CN107680891A - A kind of contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system - Google Patents
A kind of contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system Download PDFInfo
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- CN107680891A CN107680891A CN201711049439.3A CN201711049439A CN107680891A CN 107680891 A CN107680891 A CN 107680891A CN 201711049439 A CN201711049439 A CN 201711049439A CN 107680891 A CN107680891 A CN 107680891A
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- arc
- contact
- grid pieces
- extinguishing grid
- extinguishing
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- 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
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Abstract
The invention provides a kind of contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system, contact arc-extinguishing system includes：Contact system, including moving contact and static contact, moving contact have the main contact and arcing contact that can be contacted or separate with static contact；Arc quenching system, with the arc-chutes above contact system, with insulated channel and the multistage narrow slit connected above insulated channel and with insulated channel in arc-chutes, the width of multistage narrow slit reduces stepwise from the bottom to top, arcing contact is located in insulated channel, and main contact is located at outside arc quenching system；Low-voltage circuit breaker includes above-mentioned contact arc-extinguishing system.The present invention can effectively improve breaking capacity of the breaker under more than AC1000V high voltage.
Description
Technical field
The present invention relates to low-voltage circuit device technical field, especially a kind of contact arc-extinguishing system for breaker, low pressure
Breaker and arc quenching system.
Background technology
Omnipotent breaker (abbreviation ACB) is the breaker commonly used in low-voltage distribution apparatus, is current Low Voltage Electrical Apparatus
Inside most intelligent protection electrical equipment.
With the continuous extension of low-voltage electrical apparatus application field, many industries use a large amount of, large-scale, powerful device, therefore
Requirement of the power engineering to power supply improves constantly, correspondingly, to the electricity applied to the omnipotent breaker in circuit protection system
Pressure request also more and more higher.Current many industries (such as colliery, naval vessel) have changed low-voltage-powered AC660V electric power system
Make for AC1000V and more than, so can not only save the inputs of the products such as switch, the transformer of AC660V grades, but also
Number of cables can be reduced, simplify supply line；Whole electric power system is made more to save, safety.
Current omnipotent breaker can meet the needs of being applied to AC1000V operating voltages, but in AC1000V
And under the operating voltage of the above, the problem of breaking capacity is low be present.
It is the common technology for improving breaking capacity using double-breakpoint contact system, if but applying the technology and breaking in universal
On the device of road, necessarily make the structure of breaker increasingly complex, particularly in product closure, disconnection, the more difficult control of synchronism of contact
System, if using double-breakpoint structure, the manufacturing cost of product can be also increased considerably, and performance parameter is difficult to control, so mesh
Preceding in the market does not find double contact structure omnipotent breaker also, is not to improve breaker breaking capacity using double-breakpoint structure
Preferred scheme.
The content of the invention
It is an object of the invention to provide a kind of contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system, to improve breaker
Breaking capacity under more than AC1000V high voltage.
To reach above-mentioned purpose, the present invention proposes a kind of contact arc-extinguishing system, and it includes：Contact system, including moving contact
And static contact, the moving contact have the main contact and arcing contact that can be contacted or separate with the static contact；Arc quenching system, have
Arc-chutes above the contact system, the arc-chutes are interior to have insulated channel and in the insulated channel
Multistage narrow slit that is square and being connected with the insulated channel, the width of the multistage narrow slit reduce stepwise from the bottom to top, and the arc touches
In the insulated channel, the main contact is located at outside the arc quenching system head.
Contact arc-extinguishing system as described above, wherein, the arc quenching system includes：Multiple arc extinguishing grid pieces, successively side by side between
Every being arranged in the arc-chutes, each arc extinguishing grid pieces in the form of sheets, and including a body and are connected to the body bottom
Portion and two extensions separately, the body bottom portion of each arc extinguishing grid pieces are arranged with one between its two extension
The multistage narrow slit, multiple multistage narrow slits on multiple arc extinguishing grid pieces side by side and connect successively；Two pieces of insulating barriers, point
Not Guan Chuan multiple arc extinguishing grid pieces, two insulating barriers are located at below the bodies of multiple arc extinguishing grid pieces, and facing
Two extensions for being connected to each arc extinguishing grid pieces on the inside of, form the insulated channel between two insulating barriers.
Contact arc-extinguishing system as described above, wherein, the arc quenching system also includes：Arc separating wall, including two relative set
Put and side plate separately and the top plate between being connected at the top of two side plates, the middle part of the top plate has opening, more
The individual arc extinguishing grid pieces are located inside the arc separating wall, and each arc extinguishing grid pieces are connected between two side plates；Go out flame
Piece, cover in the opening；Arc-extinguish chamber, sealing are located at the top of the arc separating wall.
Contact arc-extinguishing system as described above, wherein, the width of the insulated channel is more than the maximum of the multistage narrow slit
Width.
Contact arc-extinguishing system as described above, wherein, the moving contact includes the conductive lamellar body of multiple length and multiple short-range missiles electricity
Lamellar body, the length of the conductive lamellar body of length are more than the length of the short-range missile electricity lamellar body, and each long conductor lamellar body has first
Contact point and the second contact point below the first make contact, each short-range missile electricity lamellar body have the 3rd contact point,
Multiple conductive lamellar bodies of the length and multiple short-range missile electricity lamellar bodies are arranged side by side and are sequentially connected, multiple conductive lamellar bodies of length
First make contact forms the first contact surface that can be contacted with the static contact of the arcing contact, multiple long conducting strips side by side
3rd contact point of the second contact point of body and multiple short-range missile electricity lamellar bodies formed side by side the main contact can with it is described quiet
Second contact surface of contact.
Contact arc-extinguishing system as described above, wherein, multiple short-range missile electricity lamellar bodies are symmetrically distributed in multiple length and led
The both sides of electric lamellar body.
Contact arc-extinguishing system as described above, wherein, it is provided with high-temperature insulation material between the adjacent conductive lamellar body of length
The bed of material.
Contact arc-extinguishing system as described above, wherein, the top surface of the direction multistage narrow slit of each conductive lamellar body of length
It is concavely provided with groove.
Contact arc-extinguishing system as described above, wherein, the static contact includes upper conducting boss and led on described
Lower conducting boss below electric boss, the upper conducting boss can contact conduction with the first contact surface of the arcing contact, described
Lower conducting boss can contact conduction with the second contact surface of the main contact, during breaker open operation, the arcing contact with
The whole disjunction path of the upper conducting boss is located in the insulated channel.
Contact arc-extinguishing system as described above, wherein, the static contact also includes above the upper conducting boss
Guide member, the guide member have towards the arcing contact and can be by caused by the arcing contact and the upper conducting boss disjunction
The guiding face that electric arc is introduced in the insulated channel.
The present invention also provides a kind of low-voltage circuit breaker, and it includes above-mentioned contact arc-extinguishing system.
The present invention also provides a kind of arc quenching system, and it has arc-chutes, has insulated channel, Yi Jiwei in the arc-chutes
The multistage narrow slit connected above the insulated channel and with the insulated channel, the width of the multistage narrow slit from the bottom to top by
Rank reduces.
Arc quenching system as described above, wherein, the arc quenching system includes：Multiple arc extinguishing grid pieces, successively spacing side by side set
Put in the arc-chutes, each arc extinguishing grid pieces in the form of sheets, and including a body and be connected to the body lower section and
Two extensions separately, the body bottom portion of each arc extinguishing grid pieces are arranged with an institute between its two extension
State multistage narrow slit, multiple multistage narrow slits on multiple arc extinguishing grid pieces side by side and connect successively；Two pieces of insulating barriers, are passed through respectively
Multiple arc extinguishing grid pieces are worn, two insulating barriers are located at below the body of multiple arc extinguishing grid pieces, and facing point
It is not connected on the inside of two extensions of each arc extinguishing grid pieces, the insulated channel is formed between two insulating barriers.
The contact arc-extinguishing system of the present invention, low-voltage circuit breaker and the characteristics of arc quenching system and advantage is：
1st, contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system of the invention, by setting insulated channel and width
The multistage narrow slit reduced stepwise from the bottom to top so that during breaker open operation, arcing contact and electric arc caused by static contact disjunction
Inside insulated channel, contribute to the aggregation of electric arc, and can make electric arc more directly, be inhaled into multistage narrow slit more quickly
Interior, making electric arc, rapid aggregation, electric arc sectional area significantly reduce again by multistage narrow slit, and arc resistance quickly increases, electric arc electricity
The quick increase of pressure, so that electric arc faster extinguishes, effectively improves disjunction of the breaker under more than AC1000V high voltage
Ability；
2nd, contact arc-extinguishing system and low-voltage circuit breaker of the invention, the conductive lamellar body of length of its moving contact were both led as main contact
Electricity, again conductive as arcing contact, the conductive lamellar body of length of lengthening opens arcing contact away from significantly increasing, when the conductive lamellar body of length and short-range missile electricity
When lamellar body does concentric rotational movement, the radius of turn of the first contact surface is bigger than the radius of turn of the second contact surface, can effectively improve
The breaking speed of arcing contact, arcing contact is reached safe arc extinguishing distance faster, be advantageous to arc extinction；
3rd, contact arc-extinguishing system and low-voltage circuit breaker of the invention, its static contact are provided with guide member, the guiding face of guide member
Energy pilot arc enters arc quenching system, contributes to electric arc rapid aggregation；
4th, contact arc-extinguishing system and arc quenching system of the invention, can be used for omnipotent breaker, can be used for other classes
The low-voltage circuit breaker of type, such as moulded case circuit breaker.
Brief description of the drawings
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, not delimit the scope of the invention.Wherein：
Fig. 1 is the front view of the contact arc-extinguishing system of the present invention；
Fig. 2 is the side view of the contact arc-extinguishing system of the present invention；
Fig. 3 be in the present invention contact system in the schematic diagram of moving contact and static contact contact condition；
Fig. 4 be in the present invention contact system in the schematic diagram of moving contact and static contact off-state；
Fig. 5 is the schematic diagram of moving contact in the present invention；
Fig. 6 is the partial enlarged drawing at A in Fig. 5；
Fig. 7 is the schematic diagram of static contact in the present invention；
Fig. 8 is the schematic diagram of arc quenching system in the present invention；
Fig. 9 is the schematic diagram of the low-voltage circuit breaker of the present invention；
Figure 10 is the schematic diagram of pedestal in Fig. 9；
Figure 11 is the schematic diagram of Fig. 9 bottom plates；
Figure 12 is the assembled state schematic diagram of operating mechanism and contact arc-extinguishing system in the present invention；
Figure 13 is the schematic diagram that static contact is attached to bottom plate in the present invention.
Main element label declaration：
1 contact system
11 moving contacts
The contact surface of 111 main contact 1,111 second
The contact surface of 112 arcing contact 1,121 first
The 113 conductive contact points of 1131 first make contact of lamellar body 1,132 second of length
1133 grooves
The bus of 114 the 3rd contact point of short-range missile electricity lamellar body 1,141 115
122 times conducting boss of conducting boss on 12 static contacts 121
The guiding face of 123 guide member 1231
The connecting rod of 13 contact supporting, 14 revolving support axle 15
2 arc quenching systems
21 insulated channel, the 22 multistage arc extinguishing grid pieces of narrow slit 23
The neck of 231 body, 232 extension 233
24 insulating barrier 241 is raised
The top plate of 25 arc separating wall, 251 side plate 252
26 arc-extinguish chambers
The groove of 3 pedestal, 31 extension 32
The boss of 4 bottom plate, 41 extension 42
The pin of 5 operating mechanism, 51 mechanism cantilever 52
6 insulating pads
The width of the width L2 insulated channels of the multistage narrow slits of L1
S1 arcing contacts open away from S2 main contacts open away from
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, now control illustrates this hair
Bright embodiment.Wherein, the use of Adjective or adverbial modifier " level " and " vertical ", "up" and "down" etc.
The relative reference being for only for ease of between multigroup term, and it is and non-depicted to any specific direction limit through modifying term
System.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the present invention proposes a kind of contact arc-extinguishing system, and it includes contact system 1 and gone out
Arc system 2；Wherein：
Contact system 1 includes the moving contact 11 and static contact 12 being oppositely arranged, and moving contact 11 has and can connect with static contact 12
Touch (as shown in Figure 3) or disconnect the main contact 111 and arcing contact 112 of (as shown in Figure 4), main contact 111 makes as normal power-up
With arcing contact 112 is used to undertake hard arc during circuit disjunction, plays a part of protecting main contact 111, such as main contact 111
Positioned at the lower section of arcing contact 112；
Arc quenching system 2 is located at the top of contact system 1, and for limiting electric arc and accelerating arc extinction, arc quenching system 2 has position
Arc-chutes above contact system 1 (directly over such as), arc-chutes are interior to have insulated channel 21 and positioned at insulated channel 21
Top and the multistage narrow slit 22 connected with insulated channel 21, the width L1 of multistage narrow slit reduce stepwise from the bottom to top (in other words by
Level reduces), in other words, the self-insulating passages 21 of width L1 of each multistage narrow slit reduce stepwise upwards, specifically, each multistage
Narrow slit 22 includes the first rank narrow slit, second-order narrow slit ... the n-th order narrow slit (n is integer) for setting gradually and connecting from the bottom to top,
The width of first rank narrow slit, the width of width ... the n-th order narrow slit of second-order narrow slit successively decrease successively, so that each multistage narrow slit
22 be substantially in the openning shape of inverted V-shaped (or stairstepping), and the width of each of which rank narrow slit (such as n-th order narrow slit) can be constant
(i.e. width is certain value) or change, such as width per single order narrow slit is gradually reduced that (width is gradually from the bottom to top
Contracting), the change width per single order narrow slit can be even variation (uniformly reducing from the bottom to top) or non-uniform change
(non-homogeneous reduction from the bottom to top), it is preferred that the width L2 of insulated channel is more than the Breadth Maximum of multistage narrow slit 22, in other words,
The width L2 of insulated channel is more than the width of the first rank narrow slit of bottommost；
Arcing contact 112 is located in insulated channel 21, it is preferred that during breaker open operation, arcing contact 112 and static contact
12 whole disjunction path is respectively positioned in insulated channel 21, it is, the whole motion path of arcing contact 112 is wrapped in insulation
In passage 21, think that good guide effect is played in the aggregation of electric arc；
Main contact 111 is located at outside arc quenching system 2, that is, outside insulated channel 21, in order to avoid damaged by electric arc.
The present invention is by the multistage narrow slit 22 that sets insulated channel 21 and width reduces stepwise from the bottom to top, and by arc
Contact 112 is arranged in insulated channel 21 so that during breaker open operation, caused by arcing contact 112 and the disjunction of static contact 12
Electric arc is located inside insulated channel 21, contributes to the aggregation of electric arc, and it is multistage that electric arc can be made more directly, to be more quickly inhaled into
In narrow slit 22, making electric arc, rapid aggregation, electric arc sectional area significantly reduce again by multistage narrow slit 22, and arc resistance quickly increases
Greatly, arc voltage quickly increases and (when arc voltage exceedes supply voltage, that is, reaches the primary condition of arc extinguishing), so that electric arc is more
Quickly extinguish, effectively increase the breaking capacity of breaker, the breaking capacity of breaker is not only improved under conventional voltage,
Under AC1000V and the high working voltage of the above, breaking capacity can equally be up to 50kA；
Further, since the arcing of arcing contact 112, arc extinguishing are all completed in arc quenching system 2, short circuit current is greatly reduced
Damage to main contact 111.
Again as shown in figure 1, in a specific embodiment, arc quenching system 2 includes multiple arc extinguishing grid pieces 23 and two pieces of insulation
Dividing plate 24；
Multiple arc extinguishing grid pieces 23 side by side and are disposed in arc-chutes successively, and multiple arc extinguishing grid pieces 23 are preferably at equal intervals
Set, each arc extinguishing grid pieces 23 in the form of sheets, and including a body 231 and are connected to the bottom of body 231 and separately two
Extension 232, i.e., each arc extinguishing grid pieces 23 are substantially inverted U shape structure, and the bottom of body 231 of each arc extinguishing grid pieces 23 is arranged with one
The individual multistage narrow slit 22 between its two extension 232, therefore, the arc quenching system 2 in the present embodiment have multiple multistage narrow
Seam 22, spacing side by side sets and spatially connected successively successively in the direction that multiple multistage narrow slits 22 arrange along multiple arc extinguishing grid pieces 23
Logical (insertion), each multistage narrow slit 22 are in the groove-like of inverted V-shaped (or stairstepping), and multistage narrow slit 22 is for example positioned at the bottom of body 231
The centre position in portion；
Two pieces of insulating barriers 24 extend through multiple arc extinguishing grid pieces 23, and every piece of insulating barrier 24 is across multiple arc extinguishings in other words
Grid 23, two insulating barriers 24 are located at the lower section of body 231 of multiple arc extinguishing grid pieces 23, and facing and separately connection respectively
In the inner side of two extension 232 of each arc extinguishing grid pieces 23, insulated channel 21 is formed between two insulating barriers 24, wherein every piece of insulation every
Plate 24 can be integral type structure or the split-type structural being spliced, for example, two extensions of each arc extinguishing grid pieces 23
The inner side of portion 232 is arranged with neck 233 respectively, and the lateral surface of two pieces of insulating barriers 24 is respectively equipped with the projection 241 of strip, to divide
Not by respective raised 241 and the 233 corresponding clamping of neck on two extensions 232, neck 233 and projection 241 are for example in T
Shape.
Specifically, the thickness direction for defining arc extinguishing grid pieces 23 is first direction, and the short transverse of arc extinguishing grid pieces 23 is second
Direction, second direction are, for example, vertical direction, and the widths of arc extinguishing grid pieces 23 is third direction, first direction, second direction
It is vertical two-by-two with third direction, multiple arc extinguishing grid pieces 23 in the first direction successively side by side and be arranged at intervals；Multiple multistage narrow slits 22
Side by side and it is arranged at intervals successively in the first direction, each height of multistage narrow slit 22 in a second direction is less than the height of body 231
Degree, width of each multistage narrow slit 22 on third direction are less than the width of body 231, and each multistage narrow slit 22 is in third direction
On width reduce stepwise from the bottom to top in a second direction；The length of every piece of insulating barrier 24 in a first direction is equal to multiple go out
The summation of spacing between the thickness of arc grid 23 and each adjacent arc extinguishing grid pieces 23, the height of every piece of insulating barrier 24 in a second direction
Degree is equal to the height of the extension 232 of arc extinguishing grid pieces 23 in a second direction；The length of insulated channel 21 in a first direction etc.
In the length of insulating barrier 24, the height of insulated channel 21 in a second direction is equal to the height of insulating barrier 24, insulated channel
21 width on third direction is equal to the spacing between two pieces of insulating barriers 24.
Further, multiple multistage narrow slits 22 on multiple arc extinguishing grid pieces 23 are aligned (in the row of multiple arc extinguishing grid pieces 23 successively
Face or overlapping on column direction), but the present invention is not limited thereto, and the multistage narrow slit 22 on multiple arc extinguishing grid pieces 23 can also be submitted
Mistake arrangement.
Further, insulating barrier 24 can produce the insulating materials of inert gas by burning and be made, and be easy to arc extinction, and will
The arcing contact 112 stretched into insulated channel 21 is dielectrically separated from arc extinguishing grid pieces 23, and the material of insulating barrier 24 is, for example, nylon66 fiber
(PA66)。
As shown in Fig. 1, Fig. 8, further, arc quenching system 2 also includes arc separating wall 25, go out flame piece (not shown) and arc-extinguish chamber
26, form arc-chutes in arc separating wall 25, arc separating wall 25 is oppositely arranged including two and side plate 251 separately and is connected to
Top plate 252 between the top of biside plate 251, such as side plate 251 is placed vertically and top plate 252 is horizontal positioned, in top plate 252
Portion has opening (not shown), and multiple arc extinguishing grid pieces 23 are located inside arc separating wall 25, and each arc extinguishing grid pieces 23 are connected to two
Be provided between side plate 251, such as in arc separating wall 25 it is multiple successively side by side and spaced slot (not shown), multiple arc extinguishings
Grid 23 corresponds to be plugged in multiple slots respectively；
The flame piece that goes out is covered in the opening at the middle part of top plate 252, and for extinguishing the electric arc sprayed with air-flow, go out flame piece in other words
For longitudinal arc extinguishing (extinguishing of electric arc is divided into vertical and horizontal both direction)；
The sealing of arc-extinguish chamber 26 is located at the top of arc separating wall 25, such as arc-extinguish chamber 26 is connected by screw one with arc separating wall 25
Rise, arc-extinguish chamber 26 closes the arc-chutes in arc separating wall 25.
Wherein, arc separating wall 25 is made up of high-strength insulating material, such as by DMC-2 (BMC), DMC-3 (bulks
Moulding compound), BMC-1 (BMC) material is made.
In the present embodiment, by setting arc separating wall 25, can by the closure of the arcing contact 112 of moving contact 11 and static contact 12 and
Disjunction position set completely is dead, and the arcing and arc extinguishing of arcing contact 112 are all completed in the arc-chutes of arc separating wall 25, are greatly reduced
Damage of the short circuit current to main contact 111.
As shown in Fig. 1, Fig. 5, Fig. 6, in another specific embodiment, it is long conductive that moving contact 11 includes multiple (i.e. multi-discs)
Lamellar body 113 (or being the first conductive lamellar body) and multiple (i.e. multi-disc) short-range missile electricity lamellar bodies 114 (or being the second conductive lamellar body), it is long
The length of conductive lamellar body 113 is more than the length of short-range missile electricity lamellar body 114, that is, the conductive lamellar body for growing conductive lamellar body 113 to lengthen, each
Long conductor lamellar body has first make contact 1131 and the second contact point 1132 positioned at the lower section of first make contact 1131, the first contact
The contact point 1132 of point 1131 and second is respectively positioned on the side towards static contact 12 of long conductive lamellar body 113, each short-range missile electricity lamellar body
114 have the 3rd contact point 1141, and the 3rd contact point 1141 is located at the side towards static contact 12 of short-range missile electricity lamellar body 114, more
Individual long conductive lamellar body 113 and multiple short-range missile electricity lamellar bodies 114 are arranged side by side and are sequentially connected, for the conductive He of lamellar body 113 of multiple length
The ordering of multiple short-range missile electricity lamellar bodies 114, the present embodiment are not any limitation as；The first make contact of multiple conductive lamellar bodies 113 of length
1131 form the first contact surface 1121 (or being arcing face) that can be contacted with static contact 12 of arcing contact 112, Duo Gechang side by side
3rd contact point 1141 of the second contact point 1132 of conductive lamellar body 113 and multiple short-range missile electricity lamellar bodies 114 forms main contact side by side
111 the second contact surface 1111 that can be contacted with static contact 12, the first contact surface 1121 are located at the top of the second contact surface 1111, the
The width of one contact surface 1121 is less than the width of the second contact surface 1111.
In the present embodiment, by the way that more length of a film conducting strip bodies 113 to be arranged to the form of parallel shunt, monolithic length can be reduced and led
The striking burden of electric lamellar body 113, by setting the conductive lamellar body 113 of length lengthened, by between arcing contact 112 and main contact 111
Distance is elongated, and can be opened arcing contact and be significantly increased away from S1, when the conductive lamellar body 113 of length and the (arcing contact in other words of short-range missile electricity lamellar body 114
112 and main contact 111) when doing concentric rotational movement, the rotation of the radius of turn of the first contact surface 1121 than the second contact surface 1111
Turn that radius is big, can so effectively improve the breaking speed of arcing contact 112, allow arcing contact 112 faster reach safe arc extinguishing away from
From being advantageous to arc extinction；
In addition, by setting short-range missile electricity lamellar body 114, with all using long conductive lamellar body 113 compared with, breaker will not be increased
Volume, and cost can be reduced.For example, the quantity of long conductive lamellar body 113 accounts for the three of all conductive lamellar body total quantitys of moving contact 11
/ mono- to half.
As shown in figure 5, further, multiple conductive lamellar bodies 113 of length are arranged side by side and are sequentially connected, multiple short-range missile electricity lamellar bodies
114 are symmetrically distributed in the both sides of the conductive lamellar body 113 of multiple length, that is to say, that multiple conductive lamellar bodies 113 of length are multiple positioned at centre
Short-range missile electricity lamellar body 114 is located at both sides, can so make electric arc be easier to assemble, electric arc caused by arcing contact 112 is more concentrated relatively.
Further, high-temperature insulation material layer is provided between the conductive lamellar body 113 of adjacent length, by setting high-temperature insulation
Material layer, it is avoided that the long conductive burning posterior synechia of lamellar body 113 and influences the conductive effect that monolithic grows conductive lamellar body 113.Wherein, it is resistance to
The material of high temperature insulating material layer is, for example, Nuo meter Ke Si paper, DMC-1 (BMC) or BMC-1 (BMC).
Further, silver point is welded with the first make contact 1131 of long conductor lamellar body, to increase the electric conductivity of arcing contact 112
Can be with arc resistant corrosion strength, the fire resistance and striking ability for enabling moving contact 11 are obviously improved, and extend the electricity of moving contact 11
Life-span.
As shown in Figure 5, Figure 6, further, the top surface of the multistage narrow slit 22 of direction of the conductive lamellar body 113 of each length is concavely provided with recessed
Groove 1133, by setting groove 1133, the bounce of electric arc can be increased, be easy to elongating arc, increased electric arc internal resistance, electric arc is brought into
Arc quenching system 2.
As shown in figure 5, further, contact system 1 also includes contact supporting 13, the conductive lamellar body 113 of multiple length and multiple short
Conductive lamellar body 114 can be connected on contact supporting 13 synchronous axial system by single-revolution support shaft 14, and can by rotate with it is quiet
Contact 12 is contacted or separated, and main contact 111 is between arcing contact 112 and revolving support axle 14, revolving support axle 14 in other words
Positioned at the lower section of main contact 111, therefore, when main contact 111 and arcing contact 112 do concentric rotational movement around revolution support shaft 14,
The radius of turn of arcing contact 112 is bigger than the radius of turn of main contact 111.
As shown in fig. 7, in a preferred embodiment, static contact 12 includes upper conducting boss 121 and positioned at upper conduction
The lower conducting boss 122 of the lower section of boss 121, upper conducting boss 121 can be contacted with the first contact surface 1121 of arcing contact 112 and led
Electricity, lower conducting boss 122 can contact conduction with the second contact surface 1111 of main contact 111, and during breaker open operation, arc touches
First 112 are located in insulated channel 21 with the whole disjunction path of upper conducting boss 121.
Wherein, the width of upper conducting boss 121 (on third direction) is less than lower conducting boss 122 (on third direction)
Width, matched with the width of the width with the first contact surface 1121 and the second contact surface 1111, it is preferred that upper conducting boss
121 width is not less than the width of the first contact surface 1121, and the width of lower conducting boss 122 is not less than the second contact surface 1111
Width, so that the first contact surface 1121 fully contacts with upper conducting boss 121, the second contact surface 1111 and lower conducting boss 122
Fully contact.
In addition, silver point can be welded in upper conducting boss 121 and lower conducting boss 122, to increase leading for static contact 12
Electrical property and arc resistant corrosion strength, the fire resistance and striking ability for enabling static contact 12 are obviously improved, and extend static contact 12
Electric life.
Again as shown in fig. 7, further, static contact 12 also includes the guide member 123 positioned at the upper top of conducting boss 121, leads
Drawing part 123 has towards arcing contact 112 and electric arc caused by arcing contact 112 and the upper disjunction of conducting boss 121 can be introduced into insulation
Guiding face 1231 in passage 21.By setting guide member 123, pilot arc is contributed to enter arc quenching system 2, with prior art
Compare, eliminate traditional striking chip architecture, be directly used as arc-striking structure by the use of the guide member 123 of static contact 12.
Further, guide member 123 is oblique for guiding boss (ramp structure) or the sheet metal component with gradient, guiding face 1231
Face, the inclined-plane of guide member 123 are supreme (close to one end of upper conducting boss 121) (one end away from upper conducting boss 121) under
Tilted towards the direction away from arcing contact 112, the thickness for guiding boss in other words is gradually reduced from the bottom to top, when using sheet metal component
When, sheet metal component is for example embedded in the top of conducting boss 121.
Using the contact arc-extinguishing system of the present invention, during breaker open operation, the conductive lamellar body 113 of length of moving contact 11
The first lower conducting boss with static contact 12 of the second contact surface 1111 (main contact 111 in other words) formed with short-range missile electricity lamellar body 114
122 separate, the first contact surface 1121 (arcing contact 112 in other words) that the conductive lamellar body 113 of the length of moving contact 11 is formed afterwards again with
The upper conducting boss 121 of static contact 12 separates, the upper conducting boss 121 of the first contact surface 1121 and static contact 12 of moving contact 11
Separation process carried out inside arc-chutes, and the first contact surface 1121 separate when pull-up electric arc arc-chutes bottom insulation
Aggregation is completed in passage 21, and electric arc is elongated between moving contact 11 and static contact 12, drawn and attenuated, and the electric arc of aggregation is directly inhaled into
In the multistage narrow slit 22 of top, electric arc is assembled again by multistage narrow slit 22, and is divided into multistage string by multiple arc extinguishing grid pieces 23
The short arc of connection, electric arc sectional area significantly reduce, and arc resistance quickly increases, and arc voltage exceedes supply voltage, reaches arc extinguishing
Primary condition.
During circuit-breaker switching on-off, the running order and prior art phase of arcing contact and main contact in the present invention
Together, it is：In breaker closing action process, arcing contact first contacts with static contact, and then main contact contacts with static contact again,
Arcing contact and static contact separate (under combined floodgate inactive state, main contact contact, arcing contact is off) simultaneously；In breaker
In separating brake action process, in the moment that main contact and static contact separate, arcing contact contacts with static contact, last arcing contact and stationary contact
Head separates (i.e. main contact separates prior to arcing contact).The specific implementation of above-mentioned running order can be found in prior art, hold not
Repeat.
The present invention also provides a kind of low-voltage circuit breaker, and it includes above-mentioned contact arc-extinguishing system.
As shown in Fig. 9, Figure 10, Figure 11, further, low-voltage circuit breaker also includes pedestal 3 and bottom plate 4, and moving contact 11 is for example
It is connected by screw on pedestal 3, static contact 12 is for example connected by screw on bottom plate 4, and is fixed on pedestal 3 with bottom plate 4
On, pedestal 3 and bottom plate 4 are for example linked together by screw and nut, form the insulation crust of low-voltage circuit breaker, in pedestal 3
Portion is provided with extension 31, and extension 41 is also correspondingly provided with inside bottom plate 4, and the extension 31 of pedestal 3 connects with the extension 41 of bottom plate 4
After being connected together, the inside of insulation crust is separated into one or more independent insulation chambers, these independent insulation chambers
Between be sealing and electrical isolation, for installing moving contact 11, static contact 12 and arc-chutes, the general of arc-extinguish chamber 26 in insulated cavity room
Arc-chutes are shut in the insulated cavity room that pedestal 3 and bottom plate 4 cooperatively form completely；On the matching part of pedestal 3 and bottom plate 4,
Groove 32 and boss 42 are respectively equipped with, corresponding groove 32 and boss 42 cooperate, make between insulation crust and exterior space,
And labyrinth type structure is formed between insulation crust internal chamber, to ensure the electricity of the inside of insulation crust and external conductive part
Gas security isolation.
As shown in figure 12, further, the connecting rod 15 on moving contact 11 is matched by the hole on pedestal 3 and mechanism cantilever 51
Close, and connected with pin 52, mechanism cantilever 51 belongs to a part for operating mechanism 5, and connecting rod 15 is by pin 52 by moving contact 11
It is hinged with mechanism cantilever 51, realize the connection of moving contact 11 and operating mechanism 5, the such divide-shut brake of operating mechanism 5 action
When, it is possible to drive moving contact 11 to rotate.
As shown in figure 13, further, also fixed (such as being fastened by screw) has incendivity to produce inert gas in bottom plate 4
Insulating pad 6, insulating pad 6 is located at the top of static contact 12, is easy to arc extinction, the material of insulating pad 6 is, for example, nylon
66(PA66)。
As shown in figure 8, the present invention also provides a kind of arc quenching system, it has arc-chutes, has insulated channel in arc-chutes
21 and the multistage narrow slit 22 that is connected above insulated channel 21 and with insulated channel 21, the width of multistage narrow slit 22 is under
It is supreme to reduce stepwise.
The arc quenching system of the present invention, by setting insulated channel 21, it can make caused by arcing contact 112 and the disjunction of static contact 12
Electric arc is gathered in insulated channel 21, by setting multistage narrow slit 22, electric arc can be made more directly, to be more quickly inhaled into multistage
In narrow slit 22, electric arc is assembled again by multistage narrow slit 22, and electric arc sectional area significantly reduces, and arc resistance quickly increases, electric arc
Voltage quickly increases and (when arc voltage exceedes supply voltage, that is, reaches the primary condition of arc extinguishing), so that electric arc is faster
Extinguish, the breaking capacity of breaker can be effectively improved.
Again as shown in figure 8, further, arc quenching system includes multiple arc extinguishing grid pieces 23 and two pieces of insulating barriers 24；It is multiple to go out
Arc grid 23 side by side and is disposed in arc-chutes successively, each arc extinguishing grid pieces 23 in the form of sheets, and including a body 231, with
And being connected to the bottom of body 231 and two extensions 232 separately, i.e., each arc extinguishing grid pieces 23 are substantially inverted U shape structure, often
The bottom of body 231 of individual arc extinguishing grid pieces 23 is arranged with a multistage narrow slit 22 between its two extension 232, multistage narrow slit
22 be in the groove-like of inverted V-shaped (or stairstepping), and therefore, the arc quenching system in the present embodiment has multiple multistage narrow slits 22, multiple
Spacing side by side sets and is spatially sequentially communicated (insertion) successively in the direction that multistage narrow slit 22 arranges along multiple arc extinguishing grid pieces 23；
Two pieces of insulating barriers 24 extend through multiple arc extinguishing grid pieces 23, and every piece of insulating barrier 24 is across multiple arc extinguishings in other words
Grid 23, two insulating barriers 24 are located at the lower section of body 231 of multiple arc extinguishing grid pieces 23, and facing and separately connection respectively
In the inner side of two extension 232 of each arc extinguishing grid pieces 23, insulated channel 21 is formed between two insulating barriers 24, wherein every piece of insulation every
Plate 24 can be integral type structure or the split-type structural being spliced, for example, two extensions of each arc extinguishing grid pieces 23
The inner side of portion 232 is arranged with neck 233 respectively, and the lateral surface of two pieces of insulating barriers 24 is respectively equipped with the projection 241 of strip, to divide
Not by respective raised 241 and the 233 corresponding clampings of neck of two extensions 232, neck 233 and projection 241 are for example in T
Shape.
The other structures of the arc quenching system of the present invention, including the structure of arc separating wall 25, the flame piece that goes out, arc-extinguish chamber 26 etc. and position
Relation, the arc quenching system 2 that can be found in above-mentioned contact arc-extinguishing system are configured, and appearance does not repeat.
The schematical embodiment of the present invention is the foregoing is only, is not limited to the scope of the present invention.It is any
Those skilled in the art, the equivalent variations made on the premise of the design of the present invention and principle is not departed from and modification, all should
Belong to the scope of protection of the invention.And it should be noted that the present invention each part be not limited in above-mentioned entirety should
With, each technical characteristic described in specification of the invention can according to be actually needed selection one individually use or select it is multinomial
Combine use, and therefore, the present invention covers the other combinations relevant with this case inventive point and concrete application in the nature of things.
Claims (13)
1. a kind of contact arc-extinguishing system, it is characterised in that the contact arc-extinguishing system includes：
There is the master that can be contacted or separate with the static contact to touch for contact system, including moving contact and static contact, the moving contact
Head and arcing contact；
Arc quenching system, there are the arc-chutes above the contact system, there is insulated channel, Yi Jiwei in the arc-chutes
The multistage narrow slit connected above the insulated channel and with the insulated channel, the width of the multistage narrow slit from the bottom to top by
Rank reduces, and the arcing contact is located in the insulated channel, and the main contact is located at outside the arc quenching system.
2. contact arc-extinguishing system as claimed in claim 1, it is characterised in that the arc quenching system includes：
Multiple arc extinguishing grid pieces, successively spacing side by side be arranged in the arc-chutes, each arc extinguishing grid pieces in the form of sheets, and including
One body and the body bottom portion and two extensions separately are connected to, the body bottom portion of each arc extinguishing grid pieces
Be arranged with a multistage narrow slit between its two extension, multiple multistage narrow slits on multiple arc extinguishing grid pieces according to
It is secondary side by side and connect；
Two pieces of insulating barriers, extend through multiple arc extinguishing grid pieces, and two insulating barriers are located at multiple arc extinguishing grid pieces
Body below, and on the inside of facing two extensions for being connected to each arc extinguishing grid pieces, two insulating barriers it
Between form the insulated channel.
3. contact arc-extinguishing system as claimed in claim 2, it is characterised in that the arc quenching system also includes：
Arc separating wall, including two be oppositely arranged and side plate separately and the top plate between being connected at the top of two side plates,
The middle part of the top plate has opening, and multiple arc extinguishing grid pieces are located inside the arc separating wall, and each arc extinguishing grid pieces
It is connected between two side plates；
Go out flame piece, covers in the opening；
Arc-extinguish chamber, sealing are located at the top of the arc separating wall.
4. contact arc-extinguishing system as claimed in claim 1, it is characterised in that the width of the insulated channel is more than described multistage
The Breadth Maximum of narrow slit.
5. the contact arc-extinguishing system as described in any one of Claims 1-4, it is characterised in that the moving contact includes multiple length
Conductive lamellar body and multiple short-range missile electricity lamellar bodies, the length of the conductive lamellar body of length are more than the length of the short-range missile electricity lamellar body, Mei Gesuo
Stating long conductor lamellar body has first make contact and the second contact point below the first make contact, each short-range missile electricity
Lamellar body has the 3rd contact point, and multiple conductive lamellar bodies of length and multiple short-range missile electricity lamellar bodies are arranged side by side and be sequentially connected,
What the first make contact of multiple conductive lamellar bodies of length formed the arcing contact side by side can be contacted with the static contact first connects
Contacting surface, the second contact point of multiple conductive lamellar bodies of length and the 3rd contact point of multiple short-range missile electricity lamellar bodies form institute side by side
State the second contact surface that can be contacted with the static contact of main contact.
6. contact arc-extinguishing system as claimed in claim 5, it is characterised in that multiple short-range missile electricity lamellar bodies are symmetrically distributed in more
The both sides of the individual conductive lamellar body of length.
7. contact arc-extinguishing system as claimed in claim 5, it is characterised in that be provided between the adjacent conductive lamellar body of length resistance to
High temperature insulating material layer.
8. contact arc-extinguishing system as claimed in claim 5, it is characterised in that the direction of each conductive lamellar body of length is described multistage
The top surface of narrow slit is concavely provided with groove.
9. contact arc-extinguishing system as claimed in claim 5, it is characterised in that the static contact include upper conducting boss and
Lower conducting boss below the upper conducting boss, the upper conducting boss can connect with the first contact surface of the arcing contact
Conduction is touched, the lower conducting boss can contact conduction with the second contact surface of the main contact, during breaker open operation, institute
State arcing contact and the whole disjunction path of the upper conducting boss is located in the insulated channel.
10. contact arc-extinguishing system as claimed in claim 9, it is characterised in that the static contact, which also includes being located on described, leads
Guide member above electric boss, the guide member have towards the arcing contact and can be by the arcing contact and the upper conductive stud
The guiding face that electric arc caused by platform disjunction is introduced in the insulated channel.
11. a kind of low-voltage circuit breaker, it is characterised in that the low-voltage circuit breaker is included as described in any one of claim 1 to 10
Contact arc-extinguishing system.
12. a kind of arc quenching system, it is characterised in that the arc quenching system has arc-chutes, has insulation logical in the arc-chutes
Road and the multistage narrow slit connected above the insulated channel and with the insulated channel, the width of the multistage narrow slit
Reduce stepwise from the bottom to top.
13. arc quenching system as claimed in claim 12, it is characterised in that the arc quenching system includes：
Multiple arc extinguishing grid pieces, successively spacing side by side be arranged in the arc-chutes, each arc extinguishing grid pieces in the form of sheets, and including
One body and the body bottom portion for being connected to the body lower section and two extensions separately, each arc extinguishing grid pieces
Be arranged with a multistage narrow slit between its two extension, multiple multistage narrow slits on multiple arc extinguishing grid pieces according to
It is secondary side by side and connect；
Two pieces of insulating barriers, extend through multiple arc extinguishing grid pieces, and two insulating barriers are located at multiple arc extinguishing grid pieces
Body below, and on the inside of facing two extensions for being connected to each arc extinguishing grid pieces, two insulating barriers it
Between form the insulated channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711049439.3A CN107680891B (en) | 2017-10-31 | 2017-10-31 | Contact arc extinguishing system, low-voltage circuit breaker and arc extinguishing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711049439.3A CN107680891B (en) | 2017-10-31 | 2017-10-31 | Contact arc extinguishing system, low-voltage circuit breaker and arc extinguishing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107680891A true CN107680891A (en) | 2018-02-09 |
| CN107680891B CN107680891B (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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| CN108461364A (en) * | 2018-04-20 | 2018-08-28 | 上海良信电器股份有限公司 | A kind of arc quenching system and the breaker of breaker |
| CN108538687A (en) * | 2018-04-20 | 2018-09-14 | 上海良信电器股份有限公司 | A kind of contact arc-extinguishing system of breaker |
| CN108597969A (en) * | 2018-04-20 | 2018-09-28 | 上海良信电器股份有限公司 | A kind of contact system of breaker |
| CN110033967A (en) * | 2019-04-18 | 2019-07-19 | 天津京人电器有限公司 | Arc quenching system 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 |
| CN114498212A (en) * | 2022-01-26 | 2022-05-13 | 南京超捷智能科技有限公司 | Connector for arc extinguishing during high-voltage live-line plugging |
| CN114496643A (en) * | 2020-10-25 | 2022-05-13 | Abb瑞士股份有限公司 | Interrupter for direct current interruption |
| WO2023206807A1 (en) * | 2022-04-29 | 2023-11-02 | 厦门宏发开关设备有限公司 | Breaking device |
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| 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 |
| CN111092007B (en) * | 2019-12-10 | 2022-07-01 | 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 |
| CN114496643A (en) * | 2020-10-25 | 2022-05-13 | Abb瑞士股份有限公司 | Interrupter for direct current interruption |
| CN114498212A (en) * | 2022-01-26 | 2022-05-13 | 南京超捷智能科技有限公司 | Connector for arc extinguishing during high-voltage live-line plugging |
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