CN112509893A - SF (sulfur hexafluoride)6Arc extinguish chamber of circuit breaker - Google Patents
SF (sulfur hexafluoride)6Arc extinguish chamber of circuit breaker Download PDFInfo
- Publication number
- CN112509893A CN112509893A CN202011313904.1A CN202011313904A CN112509893A CN 112509893 A CN112509893 A CN 112509893A CN 202011313904 A CN202011313904 A CN 202011313904A CN 112509893 A CN112509893 A CN 112509893A
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- Prior art keywords
- arc contact
- static
- contact
- piston
- chamber
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- Circuit Breakers (AREA)
Abstract
The invention discloses an SF6A circuit breaker arc chute including a stationary end component and a moving end component; the air chamber of the movable end part is divided into an expansion chamber and a pressure air chamber with variable volume by the partition plate of the movable end part, the partition plate is provided with a communicating hole for communicating the expansion chamber and the pressure air chamber, and a valve plate for opening and closing the communicating hole is matched in the expansion chamber. The invention can effectively reduce SF6The resistance of the breaker during opening is further beneficial to reducing the SF of the operating mechanism6The breaker needs to provide operation power when opening.
Description
Technical Field
The invention relates to the field of circuit breakers, in particular to SF6Arc extinguishing chamber of circuit breaker.
Background
SF6The circuit breaker (sulfur hexafluoride circuit breaker) is SF6A circuit breaker with gas as the insulating medium. Due to SF6The gas has excellent insulating and arc-extinguishing performance, so that SF6The circuit breaker has the following advantages:
(1) good on-off performance, large on-off current, short arcing time and no re-ignition overvoltage.
(2) The number of allowed switches is large, the device is suitable for frequent operation, and the overhaul period is long.
(3) The structure is simple, and the fracture resistance of the arc-extinguishing shield is high, so that the fracture number and the insulation support number are reduced.
(4) Compact structure, small volume and small occupied area.
(5)SF6Is inert gas and has no fire hazard.
Existing SF6An arc extinguish chamber of the circuit breaker generally comprises a static end part and a dynamic end part, wherein the static end part comprises a static contact seat positioned on the front side of the dynamic end part, and a static arc contact is arranged on the static contact seat; the movable end part comprises a piston, a nozzle, a movable arc contact and a supporting seat; wherein the piston drives the nozzle and the moving arc contact to move back and forth, and SF is accommodated between the piston and the moving arc contact and the supporting seat6The gas compression chamber is communicated with the nozzle, the nozzle is movably sleeved and abutted against the moving arc contact, and the moving arc contact movably abuts against the static arc contact. Existing SF6When the breaker is in opening operation, the operating mechanism is used for opening operation to drive the piston to move, and the piston drives the moving arc contact and the nozzle to move and simultaneously compresses the volume of the air compression chamber, so that SF in the air compression chamber is driven6The gas can rapidly move to the nozzle for arc extinction; however, before the nozzle moves completely out of the stationary arc contact, an arc between the stationary arc contact and the moving arc contact may cause SF in the plenum chamber6The gas expansion causes large resistance in opening the brake, resulting in the existing SF6The breaker can compress the volume of the pressure air chamber to realize opening only by providing a large operation power by the operating mechanism; and the larger the current cut-off when the breaker is opened, the larger the SF in the air compression chamber6Gas in SF6The larger the expansion amount of the breaker during opening, the SF is further caused6The larger the resistance when the breaker is opened, the larger the operation power needed by the operating mechanism to drive SF6The breaker is opened; and the pressure change of the air compression chamber in the opening process can cause the change of the moving speed of the piston, and the stable performance of the operating mechanism is influenced.
Disclosure of Invention
The invention aims to provide SF6Arc extinguishing chamber of circuit breaker capable of effectively reducing SF6Resistance when the breaker is opened.
In order to achieve the above purpose, the solution of the invention is:
SF (sulfur hexafluoride)6A circuit breaker arc chute including a stationary end component and a moving end component; the static end part comprises a static contact seat positioned on the front side of the movable end part, and a static arc contact is arranged on the static contact seat; the movable end part comprises a piston, a nozzle, a movable arc contact and a supporting seat; the piston, the nozzle, the moving arc contact and the supporting seat penetrate through the front and the back; the piston can move back and forth and is sleeved with the supporting seat; the nozzle is matched with the front end opening of the piston, the static arc contact is movably sleeved on the nozzle, and the nozzle movably abuts against the static arc contact; the movable arc contact can move back and forth and penetrate through the supporting seat, the movable arc contact is movably sleeved with the static arc contact and movably abutted against the static arc contact, an air chamber communicated with the nozzle is formed between the movable arc contact and the piston as well as between the movable arc contact and the supporting seat, the movable arc contact is fixedly connected with the piston through a partition plate, the partition plate divides the front part and the rear part of the air chamber into an expansion chamber and a pressure air chamber, and the partition plate is provided with a communication hole communicated with the expansion chamber and the pressure air chamber; the expansion chamber is communicated with the nozzle, and a valve plate for opening and closing the communication hole is matched in the expansion chamber.
And the static contact seat is also provided with a static main contact surrounding the static arc contact, and the static main contact is movably contacted with the piston.
The piston, the partition plate and the moving arc contact are integrally formed.
The outer wall of the moving arc contact is provided with an annular blocking edge positioned in the expansion chamber, and an annular caulking groove is formed between the annular blocking edge and the partition plate; the valve plate is of an annular structure, and the inner side of the valve plate is embedded in the annular caulking groove.
After the scheme is adopted, in the whole process of opening the brake, before the nozzle is separated from the contact with the static arc contact, the electric arc generated between the static arc contact and the movable arc contact enables the SF in the expansion chamber to be generated6The gas expands to raise the pressure in the expansion chamber, the valve plate seals the communication hole to separate the expansion chamber from the air pressing chamber under the action of the pressure difference between the expansion chamber and the air pressing chamber, and SF in the air pressing chamber6The gas will not expand under the influence of the arc, so that the compression of the chamber does not need to be considered to overcome the SF in the chamber6Gas expansion bandThe influence of the nitrogen and thereby the SF can be reduced6The resistance of the breaker during opening is beneficial to reducing the SF of the actuating mechanism for driving the piston to move6The breaker is required to provide operation power when opening; and SF6SF in expansion chamber when breaker is opened6The air expansion does not cause obstruction to the movement of the piston, so that the operating mechanism can drive the piston to move more smoothly.
Drawings
FIG. 1 is a schematic diagram of the present invention in a closed state;
FIG. 2 is a schematic diagram of the present invention in an open state;
FIG. 3 is a schematic diagram of the present invention during opening;
description of reference numerals:
the static end part A is provided with a static end part A,
a static contact seat 1, a static arc contact 11, a static main contact 12,
the moving-end part B is arranged on the front end of the moving-end part B,
the piston (2) is provided with a piston,
the number of the nozzles 3 is such that,
the moving arc contact 4, the annular retaining edge 41,
a supporting seat (5) is arranged on the supporting seat,
the air chamber 6, the expansion chamber 61, the air compression chamber 62,
the partition plate 7, the communication holes 71,
the valve plate 8 is provided with a valve hole,
an annular rebate 9.
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.
As shown in FIGS. 1 to 3, the present invention discloses an SF6The circuit breaker comprises a circuit breaker arc extinguish chamber, a circuit breaker arc extinguish chamber and a circuit breaker arc extinguish chamber, wherein the circuit breaker arc extinguish chamber comprises a static end part A and a movable end part B; the static end part A comprises a static contact seat 1 positioned on the front side of the movable end part B, and a static arc contact 11 is arranged on the static contact seat 1; the moving end part B comprises a piston 2, a nozzle 3, a moving arc contact 4 and a supporting seat 5; the piston 2, the nozzle 3, the moving arc contact 4 and the supporting seat 5 penetrate through the front and the back; the piston 2 can move back and forth and is sleeved with a supporting seat 5; the nozzle 3 is matched with the front end opening of the piston 2, and the nozzle 3 is movably sleeved with a static arc contact11 and the nozzle 3 movably butts against the static arc contact 11; the movable arc contact 4 can move back and forth and penetrate through the supporting seat 5, the movable arc contact 4 is movably sleeved with the static arc contact 11, the movable arc contact 4 movably abuts against the static arc contact 11, an air chamber 6 communicated with the nozzle 2 is formed between the movable arc contact 4 and the piston 2 as well as between the movable arc contact 4 and the supporting seat 5, and the air chamber 6 is used for containing SF6The gas, moving arc contact 4 is fixedly connected with piston 2 through the baffle 7, this baffle 7 divides the air chamber 6 into expanding chamber 61 and air compression chamber 62 from beginning to end, the volume of the air compression chamber 62 is variable, the baffle 7 has communicating hole 71 communicating expanding chamber 61 and air compression chamber 62; the expansion chamber 61 is communicated with the nozzle 3, and a valve plate 8 for opening and closing the communication hole 71 is matched in the expansion chamber 61.
With reference to fig. 1 to 3, in the opening operation of the present invention, the piston 2 of the moving end component a drives the nozzle 3 and the moving arc contact 4 to move away from the stationary end component B, and at the same time, the volume of the air compression chamber 62 is compressed; during the entire opening process, wherein the arc generated between the stationary arc contact 11 and the moving arc contact 4 causes the SF in the expansion chamber to expand before the nozzle 3 is released from contact with the stationary arc contact 116The gas expands to rapidly increase the pressure in the expansion chamber 61, and the valve sheet 8 seals the communication hole 71 to isolate the expansion chamber 61 from the pressure chamber 62 by the pressure difference between the expansion chamber 61 and the pressure chamber 62, and the SF in the pressure chamber 626The gas does not expand under the influence of the arc, and thus compression of the plenum 62 does not require consideration of overcoming the SF in the plenum 626The influence of gas expansion can further reduce SF6The resistance of the breaker during opening is beneficial to reducing the SF of the actuating mechanism for driving the piston 2 to move6The breaker is required to provide operation power when opening; and SF6SF in expansion chamber 61 when the circuit breaker is opened6The gas expansion does not obstruct the movement of the piston 2, so that the operating mechanism can drive the piston 2 to move more smoothly. The expanded SF of the expansion chamber 61 throughout the opening process, wherein the nozzle 3 is released from contact with the stationary arcing contact 116The gas is rapidly injected at the nozzle 3 to blow out the arc between the stationary arc contact 11 and the moving arc contact 4.
As shown in fig. 1 to 3, the stationary contact block 1 is further provided with a surrounding stationary contactA stationary main contact 12 of the arcing contacts 11, the stationary main contact 12 being in movable contact with the piston 2, such that the piston 2 acts as SF6A static main contact of the circuit breaker is used; and the piston 2, the partition plate 7 and the moving arc contact 4 can be integrally formed.
As shown in fig. 1, an annular blocking edge 41 located in the expansion chamber 61 is arranged on the outer wall of the moving arc contact 4, and an annular caulking groove 9 is formed between the annular blocking edge 41 and the partition plate 7; valve block 8 is the loop configuration, and in valve block 8's inboard gomphosis annular caulking groove 9, spacing is carried out valve block 8 through annular caulking groove 9.
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 (4)
1. SF (sulfur hexafluoride)6Circuit breaker explosion chamber, its characterized in that: comprises a static end part and a dynamic end part;
the static end part comprises a static contact seat positioned on the front side of the movable end part, and a static arc contact is arranged on the static contact seat;
the movable end part comprises a piston, a nozzle, a movable arc contact and a supporting seat; the piston, the nozzle, the moving arc contact and the supporting seat penetrate through the front and the back; the piston can move back and forth and is sleeved with the supporting seat; the nozzle is matched with the front end opening of the piston, the static arc contact is movably sleeved on the nozzle, and the nozzle movably abuts against the static arc contact; the movable arc contact can move back and forth and penetrate through the supporting seat, the movable arc contact is movably sleeved with the static arc contact and movably abutted against the static arc contact, an air chamber communicated with the nozzle is formed between the movable arc contact and the piston as well as between the movable arc contact and the supporting seat, the movable arc contact is fixedly connected with the piston through a partition plate, the partition plate divides the front part and the rear part of the air chamber into an expansion chamber and a pressure air chamber, and the partition plate is provided with a communication hole communicated with the expansion chamber and the pressure air chamber; the expansion chamber is communicated with the nozzle, and a valve plate for opening and closing the communication hole is matched in the expansion chamber.
2. An SF as in claim 16Circuit breaker explosion chamber, its characterized in that: the static contact seat is also provided withAnd the static main contact surrounds the static arc contact and is in movable contact with the piston.
3. An SF as in claim 26Circuit breaker explosion chamber, its characterized in that: the piston, the partition plate and the moving arc contact are integrally formed.
4. An SF as in claim 16Circuit breaker explosion chamber, its characterized in that: the outer wall of the moving arc contact is provided with an annular blocking edge positioned in the expansion chamber, and an annular caulking groove is formed between the annular blocking edge and the partition plate; the valve plate is of an annular structure, and the inner side of the valve plate is embedded in the annular caulking groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313904.1A CN112509893A (en) | 2020-11-20 | 2020-11-20 | SF (sulfur hexafluoride)6Arc extinguish chamber of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313904.1A CN112509893A (en) | 2020-11-20 | 2020-11-20 | SF (sulfur hexafluoride)6Arc extinguish chamber of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112509893A true CN112509893A (en) | 2021-03-16 |
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ID=74959247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011313904.1A Pending CN112509893A (en) | 2020-11-20 | 2020-11-20 | SF (sulfur hexafluoride)6Arc extinguish chamber of circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN112509893A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114758921A (en) * | 2021-12-23 | 2022-07-15 | 平高集团有限公司 | Arc extinguish chamber and circuit breaker using same |
-
2020
- 2020-11-20 CN CN202011313904.1A patent/CN112509893A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114758921A (en) * | 2021-12-23 | 2022-07-15 | 平高集团有限公司 | Arc extinguish chamber and circuit breaker using same |
| CN114758921B (en) * | 2021-12-23 | 2024-03-26 | 平高集团有限公司 | Explosion chamber and use circuit breaker of this explosion chamber |
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