CN116313589A - Arc extinguishing system and circuit breaker - Google Patents
Arc extinguishing system and circuit breaker Download PDFInfo
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- CN116313589A CN116313589A CN202310354581.8A CN202310354581A CN116313589A CN 116313589 A CN116313589 A CN 116313589A CN 202310354581 A CN202310354581 A CN 202310354581A CN 116313589 A CN116313589 A CN 116313589A
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- 238000000926 separation method Methods 0.000 claims description 10
- 238000010891 electric arc Methods 0.000 abstract description 28
- 230000003068 static effect Effects 0.000 abstract description 5
- 238000004880 explosion Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 5
- 238000010494 dissociation reaction Methods 0.000 description 4
- 230000005593 dissociations Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses an arc extinguishing system for improving the number of grid plates, optimizing the trend of an electric arc and improving the utilization rate of the grid plates, which comprises the following steps: the arc-extinguishing device comprises an arc-separating wall, a first arc-extinguishing grid sheet set, a second arc-extinguishing grid sheet set, a third arc-extinguishing grid sheet set, an arc striking plate, a fixed contact arc striking sheet and a moving contact arc striking sheet; the arc-extinguishing grid sheet groups in the arc-extinguishing chamber are distributed on the left side, the right side and the lower side respectively by adopting U-shaped, so that the number of the grid sheets which can be placed in the arc-extinguishing chamber is increased, and the arc breaking capacity of the arc-extinguishing chamber is further improved; the static contact arc striking sheet, the moving contact arc striking sheet and the arc striking plate are adopted to optimize the trend of the electric arc, so that the electric arc can be fully cut by each arc extinguishing grid sheet group, the utilization rate of the grid sheets is improved, and the capacity of breaking the electric arc of the arc extinguishing chamber is improved; the capacity of breaking critical load current is enhanced, the damage of the critical load current to the moving contact and the fixed contact is reduced, and the capacity of breaking full-voltage short-circuit current with single pole is provided.
Description
Technical Field
The invention relates to the technical field, in particular to an arc extinguishing system and a circuit breaker.
Background
Along with the large-scale construction and planning of new energy systems such as photovoltaic, wind power, energy storage, charging piles and the like, the direct current power transmission and distribution system is brought into a rapid development golden period, and particularly the double carbon target is put forward, so that the energy structure transformation is further accelerated, and renewable energy sources become dominant. With the increasing system power of renewable energy sources, the requirements on breaking performance of circuit breakers for AC and DC power distribution protection are also increasing.
The explosion chamber is the main component part of circuit breaker, and its ability of extinguishing electric arc directly influences the breaking capacity of circuit breaker, and current explosion chamber has following not enough:
the number of the grid sheets in the arc extinguishing chamber is limited, so that the length of the elongated arc is limited, and the more the number of the grid sheets is, the more the arc is favorable for cutting the arc, and the breaking capacity is improved, namely, the breaking capacity of the circuit breaker is limited by the number of the grid sheets.
The trend of the electric arc is single, the electric arc is difficult to ensure that the electric arc is fully cut by the grid sheet on the existing trend, and the utilization rate of the grid sheet is not high; when the circuit breaker breaks critical load current, arc roots at two sides stay on the moving contact and the static contact, and the arc column is only bent towards the direction of the grid sheet group and does not enter the grid sheet group, so that breaking capacity of the circuit breaker is affected, and the moving contact and the static contact are damaged.
The exhaust effect of the exhaust channel of the arc extinguishing chamber is general, the flashover distance is relatively long, and the breaking capacity of the circuit breaker is influenced.
In view of this, how to provide an arc extinguishing chamber capable of improving breaking capacity of a circuit breaker is a problem to be solved by those skilled in the art.
Disclosure of Invention
The present invention aims to solve, at least to some extent, one of the above technical problems in the prior art.
Therefore, an object of the present invention is to provide an arc extinguishing system for increasing the number of grid sheets, optimizing the trend of electric arc, and increasing the utilization rate of the grid sheets, which specifically includes:
the arc separation wall is fixedly arranged in the arc extinguishing chamber;
a first arc-extinguishing gate sheet set which is arranged near the left side of the arc-separating wall
The first arc extinguishing grid plate group is provided with a plurality of first grid plates which are transversely arranged and are longitudinally and uniformly arranged on the arc separation wall at intervals;
the second arc-extinguishing grid plate group is arranged close to the lower side of the arc-separating wall, and is provided with a plurality of second grid plates which are longitudinally arranged and are uniformly arranged on the arc-separating wall at intervals along the transverse direction; the first grid sheet positioned at the bottommost end is electrically connected with the second grid sheet positioned at the leftmost end;
the third arc-extinguishing grid sheet group is arranged close to the right side of the arc-separating wall, the second arc-extinguishing grid sheet group is provided with a plurality of third grid sheets, and the third grid sheets are transversely arranged and uniformly arranged on the arc-separating wall at intervals along the longitudinal direction; the second grid sheet positioned at the rightmost end is electrically connected with the third grid sheet positioned at the bottommost end;
the bottom of the arc striking plate is electrically connected with one or more second grid sheets;
the fixed contact arc striking sheet is fixedly arranged on the arc separation wall along the horizontal direction, one end of the fixed contact arc striking sheet is electrically connected with the fixed contact, and the fixed contact arc striking sheet is positioned above the uppermost first grid sheet;
the movable contact arc striking piece is fixedly arranged on the arc separation wall along the horizontal direction, the movable contact arc striking piece is positioned at the uppermost end above the third grid piece, one end of the movable contact arc striking piece, which is close to the movable contact, is bent to form an arc surface, and when the movable contact and the fixed contact are completely disconnected, the movable contact is electrically connected with the arc surface.
Compared with the prior art, the invention has the beneficial effects that:
the arc-extinguishing grid sheet groups in the arc-extinguishing chamber are distributed on the left side, the right side and the lower side respectively by adopting U-shaped, so that the number of the grid sheets which can be placed in the arc-extinguishing chamber is increased, and the arc breaking capacity of the arc-extinguishing chamber is further improved.
The static contact arc striking sheet, the moving contact arc striking sheet and the arc striking plate are adopted to optimize the trend of the electric arc, so that the electric arc can be fully cut by each arc extinguishing grid sheet group, the utilization rate of the grid sheets is improved, and the capacity of breaking the electric arc of the arc extinguishing chamber is improved; in addition, the optimization of the trend of the electric arc also enhances the capacity of breaking critical load current, reduces the damage of the critical load current to the moving contact and the fixed contact, and ensures that the circuit breaker has the capacity of breaking full-voltage short-circuit current by the single-pole arc extinguishing chamber.
Further, the first grid sheet and/or the second grid sheet and/or the third grid sheet are V-shaped.
The beneficial effects of adopting above-mentioned technical scheme are:
when the electric arc enters the V-shaped grid plate, the resistance can be greatly reduced, the magnetic circuit can be optimized, the suction force received by the electric arc is enhanced, and the electric arc is accelerated to enter the arc extinguishing chamber.
Further, the arc striking plate comprises a supporting part and an arc plate which are integrally formed, the supporting part is of a T shape, the bottom of the supporting part is electrically connected with one or more second grid sheets, and two arc plates are respectively connected with two ends of the supporting part.
The arc striking plate with the arc-shaped plate can better lead in and throw out the electric arc, and can also improve the speed of the electric arc movement.
Preferably, the thickness of the first grating sheet is 0.8-2.0 mm, the distance between two adjacent first grating sheets is 0.8-2.0 mm, the thickness of the second grating sheet is 0.8-2.0 mm, the distance between two adjacent second grating sheets is 0.8-2.0 mm, the thickness of the third grating sheet is 0.8-2.0 mm, and the distance between two adjacent third grating sheets is 0.8-2.0 mm.
Compared with the existing product, the thickness and the spacing of each grid plate are increased, the thickness of each grid plate has influence on arc voltage, and the field intensity between the arc columns is increased along with the increase of the thickness of each grid plate; the air gap between the grids has influence on arc voltage, and the increase of the distance between the grids can increase the field intensity between the arc columns. In general, the number of the bars can be increased to improve the arc extinguishing and extinguishing capability, the thickness of the bars can be increased to improve the heat capacity of the bars of the arc extinguishing chamber, the distance between the bars is increased, the electric arc can enter the gap, and the movement speed and the cooling and heat dissipation effects of the cut short electric arc in the bars can be ensured.
The application also provides a circuit breaker, including above-mentioned arc extinguishing system, still include:
the inner base is internally provided with a first exhaust channel corresponding to the first arc-extinguishing grid sheet group, the second arc-extinguishing grid sheet group and the third arc-extinguishing grid sheet group;
the outer base is arranged outside the inner base, and a support column is arranged between the outer base and the inner base; the outer base is provided with a plurality of second exhaust channels, and the positions of the first exhaust channels and the second exhaust channels are not corresponding.
Compared with the prior art, the beneficial effects are as follows:
the gas that the explosion chamber in-process produced is discharged from first exhaust passage, the clearance between interior base and the outer base and second exhaust passage in proper order, because first exhaust passage and the position of second exhaust passage do not correspond, consequently gas can follow vertical direction in the clearance between interior base and the outer base and rise or descend certainly, and then form "chimney effect", accelerate convection current, and then accelerate the motion speed of electric arc, reduce electric arc energy and flashover distance, improve the breaking capacity of explosion chamber, avoid interior circuit breaker to burst.
Preferably, the thickness of the first exhaust passage is: 5-50 mm, the angle is 20-180 degrees, the thickness of second exhaust passage is 5-50 mm, and the angle is 20-180 degrees.
The first exhaust passage and the second exhaust passage with the sizes can ensure the strength of the shell, reduce the gas resistance, accelerate the gas flow speed, cool the arc energy and reduce the arcing distance.
Further, a dissociation device is arranged in the second exhaust channel.
The dissociation device has the functions of reducing the arc temperature, ensuring the internal pressure to be stable and further avoiding the explosion of the circuit breaker.
Further, a gap is formed between the first exhaust channel and the first arc-extinguishing grid sheet set, the second arc-extinguishing grid sheet set or the third arc-extinguishing grid sheet set, and the gap is 0.8-2.0 mm.
The gap can be used as a gas pressure decompression area to form a gas pressure gradient, so that the gas is discharged, back breakdown is prevented, the movement speed of a cut short arc in a grid sheet and the cooling and radiating effects can be ensured, and the dissociation effect is enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an arc extinguishing system;
fig. 2 is a schematic diagram of a circuit breaker having an arc extinguishing system;
FIG. 3 is a schematic diagram of breaking early fault current (the curves in the figure are arc trends, and do not represent any structure);
FIG. 4 is a schematic diagram of fault current in the middle of the break (the curves in the figure are arc trends, and do not represent any structure);
FIG. 5 is a schematic diagram of a fault current in the late breaking stage (the curves in the figure are arc trends and do not represent any structure);
FIG. 6 is a schematic diagram of the exhaust gas during arc extinction (arrows in the drawing indicate gas trend, and do not represent any structure);
the device comprises a 1-arc separation wall, a 2-first arc extinguishing grid sheet set, a 3-second arc extinguishing grid sheet set, a 4-third arc extinguishing grid sheet set, a 5-arc striking plate, a 501-supporting part, a 502-arc plate, a 6-fixed contact arc striking sheet, a 7-moving contact arc striking sheet, an 8-fixed contact, a 9-moving contact, a 10-inner base, a 1001-first exhaust channel, an 11-outer base and a 1101-second exhaust channel.
Description of the embodiments
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Examples
The embodiment of the invention discloses an arc extinguishing system, which specifically comprises:
the arc-separating wall 1, the arc-separating wall 1 is fixedly arranged in the arc extinguishing chamber;
a first arc-extinguishing gate sheet group 2, the left side of the first arc-extinguishing gate sheet group 2 close to the arc-separating wall 1 is provided with
The first arc extinguishing grid plate group 2 is provided with a plurality of first grid plates which are transversely arranged and uniformly arranged on the arc separating wall 1 at intervals along the longitudinal direction;
the second arc-extinguishing grid sheet group 3 is arranged close to the lower side of the arc-separating wall 1, the second arc-extinguishing grid sheet group 3 is provided with a plurality of second grid sheets, and the second grid sheets are longitudinally arranged and uniformly arranged on the arc-separating wall 1 at intervals along the transverse direction; the first grid sheet positioned at the bottommost end is electrically connected with the second grid sheet positioned at the leftmost end;
the third arc-extinguishing grid sheet group 4 is arranged close to the right side of the arc-separating wall 1, the second arc-extinguishing grid sheet group 3 is provided with a plurality of third grid sheets, and the third grid sheets are transversely arranged and uniformly arranged on the arc-separating wall 1 at intervals along the longitudinal direction; the second grid sheet positioned at the rightmost end is electrically connected with the third grid sheet positioned at the bottommost end;
the arc striking plate 5, the arc striking plate 5 comprises a supporting part 501 and an arc plate 502 which are integrally formed, the supporting part 501 is in a T shape, the bottom of the supporting part is electrically connected with one or more second grid sheets, two arc plates 502 are respectively connected with two ends of the supporting part 501;
the fixed contact arc striking sheet 6 is fixedly arranged on the arc separation wall 1 along the horizontal direction, one end of the fixed contact arc striking sheet 6 is electrically connected with the fixed contact 8, and the fixed contact arc striking sheet 6 is positioned above the uppermost first grid sheet;
the movable contact arc striking piece 7, the movable contact arc striking piece 7 is fixed to be set up on the partition arc wall 1 along the horizontal direction, and the movable contact arc striking piece 7 is located the top of the third bars piece of uppermost, and the one end that movable contact arc striking piece 7 is close to movable contact 9 is crooked to form the arcwall, and when movable contact 9 and stationary contact 8 break completely, movable contact 9 is connected with the arcwall electricity.
In some embodiments, the first and/or second and/or third gate is V-shaped.
In some embodiments, the first grating sheet has a thickness of 0.8-2.0 mm, the adjacent two first grating sheets have a distance of 0.8-2.0 mm, the second grating sheet has a thickness of 0.8-2.0 mm, the adjacent two second grating sheets have a distance of 0.8-2.0 mm, the third grating sheet has a thickness of 0.8-2.0 mm, and the adjacent two third grating sheets have a distance of 0.8-2.0 mm.
Examples
The application also provides a circuit breaker, including above-mentioned arc extinguishing system, still include:
the inner base 10, the inner base 10 defines the arc-extinguishing chamber, the inner base 10 corresponds to the first arc-extinguishing grating sheet group 2, the second arc-extinguishing grating sheet group 3 and the third arc-extinguishing grating sheet group 4 and is provided with a first exhaust passage 1001;
an outer base 11, the outer base 11 being provided outside the inner base 10, a support column being provided between the outer base 11 and the inner base 10; the outer base 11 is provided with a plurality of second exhaust passages 1101, and the positions of the first exhaust passages 1001 and the second exhaust passages 1101 do not correspond.
In the present embodiment, a dissociation device is provided in the second exhaust passage 1101.
In some embodiments, the thickness of the first exhaust channel 1001 is: 5-50 mm, the angle is 20-180 DEG, the thickness of the second exhaust passage 1101 is 5-50 mm, and the angle is 20-180 deg.
In some embodiments, a gap is formed between the first exhaust channel 1001 and the first arc extinguishing gate sheet group 2 or the second arc extinguishing gate sheet group 3 or the third arc extinguishing gate sheet group 4, and the gap is 0.8-2.0 mm.
The specific working process is as follows:
(1) Arc extinguishing process
(1) Breaking initial fault current
As shown in fig. 3, the moving contact 9 and the fixed contact 8 start to separate, an arc is formed between the moving contact 9 and the fixed contact 8, and the arc root moves onto the conductive path of the fixed contact arc striking plate 6 due to the equipotential of the fixed contact arc striking plate 6 and the fixed contact 8. Meanwhile, since the first exhaust passage 1001 is provided at the bottom of the inner base 10, the arc receives less gas resistance in the arc extinguishing chamber, and the arc moving speed can be increased. The initial arc is attracted by the arc striking plate 5, under the action of magnetic blowing and air blowing, the initial arc gradually enters the arc extinguishing chamber along the arc striking plate 5, and the arc is led into the left half part of the first arc extinguishing grid set 2 and the second arc extinguishing grid set 3 due to the arc striking plate 5 provided with the arc striking plate 502, and the arc is cut and extinguished by the first arc extinguishing grid set 2 and the second arc extinguishing grid set 3.
(2) Breaking mid-term fault current
As shown in fig. 4, the moving contact 9 is further separated from the fixed contact 8, and the electric arcs entering the left half parts of the first arc-extinguishing grid sheet group 2 and the second arc-extinguishing grid sheet group 3 through the fixed contact arc striking sheet 6 and the arc striking plate 5 are affected by electromagnetic attraction and quickly enter the right half part of the second arc-extinguishing grid sheet group 3, and the electric arcs are cut and extinguished by the first arc-extinguishing grid sheet group 2 and the second arc-extinguishing grid sheet group 3.
(3) Breaking the late fault current
As shown in fig. 5, the moving contact 9 is completely opened, and the moving contact 9 is in contact with the moving contact arc striking plate 7 to form electrical connection, and at this time, the moving contact 9 and the moving contact arc striking plate 7 are in equipotential connection. The arc rapidly enters the arc extinguishing grid plates of the third arc extinguishing grid plate group 4 under the guiding action of the moving contact arc striking plate 7 and the arc striking plate 5. At this time, the electric arc has all entered the inside of the first, second, and third arc extinguishing gate groups 2, 3, and 4, and is cut and extinguished by the three arc extinguishing gate groups.
Exhaust process
As shown in fig. 6, gas generated during arc extinguishing in the arc extinguishing chamber is sequentially discharged from the first exhaust passage 1001, the gap between the inner base 10 and the outer base 11, and the second exhaust passage 1101. The arc extinguishing chamber has an exhaust passage, and gas can smoothly enter the first exhaust passage 1001.
The invention provides an arc extinguishing system and a breaker, wherein arc extinguishing grid sheet groups in an arc extinguishing chamber are distributed on the left side, the right side and the lower side respectively by adopting U-shaped, so that the number of grid sheets capable of being placed in the arc extinguishing chamber is increased, and the arc breaking capacity of the arc extinguishing chamber is further improved; the static contact arc striking sheet, the moving contact arc striking sheet and the arc striking plate are adopted to optimize the trend of the electric arc, so that the electric arc can be fully cut by each arc extinguishing grid sheet group, the utilization rate of the grid sheets is improved, and the capacity of breaking the electric arc of the arc extinguishing chamber is improved; the capacity of breaking critical load current is enhanced, the damage of the critical load current to the moving contact and the fixed contact is reduced, and the capacity of breaking full-voltage short-circuit current with single pole is provided. The gas that explosion chamber arc extinguishing in-process produced is discharged from first exhaust passage, clearance and second exhaust passage between interior base and the outer base in proper order, and the exhaust in-process forms "chimney effect", accelerates convection current, and then accelerates the motion speed of electric arc, reduces electric arc energy and flashover distance, improves the breaking capacity of explosion chamber, avoids interior circuit breaker to burst.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (8)
1. An arc extinguishing system, an arc extinguisher having a moving contact and a fixed contact, comprising:
the arc separation wall is fixedly arranged in the arc extinguishing chamber;
a first arc-extinguishing gate sheet set, which is close to the left side of the arc-separating wall
The first arc extinguishing grid plate group is provided with a plurality of first grid plates which are transversely arranged and are longitudinally and uniformly arranged on the arc separation wall at intervals;
the second arc-extinguishing grid plate group is arranged close to the lower side of the arc-separating wall, and is provided with a plurality of second grid plates which are longitudinally arranged and are uniformly arranged on the arc-separating wall at intervals along the transverse direction; the first grid sheet positioned at the bottommost end is electrically connected with the second grid sheet positioned at the leftmost end;
the third arc-extinguishing grid sheet group is arranged close to the right side of the arc-separating wall, the second arc-extinguishing grid sheet group is provided with a plurality of third grid sheets, and the third grid sheets are transversely arranged and uniformly arranged on the arc-separating wall at intervals along the longitudinal direction; the second grid sheet positioned at the rightmost end is electrically connected with the third grid sheet positioned at the bottommost end;
the bottom of the arc striking plate is electrically connected with one or more second grid sheets;
the fixed contact arc striking sheet is fixedly arranged on the arc separation wall along the horizontal direction, one end of the fixed contact arc striking sheet is electrically connected with the fixed contact, and the fixed contact arc striking sheet is positioned above the uppermost first grid sheet;
the movable contact arc striking piece is fixedly arranged on the arc separation wall along the horizontal direction, the movable contact arc striking piece is positioned at the uppermost end above the third grid piece, one end of the movable contact arc striking piece, which is close to the movable contact, is bent to form an arc surface, and when the movable contact and the fixed contact are completely disconnected, the movable contact is electrically connected with the arc surface.
2. The arc extinguishing system according to claim 1, wherein the first and/or second and/or third grid is V-shaped.
3. The arc extinguishing system according to claim 1, wherein the arc striking plate comprises an integrally formed supporting portion and an arc plate, the supporting portion is T-shaped, the bottom of the supporting portion is electrically connected with one or more second grid plates, and two arc plates are respectively connected with two ends of the supporting portion.
4. The arc extinguishing system according to claim 1, wherein the thickness of the first grating sheet is 0.8-2.0 mm, the distance between two adjacent first grating sheets is 0.8-2.0 mm, the thickness of the second grating sheet is 0.8-2.0 mm, the distance between two adjacent second grating sheets is 0.8-2.0 mm, the thickness of the third grating sheet is 0.8-2.0 mm, and the distance between two adjacent third grating sheets is 0.8-2.0 mm.
5. A circuit breaker comprising the arc extinguishing system of any of claims 1-3, further comprising:
the inner base is internally provided with a first exhaust channel corresponding to the first arc-extinguishing grid sheet group, the second arc-extinguishing grid sheet group and the third arc-extinguishing grid sheet group;
the outer base is arranged outside the inner base, and a support column is arranged between the outer base and the inner base; the outer base is provided with a plurality of second exhaust channels, and the positions of the first exhaust channels and the second exhaust channels are not corresponding.
6. The circuit breaker of claim 5, wherein the first exhaust passage has a thickness of: 5-50 mm, the angle is 20-180 degrees, the thickness of second exhaust passage is 5-50 mm, and the angle is 20-180 degrees.
7. The circuit breaker of claim 5, wherein a gap is provided between the first exhaust channel and the first or second or third arc extinguishing gate sheet sets, and the gap is 0.8-2.0 mm.
8. The circuit breaker of claim 5, wherein said second exhaust passage has a de-ionization device disposed therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310354581.8A CN116313589B (en) | 2023-04-06 | 2023-04-06 | Arc extinguishing system and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310354581.8A CN116313589B (en) | 2023-04-06 | 2023-04-06 | Arc extinguishing system and circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116313589A true CN116313589A (en) | 2023-06-23 |
| CN116313589B CN116313589B (en) | 2023-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310354581.8A Active CN116313589B (en) | 2023-04-06 | 2023-04-06 | Arc extinguishing system and circuit breaker |
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| CN (1) | CN116313589B (en) |
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| CN117059453A (en) * | 2023-09-11 | 2023-11-14 | 浙江人民电器有限公司 | Built-in arc isolation cover, arc extinguishing system and switching device for switching device |
| CN118098900A (en) * | 2024-04-28 | 2024-05-28 | 瑞睿电气(浙江)有限公司 | Arc extinguishing device of AC/DC circuit breaker |
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| CN117059453A (en) * | 2023-09-11 | 2023-11-14 | 浙江人民电器有限公司 | Built-in arc isolation cover, arc extinguishing system and switching device for switching device |
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| CN116313589B (en) | 2023-11-17 |
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