a screw hole which is used for being connected with a mechanical operation system, and the movable conducting rod drives the movable contact to move along the axial direction to complete the closing and opening movement. The guide sleeve mainly ensures that the movable guide rod performs linear motion, and prevents the movable conducting rod from twisting so as to damage the corrugated pipe, so that the arc extinguish chamber is subjected to vacuum leakage.
In the vacuum arc-extinguishing chamber 1, the lower end of the movable conducting rod is connected with an insulating pull rod 2, the insulating pull rod 2 comprises a core rod and an insulating sleeve, blind holes are formed in two ends of the core rod respectively, the insulating sleeve is sleeved outside the core rod, and multiple layers of skirt edges are arranged on the outer surface of the insulating sleeve at intervals and the like. Wherein, the core rod is made by vacuum pouring epoxy resin, and both ends are respectively provided with blind holes; the connecting piece is a metal sleeve and is provided with internal threads, is embedded in blind holes at two ends of the core rod and is used for connecting the conducting rod and the operating arm; the silica gel sleeve is provided with three layers of skirt edges, so that the creepage distance can be increased, and the normal operation of the vacuum contactor under the conditions of condensation and dirt can be met. The skirt edge is formed by die-casting composite silicon rubber outside the core rod through a bonding material coated on the core rod, so that the insulating sleeve and the core rod are bonded into a whole, and the insulating sleeve and the six layers of skirt edges are formed in one step. The bonding material is HE-205 epoxy resin glue. The lower end of the insulating pull rod 2 is connected with the driving mechanism 5 and is used for being disconnected or contacted with the static contact under the driving of the driving mechanism 5, so that the opening and closing actions of the circuit are realized.
Due to the design of the opening spring 4, the transmission pull rod 8 and the stroke spring 3, when the contactor is switched on, the driving mechanism 5 drives the opening spring 4, the stroke spring 3 and the insulation pull rod 2 on the opening spring to move upwards, the top end of the stroke spring 3 collides with the insulation pull rod 2 before the vacuum moving contact is about to contact the vacuum static contact to complete the switching-on action, the kinetic energy of the driving mechanism 5 is absorbed and released by the opening spring 4 and the stroke spring 3, and the strong collision between the vacuum moving contact and the vacuum static contact is prevented. When the contactor is opened, the opening spring 4 is elastically contracted, the opening spring 4 drives the driving mechanism 5 to move downwards, and the opening spring 4 pulls the insulating pull rod 2 to move downwards to complete automatic reset. In order to avoid the pulling of the elastic force of the opening spring 4 and the stroke spring 3, a flexible buffer device, namely a transmission pull rod 8, is arranged between the opening spring 4 and the stroke spring 3.
After the structure of the transmission pull rod 8 is adopted, when the contactor is switched on, the transmission pull rod 8 not only plays a limiting role, but also avoids bounce caused by strong collision between the vacuum moving contact and the static contact; when the contactor is opened, the stroke spring 3 absorbs the kinetic energy of the insulating pull rod 2 after moving downwards in place and cooperates with the transmission pull rod 8, so that the rebound motion of the driving mechanism 5 is avoided, and the arc discharge phenomenon caused by the rebound of the vacuum moving contact between the vacuum moving contact and the static contact is avoided. The service life of the contactor is greatly prolonged, the energy storage energy of the energy storage element 6 and the stroke spring 3 can be adjusted, the rigid time (namely, the loop on time) and the holding time (namely, the loop on-off time) can be adjusted by controlling the energy charging time of the energy storage element 6 and the elastic deformation of the stroke spring 3, and the pulse type on-loop with various requirements is realized.
The energy storage element 6 is electrically connected with the driving mechanism 5 and the controller 7. Specifically, the energy storage element comprises one or more combinations of a capacitor and a battery. The energy storage element 6 supplies energy to the drive 5. In actual operation, the controller 7 sends an action instruction, the energy storage element 6 releases energy to the driving mechanism 5, so that the driving mechanism 5 pushes the insulating pull rod 2 and the vacuum bubble moving contact to move upwards, a closing conduction circuit is realized, energy is stored for the opening spring 4, the energy release of the energy storage element 6 is finished, and the opening spring 4 enables the driving mechanism 5 to move downwards, and automatic reset is completed.
The driving mechanism 5 comprises one or more driving coils and is used for driving the action of the switch component; the driving mechanism 5 comprises one or more of a repulsion mechanism, an electromagnetic mechanism and a permanent magnetic mechanism. The method for maintaining the opening/closing state of the driving mechanism 5 includes at least one of the following: magnetic holding, elastic element holding, and mechanical latching holding.
The driving mechanism 5 adopts a repulsion mechanism of the quick switch, and the opening and closing movement strength of the repulsion mechanism is high, so that the fatigue damage during long-time use is caused, and the service life and the safety of the quick switch are reduced. In the embodiment of the invention, the control circuit in the controller 7 controls the current and the change rate thereof flowing through the driving coil of the driving mechanism 5 according to different operating conditions of the circuit, so that the switching component executes the opening action and the closing action (opening and closing action) of the circuit at the most appropriate speed, namely the combination of the rapid opening and closing action and the normal-speed opening and closing action is realized. Because the number of rapid opening and closing actions is reduced, the probability of fatigue damage is reduced, and the service life and the safety of the switch are ensured.
The driving mechanism 5 can also adopt an electromagnetic mechanism, the electromagnetic mechanism comprises an operating arm, a rotating shaft, an armature and an electromagnetic coil, wherein one end of the operating arm and one end of the armature are connected to the rotating shaft, and the other end of the armature is connected with one end of the opening spring 4. When the switch is switched on, electromagnetic attraction is generated after the electromagnetic coil is electrified, so that the armature is attracted, the operating arm is driven to rotate anticlockwise around the rotating shaft, the insulating pull rod 2 moves upwards, the moving contact and the static contact in the vacuum arc extinguish chamber 1 are closed, the coil is kept electrified, the armature is kept at a switch-on position, and the switch-on operation is completed. On the contrary, after the electromagnetic coil loses power, the electromagnetic suction force is lost, the operating arm is driven to rotate clockwise around the rotating shaft under the action of the opening spring 4, the insulating pull rod 2 moves downwards, and the moving contact and the static contact in the vacuum arc extinguish chamber 1 are separated, so that opening is completed.
The controller 7 comprises a control circuit, wherein the control circuit comprises a plurality of fast energy storage elements 6 and a plurality of fast control switches corresponding to the fast energy storage elements 6, each fast energy storage element 6 and each fast control switch are connected in series with one driving coil of a plurality of driving coils, and the plurality of fast control switches control the plurality of fast energy storage elements 6 to discharge the plurality of driving coils simultaneously when the circuit fails so as to control the current flowing through the plurality of driving coils and the change rate of the current.
Compared with the prior art, the pulse contactor has the advantages that compared with an ordinary contactor, the switching-off is not required to be carried out by the controller 7 to send a switching-off instruction, the switching-off is automatically switched off by the switching-off spring 4, safety and reliability are realized, a quick mechanism is adopted, the problem that the switching-on time of the ordinary contactor is slow can be solved, compared high-voltage silicon controlled rectifier is large in through-flow capacity, simple in structure and control, high in safety and reliability and low in cost.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (9)
1. A pulsed contactor, characterized by: including vacuum interrupter (1), insulating pull rod (2), stroke spring (3), transmission pull rod (8), separating brake spring (4), actuating mechanism (5), energy storage component (6) and controller (7), vacuum interrupter (1) lower extreme links to each other with insulating pull rod (2), the one end that vacuum interrupter (1) was kept away from in insulating pull rod (2) is connected with stroke spring (3), the other end and the transmission pull rod (8) of stroke spring (3) are connected, transmission pull rod (8) are connected with separating brake spring (4), the other end and actuating mechanism (5) of separating brake spring (4) are connected, actuating mechanism (5) are connected with energy storage component (6) electricity, energy storage component (6) are connected with controller (7) electricity.
2. A pulsed contactor according to claim 1, characterized in that: the vacuum arc-extinguishing chamber (1) is positioned at the top end of the contactor shell.
3. A pulsed contactor according to claim 2, characterized in that: the vacuum arc extinguish chamber (1) comprises a switch component, the switch component comprises a moving contact and a fixed contact, the moving contact is connected with the insulating pull rod (2), and the switch component is used for executing the opening action or closing action of the circuit when the circuit works normally or breaks down.
4. A pulsed contactor according to claim 3, wherein: the insulating pull rod (2) comprises a core rod and an insulating sleeve, wherein blind holes are formed in two ends of the core rod respectively, the insulating sleeve is sleeved outside the core rod, and a plurality of layers of skirt edges are arranged on the outer surface of the insulating sleeve at equal intervals.
5. A pulsed contactor according to claim 1, characterized in that: the driving mechanism (5) is fixed at the bottom end of the contactor shell.
6. A pulsed contactor according to claim 5, characterized in that: the driving mechanism (5) comprises one or more combinations of a repulsion mechanism, an electromagnetic mechanism and a permanent magnetic mechanism.
7. A pulsed contactor according to claim 6, characterized in that: the maintaining mode of the opening and closing state of the driving mechanism (5) comprises at least one of the following modes: magnetic holding, elastic element holding, and mechanical latching holding.
8. A pulsed contactor according to claim 1, characterized in that: the energy storage element (6) comprises one or more combinations of a capacitor and a battery.
9. A pulsed contactor according to claim 1, characterized in that: the control circuit in the controller (7) comprises a plurality of rapid energy storage elements and a plurality of corresponding rapid control switches, wherein each rapid energy storage element and each rapid control switch are connected with one driving coil in a plurality of driving coils in series, and the plurality of rapid control switches control the plurality of rapid energy storage elements to discharge the plurality of driving coils simultaneously when the circuit breaks down so as to control the current flowing through the plurality of driving coils and the change rate of the current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110426688.XA CN113130251A (en) | 2021-04-20 | 2021-04-20 | Pulse type contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110426688.XA CN113130251A (en) | 2021-04-20 | 2021-04-20 | Pulse type contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113130251A true CN113130251A (en) | 2021-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110426688.XA Pending CN113130251A (en) | 2021-04-20 | 2021-04-20 | Pulse type contactor |
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| CN (1) | CN113130251A (en) |
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| CN102522254A (en) * | 2011-12-02 | 2012-06-27 | 安徽宇腾真空电气有限责任公司 | Permanent magnet type vacuum circuit breaker |
| CN103280372A (en) * | 2013-05-16 | 2013-09-04 | 上海合凯电气科技有限公司 | Fast eddy current drive mechanism |
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| CN105390330A (en) * | 2015-12-13 | 2016-03-09 | 安徽徽电科技股份有限公司 | High-speed vacuum circuit breaker based on eddy current drive |
| CN206250113U (en) * | 2016-12-14 | 2017-06-13 | 中国西电集团公司 | A kind of flexible DC power transmission fixed sealing type fast vacuum contactor |
| CN208873656U (en) * | 2018-09-26 | 2019-05-17 | 江苏大全高压开关有限公司 | A kind of 10kV single stage vacuum contactor |
| CN214378214U (en) * | 2021-04-20 | 2021-10-08 | 安徽一天电气技术股份有限公司 | Pulse type contactor |
-
2021
- 2021-04-20 CN CN202110426688.XA patent/CN113130251A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201298500Y (en) * | 2008-11-20 | 2009-08-26 | 无锡市蓝虹电子有限公司 | Plateau type high voltage AC vacuum contactor |
| CN101814393A (en) * | 2010-04-21 | 2010-08-25 | 朱平远 | Vacuum contactor with mixed magnetic field |
| CN102522254A (en) * | 2011-12-02 | 2012-06-27 | 安徽宇腾真空电气有限责任公司 | Permanent magnet type vacuum circuit breaker |
| CN103280372A (en) * | 2013-05-16 | 2013-09-04 | 上海合凯电气科技有限公司 | Fast eddy current drive mechanism |
| CN204696029U (en) * | 2015-05-19 | 2015-10-07 | 广东电网有限责任公司中山供电局 | Monostable permanent magnetic mechanism controller and there is its vacuum circuit-breaker |
| CN105390330A (en) * | 2015-12-13 | 2016-03-09 | 安徽徽电科技股份有限公司 | High-speed vacuum circuit breaker based on eddy current drive |
| CN206250113U (en) * | 2016-12-14 | 2017-06-13 | 中国西电集团公司 | A kind of flexible DC power transmission fixed sealing type fast vacuum contactor |
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Application publication date: 20210716 |