CN215771043U - Arc extinguishing device of circuit breaker - Google Patents
Arc extinguishing device of circuit breaker Download PDFInfo
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- CN215771043U CN215771043U CN202121853292.5U CN202121853292U CN215771043U CN 215771043 U CN215771043 U CN 215771043U CN 202121853292 U CN202121853292 U CN 202121853292U CN 215771043 U CN215771043 U CN 215771043U
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- arc extinguishing
- arc
- insulating chamber
- circuit breaker
- contact
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- 230000003068 static effect Effects 0.000 claims abstract description 29
- 238000007664 blowing Methods 0.000 claims description 21
- 238000010891 electric arc Methods 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 4
- 230000005684 electric field Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The utility model is suitable for the related technical field of circuit breakers, and provides an arc extinguishing device of a circuit breaker, which comprises an insulating chamber, wherein a movable conducting rod and a static conducting rod are respectively arranged on the insulating chamber, a static contact is arranged at the end part of the static conducting rod, and the arc extinguishing device of the circuit breaker further comprises: the movable contact base is arranged at one end, close to the fixed contact, of the movable conducting rod, and is connected with a plurality of floating contacts matched with the fixed contact through elastic connecting pieces, and the floating contacts are arranged corresponding to the fixed contact; the circuit breaker arc extinguishing device provided by the utility model avoids the defect that a single arc extinguishing fence is easy to damage due to arc extinguishing, and ensures the arc extinguishing effect.
Description
Technical Field
The utility model belongs to the technical field of circuit breakers and particularly relates to an arc extinguishing device of a circuit breaker.
Background
The circuit breaker is an important part in electric appliances of power distribution, is mainly used for an industrial low-voltage power system, is used for connecting and breaking the current in a power grid circuit and protecting circuits and power supply equipment from damages caused by faults of overload, undervoltage, short circuit, single-phase grounding and the like, and the function of breaking the overload or short-circuit current by the circuit breaker is mainly completed through an arc extinguish chamber arranged in the circuit breaker.
The electric arc belongs to a gas discharge form, when a switch is closed or opened, enough external voltage exists between a contact and the contact, and when circuit current reaches minimum arc generation current, the electric arc is formed, the electric arc not only has great damage effect on the contact, but also prolongs the time for opening the circuit, and particularly when a circuit breaks down, if the circuit cannot be timely powered off, the electric appliance can be damaged, even a fire disaster is caused, and the safety of personnel and equipment is endangered, so that the electric arc is extinguished by using an arc extinguishing device, and the safety of a switch machine electric appliance is guaranteed.
Most of the existing arc extinguishing devices utilize an arc extinguishing fence to extinguish arc, and the arc extinguishing fence is easily burnt and damaged after long-time use.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model aims to provide an arc-extinguishing device of a circuit breaker, which is mainly used for arc extinguishing by an arc-extinguishing fence in the prior art, and easily causes the problem that the arc-extinguishing fence is burnt and damaged after being used for a long time.
The embodiment of the utility model is realized in such a way that the arc extinguishing device of the circuit breaker comprises an insulating chamber, wherein a movable conducting rod and a static conducting rod are respectively arranged on the insulating chamber, a static contact is arranged at the end part of the static conducting rod, and the arc extinguishing device of the circuit breaker further comprises:
the movable contact base is arranged at one end, close to the fixed contact, of the movable conducting rod, and is connected with a plurality of floating contacts matched with the fixed contact through elastic connecting pieces, and the floating contacts are arranged corresponding to the fixed contact;
and the cooling blowing assembly is arranged on the insulating chamber and is used for cooling and blowing the electric arc generated at the positions of the fixed contact and the floating contact.
Preferably, an infrared emitter and an infrared receiver are respectively installed on the insulating chamber and at the top and the bottom of the movable conducting rod, and the infrared emitter and the infrared receiver are correspondingly arranged;
the movable contact seat is provided with an electrified magnetic attraction piece for adsorbing the floating contact, the infrared transmitter and the infrared receiver are used for controlling the electrified magnetic attraction piece to be electrified according to the distance of the moving conductive rod to move, and the insulating chamber is further provided with a control box electrically connected with the infrared transmitter, the infrared receiver and the electrified magnetic attraction piece.
Preferably, the movable conducting rod and the static conducting rod are respectively arranged on two sides of the insulating chamber, and the top of the inner side of the insulating chamber is provided with a plurality of arc-extinguishing grids.
Preferably, the arc-extinguishing grids are arranged in parallel at equal intervals, and each arc-extinguishing grid comprises:
the arc extinguishing substrate is fixed with the inner wall of the insulating chamber;
the arc extinguishing protrusions are arranged on two sides of each arc extinguishing substrate, and the arc extinguishing protrusions between every two adjacent arc extinguishing substrates are distributed in a staggered mode;
and the arc extinguishing gap is arranged at the bottom of each arc extinguishing substrate.
Preferably, the cooling blow assembly includes:
the air blowing piece is arranged in the cover body, the cover body is covered and fixed at the bottom of the insulating chamber, and the cover body is provided with an air inlet;
the refrigerating element is arranged in the cover body and is matched with the blowing piece; and
the air inlet is formed in the insulating chamber and communicated with the air inlet of the cover body, and the top of the insulating chamber is further provided with an air outlet.
Preferably, a plurality of air outlet holes are arranged, and the air outlet holes and the arc extinguishing grids are distributed at intervals.
Preferably, the outer side of the air outlet hole and the position on the insulating chamber are further covered and fixed with an arc extinguishing net plate.
According to the arc-extinguishing device of the circuit breaker, provided by the embodiment of the utility model, through the arrangement of the floating contact and the elastic connecting piece, when the floating contact and the static contact are separated after being contacted, the compressed elastic connecting piece is quickly bounced off, so that the static contact and the floating contact are more quickly separated, and the electric arc is quickly elongated, so that the electric field intensity between the contacts is reduced, the electric arc can be extinguished to the maximum extent, the electric arc is cooled and blown by matching with the cooling and blowing component, the arc-extinguishing effect is enhanced, and the defect that the single arc-extinguishing grid is easy to damage due to arc extinguishing is avoided.
Drawings
Fig. 1 is an internal structure view of an arc extinguishing apparatus of a circuit breaker according to an embodiment of the present invention;
fig. 2 is a top view of an arc extinguishing device of a circuit breaker according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of an arc-extinguishing grid according to an embodiment of the utility model.
In the drawings: 1. an insulating chamber; 101. an air inlet; 102. an air outlet; 2. a movable conductive rod; 3. a static conductive rod; 4. static contact; 5. arc extinguishing net plate; 6. a movable contact base; 7. a floating contact; 8. an elastic connecting member; 9. electrifying the magnetic attraction piece; 10. an infrared emitter; 11. an infrared receiver; 12. an arc extinguishing grid; 13. a cover body; 14. a refrigeration element; 15. and a blowing piece.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
As shown in fig. 1 to 3, a structure diagram of an arc extinguishing apparatus of a circuit breaker provided in an embodiment of the present invention includes an insulating chamber 1, wherein a moving conductive rod 2 and a static conductive rod 3 are respectively disposed on the insulating chamber 1, a static contact 4 is disposed at an end of the static conductive rod 3, and the apparatus further includes:
the movable contact base 6 is fixedly arranged at one end, close to the static contact 4, of the movable conducting rod 2, the movable contact base 6 is connected with a plurality of floating contacts 7 matched with the static contact 4 through elastic connecting pieces 8, and the floating contacts 7 are arranged corresponding to the static contact 4;
and the cooling blowing component is arranged on the insulating chamber 1 and used for cooling and blowing the electric arc generated at the positions of the fixed contact 4 and the floating contact 7:
in an embodiment of the utility model, through the arrangement of the floating contact 7 and the elastic connecting piece 8, when the floating contact 7 and the static contact 4 are separated after being contacted, the compressed elastic connecting piece 8 is quickly bounced off, so that the static contact 4 and the floating contact 7 are more quickly separated, an electric arc is quickly elongated, the electric field intensity between the contacts is reduced, the electric arc is extinguished, the electric arc is cooled and blown (whether in contact or disconnection) by matching with the cooling and blowing component, the arc extinguishing effect can be enhanced, and the defect that a single arc extinguishing grid is easy to damage during arc extinguishing is avoided.
As shown in fig. 1 to 3, as a preferred embodiment of the present invention, an infrared emitter 10 and an infrared receiver 11 are respectively installed on the insulating chamber 1 and at the top and bottom of the movable conducting rod 2, and the infrared emitter 10 and the infrared receiver 11 are correspondingly installed;
the movable contact base 6 is provided with an electrified magnetic attraction piece 9 for attracting the floating contact 7, the infrared transmitter 10 and the infrared receiver 11 are used for controlling the electrification of the electrified magnetic attraction piece 9 according to the moving distance of the movable conductive rod 2, and the insulating chamber 1 is further provided with a control box (not shown) electrically connected with the infrared transmitter 10, the infrared receiver 11 and the electrified magnetic attraction piece 9.
This embodiment removes certain distance through moving conducting rod 2 when using in the reality, detects through infrared emitter 10 and infrared receiver 11, can inhale piece 9 circular telegram through control circular telegram magnetism and adsorb floating contact 7 for floating contact 7 is more rapid with the separation of static contact 4.
As shown in fig. 1 to 3, as another preferred embodiment of the present invention, the movable conducting rod 2 and the static conducting rod 3 are respectively disposed at two sides of the insulating chamber 1, and a plurality of arc-extinguishing grids 12 are disposed at the top of the inner side of the insulating chamber 1.
In practical application, the movable conducting rod 2 and the static conducting rod 3 are respectively arranged on two sides of the insulating chamber 1, and arc extinguishing can be carried out by matching with the arc extinguishing grating 12.
As shown in fig. 1 to 3, as another preferred embodiment of the present invention, the arc-extinguishing grids 12 are arranged in parallel and equidistantly, and each of the arc-extinguishing grids 12 includes:
the arc extinguishing substrate is fixed with the inner wall of the insulating chamber 1;
the arc extinguishing bulges are arranged on two sides of each arc extinguishing substrate, and the arc extinguishing bulges between every two adjacent arc extinguishing substrates are distributed in a staggered manner, so that the contact area between the arc extinguishing grids and the electric arc can be increased;
and the arc extinguishing gap is arranged at the bottom of each arc extinguishing substrate.
In practical application, the arc generated at the positions of the static contact 4 and the elastic connecting piece 8 can be divided into a plurality of short arcs connected in series by extending the arc-extinguishing grids 12, so that arc extinguishing is performed by using the short arc extinguishing principle.
As shown in fig. 1 to 3, as another preferred embodiment of the present invention, the cooling blowing unit includes:
the air blowing piece 15 is installed in the cover body 13, the cover body 13 is covered and fixed at the bottom of the insulating chamber 1, and the cover body 13 is provided with an air inlet;
the refrigerating element 14 is arranged in the cover body 13 and is matched with the blowing piece 15; and
the air inlet 101 is formed in the insulating chamber 1, the air inlet 101 is communicated with an air inlet of the cover body 13, and an air outlet 102 is formed in the top of the insulating chamber 1.
In the practical application of this embodiment, by starting the refrigeration component 14 and the blowing piece 15, the refrigeration component 14 and the blowing piece 15 are both the prior art, and the model is not limited, and the air inlet of the cover body 13 is used for introducing gas and cooling the gas, and then the gas is blown into the insulating chamber 1 through the air inlet 101, so as to cool and blow the electric arc generated at the positions of the static contact 4 and the floating contact 7, so that the electric arc can be rapidly diffused and cooled, and the arc extinguishing purpose is achieved.
As shown in fig. 1 to 3, as another preferred embodiment of the present invention, a plurality of air outlets 102 are provided, the arc-extinguishing grid 12 is fixed on the top of the insulating chamber 1, and the air outlets 102 and the arc-extinguishing grid 12 are arranged at intervals.
In practical application, the air outlet 102 and the arc extinguishing grating 12 are arranged at intervals, so that arc extinguishing by the arc extinguishing grating and arc extinguishing by gas blowing can be effectively matched, arc extinguishing capability is improved, and arc extinguishing effect is guaranteed.
As shown in fig. 1 to 3, as another preferred embodiment of the present invention, an arc-extinguishing plate 5 is further fixed on the insulating chamber 1 outside the air outlet 102.
When this embodiment is used in practice, further improve protection arc extinguishing ability through the setting of arc extinguishing net board 5, prevent that electric arc from haring the outer (inside the circuit breaker) electrical component of insulating chamber 1.
The embodiment of the utility model provides an arc-extinguishing device of a circuit breaker, through the arrangement of the floating contact 7 and the elastic connecting piece 8, when the floating contact 7 is separated from the static contact 4 after contacting, the compressed elastic connecting piece 8 is quickly bounced off, so that the static contact 4 is more quickly separated from the floating contact 7, and an electric arc is quickly elongated, thereby reducing the electric field intensity between the contacts, further extinguishing the electric arc, cooling and blowing the electric arc by matching with a cooling and blowing component, enhancing the arc-extinguishing effect, and avoiding the defect that a single arc-extinguishing grille extinguishes the electric arc and is easy to damage.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides a circuit breaker arc extinguishing device, includes the insulating chamber, be provided with respectively on the insulating chamber and move conducting rod and static conducting rod, static conducting rod tip is provided with the static contact, its characterized in that, the device still includes:
the movable contact base is arranged at one end, close to the fixed contact, of the movable conducting rod, and is connected with a plurality of floating contacts matched with the fixed contact through elastic connecting pieces, and the floating contacts are arranged corresponding to the fixed contact;
and the cooling blowing assembly is arranged on the insulating chamber and is used for cooling and blowing the electric arc generated at the positions of the fixed contact and the floating contact.
2. The circuit breaker arc extinguishing device according to claim 1, wherein an infrared emitter and an infrared receiver are respectively installed on the insulating chamber and at the top and bottom positions of the movable conducting rod, and the infrared emitter and the infrared receiver are correspondingly arranged;
the movable contact seat is provided with an electrified magnetic attraction piece for adsorbing the floating contact, the infrared transmitter and the infrared receiver are used for controlling the electrified magnetic attraction piece to be electrified according to the distance of the moving conductive rod to move, and the insulating chamber is further provided with a control box electrically connected with the infrared transmitter, the infrared receiver and the electrified magnetic attraction piece.
3. The circuit breaker arc extinguishing apparatus according to claim 2, wherein the moving conductive rod and the stationary conductive rod are respectively disposed at both sides of an insulating chamber, and a plurality of arc-extinguishing grids are disposed at the top of the inside of the insulating chamber.
4. The circuit breaker arc extinguishing apparatus of claim 3, wherein the arc-extinguishing grates are arranged in parallel equidistant, each of the arc-extinguishing grates comprising:
the arc extinguishing substrate is fixed with the inner wall of the insulating chamber;
the arc extinguishing protrusions are arranged on two sides of each arc extinguishing substrate, and the arc extinguishing protrusions between every two adjacent arc extinguishing substrates are distributed in a staggered mode;
and the arc extinguishing gap is arranged at the bottom of each arc extinguishing substrate.
5. The circuit breaker arc extinguishing apparatus of claim 1 or 2, wherein the cooling blow-off assembly comprises:
the air blowing piece is arranged in the cover body, the cover body is covered and fixed at the bottom of the insulating chamber, and the cover body is provided with an air inlet;
the refrigerating element is arranged in the cover body and is matched with the blowing piece; and
the air inlet is formed in the insulating chamber and communicated with the air inlet of the cover body, and the top of the insulating chamber is further provided with an air outlet.
6. The arc extinguishing apparatus of claim 5, wherein the air outlet holes are provided in a plurality, and the air outlet holes are spaced from the arc extinguishing grid.
7. The arc extinguishing apparatus of the circuit breaker according to claim 5, wherein the arc extinguishing plate is further covered and fixed on the outer side of the air outlet hole and on the insulating chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121853292.5U CN215771043U (en) | 2021-08-10 | 2021-08-10 | Arc extinguishing device of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121853292.5U CN215771043U (en) | 2021-08-10 | 2021-08-10 | Arc extinguishing device of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215771043U true CN215771043U (en) | 2022-02-08 |
Family
ID=80073099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121853292.5U Active CN215771043U (en) | 2021-08-10 | 2021-08-10 | Arc extinguishing device of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215771043U (en) |
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2021
- 2021-08-10 CN CN202121853292.5U patent/CN215771043U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Circuit breaker arc extinguishing device Effective date of registration: 20231123 Granted publication date: 20220208 Pledgee: Bank of Nanjing Co.,Ltd. Xuzhou Branch Pledgor: XUZHOU HANTONG ELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2023980066961 |