CN110970260A - Double-break solid-sealed polar pole for capacitor bank switching - Google Patents
Double-break solid-sealed polar pole for capacitor bank switching Download PDFInfo
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- CN110970260A CN110970260A CN201911363507.2A CN201911363507A CN110970260A CN 110970260 A CN110970260 A CN 110970260A CN 201911363507 A CN201911363507 A CN 201911363507A CN 110970260 A CN110970260 A CN 110970260A
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- Prior art keywords
- vacuum arc
- wire outlet
- extinguishing
- extinguishing chamber
- outlet seat
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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
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
A double-break solid-sealed polar pole for capacitor bank switching comprises two vacuum arc-extinguishing chambers which are solid-sealed in a solid-sealed polar pole shell, wherein the moving end of each vacuum arc-extinguishing chamber is connected with an insulating pull rod, the two vacuum arc-extinguishing chambers are in a series structure which is vertically arranged left and right, the two vacuum arc-extinguishing chambers are connected by adopting a transition wire outlet seat, and one vacuum arc-extinguishing chamber is in flexible connection with the transition wire outlet seat; each insulating pull rod drives a movable conducting rod of the vacuum arc extinguish chamber through a connecting rod respectively to perform opening and closing operations on the vacuum arc extinguish chamber; the circuit breaker also comprises an upper wire outlet seat and a lower wire outlet seat which are respectively connected with the vacuum arc-extinguishing chamber to form a main loop conductive part of the circuit breaker; the contact arm sleeve is connected to the pole, and at least one boss is formed at the joint of the pole and the contact arm sleeve. The invention can solve the problem of switch reignition of the capacitor bank switched by the vacuum circuit breaker, and provides a real reassurance product for switching the capacitor bank for power grid users.
Description
Technical Field
The invention relates to a high-voltage vacuum circuit breaker, in particular to a double-break solid-sealed polar pole for switching of a capacitor bank.
Background
The high voltage vacuum circuit breaker refers to a switching device capable of closing, carrying and opening/closing a current under a normal circuit condition and closing, carrying and opening/closing a current under an abnormal circuit condition within a prescribed time. The high-voltage vacuum circuit breaker is used for a capacitor bank without power compensation and needs to be subjected to frequent switching operation, while the overall reignition rate of the conventional vacuum circuit breaker with a single-fracture solid-sealed pole in switching the capacitor bank reaches over 90 percent, and the personal safety of operators can be endangered due to the overvoltage problem caused by the conventional vacuum circuit breaker with the single-fracture solid-sealed pole. Particularly, in the case of 40.5kV rated voltage, the phenomenon of re-ignition caused by the fact that a vacuum circuit breaker adopting a single-fracture pole cuts capacitance is a worldwide problem. In the application occasions of 40.5kV and above, the circuit breaker which adopts sulfur hexafluoride gas as an arc extinguishing medium and an insulating medium has the problems of higher price, large volume, higher requirements on the application, management and operation of the sulfur hexafluoride gas and low service life.
On the basis of the prior art, the series connection of the double-break arc extinguish chambers is a fundamental way for reducing the switch restriking probability of the switched capacitor bank of the vacuum circuit breaker. The existing 40.5kV double-break pole column adopts a voltage-sharing capacitor to realize the voltage-sharing effect of the two arc-extinguishing chambers, but the product yield of the structure solid seal molding is not high, and the partial discharge problem can be caused. Moreover, the contact arm sleeve and the connection part of the pole in the solid-sealed pole are of smooth structures, so that the phenomenon of external creepage along the inner surface is easily caused, and the insulation performance of the circuit breaker is reduced.
In view of the above, the present inventors have made extensive studies and research on various defects and inconveniences caused by the imperfect structural design of the embedded pole.
Disclosure of Invention
The invention aims to provide a double-break solid-sealed polar pole for capacitor bank switching, which can solve the problem of switch reignition of a capacitor bank switched by a vacuum circuit breaker and provide a real reassurance product for switching the capacitor bank for a power grid user.
In order to achieve the above purpose, the solution of the invention is:
a double-break solid-sealed polar pole for capacitor bank switching comprises two vacuum arc-extinguishing chambers which are solid-sealed in a solid-sealed polar pole shell, wherein the moving end of each vacuum arc-extinguishing chamber is connected with an insulating pull rod, the two vacuum arc-extinguishing chambers are in a series structure which is vertically arranged left and right, the two vacuum arc-extinguishing chambers are connected by adopting a transition wire outlet seat, and one vacuum arc-extinguishing chamber is in flexible connection with the transition wire outlet seat; each insulating pull rod drives a movable conducting rod of the vacuum arc extinguish chamber through a connecting rod respectively to perform opening and closing operations on the vacuum arc extinguish chamber; the circuit breaker also comprises an upper wire outlet seat and a lower wire outlet seat which are respectively connected with the vacuum arc-extinguishing chamber to form a main loop conductive part of the circuit breaker; the contact arm sleeve is connected to the pole, and at least one boss is formed at the joint of the pole and the contact arm sleeve.
Furthermore, the connecting part of the pole and the contact arm sleeve forms a sleeve part, the sleeve part is positioned outside the upper wire outlet seat and the lower wire outlet seat, and at least one annular boss is arranged on the sleeve part.
Furthermore, the boss is equipped with two, and one of them is close to utmost point post, and another is kept away from utmost point post.
Furthermore, the insulating pull rod and the connecting rod, and the connecting rod and the movable conducting rod of the vacuum arc extinguish chamber are in threaded connection, and the insulating pull rod, the connecting rod and the movable conducting rod of the vacuum arc extinguish chamber move simultaneously.
And the flexible connection is connected with the movable conducting rod and the lower wire outlet seat of the other vacuum arc-extinguishing chamber.
Furthermore, two vacuum arc-extinguishing chambers form a high vacuum arc-extinguishing chamber and a low vacuum arc-extinguishing chamber, the first vacuum arc-extinguishing chamber is positioned at a high position, the second vacuum arc-extinguishing chamber is positioned at a low position, the top of the first vacuum arc-extinguishing chamber is connected with an upper wire outlet seat, the side surface of the second vacuum arc-extinguishing chamber is connected with a lower wire outlet seat, the first vacuum arc-extinguishing chamber and the second vacuum arc-extinguishing chamber are connected through a transition wire outlet seat which is insulated and fixedly sealed together, and the first vacuum arc-extinguishing chamber and the transition wire outlet seat are connected through.
Furthermore, the lower ends of the insulating pull rods are respectively and independently connected with mechanism parts in the circuit breaker.
After the structure is adopted, the invention can utilize the structure that the double-insulation pull rods respectively and independently move, and can ensure that the fractures of the two vacuum arc-extinguishing chambers are simultaneously connected or disconnected when the main primary loop is switched on and switched off, and the circuit breaker has extremely low asynchronism and certain switching-off speed, thereby effectively avoiding the phenomenon of re-ignition without voltage-sharing.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
fig. 2 is a schematic perspective view of the present invention (hiding the embedded pole housing);
FIG. 3 is a schematic bottom view of two vacuum interrupters of the present invention;
fig. 4 is a cross-sectional view of the present invention.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.
Referring to fig. 1 to 4, the invention discloses a double-break embedded pole for capacitor bank switching, which includes two vacuum arc-extinguishing chambers (a first vacuum arc-extinguishing chamber 21 and a second vacuum arc-extinguishing chamber 22) embedded and sealed in an embedded and sealed pole housing 1, wherein a moving end of each vacuum arc-extinguishing chamber is connected with an insulating pull rod (a first insulating pull rod 31 and a second insulating pull rod 32), and the pole housing 1 is an insulating housing formed after embedded and sealed.
In the invention, the two vacuum arc-extinguishing chambers 2 are in a series structure which is vertically arranged left and right, so that the pole is favorably sealed and formed, the structure is compact, the two vacuum arc-extinguishing chambers form a high vacuum arc-extinguishing chamber and a low vacuum arc-extinguishing chamber, and the vacuum arc-extinguishing chamber positioned at the high position is defined as a first arc-extinguishing chamber 21 and a second vacuum arc-extinguishing chamber 22 positioned at the low position. The circuit breaker further comprises an upper wire outlet seat 41 and a lower wire outlet seat 42 which are respectively connected with the vacuum arc-extinguishing chamber to form a main circuit conducting part of the circuit breaker. As shown in the figure, the top of the first vacuum interrupter 21 is connected to the upper wire outlet base 41, and the side of the second vacuum interrupter 22 is connected to the lower wire outlet base 42. And the first vacuum arc-extinguishing chamber 21 and the second vacuum arc-extinguishing chamber 22 are connected by adopting the transition wire outlet seat 43, and one of the vacuum arc-extinguishing chambers is connected with the transition wire outlet seat 43 by adopting the flexible connection 50, in this embodiment, the first vacuum arc-extinguishing chamber 21 and the transition wire outlet seat 43 adopt the flexible connection 50, so that each vacuum arc-extinguishing chamber can be independently separated and combined, and the two arc-extinguishing chambers can be simultaneously separated and combined.
The upper ends of the insulating pull rods are respectively connected with the movable ends of the two vacuum arc-extinguishing chambers, the two insulating pull rods form respective independent moving structures, the lower ends of the two insulating pull rods can be respectively and independently connected with mechanism parts in the circuit breaker, and the upper ends of the insulating pull rods respectively drive the movable conducting rods of the arc-extinguishing chambers through connecting rods, so that transition and conduction effects can be achieved. As shown in the figure, the upper end of the first insulating pull rod 31 is connected to the moving conducting rod 211 in the first vacuum arc-extinguishing chamber 21, and the upper end of the second insulating pull rod 32 is connected to the moving conducting rod 221 in the second vacuum arc-extinguishing chamber 22, so that the vacuum arc-extinguishing chamber moving conducting rod is driven by the connecting rod to open and close the arc-extinguishing chambers, and sufficient closing self-closing force and opening pulling force are provided for the vacuum arc-extinguishing chambers. Wherein, can make and adopt threaded connection structure between each insulating pull rod and the corresponding connecting rod, adopt threaded connection structure between each connecting rod and the movable conducting rod of corresponding vacuum interrupter, realize the simultaneous movement of three. Since the two vacuum interrupters are formed to have a high and a low, the first connecting rod 61 to which the first vacuum interrupter 21 is connected has a longer length than the second connecting rod 62.
After adopting the structure, when the breaker is used, the breaker fracture switching-on process is as follows:
after the circuit breaker mechanism is switched on and releases energy, the mechanism pushes the first insulating pull rod 31 and the second insulating pull rod 32 to move upwards simultaneously, the first insulating pull rod 31 and the first connecting rod 61 move upwards together along the central axis, and simultaneously drives the movable conducting rod 211 on the first vacuum arc-extinguishing chamber 21 to move upwards together until the movable and fixed contacts of the first vacuum arc-extinguishing chamber 21 are completely contacted; the second insulating pull rod 32 and the second connecting rod 62 move upward together along the central axis, and simultaneously drive the movable conducting rod 221 on the second vacuum arc-extinguishing chamber 22 to move upward together until the movable and stationary contacts of the second vacuum arc-extinguishing chamber 22 are completely contacted; when the first connecting rod 61 and the second connecting rod 62 move upwards, the first flexible connector 51 and the second flexible connector 52 (shown in joint figure 3) also move upwards together at the same time; when the movable and static contacts in the first vacuum arc-extinguishing chamber 21 and the second vacuum arc-extinguishing chamber 22 are completely contacted at the same time, the closing process of the fracture of the circuit breaker is completed.
When the breaker is used, the breaking process of the breaker is as follows:
after the breaker mechanism is opened to release energy, the first pushing insulation pull rod 31 and the second insulation pull rod 32 of the mechanism move downwards simultaneously, the first insulation pull rod 31 and the first connecting rod 61 move downwards together along the central axis, and simultaneously drive the movable conducting rod 211 on the first vacuum arc-extinguishing chamber 21 to move downwards together, at the moment, the movable and static contacts of the first vacuum arc-extinguishing chamber 21 are separated, and the downward movement is stopped until the first insulation pull rod 31 is static; the second insulating pull rod 32 and the second connecting rod 62 move downward together along the central axis, and simultaneously drive the movable conducting rod 221 on the second vacuum arc-extinguishing chamber 22 to move downward together, at this time, the movable and stationary contacts of the second vacuum arc-extinguishing chamber 22 are separated, and the downward movement is stopped until the second insulating pull rod 32 is stationary; when the first connecting rod 61 and the second connecting rod 62 move downwards, the first flexible joint 51 and the second flexible joint 52 also move downwards simultaneously; when the movable and static contacts inside the first vacuum arc-extinguishing chamber 21 and the second vacuum arc-extinguishing chamber 22 are separated to be static, the circuit breaker fracture separation process is completed.
The main primary loop of the invention is as follows:
the solid-sealed polar pole housing 1 formed by injection molding of the insulating material is characterized in that an upper wire outlet seat 41 and a first vacuum arc-extinguishing chamber 21 are sealed integrally, a lower wire outlet seat 42 and a second vacuum arc-extinguishing chamber 22 are also sealed integrally, the first vacuum arc-extinguishing chamber 21 and the second vacuum arc-extinguishing chamber 22 are connected through a transition wire outlet seat 43 which is insulated and sealed together, and after the two vacuum arc-extinguishing chambers are connected through the wire outlet seats, a main primary loop of a vertical left-right arrangement series structure is formed. The first flexible connection 51 is connected with the movable conducting rod 211 of the first vacuum arc-extinguishing chamber 21 and the transition wire outlet seat 43, and the second flexible connection 52 is connected with the movable conducting rod 221 of the second vacuum arc-extinguishing chamber 22 and the lower wire outlet seat 42. The two flexible connection structures ensure that the movable conducting rods of the two vacuum arc-extinguishing chambers can move simultaneously in the switching-on and switching-off processes of the circuit breaker, so that the movable and fixed contacts in the vacuum arc-extinguishing chambers are contacted or separated simultaneously, the two fractures are simultaneously switched on or switched off when the main primary loop is switched on and switched off, and the re-burning phenomenon is effectively avoided.
Furthermore, because the contact arm sleeve (not shown in the figure) is connected to the pole, in order to avoid the external creepage phenomenon when the contact arm sleeve is used and improve the insulating property of the circuit breaker, at least one boss is formed at the joint of the pole and the contact arm sleeve. Referring to fig. 1 and 4, a sleeve portion 7 is formed at the joint of the pole and the contact arm sleeve, the sleeve portion 7 is located outside the upper wire outlet base 41 and the lower wire outlet base 42, and in this embodiment, two bosses 71 are disposed on the sleeve portion 7. The bosses may be annular, and in the double-boss structure of the present embodiment, one of the bosses 71 is close to the pole, and the other boss 71 is far from the pole. Through above-mentioned boss structure, both can increase utmost point post and touch arm sleeve surface creep distance, formed similar profile of tooth interlock structure again for utmost point post and touch arm sleeve fit closely between, this pair of boss structure can play the effect of storing utmost point post and touching arm sleeve inter-insulated silicone grease again moreover, avoids main loop voltage along utmost point post and touch between the arm sleeve pipe external creep phenomenon, has improved the insulating properties of circuit breaker.
After the structure is adopted, the invention can utilize the structure that the double-insulation pull rods respectively and independently move, and can ensure that the fractures of the two vacuum arc-extinguishing chambers are simultaneously connected or disconnected when the main primary loop is switched on and switched off, and the circuit breaker has extremely low asynchronism and certain switching-off speed, thereby effectively avoiding the phenomenon of re-ignition without voltage-sharing.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.
Claims (7)
1. The utility model provides a two break solid seal utmost point post of capacitor bank switching, includes and seals two vacuum interrupter at solid seal utmost point post casing inside solid, and insulating pull rod, its characterized in that are connected to every vacuum interrupter's the end that moves: the two vacuum arc-extinguishing chambers are in a series structure which is vertically arranged left and right, the two vacuum arc-extinguishing chambers are connected by adopting a transition wire outlet seat, and one of the vacuum arc-extinguishing chambers is connected with the transition wire outlet seat by adopting a flexible connection; each insulating pull rod drives a movable conducting rod of the vacuum arc extinguish chamber through a connecting rod respectively to perform opening and closing operations on the vacuum arc extinguish chamber; the circuit breaker also comprises an upper wire outlet seat and a lower wire outlet seat which are respectively connected with the vacuum arc-extinguishing chamber to form a main loop conductive part of the circuit breaker; the contact arm sleeve is connected to the pole, and at least one boss is formed at the joint of the pole and the contact arm sleeve.
2. The capacitor bank switching dual-break embedded pole of claim 1, wherein: the position of the connection between the pole and the contact arm sleeve forms a sleeve part, the sleeve part is positioned outside the upper wire outlet seat and the lower wire outlet seat, and at least one annular boss is arranged on the sleeve part.
3. The double-break embedded pole for capacitor bank switching according to claim 1 or 2, characterized in that: the boss is equipped with two, and one of them is close to utmost point post, and another is kept away from utmost point post.
4. The capacitor bank switching dual-break embedded pole of claim 1, wherein: the insulating pull rod and the connecting rod, and the connecting rod and the movable conducting rod of the vacuum arc extinguish chamber are in threaded connection, and the insulating pull rod, the connecting rod and the movable conducting rod move simultaneously.
5. The capacitor bank switching dual-break embedded pole of claim 1, wherein: the device also comprises two flexible connections, wherein one flexible connection is connected with the movable conducting rod and the transition outgoing line seat of one vacuum arc-extinguishing chamber, and the other flexible connection is connected with the movable conducting rod and the lower outgoing line seat of the other vacuum arc-extinguishing chamber.
6. The capacitor bank-switched dual-break embedded pole according to claim 1 or 5, characterized in that: two vacuum arc-extinguishing chambers form a high vacuum arc-extinguishing chamber, a first vacuum arc-extinguishing chamber is positioned at a high position, a second vacuum arc-extinguishing chamber is positioned at a low position, the top of the first vacuum arc-extinguishing chamber is connected with an upper wire outlet seat, the side surface of the second vacuum arc-extinguishing chamber is connected with a lower wire outlet seat, the first vacuum arc-extinguishing chamber and the second vacuum arc-extinguishing chamber are connected through a transition wire outlet seat which is insulated and fixedly sealed together, and the first vacuum arc-extinguishing chamber and the transition wire outlet seat are connected through flexible connection.
7. The capacitor bank switching dual-break embedded pole of claim 1, wherein: the lower ends of the insulating pull rods are respectively and independently connected with mechanism parts in the circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911363507.2A CN110970260A (en) | 2019-12-26 | 2019-12-26 | Double-break solid-sealed polar pole for capacitor bank switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911363507.2A CN110970260A (en) | 2019-12-26 | 2019-12-26 | Double-break solid-sealed polar pole for capacitor bank switching |
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| Publication Number | Publication Date |
|---|---|
| CN110970260A true CN110970260A (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911363507.2A Pending CN110970260A (en) | 2019-12-26 | 2019-12-26 | Double-break solid-sealed polar pole for capacitor bank switching |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114420496A (en) * | 2021-12-23 | 2022-04-29 | 平高集团有限公司 | DC load switch |
-
2019
- 2019-12-26 CN CN201911363507.2A patent/CN110970260A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114420496A (en) * | 2021-12-23 | 2022-04-29 | 平高集团有限公司 | DC load switch |
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