CN212625459U - Arc extinguishing chamber of circuit breaker - Google Patents
Arc extinguishing chamber of circuit breaker Download PDFInfo
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- CN212625459U CN212625459U CN202021550990.3U CN202021550990U CN212625459U CN 212625459 U CN212625459 U CN 212625459U CN 202021550990 U CN202021550990 U CN 202021550990U CN 212625459 U CN212625459 U CN 212625459U
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- circuit breaker
- arc extinguishing
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Abstract
The application discloses explosion chamber of circuit breaker in the circuit breaker technical field, including moving some frame, connecting plate and two arc insulating pieces that parallel, from last polylith arc extinguishing piece to being connected with down between two arc insulating pieces, the slope of arc extinguishing piece sets up, be equipped with the arc angle on the connecting plate, all be equipped with coaxial through-hole on arc angle and the connecting plate, be equipped with the static contact in the through-hole, moving some and being equipped with the main shaft on putting up, moving some one side that puts up and be close to the arc extinguishing piece is equipped with the moving contact, and the moving contact is located the static contact directly over. This application is through the setting of arc isolating piece, arc extinguishing piece, arc angle and arc isolating piece, all has fine arc effect of leading to the electric arc near moving contact and the static contact, and arc extinguishing speed is faster, and arc extinguishing ability is stronger.
Description
Technical Field
The utility model belongs to the circuit breaker field, in particular to explosion chamber of circuit breaker.
Background
In the switching device, electric arcs are usually generated after the circuit is switched off, so that the circuit is still kept in a conducting state on one hand, and the switching-off of the circuit is delayed; on the other hand, the contacts used to make and break the circuit are burnt and the insulation may be damaged, in severe cases even causing explosions and fires in the switchgear, without protecting the distribution network and the power supply equipment. Therefore, what measures to take to extinguish the generated arc as soon as possible is a technical problem that must be addressed.
The arc extinguishing measures adopted so far are about more than ten, such as simple mechanical elongated arc, metal plate arc isolation, compressed air arc blowing, sulfur hexafluoride (SF6) gas arc blowing, quartz sand arc extinguishing, or some auxiliary methods (such as additional transistor devices) and the like, and in most cases, the arc extinguishing measures are combined to increase the arc extinguishing effect.
Chinese patent CN202259109U discloses an arc extinguish chamber of a frame circuit breaker, which comprises an arc-isolating cover, a grid, an arc striking piece, a first arc-isolating wall and a second arc-isolating wall. The arc separation cover is fixed on the top of the first and second arc separation walls, and in order to increase the exhaust area and control the exhaust direction of the arc separation cover, more than one inclined exhaust hole is processed along the transverse axis of the arc separation cover on the premise of ensuring the strength requirement. The two ends of the grid sheet are respectively connected with the inner walls of the first and second arc-isolating walls and are arranged in the arc-extinguishing chamber in a positive-negative staggered manner.
When fault current occurs in a circuit, the contacts of the circuit breaker can be rapidly opened, electric arcs are generated among the contacts, the electric arcs are slightly stagnated, and move to the grid plates along the guide rails under the action of an external magnetic field and pneumatic force, and then the electric arcs are divided into a plurality of short arcs by the grid plates, so that the voltage of the electric arcs is sharply increased, and the electric arcs are extinguished. The motion process of the electric arc in the arc extinguish chamber is a complex phenomenon of mutual coupling and coaction of gas flow, an electric field, a magnetic field and a thermal field. Whether or not the arc can reach the grids quickly and be extinguished reliably is an important criterion for evaluating the performance of low-voltage circuit breakers. Therefore, a circuit breaker arc extinguishing device with high arc striking speed and good arc extinguishing effect is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides an arc extinguishing chamber of circuit breaker that striking is fast, arc extinguishing effect is good.
The present invention provides the following basic scheme: the arc extinguish chamber of the circuit breaker comprises a moving point frame, a connecting plate and two parallel arc isolating pieces, wherein a plurality of arc extinguishing pieces are connected between the two arc isolating pieces from top to bottom, the arc extinguishing pieces are obliquely arranged, arc angles are arranged on the connecting plate, coaxial through holes are formed in the arc angles and the connecting plate, static contacts are arranged in the through holes, a main shaft is arranged on the moving point frame, moving contacts are arranged on one side, close to the arc extinguishing pieces, of the moving point frame, and the moving contacts are located right above the static contacts.
According to the first optimization scheme, based on the basic scheme, the bottom of the moving point frame is provided with an arc isolating piece.
And in the second optimization scheme, based on the first optimization scheme, the arc isolating piece is a polypropylene block. The polypropylene can generate gas at high temperature of the electric arc, and the arc extinguishing effect is improved.
And the optimization scheme III is based on the optimization scheme II, and the number of the arc extinguishing sheets is five.
And based on the third optimization scheme, the inclination angle of the arc extinguishing sheet is 25-35 degrees.
And the optimized scheme is five, and based on the optimized scheme four, the arc extinguishing sheet is provided with a notch for the moving point frame to pass through.
And the connection plate is a conducting plate based on the fifth optimization scheme.
The working principle of the scheme is as follows: the explosion chamber includes the arc extinguishing piece that the vertical direction of polylith was arranged, has formed between the two adjacent arc extinguishing pieces and has led the gas port, can make the metal air current of electric arc root department discharge more fast to the electric arc that drives near moving contact and static contact enters into the explosion chamber fast, and electric arc can cool off fast and extinguish, and the setting of the arc angle of arc extinguishing piece bottom can effectively avoid after the metal air current discharges the arc angle of rebound get back to the explosion chamber after influence each other and electric arc blowout.
The beneficial effect of this scheme does: through the setting of arc isolating piece, arc extinguishing piece, arc angle and arc isolating piece, all have fine arc effect of leading to the electric arc near moving contact and the static contact, arc extinguishing speed is faster, and arc extinguishing ability is stronger.
Drawings
Fig. 1 is a schematic structural diagram of an arc extinguish chamber of the circuit breaker.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the arc extinguishing device comprises a connecting plate 1, an arc isolating sheet 2, an arc extinguishing sheet 3, an arc angle 4, a moving contact 5, a static contact 6, an arc isolating piece 7, a moving point frame 8 and a main shaft 9.
The embodiment is basically as shown in the attached figure 1: an arc extinguish chamber of a circuit breaker comprises a moving point frame 8, a connecting plate 1 and two parallel arc isolating pieces 2, wherein five parallel arc extinguishing pieces 3 are connected between the two arc isolating pieces 2 from top to bottom, the five arc extinguishing pieces 3 are obliquely arranged and have inclination angles of 25-35 degrees, a notch for the moving point frame 8 to pass through is arranged on each arc extinguishing piece 3, the connecting plate 1 is a conducting piece, an arc angle 4 is arranged on the connecting plate 1, coaxial through holes are formed in the arc angle 4 and the connecting plate 1, a static contact 6 is arranged in each through hole, a main shaft 9 is arranged on the moving point frame 8, a moving contact 5 is arranged on one side, close to each arc extinguishing piece 3, of the moving point frame 8, the moving contact 5 is located right above the static contact 6, and an arc isolating piece 7 made of polypropylene is arranged at.
The specific implementation process is as follows: the explosion chamber includes the arc extinguishing piece 3 that the vertical direction of polylith was arranged, has formed between two adjacent arc extinguishing pieces 3 and has led the gas port, can make the metal air current of arc root department discharge more fast to drive near moving contact 5 and the static contact 6 electric arc and enter into the explosion chamber fast, and electric arc can cool off fast and extinguish, and the setting of arc angle 4 of arc extinguishing piece 3 bottom can effectively avoid after the metal air current discharges to influence each other and the arc rebounds back to the explosion chamber after blowout.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. Explosion chamber of circuit breaker, its characterized in that: the movable point frame is provided with a main shaft, one side of the movable point frame, which is close to the arc extinguishing sheets, is provided with a movable contact, and the movable contact is positioned right above the fixed contact.
2. Arc chute of a circuit breaker according to claim 1, characterized in that: and the bottom of the moving point frame is provided with an arc isolating piece.
3. Arc chute of a circuit breaker according to claim 2, characterized in that: the arc isolating piece is a polypropylene block.
4. Arc chute of a circuit breaker according to claim 3, characterized in that: the arc extinguishing pieces are five.
5. Arc chute of a circuit breaker according to claim 4, characterized in that: the inclination angle of the arc extinguishing sheets is 25-35 degrees.
6. Arc chute of a circuit breaker according to claim 5, characterized in that: and the arc extinguishing sheet is provided with a notch for the moving point frame to pass through.
7. Arc chute of a circuit breaker according to claim 6, characterized in that: the connecting plate is a conducting strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021550990.3U CN212625459U (en) | 2020-07-30 | 2020-07-30 | Arc extinguishing chamber of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021550990.3U CN212625459U (en) | 2020-07-30 | 2020-07-30 | Arc extinguishing chamber of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212625459U true CN212625459U (en) | 2021-02-26 |
Family
ID=74730136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021550990.3U Active CN212625459U (en) | 2020-07-30 | 2020-07-30 | Arc extinguishing chamber of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212625459U (en) |
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2020
- 2020-07-30 CN CN202021550990.3U patent/CN212625459U/en active Active
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