CN107578938A - Low-voltage circuit breaker - Google Patents
Low-voltage circuit breaker Download PDFInfo
- Publication number
- CN107578938A CN107578938A CN201710928266.6A CN201710928266A CN107578938A CN 107578938 A CN107578938 A CN 107578938A CN 201710928266 A CN201710928266 A CN 201710928266A CN 107578938 A CN107578938 A CN 107578938A
- Authority
- CN
- China
- Prior art keywords
- contact
- striking
- arc
- circuit breaker
- low
- 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
Abstract
The present invention provides a kind of low-voltage circuit breaker, and it includes：Static contact, it is fixedly arranged on pedestal, and static contact is arranged in U-shaped poly- magnetic portion, and the end of static contact is provided with the first striking portion for tilting down extension, and the first striking portion is located at the top in U-shaped poly- magnetic portion；Moving contact, its can rotate positioned at the top of static contact, moving contact is in contact or is separated with static contact, and the free end of moving contact is provided with the second striking portion of the extension that is inclined upwardly；Arc-chutes, it is fixedly arranged on pedestal, is provided with top striking grid and bottom striking grid in arc-chutes, and striking grid in bottom is located at the top in U-shaped poly- magnetic portion and relative with the first striking portion, and top striking grid can be relative with the second striking portion.The present invention can increase electric arc in the case where not lengthening moving contact length and space out and pull open speed, lift the operating voltage and breaking capacity of low-voltage circuit breaker, small volume is low in energy consumption.
Description
Technical field
The present invention relates to low voltage electrical apparatus technology field, specifically a kind of high voltage, the plastic shell low voltage breaker of high breaking.
Background technology
In the prior art, breaker is divided into primary cut-out and low-voltage circuit breaker by its use range, and general voltage is
More than 3kV for primary cut-out, other are then low-voltage circuit breaker, in low-voltage circuit breaker, voltage be 800V and the above then
For high-tension low-voltage circuit breaker.At present, to realize the high voltage of low-voltage circuit breaker, high breaking capacity, generally use, which increases, goes out
The methods of arc chamber, lengthening lengths of contacts are to increase clearance between open contacts, series connection multiple breakpoints, although those methods can improve
The breaking capacity of breaker, but the volume of breaker can significantly increase, and cause the market demand of breaker to reduce, while open circuit
Device cost can increase, and reduce the market competitiveness.
In view of the above-mentioned problems of the prior art, the present inventor combines the design and use of related manufacturing field for many years
Experience, there is provided a kind of low-voltage circuit breaker, to overcome drawbacks described above.
The content of the invention
It is an object of the invention to provide a kind of low-voltage circuit breaker, and it can increase electricity in the case where not lengthening moving contact length
Arc spaces out and pulled open speed, lifts the operating voltage and breaking capacity of low-voltage circuit breaker, and small volume is low in energy consumption.
The above-mentioned purpose of the present invention can be realized using following technical proposal：
The present invention provides a kind of low-voltage circuit breaker, and it includes：Static contact, it is fixedly arranged on pedestal, and the static contact is worn
In U-shaped poly- magnetic portion, the end of the static contact is provided with the first striking portion for tilting down extension, and the first striking portion is located at institute
State the top in U-shaped poly- magnetic portion；Moving contact, its can rotate positioned at the top of the static contact, the moving contact and the stationary contact
Head is in contact or is separated, and the free end of the moving contact is provided with the second striking portion of the extension that is inclined upwardly；Arc-chutes, its is fixed
In on the pedestal, top striking grid and bottom striking grid are provided with the arc-chutes, the bottom striking grid is located at
The top in the U-shaped poly- magnetic portion and relative with the first striking portion, the top striking grid can be with the second striking portion
Relatively.
In a preferred embodiment, the static contact includes conducting base, and one end of the conducting base is provided with reversely
Matrix, the conducting base are arranged in the U-shaped poly- magnetic portion, and the reversely matrix is located at the top of the conducting base, described
First striking portion is fixedly arranged on the reverse matrix.
In a preferred embodiment, the moving contact includes conducting rod, and one end of the conducting rod can rotate fixed
In controlling organization, the other end of the conducting rod is provided with movable contact, and the reversely matrix is provided with mounting surface, on the mounting surface
Provided with the stationary contact that can be in contact with the movable contact.
In a preferred embodiment, the bottom striking grid is located at the lower section of the stationary contact, the bottom striking
Grid is relative with the lower end in the first striking portion and has the first distance therebetween；The top striking grid is positioned at described
The top of movable contact, the top striking grid include grid main body and the striking extension extended downwardly from the grid main body
Body, opened up in the moving contact to maximum position, the striking ennation is upper with the second striking portion
End is relative and has second distance therebetween.
In a preferred embodiment, first distance is 0.5mm-4mm, and the second distance is 1mm-3mm.
In a preferred embodiment, the mounting surface is parallel with the baseplane of the pedestal, or the mounting surface and institute
The baseplane for stating pedestal is at an acute angle.
In a preferred embodiment, the conductive base can be absorbed by being provided between the conducting base and the reversely matrix
The electric current formed poly- magnetic patch for being unfavorable for the outside magnetic field of vertical paper that electric arc moves to arc-chutes direction, the poly- magnetic in body
Block is made up of permeability magnetic material.
In a preferred embodiment, insulating boot is provided between the conducting base and the bottom striking grid, it is described
Insulating boot is located at the top in the U-shaped poly- magnetic portion.
In a preferred embodiment, the first striking portion is made up of permeability magnetic material, and the bottom striking grid is by leading
Magnetic material is made.
In a preferred embodiment, the front side in the arc-chutes and rear side are respectively equipped with one made of gas exhausted material
The stationary contact of arc insulating cover, the movable contact of the moving contact and the static contact is respectively positioned between two arc insulating covers, it is described every
Arc cover and the distance of the side of the static contact are less than the arc insulating cover and the distance of the side of the moving contact.
In a preferred embodiment, the moving contact of the low-voltage circuit breaker also includes two auxiliary moving contacts, two institutes
State the both sides that auxiliary moving contact is parallel to the moving contact, the stationary contact of the movable contact and the static contact of the auxiliary moving contact
The distance between be more than the distance between stationary contact of movable contact and the static contact of the moving contact.
The characteristics of low-voltage circuit breaker of the present invention and advantage are：
The present invention is by the first striking portion tilted down of static contact, by the electric arc at stationary contact along the first striking portion
First arc ignition face is quickly moved at the bottom striking grid of arc-chutes, while acclivitous second striking for passing through moving contact
Portion, second arc ignition face of the electric arc at movable contact along the second striking portion is quickly moved at the top striking grid of arc-chutes,
And by making the lower section that static contact passes through U-shaped poly- magnetic portion and U-shaped poly- magnetic portion is placed in bottom striking grid, make U-shaped poly- magnetic portion and bottom
High-intensity magnetic field is formed between the striking grid of end, electric arc quickly moves in the presence of the magnetic field to arc-chutes direction, not lengthen
The quick mobile of electric arc is realized in the case of moving contact length and is elongated, lifts the operating voltage and disjunction energy of low-voltage circuit breaker
Power, small volume are low in energy consumption.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the dimensional structure diagram of low-voltage circuit breaker of the present invention；
Fig. 2 is cross section structure diagram of the low-voltage circuit breaker of the present invention under "on" position；
Fig. 3 is the static contact of an embodiment and the structural representation of pedestal of low-voltage circuit breaker of the present invention；
Fig. 4 A are the structural representation in the U-shaped poly- magnetic portion of low-voltage circuit breaker of the present invention；
Fig. 4 B are combining structure schematic diagram of the static contact with U-shaped poly- magnetic portion of low-voltage circuit breaker of the present invention；
Fig. 5 A are the structural representation of the insulating boot of low-voltage circuit breaker of the present invention；
Fig. 5 B are the static contact and U-shaped poly- magnetic portion and the combining structure schematic diagram of insulating boot of low-voltage circuit breaker of the present invention；
Fig. 6 is the arc-chutes of low-voltage circuit breaker of the present invention and the structural representation of static contact；
Fig. 7 is the structural representation of the moving contact of low-voltage circuit breaker of the present invention；
Fig. 8 A are the electric current of low-voltage circuit breaker of the present invention and the structural representation of Distribution of Magnetic Field；
Fig. 8 B be along the B in Fig. 8 A to mplifying structure schematic diagram；
Fig. 9 is the structural representation of the bottom striking grid of low-voltage circuit breaker of the present invention；
Figure 10 is the low-voltage circuit breaker of the present invention structural representation that electric arc moves towards under gate-dividing state；
Figure 11 is the structural representation of another embodiment of the low-voltage circuit breaker of the present invention；
Figure 12 is the structural representation of the another embodiment of the low-voltage circuit breaker of the present invention.
Drawing reference numeral explanation：
1st, pedestal；11st, baseplane；2nd, static contact；21st, conducting base；211st, reverse matrix；212nd, mounting surface；22nd, stationary contact
Point；23rd, the first striking portion；231st, the first arc ignition face；232nd, lower end；24th, poly- magnetic patch；25th, U-shaped poly- magnetic portion；251st, end face；26、
Insulating boot；3rd, arc-chutes；31st, bottom striking grid；311st, striking point；32nd, arc insulating cover；33rd, top striking grid；331st, grid
Main body；332nd, striking ennation；333rd, striking head；4th, moving contact；41st, conducting rod；42nd, movable contact；43rd, the second striking portion；
431st, the second arc ignition face；44th, moving contact is aided in；5th, electric arc；6th, elongating arc；α, acute angle；β 1, acute angle；β 2, acute angle；F, magnetic field；
E, magnetic field；H, magnetic field；G, magnetic field；I, the sense of current；L1, the first distance；L2, second distance；L3, the 3rd distance；L4, gap；
L5, open away from；L6, striking open away from.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In addition to non-individual defines the direction pointed out, the direction such as upper and lower, forward and backward being referred to herein is with this hair
The direction such as upper and lower, forward and backward in Fig. 1 shown in bright is defined, and illustrates in this together.
In moulded case circuit breaker, usually contain (such as quiet at least one fixed contact point of each pole
Contact) and at least one mobile contact part (such as moving contact), in closure/disconnection of breaker, fixed contact point with
Mobile contact part is connected with each other or mutually disconnected, while is also set up in contact area by an arc-control device and a set of control machine
Structure, arc-control device are used to extinguish electric arc caused by mobile contact part connection or disconnection, and controlling organization is used to control movably to connect
The motion of contact portion point, to drive mobile contact part and fixed contact point connection or disconnection.
The present invention relates to the fixed contact in such breaker point, mobile contact part and arc-control device, specifically, such as
Shown in Fig. 1 to Figure 12, the present invention provides a kind of low-voltage circuit breaker, and it includes：Static contact 2, it is fixedly arranged on pedestal 1, described quiet
Contact 2 is arranged in U-shaped poly- magnetic portion 25, and the end of the static contact 2 is provided with the first striking portion 23 for tilting down extension, and described the
One striking portion 23 is located at the top in the U-shaped poly- magnetic portion 25；Moving contact 4, its can rotate positioned at the top of the static contact 2,
The moving contact 4 is in contact or is separated with the static contact 2, and the free end of the moving contact 4 is provided with the extension that is inclined upwardly
Second striking portion 43；Arc-chutes 3, it is fixedly arranged on the pedestal 1, and top striking grid 33 and bottom are provided with the arc-chutes 3
Hold striking grid 31, the bottom striking grid 31 be located at the top in the U-shaped poly- magnetic portion 25 and with the first striking portion 23
Relatively, the top striking grid 33 can be relative with the second striking portion 43.
More specifically, as shown in figs. 2 and 10, pedestal 1 is substantially in tabular, and static contact 2 is fixedly arranged on the upper table of pedestal 1
Face, the lower ends of arc-chutes 3 are fixedly arranged on pedestal 1, and a part for static contact 2 is located at the lower section of arc-chutes 3, and the end of static contact 2
Portion is located at the side of arc-chutes 3, and moving contact 4 is located at the top of the end of static contact 2 and relative with arc-chutes 3, moving contact 4 from
It can be in contact or be separated with the end of static contact 2 under the control of controlling organization by end, to realize the closure of low-voltage circuit breaker
With disconnection, U-shaped poly- magnetic portion 25 is taken the shape of the letter U (as illustrated in figures 4 a and 4b), and it is enclosed to set and formed by bottom wall and two side walls, the upper end of side wall
End face 251 is formed, opening is formed between the upper end of two side walls, is open towards arc-chutes 3.Low-voltage circuit breaker is in closure and disconnects
Caused electric arc 5, it can draw in acclivitous the second of the first striking portion 23 tilted down of static contact 2 and moving contact 4
Under the guiding of arc portion 43, elongating arc 6 is formed between the bottom striking grid 31 and top striking grid 33 of arc-chutes 3,
And U-shaped poly- magnetic portion 25 can produce and be advantageous to the magnetic field that electric arc moves towards the direction of arc-chutes 3, not lengthen moving contact length
In the case of increase electric arc space out and pull open speed, lift the operating voltage and breaking capacity of low-voltage circuit breaker, small volume, work(
Consume low.
Wherein, as shown in Fig. 2, Fig. 8 A, Fig. 8 B and Fig. 9, the bottom striking grid 31 is located at the U-shaped poly- magnetic portion 25
Top, U-shaped poly- magnetic portion 25 is enclosed with bottom striking grid 31 and set to form the loop construction with gap L 4, namely U-shaped poly- magnetic portion
25 are enclosed with bottom striking grid 31 and set the poly- magnetic closed loop to be formed with gap L 4, and strong leakage magnetic field E can be formed in the gap L 4, should
Magnetic field E can attract electric arc to be moved towards the direction of arc-chutes 3, and in the presence of the E of the magnetic field, bottom striking grid 31 is magnetized simultaneously
Slotted zone release magnetic field F (as shown in Figure 9) at the striking point 311 of bottom striking grid 31, magnetic field F can produce to electric arc 5
The raw Lorentz force towards the direction of arc-chutes 3, be advantageous to electric arc and moved to the direction of arc-chutes 3, it is preferred that the gap L 4 is
1mm-5mm。
Further, as shown in Figures 2 and 3, the static contact 2 includes conducting base 21, and the one of the conducting base 21
End is provided with reverse matrix 211, the conducting base 21 be arranged in the U-shaped poly- magnetic portion 25 (namely conducting base 21 be embedded in it is U-shaped
Poly- magnetic portion 25, enable also to produce magnetic field in the presence of electric current formed magnetic field of the U-shaped poly- magnetic portion 25 in conducting base 21), institute
The top that reverse matrix 211 is located at the conducting base 21 is stated, the first striking portion 23 is fixedly arranged on the reversely matrix 211,
Specifically, reversely matrix 211 is upward from one end of conducting base 21 and oppositely extending formation, conducting base 21 is located at arc-chutes
3 lower section, reverse matrix 211 are located at the side of arc-chutes 3, and electric current I flows to reverse matrix 211, reverse base through conducting base 21
Body 211 forms reverse current repulsion structure with moving contact 4, meanwhile, the outer surface in the first striking portion 23 forms the first arc ignition face
231, the upper end in the first striking portion 23 is connected to the end of reverse matrix 211, lower end 232 and the bottom striking in the first striking portion 23
The striking point 311 of grid 31 is horizontal relative and is located at static contact 2 with U-shaped poly- magnetic portion monoclinic phase pair about 25, namely U-shaped poly- magnetic portion 25
The first striking portion 23 lower end 232 lower left, the first striking portion 23 is tilted down extension, the first arc ignition face 231 and base
The baseplane 11 of seat 1 α at an acute angle, end face 251 and bottom in U-shaped poly- magnetic portion 25 in the first quartile of the xy1 coordinate systems shown in Fig. 3
Hold distance and the end face 251 of striking grid 31 equal with the distance of the lower end 232 in the first striking portion 23 of static contact 2, the distance
The gap of the poly- magnetic closed loop as formed, preferably, the gap is 3mm.
Further, as shown in Fig. 2 the moving contact 4 includes conducting rod 41, what one end of the conducting rod 41 can rotate
Controlling organization is fixedly arranged on, the other end of the conducting rod 41 is provided with movable contact 42, and the reversely matrix 211 is provided with mounting surface
212, the mounting surface 212 is provided with the stationary contact 22 that can be in contact with the movable contact 42, specifically, controlling organization is existing
Known structure, be will not be repeated here in technology, and one end of conducting rod 41 is articulated on controlling organization by rotating shaft, conducting rod 41
The other end lower surface welding movable contact 42, and the stationary contact 22 on movable contact 42 and reverse matrix 211 is relative, movable contact 42
Positioned at the lower section of top striking grid 33, stationary contact 22 is located at the top of bottom striking grid 31, and conducting rod 41 sets movable contact
The extension that is inclined upwardly of 42 one end forms the second striking portion 43, namely is tilted towards the top striking grid 33 of arc-chutes 3
Extension, the second striking portion 43 have the second arc ignition face 431 of energy pilot arc, upper end and the reverse matrix in the first striking portion 23
Abutted between 211 junction and stationary contact 22 or there is narrow gap, the gap can be 0.5mm；Pass through controlling organization control
The rotation of conducting rod 41 processed, and then control the contact with static contact 2 of moving contact 4 and separate, realization is switched on or switched off breaker, and
By the second striking portion 43 being arranged between movable contact 42 and arc-chutes 3 and it is arranged between stationary contact 22 and arc-chutes 3
First striking portion 23, pilot arc and elongating arc, in favor of arc extinction.
Further, as shown in Figure 2 and Figure 9, the bottom striking grid 31 is located at the lower section of the stationary contact 22, described
Bottom striking grid 31 is relative with the lower end 232 in the first striking portion 23 and has the first distance L1 therebetween, specifically,
As shown in figure 9, bottom striking grid 31 is provided with groove towards the side of moving contact 4, the centrosymmetric of groove is provided with two and drawn
Acnode 311, the first distance L1 are also between the striking point 311 of bottom striking grid 31 and the lower end 232 in the first striking portion 23
Distance, the first distance L1 extinguishing being provided with beneficial to electric arc；The top striking grid 33 is located at the movable contact 42
Top, the top striking grid 33 include grid main body 331 and the striking ennation extended downwardly from the grid main body 331
332, opened up in the moving contact 4 to maximum position (as shown in Figure 10), the striking ennation 332 and institute
State the upper end in the second striking portion 43 relatively and there is therebetween second distance L2, second distance L2 namely striking ennation 332
The striking first 333 of front end and the distance between second arc ignition face 431 in the second striking portion 43, second distance L2 setting is favourable
In the extinguishing of electric arc, as a result, caused electric arc 5 can be the second of the second striking portion 43 between movable contact 42 and stationary contact 22
The internal face of striking ennation 332 and first arc ignition face 231 in the first striking portion 23 of arc ignition face 431 and top striking grid 33
Guiding under, be elongated and as elongating arc 6 and enter arc-chutes 3 top striking grid 33 and bottom striking grid 31 it
Between, it is preferred that the first distance L1 is 0.5mm-4mm, and the second distance L2 is 1mm-3mm, preferably, the first distance L1
For 3mm, second distance L2 is 3mm.
Movable contact 42 of the angle with moving contact 4 for being used to install the mounting surface 212 of the stationary contact 22 of static contact 2 of the present invention
Installation direction match, the angle of specific mounting surface 212 is settable as follows：In one embodiment, as shown in figure 11, it is described
Mounting surface 212 is parallel with the baseplane 11 of the pedestal 1, in another embodiment, as shown in Fig. 2, Fig. 3 and Figure 12, the peace
Dress face 212 and the baseplane 11 of the pedestal 1 are at an acute angle, wherein, it can be xy1 that mounting surface 212 is at an acute angle with the institute of baseplane 11
Acute angles beta 2 (as shown in figure 12) in the first quartile of coordinate system or the acute angles beta 1 in the second quadrant of xy2 coordinate systems
(as shown in Figures 2 and 3), the installation direction of the movable contact 42 of moving contact 4 is consistent with the direction of mounting surface 212, herein not
It is limited.
Further, as shown in Fig. 2 the conducting base 21 and it is described be reversely provided between matrix 211 can absorb described in
The electric current formed poly- magnetic patch for being unfavorable for the outside magnetic field of vertical paper that electric arc moves to arc-chutes direction in conducting base 21
24, the poly- magnetic patch 24 is made up of permeability magnetic material, preferably, poly- magnetic patch 24 is bolted in the upper table of the conducting base 21 of static contact 2
Face, and positioned at the lower section of the lower section, the more particularly stationary contact 22 on reverse matrix 211 of reverse matrix 211, by magnetic conduction
Poly- magnetic patch 24 made of material absorbs the vertical outside magnetic field of paper caused by the top of conducting base 21, and discharges and hang down after being magnetized
The straight magnetic field of paper inwards, i.e., poly- magnetic patch 24 are used to weaken in conducting base 21 the electric current formed electric arc that is unfavorable for arc-chutes 3
The outside magnetic field of vertical paper of direction movement, and strengthen in reverse matrix 211 the electric current formed electric arc that is beneficial to the side of arc-chutes 3
To the magnetic field of mobile vertical paper inwards, moved beneficial to electric arc to the direction of arc-chutes 3, accelerate electric arc enter arc-chutes 3 and by
Elongate, extinguish.
Further, as shown in Fig. 2, Fig. 5 A and Fig. 5 B, between the conducting base 21 and the bottom striking grid 31
Provided with insulating boot 26, the insulating boot 26 is located at the top in the U-shaped poly- magnetic portion 25, specifically, the shape of insulating boot 26 substantially
Combined shaped substantially with the upper surface of conducting base 21 and the lower surface of reverse matrix 211 matches, and insulating boot 26 is arranged at
Between the conducting base 21 of static contact 2 and the bottom striking grid 31 of arc-chutes 3, for U-shaped poly- magnetic portion 25 and arc-chutes 3
Grid insulated, prevent U-shaped poly- magnetic portion 25 from puncturing with arc-chutes.
Further, the first striking portion 23 is made up of permeability magnetic material, and the bottom striking grid 31 is by permeability magnetic material
It is made so that the first striking portion 23 and bottom striking grid 31 can absorb the electric current in conducting base 21 above conducting base 21
It is caused to be unfavorable for the outside magnetic field G of vertical paper that electric arc moves to the direction of arc-chutes 3, and it is converted into and is advantageous to electric arc
The magnetic field of the vertical paper moved to the direction of arc-chutes 3 inwards, so that electric arc is quickly mobile to arc-chutes direction and elongates.
Further, as depicted in figs. 1 and 2, the front side in the arc-chutes 3 and rear side are respectively equipped with one by gas exhausted material
Manufactured arc insulating cover 32, the movable contact 42 of the moving contact 4 and the stationary contact 22 of the static contact 2 are respectively positioned on two arcs
Between cover 32, the arc insulating cover 32 and the distance of the side of the static contact 2 are less than the arc insulating cover 32 and the moving contact 4
The distance of side, realize makes the aerogenesis of arc insulating cover 32 within the very first time for producing electric arc, and is provided enough to the motion of moving contact 4
Space, specifically, gas exhausted material can be nylon etc., arc insulating cover 32 is discharged indifferent gas under the high temperature action of electric arc
Body, the arc insulating cover 32 of front side and the arc insulating cover 32 of rear side are symmetrical arranged, and the setting scope of arc insulating cover 32 includes static contact 2 and moved to touch
First 4 scope of activities, namely be closed to moving contact 4 including static contact 2 and moving contact 4 and open to the Zone Full of maximum position,
Certainly, the arc insulating cover 32 and the distance of the side of the static contact 2 can also be equal to the arc insulating cover 32 and the moving contact 4
Side distance, it is preferred that the distance of the side of the arc insulating cover 32 and the moving contact 4 is 0.1mm-3mm, the arc
Cover 32 and the distance of the side of the static contact 2 are 0.1mm-3mm, preferably, arc insulating cover 32 and the distance of the side of moving contact 4
For 1.5mm, arc insulating cover 32 and the distance of the side of static contact 2 are 0.1mm.
Further, as shown in fig. 7, the moving contact 4 of the low-voltage circuit breaker also include two auxiliary moving contacts 44, two
The auxiliary moving contact 44 is parallel to the both sides of the moving contact 4, to improve specified current capacity, the auxiliary moving contact 44
The distance between stationary contact 22 of movable contact and the static contact 2 is more than the movable contact 42 of the moving contact 4 and the static contact 2
The distance between stationary contact 22, auxiliary moving contact 44 is first divided with static contact 2 and close afterwards, in favor of electric arc the starting the arc and disjunction all
Completed at moving contact 4, namely when moving contact 4 contacts with static contact 2, the movable contact 42 of moving contact 4 and the stationary contact of static contact 2
Point 22 first contacts, and aids in the movable contact of moving contact 44 to divide with being contacted after the stationary contact 22 of static contact 2 in moving contact 4 and static contact 2
From when, the movable contact of auxiliary moving contact 44 first separates with the stationary contact 22 of static contact 2, the movable contact 42 of moving contact 4 and static contact 2
Stationary contact 22 after separate, specifically, auxiliary moving contact 44 is synchronized with the movement with moving contact 4, auxiliary moving contact 44 is provided with being used for
The movable contact for being in contact or being separated with the stationary contact 22 of static contact 2, aid in being not provided with arc ignition face, static contact 2 on moving contact 44
Stationary contact 22 width be equal to or slightly greater than the movable contact 42 of moving contact 4 and two auxiliary moving contact 44 movable contact width
Spend sum.Certainly, moving contact connected in parallel can be also not provided with the both sides of moving contact 4, to adapt to low specified current-carrying specification
Breaker, now, the width of the movable contact 42 of moving contact 4 are equal to the width of the stationary contact 22 of static contact 2.
When the moving contact 4 of the low-voltage circuit breaker of the present invention is in contact with static contact 2, as shown in Fig. 8 A, Fig. 8 B and Fig. 9, electricity
The flow direction for flowing I is successively after the conducting base 21 of static contact 2, reverse matrix 211, stationary contact 22, movable contact 42 to moving contact 4
Conducting rod 41, when moving contact 4 separates with static contact 2, between the movable contact 42 of moving contact 4 and the stationary contact 22 of static contact 2
Electric arc is produced, according to the right-hand rule, the electric current in conducting base 21 forms vertical paper in the region of the top of conducting base 21
Outside magnetic field G, while according to left hand rule, magnetic field G generates the Lorentz force away from the direction of arc-chutes 3 to electric arc, unfavorable
Moved in electric arc to the direction of arc-chutes 3；Based on the setting (according to the right-hand rule) in U-shaped poly- magnetic portion 25, conducting base 21 passes through U-shaped
The poly- magnetic closed loop (namely coil) with gap that poly- magnetic portion 25 is formed with bottom striking grid 31, forms in the gap location and lets out by force
Stray field E, make electric arc 5 quickly mobile towards arc-chutes 3 under magnetic field E attraction and elongate, and in the presence of the E of magnetic field, bottom
End striking grid 31 is magnetized and discharges magnetic field F in its slotted zone, and electric arc 5 is in the presence of the F of magnetic field (according to left hand rule)
By the Lorentz force towards the direction of arc-chutes 3, electric arc 5 is set quickly to be moved to the direction of arc-chutes 3；Meanwhile bottom striking grid
31st, the first striking portion 23 of static contact 2 and poly- magnetic patch 24 are respectively positioned on the region of the top of conducting base 21, and by permeability magnetic material
It is made, absorbable magnetic field G is simultaneously advantageous to vertical paper that electric arc moved to the direction of arc-chutes 3 inwards in the release of respective top
Magnetic field H, and the vertical paper that reversely electric current in matrix 211 is formed in the top (namely arc zone) of reverse matrix 211
Magnetic field H inwards, makes magnetic field H be strengthened, and Lorentz forces of the magnetic field H to electric arc towards the direction of arc-chutes 3, is advantageous to electric arc edge
First striking portion 23 and the second striking portion 43 quickly move to the direction of arc-chutes 3.
By test of many times, as shown in Figure 10, when moving contact 4 is opened, E, magnetic field F, magnetic field H and arc-chutes in magnetic field
In the presence of 3, the electric arc resulted from the stationary contact 22 of static contact 2 and the movable contact 42 of moving contact 4 can be from stationary contact 22
Quickly being moved to bottom striking grid 31 along the lower end 232 of the first arc ignition face 231, the first striking portion 23, (electric arc is from stationary contact 22
To the striking point 311 of bottom striking grid 31, open away from be changed into striking open away from, it is opened away from increase 20mm, namely mounting surface 212 to
3rd distance L3 of bottom striking grid 31 is 20mm), and quickly it is moved to top along the second arc ignition face 431 from movable contact 42
Striking grid 33 (the grid main body 331 of electric arc automated contact 42 to top striking grid 33, is opened and opened away from it away from being changed into striking
Open away from increase 29mm), electric arc 5 is moved into elongating arc 6, it is 83mm that the striking of elongating arc 6, which is opened away from L6, compared to initial
The 34mm's of electric arc 5 is opened away from L5, is elongated 49mm, namely the electric arc 5 when low-voltage circuit breaker disconnects significantly is elongated
144%.The present invention can make length that the electric arc 5 of the movable contact 42 for the stationary contact 22 and moving contact 4 for resulting from static contact 2 elongates more
It is long, obtain bigger striking and open away from realizing single-break structure high breaking voltage, and after electric arc 5 is quickly mobile, can effectively reduce quiet
Contact 22 and the scaling loss of movable contact 42, improve the electrical endurance number of breaker.
The present invention is drawn the electric arc at stationary contact 22 along first by the first striking portion 23 tilted down of static contact 2
First arc ignition face 231 of arc portion 23 is quickly moved at the bottom striking grid 31 of arc-chutes 3, at the same by moving contact 4 to
Upper inclined second striking portion 43, the electric arc at movable contact 42 is quickly moved along second arc ignition face 431 in the second striking portion 43
To the top striking grid 33 of arc-chutes 3, and by making static contact 2 be placed in through U-shaped poly- magnetic portion 25 and U-shaped poly- magnetic portion 25
The lower section of bottom striking grid 31, make to form high-intensity magnetic field E between U-shaped poly- magnetic portion 25 and bottom striking grid 31, electric arc 5 is in the magnetic
Quickly moved to the direction of arc-chutes 3 in the presence of the E of field, to realize the quick of electric arc in the case where not lengthening the length of moving contact 4
Mobile and elongation, lifts the operating voltage and breaking capacity of low-voltage circuit breaker, and small volume is low in energy consumption.
Described above is only presently preferred embodiments of the present invention, not does any formal limitation to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, has in any art
Usual skill, in the range of technical solution of the present invention is not departed from, when the technology contents using the disclosure above make it is a little
The equivalent embodiment of equivalent variations is changed or is modified to, as long as being the content without departing from technical solution of the present invention, according to the present invention
Any simple modification, equivalent change and modification for being made to above example of technical spirit, still fall within the technology of the present invention side
In the range of case.
Claims (11)
1. a kind of low-voltage circuit breaker, it is characterised in that the low-voltage circuit breaker includes：
Static contact, it is fixedly arranged on pedestal, and the static contact is arranged in U-shaped poly- magnetic portion, and the end of the static contact is provided with downwards
The first striking portion of extension is tilted, the first striking portion is located at the top in the U-shaped poly- magnetic portion；
Moving contact, its can rotate positioned at the top of the static contact, the moving contact is in contact with the static contact or phase point
From the free end of the moving contact is provided with the second striking portion of the extension that is inclined upwardly；
Arc-chutes, it is fixedly arranged on the pedestal, and top striking grid and bottom striking grid are provided with the arc-chutes, described
Striking grid in bottom is located at the top in the U-shaped poly- magnetic portion and, the top striking grid energy relative with the first striking portion
It is relative with the second striking portion.
2. low-voltage circuit breaker according to claim 1, it is characterised in that the static contact includes conducting base, described to lead
One end of electric matrix is provided with reverse matrix, and the conducting base is arranged in the U-shaped poly- magnetic portion, and the reversely matrix is positioned at described
The top of conducting base, the first striking portion are fixedly arranged on the reverse matrix.
3. low-voltage circuit breaker according to claim 2, it is characterised in that the moving contact includes conducting rod, the conduction
What one end of bar can rotate is fixedly arranged on controlling organization, and the other end of the conducting rod is provided with movable contact, described reversely to be set on matrix
There is mounting surface, the mounting surface is provided with the stationary contact that can be in contact with the movable contact.
4. low-voltage circuit breaker according to claim 3, it is characterised in that the bottom striking grid is located at the stationary contact
Lower section, the bottom striking grid is relative with the lower end in the first striking portion and has the first distance therebetween；It is described
Striking grid in top is located at the top of the movable contact, and the top striking grid includes grid main body and from the grid main body
The striking ennation extended downwardly, is opened up to maximum position in the moving contact, the striking ennation with
The upper end in the second striking portion is relative and has second distance therebetween.
5. low-voltage circuit breaker according to claim 4, it is characterised in that first distance is 0.5mm-4mm, described the
Two distances are 1mm-3mm.
6. low-voltage circuit breaker according to claim 3, it is characterised in that put down the baseplane of the mounting surface and the pedestal
OK, or the mounting surface and the pedestal baseplane it is at an acute angle.
7. low-voltage circuit breaker according to claim 2, it is characterised in that between the conducting base and the reversely matrix
Provided with that can absorb, electric current formed in the conducting base to be unfavorable for vertical paper that electric arc moved to arc-chutes direction outside
The poly- magnetic patch in magnetic field, the poly- magnetic patch are made up of permeability magnetic material.
8. low-voltage circuit breaker according to claim 2, it is characterised in that the conducting base and the bottom striking grid
Between be provided with insulating boot, the insulating boot is located at the top in the U-shaped poly- magnetic portion.
9. low-voltage circuit breaker according to claim 1, it is characterised in that the first striking portion is made up of permeability magnetic material,
The bottom striking grid is made up of permeability magnetic material.
10. low-voltage circuit breaker according to claim 1, it is characterised in that front side and rear side difference in the arc-chutes
Provided with one made of gas exhausted material arc insulating cover, the stationary contact of the movable contact of the moving contact and the static contact be respectively positioned on two
Between the arc insulating cover, the arc insulating cover and the distance of the side of the static contact are less than the arc insulating cover and the moving contact
The distance of side.
11. low-voltage circuit breaker according to claim 1, it is characterised in that the moving contact of the low-voltage circuit breaker also includes
Two auxiliary moving contacts, two auxiliary moving contacts are parallel to the both sides of the moving contact, and the dynamic of auxiliary moving contact touches
Point and the distance between stationary contact of the static contact be more than the moving contact movable contact and the static contact stationary contact it
Between distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710928266.6A CN107578938B (en) | 2017-10-09 | 2017-10-09 | Low-voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710928266.6A CN107578938B (en) | 2017-10-09 | 2017-10-09 | Low-voltage circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107578938A true CN107578938A (en) | 2018-01-12 |
| CN107578938B CN107578938B (en) | 2020-08-28 |
Family
ID=61040419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710928266.6A Active CN107578938B (en) | 2017-10-09 | 2017-10-09 | Low-voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107578938B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109616390A (en) * | 2018-12-28 | 2019-04-12 | 天津京人电器有限公司 | A kind of multipole switch |
| CN114360980A (en) * | 2021-12-31 | 2022-04-15 | 浙江华楷电气有限公司 | Arc extinguishing device and circuit breaker |
| WO2024017063A1 (en) * | 2022-07-18 | 2024-01-25 | 天津首瑞智能电气有限公司 | Moving contact of electric switch, and double-break rotary disconnector |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW364141B (en) * | 1994-06-14 | 1999-07-11 | Fuji Electric Co Ltd | A breaker |
| JP2009272148A (en) * | 2008-05-08 | 2009-11-19 | Fuji Electric Fa Components & Systems Co Ltd | Circuit breaker unit |
| CN201655717U (en) * | 2010-02-10 | 2010-11-24 | 浙江百事宝电器有限公司 | Static contact device of plastic shell breaker |
| KR20130048083A (en) * | 2011-11-01 | 2013-05-09 | 현대중공업 주식회사 | Arc runner of molded case circuit breaker |
| CN105097374A (en) * | 2014-05-16 | 2015-11-25 | 北京人民电器厂有限公司 | Breaker facilitating arc rapid movement and elongation |
| CN206322659U (en) * | 2016-11-24 | 2017-07-11 | 浙江正泰电器股份有限公司 | The assembling structure of breaker magnetic conduction sheet |
| CN206363921U (en) * | 2017-01-06 | 2017-07-28 | 常熟开关制造有限公司(原常熟开关厂） | The contact arc extinguishing device of breaker |
| CN107045968A (en) * | 2016-02-05 | 2017-08-15 | 上海良信电器股份有限公司 | It is a kind of to strengthen the quick arc-striking structure of breaker breaking capacity |
| CN207250371U (en) * | 2017-10-09 | 2018-04-17 | 首瑞（天津）电气设备有限公司 | Low-voltage circuit breaker |
-
2017
- 2017-10-09 CN CN201710928266.6A patent/CN107578938B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW364141B (en) * | 1994-06-14 | 1999-07-11 | Fuji Electric Co Ltd | A breaker |
| JP2009272148A (en) * | 2008-05-08 | 2009-11-19 | Fuji Electric Fa Components & Systems Co Ltd | Circuit breaker unit |
| CN201655717U (en) * | 2010-02-10 | 2010-11-24 | 浙江百事宝电器有限公司 | Static contact device of plastic shell breaker |
| KR20130048083A (en) * | 2011-11-01 | 2013-05-09 | 현대중공업 주식회사 | Arc runner of molded case circuit breaker |
| CN105097374A (en) * | 2014-05-16 | 2015-11-25 | 北京人民电器厂有限公司 | Breaker facilitating arc rapid movement and elongation |
| CN107045968A (en) * | 2016-02-05 | 2017-08-15 | 上海良信电器股份有限公司 | It is a kind of to strengthen the quick arc-striking structure of breaker breaking capacity |
| CN206322659U (en) * | 2016-11-24 | 2017-07-11 | 浙江正泰电器股份有限公司 | The assembling structure of breaker magnetic conduction sheet |
| CN206363921U (en) * | 2017-01-06 | 2017-07-28 | 常熟开关制造有限公司(原常熟开关厂） | The contact arc extinguishing device of breaker |
| CN207250371U (en) * | 2017-10-09 | 2018-04-17 | 首瑞（天津）电气设备有限公司 | Low-voltage circuit breaker |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109616390A (en) * | 2018-12-28 | 2019-04-12 | 天津京人电器有限公司 | A kind of multipole switch |
| CN109616390B (en) * | 2018-12-28 | 2021-10-26 | 天津京人电器有限公司 | Multi-pole switch |
| CN114360980A (en) * | 2021-12-31 | 2022-04-15 | 浙江华楷电气有限公司 | Arc extinguishing device and circuit breaker |
| CN114360980B (en) * | 2021-12-31 | 2022-11-04 | 浙江华楷电气有限公司 | Arc extinguishing device and circuit breaker |
| WO2024017063A1 (en) * | 2022-07-18 | 2024-01-25 | 天津首瑞智能电气有限公司 | Moving contact of electric switch, and double-break rotary disconnector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107578938B (en) | 2020-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105097374B (en) | A kind of breaker beneficial to the quick movement of electric arc and elongation | |
| CN107578938A (en) | Low-voltage circuit breaker | |
| CN206849755U (en) | The primary cut-out of synchronization double-action contact | |
| CN207250371U (en) | Low-voltage circuit breaker | |
| CN204558301U (en) | A kind of arc quenching system with magnetic blow-out formula and air-sweeping type arc extinguishing structure | |
| CN207199555U (en) | A kind of breaker | |
| CN104810222B (en) | The arc-chutes of a kind of fast arc extinction and apply the miniaturization chopper of these arc-chutes | |
| CN204215989U (en) | A kind of circuit breaker being beneficial to electric arc fast moving and elongation | |
| CN102592909B (en) | Magnetic blast arc quenching device for DC (direct current) circuit breaker | |
| CN206921752U (en) | Improve the high-voltage DC contactor structure of reverse electric life | |
| CN102610454B (en) | Upper inlet stationary contact device of molded case circuit breaker | |
| CN109659209A (en) | A kind of breaker fast arc extinction system | |
| CN209071214U (en) | A kind of contact of breaker arc-control device and its breaker | |
| CN204390966U (en) | Earthed switch contact and there is its direct acting plug-in type earthed switch | |
| CN206726990U (en) | A kind of arc quenching system of residual current action breaker | |
| CN203882932U (en) | Low-voltage breaker | |
| CN109119291B (en) | Arc extinguishing structure of direct current contactor | |
| CN204390941U (en) | Magnetic blowing arc extinguishing switch | |
| CN203552987U (en) | Breaker forced arc extinguishing apparatus | |
| CN109616390B (en) | Multi-pole switch | |
| CN208861856U (en) | A kind of insulation flash barrier and the arc-chutes with it | |
| CN203055835U (en) | High-voltage circuit-breaker device | |
| CN208352245U (en) | A kind of contact arc extinguishing device of breaker | |
| CN206451665U (en) | Closed type contactor with arc leading angle | |
| CN208422816U (en) | A kind of contact arc-extinguishing system of breaker |
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 | ||
| GR01 | Patent grant |