CN209895967U - Arc extinguish chamber of circuit breaker - Google Patents
Arc extinguish chamber of circuit breaker Download PDFInfo
- Publication number
- CN209895967U CN209895967U CN201920013980.7U CN201920013980U CN209895967U CN 209895967 U CN209895967 U CN 209895967U CN 201920013980 U CN201920013980 U CN 201920013980U CN 209895967 U CN209895967 U CN 209895967U
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- Prior art keywords
- quiet
- circuit breaker
- contact
- arc
- moving
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- 238000004880 explosion Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000005684 electric field Effects 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000003068 static effect Effects 0.000 description 8
- 238000009413 insulation Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The embodiment of the utility model discloses a circuit breaker arc extinguish chamber, including shell, shield cover and vacuum circuit breaker, the shield cover axial sets up in the inside of shell, just the shield cover with the inner wall connection of shell, the inside of shield cover is provided with quiet main contact, be connected with quiet arc contact on the inner wall of quiet main contact, the right-hand member of quiet arc contact is provided with the spout, the right-hand member of spout is connected with vacuum circuit breaker, vacuum circuit breaker includes insulating housing, quiet end cover plate and movable end cover plate, the axial through connection has quiet conducting rod on the inner wall of quiet end cover plate, the upper portion of quiet conducting rod passes the spout and is connected with quiet arc contact, and the circuit breaker is in whole breaking process, and the rate of change of contact maximum field intensity is progressively reduced, along with the contact separation, and the electric field distribution of contact progressively reduces, finally tends to even, the medium recovery strength of the breaker in the later stage of breaking is improved, and the service life of the breaker is prolonged.
Description
Technical Field
The embodiment of the utility model provides a relate to circuit breaker technical field, concretely relates to circuit breaker explosion chamber.
Background
Along with the increasing demand of various industries on electric power, the operation process of the whole electric power system also needs to ensure the basic requirements of reliable and continuous power supply, high-quality electric energy quality, operation economy and the like, and the construction of smart power grids, strong power grids and energy internet becomes more and more important. Therefore, the switching device as a core device is also more and more effective in future development.
It is understood that the circuit breaker in the high-voltage switch is the most important type of electrical equipment, and is responsible for not only conducting current and controlling a conducting loop under normal operation, but also closing and opening specified overcurrent at specified time under fault conditions, protecting the power system and preventing accident expansion in the power grid, and is an important component in the whole power generation, transmission and distribution device, and plays an important role in the whole power system.
However, the existing arc extinguishing chamber of the circuit breaker has the following defects:
(1) at present, in the process of using the circuit breaker, the phenomenon that the attribute of the internal part of the circuit breaker disturbs the internal electric field is easy to occur, so that the recovery strength of a medium is weakened in the using process of an element of the circuit breaker, and the service life of the circuit breaker is shortened;
(2) because there are certain randomness and contingency in the process of opening and shutting of circuit breaker explosion chamber, the effect between each physical field simultaneously can lead to the inside electric field condition of circuit breaker explosion chamber to judge very difficultly.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the utility model provides a circuit breaker explosion chamber, whole quiet arc contact and moving arc contact all are in among insulating casing and the shield cover to the component of the circuit breaker that leads to because the attribute of circuit breaker inner part disturbs the phenomenon of inside electric field weakens at the recovery intensity of medium in the use among the solution prior art, makes the problem that circuit breaker life reduces.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: the utility model provides a circuit breaker explosion chamber, includes shell, shield cover and vacuum circuit breaker, the shield cover axial sets up the inside of shell, just the shield cover with the interior wall connection of shell, the inside of shield cover is provided with quiet main contact, be connected with quiet arc contact on the inner wall of quiet main contact, the right-hand member of quiet arc contact is provided with the spout, the right-hand member of spout is connected with vacuum circuit breaker, vacuum circuit breaker includes insulating casing, quiet end cover board and moves the end cover board, quiet end cover board sets up the both ends at insulating casing respectively with moving the end cover board, perpendicular through connection has quiet conducting rod on the inner wall of quiet end cover board, the upper portion of quiet conducting rod is passed the spout and is connected with quiet arc contact, the middle part of quiet conducting rod is still axially connected with the moving contact.
The embodiment of the utility model provides a characterized in that still, the left part of moving contact is connected with the bellows.
The embodiment of the utility model provides a characterized in that still, the left part axial of bellows is connected with moves the conducting rod.
The utility model discloses the characteristic still lies in, the left part of moving contact is the axial connection still has the moving arc contact, the moving arc contact sets up on the right part outer wall of bellows.
The embodiment of the utility model provides a characterized in that still, the outside of moving contact and moving arc contact all is provided with plenum chamber.
The embodiment of the utility model provides a characterized in that still, plenum chamber sets up the inside at insulating casing.
The embodiment of the utility model provides a have following advantage:
(1) the utility model discloses a circuit breaker explosion chamber ensures that whole quiet arc contact and moving arc contact are all in among insulating casing and the shield cover, has reduced the influence of the break-make of circuit breaker to main contact system surface electric field intensity for the circuit breaker is in whole break-make process, and the rate of change of the contact maximum field intensity is progressively reduced, and the inhomogeneous coefficient of electric field is by big diminishing promptly, especially the arc contact, along with the contact separation, the electric field distribution of contact progressively reduces, finally tends to even, is favorable to improving circuit breaker open-make later stage medium recovery strength, has lengthened the life of circuit breaker;
(2) the utility model discloses a circuit breaker explosion chamber can be according to the explosion chamber structure to confirm the static insulating ability of explosion chamber, improve explosion chamber dielectric strength, can increase the distance between the contact, make recovery voltage be higher than breakdown voltage all the time, possess exact insulating arc extinguishing ability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural diagram of the vacuum circuit breaker of the present invention;
in the figure:
1-a housing; 2-a shielding case; 3-a stationary main contact; 4-a stationary arc contact; 5-spraying nozzle; 6-vacuum circuit breaker;
601-an insulating housing; 602-stationary end cover plate; 603-moving end cover plate; 604-a static conductive rod; 605-moving contact; 606-moving arc contacts; 607-bellows; 608-a moving conducting rod; 609-air compression chamber.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides a circuit breaker explosion chamber, including shell 1, shield cover 2 and vacuum circuit breaker 6, 2 axial settings of shield cover are in the inside of shell 1, just shield cover 2 with the interior wall connection of shell 1, the inside of shield cover 2 is provided with quiet main contact 3, be connected with quiet arc contact 4 on the inner wall of quiet main contact 3, the right-hand member of quiet arc contact 4 is provided with spout 5, the right-hand member of spout 5 is connected with vacuum circuit breaker 6.
In the embodiment, the shell 1 is of a hollow cylindrical structure, the inner wall of the shell 1 is connected with the shielding case 2, good static insulating performance is provided for the inside of the arc extinguish chamber, the internal structure of the arc extinguish chamber is optimized, the insulating strength of the arc extinguish chamber is improved, and therefore the distance between contacts is increased.
As shown in fig. 2, the vacuum circuit breaker 6 includes an insulating housing 601, a stationary end cover 602 and a moving end cover 603, the stationary end cover 602 and the moving end cover 603 are respectively disposed at two ends of the insulating housing 601, a stationary conductive rod 604 is vertically connected to an inner wall of the stationary end cover 602 in a penetrating manner, an upper portion of the stationary conductive rod 604 passes through a nozzle 5 to be connected to a stationary arc contact 4, a moving contact 605 is axially connected to a middle portion of the stationary conductive rod 604, a bellows 607 is axially connected to a left portion of the moving contact 605, a moving conductive rod 608 is axially connected to a left portion of the bellows 607, a moving arc contact 606 is axially connected to a left portion of the moving contact 605, the moving arc contact 606 is disposed on an outer wall of a right portion of the bellows 607, a pneumatic chamber 609 is disposed outside the moving contact 605 and the moving arc contact 606, and the pneumatic chamber 609 is disposed inside the insulating housing 601.
In the area between the movable and static arc contacts, because the potential lines near the surface of the contact are distributed densely and have larger distortion deformation, the contact belongs to the area with larger electric field intensity, because the external metal shielding cover and each contact structure cause the distortion of the electric field, two insulation breakdown channels are possibly formed between the movable arc and the static arc as well as between the movable arc and the static main, and simultaneously, compared with the two arc contacts, the potential lines at the position of the main contact are looser, and the overtravel of the movable contact 605 is designed to be smaller than the overtravel between the arc contacts, so that the main contact of the circuit breaker is better than the opening of the arc contacts, therefore, if the recovery voltages are the same, the electric field intensity of the main contact is smaller, and the situation that the insulation breakdown cannot occur between the main contacts is determined.
In the whole process of opening the end of the circuit breaker, the position where the electric field intensity appears most is mainly concentrated on the static arc contact and the moving arc contact, and the size of the electric field intensity continuously rises along with the reduction of the opening distance, therefore, the insulation structure design is carried out in the arc extinguish chamber, the insulation shell is utilized to ensure that the whole static arc contact and the moving arc contact are both positioned in the insulation shell and the shielding cover, the influence of the opening and the closing of the circuit breaker on the surface electric field intensity of a main contact system is reduced, the circuit breaker is in the whole opening and closing process, the change rate of the maximum field intensity of the contact is gradually reduced, namely, the uneven coefficient of the electric field is gradually reduced, particularly, the arc contact is separated along with the contact, the electric field distribution of the contact is gradually reduced.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (6)
1. The utility model provides a circuit breaker explosion chamber, includes shell (1), shield cover (2) and vacuum circuit breaker (6), shield cover (2) axial sets up the inside of shell (1), just shield cover (2) with the interior wall connection of shell (1), its characterized in that: the inside of shield cover (2) is provided with quiet main contact (3), be connected with quiet arc contact (4) on the inner wall of quiet main contact (3), the right-hand member of quiet arc contact (4) is provided with spout (5), the right-hand member of spout (5) is connected with vacuum circuit breaker (6), vacuum circuit breaker (6) are including insulating casing (601), quiet end cover board (602) and move end cover board (603) and set up respectively at the both ends of insulating casing (601), perpendicular through connection has quiet conducting rod (604) on the inner wall of quiet end cover board (602), the upper portion of quiet conducting rod (604) is passed spout (5) and is connected with quiet arc contact (4), the middle part of quiet conducting rod (604) still axial connection has moving contact (605).
2. A circuit breaker arc chute according to claim 1 characterized in that: the left part of the moving contact (605) is connected with a corrugated pipe (607).
3. A circuit breaker arc chute according to claim 2 characterized in that: the left part of the corrugated pipe (607) is axially connected with a movable conducting rod (608).
4. A circuit breaker arc chute according to claim 1 characterized in that: the left part of the moving contact (605) is also axially connected with a moving arc contact (606), and the moving arc contact (606) is arranged on the outer wall of the right part of the corrugated pipe (607).
5. A circuit breaker arc chute according to claim 1 characterized in that: and air compression chambers (609) are arranged outside the moving contact (605) and the moving arc contact (606).
6. A circuit breaker arc chute according to claim 5 wherein: the plenum (609) is disposed inside the insulating housing (601).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920013980.7U CN209895967U (en) | 2019-01-04 | 2019-01-04 | Arc extinguish chamber of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920013980.7U CN209895967U (en) | 2019-01-04 | 2019-01-04 | Arc extinguish chamber of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209895967U true CN209895967U (en) | 2020-01-03 |
Family
ID=69015697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920013980.7U Expired - Fee Related CN209895967U (en) | 2019-01-04 | 2019-01-04 | Arc extinguish chamber of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209895967U (en) |
-
2019
- 2019-01-04 CN CN201920013980.7U patent/CN209895967U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200103 |