CN220856486U - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN220856486U CN220856486U CN202322524312.XU CN202322524312U CN220856486U CN 220856486 U CN220856486 U CN 220856486U CN 202322524312 U CN202322524312 U CN 202322524312U CN 220856486 U CN220856486 U CN 220856486U
- Authority
- CN
- China
- Prior art keywords
- arc
- circuit breaker
- metal
- arc extinguishing
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000002184 metal Substances 0.000 claims abstract description 59
- 238000002955 isolation Methods 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 4
- 230000004888 barrier function Effects 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 229920001778 nylon Polymers 0.000 abstract description 3
- 230000003628 erosive effect Effects 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 description 13
- 238000004880 explosion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model provides a circuit breaker, which at least comprises a circuit breaker shell, an operating mechanism, a contact system and an arc extinguishing system, wherein the arc extinguishing system comprises an arc extinguishing chamber arranged on a circuit breaker shell base, a metal baffle plate and a metal arc-isolating piece which are arranged at the top of the arc extinguishing chamber, one end of the metal arc-isolating piece is connected with the metal baffle plate, and the other end of the metal arc-isolating piece forms an arc channel through being fixed at an air outlet of the circuit breaker shell. The circuit breaker and the metal arc isolation piece thereof provided by the utility model isolate the erosion of the arc to the nylon material shell, avoid the open fire phenomenon of the circuit breaker, and improve the safety performance and the service life of the circuit breaker.
Description
Technical Field
The utility model relates to the field of piezoelectric devices, in particular to a circuit breaker.
Background
The circuit breaker is a mechanical switching device which can be used for switching on, carrying and breaking current under normal circuit conditions and also can be used for switching on, carrying for a certain time and breaking current under specified abnormal circuit conditions such as short circuit conditions, after the existing circuit breaker breaks short circuit current to generate electric arcs, electric arc channels on two sides of a moving path of the electric arcs are made of thermosetting new insulating materials, when the electric arcs pass through an arc extinguishing chamber, gas temperature is high, when the electric arcs pass through the thermosetting new insulating materials to an air outlet of a shell of the circuit breaker, the shell of the circuit breaker is easily ablated, the service life of the circuit breaker is influenced, the electric arcs burn the shell of the circuit breaker, and potential safety hazards are easily caused.
How to design a circuit breaker that can house an arc-ablative enclosure requires further technical exploration.
Disclosure of utility model
Based on the background, the utility model provides the circuit breaker, so that the ablation phenomenon of the shell at the air outlet of the circuit breaker is avoided, and the safety performance and the service life of the circuit breaker are improved.
The utility model discloses a circuit breaker, which at least comprises a circuit breaker shell, an operating mechanism, a contact system and an arc extinguishing system, wherein the arc extinguishing system comprises an arc extinguishing chamber arranged on a base of the circuit breaker shell, and a metal baffle plate and a metal arc isolation piece which are arranged at the top of the arc extinguishing chamber.
Further, one end of the metal arc isolation piece is fixedly connected with the arc extinguishing chamber and the metal baffle, and the other end of the metal arc isolation piece is fixed on the air outlet of the circuit breaker shell to form an arc channel.
Further, the metal arc-isolating piece is of a hollow columnar structure.
Further, the metal baffle is of an arc-shaped structure and is positioned above the arc extinguishing grid sheet in the arc extinguishing chamber.
Further, the vertical direction of explosion chamber still is provided with insulating baffle, the insulating baffle top is provided with a plurality of air vents, insulating baffle top with the metal separates the arc piece and links up perpendicularly.
Further, the contact system comprises a fixed contact and a movable contact, and the bottom of the arc extinguishing chamber is positioned at the breaking position of the fixed contact and the movable contact.
Further, an arc extinguishing grid sheet is arranged in the arc extinguishing chamber, and the electric arc is discharged from the metal arc isolation piece after passing through the arc extinguishing grid sheet.
Further, the section of the metal arc isolation piece is rectangular or circular, and circular through holes and semicircular through holes are formed in the upper surface and the lower surface of the metal arc isolation piece.
Further, a notch is formed in one end, close to the arc extinguishing chamber, of the metal arc isolation piece, and the notch corresponds to the arc extinguishing grid piece.
The beneficial effects of the utility model are as follows:
In the circuit breaker disclosed by the utility model, in the process of opening a contact, an electric arc moves upwards in a space formed by the insulating baffle plate and the arc extinguishing grid plate, and enters the metal arc isolation member through the small hole at the upper end of the insulating baffle plate, so that the temperature of the electric arc is further reduced after entering the metal arc isolation member, and finally the electric arc tends to be extinguished. The metal arc isolation piece isolates the electric arc from ablating the nylon material shell, avoids the electric arc from ablating the air outlet of the circuit breaker, simultaneously avoids the open flame phenomenon of the air outlet of the circuit breaker, and improves the safety performance and the service life of the circuit breaker.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some of the embodiments described in the utility model, and that other drawings can be obtained from these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of an internal component of a circuit breaker according to the present embodiment;
Fig. 2 is a schematic view of another view angle structure of the internal components of the circuit breaker according to the present embodiment;
fig. 3 is a schematic structural diagram of a circuit breaker according to the present embodiment;
Fig. 4 is a schematic structural view of the metal arc isolation member disclosed in the embodiment disposed on a circuit breaker;
Fig. 5 is a schematic structural diagram of an arc extinguishing chamber in the circuit breaker disclosed in the present embodiment;
Fig. 6 is a schematic structural diagram of a metal arc isolation member according to the present embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model become more apparent, the technical solutions in the embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings in the embodiments of the present utility model. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the utility model. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 5, the utility model discloses a circuit breaker, which comprises a circuit breaker shell 8, an operating mechanism 7, a contact system and an arc extinguishing system, wherein the arc extinguishing system comprises an arc extinguishing chamber 4 arranged on a base of the circuit breaker shell 8, a metal baffle plate 6 and a metal arc isolation member 1 which are arranged at the top of the arc extinguishing chamber 4, one end of the metal arc isolation member 1 is fixedly connected with the arc extinguishing chamber 4 and the metal baffle plate 6, and the other end of the metal arc isolation member is arranged at an air outlet of the circuit breaker shell 8 to form an arc channel. The contact system is arranged at the bottom of the circuit breaker shell, the arc extinguishing chamber 4 is positioned between the contact system and the metal arc isolation piece 1, the arc extinguishing chamber 4 is internally provided with an arc extinguishing grid sheet 402, and an arc is discharged from the metal arc isolation piece 1 after passing through the arc extinguishing grid sheet 402. The metal arc isolation member 1 is provided with a notch 103 near one end of the arc extinguishing chamber 4, and the notch 103 corresponds to the arc extinguishing grid 402. The metal arc isolation member 1 is located in the upper space inside the shell so as to exhaust the tail gas of the arc upwards out of the air outlet of the shell, and in the process of disconnecting the contact, the arc moves upwards in the space formed by the insulating baffle 6 and the arc extinguishing grid plate 402 through the small hole at the upper end of the insulating baffle 6 to enter the metal arc isolation member 1, so that the temperature of the arc is further reduced after entering the metal arc isolation member 1, and finally the arc tends to be extinguished. The metal arc isolation piece 1 isolates the arc from ablating the nylon material shell, avoids the open flame phenomenon of the air outlet of the circuit breaker, and improves the safety performance and the service life of the circuit breaker.
Preferably, as shown in fig. 6, the metal arc isolation member 1 has a hollow columnar structure. Further, the cross section of the metal arc isolation member 1 is rectangular or circular, circular through holes 101 and semicircular through holes 102 are formed in the upper surface and the lower surface of the metal arc isolation member 1, in this embodiment, the cross section of the metal arc isolation member 1 is rectangular, the metal arc isolation member 1 is fixed through the circular through holes 101 and the semicircular through holes 102, and the metal arc isolation member 1 with a hollow columnar structure is convenient to discharge an electric arc to the outside of an air outlet of the circuit breaker.
Preferably, as shown in fig. 5, the metal baffle 6 has an arc structure and is located above the arc extinguishing grid 402 in the arc extinguishing chamber 4. The explosion chamber 4 both sides are provided with explosion chamber lateral wall 401, and the vertical direction of explosion chamber 4 still is provided with insulating baffle 2, insulating baffle 2 top is provided with a plurality of air vents, insulating baffle 2 top with metal separates arc piece 1 and links up perpendicularly. In the process that the electric arc passes through the metal arc isolation piece 1, impurities are isolated through the vent holes, for example, the vent holes at the upper end of the insulating baffle plate 2 block metal particles generated by the arc ablation arc extinguishing grid plate 402, so that the temperature of the electric arc is further reduced after the electric arc enters the metal arc isolation piece 1, and meanwhile, the electric arc tail gas can be discharged from the gas outlet of the circuit breaker after the electric arc passes through the arc extinguishing chamber 4.
As shown in fig. 1, the contact system comprises a fixed contact 3 and a movable contact 5, and the bottom of the arc extinguishing chamber 4 is positioned at the breaking position of the fixed contact 3 and the movable contact 5. When a short-circuit current occurs in the circuit, the moving contact 5 of the circuit breaker rotates anticlockwise to leave the fixed contact 3, at this time, an arc is generated between the moving contact 5 and the fixed contact 3, the arc moves towards the arc extinguishing chamber 4 under the action of a magnetic field and air pressure, and then the arc moves upwards in a space formed by the insulating barrier 2 and the arc extinguishing grid sheet 402. The metal arc-isolating piece 1 passes through a small hole at the upper end of the insulating baffle 2 and enters a channel of the metal arc-isolating piece and is further discharged out of the circuit breaker. Eventually the arc tends to extinguish. The metal arc isolation piece 1 isolates the arc from ablating the circuit breaker shell 8, avoids the phenomenon of open fire, and prolongs the service life of the circuit breaker.
The present utility model may be embodied in other specific forms without departing from its spirit or essential characteristics. The present embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. The circuit breaker at least comprises a circuit breaker shell, an operating mechanism, a contact system and an arc extinguishing system, and is characterized in that the arc extinguishing system comprises an arc extinguishing chamber arranged on a circuit breaker shell base, and a metal baffle plate and a metal arc isolation piece arranged at the top of the arc extinguishing chamber.
2. The circuit breaker of claim 1, wherein one end of the metal arc isolation member is connected with the metal baffle plate, and the other end of the metal arc isolation member is arranged at the air outlet of the circuit breaker shell to form an arc channel.
3. The circuit breaker of claim 1, wherein the metallic arc barrier is a hollow cylindrical structure.
4. The circuit breaker of claim 1, wherein the metal shield is of arcuate configuration and is positioned above the arc chute plates in the arc chute.
5. The circuit breaker of claim 1, wherein the arc chute is further provided with an insulating barrier in a vertical direction, a top surface of the insulating barrier is provided with a plurality of vent holes, and a top of the insulating barrier is vertically engaged with the metal arc-isolating member.
6. The circuit breaker according to claim 1, characterized in that the contact system comprises a stationary contact and a moving contact, the bottom of the arc extinguishing chamber being located at the breaking point of the stationary contact and the moving contact.
7. The circuit breaker of claim 1, wherein the arc chute is provided therein with an arc chute through which the arc is discharged from the metal arc separator.
8. The circuit breaker of claim 3, wherein the metal arc-isolating member has a rectangular or circular cross section, and circular through holes and semicircular through holes are formed in the upper and lower surfaces of the metal arc-isolating member.
9. The circuit breaker of claim 7, wherein the metal arc separator is provided with a notch near one end of the arc chute, the notch corresponding to the arc chute blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322524312.XU CN220856486U (en) | 2023-09-18 | 2023-09-18 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322524312.XU CN220856486U (en) | 2023-09-18 | 2023-09-18 | Circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220856486U true CN220856486U (en) | 2024-04-26 |
Family
ID=90771456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322524312.XU Active CN220856486U (en) | 2023-09-18 | 2023-09-18 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220856486U (en) |
-
2023
- 2023-09-18 CN CN202322524312.XU patent/CN220856486U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |