CN117457453A - Arc extinguishing structure of circuit breaker and circuit breaker - Google Patents
Arc extinguishing structure of circuit breaker and circuit breaker Download PDFInfo
- Publication number
- CN117457453A CN117457453A CN202311788422.5A CN202311788422A CN117457453A CN 117457453 A CN117457453 A CN 117457453A CN 202311788422 A CN202311788422 A CN 202311788422A CN 117457453 A CN117457453 A CN 117457453A
- Authority
- CN
- China
- Prior art keywords
- arc extinguishing
- arc
- contact
- circuit breaker
- magnet
- 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.)
- Granted
Links
- 230000000903 blocking effect Effects 0.000 claims description 37
- 238000009434 installation Methods 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 7
- 230000003068 static effect Effects 0.000 description 6
- 238000010891 electric arc Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses an arc extinguishing structure of a breaker in the field of a piezoelectric device, which can be used for direct current distribution protection in the field of new energy and is used for prolonging the service life of a contact to solve the problem of continuous arcing. The application still provides a circuit breaker, including above-mentioned arc extinguishing structure, arc extinguishing efficiency is high and long service life.
Description
Technical Field
The invention relates to the field of piezoelectric devices, in particular to an arc extinguishing structure of a circuit breaker and the circuit breaker, which can be applied to direct current distribution protection in the new energy fields of solar energy, wind energy, nuclear energy and the like.
Background
The direct current small current is not zero crossing point in the frame circuit breaker due to direct current, and when the direct current is very small, the current is difficult to enter the arc extinguishing chamber, so that the continuous arcing phenomenon of the product between the moving contact and the static contact occurs in the opening process, and part of the arc faces the moving contact, so that the service life of the moving contact is influenced.
In addition, the existing technical scheme generally causes polarity of products aiming at direct-current small-current arc extinction, two magnets are symmetrically arranged at the lower end of an arc extinguishing chamber, when current is forward, an arc moves towards the inside of the arc extinguishing chamber under the influence of a magnetic field of the magnets, and arc extinction is achieved, but when current is backward, the arc moves towards the outside of the arc extinguishing chamber, the arc cannot be extinguished, and the problem of continuous arcing still exists.
Disclosure of Invention
The invention aims to overcome at least one defect of the prior art and provides an arc extinguishing structure of a circuit breaker and the circuit breaker.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides an arc extinguishing structure of circuit breaker, includes moving contact, stationary contact and second arc extinguishing device, and second arc extinguishing device sets up relatively with the moving contact, including a plurality of second arc extinguishing pieces, still including setting up the first arc extinguishing device on the moving contact, first arc extinguishing device moves along with the moving contact, first arc extinguishing device includes a plurality of first arc extinguishing pieces.
Preferably, the contact part of the moving contact and the fixed contact is positioned between the first arc extinguishing device and the second arc extinguishing device.
Preferably, the movable contact further comprises at least one group of magnet groups, the magnet groups comprise two magnets, and the contact part of the movable contact and the fixed contact is positioned between the two magnets in the same group.
Preferably, two magnets of the magnet group are arranged on the same straight line, the magnetic poles of opposite faces of the two magnets are opposite or the same, and a connecting line between the two magnets is perpendicular to a connecting line between the first arc extinguishing device and the second arc extinguishing device.
Preferably, the magnet assembly is fixed to the first arc extinguishing device.
Preferably, the first arc extinguishing device comprises an arc blocking piece, the first arc extinguishing piece is fixed at the middle part of the arc blocking piece, the two ends of the arc blocking piece are provided with mounting parts, two magnets in the same group are respectively fixed on the two mounting parts of the arc blocking piece, and the mounting parts are closer to the contact part of the moving contact and the fixed contact relative to the first arc extinguishing piece.
Preferably, the magnet is fixedly clamped with the installation part of the arc blocking piece, the installation part is provided with a magnet groove, and the magnet is clamped into the magnet groove of the arc blocking piece.
Preferably, the two ends of the arc blocking piece extend upwards to form two extending plates positioned at two sides of the first arc extinguishing piece, the installation part is of a block structure which is attached to the extending plates, and the top end of the installation part is provided with the magnet groove.
Preferably, a plurality of arc extinguishing sheet grooves are formed in the middle of the arc blocking piece, and the first arc extinguishing sheet is inserted into the arc extinguishing sheet grooves and in interference fit with the arc extinguishing sheet grooves.
Preferably, the magnet is a permanent magnet.
Preferably, the arc blocking piece of the first arc extinguishing device is fixedly connected with the moving contact through a fixing screw, two ends of the arc blocking piece extend to one side to form two fixing lugs, and screw holes matched with the fixing screw are formed in the fixing lugs.
Preferably, the movable contact comprises a contact support and a plurality of movable contact pieces arranged in the contact support, the contact support is provided with an installation cavity, the movable contact pieces are arranged side by side and rotatably installed on the rotating shaft, the movable contact pieces are arranged in the installation cavity supported by the contact support through spring pretightening, one end of each movable contact piece is provided with a movable contact and extends out of the installation cavity, the other end of each movable contact piece is electrically connected through a flexible conductor, and the contact support is in transmission connection with the operating mechanism through a connecting rod.
Preferably, the arrangement direction of the plurality of first arc extinguishing plates is the same as the arrangement direction of the plurality of movable contact plates.
The invention also provides a circuit breaker, which comprises the arc extinguishing structure of any circuit breaker.
The arc extinguishing structure of the circuit breaker and the circuit breaker are provided with the first arc extinguishing device which is linked with the moving contact and is used for extinguishing the arc of which the part faces the moving contact, so that the arc extinguishing efficiency is further improved, the service life of a product is prolonged, and the first arc extinguishing device is used as an additional arc extinguishing device and is fixed on the moving contact without changing the original structure and layout of the circuit breaker, and has strong universality and compact and reasonable layout.
In addition, through two magnets with opposite or same opposite surface magnetic poles arranged between two arc extinguishing devices for guiding the electric arc to enter the arc extinguishing devices, the forward and reverse small currents can be cut off, the nonpolar small current arc extinguishing is realized, the arc extinguishing effect of the circuit breaker is enhanced, and the use safety and reliability are improved.
In addition, the magnet is arranged horizontally or vertically through the NS magnetic pole direction, the electric arc between the moving contact and the fixed contact is better guided into the two arc extinguishing devices at the upper part and the lower part under the influence of the magnetic field of the magnet, and the arc extinguishing effect is better.
In addition, the magnet group, the first arc-extinguishing device and the moving contact are kept relatively static, so that an arc is conveniently and well introduced into the first arc-extinguishing device to be extinguished, and the arc-extinguishing effect is good.
Drawings
FIG. 1 is a schematic view of the initial arc strike of a moving contact and a static contact separated during current reversal in the present invention;
FIG. 2 is a schematic view of the arc profile of the separated ends of the moving and stationary contacts during current reversal in accordance with the present invention;
FIG. 3 is a schematic view of the initial arc strike of the moving and static contacts separated during forward current flow in accordance with the present invention;
FIG. 4 is a schematic view of the arc profile of the separated ends of the moving and stationary contacts during forward current flow in accordance with the present invention;
fig. 5 is a schematic structural view of the first arc extinguishing device, the magnet assembly and the moving and static contacts of the present invention;
fig. 6 is a perspective view of a first arc extinguishing device, a magnet assembly and a moving contact according to the present invention;
FIG. 7 is a schematic illustration of the poles of the opposite pole magnet assembly of the present invention in an exploded condition;
FIG. 8 is a schematic illustration of a magnet assembly of the present invention with the same poles in an exploded condition;
fig. 9 is an exploded view of a first arc extinguishing device and magnet assembly of the present invention;
FIG. 10 is a schematic view of the structure of the arc baffle of the present invention;
a first arc extinguishing device 1; an arc blocking piece 11; a mounting portion 111; arc chute 112; a magnet groove 113; an extension plate 114; a fixing lug 115; a first arc extinguishing piece 12; a second arc extinguishing device 2; a second arc extinguishing piece 21; an arc striking piece 22; a magnet 3; a moving contact 4; a movable contact 41; a rotation shaft 42; contact support 43; a link 44; a soft conductor 45; a stationary contact 5; a set screw 6; screw holes 61.
Detailed Description
The following examples are given in connection with the accompanying drawings to further illustrate embodiments of the arc extinguishing structure of the circuit breaker and the circuit breaker of the present invention. The arc extinguishing structure of the circuit breaker and the circuit breaker of the present invention are not limited to the description of the following embodiments.
As shown in fig. 1 to 4, the circuit breaker of the present embodiment includes a moving contact 4, a fixed contact 5, and an arc extinguishing structure, wherein the moving contact 4 contacts with the fixed contact 5 to realize the circuit breaker on or off. The movable contact 4 in this embodiment includes a plurality of movable contact pieces 41, the plurality of movable contact pieces 41 are rotatably mounted in parallel, and a protruding movable contact is disposed on a side edge of one side of the movable contact piece 41, for contacting with the fixed contact 5; the fixed contact 5 of this embodiment has a block structure, and is provided with a fixed contact for mating with a movable contact, where the movable contact and the fixed contact serve as contact portions between the movable contact 4 and the fixed contact 5. Of course, the moving contact 4 may be a monolithic structure, and the fixed contact 5 may be a multi-piece assembly structure.
The arc extinguishing structure comprises a second arc extinguishing device 2, which is used for eliminating the arc generated by the separation of the moving contact 4 and the fixed contact 5 of the circuit breaker after the contact and the electrification, when the circuit breaker is opened, most of the arc can enter the second arc extinguishing device 2, the second arc extinguishing device 2 is usually close to the fixed contact 5 and is arranged opposite to the moving contact 4, the second arc extinguishing device 2 comprises a plurality of second arc extinguishing pieces 21, the arc extinguishing device 2 can also comprise an arc striking piece 22 for leading the arc into the second arc extinguishing device 2, the second arc extinguishing device 2 basically corresponds to the movement track of the moving contact 4, a plurality of groups of second arc extinguishing devices 2 can be arranged on the movement track corresponding to the moving contact 4 according to the requirement, or a plurality of second arc extinguishing pieces 21 can be arranged in the group of second arc extinguishing devices 2 as much as possible, and the movement track corresponding to the moving contact 4 can also form a certain arc shape so as to improve the arc extinguishing effect.
As shown in fig. 1 to 4, an improvement of the arc extinguishing structure of the present embodiment is that the arc extinguishing structure further comprises a first arc extinguishing device 1 disposed on the moving contact 4, the first arc extinguishing device 1 comprises a plurality of first arc extinguishing pieces 12, the first arc extinguishing device 1 is fixed on the moving contact 4, the first arc extinguishing device 1 moves along with the moving contact 4 and is used for extinguishing an arc with a part facing the moving contact 4, so as to further improve arc extinguishing efficiency, and improve service life of the circuit breaker, especially for a circuit breaker with a larger rated current. Obviously, the arc extinguishing structure of the embodiment can be used for not only a circuit breaker but also other switching appliances. As shown in fig. 1 to 4, the first arc extinguishing device 1 of the present embodiment is fixed on the moving contact 4, and is interlocked with the moving contact 4; the contact part of the moving contact 4 and the fixed contact 5 is positioned between the first arc extinguishing device 1 and the second arc extinguishing device 2, the second arc extinguishing device 2 extinguishes most of electric arcs, and the first arc extinguishing device 1 extinguishes the electric arcs which float to the moving contact 4.
Another improvement of this embodiment is that the arc extinguishing structure further comprises at least one set of magnet groups comprising two magnets 3, the contact portion of the moving contact 4 and the fixed contact 5 being located between the two magnets 3 of the same set, the magnet groups being used for moving the arc into the first arc extinguishing device 1 or the second arc extinguishing device 2. Preferably, the magnet group is located between the first arc extinguishing device 1 and the second arc extinguishing device 2, and is close to the first arc extinguishing device 1 and far away from the second arc extinguishing device 2. As a further development, the magnet assembly in this embodiment is also coupled to the moving contact 4, and is fastened to the first arc extinguishing device 1, and is fastened to the moving contact 4 by the first arc extinguishing device 1. Of course, the magnet assembly can also be fixed independently on the moving contact 4.
The arc extinguishing structure of the present embodiment is described in further detail below with reference to fig. 1 to 8:
the circuit breaker of the embodiment is a frame type circuit breaker and is used for circuits with higher rated currents, the rated currents can reach 1000A and above, and the circuit breaker can be applied to the protection of a conventional power distribution system and also can be used for the protection of a direct current power distribution system of new energy sources such as solar energy, wind energy, hydrogen energy and nuclear energy. In this embodiment, the moving contact 4 includes a contact support 43 and a plurality of moving contacts 41 disposed in the contact support 43, the contact support 43 is provided with an installation cavity, the plurality of moving contacts 41 are disposed side by side and rotatably installed on the rotating shaft 42, and are pretensioned by a spring to be disposed in the installation cavity of the contact support 43, one end of the moving contact 41 is provided with a moving contact and extends out of the installation cavity for being matched with the fixed contact 5, the other end of the moving contact 41 is electrically connected with the moving contact through a flexible conductor 45, the contact support 43 is in transmission connection with an operating mechanism through a connecting rod 44, the operating mechanism can drive the contact support 43 to swing, and the moving contact of the moving contact 41 is driven to contact with the fixed contact 5 to switch on or off the circuit breaker so as to realize the disconnection of the circuit breaker.
The arc extinguishing structure of the embodiment is used for eliminating an arc generated by separating a moving contact 4 from a fixed contact 5, and comprises a first arc extinguishing device 1, a second arc extinguishing device 2 and at least one group of magnet groups, wherein the contact part of the moving contact 4 and the fixed contact 5 of the circuit breaker is positioned between the first arc extinguishing device 1 and the second arc extinguishing device 2. The first arc extinguishing device 1 is used as an added arc extinguishing device and is arranged on the moving contact 4, and the following contact 4 moves to extinguish the arc of which the part faces the moving contact 4; in this embodiment, the first arc extinguishing device 1 is fixed on the moving contact 4, and is located at one side of the moving contact 4 away from the second arc extinguishing device 2, namely, the moving contact of the moving contact 4 is located between the first arc extinguishing device 1 and the second arc extinguishing device 2, so that the overall structure is simple, the layout is compact and reasonable, the original structure and layout of the circuit breaker do not need to be changed, and the universality is strong.
The magnet assembly in this embodiment comprises two magnets 3 arranged on the same straight line for moving the arc into the first arc extinguishing device 1, the opposite sides of the two magnets 3 have opposite or the same magnetic poles, wherein the two magnets 3 are placed with NS and NS or SN and SN as shown in fig. 7; the two magnets 3 with identical poles are placed with NS and SN or SN and NS as shown in fig. 8. As shown in fig. 1 and 2, the first arc-extinguishing device 1 and the second arc-extinguishing device 2 are both provided with arc-extinguishing plates, when the circuit breaker breaks reverse small current, after the moving contact 4 and the fixed contact 5 are separated, an electric arc is generated between the two, and part of the electric arc facing the moving contact can accelerate to move towards the first arc-extinguishing device 1 under the action of electromagnetic force F of the magnet 3, so that the first arc-extinguishing device 1 is used for extinguishing arc to realize breaking current; as shown in fig. 3 and 4, when the circuit breaker breaks small forward current, after the moving contact 4 and the fixed contact 5 are separated, an arc is generated between the moving contact and the fixed contact, and the arc can be accelerated to move towards the second arc extinguishing device 2 under the action of the electromagnetic force F of the magnet 3, so that the second arc extinguishing device 2 extinguishes to realize breaking current.
The arc extinguishing structure of the circuit breaker and the circuit breaker are arranged between two arc extinguishing devices through two magnets 3 with opposite or same opposite magnetic poles, and are used for guiding an electric arc to enter the arc extinguishing devices, so that forward and reverse small currents can be cut off, nonpolar small current arc extinguishing is realized, the arc extinguishing effect of the circuit breaker is enhanced, and the use safety and reliability are improved.
As shown in fig. 1 to 8, as a preferred embodiment of the positional relationship between the magnet group, which is located above the first arc extinguishing device 1, below the second arc extinguishing device 2, and close to the first arc extinguishing device 1, away from the second arc extinguishing device 2, and the contact portion between the moving contact 4 and the fixed contact 5, which is located between the two magnets 3 of the same group, and the connection line between the two magnets 3 of the magnet group is substantially perpendicular to the connection line between the first arc extinguishing device 1 and the second arc extinguishing device 2, and the contact portion between the first arc extinguishing device 1, the second arc extinguishing device 2 and the moving contact 4 and the fixed contact 5. The NS or NN or SS pole connection direction of the magnet 3 is preferably a horizontal direction or a vertical direction, wherein the NN or SS pole connection direction of the magnet 3 is a horizontal direction, that is, the NS pole connection direction of the magnet 3 is a vertical direction (not shown in the figure). The magnet 3 of the present embodiment is preferably a permanent magnet, and may be an electromagnet or the like as another example. The novel arc extinguishing device has the advantages that the overall structure is simple, the layout is compact and reasonable, the magnet is horizontally or vertically arranged in the direction of the NS magnetic pole, the arc between the moving contact and the fixed contact is better guided into the two arc extinguishing devices at the upper part and the lower part under the influence of the magnetic field of the magnet 3, and the arc extinguishing effect is better. Of course, a tilted arrangement of the magnet assembly is also possible.
As shown in fig. 1 to 8, as a preferable mode of the connection relationship of the magnet group and the first arc extinguishing device 1 and the moving contact 4, the magnet group and the first arc extinguishing device 1 are linked with the moving contact 4, the magnet group magnet 3 is fixed on the first arc extinguishing device 1, and the first arc extinguishing device 1 is fixed on the moving contact 4. The magnet group is kept relatively static with the first arc extinguishing device 1 and the moving contact 4, so that an arc is conveniently and well introduced into the first arc extinguishing device 1 to extinguish the arc, the arc extinguishing effect is good, the magnet group is linked with the first arc extinguishing device 1 and the moving contact 4 in a fixed mode, and the structure is simple and stable.
As shown in fig. 9 and 10, the first arc extinguishing device 1 of this embodiment includes an arc blocking member 11 and a plurality of first arc extinguishing plates 12, preferably, the arc blocking member 11 is an integrally formed structure made of a gas generating material, mounting portions 111 located above the first arc extinguishing plates 12 are disposed on two ends of the arc blocking member 11, two magnets 3 of the same group are respectively fixed on the two mounting portions 111 of the arc blocking member 11, in this embodiment, the magnets 3 are fixed on the inner sides of the mounting portions 111, the plurality of first arc extinguishing plates 12 are arranged in rows and fixed on the middle portion of the arc blocking member 11, and the mounting portions 111 are closer to the contact portion of the moving contact 4 and the fixed contact 5 relative to the first arc extinguishing plates 12, and are also closer to the second arc extinguishing device 2. The first arc extinguishing device 1, the magnet 3 and the moving contact 4 are fixed together, and the structure is simple, so that the first arc extinguishing device is convenient to be installed in a circuit breaker, and other parts are not interfered. The arrangement direction of the plurality of first arc extinguishing plates 12 in the present embodiment is the same as the arrangement direction of the plurality of movable contact plates 41, and the plane of the first arc extinguishing plates 12 is parallel to the plane of the movable contact plates 41. Of course, the arrangement direction of the movable contact 41 and the first arc extinguishing plate 12 includes, but is not limited to, the same, other angle arrangements are also possible, and the arc blocking member 11 may not be made of gas generating material. The structural design of this embodiment is in order to be convenient for the orderly reasonable overall arrangement of each mechanism of circuit breaker, compact structure, save space.
As shown in fig. 9 and 10, in the fixing structure between the arc blocking member 11 and the first arc extinguishing sheet 12 in this embodiment, a plurality of arc extinguishing sheet slots 112 for installing a plurality of first arc extinguishing sheets 12 are provided in the middle of the arc blocking member 11, and the first arc extinguishing sheets 12 are inserted into the arc extinguishing sheet slots 112 and are in interference fit with the arc extinguishing sheet slots 112 to fix the first arc extinguishing sheets 12 on the arc blocking member 11. The interference plug-in structure is convenient and firm to install. Of course, the arc blocking member 11 and the first arc extinguishing plate 12 may be fixed by injection molding, clamping, riveting, or other fixing connection methods.
As shown in fig. 9 and 10, in the fixing structure between the arc blocking member 11 and the magnet 3 in this embodiment, the magnet 3 is fastened and fixed to the mounting portion 111 of the arc blocking member 11, the mounting portion 111 is provided with a magnet slot 113, and the magnet 3 is fastened into the magnet slot 113 of the arc blocking member 11. Specifically, the two ends of the arc blocking member 11 extend upwards to form two extension plates 114 located at two sides of the first arc extinguishing plate 12, the mounting portion 111 is a block structure attached to the extension plates 114 in an integrally connected manner, and the top end of the block mounting portion 111 is provided with the magnet slot 113. The clamping type fixing structure is convenient to install. Of course, the arc baffle 11 and the magnet 3 may be fixed by adhesive fixing or other fixing methods.
As shown in fig. 6 to 10, in the fixing structure between the first arc extinguishing device 1 and the moving contact 4 in this embodiment, the first arc extinguishing device 1 is installed on the side where the moving contact 4 is provided with the moving contact, the arc blocking member 11 of the first arc extinguishing device 1 is fixedly connected with the contact support 43 of the moving contact 4 through the fixing screw 6, two ends of the arc blocking member 11 extend to one side to form two fixing lugs 115, the contact support 43 of the moving contact 4 is clamped between the two fixing lugs 115 of the arc blocking member 11, and screw holes 61 matched with the fixing screw 6 are formed in the fixing lugs 115 and the contact support 43 of the moving contact 4. Simple structure, compactness are reasonable, easy to assemble saves space.
As shown in fig. 1 to 4, the second arc extinguishing device 2 of the present embodiment is an arc extinguishing chamber structure including a plurality of second arc extinguishing plates 21 arranged in a row, an arc striking plate 22 for striking an arc, and a mounting mechanism for mounting the second arc extinguishing plates 21 and the arc striking plate 22. The arrangement directions of the second arc extinguishing plates 21 and the first arc extinguishing plates 12 in this embodiment are all horizontal and perpendicular to each other, that is, as shown in fig. 1, the plurality of second arc extinguishing plates 21 are arranged in sequence in the left-right direction, and the plurality of first arc extinguishing plates 12 are arranged in sequence in the front-rear direction. Of course, the arrangement direction of the second arc extinguishing plates 21 and the first arc extinguishing plates 12 includes, but is not limited to, a perpendicular relationship, and other angular arrangements or parallelism are also possible. The structural design of this embodiment is in order to be convenient for the orderly reasonable overall arrangement of each mechanism of circuit breaker, compact structure, save space. The structure of the second arc extinguishing device 2 in this embodiment is a prior art, and will not be described herein.
It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (14)
1. The utility model provides an arc extinguishing structure of circuit breaker, includes moving contact (4), stationary contact (5) and second arc extinguishing device (2), and second arc extinguishing device (2) set up with moving contact (4) relatively, including a plurality of second arc extinguishing piece (21), its characterized in that: the movable contact is characterized by further comprising a first arc extinguishing device (1) arranged on the movable contact (4), wherein the first arc extinguishing device (1) moves along with the movable contact (4), and the first arc extinguishing device (1) comprises a plurality of first arc extinguishing pieces (12).
2. The arc extinguishing structure of a circuit breaker according to claim 1, characterized in that: the contact part of the moving contact (4) and the fixed contact (5) is positioned between the first arc extinguishing device (1) and the second arc extinguishing device (2).
3. The arc extinguishing structure of a circuit breaker according to claim 1, characterized in that: the movable contact is characterized by further comprising at least one group of magnet groups, wherein the magnet groups comprise two magnets (3), and the contact part of the movable contact (4) and the fixed contact (5) is positioned between the two magnets (3) in the same group.
4. The arc extinguishing structure of a circuit breaker according to claim 3, characterized in that: the two magnets of the magnet group are arranged on the same straight line, the magnetic poles of the opposite faces of the two magnets (3) are opposite or the same, and the connecting line between the two magnets (3) is perpendicular to the connecting line between the first arc extinguishing device (1) and the second arc extinguishing device (2).
5. The arc extinguishing structure according to claim 3 or 4, characterized in that: the magnet group is fixed on the first arc extinguishing device (1).
6. The arc extinguishing structure of a circuit breaker according to claim 5, wherein: the first arc extinguishing device (1) comprises an arc blocking piece (11), a first arc extinguishing piece (12) is fixed at the middle part of the arc blocking piece (11), mounting parts (111) are arranged at two ends of the arc blocking piece (11), two magnets (3) in the same group are respectively fixed on the two mounting parts (111) of the arc blocking piece (11), and the mounting parts (111) are closer to the contact part of the moving contact (4) and the fixed contact (5) relative to the first arc extinguishing piece (12).
7. The arc extinguishing structure of a circuit breaker according to claim 6, wherein: the magnet (3) is fixedly clamped with the mounting part (111) of the arc blocking piece (11), a magnet groove (113) is formed in the mounting part (111), and the magnet (3) is clamped into the magnet groove (113) of the arc blocking piece (11).
8. The arc extinguishing structure of a circuit breaker according to claim 7, wherein: the two ends of the arc blocking piece (11) extend upwards to form two extending plates (114) positioned on two sides of the first arc extinguishing piece (12), the installation part (111) is of a block structure which is attached to and connected with the extending plates (114), and the top end of the installation part (111) is provided with the magnet groove (113).
9. The arc extinguishing structure of a circuit breaker according to claim 6, wherein: the middle part that keeps off arc piece (11) is equipped with a plurality of arc extinguishing piece grooves (112), first arc extinguishing piece (12) inserts in arc extinguishing piece groove (112), with arc extinguishing piece groove (112) interference fit.
10. The arc extinguishing structure of a circuit breaker according to claim 3, characterized in that: the magnet (3) is a permanent magnet.
11. The arc extinguishing structure of a circuit breaker according to claim 6, wherein: the arc blocking piece (11) of the first arc extinguishing device (1) is fixedly connected with the moving contact (4) through a fixing screw (6), two ends of the arc blocking piece (11) extend to one side to form two fixing lugs (115), and screw holes (61) matched with the fixing screw (6) are formed in the fixing lugs (115).
12. The arc extinguishing structure of a circuit breaker according to claim 1, characterized in that: the movable contact (4) comprises a contact support (43) and a plurality of movable contact pieces (41) arranged in the contact support (43), wherein the contact support (43) is provided with an installation cavity, the movable contact pieces (41) are arranged side by side and rotatably installed on a rotating shaft (42), the movable contact pieces are pre-tightly arranged in the installation cavity of the contact support (43) through springs, one end of each movable contact piece (41) is provided with a movable contact and extends out of the installation cavity, the other end of each movable contact piece (41) is electrically connected through a soft conductor (45), and the contact support (43) is in transmission connection with an operating mechanism through a connecting rod (44).
13. The arc extinguishing structure of a circuit breaker according to claim 12, characterized in that: the arrangement direction of the plurality of first arc extinguishing plates (12) is the same as the arrangement direction of the plurality of movable contact plates (41).
14. The circuit breaker, its characterized in that: arc extinguishing structure comprising a circuit breaker according to any of claims 1-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311788422.5A CN117457453B (en) | 2023-12-25 | Arc extinguishing structure of circuit breaker and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311788422.5A CN117457453B (en) | 2023-12-25 | Arc extinguishing structure of circuit breaker and circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117457453A true CN117457453A (en) | 2024-01-26 |
| CN117457453B CN117457453B (en) | 2024-04-30 |
Family
ID=
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201066667Y (en) * | 2007-05-29 | 2008-05-28 | 浙江正泰电器股份有限公司 | A contactor system for plastic breaker |
| KR20090004308U (en) * | 2007-11-02 | 2009-05-08 | 엘에스산전 주식회사 | Arc shielding apparatus for mold cased circuit breaker |
| CN203055836U (en) * | 2012-12-18 | 2013-07-10 | 西安交通大学 | Contact and arc-extinguishing system of universal type low-voltage circuit breaker |
| CN204927077U (en) * | 2015-09-12 | 2015-12-30 | 乐清市正雁电器有限公司 | Frame -type circuit breaker's contact system |
| CN205081083U (en) * | 2015-11-13 | 2016-03-09 | 浙江圣曦电气股份有限公司 | Universal type circuit breaker |
| CN205943952U (en) * | 2016-08-29 | 2017-02-08 | 浙江天正电气股份有限公司 | AC (alternating current) contactor |
| CN107017137A (en) * | 2017-05-22 | 2017-08-04 | 国网上海市电力公司 | A kind of movable contact system of frame circuit breaker |
| CN206516595U (en) * | 2017-03-08 | 2017-09-22 | 乐清市正雁电器有限公司 | Frame-type circuit breaker contact system |
| KR20170116450A (en) * | 2016-04-11 | 2017-10-19 | 엘에스산전 주식회사 | Magnetic blow out device for direct current breaker |
| KR20180003013U (en) * | 2017-04-11 | 2018-10-19 | 엘에스산전 주식회사 | Movable Contact Assembly for Air Circuit Breaker |
| CN109166747A (en) * | 2018-10-16 | 2019-01-08 | 武汉长海电气科技开发有限公司 | A kind of DC load switch |
| CN109360755A (en) * | 2018-11-26 | 2019-02-19 | 北京人民电器厂有限公司 | Arc-extinguishing mechanism and dc circuit breaker |
| CN111092007A (en) * | 2019-12-10 | 2020-05-01 | 上海电器科学研究所（集团）有限公司 | Frame-type circuit breaker striking arc extinguishing device and contact arc extinguishing system |
| CN112017881A (en) * | 2020-09-15 | 2020-12-01 | 厦门宏发开关设备有限公司 | Circuit breaker |
| CN212461578U (en) * | 2020-09-04 | 2021-02-02 | 上海电器股份有限公司人民电器厂 | Contact system of low-voltage circuit breaker |
| CN114843159A (en) * | 2022-04-22 | 2022-08-02 | 江苏大全凯帆开关股份有限公司 | Direct current breaker static contact device with non-polarity magnetic blow |
| CN218160246U (en) * | 2022-05-17 | 2022-12-27 | 浙江正泰电器股份有限公司 | Contact system and circuit breaker |
| CN219226094U (en) * | 2023-02-13 | 2023-06-20 | 上海正泰智能科技有限公司 | Circuit breaker |
| CN220172050U (en) * | 2023-04-24 | 2023-12-12 | 上海正泰智能科技有限公司 | Arc extinguishing chamber and circuit breaker |
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201066667Y (en) * | 2007-05-29 | 2008-05-28 | 浙江正泰电器股份有限公司 | A contactor system for plastic breaker |
| KR20090004308U (en) * | 2007-11-02 | 2009-05-08 | 엘에스산전 주식회사 | Arc shielding apparatus for mold cased circuit breaker |
| CN203055836U (en) * | 2012-12-18 | 2013-07-10 | 西安交通大学 | Contact and arc-extinguishing system of universal type low-voltage circuit breaker |
| CN204927077U (en) * | 2015-09-12 | 2015-12-30 | 乐清市正雁电器有限公司 | Frame -type circuit breaker's contact system |
| CN205081083U (en) * | 2015-11-13 | 2016-03-09 | 浙江圣曦电气股份有限公司 | Universal type circuit breaker |
| KR20170116450A (en) * | 2016-04-11 | 2017-10-19 | 엘에스산전 주식회사 | Magnetic blow out device for direct current breaker |
| CN205943952U (en) * | 2016-08-29 | 2017-02-08 | 浙江天正电气股份有限公司 | AC (alternating current) contactor |
| CN206516595U (en) * | 2017-03-08 | 2017-09-22 | 乐清市正雁电器有限公司 | Frame-type circuit breaker contact system |
| KR20180003013U (en) * | 2017-04-11 | 2018-10-19 | 엘에스산전 주식회사 | Movable Contact Assembly for Air Circuit Breaker |
| CN107017137A (en) * | 2017-05-22 | 2017-08-04 | 国网上海市电力公司 | A kind of movable contact system of frame circuit breaker |
| CN109166747A (en) * | 2018-10-16 | 2019-01-08 | 武汉长海电气科技开发有限公司 | A kind of DC load switch |
| CN109360755A (en) * | 2018-11-26 | 2019-02-19 | 北京人民电器厂有限公司 | Arc-extinguishing mechanism and dc circuit breaker |
| CN111092007A (en) * | 2019-12-10 | 2020-05-01 | 上海电器科学研究所（集团）有限公司 | Frame-type circuit breaker striking arc extinguishing device and contact arc extinguishing system |
| CN212461578U (en) * | 2020-09-04 | 2021-02-02 | 上海电器股份有限公司人民电器厂 | Contact system of low-voltage circuit breaker |
| CN112017881A (en) * | 2020-09-15 | 2020-12-01 | 厦门宏发开关设备有限公司 | Circuit breaker |
| CN114843159A (en) * | 2022-04-22 | 2022-08-02 | 江苏大全凯帆开关股份有限公司 | Direct current breaker static contact device with non-polarity magnetic blow |
| CN218160246U (en) * | 2022-05-17 | 2022-12-27 | 浙江正泰电器股份有限公司 | Contact system and circuit breaker |
| CN219226094U (en) * | 2023-02-13 | 2023-06-20 | 上海正泰智能科技有限公司 | Circuit breaker |
| CN220172050U (en) * | 2023-04-24 | 2023-12-12 | 上海正泰智能科技有限公司 | Arc extinguishing chamber and circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9214305B2 (en) | Switch with quenching chamber | |
| US9208977B2 (en) | Switch having a quenching chamber | |
| CN103262200A (en) | Circuit breaker | |
| CN102592906B (en) | Medium-pressure and high-capacity DC circuit breaker contact terminal system for improving short time endurance capability | |
| CN210142625U (en) | Short circuit resisting structure of high-capacity relay | |
| WO2017186061A1 (en) | Circuit breaker contact system and circuit breaker | |
| CN1199235A (en) | Dual baffle apparatus for electrical switching device | |
| CN117457453B (en) | Arc extinguishing structure of circuit breaker and circuit breaker | |
| CN213184182U (en) | Switch electric appliance | |
| CN111900029A (en) | DC isolating switch arc extinguish chamber structure for enhancing energy dissipation | |
| CN117457453A (en) | Arc extinguishing structure of circuit breaker and circuit breaker | |
| CN115064402A (en) | Switch unit, isolating switch and power supply system | |
| CN210110588U (en) | Arc extinguishing grid sheet layout structure of arc extinguishing chamber | |
| CN115104168A (en) | Switching device | |
| CN220400522U (en) | Circuit breaker | |
| CN217719431U (en) | Universal shell of alternating-current and direct-current isolating switch, alternating-current isolating switch and direct-current isolating switch | |
| CN220691955U (en) | Arc extinguishing mechanism and circuit breaker | |
| CN216624180U (en) | Plastic case circuit breaker | |
| CN216957864U (en) | Rotary type isolating switch arc extinguishing structure | |
| CN218241689U (en) | Magnetic arc extinguishing microswitch | |
| CN218004674U (en) | Relay device | |
| CN219958803U (en) | Contact mechanism | |
| CN215988568U (en) | Isolating switch | |
| CN218585914U (en) | Arc extinguishing device of circuit breaker | |
| CN220253120U (en) | Arc extinguishing structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |