CN110896005B - Vacuum circuit breaker signal feedback mechanism - Google Patents
Vacuum circuit breaker signal feedback mechanism Download PDFInfo
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- CN110896005B CN110896005B CN201911201238.XA CN201911201238A CN110896005B CN 110896005 B CN110896005 B CN 110896005B CN 201911201238 A CN201911201238 A CN 201911201238A CN 110896005 B CN110896005 B CN 110896005B
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- circuit breaker
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
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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
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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
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention provides a signal feedback mechanism of a vacuum circuit breaker, which comprises a circuit breaker shell, wherein a left arc extinguish chamber and a right arc extinguish chamber are symmetrically arranged in the circuit breaker shell from left to right, moving contacts of the left arc extinguish chamber and the right arc extinguish chamber are respectively connected with a connecting rod mechanism, the connecting rod mechanism comprises a telescopic rod, a sleeve rod and a connecting lever, and further comprises a first micro switch, a second micro switch, a first lug and a second lug, the first lug and the second lug are respectively arranged on the upper side and the lower side of one connecting lever, when the moving contacts are in place for switching, the first lug is in contact with the first micro switch and feeds back a switching-on in-place signal, and when the moving contacts are in place for switching, the second lug is in contact with the second micro switch and feeds back a switching-off-in-place signal. According to the invention, through the first lug, the second lug, the first microswitch and the second microswitch, the signal feedback mechanism of the vacuum circuit breaker can monitor the opening and closing signals of the circuit breaker, and has a simple integral structure and is convenient to install and realize.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a signal feedback mechanism of a vacuum circuit breaker.
Background
The vacuum circuit breaker is named because the arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum, and has the advantages of small volume, no need of maintenance for arc extinguishing and the like. Because the circuit breaker is not in place and an electric arc may be formed, and then a contact of a circuit device is burnt, the in-place signal of the circuit breaker is required to be detected, and the existing circuit breaker opening and closing signal feedback device is complex in structure and difficult to realize.
A large number of typical prior arts are found through retrieval, for example, a patent with the application number of 201711285332.9 discloses a vacuum circuit breaker signal feedback mechanism which converts the mechanical motion state of a circuit breaker into an electric signal and transmits the electric signal to a train control system. For another example, patent application No. 201510840956.7 discloses a feedback device for opening and closing signals, which can avoid the problems of arcing and contact burning caused by improper opening and closing and failure of feedback. Also, for example, patent application No. 201120356535.4 discloses a circuit breaker operation circuit device, which has a feature of transmitting an opening/closing state signal of a switch to a controller through an opening/closing signal, and can monitor a state of the circuit breaker well.
Therefore, for the circuit breaker opening and closing signal feedback mechanism, many practical problems (such as simplified structure and the like) to be dealt with in practical application still have unreported specific solutions.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a signal feedback mechanism of a vacuum circuit breaker, which has the following specific technical scheme:
a signal feedback mechanism of a vacuum circuit breaker comprises a circuit breaker shell, wherein a left arc extinguish chamber and a right arc extinguish chamber are symmetrically arranged in the circuit breaker shell in a left-right mode, a certain distance is reserved between the left arc extinguish chamber and the right arc extinguish chamber, a fixed contact and a movable contact are arranged in the left arc extinguish chamber and the right arc extinguish chamber respectively, the respective movable contacts of the left arc extinguish chamber and the right arc extinguish chamber are connected with a connecting rod mechanism, the connecting rod mechanism comprises a telescopic rod, a sleeve rod and a connecting lever, the telescopic rod is horizontally arranged, one end of the sleeve rod is a cavity body, one end of the telescopic rod is fixedly connected with leading-out ends of automatic conducting rods of the left arc extinguish chamber and the right arc extinguish chamber respectively, the other end of the telescopic rod extends into the cavity body and is elastically connected with the sleeve rod, one end of the connecting lever is pivoted with the other end of the sleeve rod, an insulating pull rod is pivoted with the other end of the connecting lever, and the connecting lever rotates along with the up-down movement of the insulating pull rod, the insulating pull rod moves up and down to drive the connecting rod mechanism to move synchronously, so that respective moving contacts in the left arc extinguish chamber and the right arc extinguish chamber are driven to realize opening and closing movements with corresponding fixed contacts;
the vacuum circuit breaker signal feedback mechanism further comprises a first microswitch, a second microswitch, a first lug and a second lug, wherein the first microswitch and the second microswitch are arranged in the circuit breaker shell, the first lug and the second lug are respectively arranged on the upper side and the lower side of one connecting lever, when the moving contact is switched on in place, the first lug is in contact with the first microswitch and feeds back a signal that the switching-on is in place, and when the moving contact is switched off in place, the second lug is in contact with the second microswitch and feeds back a signal that the switching-off is in place.
Optionally, in the moving contact switching-on process, the first micro-switch roller is gradually compressed by the first bump, when the moving contact is switched on in place, the first micro-switch feeds back a switching-on in place signal, in the moving contact switching-off process, the second micro-switch roller is gradually compressed by the second bump, and when the moving contact is switched off in place, the second micro-switch feeds back a switching-off in place signal.
Optionally, the vacuum circuit breaker signal feedback mechanism further includes a third micro switch, a fourth micro switch, a third bump and a fourth bump, the third micro switch and the fourth micro switch are disposed in the circuit breaker housing, the third bump and the fourth bump are disposed on the upper side and the lower side of another crank arm respectively, when the moving contact is switched on in place, the third bump contacts with the third micro switch and feeds back a signal indicating that the switching-on is in place, and when the moving contact is switched off in place, the fourth bump contacts with the fourth micro switch and feeds back a signal indicating that the switching-off is in place.
Optionally, in the moving contact switching-on process, the third micro-switch roller is gradually compressed by the third bump, when the moving contact switching-on is in place, the third micro-switch feeds back a switching-on in-place signal, in the moving contact switching-off process, the fourth micro-switch roller is gradually compressed by the fourth bump, and when the moving contact switching-off is in place, the fourth micro-switch feeds back a switching-off in-place signal.
Optionally, the first micro switch and the third micro switch both have a first terminal for connecting a cable for transmitting a moving contact switch-on in-place signal, and the second micro switch and the fourth micro switch both have a second terminal for connecting a cable for transmitting a moving contact switch-off in-place signal.
Optionally, the signal feedback mechanism of the vacuum circuit breaker further includes a controller, and the controller is electrically connected to the first micro switch, the second micro switch, the third micro switch, and the fourth micro switch, respectively, and is configured to receive signals indicating that the moving contact is switched on and off in place.
Optionally, a plurality of chutes are uniformly and circularly arranged on the inner wall of the cavity body, a sliding block is sleeved on the telescopic rod, the sliding block is located in the cavity body and is in sliding connection with the chutes, a stop block is arranged in the inner wall of the cavity body, a certain distance is reserved between the stop block and the sliding block, a spiral spring is connected between the stop block and the sliding block, the spiral spring is sleeved on the telescopic rod, and the telescopic rod is elastically connected with the loop bar through the spiral spring.
The beneficial effects obtained by the invention comprise:
1. through the first lug, the second lug, the first microswitch and the second microswitch, the signal feedback mechanism of the vacuum circuit breaker can monitor the opening and closing signals of the circuit breaker, has simple integral structure and is convenient to install and realize;
2. by arranging the third bump, the fourth bump, the third microswitch and the fourth microswitch, the reliability of the signal feedback mechanism of the vacuum circuit breaker on the monitoring of the opening and closing signals can be further improved, and the problems of electric arcs and contact burning caused by the fact that the opening and closing of the vacuum circuit breaker cannot be in place and cannot be fed back can be better avoided.
Drawings
The present invention will be further understood from the following description taken in conjunction with the accompanying drawings, the emphasis instead being placed upon illustrating the principles of the embodiments.
FIG. 1 is a schematic structural view of a linkage mechanism in an open position according to an embodiment of the present invention;
FIG. 2 is a schematic view of the linkage mechanism in a closed position according to one embodiment of the present invention;
fig. 3 is a schematic diagram of the overall structure of a signal feedback mechanism of a vacuum circuit breaker according to an embodiment of the present invention;
FIG. 4 is a schematic view of a loop bar configuration in accordance with one embodiment of the present invention;
FIG. 5 is a first schematic view illustrating a structural relationship between the retractable rod and the loop rod according to one embodiment of the present invention;
fig. 6 is a schematic structural relationship diagram of the telescopic rod and the loop rod in the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms can be understood by those skilled in the art according to specific situations.
The invention discloses a signal feedback mechanism of a vacuum circuit breaker, which explains the following embodiments according to the attached drawings:
the first embodiment is as follows:
as shown in fig. 1, 2 and 3, a signal feedback mechanism for a vacuum circuit breaker includes a circuit breaker housing 1, a left arc-extinguishing chamber 12 and a right arc-extinguishing chamber 13 are symmetrically disposed in the circuit breaker housing 1, the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 are spaced apart by a certain distance, a fixed contact and a movable contact are disposed in each of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13, each movable contact of each of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 is connected to a link mechanism, the link mechanism includes a telescopic rod 21, a sleeve rod 22 and a connecting lever 23, the telescopic rod 21 is horizontally disposed, one end of the sleeve rod 22 is a hollow cavity, one end of the telescopic rod 21 is fixedly connected to a leading-out end of each movable conductive rod of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13, the other end of the telescopic rod 21 extends into the hollow cavity and is elastically connected to the sleeve rod 22, one end of the connecting lever 23 is pivotally connected to the other end of the sleeve rod 22, the other end of the connecting lever 23 is pivotally connected with an insulating pull rod 25, the connecting lever 23 rotates along with the up-and-down movement of the insulating pull rod 25, wherein the insulating pull rod 25 moves up and down to drive the link mechanism to move synchronously, and further drive the moving contacts in the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 to realize the opening and closing movement with the corresponding fixed contacts.
When the circuit breaker is in the position of closing the floodgate, connecting lever 23 and loop bar 22 are in same straight line, and the stress between left explosion chamber 12 and the right explosion chamber 13 is balanced in the horizontal direction, has reduced insulating pull rod 25 by a wide margin and has closed a floodgate retentivity that the circuit breaker need provide when closing, that is to say has reduced the separating brake resistance to effectively increase the separating brake speed of circuit breaker, improve the performance of circuit breaker.
In this embodiment, the insulating pull rod 25 moves up and down to drive the link mechanism to move synchronously, and further drive the respective moving contacts in the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 to move in an opening and closing manner with the corresponding fixed contacts, so that the synchronous opening and closing actions of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 are realized, the opening and closing operations of double breaks in the circuit breaker are realized, the synchronism is consistent, the opening capability and the protection level of the circuit breaker on the circuit are greatly improved, and the circuit breaker can be effectively applied to the high-voltage and ultrahigh-voltage electrical fields.
As shown in fig. 1 and 2, the signal feedback mechanism of the vacuum circuit breaker further includes a first micro switch 16, a second micro switch 17, a first bump 14 and a second bump 15, the first micro switch 16 and the second micro switch 17 are disposed in the breaker housing 1, the first bump 14 and the second bump 15 are respectively disposed on the upper side and the lower side of one of the crank arms 23, when the moving contact is switched on in place, the first bump 14 contacts the first micro switch 16 and feeds back a switching-on in place signal, and when the moving contact is switched off in place, the second bump 15 contacts the second micro switch 17 and feeds back a switching-off in place signal. The first bump 14 corresponds to the first microswitch 16, the second bump 15 corresponds to the second microswitch 17, in the moving contact switching-on process, the roller of the first microswitch 16 is gradually compressed by the first bump 14, when the moving contact is switched on in place, the first microswitch 16 feeds back a switching-on in-place signal, in the moving contact switching-off process, the roller of the second microswitch 17 is gradually compressed by the second bump 15, and when the moving contact is switched off in place, the second microswitch 17 feeds back a switching-off in-place signal.
Through first lug 14, second lug 15, first micro-gap switch 16 and second micro-gap switch 17, a vacuum circuit breaker signal feedback mechanism can monitor the divide-shut brake signal of circuit breaker, its overall structure is simple, the installation of being convenient for is realized.
As a preferred scheme, the feedback mechanism of the vacuum circuit breaker further comprises a driving mechanism 3, wherein the driving mechanism 3 is connected with the insulating pull rod 25 and is used for driving the insulating pull rod 25 to move up and down and driving the link mechanism to move synchronously, so as to drive respective moving contacts in the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 to synchronously realize the switching-on and switching-off motion of corresponding static contacts. The driving mechanism 3 may be a hydraulic driving mechanism 3 or a permanent magnet driving mechanism 3, and preferably, the driving mechanism 3 according to the embodiment is selected as the hydraulic driving mechanism 3.
The vacuum circuit breaker signal feedback mechanism further comprises a third microswitch 110, a fourth microswitch 111, a third lug 18 and a fourth lug 19, wherein the third microswitch 110 and the fourth microswitch 111 are arranged in the circuit breaker shell 1, the third lug 18 and the fourth lug 19 are respectively arranged on the upper side and the lower side of the other crank arm 23, when the moving contact is switched in place, the third lug 18 is in contact with the third microswitch 110 and feeds back a switching-in-place signal, and when the moving contact is switched in place, the fourth lug 19 is in contact with the fourth microswitch 111 and feeds back a switching-off-place signal. In the moving contact switching-on process, the roller of the third microswitch 110 is gradually compressed by the third bump 18, when the moving contact is switched on in place, the third microswitch 110 feeds back a switching-on in-place signal, in the moving contact switching-off process, the roller of the fourth microswitch 111 is gradually compressed by the fourth bump 19, and when the moving contact is switched off in place, the fourth microswitch 111 feeds back a switching-off in-place signal. By arranging the third bump 18, the fourth bump 19, the third microswitch 110 and the fourth microswitch 111, the reliability of the signal feedback mechanism of the vacuum circuit breaker to the on-off signal monitoring can be further improved, and the problems of electric arcs and contact burning caused by the fact that the vacuum circuit breaker cannot be switched on and off and cannot be fed back are better avoided.
Optionally, the first micro switch 16 and the third micro switch 110 both have a first terminal for connecting a cable for transmitting a moving contact closing in-place signal, the second micro switch 17 and the fourth micro switch 111 both have a second terminal for connecting a cable for transmitting a moving contact opening in-place signal, and the vacuum circuit breaker signal feedback mechanism further includes a controller, wherein the controller is electrically connected with the first micro switch 16, the second micro switch 17, the third micro switch 110 and the fourth micro switch 111 respectively, and is configured to receive a moving contact closing and opening in-place signal. The controller can be a microprocessor, processes the received switching-on and switching-off feedback signals, and then transmits data to an operating system or a central control system corresponding to the vacuum circuit breaker, so that technicians can monitor, manage and maintain the working condition of the vacuum circuit breaker.
Example two:
as shown in fig. 1, 2 and 3, a signal feedback mechanism for a vacuum circuit breaker includes a circuit breaker housing 1, a left arc-extinguishing chamber 12 and a right arc-extinguishing chamber 13 are symmetrically disposed in the circuit breaker housing 1, the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 are spaced apart by a certain distance, a fixed contact and a movable contact are disposed in each of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13, each movable contact of each of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 is connected to a link mechanism, the link mechanism includes a telescopic rod 21, a sleeve rod 22 and a connecting lever 23, the telescopic rod 21 is horizontally disposed, one end of the sleeve rod 22 is a hollow cavity, one end of the telescopic rod 21 is fixedly connected to a leading-out end of each movable conductive rod of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13, the other end of the telescopic rod 21 extends into the hollow cavity and is elastically connected to the sleeve rod 22, one end of the connecting lever 23 is pivotally connected to the other end of the sleeve rod 22, the other end of the connecting lever 23 is pivotally connected with an insulating pull rod 25, the connecting lever 23 rotates along with the up-and-down movement of the insulating pull rod 25, wherein the insulating pull rod 25 moves up and down to drive the link mechanism to move synchronously, and further drive the respective moving contacts in the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 to realize the opening and closing movement between the moving contacts and the corresponding fixed contacts.
When the circuit breaker is at the closing position, the connecting lever 23 and the loop bar 22 are on the same straight line, and the stress between the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 is balanced in the horizontal direction, so that the closing holding force required to be provided by the insulating pull rod 25 when the circuit breaker is closed is greatly reduced, namely, the opening resistance is reduced, the opening speed of the circuit breaker is effectively increased, and the performance of the circuit breaker is improved.
In this embodiment, the insulating pull rod 25 moves up and down to drive the link mechanism to move synchronously, and further drive the respective moving contacts in the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 to move in an opening and closing manner with the corresponding fixed contacts, so that the synchronous opening and closing actions of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 are realized, the opening and closing operations of double breaks in the circuit breaker are realized, the synchronism is consistent, the opening capability and the protection level of the circuit breaker on the circuit are greatly improved, and the circuit breaker can be effectively applied to the high-voltage and ultrahigh-voltage electrical fields.
The vacuum circuit breaker signal feedback mechanism further comprises a first micro switch 16, a second micro switch 17, a first bump 14 and a second bump 15, wherein the first micro switch 16 and the second micro switch 17 are arranged in the circuit breaker shell 1, the first bump 14 and the second bump 15 are respectively arranged on the upper side and the lower side of one crank arm 23, when the moving contact is switched on in place, the first bump 14 is in contact with the first micro switch 16 and feeds back a switching-on in place signal, and when the moving contact is switched off in place, the second bump 15 is in contact with the second micro switch 17 and feeds back a switching-off in place signal. The first bump 14 corresponds to the first microswitch 16, the second bump 15 corresponds to the second microswitch 17, in the moving contact switching-on process, the roller of the first microswitch 16 is gradually compressed by the first bump 14, when the moving contact is switched on in place, the first microswitch 16 feeds back a switching-on in-place signal, in the moving contact switching-off process, the roller of the second microswitch 17 is gradually compressed by the second bump 15, and when the moving contact is switched off in place, the second microswitch 17 feeds back a switching-off in-place signal.
Through first lug 14, second lug 15, first micro-gap switch 16 and second micro-gap switch 17, a vacuum circuit breaker signal feedback mechanism can monitor the divide-shut brake signal of circuit breaker, its overall structure is simple, the installation of being convenient for is realized.
As a preferred scheme, the feedback mechanism of the vacuum circuit breaker further comprises a driving mechanism 3, wherein the driving mechanism 3 is connected with the insulating pull rod 25 and is used for driving the insulating pull rod 25 to move up and down and driving the link mechanism to move synchronously, so as to drive respective moving contacts in the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 to synchronously realize the switching-on and switching-off motion of corresponding static contacts. The driving mechanism 3 may be a hydraulic driving mechanism 3 or a permanent magnet driving mechanism 3, and preferably, the driving mechanism 3 in this embodiment is selected to be the hydraulic driving mechanism 3.
The vacuum circuit breaker signal feedback mechanism further comprises a third microswitch 110, a fourth microswitch 111, a third lug 18 and a fourth lug 19, wherein the third microswitch 110 and the fourth microswitch 111 are arranged in the circuit breaker shell 1, the third lug 18 and the fourth lug 19 are respectively arranged on the upper side and the lower side of the other crank arm 23, when the moving contact is switched in place, the third lug 18 is in contact with the third microswitch 110 and feeds back a switching-in-place signal, and when the moving contact is switched in place, the fourth lug 19 is in contact with the fourth microswitch 111 and feeds back a switching-off-place signal. In the moving contact switching-on process, the roller of the third microswitch 110 is gradually compressed by the third bump 18, when the moving contact is switched on in place, the third microswitch 110 feeds back a switching-on in-place signal, in the moving contact switching-off process, the roller of the fourth microswitch 111 is gradually compressed by the fourth bump 19, and when the moving contact is switched off in place, the fourth microswitch 111 feeds back a switching-off in-place signal. By arranging the third bump 18, the fourth bump 19, the third microswitch 110 and the fourth microswitch 111, the reliability of the signal feedback mechanism of the vacuum circuit breaker to the on-off signal monitoring can be further improved, and the problems of electric arcs and contact burning caused by the fact that the vacuum circuit breaker cannot be switched on and off and cannot be fed back are better avoided.
Optionally, the first micro switch 16 and the third micro switch 110 both have a first terminal for connecting a cable for transmitting a moving contact closing in-place signal, the second micro switch 17 and the fourth micro switch 111 both have a second terminal for connecting a cable for transmitting a moving contact opening in-place signal, and the vacuum circuit breaker signal feedback mechanism further includes a controller, wherein the controller is electrically connected with the first micro switch 16, the second micro switch 17, the third micro switch 110 and the fourth micro switch 111 respectively, and is configured to receive a moving contact closing and opening in-place signal. The controller can be a microprocessor, processes the received switching-on and switching-off feedback signals, and then transmits data to an operating system or a central control system corresponding to the vacuum circuit breaker, so that technicians can monitor, manage and maintain the working condition of the vacuum circuit breaker.
As shown in fig. 4 and 5, a plurality of sliding grooves 29 are uniformly and annularly arranged on the inner wall of the cavity body, a sliding block 27 is sleeved on the telescopic rod 21, the sliding block 27 is positioned in the cavity body and is in sliding connection with the sliding grooves 29, a stop block 28 is arranged in the inner wall of the cavity body, the stop block 28 and the sliding block 27 are separated by a certain distance, a coil spring 24 is connected between the stop block 28 and the sliding block 27, the coil spring 24 is sleeved on the telescopic rod 21, and the telescopic rod 21 is elastically connected with the loop bar 22 through the coil spring 24.
The slide block 27 is sleeved on the telescopic rod 21, the slide block 27 is in sliding connection with a cavity body with a sliding groove 29, the spiral spring 24 is connected between the stop block 28 and the slide block 27, and the other end of the telescopic rod 21 extends into the cavity body to form an elastic connection relation with the loop bar 22, namely the telescopic rod 21 can extend and retract left and right within the loop bar 22, so that the overtravel of a moving contact of a breaker can be effectively absorbed, and the mechanical failure and the abrasion degree of the contact are reduced. The sliding block 27 is connected in the sliding groove 29 on the inner wall of the cavity body in a sliding mode, so that the stability of the telescopic rod 21 in stretching left and right in the sleeve rod 22 is further guaranteed, and the opening and closing reliability of the circuit breaker is improved.
When the circuit breaker at the breaking position is switched on, as shown in fig. 2, the driving mechanism 3 drives the insulating pull rod 25 to move upwards, the connecting lever 23 moves upwards around the rotating shaft 26, and pushes the sleeve rod 22 to move horizontally to both sides, the telescopic rod 21 is driven to synchronously push each movable contact to move towards the direction close to the corresponding fixed contact until each movable contact is contacted with the corresponding fixed contact, the spiral spring 24 starts to compress, the overtravel of the movable contact is absorbed, the bounce time of the movable contact and the abrasion degree between the contacts are reduced, and the circuit breaker is switched on in place, so that the synchronous switching on of the left arc-extinguishing chamber and the right arc-extinguishing chamber is realized, the connecting lever 23 and the sleeve rod 22 are positioned on the same straight line, the horizontal direction stress between the left arc-extinguishing chamber and the right arc-extinguishing chamber is balanced, the switching-on holding force required by the driving mechanism 3 when the circuit breaker is switched on is greatly reduced, that is the switching-off resistance is reduced, and the switching-off speed of the circuit breaker is effectively increased, the performance parameters of the circuit breaker are improved. When the breaker is opened, the motion process of each component is opposite to the closing process, the potential energy stored by the spiral spring 24 is rapidly released, the opening speed of the breaker is further improved, the moving contact and the static contact in the left and right arc extinguish chambers are synchronously opened, the electric arc is rapidly extinguished, each moving contact synchronously reaches the opening position, the opening time of the breaker is shortened, the high-voltage double-break breaker adopts a structure of each phase of double arc extinguish chambers, the voltage opening and breaking capacity of the breaker is greatly improved, meanwhile, a specially designed driving mechanism 3 and a link mechanism are matched and arranged, so that the moving synchronism of a moving contact between phases of the circuit breaker and between double breaks of each phase is effectively improved, the switching-on and switching-off time of the circuit breaker is reduced, the performance parameters of the circuit breaker are greatly improved, the high-voltage double-break circuit breaker has great application value in the high-voltage and ultrahigh-voltage electrical fields.
As shown in fig. 4 and 5, in this embodiment, a plurality of vent groups 210 are annularly disposed on the inner wall of the cavity, the vent groups 210 are located between the stopper 28 and the bottom of the inner wall of the cavity, the diameter of the vent in each vent group 210 is equal, the diameters of the vent groups 210 are gradually increased from the opening end of the cavity to the bottom end of the inner wall, a sealing block 211 is disposed at the other end of the telescopic rod 21, and the sealing block 211 is attached to the inner wall of the cavity. When the circuit breaker is closed, sealed piece 211 is located the inner wall bottom of the cavity body, and when the circuit breaker opens, sealed piece 211 is located the laminating on dog 28 surface. When the circuit breaker is opened, sealed piece 211 is removed from the inner wall bottom of the cavity body toward dog 28 direction, gas in the cavity body is extruded by sealed piece 211 by the air vent, because the diameter of a plurality of air vent groups 210 is increased toward cavity body inner wall bottom subassembly by cavity body open end, the diameter of the air vent of a set of air vent group 210 farthest from cavity body open end is far greater than the thickness of sealed piece 211, air vent group 210 has played the effect of a buffering, can make the more steady of circuit breaker opening. When the circuit breaker is closed, because the sealing block 211 moves to the bottom of the inner wall of the cavity body from the stop block 28, and the diameter of the plurality of vent hole groups 210 is increased from the opening end of the cavity body to the bottom assembly of the inner wall of the cavity body, the closing speed of the circuit breaker cannot be influenced.
In this embodiment, the thickness of the sealing block 211 is less than the separation distance between two adjacent sets of vent holes 210. The diameter of the vent holes of the set of vent hole groups 210 farthest from the open end of the cavity body is more than half of the distance from the stop 28 to the bottom end of the inner wall of the cavity body. When the circuit breaker closes a floodgate, because sealed piece 211 is by the motion of dog 28 toward the inner wall bottom of the cavity body, and the diameter of a plurality of vent group 210 is increased toward cavity body inner wall bottom subassembly by cavity body open end, the diameter of the vent of a set of vent group 210 farthest from cavity body open end is more than half of dog 28 to cavity body inner wall bottom distance, its closing speed can not receive the resistance influence that vent group 210 was extruded to the air current, at the colleague of feedback circuit breaker divide-shut brake signal, the closing stability and the reliability of circuit breaker have also been improved.
Example three:
as shown in fig. 1, 2 and 3, a signal feedback mechanism for a vacuum circuit breaker includes a circuit breaker housing 1, a left arc-extinguishing chamber 12 and a right arc-extinguishing chamber 13 are symmetrically disposed in the circuit breaker housing 1, the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 are spaced apart by a certain distance, a fixed contact and a movable contact are disposed in each of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13, each movable contact of each of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 is connected to a link mechanism, the link mechanism includes a telescopic rod 21, a sleeve rod 22 and a connecting lever 23, the telescopic rod 21 is horizontally disposed, one end of the sleeve rod 22 is a hollow cavity, one end of the telescopic rod 21 is fixedly connected to a leading-out end of each movable conductive rod of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13, the other end of the telescopic rod 21 extends into the hollow cavity and is elastically connected to the sleeve rod 22, one end of the connecting lever 23 is pivotally connected to the other end of the sleeve rod 22, the other end of the connecting lever 23 is pivotally connected with an insulating pull rod 25, the connecting lever 23 rotates along with the up-and-down movement of the insulating pull rod 25, wherein the insulating pull rod 25 moves up and down to drive the link mechanism to move synchronously, and further drive the respective moving contacts in the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 to realize the opening and closing movement between the moving contacts and the corresponding fixed contacts.
When the circuit breaker is in the position of closing the floodgate, connecting lever 23 and loop bar 22 are in same straight line, and the stress between left explosion chamber 12 and the right explosion chamber 13 is balanced in the horizontal direction, has reduced insulating pull rod 25 by a wide margin and has closed a floodgate retentivity that the circuit breaker need provide when closing, that is to say has reduced the separating brake resistance to effectively increase the separating brake speed of circuit breaker, improve the performance of circuit breaker.
In this embodiment, the insulating pull rod 25 moves up and down to drive the link mechanism to move synchronously, and further drive the respective moving contacts in the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 to move in an opening and closing manner with the corresponding fixed contacts, so that the synchronous opening and closing actions of the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 are realized, the opening and closing operations of double breaks in the circuit breaker are realized, the synchronism is consistent, the opening capability and the protection level of the circuit breaker on the circuit are greatly improved, and the circuit breaker can be effectively applied to the high-voltage and ultrahigh-voltage electrical fields.
The vacuum circuit breaker signal feedback mechanism further comprises a first micro switch 16, a second micro switch 17, a first bump 14 and a second bump 15, wherein the first micro switch 16 and the second micro switch 17 are arranged in the circuit breaker shell 1, the first bump 14 and the second bump 15 are respectively arranged on the upper side and the lower side of one crank arm 23, when the moving contact is switched on in place, the first bump 14 is in contact with the first micro switch 16 and feeds back a switching-on in place signal, and when the moving contact is switched off in place, the second bump 15 is in contact with the second micro switch 17 and feeds back a switching-off in place signal. The first bump 14 corresponds to the first microswitch 16, the second bump 15 corresponds to the second microswitch 17, in the moving contact switching-on process, the roller of the first microswitch 16 is gradually compressed by the first bump 14, when the moving contact is switched on in place, the first microswitch 16 feeds back a switching-on in-place signal, in the moving contact switching-off process, the roller of the second microswitch 17 is gradually compressed by the second bump 15, and when the moving contact is switched off in place, the second microswitch 17 feeds back a switching-off in-place signal.
Through first lug 14, second lug 15, first micro-gap switch 16 and second micro-gap switch 17, the vacuum circuit breaker signal feedback mechanism of this embodiment can monitor the divide-shut brake signal of circuit breaker, its overall structure is simple, the installation of being convenient for is realized.
As a preferred scheme, the feedback mechanism of the vacuum circuit breaker further comprises a driving mechanism 3, wherein the driving mechanism 3 is connected with the insulating pull rod 25 and is used for driving the insulating pull rod 25 to move up and down and driving the link mechanism to move synchronously, so as to drive respective moving contacts in the left arc-extinguishing chamber 12 and the right arc-extinguishing chamber 13 to synchronously realize the switching-on and switching-off motion of corresponding static contacts. The driving mechanism 3 may be a hydraulic driving mechanism 3 or a permanent magnet driving mechanism 3, and preferably, the driving mechanism 3 in this embodiment is selected to be the hydraulic driving mechanism 3.
The vacuum circuit breaker signal feedback mechanism further comprises a third microswitch 110, a fourth microswitch 111, a third lug 18 and a fourth lug 19, wherein the third microswitch 110 and the fourth microswitch 111 are arranged in the circuit breaker shell 1, the third lug 18 and the fourth lug 19 are respectively arranged on the upper side and the lower side of the other crank arm 23, when the moving contact is switched in place, the third lug 18 is in contact with the third microswitch 110 and feeds back a switching-in-place signal, and when the moving contact is switched in place, the fourth lug 19 is in contact with the fourth microswitch 111 and feeds back a switching-off-place signal. In the moving contact switching-on process, the roller of the third microswitch 110 is gradually compressed by the third bump 18, when the moving contact is switched on in place, the third microswitch 110 feeds back a switching-on in-place signal, in the moving contact switching-off process, the roller of the fourth microswitch 111 is gradually compressed by the fourth bump 19, and when the moving contact is switched off in place, the fourth microswitch 111 feeds back a switching-off in-place signal. By arranging the third bump 18, the fourth bump 19, the third microswitch 110 and the fourth microswitch 111, the reliability of the signal feedback mechanism of the vacuum circuit breaker to the on-off signal monitoring can be further improved, and the problems of electric arcs and contact burning caused by the fact that the vacuum circuit breaker cannot be switched on and off and cannot be fed back are better avoided.
Optionally, the first micro switch 16 and the third micro switch 110 both have a first terminal for connecting a cable for transmitting a moving contact closing in-place signal, the second micro switch 17 and the fourth micro switch 111 both have a second terminal for connecting a cable for transmitting a moving contact opening in-place signal, and the vacuum circuit breaker signal feedback mechanism further includes a controller, wherein the controller is electrically connected with the first micro switch 16, the second micro switch 17, the third micro switch 110 and the fourth micro switch 111 respectively, and is configured to receive a moving contact closing and opening in-place signal. The controller can be a microprocessor, processes the received opening and closing feedback signals, and then transmits data to an operating system or a central control system corresponding to the vacuum circuit breaker, so that technicians can monitor, manage and maintain the working condition of the vacuum circuit breaker.
As shown in fig. 4 and 5, a plurality of sliding grooves 29 are uniformly and annularly arranged on the inner wall of the cavity body, a sliding block 27 is sleeved on the telescopic rod 21, the sliding block 27 is positioned in the cavity body and is in sliding connection with the sliding grooves 29, a stop block 28 is arranged in the inner wall of the cavity body, the stop block 28 and the sliding block 27 are separated by a certain distance, a coil spring 24 is connected between the stop block 28 and the sliding block 27, the coil spring 24 is sleeved on the telescopic rod 21, and the telescopic rod 21 is elastically connected with the loop bar 22 through the coil spring 24.
The slide block 27 is sleeved on the telescopic rod 21, the slide block 27 is in sliding connection with a cavity body with a sliding groove 29, the spiral spring 24 is connected between the stop block 28 and the slide block 27, and the other end of the telescopic rod 21 extends into the cavity body to form an elastic connection relation with the loop bar 22, namely the telescopic rod 21 can extend and retract left and right within the loop bar 22, so that the overtravel of a moving contact of a breaker can be effectively absorbed, and the mechanical failure and the abrasion degree of the contact are reduced. The sliding block 27 is connected in the sliding groove 29 on the inner wall of the cavity body in a sliding mode, so that the stability of the telescopic rod 21 in stretching left and right in the sleeve rod 22 is further guaranteed, and the opening and closing reliability of the circuit breaker is improved.
When the circuit breaker at the breaking position is switched on, as shown in fig. 2, the driving mechanism 3 drives the insulating pull rod 25 to move upwards, the connecting lever 23 moves upwards around the rotating shaft 26, and pushes the sleeve rod 22 to move horizontally to both sides, the telescopic rod 21 is driven to synchronously push each movable contact to move towards the direction close to the corresponding fixed contact until each movable contact is contacted with the corresponding fixed contact, the spiral spring 24 starts to compress, the overtravel of the movable contact is absorbed, the bounce time of the movable contact and the abrasion degree between the contacts are reduced, and the circuit breaker is switched on in place, so that the synchronous switching on of the left arc-extinguishing chamber and the right arc-extinguishing chamber is realized, the connecting lever 23 and the sleeve rod 22 are positioned on the same straight line, the horizontal direction stress between the left arc-extinguishing chamber and the right arc-extinguishing chamber is balanced, the switching-on holding force required by the driving mechanism 3 when the circuit breaker is switched on is greatly reduced, that is the switching-off resistance is reduced, and the switching-off speed of the circuit breaker is effectively increased, the performance parameters of the circuit breaker are improved. When the breaker is opened, the motion process of each component is opposite to the closing process, the potential energy stored by the spiral spring 24 is rapidly released, the opening speed of the breaker is further improved, the moving contact and the static contact in the left and right arc extinguish chambers are synchronously opened, the electric arc is rapidly extinguished, each moving contact synchronously reaches the opening position, the opening time of the breaker is shortened, the high-voltage double-break breaker adopts a structure of each phase of double arc extinguish chambers, the voltage opening and breaking capacity of the breaker is greatly improved, meanwhile, a specially designed driving mechanism 3 and a link mechanism are matched and arranged, so that the moving synchronism of a moving contact between phases of the circuit breaker and between double breaks of each phase is effectively improved, the switching-on and switching-off time of the circuit breaker is reduced, the performance parameters of the circuit breaker are greatly improved, the high-voltage double-break circuit breaker has great application value in the high-voltage and ultrahigh-voltage electrical fields.
As shown in fig. 4 and 5, in this embodiment, a plurality of vent groups 210 are annularly disposed on the inner wall of the cavity, the vent groups 210 are located between the stopper 28 and the bottom of the inner wall of the cavity, the diameter of the vent in each vent group 210 is equal, the diameters of the vent groups 210 are gradually increased from the opening end of the cavity to the bottom end of the inner wall, a sealing block 211 is disposed at the other end of the telescopic rod 21, and the sealing block 211 is attached to the inner wall of the cavity. When the circuit breaker is closed, sealed piece 211 is located the inner wall bottom of the cavity body, and when the circuit breaker is opened, sealed piece 211 is located the laminating on dog 28 surface. When the circuit breaker is opened, sealed piece 211 is removed from the inner wall bottom of the cavity body toward dog 28 direction, gas in the cavity body is extruded by sealed piece 211 by the air vent, because the diameter of a plurality of air vent groups 210 is increased toward cavity body inner wall bottom subassembly by cavity body open end, the diameter of the air vent of a set of air vent group 210 farthest from cavity body open end is far greater than the thickness of sealed piece 211, air vent group 210 has played the effect of a buffering, can make the more steady of circuit breaker opening. When the circuit breaker is switched on, the sealing block 211 moves from the stopper 28 to the bottom of the inner wall of the cavity body, and the diameter of the plurality of vent hole groups 210 is increased from the opening end of the cavity body to the bottom assembly of the inner wall of the cavity body, so that the switching-on speed of the circuit breaker is not influenced.
In this embodiment, the thickness of the sealing block 211 is less than the separation distance between two adjacent sets of vent holes 210. The diameter of the vent holes of the set of vent hole groups 210 farthest from the open end of the cavity body is more than half of the distance from the stop 28 to the bottom end of the inner wall of the cavity body. When the circuit breaker closes a floodgate, because sealed piece 211 is by the motion of dog 28 toward the inner wall bottom of the cavity body, and the diameter of a plurality of vent group 210 is increased toward cavity body inner wall bottom subassembly by cavity body open end, the diameter of the vent of a set of vent group 210 farthest from cavity body open end is more than half of dog 28 to cavity body inner wall bottom distance, its closing speed can not receive the resistance influence that vent group 210 was extruded to the air current, when monitoring circuit breaker divide-shut brake signal, the closing stability and the reliability of circuit breaker have been improved.
As shown in fig. 6, in this embodiment, a fifth micro switch 112 is disposed on one side of the stopper 28, a sixth micro switch 113 is disposed at the bottom of the inner wall of the cavity, when the movable contact is in place, the sealing block 211 contacts with the sixth micro switch 113 and feeds back a switch-on in-place signal, and when the movable contact is in place, the sealing block 211 contacts with the fifth micro switch 112 and feeds back a switch-off in-place signal. In the moving contact switching-on process, the roller of the sixth micro switch 113 is gradually compressed by the sealing block 211, when the moving contact is switched on in place, the sixth micro switch 113 feeds back a switching-on in place signal, in the moving contact switching-off process, the roller of the fifth micro switch 112 is gradually compressed by the sealing block 211, and when the moving contact is switched off in place, the fifth micro switch 112 feeds back a switching-off in place signal.
By arranging the fifth micro switch 112 and the sixth micro switch 113 in the cavity body, the reliability of the signal feedback mechanism of the vacuum circuit breaker in the invention on the monitoring of the opening and closing signals can be further improved, and the problems of electric arcs and contact burning caused by the fact that the opening and closing of the vacuum circuit breaker cannot be in place and cannot be fed back can be better avoided.
In summary, the signal feedback mechanism of the vacuum circuit breaker disclosed by the invention has the following beneficial technical effects:
1. through the first lug, the second lug, the first microswitch and the second microswitch, the signal feedback mechanism of the vacuum circuit breaker can monitor the opening and closing signals of the circuit breaker, has simple integral structure and is convenient to install and realize;
2. by arranging the third bump, the fourth bump, the third microswitch and the fourth microswitch, the reliability of the signal feedback mechanism of the vacuum circuit breaker on the monitoring of the opening and closing signals can be further improved, and the problems of electric arcs and contact burning caused by the fact that the opening and closing of the vacuum circuit breaker cannot be in place and cannot be fed back can be better avoided;
3. the fifth micro switch and the sixth micro switch are arranged in the cavity body, so that the reliability of the signal feedback mechanism of the vacuum circuit breaker on the monitoring of the opening and closing signals can be further improved, and the problems of electric arcs and contact burning caused by the fact that the opening and closing of the vacuum circuit breaker cannot be in place and cannot be fed back can be better solved.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples, and various configurations may omit, replace, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many of the elements are examples and do not limit the scope of the disclosure or claims herein.
Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, such as well-known circuits, processes, algorithms, structures, and techniques, which have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (8)
1. A signal feedback mechanism of a vacuum circuit breaker comprises a circuit breaker shell, wherein a left arc extinguish chamber and a right arc extinguish chamber are symmetrically arranged in the circuit breaker shell in the left-right direction, a certain distance is reserved between the left arc extinguish chamber and the right arc extinguish chamber, a fixed contact and a movable contact are respectively arranged in the left arc extinguish chamber and the right arc extinguish chamber, the respective movable contacts of the left arc extinguish chamber and the right arc extinguish chamber are respectively connected with a connecting rod mechanism, the connecting rod mechanism comprises a telescopic rod, a sleeve rod and a connecting lever, the telescopic rod is horizontally arranged, one end of the sleeve rod is a cavity body, one end of the telescopic rod is fixedly connected with the leading-out ends of the automatic conducting rods of the left arc extinguish chamber and the right arc extinguish chamber, the other end of the telescopic rod extends into the cavity body and is elastically connected with the sleeve rod, one end of the connecting lever is pivoted with the other end of the sleeve rod, and the other end of the connecting lever is pivoted with an insulating pull rod, the connecting lever rotates along with the up-and-down movement of the insulating pull rod, wherein the insulating pull rod moves up and down to drive the link mechanism to move synchronously so as to drive the moving contacts in the left arc extinguish chamber and the right arc extinguish chamber to realize the opening and closing movement with the corresponding fixed contacts;
a plurality of sliding grooves are uniformly and annularly formed in the inner wall of the cavity body, a sliding block is sleeved on the telescopic rod, the sliding block is located in the cavity body and is in sliding connection with the sliding grooves, a stop block is arranged in the inner wall of the cavity body, the stop block and the sliding block are spaced at a certain distance, a spiral spring is connected between the stop block and the sliding block, the spiral spring is sleeved on the telescopic rod, and the telescopic rod is elastically connected with a sleeve rod through the spiral spring;
the inner wall of the cavity body is annularly provided with a plurality of vent hole groups, the vent hole groups are positioned between the stop block and the bottom of the inner wall of the cavity body, the diameter of vent holes in each vent hole group is equal, the diameters of the vent hole groups are gradually increased from the opening end of the cavity body to the bottom end of the inner wall, the other end of the telescopic rod is provided with a sealing block, the sealing block is attached to the inner wall of the cavity body, when a breaker is switched on, the sealing block is positioned at the bottom of the inner wall of the cavity body, and when the breaker is switched off, the sealing block is attached to the surface of the stop block;
the thickness of the sealing block is smaller than the spacing distance between two adjacent sets of vent hole groups, and the diameter of the vent hole of the set of vent hole group farthest from the opening end of the cavity body is more than half of the distance from the stop block to the bottommost end of the inner wall of the cavity body.
2. The signal feedback mechanism of claim 1, wherein the first microswitch roller is gradually compressed by the first protrusion during the closing of the movable contact, the first microswitch roller feeds back a closing in-place signal when the movable contact is closed in place, the second microswitch roller is gradually compressed by the second protrusion during the opening of the movable contact, and the second microswitch roller feeds back an opening in-place signal when the movable contact is opened in place.
3. The signal feedback mechanism of vacuum circuit breaker according to claim 2, further comprising a third micro switch, a fourth micro switch, a third protrusion and a fourth protrusion, wherein the third micro switch and the fourth micro switch are disposed in the breaker housing, the third protrusion and the fourth protrusion are respectively disposed on the upper side and the lower side of the other crank arm, when the moving contact is in place, the third protrusion contacts with the third micro switch and feeds back a closing in-place signal, and when the moving contact is in place, the fourth protrusion contacts with the fourth micro switch and feeds back a opening in-place signal.
4. The signal feedback mechanism of claim 3, wherein the third micro switch roller is gradually compressed by the third protrusion during the switching-on process of the movable contact, the third micro switch roller feeds back the signal indicating that the switch-on is in place when the movable contact is switched on in place, the fourth micro switch roller is gradually compressed by the fourth protrusion during the switching-off process of the movable contact, and the fourth micro switch roller feeds back the signal indicating that the switch-off is in place when the movable contact is switched off in place.
5. The signal feedback mechanism for a vacuum interrupter as recited in claim 4, wherein said first and third micro-switches each have a first terminal for connecting a cable carrying a moving contact closing in place signal, and said second and fourth micro-switches each have a second terminal for connecting a cable carrying a moving contact opening in place signal.
6. The signal feedback mechanism of vacuum circuit breaker according to claim 5, further comprising a controller, wherein the controller is electrically connected to the first, second, third and fourth micro-switches respectively, and is configured to receive signals indicating that the moving contact is in a closed position and an open position.
7. The signal feedback mechanism for vacuum circuit breaker according to claim 6, further comprising a driving mechanism connected to the insulating rod for driving the insulating rod to move up and down.
8. The signal feedback mechanism for a vacuum interrupter as claimed in claim 7, wherein said driving mechanism is a hydraulic driving mechanism.
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| CN111403228B (en) * | 2020-06-03 | 2020-08-28 | 广东电网有限责任公司 | Vacuum circuit breaker signal feedback mechanism |
| CN114242472B (en) * | 2021-11-05 | 2024-04-16 | 河南平高电气股份有限公司 | Switching-on and switching-off stroke adjusting device, switch operating mechanism and switch |
| CN114413936A (en) * | 2021-11-09 | 2022-04-29 | 上海宇航系统工程研究所 | Rotary multi-angle unlocking in-place signal trigger device |
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| CN101783268A (en) * | 2010-01-13 | 2010-07-21 | 上海贝红通信电器国际有限公司 | Remote control device of circuit breaker |
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